Added my old emacs config

3019 files changed, 168384 insertions, 0 deletions

diff --git a/.emacs.d.back/#init.el# b/.emacs.d.back/#init.el#
new file mode 100644
index 00000000..1bfc721e
--- /dev/null
+++ b/.emacs.d.back/#init.el#
@@ -0,0 +1,42 @@
+;;; init.el --- rogs Emacs configuration
+;;
+;;; Commentary:
+;;
+;; This is my basic configuration for Emacs as text editor.
+;; It is mainly focused on Web Development with JS, React, Django and Node
+;;
+;;; Code:
+
+(setq user-full-name "Roger González")
+(setq user-mail-address "roger@rogs.me")
+
+(package-initialize)
+
+;; Define Folders
+(defvar core-dir (expand-file-name "core" user-emacs-directory)
+  "Directory containing core configuration.")
+
+(defvar setup-dir (expand-file-name "setup" user-emacs-directory)
+  "Directory containing modes configuration.")
+(setq custom-file "~/.emacs.d/core/rogs-custom.el")
+
+(add-to-list 'load-path core-dir)
+(add-to-list 'load-path setup-dir)
+(load custom-file)
+
+;; Load core configurations
+(require 'rogs-core)
+(require 'rogs-packages)
+(require 'rogs-ui)
+(require 'rogs-keybindings)
+
+;; Load modes configurations
+(require 'setup-web-mode)
+(require 'setup-js-mode)
+(require 'setup-flycheck-mode)
+(require 'setup-yaml-mode)
+(require 'setup-python-mode)
+(require 'setup-org-mode)
+
+(provide 'init.el)
+;;; init.el ends here
\ No newline at end of file
diff --git a/.emacs.d.back/#recentf# b/.emacs.d.back/#recentf#
new file mode 100644
index 00000000..86c2abeb
--- /dev/null
+++ b/.emacs.d.back/#recentf#
@@ -0,0 +1,31 @@
+;;; Automatically generated by ‘recentf’ on Thu Dec 19 21:28:33 2019.
+
+(setq recentf-list
+      '(
+        "/home/roger/Dropbox/org/rogs.org"
+        "/home/roger/Dropbox/org/personal.org"
+        "/home/roger/Dropbox/org/massive.org"
+        "/home/roger/Dropbox/org/massive-dailies.org"
+        "/home/roger/Dropbox/org/logbook-work.org"
+        "/home/roger/Dropbox/org/logbook-personal.org"
+        "/home/roger/.emacs.d/bookmarks"
+        "/home/roger/code/massive/cocacola/new-backend/app/core/models.py"
+        "/home/roger/code/massive/cocacola/new-backend/app/mail/connection.py"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Counter/index.js"
+        "/home/roger/code/massive/cocacola/new-backend/app/pincodes/serializers.py"
+        "/home/roger/code/massive/cocacola/new-backend/docker-compose.yml"
+        "/home/roger/code/massive/cocacola/frontend/app/theme.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/faqs/Faqs/index.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Home/home.reducer.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Home/index.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Home/home.selectors.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/faqs/Faqs/faqs.selectors.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Home/home.actions.js"
+        ))
+
+(setq recentf-filter-changer-current 'nil)
+
+
+;; Local Variables:
+;; coding: utf-8-emacs
+;; End:
diff --git a/.emacs.d.back/%backup%~ b/.emacs.d.back/%backup%~
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/%backup%~
diff --git a/.emacs.d.back/.emacs.desktop b/.emacs.d.back/.emacs.desktop
new file mode 100644
index 00000000..d000a06e
--- /dev/null
+++ b/.emacs.d.back/.emacs.desktop
@@ -0,0 +1,175 @@
+;; -*- mode: emacs-lisp; coding: emacs-mule; -*-
+;; --------------------------------------------------------------------------
+;; Desktop File for Emacs
+;; --------------------------------------------------------------------------
+;; Created Mon Jul 29 17:44:15 2019
+;; Desktop file format version 208
+;; Emacs version 26.2
+
+;; Global section:
+(setq desktop-saved-frameset [frameset 1 (23871 26799 185565 460000) (desktop . "208") "roger@roger-pc" nil nil ((((minibuffer . t) (undecorated) (override-redirect) (font-backend xft x) (font . "-ADBO-Source Code Pro-normal-normal-normal-*-15-*-*-*-m-0-iso10646-1") (font-parameter . "Source Code Pro Medium 11") (border-width . 0) (internal-border-width . 0) (right-divider-width . 0) (bottom-divider-width . 0) (vertical-scroll-bars) (horizontal-scroll-bars) (foreground-color . "#EEEEEE") (background-color . "#000000") (mouse-color . "black") (border-color . "black") (screen-gamma) (line-spacing) (left-fringe . 8) (right-fringe . 8) (no-special-glyphs) (scroll-bar-foreground) (scroll-bar-background) (menu-bar-lines . 0) (tool-bar-lines . 0) (title) (wait-for-wm . t) (tool-bar-position . top) (inhibit-double-buffering) (icon-type . t) (auto-raise) (auto-lower) (cursor-type . box) (scroll-bar-width . 0) (scroll-bar-height . 0) (alpha) (no-focus-on-map) (no-accept-focus) (fullscreen . maximized) (visibility . t) (skip-taskbar) (z-group) (display-type . color) (background-mode . dark) (cursor-color . "#BBFFAA") (sticky) (environment) (powerline-cache) (frameset--id . "44D6-602D-82FB-000C") (frameset--mini t . t) (modeline . t) (unsplittable) (icon-name) (display . ":0") (explicit-name) (user-size . t) (height . 52) (width . 211) (left . 1920) (top . 0)) ((min-height . 4) (min-width . 20) (min-height-ignore . 2) (min-width-ignore . 13) (min-height-safe . 1) (min-width-safe . 4) (min-pixel-height . 80) (min-pixel-width . 180) (min-pixel-height-ignore . 40) (min-pixel-width-ignore . 117) (min-pixel-height-safe . 20) (min-pixel-width-safe . 36)) hc (pixel-width . 1920) (pixel-height . 1035) (total-width . 213) (total-height . 52) (normal-height . 1.0) (normal-width . 1.0) (combination-limit) (leaf (pixel-width . 957) (pixel-height . 1035) (total-width . 106) (total-height . 52) (normal-height . 1.0) (normal-width . 0.5) (buffer "init.el" (selected . t) (hscroll . 0) (fringes 8 8 nil) (margins 3) (scroll-bars nil 0 t nil 0 t) (vscroll . 0) (dedicated) (point . 29) (start . 1))) (leaf (last . t) (pixel-width . 963) (pixel-height . 1035) (total-width . 107) (total-height . 52) (normal-height . 1.0) (normal-width . 0.5) (buffer "rogs-packages.el" (selected) (hscroll . 0) (fringes 8 8 nil) (margins 2) (scroll-bars nil 0 t nil 0 t) (vscroll . 0) (dedicated) (point . 1731) (start . 1)))))])
+(setq desktop-missing-file-warning nil)
+(setq tags-file-name nil)
+(setq tags-table-list nil)
+(setq search-ring '("neo" "magit" "dj_data" "token" "response" "default_ba" "load-path" "jwt" "init" "page-break" "fullNam" "post" "fullName" "get a" "user" "fish_abbr"))
+(setq regexp-search-ring '("promociones"))
+(setq register-alist nil)
+(setq file-name-history '("~/.emacs.d/core/rogs-ui.el" "~/.emacs.d/core/rogs-keybinding.el" "~/.emacs.d/README.md" "~/.config/fish/abbreviations.fish" "~/code/vascar/jobrobin/jobRobinBackEnd/README.md" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin_app/local_settings.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/apps.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin_app/settings.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/middlewares/subscription.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/views/CitiesView.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/tests/helper_functions.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/tests/test_vacancies.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/views/CandidatesResumeView.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/permissions.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/models/__init__.py" "~/code/vascar/jobrobin/jobRobinBackEnd/jobrobin/models/TechTestAnswers.py" "~/code/massive/cocacola/backend/app/app/urls.py" "~/code/massive/cocacola/backend/app/zappa_settings.json" "~/code/massive/cocacola/backend/app/web/serializers.py" "~/code/massive/cocacola/backend/app/web/urls.py" "~/code/massive/cocacola/backend/app/web/views.py" "~/code/massive/cocacola/backend/app/web/apps.py" "~/code/massive/cocacola/backend/app/users/urls.py" "~/code/massive/cocacola/backend/app/users/views.py" "~/code/massive/cocacola/backend/app/users/serializers.py" "~/code/massive/cocacola/backend/app/users/apps.py" "~/code/massive/cocacola/backend/app/pincodes/apps.py" "~/code/massive/cocacola/backend/requirements.txt" "~/code/massive/cocacola/backend/app/requirements.txt" "~/code/massive/cocacola/backend/app/pincodes/views.py" "~/code/massive/cocacola/backend/app/pincodes/user.py" "~/code/massive/cocacola/backend/app/pincodes/urls.py" "~/code/massive/cocacola/backend/app/pincodes/tools/filenames.py" "~/code/massive/cocacola/backend/app/pincodes/tools/cupon_uploader.py" "~/code/massive/cocacola/backend/app/pincodes/tests.py" "~/code/massive/cocacola/backend/app/pincodes/serializers.py" "~/code/massive/cocacola/backend/app/pincodes/models.py" "~/code/massive/cocacola/backend/app/pincodes/management/commands/wait_for_db.py" "~/code/massive/cocacola/backend/app/pincodes/admin.py" "~/code/massive/cocacola/backend/app/customAdmin/views.py" "~/code/massive/cocacola/backend/app/customAdmin/apps.py" "~/code/massive/cocacola/backend/app/customAdmin/admin.py" "~/code/massive/cocacola/backend/app/authentication/urls.py" "~/code/massive/cocacola/backend/app/authentication/views.py" "~/code/massive/cocacola/backend/app/authentication/manager.py" "~/code/massive/cocacola/backend/app/authentication/decorator/profile_validation.py" "~/code/massive/cocacola/backend/app/authentication/costom_authentications/authentication.py" "~/code/massive/cocacola/backend/app/authentication/config.py" "~/code/massive/cocacola/backend/app/authentication/apps.py" "~/code/massive/cocacola/backend/app/assets/views.py" "~/code/massive/cocacola/backend/app/assets/urls.py" "~/code/massive/cocacola/backend/app/assets/apps.py" "~/code/massive/cocacola/backend/docker-compose.yml" "~/code/massive/cocacola/backend/app/app/settings.py" "~/code/massive/cocacola/frontend/app/components/Walkthrough.js" "~/app.py" "~/code/massive/cocacola/frontend/app/containers/Notifications/index.js" "~/.emacs.d/init.el" "~/code/personal/identidadMisional/backend/src/docs/speaker.yaml" "~/code/personal/identidadMisional/backend/src/app.js" "~/code/personal/identidadMisional/backend/test/speaker.test.js" "~/code/personal/identidadMisional/backend/src/routes/lodging.js" "~/code/personal/identidadMisional/backend/src/utils/common.js" "~/code/personal/identidadMisional/backend/src/controllers/speaker.js" "~/code/personal/identidadMisional/backend/src/routes/speaker.js" "~/code/personal/identidadMisional/backend/src/start.js" "~/code/personal/identidadMisional/backend/src/models/Speaker.js" "~/.config/fish/config.fish" "~/.config/fish/conf.d/omf.fish" "~/.config/fish/README.md" "~/.config/fish/.gitignore" "~/.config/fish/functions/fish_prompt.fish" "~/.config/fish/fishfile" "~/.config/fish/fishd.roger-pc" "~/.config/fish/fish_variables" "~/.config/fish/completions/fisher.fish" "~/.config/fish/functions/fish_prompt.1564151365.copy" "~/.config/fish/functions/fish_mode_prompt.fish" "~/.config/fish/functions/fish_right_prompt.fish" "~/.config/fish/functions/__sf_lib_section.fish" "~/.config/fish/functions/run-android.fish" "~/.hyper.js" "~/code/personal/identidadMisional/backend/.env.example" "~/code/personal/identidadMisional/backend/.env" "~/code/personal/identidadMisional/backend/src/docs/conference.yaml" "~/code/personal/identidadMisional/backend/src/models/Conference.js" "~/code/personal/identidadMisional/backend/.nycrc" "~/code/personal/identidadMisional/backend/src/docs/auth.yaml" "~/code/personal/identidadMisional/backend/src/docs/user.yaml" "~/code/personal/identidadMisional/backend/src/routes/conference.js" "~/code/vascar/knac/knacBackEnd/test/professionalProfile.test.js" "~/code/vascar/knac/knacBackEnd/handlers/common.js" "~/code/vascar/knac/knacBackEnd/routes/professionalsRoutes.js" "~/code/vascar/knac/knacBackEnd/controllers/professionalController.js" "~/code/vascar/knac/knacBackEnd/handlers/s3.js" "~/code/personal/identidadMisional/backend/test/conference.test.js" "~/code/personal/identidadMisional/backend/src/routes/unprotected.js" "~/code/personal/identidadMisional/backend/src/controllers/conference.js" "~/code/personal/cocacola/app/epics/PincodeEpic.js"))
+
+;; Buffer section -- buffers listed in same order as in buffer list:
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/init.el"
+  "init.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  29
+  '(917 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 26774 174176 487000) (buffer-file-coding-system . utf-8-unix))
+  '((mark-ring (917 917 917 917 917 905 889 862 831 806 780 183 176 67 17 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/core/rogs-packages.el"
+  "rogs-packages.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1731
+  '(1399 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 26774 174176 772000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (649 643 641 1688 1743 135 21 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/setup/setup-python-mode.el"
+  "setup-python-mode.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  194
+  '(148 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 26621 217583 405000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (148 223 234 11 147 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/setup/setup-yaml-mode.el"
+  "setup-yaml-mode.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1
+  '(455 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 26265 953369 368000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (143 11 141 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/setup/setup-flycheck-mode.el"
+  "setup-flycheck-mode.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1943
+  '(422 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 26212 24133 296000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (155 11 154 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/setup/setup-js-mode.el"
+  "setup-js-mode.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1
+  '(1971 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 25653 340148 502000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (137 115 39 11 135 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/setup/setup-web-mode.el"
+  "setup-web-mode.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1
+  '(2478 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 25564 492543 517000) (buffer-file-coding-system . prefer-utf-8-unix) (overwrite-mode))
+  '((mark-ring (2450 919 1482 1783 916 140 139 117 40 2430 5 1))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/core/rogs-ui.el"
+  "rogs-ui.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1
+  '(1536 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 25340 37448 248000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (1441 1389 1332 1535 1 1212 1262 1151 1025 950 819 774 674 116 672 244))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/core/rogs-core.el"
+  "rogs-core.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  4246
+  '(4246 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 25340 37448 116000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (4246 4187 4155 426 4153 4114 4112 4060 1618 1575 1537 740 658 1411 1079 961))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/core/rogs-keybindings.el"
+  "rogs-keybindings.el"
+  'emacs-lisp-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1385
+  '(1181 nil)
+  nil
+  nil
+  '((buffer-display-time 23871 25015 146466 289000) (buffer-file-coding-system . prefer-utf-8-unix))
+  '((mark-ring (1163 899 875 780 764 384 369 315 275 265 143 142 37 5 1360 1349))))
+
+(desktop-create-buffer 208
+  "/home/roger/.emacs.d/README.md"
+  "README.md"
+  'markdown-mode
+  '(eldoc-mode global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode projectile-mode)
+  1613
+  '(1569 nil)
+  nil
+  nil
+  '((tab-width . 4) (buffer-display-time 23871 22743 128855 535000) (buffer-file-coding-system . undecided-unix))
+  '((mark-ring (1569 1561 1453 1447 1443 1392 1375 1444 1372 1308))))
+
+(desktop-create-buffer 208
+  "/home/roger/.config/fish/abbreviations.fish"
+  "abbreviations.fish"
+  'fundamental-mode
+  '(global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode linum-mode projectile-mode)
+  1883
+  '(nil nil)
+  nil
+  nil
+  '((buffer-display-time 23871 22205 208390 173000) (buffer-file-coding-system . undecided-unix))
+  '((mark-ring nil)))
+
+(desktop-create-buffer 208
+  "/home/roger/code/massive/cocacola/frontend/app/components/Walkthrough.js"
+  "Walkthrough.js"
+  'rjsx-mode
+  '(global-auto-revert-mode magit-file-mode whitespace-cleanup-mode yas-minor-mode flycheck-mode linum-mode js2-refactor-mode company-mode tern-mode projectile-mode indium-interaction-mode prettier-js-mode emmet-mode)
+  1
+  '(nil nil)
+  nil
+  nil
+  '((buffer-display-time 23871 24789 846121 337000) (buffer-file-coding-system . undecided-unix))
+  '((mark-ring nil)))
+
diff --git a/.emacs.d.back/.gitignore b/.emacs.d.back/.gitignore
new file mode 100644
index 00000000..1b30fbc4
--- /dev/null
+++ b/.emacs.d.back/.gitignore
@@ -0,0 +1,7 @@
+/ac-comphist.dat
+*.~
+/session.10e52146f73178410e1471006235648400000010320032
+/org-clock-save.el
+/init.el~
+auto-save-list/
+elpa/
diff --git a/.emacs.d.back/.mc-lists.el b/.emacs.d.back/.mc-lists.el
new file mode 100644
index 00000000..8f72bb3c
--- /dev/null
+++ b/.emacs.d.back/.mc-lists.el
@@ -0,0 +1,24 @@
+;; This file is automatically generated by the multiple-cursors extension.
+;; It keeps track of your preferences for running commands with multiple cursors.
+
+(setq mc/cmds-to-run-for-all
+      '(
+        electric-pair-delete-pair
+        elpy-nav-backward-indent
+        elpy-nav-forward-indent
+        helm-M-x
+        indent-for-tab-command
+        js2r-kill
+        magit-status
+        org-cycle
+        org-self-insert-command
+        query-replace
+        rjsx-electric-gt
+        rjsx-electric-lt
+        ))
+
+(setq mc/cmds-to-run-once
+      '(
+        helm-find-files
+        kill-region
+        ))
diff --git a/.emacs.d.back/.python-environments/default/bin/activate b/.emacs.d.back/.python-environments/default/bin/activate
new file mode 100644
index 00000000..9f2cb3ae
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/activate
@@ -0,0 +1,78 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+deactivate () {
+    unset -f pydoc >/dev/null 2>&1
+
+    # reset old environment variables
+    # ! [ -z ${VAR+_} ] returns true if VAR is declared at all
+    if ! [ -z "${_OLD_VIRTUAL_PATH+_}" ] ; then
+        PATH="$_OLD_VIRTUAL_PATH"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if ! [ -z "${_OLD_VIRTUAL_PYTHONHOME+_}" ] ; then
+        PYTHONHOME="$_OLD_VIRTUAL_PYTHONHOME"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
+        hash -r 2>/dev/null
+    fi
+
+    if ! [ -z "${_OLD_VIRTUAL_PS1+_}" ] ; then
+        PS1="$_OLD_VIRTUAL_PS1"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    if [ ! "${1-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/home/roger/.emacs.d/.python-environments/default"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+if ! [ -z "${PYTHONHOME+_}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="$PYTHONHOME"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT-}" ] ; then
+    _OLD_VIRTUAL_PS1="$PS1"
+    if [ "x" != x ] ; then
+        PS1="$PS1"
+    else
+        PS1="(`basename \"$VIRTUAL_ENV\"`) $PS1"
+    fi
+    export PS1
+fi
+
+# Make sure to unalias pydoc if it's already there
+alias pydoc 2>/dev/null >/dev/null && unalias pydoc
+
+pydoc () {
+    python -m pydoc "$@"
+}
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
+    hash -r 2>/dev/null
+fi
diff --git a/.emacs.d.back/.python-environments/default/bin/activate.csh b/.emacs.d.back/.python-environments/default/bin/activate.csh
new file mode 100644
index 00000000..05d44b60
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/activate.csh
@@ -0,0 +1,42 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+
+set newline='\
+'
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH:q" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT:q" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate && unalias pydoc'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/home/roger/.emacs.d/.python-environments/default"
+
+set _OLD_VIRTUAL_PATH="$PATH:q"
+setenv PATH "$VIRTUAL_ENV:q/bin:$PATH:q"
+
+
+
+if ("" != "") then
+    set env_name = ""
+else
+    set env_name = "$VIRTUAL_ENV:t:q"
+endif
+
+# Could be in a non-interactive environment,
+# in which case, $prompt is undefined and we wouldn't
+# care about the prompt anyway.
+if ( $?prompt ) then
+    set _OLD_VIRTUAL_PROMPT="$prompt:q"
+if ( "$prompt:q" =~ *"$newline:q"* ) then
+    :
+else
+    set prompt = "[$env_name:q] $prompt:q"
+endif
+endif
+
+unset env_name
+
+alias pydoc python -m pydoc
+
+rehash
diff --git a/.emacs.d.back/.python-environments/default/bin/activate.fish b/.emacs.d.back/.python-environments/default/bin/activate.fish
new file mode 100644
index 00000000..aedeec77
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/activate.fish
@@ -0,0 +1,76 @@
+# This file must be used using `source bin/activate.fish` *within a running fish ( http://fishshell.com ) session*.
+# Do not run it directly.
+
+function deactivate -d 'Exit virtualenv mode and return to the normal environment.'
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
+    end
+
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+        # Set an empty local `$fish_function_path` to allow the removal of `fish_prompt` using `functions -e`.
+        set -l fish_function_path
+
+        # Erase virtualenv's `fish_prompt` and restore the original.
+        functions -e fish_prompt
+        functions -c _old_fish_prompt fish_prompt
+        functions -e _old_fish_prompt
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+    end
+
+    set -e VIRTUAL_ENV
+
+    if test "$argv[1]" != 'nondestructive'
+        # Self-destruct!
+        functions -e pydoc
+        functions -e deactivate
+    end
+end
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/home/roger/.emacs.d/.python-environments/default"
+
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# Unset `$PYTHONHOME` if set.
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+function pydoc
+    python -m pydoc $argv
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # Copy the current `fish_prompt` function as `_old_fish_prompt`.
+    functions -c fish_prompt _old_fish_prompt
+
+    function fish_prompt
+        # Save the current $status, for fish_prompts that display it.
+        set -l old_status $status
+
+        # Prompt override provided?
+        # If not, just prepend the environment name.
+        if test -n ""
+            printf '%s%s' "" (set_color normal)
+        else
+            printf '%s(%s) ' (set_color normal) (basename "$VIRTUAL_ENV")
+        end
+
+        # Restore the original $status
+        echo "exit $old_status" | source
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+end
diff --git a/.emacs.d.back/.python-environments/default/bin/activate.ps1 b/.emacs.d.back/.python-environments/default/bin/activate.ps1
new file mode 100644
index 00000000..89dbec6c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/activate.ps1
@@ -0,0 +1,150 @@
+# This file must be dot sourced from PoSh; you cannot run it

+# directly. Do this: . ./activate.ps1

+

+# FIXME: clean up unused vars.

+$script:THIS_PATH = $myinvocation.mycommand.path

+$script:BASE_DIR = split-path (resolve-path "$THIS_PATH/..") -Parent

+$script:DIR_NAME = split-path $BASE_DIR -Leaf

+

+function global:deactivate ( [switch] $NonDestructive ){

+

+    if ( test-path variable:_OLD_VIRTUAL_PATH ) {

+        $env:PATH = $variable:_OLD_VIRTUAL_PATH

+        remove-variable "_OLD_VIRTUAL_PATH" -scope global

+    }

+

+    if ( test-path function:_old_virtual_prompt ) {

+        $function:prompt = $function:_old_virtual_prompt

+        remove-item function:\_old_virtual_prompt

+    }

+

+    if ($env:VIRTUAL_ENV) {

+        $old_env = split-path $env:VIRTUAL_ENV -leaf

+        remove-item env:VIRTUAL_ENV -erroraction silentlycontinue

+    }

+

+    if ( !$NonDestructive ) {

+        # Self destruct!

+        remove-item function:deactivate

+    }

+}

+

+# unset irrelevant variables

+deactivate -nondestructive

+

+$VIRTUAL_ENV = $BASE_DIR

+$env:VIRTUAL_ENV = $VIRTUAL_ENV

+

+$global:_OLD_VIRTUAL_PATH = $env:PATH

+$env:PATH = "$env:VIRTUAL_ENV/bin:" + $env:PATH

+if (! $env:VIRTUAL_ENV_DISABLE_PROMPT) {

+    function global:_old_virtual_prompt { "" }

+    $function:_old_virtual_prompt = $function:prompt

+    function global:prompt {

+        # Add a prefix to the current prompt, but don't discard it.

+        write-host "($(split-path $env:VIRTUAL_ENV -leaf)) " -nonewline

+        & $function:_old_virtual_prompt

+    }

+}

+

+# SIG # Begin signature block

+# MIISeAYJKoZIhvcNAQcCoIISaTCCEmUCAQExCzAJBgUrDgMCGgUAMGkGCisGAQQB

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+# xkNCx+6PsrA5Z7WP4pXcmYnMn97npP/Q9EHJWw==

+# SIG # End signature block

diff --git a/.emacs.d.back/.python-environments/default/bin/activate_this.py b/.emacs.d.back/.python-environments/default/bin/activate_this.py
new file mode 100644
index 00000000..444d3fd3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/activate_this.py
@@ -0,0 +1,36 @@
+"""By using execfile(this_file, dict(__file__=this_file)) you will
+activate this virtualenv environment.
+
+This can be used when you must use an existing Python interpreter, not
+the virtualenv bin/python
+"""
+
+try:
+    __file__
+except NameError:
+    raise AssertionError(
+        "You must run this like execfile('path/to/activate_this.py', dict(__file__='path/to/activate_this.py'))"
+    )
+import os
+import site
+import sys
+
+old_os_path = os.environ.get("PATH", "")
+os.environ["PATH"] = os.path.dirname(os.path.abspath(__file__)) + os.pathsep + old_os_path
+base = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if sys.platform == "win32":
+    site_packages = os.path.join(base, "Lib", "site-packages")
+else:
+    site_packages = os.path.join(base, "lib", "python%s" % sys.version[:3], "site-packages")
+prev_sys_path = list(sys.path)
+
+site.addsitedir(site_packages)
+sys.real_prefix = sys.prefix
+sys.prefix = base
+# Move the added items to the front of the path:
+new_sys_path = []
+for item in list(sys.path):
+    if item not in prev_sys_path:
+        new_sys_path.append(item)
+        sys.path.remove(item)
+sys.path[:0] = new_sys_path
diff --git a/.emacs.d.back/.python-environments/default/bin/easy_install b/.emacs.d.back/.python-environments/default/bin/easy_install
new file mode 100755
index 00000000..dfdbac82
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/easy_install
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from setuptools.command.easy_install import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/easy_install-3.7 b/.emacs.d.back/.python-environments/default/bin/easy_install-3.7
new file mode 100755
index 00000000..dfdbac82
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/easy_install-3.7
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from setuptools.command.easy_install import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/jediepcserver b/.emacs.d.back/.python-environments/default/bin/jediepcserver
new file mode 100755
index 00000000..88c236db
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/jediepcserver
@@ -0,0 +1,10 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from jediepcserver import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/pip b/.emacs.d.back/.python-environments/default/bin/pip
new file mode 100755
index 00000000..8d940696
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/pip
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/pip3 b/.emacs.d.back/.python-environments/default/bin/pip3
new file mode 100755
index 00000000..8d940696
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/pip3
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/pip3.7 b/.emacs.d.back/.python-environments/default/bin/pip3.7
new file mode 100755
index 00000000..8d940696
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/pip3.7
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/bin/python b/.emacs.d.back/.python-environments/default/bin/python
new file mode 100755
index 00000000..14b75f36
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/python
diff --git a/.emacs.d.back/.python-environments/default/bin/python-config b/.emacs.d.back/.python-environments/default/bin/python-config
new file mode 100755
index 00000000..341344d7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/python-config
@@ -0,0 +1,78 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+import sys
+import getopt
+import sysconfig
+
+valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags',
+              'ldflags', 'help']
+
+if sys.version_info >= (3, 2):
+    valid_opts.insert(-1, 'extension-suffix')
+    valid_opts.append('abiflags')
+if sys.version_info >= (3, 3):
+    valid_opts.append('configdir')
+
+
+def exit_with_usage(code=1):
+    sys.stderr.write("Usage: {0} [{1}]\n".format(
+        sys.argv[0], '|'.join('--'+opt for opt in valid_opts)))
+    sys.exit(code)
+
+try:
+    opts, args = getopt.getopt(sys.argv[1:], '', valid_opts)
+except getopt.error:
+    exit_with_usage()
+
+if not opts:
+    exit_with_usage()
+
+pyver = sysconfig.get_config_var('VERSION')
+getvar = sysconfig.get_config_var
+
+opt_flags = [flag for (flag, val) in opts]
+
+if '--help' in opt_flags:
+    exit_with_usage(code=0)
+
+for opt in opt_flags:
+    if opt == '--prefix':
+        print(sysconfig.get_config_var('prefix'))
+
+    elif opt == '--exec-prefix':
+        print(sysconfig.get_config_var('exec_prefix'))
+
+    elif opt in ('--includes', '--cflags'):
+        flags = ['-I' + sysconfig.get_path('include'),
+                 '-I' + sysconfig.get_path('platinclude')]
+        if opt == '--cflags':
+            flags.extend(getvar('CFLAGS').split())
+        print(' '.join(flags))
+
+    elif opt in ('--libs', '--ldflags'):
+        abiflags = getattr(sys, 'abiflags', '')
+        libs = ['-lpython' + pyver + abiflags]
+        libs += getvar('LIBS').split()
+        libs += getvar('SYSLIBS').split()
+        # add the prefix/lib/pythonX.Y/config dir, but only if there is no
+        # shared library in prefix/lib/.
+        if opt == '--ldflags':
+            if not getvar('Py_ENABLE_SHARED'):
+                libs.insert(0, '-L' + getvar('LIBPL'))
+            if not getvar('PYTHONFRAMEWORK'):
+                libs.extend(getvar('LINKFORSHARED').split())
+        print(' '.join(libs))
+
+    elif opt == '--extension-suffix':
+        ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
+        if ext_suffix is None:
+            ext_suffix = sysconfig.get_config_var('SO')
+        print(ext_suffix)
+
+    elif opt == '--abiflags':
+        if not getattr(sys, 'abiflags', None):
+            exit_with_usage()
+        print(sys.abiflags)
+
+    elif opt == '--configdir':
+        print(sysconfig.get_config_var('LIBPL'))
diff --git a/.emacs.d.back/.python-environments/default/bin/python3 b/.emacs.d.back/.python-environments/default/bin/python3
new file mode 120000
index 00000000..d8654aa0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/python3
@@ -0,0 +1 @@
+python
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/bin/python3.7 b/.emacs.d.back/.python-environments/default/bin/python3.7
new file mode 120000
index 00000000..d8654aa0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/python3.7
@@ -0,0 +1 @@
+python
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/bin/wheel b/.emacs.d.back/.python-environments/default/bin/wheel
new file mode 100755
index 00000000..ea0fa745
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/bin/wheel
@@ -0,0 +1,11 @@
+#!/home/roger/.emacs.d/.python-environments/default/bin/python
+
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from wheel.cli import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/include/python3.7m b/.emacs.d.back/.python-environments/default/include/python3.7m
new file mode 120000
index 00000000..4fe7f6cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/include/python3.7m
@@ -0,0 +1 @@
+/usr/include/python3.7m
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__future__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/__future__.py
new file mode 120000
index 00000000..f8b4fc85
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__future__.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/__future__.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/__future__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/__future__.cpython-37.pyc
new file mode 100644
index 00000000..82705cd0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/__future__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_bootlocale.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_bootlocale.cpython-37.pyc
new file mode 100644
index 00000000..1fedd552
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_bootlocale.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_collections_abc.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_collections_abc.cpython-37.pyc
new file mode 100644
index 00000000..45bb3dc2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_collections_abc.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_weakrefset.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_weakrefset.cpython-37.pyc
new file mode 100644
index 00000000..ead4e6a6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/_weakrefset.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/abc.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/abc.cpython-37.pyc
new file mode 100644
index 00000000..63b782f5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/abc.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/base64.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/base64.cpython-37.pyc
new file mode 100644
index 00000000..c0c36c42
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/base64.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/bisect.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/bisect.cpython-37.pyc
new file mode 100644
index 00000000..a980af34
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/bisect.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/codecs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/codecs.cpython-37.pyc
new file mode 100644
index 00000000..2f620361
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/codecs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copy.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copy.cpython-37.pyc
new file mode 100644
index 00000000..4d284e0a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copy.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copyreg.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copyreg.cpython-37.pyc
new file mode 100644
index 00000000..a19c8a71
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/copyreg.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/enum.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/enum.cpython-37.pyc
new file mode 100644
index 00000000..7c26c510
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/enum.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/fnmatch.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/fnmatch.cpython-37.pyc
new file mode 100644
index 00000000..6a72db75
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/fnmatch.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/functools.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/functools.cpython-37.pyc
new file mode 100644
index 00000000..d71c743e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/functools.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/genericpath.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/genericpath.cpython-37.pyc
new file mode 100644
index 00000000..4ab54e65
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/genericpath.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hashlib.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hashlib.cpython-37.pyc
new file mode 100644
index 00000000..bbc08aab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hashlib.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/heapq.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/heapq.cpython-37.pyc
new file mode 100644
index 00000000..03280f42
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/heapq.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hmac.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hmac.cpython-37.pyc
new file mode 100644
index 00000000..ea6f4b03
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/hmac.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/imp.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/imp.cpython-37.pyc
new file mode 100644
index 00000000..78ba678c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/imp.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/io.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/io.cpython-37.pyc
new file mode 100644
index 00000000..470a1557
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/io.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/keyword.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/keyword.cpython-37.pyc
new file mode 100644
index 00000000..f04607aa
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/keyword.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/linecache.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/linecache.cpython-37.pyc
new file mode 100644
index 00000000..f9e0800d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/linecache.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/locale.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/locale.cpython-37.pyc
new file mode 100644
index 00000000..8e6cd3c7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/locale.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/ntpath.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/ntpath.cpython-37.pyc
new file mode 100644
index 00000000..956d2601
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/ntpath.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/operator.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/operator.cpython-37.pyc
new file mode 100644
index 00000000..89ac28f9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/operator.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/os.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/os.cpython-37.pyc
new file mode 100644
index 00000000..6a549e0c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/os.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/posixpath.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/posixpath.cpython-37.pyc
new file mode 100644
index 00000000..2b5e5990
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/posixpath.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/random.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/random.cpython-37.pyc
new file mode 100644
index 00000000..3bc01a1d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/random.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/re.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/re.cpython-37.pyc
new file mode 100644
index 00000000..5291d144
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/re.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/reprlib.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/reprlib.cpython-37.pyc
new file mode 100644
index 00000000..70729c33
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/reprlib.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/shutil.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/shutil.cpython-37.pyc
new file mode 100644
index 00000000..984297a4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/shutil.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/site.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/site.cpython-37.pyc
new file mode 100644
index 00000000..2d8c9a41
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/site.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_compile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_compile.cpython-37.pyc
new file mode 100644
index 00000000..18772455
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_compile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_constants.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_constants.cpython-37.pyc
new file mode 100644
index 00000000..8805b5fc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_constants.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_parse.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_parse.cpython-37.pyc
new file mode 100644
index 00000000..4538fc20
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/sre_parse.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/stat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/stat.cpython-37.pyc
new file mode 100644
index 00000000..3b28e9e4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/stat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/struct.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/struct.cpython-37.pyc
new file mode 100644
index 00000000..d3c22809
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/struct.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tarfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tarfile.cpython-37.pyc
new file mode 100644
index 00000000..40cb1405
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tarfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tempfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tempfile.cpython-37.pyc
new file mode 100644
index 00000000..a3bad96a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tempfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/token.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/token.cpython-37.pyc
new file mode 100644
index 00000000..7a7945ca
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/token.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tokenize.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tokenize.cpython-37.pyc
new file mode 100644
index 00000000..de3e1721
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/tokenize.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/types.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/types.cpython-37.pyc
new file mode 100644
index 00000000..2794f744
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/types.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/warnings.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/warnings.cpython-37.pyc
new file mode 100644
index 00000000..41a8b9df
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/warnings.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/weakref.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/weakref.cpython-37.pyc
new file mode 100644
index 00000000..99eef1f7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/__pycache__/weakref.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/_bootlocale.py b/.emacs.d.back/.python-environments/default/lib/python3.7/_bootlocale.py
new file mode 120000
index 00000000..e04cb131
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/_bootlocale.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/_bootlocale.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/_collections_abc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/_collections_abc.py
new file mode 120000
index 00000000..e72b3998
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/_collections_abc.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/_collections_abc.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/_dummy_thread.py b/.emacs.d.back/.python-environments/default/lib/python3.7/_dummy_thread.py
new file mode 120000
index 00000000..ef6d8b09
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/_dummy_thread.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/_dummy_thread.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/_weakrefset.py b/.emacs.d.back/.python-environments/default/lib/python3.7/_weakrefset.py
new file mode 120000
index 00000000..922c8c50
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/_weakrefset.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/_weakrefset.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/abc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/abc.py
new file mode 120000
index 00000000..f95e00f0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/abc.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/abc.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/base64.py b/.emacs.d.back/.python-environments/default/lib/python3.7/base64.py
new file mode 120000
index 00000000..5a53c06a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/base64.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/base64.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/bisect.py b/.emacs.d.back/.python-environments/default/lib/python3.7/bisect.py
new file mode 120000
index 00000000..06caa654
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/bisect.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/bisect.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/codecs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/codecs.py
new file mode 120000
index 00000000..06b45200
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/codecs.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/codecs.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/collections b/.emacs.d.back/.python-environments/default/lib/python3.7/collections
new file mode 120000
index 00000000..9b59f262
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/collections
@@ -0,0 +1 @@
+/usr/lib/python3.7/collections
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/config-3.7m-x86_64-linux-gnu b/.emacs.d.back/.python-environments/default/lib/python3.7/config-3.7m-x86_64-linux-gnu
new file mode 120000
index 00000000..9e6ede4a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/config-3.7m-x86_64-linux-gnu
@@ -0,0 +1 @@
+/usr/lib/python3.7/config-3.7m-x86_64-linux-gnu
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/copy.py b/.emacs.d.back/.python-environments/default/lib/python3.7/copy.py
new file mode 120000
index 00000000..3c1771fb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/copy.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/copy.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/copyreg.py b/.emacs.d.back/.python-environments/default/lib/python3.7/copyreg.py
new file mode 120000
index 00000000..f1c47ed2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/copyreg.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/copyreg.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__init__.py
new file mode 100644
index 00000000..59f55f17
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__init__.py
@@ -0,0 +1,116 @@
+import imp
+import os
+import sys
+import warnings
+
+# opcode is not a virtualenv module, so we can use it to find the stdlib
+# Important! To work on pypy, this must be a module that resides in the
+# lib-python/modified-x.y.z directory
+import opcode
+
+dirname = os.path.dirname
+
+distutils_path = os.path.join(os.path.dirname(opcode.__file__), "distutils")
+if os.path.normpath(distutils_path) == os.path.dirname(os.path.normpath(__file__)):
+    warnings.warn("The virtualenv distutils package at %s appears to be in the same location as the system distutils?")
+else:
+    __path__.insert(0, distutils_path)  # noqa: F821
+    real_distutils = imp.load_module("_virtualenv_distutils", None, distutils_path, ("", "", imp.PKG_DIRECTORY))
+    # Copy the relevant attributes
+    try:
+        __revision__ = real_distutils.__revision__
+    except AttributeError:
+        pass
+    __version__ = real_distutils.__version__
+
+from distutils import dist, sysconfig  # isort:skip
+
+try:
+    basestring
+except NameError:
+    basestring = str
+
+# patch build_ext (distutils doesn't know how to get the libs directory
+# path on windows - it hardcodes the paths around the patched sys.prefix)
+
+if sys.platform == "win32":
+    from distutils.command.build_ext import build_ext as old_build_ext
+
+    class build_ext(old_build_ext):
+        def finalize_options(self):
+            if self.library_dirs is None:
+                self.library_dirs = []
+            elif isinstance(self.library_dirs, basestring):
+                self.library_dirs = self.library_dirs.split(os.pathsep)
+
+            self.library_dirs.insert(0, os.path.join(sys.real_prefix, "Libs"))
+            old_build_ext.finalize_options(self)
+
+    from distutils.command import build_ext as build_ext_module
+
+    build_ext_module.build_ext = build_ext
+
+# distutils.dist patches:
+
+old_find_config_files = dist.Distribution.find_config_files
+
+
+def find_config_files(self):
+    found = old_find_config_files(self)
+    if os.name == "posix":
+        user_filename = ".pydistutils.cfg"
+    else:
+        user_filename = "pydistutils.cfg"
+    user_filename = os.path.join(sys.prefix, user_filename)
+    if os.path.isfile(user_filename):
+        for item in list(found):
+            if item.endswith("pydistutils.cfg"):
+                found.remove(item)
+        found.append(user_filename)
+    return found
+
+
+dist.Distribution.find_config_files = find_config_files
+
+# distutils.sysconfig patches:
+
+old_get_python_inc = sysconfig.get_python_inc
+
+
+def sysconfig_get_python_inc(plat_specific=0, prefix=None):
+    if prefix is None:
+        prefix = sys.real_prefix
+    return old_get_python_inc(plat_specific, prefix)
+
+
+sysconfig_get_python_inc.__doc__ = old_get_python_inc.__doc__
+sysconfig.get_python_inc = sysconfig_get_python_inc
+
+old_get_python_lib = sysconfig.get_python_lib
+
+
+def sysconfig_get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
+    if standard_lib and prefix is None:
+        prefix = sys.real_prefix
+    return old_get_python_lib(plat_specific, standard_lib, prefix)
+
+
+sysconfig_get_python_lib.__doc__ = old_get_python_lib.__doc__
+sysconfig.get_python_lib = sysconfig_get_python_lib
+
+old_get_config_vars = sysconfig.get_config_vars
+
+
+def sysconfig_get_config_vars(*args):
+    real_vars = old_get_config_vars(*args)
+    if sys.platform == "win32":
+        lib_dir = os.path.join(sys.real_prefix, "libs")
+        if isinstance(real_vars, dict) and "LIBDIR" not in real_vars:
+            real_vars["LIBDIR"] = lib_dir  # asked for all
+        elif isinstance(real_vars, list) and "LIBDIR" in args:
+            real_vars = real_vars + [lib_dir]  # asked for list
+    return real_vars
+
+
+sysconfig_get_config_vars.__doc__ = old_get_config_vars.__doc__
+sysconfig.get_config_vars = sysconfig_get_config_vars
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..352f3794
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/distutils.cfg b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/distutils.cfg
new file mode 100644
index 00000000..1af230ec
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/distutils/distutils.cfg
@@ -0,0 +1,6 @@
+# This is a config file local to this virtualenv installation
+# You may include options that will be used by all distutils commands,
+# and by easy_install.  For instance:
+#
+#   [easy_install]
+#   find_links = http://mylocalsite
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/encodings b/.emacs.d.back/.python-environments/default/lib/python3.7/encodings
new file mode 120000
index 00000000..bc6d310f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/encodings
@@ -0,0 +1 @@
+/usr/lib/python3.7/encodings
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/enum.py b/.emacs.d.back/.python-environments/default/lib/python3.7/enum.py
new file mode 120000
index 00000000..77ccb8a1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/enum.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/enum.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/fnmatch.py b/.emacs.d.back/.python-environments/default/lib/python3.7/fnmatch.py
new file mode 120000
index 00000000..2063ce7e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/fnmatch.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/fnmatch.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/functools.py b/.emacs.d.back/.python-environments/default/lib/python3.7/functools.py
new file mode 120000
index 00000000..516834e9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/functools.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/functools.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/genericpath.py b/.emacs.d.back/.python-environments/default/lib/python3.7/genericpath.py
new file mode 120000
index 00000000..56b95567
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/genericpath.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/genericpath.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/hashlib.py b/.emacs.d.back/.python-environments/default/lib/python3.7/hashlib.py
new file mode 120000
index 00000000..90e4cebb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/hashlib.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/hashlib.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/heapq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/heapq.py
new file mode 120000
index 00000000..3c076dc0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/heapq.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/heapq.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/hmac.py b/.emacs.d.back/.python-environments/default/lib/python3.7/hmac.py
new file mode 120000
index 00000000..57e88c32
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/hmac.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/hmac.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/imp.py b/.emacs.d.back/.python-environments/default/lib/python3.7/imp.py
new file mode 120000
index 00000000..56ec73e2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/imp.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/imp.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/importlib b/.emacs.d.back/.python-environments/default/lib/python3.7/importlib
new file mode 120000
index 00000000..4c5f4cab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/importlib
@@ -0,0 +1 @@
+/usr/lib/python3.7/importlib
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/io.py b/.emacs.d.back/.python-environments/default/lib/python3.7/io.py
new file mode 120000
index 00000000..339c8173
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/io.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/io.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/keyword.py b/.emacs.d.back/.python-environments/default/lib/python3.7/keyword.py
new file mode 120000
index 00000000..af7e802e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/keyword.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/keyword.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/lib-dynload b/.emacs.d.back/.python-environments/default/lib/python3.7/lib-dynload
new file mode 120000
index 00000000..12d11dbd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/lib-dynload
@@ -0,0 +1 @@
+/usr/lib/python3.7/lib-dynload
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/linecache.py b/.emacs.d.back/.python-environments/default/lib/python3.7/linecache.py
new file mode 120000
index 00000000..fa0de008
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/linecache.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/linecache.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/locale.py b/.emacs.d.back/.python-environments/default/lib/python3.7/locale.py
new file mode 120000
index 00000000..1742884a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/locale.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/locale.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/ntpath.py b/.emacs.d.back/.python-environments/default/lib/python3.7/ntpath.py
new file mode 120000
index 00000000..ac3e5993
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/ntpath.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/ntpath.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/operator.py b/.emacs.d.back/.python-environments/default/lib/python3.7/operator.py
new file mode 120000
index 00000000..20aa91f7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/operator.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/operator.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/orig-prefix.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/orig-prefix.txt
new file mode 100644
index 00000000..e25db584
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/orig-prefix.txt
@@ -0,0 +1 @@
+/usr
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/os.py b/.emacs.d.back/.python-environments/default/lib/python3.7/os.py
new file mode 120000
index 00000000..3f4e638f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/os.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/os.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/posixpath.py b/.emacs.d.back/.python-environments/default/lib/python3.7/posixpath.py
new file mode 120000
index 00000000..fae2a64b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/posixpath.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/posixpath.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/random.py b/.emacs.d.back/.python-environments/default/lib/python3.7/random.py
new file mode 120000
index 00000000..904f9fab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/random.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/random.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/re.py b/.emacs.d.back/.python-environments/default/lib/python3.7/re.py
new file mode 120000
index 00000000..f92bf343
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/re.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/re.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/reprlib.py b/.emacs.d.back/.python-environments/default/lib/python3.7/reprlib.py
new file mode 120000
index 00000000..26e0a419
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/reprlib.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/reprlib.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/rlcompleter.py b/.emacs.d.back/.python-environments/default/lib/python3.7/rlcompleter.py
new file mode 120000
index 00000000..a823cd0d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/rlcompleter.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/rlcompleter.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/shutil.py b/.emacs.d.back/.python-environments/default/lib/python3.7/shutil.py
new file mode 120000
index 00000000..c2f4a485
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/shutil.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/shutil.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/argparse.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/argparse.cpython-37.pyc
new file mode 100644
index 00000000..1cc6a8cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/argparse.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/easy_install.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/easy_install.cpython-37.pyc
new file mode 100644
index 00000000..7864bfef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/easy_install.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/jediepcserver.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/jediepcserver.cpython-37.pyc
new file mode 100644
index 00000000..46da46c8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/jediepcserver.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/sexpdata.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/sexpdata.cpython-37.pyc
new file mode 100644
index 00000000..82674e97
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/__pycache__/sexpdata.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/DESCRIPTION.rst b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/DESCRIPTION.rst
new file mode 100644
index 00000000..12865ff4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/DESCRIPTION.rst
@@ -0,0 +1,55 @@
+The argparse module makes it easy to write user friendly command line
+interfaces.
+
+The program defines what arguments it requires, and argparse will figure out
+how to parse those out of sys.argv. The argparse module also automatically
+generates help and usage messages and issues errors when users give the
+program invalid arguments.
+
+As of Python >= 2.7 and >= 3.2, the argparse module is maintained within the
+Python standard library. For users who still need to support Python < 2.7 or
+< 3.2, it is also provided as a separate package, which tries to stay
+compatible with the module in the standard library, but also supports older
+Python versions.
+
+Also, we can fix bugs here for users who are stuck on some non-current python
+version, like e.g. 3.2.3 (which has bugs that were fixed in a later 3.2.x
+release).
+
+argparse is licensed under the Python license, for details see LICENSE.txt.
+
+
+Compatibility
+-------------
+
+argparse should work on Python >= 2.3, it was tested on:
+
+* 2.3, 2.4, 2.5, 2.6 and 2.7
+* 3.1, 3.2, 3.3, 3.4
+
+
+Installation
+------------
+
+Try one of these:
+
+    python setup.py install
+
+    easy_install argparse
+
+    pip install argparse
+
+    putting argparse.py in some directory listed in sys.path should also work
+
+
+Bugs
+----
+
+If you find a bug in argparse (pypi), please try to reproduce it with latest
+python 2.7 and 3.4 (and use argparse from stdlib).
+
+If it happens there also, please file a bug in the python.org issue tracker.
+If it does not happen there, file a bug in the argparse package issue tracker.
+
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/METADATA
new file mode 100644
index 00000000..ade3c7fb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/METADATA
@@ -0,0 +1,85 @@
+Metadata-Version: 2.0
+Name: argparse
+Version: 1.4.0
+Summary: Python command-line parsing library
+Home-page: https://github.com/ThomasWaldmann/argparse/
+Author: Thomas Waldmann
+Author-email: tw@waldmann-edv.de
+License: Python Software Foundation License
+Keywords: argparse command line parser parsing
+Platform: any
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Console
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: Python Software Foundation License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 2.3
+Classifier: Programming Language :: Python :: 2.4
+Classifier: Programming Language :: Python :: 2.5
+Classifier: Programming Language :: Python :: 2.6
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3.0
+Classifier: Programming Language :: Python :: 3.1
+Classifier: Programming Language :: Python :: 3.2
+Classifier: Programming Language :: Python :: 3.3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Topic :: Software Development
+
+The argparse module makes it easy to write user friendly command line
+interfaces.
+
+The program defines what arguments it requires, and argparse will figure out
+how to parse those out of sys.argv. The argparse module also automatically
+generates help and usage messages and issues errors when users give the
+program invalid arguments.
+
+As of Python >= 2.7 and >= 3.2, the argparse module is maintained within the
+Python standard library. For users who still need to support Python < 2.7 or
+< 3.2, it is also provided as a separate package, which tries to stay
+compatible with the module in the standard library, but also supports older
+Python versions.
+
+Also, we can fix bugs here for users who are stuck on some non-current python
+version, like e.g. 3.2.3 (which has bugs that were fixed in a later 3.2.x
+release).
+
+argparse is licensed under the Python license, for details see LICENSE.txt.
+
+
+Compatibility
+-------------
+
+argparse should work on Python >= 2.3, it was tested on:
+
+* 2.3, 2.4, 2.5, 2.6 and 2.7
+* 3.1, 3.2, 3.3, 3.4
+
+
+Installation
+------------
+
+Try one of these:
+
+    python setup.py install
+
+    easy_install argparse
+
+    pip install argparse
+
+    putting argparse.py in some directory listed in sys.path should also work
+
+
+Bugs
+----
+
+If you find a bug in argparse (pypi), please try to reproduce it with latest
+python 2.7 and 3.4 (and use argparse from stdlib).
+
+If it happens there also, please file a bug in the python.org issue tracker.
+If it does not happen there, file a bug in the argparse package issue tracker.
+
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/RECORD
new file mode 100644
index 00000000..a1c72301
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/RECORD
@@ -0,0 +1,9 @@
+__pycache__/argparse.cpython-37.pyc,,

+argparse-1.4.0.dist-info/DESCRIPTION.rst,sha256=_wSTTIamPdyREfSSHUtRDgL0u1f2cU-fG3tufgwj928,1540

+argparse-1.4.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4

+argparse-1.4.0.dist-info/METADATA,sha256=OVnr-7fAoUh5C7TqU-N_xmXD03JcaNjN31Q-wUitpN8,2792

+argparse-1.4.0.dist-info/RECORD,,

+argparse-1.4.0.dist-info/WHEEL,sha256=AvR0WeTpDaxT645bl5FQxUK6NPsTls2ttpcGJg3j1Xg,110

+argparse-1.4.0.dist-info/metadata.json,sha256=6BBrwOpKwMyufJMx0uLeBk18dogzU8O2YgTUSJHYlXA,1326

+argparse-1.4.0.dist-info/top_level.txt,sha256=TgiWrQsF0mKWwqS2KHLORD0ZtqYHPRGdCAAzKwtVvJ4,9

+argparse.py,sha256=0ksYqisQDQvhoiuo19JERCSpg51tc641GFJIx7pTA0g,89214

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/WHEEL
new file mode 100644
index 00000000..9dff69d8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.24.0)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/metadata.json b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/metadata.json
new file mode 100644
index 00000000..156ccbef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/metadata.json
@@ -0,0 +1 @@
+{"license": "Python Software Foundation License", "name": "argparse", "metadata_version": "2.0", "generator": "bdist_wheel (0.24.0)", "summary": "Python command-line parsing library", "platform": "any", "version": "1.4.0", "extensions": {"python.details": {"project_urls": {"Home": "https://github.com/ThomasWaldmann/argparse/"}, "document_names": {"description": "DESCRIPTION.rst"}, "contacts": [{"role": "author", "email": "tw@waldmann-edv.de", "name": "Thomas Waldmann"}]}}, "keywords": ["argparse", "command", "line", "parser", "parsing"], "classifiers": ["Development Status :: 5 - Production/Stable", "Environment :: Console", "Intended Audience :: Developers", "License :: OSI Approved :: Python Software Foundation License", "Operating System :: OS Independent", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 3", "Programming Language :: Python :: 2.3", "Programming Language :: Python :: 2.4", "Programming Language :: Python :: 2.5", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3.0", "Programming Language :: Python :: 3.1", "Programming Language :: Python :: 3.2", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Topic :: Software Development"]}
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/top_level.txt
new file mode 100644
index 00000000..1352d5e6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse-1.4.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+argparse
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse.py
new file mode 100644
index 00000000..70a77cc0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/argparse.py
@@ -0,0 +1,2392 @@
+# Author: Steven J. Bethard <steven.bethard@gmail.com>.
+# Maintainer: Thomas Waldmann <tw@waldmann-edv.de>
+
+"""Command-line parsing library
+
+This module is an optparse-inspired command-line parsing library that:
+
+    - handles both optional and positional arguments
+    - produces highly informative usage messages
+    - supports parsers that dispatch to sub-parsers
+
+The following is a simple usage example that sums integers from the
+command-line and writes the result to a file::
+
+    parser = argparse.ArgumentParser(
+        description='sum the integers at the command line')
+    parser.add_argument(
+        'integers', metavar='int', nargs='+', type=int,
+        help='an integer to be summed')
+    parser.add_argument(
+        '--log', default=sys.stdout, type=argparse.FileType('w'),
+        help='the file where the sum should be written')
+    args = parser.parse_args()
+    args.log.write('%s' % sum(args.integers))
+    args.log.close()
+
+The module contains the following public classes:
+
+    - ArgumentParser -- The main entry point for command-line parsing. As the
+        example above shows, the add_argument() method is used to populate
+        the parser with actions for optional and positional arguments. Then
+        the parse_args() method is invoked to convert the args at the
+        command-line into an object with attributes.
+
+    - ArgumentError -- The exception raised by ArgumentParser objects when
+        there are errors with the parser's actions. Errors raised while
+        parsing the command-line are caught by ArgumentParser and emitted
+        as command-line messages.
+
+    - FileType -- A factory for defining types of files to be created. As the
+        example above shows, instances of FileType are typically passed as
+        the type= argument of add_argument() calls.
+
+    - Action -- The base class for parser actions. Typically actions are
+        selected by passing strings like 'store_true' or 'append_const' to
+        the action= argument of add_argument(). However, for greater
+        customization of ArgumentParser actions, subclasses of Action may
+        be defined and passed as the action= argument.
+
+    - HelpFormatter, RawDescriptionHelpFormatter, RawTextHelpFormatter,
+        ArgumentDefaultsHelpFormatter -- Formatter classes which
+        may be passed as the formatter_class= argument to the
+        ArgumentParser constructor. HelpFormatter is the default,
+        RawDescriptionHelpFormatter and RawTextHelpFormatter tell the parser
+        not to change the formatting for help text, and
+        ArgumentDefaultsHelpFormatter adds information about argument defaults
+        to the help.
+
+All other classes in this module are considered implementation details.
+(Also note that HelpFormatter and RawDescriptionHelpFormatter are only
+considered public as object names -- the API of the formatter objects is
+still considered an implementation detail.)
+"""
+
+__version__ = '1.4.0'  # we use our own version number independant of the
+                       # one in stdlib and we release this on pypi.
+
+__external_lib__ = True  # to make sure the tests really test THIS lib,
+                         # not the builtin one in Python stdlib
+
+__all__ = [
+    'ArgumentParser',
+    'ArgumentError',
+    'ArgumentTypeError',
+    'FileType',
+    'HelpFormatter',
+    'ArgumentDefaultsHelpFormatter',
+    'RawDescriptionHelpFormatter',
+    'RawTextHelpFormatter',
+    'Namespace',
+    'Action',
+    'ONE_OR_MORE',
+    'OPTIONAL',
+    'PARSER',
+    'REMAINDER',
+    'SUPPRESS',
+    'ZERO_OR_MORE',
+]
+
+
+import copy as _copy
+import os as _os
+import re as _re
+import sys as _sys
+import textwrap as _textwrap
+
+from gettext import gettext as _
+
+try:
+    set
+except NameError:
+    # for python < 2.4 compatibility (sets module is there since 2.3):
+    from sets import Set as set
+
+try:
+    basestring
+except NameError:
+    basestring = str
+
+try:
+    sorted
+except NameError:
+    # for python < 2.4 compatibility:
+    def sorted(iterable, reverse=False):
+        result = list(iterable)
+        result.sort()
+        if reverse:
+            result.reverse()
+        return result
+
+
+def _callable(obj):
+    return hasattr(obj, '__call__') or hasattr(obj, '__bases__')
+
+
+SUPPRESS = '==SUPPRESS=='
+
+OPTIONAL = '?'
+ZERO_OR_MORE = '*'
+ONE_OR_MORE = '+'
+PARSER = 'A...'
+REMAINDER = '...'
+_UNRECOGNIZED_ARGS_ATTR = '_unrecognized_args'
+
+# =============================
+# Utility functions and classes
+# =============================
+
+class _AttributeHolder(object):
+    """Abstract base class that provides __repr__.
+
+    The __repr__ method returns a string in the format::
+        ClassName(attr=name, attr=name, ...)
+    The attributes are determined either by a class-level attribute,
+    '_kwarg_names', or by inspecting the instance __dict__.
+    """
+
+    def __repr__(self):
+        type_name = type(self).__name__
+        arg_strings = []
+        for arg in self._get_args():
+            arg_strings.append(repr(arg))
+        for name, value in self._get_kwargs():
+            arg_strings.append('%s=%r' % (name, value))
+        return '%s(%s)' % (type_name, ', '.join(arg_strings))
+
+    def _get_kwargs(self):
+        return sorted(self.__dict__.items())
+
+    def _get_args(self):
+        return []
+
+
+def _ensure_value(namespace, name, value):
+    if getattr(namespace, name, None) is None:
+        setattr(namespace, name, value)
+    return getattr(namespace, name)
+
+
+# ===============
+# Formatting Help
+# ===============
+
+class HelpFormatter(object):
+    """Formatter for generating usage messages and argument help strings.
+
+    Only the name of this class is considered a public API. All the methods
+    provided by the class are considered an implementation detail.
+    """
+
+    def __init__(self,
+                 prog,
+                 indent_increment=2,
+                 max_help_position=24,
+                 width=None):
+
+        # default setting for width
+        if width is None:
+            try:
+                width = int(_os.environ['COLUMNS'])
+            except (KeyError, ValueError):
+                width = 80
+            width -= 2
+
+        self._prog = prog
+        self._indent_increment = indent_increment
+        self._max_help_position = max_help_position
+        self._width = width
+
+        self._current_indent = 0
+        self._level = 0
+        self._action_max_length = 0
+
+        self._root_section = self._Section(self, None)
+        self._current_section = self._root_section
+
+        self._whitespace_matcher = _re.compile(r'\s+')
+        self._long_break_matcher = _re.compile(r'\n\n\n+')
+
+    # ===============================
+    # Section and indentation methods
+    # ===============================
+    def _indent(self):
+        self._current_indent += self._indent_increment
+        self._level += 1
+
+    def _dedent(self):
+        self._current_indent -= self._indent_increment
+        assert self._current_indent >= 0, 'Indent decreased below 0.'
+        self._level -= 1
+
+    class _Section(object):
+
+        def __init__(self, formatter, parent, heading=None):
+            self.formatter = formatter
+            self.parent = parent
+            self.heading = heading
+            self.items = []
+
+        def format_help(self):
+            # format the indented section
+            if self.parent is not None:
+                self.formatter._indent()
+            join = self.formatter._join_parts
+            for func, args in self.items:
+                func(*args)
+            item_help = join([func(*args) for func, args in self.items])
+            if self.parent is not None:
+                self.formatter._dedent()
+
+            # return nothing if the section was empty
+            if not item_help:
+                return ''
+
+            # add the heading if the section was non-empty
+            if self.heading is not SUPPRESS and self.heading is not None:
+                current_indent = self.formatter._current_indent
+                heading = '%*s%s:\n' % (current_indent, '', self.heading)
+            else:
+                heading = ''
+
+            # join the section-initial newline, the heading and the help
+            return join(['\n', heading, item_help, '\n'])
+
+    def _add_item(self, func, args):
+        self._current_section.items.append((func, args))
+
+    # ========================
+    # Message building methods
+    # ========================
+    def start_section(self, heading):
+        self._indent()
+        section = self._Section(self, self._current_section, heading)
+        self._add_item(section.format_help, [])
+        self._current_section = section
+
+    def end_section(self):
+        self._current_section = self._current_section.parent
+        self._dedent()
+
+    def add_text(self, text):
+        if text is not SUPPRESS and text is not None:
+            self._add_item(self._format_text, [text])
+
+    def add_usage(self, usage, actions, groups, prefix=None):
+        if usage is not SUPPRESS:
+            args = usage, actions, groups, prefix
+            self._add_item(self._format_usage, args)
+
+    def add_argument(self, action):
+        if action.help is not SUPPRESS:
+
+            # find all invocations
+            get_invocation = self._format_action_invocation
+            invocations = [get_invocation(action)]
+            for subaction in self._iter_indented_subactions(action):
+                invocations.append(get_invocation(subaction))
+
+            # update the maximum item length
+            invocation_length = max([len(s) for s in invocations])
+            action_length = invocation_length + self._current_indent
+            self._action_max_length = max(self._action_max_length,
+                                          action_length)
+
+            # add the item to the list
+            self._add_item(self._format_action, [action])
+
+    def add_arguments(self, actions):
+        for action in actions:
+            self.add_argument(action)
+
+    # =======================
+    # Help-formatting methods
+    # =======================
+    def format_help(self):
+        help = self._root_section.format_help()
+        if help:
+            help = self._long_break_matcher.sub('\n\n', help)
+            help = help.strip('\n') + '\n'
+        return help
+
+    def _join_parts(self, part_strings):
+        return ''.join([part
+                        for part in part_strings
+                        if part and part is not SUPPRESS])
+
+    def _format_usage(self, usage, actions, groups, prefix):
+        if prefix is None:
+            prefix = _('usage: ')
+
+        # if usage is specified, use that
+        if usage is not None:
+            usage = usage % dict(prog=self._prog)
+
+        # if no optionals or positionals are available, usage is just prog
+        elif usage is None and not actions:
+            usage = '%(prog)s' % dict(prog=self._prog)
+
+        # if optionals and positionals are available, calculate usage
+        elif usage is None:
+            prog = '%(prog)s' % dict(prog=self._prog)
+
+            # split optionals from positionals
+            optionals = []
+            positionals = []
+            for action in actions:
+                if action.option_strings:
+                    optionals.append(action)
+                else:
+                    positionals.append(action)
+
+            # build full usage string
+            format = self._format_actions_usage
+            action_usage = format(optionals + positionals, groups)
+            usage = ' '.join([s for s in [prog, action_usage] if s])
+
+            # wrap the usage parts if it's too long
+            text_width = self._width - self._current_indent
+            if len(prefix) + len(usage) > text_width:
+
+                # break usage into wrappable parts
+                part_regexp = r'\(.*?\)+|\[.*?\]+|\S+'
+                opt_usage = format(optionals, groups)
+                pos_usage = format(positionals, groups)
+                opt_parts = _re.findall(part_regexp, opt_usage)
+                pos_parts = _re.findall(part_regexp, pos_usage)
+                assert ' '.join(opt_parts) == opt_usage
+                assert ' '.join(pos_parts) == pos_usage
+
+                # helper for wrapping lines
+                def get_lines(parts, indent, prefix=None):
+                    lines = []
+                    line = []
+                    if prefix is not None:
+                        line_len = len(prefix) - 1
+                    else:
+                        line_len = len(indent) - 1
+                    for part in parts:
+                        if line_len + 1 + len(part) > text_width:
+                            lines.append(indent + ' '.join(line))
+                            line = []
+                            line_len = len(indent) - 1
+                        line.append(part)
+                        line_len += len(part) + 1
+                    if line:
+                        lines.append(indent + ' '.join(line))
+                    if prefix is not None:
+                        lines[0] = lines[0][len(indent):]
+                    return lines
+
+                # if prog is short, follow it with optionals or positionals
+                if len(prefix) + len(prog) <= 0.75 * text_width:
+                    indent = ' ' * (len(prefix) + len(prog) + 1)
+                    if opt_parts:
+                        lines = get_lines([prog] + opt_parts, indent, prefix)
+                        lines.extend(get_lines(pos_parts, indent))
+                    elif pos_parts:
+                        lines = get_lines([prog] + pos_parts, indent, prefix)
+                    else:
+                        lines = [prog]
+
+                # if prog is long, put it on its own line
+                else:
+                    indent = ' ' * len(prefix)
+                    parts = opt_parts + pos_parts
+                    lines = get_lines(parts, indent)
+                    if len(lines) > 1:
+                        lines = []
+                        lines.extend(get_lines(opt_parts, indent))
+                        lines.extend(get_lines(pos_parts, indent))
+                    lines = [prog] + lines
+
+                # join lines into usage
+                usage = '\n'.join(lines)
+
+        # prefix with 'usage:'
+        return '%s%s\n\n' % (prefix, usage)
+
+    def _format_actions_usage(self, actions, groups):
+        # find group indices and identify actions in groups
+        group_actions = set()
+        inserts = {}
+        for group in groups:
+            try:
+                start = actions.index(group._group_actions[0])
+            except ValueError:
+                continue
+            else:
+                end = start + len(group._group_actions)
+                if actions[start:end] == group._group_actions:
+                    for action in group._group_actions:
+                        group_actions.add(action)
+                    if not group.required:
+                        if start in inserts:
+                            inserts[start] += ' ['
+                        else:
+                            inserts[start] = '['
+                        inserts[end] = ']'
+                    else:
+                        if start in inserts:
+                            inserts[start] += ' ('
+                        else:
+                            inserts[start] = '('
+                        inserts[end] = ')'
+                    for i in range(start + 1, end):
+                        inserts[i] = '|'
+
+        # collect all actions format strings
+        parts = []
+        for i, action in enumerate(actions):
+
+            # suppressed arguments are marked with None
+            # remove | separators for suppressed arguments
+            if action.help is SUPPRESS:
+                parts.append(None)
+                if inserts.get(i) == '|':
+                    inserts.pop(i)
+                elif inserts.get(i + 1) == '|':
+                    inserts.pop(i + 1)
+
+            # produce all arg strings
+            elif not action.option_strings:
+                part = self._format_args(action, action.dest)
+
+                # if it's in a group, strip the outer []
+                if action in group_actions:
+                    if part[0] == '[' and part[-1] == ']':
+                        part = part[1:-1]
+
+                # add the action string to the list
+                parts.append(part)
+
+            # produce the first way to invoke the option in brackets
+            else:
+                option_string = action.option_strings[0]
+
+                # if the Optional doesn't take a value, format is:
+                #    -s or --long
+                if action.nargs == 0:
+                    part = '%s' % option_string
+
+                # if the Optional takes a value, format is:
+                #    -s ARGS or --long ARGS
+                else:
+                    default = action.dest.upper()
+                    args_string = self._format_args(action, default)
+                    part = '%s %s' % (option_string, args_string)
+
+                # make it look optional if it's not required or in a group
+                if not action.required and action not in group_actions:
+                    part = '[%s]' % part
+
+                # add the action string to the list
+                parts.append(part)
+
+        # insert things at the necessary indices
+        for i in sorted(inserts, reverse=True):
+            parts[i:i] = [inserts[i]]
+
+        # join all the action items with spaces
+        text = ' '.join([item for item in parts if item is not None])
+
+        # clean up separators for mutually exclusive groups
+        open = r'[\[(]'
+        close = r'[\])]'
+        text = _re.sub(r'(%s) ' % open, r'\1', text)
+        text = _re.sub(r' (%s)' % close, r'\1', text)
+        text = _re.sub(r'%s *%s' % (open, close), r'', text)
+        text = _re.sub(r'\(([^|]*)\)', r'\1', text)
+        text = text.strip()
+
+        # return the text
+        return text
+
+    def _format_text(self, text):
+        if '%(prog)' in text:
+            text = text % dict(prog=self._prog)
+        text_width = self._width - self._current_indent
+        indent = ' ' * self._current_indent
+        return self._fill_text(text, text_width, indent) + '\n\n'
+
+    def _format_action(self, action):
+        # determine the required width and the entry label
+        help_position = min(self._action_max_length + 2,
+                            self._max_help_position)
+        help_width = self._width - help_position
+        action_width = help_position - self._current_indent - 2
+        action_header = self._format_action_invocation(action)
+
+        # ho nelp; start on same line and add a final newline
+        if not action.help:
+            tup = self._current_indent, '', action_header
+            action_header = '%*s%s\n' % tup
+
+        # short action name; start on the same line and pad two spaces
+        elif len(action_header) <= action_width:
+            tup = self._current_indent, '', action_width, action_header
+            action_header = '%*s%-*s  ' % tup
+            indent_first = 0
+
+        # long action name; start on the next line
+        else:
+            tup = self._current_indent, '', action_header
+            action_header = '%*s%s\n' % tup
+            indent_first = help_position
+
+        # collect the pieces of the action help
+        parts = [action_header]
+
+        # if there was help for the action, add lines of help text
+        if action.help:
+            help_text = self._expand_help(action)
+            help_lines = self._split_lines(help_text, help_width)
+            parts.append('%*s%s\n' % (indent_first, '', help_lines[0]))
+            for line in help_lines[1:]:
+                parts.append('%*s%s\n' % (help_position, '', line))
+
+        # or add a newline if the description doesn't end with one
+        elif not action_header.endswith('\n'):
+            parts.append('\n')
+
+        # if there are any sub-actions, add their help as well
+        for subaction in self._iter_indented_subactions(action):
+            parts.append(self._format_action(subaction))
+
+        # return a single string
+        return self._join_parts(parts)
+
+    def _format_action_invocation(self, action):
+        if not action.option_strings:
+            metavar, = self._metavar_formatter(action, action.dest)(1)
+            return metavar
+
+        else:
+            parts = []
+
+            # if the Optional doesn't take a value, format is:
+            #    -s, --long
+            if action.nargs == 0:
+                parts.extend(action.option_strings)
+
+            # if the Optional takes a value, format is:
+            #    -s ARGS, --long ARGS
+            else:
+                default = action.dest.upper()
+                args_string = self._format_args(action, default)
+                for option_string in action.option_strings:
+                    parts.append('%s %s' % (option_string, args_string))
+
+            return ', '.join(parts)
+
+    def _metavar_formatter(self, action, default_metavar):
+        if action.metavar is not None:
+            result = action.metavar
+        elif action.choices is not None:
+            choice_strs = [str(choice) for choice in action.choices]
+            result = '{%s}' % ','.join(choice_strs)
+        else:
+            result = default_metavar
+
+        def format(tuple_size):
+            if isinstance(result, tuple):
+                return result
+            else:
+                return (result, ) * tuple_size
+        return format
+
+    def _format_args(self, action, default_metavar):
+        get_metavar = self._metavar_formatter(action, default_metavar)
+        if action.nargs is None:
+            result = '%s' % get_metavar(1)
+        elif action.nargs == OPTIONAL:
+            result = '[%s]' % get_metavar(1)
+        elif action.nargs == ZERO_OR_MORE:
+            result = '[%s [%s ...]]' % get_metavar(2)
+        elif action.nargs == ONE_OR_MORE:
+            result = '%s [%s ...]' % get_metavar(2)
+        elif action.nargs == REMAINDER:
+            result = '...'
+        elif action.nargs == PARSER:
+            result = '%s ...' % get_metavar(1)
+        else:
+            formats = ['%s' for _ in range(action.nargs)]
+            result = ' '.join(formats) % get_metavar(action.nargs)
+        return result
+
+    def _expand_help(self, action):
+        params = dict(vars(action), prog=self._prog)
+        for name in list(params):
+            if params[name] is SUPPRESS:
+                del params[name]
+        for name in list(params):
+            if hasattr(params[name], '__name__'):
+                params[name] = params[name].__name__
+        if params.get('choices') is not None:
+            choices_str = ', '.join([str(c) for c in params['choices']])
+            params['choices'] = choices_str
+        return self._get_help_string(action) % params
+
+    def _iter_indented_subactions(self, action):
+        try:
+            get_subactions = action._get_subactions
+        except AttributeError:
+            pass
+        else:
+            self._indent()
+            for subaction in get_subactions():
+                yield subaction
+            self._dedent()
+
+    def _split_lines(self, text, width):
+        text = self._whitespace_matcher.sub(' ', text).strip()
+        return _textwrap.wrap(text, width)
+
+    def _fill_text(self, text, width, indent):
+        text = self._whitespace_matcher.sub(' ', text).strip()
+        return _textwrap.fill(text, width, initial_indent=indent,
+                                           subsequent_indent=indent)
+
+    def _get_help_string(self, action):
+        return action.help
+
+
+class RawDescriptionHelpFormatter(HelpFormatter):
+    """Help message formatter which retains any formatting in descriptions.
+
+    Only the name of this class is considered a public API. All the methods
+    provided by the class are considered an implementation detail.
+    """
+
+    def _fill_text(self, text, width, indent):
+        return ''.join([indent + line for line in text.splitlines(True)])
+
+
+class RawTextHelpFormatter(RawDescriptionHelpFormatter):
+    """Help message formatter which retains formatting of all help text.
+
+    Only the name of this class is considered a public API. All the methods
+    provided by the class are considered an implementation detail.
+    """
+
+    def _split_lines(self, text, width):
+        return text.splitlines()
+
+
+class ArgumentDefaultsHelpFormatter(HelpFormatter):
+    """Help message formatter which adds default values to argument help.
+
+    Only the name of this class is considered a public API. All the methods
+    provided by the class are considered an implementation detail.
+    """
+
+    def _get_help_string(self, action):
+        help = action.help
+        if '%(default)' not in action.help:
+            if action.default is not SUPPRESS:
+                defaulting_nargs = [OPTIONAL, ZERO_OR_MORE]
+                if action.option_strings or action.nargs in defaulting_nargs:
+                    help += ' (default: %(default)s)'
+        return help
+
+
+# =====================
+# Options and Arguments
+# =====================
+
+def _get_action_name(argument):
+    if argument is None:
+        return None
+    elif argument.option_strings:
+        return  '/'.join(argument.option_strings)
+    elif argument.metavar not in (None, SUPPRESS):
+        return argument.metavar
+    elif argument.dest not in (None, SUPPRESS):
+        return argument.dest
+    else:
+        return None
+
+
+class ArgumentError(Exception):
+    """An error from creating or using an argument (optional or positional).
+
+    The string value of this exception is the message, augmented with
+    information about the argument that caused it.
+    """
+
+    def __init__(self, argument, message):
+        self.argument_name = _get_action_name(argument)
+        self.message = message
+
+    def __str__(self):
+        if self.argument_name is None:
+            format = '%(message)s'
+        else:
+            format = 'argument %(argument_name)s: %(message)s'
+        return format % dict(message=self.message,
+                             argument_name=self.argument_name)
+
+
+class ArgumentTypeError(Exception):
+    """An error from trying to convert a command line string to a type."""
+    pass
+
+
+# ==============
+# Action classes
+# ==============
+
+class Action(_AttributeHolder):
+    """Information about how to convert command line strings to Python objects.
+
+    Action objects are used by an ArgumentParser to represent the information
+    needed to parse a single argument from one or more strings from the
+    command line. The keyword arguments to the Action constructor are also
+    all attributes of Action instances.
+
+    Keyword Arguments:
+
+        - option_strings -- A list of command-line option strings which
+            should be associated with this action.
+
+        - dest -- The name of the attribute to hold the created object(s)
+
+        - nargs -- The number of command-line arguments that should be
+            consumed. By default, one argument will be consumed and a single
+            value will be produced.  Other values include:
+                - N (an integer) consumes N arguments (and produces a list)
+                - '?' consumes zero or one arguments
+                - '*' consumes zero or more arguments (and produces a list)
+                - '+' consumes one or more arguments (and produces a list)
+            Note that the difference between the default and nargs=1 is that
+            with the default, a single value will be produced, while with
+            nargs=1, a list containing a single value will be produced.
+
+        - const -- The value to be produced if the option is specified and the
+            option uses an action that takes no values.
+
+        - default -- The value to be produced if the option is not specified.
+
+        - type -- The type which the command-line arguments should be converted
+            to, should be one of 'string', 'int', 'float', 'complex' or a
+            callable object that accepts a single string argument. If None,
+            'string' is assumed.
+
+        - choices -- A container of values that should be allowed. If not None,
+            after a command-line argument has been converted to the appropriate
+            type, an exception will be raised if it is not a member of this
+            collection.
+
+        - required -- True if the action must always be specified at the
+            command line. This is only meaningful for optional command-line
+            arguments.
+
+        - help -- The help string describing the argument.
+
+        - metavar -- The name to be used for the option's argument with the
+            help string. If None, the 'dest' value will be used as the name.
+    """
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 nargs=None,
+                 const=None,
+                 default=None,
+                 type=None,
+                 choices=None,
+                 required=False,
+                 help=None,
+                 metavar=None):
+        self.option_strings = option_strings
+        self.dest = dest
+        self.nargs = nargs
+        self.const = const
+        self.default = default
+        self.type = type
+        self.choices = choices
+        self.required = required
+        self.help = help
+        self.metavar = metavar
+
+    def _get_kwargs(self):
+        names = [
+            'option_strings',
+            'dest',
+            'nargs',
+            'const',
+            'default',
+            'type',
+            'choices',
+            'help',
+            'metavar',
+        ]
+        return [(name, getattr(self, name)) for name in names]
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        raise NotImplementedError(_('.__call__() not defined'))
+
+
+class _StoreAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 nargs=None,
+                 const=None,
+                 default=None,
+                 type=None,
+                 choices=None,
+                 required=False,
+                 help=None,
+                 metavar=None):
+        if nargs == 0:
+            raise ValueError('nargs for store actions must be > 0; if you '
+                             'have nothing to store, actions such as store '
+                             'true or store const may be more appropriate')
+        if const is not None and nargs != OPTIONAL:
+            raise ValueError('nargs must be %r to supply const' % OPTIONAL)
+        super(_StoreAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=nargs,
+            const=const,
+            default=default,
+            type=type,
+            choices=choices,
+            required=required,
+            help=help,
+            metavar=metavar)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        setattr(namespace, self.dest, values)
+
+
+class _StoreConstAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 const,
+                 default=None,
+                 required=False,
+                 help=None,
+                 metavar=None):
+        super(_StoreConstAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            const=const,
+            default=default,
+            required=required,
+            help=help)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        setattr(namespace, self.dest, self.const)
+
+
+class _StoreTrueAction(_StoreConstAction):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 default=False,
+                 required=False,
+                 help=None):
+        super(_StoreTrueAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            const=True,
+            default=default,
+            required=required,
+            help=help)
+
+
+class _StoreFalseAction(_StoreConstAction):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 default=True,
+                 required=False,
+                 help=None):
+        super(_StoreFalseAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            const=False,
+            default=default,
+            required=required,
+            help=help)
+
+
+class _AppendAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 nargs=None,
+                 const=None,
+                 default=None,
+                 type=None,
+                 choices=None,
+                 required=False,
+                 help=None,
+                 metavar=None):
+        if nargs == 0:
+            raise ValueError('nargs for append actions must be > 0; if arg '
+                             'strings are not supplying the value to append, '
+                             'the append const action may be more appropriate')
+        if const is not None and nargs != OPTIONAL:
+            raise ValueError('nargs must be %r to supply const' % OPTIONAL)
+        super(_AppendAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=nargs,
+            const=const,
+            default=default,
+            type=type,
+            choices=choices,
+            required=required,
+            help=help,
+            metavar=metavar)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        items = _copy.copy(_ensure_value(namespace, self.dest, []))
+        items.append(values)
+        setattr(namespace, self.dest, items)
+
+
+class _AppendConstAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 const,
+                 default=None,
+                 required=False,
+                 help=None,
+                 metavar=None):
+        super(_AppendConstAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            const=const,
+            default=default,
+            required=required,
+            help=help,
+            metavar=metavar)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        items = _copy.copy(_ensure_value(namespace, self.dest, []))
+        items.append(self.const)
+        setattr(namespace, self.dest, items)
+
+
+class _CountAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest,
+                 default=None,
+                 required=False,
+                 help=None):
+        super(_CountAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            default=default,
+            required=required,
+            help=help)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        new_count = _ensure_value(namespace, self.dest, 0) + 1
+        setattr(namespace, self.dest, new_count)
+
+
+class _HelpAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 dest=SUPPRESS,
+                 default=SUPPRESS,
+                 help=None):
+        super(_HelpAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            default=default,
+            nargs=0,
+            help=help)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        parser.print_help()
+        parser.exit()
+
+
+class _VersionAction(Action):
+
+    def __init__(self,
+                 option_strings,
+                 version=None,
+                 dest=SUPPRESS,
+                 default=SUPPRESS,
+                 help="show program's version number and exit"):
+        super(_VersionAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            default=default,
+            nargs=0,
+            help=help)
+        self.version = version
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        version = self.version
+        if version is None:
+            version = parser.version
+        formatter = parser._get_formatter()
+        formatter.add_text(version)
+        parser.exit(message=formatter.format_help())
+
+
+class _SubParsersAction(Action):
+
+    class _ChoicesPseudoAction(Action):
+
+        def __init__(self, name, aliases, help):
+            metavar = dest = name
+            if aliases:
+                metavar += ' (%s)' % ', '.join(aliases)
+            sup = super(_SubParsersAction._ChoicesPseudoAction, self)
+            sup.__init__(option_strings=[], dest=dest, help=help,
+                        metavar=metavar)
+
+    def __init__(self,
+                 option_strings,
+                 prog,
+                 parser_class,
+                 dest=SUPPRESS,
+                 help=None,
+                 metavar=None):
+
+        self._prog_prefix = prog
+        self._parser_class = parser_class
+        self._name_parser_map = {}
+        self._choices_actions = []
+
+        super(_SubParsersAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=PARSER,
+            choices=self._name_parser_map,
+            help=help,
+            metavar=metavar)
+
+    def add_parser(self, name, **kwargs):
+        # set prog from the existing prefix
+        if kwargs.get('prog') is None:
+            kwargs['prog'] = '%s %s' % (self._prog_prefix, name)
+
+        aliases = kwargs.pop('aliases', ())
+
+        # create a pseudo-action to hold the choice help
+        if 'help' in kwargs:
+            help = kwargs.pop('help')
+            choice_action = self._ChoicesPseudoAction(name, aliases, help)
+            self._choices_actions.append(choice_action)
+
+        # create the parser and add it to the map
+        parser = self._parser_class(**kwargs)
+        self._name_parser_map[name] = parser
+
+        # make parser available under aliases also
+        for alias in aliases:
+            self._name_parser_map[alias] = parser
+
+        return parser
+
+    def _get_subactions(self):
+        return self._choices_actions
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        parser_name = values[0]
+        arg_strings = values[1:]
+
+        # set the parser name if requested
+        if self.dest is not SUPPRESS:
+            setattr(namespace, self.dest, parser_name)
+
+        # select the parser
+        try:
+            parser = self._name_parser_map[parser_name]
+        except KeyError:
+            tup = parser_name, ', '.join(self._name_parser_map)
+            msg = _('unknown parser %r (choices: %s)' % tup)
+            raise ArgumentError(self, msg)
+
+        # parse all the remaining options into the namespace
+        # store any unrecognized options on the object, so that the top
+        # level parser can decide what to do with them
+        namespace, arg_strings = parser.parse_known_args(arg_strings, namespace)
+        if arg_strings:
+            vars(namespace).setdefault(_UNRECOGNIZED_ARGS_ATTR, [])
+            getattr(namespace, _UNRECOGNIZED_ARGS_ATTR).extend(arg_strings)
+
+
+# ==============
+# Type classes
+# ==============
+
+class FileType(object):
+    """Factory for creating file object types
+
+    Instances of FileType are typically passed as type= arguments to the
+    ArgumentParser add_argument() method.
+
+    Keyword Arguments:
+        - mode -- A string indicating how the file is to be opened. Accepts the
+            same values as the builtin open() function.
+        - bufsize -- The file's desired buffer size. Accepts the same values as
+            the builtin open() function.
+    """
+
+    def __init__(self, mode='r', bufsize=None):
+        self._mode = mode
+        self._bufsize = bufsize
+
+    def __call__(self, string):
+        # the special argument "-" means sys.std{in,out}
+        if string == '-':
+            if 'r' in self._mode:
+                return _sys.stdin
+            elif 'w' in self._mode:
+                return _sys.stdout
+            else:
+                msg = _('argument "-" with mode %r' % self._mode)
+                raise ValueError(msg)
+
+        try:
+            # all other arguments are used as file names
+            if self._bufsize:
+                return open(string, self._mode, self._bufsize)
+            else:
+                return open(string, self._mode)
+        except IOError:
+            err = _sys.exc_info()[1]
+            message = _("can't open '%s': %s")
+            raise ArgumentTypeError(message % (string, err))
+
+    def __repr__(self):
+        args = [self._mode, self._bufsize]
+        args_str = ', '.join([repr(arg) for arg in args if arg is not None])
+        return '%s(%s)' % (type(self).__name__, args_str)
+
+# ===========================
+# Optional and Positional Parsing
+# ===========================
+
+class Namespace(_AttributeHolder):
+    """Simple object for storing attributes.
+
+    Implements equality by attribute names and values, and provides a simple
+    string representation.
+    """
+
+    def __init__(self, **kwargs):
+        for name in kwargs:
+            setattr(self, name, kwargs[name])
+
+    __hash__ = None
+
+    def __eq__(self, other):
+        return vars(self) == vars(other)
+
+    def __ne__(self, other):
+        return not (self == other)
+
+    def __contains__(self, key):
+        return key in self.__dict__
+
+
+class _ActionsContainer(object):
+
+    def __init__(self,
+                 description,
+                 prefix_chars,
+                 argument_default,
+                 conflict_handler):
+        super(_ActionsContainer, self).__init__()
+
+        self.description = description
+        self.argument_default = argument_default
+        self.prefix_chars = prefix_chars
+        self.conflict_handler = conflict_handler
+
+        # set up registries
+        self._registries = {}
+
+        # register actions
+        self.register('action', None, _StoreAction)
+        self.register('action', 'store', _StoreAction)
+        self.register('action', 'store_const', _StoreConstAction)
+        self.register('action', 'store_true', _StoreTrueAction)
+        self.register('action', 'store_false', _StoreFalseAction)
+        self.register('action', 'append', _AppendAction)
+        self.register('action', 'append_const', _AppendConstAction)
+        self.register('action', 'count', _CountAction)
+        self.register('action', 'help', _HelpAction)
+        self.register('action', 'version', _VersionAction)
+        self.register('action', 'parsers', _SubParsersAction)
+
+        # raise an exception if the conflict handler is invalid
+        self._get_handler()
+
+        # action storage
+        self._actions = []
+        self._option_string_actions = {}
+
+        # groups
+        self._action_groups = []
+        self._mutually_exclusive_groups = []
+
+        # defaults storage
+        self._defaults = {}
+
+        # determines whether an "option" looks like a negative number
+        self._negative_number_matcher = _re.compile(r'^-\d+$|^-\d*\.\d+$')
+
+        # whether or not there are any optionals that look like negative
+        # numbers -- uses a list so it can be shared and edited
+        self._has_negative_number_optionals = []
+
+    # ====================
+    # Registration methods
+    # ====================
+    def register(self, registry_name, value, object):
+        registry = self._registries.setdefault(registry_name, {})
+        registry[value] = object
+
+    def _registry_get(self, registry_name, value, default=None):
+        return self._registries[registry_name].get(value, default)
+
+    # ==================================
+    # Namespace default accessor methods
+    # ==================================
+    def set_defaults(self, **kwargs):
+        self._defaults.update(kwargs)
+
+        # if these defaults match any existing arguments, replace
+        # the previous default on the object with the new one
+        for action in self._actions:
+            if action.dest in kwargs:
+                action.default = kwargs[action.dest]
+
+    def get_default(self, dest):
+        for action in self._actions:
+            if action.dest == dest and action.default is not None:
+                return action.default
+        return self._defaults.get(dest, None)
+
+
+    # =======================
+    # Adding argument actions
+    # =======================
+    def add_argument(self, *args, **kwargs):
+        """
+        add_argument(dest, ..., name=value, ...)
+        add_argument(option_string, option_string, ..., name=value, ...)
+        """
+
+        # if no positional args are supplied or only one is supplied and
+        # it doesn't look like an option string, parse a positional
+        # argument
+        chars = self.prefix_chars
+        if not args or len(args) == 1 and args[0][0] not in chars:
+            if args and 'dest' in kwargs:
+                raise ValueError('dest supplied twice for positional argument')
+            kwargs = self._get_positional_kwargs(*args, **kwargs)
+
+        # otherwise, we're adding an optional argument
+        else:
+            kwargs = self._get_optional_kwargs(*args, **kwargs)
+
+        # if no default was supplied, use the parser-level default
+        if 'default' not in kwargs:
+            dest = kwargs['dest']
+            if dest in self._defaults:
+                kwargs['default'] = self._defaults[dest]
+            elif self.argument_default is not None:
+                kwargs['default'] = self.argument_default
+
+        # create the action object, and add it to the parser
+        action_class = self._pop_action_class(kwargs)
+        if not _callable(action_class):
+            raise ValueError('unknown action "%s"' % action_class)
+        action = action_class(**kwargs)
+
+        # raise an error if the action type is not callable
+        type_func = self._registry_get('type', action.type, action.type)
+        if not _callable(type_func):
+            raise ValueError('%r is not callable' % type_func)
+
+        return self._add_action(action)
+
+    def add_argument_group(self, *args, **kwargs):
+        group = _ArgumentGroup(self, *args, **kwargs)
+        self._action_groups.append(group)
+        return group
+
+    def add_mutually_exclusive_group(self, **kwargs):
+        group = _MutuallyExclusiveGroup(self, **kwargs)
+        self._mutually_exclusive_groups.append(group)
+        return group
+
+    def _add_action(self, action):
+        # resolve any conflicts
+        self._check_conflict(action)
+
+        # add to actions list
+        self._actions.append(action)
+        action.container = self
+
+        # index the action by any option strings it has
+        for option_string in action.option_strings:
+            self._option_string_actions[option_string] = action
+
+        # set the flag if any option strings look like negative numbers
+        for option_string in action.option_strings:
+            if self._negative_number_matcher.match(option_string):
+                if not self._has_negative_number_optionals:
+                    self._has_negative_number_optionals.append(True)
+
+        # return the created action
+        return action
+
+    def _remove_action(self, action):
+        self._actions.remove(action)
+
+    def _add_container_actions(self, container):
+        # collect groups by titles
+        title_group_map = {}
+        for group in self._action_groups:
+            if group.title in title_group_map:
+                msg = _('cannot merge actions - two groups are named %r')
+                raise ValueError(msg % (group.title))
+            title_group_map[group.title] = group
+
+        # map each action to its group
+        group_map = {}
+        for group in container._action_groups:
+
+            # if a group with the title exists, use that, otherwise
+            # create a new group matching the container's group
+            if group.title not in title_group_map:
+                title_group_map[group.title] = self.add_argument_group(
+                    title=group.title,
+                    description=group.description,
+                    conflict_handler=group.conflict_handler)
+
+            # map the actions to their new group
+            for action in group._group_actions:
+                group_map[action] = title_group_map[group.title]
+
+        # add container's mutually exclusive groups
+        # NOTE: if add_mutually_exclusive_group ever gains title= and
+        # description= then this code will need to be expanded as above
+        for group in container._mutually_exclusive_groups:
+            mutex_group = self.add_mutually_exclusive_group(
+                required=group.required)
+
+            # map the actions to their new mutex group
+            for action in group._group_actions:
+                group_map[action] = mutex_group
+
+        # add all actions to this container or their group
+        for action in container._actions:
+            group_map.get(action, self)._add_action(action)
+
+    def _get_positional_kwargs(self, dest, **kwargs):
+        # make sure required is not specified
+        if 'required' in kwargs:
+            msg = _("'required' is an invalid argument for positionals")
+            raise TypeError(msg)
+
+        # mark positional arguments as required if at least one is
+        # always required
+        if kwargs.get('nargs') not in [OPTIONAL, ZERO_OR_MORE]:
+            kwargs['required'] = True
+        if kwargs.get('nargs') == ZERO_OR_MORE and 'default' not in kwargs:
+            kwargs['required'] = True
+
+        # return the keyword arguments with no option strings
+        return dict(kwargs, dest=dest, option_strings=[])
+
+    def _get_optional_kwargs(self, *args, **kwargs):
+        # determine short and long option strings
+        option_strings = []
+        long_option_strings = []
+        for option_string in args:
+            # error on strings that don't start with an appropriate prefix
+            if not option_string[0] in self.prefix_chars:
+                msg = _('invalid option string %r: '
+                        'must start with a character %r')
+                tup = option_string, self.prefix_chars
+                raise ValueError(msg % tup)
+
+            # strings starting with two prefix characters are long options
+            option_strings.append(option_string)
+            if option_string[0] in self.prefix_chars:
+                if len(option_string) > 1:
+                    if option_string[1] in self.prefix_chars:
+                        long_option_strings.append(option_string)
+
+        # infer destination, '--foo-bar' -> 'foo_bar' and '-x' -> 'x'
+        dest = kwargs.pop('dest', None)
+        if dest is None:
+            if long_option_strings:
+                dest_option_string = long_option_strings[0]
+            else:
+                dest_option_string = option_strings[0]
+            dest = dest_option_string.lstrip(self.prefix_chars)
+            if not dest:
+                msg = _('dest= is required for options like %r')
+                raise ValueError(msg % option_string)
+            dest = dest.replace('-', '_')
+
+        # return the updated keyword arguments
+        return dict(kwargs, dest=dest, option_strings=option_strings)
+
+    def _pop_action_class(self, kwargs, default=None):
+        action = kwargs.pop('action', default)
+        return self._registry_get('action', action, action)
+
+    def _get_handler(self):
+        # determine function from conflict handler string
+        handler_func_name = '_handle_conflict_%s' % self.conflict_handler
+        try:
+            return getattr(self, handler_func_name)
+        except AttributeError:
+            msg = _('invalid conflict_resolution value: %r')
+            raise ValueError(msg % self.conflict_handler)
+
+    def _check_conflict(self, action):
+
+        # find all options that conflict with this option
+        confl_optionals = []
+        for option_string in action.option_strings:
+            if option_string in self._option_string_actions:
+                confl_optional = self._option_string_actions[option_string]
+                confl_optionals.append((option_string, confl_optional))
+
+        # resolve any conflicts
+        if confl_optionals:
+            conflict_handler = self._get_handler()
+            conflict_handler(action, confl_optionals)
+
+    def _handle_conflict_error(self, action, conflicting_actions):
+        message = _('conflicting option string(s): %s')
+        conflict_string = ', '.join([option_string
+                                     for option_string, action
+                                     in conflicting_actions])
+        raise ArgumentError(action, message % conflict_string)
+
+    def _handle_conflict_resolve(self, action, conflicting_actions):
+
+        # remove all conflicting options
+        for option_string, action in conflicting_actions:
+
+            # remove the conflicting option
+            action.option_strings.remove(option_string)
+            self._option_string_actions.pop(option_string, None)
+
+            # if the option now has no option string, remove it from the
+            # container holding it
+            if not action.option_strings:
+                action.container._remove_action(action)
+
+
+class _ArgumentGroup(_ActionsContainer):
+
+    def __init__(self, container, title=None, description=None, **kwargs):
+        # add any missing keyword arguments by checking the container
+        update = kwargs.setdefault
+        update('conflict_handler', container.conflict_handler)
+        update('prefix_chars', container.prefix_chars)
+        update('argument_default', container.argument_default)
+        super_init = super(_ArgumentGroup, self).__init__
+        super_init(description=description, **kwargs)
+
+        # group attributes
+        self.title = title
+        self._group_actions = []
+
+        # share most attributes with the container
+        self._registries = container._registries
+        self._actions = container._actions
+        self._option_string_actions = container._option_string_actions
+        self._defaults = container._defaults
+        self._has_negative_number_optionals = \
+            container._has_negative_number_optionals
+
+    def _add_action(self, action):
+        action = super(_ArgumentGroup, self)._add_action(action)
+        self._group_actions.append(action)
+        return action
+
+    def _remove_action(self, action):
+        super(_ArgumentGroup, self)._remove_action(action)
+        self._group_actions.remove(action)
+
+
+class _MutuallyExclusiveGroup(_ArgumentGroup):
+
+    def __init__(self, container, required=False):
+        super(_MutuallyExclusiveGroup, self).__init__(container)
+        self.required = required
+        self._container = container
+
+    def _add_action(self, action):
+        if action.required:
+            msg = _('mutually exclusive arguments must be optional')
+            raise ValueError(msg)
+        action = self._container._add_action(action)
+        self._group_actions.append(action)
+        return action
+
+    def _remove_action(self, action):
+        self._container._remove_action(action)
+        self._group_actions.remove(action)
+
+
+class ArgumentParser(_AttributeHolder, _ActionsContainer):
+    """Object for parsing command line strings into Python objects.
+
+    Keyword Arguments:
+        - prog -- The name of the program (default: sys.argv[0])
+        - usage -- A usage message (default: auto-generated from arguments)
+        - description -- A description of what the program does
+        - epilog -- Text following the argument descriptions
+        - parents -- Parsers whose arguments should be copied into this one
+        - formatter_class -- HelpFormatter class for printing help messages
+        - prefix_chars -- Characters that prefix optional arguments
+        - fromfile_prefix_chars -- Characters that prefix files containing
+            additional arguments
+        - argument_default -- The default value for all arguments
+        - conflict_handler -- String indicating how to handle conflicts
+        - add_help -- Add a -h/-help option
+    """
+
+    def __init__(self,
+                 prog=None,
+                 usage=None,
+                 description=None,
+                 epilog=None,
+                 version=None,
+                 parents=[],
+                 formatter_class=HelpFormatter,
+                 prefix_chars='-',
+                 fromfile_prefix_chars=None,
+                 argument_default=None,
+                 conflict_handler='error',
+                 add_help=True):
+
+        if version is not None:
+            import warnings
+            warnings.warn(
+                """The "version" argument to ArgumentParser is deprecated. """
+                """Please use """
+                """"add_argument(..., action='version', version="N", ...)" """
+                """instead""", DeprecationWarning)
+
+        superinit = super(ArgumentParser, self).__init__
+        superinit(description=description,
+                  prefix_chars=prefix_chars,
+                  argument_default=argument_default,
+                  conflict_handler=conflict_handler)
+
+        # default setting for prog
+        if prog is None:
+            prog = _os.path.basename(_sys.argv[0])
+
+        self.prog = prog
+        self.usage = usage
+        self.epilog = epilog
+        self.version = version
+        self.formatter_class = formatter_class
+        self.fromfile_prefix_chars = fromfile_prefix_chars
+        self.add_help = add_help
+
+        add_group = self.add_argument_group
+        self._positionals = add_group(_('positional arguments'))
+        self._optionals = add_group(_('optional arguments'))
+        self._subparsers = None
+
+        # register types
+        def identity(string):
+            return string
+        self.register('type', None, identity)
+
+        # add help and version arguments if necessary
+        # (using explicit default to override global argument_default)
+        if '-' in prefix_chars:
+            default_prefix = '-'
+        else:
+            default_prefix = prefix_chars[0]
+        if self.add_help:
+            self.add_argument(
+                default_prefix+'h', default_prefix*2+'help',
+                action='help', default=SUPPRESS,
+                help=_('show this help message and exit'))
+        if self.version:
+            self.add_argument(
+                default_prefix+'v', default_prefix*2+'version',
+                action='version', default=SUPPRESS,
+                version=self.version,
+                help=_("show program's version number and exit"))
+
+        # add parent arguments and defaults
+        for parent in parents:
+            self._add_container_actions(parent)
+            try:
+                defaults = parent._defaults
+            except AttributeError:
+                pass
+            else:
+                self._defaults.update(defaults)
+
+    # =======================
+    # Pretty __repr__ methods
+    # =======================
+    def _get_kwargs(self):
+        names = [
+            'prog',
+            'usage',
+            'description',
+            'version',
+            'formatter_class',
+            'conflict_handler',
+            'add_help',
+        ]
+        return [(name, getattr(self, name)) for name in names]
+
+    # ==================================
+    # Optional/Positional adding methods
+    # ==================================
+    def add_subparsers(self, **kwargs):
+        if self._subparsers is not None:
+            self.error(_('cannot have multiple subparser arguments'))
+
+        # add the parser class to the arguments if it's not present
+        kwargs.setdefault('parser_class', type(self))
+
+        if 'title' in kwargs or 'description' in kwargs:
+            title = _(kwargs.pop('title', 'subcommands'))
+            description = _(kwargs.pop('description', None))
+            self._subparsers = self.add_argument_group(title, description)
+        else:
+            self._subparsers = self._positionals
+
+        # prog defaults to the usage message of this parser, skipping
+        # optional arguments and with no "usage:" prefix
+        if kwargs.get('prog') is None:
+            formatter = self._get_formatter()
+            positionals = self._get_positional_actions()
+            groups = self._mutually_exclusive_groups
+            formatter.add_usage(self.usage, positionals, groups, '')
+            kwargs['prog'] = formatter.format_help().strip()
+
+        # create the parsers action and add it to the positionals list
+        parsers_class = self._pop_action_class(kwargs, 'parsers')
+        action = parsers_class(option_strings=[], **kwargs)
+        self._subparsers._add_action(action)
+
+        # return the created parsers action
+        return action
+
+    def _add_action(self, action):
+        if action.option_strings:
+            self._optionals._add_action(action)
+        else:
+            self._positionals._add_action(action)
+        return action
+
+    def _get_optional_actions(self):
+        return [action
+                for action in self._actions
+                if action.option_strings]
+
+    def _get_positional_actions(self):
+        return [action
+                for action in self._actions
+                if not action.option_strings]
+
+    # =====================================
+    # Command line argument parsing methods
+    # =====================================
+    def parse_args(self, args=None, namespace=None):
+        args, argv = self.parse_known_args(args, namespace)
+        if argv:
+            msg = _('unrecognized arguments: %s')
+            self.error(msg % ' '.join(argv))
+        return args
+
+    def parse_known_args(self, args=None, namespace=None):
+        # args default to the system args
+        if args is None:
+            args = _sys.argv[1:]
+
+        # default Namespace built from parser defaults
+        if namespace is None:
+            namespace = Namespace()
+
+        # add any action defaults that aren't present
+        for action in self._actions:
+            if action.dest is not SUPPRESS:
+                if not hasattr(namespace, action.dest):
+                    if action.default is not SUPPRESS:
+                        setattr(namespace, action.dest, action.default)
+
+        # add any parser defaults that aren't present
+        for dest in self._defaults:
+            if not hasattr(namespace, dest):
+                setattr(namespace, dest, self._defaults[dest])
+
+        # parse the arguments and exit if there are any errors
+        try:
+            namespace, args = self._parse_known_args(args, namespace)
+            if hasattr(namespace, _UNRECOGNIZED_ARGS_ATTR):
+                args.extend(getattr(namespace, _UNRECOGNIZED_ARGS_ATTR))
+                delattr(namespace, _UNRECOGNIZED_ARGS_ATTR)
+            return namespace, args
+        except ArgumentError:
+            err = _sys.exc_info()[1]
+            self.error(str(err))
+
+    def _parse_known_args(self, arg_strings, namespace):
+        # replace arg strings that are file references
+        if self.fromfile_prefix_chars is not None:
+            arg_strings = self._read_args_from_files(arg_strings)
+
+        # map all mutually exclusive arguments to the other arguments
+        # they can't occur with
+        action_conflicts = {}
+        for mutex_group in self._mutually_exclusive_groups:
+            group_actions = mutex_group._group_actions
+            for i, mutex_action in enumerate(mutex_group._group_actions):
+                conflicts = action_conflicts.setdefault(mutex_action, [])
+                conflicts.extend(group_actions[:i])
+                conflicts.extend(group_actions[i + 1:])
+
+        # find all option indices, and determine the arg_string_pattern
+        # which has an 'O' if there is an option at an index,
+        # an 'A' if there is an argument, or a '-' if there is a '--'
+        option_string_indices = {}
+        arg_string_pattern_parts = []
+        arg_strings_iter = iter(arg_strings)
+        for i, arg_string in enumerate(arg_strings_iter):
+
+            # all args after -- are non-options
+            if arg_string == '--':
+                arg_string_pattern_parts.append('-')
+                for arg_string in arg_strings_iter:
+                    arg_string_pattern_parts.append('A')
+
+            # otherwise, add the arg to the arg strings
+            # and note the index if it was an option
+            else:
+                option_tuple = self._parse_optional(arg_string)
+                if option_tuple is None:
+                    pattern = 'A'
+                else:
+                    option_string_indices[i] = option_tuple
+                    pattern = 'O'
+                arg_string_pattern_parts.append(pattern)
+
+        # join the pieces together to form the pattern
+        arg_strings_pattern = ''.join(arg_string_pattern_parts)
+
+        # converts arg strings to the appropriate and then takes the action
+        seen_actions = set()
+        seen_non_default_actions = set()
+
+        def take_action(action, argument_strings, option_string=None):
+            seen_actions.add(action)
+            argument_values = self._get_values(action, argument_strings)
+
+            # error if this argument is not allowed with other previously
+            # seen arguments, assuming that actions that use the default
+            # value don't really count as "present"
+            if argument_values is not action.default:
+                seen_non_default_actions.add(action)
+                for conflict_action in action_conflicts.get(action, []):
+                    if conflict_action in seen_non_default_actions:
+                        msg = _('not allowed with argument %s')
+                        action_name = _get_action_name(conflict_action)
+                        raise ArgumentError(action, msg % action_name)
+
+            # take the action if we didn't receive a SUPPRESS value
+            # (e.g. from a default)
+            if argument_values is not SUPPRESS:
+                action(self, namespace, argument_values, option_string)
+
+        # function to convert arg_strings into an optional action
+        def consume_optional(start_index):
+
+            # get the optional identified at this index
+            option_tuple = option_string_indices[start_index]
+            action, option_string, explicit_arg = option_tuple
+
+            # identify additional optionals in the same arg string
+            # (e.g. -xyz is the same as -x -y -z if no args are required)
+            match_argument = self._match_argument
+            action_tuples = []
+            while True:
+
+                # if we found no optional action, skip it
+                if action is None:
+                    extras.append(arg_strings[start_index])
+                    return start_index + 1
+
+                # if there is an explicit argument, try to match the
+                # optional's string arguments to only this
+                if explicit_arg is not None:
+                    arg_count = match_argument(action, 'A')
+
+                    # if the action is a single-dash option and takes no
+                    # arguments, try to parse more single-dash options out
+                    # of the tail of the option string
+                    chars = self.prefix_chars
+                    if arg_count == 0 and option_string[1] not in chars:
+                        action_tuples.append((action, [], option_string))
+                        char = option_string[0]
+                        option_string = char + explicit_arg[0]
+                        new_explicit_arg = explicit_arg[1:] or None
+                        optionals_map = self._option_string_actions
+                        if option_string in optionals_map:
+                            action = optionals_map[option_string]
+                            explicit_arg = new_explicit_arg
+                        else:
+                            msg = _('ignored explicit argument %r')
+                            raise ArgumentError(action, msg % explicit_arg)
+
+                    # if the action expect exactly one argument, we've
+                    # successfully matched the option; exit the loop
+                    elif arg_count == 1:
+                        stop = start_index + 1
+                        args = [explicit_arg]
+                        action_tuples.append((action, args, option_string))
+                        break
+
+                    # error if a double-dash option did not use the
+                    # explicit argument
+                    else:
+                        msg = _('ignored explicit argument %r')
+                        raise ArgumentError(action, msg % explicit_arg)
+
+                # if there is no explicit argument, try to match the
+                # optional's string arguments with the following strings
+                # if successful, exit the loop
+                else:
+                    start = start_index + 1
+                    selected_patterns = arg_strings_pattern[start:]
+                    arg_count = match_argument(action, selected_patterns)
+                    stop = start + arg_count
+                    args = arg_strings[start:stop]
+                    action_tuples.append((action, args, option_string))
+                    break
+
+            # add the Optional to the list and return the index at which
+            # the Optional's string args stopped
+            assert action_tuples
+            for action, args, option_string in action_tuples:
+                take_action(action, args, option_string)
+            return stop
+
+        # the list of Positionals left to be parsed; this is modified
+        # by consume_positionals()
+        positionals = self._get_positional_actions()
+
+        # function to convert arg_strings into positional actions
+        def consume_positionals(start_index):
+            # match as many Positionals as possible
+            match_partial = self._match_arguments_partial
+            selected_pattern = arg_strings_pattern[start_index:]
+            arg_counts = match_partial(positionals, selected_pattern)
+
+            # slice off the appropriate arg strings for each Positional
+            # and add the Positional and its args to the list
+            for action, arg_count in zip(positionals, arg_counts):
+                args = arg_strings[start_index: start_index + arg_count]
+                start_index += arg_count
+                take_action(action, args)
+
+            # slice off the Positionals that we just parsed and return the
+            # index at which the Positionals' string args stopped
+            positionals[:] = positionals[len(arg_counts):]
+            return start_index
+
+        # consume Positionals and Optionals alternately, until we have
+        # passed the last option string
+        extras = []
+        start_index = 0
+        if option_string_indices:
+            max_option_string_index = max(option_string_indices)
+        else:
+            max_option_string_index = -1
+        while start_index <= max_option_string_index:
+
+            # consume any Positionals preceding the next option
+            next_option_string_index = min([
+                index
+                for index in option_string_indices
+                if index >= start_index])
+            if start_index != next_option_string_index:
+                positionals_end_index = consume_positionals(start_index)
+
+                # only try to parse the next optional if we didn't consume
+                # the option string during the positionals parsing
+                if positionals_end_index > start_index:
+                    start_index = positionals_end_index
+                    continue
+                else:
+                    start_index = positionals_end_index
+
+            # if we consumed all the positionals we could and we're not
+            # at the index of an option string, there were extra arguments
+            if start_index not in option_string_indices:
+                strings = arg_strings[start_index:next_option_string_index]
+                extras.extend(strings)
+                start_index = next_option_string_index
+
+            # consume the next optional and any arguments for it
+            start_index = consume_optional(start_index)
+
+        # consume any positionals following the last Optional
+        stop_index = consume_positionals(start_index)
+
+        # if we didn't consume all the argument strings, there were extras
+        extras.extend(arg_strings[stop_index:])
+
+        # if we didn't use all the Positional objects, there were too few
+        # arg strings supplied.
+        if positionals:
+            self.error(_('too few arguments'))
+
+        # make sure all required actions were present, and convert defaults.
+        for action in self._actions:
+            if action not in seen_actions:
+                if action.required:
+                    name = _get_action_name(action)
+                    self.error(_('argument %s is required') % name)
+                else:
+                    # Convert action default now instead of doing it before
+                    # parsing arguments to avoid calling convert functions
+                    # twice (which may fail) if the argument was given, but
+                    # only if it was defined already in the namespace
+                    if (action.default is not None and
+                            isinstance(action.default, basestring) and
+                            hasattr(namespace, action.dest) and
+                            action.default is getattr(namespace, action.dest)):
+                        setattr(namespace, action.dest,
+                                self._get_value(action, action.default))
+
+        # make sure all required groups had one option present
+        for group in self._mutually_exclusive_groups:
+            if group.required:
+                for action in group._group_actions:
+                    if action in seen_non_default_actions:
+                        break
+
+                # if no actions were used, report the error
+                else:
+                    names = [_get_action_name(action)
+                             for action in group._group_actions
+                             if action.help is not SUPPRESS]
+                    msg = _('one of the arguments %s is required')
+                    self.error(msg % ' '.join(names))
+
+        # return the updated namespace and the extra arguments
+        return namespace, extras
+
+    def _read_args_from_files(self, arg_strings):
+        # expand arguments referencing files
+        new_arg_strings = []
+        for arg_string in arg_strings:
+
+            # for regular arguments, just add them back into the list
+            if arg_string[0] not in self.fromfile_prefix_chars:
+                new_arg_strings.append(arg_string)
+
+            # replace arguments referencing files with the file content
+            else:
+                try:
+                    args_file = open(arg_string[1:])
+                    try:
+                        arg_strings = []
+                        for arg_line in args_file.read().splitlines():
+                            for arg in self.convert_arg_line_to_args(arg_line):
+                                arg_strings.append(arg)
+                        arg_strings = self._read_args_from_files(arg_strings)
+                        new_arg_strings.extend(arg_strings)
+                    finally:
+                        args_file.close()
+                except IOError:
+                    err = _sys.exc_info()[1]
+                    self.error(str(err))
+
+        # return the modified argument list
+        return new_arg_strings
+
+    def convert_arg_line_to_args(self, arg_line):
+        return [arg_line]
+
+    def _match_argument(self, action, arg_strings_pattern):
+        # match the pattern for this action to the arg strings
+        nargs_pattern = self._get_nargs_pattern(action)
+        match = _re.match(nargs_pattern, arg_strings_pattern)
+
+        # raise an exception if we weren't able to find a match
+        if match is None:
+            nargs_errors = {
+                None: _('expected one argument'),
+                OPTIONAL: _('expected at most one argument'),
+                ONE_OR_MORE: _('expected at least one argument'),
+            }
+            default = _('expected %s argument(s)') % action.nargs
+            msg = nargs_errors.get(action.nargs, default)
+            raise ArgumentError(action, msg)
+
+        # return the number of arguments matched
+        return len(match.group(1))
+
+    def _match_arguments_partial(self, actions, arg_strings_pattern):
+        # progressively shorten the actions list by slicing off the
+        # final actions until we find a match
+        result = []
+        for i in range(len(actions), 0, -1):
+            actions_slice = actions[:i]
+            pattern = ''.join([self._get_nargs_pattern(action)
+                               for action in actions_slice])
+            match = _re.match(pattern, arg_strings_pattern)
+            if match is not None:
+                result.extend([len(string) for string in match.groups()])
+                break
+
+        # return the list of arg string counts
+        return result
+
+    def _parse_optional(self, arg_string):
+        # if it's an empty string, it was meant to be a positional
+        if not arg_string:
+            return None
+
+        # if it doesn't start with a prefix, it was meant to be positional
+        if not arg_string[0] in self.prefix_chars:
+            return None
+
+        # if the option string is present in the parser, return the action
+        if arg_string in self._option_string_actions:
+            action = self._option_string_actions[arg_string]
+            return action, arg_string, None
+
+        # if it's just a single character, it was meant to be positional
+        if len(arg_string) == 1:
+            return None
+
+        # if the option string before the "=" is present, return the action
+        if '=' in arg_string:
+            option_string, explicit_arg = arg_string.split('=', 1)
+            if option_string in self._option_string_actions:
+                action = self._option_string_actions[option_string]
+                return action, option_string, explicit_arg
+
+        # search through all possible prefixes of the option string
+        # and all actions in the parser for possible interpretations
+        option_tuples = self._get_option_tuples(arg_string)
+
+        # if multiple actions match, the option string was ambiguous
+        if len(option_tuples) > 1:
+            options = ', '.join([option_string
+                for action, option_string, explicit_arg in option_tuples])
+            tup = arg_string, options
+            self.error(_('ambiguous option: %s could match %s') % tup)
+
+        # if exactly one action matched, this segmentation is good,
+        # so return the parsed action
+        elif len(option_tuples) == 1:
+            option_tuple, = option_tuples
+            return option_tuple
+
+        # if it was not found as an option, but it looks like a negative
+        # number, it was meant to be positional
+        # unless there are negative-number-like options
+        if self._negative_number_matcher.match(arg_string):
+            if not self._has_negative_number_optionals:
+                return None
+
+        # if it contains a space, it was meant to be a positional
+        if ' ' in arg_string:
+            return None
+
+        # it was meant to be an optional but there is no such option
+        # in this parser (though it might be a valid option in a subparser)
+        return None, arg_string, None
+
+    def _get_option_tuples(self, option_string):
+        result = []
+
+        # option strings starting with two prefix characters are only
+        # split at the '='
+        chars = self.prefix_chars
+        if option_string[0] in chars and option_string[1] in chars:
+            if '=' in option_string:
+                option_prefix, explicit_arg = option_string.split('=', 1)
+            else:
+                option_prefix = option_string
+                explicit_arg = None
+            for option_string in self._option_string_actions:
+                if option_string.startswith(option_prefix):
+                    action = self._option_string_actions[option_string]
+                    tup = action, option_string, explicit_arg
+                    result.append(tup)
+
+        # single character options can be concatenated with their arguments
+        # but multiple character options always have to have their argument
+        # separate
+        elif option_string[0] in chars and option_string[1] not in chars:
+            option_prefix = option_string
+            explicit_arg = None
+            short_option_prefix = option_string[:2]
+            short_explicit_arg = option_string[2:]
+
+            for option_string in self._option_string_actions:
+                if option_string == short_option_prefix:
+                    action = self._option_string_actions[option_string]
+                    tup = action, option_string, short_explicit_arg
+                    result.append(tup)
+                elif option_string.startswith(option_prefix):
+                    action = self._option_string_actions[option_string]
+                    tup = action, option_string, explicit_arg
+                    result.append(tup)
+
+        # shouldn't ever get here
+        else:
+            self.error(_('unexpected option string: %s') % option_string)
+
+        # return the collected option tuples
+        return result
+
+    def _get_nargs_pattern(self, action):
+        # in all examples below, we have to allow for '--' args
+        # which are represented as '-' in the pattern
+        nargs = action.nargs
+
+        # the default (None) is assumed to be a single argument
+        if nargs is None:
+            nargs_pattern = '(-*A-*)'
+
+        # allow zero or one arguments
+        elif nargs == OPTIONAL:
+            nargs_pattern = '(-*A?-*)'
+
+        # allow zero or more arguments
+        elif nargs == ZERO_OR_MORE:
+            nargs_pattern = '(-*[A-]*)'
+
+        # allow one or more arguments
+        elif nargs == ONE_OR_MORE:
+            nargs_pattern = '(-*A[A-]*)'
+
+        # allow any number of options or arguments
+        elif nargs == REMAINDER:
+            nargs_pattern = '([-AO]*)'
+
+        # allow one argument followed by any number of options or arguments
+        elif nargs == PARSER:
+            nargs_pattern = '(-*A[-AO]*)'
+
+        # all others should be integers
+        else:
+            nargs_pattern = '(-*%s-*)' % '-*'.join('A' * nargs)
+
+        # if this is an optional action, -- is not allowed
+        if action.option_strings:
+            nargs_pattern = nargs_pattern.replace('-*', '')
+            nargs_pattern = nargs_pattern.replace('-', '')
+
+        # return the pattern
+        return nargs_pattern
+
+    # ========================
+    # Value conversion methods
+    # ========================
+    def _get_values(self, action, arg_strings):
+        # for everything but PARSER args, strip out '--'
+        if action.nargs not in [PARSER, REMAINDER]:
+            arg_strings = [s for s in arg_strings if s != '--']
+
+        # optional argument produces a default when not present
+        if not arg_strings and action.nargs == OPTIONAL:
+            if action.option_strings:
+                value = action.const
+            else:
+                value = action.default
+            if isinstance(value, basestring):
+                value = self._get_value(action, value)
+                self._check_value(action, value)
+
+        # when nargs='*' on a positional, if there were no command-line
+        # args, use the default if it is anything other than None
+        elif (not arg_strings and action.nargs == ZERO_OR_MORE and
+              not action.option_strings):
+            if action.default is not None:
+                value = action.default
+            else:
+                value = arg_strings
+            self._check_value(action, value)
+
+        # single argument or optional argument produces a single value
+        elif len(arg_strings) == 1 and action.nargs in [None, OPTIONAL]:
+            arg_string, = arg_strings
+            value = self._get_value(action, arg_string)
+            self._check_value(action, value)
+
+        # REMAINDER arguments convert all values, checking none
+        elif action.nargs == REMAINDER:
+            value = [self._get_value(action, v) for v in arg_strings]
+
+        # PARSER arguments convert all values, but check only the first
+        elif action.nargs == PARSER:
+            value = [self._get_value(action, v) for v in arg_strings]
+            self._check_value(action, value[0])
+
+        # all other types of nargs produce a list
+        else:
+            value = [self._get_value(action, v) for v in arg_strings]
+            for v in value:
+                self._check_value(action, v)
+
+        # return the converted value
+        return value
+
+    def _get_value(self, action, arg_string):
+        type_func = self._registry_get('type', action.type, action.type)
+        if not _callable(type_func):
+            msg = _('%r is not callable')
+            raise ArgumentError(action, msg % type_func)
+
+        # convert the value to the appropriate type
+        try:
+            result = type_func(arg_string)
+
+        # ArgumentTypeErrors indicate errors
+        except ArgumentTypeError:
+            name = getattr(action.type, '__name__', repr(action.type))
+            msg = str(_sys.exc_info()[1])
+            raise ArgumentError(action, msg)
+
+        # TypeErrors or ValueErrors also indicate errors
+        except (TypeError, ValueError):
+            name = getattr(action.type, '__name__', repr(action.type))
+            msg = _('invalid %s value: %r')
+            raise ArgumentError(action, msg % (name, arg_string))
+
+        # return the converted value
+        return result
+
+    def _check_value(self, action, value):
+        # converted value must be one of the choices (if specified)
+        if action.choices is not None and value not in action.choices:
+            tup = value, ', '.join(map(repr, action.choices))
+            msg = _('invalid choice: %r (choose from %s)') % tup
+            raise ArgumentError(action, msg)
+
+    # =======================
+    # Help-formatting methods
+    # =======================
+    def format_usage(self):
+        formatter = self._get_formatter()
+        formatter.add_usage(self.usage, self._actions,
+                            self._mutually_exclusive_groups)
+        return formatter.format_help()
+
+    def format_help(self):
+        formatter = self._get_formatter()
+
+        # usage
+        formatter.add_usage(self.usage, self._actions,
+                            self._mutually_exclusive_groups)
+
+        # description
+        formatter.add_text(self.description)
+
+        # positionals, optionals and user-defined groups
+        for action_group in self._action_groups:
+            formatter.start_section(action_group.title)
+            formatter.add_text(action_group.description)
+            formatter.add_arguments(action_group._group_actions)
+            formatter.end_section()
+
+        # epilog
+        formatter.add_text(self.epilog)
+
+        # determine help from format above
+        return formatter.format_help()
+
+    def format_version(self):
+        import warnings
+        warnings.warn(
+            'The format_version method is deprecated -- the "version" '
+            'argument to ArgumentParser is no longer supported.',
+            DeprecationWarning)
+        formatter = self._get_formatter()
+        formatter.add_text(self.version)
+        return formatter.format_help()
+
+    def _get_formatter(self):
+        return self.formatter_class(prog=self.prog)
+
+    # =====================
+    # Help-printing methods
+    # =====================
+    def print_usage(self, file=None):
+        if file is None:
+            file = _sys.stdout
+        self._print_message(self.format_usage(), file)
+
+    def print_help(self, file=None):
+        if file is None:
+            file = _sys.stdout
+        self._print_message(self.format_help(), file)
+
+    def print_version(self, file=None):
+        import warnings
+        warnings.warn(
+            'The print_version method is deprecated -- the "version" '
+            'argument to ArgumentParser is no longer supported.',
+            DeprecationWarning)
+        self._print_message(self.format_version(), file)
+
+    def _print_message(self, message, file=None):
+        if message:
+            if file is None:
+                file = _sys.stderr
+            file.write(message)
+
+    # ===============
+    # Exiting methods
+    # ===============
+    def exit(self, status=0, message=None):
+        if message:
+            self._print_message(message, _sys.stderr)
+        _sys.exit(status)
+
+    def error(self, message):
+        """error(message: string)
+
+        Prints a usage message incorporating the message to stderr and
+        exits.
+
+        If you override this in a subclass, it should not return -- it
+        should either exit or raise an exception.
+        """
+        self.print_usage(_sys.stderr)
+        self.exit(2, _('%s: error: %s\n') % (self.prog, message))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/easy_install.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/easy_install.py
new file mode 100644
index 00000000..d87e9840
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/easy_install.py
@@ -0,0 +1,5 @@
+"""Run the EasyInstall command"""
+
+if __name__ == '__main__':
+    from setuptools.command.easy_install import main
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/METADATA
new file mode 100644
index 00000000..4a9812e6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/METADATA
@@ -0,0 +1,135 @@
+Metadata-Version: 2.1
+Name: epc
+Version: 0.0.5
+Summary: EPC (RPC stack for Emacs Lisp) implementation in Python
+Home-page: https://github.com/tkf/python-epc
+Author: Takafumi Arakaki
+Author-email: aka.tkf@gmail.com
+License: GNU General Public License v3 (GPLv3)
+Keywords: Emacs,RPC
+Platform: UNKNOWN
+Classifier: Development Status :: 3 - Alpha
+Classifier: License :: OSI Approved :: GNU General Public License v3 (GPLv3)
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.6
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.2
+Classifier: Programming Language :: Emacs-Lisp
+Requires-Dist: sexpdata (>=0.0.3)
+
+
+EPC (RPC stack for Emacs Lisp) for Python
+=========================================
+
+Links:
+
+* `Documentation <http://python-epc.readthedocs.org/>`_ (at Read the Docs)
+* `Repository <https://github.com/tkf/python-epc>`_ (at GitHub)
+* `Issue tracker <https://github.com/tkf/python-epc/issues>`_ (at GitHub)
+* `PyPI <http://pypi.python.org/pypi/epc>`_
+* `Travis CI <https://travis-ci.org/#!/tkf/python-epc>`_ |build-status|
+
+Other resources:
+
+* `kiwanami/emacs-epc <https://github.com/kiwanami/emacs-epc>`_
+  (Client and server implementation in Emacs Lisp and Perl.)
+* `tkf/emacs-jedi <https://github.com/tkf/emacs-jedi>`_
+  (Python completion for Emacs using EPC server.)
+
+.. |build-status|
+   image:: https://secure.travis-ci.org/tkf/python-epc.png
+           ?branch=master
+   :target: http://travis-ci.org/tkf/python-epc
+   :alt: Build Status
+
+
+What is this?
+-------------
+
+EPC is an RPC stack for Emacs Lisp and Python-EPC is its server side
+and client side implementation in Python.  Using Python-EPC, you can
+easily call Emacs Lisp functions from Python and Python functions from
+Emacs.  For example, you can use Python GUI module to build widgets
+for Emacs (see `examples/gtk/server.py`_ for example).
+
+Python-EPC is tested against Python 2.6, 2.7 and 3.2.
+
+Install
+-------
+
+To install Python-EPC and its dependency sexpdata_, run the following
+command.::
+
+   pip install epc
+
+.. _sexpdata: https://github.com/tkf/sexpdata
+
+
+Usage
+-----
+
+Save the following code as ``my-server.py``.
+(You can find functionally the same code in `examples/echo/server.py`_)::
+
+   from epc.server import EPCServer
+
+   server = EPCServer(('localhost', 0))
+
+   @server.register_function
+   def echo(*a):
+       return a
+
+   server.print_port()
+   server.serve_forever()
+
+
+And then run the following code from Emacs.
+This is a stripped version of `examples/echo/client.el`_ included in
+Python-EPC repository_.::
+
+   (require 'epc)
+
+   (defvar my-epc (epc:start-epc "python" '("my-server.py")))
+
+   (deferred:$
+     (epc:call-deferred my-epc 'echo '(10))
+     (deferred:nextc it
+       (lambda (x) (message "Return : %S" x))))
+
+   (message "Return : %S" (epc:call-sync my-epc 'echo '(10 40)))
+
+
+.. _examples/echo/server.py:
+   https://github.com/tkf/python-epc/blob/master/examples/echo/server.py
+.. _examples/echo/client.el:
+   https://github.com/tkf/python-epc/blob/master/examples/echo/client.el
+
+If you have carton_ installed, you can run the above sample by
+simply typing the following commands::
+
+   make elpa        # install EPC in a separated environment
+   make run-sample  # run examples/echo/client.el
+
+.. _carton: https://github.com/rejeep/carton
+
+
+For example of bidirectional communication and integration with GTK,
+see `examples/gtk/server.py`_.  You can run this example by::
+
+   make elpa
+   make run-gtk-sample  # run examples/gtk/client.el
+
+.. _examples/gtk/server.py:
+   https://github.com/tkf/python-epc/blob/master/examples/gtk/server.py
+
+
+License
+-------
+
+Python-EPC is licensed under GPL v3.
+See COPYING for details.
+
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/RECORD
new file mode 100644
index 00000000..085d5a44
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/RECORD
@@ -0,0 +1,33 @@
+epc-0.0.5.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4

+epc-0.0.5.dist-info/METADATA,sha256=8sVLUEeMgab3gWpPldH6myWDniKsglveBshPVNGPL0E,3820

+epc-0.0.5.dist-info/RECORD,,

+epc-0.0.5.dist-info/WHEEL,sha256=0rHDOana14hzsaua2J2L7Ztk6sto42O0noJt7O00ZjE,93

+epc-0.0.5.dist-info/top_level.txt,sha256=9dT_oS-8LtmnaKriVBH7UatoUKH6fcL7WEdxrp7Fg7E,4

+epc/__init__.py,sha256=I3Xw7nrtgJMsWouE_jscKYYBxZ1IOAGMKh0UqgW5D2I,3910

+epc/__pycache__/__init__.cpython-37.pyc,,

+epc/__pycache__/client.cpython-37.pyc,,

+epc/__pycache__/core.cpython-37.pyc,,

+epc/__pycache__/handler.cpython-37.pyc,,

+epc/__pycache__/py3compat.cpython-37.pyc,,

+epc/__pycache__/server.cpython-37.pyc,,

+epc/__pycache__/utils.cpython-37.pyc,,

+epc/client.py,sha256=PM1pfyEDjnRALvYNyaZaedevzTg6X6Cfn3-JppkHlYY,4301

+epc/core.py,sha256=lL8o0dD4xVnnvFQzJibpiFCohzA7lYs5EBol0MGkQ5g,3936

+epc/handler.py,sha256=3uXV7Oc2xnfIyz0kC_LZOkLrTYpjrNUyWNUfAU4PWFg,13330

+epc/py3compat.py,sha256=TaJfvF6AXVQR11RGt4TWV1BK3Gc1iYfppQa8AywXtP4,1449

+epc/server.py,sha256=UKqiP4vw-6dCcIhZ2g0J1M6ezaMPgFfW5jXyhqZHviE,7616

+epc/tests/__init__.py,sha256=5xTdi6LZ3_JIon6cOURs6viwSNjkz8yx23LE03OGLMg,673

+epc/tests/__pycache__/__init__.cpython-37.pyc,,

+epc/tests/__pycache__/test_client.cpython-37.pyc,,

+epc/tests/__pycache__/test_dispatcher.cpython-37.pyc,,

+epc/tests/__pycache__/test_py2py.cpython-37.pyc,,

+epc/tests/__pycache__/test_server.cpython-37.pyc,,

+epc/tests/__pycache__/test_utils.cpython-37.pyc,,

+epc/tests/__pycache__/utils.cpython-37.pyc,,

+epc/tests/test_client.py,sha256=tbc4D6UhdR-EuJXvOXCmkFD7XXippQ6gCXllBKccqk4,5032

+epc/tests/test_dispatcher.py,sha256=loYRq8NJjY-LPKCB3hq5xkotVsXzTxrhS2pv7jxpMZM,2164

+epc/tests/test_py2py.py,sha256=W6Z5qZqS4HlG3GUu0eb13gpesdkME6wKcoIKQ01Eamw,6880

+epc/tests/test_server.py,sha256=x6wBBy1P9jscn5NJa9wLJfDEcKmJXW6GvM2Tft0Rnbc,12370

+epc/tests/test_utils.py,sha256=BeYRL8Z3UF8zRRTxIVzK1drvMBvIE_BxKzBVBxX8R1o,1883

+epc/tests/utils.py,sha256=mhCkWRq8v2a5KG030JuDfZRXeDyou_ozvDmeQnL5FAA,3181

+epc/utils.py,sha256=K7UfgeuFCLgiq2jirbkzIv37WsXWe0kBJduhJ2rschk,4375

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/WHEEL
new file mode 100644
index 00000000..c1ce8476
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.4)
+Root-Is-Purelib: true
+Tag: cp37-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/top_level.txt
new file mode 100644
index 00000000..5ab38b55
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc-0.0.5.dist-info/top_level.txt
@@ -0,0 +1 @@
+epc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__init__.py
new file mode 100644
index 00000000..3c5c2f41
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__init__.py
@@ -0,0 +1,135 @@
+# [[[cog import cog; cog.outl('"""\n%s\n"""' % file('../README.rst').read())]]]
+"""
+EPC (RPC stack for Emacs Lisp) for Python
+=========================================
+
+Links:
+
+* `Documentation <http://python-epc.readthedocs.org/>`_ (at Read the Docs)
+* `Repository <https://github.com/tkf/python-epc>`_ (at GitHub)
+* `Issue tracker <https://github.com/tkf/python-epc/issues>`_ (at GitHub)
+* `PyPI <http://pypi.python.org/pypi/epc>`_
+* `Travis CI <https://travis-ci.org/#!/tkf/python-epc>`_ |build-status|
+
+Other resources:
+
+* `kiwanami/emacs-epc <https://github.com/kiwanami/emacs-epc>`_
+  (Client and server implementation in Emacs Lisp and Perl.)
+* `tkf/emacs-jedi <https://github.com/tkf/emacs-jedi>`_
+  (Python completion for Emacs using EPC server.)
+
+.. |build-status|
+   image:: https://secure.travis-ci.org/tkf/python-epc.png
+           ?branch=master
+   :target: http://travis-ci.org/tkf/python-epc
+   :alt: Build Status
+
+
+What is this?
+-------------
+
+EPC is an RPC stack for Emacs Lisp and Python-EPC is its server side
+and client side implementation in Python.  Using Python-EPC, you can
+easily call Emacs Lisp functions from Python and Python functions from
+Emacs.  For example, you can use Python GUI module to build widgets
+for Emacs (see `examples/gtk/server.py`_ for example).
+
+Python-EPC is tested against Python 2.6, 2.7 and 3.2.
+
+Install
+-------
+
+To install Python-EPC and its dependency sexpdata_, run the following
+command.::
+
+   pip install epc
+
+.. _sexpdata: https://github.com/tkf/sexpdata
+
+
+Usage
+-----
+
+Save the following code as ``my-server.py``.
+(You can find functionally the same code in `examples/echo/server.py`_)::
+
+   from epc.server import EPCServer
+
+   server = EPCServer(('localhost', 0))
+
+   @server.register_function
+   def echo(*a):
+       return a
+
+   server.print_port()
+   server.serve_forever()
+
+
+And then run the following code from Emacs.
+This is a stripped version of `examples/echo/client.el`_ included in
+Python-EPC repository_.::
+
+   (require 'epc)
+
+   (defvar my-epc (epc:start-epc "python" '("my-server.py")))
+
+   (deferred:$
+     (epc:call-deferred my-epc 'echo '(10))
+     (deferred:nextc it
+       (lambda (x) (message "Return : %S" x))))
+
+   (message "Return : %S" (epc:call-sync my-epc 'echo '(10 40)))
+
+
+.. _examples/echo/server.py:
+   https://github.com/tkf/python-epc/blob/master/examples/echo/server.py
+.. _examples/echo/client.el:
+   https://github.com/tkf/python-epc/blob/master/examples/echo/client.el
+
+If you have carton_ installed, you can run the above sample by
+simply typing the following commands::
+
+   make elpa        # install EPC in a separated environment
+   make run-sample  # run examples/echo/client.el
+
+.. _carton: https://github.com/rejeep/carton
+
+
+For example of bidirectional communication and integration with GTK,
+see `examples/gtk/server.py`_.  You can run this example by::
+
+   make elpa
+   make run-gtk-sample  # run examples/gtk/client.el
+
+.. _examples/gtk/server.py:
+   https://github.com/tkf/python-epc/blob/master/examples/gtk/server.py
+
+
+License
+-------
+
+Python-EPC is licensed under GPL v3.
+See COPYING for details.
+
+"""
+# [[[end]]]
+
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+__version__ = '0.0.5'
+__author__ = 'Takafumi Arakaki'
+__license__ = 'GNU General Public License v3 (GPLv3)'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..1871b6f9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/client.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/client.cpython-37.pyc
new file mode 100644
index 00000000..56e8e0b5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/client.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/core.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/core.cpython-37.pyc
new file mode 100644
index 00000000..dbbf284d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/core.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/handler.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/handler.cpython-37.pyc
new file mode 100644
index 00000000..4d1411a9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/handler.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/py3compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/py3compat.cpython-37.pyc
new file mode 100644
index 00000000..9763e96d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/py3compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/server.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/server.cpython-37.pyc
new file mode 100644
index 00000000..95e3525a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/server.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..87e63b40
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/client.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/client.py
new file mode 100644
index 00000000..f24a7cd9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/client.py
@@ -0,0 +1,139 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from .py3compat import Queue
+from .utils import ThreadedIterator, newthread
+from .core import EPCCore
+from .handler import ThreadingEPCHandler
+
+
+class EPCClientHandler(ThreadingEPCHandler):
+
+    # In BaseRequestHandler, everything happen in `.__init__()`.
+    # Let's defer it to `.start()`.
+
+    def __init__(self, *args):
+        self._args = args
+        self._ready = Queue.Queue()
+
+    def start(self):
+        ThreadingEPCHandler.__init__(self, *self._args)
+
+    def setup(self):
+        ThreadingEPCHandler.setup(self)
+        self._ready.put(True)
+
+    def wait_until_ready(self):
+        self._ready.get()
+
+    def _recv(self):
+        self._recv_iter = ThreadedIterator(ThreadingEPCHandler._recv(self))
+        return self._recv_iter
+
+
+class EPCClient(EPCCore):
+
+    """
+    EPC client class to call remote functions and serve Python functions.
+
+    >>> client = EPCClient()
+    >>> client.connect(('localhost', 9999))                 #doctest: +SKIP
+    >>> client.call_sync('echo', [111, 222, 333])           #doctest: +SKIP
+    [111, 222, 333]
+
+    To serve Python functions, you can use :meth:`register_function`.
+
+    >>> client.register_function(str.upper)
+    <method 'upper' of 'str' objects>
+
+    :meth:`register_function` can be used as a decorator.
+
+    >>> @client.register_function
+    ... def add(x, y):
+    ...     return x + y
+
+    Also, you can initialize client and connect to the server by one line.
+
+    >>> client = EPCClient(('localhost', 9999))             #doctest: +SKIP
+
+    .. method:: call
+
+       Alias of :meth:`epc.server.EPCHandler.call`.
+
+    .. method:: call_sync
+
+       Alias of :meth:`epc.server.EPCHandler.call_sync`.
+
+    .. method:: methods
+
+       Alias of :meth:`epc.server.EPCHandler.methods`.
+
+    .. method:: methods_sync
+
+       Alias of :meth:`epc.server.EPCHandler.methods_sync`.
+
+    """
+
+    thread_daemon = True
+
+    def __init__(self, socket_or_address=None,
+                 debugger=None, log_traceback=False):
+        if socket_or_address is not None:
+            self.connect(socket_or_address)
+        EPCCore.__init__(self, debugger, log_traceback)
+
+    def connect(self, socket_or_address):
+        """
+        Connect to server and start serving registered functions.
+
+        :type socket_or_address: tuple or socket object
+        :arg  socket_or_address: A ``(host, port)`` pair to be passed
+                                 to `socket.create_connection`, or
+                                 a socket object.
+
+        """
+        if isinstance(socket_or_address, tuple):
+            import socket
+            self.socket = socket.create_connection(socket_or_address)
+        else:
+            self.socket = socket_or_address
+
+        # This is what BaseServer.finish_request does:
+        address = None  # it is not used, so leave it empty
+        self.handler = EPCClientHandler(self.socket, address, self)
+
+        self.call = self.handler.call
+        self.call_sync = self.handler.call_sync
+        self.methods = self.handler.methods
+        self.methods_sync = self.handler.methods_sync
+
+        self.handler_thread = newthread(self, target=self.handler.start)
+        self.handler_thread.daemon = self.thread_daemon
+        self.handler_thread.start()
+        self.handler.wait_until_ready()
+
+    def close(self):
+        """Close connection."""
+        try:
+            self.handler._recv_iter.stop()
+        except AttributeError:
+            # Do not fail to close even if the client is never used.
+            pass
+
+    def _ignore(*_):
+        """"Do nothing method for `EPCHandler`."""
+    add_client = _ignore
+    remove_client = _ignore
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/core.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/core.py
new file mode 100644
index 00000000..5157f77d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/core.py
@@ -0,0 +1,131 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import logging
+from .py3compat import SimpleXMLRPCServer
+
+
+def _get_logger():
+    """
+    Generate a logger with a stream handler.
+    """
+    logger = logging.getLogger('epc')
+    hndlr = logging.StreamHandler()
+    hndlr.setLevel(logging.INFO)
+    hndlr.setFormatter(logging.Formatter(logging.BASIC_FORMAT))
+    logger.addHandler(hndlr)
+    return logger
+_logger = _get_logger()
+
+
+class EPCDispatcher:
+
+    # This class will be mixed with `SocketServer.TCPServer`,
+    # which is an old style class.
+
+    # see also: SimpleXMLRPCServer.SimpleXMLRPCDispatcher
+
+    def __init__(self):
+        self.funcs = {}
+        self.instance = None
+
+    def register_instance(self, instance, allow_dotted_names=False):
+        """
+        Register an instance to respond to EPC requests.
+
+        :type instance: object
+        :arg  instance:
+            An object with methods to provide to peer.  If this
+            instance has `_get_method` method, EPC method name
+            resolution can be done by this method.
+
+        :type allow_dotted_names: bool
+        :arg  allow_dotted_names:
+            If it is true, method names containing dots are supported.
+            They are resolved using `getattr` for each part of the
+            name as long as it does not start with '_'.
+
+        Unlike :meth:`register_function`, only one instance can
+        be registered.
+
+        """
+        self.instance = instance
+        self.allow_dotted_names = allow_dotted_names
+
+    def register_function(self, function, name=None):
+        """
+        Register function to be called from EPC client.
+
+        :type  function: callable
+        :arg   function: Function to publish.
+        :type      name: str
+        :arg       name: Name by which function is published.
+
+        This method returns the given `function` as-is, so that you
+        can use it as a decorator.
+
+        """
+        if name is None:
+            name = function.__name__
+        self.funcs[name] = function
+        return function
+
+    def get_method(self, name):
+        """
+        Get registered method callend `name`.
+        """
+        try:
+            return self.funcs[name]
+        except KeyError:
+            try:
+                return self.instance._get_method(name)
+            except AttributeError:
+                return SimpleXMLRPCServer.resolve_dotted_attribute(
+                    self.instance, name, self.allow_dotted_names)
+
+
+class EPCCore(EPCDispatcher):
+
+    """
+    Core methods shared by `EPCServer` and `EPCClient`.
+    """
+
+    logger = _logger
+
+    def __init__(self, debugger, log_traceback):
+        EPCDispatcher.__init__(self)
+        self.set_debugger(debugger)
+        self.log_traceback = log_traceback
+
+    def set_debugger(self, debugger):
+        """
+        Set debugger to run when an error occurs in published method.
+
+        You can also set debugger by passing `debugger` argument to
+        the class constructor.
+
+        :type debugger: {'pdb', 'ipdb', None}
+        :arg  debugger: type of debugger.
+
+        """
+        if debugger == 'pdb':
+            import pdb
+            self.debugger = pdb
+        elif debugger == 'ipdb':
+            import ipdb
+            self.debugger = ipdb
+        else:
+            self.debugger = debugger
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/handler.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/handler.py
new file mode 100644
index 00000000..3e67ea00
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/handler.py
@@ -0,0 +1,414 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import sys
+import itertools
+import threading
+
+from sexpdata import loads, dumps, Symbol, String
+
+from .py3compat import SocketServer, Queue
+from .utils import autolog, LockingDict, newthread, callwith
+
+
+class BaseRemoteError(Exception):
+    """
+    All exceptions from remote method are derived from this class.
+    """
+
+
+class CallerUnknown(BaseRemoteError):
+    """
+    Error raised in remote method, but caller of the method is unknown.
+    """
+
+
+class EPCError(BaseRemoteError):
+    """
+    Error returned by `epc-error` protocol.
+    """
+
+
+class ReturnError(BaseRemoteError):
+    """
+    Error returned by `return-error` protocol.
+    """
+
+
+class EPCErrorCallerUnknown(CallerUnknown, EPCError):
+    """
+    Same as :class:`EPCError`, but caller is unknown.
+    """
+
+
+class ReturnErrorCallerUnknown(CallerUnknown, ReturnError):
+    """
+    Same as :class:`ReturnError`, but caller is unknown.
+    """
+
+
+class EPCClosed(Exception):
+    """
+    Trying to send to a closed socket.
+    """
+
+
+def encode_string(string):
+    data = string.encode('utf-8')
+    datalen = '{0:06x}'.format(len(data) + 1).encode()
+    return _JOIN_BYTES([datalen, data, _NEWLINE_BYTE])
+_JOIN_BYTES = ''.encode().join
+_NEWLINE_BYTE = '\n'.encode()
+
+
+def encode_object(obj, **kwds):
+    return encode_string(dumps(obj, **kwds))
+
+
+def encode_message(name, *args, **kwds):
+    return encode_object([Symbol(name)] + list(args), **kwds)
+
+
+def unpack_message(bytes):
+    data = loads(bytes.decode('utf-8'))
+    return (data[0].value(), data[1], data[2:])
+
+
+def itermessage(read):
+    while True:
+        head = read(6)
+        if not head:
+            return
+        length = int(head, 16)
+        data = read(length)
+        if len(data) < length:
+            raise ValueError('need {0}-length data; got {1}'
+                             .format(length, len(data)))
+        yield data
+
+
+class BlockingCallback(object):
+
+    def __init__(self):
+        self.queue = q = Queue.Queue()
+        self.callback = lambda x: q.put(('return', x))
+        self.errback = lambda x: q.put(('error', x))
+        self.cbs = {'callback': self.callback, 'errback': self.errback}
+
+    def result(self, timeout):
+        (rtype, reply) = self.queue.get(timeout=timeout)
+        if rtype == 'return':
+            return reply
+        else:
+            raise reply
+
+
+class EPCCallManager:
+
+    Dict = LockingDict  # FIXME: make it configurable from server class.
+    """
+    Dictionary class used to store callbacks.
+    """
+
+    def __init__(self):
+        self.callbacks = self.Dict()
+        counter = itertools.count(1)
+        self.get_uid = callwith(threading.Lock())(lambda: next(counter))
+        # Wrapping by threading.Lock is useless for non-threading
+        # handler.  Probably it is better to make it optional.
+
+    def call(self, handler, name, args=[], callback=None, errback=None):
+        uid = self.get_uid()
+        self.callbacks[uid] = (callback, errback)
+        handler._send('call', uid, Symbol(name), args)
+
+    def methods(self, handler, callback=None, errback=None):
+        uid = self.get_uid()
+        self.callbacks[uid] = (callback, errback)
+        handler._send('methods', uid)
+
+    def handle_return(self, uid, reply):
+        try:
+            (callback, _) = self.callbacks.pop(uid)
+        except (KeyError, TypeError):
+            raise CallerUnknown(reply)
+        if callback is not None:
+            callback(reply)
+
+    def _handle_error_reply(self, uid, reply, eclass, notfound):
+        try:
+            (_, errback) = self.callbacks.pop(uid)
+        except (KeyError, TypeError):
+            raise notfound(reply)
+        error = eclass(reply)
+        if errback is None:
+            raise error
+        else:
+            errback(error)
+
+    def handle_return_error(self, uid, reply):
+        self._handle_error_reply(uid, reply, ReturnError,
+                                 ReturnErrorCallerUnknown)
+
+    def handle_epc_error(self, uid, reply):
+        self._handle_error_reply(uid, reply, EPCError,
+                                 EPCErrorCallerUnknown)
+
+
+class EPCHandler(SocketServer.StreamRequestHandler):
+
+    # These attribute are defined in `SocketServer.BaseRequestHandler`
+    # self.server  : an instance of `EPCServer`
+    # self.request :
+    # self.client_address
+
+    # These attribute are defined in `SocketServer.StreamRequestHandler`
+    # self.connection : = self.request
+    # self.rfile      : stream from client
+    # self.wfile      : stream to client
+
+    @property
+    def logger(self):
+        return self.server.logger
+
+    @autolog('debug')
+    def setup(self):
+        SocketServer.StreamRequestHandler.setup(self)
+        self.callmanager = EPCCallManager()
+        self.server.add_client(self)
+
+    @autolog('debug')
+    def finish(self):
+        try:
+            SocketServer.StreamRequestHandler.finish(self)
+        finally:
+            self.server.remove_client(self)
+
+    def _rfile_read_safely(self, size):
+        try:
+            return self.rfile.read(size)
+        except (AttributeError, ValueError):
+            if self.rfile.closed:
+                # Calling read on closed socket raises
+                # AttributeError in 2.x and ValueError in 3.x.
+                # http://bugs.python.org/issue9177
+                raise StopIteration
+            else:
+                raise  # if not, just re-raise it.
+
+    def _recv(self):
+        self.logger.debug('receiving...')
+        for data in itermessage(self._rfile_read_safely):
+            self.logger.debug(
+                'received: length = %r; data = %r', len(data), data)
+            yield data
+            self.logger.debug('receiving...')
+
+    @autolog('debug')
+    def _send(self, *args):
+        string = encode_message(*args)
+        try:
+            self.wfile.write(string)
+        except (AttributeError, ValueError):
+            # See also: :meth:`_rfile_read_safely`
+            raise EPCClosed
+
+    @autolog('debug')
+    def handle(self):
+        for sexp in self._recv():
+            self._handle(sexp)
+
+    @autolog('debug')
+    def _handle(self, sexp):
+        uid = undefined = []  # default: nil
+        try:
+            (name, uid, args) = unpack_message(sexp)
+            pyname = name.replace('-', '_')
+            getattr(self, '_validate_{0}'.format(pyname))(uid, args)
+            handler = getattr(self, '_handle_{0}'.format(pyname))
+            reply = handler(uid, *args)
+            if reply is not None:
+                self._send(*reply)
+        except Exception as err:
+            if self.handle_error(err):
+                return
+            if self.server.debugger or self.server.log_traceback:
+                exc_info = sys.exc_info()
+                self.logger.error('Unexpected error', exc_info=exc_info)
+            if self.server.debugger:
+                self.server.debugger.post_mortem(exc_info[2])
+            name = 'epc-error' if uid is undefined else 'return-error'
+            self._send(name, uid, repr(err))
+
+    @autolog('debug')
+    def _handle_call(self, uid, meth, args):
+        # See: `epc:handler-called-method`
+        name = meth.value()
+        try:
+            func = self.server.get_method(name)
+        except AttributeError:
+            return ['epc-error', uid,
+                    "EPC-ERROR: No such method : {0}".format(name)]
+        return ['return', uid, func(*args)]
+
+    def _handle_methods(self, uid):
+        return ['return', uid, [
+            (Symbol(name), [], String(func.__doc__ or ""))
+            # FIXNE: implement arg-specs
+            for (name, func)
+            in self.server.funcs.items()]]
+
+    def _handle_return(self, uid, reply):
+        self.callmanager.handle_return(uid, reply)
+
+    def _handle_return_error(self, uid, reply=None, *_):
+        self.callmanager.handle_return_error(uid, reply)
+
+    def _handle_epc_error(self, uid, reply=None, *_):
+        self.callmanager.handle_epc_error(uid, reply)
+
+    _epc_error_template = \
+        "(%s %d ...): Got %s arguments in the reply: %r"
+
+    def _validate_call(self, uid, args, num_expect=2, name='call'):
+        len_args = len(args)
+        if len_args == num_expect:
+            return
+        elif len_args < num_expect:
+            message = 'Not enough arguments {0!r}'.format(args)
+        else:
+            message = 'Too many arguments {0!r}'.format(args)
+        self._send("epc-error", uid, message)
+        raise EPCError('({0} {1} ...): {2}'.format(name, uid, message))
+
+    def _validate_methods(self, uid, args):
+        self._validate_call(uid, args, 0, 'methods')
+
+    def _validate_return(self, uid, args):
+        len_args = len(args)
+        error = lambda x: self._epc_error_template % ('return', uid, x, args)
+        if len_args == 0:
+            message = error('not enough')
+        elif len_args > 1:
+            message = error('too many')
+        else:
+            return
+        self.logger.error(message)
+        self._handle_epc_error(uid, message)
+        raise EPCError(message)
+
+    def _validate_return_error(self, uid, args):
+        self._log_extra_argument_error('return-error', uid, args)
+
+    def _validate_epc_error(self, uid, args):
+        self._log_extra_argument_error('epc-error', uid, args)
+
+    def _log_extra_argument_error(self, name, uid, args):
+        if len(args) > 1:
+            self.logger.error(self._epc_error_template,
+                              'return-error', uid, 'too many', args)
+
+    def handle_error(self, err):
+        """
+        Handle error which is not handled by errback.
+
+        :type  err: Exception
+        :arg   err: An error not handled by other mechanisms.
+        :rtype: boolean
+
+        Return True from this function means that error is properly
+        handled, so the error is not sent to client.  Do not confuse
+        this with :meth:`SocketServer.BaseServer.handle_error`.  This
+        method is for handling error for each client, not for entire
+        server.  Default implementation logs the error and returns
+        True if the error is coming from remote [#]_ or returns False
+        otherwise. Therefore, only the error occurs in this handler
+        class is sent to remote.
+
+        .. [#] More specifically, it returns True if `err` is an
+           instance of :class:`BaseRemoteError` or :class:`EPCClosed`.
+
+        """
+        self.logger.error(repr(err))
+        if isinstance(err, (BaseRemoteError, EPCClosed)):
+            # BaseRemoteError: do not send error back
+            # EPCClosed: no exception from thread
+            return True
+
+    def call(self, name, *args, **kwds):
+        """
+        Call method connected to this handler.
+
+        :type     name: str
+        :arg      name: Method name to call.
+        :type     args: list
+        :arg      args: Arguments for remote method to call.
+        :type callback: callable
+        :arg  callback: A function to be called with returned value of
+                        the remote method.
+        :type  errback: callable
+        :arg   errback: A function to be called with an error occurred
+                        in the remote method.  It is either an instance
+                        of :class:`ReturnError` or :class:`EPCError`.
+
+        """
+        self.callmanager.call(self, name, *args, **kwds)
+
+    def methods(self, *args, **kwds):
+        """
+        Request info of callable remote methods.
+
+        Arguments for :meth:`call` except for `name` can be applied to
+        this function too.
+
+        """
+        self.callmanager.methods(self, *args, **kwds)
+
+    @staticmethod
+    def _blocking_request(call, timeout, *args):
+        bc = BlockingCallback()
+        call(*args, **bc.cbs)
+        return bc.result(timeout=timeout)
+
+    def call_sync(self, name, args, timeout=None):
+        """
+        Blocking version of :meth:`call`.
+
+        :type    name: str
+        :arg     name: Remote function name to call.
+        :type    args: list
+        :arg     args: Arguments passed to the remote function.
+        :type timeout: int or None
+        :arg  timeout: Timeout in second.  None means no timeout.
+
+        If the called remote function raise an exception, this method
+        raise an exception.  If you give `timeout`, this method may
+        raise an `Empty` exception.
+
+        """
+        return self._blocking_request(self.call, timeout, name, args)
+
+    def methods_sync(self, timeout=None):
+        """
+        Blocking version of :meth:`methods`.  See also :meth:`call_sync`.
+        """
+        return self._blocking_request(self.methods, timeout)
+
+
+class ThreadingEPCHandler(EPCHandler):
+
+    def _handle(self, sexp):
+        newthread(self, target=EPCHandler._handle, args=(self, sexp)).start()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/py3compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/py3compat.py
new file mode 100644
index 00000000..ba5d3c47
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/py3compat.py
@@ -0,0 +1,58 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import sys
+PY3 = (sys.version_info[0] >= 3)
+
+try:
+    import SocketServer
+except:
+    import socketserver as SocketServer
+
+try:
+    import SimpleXMLRPCServer
+except:
+    import xmlrpc.server as SimpleXMLRPCServer
+
+try:
+    import Queue
+except:
+    import queue as Queue
+
+
+try:
+    from contextlib import nested
+except ImportError:
+    from contextlib import contextmanager
+
+    @contextmanager
+    def nested(*managers):
+        if managers:
+            with managers[0] as ctx:
+                with nested(*managers[1:]) as rest:
+                    yield (ctx,) + rest
+        else:
+            yield ()
+
+
+if PY3:
+    utf8 = lambda s: s
+else:
+    utf8 = lambda s: s.decode('utf-8')
+
+utf8.__doc__ = """
+Decode a raw string into unicode object.  Do nothing in Python 3.
+"""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/server.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/server.py
new file mode 100644
index 00000000..555d3cd8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/server.py
@@ -0,0 +1,225 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import sys
+import logging
+
+from .py3compat import SocketServer
+from .utils import autolog, deprecated
+from .core import EPCCore
+from .handler import EPCHandler, ThreadingEPCHandler
+
+
+@deprecated
+def setuplogfile(logger=None, filename='python-epc.log'):
+    if logger is None:
+        from .core import _logger as logger
+    ch = logging.FileHandler(filename=filename, mode='w')
+    ch.setLevel(logging.DEBUG)
+    logger.addHandler(ch)
+
+
+class EPCClientManager:
+
+    # This class will be mixed with `SocketServer.TCPServer`,
+    # which is an old style class.
+
+    def __init__(self):
+        self.clients = []
+        """
+        A list of :class:`EPCHandler` object for connected clients.
+        """
+
+    def add_client(self, handler):
+        self.clients.append(handler)
+        self.handle_client_connect(handler)
+
+    def remove_client(self, handler):
+        self.clients.remove(handler)
+        self.handle_client_disconnect(handler)
+
+    def handle_client_connect(self, handler):
+        """
+        Handler which is called with a newly connected `client`.
+
+        :type  handler: :class:`EPCHandler`
+        :arg   handler: Object for handling request from the client.
+
+        Default implementation does nothing.
+
+        """
+
+    def handle_client_disconnect(self, handler):
+        """
+        Handler which is called with a disconnected `client`.
+
+        :type  handler: :class:`EPCHandler`
+        :arg   handler: Object for handling request from the client.
+
+        Default implementation does nothing.
+
+        """
+
+
+class EPCServer(SocketServer.TCPServer, EPCClientManager,
+                EPCCore):
+
+    """
+    A server class to publish functions and call functions via EPC protocol.
+
+    To publish Python functions, all you need is
+    :meth:`register_function`,
+    :meth:`print_port` and
+    :meth:`serve_forever() <SocketServer.BaseServer.serve_forever>`.
+
+    >>> server = EPCServer(('localhost', 0))
+    >>> def echo(*a):
+    ...     return a
+    >>> server.register_function(echo)                 #doctest: +ELLIPSIS
+    <function echo at 0x...>
+    >>> server.print_port()                                #doctest: +SKIP
+    9999
+    >>> server.serve_forever()                             #doctest: +SKIP
+
+    To call client's method, use :attr:`clients <EPCClientManager.clients>`
+    attribute to get client handler and use its :meth:`EPCHandler.call` and
+    :meth:`EPCHandler.methods` methods to communicate with connected client.
+
+    >>> handler = server.clients[0]                        #doctest: +SKIP
+    >>> def callback(reply):
+    ...     print(reply)
+    >>> handler.call('method_name', ['arg-1', 'arg-2', 'arg-3'],
+    ...              callback)                             #doctest: +SKIP
+
+    See :class:`SocketServer.TCPServer` and :class:`SocketServer.BaseServer`
+    for other usable methods.
+
+    """
+
+    def __init__(self, server_address,
+                 RequestHandlerClass=EPCHandler,
+                 bind_and_activate=True,
+                 debugger=None, log_traceback=False):
+        # `BaseServer` (super class of `SocketServer`) will set
+        # `RequestHandlerClass` to the attribute `self.RequestHandlerClass`.
+        # This class is initialize in `BaseServer.finish_request` by
+        # `self.RequestHandlerClass(request, client_address, self)`.
+        SocketServer.TCPServer.__init__(
+            self, server_address, RequestHandlerClass, bind_and_activate)
+        EPCClientManager.__init__(self)
+        EPCCore.__init__(self, debugger, log_traceback)
+        self.logger.debug('-' * 75)
+        self.logger.debug(
+            "EPCServer is initialized: server_address = %r",
+            self.server_address)
+
+    @autolog('debug')
+    def handle_error(self, request, client_address):
+        self.logger.error('handle_error: trying to get traceback.format_exc')
+        try:
+            import traceback
+            self.logger.error('handle_error: \n%s', traceback.format_exc())
+        except:
+            self.logger.error('handle_error: OOPS')
+
+    def print_port(self, stream=sys.stdout):
+        """
+        Print port this EPC server runs on.
+
+        As Emacs client reads port number from STDOUT, you need to
+        call this just before calling :meth:`serve_forever`.
+
+        :type stream: text stream
+        :arg  stream: A stream object to write port on.
+                      Default is :data:`sys.stdout`.
+
+        """
+        stream.write(str(self.server_address[1]))
+        stream.write("\n")
+        stream.flush()
+
+
+class ThreadingEPCServer(SocketServer.ThreadingMixIn, EPCServer):
+
+    """
+    Class :class:`EPCServer` mixed with :class:`SocketServer.ThreadingMixIn`.
+
+    Use this class when combining EPCServer with other Python module
+    which has event loop, such as GUI modules.  For example, see
+    `examples/gtk/server.py`_ for how to use this class with GTK
+
+    .. _examples/gtk/server.py:
+       https://github.com/tkf/python-epc/blob/master/examples/gtk/server.py
+
+    """
+
+    def __init__(self, *args, **kwds):
+        kwds.update(RequestHandlerClass=ThreadingEPCHandler)
+        EPCServer.__init__(self, *args, **kwds)
+
+
+def main(args=None):
+    """
+    Quick CLI to serve Python functions in a module.
+
+    Example usage::
+
+        python -m epc.server --allow-dotted-names os
+
+    Note that only the functions which gets and returns simple
+    built-in types (str, int, float, list, tuple, dict) works.
+
+    """
+    import argparse
+    from textwrap import dedent
+    parser = argparse.ArgumentParser(
+        formatter_class=type('EPCHelpFormatter',
+                             (argparse.ArgumentDefaultsHelpFormatter,
+                              argparse.RawDescriptionHelpFormatter),
+                             {}),
+        description=dedent(main.__doc__))
+    parser.add_argument(
+        'module', help='Serve python functions in this module.')
+    parser.add_argument(
+        '--address', default='localhost',
+        help='server address')
+    parser.add_argument(
+        '--port', default=0, type=int,
+        help='server port. 0 means to pick up random port.')
+    parser.add_argument(
+        '--allow-dotted-names', default=False, action='store_true')
+    parser.add_argument(
+        '--pdb', dest='debugger', const='pdb', action='store_const',
+        help='start pdb when error occurs.')
+    parser.add_argument(
+        '--ipdb', dest='debugger', const='ipdb', action='store_const',
+        help='start ipdb when error occurs.')
+    parser.add_argument(
+        '--log-traceback', action='store_true', default=False)
+    ns = parser.parse_args(args)
+
+    server = EPCServer((ns.address, ns.port),
+                       debugger=ns.debugger,
+                       log_traceback=ns.log_traceback)
+    server.register_instance(
+        __import__(ns.module),
+        allow_dotted_names=ns.allow_dotted_names)
+    server.print_port()
+    server.serve_forever()
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__init__.py
new file mode 100644
index 00000000..3c5738f7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__init__.py
@@ -0,0 +1,14 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..42b1ba1f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_client.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_client.cpython-37.pyc
new file mode 100644
index 00000000..fa0a49cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_client.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_dispatcher.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_dispatcher.cpython-37.pyc
new file mode 100644
index 00000000..4001af86
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_dispatcher.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_py2py.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_py2py.cpython-37.pyc
new file mode 100644
index 00000000..8ebe0a5d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_py2py.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_server.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_server.cpython-37.pyc
new file mode 100644
index 00000000..ae514606
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_server.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_utils.cpython-37.pyc
new file mode 100644
index 00000000..594b5237
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/test_utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..67f39acf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_client.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_client.py
new file mode 100644
index 00000000..278111df
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_client.py
@@ -0,0 +1,164 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import io
+
+from sexpdata import Symbol
+
+from ..client import EPCClient
+from ..handler import encode_message, unpack_message, BlockingCallback, \
+    ReturnError, EPCError
+from ..py3compat import Queue
+from .utils import BaseTestCase
+
+
+class FakeFile(object):
+    pass
+
+
+class FakeSocket(object):
+
+    def __init__(self):
+        self._queue = Queue.Queue()
+        self._buffer = io.BytesIO()
+        self.sent_message = Queue.Queue()
+        self._alive = True
+
+    def makefile(self, mode, *_):
+        ff = FakeFile()
+        ff.closed = False
+        ff.close = lambda: None
+        ff.flush = lambda: None
+        if 'r' in mode:
+            ff.read = self.recv
+            return ff
+        elif 'w' in mode:
+            ff.write = self.sendall
+            return ff
+
+    def append(self, byte):
+        self._queue.put(byte)
+
+    def _pull(self):
+        byte = self._queue.get()
+        pos = self._buffer.tell()
+        self._buffer.write(byte)
+        self._buffer.seek(pos)
+
+    def recv(self, bufsize):
+        while True:
+            if not self._alive:
+                return ''
+            got = self._buffer.read(bufsize)
+            if got:
+                return got
+            # Do not go to the next loop until some byte is appended
+            # to the queue:
+            self._pull()
+
+    def sendall(self, string):
+        self.sent_message.put(string)
+
+    def close(self):
+        self._alive = False
+        self.append(''.encode('ascii'))
+
+
+class TestClient(BaseTestCase):
+
+    def setUp(self):
+        self.fsock = FakeSocket()
+        self.next_reply = []
+        self.client = EPCClient(self.fsock)
+
+        @self.client.register_function
+        def echo(*a):
+            """Return argument unchanged."""
+            return a
+
+    def tearDown(self):
+        self.client.socket.close()  # connection is closed by server
+
+    def set_next_reply(self, *args):
+        self.next_reply.append(encode_message(*args))
+
+    def request(self, name, *args):
+        bc = BlockingCallback()
+        getattr(self.client, name)(*args, **bc.cbs)
+        self.fsock.append(self.next_reply.pop(0))  # reply comes after call!
+        return bc.result(timeout=self.timeout)
+
+    def sent_message(self):
+        raw = self.fsock.sent_message.get(timeout=self.timeout)
+        (name, uid, rest) = unpack_message(raw[6:])
+        if name == 'call':
+            rest[0] = rest[0].value()
+        return [name, uid] + rest
+
+    def check_sent_message(self, name, uid, args):
+        sent = self.sent_message()
+        self.assertEqual(sent, [name, uid] + list(args))
+
+    def check_return(self, desired_return, name, *args):
+        uid = 1
+        self.set_next_reply('return', uid, desired_return)
+        got = self.request(name, *args)
+        self.assertEqual(got, desired_return)
+        self.check_sent_message(name, uid, args)
+
+    def test_call_return(self):
+        self.check_return('some value', 'call', 'dummy', [1, 2, 3])
+
+    def test_methods_return(self):
+        self.check_return([[Symbol('dummy'), [], "document"]], 'methods')
+
+    def check_return_error(self, reply_name, name, *args):
+        uid = 1
+        reply = 'error value'
+        eclass = ReturnError if reply_name == 'return-error' else EPCError
+        error = eclass(reply)
+        self.set_next_reply(reply_name, uid, reply)
+        try:
+            self.request(name, *args)
+            assert False, 'self.client.{0}({1}) should raise an error' \
+                .format(name, args)
+        except Exception as got:
+            self.assertIsInstance(got, type(error))
+            self.assertEqual(got.args, error.args)
+        self.check_sent_message(name, uid, args)
+
+    def test_call_return_error(self):
+        self.check_return_error('return-error', 'call', 'dummy', [1, 2, 3])
+
+    def test_call_epc_error(self):
+        self.check_return_error('epc-error', 'call', 'dummy', [1, 2, 3])
+
+    def test_methods_return_error(self):
+        self.check_return_error('return-error', 'methods')
+
+    def test_methods_epc_error(self):
+        self.check_return_error('epc-error', 'methods')
+
+    def test_echo(self):
+        uid = 1
+        self.fsock.append(encode_message('call', uid, Symbol('echo'), [55]))
+        self.check_sent_message('return', uid, [[55]])
+
+
+class TestClientClosedByClient(TestClient):
+
+    def tearDown(self):
+        self.client.close()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_dispatcher.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_dispatcher.py
new file mode 100644
index 00000000..cbce618b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_dispatcher.py
@@ -0,0 +1,58 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from ..core import EPCDispatcher
+from .utils import BaseTestCase
+
+
+class Dummy(object):
+    pass
+
+
+class TestEPCDispatcher(BaseTestCase):
+
+    def setUp(self):
+        self.dispatcher = EPCDispatcher()
+
+    def test_register_module(self):
+        import os
+        self.dispatcher.register_instance(os)
+        self.assertIs(self.dispatcher.get_method('chmod'), os.chmod)
+
+    def test_register_module_with_dotted_names(self):
+        import os
+        self.dispatcher.register_instance(os, allow_dotted_names=True)
+        self.assertIs(self.dispatcher.get_method('path.join'), os.path.join)
+
+    def test_error_on_private_method_access(self):
+        obj = Dummy()
+        obj._private_method = lambda: None
+        obj.sub = Dummy()
+        obj.sub._private_attribute = Dummy()
+        obj.sub._private_attribute.some_method = lambda: None
+        self.dispatcher.register_instance(obj, allow_dotted_names=True)
+        self.assertRaises(AttributeError, self.dispatcher.get_method,
+                          '_private_method')
+        self.assertRaises(AttributeError, self.dispatcher.get_method,
+                          'obj.sub._private_attribute.some_method')
+
+    def test_instance_get_method(self):
+        always_me = lambda: None
+        obj = Dummy()
+        obj._get_method = lambda _: always_me
+        self.dispatcher.register_instance(obj)
+        self.assertIs(self.dispatcher.get_method('x'), always_me)
+        self.assertIs(self.dispatcher.get_method('y'), always_me)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_py2py.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_py2py.py
new file mode 100644
index 00000000..88d2ca72
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_py2py.py
@@ -0,0 +1,205 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import os
+import nose
+
+from ..client import EPCClient
+from ..server import ThreadingEPCServer
+from ..handler import ReturnError
+from ..utils import newthread, callwith
+from ..py3compat import Queue
+from .utils import BaseTestCase, logging_to_stdout
+
+
+def next_fib(x, fib):
+    if x < 2:
+        return x
+    return fib(x - 1) + fib(x - 2)
+
+
+def fib(x):
+    return next_fib(x, fib)
+
+
+class ThreadingPy2Py(object):
+
+    """
+    A class to setup connected EPC server and client in one process.
+
+    This class is useful to use as a mix-in for test cases.
+
+    """
+
+    def setup_connection(self, **kwds):
+        self.server = ThreadingEPCServer(('localhost', 0), **kwds)
+        self.server.daemon_threads = True
+        self.server_thread = newthread(self, target=self.server.serve_forever)
+        self.server_thread.start()
+
+        self.client_queue = q = Queue.Queue()
+        self.server.handle_client_connect = q.put
+
+        self.client = EPCClient(self.server.server_address, **kwds)
+
+    def teardown_connection(self):
+        self.client.close()
+        self.server.shutdown()
+        self.server.server_close()
+
+    def wait_until_client_is_connected(self):
+        if not self.client_ready:
+            self.client_queue.get(timeout=1)
+            self.client_ready = True
+
+    client_ready = False
+
+
+class TestEPCPy2Py(ThreadingPy2Py, BaseTestCase):
+
+    def setUp(self):
+        ThreadingEPCServer.allow_reuse_address = True
+        self.setup_connection()
+
+        @self.client.register_function
+        @self.server.register_function
+        def echo(*a):
+            """Return argument unchanged."""
+            return a
+
+        @self.client.register_function
+        @self.server.register_function
+        def bad_method(*_):
+            """This is a bad method.  Don't call!"""
+            raise ValueError("This is a bad method!")
+
+        @self.server.register_function
+        def ping_server(x):
+            return self.server.clients[0].call_sync('pong_client', [x])
+
+        @self.client.register_function
+        def pong_client(x):
+            return self.client.call_sync('echo', [x])
+
+        @self.client.register_function
+        def ping_client(x):
+            return self.client.call_sync('pong_server', [x])
+
+        @self.server.register_function
+        def pong_server(x):
+            return self.server.clients[0].call_sync('echo', [x])
+
+        @self.server.register_function
+        def fib_server(x):
+            c = self.server.clients[0].call_sync
+            return next_fib(x, lambda x: c('fib_client', [x]))
+
+        @self.client.register_function
+        def fib_client(x):
+            c = self.client.call_sync
+            return next_fib(x, lambda x: c('fib_server', [x]))
+
+    def tearDown(self):
+        self.teardown_connection()
+
+    def assert_call_return(self, call, method, args, reply, **kwds):
+        timeout = kwds.get('timeout', self.timeout)
+        self.assertEqual(call(method, args, timeout=timeout), reply)
+
+    def assert_client_return(self, method, args, reply, **kwds):
+        self.assert_call_return(self.client.call_sync,
+                                method, args, reply, **kwds)
+
+    def assert_server_return(self, method, args, reply, **kwds):
+        self.wait_until_client_is_connected()
+        self.assert_call_return(self.server.clients[0].call_sync,
+                                method, args, reply, **kwds)
+
+    def check_bad_method(self, call_sync):
+        cm = logging_to_stdout(self.server.logger)
+        call_sync = callwith(cm)(call_sync)
+        self.assertRaises(ReturnError, call_sync, 'bad_method', [55])
+
+    def test_client_calls_server_echo(self):
+        self.assert_client_return('echo', [55], [55])
+
+    def test_client_calls_server_bad_method(self):
+        self.check_bad_method(self.client.call_sync)
+
+    def test_server_calls_client_echo(self):
+        self.assert_server_return('echo', [55], [55])
+
+    def test_server_calls_client_bad_method(self):
+        self.wait_until_client_is_connected()
+        self.check_bad_method(self.server.clients[0].call_sync)
+
+    max_message_limit = int('f' * 6, 16) + 1  # 16MB
+    large_data_limit = max_message_limit \
+        / float(os.getenv('PYEPC_TEST_LARGE_DATA_DISCOUNT', '128'))
+    large_data_limit = int(large_data_limit)
+    """
+    Environment variable PYEPC_TEST_LARGE_DATA_DISCOUNT controls
+    how large "large data" must be.  Default is ``2 ** 7`` times
+    smaller than the maximum message length (16 MB).  Setting
+    it to 1 must *not* fail.  However, it takes long time to finish
+    the test (typically 100 sec when I tried).  Setting this value
+    to less than one (e.g., 0.9) *must* fail the tests.
+    """
+
+    def check_large_data(self, assert_return):
+        margin = 100  # for parenthesis, "call", uid, etc.
+        data = "x" * (self.large_data_limit - margin)
+        timeout = self.timeout * 100
+        assert_return('echo', [data], [data], timeout=timeout)
+
+    def test_client_sends_large_data(self):
+        self.check_large_data(self.assert_client_return)
+
+    def test_server_sends_large_data(self):
+        self.check_large_data(self.assert_server_return)
+
+    def test_client_ping_pong(self):
+        self.assert_client_return('ping_server', [55], [55])
+
+    def test_server_ping_pong(self):
+        self.assert_server_return('ping_client', [55], [55])
+
+    def test_client_close_should_not_fail_even_if_not_used(self):
+        pass
+
+    fibonacci = list(map(fib, range(12)))
+    fibonacci_min = 2
+    """
+    The Fibonacci test must succeeds at least until this index.
+    """
+
+    def check_fib(self, assert_return, method):
+        try:
+            for (i, f) in enumerate(self.fibonacci):
+                assert_return(method, [i], f)
+        except Queue.Empty:
+            if i > self.fibonacci_min:
+                raise nose.SkipTest(
+                    "Test for {0} fails at {1} (> {2}), but it's OK."
+                    .format(method, i, self.fibonacci_min))
+            else:
+                raise   # not OK
+
+    def test_client_fib(self):
+        self.check_fib(self.assert_client_return, 'fib_server')
+
+    def test_server_fib(self):
+        self.check_fib(self.assert_server_return, 'fib_client')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_server.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_server.py
new file mode 100644
index 00000000..e44a796e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_server.py
@@ -0,0 +1,323 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import socket
+
+from sexpdata import Symbol, loads
+
+from ..server import ThreadingEPCServer
+from ..utils import newthread
+from ..handler import encode_string, encode_object, BlockingCallback, \
+    ReturnError, EPCError, ReturnErrorCallerUnknown, EPCErrorCallerUnknown, \
+    CallerUnknown
+from ..py3compat import utf8, Queue, nested
+from .utils import mockedattr, logging_to_stdout, CaptureStdIO, BaseTestCase, \
+    streamio
+
+
+class TestEPCServerMisc(BaseTestCase):
+
+    """
+    Test that can be done without client.
+    """
+
+    def setUp(self):
+        # See: http://stackoverflow.com/questions/7720953
+        ThreadingEPCServer.allow_reuse_address = True
+        self.server = ThreadingEPCServer(('localhost', 0))
+        self.server_thread = newthread(self, target=self.server.serve_forever)
+        self.server_thread.start()
+
+    def tearDown(self):
+        self.server.shutdown()
+        self.server.server_close()
+
+    def test_print_port(self):
+        stream = streamio()
+        self.server.print_port(stream)
+        self.assertEqual(stream.getvalue(),
+                         '{0}\n'.format(self.server.server_address[1]))
+
+
+class BaseEPCServerTestCase(BaseTestCase):
+
+    def setUp(self):
+        # See: http://stackoverflow.com/questions/7720953
+        ThreadingEPCServer.allow_reuse_address = True
+        self.server = ThreadingEPCServer(('localhost', 0))
+        self.server_thread = newthread(self, target=self.server.serve_forever)
+        self.server_thread.start()
+
+        def echo(*a):
+            """Return argument unchanged."""
+            return a
+
+        def bad_method(*_):
+            """This is a bad method.  Don't call!"""
+            raise self.error_to_throw
+        self.error_to_throw = ValueError("This is a bad method!")
+
+        self.server.register_function(echo)
+        self.server.register_function(bad_method)
+
+        self.client = socket.create_connection(self.server.server_address)
+        self.client.settimeout(self.timeout)
+
+    def tearDown(self):
+        self.client.shutdown(socket.SHUT_RDWR)
+        self.client.close()
+        self.server.shutdown()
+        self.server.server_close()
+
+    def receive_message(self):
+        result = self.client.recv(1024)
+        self.assertEqual(int(result[:6], 16), len(result[6:]))
+        return loads(result[6:].decode())  # skip the length part
+
+    def client_send(self, string):
+        self.client.send(encode_string(string))
+
+    def check_echo(self):
+        self.client_send('(call 1 echo (55))')
+        result = self.client.recv(1024)
+        self.assertEqual(encode_string('(return 1 (55))'), result)
+
+
+class TestEPCServerRequestHandling(BaseEPCServerTestCase):
+
+    """
+    Test that EPCServer handles request from client properly.
+    """
+
+    def test_echo(self):
+        self.check_echo()
+
+    def test_error_in_method(self):
+        with logging_to_stdout(self.server.logger):
+            self.client_send('(call 2 bad_method nil)')
+            result = self.client.recv(1024)
+        expected = encode_object([
+            Symbol('return-error'), 2, repr(self.error_to_throw)])
+        self.assertEqual(result, expected)
+
+    def test_no_such_method(self):
+        with logging_to_stdout(self.server.logger):
+            self.client_send('(call 3 no_such_method nil)')
+            reply = self.receive_message()
+        self.assertEqual(reply[0], Symbol('epc-error'))
+        self.assertEqual(reply[1], 3)
+        assert 'No such method' in reply[2]
+
+    def test_methods(self):
+        self.client_send('(methods 4)')
+        reply = self.receive_message()
+        self.assertEqual(reply[0], Symbol('return'))
+        self.assertEqual(reply[1], 4)
+        method = dict((m[0].value(), m[1:]) for m in reply[2])
+        self.assertEqual(set(method), set(['echo', 'bad_method']))
+
+        actual_docs = dict(
+            (n, doc) for (n, (_, doc)) in method.items())
+        desired_docs = dict(
+            (n, f.__doc__) for (n, f) in self.server.funcs.items())
+        self.assertEqual(actual_docs, desired_docs)
+
+    def test_unicode_message(self):
+        s = "日本語能力!!ソﾊﾝｶｸ"
+        self.client_send(utf8('(call 1 echo ("{0}"))'.format(s)))
+        result = self.client.recv(1024)
+        self.assertEqual(encode_string(utf8('(return 1 ("{0}"))'.format(s))),
+                         result)
+
+    def test_invalid_sexp(self):
+        with logging_to_stdout(self.server.logger):
+            self.client_send('(((invalid sexp!')
+            reply = self.receive_message()
+        self.assertEqual(reply[0].value(), Symbol('epc-error').value())
+        self.assertEqual(reply[1], [])  # uid
+        assert 'Not enough closing brackets.' in reply[2]
+
+    def check_caller_unkown(self, message, eclass, eargs):
+        self.check_echo()  # to establish connection to client
+        called_with = Queue.Queue()
+        with nested(mockedattr(self.server.clients[0],
+                               'handle_error', called_with.put),
+                    logging_to_stdout(self.server.logger)):
+            self.client_send(message)
+            error = called_with.get(True, 1)
+        self.assertIsInstance(error, eclass)
+        self.assertEqual(error.args, eargs)
+
+    def test_return_caller_unkown(self):
+        self.check_caller_unkown(
+            '(return 0 ("some" "value"))',  # uid=0 is always unkown
+            CallerUnknown, (['some', 'value'],))
+
+    def test_return_error_caller_unkown(self):
+        self.check_caller_unkown(
+            '(return-error nil "message")',
+            ReturnErrorCallerUnknown, ('message',))
+
+    def test_epc_error_caller_unkown(self):
+        self.check_caller_unkown(
+            '(epc-error nil "message")',
+            EPCErrorCallerUnknown, ('message',))
+
+    def check_invalid_call(self, make_call):
+
+        # These are not necessary for the actual test, but rather
+        # to make sure that the server stays in the context of
+        # `logging_to_stdout` until the error is handled.  See
+        # `called_with.get` below.
+        def handle_error(err):
+            self.assertTrue(orig_handle_error(err))
+            called_with.put(err)
+            return True
+        self.check_echo()  # to fetch handler
+        handler = self.server.clients[0]
+        orig_handle_error = handler.handle_error
+        called_with = Queue.Queue()
+
+        # Here comes the actual test:
+        uid = 1
+        with nested(logging_to_stdout(self.server.logger),
+                    mockedattr(handler, 'handle_error', handle_error)):
+            self.client_send(make_call(uid))
+            reply = self.receive_message()
+            called_with.get(timeout=1)  # wait until the error got handled
+        self.assertEqual(reply[0], Symbol('epc-error'))
+        self.assertEqual(reply[1], uid)
+
+    def test_invalid_call_not_enough_arguments(self):
+        self.check_invalid_call('(call {0} echo)'.format)
+
+    def test_invalid_call_too_many_arguments(self):
+        self.check_invalid_call(
+            '(call {0} echo "value" "extra" "value")'.format)
+
+    def test_invalid_methods_too_many_arguments(self):
+        self.check_invalid_call('(methods {0} "extra value")'.format)
+
+    def test_log_traceback(self):
+        stdio = CaptureStdIO()
+        with nested(stdio, mockedattr(self.server, 'log_traceback', True)):
+            self.test_error_in_method()
+        log = stdio.read_stdout()
+        self.assertIn('ValueError: This is a bad method!', log)
+        self.assertIn('raise self.error_to_throw', log)
+
+
+class TestEPCServerCallClient(BaseEPCServerTestCase):
+
+    def setUp(self):
+        super(TestEPCServerCallClient, self).setUp()
+        self.check_echo()  # to start connection, client must send something
+        self.handler = self.server.clients[0]
+
+        self.callback_called_with = Queue.Queue()
+        self.callback = self.callback_called_with.put
+
+        self.errback_called_with = Queue.Queue()
+        self.errback = self.errback_called_with.put
+
+    def check_call_client_dummy_method(self):
+        (call, uid, meth, args) = self.receive_message()
+        self.assertIsInstance(uid, int)
+        self.assertEqual([call, uid, meth, args],
+                         [Symbol('call'), uid, Symbol('dummy'), [55]])
+        return uid
+
+    def test_call_client_dummy_method(self):
+        self.handler.call('dummy', [55], self.callback, self.errback)
+        uid = self.check_call_client_dummy_method()
+        self.client_send('(return {0} 123)'.format(uid))
+        reply = self.callback_called_with.get(True, 1)
+        self.assertEqual(reply, 123)
+
+    def test_call_client_methods_info(self):
+        self.handler.methods(self.callback)
+        (methods, uid) = self.receive_message()
+        self.assertEqual(methods.value(), 'methods')
+        self.client_send('(return {0} ((dummy () "")))'.format(uid))
+        reply = self.callback_called_with.get(True, 1)
+        self.assertEqual(reply, [[Symbol('dummy'), [], ""]])
+
+    def client_send_error(self, ename, uid, message):
+        self.client_send('({0} {1} "{2}")'.format(ename, uid, message))
+
+    def check_call_client_error(self, ename, eclass, message=utf8("message")):
+        self.handler.call('dummy', [55], self.callback, self.errback)
+        uid = self.check_call_client_dummy_method()
+        self.client_send_error(ename, uid, message)
+        reply = self.errback_called_with.get(True, 1)
+        self.assertIsInstance(reply, eclass)
+        self.assertEqual(reply.args, (message,))
+
+    def test_call_client_return_error(self):
+        self.check_call_client_error('return-error', ReturnError)
+
+    def test_call_client_epc_error(self):
+        self.check_call_client_error('epc-error', EPCError)
+
+    def check_dont_send_error_back(self, ename, eclass,
+                                   message=utf8("message")):
+        self.handler.call('dummy', [55])  # no callbacks!
+        uid = self.check_call_client_dummy_method()
+        with logging_to_stdout(self.server.logger):
+            self.client_send_error(ename, uid, message)
+            try:
+                result = self.client.recv(1024)
+                self.assertEqual(result, '')  # nothing goes to client
+            except socket.timeout:
+                pass
+
+    def test_dont_send_return_error_back(self):
+        self.check_dont_send_error_back('return-error', ReturnError)
+
+    def test_dont_send_epc_error_back(self):
+        self.check_dont_send_error_back('epc-error', EPCError)
+
+    def check_invalid_reply(self, make_reply, should_raise=EPCError):
+        bc = BlockingCallback()
+        self.handler.call('dummy', [55], **bc.cbs)
+        uid = self.check_call_client_dummy_method()
+        with logging_to_stdout(self.server.logger):
+            self.client_send(make_reply(uid))
+            self.assertRaises(should_raise, bc.result, timeout=self.timeout)
+
+    def test_invalid_return_not_enough_arguments(self):
+        self.check_invalid_reply('(return {0})'.format)
+
+    def test_invalid_return_too_many_arguments(self):
+        self.check_invalid_reply(
+            '(return {0} "value" "extra" "value")'.format)
+
+    def test_invalid_return_error_not_enough_arguments(self):
+        self.check_invalid_reply('(return-error {0})'.format, ReturnError)
+
+    def test_invalid_return_error_too_many_arguments(self):
+        self.check_invalid_reply(
+            '(return-error {0} "value" "extra" "value")'.format,
+            ReturnError)
+
+    def test_invalid_epc_error_not_enough_arguments(self):
+        self.check_invalid_reply('(epc-error {0})'.format)
+
+    def test_invalid_epc_error_too_many_arguments(self):
+        self.check_invalid_reply(
+            '(epc-error {0} "value" "extra" "value")'.format)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_utils.py
new file mode 100644
index 00000000..a485f0ca
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/test_utils.py
@@ -0,0 +1,63 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from ..utils import ThreadedIterator, LockingDict
+
+from .utils import BaseTestCase
+
+
+class TestThreadedIterator(BaseTestCase):
+
+    def check_identity(self, iterable):
+        lst = list(iterable)
+        self.assertEqual(list(ThreadedIterator(lst)), lst)
+
+    def test_empty(self):
+        self.check_identity([])
+
+    def test_range_1(self):
+        self.check_identity(range(1))
+
+    def test_range_7(self):
+        self.check_identity(range(7))
+
+
+class TestLockingDict(BaseTestCase):
+
+    def setUp(self):
+        self.ld = LockingDict()
+
+    def check_set_items(self, items):
+        for (k, v) in items:
+            self.ld[k] = v
+        self.assertEqual(dict(**self.ld), dict(items))
+
+    def test_simple_set_items(self):
+        self.check_set_items(dict(a=1, b=2, c=3).items())
+
+    def test_simple_del_items(self):
+        self.test_simple_set_items()
+        ld = self.ld
+        del ld['a']
+        del ld['b']
+        self.assertEqual(dict(**self.ld), dict(c=3))
+
+    def test_simple_pop_items(self):
+        self.test_simple_set_items()
+        ld = self.ld
+        self.assertEqual(ld.pop('a'), 1)
+        self.assertEqual(ld.pop('b'), 2)
+        self.assertEqual(dict(**self.ld), dict(c=3))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/utils.py
new file mode 100644
index 00000000..c6815c64
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/tests/utils.py
@@ -0,0 +1,127 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import os
+import sys
+import functools
+import io
+
+try:
+    import unittest
+    unittest.TestCase.assertIs
+except AttributeError:
+    import unittest2 as unittest
+from contextlib import contextmanager
+
+from ..py3compat import Queue, PY3
+from ..utils import newthread
+
+
+@contextmanager
+def mockedattr(object, name, replace):
+    """
+    Mock `object.name` attribute using `replace`.
+    """
+    original = getattr(object, name)
+    try:
+        setattr(object, name, replace)
+        yield
+    finally:
+        setattr(object, name, original)
+
+
+def logging_to_stdout(logger):
+    # it assumes that 0-th hander is the only one stream handler...
+    return mockedattr(logger.handlers[0], 'stream', sys.stdout)
+
+
+def streamio():
+    """
+    Return `io.StringIO` for Python 3, otherwise `io.BytesIO`.
+    """
+    if PY3:
+        return io.StringIO()
+    else:
+        return io.BytesIO()
+
+
+class CaptureStdIO(object):
+
+    def __enter__(self):
+        self._orig_stdin = sys.stdin
+        self._orig_stdout = sys.stdout
+        self._orig_stderr = sys.stderr
+
+        self.stdin = sys.stdin = streamio()
+        self.stdout = sys.stdout = streamio()
+        self.stderr = sys.stderr = streamio()
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        sys.stdin = self._orig_stdin
+        sys.stdout = self._orig_stdout
+        sys.stderr = self._orig_stderr
+
+    def read_stdout(self):
+        self.stdout.seek(0)
+        return self.stdout.read()
+
+    def read_stderr(self):
+        self.stderr.seek(0)
+        return self.stderr.read()
+
+
+class BaseTestCase(unittest.TestCase):
+
+    TRAVIS = os.getenv('TRAVIS')
+
+    if TRAVIS:
+        timeout = 10
+    else:
+        timeout = 1
+
+
+def skip(reason):
+    from nose import SkipTest
+
+    def decorator(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kwds):
+            raise SkipTest("Skipping {0} because: {1}"
+                           .format(func.__name__, reason))
+        return wrapper
+    return decorator
+
+
+def post_mortem_in_thread(traceback):
+    """
+    `pdb.post_mortem` that can be used in a daemon thread.
+
+    Put the following in the `except`-block::
+
+        import sys
+        from epc.tests.utils import post_mortem_in_thread
+        exc_info = sys.exc_info()
+        post_mortem_in_thread(exc_info[2])
+
+    """
+    import pdb
+    blocker = Queue.Queue()
+    thread = newthread(target=blocker.get)
+    thread.daemon = False
+    thread.start()
+    pdb.post_mortem(traceback)
+    blocker.put(None)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/utils.py
new file mode 100644
index 00000000..ec3570c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/epc/utils.py
@@ -0,0 +1,155 @@
+# Copyright (C) 2012-  Takafumi Arakaki
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import logging
+import itertools
+import functools
+import threading
+import warnings
+
+from .py3compat import Queue
+
+
+def func_call_as_str(name, *args, **kwds):
+    """
+    Return arguments and keyword arguments as formatted string
+
+    >>> func_call_as_str('f', 1, 2, a=1)
+    'f(1, 2, a=1)'
+
+    """
+    return '{0}({1})'.format(
+        name,
+        ', '.join(itertools.chain(
+            map('{0!r}'.format, args),
+            map('{0[0]!s}={0[1]!r}'.format, sorted(kwds.items())))))
+
+
+def autolog(level):
+    if isinstance(level, str):
+        level = getattr(logging, level.upper())
+
+    def wrapper(method):
+        @functools.wraps(method)
+        def new_method(self, *args, **kwds):
+            funcname = ".".join([self.__class__.__name__, method.__name__])
+            self.logger.log(level, "(AutoLog) Called: %s",
+                            func_call_as_str(funcname, *args, **kwds))
+            ret = method(self, *args, **kwds)
+            self.logger.log(level, "(AutoLog) Returns: %s(...) = %r",
+                            funcname, ret)
+            return ret
+        return new_method
+    return wrapper
+
+
+def deprecated(func):
+    """
+    Decorator for marking function as deprecated
+    """
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        warnings.warn(
+            '{0} is deprecated.'.format(func.__name__),
+            category=DeprecationWarning,
+            stacklevel=2,
+        )
+        return func(*args, **kwargs)
+    return wrapper
+
+
+def newname(template):
+    global _counter
+    _counter = _counter + 1
+    return template.format(_counter)
+_counter = 0
+
+
+def newthread(template="EPCThread-{0}", **kwds):
+    """
+    Instantiate :class:`threading.Thread` with an appropriate name.
+    """
+    if not isinstance(template, str):
+        template = '{0}.{1}-{{0}}'.format(template.__module__,
+                                          template.__class__.__name__)
+    return threading.Thread(
+        name=newname(template), **kwds)
+
+
+class ThreadedIterator(object):
+
+    def __init__(self, iterable):
+        self._original_iterable = iterable
+        self.queue = Queue.Queue()
+        self.thread = newthread(self, target=self._target)
+        self.thread.daemon = True
+        self._sentinel = object()
+        self.thread.start()
+
+    def _target(self):
+        for result in self._original_iterable:
+            self.queue.put(result)
+        self.stop()
+
+    def stop(self):
+        self.queue.put(self._sentinel)
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        got = self.queue.get()
+        if got is self._sentinel:
+            raise StopIteration
+        return got
+    next = __next__  # for PY2
+
+
+def callwith(context_manager):
+    """
+    A decorator to wrap execution of function with a context manager.
+    """
+    def decorator(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kwds):
+            with context_manager:
+                return func(*args, **kwds)
+        return wrapper
+    return decorator
+
+
+def _define_thread_safe_methods(methodnames, lockname):
+    def define(cls, name):
+        def wrapper(self, *args, **kwds):
+            with getattr(self, lockname):
+                return method(self, *args, **kwds)
+        method = getattr(cls, name)
+        setattr(cls, name, wrapper)
+
+    def decorator(cls):
+        for name in methodnames:
+            define(cls, name)
+        return cls
+    return decorator
+
+
+@_define_thread_safe_methods(
+    ['__getitem__', '__setitem__', '__delitem__', 'pop'], '_lock')
+class LockingDict(dict):
+
+    def __init__(self, *args, **kwds):
+        super(LockingDict, self).__init__(*args, **kwds)
+        self._lock = threading.Lock()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/METADATA
new file mode 100644
index 00000000..d6a890e6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/METADATA
@@ -0,0 +1,16 @@
+Metadata-Version: 2.1
+Name: jediepcserver
+Version: 0.2.7
+Summary: UNKNOWN
+Home-page: UNKNOWN
+Author: UNKNOWN
+Author-email: UNKNOWN
+License: UNKNOWN
+Platform: UNKNOWN
+Requires-Dist: jedi (>=0.11.0)
+Requires-Dist: epc (>=0.0.4)
+Requires-Dist: argparse
+
+UNKNOWN
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/RECORD
new file mode 100644
index 00000000..bc2bb5ab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/RECORD
@@ -0,0 +1,9 @@
+../../../bin/jediepcserver,sha256=YorFsOlx_cHSX0YoqKHM5hJhXHepMoBkyXE-ha2WOw4,259

+__pycache__/jediepcserver.cpython-37.pyc,,

+jediepcserver-0.2.7.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4

+jediepcserver-0.2.7.dist-info/METADATA,sha256=nK_zvXLBA3S2gH6JIMdVBx1wz20-oDsLFSVNvjl_taU,261

+jediepcserver-0.2.7.dist-info/RECORD,,

+jediepcserver-0.2.7.dist-info/WHEEL,sha256=0rHDOana14hzsaua2J2L7Ztk6sto42O0noJt7O00ZjE,93

+jediepcserver-0.2.7.dist-info/entry_points.txt,sha256=bxkwkU-SLYTfp2wtiPWulB0uNHLmOBMnvW0ZqkjUuhA,54

+jediepcserver-0.2.7.dist-info/top_level.txt,sha256=Gb2GiBH_6qpbXTn7jWfI6gkuM6dDMeGPWrQM9-rS8x4,14

+jediepcserver.py,sha256=1yNfuxO_WYJgUMexQ9mNZ9Vhe0f3BezejnKXrYAB2Dg,15649

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/WHEEL
new file mode 100644
index 00000000..c1ce8476
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.4)
+Root-Is-Purelib: true
+Tag: cp37-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/entry_points.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/entry_points.txt
new file mode 100644
index 00000000..2942c29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+jediepcserver = jediepcserver:main
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/top_level.txt
new file mode 100644
index 00000000..40017f92
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver-0.2.7.dist-info/top_level.txt
@@ -0,0 +1 @@
+jediepcserver
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver.py
new file mode 100644
index 00000000..8c63e9d8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/jediepcserver.py
@@ -0,0 +1,496 @@
+#!/usr/bin/env python
+
+"""
+Jedi EPC server.
+
+Copyright (C) 2012 Takafumi Arakaki
+
+Author: Takafumi Arakaki <aka.tkf at gmail.com>
+
+This file is NOT part of GNU Emacs.
+
+Jedi EPC server is free software: you can redistribute it and/or
+modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+Jedi EPC server is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Jedi EPC server.
+If not, see <http://www.gnu.org/licenses/>.
+
+"""
+
+import argparse
+import glob
+import itertools
+import logging
+import logging.handlers
+import os
+import re
+import site
+import sys
+from collections import namedtuple
+
+import jedi
+import jedi.api
+
+import epc
+import epc.server
+import sexpdata
+
+logger = logging.getLogger('jediepcserver')
+
+
+parser = argparse.ArgumentParser(
+    formatter_class=argparse.RawTextHelpFormatter,
+    description=__doc__)
+parser.add_argument(
+    '--address', default='localhost')
+parser.add_argument(
+    '--port', default=0, type=int)
+parser.add_argument(
+    '--port-file', '-f', default='-', type=argparse.FileType('wt'),
+    help='file to write port on.  default is stdout.')
+parser.add_argument(
+    '--sys-path', '-p', default=[], action='append',
+    help='paths to be inserted at the top of `sys.path`.')
+parser.add_argument(
+    '--sys-path-append', default=[], action='append',
+    help='paths to be appended at the end of `sys.path`.')
+parser.add_argument(
+    '--virtual-env', '-v', default=[], action='append',
+    help='paths to be used as if VIRTUAL_ENV is set to it.')
+parser.add_argument(
+    '--log', help='Save server log to this file.')
+parser.add_argument(
+    '--log-level',
+    choices=['CRITICAL', 'ERROR', 'WARN', 'INFO', 'DEBUG'],
+    help='Logging level for log file.')
+parser.add_argument(
+    '--log-rotate-max-size', default=0, type=int,
+    help='Rotate log file after it reaches this size',
+)
+parser.add_argument(
+    '--log-rotate-max-count', default=3, type=int,
+    help='Max number of log rotations before removal',
+)
+parser.add_argument(
+    '--log-traceback', action='store_true', default=False,
+    help='Include traceback in logging output.')
+parser.add_argument(
+    '--pdb', dest='debugger', const='pdb', action='store_const',
+    help='start pdb when error occurs.')
+parser.add_argument(
+    '--ipdb', dest='debugger', const='ipdb', action='store_const',
+    help='start ipdb when error occurs.')
+
+
+PY3 = (sys.version_info[0] >= 3)
+NEED_ENCODE = not PY3
+
+
+LogSettings = namedtuple(
+    'LogSettings',
+    [
+        'log_file',
+        'log_level',
+        'log_rotate_max_size',
+        'log_rotate_max_count',
+    ],
+)
+
+
+try:
+    jedi.create_environment
+except AttributeError:
+    jedi_create_environment = None
+else:
+    _cached_jedi_environments = {}
+
+    def jedi_create_environment(venv, safe=False):
+        """Cache jedi environments to avoid startup cost."""
+        try:
+            return _cached_jedi_environments[venv]
+        except KeyError:
+            logger.info('Creating jedi environment: %s', venv)
+            if venv is None:
+                jedienv = jedi.api.environment.get_default_environment()
+            else:
+                jedienv = jedi.create_environment(venv, safe=safe)
+            _cached_jedi_environments[venv] = jedienv
+            return jedienv
+
+
+def get_venv_sys_path(venv):
+    if jedi_create_environment is not None:
+        return jedi_create_environment(venv).get_sys_path()
+    from jedi.evaluate.sys_path import get_venv_path
+    return get_venv_path(venv)
+
+
+class JediEPCHandler(object):
+    def __init__(self, sys_path=(), virtual_envs=(), sys_path_append=()):
+        self.script_kwargs = self._get_script_path_kwargs(
+            sys_path=sys_path,
+            virtual_envs=virtual_envs,
+            sys_path_append=sys_path_append,
+        )
+
+    def get_sys_path(self):
+        environment = self.script_kwargs.get('environment')
+        if environment is not None:
+            return environment.get_sys_path()
+        sys_path = self.script_kwargs.get('sys_path')
+        if sys_path is not None:
+            return sys_path
+        return sys.path
+
+    @classmethod
+    def _get_script_path_kwargs(cls, sys_path, virtual_envs, sys_path_append):
+        result = {}
+        if jedi_create_environment:
+            # Need to specify some environment explicitly to workaround
+            # https://github.com/davidhalter/jedi/issues/1242. Otherwise jedi
+            # will create a lot of child processes.
+            if virtual_envs:
+                primary_env, virtual_envs = virtual_envs[0], virtual_envs[1:]
+                primary_env = path_expand_vars_and_user(primary_env)
+            else:
+                primary_env = None
+            try:
+                result['environment'] = jedi_create_environment(primary_env)
+            except Exception:
+                logger.warning(
+                    'Cannot create environment for %r', primary_env, exc_info=1
+                )
+                if primary_env is not None:
+                    result['environment'] = jedi_create_environment(None)
+
+        if not sys_path and not virtual_envs and not sys_path_append:
+            # No additional path customizations.
+            return result
+
+        # Either multiple environments or custom sys_path extensions are
+        # specified, or jedi version doesn't support environments.
+        final_sys_path = []
+        final_sys_path.extend(path_expand_vars_and_user(p) for p in sys_path)
+        for p in virtual_envs:
+            final_sys_path.extend(get_venv_sys_path(path_expand_vars_and_user(p)))
+        final_sys_path.extend(
+            path_expand_vars_and_user(p) for p in sys_path_append
+        )
+        dupes = set()
+
+        def not_seen_yet(val):
+            if val in dupes:
+                return False
+            dupes.add(val)
+            return True
+        result['sys_path'] = [p for p in final_sys_path if not_seen_yet(p)]
+        return result
+
+    def jedi_script(self, source, line, column, source_path):
+        if NEED_ENCODE:
+            source = source.encode('utf-8')
+            source_path = source_path and source_path.encode('utf-8')
+        return jedi.Script(
+            source, line, column, source_path or '', **self.script_kwargs
+        )
+
+    def complete(self, *args):
+        reply = []
+        for comp in self.jedi_script(*args).completions():
+            try:
+                docstr = comp.docstring()
+            except KeyError:
+                docstr = ""
+
+            reply.append(dict(
+                word=comp.name,
+                doc=docstr,
+                description=candidates_description(comp),
+                symbol=candidate_symbol(comp),
+            ))
+        return reply
+
+    def get_in_function_call(self, *args):
+        sig = self.jedi_script(*args).call_signatures()
+        call_def = sig[0] if sig else None
+
+        if not call_def:
+            return []
+
+        return dict(
+            # p.description should do the job.  But jedi-vim use replace.
+            # So follow what jedi-vim does...
+            params=[PARAM_PREFIX_RE.sub('', p.description).replace('\n', '')
+                    for p in call_def.params],
+            index=call_def.index,
+            call_name=call_def.name,
+        )
+
+    def _goto(self, method, *args):
+        """
+        Helper function for `goto_assignments` and `usages`.
+
+        :arg  method: `jedi.Script.goto_assignments` or `jedi.Script.usages`
+        :arg    args: Arguments to `jedi_script`
+
+        """
+        # `definitions` is a list. Each element is an instances of
+        # `jedi.api_classes.BaseOutput` subclass, i.e.,
+        # `jedi.api_classes.RelatedName` or `jedi.api_classes.Definition`.
+        definitions = method(self.jedi_script(*args))
+        return [dict(
+            column=d.column,
+            line_nr=d.line,
+            module_path=d.module_path if d.module_path != '__builtin__' else [],
+            module_name=d.module_name,
+            description=d.description,
+        ) for d in definitions]
+
+    def goto(self, *args):
+        return self._goto(jedi.Script.goto_assignments, *args)
+
+    def related_names(self, *args):
+        return self._goto(jedi.Script.usages, *args)
+
+    def get_definition(self, *args):
+        definitions = self.jedi_script(*args).goto_definitions()
+        return [definition_to_dict(d) for d in definitions]
+
+    def defined_names(self, *args):
+        # XXX: there's a bug in Jedi that returns returns definitions from inside
+        # classes or functions even though all_scopes=False is set by
+        # default. Hence some additional filtering is in order.
+        #
+        # See https://github.com/davidhalter/jedi/issues/1202
+        top_level_names = [
+            defn
+            for defn in jedi.api.names(*args)
+            if defn.parent().type == 'module'
+        ]
+        return list(map(get_names_recursively, top_level_names))
+
+    def get_jedi_version(self):
+        return [dict(
+            name=module.__name__,
+            file=getattr(module, '__file__', []),
+            version=get_module_version(module) or [],
+        ) for module in [sys, jedi, epc, sexpdata]]
+
+
+def candidate_symbol(comp):
+    """
+    Return a character representing completion type.
+
+    :type comp: jedi.api.Completion
+    :arg  comp: A completion object returned by `jedi.Script.completions`.
+
+    """
+    try:
+        return comp.type[0].lower()
+    except (AttributeError, TypeError):
+        return '?'
+
+
+def candidates_description(comp):
+    """
+    Return `comp.description` in an appropriate format.
+
+    * Avoid return a string 'None'.
+    * Strip off all newlines. This is required for using
+      `comp.description` as candidate summary.
+
+    """
+    desc = comp.description
+    return _WHITESPACES_RE.sub(' ', desc) if desc and desc != 'None' else ''
+_WHITESPACES_RE = re.compile(r'\s+')
+
+
+PARAM_PREFIX_RE = re.compile(r'^param\s+')
+"""RE to strip unwanted "param " prefix returned by param.description."""
+
+
+def definition_to_dict(d):
+    return dict(
+        doc=d.docstring(),
+        description=d.description,
+        desc_with_module=d.desc_with_module,
+        line_nr=d.line,
+        column=d.column,
+        module_path=d.module_path,
+        name=getattr(d, 'name', []),
+        full_name=getattr(d, 'full_name', []),
+        type=getattr(d, 'type', []),
+    )
+
+
+def get_names_recursively(definition, parent=None):
+    """
+    Fetch interesting defined names in sub-scopes under `definition`.
+
+    :type names: jedi.api_classes.Definition
+
+    """
+    d = definition_to_dict(definition)
+    try:
+        d['local_name'] = parent['local_name'] + '.' + d['name']
+    except (AttributeError, TypeError):
+        d['local_name'] = d['name']
+    if definition.type == 'class':
+        ds = definition.defined_names()
+        return [d] + [get_names_recursively(c, d) for c in ds]
+    else:
+        return [d]
+
+
+def get_module_version(module):
+    notfound = object()
+    for key in ['__version__', 'version']:
+        version = getattr(module, key, notfound)
+        if version is not notfound:
+            return version
+    try:
+        from pkg_resources import get_distribution, DistributionNotFound
+        try:
+            return get_distribution(module.__name__).version
+        except DistributionNotFound:
+            pass
+    except ImportError:
+        pass
+
+
+def path_expand_vars_and_user(p):
+    return os.path.expandvars(os.path.expanduser(p))
+
+
+def configure_logging(log_settings):
+    """
+    :type log_settings: LogSettings
+    """
+    if not log_settings.log_file:
+        return
+
+    fmter = logging.Formatter('%(asctime)s:' + logging.BASIC_FORMAT)
+    if log_settings.log_rotate_max_size > 0:
+        handler = logging.handlers.RotatingFileHandler(
+            filename=log_settings.log_file,
+            mode='w',
+            maxBytes=log_settings.log_rotate_max_size,
+            backupCount=log_settings.log_rotate_max_count,
+        )
+    else:
+        handler = logging.FileHandler(filename=log_settings.log_file, mode='w')
+    handler.setFormatter(fmter)
+    if log_settings.log_level:
+        logging.root.setLevel(log_settings.log_level.upper())
+    logging.root.addHandler(handler)
+
+
+def jedi_epc_server(
+        address='localhost',
+        port=0,
+        port_file=sys.stdout,
+        sys_path=[],
+        virtual_env=[],
+        sys_path_append=[],
+        debugger=None,
+        log_traceback=None,
+):
+    """Start EPC server.
+
+    :type log_settings: LogSettings
+
+    """
+    logger.debug(
+        'jedi_epc_server: sys_path=%r virtual_env=%r sys_path_append=%r',
+        sys_path, virtual_env, sys_path_append,
+    )
+
+    if not virtual_env and os.getenv('VIRTUAL_ENV'):
+        logger.debug(
+            'Taking virtual env from VIRTUAL_ENV: %r',
+            os.environ['VIRTUAL_ENV'],
+        )
+        virtual_env = [os.environ['VIRTUAL_ENV']]
+
+    handler = JediEPCHandler(
+        sys_path=sys_path,
+        virtual_envs=virtual_env,
+        sys_path_append=sys_path_append,
+    )
+    logger.debug(
+        'Starting Jedi EPC server with the following sys.path: %r',
+        handler.get_sys_path(),
+    )
+    server = epc.server.EPCServer((address, port))
+    server.register_function(handler.complete)
+    server.register_function(handler.get_in_function_call)
+    server.register_function(handler.goto)
+    server.register_function(handler.related_names)
+    server.register_function(handler.get_definition)
+    server.register_function(handler.defined_names)
+    server.register_function(handler.get_jedi_version)
+
+    @server.register_function
+    def toggle_log_traceback():
+        server.log_traceback = not server.log_traceback
+        return server.log_traceback
+
+    port_file.write(str(server.server_address[1]))  # needed for Emacs client
+    port_file.write("\n")
+    port_file.flush()
+    if port_file is not sys.stdout:
+        port_file.close()
+
+    # This is not supported Python-EPC API, but I am using this for
+    # backward compatibility for Python-EPC < 0.0.4.  In the future,
+    # it should be passed to the constructor.
+    server.log_traceback = bool(log_traceback)
+
+    if debugger:
+        server.set_debugger(debugger)
+        handler = logging.StreamHandler()
+        fmter = logging.Formatter('%(asctime)s:' + logging.BASIC_FORMAT)
+        handler.setFormatter(fmter)
+        handler.setLevel(logging.DEBUG)
+        server.logger.addHandler(handler)
+        server.logger.setLevel(logging.DEBUG)
+    return server
+
+
+# def add_virtualenv_path(venv):
+#     """Add virtualenv's site-packages to `sys.path`."""
+#     venv = os.path.abspath(venv)
+#     paths = glob.glob(os.path.join(
+#         venv, 'lib', 'python*', 'site-packages'))
+#     if not paths:
+#         raise ValueError('Invalid venv: no site-packages found: %s' % venv)
+#     for path in paths:
+#         site.addsitedir(path)
+
+
+def main(args=None):
+    ns = parser.parse_args(args)
+
+    ns_vars = vars(ns).copy()
+    log_settings = LogSettings(
+        log_file=ns_vars.pop('log'),
+        log_level=ns_vars.pop('log_level'),
+        log_rotate_max_size=ns_vars.pop('log_rotate_max_size'),
+        log_rotate_max_count=ns_vars.pop('log_rotate_max_count'),
+    )
+    configure_logging(log_settings)
+    server = jedi_epc_server(**ns_vars)
+    server.serve_forever()
+    server.logger.info('exit')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/LICENSE.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/LICENSE.txt
new file mode 100644
index 00000000..737fec5c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2008-2019 The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/METADATA
new file mode 100644
index 00000000..f81fd413
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/METADATA
@@ -0,0 +1,81 @@
+Metadata-Version: 2.1
+Name: pip
+Version: 19.2.1
+Summary: The PyPA recommended tool for installing Python packages.
+Home-page: https://pip.pypa.io/
+Author: The pip developers
+Author-email: pypa-dev@groups.google.com
+License: MIT
+Keywords: distutils easy_install egg setuptools wheel virtualenv
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Topic :: Software Development :: Build Tools
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*
+
+pip - The Python Package Installer
+==================================
+
+.. image:: https://img.shields.io/pypi/v/pip.svg
+   :target: https://pypi.org/project/pip/
+
+.. image:: https://readthedocs.org/projects/pip/badge/?version=latest
+   :target: https://pip.pypa.io/en/latest
+
+pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
+
+Please take a look at our documentation for how to install and use pip:
+
+* `Installation`_
+* `Usage`_
+
+Updates are released regularly, with a new version every 3 months. More details can be found in our documentation:
+
+* `Release notes`_
+* `Release process`_
+
+If you find bugs, need help, or want to talk to the developers please use our mailing lists or chat rooms:
+
+* `Issue tracking`_
+* `Discourse channel`_
+* `User IRC`_
+
+If you want to get involved head over to GitHub to get the source code, look at our development documentation and feel free to jump on the developer mailing lists and chat rooms:
+
+* `GitHub page`_
+* `Dev documentation`_
+* `Dev mailing list`_
+* `Dev IRC`_
+
+Code of Conduct
+---------------
+
+Everyone interacting in the pip project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PyPA Code of Conduct`_.
+
+.. _package installer: https://packaging.python.org/en/latest/current/
+.. _Python Package Index: https://pypi.org
+.. _Installation: https://pip.pypa.io/en/stable/installing.html
+.. _Usage: https://pip.pypa.io/en/stable/
+.. _Release notes: https://pip.pypa.io/en/stable/news.html
+.. _Release process: https://pip.pypa.io/en/latest/development/release-process/
+.. _GitHub page: https://github.com/pypa/pip
+.. _Dev documentation: https://pip.pypa.io/en/latest/development
+.. _Issue tracking: https://github.com/pypa/pip/issues
+.. _Discourse channel: https://discuss.python.org/c/packaging
+.. _Dev mailing list: https://groups.google.com/forum/#!forum/pypa-dev
+.. _User IRC: https://webchat.freenode.net/?channels=%23pypa
+.. _Dev IRC: https://webchat.freenode.net/?channels=%23pypa-dev
+.. _PyPA Code of Conduct: https://www.pypa.io/en/latest/code-of-conduct/
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/RECORD
new file mode 100644
index 00000000..439eb4dd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/RECORD
@@ -0,0 +1,668 @@
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+pip-19.2.1.dist-info/RECORD,,

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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/WHEEL
new file mode 100644
index 00000000..78e6f69d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.4)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/entry_points.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/entry_points.txt
new file mode 100644
index 00000000..f5809cb4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/entry_points.txt
@@ -0,0 +1,5 @@
+[console_scripts]
+pip = pip._internal:main
+pip3 = pip._internal:main
+pip3.7 = pip._internal:main
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/top_level.txt
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip-19.2.1.dist-info/top_level.txt
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__init__.py
new file mode 100644
index 00000000..a0196ad5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__init__.py
@@ -0,0 +1 @@
+__version__ = "19.2.1"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__main__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__main__.py
new file mode 100644
index 00000000..0c223f8c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__main__.py
@@ -0,0 +1,19 @@
+from __future__ import absolute_import
+
+import os
+import sys
+
+# If we are running from a wheel, add the wheel to sys.path
+# This allows the usage python pip-*.whl/pip install pip-*.whl
+if __package__ == '':
+    # __file__ is pip-*.whl/pip/__main__.py
+    # first dirname call strips of '/__main__.py', second strips off '/pip'
+    # Resulting path is the name of the wheel itself
+    # Add that to sys.path so we can import pip
+    path = os.path.dirname(os.path.dirname(__file__))
+    sys.path.insert(0, path)
+
+from pip._internal import main as _main  # isort:skip # noqa
+
+if __name__ == '__main__':
+    sys.exit(_main())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..76c2d114
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__main__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__main__.cpython-37.pyc
new file mode 100644
index 00000000..d580bfe4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/__pycache__/__main__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__init__.py
new file mode 100644
index 00000000..fbadc28a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__init__.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+from __future__ import absolute_import
+
+import locale
+import logging
+import os
+import warnings
+
+import sys
+
+# 2016-06-17 barry@debian.org: urllib3 1.14 added optional support for socks,
+# but if invoked (i.e. imported), it will issue a warning to stderr if socks
+# isn't available.  requests unconditionally imports urllib3's socks contrib
+# module, triggering this warning.  The warning breaks DEP-8 tests (because of
+# the stderr output) and is just plain annoying in normal usage.  I don't want
+# to add socks as yet another dependency for pip, nor do I want to allow-stderr
+# in the DEP-8 tests, so just suppress the warning.  pdb tells me this has to
+# be done before the import of pip.vcs.
+from pip._vendor.urllib3.exceptions import DependencyWarning
+warnings.filterwarnings("ignore", category=DependencyWarning)  # noqa
+
+# We want to inject the use of SecureTransport as early as possible so that any
+# references or sessions or what have you are ensured to have it, however we
+# only want to do this in the case that we're running on macOS and the linked
+# OpenSSL is too old to handle TLSv1.2
+try:
+    import ssl
+except ImportError:
+    pass
+else:
+    # Checks for OpenSSL 1.0.1 on MacOS
+    if sys.platform == "darwin" and ssl.OPENSSL_VERSION_NUMBER < 0x1000100f:
+        try:
+            from pip._vendor.urllib3.contrib import securetransport
+        except (ImportError, OSError):
+            pass
+        else:
+            securetransport.inject_into_urllib3()
+
+from pip._internal.cli.autocompletion import autocomplete
+from pip._internal.cli.main_parser import parse_command
+from pip._internal.commands import commands_dict
+from pip._internal.exceptions import PipError
+from pip._internal.utils import deprecation
+from pip._vendor.urllib3.exceptions import InsecureRequestWarning
+
+logger = logging.getLogger(__name__)
+
+# Hide the InsecureRequestWarning from urllib3
+warnings.filterwarnings("ignore", category=InsecureRequestWarning)
+
+
+def main(args=None):
+    if args is None:
+        args = sys.argv[1:]
+
+    # Configure our deprecation warnings to be sent through loggers
+    deprecation.install_warning_logger()
+
+    autocomplete()
+
+    try:
+        cmd_name, cmd_args = parse_command(args)
+    except PipError as exc:
+        sys.stderr.write("ERROR: %s" % exc)
+        sys.stderr.write(os.linesep)
+        sys.exit(1)
+
+    # Needed for locale.getpreferredencoding(False) to work
+    # in pip._internal.utils.encoding.auto_decode
+    try:
+        locale.setlocale(locale.LC_ALL, '')
+    except locale.Error as e:
+        # setlocale can apparently crash if locale are uninitialized
+        logger.debug("Ignoring error %s when setting locale", e)
+    command = commands_dict[cmd_name](isolated=("--isolated" in cmd_args))
+    return command.main(cmd_args)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..fdb85bc3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/build_env.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/build_env.cpython-37.pyc
new file mode 100644
index 00000000..7f3cdbb1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/build_env.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/cache.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/cache.cpython-37.pyc
new file mode 100644
index 00000000..846c660d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/cache.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/configuration.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/configuration.cpython-37.pyc
new file mode 100644
index 00000000..20c8743e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/configuration.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/download.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/download.cpython-37.pyc
new file mode 100644
index 00000000..22fbb600
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/download.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/exceptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/exceptions.cpython-37.pyc
new file mode 100644
index 00000000..6d7ddb78
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/exceptions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/index.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/index.cpython-37.pyc
new file mode 100644
index 00000000..0ee5a4fc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/index.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/legacy_resolve.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/legacy_resolve.cpython-37.pyc
new file mode 100644
index 00000000..a671abd4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/legacy_resolve.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/locations.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/locations.cpython-37.pyc
new file mode 100644
index 00000000..1b6dcdbe
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/locations.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pep425tags.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pep425tags.cpython-37.pyc
new file mode 100644
index 00000000..307c519a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pep425tags.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pyproject.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pyproject.cpython-37.pyc
new file mode 100644
index 00000000..baf9a7bb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/pyproject.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/wheel.cpython-37.pyc
new file mode 100644
index 00000000..5cfb8ef6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/__pycache__/wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/build_env.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/build_env.py
new file mode 100644
index 00000000..a060ceea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/build_env.py
@@ -0,0 +1,218 @@
+"""Build Environment used for isolation during sdist building
+"""
+
+import logging
+import os
+import sys
+import textwrap
+from collections import OrderedDict
+from distutils.sysconfig import get_python_lib
+from sysconfig import get_paths
+
+from pip._vendor.pkg_resources import Requirement, VersionConflict, WorkingSet
+
+from pip import __file__ as pip_location
+from pip._internal.utils.misc import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.ui import open_spinner
+
+if MYPY_CHECK_RUNNING:
+    from typing import Tuple, Set, Iterable, Optional, List
+    from pip._internal.index import PackageFinder
+
+logger = logging.getLogger(__name__)
+
+
+class _Prefix:
+
+    def __init__(self, path):
+        # type: (str) -> None
+        self.path = path
+        self.setup = False
+        self.bin_dir = get_paths(
+            'nt' if os.name == 'nt' else 'posix_prefix',
+            vars={'base': path, 'platbase': path}
+        )['scripts']
+        # Note: prefer distutils' sysconfig to get the
+        # library paths so PyPy is correctly supported.
+        purelib = get_python_lib(plat_specific=False, prefix=path)
+        platlib = get_python_lib(plat_specific=True, prefix=path)
+        if purelib == platlib:
+            self.lib_dirs = [purelib]
+        else:
+            self.lib_dirs = [purelib, platlib]
+
+
+class BuildEnvironment(object):
+    """Creates and manages an isolated environment to install build deps
+    """
+
+    def __init__(self):
+        # type: () -> None
+        self._temp_dir = TempDirectory(kind="build-env")
+        self._temp_dir.create()
+
+        self._prefixes = OrderedDict((
+            (name, _Prefix(os.path.join(self._temp_dir.path, name)))
+            for name in ('normal', 'overlay')
+        ))
+
+        self._bin_dirs = []  # type: List[str]
+        self._lib_dirs = []  # type: List[str]
+        for prefix in reversed(list(self._prefixes.values())):
+            self._bin_dirs.append(prefix.bin_dir)
+            self._lib_dirs.extend(prefix.lib_dirs)
+
+        # Customize site to:
+        # - ensure .pth files are honored
+        # - prevent access to system site packages
+        system_sites = {
+            os.path.normcase(site) for site in (
+                get_python_lib(plat_specific=False),
+                get_python_lib(plat_specific=True),
+            )
+        }
+        self._site_dir = os.path.join(self._temp_dir.path, 'site')
+        if not os.path.exists(self._site_dir):
+            os.mkdir(self._site_dir)
+        with open(os.path.join(self._site_dir, 'sitecustomize.py'), 'w') as fp:
+            fp.write(textwrap.dedent(
+                '''
+                import os, site, sys
+
+                # First, drop system-sites related paths.
+                original_sys_path = sys.path[:]
+                known_paths = set()
+                for path in {system_sites!r}:
+                    site.addsitedir(path, known_paths=known_paths)
+                system_paths = set(
+                    os.path.normcase(path)
+                    for path in sys.path[len(original_sys_path):]
+                )
+                original_sys_path = [
+                    path for path in original_sys_path
+                    if os.path.normcase(path) not in system_paths
+                ]
+                sys.path = original_sys_path
+
+                # Second, add lib directories.
+                # ensuring .pth file are processed.
+                for path in {lib_dirs!r}:
+                    assert not path in sys.path
+                    site.addsitedir(path)
+                '''
+            ).format(system_sites=system_sites, lib_dirs=self._lib_dirs))
+
+    def __enter__(self):
+        self._save_env = {
+            name: os.environ.get(name, None)
+            for name in ('PATH', 'PYTHONNOUSERSITE', 'PYTHONPATH')
+        }
+
+        path = self._bin_dirs[:]
+        old_path = self._save_env['PATH']
+        if old_path:
+            path.extend(old_path.split(os.pathsep))
+
+        pythonpath = [self._site_dir]
+
+        os.environ.update({
+            'PATH': os.pathsep.join(path),
+            'PYTHONNOUSERSITE': '1',
+            'PYTHONPATH': os.pathsep.join(pythonpath),
+        })
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        for varname, old_value in self._save_env.items():
+            if old_value is None:
+                os.environ.pop(varname, None)
+            else:
+                os.environ[varname] = old_value
+
+    def cleanup(self):
+        # type: () -> None
+        self._temp_dir.cleanup()
+
+    def check_requirements(self, reqs):
+        # type: (Iterable[str]) -> Tuple[Set[Tuple[str, str]], Set[str]]
+        """Return 2 sets:
+            - conflicting requirements: set of (installed, wanted) reqs tuples
+            - missing requirements: set of reqs
+        """
+        missing = set()
+        conflicting = set()
+        if reqs:
+            ws = WorkingSet(self._lib_dirs)
+            for req in reqs:
+                try:
+                    if ws.find(Requirement.parse(req)) is None:
+                        missing.add(req)
+                except VersionConflict as e:
+                    conflicting.add((str(e.args[0].as_requirement()),
+                                     str(e.args[1])))
+        return conflicting, missing
+
+    def install_requirements(
+        self,
+        finder,  # type: PackageFinder
+        requirements,  # type: Iterable[str]
+        prefix_as_string,  # type: str
+        message  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        prefix = self._prefixes[prefix_as_string]
+        assert not prefix.setup
+        prefix.setup = True
+        if not requirements:
+            return
+        args = [
+            sys.executable, os.path.dirname(pip_location), 'install',
+            '--ignore-installed', '--no-user', '--prefix', prefix.path,
+            '--no-warn-script-location',
+        ]  # type: List[str]
+        if logger.getEffectiveLevel() <= logging.DEBUG:
+            args.append('-v')
+        for format_control in ('no_binary', 'only_binary'):
+            formats = getattr(finder.format_control, format_control)
+            args.extend(('--' + format_control.replace('_', '-'),
+                         ','.join(sorted(formats or {':none:'}))))
+
+        index_urls = finder.index_urls
+        if index_urls:
+            args.extend(['-i', index_urls[0]])
+            for extra_index in index_urls[1:]:
+                args.extend(['--extra-index-url', extra_index])
+        else:
+            args.append('--no-index')
+        for link in finder.find_links:
+            args.extend(['--find-links', link])
+
+        for host in finder.trusted_hosts:
+            args.extend(['--trusted-host', host])
+        if finder.allow_all_prereleases:
+            args.append('--pre')
+        args.append('--')
+        args.extend(requirements)
+        with open_spinner(message) as spinner:
+            call_subprocess(args, spinner=spinner)
+
+
+class NoOpBuildEnvironment(BuildEnvironment):
+    """A no-op drop-in replacement for BuildEnvironment
+    """
+
+    def __init__(self):
+        pass
+
+    def __enter__(self):
+        pass
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        pass
+
+    def cleanup(self):
+        pass
+
+    def install_requirements(self, finder, requirements, prefix, message):
+        raise NotImplementedError()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cache.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cache.py
new file mode 100644
index 00000000..894624c1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cache.py
@@ -0,0 +1,224 @@
+"""Cache Management
+"""
+
+import errno
+import hashlib
+import logging
+import os
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.models.link import Link
+from pip._internal.utils.compat import expanduser
+from pip._internal.utils.misc import path_to_url
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.wheel import InvalidWheelFilename, Wheel
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Set, List, Any
+    from pip._internal.index import FormatControl
+
+logger = logging.getLogger(__name__)
+
+
+class Cache(object):
+    """An abstract class - provides cache directories for data from links
+
+
+        :param cache_dir: The root of the cache.
+        :param format_control: An object of FormatControl class to limit
+            binaries being read from the cache.
+        :param allowed_formats: which formats of files the cache should store.
+            ('binary' and 'source' are the only allowed values)
+    """
+
+    def __init__(self, cache_dir, format_control, allowed_formats):
+        # type: (str, FormatControl, Set[str]) -> None
+        super(Cache, self).__init__()
+        self.cache_dir = expanduser(cache_dir) if cache_dir else None
+        self.format_control = format_control
+        self.allowed_formats = allowed_formats
+
+        _valid_formats = {"source", "binary"}
+        assert self.allowed_formats.union(_valid_formats) == _valid_formats
+
+    def _get_cache_path_parts(self, link):
+        # type: (Link) -> List[str]
+        """Get parts of part that must be os.path.joined with cache_dir
+        """
+
+        # We want to generate an url to use as our cache key, we don't want to
+        # just re-use the URL because it might have other items in the fragment
+        # and we don't care about those.
+        key_parts = [link.url_without_fragment]
+        if link.hash_name is not None and link.hash is not None:
+            key_parts.append("=".join([link.hash_name, link.hash]))
+        key_url = "#".join(key_parts)
+
+        # Encode our key url with sha224, we'll use this because it has similar
+        # security properties to sha256, but with a shorter total output (and
+        # thus less secure). However the differences don't make a lot of
+        # difference for our use case here.
+        hashed = hashlib.sha224(key_url.encode()).hexdigest()
+
+        # We want to nest the directories some to prevent having a ton of top
+        # level directories where we might run out of sub directories on some
+        # FS.
+        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
+
+        return parts
+
+    def _get_candidates(self, link, package_name):
+        # type: (Link, Optional[str]) -> List[Any]
+        can_not_cache = (
+            not self.cache_dir or
+            not package_name or
+            not link
+        )
+        if can_not_cache:
+            return []
+
+        canonical_name = canonicalize_name(package_name)
+        formats = self.format_control.get_allowed_formats(
+            canonical_name
+        )
+        if not self.allowed_formats.intersection(formats):
+            return []
+
+        root = self.get_path_for_link(link)
+        try:
+            return os.listdir(root)
+        except OSError as err:
+            if err.errno in {errno.ENOENT, errno.ENOTDIR}:
+                return []
+            raise
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        """Return a directory to store cached items in for link.
+        """
+        raise NotImplementedError()
+
+    def get(self, link, package_name):
+        # type: (Link, Optional[str]) -> Link
+        """Returns a link to a cached item if it exists, otherwise returns the
+        passed link.
+        """
+        raise NotImplementedError()
+
+    def _link_for_candidate(self, link, candidate):
+        # type: (Link, str) -> Link
+        root = self.get_path_for_link(link)
+        path = os.path.join(root, candidate)
+
+        return Link(path_to_url(path))
+
+    def cleanup(self):
+        # type: () -> None
+        pass
+
+
+class SimpleWheelCache(Cache):
+    """A cache of wheels for future installs.
+    """
+
+    def __init__(self, cache_dir, format_control):
+        # type: (str, FormatControl) -> None
+        super(SimpleWheelCache, self).__init__(
+            cache_dir, format_control, {"binary"}
+        )
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        """Return a directory to store cached wheels for link
+
+        Because there are M wheels for any one sdist, we provide a directory
+        to cache them in, and then consult that directory when looking up
+        cache hits.
+
+        We only insert things into the cache if they have plausible version
+        numbers, so that we don't contaminate the cache with things that were
+        not unique. E.g. ./package might have dozens of installs done for it
+        and build a version of 0.0...and if we built and cached a wheel, we'd
+        end up using the same wheel even if the source has been edited.
+
+        :param link: The link of the sdist for which this will cache wheels.
+        """
+        parts = self._get_cache_path_parts(link)
+
+        # Store wheels within the root cache_dir
+        return os.path.join(self.cache_dir, "wheels", *parts)
+
+    def get(self, link, package_name):
+        # type: (Link, Optional[str]) -> Link
+        candidates = []
+
+        for wheel_name in self._get_candidates(link, package_name):
+            try:
+                wheel = Wheel(wheel_name)
+            except InvalidWheelFilename:
+                continue
+            if not wheel.supported():
+                # Built for a different python/arch/etc
+                continue
+            candidates.append((wheel.support_index_min(), wheel_name))
+
+        if not candidates:
+            return link
+
+        return self._link_for_candidate(link, min(candidates)[1])
+
+
+class EphemWheelCache(SimpleWheelCache):
+    """A SimpleWheelCache that creates it's own temporary cache directory
+    """
+
+    def __init__(self, format_control):
+        # type: (FormatControl) -> None
+        self._temp_dir = TempDirectory(kind="ephem-wheel-cache")
+        self._temp_dir.create()
+
+        super(EphemWheelCache, self).__init__(
+            self._temp_dir.path, format_control
+        )
+
+    def cleanup(self):
+        # type: () -> None
+        self._temp_dir.cleanup()
+
+
+class WheelCache(Cache):
+    """Wraps EphemWheelCache and SimpleWheelCache into a single Cache
+
+    This Cache allows for gracefully degradation, using the ephem wheel cache
+    when a certain link is not found in the simple wheel cache first.
+    """
+
+    def __init__(self, cache_dir, format_control):
+        # type: (str, FormatControl) -> None
+        super(WheelCache, self).__init__(
+            cache_dir, format_control, {'binary'}
+        )
+        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
+        self._ephem_cache = EphemWheelCache(format_control)
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        return self._wheel_cache.get_path_for_link(link)
+
+    def get_ephem_path_for_link(self, link):
+        # type: (Link) -> str
+        return self._ephem_cache.get_path_for_link(link)
+
+    def get(self, link, package_name):
+        # type: (Link, Optional[str]) -> Link
+        retval = self._wheel_cache.get(link, package_name)
+        if retval is link:
+            retval = self._ephem_cache.get(link, package_name)
+        return retval
+
+    def cleanup(self):
+        # type: () -> None
+        self._wheel_cache.cleanup()
+        self._ephem_cache.cleanup()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__init__.py
new file mode 100644
index 00000000..e589bb91
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__init__.py
@@ -0,0 +1,4 @@
+"""Subpackage containing all of pip's command line interface related code
+"""
+
+# This file intentionally does not import submodules
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..09f43687
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/autocompletion.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/autocompletion.cpython-37.pyc
new file mode 100644
index 00000000..4c1743dd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/autocompletion.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/base_command.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/base_command.cpython-37.pyc
new file mode 100644
index 00000000..a3a0d223
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/base_command.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/cmdoptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/cmdoptions.cpython-37.pyc
new file mode 100644
index 00000000..0e3c51cb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/cmdoptions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/main_parser.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/main_parser.cpython-37.pyc
new file mode 100644
index 00000000..0b719c29
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/main_parser.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/parser.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/parser.cpython-37.pyc
new file mode 100644
index 00000000..3fa51194
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/parser.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/status_codes.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/status_codes.cpython-37.pyc
new file mode 100644
index 00000000..8cede51c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/__pycache__/status_codes.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py
new file mode 100644
index 00000000..0a04199e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py
@@ -0,0 +1,152 @@
+"""Logic that powers autocompletion installed by ``pip completion``.
+"""
+
+import optparse
+import os
+import sys
+
+from pip._internal.cli.main_parser import create_main_parser
+from pip._internal.commands import commands_dict, get_summaries
+from pip._internal.utils.misc import get_installed_distributions
+
+
+def autocomplete():
+    """Entry Point for completion of main and subcommand options.
+    """
+    # Don't complete if user hasn't sourced bash_completion file.
+    if 'PIP_AUTO_COMPLETE' not in os.environ:
+        return
+    cwords = os.environ['COMP_WORDS'].split()[1:]
+    cword = int(os.environ['COMP_CWORD'])
+    try:
+        current = cwords[cword - 1]
+    except IndexError:
+        current = ''
+
+    subcommands = [cmd for cmd, summary in get_summaries()]
+    options = []
+    # subcommand
+    try:
+        subcommand_name = [w for w in cwords if w in subcommands][0]
+    except IndexError:
+        subcommand_name = None
+
+    parser = create_main_parser()
+    # subcommand options
+    if subcommand_name:
+        # special case: 'help' subcommand has no options
+        if subcommand_name == 'help':
+            sys.exit(1)
+        # special case: list locally installed dists for show and uninstall
+        should_list_installed = (
+            subcommand_name in ['show', 'uninstall'] and
+            not current.startswith('-')
+        )
+        if should_list_installed:
+            installed = []
+            lc = current.lower()
+            for dist in get_installed_distributions(local_only=True):
+                if dist.key.startswith(lc) and dist.key not in cwords[1:]:
+                    installed.append(dist.key)
+            # if there are no dists installed, fall back to option completion
+            if installed:
+                for dist in installed:
+                    print(dist)
+                sys.exit(1)
+
+        subcommand = commands_dict[subcommand_name]()
+
+        for opt in subcommand.parser.option_list_all:
+            if opt.help != optparse.SUPPRESS_HELP:
+                for opt_str in opt._long_opts + opt._short_opts:
+                    options.append((opt_str, opt.nargs))
+
+        # filter out previously specified options from available options
+        prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]]
+        options = [(x, v) for (x, v) in options if x not in prev_opts]
+        # filter options by current input
+        options = [(k, v) for k, v in options if k.startswith(current)]
+        # get completion type given cwords and available subcommand options
+        completion_type = get_path_completion_type(
+            cwords, cword, subcommand.parser.option_list_all,
+        )
+        # get completion files and directories if ``completion_type`` is
+        # ``<file>``, ``<dir>`` or ``<path>``
+        if completion_type:
+            options = auto_complete_paths(current, completion_type)
+            options = ((opt, 0) for opt in options)
+        for option in options:
+            opt_label = option[0]
+            # append '=' to options which require args
+            if option[1] and option[0][:2] == "--":
+                opt_label += '='
+            print(opt_label)
+    else:
+        # show main parser options only when necessary
+
+        opts = [i.option_list for i in parser.option_groups]
+        opts.append(parser.option_list)
+        opts = (o for it in opts for o in it)
+        if current.startswith('-'):
+            for opt in opts:
+                if opt.help != optparse.SUPPRESS_HELP:
+                    subcommands += opt._long_opts + opt._short_opts
+        else:
+            # get completion type given cwords and all available options
+            completion_type = get_path_completion_type(cwords, cword, opts)
+            if completion_type:
+                subcommands = auto_complete_paths(current, completion_type)
+
+        print(' '.join([x for x in subcommands if x.startswith(current)]))
+    sys.exit(1)
+
+
+def get_path_completion_type(cwords, cword, opts):
+    """Get the type of path completion (``file``, ``dir``, ``path`` or None)
+
+    :param cwords: same as the environmental variable ``COMP_WORDS``
+    :param cword: same as the environmental variable ``COMP_CWORD``
+    :param opts: The available options to check
+    :return: path completion type (``file``, ``dir``, ``path`` or None)
+    """
+    if cword < 2 or not cwords[cword - 2].startswith('-'):
+        return
+    for opt in opts:
+        if opt.help == optparse.SUPPRESS_HELP:
+            continue
+        for o in str(opt).split('/'):
+            if cwords[cword - 2].split('=')[0] == o:
+                if not opt.metavar or any(
+                        x in ('path', 'file', 'dir')
+                        for x in opt.metavar.split('/')):
+                    return opt.metavar
+
+
+def auto_complete_paths(current, completion_type):
+    """If ``completion_type`` is ``file`` or ``path``, list all regular files
+    and directories starting with ``current``; otherwise only list directories
+    starting with ``current``.
+
+    :param current: The word to be completed
+    :param completion_type: path completion type(`file`, `path` or `dir`)i
+    :return: A generator of regular files and/or directories
+    """
+    directory, filename = os.path.split(current)
+    current_path = os.path.abspath(directory)
+    # Don't complete paths if they can't be accessed
+    if not os.access(current_path, os.R_OK):
+        return
+    filename = os.path.normcase(filename)
+    # list all files that start with ``filename``
+    file_list = (x for x in os.listdir(current_path)
+                 if os.path.normcase(x).startswith(filename))
+    for f in file_list:
+        opt = os.path.join(current_path, f)
+        comp_file = os.path.normcase(os.path.join(directory, f))
+        # complete regular files when there is not ``<dir>`` after option
+        # complete directories when there is ``<file>``, ``<path>`` or
+        # ``<dir>``after option
+        if completion_type != 'dir' and os.path.isfile(opt):
+            yield comp_file
+        elif os.path.isdir(opt):
+            yield os.path.join(comp_file, '')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/base_command.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/base_command.py
new file mode 100644
index 00000000..90830be4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/base_command.py
@@ -0,0 +1,346 @@
+"""Base Command class, and related routines"""
+from __future__ import absolute_import, print_function
+
+import logging
+import logging.config
+import optparse
+import os
+import platform
+import sys
+import traceback
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_search_scope
+from pip._internal.cli.parser import (
+    ConfigOptionParser, UpdatingDefaultsHelpFormatter,
+)
+from pip._internal.cli.status_codes import (
+    ERROR, PREVIOUS_BUILD_DIR_ERROR, SUCCESS, UNKNOWN_ERROR,
+    VIRTUALENV_NOT_FOUND,
+)
+from pip._internal.download import PipSession
+from pip._internal.exceptions import (
+    BadCommand, CommandError, InstallationError, PreviousBuildDirError,
+    UninstallationError,
+)
+from pip._internal.index import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.req.constructors import (
+    install_req_from_editable, install_req_from_line,
+)
+from pip._internal.req.req_file import parse_requirements
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
+from pip._internal.utils.misc import get_prog, normalize_path
+from pip._internal.utils.outdated import pip_version_check
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, List, Tuple, Any
+    from optparse import Values
+    from pip._internal.cache import WheelCache
+    from pip._internal.req.req_set import RequirementSet
+
+__all__ = ['Command']
+
+logger = logging.getLogger(__name__)
+
+
+class Command(object):
+    name = None  # type: Optional[str]
+    usage = None  # type: Optional[str]
+    ignore_require_venv = False  # type: bool
+
+    def __init__(self, isolated=False):
+        # type: (bool) -> None
+        parser_kw = {
+            'usage': self.usage,
+            'prog': '%s %s' % (get_prog(), self.name),
+            'formatter': UpdatingDefaultsHelpFormatter(),
+            'add_help_option': False,
+            'name': self.name,
+            'description': self.__doc__,
+            'isolated': isolated,
+        }
+
+        self.parser = ConfigOptionParser(**parser_kw)
+
+        # Commands should add options to this option group
+        optgroup_name = '%s Options' % self.name.capitalize()
+        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
+
+        # Add the general options
+        gen_opts = cmdoptions.make_option_group(
+            cmdoptions.general_group,
+            self.parser,
+        )
+        self.parser.add_option_group(gen_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> Any
+        raise NotImplementedError
+
+    @classmethod
+    def _get_index_urls(cls, options):
+        """Return a list of index urls from user-provided options."""
+        index_urls = []
+        if not getattr(options, "no_index", False):
+            url = getattr(options, "index_url", None)
+            if url:
+                index_urls.append(url)
+        urls = getattr(options, "extra_index_urls", None)
+        if urls:
+            index_urls.extend(urls)
+        # Return None rather than an empty list
+        return index_urls or None
+
+    def _build_session(self, options, retries=None, timeout=None):
+        # type: (Values, Optional[int], Optional[int]) -> PipSession
+        session = PipSession(
+            cache=(
+                normalize_path(os.path.join(options.cache_dir, "http"))
+                if options.cache_dir else None
+            ),
+            retries=retries if retries is not None else options.retries,
+            insecure_hosts=options.trusted_hosts,
+            index_urls=self._get_index_urls(options),
+        )
+
+        # Handle custom ca-bundles from the user
+        if options.cert:
+            session.verify = options.cert
+
+        # Handle SSL client certificate
+        if options.client_cert:
+            session.cert = options.client_cert
+
+        # Handle timeouts
+        if options.timeout or timeout:
+            session.timeout = (
+                timeout if timeout is not None else options.timeout
+            )
+
+        # Handle configured proxies
+        if options.proxy:
+            session.proxies = {
+                "http": options.proxy,
+                "https": options.proxy,
+            }
+
+        # Determine if we can prompt the user for authentication or not
+        session.auth.prompting = not options.no_input
+
+        return session
+
+    def parse_args(self, args):
+        # type: (List[str]) -> Tuple
+        # factored out for testability
+        return self.parser.parse_args(args)
+
+    def main(self, args):
+        # type: (List[str]) -> int
+        options, args = self.parse_args(args)
+
+        # Set verbosity so that it can be used elsewhere.
+        self.verbosity = options.verbose - options.quiet
+
+        level_number = setup_logging(
+            verbosity=self.verbosity,
+            no_color=options.no_color,
+            user_log_file=options.log,
+        )
+
+        if sys.version_info[:2] == (2, 7):
+            message = (
+                "A future version of pip will drop support for Python 2.7. "
+                "More details about Python 2 support in pip, can be found at "
+                "https://pip.pypa.io/en/latest/development/release-process/#python-2-support"  # noqa
+            )
+            if platform.python_implementation() == "CPython":
+                message = (
+                    "Python 2.7 will reach the end of its life on January "
+                    "1st, 2020. Please upgrade your Python as Python 2.7 "
+                    "won't be maintained after that date. "
+                ) + message
+            deprecated(message, replacement=None, gone_in=None)
+
+        # TODO: Try to get these passing down from the command?
+        #       without resorting to os.environ to hold these.
+        #       This also affects isolated builds and it should.
+
+        if options.no_input:
+            os.environ['PIP_NO_INPUT'] = '1'
+
+        if options.exists_action:
+            os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
+
+        if options.require_venv and not self.ignore_require_venv:
+            # If a venv is required check if it can really be found
+            if not running_under_virtualenv():
+                logger.critical(
+                    'Could not find an activated virtualenv (required).'
+                )
+                sys.exit(VIRTUALENV_NOT_FOUND)
+
+        try:
+            status = self.run(options, args)
+            # FIXME: all commands should return an exit status
+            # and when it is done, isinstance is not needed anymore
+            if isinstance(status, int):
+                return status
+        except PreviousBuildDirError as exc:
+            logger.critical(str(exc))
+            logger.debug('Exception information:', exc_info=True)
+
+            return PREVIOUS_BUILD_DIR_ERROR
+        except (InstallationError, UninstallationError, BadCommand) as exc:
+            logger.critical(str(exc))
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except CommandError as exc:
+            logger.critical('%s', exc)
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except BrokenStdoutLoggingError:
+            # Bypass our logger and write any remaining messages to stderr
+            # because stdout no longer works.
+            print('ERROR: Pipe to stdout was broken', file=sys.stderr)
+            if level_number <= logging.DEBUG:
+                traceback.print_exc(file=sys.stderr)
+
+            return ERROR
+        except KeyboardInterrupt:
+            logger.critical('Operation cancelled by user')
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except BaseException:
+            logger.critical('Exception:', exc_info=True)
+
+            return UNKNOWN_ERROR
+        finally:
+            allow_version_check = (
+                # Does this command have the index_group options?
+                hasattr(options, "no_index") and
+                # Is this command allowed to perform this check?
+                not (options.disable_pip_version_check or options.no_index)
+            )
+            # Check if we're using the latest version of pip available
+            if allow_version_check:
+                session = self._build_session(
+                    options,
+                    retries=0,
+                    timeout=min(5, options.timeout)
+                )
+                with session:
+                    pip_version_check(session, options)
+
+            # Shutdown the logging module
+            logging.shutdown()
+
+        return SUCCESS
+
+
+class RequirementCommand(Command):
+
+    @staticmethod
+    def populate_requirement_set(requirement_set,  # type: RequirementSet
+                                 args,             # type: List[str]
+                                 options,          # type: Values
+                                 finder,           # type: PackageFinder
+                                 session,          # type: PipSession
+                                 name,             # type: str
+                                 wheel_cache       # type: Optional[WheelCache]
+                                 ):
+        # type: (...) -> None
+        """
+        Marshal cmd line args into a requirement set.
+        """
+        # NOTE: As a side-effect, options.require_hashes and
+        #       requirement_set.require_hashes may be updated
+
+        for filename in options.constraints:
+            for req_to_add in parse_requirements(
+                    filename,
+                    constraint=True, finder=finder, options=options,
+                    session=session, wheel_cache=wheel_cache):
+                req_to_add.is_direct = True
+                requirement_set.add_requirement(req_to_add)
+
+        for req in args:
+            req_to_add = install_req_from_line(
+                req, None, isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                wheel_cache=wheel_cache
+            )
+            req_to_add.is_direct = True
+            requirement_set.add_requirement(req_to_add)
+
+        for req in options.editables:
+            req_to_add = install_req_from_editable(
+                req,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                wheel_cache=wheel_cache
+            )
+            req_to_add.is_direct = True
+            requirement_set.add_requirement(req_to_add)
+
+        for filename in options.requirements:
+            for req_to_add in parse_requirements(
+                    filename,
+                    finder=finder, options=options, session=session,
+                    wheel_cache=wheel_cache,
+                    use_pep517=options.use_pep517):
+                req_to_add.is_direct = True
+                requirement_set.add_requirement(req_to_add)
+        # If --require-hashes was a line in a requirements file, tell
+        # RequirementSet about it:
+        requirement_set.require_hashes = options.require_hashes
+
+        if not (args or options.editables or options.requirements):
+            opts = {'name': name}
+            if options.find_links:
+                raise CommandError(
+                    'You must give at least one requirement to %(name)s '
+                    '(maybe you meant "pip %(name)s %(links)s"?)' %
+                    dict(opts, links=' '.join(options.find_links)))
+            else:
+                raise CommandError(
+                    'You must give at least one requirement to %(name)s '
+                    '(see "pip help %(name)s")' % opts)
+
+    def _build_package_finder(
+        self,
+        options,               # type: Values
+        session,               # type: PipSession
+        target_python=None,    # type: Optional[TargetPython]
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> PackageFinder
+        """
+        Create a package finder appropriate to this requirement command.
+
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        search_scope = make_search_scope(options)
+        selection_prefs = SelectionPreferences(
+            allow_yanked=True,
+            format_control=options.format_control,
+            allow_all_prereleases=options.pre,
+            prefer_binary=options.prefer_binary,
+            ignore_requires_python=ignore_requires_python,
+        )
+
+        return PackageFinder.create(
+            search_scope=search_scope,
+            selection_prefs=selection_prefs,
+            trusted_hosts=options.trusted_hosts,
+            session=session,
+            target_python=target_python,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py
new file mode 100644
index 00000000..ecf4d20b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py
@@ -0,0 +1,929 @@
+"""
+shared options and groups
+
+The principle here is to define options once, but *not* instantiate them
+globally. One reason being that options with action='append' can carry state
+between parses. pip parses general options twice internally, and shouldn't
+pass on state. To be consistent, all options will follow this design.
+
+"""
+from __future__ import absolute_import
+
+import logging
+import textwrap
+import warnings
+from distutils.util import strtobool
+from functools import partial
+from optparse import SUPPRESS_HELP, Option, OptionGroup
+from textwrap import dedent
+
+from pip._internal.exceptions import CommandError
+from pip._internal.locations import USER_CACHE_DIR, get_src_prefix
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.index import PyPI
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.models.target_python import TargetPython
+from pip._internal.utils.hashes import STRONG_HASHES
+from pip._internal.utils.misc import redact_password_from_url
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.ui import BAR_TYPES
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Callable, Dict, Optional, Tuple
+    from optparse import OptionParser, Values
+    from pip._internal.cli.parser import ConfigOptionParser
+
+logger = logging.getLogger(__name__)
+
+
+def raise_option_error(parser, option, msg):
+    """
+    Raise an option parsing error using parser.error().
+
+    Args:
+      parser: an OptionParser instance.
+      option: an Option instance.
+      msg: the error text.
+    """
+    msg = '{} error: {}'.format(option, msg)
+    msg = textwrap.fill(' '.join(msg.split()))
+    parser.error(msg)
+
+
+def make_option_group(group, parser):
+    # type: (Dict[str, Any], ConfigOptionParser) -> OptionGroup
+    """
+    Return an OptionGroup object
+    group  -- assumed to be dict with 'name' and 'options' keys
+    parser -- an optparse Parser
+    """
+    option_group = OptionGroup(parser, group['name'])
+    for option in group['options']:
+        option_group.add_option(option())
+    return option_group
+
+
+def check_install_build_global(options, check_options=None):
+    # type: (Values, Optional[Values]) -> None
+    """Disable wheels if per-setup.py call options are set.
+
+    :param options: The OptionParser options to update.
+    :param check_options: The options to check, if not supplied defaults to
+        options.
+    """
+    if check_options is None:
+        check_options = options
+
+    def getname(n):
+        return getattr(check_options, n, None)
+    names = ["build_options", "global_options", "install_options"]
+    if any(map(getname, names)):
+        control = options.format_control
+        control.disallow_binaries()
+        warnings.warn(
+            'Disabling all use of wheels due to the use of --build-options '
+            '/ --global-options / --install-options.', stacklevel=2,
+        )
+
+
+def check_dist_restriction(options, check_target=False):
+    # type: (Values, bool) -> None
+    """Function for determining if custom platform options are allowed.
+
+    :param options: The OptionParser options.
+    :param check_target: Whether or not to check if --target is being used.
+    """
+    dist_restriction_set = any([
+        options.python_version,
+        options.platform,
+        options.abi,
+        options.implementation,
+    ])
+
+    binary_only = FormatControl(set(), {':all:'})
+    sdist_dependencies_allowed = (
+        options.format_control != binary_only and
+        not options.ignore_dependencies
+    )
+
+    # Installations or downloads using dist restrictions must not combine
+    # source distributions and dist-specific wheels, as they are not
+    # guaranteed to be locally compatible.
+    if dist_restriction_set and sdist_dependencies_allowed:
+        raise CommandError(
+            "When restricting platform and interpreter constraints using "
+            "--python-version, --platform, --abi, or --implementation, "
+            "either --no-deps must be set, or --only-binary=:all: must be "
+            "set and --no-binary must not be set (or must be set to "
+            ":none:)."
+        )
+
+    if check_target:
+        if dist_restriction_set and not options.target_dir:
+            raise CommandError(
+                "Can not use any platform or abi specific options unless "
+                "installing via '--target'"
+            )
+
+
+###########
+# options #
+###########
+
+help_ = partial(
+    Option,
+    '-h', '--help',
+    dest='help',
+    action='help',
+    help='Show help.',
+)  # type: Callable[..., Option]
+
+isolated_mode = partial(
+    Option,
+    "--isolated",
+    dest="isolated_mode",
+    action="store_true",
+    default=False,
+    help=(
+        "Run pip in an isolated mode, ignoring environment variables and user "
+        "configuration."
+    ),
+)  # type: Callable[..., Option]
+
+require_virtualenv = partial(
+    Option,
+    # Run only if inside a virtualenv, bail if not.
+    '--require-virtualenv', '--require-venv',
+    dest='require_venv',
+    action='store_true',
+    default=False,
+    help=SUPPRESS_HELP
+)  # type: Callable[..., Option]
+
+verbose = partial(
+    Option,
+    '-v', '--verbose',
+    dest='verbose',
+    action='count',
+    default=0,
+    help='Give more output. Option is additive, and can be used up to 3 times.'
+)  # type: Callable[..., Option]
+
+no_color = partial(
+    Option,
+    '--no-color',
+    dest='no_color',
+    action='store_true',
+    default=False,
+    help="Suppress colored output",
+)  # type: Callable[..., Option]
+
+version = partial(
+    Option,
+    '-V', '--version',
+    dest='version',
+    action='store_true',
+    help='Show version and exit.',
+)  # type: Callable[..., Option]
+
+quiet = partial(
+    Option,
+    '-q', '--quiet',
+    dest='quiet',
+    action='count',
+    default=0,
+    help=(
+        'Give less output. Option is additive, and can be used up to 3'
+        ' times (corresponding to WARNING, ERROR, and CRITICAL logging'
+        ' levels).'
+    ),
+)  # type: Callable[..., Option]
+
+progress_bar = partial(
+    Option,
+    '--progress-bar',
+    dest='progress_bar',
+    type='choice',
+    choices=list(BAR_TYPES.keys()),
+    default='on',
+    help=(
+        'Specify type of progress to be displayed [' +
+        '|'.join(BAR_TYPES.keys()) + '] (default: %default)'
+    ),
+)  # type: Callable[..., Option]
+
+log = partial(
+    Option,
+    "--log", "--log-file", "--local-log",
+    dest="log",
+    metavar="path",
+    help="Path to a verbose appending log."
+)  # type: Callable[..., Option]
+
+no_input = partial(
+    Option,
+    # Don't ask for input
+    '--no-input',
+    dest='no_input',
+    action='store_true',
+    default=False,
+    help=SUPPRESS_HELP
+)  # type: Callable[..., Option]
+
+proxy = partial(
+    Option,
+    '--proxy',
+    dest='proxy',
+    type='str',
+    default='',
+    help="Specify a proxy in the form [user:passwd@]proxy.server:port."
+)  # type: Callable[..., Option]
+
+retries = partial(
+    Option,
+    '--retries',
+    dest='retries',
+    type='int',
+    default=5,
+    help="Maximum number of retries each connection should attempt "
+         "(default %default times).",
+)  # type: Callable[..., Option]
+
+timeout = partial(
+    Option,
+    '--timeout', '--default-timeout',
+    metavar='sec',
+    dest='timeout',
+    type='float',
+    default=15,
+    help='Set the socket timeout (default %default seconds).',
+)  # type: Callable[..., Option]
+
+skip_requirements_regex = partial(
+    Option,
+    # A regex to be used to skip requirements
+    '--skip-requirements-regex',
+    dest='skip_requirements_regex',
+    type='str',
+    default='',
+    help=SUPPRESS_HELP,
+)  # type: Callable[..., Option]
+
+
+def exists_action():
+    # type: () -> Option
+    return Option(
+        # Option when path already exist
+        '--exists-action',
+        dest='exists_action',
+        type='choice',
+        choices=['s', 'i', 'w', 'b', 'a'],
+        default=[],
+        action='append',
+        metavar='action',
+        help="Default action when a path already exists: "
+             "(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.",
+    )
+
+
+cert = partial(
+    Option,
+    '--cert',
+    dest='cert',
+    type='str',
+    metavar='path',
+    help="Path to alternate CA bundle.",
+)  # type: Callable[..., Option]
+
+client_cert = partial(
+    Option,
+    '--client-cert',
+    dest='client_cert',
+    type='str',
+    default=None,
+    metavar='path',
+    help="Path to SSL client certificate, a single file containing the "
+         "private key and the certificate in PEM format.",
+)  # type: Callable[..., Option]
+
+index_url = partial(
+    Option,
+    '-i', '--index-url', '--pypi-url',
+    dest='index_url',
+    metavar='URL',
+    default=PyPI.simple_url,
+    help="Base URL of the Python Package Index (default %default). "
+         "This should point to a repository compliant with PEP 503 "
+         "(the simple repository API) or a local directory laid out "
+         "in the same format.",
+)  # type: Callable[..., Option]
+
+
+def extra_index_url():
+    return Option(
+        '--extra-index-url',
+        dest='extra_index_urls',
+        metavar='URL',
+        action='append',
+        default=[],
+        help="Extra URLs of package indexes to use in addition to "
+             "--index-url. Should follow the same rules as "
+             "--index-url.",
+    )
+
+
+no_index = partial(
+    Option,
+    '--no-index',
+    dest='no_index',
+    action='store_true',
+    default=False,
+    help='Ignore package index (only looking at --find-links URLs instead).',
+)  # type: Callable[..., Option]
+
+
+def find_links():
+    # type: () -> Option
+    return Option(
+        '-f', '--find-links',
+        dest='find_links',
+        action='append',
+        default=[],
+        metavar='url',
+        help="If a url or path to an html file, then parse for links to "
+             "archives. If a local path or file:// url that's a directory, "
+             "then look for archives in the directory listing.",
+    )
+
+
+def make_search_scope(options, suppress_no_index=False):
+    # type: (Values, bool) -> SearchScope
+    """
+    :param suppress_no_index: Whether to ignore the --no-index option
+        when constructing the SearchScope object.
+    """
+    index_urls = [options.index_url] + options.extra_index_urls
+    if options.no_index and not suppress_no_index:
+        logger.debug(
+            'Ignoring indexes: %s',
+            ','.join(redact_password_from_url(url) for url in index_urls),
+        )
+        index_urls = []
+
+    search_scope = SearchScope(
+        find_links=options.find_links,
+        index_urls=index_urls,
+    )
+
+    return search_scope
+
+
+def trusted_host():
+    # type: () -> Option
+    return Option(
+        "--trusted-host",
+        dest="trusted_hosts",
+        action="append",
+        metavar="HOSTNAME",
+        default=[],
+        help="Mark this host as trusted, even though it does not have valid "
+             "or any HTTPS.",
+    )
+
+
+def constraints():
+    # type: () -> Option
+    return Option(
+        '-c', '--constraint',
+        dest='constraints',
+        action='append',
+        default=[],
+        metavar='file',
+        help='Constrain versions using the given constraints file. '
+        'This option can be used multiple times.'
+    )
+
+
+def requirements():
+    # type: () -> Option
+    return Option(
+        '-r', '--requirement',
+        dest='requirements',
+        action='append',
+        default=[],
+        metavar='file',
+        help='Install from the given requirements file. '
+        'This option can be used multiple times.'
+    )
+
+
+def editable():
+    # type: () -> Option
+    return Option(
+        '-e', '--editable',
+        dest='editables',
+        action='append',
+        default=[],
+        metavar='path/url',
+        help=('Install a project in editable mode (i.e. setuptools '
+              '"develop mode") from a local project path or a VCS url.'),
+    )
+
+
+src = partial(
+    Option,
+    '--src', '--source', '--source-dir', '--source-directory',
+    dest='src_dir',
+    metavar='dir',
+    default=get_src_prefix(),
+    help='Directory to check out editable projects into. '
+    'The default in a virtualenv is "<venv path>/src". '
+    'The default for global installs is "<current dir>/src".'
+)  # type: Callable[..., Option]
+
+
+def _get_format_control(values, option):
+    # type: (Values, Option) -> Any
+    """Get a format_control object."""
+    return getattr(values, option.dest)
+
+
+def _handle_no_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value, existing.no_binary, existing.only_binary,
+    )
+
+
+def _handle_only_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value, existing.only_binary, existing.no_binary,
+    )
+
+
+def no_binary():
+    # type: () -> Option
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--no-binary", dest="format_control", action="callback",
+        callback=_handle_no_binary, type="str",
+        default=format_control,
+        help="Do not use binary packages. Can be supplied multiple times, and "
+             "each time adds to the existing value. Accepts either :all: to "
+             "disable all binary packages, :none: to empty the set, or one or "
+             "more package names with commas between them. Note that some "
+             "packages are tricky to compile and may fail to install when "
+             "this option is used on them.",
+    )
+
+
+def only_binary():
+    # type: () -> Option
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--only-binary", dest="format_control", action="callback",
+        callback=_handle_only_binary, type="str",
+        default=format_control,
+        help="Do not use source packages. Can be supplied multiple times, and "
+             "each time adds to the existing value. Accepts either :all: to "
+             "disable all source packages, :none: to empty the set, or one or "
+             "more package names with commas between them. Packages without "
+             "binary distributions will fail to install when this option is "
+             "used on them.",
+    )
+
+
+platform = partial(
+    Option,
+    '--platform',
+    dest='platform',
+    metavar='platform',
+    default=None,
+    help=("Only use wheels compatible with <platform>. "
+          "Defaults to the platform of the running system."),
+)  # type: Callable[..., Option]
+
+
+# This was made a separate function for unit-testing purposes.
+def _convert_python_version(value):
+    # type: (str) -> Tuple[Tuple[int, ...], Optional[str]]
+    """
+    Convert a version string like "3", "37", or "3.7.3" into a tuple of ints.
+
+    :return: A 2-tuple (version_info, error_msg), where `error_msg` is
+        non-None if and only if there was a parsing error.
+    """
+    if not value:
+        # The empty string is the same as not providing a value.
+        return (None, None)
+
+    parts = value.split('.')
+    if len(parts) > 3:
+        return ((), 'at most three version parts are allowed')
+
+    if len(parts) == 1:
+        # Then we are in the case of "3" or "37".
+        value = parts[0]
+        if len(value) > 1:
+            parts = [value[0], value[1:]]
+
+    try:
+        version_info = tuple(int(part) for part in parts)
+    except ValueError:
+        return ((), 'each version part must be an integer')
+
+    return (version_info, None)
+
+
+def _handle_python_version(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Handle a provided --python-version value.
+    """
+    version_info, error_msg = _convert_python_version(value)
+    if error_msg is not None:
+        msg = (
+            'invalid --python-version value: {!r}: {}'.format(
+                value, error_msg,
+            )
+        )
+        raise_option_error(parser, option=option, msg=msg)
+
+    parser.values.python_version = version_info
+
+
+python_version = partial(
+    Option,
+    '--python-version',
+    dest='python_version',
+    metavar='python_version',
+    action='callback',
+    callback=_handle_python_version, type='str',
+    default=None,
+    help=dedent("""\
+    The Python interpreter version to use for wheel and "Requires-Python"
+    compatibility checks. Defaults to a version derived from the running
+    interpreter. The version can be specified using up to three dot-separated
+    integers (e.g. "3" for 3.0.0, "3.7" for 3.7.0, or "3.7.3"). A major-minor
+    version can also be given as a string without dots (e.g. "37" for 3.7.0).
+    """),
+)  # type: Callable[..., Option]
+
+
+implementation = partial(
+    Option,
+    '--implementation',
+    dest='implementation',
+    metavar='implementation',
+    default=None,
+    help=("Only use wheels compatible with Python "
+          "implementation <implementation>, e.g. 'pp', 'jy', 'cp', "
+          " or 'ip'. If not specified, then the current "
+          "interpreter implementation is used.  Use 'py' to force "
+          "implementation-agnostic wheels."),
+)  # type: Callable[..., Option]
+
+
+abi = partial(
+    Option,
+    '--abi',
+    dest='abi',
+    metavar='abi',
+    default=None,
+    help=("Only use wheels compatible with Python "
+          "abi <abi>, e.g. 'pypy_41'.  If not specified, then the "
+          "current interpreter abi tag is used.  Generally "
+          "you will need to specify --implementation, "
+          "--platform, and --python-version when using "
+          "this option."),
+)  # type: Callable[..., Option]
+
+
+def add_target_python_options(cmd_opts):
+    # type: (OptionGroup) -> None
+    cmd_opts.add_option(platform())
+    cmd_opts.add_option(python_version())
+    cmd_opts.add_option(implementation())
+    cmd_opts.add_option(abi())
+
+
+def make_target_python(options):
+    # type: (Values) -> TargetPython
+    target_python = TargetPython(
+        platform=options.platform,
+        py_version_info=options.python_version,
+        abi=options.abi,
+        implementation=options.implementation,
+    )
+
+    return target_python
+
+
+def prefer_binary():
+    # type: () -> Option
+    return Option(
+        "--prefer-binary",
+        dest="prefer_binary",
+        action="store_true",
+        default=False,
+        help="Prefer older binary packages over newer source packages."
+    )
+
+
+cache_dir = partial(
+    Option,
+    "--cache-dir",
+    dest="cache_dir",
+    default=USER_CACHE_DIR,
+    metavar="dir",
+    help="Store the cache data in <dir>."
+)  # type: Callable[..., Option]
+
+
+def _handle_no_cache_dir(option, opt, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Process a value provided for the --no-cache-dir option.
+
+    This is an optparse.Option callback for the --no-cache-dir option.
+    """
+    # The value argument will be None if --no-cache-dir is passed via the
+    # command-line, since the option doesn't accept arguments.  However,
+    # the value can be non-None if the option is triggered e.g. by an
+    # environment variable, like PIP_NO_CACHE_DIR=true.
+    if value is not None:
+        # Then parse the string value to get argument error-checking.
+        try:
+            strtobool(value)
+        except ValueError as exc:
+            raise_option_error(parser, option=option, msg=str(exc))
+
+    # Originally, setting PIP_NO_CACHE_DIR to a value that strtobool()
+    # converted to 0 (like "false" or "no") caused cache_dir to be disabled
+    # rather than enabled (logic would say the latter).  Thus, we disable
+    # the cache directory not just on values that parse to True, but (for
+    # backwards compatibility reasons) also on values that parse to False.
+    # In other words, always set it to False if the option is provided in
+    # some (valid) form.
+    parser.values.cache_dir = False
+
+
+no_cache = partial(
+    Option,
+    "--no-cache-dir",
+    dest="cache_dir",
+    action="callback",
+    callback=_handle_no_cache_dir,
+    help="Disable the cache.",
+)  # type: Callable[..., Option]
+
+no_deps = partial(
+    Option,
+    '--no-deps', '--no-dependencies',
+    dest='ignore_dependencies',
+    action='store_true',
+    default=False,
+    help="Don't install package dependencies.",
+)  # type: Callable[..., Option]
+
+build_dir = partial(
+    Option,
+    '-b', '--build', '--build-dir', '--build-directory',
+    dest='build_dir',
+    metavar='dir',
+    help='Directory to unpack packages into and build in. Note that '
+         'an initial build still takes place in a temporary directory. '
+         'The location of temporary directories can be controlled by setting '
+         'the TMPDIR environment variable (TEMP on Windows) appropriately. '
+         'When passed, build directories are not cleaned in case of failures.'
+)  # type: Callable[..., Option]
+
+ignore_requires_python = partial(
+    Option,
+    '--ignore-requires-python',
+    dest='ignore_requires_python',
+    action='store_true',
+    help='Ignore the Requires-Python information.'
+)  # type: Callable[..., Option]
+
+no_build_isolation = partial(
+    Option,
+    '--no-build-isolation',
+    dest='build_isolation',
+    action='store_false',
+    default=True,
+    help='Disable isolation when building a modern source distribution. '
+         'Build dependencies specified by PEP 518 must be already installed '
+         'if this option is used.'
+)  # type: Callable[..., Option]
+
+
+def _handle_no_use_pep517(option, opt, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Process a value provided for the --no-use-pep517 option.
+
+    This is an optparse.Option callback for the no_use_pep517 option.
+    """
+    # Since --no-use-pep517 doesn't accept arguments, the value argument
+    # will be None if --no-use-pep517 is passed via the command-line.
+    # However, the value can be non-None if the option is triggered e.g.
+    # by an environment variable, for example "PIP_NO_USE_PEP517=true".
+    if value is not None:
+        msg = """A value was passed for --no-use-pep517,
+        probably using either the PIP_NO_USE_PEP517 environment variable
+        or the "no-use-pep517" config file option. Use an appropriate value
+        of the PIP_USE_PEP517 environment variable or the "use-pep517"
+        config file option instead.
+        """
+        raise_option_error(parser, option=option, msg=msg)
+
+    # Otherwise, --no-use-pep517 was passed via the command-line.
+    parser.values.use_pep517 = False
+
+
+use_pep517 = partial(
+    Option,
+    '--use-pep517',
+    dest='use_pep517',
+    action='store_true',
+    default=None,
+    help='Use PEP 517 for building source distributions '
+         '(use --no-use-pep517 to force legacy behaviour).'
+)  # type: Any
+
+no_use_pep517 = partial(
+    Option,
+    '--no-use-pep517',
+    dest='use_pep517',
+    action='callback',
+    callback=_handle_no_use_pep517,
+    default=None,
+    help=SUPPRESS_HELP
+)  # type: Any
+
+install_options = partial(
+    Option,
+    '--install-option',
+    dest='install_options',
+    action='append',
+    metavar='options',
+    help="Extra arguments to be supplied to the setup.py install "
+         "command (use like --install-option=\"--install-scripts=/usr/local/"
+         "bin\"). Use multiple --install-option options to pass multiple "
+         "options to setup.py install. If you are using an option with a "
+         "directory path, be sure to use absolute path.",
+)  # type: Callable[..., Option]
+
+global_options = partial(
+    Option,
+    '--global-option',
+    dest='global_options',
+    action='append',
+    metavar='options',
+    help="Extra global options to be supplied to the setup.py "
+         "call before the install command.",
+)  # type: Callable[..., Option]
+
+no_clean = partial(
+    Option,
+    '--no-clean',
+    action='store_true',
+    default=False,
+    help="Don't clean up build directories."
+)  # type: Callable[..., Option]
+
+pre = partial(
+    Option,
+    '--pre',
+    action='store_true',
+    default=False,
+    help="Include pre-release and development versions. By default, "
+         "pip only finds stable versions.",
+)  # type: Callable[..., Option]
+
+disable_pip_version_check = partial(
+    Option,
+    "--disable-pip-version-check",
+    dest="disable_pip_version_check",
+    action="store_true",
+    default=False,
+    help="Don't periodically check PyPI to determine whether a new version "
+         "of pip is available for download. Implied with --no-index.",
+)  # type: Callable[..., Option]
+
+
+# Deprecated, Remove later
+always_unzip = partial(
+    Option,
+    '-Z', '--always-unzip',
+    dest='always_unzip',
+    action='store_true',
+    help=SUPPRESS_HELP,
+)  # type: Callable[..., Option]
+
+
+def _handle_merge_hash(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """Given a value spelled "algo:digest", append the digest to a list
+    pointed to in a dict by the algo name."""
+    if not parser.values.hashes:
+        parser.values.hashes = {}
+    try:
+        algo, digest = value.split(':', 1)
+    except ValueError:
+        parser.error('Arguments to %s must be a hash name '
+                     'followed by a value, like --hash=sha256:abcde...' %
+                     opt_str)
+    if algo not in STRONG_HASHES:
+        parser.error('Allowed hash algorithms for %s are %s.' %
+                     (opt_str, ', '.join(STRONG_HASHES)))
+    parser.values.hashes.setdefault(algo, []).append(digest)
+
+
+hash = partial(
+    Option,
+    '--hash',
+    # Hash values eventually end up in InstallRequirement.hashes due to
+    # __dict__ copying in process_line().
+    dest='hashes',
+    action='callback',
+    callback=_handle_merge_hash,
+    type='string',
+    help="Verify that the package's archive matches this "
+         'hash before installing. Example: --hash=sha256:abcdef...',
+)  # type: Callable[..., Option]
+
+
+require_hashes = partial(
+    Option,
+    '--require-hashes',
+    dest='require_hashes',
+    action='store_true',
+    default=False,
+    help='Require a hash to check each requirement against, for '
+         'repeatable installs. This option is implied when any package in a '
+         'requirements file has a --hash option.',
+)  # type: Callable[..., Option]
+
+
+list_path = partial(
+    Option,
+    '--path',
+    dest='path',
+    action='append',
+    help='Restrict to the specified installation path for listing '
+         'packages (can be used multiple times).'
+)  # type: Callable[..., Option]
+
+
+def check_list_path_option(options):
+    # type: (Values) -> None
+    if options.path and (options.user or options.local):
+        raise CommandError(
+            "Cannot combine '--path' with '--user' or '--local'"
+        )
+
+
+##########
+# groups #
+##########
+
+general_group = {
+    'name': 'General Options',
+    'options': [
+        help_,
+        isolated_mode,
+        require_virtualenv,
+        verbose,
+        version,
+        quiet,
+        log,
+        no_input,
+        proxy,
+        retries,
+        timeout,
+        skip_requirements_regex,
+        exists_action,
+        trusted_host,
+        cert,
+        client_cert,
+        cache_dir,
+        no_cache,
+        disable_pip_version_check,
+        no_color,
+    ]
+}  # type: Dict[str, Any]
+
+index_group = {
+    'name': 'Package Index Options',
+    'options': [
+        index_url,
+        extra_index_url,
+        no_index,
+        find_links,
+    ]
+}  # type: Dict[str, Any]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py
new file mode 100644
index 00000000..6d0b719a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py
@@ -0,0 +1,98 @@
+"""A single place for constructing and exposing the main parser
+"""
+
+import os
+import sys
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.parser import (
+    ConfigOptionParser, UpdatingDefaultsHelpFormatter,
+)
+from pip._internal.commands import (
+    commands_dict, get_similar_commands, get_summaries,
+)
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.misc import get_pip_version, get_prog
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Tuple, List
+
+
+__all__ = ["create_main_parser", "parse_command"]
+
+
+def create_main_parser():
+    # type: () -> ConfigOptionParser
+    """Creates and returns the main parser for pip's CLI
+    """
+
+    parser_kw = {
+        'usage': '\n%prog <command> [options]',
+        'add_help_option': False,
+        'formatter': UpdatingDefaultsHelpFormatter(),
+        'name': 'global',
+        'prog': get_prog(),
+    }
+
+    parser = ConfigOptionParser(**parser_kw)
+    parser.disable_interspersed_args()
+
+    parser.version = get_pip_version()
+
+    # add the general options
+    gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
+    parser.add_option_group(gen_opts)
+
+    # so the help formatter knows
+    parser.main = True  # type: ignore
+
+    # create command listing for description
+    command_summaries = get_summaries()
+    description = [''] + ['%-27s %s' % (i, j) for i, j in command_summaries]
+    parser.description = '\n'.join(description)
+
+    return parser
+
+
+def parse_command(args):
+    # type: (List[str]) -> Tuple[str, List[str]]
+    parser = create_main_parser()
+
+    # Note: parser calls disable_interspersed_args(), so the result of this
+    # call is to split the initial args into the general options before the
+    # subcommand and everything else.
+    # For example:
+    #  args: ['--timeout=5', 'install', '--user', 'INITools']
+    #  general_options: ['--timeout==5']
+    #  args_else: ['install', '--user', 'INITools']
+    general_options, args_else = parser.parse_args(args)
+
+    # --version
+    if general_options.version:
+        sys.stdout.write(parser.version)  # type: ignore
+        sys.stdout.write(os.linesep)
+        sys.exit()
+
+    # pip || pip help -> print_help()
+    if not args_else or (args_else[0] == 'help' and len(args_else) == 1):
+        parser.print_help()
+        sys.exit()
+
+    # the subcommand name
+    cmd_name = args_else[0]
+
+    if cmd_name not in commands_dict:
+        guess = get_similar_commands(cmd_name)
+
+        msg = ['unknown command "%s"' % cmd_name]
+        if guess:
+            msg.append('maybe you meant "%s"' % guess)
+
+        raise CommandError(' - '.join(msg))
+
+    # all the args without the subcommand
+    cmd_args = args[:]
+    cmd_args.remove(cmd_name)
+
+    return cmd_name, cmd_args
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/parser.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/parser.py
new file mode 100644
index 00000000..e1eaac42
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/parser.py
@@ -0,0 +1,261 @@
+"""Base option parser setup"""
+from __future__ import absolute_import
+
+import logging
+import optparse
+import sys
+import textwrap
+from distutils.util import strtobool
+
+from pip._vendor.six import string_types
+
+from pip._internal.cli.status_codes import UNKNOWN_ERROR
+from pip._internal.configuration import Configuration, ConfigurationError
+from pip._internal.utils.compat import get_terminal_size
+
+logger = logging.getLogger(__name__)
+
+
+class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
+    """A prettier/less verbose help formatter for optparse."""
+
+    def __init__(self, *args, **kwargs):
+        # help position must be aligned with __init__.parseopts.description
+        kwargs['max_help_position'] = 30
+        kwargs['indent_increment'] = 1
+        kwargs['width'] = get_terminal_size()[0] - 2
+        optparse.IndentedHelpFormatter.__init__(self, *args, **kwargs)
+
+    def format_option_strings(self, option):
+        return self._format_option_strings(option, ' <%s>', ', ')
+
+    def _format_option_strings(self, option, mvarfmt=' <%s>', optsep=', '):
+        """
+        Return a comma-separated list of option strings and metavars.
+
+        :param option:  tuple of (short opt, long opt), e.g: ('-f', '--format')
+        :param mvarfmt: metavar format string - evaluated as mvarfmt % metavar
+        :param optsep:  separator
+        """
+        opts = []
+
+        if option._short_opts:
+            opts.append(option._short_opts[0])
+        if option._long_opts:
+            opts.append(option._long_opts[0])
+        if len(opts) > 1:
+            opts.insert(1, optsep)
+
+        if option.takes_value():
+            metavar = option.metavar or option.dest.lower()
+            opts.append(mvarfmt % metavar.lower())
+
+        return ''.join(opts)
+
+    def format_heading(self, heading):
+        if heading == 'Options':
+            return ''
+        return heading + ':\n'
+
+    def format_usage(self, usage):
+        """
+        Ensure there is only one newline between usage and the first heading
+        if there is no description.
+        """
+        msg = '\nUsage: %s\n' % self.indent_lines(textwrap.dedent(usage), "  ")
+        return msg
+
+    def format_description(self, description):
+        # leave full control over description to us
+        if description:
+            if hasattr(self.parser, 'main'):
+                label = 'Commands'
+            else:
+                label = 'Description'
+            # some doc strings have initial newlines, some don't
+            description = description.lstrip('\n')
+            # some doc strings have final newlines and spaces, some don't
+            description = description.rstrip()
+            # dedent, then reindent
+            description = self.indent_lines(textwrap.dedent(description), "  ")
+            description = '%s:\n%s\n' % (label, description)
+            return description
+        else:
+            return ''
+
+    def format_epilog(self, epilog):
+        # leave full control over epilog to us
+        if epilog:
+            return epilog
+        else:
+            return ''
+
+    def indent_lines(self, text, indent):
+        new_lines = [indent + line for line in text.split('\n')]
+        return "\n".join(new_lines)
+
+
+class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
+    """Custom help formatter for use in ConfigOptionParser.
+
+    This is updates the defaults before expanding them, allowing
+    them to show up correctly in the help listing.
+    """
+
+    def expand_default(self, option):
+        if self.parser is not None:
+            self.parser._update_defaults(self.parser.defaults)
+        return optparse.IndentedHelpFormatter.expand_default(self, option)
+
+
+class CustomOptionParser(optparse.OptionParser):
+
+    def insert_option_group(self, idx, *args, **kwargs):
+        """Insert an OptionGroup at a given position."""
+        group = self.add_option_group(*args, **kwargs)
+
+        self.option_groups.pop()
+        self.option_groups.insert(idx, group)
+
+        return group
+
+    @property
+    def option_list_all(self):
+        """Get a list of all options, including those in option groups."""
+        res = self.option_list[:]
+        for i in self.option_groups:
+            res.extend(i.option_list)
+
+        return res
+
+
+class ConfigOptionParser(CustomOptionParser):
+    """Custom option parser which updates its defaults by checking the
+    configuration files and environmental variables"""
+
+    def __init__(self, *args, **kwargs):
+        self.name = kwargs.pop('name')
+
+        isolated = kwargs.pop("isolated", False)
+        self.config = Configuration(isolated)
+
+        assert self.name
+        optparse.OptionParser.__init__(self, *args, **kwargs)
+
+    def check_default(self, option, key, val):
+        try:
+            return option.check_value(key, val)
+        except optparse.OptionValueError as exc:
+            print("An error occurred during configuration: %s" % exc)
+            sys.exit(3)
+
+    def _get_ordered_configuration_items(self):
+        # Configuration gives keys in an unordered manner. Order them.
+        override_order = ["global", self.name, ":env:"]
+
+        # Pool the options into different groups
+        section_items = {name: [] for name in override_order}
+        for section_key, val in self.config.items():
+            # ignore empty values
+            if not val:
+                logger.debug(
+                    "Ignoring configuration key '%s' as it's value is empty.",
+                    section_key
+                )
+                continue
+
+            section, key = section_key.split(".", 1)
+            if section in override_order:
+                section_items[section].append((key, val))
+
+        # Yield each group in their override order
+        for section in override_order:
+            for key, val in section_items[section]:
+                yield key, val
+
+    def _update_defaults(self, defaults):
+        """Updates the given defaults with values from the config files and
+        the environ. Does a little special handling for certain types of
+        options (lists)."""
+
+        # Accumulate complex default state.
+        self.values = optparse.Values(self.defaults)
+        late_eval = set()
+        # Then set the options with those values
+        for key, val in self._get_ordered_configuration_items():
+            # '--' because configuration supports only long names
+            option = self.get_option('--' + key)
+
+            # Ignore options not present in this parser. E.g. non-globals put
+            # in [global] by users that want them to apply to all applicable
+            # commands.
+            if option is None:
+                continue
+
+            if option.action in ('store_true', 'store_false', 'count'):
+                try:
+                    val = strtobool(val)
+                except ValueError:
+                    error_msg = invalid_config_error_message(
+                        option.action, key, val
+                    )
+                    self.error(error_msg)
+
+            elif option.action == 'append':
+                val = val.split()
+                val = [self.check_default(option, key, v) for v in val]
+            elif option.action == 'callback':
+                late_eval.add(option.dest)
+                opt_str = option.get_opt_string()
+                val = option.convert_value(opt_str, val)
+                # From take_action
+                args = option.callback_args or ()
+                kwargs = option.callback_kwargs or {}
+                option.callback(option, opt_str, val, self, *args, **kwargs)
+            else:
+                val = self.check_default(option, key, val)
+
+            defaults[option.dest] = val
+
+        for key in late_eval:
+            defaults[key] = getattr(self.values, key)
+        self.values = None
+        return defaults
+
+    def get_default_values(self):
+        """Overriding to make updating the defaults after instantiation of
+        the option parser possible, _update_defaults() does the dirty work."""
+        if not self.process_default_values:
+            # Old, pre-Optik 1.5 behaviour.
+            return optparse.Values(self.defaults)
+
+        # Load the configuration, or error out in case of an error
+        try:
+            self.config.load()
+        except ConfigurationError as err:
+            self.exit(UNKNOWN_ERROR, str(err))
+
+        defaults = self._update_defaults(self.defaults.copy())  # ours
+        for option in self._get_all_options():
+            default = defaults.get(option.dest)
+            if isinstance(default, string_types):
+                opt_str = option.get_opt_string()
+                defaults[option.dest] = option.check_value(opt_str, default)
+        return optparse.Values(defaults)
+
+    def error(self, msg):
+        self.print_usage(sys.stderr)
+        self.exit(UNKNOWN_ERROR, "%s\n" % msg)
+
+
+def invalid_config_error_message(action, key, val):
+    """Returns a better error message when invalid configuration option
+    is provided."""
+    if action in ('store_true', 'store_false'):
+        return ("{0} is not a valid value for {1} option, "
+                "please specify a boolean value like yes/no, "
+                "true/false or 1/0 instead.").format(val, key)
+
+    return ("{0} is not a valid value for {1} option, "
+            "please specify a numerical value like 1/0 "
+            "instead.").format(val, key)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/status_codes.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/status_codes.py
new file mode 100644
index 00000000..275360a3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/cli/status_codes.py
@@ -0,0 +1,8 @@
+from __future__ import absolute_import
+
+SUCCESS = 0
+ERROR = 1
+UNKNOWN_ERROR = 2
+VIRTUALENV_NOT_FOUND = 3
+PREVIOUS_BUILD_DIR_ERROR = 4
+NO_MATCHES_FOUND = 23
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__init__.py
new file mode 100644
index 00000000..9e0ab86b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__init__.py
@@ -0,0 +1,81 @@
+"""
+Package containing all pip commands
+"""
+from __future__ import absolute_import
+
+from pip._internal.commands.completion import CompletionCommand
+from pip._internal.commands.configuration import ConfigurationCommand
+from pip._internal.commands.debug import DebugCommand
+from pip._internal.commands.download import DownloadCommand
+from pip._internal.commands.freeze import FreezeCommand
+from pip._internal.commands.hash import HashCommand
+from pip._internal.commands.help import HelpCommand
+from pip._internal.commands.list import ListCommand
+from pip._internal.commands.check import CheckCommand
+from pip._internal.commands.search import SearchCommand
+from pip._internal.commands.show import ShowCommand
+from pip._internal.commands.install import InstallCommand
+from pip._internal.commands.uninstall import UninstallCommand
+from pip._internal.commands.wheel import WheelCommand
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Type
+    from pip._internal.cli.base_command import Command
+
+commands_order = [
+    InstallCommand,
+    DownloadCommand,
+    UninstallCommand,
+    FreezeCommand,
+    ListCommand,
+    ShowCommand,
+    CheckCommand,
+    ConfigurationCommand,
+    SearchCommand,
+    WheelCommand,
+    HashCommand,
+    CompletionCommand,
+    DebugCommand,
+    HelpCommand,
+]  # type: List[Type[Command]]
+
+commands_dict = {c.name: c for c in commands_order}
+
+
+def get_summaries(ordered=True):
+    """Yields sorted (command name, command summary) tuples."""
+
+    if ordered:
+        cmditems = _sort_commands(commands_dict, commands_order)
+    else:
+        cmditems = commands_dict.items()
+
+    for name, command_class in cmditems:
+        yield (name, command_class.summary)
+
+
+def get_similar_commands(name):
+    """Command name auto-correct."""
+    from difflib import get_close_matches
+
+    name = name.lower()
+
+    close_commands = get_close_matches(name, commands_dict.keys())
+
+    if close_commands:
+        return close_commands[0]
+    else:
+        return False
+
+
+def _sort_commands(cmddict, order):
+    def keyfn(key):
+        try:
+            return order.index(key[1])
+        except ValueError:
+            # unordered items should come last
+            return 0xff
+
+    return sorted(cmddict.items(), key=keyfn)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..2cde7849
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/check.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/check.cpython-37.pyc
new file mode 100644
index 00000000..144e4054
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/check.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/completion.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/completion.cpython-37.pyc
new file mode 100644
index 00000000..7fdc69fe
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/completion.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/configuration.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/configuration.cpython-37.pyc
new file mode 100644
index 00000000..309428ab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/configuration.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/debug.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/debug.cpython-37.pyc
new file mode 100644
index 00000000..f7cac51b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/debug.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/download.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/download.cpython-37.pyc
new file mode 100644
index 00000000..2c9d0b1c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/download.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/freeze.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/freeze.cpython-37.pyc
new file mode 100644
index 00000000..4bc32147
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/freeze.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/hash.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/hash.cpython-37.pyc
new file mode 100644
index 00000000..353ce32a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/hash.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/help.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/help.cpython-37.pyc
new file mode 100644
index 00000000..a310cb1d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/help.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/install.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/install.cpython-37.pyc
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index 00000000..edf1d4e7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/install.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/list.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/list.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/list.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/search.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/search.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/search.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/show.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/show.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/show.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/uninstall.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/uninstall.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/uninstall.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/wheel.cpython-37.pyc
new file mode 100644
index 00000000..05e74585
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/__pycache__/wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/check.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/check.py
new file mode 100644
index 00000000..801cecc0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/check.py
@@ -0,0 +1,41 @@
+import logging
+
+from pip._internal.cli.base_command import Command
+from pip._internal.operations.check import (
+    check_package_set, create_package_set_from_installed,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class CheckCommand(Command):
+    """Verify installed packages have compatible dependencies."""
+    name = 'check'
+    usage = """
+      %prog [options]"""
+    summary = 'Verify installed packages have compatible dependencies.'
+
+    def run(self, options, args):
+        package_set, parsing_probs = create_package_set_from_installed()
+        missing, conflicting = check_package_set(package_set)
+
+        for project_name in missing:
+            version = package_set[project_name].version
+            for dependency in missing[project_name]:
+                logger.info(
+                    "%s %s requires %s, which is not installed.",
+                    project_name, version, dependency[0],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name].version
+            for dep_name, dep_version, req in conflicting[project_name]:
+                logger.info(
+                    "%s %s has requirement %s, but you have %s %s.",
+                    project_name, version, req, dep_name, dep_version,
+                )
+
+        if missing or conflicting or parsing_probs:
+            return 1
+        else:
+            logger.info("No broken requirements found.")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/completion.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/completion.py
new file mode 100644
index 00000000..2fcdd393
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/completion.py
@@ -0,0 +1,94 @@
+from __future__ import absolute_import
+
+import sys
+import textwrap
+
+from pip._internal.cli.base_command import Command
+from pip._internal.utils.misc import get_prog
+
+BASE_COMPLETION = """
+# pip %(shell)s completion start%(script)s# pip %(shell)s completion end
+"""
+
+COMPLETION_SCRIPTS = {
+    'bash': """
+        _pip_completion()
+        {
+            COMPREPLY=( $( COMP_WORDS="${COMP_WORDS[*]}" \\
+                           COMP_CWORD=$COMP_CWORD \\
+                           PIP_AUTO_COMPLETE=1 $1 ) )
+        }
+        complete -o default -F _pip_completion %(prog)s
+    """,
+    'zsh': """
+        function _pip_completion {
+          local words cword
+          read -Ac words
+          read -cn cword
+          reply=( $( COMP_WORDS="$words[*]" \\
+                     COMP_CWORD=$(( cword-1 )) \\
+                     PIP_AUTO_COMPLETE=1 $words[1] ) )
+        }
+        compctl -K _pip_completion %(prog)s
+    """,
+    'fish': """
+        function __fish_complete_pip
+            set -lx COMP_WORDS (commandline -o) ""
+            set -lx COMP_CWORD ( \\
+                math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
+            )
+            set -lx PIP_AUTO_COMPLETE 1
+            string split \\  -- (eval $COMP_WORDS[1])
+        end
+        complete -fa "(__fish_complete_pip)" -c %(prog)s
+    """,
+}
+
+
+class CompletionCommand(Command):
+    """A helper command to be used for command completion."""
+    name = 'completion'
+    summary = 'A helper command used for command completion.'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(CompletionCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(
+            '--bash', '-b',
+            action='store_const',
+            const='bash',
+            dest='shell',
+            help='Emit completion code for bash')
+        cmd_opts.add_option(
+            '--zsh', '-z',
+            action='store_const',
+            const='zsh',
+            dest='shell',
+            help='Emit completion code for zsh')
+        cmd_opts.add_option(
+            '--fish', '-f',
+            action='store_const',
+            const='fish',
+            dest='shell',
+            help='Emit completion code for fish')
+
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        """Prints the completion code of the given shell"""
+        shells = COMPLETION_SCRIPTS.keys()
+        shell_options = ['--' + shell for shell in sorted(shells)]
+        if options.shell in shells:
+            script = textwrap.dedent(
+                COMPLETION_SCRIPTS.get(options.shell, '') % {
+                    'prog': get_prog(),
+                }
+            )
+            print(BASE_COMPLETION % {'script': script, 'shell': options.shell})
+        else:
+            sys.stderr.write(
+                'ERROR: You must pass %s\n' % ' or '.join(shell_options)
+            )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/configuration.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/configuration.py
new file mode 100644
index 00000000..1ec77d2a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/configuration.py
@@ -0,0 +1,258 @@
+import logging
+import os
+import subprocess
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.configuration import (
+    Configuration, get_configuration_files, kinds,
+)
+from pip._internal.exceptions import PipError
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.misc import get_prog
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigurationCommand(Command):
+    """Manage local and global configuration.
+
+        Subcommands:
+
+        list: List the active configuration (or from the file specified)
+        edit: Edit the configuration file in an editor
+        get: Get the value associated with name
+        set: Set the name=value
+        unset: Unset the value associated with name
+
+        If none of --user, --global and --site are passed, a virtual
+        environment configuration file is used if one is active and the file
+        exists. Otherwise, all modifications happen on the to the user file by
+        default.
+    """
+
+    name = 'config'
+    usage = """
+        %prog [<file-option>] list
+        %prog [<file-option>] [--editor <editor-path>] edit
+
+        %prog [<file-option>] get name
+        %prog [<file-option>] set name value
+        %prog [<file-option>] unset name
+    """
+
+    summary = "Manage local and global configuration."
+
+    def __init__(self, *args, **kwargs):
+        super(ConfigurationCommand, self).__init__(*args, **kwargs)
+
+        self.configuration = None
+
+        self.cmd_opts.add_option(
+            '--editor',
+            dest='editor',
+            action='store',
+            default=None,
+            help=(
+                'Editor to use to edit the file. Uses VISUAL or EDITOR '
+                'environment variables if not provided.'
+            )
+        )
+
+        self.cmd_opts.add_option(
+            '--global',
+            dest='global_file',
+            action='store_true',
+            default=False,
+            help='Use the system-wide configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user_file',
+            action='store_true',
+            default=False,
+            help='Use the user configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--site',
+            dest='site_file',
+            action='store_true',
+            default=False,
+            help='Use the current environment configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--venv',
+            dest='venv_file',
+            action='store_true',
+            default=False,
+            help=(
+                '[Deprecated] Use the current environment configuration '
+                'file in a virtual environment only'
+            )
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        handlers = {
+            "list": self.list_values,
+            "edit": self.open_in_editor,
+            "get": self.get_name,
+            "set": self.set_name_value,
+            "unset": self.unset_name
+        }
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error("Need an action ({}) to perform.".format(
+                ", ".join(sorted(handlers)))
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Determine which configuration files are to be loaded
+        #    Depends on whether the command is modifying.
+        try:
+            load_only = self._determine_file(
+                options, need_value=(action in ["get", "set", "unset", "edit"])
+            )
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        # Load a new configuration
+        self.configuration = Configuration(
+            isolated=options.isolated_mode, load_only=load_only
+        )
+        self.configuration.load()
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def _determine_file(self, options, need_value):
+        # Convert legacy venv_file option to site_file or error
+        if options.venv_file and not options.site_file:
+            if running_under_virtualenv():
+                options.site_file = True
+                deprecated(
+                    "The --venv option has been deprecated.",
+                    replacement="--site",
+                    gone_in="19.3",
+                )
+            else:
+                raise PipError(
+                    "Legacy --venv option requires a virtual environment. "
+                    "Use --site instead."
+                )
+
+        file_options = [key for key, value in (
+            (kinds.USER, options.user_file),
+            (kinds.GLOBAL, options.global_file),
+            (kinds.SITE, options.site_file),
+        ) if value]
+
+        if not file_options:
+            if not need_value:
+                return None
+            # Default to user, unless there's a site file.
+            elif any(
+                os.path.exists(site_config_file)
+                for site_config_file in get_configuration_files()[kinds.SITE]
+            ):
+                return kinds.SITE
+            else:
+                return kinds.USER
+        elif len(file_options) == 1:
+            return file_options[0]
+
+        raise PipError(
+            "Need exactly one file to operate upon "
+            "(--user, --site, --global) to perform."
+        )
+
+    def list_values(self, options, args):
+        self._get_n_args(args, "list", n=0)
+
+        for key, value in sorted(self.configuration.items()):
+            logger.info("%s=%r", key, value)
+
+    def get_name(self, options, args):
+        key = self._get_n_args(args, "get [name]", n=1)
+        value = self.configuration.get_value(key)
+
+        logger.info("%s", value)
+
+    def set_name_value(self, options, args):
+        key, value = self._get_n_args(args, "set [name] [value]", n=2)
+        self.configuration.set_value(key, value)
+
+        self._save_configuration()
+
+    def unset_name(self, options, args):
+        key = self._get_n_args(args, "unset [name]", n=1)
+        self.configuration.unset_value(key)
+
+        self._save_configuration()
+
+    def open_in_editor(self, options, args):
+        editor = self._determine_editor(options)
+
+        fname = self.configuration.get_file_to_edit()
+        if fname is None:
+            raise PipError("Could not determine appropriate file.")
+
+        try:
+            subprocess.check_call([editor, fname])
+        except subprocess.CalledProcessError as e:
+            raise PipError(
+                "Editor Subprocess exited with exit code {}"
+                .format(e.returncode)
+            )
+
+    def _get_n_args(self, args, example, n):
+        """Helper to make sure the command got the right number of arguments
+        """
+        if len(args) != n:
+            msg = (
+                'Got unexpected number of arguments, expected {}. '
+                '(example: "{} config {}")'
+            ).format(n, get_prog(), example)
+            raise PipError(msg)
+
+        if n == 1:
+            return args[0]
+        else:
+            return args
+
+    def _save_configuration(self):
+        # We successfully ran a modifying command. Need to save the
+        # configuration.
+        try:
+            self.configuration.save()
+        except Exception:
+            logger.error(
+                "Unable to save configuration. Please report this as a bug.",
+                exc_info=1
+            )
+            raise PipError("Internal Error.")
+
+    def _determine_editor(self, options):
+        if options.editor is not None:
+            return options.editor
+        elif "VISUAL" in os.environ:
+            return os.environ["VISUAL"]
+        elif "EDITOR" in os.environ:
+            return os.environ["EDITOR"]
+        else:
+            raise PipError("Could not determine editor to use.")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/debug.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/debug.py
new file mode 100644
index 00000000..eb4f8c4e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/debug.py
@@ -0,0 +1,114 @@
+from __future__ import absolute_import
+
+import locale
+import logging
+import sys
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_pip_version
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.wheel import format_tag
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, List
+    from optparse import Values
+
+logger = logging.getLogger(__name__)
+
+
+def show_value(name, value):
+    # type: (str, str) -> None
+    logger.info('{}: {}'.format(name, value))
+
+
+def show_sys_implementation():
+    # type: () -> None
+    logger.info('sys.implementation:')
+    if hasattr(sys, 'implementation'):
+        implementation = sys.implementation  # type: ignore
+        implementation_name = implementation.name
+    else:
+        implementation_name = ''
+
+    with indent_log():
+        show_value('name', implementation_name)
+
+
+def show_tags(options):
+    # type: (Values) -> None
+    tag_limit = 10
+
+    target_python = make_target_python(options)
+    tags = target_python.get_tags()
+
+    # Display the target options that were explicitly provided.
+    formatted_target = target_python.format_given()
+    suffix = ''
+    if formatted_target:
+        suffix = ' (target: {})'.format(formatted_target)
+
+    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)
+    logger.info(msg)
+
+    if options.verbose < 1 and len(tags) > tag_limit:
+        tags_limited = True
+        tags = tags[:tag_limit]
+    else:
+        tags_limited = False
+
+    with indent_log():
+        for tag in tags:
+            logger.info(format_tag(tag))
+
+        if tags_limited:
+            msg = (
+                '...\n'
+                '[First {tag_limit} tags shown. Pass --verbose to show all.]'
+            ).format(tag_limit=tag_limit)
+            logger.info(msg)
+
+
+class DebugCommand(Command):
+    """
+    Display debug information.
+    """
+
+    name = 'debug'
+    usage = """
+      %prog <options>"""
+    summary = 'Show information useful for debugging.'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(DebugCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+        cmdoptions.add_target_python_options(cmd_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+        logger.warning(
+            "This command is only meant for debugging. "
+            "Do not use this with automation for parsing and getting these "
+            "details, since the output and options of this command may "
+            "change without notice."
+        )
+        show_value('pip version', get_pip_version())
+        show_value('sys.version', sys.version)
+        show_value('sys.executable', sys.executable)
+        show_value('sys.getdefaultencoding', sys.getdefaultencoding())
+        show_value('sys.getfilesystemencoding', sys.getfilesystemencoding())
+        show_value(
+            'locale.getpreferredencoding', locale.getpreferredencoding(),
+        )
+        show_value('sys.platform', sys.platform)
+        show_sys_implementation()
+
+        show_tags(options)
+
+        return SUCCESS
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/download.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/download.py
new file mode 100644
index 00000000..5642b561
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/download.py
@@ -0,0 +1,168 @@
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import RequirementCommand
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.legacy_resolve import Resolver
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req import RequirementSet
+from pip._internal.req.req_tracker import RequirementTracker
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.misc import ensure_dir, normalize_path
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+class DownloadCommand(RequirementCommand):
+    """
+    Download packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports downloading from "requirements files", which provide
+    an easy way to specify a whole environment to be downloaded.
+    """
+    name = 'download'
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] <vcs project url> ...
+      %prog [options] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    summary = 'Download packages.'
+
+    def __init__(self, *args, **kw):
+        super(DownloadCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(cmdoptions.constraints())
+        cmd_opts.add_option(cmdoptions.requirements())
+        cmd_opts.add_option(cmdoptions.build_dir())
+        cmd_opts.add_option(cmdoptions.no_deps())
+        cmd_opts.add_option(cmdoptions.global_options())
+        cmd_opts.add_option(cmdoptions.no_binary())
+        cmd_opts.add_option(cmdoptions.only_binary())
+        cmd_opts.add_option(cmdoptions.prefer_binary())
+        cmd_opts.add_option(cmdoptions.src())
+        cmd_opts.add_option(cmdoptions.pre())
+        cmd_opts.add_option(cmdoptions.no_clean())
+        cmd_opts.add_option(cmdoptions.require_hashes())
+        cmd_opts.add_option(cmdoptions.progress_bar())
+        cmd_opts.add_option(cmdoptions.no_build_isolation())
+        cmd_opts.add_option(cmdoptions.use_pep517())
+        cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        cmd_opts.add_option(
+            '-d', '--dest', '--destination-dir', '--destination-directory',
+            dest='download_dir',
+            metavar='dir',
+            default=os.curdir,
+            help=("Download packages into <dir>."),
+        )
+
+        cmdoptions.add_target_python_options(cmd_opts)
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        options.ignore_installed = True
+        # editable doesn't really make sense for `pip download`, but the bowels
+        # of the RequirementSet code require that property.
+        options.editables = []
+
+        cmdoptions.check_dist_restriction(options)
+
+        options.src_dir = os.path.abspath(options.src_dir)
+        options.download_dir = normalize_path(options.download_dir)
+
+        ensure_dir(options.download_dir)
+
+        with self._build_session(options) as session:
+            target_python = make_target_python(options)
+            finder = self._build_package_finder(
+                options=options,
+                session=session,
+                target_python=target_python,
+            )
+            build_delete = (not (options.no_clean or options.build_dir))
+            if options.cache_dir and not check_path_owner(options.cache_dir):
+                logger.warning(
+                    "The directory '%s' or its parent directory is not owned "
+                    "by the current user and caching wheels has been "
+                    "disabled. check the permissions and owner of that "
+                    "directory. If executing pip with sudo, you may want "
+                    "sudo's -H flag.",
+                    options.cache_dir,
+                )
+                options.cache_dir = None
+
+            with RequirementTracker() as req_tracker, TempDirectory(
+                options.build_dir, delete=build_delete, kind="download"
+            ) as directory:
+
+                requirement_set = RequirementSet(
+                    require_hashes=options.require_hashes,
+                )
+                self.populate_requirement_set(
+                    requirement_set,
+                    args,
+                    options,
+                    finder,
+                    session,
+                    self.name,
+                    None
+                )
+
+                preparer = RequirementPreparer(
+                    build_dir=directory.path,
+                    src_dir=options.src_dir,
+                    download_dir=options.download_dir,
+                    wheel_download_dir=None,
+                    progress_bar=options.progress_bar,
+                    build_isolation=options.build_isolation,
+                    req_tracker=req_tracker,
+                )
+
+                resolver = Resolver(
+                    preparer=preparer,
+                    finder=finder,
+                    session=session,
+                    wheel_cache=None,
+                    use_user_site=False,
+                    upgrade_strategy="to-satisfy-only",
+                    force_reinstall=False,
+                    ignore_dependencies=options.ignore_dependencies,
+                    py_version_info=options.python_version,
+                    ignore_requires_python=False,
+                    ignore_installed=True,
+                    isolated=options.isolated_mode,
+                )
+                resolver.resolve(requirement_set)
+
+                downloaded = ' '.join([
+                    req.name for req in requirement_set.successfully_downloaded
+                ])
+                if downloaded:
+                    logger.info('Successfully downloaded %s', downloaded)
+
+                # Clean up
+                if not options.no_clean:
+                    requirement_set.cleanup_files()
+
+        return requirement_set
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/freeze.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/freeze.py
new file mode 100644
index 00000000..9fc5b046
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/freeze.py
@@ -0,0 +1,101 @@
+from __future__ import absolute_import
+
+import sys
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.models.format_control import FormatControl
+from pip._internal.operations.freeze import freeze
+from pip._internal.utils.compat import stdlib_pkgs
+
+DEV_PKGS = {'pip', 'setuptools', 'distribute', 'wheel'}
+
+
+class FreezeCommand(Command):
+    """
+    Output installed packages in requirements format.
+
+    packages are listed in a case-insensitive sorted order.
+    """
+    name = 'freeze'
+    usage = """
+      %prog [options]"""
+    summary = 'Output installed packages in requirements format.'
+    log_streams = ("ext://sys.stderr", "ext://sys.stderr")
+
+    def __init__(self, *args, **kw):
+        super(FreezeCommand, self).__init__(*args, **kw)
+
+        self.cmd_opts.add_option(
+            '-r', '--requirement',
+            dest='requirements',
+            action='append',
+            default=[],
+            metavar='file',
+            help="Use the order in the given requirements file and its "
+                 "comments when generating output. This option can be "
+                 "used multiple times.")
+        self.cmd_opts.add_option(
+            '-f', '--find-links',
+            dest='find_links',
+            action='append',
+            default=[],
+            metavar='URL',
+            help='URL for finding packages, which will be added to the '
+                 'output.')
+        self.cmd_opts.add_option(
+            '-l', '--local',
+            dest='local',
+            action='store_true',
+            default=False,
+            help='If in a virtualenv that has global access, do not output '
+                 'globally-installed packages.')
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user',
+            action='store_true',
+            default=False,
+            help='Only output packages installed in user-site.')
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            '--all',
+            dest='freeze_all',
+            action='store_true',
+            help='Do not skip these packages in the output:'
+                 ' %s' % ', '.join(DEV_PKGS))
+        self.cmd_opts.add_option(
+            '--exclude-editable',
+            dest='exclude_editable',
+            action='store_true',
+            help='Exclude editable package from output.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        format_control = FormatControl(set(), set())
+        wheel_cache = WheelCache(options.cache_dir, format_control)
+        skip = set(stdlib_pkgs)
+        if not options.freeze_all:
+            skip.update(DEV_PKGS)
+
+        cmdoptions.check_list_path_option(options)
+
+        freeze_kwargs = dict(
+            requirement=options.requirements,
+            find_links=options.find_links,
+            local_only=options.local,
+            user_only=options.user,
+            paths=options.path,
+            skip_regex=options.skip_requirements_regex,
+            isolated=options.isolated_mode,
+            wheel_cache=wheel_cache,
+            skip=skip,
+            exclude_editable=options.exclude_editable,
+        )
+
+        try:
+            for line in freeze(**freeze_kwargs):
+                sys.stdout.write(line + '\n')
+        finally:
+            wheel_cache.cleanup()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/hash.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/hash.py
new file mode 100644
index 00000000..423440e9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/hash.py
@@ -0,0 +1,57 @@
+from __future__ import absolute_import
+
+import hashlib
+import logging
+import sys
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR
+from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
+from pip._internal.utils.misc import read_chunks
+
+logger = logging.getLogger(__name__)
+
+
+class HashCommand(Command):
+    """
+    Compute a hash of a local package archive.
+
+    These can be used with --hash in a requirements file to do repeatable
+    installs.
+
+    """
+    name = 'hash'
+    usage = '%prog [options] <file> ...'
+    summary = 'Compute hashes of package archives.'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(HashCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-a', '--algorithm',
+            dest='algorithm',
+            choices=STRONG_HASHES,
+            action='store',
+            default=FAVORITE_HASH,
+            help='The hash algorithm to use: one of %s' %
+                 ', '.join(STRONG_HASHES))
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        if not args:
+            self.parser.print_usage(sys.stderr)
+            return ERROR
+
+        algorithm = options.algorithm
+        for path in args:
+            logger.info('%s:\n--hash=%s:%s',
+                        path, algorithm, _hash_of_file(path, algorithm))
+
+
+def _hash_of_file(path, algorithm):
+    """Return the hash digest of a file."""
+    with open(path, 'rb') as archive:
+        hash = hashlib.new(algorithm)
+        for chunk in read_chunks(archive):
+            hash.update(chunk)
+    return hash.hexdigest()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/help.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/help.py
new file mode 100644
index 00000000..49a81cbb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/help.py
@@ -0,0 +1,37 @@
+from __future__ import absolute_import
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+
+
+class HelpCommand(Command):
+    """Show help for commands"""
+    name = 'help'
+    usage = """
+      %prog <command>"""
+    summary = 'Show help for commands.'
+    ignore_require_venv = True
+
+    def run(self, options, args):
+        from pip._internal.commands import commands_dict, get_similar_commands
+
+        try:
+            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            cmd_name = args[0]  # the command we need help for
+        except IndexError:
+            return SUCCESS
+
+        if cmd_name not in commands_dict:
+            guess = get_similar_commands(cmd_name)
+
+            msg = ['unknown command "%s"' % cmd_name]
+            if guess:
+                msg.append('maybe you meant "%s"' % guess)
+
+            raise CommandError(' - '.join(msg))
+
+        command = commands_dict[cmd_name]()
+        command.parser.print_help()
+
+        return SUCCESS
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/install.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/install.py
new file mode 100644
index 00000000..ebeceacf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/install.py
@@ -0,0 +1,580 @@
+from __future__ import absolute_import
+
+import errno
+import logging
+import operator
+import os
+import shutil
+from optparse import SUPPRESS_HELP
+
+from pip._vendor import pkg_resources
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import RequirementCommand
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.status_codes import ERROR
+from pip._internal.exceptions import (
+    CommandError, InstallationError, PreviousBuildDirError,
+)
+from pip._internal.legacy_resolve import Resolver
+from pip._internal.locations import distutils_scheme
+from pip._internal.operations.check import check_install_conflicts
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req import RequirementSet, install_given_reqs
+from pip._internal.req.req_tracker import RequirementTracker
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.misc import (
+    ensure_dir, get_installed_version,
+    protect_pip_from_modification_on_windows,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.virtualenv import virtualenv_no_global
+from pip._internal.wheel import WheelBuilder
+
+logger = logging.getLogger(__name__)
+
+
+def is_wheel_installed():
+    """
+    Return whether the wheel package is installed.
+    """
+    try:
+        import wheel  # noqa: F401
+    except ImportError:
+        return False
+
+    return True
+
+
+def build_wheels(builder, pep517_requirements, legacy_requirements, session):
+    """
+    Build wheels for requirements, depending on whether wheel is installed.
+    """
+    # We don't build wheels for legacy requirements if wheel is not installed.
+    should_build_legacy = is_wheel_installed()
+
+    # Always build PEP 517 requirements
+    build_failures = builder.build(
+        pep517_requirements,
+        session=session, autobuilding=True
+    )
+
+    if should_build_legacy:
+        # We don't care about failures building legacy
+        # requirements, as we'll fall through to a direct
+        # install for those.
+        builder.build(
+            legacy_requirements,
+            session=session, autobuilding=True
+        )
+
+    return build_failures
+
+
+class InstallCommand(RequirementCommand):
+    """
+    Install packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports installing from "requirements files," which provide
+    an easy way to specify a whole environment to be installed.
+    """
+    name = 'install'
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    summary = 'Install packages.'
+
+    def __init__(self, *args, **kw):
+        super(InstallCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(cmdoptions.requirements())
+        cmd_opts.add_option(cmdoptions.constraints())
+        cmd_opts.add_option(cmdoptions.no_deps())
+        cmd_opts.add_option(cmdoptions.pre())
+
+        cmd_opts.add_option(cmdoptions.editable())
+        cmd_opts.add_option(
+            '-t', '--target',
+            dest='target_dir',
+            metavar='dir',
+            default=None,
+            help='Install packages into <dir>. '
+                 'By default this will not replace existing files/folders in '
+                 '<dir>. Use --upgrade to replace existing packages in <dir> '
+                 'with new versions.'
+        )
+        cmdoptions.add_target_python_options(cmd_opts)
+
+        cmd_opts.add_option(
+            '--user',
+            dest='use_user_site',
+            action='store_true',
+            help="Install to the Python user install directory for your "
+                 "platform. Typically ~/.local/, or %APPDATA%\\Python on "
+                 "Windows. (See the Python documentation for site.USER_BASE "
+                 "for full details.)")
+        cmd_opts.add_option(
+            '--no-user',
+            dest='use_user_site',
+            action='store_false',
+            help=SUPPRESS_HELP)
+        cmd_opts.add_option(
+            '--root',
+            dest='root_path',
+            metavar='dir',
+            default=None,
+            help="Install everything relative to this alternate root "
+                 "directory.")
+        cmd_opts.add_option(
+            '--prefix',
+            dest='prefix_path',
+            metavar='dir',
+            default=None,
+            help="Installation prefix where lib, bin and other top-level "
+                 "folders are placed")
+
+        cmd_opts.add_option(cmdoptions.build_dir())
+
+        cmd_opts.add_option(cmdoptions.src())
+
+        cmd_opts.add_option(
+            '-U', '--upgrade',
+            dest='upgrade',
+            action='store_true',
+            help='Upgrade all specified packages to the newest available '
+                 'version. The handling of dependencies depends on the '
+                 'upgrade-strategy used.'
+        )
+
+        cmd_opts.add_option(
+            '--upgrade-strategy',
+            dest='upgrade_strategy',
+            default='only-if-needed',
+            choices=['only-if-needed', 'eager'],
+            help='Determines how dependency upgrading should be handled '
+                 '[default: %default]. '
+                 '"eager" - dependencies are upgraded regardless of '
+                 'whether the currently installed version satisfies the '
+                 'requirements of the upgraded package(s). '
+                 '"only-if-needed" -  are upgraded only when they do not '
+                 'satisfy the requirements of the upgraded package(s).'
+        )
+
+        cmd_opts.add_option(
+            '--force-reinstall',
+            dest='force_reinstall',
+            action='store_true',
+            help='Reinstall all packages even if they are already '
+                 'up-to-date.')
+
+        cmd_opts.add_option(
+            '-I', '--ignore-installed',
+            dest='ignore_installed',
+            action='store_true',
+            help='Ignore the installed packages (reinstalling instead).')
+
+        cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        cmd_opts.add_option(cmdoptions.no_build_isolation())
+        cmd_opts.add_option(cmdoptions.use_pep517())
+        cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        cmd_opts.add_option(cmdoptions.install_options())
+        cmd_opts.add_option(cmdoptions.global_options())
+
+        cmd_opts.add_option(
+            "--compile",
+            action="store_true",
+            dest="compile",
+            default=True,
+            help="Compile Python source files to bytecode",
+        )
+
+        cmd_opts.add_option(
+            "--no-compile",
+            action="store_false",
+            dest="compile",
+            help="Do not compile Python source files to bytecode",
+        )
+
+        cmd_opts.add_option(
+            "--no-warn-script-location",
+            action="store_false",
+            dest="warn_script_location",
+            default=True,
+            help="Do not warn when installing scripts outside PATH",
+        )
+        cmd_opts.add_option(
+            "--no-warn-conflicts",
+            action="store_false",
+            dest="warn_about_conflicts",
+            default=True,
+            help="Do not warn about broken dependencies",
+        )
+
+        cmd_opts.add_option(cmdoptions.no_binary())
+        cmd_opts.add_option(cmdoptions.only_binary())
+        cmd_opts.add_option(cmdoptions.prefer_binary())
+        cmd_opts.add_option(cmdoptions.no_clean())
+        cmd_opts.add_option(cmdoptions.require_hashes())
+        cmd_opts.add_option(cmdoptions.progress_bar())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        cmdoptions.check_install_build_global(options)
+        upgrade_strategy = "to-satisfy-only"
+        if options.upgrade:
+            upgrade_strategy = options.upgrade_strategy
+
+        if options.build_dir:
+            options.build_dir = os.path.abspath(options.build_dir)
+
+        cmdoptions.check_dist_restriction(options, check_target=True)
+
+        options.src_dir = os.path.abspath(options.src_dir)
+        install_options = options.install_options or []
+        if options.use_user_site:
+            if options.prefix_path:
+                raise CommandError(
+                    "Can not combine '--user' and '--prefix' as they imply "
+                    "different installation locations"
+                )
+            if virtualenv_no_global():
+                raise InstallationError(
+                    "Can not perform a '--user' install. User site-packages "
+                    "are not visible in this virtualenv."
+                )
+            install_options.append('--user')
+            install_options.append('--prefix=')
+
+        target_temp_dir = TempDirectory(kind="target")
+        if options.target_dir:
+            options.ignore_installed = True
+            options.target_dir = os.path.abspath(options.target_dir)
+            if (os.path.exists(options.target_dir) and not
+                    os.path.isdir(options.target_dir)):
+                raise CommandError(
+                    "Target path exists but is not a directory, will not "
+                    "continue."
+                )
+
+            # Create a target directory for using with the target option
+            target_temp_dir.create()
+            install_options.append('--home=' + target_temp_dir.path)
+
+        global_options = options.global_options or []
+
+        with self._build_session(options) as session:
+            target_python = make_target_python(options)
+            finder = self._build_package_finder(
+                options=options,
+                session=session,
+                target_python=target_python,
+                ignore_requires_python=options.ignore_requires_python,
+            )
+            build_delete = (not (options.no_clean or options.build_dir))
+            wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+            if options.cache_dir and not check_path_owner(options.cache_dir):
+                logger.warning(
+                    "The directory '%s' or its parent directory is not owned "
+                    "by the current user and caching wheels has been "
+                    "disabled. check the permissions and owner of that "
+                    "directory. If executing pip with sudo, you may want "
+                    "sudo's -H flag.",
+                    options.cache_dir,
+                )
+                options.cache_dir = None
+
+            with RequirementTracker() as req_tracker, TempDirectory(
+                options.build_dir, delete=build_delete, kind="install"
+            ) as directory:
+                requirement_set = RequirementSet(
+                    require_hashes=options.require_hashes,
+                    check_supported_wheels=not options.target_dir,
+                )
+
+                try:
+                    self.populate_requirement_set(
+                        requirement_set, args, options, finder, session,
+                        self.name, wheel_cache
+                    )
+                    preparer = RequirementPreparer(
+                        build_dir=directory.path,
+                        src_dir=options.src_dir,
+                        download_dir=None,
+                        wheel_download_dir=None,
+                        progress_bar=options.progress_bar,
+                        build_isolation=options.build_isolation,
+                        req_tracker=req_tracker,
+                    )
+
+                    resolver = Resolver(
+                        preparer=preparer,
+                        finder=finder,
+                        session=session,
+                        wheel_cache=wheel_cache,
+                        use_user_site=options.use_user_site,
+                        upgrade_strategy=upgrade_strategy,
+                        force_reinstall=options.force_reinstall,
+                        ignore_dependencies=options.ignore_dependencies,
+                        ignore_requires_python=options.ignore_requires_python,
+                        ignore_installed=options.ignore_installed,
+                        isolated=options.isolated_mode,
+                        use_pep517=options.use_pep517
+                    )
+                    resolver.resolve(requirement_set)
+
+                    protect_pip_from_modification_on_windows(
+                        modifying_pip=requirement_set.has_requirement("pip")
+                    )
+
+                    # Consider legacy and PEP517-using requirements separately
+                    legacy_requirements = []
+                    pep517_requirements = []
+                    for req in requirement_set.requirements.values():
+                        if req.use_pep517:
+                            pep517_requirements.append(req)
+                        else:
+                            legacy_requirements.append(req)
+
+                    wheel_builder = WheelBuilder(
+                        finder, preparer, wheel_cache,
+                        build_options=[], global_options=[],
+                    )
+
+                    build_failures = build_wheels(
+                        builder=wheel_builder,
+                        pep517_requirements=pep517_requirements,
+                        legacy_requirements=legacy_requirements,
+                        session=session,
+                    )
+
+                    # If we're using PEP 517, we cannot do a direct install
+                    # so we fail here.
+                    if build_failures:
+                        raise InstallationError(
+                            "Could not build wheels for {} which use"
+                            " PEP 517 and cannot be installed directly".format(
+                                ", ".join(r.name for r in build_failures)))
+
+                    to_install = resolver.get_installation_order(
+                        requirement_set
+                    )
+
+                    # Consistency Checking of the package set we're installing.
+                    should_warn_about_conflicts = (
+                        not options.ignore_dependencies and
+                        options.warn_about_conflicts
+                    )
+                    if should_warn_about_conflicts:
+                        self._warn_about_conflicts(to_install)
+
+                    # Don't warn about script install locations if
+                    # --target has been specified
+                    warn_script_location = options.warn_script_location
+                    if options.target_dir:
+                        warn_script_location = False
+
+                    installed = install_given_reqs(
+                        to_install,
+                        install_options,
+                        global_options,
+                        root=options.root_path,
+                        home=target_temp_dir.path,
+                        prefix=options.prefix_path,
+                        pycompile=options.compile,
+                        warn_script_location=warn_script_location,
+                        use_user_site=options.use_user_site,
+                    )
+
+                    lib_locations = get_lib_location_guesses(
+                        user=options.use_user_site,
+                        home=target_temp_dir.path,
+                        root=options.root_path,
+                        prefix=options.prefix_path,
+                        isolated=options.isolated_mode,
+                    )
+                    working_set = pkg_resources.WorkingSet(lib_locations)
+
+                    reqs = sorted(installed, key=operator.attrgetter('name'))
+                    items = []
+                    for req in reqs:
+                        item = req.name
+                        try:
+                            installed_version = get_installed_version(
+                                req.name, working_set=working_set
+                            )
+                            if installed_version:
+                                item += '-' + installed_version
+                        except Exception:
+                            pass
+                        items.append(item)
+                    installed = ' '.join(items)
+                    if installed:
+                        logger.info('Successfully installed %s', installed)
+                except EnvironmentError as error:
+                    show_traceback = (self.verbosity >= 1)
+
+                    message = create_env_error_message(
+                        error, show_traceback, options.use_user_site,
+                    )
+                    logger.error(message, exc_info=show_traceback)
+
+                    return ERROR
+                except PreviousBuildDirError:
+                    options.no_clean = True
+                    raise
+                finally:
+                    # Clean up
+                    if not options.no_clean:
+                        requirement_set.cleanup_files()
+                        wheel_cache.cleanup()
+
+        if options.target_dir:
+            self._handle_target_dir(
+                options.target_dir, target_temp_dir, options.upgrade
+            )
+        return requirement_set
+
+    def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
+        ensure_dir(target_dir)
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        lib_dir_list = []
+
+        with target_temp_dir:
+            # Checking both purelib and platlib directories for installed
+            # packages to be moved to target directory
+            scheme = distutils_scheme('', home=target_temp_dir.path)
+            purelib_dir = scheme['purelib']
+            platlib_dir = scheme['platlib']
+            data_dir = scheme['data']
+
+            if os.path.exists(purelib_dir):
+                lib_dir_list.append(purelib_dir)
+            if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
+                lib_dir_list.append(platlib_dir)
+            if os.path.exists(data_dir):
+                lib_dir_list.append(data_dir)
+
+            for lib_dir in lib_dir_list:
+                for item in os.listdir(lib_dir):
+                    if lib_dir == data_dir:
+                        ddir = os.path.join(data_dir, item)
+                        if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
+                            continue
+                    target_item_dir = os.path.join(target_dir, item)
+                    if os.path.exists(target_item_dir):
+                        if not upgrade:
+                            logger.warning(
+                                'Target directory %s already exists. Specify '
+                                '--upgrade to force replacement.',
+                                target_item_dir
+                            )
+                            continue
+                        if os.path.islink(target_item_dir):
+                            logger.warning(
+                                'Target directory %s already exists and is '
+                                'a link. Pip will not automatically replace '
+                                'links, please remove if replacement is '
+                                'desired.',
+                                target_item_dir
+                            )
+                            continue
+                        if os.path.isdir(target_item_dir):
+                            shutil.rmtree(target_item_dir)
+                        else:
+                            os.remove(target_item_dir)
+
+                    shutil.move(
+                        os.path.join(lib_dir, item),
+                        target_item_dir
+                    )
+
+    def _warn_about_conflicts(self, to_install):
+        try:
+            package_set, _dep_info = check_install_conflicts(to_install)
+        except Exception:
+            logger.error("Error checking for conflicts.", exc_info=True)
+            return
+        missing, conflicting = _dep_info
+
+        # NOTE: There is some duplication here from pip check
+        for project_name in missing:
+            version = package_set[project_name][0]
+            for dependency in missing[project_name]:
+                logger.critical(
+                    "%s %s requires %s, which is not installed.",
+                    project_name, version, dependency[1],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name][0]
+            for dep_name, dep_version, req in conflicting[project_name]:
+                logger.critical(
+                    "%s %s has requirement %s, but you'll have %s %s which is "
+                    "incompatible.",
+                    project_name, version, req, dep_name, dep_version,
+                )
+
+
+def get_lib_location_guesses(*args, **kwargs):
+    scheme = distutils_scheme('', *args, **kwargs)
+    return [scheme['purelib'], scheme['platlib']]
+
+
+def create_env_error_message(error, show_traceback, using_user_site):
+    """Format an error message for an EnvironmentError
+
+    It may occur anytime during the execution of the install command.
+    """
+    parts = []
+
+    # Mention the error if we are not going to show a traceback
+    parts.append("Could not install packages due to an EnvironmentError")
+    if not show_traceback:
+        parts.append(": ")
+        parts.append(str(error))
+    else:
+        parts.append(".")
+
+    # Spilt the error indication from a helper message (if any)
+    parts[-1] += "\n"
+
+    # Suggest useful actions to the user:
+    #  (1) using user site-packages or (2) verifying the permissions
+    if error.errno == errno.EACCES:
+        user_option_part = "Consider using the `--user` option"
+        permissions_part = "Check the permissions"
+
+        if not using_user_site:
+            parts.extend([
+                user_option_part, " or ",
+                permissions_part.lower(),
+            ])
+        else:
+            parts.append(permissions_part)
+        parts.append(".\n")
+
+    return "".join(parts).strip() + "\n"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/list.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/list.py
new file mode 100644
index 00000000..cf71b13e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/list.py
@@ -0,0 +1,311 @@
+from __future__ import absolute_import
+
+import json
+import logging
+
+from pip._vendor import six
+from pip._vendor.six.moves import zip_longest
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.cmdoptions import make_search_scope
+from pip._internal.exceptions import CommandError
+from pip._internal.index import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.utils.misc import (
+    dist_is_editable, get_installed_distributions,
+)
+from pip._internal.utils.packaging import get_installer
+
+logger = logging.getLogger(__name__)
+
+
+class ListCommand(Command):
+    """
+    List installed packages, including editables.
+
+    Packages are listed in a case-insensitive sorted order.
+    """
+    name = 'list'
+    usage = """
+      %prog [options]"""
+    summary = 'List installed packages.'
+
+    def __init__(self, *args, **kw):
+        super(ListCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(
+            '-o', '--outdated',
+            action='store_true',
+            default=False,
+            help='List outdated packages')
+        cmd_opts.add_option(
+            '-u', '--uptodate',
+            action='store_true',
+            default=False,
+            help='List uptodate packages')
+        cmd_opts.add_option(
+            '-e', '--editable',
+            action='store_true',
+            default=False,
+            help='List editable projects.')
+        cmd_opts.add_option(
+            '-l', '--local',
+            action='store_true',
+            default=False,
+            help=('If in a virtualenv that has global access, do not list '
+                  'globally-installed packages.'),
+        )
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user',
+            action='store_true',
+            default=False,
+            help='Only output packages installed in user-site.')
+        cmd_opts.add_option(cmdoptions.list_path())
+        cmd_opts.add_option(
+            '--pre',
+            action='store_true',
+            default=False,
+            help=("Include pre-release and development versions. By default, "
+                  "pip only finds stable versions."),
+        )
+
+        cmd_opts.add_option(
+            '--format',
+            action='store',
+            dest='list_format',
+            default="columns",
+            choices=('columns', 'freeze', 'json'),
+            help="Select the output format among: columns (default), freeze, "
+                 "or json",
+        )
+
+        cmd_opts.add_option(
+            '--not-required',
+            action='store_true',
+            dest='not_required',
+            help="List packages that are not dependencies of "
+                 "installed packages.",
+        )
+
+        cmd_opts.add_option(
+            '--exclude-editable',
+            action='store_false',
+            dest='include_editable',
+            help='Exclude editable package from output.',
+        )
+        cmd_opts.add_option(
+            '--include-editable',
+            action='store_true',
+            dest='include_editable',
+            help='Include editable package from output.',
+            default=True,
+        )
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group, self.parser
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def _build_package_finder(self, options, session):
+        """
+        Create a package finder appropriate to this list command.
+        """
+        search_scope = make_search_scope(options)
+
+        # Pass allow_yanked=False to ignore yanked versions.
+        selection_prefs = SelectionPreferences(
+            allow_yanked=False,
+            allow_all_prereleases=options.pre,
+        )
+
+        return PackageFinder.create(
+            search_scope=search_scope,
+            selection_prefs=selection_prefs,
+            trusted_hosts=options.trusted_hosts,
+            session=session,
+        )
+
+    def run(self, options, args):
+        if options.outdated and options.uptodate:
+            raise CommandError(
+                "Options --outdated and --uptodate cannot be combined.")
+
+        cmdoptions.check_list_path_option(options)
+
+        packages = get_installed_distributions(
+            local_only=options.local,
+            user_only=options.user,
+            editables_only=options.editable,
+            include_editables=options.include_editable,
+            paths=options.path,
+        )
+
+        # get_not_required must be called firstly in order to find and
+        # filter out all dependencies correctly. Otherwise a package
+        # can't be identified as requirement because some parent packages
+        # could be filtered out before.
+        if options.not_required:
+            packages = self.get_not_required(packages, options)
+
+        if options.outdated:
+            packages = self.get_outdated(packages, options)
+        elif options.uptodate:
+            packages = self.get_uptodate(packages, options)
+
+        self.output_package_listing(packages, options)
+
+    def get_outdated(self, packages, options):
+        return [
+            dist for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version > dist.parsed_version
+        ]
+
+    def get_uptodate(self, packages, options):
+        return [
+            dist for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version == dist.parsed_version
+        ]
+
+    def get_not_required(self, packages, options):
+        dep_keys = set()
+        for dist in packages:
+            dep_keys.update(requirement.key for requirement in dist.requires())
+        return {pkg for pkg in packages if pkg.key not in dep_keys}
+
+    def iter_packages_latest_infos(self, packages, options):
+        with self._build_session(options) as session:
+            finder = self._build_package_finder(options, session)
+
+            for dist in packages:
+                typ = 'unknown'
+                all_candidates = finder.find_all_candidates(dist.key)
+                if not options.pre:
+                    # Remove prereleases
+                    all_candidates = [candidate for candidate in all_candidates
+                                      if not candidate.version.is_prerelease]
+
+                evaluator = finder.make_candidate_evaluator(
+                    project_name=dist.project_name,
+                )
+                best_candidate = evaluator.get_best_candidate(all_candidates)
+                if best_candidate is None:
+                    continue
+
+                remote_version = best_candidate.version
+                if best_candidate.link.is_wheel:
+                    typ = 'wheel'
+                else:
+                    typ = 'sdist'
+                # This is dirty but makes the rest of the code much cleaner
+                dist.latest_version = remote_version
+                dist.latest_filetype = typ
+                yield dist
+
+    def output_package_listing(self, packages, options):
+        packages = sorted(
+            packages,
+            key=lambda dist: dist.project_name.lower(),
+        )
+        if options.list_format == 'columns' and packages:
+            data, header = format_for_columns(packages, options)
+            self.output_package_listing_columns(data, header)
+        elif options.list_format == 'freeze':
+            for dist in packages:
+                if options.verbose >= 1:
+                    logger.info("%s==%s (%s)", dist.project_name,
+                                dist.version, dist.location)
+                else:
+                    logger.info("%s==%s", dist.project_name, dist.version)
+        elif options.list_format == 'json':
+            logger.info(format_for_json(packages, options))
+
+    def output_package_listing_columns(self, data, header):
+        # insert the header first: we need to know the size of column names
+        if len(data) > 0:
+            data.insert(0, header)
+
+        pkg_strings, sizes = tabulate(data)
+
+        # Create and add a separator.
+        if len(data) > 0:
+            pkg_strings.insert(1, " ".join(map(lambda x: '-' * x, sizes)))
+
+        for val in pkg_strings:
+            logger.info(val)
+
+
+def tabulate(vals):
+    # From pfmoore on GitHub:
+    # https://github.com/pypa/pip/issues/3651#issuecomment-216932564
+    assert len(vals) > 0
+
+    sizes = [0] * max(len(x) for x in vals)
+    for row in vals:
+        sizes = [max(s, len(str(c))) for s, c in zip_longest(sizes, row)]
+
+    result = []
+    for row in vals:
+        display = " ".join([str(c).ljust(s) if c is not None else ''
+                            for s, c in zip_longest(sizes, row)])
+        result.append(display)
+
+    return result, sizes
+
+
+def format_for_columns(pkgs, options):
+    """
+    Convert the package data into something usable
+    by output_package_listing_columns.
+    """
+    running_outdated = options.outdated
+    # Adjust the header for the `pip list --outdated` case.
+    if running_outdated:
+        header = ["Package", "Version", "Latest", "Type"]
+    else:
+        header = ["Package", "Version"]
+
+    data = []
+    if options.verbose >= 1 or any(dist_is_editable(x) for x in pkgs):
+        header.append("Location")
+    if options.verbose >= 1:
+        header.append("Installer")
+
+    for proj in pkgs:
+        # if we're working on the 'outdated' list, separate out the
+        # latest_version and type
+        row = [proj.project_name, proj.version]
+
+        if running_outdated:
+            row.append(proj.latest_version)
+            row.append(proj.latest_filetype)
+
+        if options.verbose >= 1 or dist_is_editable(proj):
+            row.append(proj.location)
+        if options.verbose >= 1:
+            row.append(get_installer(proj))
+
+        data.append(row)
+
+    return data, header
+
+
+def format_for_json(packages, options):
+    data = []
+    for dist in packages:
+        info = {
+            'name': dist.project_name,
+            'version': six.text_type(dist.version),
+        }
+        if options.verbose >= 1:
+            info['location'] = dist.location
+            info['installer'] = get_installer(dist)
+        if options.outdated:
+            info['latest_version'] = six.text_type(dist.latest_version)
+            info['latest_filetype'] = dist.latest_filetype
+        data.append(info)
+    return json.dumps(data)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/search.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/search.py
new file mode 100644
index 00000000..58027112
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/search.py
@@ -0,0 +1,139 @@
+from __future__ import absolute_import
+
+import logging
+import sys
+import textwrap
+from collections import OrderedDict
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.version import parse as parse_version
+# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import
+from pip._vendor.six.moves import xmlrpc_client  # type: ignore
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import NO_MATCHES_FOUND, SUCCESS
+from pip._internal.download import PipXmlrpcTransport
+from pip._internal.exceptions import CommandError
+from pip._internal.models.index import PyPI
+from pip._internal.utils.compat import get_terminal_size
+from pip._internal.utils.logging import indent_log
+
+logger = logging.getLogger(__name__)
+
+
+class SearchCommand(Command):
+    """Search for PyPI packages whose name or summary contains <query>."""
+    name = 'search'
+    usage = """
+      %prog [options] <query>"""
+    summary = 'Search PyPI for packages.'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(SearchCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-i', '--index',
+            dest='index',
+            metavar='URL',
+            default=PyPI.pypi_url,
+            help='Base URL of Python Package Index (default %default)')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        if not args:
+            raise CommandError('Missing required argument (search query).')
+        query = args
+        pypi_hits = self.search(query, options)
+        hits = transform_hits(pypi_hits)
+
+        terminal_width = None
+        if sys.stdout.isatty():
+            terminal_width = get_terminal_size()[0]
+
+        print_results(hits, terminal_width=terminal_width)
+        if pypi_hits:
+            return SUCCESS
+        return NO_MATCHES_FOUND
+
+    def search(self, query, options):
+        index_url = options.index
+        with self._build_session(options) as session:
+            transport = PipXmlrpcTransport(index_url, session)
+            pypi = xmlrpc_client.ServerProxy(index_url, transport)
+            hits = pypi.search({'name': query, 'summary': query}, 'or')
+            return hits
+
+
+def transform_hits(hits):
+    """
+    The list from pypi is really a list of versions. We want a list of
+    packages with the list of versions stored inline. This converts the
+    list from pypi into one we can use.
+    """
+    packages = OrderedDict()
+    for hit in hits:
+        name = hit['name']
+        summary = hit['summary']
+        version = hit['version']
+
+        if name not in packages.keys():
+            packages[name] = {
+                'name': name,
+                'summary': summary,
+                'versions': [version],
+            }
+        else:
+            packages[name]['versions'].append(version)
+
+            # if this is the highest version, replace summary and score
+            if version == highest_version(packages[name]['versions']):
+                packages[name]['summary'] = summary
+
+    return list(packages.values())
+
+
+def print_results(hits, name_column_width=None, terminal_width=None):
+    if not hits:
+        return
+    if name_column_width is None:
+        name_column_width = max([
+            len(hit['name']) + len(highest_version(hit.get('versions', ['-'])))
+            for hit in hits
+        ]) + 4
+
+    installed_packages = [p.project_name for p in pkg_resources.working_set]
+    for hit in hits:
+        name = hit['name']
+        summary = hit['summary'] or ''
+        latest = highest_version(hit.get('versions', ['-']))
+        if terminal_width is not None:
+            target_width = terminal_width - name_column_width - 5
+            if target_width > 10:
+                # wrap and indent summary to fit terminal
+                summary = textwrap.wrap(summary, target_width)
+                summary = ('\n' + ' ' * (name_column_width + 3)).join(summary)
+
+        line = '%-*s - %s' % (name_column_width,
+                              '%s (%s)' % (name, latest), summary)
+        try:
+            logger.info(line)
+            if name in installed_packages:
+                dist = pkg_resources.get_distribution(name)
+                with indent_log():
+                    if dist.version == latest:
+                        logger.info('INSTALLED: %s (latest)', dist.version)
+                    else:
+                        logger.info('INSTALLED: %s', dist.version)
+                        if parse_version(latest).pre:
+                            logger.info('LATEST:    %s (pre-release; install'
+                                        ' with "pip install --pre")', latest)
+                        else:
+                            logger.info('LATEST:    %s', latest)
+        except UnicodeEncodeError:
+            pass
+
+
+def highest_version(versions):
+    return max(versions, key=parse_version)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/show.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/show.py
new file mode 100644
index 00000000..a18a9020
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/show.py
@@ -0,0 +1,168 @@
+from __future__ import absolute_import
+
+import logging
+import os
+from email.parser import FeedParser
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+
+logger = logging.getLogger(__name__)
+
+
+class ShowCommand(Command):
+    """
+    Show information about one or more installed packages.
+
+    The output is in RFC-compliant mail header format.
+    """
+    name = 'show'
+    usage = """
+      %prog [options] <package> ..."""
+    summary = 'Show information about installed packages.'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(ShowCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-f', '--files',
+            dest='files',
+            action='store_true',
+            default=False,
+            help='Show the full list of installed files for each package.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        if not args:
+            logger.warning('ERROR: Please provide a package name or names.')
+            return ERROR
+        query = args
+
+        results = search_packages_info(query)
+        if not print_results(
+                results, list_files=options.files, verbose=options.verbose):
+            return ERROR
+        return SUCCESS
+
+
+def search_packages_info(query):
+    """
+    Gather details from installed distributions. Print distribution name,
+    version, location, and installed files. Installed files requires a
+    pip generated 'installed-files.txt' in the distributions '.egg-info'
+    directory.
+    """
+    installed = {}
+    for p in pkg_resources.working_set:
+        installed[canonicalize_name(p.project_name)] = p
+
+    query_names = [canonicalize_name(name) for name in query]
+
+    for dist in [installed[pkg] for pkg in query_names if pkg in installed]:
+        package = {
+            'name': dist.project_name,
+            'version': dist.version,
+            'location': dist.location,
+            'requires': [dep.project_name for dep in dist.requires()],
+        }
+        file_list = None
+        metadata = None
+        if isinstance(dist, pkg_resources.DistInfoDistribution):
+            # RECORDs should be part of .dist-info metadatas
+            if dist.has_metadata('RECORD'):
+                lines = dist.get_metadata_lines('RECORD')
+                paths = [l.split(',')[0] for l in lines]
+                paths = [os.path.join(dist.location, p) for p in paths]
+                file_list = [os.path.relpath(p, dist.location) for p in paths]
+
+            if dist.has_metadata('METADATA'):
+                metadata = dist.get_metadata('METADATA')
+        else:
+            # Otherwise use pip's log for .egg-info's
+            if dist.has_metadata('installed-files.txt'):
+                paths = dist.get_metadata_lines('installed-files.txt')
+                paths = [os.path.join(dist.egg_info, p) for p in paths]
+                file_list = [os.path.relpath(p, dist.location) for p in paths]
+
+            if dist.has_metadata('PKG-INFO'):
+                metadata = dist.get_metadata('PKG-INFO')
+
+        if dist.has_metadata('entry_points.txt'):
+            entry_points = dist.get_metadata_lines('entry_points.txt')
+            package['entry_points'] = entry_points
+
+        if dist.has_metadata('INSTALLER'):
+            for line in dist.get_metadata_lines('INSTALLER'):
+                if line.strip():
+                    package['installer'] = line.strip()
+                    break
+
+        # @todo: Should pkg_resources.Distribution have a
+        # `get_pkg_info` method?
+        feed_parser = FeedParser()
+        feed_parser.feed(metadata)
+        pkg_info_dict = feed_parser.close()
+        for key in ('metadata-version', 'summary',
+                    'home-page', 'author', 'author-email', 'license'):
+            package[key] = pkg_info_dict.get(key)
+
+        # It looks like FeedParser cannot deal with repeated headers
+        classifiers = []
+        for line in metadata.splitlines():
+            if line.startswith('Classifier: '):
+                classifiers.append(line[len('Classifier: '):])
+        package['classifiers'] = classifiers
+
+        if file_list:
+            package['files'] = sorted(file_list)
+        yield package
+
+
+def print_results(distributions, list_files=False, verbose=False):
+    """
+    Print the informations from installed distributions found.
+    """
+    results_printed = False
+    for i, dist in enumerate(distributions):
+        results_printed = True
+        if i > 0:
+            logger.info("---")
+
+        name = dist.get('name', '')
+        required_by = [
+            pkg.project_name for pkg in pkg_resources.working_set
+            if name in [required.name for required in pkg.requires()]
+        ]
+
+        logger.info("Name: %s", name)
+        logger.info("Version: %s", dist.get('version', ''))
+        logger.info("Summary: %s", dist.get('summary', ''))
+        logger.info("Home-page: %s", dist.get('home-page', ''))
+        logger.info("Author: %s", dist.get('author', ''))
+        logger.info("Author-email: %s", dist.get('author-email', ''))
+        logger.info("License: %s", dist.get('license', ''))
+        logger.info("Location: %s", dist.get('location', ''))
+        logger.info("Requires: %s", ', '.join(dist.get('requires', [])))
+        logger.info("Required-by: %s", ', '.join(required_by))
+
+        if verbose:
+            logger.info("Metadata-Version: %s",
+                        dist.get('metadata-version', ''))
+            logger.info("Installer: %s", dist.get('installer', ''))
+            logger.info("Classifiers:")
+            for classifier in dist.get('classifiers', []):
+                logger.info("  %s", classifier)
+            logger.info("Entry-points:")
+            for entry in dist.get('entry_points', []):
+                logger.info("  %s", entry.strip())
+        if list_files:
+            logger.info("Files:")
+            for line in dist.get('files', []):
+                logger.info("  %s", line.strip())
+            if "files" not in dist:
+                logger.info("Cannot locate installed-files.txt")
+    return results_printed
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/uninstall.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/uninstall.py
new file mode 100644
index 00000000..0cd6f54b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/uninstall.py
@@ -0,0 +1,78 @@
+from __future__ import absolute_import
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.base_command import Command
+from pip._internal.exceptions import InstallationError
+from pip._internal.req import parse_requirements
+from pip._internal.req.constructors import install_req_from_line
+from pip._internal.utils.misc import protect_pip_from_modification_on_windows
+
+
+class UninstallCommand(Command):
+    """
+    Uninstall packages.
+
+    pip is able to uninstall most installed packages. Known exceptions are:
+
+    - Pure distutils packages installed with ``python setup.py install``, which
+      leave behind no metadata to determine what files were installed.
+    - Script wrappers installed by ``python setup.py develop``.
+    """
+    name = 'uninstall'
+    usage = """
+      %prog [options] <package> ...
+      %prog [options] -r <requirements file> ..."""
+    summary = 'Uninstall packages.'
+
+    def __init__(self, *args, **kw):
+        super(UninstallCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-r', '--requirement',
+            dest='requirements',
+            action='append',
+            default=[],
+            metavar='file',
+            help='Uninstall all the packages listed in the given requirements '
+                 'file.  This option can be used multiple times.',
+        )
+        self.cmd_opts.add_option(
+            '-y', '--yes',
+            dest='yes',
+            action='store_true',
+            help="Don't ask for confirmation of uninstall deletions.")
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        with self._build_session(options) as session:
+            reqs_to_uninstall = {}
+            for name in args:
+                req = install_req_from_line(
+                    name, isolated=options.isolated_mode,
+                )
+                if req.name:
+                    reqs_to_uninstall[canonicalize_name(req.name)] = req
+            for filename in options.requirements:
+                for req in parse_requirements(
+                        filename,
+                        options=options,
+                        session=session):
+                    if req.name:
+                        reqs_to_uninstall[canonicalize_name(req.name)] = req
+            if not reqs_to_uninstall:
+                raise InstallationError(
+                    'You must give at least one requirement to %(name)s (see '
+                    '"pip help %(name)s")' % dict(name=self.name)
+                )
+
+            protect_pip_from_modification_on_windows(
+                modifying_pip="pip" in reqs_to_uninstall
+            )
+
+            for req in reqs_to_uninstall.values():
+                uninstall_pathset = req.uninstall(
+                    auto_confirm=options.yes, verbose=self.verbosity > 0,
+                )
+                if uninstall_pathset:
+                    uninstall_pathset.commit()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/wheel.py
new file mode 100644
index 00000000..97f3b148
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/commands/wheel.py
@@ -0,0 +1,181 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import RequirementCommand
+from pip._internal.exceptions import CommandError, PreviousBuildDirError
+from pip._internal.legacy_resolve import Resolver
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req import RequirementSet
+from pip._internal.req.req_tracker import RequirementTracker
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.wheel import WheelBuilder
+
+logger = logging.getLogger(__name__)
+
+
+class WheelCommand(RequirementCommand):
+    """
+    Build Wheel archives for your requirements and dependencies.
+
+    Wheel is a built-package format, and offers the advantage of not
+    recompiling your software during every install. For more details, see the
+    wheel docs: https://wheel.readthedocs.io/en/latest/
+
+    Requirements: setuptools>=0.8, and wheel.
+
+    'pip wheel' uses the bdist_wheel setuptools extension from the wheel
+    package to build individual wheels.
+
+    """
+
+    name = 'wheel'
+    usage = """
+      %prog [options] <requirement specifier> ...
+      %prog [options] -r <requirements file> ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    summary = 'Build wheels from your requirements.'
+
+    def __init__(self, *args, **kw):
+        super(WheelCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(
+            '-w', '--wheel-dir',
+            dest='wheel_dir',
+            metavar='dir',
+            default=os.curdir,
+            help=("Build wheels into <dir>, where the default is the "
+                  "current working directory."),
+        )
+        cmd_opts.add_option(cmdoptions.no_binary())
+        cmd_opts.add_option(cmdoptions.only_binary())
+        cmd_opts.add_option(cmdoptions.prefer_binary())
+        cmd_opts.add_option(
+            '--build-option',
+            dest='build_options',
+            metavar='options',
+            action='append',
+            help="Extra arguments to be supplied to 'setup.py bdist_wheel'.",
+        )
+        cmd_opts.add_option(cmdoptions.no_build_isolation())
+        cmd_opts.add_option(cmdoptions.use_pep517())
+        cmd_opts.add_option(cmdoptions.no_use_pep517())
+        cmd_opts.add_option(cmdoptions.constraints())
+        cmd_opts.add_option(cmdoptions.editable())
+        cmd_opts.add_option(cmdoptions.requirements())
+        cmd_opts.add_option(cmdoptions.src())
+        cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        cmd_opts.add_option(cmdoptions.no_deps())
+        cmd_opts.add_option(cmdoptions.build_dir())
+        cmd_opts.add_option(cmdoptions.progress_bar())
+
+        cmd_opts.add_option(
+            '--global-option',
+            dest='global_options',
+            action='append',
+            metavar='options',
+            help="Extra global options to be supplied to the setup.py "
+            "call before the 'bdist_wheel' command.")
+
+        cmd_opts.add_option(
+            '--pre',
+            action='store_true',
+            default=False,
+            help=("Include pre-release and development versions. By default, "
+                  "pip only finds stable versions."),
+        )
+
+        cmd_opts.add_option(cmdoptions.no_clean())
+        cmd_opts.add_option(cmdoptions.require_hashes())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        cmdoptions.check_install_build_global(options)
+
+        if options.build_dir:
+            options.build_dir = os.path.abspath(options.build_dir)
+
+        options.src_dir = os.path.abspath(options.src_dir)
+
+        with self._build_session(options) as session:
+            finder = self._build_package_finder(options, session)
+            build_delete = (not (options.no_clean or options.build_dir))
+            wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+            with RequirementTracker() as req_tracker, TempDirectory(
+                options.build_dir, delete=build_delete, kind="wheel"
+            ) as directory:
+
+                requirement_set = RequirementSet(
+                    require_hashes=options.require_hashes,
+                )
+
+                try:
+                    self.populate_requirement_set(
+                        requirement_set, args, options, finder, session,
+                        self.name, wheel_cache
+                    )
+
+                    preparer = RequirementPreparer(
+                        build_dir=directory.path,
+                        src_dir=options.src_dir,
+                        download_dir=None,
+                        wheel_download_dir=options.wheel_dir,
+                        progress_bar=options.progress_bar,
+                        build_isolation=options.build_isolation,
+                        req_tracker=req_tracker,
+                    )
+
+                    resolver = Resolver(
+                        preparer=preparer,
+                        finder=finder,
+                        session=session,
+                        wheel_cache=wheel_cache,
+                        use_user_site=False,
+                        upgrade_strategy="to-satisfy-only",
+                        force_reinstall=False,
+                        ignore_dependencies=options.ignore_dependencies,
+                        ignore_requires_python=options.ignore_requires_python,
+                        ignore_installed=True,
+                        isolated=options.isolated_mode,
+                        use_pep517=options.use_pep517
+                    )
+                    resolver.resolve(requirement_set)
+
+                    # build wheels
+                    wb = WheelBuilder(
+                        finder, preparer, wheel_cache,
+                        build_options=options.build_options or [],
+                        global_options=options.global_options or [],
+                        no_clean=options.no_clean,
+                    )
+                    build_failures = wb.build(
+                        requirement_set.requirements.values(), session=session,
+                    )
+                    if len(build_failures) != 0:
+                        raise CommandError(
+                            "Failed to build one or more wheels"
+                        )
+                except PreviousBuildDirError:
+                    options.no_clean = True
+                    raise
+                finally:
+                    if not options.no_clean:
+                        requirement_set.cleanup_files()
+                        wheel_cache.cleanup()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/configuration.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/configuration.py
new file mode 100644
index 00000000..437e92ee
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/configuration.py
@@ -0,0 +1,417 @@
+"""Configuration management setup
+
+Some terminology:
+- name
+  As written in config files.
+- value
+  Value associated with a name
+- key
+  Name combined with it's section (section.name)
+- variant
+  A single word describing where the configuration key-value pair came from
+"""
+
+import locale
+import logging
+import os
+import sys
+
+from pip._vendor.six.moves import configparser
+
+from pip._internal.exceptions import (
+    ConfigurationError, ConfigurationFileCouldNotBeLoaded,
+)
+from pip._internal.utils import appdirs
+from pip._internal.utils.compat import WINDOWS, expanduser
+from pip._internal.utils.misc import ensure_dir, enum
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, List, NewType, Optional, Tuple
+    )
+
+    RawConfigParser = configparser.RawConfigParser  # Shorthand
+    Kind = NewType("Kind", str)
+
+logger = logging.getLogger(__name__)
+
+
+# NOTE: Maybe use the optionx attribute to normalize keynames.
+def _normalize_name(name):
+    # type: (str) -> str
+    """Make a name consistent regardless of source (environment or file)
+    """
+    name = name.lower().replace('_', '-')
+    if name.startswith('--'):
+        name = name[2:]  # only prefer long opts
+    return name
+
+
+def _disassemble_key(name):
+    # type: (str) -> List[str]
+    if "." not in name:
+        error_message = (
+            "Key does not contain dot separated section and key. "
+            "Perhaps you wanted to use 'global.{}' instead?"
+        ).format(name)
+        raise ConfigurationError(error_message)
+    return name.split(".", 1)
+
+
+# The kinds of configurations there are.
+kinds = enum(
+    USER="user",        # User Specific
+    GLOBAL="global",    # System Wide
+    SITE="site",        # [Virtual] Environment Specific
+    ENV="env",          # from PIP_CONFIG_FILE
+    ENV_VAR="env-var",  # from Environment Variables
+)
+
+
+CONFIG_BASENAME = 'pip.ini' if WINDOWS else 'pip.conf'
+
+
+def get_configuration_files():
+    global_config_files = [
+        os.path.join(path, CONFIG_BASENAME)
+        for path in appdirs.site_config_dirs('pip')
+    ]
+
+    site_config_file = os.path.join(sys.prefix, CONFIG_BASENAME)
+    legacy_config_file = os.path.join(
+        expanduser('~'),
+        'pip' if WINDOWS else '.pip',
+        CONFIG_BASENAME,
+    )
+    new_config_file = os.path.join(
+        appdirs.user_config_dir("pip"), CONFIG_BASENAME
+    )
+    return {
+        kinds.GLOBAL: global_config_files,
+        kinds.SITE: [site_config_file],
+        kinds.USER: [legacy_config_file, new_config_file],
+    }
+
+
+class Configuration(object):
+    """Handles management of configuration.
+
+    Provides an interface to accessing and managing configuration files.
+
+    This class converts provides an API that takes "section.key-name" style
+    keys and stores the value associated with it as "key-name" under the
+    section "section".
+
+    This allows for a clean interface wherein the both the section and the
+    key-name are preserved in an easy to manage form in the configuration files
+    and the data stored is also nice.
+    """
+
+    def __init__(self, isolated, load_only=None):
+        # type: (bool, Kind) -> None
+        super(Configuration, self).__init__()
+
+        _valid_load_only = [kinds.USER, kinds.GLOBAL, kinds.SITE, None]
+        if load_only not in _valid_load_only:
+            raise ConfigurationError(
+                "Got invalid value for load_only - should be one of {}".format(
+                    ", ".join(map(repr, _valid_load_only[:-1]))
+                )
+            )
+        self.isolated = isolated  # type: bool
+        self.load_only = load_only  # type: Optional[Kind]
+
+        # The order here determines the override order.
+        self._override_order = [
+            kinds.GLOBAL, kinds.USER, kinds.SITE, kinds.ENV, kinds.ENV_VAR
+        ]
+
+        self._ignore_env_names = ["version", "help"]
+
+        # Because we keep track of where we got the data from
+        self._parsers = {
+            variant: [] for variant in self._override_order
+        }  # type: Dict[Kind, List[Tuple[str, RawConfigParser]]]
+        self._config = {
+            variant: {} for variant in self._override_order
+        }  # type: Dict[Kind, Dict[str, Any]]
+        self._modified_parsers = []  # type: List[Tuple[str, RawConfigParser]]
+
+    def load(self):
+        # type: () -> None
+        """Loads configuration from configuration files and environment
+        """
+        self._load_config_files()
+        if not self.isolated:
+            self._load_environment_vars()
+
+    def get_file_to_edit(self):
+        # type: () -> Optional[str]
+        """Returns the file with highest priority in configuration
+        """
+        assert self.load_only is not None, \
+            "Need to be specified a file to be editing"
+
+        try:
+            return self._get_parser_to_modify()[0]
+        except IndexError:
+            return None
+
+    def items(self):
+        # type: () -> Iterable[Tuple[str, Any]]
+        """Returns key-value pairs like dict.items() representing the loaded
+        configuration
+        """
+        return self._dictionary.items()
+
+    def get_value(self, key):
+        # type: (str) -> Any
+        """Get a value from the configuration.
+        """
+        try:
+            return self._dictionary[key]
+        except KeyError:
+            raise ConfigurationError("No such key - {}".format(key))
+
+    def set_value(self, key, value):
+        # type: (str, Any) -> None
+        """Modify a value in the configuration.
+        """
+        self._ensure_have_load_only()
+
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+
+            # Modify the parser and the configuration
+            if not parser.has_section(section):
+                parser.add_section(section)
+            parser.set(section, name, value)
+
+        self._config[self.load_only][key] = value
+        self._mark_as_modified(fname, parser)
+
+    def unset_value(self, key):
+        # type: (str) -> None
+        """Unset a value in the configuration.
+        """
+        self._ensure_have_load_only()
+
+        if key not in self._config[self.load_only]:
+            raise ConfigurationError("No such key - {}".format(key))
+
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+
+            # Remove the key in the parser
+            modified_something = False
+            if parser.has_section(section):
+                # Returns whether the option was removed or not
+                modified_something = parser.remove_option(section, name)
+
+            if modified_something:
+                # name removed from parser, section may now be empty
+                section_iter = iter(parser.items(section))
+                try:
+                    val = next(section_iter)
+                except StopIteration:
+                    val = None
+
+                if val is None:
+                    parser.remove_section(section)
+
+                self._mark_as_modified(fname, parser)
+            else:
+                raise ConfigurationError(
+                    "Fatal Internal error [id=1]. Please report as a bug."
+                )
+
+        del self._config[self.load_only][key]
+
+    def save(self):
+        # type: () -> None
+        """Save the current in-memory state.
+        """
+        self._ensure_have_load_only()
+
+        for fname, parser in self._modified_parsers:
+            logger.info("Writing to %s", fname)
+
+            # Ensure directory exists.
+            ensure_dir(os.path.dirname(fname))
+
+            with open(fname, "w") as f:
+                parser.write(f)
+
+    #
+    # Private routines
+    #
+
+    def _ensure_have_load_only(self):
+        # type: () -> None
+        if self.load_only is None:
+            raise ConfigurationError("Needed a specific file to be modifying.")
+        logger.debug("Will be working with %s variant only", self.load_only)
+
+    @property
+    def _dictionary(self):
+        # type: () -> Dict[str, Any]
+        """A dictionary representing the loaded configuration.
+        """
+        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
+        #       are not needed here.
+        retval = {}
+
+        for variant in self._override_order:
+            retval.update(self._config[variant])
+
+        return retval
+
+    def _load_config_files(self):
+        # type: () -> None
+        """Loads configuration from configuration files
+        """
+        config_files = dict(self._iter_config_files())
+        if config_files[kinds.ENV][0:1] == [os.devnull]:
+            logger.debug(
+                "Skipping loading configuration files due to "
+                "environment's PIP_CONFIG_FILE being os.devnull"
+            )
+            return
+
+        for variant, files in config_files.items():
+            for fname in files:
+                # If there's specific variant set in `load_only`, load only
+                # that variant, not the others.
+                if self.load_only is not None and variant != self.load_only:
+                    logger.debug(
+                        "Skipping file '%s' (variant: %s)", fname, variant
+                    )
+                    continue
+
+                parser = self._load_file(variant, fname)
+
+                # Keeping track of the parsers used
+                self._parsers[variant].append((fname, parser))
+
+    def _load_file(self, variant, fname):
+        # type: (Kind, str) -> RawConfigParser
+        logger.debug("For variant '%s', will try loading '%s'", variant, fname)
+        parser = self._construct_parser(fname)
+
+        for section in parser.sections():
+            items = parser.items(section)
+            self._config[variant].update(self._normalized_keys(section, items))
+
+        return parser
+
+    def _construct_parser(self, fname):
+        # type: (str) -> RawConfigParser
+        parser = configparser.RawConfigParser()
+        # If there is no such file, don't bother reading it but create the
+        # parser anyway, to hold the data.
+        # Doing this is useful when modifying and saving files, where we don't
+        # need to construct a parser.
+        if os.path.exists(fname):
+            try:
+                parser.read(fname)
+            except UnicodeDecodeError:
+                # See https://github.com/pypa/pip/issues/4963
+                raise ConfigurationFileCouldNotBeLoaded(
+                    reason="contains invalid {} characters".format(
+                        locale.getpreferredencoding(False)
+                    ),
+                    fname=fname,
+                )
+            except configparser.Error as error:
+                # See https://github.com/pypa/pip/issues/4893
+                raise ConfigurationFileCouldNotBeLoaded(error=error)
+        return parser
+
+    def _load_environment_vars(self):
+        # type: () -> None
+        """Loads configuration from environment variables
+        """
+        self._config[kinds.ENV_VAR].update(
+            self._normalized_keys(":env:", self._get_environ_vars())
+        )
+
+    def _normalized_keys(self, section, items):
+        # type: (str, Iterable[Tuple[str, Any]]) -> Dict[str, Any]
+        """Normalizes items to construct a dictionary with normalized keys.
+
+        This routine is where the names become keys and are made the same
+        regardless of source - configuration files or environment.
+        """
+        normalized = {}
+        for name, val in items:
+            key = section + "." + _normalize_name(name)
+            normalized[key] = val
+        return normalized
+
+    def _get_environ_vars(self):
+        # type: () -> Iterable[Tuple[str, str]]
+        """Returns a generator with all environmental vars with prefix PIP_"""
+        for key, val in os.environ.items():
+            should_be_yielded = (
+                key.startswith("PIP_") and
+                key[4:].lower() not in self._ignore_env_names
+            )
+            if should_be_yielded:
+                yield key[4:].lower(), val
+
+    # XXX: This is patched in the tests.
+    def _iter_config_files(self):
+        # type: () -> Iterable[Tuple[Kind, List[str]]]
+        """Yields variant and configuration files associated with it.
+
+        This should be treated like items of a dictionary.
+        """
+        # SMELL: Move the conditions out of this function
+
+        # environment variables have the lowest priority
+        config_file = os.environ.get('PIP_CONFIG_FILE', None)
+        if config_file is not None:
+            yield kinds.ENV, [config_file]
+        else:
+            yield kinds.ENV, []
+
+        config_files = get_configuration_files()
+
+        # at the base we have any global configuration
+        yield kinds.GLOBAL, config_files[kinds.GLOBAL]
+
+        # per-user configuration next
+        should_load_user_config = not self.isolated and not (
+            config_file and os.path.exists(config_file)
+        )
+        if should_load_user_config:
+            # The legacy config file is overridden by the new config file
+            yield kinds.USER, config_files[kinds.USER]
+
+        # finally virtualenv configuration first trumping others
+        yield kinds.SITE, config_files[kinds.SITE]
+
+    def _get_parser_to_modify(self):
+        # type: () -> Tuple[str, RawConfigParser]
+        # Determine which parser to modify
+        parsers = self._parsers[self.load_only]
+        if not parsers:
+            # This should not happen if everything works correctly.
+            raise ConfigurationError(
+                "Fatal Internal error [id=2]. Please report as a bug."
+            )
+
+        # Use the highest priority parser.
+        return parsers[-1]
+
+    # XXX: This is patched in the tests.
+    def _mark_as_modified(self, fname, parser):
+        # type: (str, RawConfigParser) -> None
+        file_parser_tuple = (fname, parser)
+        if file_parser_tuple not in self._modified_parsers:
+            self._modified_parsers.append(file_parser_tuple)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__init__.py
new file mode 100644
index 00000000..fdf332a8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__init__.py
@@ -0,0 +1,23 @@
+from pip._internal.distributions.source import SourceDistribution
+from pip._internal.distributions.wheel import WheelDistribution
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.distributions.base import AbstractDistribution
+    from pip._internal.req.req_install import InstallRequirement
+
+
+def make_distribution_for_install_requirement(install_req):
+    # type: (InstallRequirement) -> AbstractDistribution
+    """Returns a Distribution for the given InstallRequirement
+    """
+    # If it's not an editable, is a wheel, it's a WheelDistribution
+    if install_req.editable:
+        return SourceDistribution(install_req)
+
+    if install_req.link and install_req.is_wheel:
+        return WheelDistribution(install_req)
+
+    # Otherwise, a SourceDistribution
+    return SourceDistribution(install_req)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..122d53d7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/base.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/base.cpython-37.pyc
new file mode 100644
index 00000000..a120de57
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/base.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-37.pyc
new file mode 100644
index 00000000..b8607195
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/source.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/source.cpython-37.pyc
new file mode 100644
index 00000000..fb91159a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/source.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-37.pyc
new file mode 100644
index 00000000..594a21d4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/base.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/base.py
new file mode 100644
index 00000000..b9af3f02
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/base.py
@@ -0,0 +1,33 @@
+import abc
+
+from pip._vendor.six import add_metaclass
+
+
+@add_metaclass(abc.ABCMeta)
+class AbstractDistribution(object):
+    """A base class for handling installable artifacts.
+
+    The requirements for anything installable are as follows:
+
+     - we must be able to determine the requirement name
+       (or we can't correctly handle the non-upgrade case).
+
+     - for packages with setup requirements, we must also be able
+       to determine their requirements without installing additional
+       packages (for the same reason as run-time dependencies)
+
+     - we must be able to create a Distribution object exposing the
+       above metadata.
+    """
+
+    def __init__(self, req):
+        super(AbstractDistribution, self).__init__()
+        self.req = req
+
+    @abc.abstractmethod
+    def get_pkg_resources_distribution(self):
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        raise NotImplementedError()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/installed.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/installed.py
new file mode 100644
index 00000000..c4a64e7c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/installed.py
@@ -0,0 +1,15 @@
+from pip._internal.distributions.base import AbstractDistribution
+
+
+class InstalledDistribution(AbstractDistribution):
+    """Represents an installed package.
+
+    This does not need any preparation as the required information has already
+    been computed.
+    """
+
+    def get_pkg_resources_distribution(self):
+        return self.req.satisfied_by
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/source.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/source.py
new file mode 100644
index 00000000..e5d9fd4b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/source.py
@@ -0,0 +1,80 @@
+import logging
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.exceptions import InstallationError
+
+logger = logging.getLogger(__name__)
+
+
+class SourceDistribution(AbstractDistribution):
+    """Represents a source distribution.
+
+    The preparation step for these needs metadata for the packages to be
+    generated, either using PEP 517 or using the legacy `setup.py egg_info`.
+
+    NOTE from @pradyunsg (14 June 2019)
+    I expect SourceDistribution class will need to be split into
+    `legacy_source` (setup.py based) and `source` (PEP 517 based) when we start
+    bringing logic for preparation out of InstallRequirement into this class.
+    """
+
+    def get_pkg_resources_distribution(self):
+        return self.req.get_dist()
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        # Prepare for building. We need to:
+        #   1. Load pyproject.toml (if it exists)
+        #   2. Set up the build environment
+
+        self.req.load_pyproject_toml()
+        should_isolate = self.req.use_pep517 and build_isolation
+
+        def _raise_conflicts(conflicting_with, conflicting_reqs):
+            raise InstallationError(
+                "Some build dependencies for %s conflict with %s: %s." % (
+                    self.req, conflicting_with, ', '.join(
+                        '%s is incompatible with %s' % (installed, wanted)
+                        for installed, wanted in sorted(conflicting))))
+
+        if should_isolate:
+            # Isolate in a BuildEnvironment and install the build-time
+            # requirements.
+            self.req.build_env = BuildEnvironment()
+            self.req.build_env.install_requirements(
+                finder, self.req.pyproject_requires, 'overlay',
+                "Installing build dependencies"
+            )
+            conflicting, missing = self.req.build_env.check_requirements(
+                self.req.requirements_to_check
+            )
+            if conflicting:
+                _raise_conflicts("PEP 517/518 supported requirements",
+                                 conflicting)
+            if missing:
+                logger.warning(
+                    "Missing build requirements in pyproject.toml for %s.",
+                    self.req,
+                )
+                logger.warning(
+                    "The project does not specify a build backend, and "
+                    "pip cannot fall back to setuptools without %s.",
+                    " and ".join(map(repr, sorted(missing)))
+                )
+            # Install any extra build dependencies that the backend requests.
+            # This must be done in a second pass, as the pyproject.toml
+            # dependencies must be installed before we can call the backend.
+            with self.req.build_env:
+                # We need to have the env active when calling the hook.
+                self.req.spin_message = "Getting requirements to build wheel"
+                reqs = self.req.pep517_backend.get_requires_for_build_wheel()
+            conflicting, missing = self.req.build_env.check_requirements(reqs)
+            if conflicting:
+                _raise_conflicts("the backend dependencies", conflicting)
+            self.req.build_env.install_requirements(
+                finder, missing, 'normal',
+                "Installing backend dependencies"
+            )
+
+        self.req.prepare_metadata()
+        self.req.assert_source_matches_version()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/wheel.py
new file mode 100644
index 00000000..de7be38e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/distributions/wheel.py
@@ -0,0 +1,17 @@
+from pip._vendor import pkg_resources
+
+from pip._internal.distributions.base import AbstractDistribution
+
+
+class WheelDistribution(AbstractDistribution):
+    """Represents a wheel distribution.
+
+    This does not need any preparation as wheels can be directly unpacked.
+    """
+
+    def get_pkg_resources_distribution(self):
+        return list(pkg_resources.find_distributions(
+                    self.req.source_dir))[0]
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/download.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/download.py
new file mode 100644
index 00000000..8715eb5b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/download.py
@@ -0,0 +1,1163 @@
+from __future__ import absolute_import
+
+import cgi
+import email.utils
+import json
+import logging
+import mimetypes
+import os
+import platform
+import re
+import shutil
+import sys
+
+from pip._vendor import requests, urllib3
+from pip._vendor.cachecontrol import CacheControlAdapter
+from pip._vendor.cachecontrol.caches import FileCache
+from pip._vendor.lockfile import LockError
+from pip._vendor.requests.adapters import BaseAdapter, HTTPAdapter
+from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+from pip._vendor.requests.structures import CaseInsensitiveDict
+from pip._vendor.requests.utils import get_netrc_auth
+# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import
+from pip._vendor.six.moves import xmlrpc_client  # type: ignore
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+import pip
+from pip._internal.exceptions import HashMismatch, InstallationError
+from pip._internal.models.index import PyPI
+# Import ssl from compat so the initial import occurs in only one place.
+from pip._internal.utils.compat import HAS_TLS, ssl
+from pip._internal.utils.encoding import auto_decode
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.glibc import libc_ver
+from pip._internal.utils.marker_files import write_delete_marker_file
+from pip._internal.utils.misc import (
+    ARCHIVE_EXTENSIONS, ask, ask_input, ask_password, ask_path_exists,
+    backup_dir, consume, display_path, format_size, get_installed_version,
+    path_to_url, remove_auth_from_url, rmtree, split_auth_netloc_from_url,
+    splitext, unpack_file,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.ui import DownloadProgressProvider
+from pip._internal.vcs import vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Optional, Tuple, Dict, IO, Text, Union
+    )
+    from optparse import Values
+    from pip._internal.models.link import Link
+    from pip._internal.utils.hashes import Hashes
+    from pip._internal.vcs.versioncontrol import AuthInfo, VersionControl
+
+    Credentials = Tuple[str, str, str]
+
+
+__all__ = ['get_file_content',
+           'is_url', 'url_to_path', 'path_to_url',
+           'is_archive_file', 'unpack_vcs_link',
+           'unpack_file_url', 'is_vcs_url', 'is_file_url',
+           'unpack_http_url', 'unpack_url',
+           'parse_content_disposition', 'sanitize_content_filename']
+
+
+logger = logging.getLogger(__name__)
+
+
+try:
+    import keyring  # noqa
+except ImportError:
+    keyring = None
+except Exception as exc:
+    logger.warning("Keyring is skipped due to an exception: %s",
+                   str(exc))
+    keyring = None
+
+# These are environment variables present when running under various
+# CI systems.  For each variable, some CI systems that use the variable
+# are indicated.  The collection was chosen so that for each of a number
+# of popular systems, at least one of the environment variables is used.
+# This list is used to provide some indication of and lower bound for
+# CI traffic to PyPI.  Thus, it is okay if the list is not comprehensive.
+# For more background, see: https://github.com/pypa/pip/issues/5499
+CI_ENVIRONMENT_VARIABLES = (
+    # Azure Pipelines
+    'BUILD_BUILDID',
+    # Jenkins
+    'BUILD_ID',
+    # AppVeyor, CircleCI, Codeship, Gitlab CI, Shippable, Travis CI
+    'CI',
+    # Explicit environment variable.
+    'PIP_IS_CI',
+)
+
+
+def looks_like_ci():
+    # type: () -> bool
+    """
+    Return whether it looks like pip is running under CI.
+    """
+    # We don't use the method of checking for a tty (e.g. using isatty())
+    # because some CI systems mimic a tty (e.g. Travis CI).  Thus that
+    # method doesn't provide definitive information in either direction.
+    return any(name in os.environ for name in CI_ENVIRONMENT_VARIABLES)
+
+
+def user_agent():
+    """
+    Return a string representing the user agent.
+    """
+    data = {
+        "installer": {"name": "pip", "version": pip.__version__},
+        "python": platform.python_version(),
+        "implementation": {
+            "name": platform.python_implementation(),
+        },
+    }
+
+    if data["implementation"]["name"] == 'CPython':
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == 'PyPy':
+        if sys.pypy_version_info.releaselevel == 'final':
+            pypy_version_info = sys.pypy_version_info[:3]
+        else:
+            pypy_version_info = sys.pypy_version_info
+        data["implementation"]["version"] = ".".join(
+            [str(x) for x in pypy_version_info]
+        )
+    elif data["implementation"]["name"] == 'Jython':
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == 'IronPython':
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+
+    if sys.platform.startswith("linux"):
+        from pip._vendor import distro
+        distro_infos = dict(filter(
+            lambda x: x[1],
+            zip(["name", "version", "id"], distro.linux_distribution()),
+        ))
+        libc = dict(filter(
+            lambda x: x[1],
+            zip(["lib", "version"], libc_ver()),
+        ))
+        if libc:
+            distro_infos["libc"] = libc
+        if distro_infos:
+            data["distro"] = distro_infos
+
+    if sys.platform.startswith("darwin") and platform.mac_ver()[0]:
+        data["distro"] = {"name": "macOS", "version": platform.mac_ver()[0]}
+
+    if platform.system():
+        data.setdefault("system", {})["name"] = platform.system()
+
+    if platform.release():
+        data.setdefault("system", {})["release"] = platform.release()
+
+    if platform.machine():
+        data["cpu"] = platform.machine()
+
+    if HAS_TLS:
+        data["openssl_version"] = ssl.OPENSSL_VERSION
+
+    setuptools_version = get_installed_version("setuptools")
+    if setuptools_version is not None:
+        data["setuptools_version"] = setuptools_version
+
+    # Use None rather than False so as not to give the impression that
+    # pip knows it is not being run under CI.  Rather, it is a null or
+    # inconclusive result.  Also, we include some value rather than no
+    # value to make it easier to know that the check has been run.
+    data["ci"] = True if looks_like_ci() else None
+
+    user_data = os.environ.get("PIP_USER_AGENT_USER_DATA")
+    if user_data is not None:
+        data["user_data"] = user_data
+
+    return "{data[installer][name]}/{data[installer][version]} {json}".format(
+        data=data,
+        json=json.dumps(data, separators=(",", ":"), sort_keys=True),
+    )
+
+
+def _get_keyring_auth(url, username):
+    """Return the tuple auth for a given url from keyring."""
+    if not url or not keyring:
+        return None
+
+    try:
+        try:
+            get_credential = keyring.get_credential
+        except AttributeError:
+            pass
+        else:
+            logger.debug("Getting credentials from keyring for %s", url)
+            cred = get_credential(url, username)
+            if cred is not None:
+                return cred.username, cred.password
+            return None
+
+        if username:
+            logger.debug("Getting password from keyring for %s", url)
+            password = keyring.get_password(url, username)
+            if password:
+                return username, password
+
+    except Exception as exc:
+        logger.warning("Keyring is skipped due to an exception: %s",
+                       str(exc))
+
+
+class MultiDomainBasicAuth(AuthBase):
+
+    def __init__(self, prompting=True, index_urls=None):
+        # type: (bool, Optional[Values]) -> None
+        self.prompting = prompting
+        self.index_urls = index_urls
+        self.passwords = {}  # type: Dict[str, AuthInfo]
+        # When the user is prompted to enter credentials and keyring is
+        # available, we will offer to save them. If the user accepts,
+        # this value is set to the credentials they entered. After the
+        # request authenticates, the caller should call
+        # ``save_credentials`` to save these.
+        self._credentials_to_save = None  # type: Optional[Credentials]
+
+    def _get_index_url(self, url):
+        """Return the original index URL matching the requested URL.
+
+        Cached or dynamically generated credentials may work against
+        the original index URL rather than just the netloc.
+
+        The provided url should have had its username and password
+        removed already. If the original index url had credentials then
+        they will be included in the return value.
+
+        Returns None if no matching index was found, or if --no-index
+        was specified by the user.
+        """
+        if not url or not self.index_urls:
+            return None
+
+        for u in self.index_urls:
+            prefix = remove_auth_from_url(u).rstrip("/") + "/"
+            if url.startswith(prefix):
+                return u
+
+    def _get_new_credentials(self, original_url, allow_netrc=True,
+                             allow_keyring=True):
+        """Find and return credentials for the specified URL."""
+        # Split the credentials and netloc from the url.
+        url, netloc, url_user_password = split_auth_netloc_from_url(
+            original_url)
+
+        # Start with the credentials embedded in the url
+        username, password = url_user_password
+        if username is not None and password is not None:
+            logger.debug("Found credentials in url for %s", netloc)
+            return url_user_password
+
+        # Find a matching index url for this request
+        index_url = self._get_index_url(url)
+        if index_url:
+            # Split the credentials from the url.
+            index_info = split_auth_netloc_from_url(index_url)
+            if index_info:
+                index_url, _, index_url_user_password = index_info
+                logger.debug("Found index url %s", index_url)
+
+        # If an index URL was found, try its embedded credentials
+        if index_url and index_url_user_password[0] is not None:
+            username, password = index_url_user_password
+            if username is not None and password is not None:
+                logger.debug("Found credentials in index url for %s", netloc)
+                return index_url_user_password
+
+        # Get creds from netrc if we still don't have them
+        if allow_netrc:
+            netrc_auth = get_netrc_auth(original_url)
+            if netrc_auth:
+                logger.debug("Found credentials in netrc for %s", netloc)
+                return netrc_auth
+
+        # If we don't have a password and keyring is available, use it.
+        if allow_keyring:
+            # The index url is more specific than the netloc, so try it first
+            kr_auth = (_get_keyring_auth(index_url, username) or
+                       _get_keyring_auth(netloc, username))
+            if kr_auth:
+                logger.debug("Found credentials in keyring for %s", netloc)
+                return kr_auth
+
+        return None, None
+
+    def _get_url_and_credentials(self, original_url):
+        """Return the credentials to use for the provided URL.
+
+        If allowed, netrc and keyring may be used to obtain the
+        correct credentials.
+
+        Returns (url_without_credentials, username, password). Note
+        that even if the original URL contains credentials, this
+        function may return a different username and password.
+        """
+        url, netloc, _ = split_auth_netloc_from_url(original_url)
+
+        # Use any stored credentials that we have for this netloc
+        username, password = self.passwords.get(netloc, (None, None))
+
+        # If nothing cached, acquire new credentials without prompting
+        # the user (e.g. from netrc, keyring, or similar).
+        if username is None or password is None:
+            username, password = self._get_new_credentials(original_url)
+
+        if username is not None and password is not None:
+            # Store the username and password
+            self.passwords[netloc] = (username, password)
+
+        return url, username, password
+
+    def __call__(self, req):
+        # Get credentials for this request
+        url, username, password = self._get_url_and_credentials(req.url)
+
+        # Set the url of the request to the url without any credentials
+        req.url = url
+
+        if username is not None and password is not None:
+            # Send the basic auth with this request
+            req = HTTPBasicAuth(username, password)(req)
+
+        # Attach a hook to handle 401 responses
+        req.register_hook("response", self.handle_401)
+
+        return req
+
+    # Factored out to allow for easy patching in tests
+    def _prompt_for_password(self, netloc):
+        username = ask_input("User for %s: " % netloc)
+        if not username:
+            return None, None
+        auth = _get_keyring_auth(netloc, username)
+        if auth:
+            return auth[0], auth[1], False
+        password = ask_password("Password: ")
+        return username, password, True
+
+    # Factored out to allow for easy patching in tests
+    def _should_save_password_to_keyring(self):
+        if not keyring:
+            return False
+        return ask("Save credentials to keyring [y/N]: ", ["y", "n"]) == "y"
+
+    def handle_401(self, resp, **kwargs):
+        # We only care about 401 responses, anything else we want to just
+        #   pass through the actual response
+        if resp.status_code != 401:
+            return resp
+
+        # We are not able to prompt the user so simply return the response
+        if not self.prompting:
+            return resp
+
+        parsed = urllib_parse.urlparse(resp.url)
+
+        # Prompt the user for a new username and password
+        username, password, save = self._prompt_for_password(parsed.netloc)
+
+        # Store the new username and password to use for future requests
+        self._credentials_to_save = None
+        if username is not None and password is not None:
+            self.passwords[parsed.netloc] = (username, password)
+
+            # Prompt to save the password to keyring
+            if save and self._should_save_password_to_keyring():
+                self._credentials_to_save = (parsed.netloc, username, password)
+
+        # Consume content and release the original connection to allow our new
+        #   request to reuse the same one.
+        resp.content
+        resp.raw.release_conn()
+
+        # Add our new username and password to the request
+        req = HTTPBasicAuth(username or "", password or "")(resp.request)
+        req.register_hook("response", self.warn_on_401)
+
+        # On successful request, save the credentials that were used to
+        # keyring. (Note that if the user responded "no" above, this member
+        # is not set and nothing will be saved.)
+        if self._credentials_to_save:
+            req.register_hook("response", self.save_credentials)
+
+        # Send our new request
+        new_resp = resp.connection.send(req, **kwargs)
+        new_resp.history.append(resp)
+
+        return new_resp
+
+    def warn_on_401(self, resp, **kwargs):
+        """Response callback to warn about incorrect credentials."""
+        if resp.status_code == 401:
+            logger.warning('401 Error, Credentials not correct for %s',
+                           resp.request.url)
+
+    def save_credentials(self, resp, **kwargs):
+        """Response callback to save credentials on success."""
+        assert keyring is not None, "should never reach here without keyring"
+        if not keyring:
+            return
+
+        creds = self._credentials_to_save
+        self._credentials_to_save = None
+        if creds and resp.status_code < 400:
+            try:
+                logger.info('Saving credentials to keyring')
+                keyring.set_password(*creds)
+            except Exception:
+                logger.exception('Failed to save credentials')
+
+
+class LocalFSAdapter(BaseAdapter):
+
+    def send(self, request, stream=None, timeout=None, verify=None, cert=None,
+             proxies=None):
+        pathname = url_to_path(request.url)
+
+        resp = Response()
+        resp.status_code = 200
+        resp.url = request.url
+
+        try:
+            stats = os.stat(pathname)
+        except OSError as exc:
+            resp.status_code = 404
+            resp.raw = exc
+        else:
+            modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
+            content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
+            resp.headers = CaseInsensitiveDict({
+                "Content-Type": content_type,
+                "Content-Length": stats.st_size,
+                "Last-Modified": modified,
+            })
+
+            resp.raw = open(pathname, "rb")
+            resp.close = resp.raw.close
+
+        return resp
+
+    def close(self):
+        pass
+
+
+class SafeFileCache(FileCache):
+    """
+    A file based cache which is safe to use even when the target directory may
+    not be accessible or writable.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super(SafeFileCache, self).__init__(*args, **kwargs)
+
+        # Check to ensure that the directory containing our cache directory
+        # is owned by the user current executing pip. If it does not exist
+        # we will check the parent directory until we find one that does exist.
+        # If it is not owned by the user executing pip then we will disable
+        # the cache and log a warning.
+        if not check_path_owner(self.directory):
+            logger.warning(
+                "The directory '%s' or its parent directory is not owned by "
+                "the current user and the cache has been disabled. Please "
+                "check the permissions and owner of that directory. If "
+                "executing pip with sudo, you may want sudo's -H flag.",
+                self.directory,
+            )
+
+            # Set our directory to None to disable the Cache
+            self.directory = None
+
+    def get(self, *args, **kwargs):
+        # If we don't have a directory, then the cache should be a no-op.
+        if self.directory is None:
+            return
+
+        try:
+            return super(SafeFileCache, self).get(*args, **kwargs)
+        except (LockError, OSError, IOError):
+            # We intentionally silence this error, if we can't access the cache
+            # then we can just skip caching and process the request as if
+            # caching wasn't enabled.
+            pass
+
+    def set(self, *args, **kwargs):
+        # If we don't have a directory, then the cache should be a no-op.
+        if self.directory is None:
+            return
+
+        try:
+            return super(SafeFileCache, self).set(*args, **kwargs)
+        except (LockError, OSError, IOError):
+            # We intentionally silence this error, if we can't access the cache
+            # then we can just skip caching and process the request as if
+            # caching wasn't enabled.
+            pass
+
+    def delete(self, *args, **kwargs):
+        # If we don't have a directory, then the cache should be a no-op.
+        if self.directory is None:
+            return
+
+        try:
+            return super(SafeFileCache, self).delete(*args, **kwargs)
+        except (LockError, OSError, IOError):
+            # We intentionally silence this error, if we can't access the cache
+            # then we can just skip caching and process the request as if
+            # caching wasn't enabled.
+            pass
+
+
+class InsecureHTTPAdapter(HTTPAdapter):
+
+    def cert_verify(self, conn, url, verify, cert):
+        conn.cert_reqs = 'CERT_NONE'
+        conn.ca_certs = None
+
+
+class PipSession(requests.Session):
+
+    timeout = None  # type: Optional[int]
+
+    def __init__(self, *args, **kwargs):
+        retries = kwargs.pop("retries", 0)
+        cache = kwargs.pop("cache", None)
+        insecure_hosts = kwargs.pop("insecure_hosts", [])
+        index_urls = kwargs.pop("index_urls", None)
+
+        super(PipSession, self).__init__(*args, **kwargs)
+
+        # Attach our User Agent to the request
+        self.headers["User-Agent"] = user_agent()
+
+        # Attach our Authentication handler to the session
+        self.auth = MultiDomainBasicAuth(index_urls=index_urls)
+
+        # Create our urllib3.Retry instance which will allow us to customize
+        # how we handle retries.
+        retries = urllib3.Retry(
+            # Set the total number of retries that a particular request can
+            # have.
+            total=retries,
+
+            # A 503 error from PyPI typically means that the Fastly -> Origin
+            # connection got interrupted in some way. A 503 error in general
+            # is typically considered a transient error so we'll go ahead and
+            # retry it.
+            # A 500 may indicate transient error in Amazon S3
+            # A 520 or 527 - may indicate transient error in CloudFlare
+            status_forcelist=[500, 503, 520, 527],
+
+            # Add a small amount of back off between failed requests in
+            # order to prevent hammering the service.
+            backoff_factor=0.25,
+        )
+
+        # We want to _only_ cache responses on securely fetched origins. We do
+        # this because we can't validate the response of an insecurely fetched
+        # origin, and we don't want someone to be able to poison the cache and
+        # require manual eviction from the cache to fix it.
+        if cache:
+            secure_adapter = CacheControlAdapter(
+                cache=SafeFileCache(cache, use_dir_lock=True),
+                max_retries=retries,
+            )
+        else:
+            secure_adapter = HTTPAdapter(max_retries=retries)
+
+        # Our Insecure HTTPAdapter disables HTTPS validation. It does not
+        # support caching (see above) so we'll use it for all http:// URLs as
+        # well as any https:// host that we've marked as ignoring TLS errors
+        # for.
+        insecure_adapter = InsecureHTTPAdapter(max_retries=retries)
+        # Save this for later use in add_insecure_host().
+        self._insecure_adapter = insecure_adapter
+
+        self.mount("https://", secure_adapter)
+        self.mount("http://", insecure_adapter)
+
+        # Enable file:// urls
+        self.mount("file://", LocalFSAdapter())
+
+        # We want to use a non-validating adapter for any requests which are
+        # deemed insecure.
+        for host in insecure_hosts:
+            self.add_insecure_host(host)
+
+    def add_insecure_host(self, host):
+        # type: (str) -> None
+        self.mount('https://{}/'.format(host), self._insecure_adapter)
+
+    def request(self, method, url, *args, **kwargs):
+        # Allow setting a default timeout on a session
+        kwargs.setdefault("timeout", self.timeout)
+
+        # Dispatch the actual request
+        return super(PipSession, self).request(method, url, *args, **kwargs)
+
+
+def get_file_content(url, comes_from=None, session=None):
+    # type: (str, Optional[str], Optional[PipSession]) -> Tuple[str, Text]
+    """Gets the content of a file; it may be a filename, file: URL, or
+    http: URL.  Returns (location, content).  Content is unicode.
+
+    :param url:         File path or url.
+    :param comes_from:  Origin description of requirements.
+    :param session:     Instance of pip.download.PipSession.
+    """
+    if session is None:
+        raise TypeError(
+            "get_file_content() missing 1 required keyword argument: 'session'"
+        )
+
+    match = _scheme_re.search(url)
+    if match:
+        scheme = match.group(1).lower()
+        if (scheme == 'file' and comes_from and
+                comes_from.startswith('http')):
+            raise InstallationError(
+                'Requirements file %s references URL %s, which is local'
+                % (comes_from, url))
+        if scheme == 'file':
+            path = url.split(':', 1)[1]
+            path = path.replace('\\', '/')
+            match = _url_slash_drive_re.match(path)
+            if match:
+                path = match.group(1) + ':' + path.split('|', 1)[1]
+            path = urllib_parse.unquote(path)
+            if path.startswith('/'):
+                path = '/' + path.lstrip('/')
+            url = path
+        else:
+            # FIXME: catch some errors
+            resp = session.get(url)
+            resp.raise_for_status()
+            return resp.url, resp.text
+    try:
+        with open(url, 'rb') as f:
+            content = auto_decode(f.read())
+    except IOError as exc:
+        raise InstallationError(
+            'Could not open requirements file: %s' % str(exc)
+        )
+    return url, content
+
+
+_scheme_re = re.compile(r'^(http|https|file):', re.I)
+_url_slash_drive_re = re.compile(r'/*([a-z])\|', re.I)
+
+
+def is_url(name):
+    # type: (Union[str, Text]) -> bool
+    """Returns true if the name looks like a URL"""
+    if ':' not in name:
+        return False
+    scheme = name.split(':', 1)[0].lower()
+    return scheme in ['http', 'https', 'file', 'ftp'] + vcs.all_schemes
+
+
+def url_to_path(url):
+    # type: (str) -> str
+    """
+    Convert a file: URL to a path.
+    """
+    assert url.startswith('file:'), (
+        "You can only turn file: urls into filenames (not %r)" % url)
+
+    _, netloc, path, _, _ = urllib_parse.urlsplit(url)
+
+    if not netloc or netloc == 'localhost':
+        # According to RFC 8089, same as empty authority.
+        netloc = ''
+    elif sys.platform == 'win32':
+        # If we have a UNC path, prepend UNC share notation.
+        netloc = '\\\\' + netloc
+    else:
+        raise ValueError(
+            'non-local file URIs are not supported on this platform: %r'
+            % url
+        )
+
+    path = urllib_request.url2pathname(netloc + path)
+    return path
+
+
+def is_archive_file(name):
+    # type: (str) -> bool
+    """Return True if `name` is a considered as an archive file."""
+    ext = splitext(name)[1].lower()
+    if ext in ARCHIVE_EXTENSIONS:
+        return True
+    return False
+
+
+def unpack_vcs_link(link, location):
+    vcs_backend = _get_used_vcs_backend(link)
+    vcs_backend.unpack(location, url=link.url)
+
+
+def _get_used_vcs_backend(link):
+    # type: (Link) -> Optional[VersionControl]
+    """
+    Return a VersionControl object or None.
+    """
+    for vcs_backend in vcs.backends:
+        if link.scheme in vcs_backend.schemes:
+            return vcs_backend
+    return None
+
+
+def is_vcs_url(link):
+    # type: (Link) -> bool
+    return bool(_get_used_vcs_backend(link))
+
+
+def is_file_url(link):
+    # type: (Link) -> bool
+    return link.url.lower().startswith('file:')
+
+
+def is_dir_url(link):
+    # type: (Link) -> bool
+    """Return whether a file:// Link points to a directory.
+
+    ``link`` must not have any other scheme but file://. Call is_file_url()
+    first.
+
+    """
+    link_path = url_to_path(link.url_without_fragment)
+    return os.path.isdir(link_path)
+
+
+def _progress_indicator(iterable, *args, **kwargs):
+    return iterable
+
+
+def _download_url(
+    resp,  # type: Response
+    link,  # type: Link
+    content_file,  # type: IO
+    hashes,  # type: Optional[Hashes]
+    progress_bar  # type: str
+):
+    # type: (...) -> None
+    try:
+        total_length = int(resp.headers['content-length'])
+    except (ValueError, KeyError, TypeError):
+        total_length = 0
+
+    cached_resp = getattr(resp, "from_cache", False)
+    if logger.getEffectiveLevel() > logging.INFO:
+        show_progress = False
+    elif cached_resp:
+        show_progress = False
+    elif total_length > (40 * 1000):
+        show_progress = True
+    elif not total_length:
+        show_progress = True
+    else:
+        show_progress = False
+
+    show_url = link.show_url
+
+    def resp_read(chunk_size):
+        try:
+            # Special case for urllib3.
+            for chunk in resp.raw.stream(
+                    chunk_size,
+                    # We use decode_content=False here because we don't
+                    # want urllib3 to mess with the raw bytes we get
+                    # from the server. If we decompress inside of
+                    # urllib3 then we cannot verify the checksum
+                    # because the checksum will be of the compressed
+                    # file. This breakage will only occur if the
+                    # server adds a Content-Encoding header, which
+                    # depends on how the server was configured:
+                    # - Some servers will notice that the file isn't a
+                    #   compressible file and will leave the file alone
+                    #   and with an empty Content-Encoding
+                    # - Some servers will notice that the file is
+                    #   already compressed and will leave the file
+                    #   alone and will add a Content-Encoding: gzip
+                    #   header
+                    # - Some servers won't notice anything at all and
+                    #   will take a file that's already been compressed
+                    #   and compress it again and set the
+                    #   Content-Encoding: gzip header
+                    #
+                    # By setting this not to decode automatically we
+                    # hope to eliminate problems with the second case.
+                    decode_content=False):
+                yield chunk
+        except AttributeError:
+            # Standard file-like object.
+            while True:
+                chunk = resp.raw.read(chunk_size)
+                if not chunk:
+                    break
+                yield chunk
+
+    def written_chunks(chunks):
+        for chunk in chunks:
+            content_file.write(chunk)
+            yield chunk
+
+    progress_indicator = _progress_indicator
+
+    if link.netloc == PyPI.netloc:
+        url = show_url
+    else:
+        url = link.url_without_fragment
+
+    if show_progress:  # We don't show progress on cached responses
+        progress_indicator = DownloadProgressProvider(progress_bar,
+                                                      max=total_length)
+        if total_length:
+            logger.info("Downloading %s (%s)", url, format_size(total_length))
+        else:
+            logger.info("Downloading %s", url)
+    elif cached_resp:
+        logger.info("Using cached %s", url)
+    else:
+        logger.info("Downloading %s", url)
+
+    logger.debug('Downloading from URL %s', link)
+
+    downloaded_chunks = written_chunks(
+        progress_indicator(
+            resp_read(CONTENT_CHUNK_SIZE),
+            CONTENT_CHUNK_SIZE
+        )
+    )
+    if hashes:
+        hashes.check_against_chunks(downloaded_chunks)
+    else:
+        consume(downloaded_chunks)
+
+
+def _copy_file(filename, location, link):
+    copy = True
+    download_location = os.path.join(location, link.filename)
+    if os.path.exists(download_location):
+        response = ask_path_exists(
+            'The file %s exists. (i)gnore, (w)ipe, (b)ackup, (a)abort' %
+            display_path(download_location), ('i', 'w', 'b', 'a'))
+        if response == 'i':
+            copy = False
+        elif response == 'w':
+            logger.warning('Deleting %s', display_path(download_location))
+            os.remove(download_location)
+        elif response == 'b':
+            dest_file = backup_dir(download_location)
+            logger.warning(
+                'Backing up %s to %s',
+                display_path(download_location),
+                display_path(dest_file),
+            )
+            shutil.move(download_location, dest_file)
+        elif response == 'a':
+            sys.exit(-1)
+    if copy:
+        shutil.copy(filename, download_location)
+        logger.info('Saved %s', display_path(download_location))
+
+
+def unpack_http_url(
+    link,  # type: Link
+    location,  # type: str
+    download_dir=None,  # type: Optional[str]
+    session=None,  # type: Optional[PipSession]
+    hashes=None,  # type: Optional[Hashes]
+    progress_bar="on"  # type: str
+):
+    # type: (...) -> None
+    if session is None:
+        raise TypeError(
+            "unpack_http_url() missing 1 required keyword argument: 'session'"
+        )
+
+    with TempDirectory(kind="unpack") as temp_dir:
+        # If a download dir is specified, is the file already downloaded there?
+        already_downloaded_path = None
+        if download_dir:
+            already_downloaded_path = _check_download_dir(link,
+                                                          download_dir,
+                                                          hashes)
+
+        if already_downloaded_path:
+            from_path = already_downloaded_path
+            content_type = mimetypes.guess_type(from_path)[0]
+        else:
+            # let's download to a tmp dir
+            from_path, content_type = _download_http_url(link,
+                                                         session,
+                                                         temp_dir.path,
+                                                         hashes,
+                                                         progress_bar)
+
+        # unpack the archive to the build dir location. even when only
+        # downloading archives, they have to be unpacked to parse dependencies
+        unpack_file(from_path, location, content_type, link)
+
+        # a download dir is specified; let's copy the archive there
+        if download_dir and not already_downloaded_path:
+            _copy_file(from_path, download_dir, link)
+
+        if not already_downloaded_path:
+            os.unlink(from_path)
+
+
+def unpack_file_url(
+    link,  # type: Link
+    location,  # type: str
+    download_dir=None,  # type: Optional[str]
+    hashes=None  # type: Optional[Hashes]
+):
+    # type: (...) -> None
+    """Unpack link into location.
+
+    If download_dir is provided and link points to a file, make a copy
+    of the link file inside download_dir.
+    """
+    link_path = url_to_path(link.url_without_fragment)
+
+    # If it's a url to a local directory
+    if is_dir_url(link):
+        if os.path.isdir(location):
+            rmtree(location)
+        shutil.copytree(link_path, location, symlinks=True)
+        if download_dir:
+            logger.info('Link is a directory, ignoring download_dir')
+        return
+
+    # If --require-hashes is off, `hashes` is either empty, the
+    # link's embedded hash, or MissingHashes; it is required to
+    # match. If --require-hashes is on, we are satisfied by any
+    # hash in `hashes` matching: a URL-based or an option-based
+    # one; no internet-sourced hash will be in `hashes`.
+    if hashes:
+        hashes.check_against_path(link_path)
+
+    # If a download dir is specified, is the file already there and valid?
+    already_downloaded_path = None
+    if download_dir:
+        already_downloaded_path = _check_download_dir(link,
+                                                      download_dir,
+                                                      hashes)
+
+    if already_downloaded_path:
+        from_path = already_downloaded_path
+    else:
+        from_path = link_path
+
+    content_type = mimetypes.guess_type(from_path)[0]
+
+    # unpack the archive to the build dir location. even when only downloading
+    # archives, they have to be unpacked to parse dependencies
+    unpack_file(from_path, location, content_type, link)
+
+    # a download dir is specified and not already downloaded
+    if download_dir and not already_downloaded_path:
+        _copy_file(from_path, download_dir, link)
+
+
+class PipXmlrpcTransport(xmlrpc_client.Transport):
+    """Provide a `xmlrpclib.Transport` implementation via a `PipSession`
+    object.
+    """
+
+    def __init__(self, index_url, session, use_datetime=False):
+        xmlrpc_client.Transport.__init__(self, use_datetime)
+        index_parts = urllib_parse.urlparse(index_url)
+        self._scheme = index_parts.scheme
+        self._session = session
+
+    def request(self, host, handler, request_body, verbose=False):
+        parts = (self._scheme, host, handler, None, None, None)
+        url = urllib_parse.urlunparse(parts)
+        try:
+            headers = {'Content-Type': 'text/xml'}
+            response = self._session.post(url, data=request_body,
+                                          headers=headers, stream=True)
+            response.raise_for_status()
+            self.verbose = verbose
+            return self.parse_response(response.raw)
+        except requests.HTTPError as exc:
+            logger.critical(
+                "HTTP error %s while getting %s",
+                exc.response.status_code, url,
+            )
+            raise
+
+
+def unpack_url(
+    link,  # type: Link
+    location,  # type: str
+    download_dir=None,  # type: Optional[str]
+    only_download=False,  # type: bool
+    session=None,  # type: Optional[PipSession]
+    hashes=None,  # type: Optional[Hashes]
+    progress_bar="on"  # type: str
+):
+    # type: (...) -> None
+    """Unpack link.
+       If link is a VCS link:
+         if only_download, export into download_dir and ignore location
+          else unpack into location
+       for other types of link:
+         - unpack into location
+         - if download_dir, copy the file into download_dir
+         - if only_download, mark location for deletion
+
+    :param hashes: A Hashes object, one of whose embedded hashes must match,
+        or HashMismatch will be raised. If the Hashes is empty, no matches are
+        required, and unhashable types of requirements (like VCS ones, which
+        would ordinarily raise HashUnsupported) are allowed.
+    """
+    # non-editable vcs urls
+    if is_vcs_url(link):
+        unpack_vcs_link(link, location)
+
+    # file urls
+    elif is_file_url(link):
+        unpack_file_url(link, location, download_dir, hashes=hashes)
+
+    # http urls
+    else:
+        if session is None:
+            session = PipSession()
+
+        unpack_http_url(
+            link,
+            location,
+            download_dir,
+            session,
+            hashes=hashes,
+            progress_bar=progress_bar
+        )
+    if only_download:
+        write_delete_marker_file(location)
+
+
+def sanitize_content_filename(filename):
+    # type: (str) -> str
+    """
+    Sanitize the "filename" value from a Content-Disposition header.
+    """
+    return os.path.basename(filename)
+
+
+def parse_content_disposition(content_disposition, default_filename):
+    # type: (str, str) -> str
+    """
+    Parse the "filename" value from a Content-Disposition header, and
+    return the default filename if the result is empty.
+    """
+    _type, params = cgi.parse_header(content_disposition)
+    filename = params.get('filename')
+    if filename:
+        # We need to sanitize the filename to prevent directory traversal
+        # in case the filename contains ".." path parts.
+        filename = sanitize_content_filename(filename)
+    return filename or default_filename
+
+
+def _download_http_url(
+    link,  # type: Link
+    session,  # type: PipSession
+    temp_dir,  # type: str
+    hashes,  # type: Optional[Hashes]
+    progress_bar  # type: str
+):
+    # type: (...) -> Tuple[str, str]
+    """Download link url into temp_dir using provided session"""
+    target_url = link.url.split('#', 1)[0]
+    try:
+        resp = session.get(
+            target_url,
+            # We use Accept-Encoding: identity here because requests
+            # defaults to accepting compressed responses. This breaks in
+            # a variety of ways depending on how the server is configured.
+            # - Some servers will notice that the file isn't a compressible
+            #   file and will leave the file alone and with an empty
+            #   Content-Encoding
+            # - Some servers will notice that the file is already
+            #   compressed and will leave the file alone and will add a
+            #   Content-Encoding: gzip header
+            # - Some servers won't notice anything at all and will take
+            #   a file that's already been compressed and compress it again
+            #   and set the Content-Encoding: gzip header
+            # By setting this to request only the identity encoding We're
+            # hoping to eliminate the third case. Hopefully there does not
+            # exist a server which when given a file will notice it is
+            # already compressed and that you're not asking for a
+            # compressed file and will then decompress it before sending
+            # because if that's the case I don't think it'll ever be
+            # possible to make this work.
+            headers={"Accept-Encoding": "identity"},
+            stream=True,
+        )
+        resp.raise_for_status()
+    except requests.HTTPError as exc:
+        logger.critical(
+            "HTTP error %s while getting %s", exc.response.status_code, link,
+        )
+        raise
+
+    content_type = resp.headers.get('content-type', '')
+    filename = link.filename  # fallback
+    # Have a look at the Content-Disposition header for a better guess
+    content_disposition = resp.headers.get('content-disposition')
+    if content_disposition:
+        filename = parse_content_disposition(content_disposition, filename)
+    ext = splitext(filename)[1]  # type: Optional[str]
+    if not ext:
+        ext = mimetypes.guess_extension(content_type)
+        if ext:
+            filename += ext
+    if not ext and link.url != resp.url:
+        ext = os.path.splitext(resp.url)[1]
+        if ext:
+            filename += ext
+    file_path = os.path.join(temp_dir, filename)
+    with open(file_path, 'wb') as content_file:
+        _download_url(resp, link, content_file, hashes, progress_bar)
+    return file_path, content_type
+
+
+def _check_download_dir(link, download_dir, hashes):
+    # type: (Link, str, Optional[Hashes]) -> Optional[str]
+    """ Check download_dir for previously downloaded file with correct hash
+        If a correct file is found return its path else None
+    """
+    download_path = os.path.join(download_dir, link.filename)
+    if os.path.exists(download_path):
+        # If already downloaded, does its hash match?
+        logger.info('File was already downloaded %s', download_path)
+        if hashes:
+            try:
+                hashes.check_against_path(download_path)
+            except HashMismatch:
+                logger.warning(
+                    'Previously-downloaded file %s has bad hash. '
+                    'Re-downloading.',
+                    download_path
+                )
+                os.unlink(download_path)
+                return None
+        return download_path
+    return None
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/exceptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/exceptions.py
new file mode 100644
index 00000000..096adcd6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/exceptions.py
@@ -0,0 +1,305 @@
+"""Exceptions used throughout package"""
+from __future__ import absolute_import
+
+from itertools import chain, groupby, repeat
+
+from pip._vendor.six import iteritems
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.req.req_install import InstallRequirement
+
+
+class PipError(Exception):
+    """Base pip exception"""
+
+
+class ConfigurationError(PipError):
+    """General exception in configuration"""
+
+
+class InstallationError(PipError):
+    """General exception during installation"""
+
+
+class UninstallationError(PipError):
+    """General exception during uninstallation"""
+
+
+class NoneMetadataError(PipError):
+    """
+    Raised when accessing "METADATA" or "PKG-INFO" metadata for a
+    pip._vendor.pkg_resources.Distribution object and
+    `dist.has_metadata('METADATA')` returns True but
+    `dist.get_metadata('METADATA')` returns None (and similarly for
+    "PKG-INFO").
+    """
+
+    def __init__(self, dist, metadata_name):
+        # type: (Distribution, str) -> None
+        """
+        :param dist: A Distribution object.
+        :param metadata_name: The name of the metadata being accessed
+            (can be "METADATA" or "PKG-INFO").
+        """
+        self.dist = dist
+        self.metadata_name = metadata_name
+
+    def __str__(self):
+        # type: () -> str
+        # Use `dist` in the error message because its stringification
+        # includes more information, like the version and location.
+        return (
+            'None {} metadata found for distribution: {}'.format(
+                self.metadata_name, self.dist,
+            )
+        )
+
+
+class DistributionNotFound(InstallationError):
+    """Raised when a distribution cannot be found to satisfy a requirement"""
+
+
+class RequirementsFileParseError(InstallationError):
+    """Raised when a general error occurs parsing a requirements file line."""
+
+
+class BestVersionAlreadyInstalled(PipError):
+    """Raised when the most up-to-date version of a package is already
+    installed."""
+
+
+class BadCommand(PipError):
+    """Raised when virtualenv or a command is not found"""
+
+
+class CommandError(PipError):
+    """Raised when there is an error in command-line arguments"""
+
+
+class PreviousBuildDirError(PipError):
+    """Raised when there's a previous conflicting build directory"""
+
+
+class InvalidWheelFilename(InstallationError):
+    """Invalid wheel filename."""
+
+
+class UnsupportedWheel(InstallationError):
+    """Unsupported wheel."""
+
+
+class HashErrors(InstallationError):
+    """Multiple HashError instances rolled into one for reporting"""
+
+    def __init__(self):
+        self.errors = []
+
+    def append(self, error):
+        self.errors.append(error)
+
+    def __str__(self):
+        lines = []
+        self.errors.sort(key=lambda e: e.order)
+        for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
+            lines.append(cls.head)
+            lines.extend(e.body() for e in errors_of_cls)
+        if lines:
+            return '\n'.join(lines)
+
+    def __nonzero__(self):
+        return bool(self.errors)
+
+    def __bool__(self):
+        return self.__nonzero__()
+
+
+class HashError(InstallationError):
+    """
+    A failure to verify a package against known-good hashes
+
+    :cvar order: An int sorting hash exception classes by difficulty of
+        recovery (lower being harder), so the user doesn't bother fretting
+        about unpinned packages when he has deeper issues, like VCS
+        dependencies, to deal with. Also keeps error reports in a
+        deterministic order.
+    :cvar head: A section heading for display above potentially many
+        exceptions of this kind
+    :ivar req: The InstallRequirement that triggered this error. This is
+        pasted on after the exception is instantiated, because it's not
+        typically available earlier.
+
+    """
+    req = None  # type: Optional[InstallRequirement]
+    head = ''
+
+    def body(self):
+        """Return a summary of me for display under the heading.
+
+        This default implementation simply prints a description of the
+        triggering requirement.
+
+        :param req: The InstallRequirement that provoked this error, with
+            populate_link() having already been called
+
+        """
+        return '    %s' % self._requirement_name()
+
+    def __str__(self):
+        return '%s\n%s' % (self.head, self.body())
+
+    def _requirement_name(self):
+        """Return a description of the requirement that triggered me.
+
+        This default implementation returns long description of the req, with
+        line numbers
+
+        """
+        return str(self.req) if self.req else 'unknown package'
+
+
+class VcsHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 0
+    head = ("Can't verify hashes for these requirements because we don't "
+            "have a way to hash version control repositories:")
+
+
+class DirectoryUrlHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 1
+    head = ("Can't verify hashes for these file:// requirements because they "
+            "point to directories:")
+
+
+class HashMissing(HashError):
+    """A hash was needed for a requirement but is absent."""
+
+    order = 2
+    head = ('Hashes are required in --require-hashes mode, but they are '
+            'missing from some requirements. Here is a list of those '
+            'requirements along with the hashes their downloaded archives '
+            'actually had. Add lines like these to your requirements files to '
+            'prevent tampering. (If you did not enable --require-hashes '
+            'manually, note that it turns on automatically when any package '
+            'has a hash.)')
+
+    def __init__(self, gotten_hash):
+        """
+        :param gotten_hash: The hash of the (possibly malicious) archive we
+            just downloaded
+        """
+        self.gotten_hash = gotten_hash
+
+    def body(self):
+        # Dodge circular import.
+        from pip._internal.utils.hashes import FAVORITE_HASH
+
+        package = None
+        if self.req:
+            # In the case of URL-based requirements, display the original URL
+            # seen in the requirements file rather than the package name,
+            # so the output can be directly copied into the requirements file.
+            package = (self.req.original_link if self.req.original_link
+                       # In case someone feeds something downright stupid
+                       # to InstallRequirement's constructor.
+                       else getattr(self.req, 'req', None))
+        return '    %s --hash=%s:%s' % (package or 'unknown package',
+                                        FAVORITE_HASH,
+                                        self.gotten_hash)
+
+
+class HashUnpinned(HashError):
+    """A requirement had a hash specified but was not pinned to a specific
+    version."""
+
+    order = 3
+    head = ('In --require-hashes mode, all requirements must have their '
+            'versions pinned with ==. These do not:')
+
+
+class HashMismatch(HashError):
+    """
+    Distribution file hash values don't match.
+
+    :ivar package_name: The name of the package that triggered the hash
+        mismatch. Feel free to write to this after the exception is raise to
+        improve its error message.
+
+    """
+    order = 4
+    head = ('THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
+            'FILE. If you have updated the package versions, please update '
+            'the hashes. Otherwise, examine the package contents carefully; '
+            'someone may have tampered with them.')
+
+    def __init__(self, allowed, gots):
+        """
+        :param allowed: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        :param gots: A dict of algorithm names pointing to hashes we
+            actually got from the files under suspicion
+        """
+        self.allowed = allowed
+        self.gots = gots
+
+    def body(self):
+        return '    %s:\n%s' % (self._requirement_name(),
+                                self._hash_comparison())
+
+    def _hash_comparison(self):
+        """
+        Return a comparison of actual and expected hash values.
+
+        Example::
+
+               Expected sha256 abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde
+                            or 123451234512345123451234512345123451234512345
+                    Got        bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef
+
+        """
+        def hash_then_or(hash_name):
+            # For now, all the decent hashes have 6-char names, so we can get
+            # away with hard-coding space literals.
+            return chain([hash_name], repeat('    or'))
+
+        lines = []
+        for hash_name, expecteds in iteritems(self.allowed):
+            prefix = hash_then_or(hash_name)
+            lines.extend(('        Expected %s %s' % (next(prefix), e))
+                         for e in expecteds)
+            lines.append('             Got        %s\n' %
+                         self.gots[hash_name].hexdigest())
+            prefix = '    or'
+        return '\n'.join(lines)
+
+
+class UnsupportedPythonVersion(InstallationError):
+    """Unsupported python version according to Requires-Python package
+    metadata."""
+
+
+class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
+    """When there are errors while loading a configuration file
+    """
+
+    def __init__(self, reason="could not be loaded", fname=None, error=None):
+        super(ConfigurationFileCouldNotBeLoaded, self).__init__(error)
+        self.reason = reason
+        self.fname = fname
+        self.error = error
+
+    def __str__(self):
+        if self.fname is not None:
+            message_part = " in {}.".format(self.fname)
+        else:
+            assert self.error is not None
+            message_part = ".\n{}\n".format(self.error.message)
+        return "Configuration file {}{}".format(self.reason, message_part)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/index.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/index.py
new file mode 100644
index 00000000..a1aaad59
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/index.py
@@ -0,0 +1,1508 @@
+"""Routines related to PyPI, indexes"""
+from __future__ import absolute_import
+
+import cgi
+import itertools
+import logging
+import mimetypes
+import os
+import re
+
+from pip._vendor import html5lib, requests, six
+from pip._vendor.distlib.compat import unescape
+from pip._vendor.packaging import specifiers
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.requests.exceptions import HTTPError, RetryError, SSLError
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+from pip._internal.download import is_url, url_to_path
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled, DistributionNotFound, InvalidWheelFilename,
+    UnsupportedWheel,
+)
+from pip._internal.models.candidate import InstallationCandidate
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.link import Link
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.utils.compat import ipaddress
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    ARCHIVE_EXTENSIONS, SUPPORTED_EXTENSIONS, WHEEL_EXTENSION, path_to_url,
+    redact_password_from_url,
+)
+from pip._internal.utils.packaging import check_requires_python
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.wheel import Wheel
+
+if MYPY_CHECK_RUNNING:
+    from logging import Logger
+    from typing import (
+        Any, Callable, FrozenSet, Iterable, Iterator, List, MutableMapping,
+        Optional, Sequence, Set, Text, Tuple, Union,
+    )
+    import xml.etree.ElementTree
+    from pip._vendor.packaging.version import _BaseVersion
+    from pip._vendor.requests import Response
+    from pip._internal.models.search_scope import SearchScope
+    from pip._internal.req import InstallRequirement
+    from pip._internal.download import PipSession
+    from pip._internal.pep425tags import Pep425Tag
+    from pip._internal.utils.hashes import Hashes
+
+    BuildTag = Tuple[Any, ...]  # either empty tuple or Tuple[int, str]
+    CandidateSortingKey = (
+        Tuple[int, int, int, _BaseVersion, BuildTag, Optional[int]]
+    )
+    HTMLElement = xml.etree.ElementTree.Element
+    SecureOrigin = Tuple[str, str, Optional[str]]
+
+
+__all__ = ['FormatControl', 'FoundCandidates', 'PackageFinder']
+
+
+SECURE_ORIGINS = [
+    # protocol, hostname, port
+    # Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC)
+    ("https", "*", "*"),
+    ("*", "localhost", "*"),
+    ("*", "127.0.0.0/8", "*"),
+    ("*", "::1/128", "*"),
+    ("file", "*", None),
+    # ssh is always secure.
+    ("ssh", "*", "*"),
+]  # type: List[SecureOrigin]
+
+
+logger = logging.getLogger(__name__)
+
+
+def _match_vcs_scheme(url):
+    # type: (str) -> Optional[str]
+    """Look for VCS schemes in the URL.
+
+    Returns the matched VCS scheme, or None if there's no match.
+    """
+    from pip._internal.vcs import vcs
+    for scheme in vcs.schemes:
+        if url.lower().startswith(scheme) and url[len(scheme)] in '+:':
+            return scheme
+    return None
+
+
+def _is_url_like_archive(url):
+    # type: (str) -> bool
+    """Return whether the URL looks like an archive.
+    """
+    filename = Link(url).filename
+    for bad_ext in ARCHIVE_EXTENSIONS:
+        if filename.endswith(bad_ext):
+            return True
+    return False
+
+
+class _NotHTML(Exception):
+    def __init__(self, content_type, request_desc):
+        # type: (str, str) -> None
+        super(_NotHTML, self).__init__(content_type, request_desc)
+        self.content_type = content_type
+        self.request_desc = request_desc
+
+
+def _ensure_html_header(response):
+    # type: (Response) -> None
+    """Check the Content-Type header to ensure the response contains HTML.
+
+    Raises `_NotHTML` if the content type is not text/html.
+    """
+    content_type = response.headers.get("Content-Type", "")
+    if not content_type.lower().startswith("text/html"):
+        raise _NotHTML(content_type, response.request.method)
+
+
+class _NotHTTP(Exception):
+    pass
+
+
+def _ensure_html_response(url, session):
+    # type: (str, PipSession) -> None
+    """Send a HEAD request to the URL, and ensure the response contains HTML.
+
+    Raises `_NotHTTP` if the URL is not available for a HEAD request, or
+    `_NotHTML` if the content type is not text/html.
+    """
+    scheme, netloc, path, query, fragment = urllib_parse.urlsplit(url)
+    if scheme not in {'http', 'https'}:
+        raise _NotHTTP()
+
+    resp = session.head(url, allow_redirects=True)
+    resp.raise_for_status()
+
+    _ensure_html_header(resp)
+
+
+def _get_html_response(url, session):
+    # type: (str, PipSession) -> Response
+    """Access an HTML page with GET, and return the response.
+
+    This consists of three parts:
+
+    1. If the URL looks suspiciously like an archive, send a HEAD first to
+       check the Content-Type is HTML, to avoid downloading a large file.
+       Raise `_NotHTTP` if the content type cannot be determined, or
+       `_NotHTML` if it is not HTML.
+    2. Actually perform the request. Raise HTTP exceptions on network failures.
+    3. Check the Content-Type header to make sure we got HTML, and raise
+       `_NotHTML` otherwise.
+    """
+    if _is_url_like_archive(url):
+        _ensure_html_response(url, session=session)
+
+    logger.debug('Getting page %s', redact_password_from_url(url))
+
+    resp = session.get(
+        url,
+        headers={
+            "Accept": "text/html",
+            # We don't want to blindly returned cached data for
+            # /simple/, because authors generally expecting that
+            # twine upload && pip install will function, but if
+            # they've done a pip install in the last ~10 minutes
+            # it won't. Thus by setting this to zero we will not
+            # blindly use any cached data, however the benefit of
+            # using max-age=0 instead of no-cache, is that we will
+            # still support conditional requests, so we will still
+            # minimize traffic sent in cases where the page hasn't
+            # changed at all, we will just always incur the round
+            # trip for the conditional GET now instead of only
+            # once per 10 minutes.
+            # For more information, please see pypa/pip#5670.
+            "Cache-Control": "max-age=0",
+        },
+    )
+    resp.raise_for_status()
+
+    # The check for archives above only works if the url ends with
+    # something that looks like an archive. However that is not a
+    # requirement of an url. Unless we issue a HEAD request on every
+    # url we cannot know ahead of time for sure if something is HTML
+    # or not. However we can check after we've downloaded it.
+    _ensure_html_header(resp)
+
+    return resp
+
+
+def _handle_get_page_fail(
+    link,  # type: Link
+    reason,  # type: Union[str, Exception]
+    meth=None  # type: Optional[Callable[..., None]]
+):
+    # type: (...) -> None
+    if meth is None:
+        meth = logger.debug
+    meth("Could not fetch URL %s: %s - skipping", link, reason)
+
+
+def _get_html_page(link, session=None):
+    # type: (Link, Optional[PipSession]) -> Optional[HTMLPage]
+    if session is None:
+        raise TypeError(
+            "_get_html_page() missing 1 required keyword argument: 'session'"
+        )
+
+    url = link.url.split('#', 1)[0]
+
+    # Check for VCS schemes that do not support lookup as web pages.
+    vcs_scheme = _match_vcs_scheme(url)
+    if vcs_scheme:
+        logger.debug('Cannot look at %s URL %s', vcs_scheme, link)
+        return None
+
+    # Tack index.html onto file:// URLs that point to directories
+    scheme, _, path, _, _, _ = urllib_parse.urlparse(url)
+    if (scheme == 'file' and os.path.isdir(urllib_request.url2pathname(path))):
+        # add trailing slash if not present so urljoin doesn't trim
+        # final segment
+        if not url.endswith('/'):
+            url += '/'
+        url = urllib_parse.urljoin(url, 'index.html')
+        logger.debug(' file: URL is directory, getting %s', url)
+
+    try:
+        resp = _get_html_response(url, session=session)
+    except _NotHTTP:
+        logger.debug(
+            'Skipping page %s because it looks like an archive, and cannot '
+            'be checked by HEAD.', link,
+        )
+    except _NotHTML as exc:
+        logger.debug(
+            'Skipping page %s because the %s request got Content-Type: %s',
+            link, exc.request_desc, exc.content_type,
+        )
+    except HTTPError as exc:
+        _handle_get_page_fail(link, exc)
+    except RetryError as exc:
+        _handle_get_page_fail(link, exc)
+    except SSLError as exc:
+        reason = "There was a problem confirming the ssl certificate: "
+        reason += str(exc)
+        _handle_get_page_fail(link, reason, meth=logger.info)
+    except requests.ConnectionError as exc:
+        _handle_get_page_fail(link, "connection error: %s" % exc)
+    except requests.Timeout:
+        _handle_get_page_fail(link, "timed out")
+    else:
+        return HTMLPage(resp.content, resp.url, resp.headers)
+    return None
+
+
+def _check_link_requires_python(
+    link,  # type: Link
+    version_info,  # type: Tuple[int, int, int]
+    ignore_requires_python=False,  # type: bool
+):
+    # type: (...) -> bool
+    """
+    Return whether the given Python version is compatible with a link's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+    """
+    try:
+        is_compatible = check_requires_python(
+            link.requires_python, version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier:
+        logger.debug(
+            "Ignoring invalid Requires-Python (%r) for link: %s",
+            link.requires_python, link,
+        )
+    else:
+        if not is_compatible:
+            version = '.'.join(map(str, version_info))
+            if not ignore_requires_python:
+                logger.debug(
+                    'Link requires a different Python (%s not in: %r): %s',
+                    version, link.requires_python, link,
+                )
+                return False
+
+            logger.debug(
+                'Ignoring failed Requires-Python check (%s not in: %r) '
+                'for link: %s',
+                version, link.requires_python, link,
+            )
+
+    return True
+
+
+class LinkEvaluator(object):
+
+    """
+    Responsible for evaluating links for a particular project.
+    """
+
+    _py_version_re = re.compile(r'-py([123]\.?[0-9]?)$')
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        project_name,    # type: str
+        canonical_name,  # type: str
+        formats,         # type: FrozenSet
+        target_python,   # type: TargetPython
+        allow_yanked,    # type: bool
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """
+        :param project_name: The user supplied package name.
+        :param canonical_name: The canonical package name.
+        :param formats: The formats allowed for this package. Should be a set
+            with 'binary' or 'source' or both in it.
+        :param target_python: The target Python interpreter to use when
+            evaluating link compatibility. This is used, for example, to
+            check wheel compatibility, as well as when checking the Python
+            version, e.g. the Python version embedded in a link filename
+            (or egg fragment) and against an HTML link's optional PEP 503
+            "data-requires-python" attribute.
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param ignore_requires_python: Whether to ignore incompatible
+            PEP 503 "data-requires-python" values in HTML links. Defaults
+            to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self._allow_yanked = allow_yanked
+        self._canonical_name = canonical_name
+        self._ignore_requires_python = ignore_requires_python
+        self._formats = formats
+        self._target_python = target_python
+
+        self.project_name = project_name
+
+    def evaluate_link(self, link):
+        # type: (Link) -> Tuple[bool, Optional[Text]]
+        """
+        Determine whether a link is a candidate for installation.
+
+        :return: A tuple (is_candidate, result), where `result` is (1) a
+            version string if `is_candidate` is True, and (2) if
+            `is_candidate` is False, an optional string to log the reason
+            the link fails to qualify.
+        """
+        version = None
+        if link.is_yanked and not self._allow_yanked:
+            reason = link.yanked_reason or '<none given>'
+            # Mark this as a unicode string to prevent "UnicodeEncodeError:
+            # 'ascii' codec can't encode character" in Python 2 when
+            # the reason contains non-ascii characters.
+            return (False, u'yanked for reason: {}'.format(reason))
+
+        if link.egg_fragment:
+            egg_info = link.egg_fragment
+            ext = link.ext
+        else:
+            egg_info, ext = link.splitext()
+            if not ext:
+                return (False, 'not a file')
+            if ext not in SUPPORTED_EXTENSIONS:
+                return (False, 'unsupported archive format: %s' % ext)
+            if "binary" not in self._formats and ext == WHEEL_EXTENSION:
+                reason = 'No binaries permitted for %s' % self.project_name
+                return (False, reason)
+            if "macosx10" in link.path and ext == '.zip':
+                return (False, 'macosx10 one')
+            if ext == WHEEL_EXTENSION:
+                try:
+                    wheel = Wheel(link.filename)
+                except InvalidWheelFilename:
+                    return (False, 'invalid wheel filename')
+                if canonicalize_name(wheel.name) != self._canonical_name:
+                    reason = 'wrong project name (not %s)' % self.project_name
+                    return (False, reason)
+
+                supported_tags = self._target_python.get_tags()
+                if not wheel.supported(supported_tags):
+                    # Include the wheel's tags in the reason string to
+                    # simplify troubleshooting compatibility issues.
+                    file_tags = wheel.get_formatted_file_tags()
+                    reason = (
+                        "none of the wheel's tags match: {}".format(
+                            ', '.join(file_tags)
+                        )
+                    )
+                    return (False, reason)
+
+                version = wheel.version
+
+        # This should be up by the self.ok_binary check, but see issue 2700.
+        if "source" not in self._formats and ext != WHEEL_EXTENSION:
+            return (False, 'No sources permitted for %s' % self.project_name)
+
+        if not version:
+            version = _extract_version_from_fragment(
+                egg_info, self._canonical_name,
+            )
+        if not version:
+            return (
+                False, 'Missing project version for %s' % self.project_name,
+            )
+
+        match = self._py_version_re.search(version)
+        if match:
+            version = version[:match.start()]
+            py_version = match.group(1)
+            if py_version != self._target_python.py_version:
+                return (False, 'Python version is incorrect')
+
+        supports_python = _check_link_requires_python(
+            link, version_info=self._target_python.py_version_info,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+        if not supports_python:
+            # Return None for the reason text to suppress calling
+            # _log_skipped_link().
+            return (False, None)
+
+        logger.debug('Found link %s, version: %s', link, version)
+
+        return (True, version)
+
+
+def filter_unallowed_hashes(
+    candidates,    # type: List[InstallationCandidate]
+    hashes,        # type: Hashes
+    project_name,  # type: str
+):
+    # type: (...) -> List[InstallationCandidate]
+    """
+    Filter out candidates whose hashes aren't allowed, and return a new
+    list of candidates.
+
+    If at least one candidate has an allowed hash, then all candidates with
+    either an allowed hash or no hash specified are returned.  Otherwise,
+    the given candidates are returned.
+
+    Including the candidates with no hash specified when there is a match
+    allows a warning to be logged if there is a more preferred candidate
+    with no hash specified.  Returning all candidates in the case of no
+    matches lets pip report the hash of the candidate that would otherwise
+    have been installed (e.g. permitting the user to more easily update
+    their requirements file with the desired hash).
+    """
+    if not hashes:
+        logger.debug(
+            'Given no hashes to check %s links for project %r: '
+            'discarding no candidates',
+            len(candidates),
+            project_name,
+        )
+        # Make sure we're not returning back the given value.
+        return list(candidates)
+
+    matches_or_no_digest = []
+    # Collect the non-matches for logging purposes.
+    non_matches = []
+    match_count = 0
+    for candidate in candidates:
+        link = candidate.link
+        if not link.has_hash:
+            pass
+        elif link.is_hash_allowed(hashes=hashes):
+            match_count += 1
+        else:
+            non_matches.append(candidate)
+            continue
+
+        matches_or_no_digest.append(candidate)
+
+    if match_count:
+        filtered = matches_or_no_digest
+    else:
+        # Make sure we're not returning back the given value.
+        filtered = list(candidates)
+
+    if len(filtered) == len(candidates):
+        discard_message = 'discarding no candidates'
+    else:
+        discard_message = 'discarding {} non-matches:\n  {}'.format(
+            len(non_matches),
+            '\n  '.join(str(candidate.link) for candidate in non_matches)
+        )
+
+    logger.debug(
+        'Checked %s links for project %r against %s hashes '
+        '(%s matches, %s no digest): %s',
+        len(candidates),
+        project_name,
+        hashes.digest_count,
+        match_count,
+        len(matches_or_no_digest) - match_count,
+        discard_message
+    )
+
+    return filtered
+
+
+class CandidatePreferences(object):
+
+    """
+    Encapsulates some of the preferences for filtering and sorting
+    InstallationCandidate objects.
+    """
+
+    def __init__(
+        self,
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+    ):
+        # type: (...) -> None
+        """
+        :param allow_all_prereleases: Whether to allow all pre-releases.
+        """
+        self.allow_all_prereleases = allow_all_prereleases
+        self.prefer_binary = prefer_binary
+
+
+class CandidateEvaluator(object):
+
+    """
+    Responsible for filtering and sorting candidates for installation based
+    on what tags are valid.
+    """
+
+    @classmethod
+    def create(
+        cls,
+        project_name,         # type: str
+        target_python=None,   # type: Optional[TargetPython]
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        specifier=None,       # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,          # type: Optional[Hashes]
+    ):
+        # type: (...) -> CandidateEvaluator
+        """Create a CandidateEvaluator object.
+
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        :param hashes: An optional collection of allowed hashes.
+        """
+        if target_python is None:
+            target_python = TargetPython()
+        if specifier is None:
+            specifier = specifiers.SpecifierSet()
+
+        supported_tags = target_python.get_tags()
+
+        return cls(
+            project_name=project_name,
+            supported_tags=supported_tags,
+            specifier=specifier,
+            prefer_binary=prefer_binary,
+            allow_all_prereleases=allow_all_prereleases,
+            hashes=hashes,
+        )
+
+    def __init__(
+        self,
+        project_name,         # type: str
+        supported_tags,       # type: List[Pep425Tag]
+        specifier,            # type: specifiers.BaseSpecifier
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        hashes=None,                  # type: Optional[Hashes]
+    ):
+        # type: (...) -> None
+        """
+        :param supported_tags: The PEP 425 tags supported by the target
+            Python in order of preference (most preferred first).
+        """
+        self._allow_all_prereleases = allow_all_prereleases
+        self._hashes = hashes
+        self._prefer_binary = prefer_binary
+        self._project_name = project_name
+        self._specifier = specifier
+        self._supported_tags = supported_tags
+
+    def get_applicable_candidates(
+        self,
+        candidates,  # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> List[InstallationCandidate]
+        """
+        Return the applicable candidates from a list of candidates.
+        """
+        # Using None infers from the specifier instead.
+        allow_prereleases = self._allow_all_prereleases or None
+        specifier = self._specifier
+        versions = {
+            str(v) for v in specifier.filter(
+                # We turn the version object into a str here because otherwise
+                # when we're debundled but setuptools isn't, Python will see
+                # packaging.version.Version and
+                # pkg_resources._vendor.packaging.version.Version as different
+                # types. This way we'll use a str as a common data interchange
+                # format. If we stop using the pkg_resources provided specifier
+                # and start using our own, we can drop the cast to str().
+                (str(c.version) for c in candidates),
+                prereleases=allow_prereleases,
+            )
+        }
+
+        # Again, converting version to str to deal with debundling.
+        applicable_candidates = [
+            c for c in candidates if str(c.version) in versions
+        ]
+
+        return filter_unallowed_hashes(
+            candidates=applicable_candidates,
+            hashes=self._hashes,
+            project_name=self._project_name,
+        )
+
+    def make_found_candidates(
+        self,
+        candidates,      # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> FoundCandidates
+        """
+        Create and return a `FoundCandidates` instance.
+
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+        """
+        applicable_candidates = self.get_applicable_candidates(candidates)
+
+        return FoundCandidates(
+            candidates,
+            applicable_candidates=applicable_candidates,
+            evaluator=self,
+        )
+
+    def _sort_key(self, candidate):
+        # type: (InstallationCandidate) -> CandidateSortingKey
+        """
+        Function to pass as the `key` argument to a call to sorted() to sort
+        InstallationCandidates by preference.
+
+        Returns a tuple such that tuples sorting as greater using Python's
+        default comparison operator are more preferred.
+
+        The preference is as follows:
+
+        First and foremost, candidates with allowed (matching) hashes are
+        always preferred over candidates without matching hashes. This is
+        because e.g. if the only candidate with an allowed hash is yanked,
+        we still want to use that candidate.
+
+        Second, excepting hash considerations, candidates that have been
+        yanked (in the sense of PEP 592) are always less preferred than
+        candidates that haven't been yanked. Then:
+
+        If not finding wheels, they are sorted by version only.
+        If finding wheels, then the sort order is by version, then:
+          1. existing installs
+          2. wheels ordered via Wheel.support_index_min(self._supported_tags)
+          3. source archives
+        If prefer_binary was set, then all wheels are sorted above sources.
+
+        Note: it was considered to embed this logic into the Link
+              comparison operators, but then different sdist links
+              with the same version, would have to be considered equal
+        """
+        valid_tags = self._supported_tags
+        support_num = len(valid_tags)
+        build_tag = tuple()  # type: BuildTag
+        binary_preference = 0
+        link = candidate.link
+        if link.is_wheel:
+            # can raise InvalidWheelFilename
+            wheel = Wheel(link.filename)
+            if not wheel.supported(valid_tags):
+                raise UnsupportedWheel(
+                    "%s is not a supported wheel for this platform. It "
+                    "can't be sorted." % wheel.filename
+                )
+            if self._prefer_binary:
+                binary_preference = 1
+            pri = -(wheel.support_index_min(valid_tags))
+            if wheel.build_tag is not None:
+                match = re.match(r'^(\d+)(.*)$', wheel.build_tag)
+                build_tag_groups = match.groups()
+                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
+        else:  # sdist
+            pri = -(support_num)
+        has_allowed_hash = int(link.is_hash_allowed(self._hashes))
+        yank_value = -1 * int(link.is_yanked)  # -1 for yanked.
+        return (
+            has_allowed_hash, yank_value, binary_preference, candidate.version,
+            build_tag, pri,
+        )
+
+    def get_best_candidate(
+        self,
+        candidates,    # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> Optional[InstallationCandidate]
+        """
+        Return the best candidate per the instance's sort order, or None if
+        no candidate is acceptable.
+        """
+        if not candidates:
+            return None
+
+        best_candidate = max(candidates, key=self._sort_key)
+
+        # Log a warning per PEP 592 if necessary before returning.
+        link = best_candidate.link
+        if link.is_yanked:
+            reason = link.yanked_reason or '<none given>'
+            msg = (
+                # Mark this as a unicode string to prevent
+                # "UnicodeEncodeError: 'ascii' codec can't encode character"
+                # in Python 2 when the reason contains non-ascii characters.
+                u'The candidate selected for download or install is a '
+                'yanked version: {candidate}\n'
+                'Reason for being yanked: {reason}'
+            ).format(candidate=best_candidate, reason=reason)
+            logger.warning(msg)
+
+        return best_candidate
+
+
+class FoundCandidates(object):
+    """A collection of candidates, returned by `PackageFinder.find_candidates`.
+
+    This class is only intended to be instantiated by CandidateEvaluator's
+    `make_found_candidates()` method.
+    """
+
+    def __init__(
+        self,
+        candidates,             # type: List[InstallationCandidate]
+        applicable_candidates,  # type: List[InstallationCandidate]
+        evaluator,              # type: CandidateEvaluator
+    ):
+        # type: (...) -> None
+        """
+        :param candidates: A sequence of all available candidates found.
+        :param applicable_candidates: The applicable candidates.
+        :param evaluator: A CandidateEvaluator object to sort applicable
+            candidates by order of preference.
+        """
+        self._applicable_candidates = applicable_candidates
+        self._candidates = candidates
+        self._evaluator = evaluator
+
+    def iter_all(self):
+        # type: () -> Iterable[InstallationCandidate]
+        """Iterate through all candidates.
+        """
+        return iter(self._candidates)
+
+    def iter_applicable(self):
+        # type: () -> Iterable[InstallationCandidate]
+        """Iterate through the applicable candidates.
+        """
+        return iter(self._applicable_candidates)
+
+    def get_best(self):
+        # type: () -> Optional[InstallationCandidate]
+        """Return the best candidate available, or None if no applicable
+        candidates are found.
+        """
+        candidates = list(self.iter_applicable())
+        return self._evaluator.get_best_candidate(candidates)
+
+
+class PackageFinder(object):
+    """This finds packages.
+
+    This is meant to match easy_install's technique for looking for
+    packages, by reading pages and looking for appropriate links.
+    """
+
+    def __init__(
+        self,
+        search_scope,         # type: SearchScope
+        session,  # type: PipSession
+        target_python,        # type: TargetPython
+        allow_yanked,         # type: bool
+        format_control=None,  # type: Optional[FormatControl]
+        trusted_hosts=None,   # type: Optional[List[str]]
+        candidate_prefs=None,         # type: CandidatePreferences
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """
+        This constructor is primarily meant to be used by the create() class
+        method and from tests.
+
+        :param session: The Session to use to make requests.
+        :param format_control: A FormatControl object, used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param candidate_prefs: Options to use when creating a
+            CandidateEvaluator object.
+        """
+        if trusted_hosts is None:
+            trusted_hosts = []
+        if candidate_prefs is None:
+            candidate_prefs = CandidatePreferences()
+
+        format_control = format_control or FormatControl(set(), set())
+
+        self._allow_yanked = allow_yanked
+        self._candidate_prefs = candidate_prefs
+        self._ignore_requires_python = ignore_requires_python
+        self._target_python = target_python
+
+        self.search_scope = search_scope
+        self.session = session
+        self.format_control = format_control
+        self.trusted_hosts = trusted_hosts
+
+        # These are boring links that have already been logged somehow.
+        self._logged_links = set()  # type: Set[Link]
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    @classmethod
+    def create(
+        cls,
+        search_scope,  # type: SearchScope
+        selection_prefs,     # type: SelectionPreferences
+        trusted_hosts=None,  # type: Optional[List[str]]
+        session=None,        # type: Optional[PipSession]
+        target_python=None,  # type: Optional[TargetPython]
+    ):
+        # type: (...) -> PackageFinder
+        """Create a PackageFinder.
+
+        :param selection_prefs: The candidate selection preferences, as a
+            SelectionPreferences object.
+        :param trusted_hosts: Domains not to emit warnings for when not using
+            HTTPS.
+        :param session: The Session to use to make requests.
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        """
+        if session is None:
+            raise TypeError(
+                "PackageFinder.create() missing 1 required keyword argument: "
+                "'session'"
+            )
+        if target_python is None:
+            target_python = TargetPython()
+
+        candidate_prefs = CandidatePreferences(
+            prefer_binary=selection_prefs.prefer_binary,
+            allow_all_prereleases=selection_prefs.allow_all_prereleases,
+        )
+
+        return cls(
+            candidate_prefs=candidate_prefs,
+            search_scope=search_scope,
+            session=session,
+            target_python=target_python,
+            allow_yanked=selection_prefs.allow_yanked,
+            format_control=selection_prefs.format_control,
+            trusted_hosts=trusted_hosts,
+            ignore_requires_python=selection_prefs.ignore_requires_python,
+        )
+
+    @property
+    def find_links(self):
+        # type: () -> List[str]
+        return self.search_scope.find_links
+
+    @property
+    def index_urls(self):
+        # type: () -> List[str]
+        return self.search_scope.index_urls
+
+    @property
+    def allow_all_prereleases(self):
+        # type: () -> bool
+        return self._candidate_prefs.allow_all_prereleases
+
+    def set_allow_all_prereleases(self):
+        # type: () -> None
+        self._candidate_prefs.allow_all_prereleases = True
+
+    def add_trusted_host(self, host, source=None):
+        # type: (str, Optional[str]) -> None
+        """
+        :param source: An optional source string, for logging where the host
+            string came from.
+        """
+        # It is okay to add a previously added host because PipSession stores
+        # the resulting prefixes in a dict.
+        msg = 'adding trusted host: {!r}'.format(host)
+        if source is not None:
+            msg += ' (from {})'.format(source)
+        logger.info(msg)
+        self.session.add_insecure_host(host)
+        if host in self.trusted_hosts:
+            return
+
+        self.trusted_hosts.append(host)
+
+    def iter_secure_origins(self):
+        # type: () -> Iterator[SecureOrigin]
+        for secure_origin in SECURE_ORIGINS:
+            yield secure_origin
+        for host in self.trusted_hosts:
+            yield ('*', host, '*')
+
+    @staticmethod
+    def _sort_locations(locations, expand_dir=False):
+        # type: (Sequence[str], bool) -> Tuple[List[str], List[str]]
+        """
+        Sort locations into "files" (archives) and "urls", and return
+        a pair of lists (files,urls)
+        """
+        files = []
+        urls = []
+
+        # puts the url for the given file path into the appropriate list
+        def sort_path(path):
+            url = path_to_url(path)
+            if mimetypes.guess_type(url, strict=False)[0] == 'text/html':
+                urls.append(url)
+            else:
+                files.append(url)
+
+        for url in locations:
+
+            is_local_path = os.path.exists(url)
+            is_file_url = url.startswith('file:')
+
+            if is_local_path or is_file_url:
+                if is_local_path:
+                    path = url
+                else:
+                    path = url_to_path(url)
+                if os.path.isdir(path):
+                    if expand_dir:
+                        path = os.path.realpath(path)
+                        for item in os.listdir(path):
+                            sort_path(os.path.join(path, item))
+                    elif is_file_url:
+                        urls.append(url)
+                    else:
+                        logger.warning(
+                            "Path '{0}' is ignored: "
+                            "it is a directory.".format(path),
+                        )
+                elif os.path.isfile(path):
+                    sort_path(path)
+                else:
+                    logger.warning(
+                        "Url '%s' is ignored: it is neither a file "
+                        "nor a directory.", url,
+                    )
+            elif is_url(url):
+                # Only add url with clear scheme
+                urls.append(url)
+            else:
+                logger.warning(
+                    "Url '%s' is ignored. It is either a non-existing "
+                    "path or lacks a specific scheme.", url,
+                )
+
+        return files, urls
+
+    def _validate_secure_origin(self, logger, location):
+        # type: (Logger, Link) -> bool
+        # Determine if this url used a secure transport mechanism
+        parsed = urllib_parse.urlparse(str(location))
+        origin = (parsed.scheme, parsed.hostname, parsed.port)
+
+        # The protocol to use to see if the protocol matches.
+        # Don't count the repository type as part of the protocol: in
+        # cases such as "git+ssh", only use "ssh". (I.e., Only verify against
+        # the last scheme.)
+        protocol = origin[0].rsplit('+', 1)[-1]
+
+        # Determine if our origin is a secure origin by looking through our
+        # hardcoded list of secure origins, as well as any additional ones
+        # configured on this PackageFinder instance.
+        for secure_origin in self.iter_secure_origins():
+            if protocol != secure_origin[0] and secure_origin[0] != "*":
+                continue
+
+            try:
+                # We need to do this decode dance to ensure that we have a
+                # unicode object, even on Python 2.x.
+                addr = ipaddress.ip_address(
+                    origin[1]
+                    if (
+                        isinstance(origin[1], six.text_type) or
+                        origin[1] is None
+                    )
+                    else origin[1].decode("utf8")
+                )
+                network = ipaddress.ip_network(
+                    secure_origin[1]
+                    if isinstance(secure_origin[1], six.text_type)
+                    # setting secure_origin[1] to proper Union[bytes, str]
+                    # creates problems in other places
+                    else secure_origin[1].decode("utf8")  # type: ignore
+                )
+            except ValueError:
+                # We don't have both a valid address or a valid network, so
+                # we'll check this origin against hostnames.
+                if (origin[1] and
+                        origin[1].lower() != secure_origin[1].lower() and
+                        secure_origin[1] != "*"):
+                    continue
+            else:
+                # We have a valid address and network, so see if the address
+                # is contained within the network.
+                if addr not in network:
+                    continue
+
+            # Check to see if the port patches
+            if (origin[2] != secure_origin[2] and
+                    secure_origin[2] != "*" and
+                    secure_origin[2] is not None):
+                continue
+
+            # If we've gotten here, then this origin matches the current
+            # secure origin and we should return True
+            return True
+
+        # If we've gotten to this point, then the origin isn't secure and we
+        # will not accept it as a valid location to search. We will however
+        # log a warning that we are ignoring it.
+        logger.warning(
+            "The repository located at %s is not a trusted or secure host and "
+            "is being ignored. If this repository is available via HTTPS we "
+            "recommend you use HTTPS instead, otherwise you may silence "
+            "this warning and allow it anyway with '--trusted-host %s'.",
+            parsed.hostname,
+            parsed.hostname,
+        )
+
+        return False
+
+    def make_link_evaluator(self, project_name):
+        # type: (str) -> LinkEvaluator
+        canonical_name = canonicalize_name(project_name)
+        formats = self.format_control.get_allowed_formats(canonical_name)
+
+        return LinkEvaluator(
+            project_name=project_name,
+            canonical_name=canonical_name,
+            formats=formats,
+            target_python=self._target_python,
+            allow_yanked=self._allow_yanked,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+
+    def find_all_candidates(self, project_name):
+        # type: (str) -> List[InstallationCandidate]
+        """Find all available InstallationCandidate for project_name
+
+        This checks index_urls and find_links.
+        All versions found are returned as an InstallationCandidate list.
+
+        See LinkEvaluator.evaluate_link() for details on which files
+        are accepted.
+        """
+        search_scope = self.search_scope
+        index_locations = search_scope.get_index_urls_locations(project_name)
+        index_file_loc, index_url_loc = self._sort_locations(index_locations)
+        fl_file_loc, fl_url_loc = self._sort_locations(
+            self.find_links, expand_dir=True,
+        )
+
+        file_locations = (Link(url) for url in itertools.chain(
+            index_file_loc, fl_file_loc,
+        ))
+
+        # We trust every url that the user has given us whether it was given
+        #   via --index-url or --find-links.
+        # We want to filter out any thing which does not have a secure origin.
+        url_locations = [
+            link for link in itertools.chain(
+                (Link(url) for url in index_url_loc),
+                (Link(url) for url in fl_url_loc),
+            )
+            if self._validate_secure_origin(logger, link)
+        ]
+
+        logger.debug('%d location(s) to search for versions of %s:',
+                     len(url_locations), project_name)
+
+        for location in url_locations:
+            logger.debug('* %s', location)
+
+        link_evaluator = self.make_link_evaluator(project_name)
+        find_links_versions = self._package_versions(
+            link_evaluator,
+            # We trust every directly linked archive in find_links
+            (Link(url, '-f') for url in self.find_links),
+        )
+
+        page_versions = []
+        for page in self._get_pages(url_locations, project_name):
+            logger.debug('Analyzing links from page %s', page.url)
+            with indent_log():
+                page_versions.extend(
+                    self._package_versions(link_evaluator, page.iter_links())
+                )
+
+        file_versions = self._package_versions(link_evaluator, file_locations)
+        if file_versions:
+            file_versions.sort(reverse=True)
+            logger.debug(
+                'Local files found: %s',
+                ', '.join([
+                    url_to_path(candidate.link.url)
+                    for candidate in file_versions
+                ])
+            )
+
+        # This is an intentional priority ordering
+        return file_versions + find_links_versions + page_versions
+
+    def make_candidate_evaluator(
+        self,
+        project_name,    # type: str
+        specifier=None,  # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,     # type: Optional[Hashes]
+    ):
+        # type: (...) -> CandidateEvaluator
+        """Create a CandidateEvaluator object to use.
+        """
+        candidate_prefs = self._candidate_prefs
+        return CandidateEvaluator.create(
+            project_name=project_name,
+            target_python=self._target_python,
+            prefer_binary=candidate_prefs.prefer_binary,
+            allow_all_prereleases=candidate_prefs.allow_all_prereleases,
+            specifier=specifier,
+            hashes=hashes,
+        )
+
+    def find_candidates(
+        self,
+        project_name,       # type: str
+        specifier=None,     # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,        # type: Optional[Hashes]
+    ):
+        # type: (...) -> FoundCandidates
+        """Find matches for the given project and specifier.
+
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+
+        :return: A `FoundCandidates` instance.
+        """
+        candidates = self.find_all_candidates(project_name)
+        candidate_evaluator = self.make_candidate_evaluator(
+            project_name=project_name,
+            specifier=specifier,
+            hashes=hashes,
+        )
+        return candidate_evaluator.make_found_candidates(candidates)
+
+    def find_requirement(self, req, upgrade):
+        # type: (InstallRequirement, bool) -> Optional[Link]
+        """Try to find a Link matching req
+
+        Expects req, an InstallRequirement and upgrade, a boolean
+        Returns a Link if found,
+        Raises DistributionNotFound or BestVersionAlreadyInstalled otherwise
+        """
+        hashes = req.hashes(trust_internet=False)
+        candidates = self.find_candidates(
+            req.name, specifier=req.specifier, hashes=hashes,
+        )
+        best_candidate = candidates.get_best()
+
+        installed_version = None    # type: Optional[_BaseVersion]
+        if req.satisfied_by is not None:
+            installed_version = parse_version(req.satisfied_by.version)
+
+        def _format_versions(cand_iter):
+            # This repeated parse_version and str() conversion is needed to
+            # handle different vendoring sources from pip and pkg_resources.
+            # If we stop using the pkg_resources provided specifier and start
+            # using our own, we can drop the cast to str().
+            return ", ".join(sorted(
+                {str(c.version) for c in cand_iter},
+                key=parse_version,
+            )) or "none"
+
+        if installed_version is None and best_candidate is None:
+            logger.critical(
+                'Could not find a version that satisfies the requirement %s '
+                '(from versions: %s)',
+                req,
+                _format_versions(candidates.iter_all()),
+            )
+
+            raise DistributionNotFound(
+                'No matching distribution found for %s' % req
+            )
+
+        best_installed = False
+        if installed_version and (
+                best_candidate is None or
+                best_candidate.version <= installed_version):
+            best_installed = True
+
+        if not upgrade and installed_version is not None:
+            if best_installed:
+                logger.debug(
+                    'Existing installed version (%s) is most up-to-date and '
+                    'satisfies requirement',
+                    installed_version,
+                )
+            else:
+                logger.debug(
+                    'Existing installed version (%s) satisfies requirement '
+                    '(most up-to-date version is %s)',
+                    installed_version,
+                    best_candidate.version,
+                )
+            return None
+
+        if best_installed:
+            # We have an existing version, and its the best version
+            logger.debug(
+                'Installed version (%s) is most up-to-date (past versions: '
+                '%s)',
+                installed_version,
+                _format_versions(candidates.iter_applicable()),
+            )
+            raise BestVersionAlreadyInstalled
+
+        logger.debug(
+            'Using version %s (newest of versions: %s)',
+            best_candidate.version,
+            _format_versions(candidates.iter_applicable()),
+        )
+        return best_candidate.link
+
+    def _get_pages(self, locations, project_name):
+        # type: (Iterable[Link], str) -> Iterable[HTMLPage]
+        """
+        Yields (page, page_url) from the given locations, skipping
+        locations that have errors.
+        """
+        seen = set()  # type: Set[Link]
+        for location in locations:
+            if location in seen:
+                continue
+            seen.add(location)
+
+            page = _get_html_page(location, session=self.session)
+            if page is None:
+                continue
+
+            yield page
+
+    def _sort_links(self, links):
+        # type: (Iterable[Link]) -> List[Link]
+        """
+        Returns elements of links in order, non-egg links first, egg links
+        second, while eliminating duplicates
+        """
+        eggs, no_eggs = [], []
+        seen = set()  # type: Set[Link]
+        for link in links:
+            if link not in seen:
+                seen.add(link)
+                if link.egg_fragment:
+                    eggs.append(link)
+                else:
+                    no_eggs.append(link)
+        return no_eggs + eggs
+
+    def _log_skipped_link(self, link, reason):
+        # type: (Link, Text) -> None
+        if link not in self._logged_links:
+            # Mark this as a unicode string to prevent "UnicodeEncodeError:
+            # 'ascii' codec can't encode character" in Python 2 when
+            # the reason contains non-ascii characters.
+            #   Also, put the link at the end so the reason is more visible
+            # and because the link string is usually very long.
+            logger.debug(u'Skipping link: %s: %s', reason, link)
+            self._logged_links.add(link)
+
+    def get_install_candidate(self, link_evaluator, link):
+        # type: (LinkEvaluator, Link) -> Optional[InstallationCandidate]
+        """
+        If the link is a candidate for install, convert it to an
+        InstallationCandidate and return it. Otherwise, return None.
+        """
+        is_candidate, result = link_evaluator.evaluate_link(link)
+        if not is_candidate:
+            if result:
+                self._log_skipped_link(link, reason=result)
+            return None
+
+        return InstallationCandidate(
+            project=link_evaluator.project_name,
+            link=link,
+            # Convert the Text result to str since InstallationCandidate
+            # accepts str.
+            version=str(result),
+        )
+
+    def _package_versions(self, link_evaluator, links):
+        # type: (LinkEvaluator, Iterable[Link]) -> List[InstallationCandidate]
+        result = []
+        for link in self._sort_links(links):
+            candidate = self.get_install_candidate(link_evaluator, link)
+            if candidate is not None:
+                result.append(candidate)
+        return result
+
+
+def _find_name_version_sep(fragment, canonical_name):
+    # type: (str, str) -> int
+    """Find the separator's index based on the package's canonical name.
+
+    :param fragment: A <package>+<version> filename "fragment" (stem) or
+        egg fragment.
+    :param canonical_name: The package's canonical name.
+
+    This function is needed since the canonicalized name does not necessarily
+    have the same length as the egg info's name part. An example::
+
+    >>> fragment = 'foo__bar-1.0'
+    >>> canonical_name = 'foo-bar'
+    >>> _find_name_version_sep(fragment, canonical_name)
+    8
+    """
+    # Project name and version must be separated by one single dash. Find all
+    # occurrences of dashes; if the string in front of it matches the canonical
+    # name, this is the one separating the name and version parts.
+    for i, c in enumerate(fragment):
+        if c != "-":
+            continue
+        if canonicalize_name(fragment[:i]) == canonical_name:
+            return i
+    raise ValueError("{} does not match {}".format(fragment, canonical_name))
+
+
+def _extract_version_from_fragment(fragment, canonical_name):
+    # type: (str, str) -> Optional[str]
+    """Parse the version string from a <package>+<version> filename
+    "fragment" (stem) or egg fragment.
+
+    :param fragment: The string to parse. E.g. foo-2.1
+    :param canonical_name: The canonicalized name of the package this
+        belongs to.
+    """
+    try:
+        version_start = _find_name_version_sep(fragment, canonical_name) + 1
+    except ValueError:
+        return None
+    version = fragment[version_start:]
+    if not version:
+        return None
+    return version
+
+
+def _determine_base_url(document, page_url):
+    """Determine the HTML document's base URL.
+
+    This looks for a ``<base>`` tag in the HTML document. If present, its href
+    attribute denotes the base URL of anchor tags in the document. If there is
+    no such tag (or if it does not have a valid href attribute), the HTML
+    file's URL is used as the base URL.
+
+    :param document: An HTML document representation. The current
+        implementation expects the result of ``html5lib.parse()``.
+    :param page_url: The URL of the HTML document.
+    """
+    for base in document.findall(".//base"):
+        href = base.get("href")
+        if href is not None:
+            return href
+    return page_url
+
+
+def _get_encoding_from_headers(headers):
+    """Determine if we have any encoding information in our headers.
+    """
+    if headers and "Content-Type" in headers:
+        content_type, params = cgi.parse_header(headers["Content-Type"])
+        if "charset" in params:
+            return params['charset']
+    return None
+
+
+def _clean_link(url):
+    # type: (str) -> str
+    """Makes sure a link is fully encoded.  That is, if a ' ' shows up in
+    the link, it will be rewritten to %20 (while not over-quoting
+    % or other characters)."""
+    # Split the URL into parts according to the general structure
+    # `scheme://netloc/path;parameters?query#fragment`. Note that the
+    # `netloc` can be empty and the URI will then refer to a local
+    # filesystem path.
+    result = urllib_parse.urlparse(url)
+    # In both cases below we unquote prior to quoting to make sure
+    # nothing is double quoted.
+    if result.netloc == "":
+        # On Windows the path part might contain a drive letter which
+        # should not be quoted. On Linux where drive letters do not
+        # exist, the colon should be quoted. We rely on urllib.request
+        # to do the right thing here.
+        path = urllib_request.pathname2url(
+            urllib_request.url2pathname(result.path))
+    else:
+        # In addition to the `/` character we protect `@` so that
+        # revision strings in VCS URLs are properly parsed.
+        path = urllib_parse.quote(urllib_parse.unquote(result.path), safe="/@")
+    return urllib_parse.urlunparse(result._replace(path=path))
+
+
+def _create_link_from_element(
+    anchor,    # type: HTMLElement
+    page_url,  # type: str
+    base_url,  # type: str
+):
+    # type: (...) -> Optional[Link]
+    """
+    Convert an anchor element in a simple repository page to a Link.
+    """
+    href = anchor.get("href")
+    if not href:
+        return None
+
+    url = _clean_link(urllib_parse.urljoin(base_url, href))
+    pyrequire = anchor.get('data-requires-python')
+    pyrequire = unescape(pyrequire) if pyrequire else None
+
+    yanked_reason = anchor.get('data-yanked')
+    if yanked_reason:
+        # This is a unicode string in Python 2 (and 3).
+        yanked_reason = unescape(yanked_reason)
+
+    link = Link(
+        url,
+        comes_from=page_url,
+        requires_python=pyrequire,
+        yanked_reason=yanked_reason,
+    )
+
+    return link
+
+
+class HTMLPage(object):
+    """Represents one page, along with its URL"""
+
+    def __init__(self, content, url, headers=None):
+        # type: (bytes, str, MutableMapping[str, str]) -> None
+        self.content = content
+        self.url = url
+        self.headers = headers
+
+    def __str__(self):
+        return redact_password_from_url(self.url)
+
+    def iter_links(self):
+        # type: () -> Iterable[Link]
+        """Yields all links in the page"""
+        document = html5lib.parse(
+            self.content,
+            transport_encoding=_get_encoding_from_headers(self.headers),
+            namespaceHTMLElements=False,
+        )
+        base_url = _determine_base_url(document, self.url)
+        for anchor in document.findall(".//a"):
+            link = _create_link_from_element(
+                anchor,
+                page_url=self.url,
+                base_url=base_url,
+            )
+            if link is None:
+                continue
+            yield link
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/legacy_resolve.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/legacy_resolve.py
new file mode 100644
index 00000000..1d9229cb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/legacy_resolve.py
@@ -0,0 +1,457 @@
+"""Dependency Resolution
+
+The dependency resolution in pip is performed as follows:
+
+for top-level requirements:
+    a. only one spec allowed per project, regardless of conflicts or not.
+       otherwise a "double requirement" exception is raised
+    b. they override sub-dependency requirements.
+for sub-dependencies
+    a. "first found, wins" (where the order is breadth first)
+"""
+
+import logging
+import sys
+from collections import defaultdict
+from itertools import chain
+
+from pip._vendor.packaging import specifiers
+
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled, DistributionNotFound, HashError, HashErrors,
+    UnsupportedPythonVersion,
+)
+from pip._internal.req.constructors import install_req_from_req_string
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    dist_in_usersite, ensure_dir, normalize_version_info,
+)
+from pip._internal.utils.packaging import (
+    check_requires_python, get_requires_python,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import DefaultDict, List, Optional, Set, Tuple
+    from pip._vendor import pkg_resources
+
+    from pip._internal.cache import WheelCache
+    from pip._internal.distributions import AbstractDistribution
+    from pip._internal.download import PipSession
+    from pip._internal.index import PackageFinder
+    from pip._internal.operations.prepare import RequirementPreparer
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.req.req_set import RequirementSet
+
+logger = logging.getLogger(__name__)
+
+
+def _check_dist_requires_python(
+    dist,  # type: pkg_resources.Distribution
+    version_info,  # type: Tuple[int, int, int]
+    ignore_requires_python=False,  # type: bool
+):
+    # type: (...) -> None
+    """
+    Check whether the given Python version is compatible with a distribution's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+
+    :raises UnsupportedPythonVersion: When the given Python version isn't
+        compatible.
+    """
+    requires_python = get_requires_python(dist)
+    try:
+        is_compatible = check_requires_python(
+            requires_python, version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier as exc:
+        logger.warning(
+            "Package %r has an invalid Requires-Python: %s",
+            dist.project_name, exc,
+        )
+        return
+
+    if is_compatible:
+        return
+
+    version = '.'.join(map(str, version_info))
+    if ignore_requires_python:
+        logger.debug(
+            'Ignoring failed Requires-Python check for package %r: '
+            '%s not in %r',
+            dist.project_name, version, requires_python,
+        )
+        return
+
+    raise UnsupportedPythonVersion(
+        'Package {!r} requires a different Python: {} not in {!r}'.format(
+            dist.project_name, version, requires_python,
+        ))
+
+
+class Resolver(object):
+    """Resolves which packages need to be installed/uninstalled to perform \
+    the requested operation without breaking the requirements of any package.
+    """
+
+    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
+
+    def __init__(
+        self,
+        preparer,  # type: RequirementPreparer
+        session,  # type: PipSession
+        finder,  # type: PackageFinder
+        wheel_cache,  # type: Optional[WheelCache]
+        use_user_site,  # type: bool
+        ignore_dependencies,  # type: bool
+        ignore_installed,  # type: bool
+        ignore_requires_python,  # type: bool
+        force_reinstall,  # type: bool
+        isolated,  # type: bool
+        upgrade_strategy,  # type: str
+        use_pep517=None,  # type: Optional[bool]
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+    ):
+        # type: (...) -> None
+        super(Resolver, self).__init__()
+        assert upgrade_strategy in self._allowed_strategies
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        self._py_version_info = py_version_info
+
+        self.preparer = preparer
+        self.finder = finder
+        self.session = session
+
+        # NOTE: This would eventually be replaced with a cache that can give
+        #       information about both sdist and wheels transparently.
+        self.wheel_cache = wheel_cache
+
+        # This is set in resolve
+        self.require_hashes = None  # type: Optional[bool]
+
+        self.upgrade_strategy = upgrade_strategy
+        self.force_reinstall = force_reinstall
+        self.isolated = isolated
+        self.ignore_dependencies = ignore_dependencies
+        self.ignore_installed = ignore_installed
+        self.ignore_requires_python = ignore_requires_python
+        self.use_user_site = use_user_site
+        self.use_pep517 = use_pep517
+
+        self._discovered_dependencies = \
+            defaultdict(list)  # type: DefaultDict[str, List]
+
+    def resolve(self, requirement_set):
+        # type: (RequirementSet) -> None
+        """Resolve what operations need to be done
+
+        As a side-effect of this method, the packages (and their dependencies)
+        are downloaded, unpacked and prepared for installation. This
+        preparation is done by ``pip.operations.prepare``.
+
+        Once PyPI has static dependency metadata available, it would be
+        possible to move the preparation to become a step separated from
+        dependency resolution.
+        """
+        # make the wheelhouse
+        if self.preparer.wheel_download_dir:
+            ensure_dir(self.preparer.wheel_download_dir)
+
+        # If any top-level requirement has a hash specified, enter
+        # hash-checking mode, which requires hashes from all.
+        root_reqs = (
+            requirement_set.unnamed_requirements +
+            list(requirement_set.requirements.values())
+        )
+        self.require_hashes = (
+            requirement_set.require_hashes or
+            any(req.has_hash_options for req in root_reqs)
+        )
+
+        # Display where finder is looking for packages
+        search_scope = self.finder.search_scope
+        locations = search_scope.get_formatted_locations()
+        if locations:
+            logger.info(locations)
+
+        # Actually prepare the files, and collect any exceptions. Most hash
+        # exceptions cannot be checked ahead of time, because
+        # req.populate_link() needs to be called before we can make decisions
+        # based on link type.
+        discovered_reqs = []  # type: List[InstallRequirement]
+        hash_errors = HashErrors()
+        for req in chain(root_reqs, discovered_reqs):
+            try:
+                discovered_reqs.extend(
+                    self._resolve_one(requirement_set, req)
+                )
+            except HashError as exc:
+                exc.req = req
+                hash_errors.append(exc)
+
+        if hash_errors:
+            raise hash_errors
+
+    def _is_upgrade_allowed(self, req):
+        # type: (InstallRequirement) -> bool
+        if self.upgrade_strategy == "to-satisfy-only":
+            return False
+        elif self.upgrade_strategy == "eager":
+            return True
+        else:
+            assert self.upgrade_strategy == "only-if-needed"
+            return req.is_direct
+
+    def _set_req_to_reinstall(self, req):
+        # type: (InstallRequirement) -> None
+        """
+        Set a requirement to be installed.
+        """
+        # Don't uninstall the conflict if doing a user install and the
+        # conflict is not a user install.
+        if not self.use_user_site or dist_in_usersite(req.satisfied_by):
+            req.conflicts_with = req.satisfied_by
+        req.satisfied_by = None
+
+    # XXX: Stop passing requirement_set for options
+    def _check_skip_installed(self, req_to_install):
+        # type: (InstallRequirement) -> Optional[str]
+        """Check if req_to_install should be skipped.
+
+        This will check if the req is installed, and whether we should upgrade
+        or reinstall it, taking into account all the relevant user options.
+
+        After calling this req_to_install will only have satisfied_by set to
+        None if the req_to_install is to be upgraded/reinstalled etc. Any
+        other value will be a dist recording the current thing installed that
+        satisfies the requirement.
+
+        Note that for vcs urls and the like we can't assess skipping in this
+        routine - we simply identify that we need to pull the thing down,
+        then later on it is pulled down and introspected to assess upgrade/
+        reinstalls etc.
+
+        :return: A text reason for why it was skipped, or None.
+        """
+        if self.ignore_installed:
+            return None
+
+        req_to_install.check_if_exists(self.use_user_site)
+        if not req_to_install.satisfied_by:
+            return None
+
+        if self.force_reinstall:
+            self._set_req_to_reinstall(req_to_install)
+            return None
+
+        if not self._is_upgrade_allowed(req_to_install):
+            if self.upgrade_strategy == "only-if-needed":
+                return 'already satisfied, skipping upgrade'
+            return 'already satisfied'
+
+        # Check for the possibility of an upgrade.  For link-based
+        # requirements we have to pull the tree down and inspect to assess
+        # the version #, so it's handled way down.
+        if not req_to_install.link:
+            try:
+                self.finder.find_requirement(req_to_install, upgrade=True)
+            except BestVersionAlreadyInstalled:
+                # Then the best version is installed.
+                return 'already up-to-date'
+            except DistributionNotFound:
+                # No distribution found, so we squash the error.  It will
+                # be raised later when we re-try later to do the install.
+                # Why don't we just raise here?
+                pass
+
+        self._set_req_to_reinstall(req_to_install)
+        return None
+
+    def _get_abstract_dist_for(self, req):
+        # type: (InstallRequirement) -> AbstractDistribution
+        """Takes a InstallRequirement and returns a single AbstractDist \
+        representing a prepared variant of the same.
+        """
+        assert self.require_hashes is not None, (
+            "require_hashes should have been set in Resolver.resolve()"
+        )
+
+        if req.editable:
+            return self.preparer.prepare_editable_requirement(
+                req, self.require_hashes, self.use_user_site, self.finder,
+            )
+
+        # satisfied_by is only evaluated by calling _check_skip_installed,
+        # so it must be None here.
+        assert req.satisfied_by is None
+        skip_reason = self._check_skip_installed(req)
+
+        if req.satisfied_by:
+            return self.preparer.prepare_installed_requirement(
+                req, self.require_hashes, skip_reason
+            )
+
+        upgrade_allowed = self._is_upgrade_allowed(req)
+        abstract_dist = self.preparer.prepare_linked_requirement(
+            req, self.session, self.finder, upgrade_allowed,
+            self.require_hashes
+        )
+
+        # NOTE
+        # The following portion is for determining if a certain package is
+        # going to be re-installed/upgraded or not and reporting to the user.
+        # This should probably get cleaned up in a future refactor.
+
+        # req.req is only avail after unpack for URL
+        # pkgs repeat check_if_exists to uninstall-on-upgrade
+        # (#14)
+        if not self.ignore_installed:
+            req.check_if_exists(self.use_user_site)
+
+        if req.satisfied_by:
+            should_modify = (
+                self.upgrade_strategy != "to-satisfy-only" or
+                self.force_reinstall or
+                self.ignore_installed or
+                req.link.scheme == 'file'
+            )
+            if should_modify:
+                self._set_req_to_reinstall(req)
+            else:
+                logger.info(
+                    'Requirement already satisfied (use --upgrade to upgrade):'
+                    ' %s', req,
+                )
+
+        return abstract_dist
+
+    def _resolve_one(
+        self,
+        requirement_set,  # type: RequirementSet
+        req_to_install  # type: InstallRequirement
+    ):
+        # type: (...) -> List[InstallRequirement]
+        """Prepare a single requirements file.
+
+        :return: A list of additional InstallRequirements to also install.
+        """
+        # Tell user what we are doing for this requirement:
+        # obtain (editable), skipping, processing (local url), collecting
+        # (remote url or package name)
+        if req_to_install.constraint or req_to_install.prepared:
+            return []
+
+        req_to_install.prepared = True
+
+        # register tmp src for cleanup in case something goes wrong
+        requirement_set.reqs_to_cleanup.append(req_to_install)
+
+        abstract_dist = self._get_abstract_dist_for(req_to_install)
+
+        # Parse and return dependencies
+        dist = abstract_dist.get_pkg_resources_distribution()
+        # This will raise UnsupportedPythonVersion if the given Python
+        # version isn't compatible with the distribution's Requires-Python.
+        _check_dist_requires_python(
+            dist, version_info=self._py_version_info,
+            ignore_requires_python=self.ignore_requires_python,
+        )
+
+        more_reqs = []  # type: List[InstallRequirement]
+
+        def add_req(subreq, extras_requested):
+            sub_install_req = install_req_from_req_string(
+                str(subreq),
+                req_to_install,
+                isolated=self.isolated,
+                wheel_cache=self.wheel_cache,
+                use_pep517=self.use_pep517
+            )
+            parent_req_name = req_to_install.name
+            to_scan_again, add_to_parent = requirement_set.add_requirement(
+                sub_install_req,
+                parent_req_name=parent_req_name,
+                extras_requested=extras_requested,
+            )
+            if parent_req_name and add_to_parent:
+                self._discovered_dependencies[parent_req_name].append(
+                    add_to_parent
+                )
+            more_reqs.extend(to_scan_again)
+
+        with indent_log():
+            # We add req_to_install before its dependencies, so that we
+            # can refer to it when adding dependencies.
+            if not requirement_set.has_requirement(req_to_install.name):
+                # 'unnamed' requirements will get added here
+                req_to_install.is_direct = True
+                requirement_set.add_requirement(
+                    req_to_install, parent_req_name=None,
+                )
+
+            if not self.ignore_dependencies:
+                if req_to_install.extras:
+                    logger.debug(
+                        "Installing extra requirements: %r",
+                        ','.join(req_to_install.extras),
+                    )
+                missing_requested = sorted(
+                    set(req_to_install.extras) - set(dist.extras)
+                )
+                for missing in missing_requested:
+                    logger.warning(
+                        '%s does not provide the extra \'%s\'',
+                        dist, missing
+                    )
+
+                available_requested = sorted(
+                    set(dist.extras) & set(req_to_install.extras)
+                )
+                for subreq in dist.requires(available_requested):
+                    add_req(subreq, extras_requested=available_requested)
+
+            if not req_to_install.editable and not req_to_install.satisfied_by:
+                # XXX: --no-install leads this to report 'Successfully
+                # downloaded' for only non-editable reqs, even though we took
+                # action on them.
+                requirement_set.successfully_downloaded.append(req_to_install)
+
+        return more_reqs
+
+    def get_installation_order(self, req_set):
+        # type: (RequirementSet) -> List[InstallRequirement]
+        """Create the installation order.
+
+        The installation order is topological - requirements are installed
+        before the requiring thing. We break cycles at an arbitrary point,
+        and make no other guarantees.
+        """
+        # The current implementation, which we may change at any point
+        # installs the user specified things in the order given, except when
+        # dependencies must come earlier to achieve topological order.
+        order = []
+        ordered_reqs = set()  # type: Set[InstallRequirement]
+
+        def schedule(req):
+            if req.satisfied_by or req in ordered_reqs:
+                return
+            if req.constraint:
+                return
+            ordered_reqs.add(req)
+            for dep in self._discovered_dependencies[req.name]:
+                schedule(dep)
+            order.append(req)
+
+        for install_req in req_set.requirements.values():
+            schedule(install_req)
+        return order
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/locations.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/locations.py
new file mode 100644
index 00000000..5f843d79
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/locations.py
@@ -0,0 +1,142 @@
+"""Locations where we look for configs, install stuff, etc"""
+from __future__ import absolute_import
+
+import os
+import os.path
+import platform
+import site
+import sys
+import sysconfig
+from distutils import sysconfig as distutils_sysconfig
+from distutils.command.install import SCHEME_KEYS  # type: ignore
+
+from pip._internal.utils import appdirs
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Union, Dict, List, Optional
+
+
+# Application Directories
+USER_CACHE_DIR = appdirs.user_cache_dir("pip")
+
+
+def get_src_prefix():
+    if running_under_virtualenv():
+        src_prefix = os.path.join(sys.prefix, 'src')
+    else:
+        # FIXME: keep src in cwd for now (it is not a temporary folder)
+        try:
+            src_prefix = os.path.join(os.getcwd(), 'src')
+        except OSError:
+            # In case the current working directory has been renamed or deleted
+            sys.exit(
+                "The folder you are executing pip from can no longer be found."
+            )
+
+    # under macOS + virtualenv sys.prefix is not properly resolved
+    # it is something like /path/to/python/bin/..
+    return os.path.abspath(src_prefix)
+
+
+# FIXME doesn't account for venv linked to global site-packages
+
+site_packages = sysconfig.get_path("purelib")  # type: Optional[str]
+
+# This is because of a bug in PyPy's sysconfig module, see
+# https://bitbucket.org/pypy/pypy/issues/2506/sysconfig-returns-incorrect-paths
+# for more information.
+if platform.python_implementation().lower() == "pypy":
+    site_packages = distutils_sysconfig.get_python_lib()
+try:
+    # Use getusersitepackages if this is present, as it ensures that the
+    # value is initialised properly.
+    user_site = site.getusersitepackages()
+except AttributeError:
+    user_site = site.USER_SITE
+
+if WINDOWS:
+    bin_py = os.path.join(sys.prefix, 'Scripts')
+    bin_user = os.path.join(user_site, 'Scripts')
+    # buildout uses 'bin' on Windows too?
+    if not os.path.exists(bin_py):
+        bin_py = os.path.join(sys.prefix, 'bin')
+        bin_user = os.path.join(user_site, 'bin')
+else:
+    bin_py = os.path.join(sys.prefix, 'bin')
+    bin_user = os.path.join(user_site, 'bin')
+
+    # Forcing to use /usr/local/bin for standard macOS framework installs
+    # Also log to ~/Library/Logs/ for use with the Console.app log viewer
+    if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
+        bin_py = '/usr/local/bin'
+
+
+def distutils_scheme(dist_name, user=False, home=None, root=None,
+                     isolated=False, prefix=None):
+    # type:(str, bool, str, str, bool, str) -> dict
+    """
+    Return a distutils install scheme
+    """
+    from distutils.dist import Distribution
+
+    scheme = {}
+
+    if isolated:
+        extra_dist_args = {"script_args": ["--no-user-cfg"]}
+    else:
+        extra_dist_args = {}
+    dist_args = {'name': dist_name}  # type: Dict[str, Union[str, List[str]]]
+    dist_args.update(extra_dist_args)
+
+    d = Distribution(dist_args)
+    # Ignoring, typeshed issue reported python/typeshed/issues/2567
+    d.parse_config_files()
+    # NOTE: Ignoring type since mypy can't find attributes on 'Command'
+    i = d.get_command_obj('install', create=True)  # type: Any
+    assert i is not None
+    # NOTE: setting user or home has the side-effect of creating the home dir
+    # or user base for installations during finalize_options()
+    # ideally, we'd prefer a scheme class that has no side-effects.
+    assert not (user and prefix), "user={} prefix={}".format(user, prefix)
+    assert not (home and prefix), "home={} prefix={}".format(home, prefix)
+    i.user = user or i.user
+    if user or home:
+        i.prefix = ""
+    i.prefix = prefix or i.prefix
+    i.home = home or i.home
+    i.root = root or i.root
+    i.finalize_options()
+    for key in SCHEME_KEYS:
+        scheme[key] = getattr(i, 'install_' + key)
+
+    # install_lib specified in setup.cfg should install *everything*
+    # into there (i.e. it takes precedence over both purelib and
+    # platlib).  Note, i.install_lib is *always* set after
+    # finalize_options(); we only want to override here if the user
+    # has explicitly requested it hence going back to the config
+
+    # Ignoring, typeshed issue reported python/typeshed/issues/2567
+    if 'install_lib' in d.get_option_dict('install'):  # type: ignore
+        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
+
+    if running_under_virtualenv():
+        scheme['headers'] = os.path.join(
+            sys.prefix,
+            'include',
+            'site',
+            'python' + sys.version[:3],
+            dist_name,
+        )
+
+        if root is not None:
+            path_no_drive = os.path.splitdrive(
+                os.path.abspath(scheme["headers"]))[1]
+            scheme["headers"] = os.path.join(
+                root,
+                path_no_drive[1:],
+            )
+
+    return scheme
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__init__.py
new file mode 100644
index 00000000..7855226e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__init__.py
@@ -0,0 +1,2 @@
+"""A package that contains models that represent entities.
+"""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..0c0e1078
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/candidate.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/candidate.cpython-37.pyc
new file mode 100644
index 00000000..8c36fe7c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/candidate.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/format_control.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/format_control.cpython-37.pyc
new file mode 100644
index 00000000..e74488f2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/format_control.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/index.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/index.cpython-37.pyc
new file mode 100644
index 00000000..9286478b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/index.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/link.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/link.cpython-37.pyc
new file mode 100644
index 00000000..921bce9c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/link.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-37.pyc
new file mode 100644
index 00000000..13792322
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/selection_prefs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/selection_prefs.cpython-37.pyc
new file mode 100644
index 00000000..f40b57f7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/selection_prefs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/target_python.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/target_python.cpython-37.pyc
new file mode 100644
index 00000000..d198a509
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/__pycache__/target_python.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/candidate.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/candidate.py
new file mode 100644
index 00000000..1b99690f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/candidate.py
@@ -0,0 +1,36 @@
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.utils.models import KeyBasedCompareMixin
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._vendor.packaging.version import _BaseVersion
+    from pip._internal.models.link import Link
+    from typing import Any
+
+
+class InstallationCandidate(KeyBasedCompareMixin):
+    """Represents a potential "candidate" for installation.
+    """
+
+    def __init__(self, project, version, link):
+        # type: (Any, str, Link) -> None
+        self.project = project
+        self.version = parse_version(version)  # type: _BaseVersion
+        self.link = link
+
+        super(InstallationCandidate, self).__init__(
+            key=(self.project, self.version, self.link),
+            defining_class=InstallationCandidate
+        )
+
+    def __repr__(self):
+        # type: () -> str
+        return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
+            self.project, self.version, self.link,
+        )
+
+    def __str__(self):
+        return '{!r} candidate (version {} at {})'.format(
+            self.project, self.version, self.link,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/format_control.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/format_control.py
new file mode 100644
index 00000000..53138e48
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/format_control.py
@@ -0,0 +1,73 @@
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Set, FrozenSet
+
+
+class FormatControl(object):
+    """Helper for managing formats from which a package can be installed.
+    """
+
+    def __init__(self, no_binary=None, only_binary=None):
+        # type: (Optional[Set], Optional[Set]) -> None
+        if no_binary is None:
+            no_binary = set()
+        if only_binary is None:
+            only_binary = set()
+
+        self.no_binary = no_binary
+        self.only_binary = only_binary
+
+    def __eq__(self, other):
+        return self.__dict__ == other.__dict__
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __repr__(self):
+        return "{}({}, {})".format(
+            self.__class__.__name__,
+            self.no_binary,
+            self.only_binary
+        )
+
+    @staticmethod
+    def handle_mutual_excludes(value, target, other):
+        # type: (str, Optional[Set], Optional[Set]) -> None
+        new = value.split(',')
+        while ':all:' in new:
+            other.clear()
+            target.clear()
+            target.add(':all:')
+            del new[:new.index(':all:') + 1]
+            # Without a none, we want to discard everything as :all: covers it
+            if ':none:' not in new:
+                return
+        for name in new:
+            if name == ':none:':
+                target.clear()
+                continue
+            name = canonicalize_name(name)
+            other.discard(name)
+            target.add(name)
+
+    def get_allowed_formats(self, canonical_name):
+        # type: (str) -> FrozenSet
+        result = {"binary", "source"}
+        if canonical_name in self.only_binary:
+            result.discard('source')
+        elif canonical_name in self.no_binary:
+            result.discard('binary')
+        elif ':all:' in self.only_binary:
+            result.discard('source')
+        elif ':all:' in self.no_binary:
+            result.discard('binary')
+        return frozenset(result)
+
+    def disallow_binaries(self):
+        # type: () -> None
+        self.handle_mutual_excludes(
+            ':all:', self.no_binary, self.only_binary,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/index.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/index.py
new file mode 100644
index 00000000..ead1efbd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/index.py
@@ -0,0 +1,31 @@
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+
+class PackageIndex(object):
+    """Represents a Package Index and provides easier access to endpoints
+    """
+
+    def __init__(self, url, file_storage_domain):
+        # type: (str, str) -> None
+        super(PackageIndex, self).__init__()
+        self.url = url
+        self.netloc = urllib_parse.urlsplit(url).netloc
+        self.simple_url = self._url_for_path('simple')
+        self.pypi_url = self._url_for_path('pypi')
+
+        # This is part of a temporary hack used to block installs of PyPI
+        # packages which depend on external urls only necessary until PyPI can
+        # block such packages themselves
+        self.file_storage_domain = file_storage_domain
+
+    def _url_for_path(self, path):
+        # type: (str) -> str
+        return urllib_parse.urljoin(self.url, path)
+
+
+PyPI = PackageIndex(
+    'https://pypi.org/', file_storage_domain='files.pythonhosted.org'
+)
+TestPyPI = PackageIndex(
+    'https://test.pypi.org/', file_storage_domain='test-files.pythonhosted.org'
+)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/link.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/link.py
new file mode 100644
index 00000000..d42be28c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/link.py
@@ -0,0 +1,213 @@
+import posixpath
+import re
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.misc import (
+    WHEEL_EXTENSION, path_to_url, redact_password_from_url,
+    split_auth_from_netloc, splitext,
+)
+from pip._internal.utils.models import KeyBasedCompareMixin
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Text, Tuple, Union
+    from pip._internal.index import HTMLPage
+    from pip._internal.utils.hashes import Hashes
+
+
+class Link(KeyBasedCompareMixin):
+    """Represents a parsed link from a Package Index's simple URL
+    """
+
+    def __init__(
+        self,
+        url,                   # type: str
+        comes_from=None,       # type: Optional[Union[str, HTMLPage]]
+        requires_python=None,  # type: Optional[str]
+        yanked_reason=None,    # type: Optional[Text]
+    ):
+        # type: (...) -> None
+        """
+        :param url: url of the resource pointed to (href of the link)
+        :param comes_from: instance of HTMLPage where the link was found,
+            or string.
+        :param requires_python: String containing the `Requires-Python`
+            metadata field, specified in PEP 345. This may be specified by
+            a data-requires-python attribute in the HTML link tag, as
+            described in PEP 503.
+        :param yanked_reason: the reason the file has been yanked, if the
+            file has been yanked, or None if the file hasn't been yanked.
+            This is the value of the "data-yanked" attribute, if present, in
+            a simple repository HTML link. If the file has been yanked but
+            no reason was provided, this should be the empty string. See
+            PEP 592 for more information and the specification.
+        """
+
+        # url can be a UNC windows share
+        if url.startswith('\\\\'):
+            url = path_to_url(url)
+
+        self._parsed_url = urllib_parse.urlsplit(url)
+        # Store the url as a private attribute to prevent accidentally
+        # trying to set a new value.
+        self._url = url
+
+        self.comes_from = comes_from
+        self.requires_python = requires_python if requires_python else None
+        self.yanked_reason = yanked_reason
+
+        super(Link, self).__init__(key=url, defining_class=Link)
+
+    def __str__(self):
+        if self.requires_python:
+            rp = ' (requires-python:%s)' % self.requires_python
+        else:
+            rp = ''
+        if self.comes_from:
+            return '%s (from %s)%s' % (redact_password_from_url(self._url),
+                                       self.comes_from, rp)
+        else:
+            return redact_password_from_url(str(self._url))
+
+    def __repr__(self):
+        return '<Link %s>' % self
+
+    @property
+    def url(self):
+        # type: () -> str
+        return self._url
+
+    @property
+    def filename(self):
+        # type: () -> str
+        path = self.path.rstrip('/')
+        name = posixpath.basename(path)
+        if not name:
+            # Make sure we don't leak auth information if the netloc
+            # includes a username and password.
+            netloc, user_pass = split_auth_from_netloc(self.netloc)
+            return netloc
+
+        name = urllib_parse.unquote(name)
+        assert name, ('URL %r produced no filename' % self._url)
+        return name
+
+    @property
+    def scheme(self):
+        # type: () -> str
+        return self._parsed_url.scheme
+
+    @property
+    def netloc(self):
+        # type: () -> str
+        """
+        This can contain auth information.
+        """
+        return self._parsed_url.netloc
+
+    @property
+    def path(self):
+        # type: () -> str
+        return urllib_parse.unquote(self._parsed_url.path)
+
+    def splitext(self):
+        # type: () -> Tuple[str, str]
+        return splitext(posixpath.basename(self.path.rstrip('/')))
+
+    @property
+    def ext(self):
+        # type: () -> str
+        return self.splitext()[1]
+
+    @property
+    def url_without_fragment(self):
+        # type: () -> str
+        scheme, netloc, path, query, fragment = self._parsed_url
+        return urllib_parse.urlunsplit((scheme, netloc, path, query, None))
+
+    _egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
+
+    @property
+    def egg_fragment(self):
+        # type: () -> Optional[str]
+        match = self._egg_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    _subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
+
+    @property
+    def subdirectory_fragment(self):
+        # type: () -> Optional[str]
+        match = self._subdirectory_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    _hash_re = re.compile(
+        r'(sha1|sha224|sha384|sha256|sha512|md5)=([a-f0-9]+)'
+    )
+
+    @property
+    def hash(self):
+        # type: () -> Optional[str]
+        match = self._hash_re.search(self._url)
+        if match:
+            return match.group(2)
+        return None
+
+    @property
+    def hash_name(self):
+        # type: () -> Optional[str]
+        match = self._hash_re.search(self._url)
+        if match:
+            return match.group(1)
+        return None
+
+    @property
+    def show_url(self):
+        # type: () -> Optional[str]
+        return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0])
+
+    @property
+    def is_wheel(self):
+        # type: () -> bool
+        return self.ext == WHEEL_EXTENSION
+
+    @property
+    def is_artifact(self):
+        # type: () -> bool
+        """
+        Determines if this points to an actual artifact (e.g. a tarball) or if
+        it points to an "abstract" thing like a path or a VCS location.
+        """
+        from pip._internal.vcs import vcs
+
+        if self.scheme in vcs.all_schemes:
+            return False
+
+        return True
+
+    @property
+    def is_yanked(self):
+        # type: () -> bool
+        return self.yanked_reason is not None
+
+    @property
+    def has_hash(self):
+        return self.hash_name is not None
+
+    def is_hash_allowed(self, hashes):
+        # type: (Optional[Hashes]) -> bool
+        """
+        Return True if the link has a hash and it is allowed.
+        """
+        if hashes is None or not self.has_hash:
+            return False
+        # Assert non-None so mypy knows self.hash_name and self.hash are str.
+        assert self.hash_name is not None
+        assert self.hash is not None
+
+        return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/search_scope.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/search_scope.py
new file mode 100644
index 00000000..62152449
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/search_scope.py
@@ -0,0 +1,113 @@
+import itertools
+import logging
+import os
+import posixpath
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.models.index import PyPI
+from pip._internal.utils.compat import HAS_TLS
+from pip._internal.utils.misc import normalize_path, redact_password_from_url
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+
+logger = logging.getLogger(__name__)
+
+
+class SearchScope(object):
+
+    """
+    Encapsulates the locations that pip is configured to search.
+    """
+
+    @classmethod
+    def create(
+        cls,
+        find_links,  # type: List[str]
+        index_urls,  # type: List[str]
+    ):
+        # type: (...) -> SearchScope
+        """
+        Create a SearchScope object after normalizing the `find_links`.
+        """
+        # Build find_links. If an argument starts with ~, it may be
+        # a local file relative to a home directory. So try normalizing
+        # it and if it exists, use the normalized version.
+        # This is deliberately conservative - it might be fine just to
+        # blindly normalize anything starting with a ~...
+        built_find_links = []  # type: List[str]
+        for link in find_links:
+            if link.startswith('~'):
+                new_link = normalize_path(link)
+                if os.path.exists(new_link):
+                    link = new_link
+            built_find_links.append(link)
+
+        # If we don't have TLS enabled, then WARN if anyplace we're looking
+        # relies on TLS.
+        if not HAS_TLS:
+            for link in itertools.chain(index_urls, built_find_links):
+                parsed = urllib_parse.urlparse(link)
+                if parsed.scheme == 'https':
+                    logger.warning(
+                        'pip is configured with locations that require '
+                        'TLS/SSL, however the ssl module in Python is not '
+                        'available.'
+                    )
+                    break
+
+        return cls(
+            find_links=built_find_links,
+            index_urls=index_urls,
+        )
+
+    def __init__(
+        self,
+        find_links,  # type: List[str]
+        index_urls,  # type: List[str]
+    ):
+        # type: (...) -> None
+        self.find_links = find_links
+        self.index_urls = index_urls
+
+    def get_formatted_locations(self):
+        # type: () -> str
+        lines = []
+        if self.index_urls and self.index_urls != [PyPI.simple_url]:
+            lines.append(
+                'Looking in indexes: {}'.format(', '.join(
+                    redact_password_from_url(url) for url in self.index_urls))
+            )
+        if self.find_links:
+            lines.append(
+                'Looking in links: {}'.format(', '.join(
+                    redact_password_from_url(url) for url in self.find_links))
+            )
+        return '\n'.join(lines)
+
+    def get_index_urls_locations(self, project_name):
+        # type: (str) -> List[str]
+        """Returns the locations found via self.index_urls
+
+        Checks the url_name on the main (first in the list) index and
+        use this url_name to produce all locations
+        """
+
+        def mkurl_pypi_url(url):
+            loc = posixpath.join(
+                url,
+                urllib_parse.quote(canonicalize_name(project_name)))
+            # For maximum compatibility with easy_install, ensure the path
+            # ends in a trailing slash.  Although this isn't in the spec
+            # (and PyPI can handle it without the slash) some other index
+            # implementations might break if they relied on easy_install's
+            # behavior.
+            if not loc.endswith('/'):
+                loc = loc + '/'
+            return loc
+
+        return [mkurl_pypi_url(url) for url in self.index_urls]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/selection_prefs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/selection_prefs.py
new file mode 100644
index 00000000..f58fdce9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/selection_prefs.py
@@ -0,0 +1,47 @@
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+    from pip._internal.models.format_control import FormatControl
+
+
+class SelectionPreferences(object):
+
+    """
+    Encapsulates the candidate selection preferences for downloading
+    and installing files.
+    """
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        allow_yanked,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        format_control=None,          # type: Optional[FormatControl]
+        prefer_binary=False,          # type: bool
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """Create a SelectionPreferences object.
+
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param format_control: A FormatControl object or None. Used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param prefer_binary: Whether to prefer an old, but valid, binary
+            dist over a new source dist.
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self.allow_yanked = allow_yanked
+        self.allow_all_prereleases = allow_all_prereleases
+        self.format_control = format_control
+        self.prefer_binary = prefer_binary
+        self.ignore_requires_python = ignore_requires_python
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/target_python.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/target_python.py
new file mode 100644
index 00000000..a23b79c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/models/target_python.py
@@ -0,0 +1,106 @@
+import sys
+
+from pip._internal.pep425tags import get_supported, version_info_to_nodot
+from pip._internal.utils.misc import normalize_version_info
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Tuple
+    from pip._internal.pep425tags import Pep425Tag
+
+
+class TargetPython(object):
+
+    """
+    Encapsulates the properties of a Python interpreter one is targeting
+    for a package install, download, etc.
+    """
+
+    def __init__(
+        self,
+        platform=None,  # type: Optional[str]
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+        abi=None,  # type: Optional[str]
+        implementation=None,  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        """
+        :param platform: A string or None. If None, searches for packages
+            that are supported by the current system. Otherwise, will find
+            packages that can be built on the platform passed in. These
+            packages will only be downloaded for distribution: they will
+            not be built locally.
+        :param py_version_info: An optional tuple of ints representing the
+            Python version information to use (e.g. `sys.version_info[:3]`).
+            This can have length 1, 2, or 3 when provided.
+        :param abi: A string or None. This is passed to pep425tags.py's
+            get_supported() function as is.
+        :param implementation: A string or None. This is passed to
+            pep425tags.py's get_supported() function as is.
+        """
+        # Store the given py_version_info for when we call get_supported().
+        self._given_py_version_info = py_version_info
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        py_version = '.'.join(map(str, py_version_info[:2]))
+
+        self.abi = abi
+        self.implementation = implementation
+        self.platform = platform
+        self.py_version = py_version
+        self.py_version_info = py_version_info
+
+        # This is used to cache the return value of get_tags().
+        self._valid_tags = None  # type: Optional[List[Pep425Tag]]
+
+    def format_given(self):
+        # type: () -> str
+        """
+        Format the given, non-None attributes for display.
+        """
+        display_version = None
+        if self._given_py_version_info is not None:
+            display_version = '.'.join(
+                str(part) for part in self._given_py_version_info
+            )
+
+        key_values = [
+            ('platform', self.platform),
+            ('version_info', display_version),
+            ('abi', self.abi),
+            ('implementation', self.implementation),
+        ]
+        return ' '.join(
+            '{}={!r}'.format(key, value) for key, value in key_values
+            if value is not None
+        )
+
+    def get_tags(self):
+        # type: () -> List[Pep425Tag]
+        """
+        Return the supported PEP 425 tags to check wheel candidates against.
+
+        The tags are returned in order of preference (most preferred first).
+        """
+        if self._valid_tags is None:
+            # Pass versions=None if no py_version_info was given since
+            # versions=None uses special default logic.
+            py_version_info = self._given_py_version_info
+            if py_version_info is None:
+                versions = None
+            else:
+                versions = [version_info_to_nodot(py_version_info)]
+
+            tags = get_supported(
+                versions=versions,
+                platform=self.platform,
+                abi=self.abi,
+                impl=self.implementation,
+            )
+            self._valid_tags = tags
+
+        return self._valid_tags
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..2020fda1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/check.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/check.cpython-37.pyc
new file mode 100644
index 00000000..28338255
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/check.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc
new file mode 100644
index 00000000..710c275d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc
new file mode 100644
index 00000000..48ba3172
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/check.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/check.py
new file mode 100644
index 00000000..7b8b369f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/check.py
@@ -0,0 +1,159 @@
+"""Validation of dependencies of packages
+"""
+
+import logging
+from collections import namedtuple
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.pkg_resources import RequirementParseError
+
+from pip._internal.distributions import (
+    make_distribution_for_install_requirement,
+)
+from pip._internal.utils.misc import get_installed_distributions
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+logger = logging.getLogger(__name__)
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.req.req_install import InstallRequirement
+    from typing import (
+        Any, Callable, Dict, Optional, Set, Tuple, List
+    )
+
+    # Shorthands
+    PackageSet = Dict[str, 'PackageDetails']
+    Missing = Tuple[str, Any]
+    Conflicting = Tuple[str, str, Any]
+
+    MissingDict = Dict[str, List[Missing]]
+    ConflictingDict = Dict[str, List[Conflicting]]
+    CheckResult = Tuple[MissingDict, ConflictingDict]
+
+PackageDetails = namedtuple('PackageDetails', ['version', 'requires'])
+
+
+def create_package_set_from_installed(**kwargs):
+    # type: (**Any) -> Tuple[PackageSet, bool]
+    """Converts a list of distributions into a PackageSet.
+    """
+    # Default to using all packages installed on the system
+    if kwargs == {}:
+        kwargs = {"local_only": False, "skip": ()}
+
+    package_set = {}
+    problems = False
+    for dist in get_installed_distributions(**kwargs):
+        name = canonicalize_name(dist.project_name)
+        try:
+            package_set[name] = PackageDetails(dist.version, dist.requires())
+        except RequirementParseError as e:
+            # Don't crash on broken metadata
+            logging.warning("Error parsing requirements for %s: %s", name, e)
+            problems = True
+    return package_set, problems
+
+
+def check_package_set(package_set, should_ignore=None):
+    # type: (PackageSet, Optional[Callable[[str], bool]]) -> CheckResult
+    """Check if a package set is consistent
+
+    If should_ignore is passed, it should be a callable that takes a
+    package name and returns a boolean.
+    """
+    if should_ignore is None:
+        def should_ignore(name):
+            return False
+
+    missing = dict()
+    conflicting = dict()
+
+    for package_name in package_set:
+        # Info about dependencies of package_name
+        missing_deps = set()  # type: Set[Missing]
+        conflicting_deps = set()  # type: Set[Conflicting]
+
+        if should_ignore(package_name):
+            continue
+
+        for req in package_set[package_name].requires:
+            name = canonicalize_name(req.project_name)  # type: str
+
+            # Check if it's missing
+            if name not in package_set:
+                missed = True
+                if req.marker is not None:
+                    missed = req.marker.evaluate()
+                if missed:
+                    missing_deps.add((name, req))
+                continue
+
+            # Check if there's a conflict
+            version = package_set[name].version  # type: str
+            if not req.specifier.contains(version, prereleases=True):
+                conflicting_deps.add((name, version, req))
+
+        if missing_deps:
+            missing[package_name] = sorted(missing_deps, key=str)
+        if conflicting_deps:
+            conflicting[package_name] = sorted(conflicting_deps, key=str)
+
+    return missing, conflicting
+
+
+def check_install_conflicts(to_install):
+    # type: (List[InstallRequirement]) -> Tuple[PackageSet, CheckResult]
+    """For checking if the dependency graph would be consistent after \
+    installing given requirements
+    """
+    # Start from the current state
+    package_set, _ = create_package_set_from_installed()
+    # Install packages
+    would_be_installed = _simulate_installation_of(to_install, package_set)
+
+    # Only warn about directly-dependent packages; create a whitelist of them
+    whitelist = _create_whitelist(would_be_installed, package_set)
+
+    return (
+        package_set,
+        check_package_set(
+            package_set, should_ignore=lambda name: name not in whitelist
+        )
+    )
+
+
+def _simulate_installation_of(to_install, package_set):
+    # type: (List[InstallRequirement], PackageSet) -> Set[str]
+    """Computes the version of packages after installing to_install.
+    """
+
+    # Keep track of packages that were installed
+    installed = set()
+
+    # Modify it as installing requirement_set would (assuming no errors)
+    for inst_req in to_install:
+        abstract_dist = make_distribution_for_install_requirement(inst_req)
+        dist = abstract_dist.get_pkg_resources_distribution()
+
+        name = canonicalize_name(dist.key)
+        package_set[name] = PackageDetails(dist.version, dist.requires())
+
+        installed.add(name)
+
+    return installed
+
+
+def _create_whitelist(would_be_installed, package_set):
+    # type: (Set[str], PackageSet) -> Set[str]
+    packages_affected = set(would_be_installed)
+
+    for package_name in package_set:
+        if package_name in packages_affected:
+            continue
+
+        for req in package_set[package_name].requires:
+            if canonicalize_name(req.name) in packages_affected:
+                packages_affected.add(package_name)
+                break
+
+    return packages_affected
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/freeze.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/freeze.py
new file mode 100644
index 00000000..6f5a3dd9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/freeze.py
@@ -0,0 +1,253 @@
+from __future__ import absolute_import
+
+import collections
+import logging
+import os
+import re
+
+from pip._vendor import six
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.pkg_resources import RequirementParseError
+
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.req.constructors import (
+    install_req_from_editable, install_req_from_line,
+)
+from pip._internal.req.req_file import COMMENT_RE
+from pip._internal.utils.misc import (
+    dist_is_editable, get_installed_distributions,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union
+    )
+    from pip._internal.cache import WheelCache
+    from pip._vendor.pkg_resources import (
+        Distribution, Requirement
+    )
+
+    RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
+
+
+logger = logging.getLogger(__name__)
+
+
+def freeze(
+    requirement=None,  # type: Optional[List[str]]
+    find_links=None,  # type: Optional[List[str]]
+    local_only=None,  # type: Optional[bool]
+    user_only=None,  # type: Optional[bool]
+    paths=None,  # type: Optional[List[str]]
+    skip_regex=None,  # type: Optional[str]
+    isolated=False,  # type: bool
+    wheel_cache=None,  # type: Optional[WheelCache]
+    exclude_editable=False,  # type: bool
+    skip=()  # type: Container[str]
+):
+    # type: (...) -> Iterator[str]
+    find_links = find_links or []
+    skip_match = None
+
+    if skip_regex:
+        skip_match = re.compile(skip_regex).search
+
+    for link in find_links:
+        yield '-f %s' % link
+    installations = {}  # type: Dict[str, FrozenRequirement]
+    for dist in get_installed_distributions(local_only=local_only,
+                                            skip=(),
+                                            user_only=user_only,
+                                            paths=paths):
+        try:
+            req = FrozenRequirement.from_dist(dist)
+        except RequirementParseError as exc:
+            # We include dist rather than dist.project_name because the
+            # dist string includes more information, like the version and
+            # location. We also include the exception message to aid
+            # troubleshooting.
+            logger.warning(
+                'Could not generate requirement for distribution %r: %s',
+                dist, exc
+            )
+            continue
+        if exclude_editable and req.editable:
+            continue
+        installations[req.name] = req
+
+    if requirement:
+        # the options that don't get turned into an InstallRequirement
+        # should only be emitted once, even if the same option is in multiple
+        # requirements files, so we need to keep track of what has been emitted
+        # so that we don't emit it again if it's seen again
+        emitted_options = set()  # type: Set[str]
+        # keep track of which files a requirement is in so that we can
+        # give an accurate warning if a requirement appears multiple times.
+        req_files = collections.defaultdict(list)  # type: Dict[str, List[str]]
+        for req_file_path in requirement:
+            with open(req_file_path) as req_file:
+                for line in req_file:
+                    if (not line.strip() or
+                            line.strip().startswith('#') or
+                            (skip_match and skip_match(line)) or
+                            line.startswith((
+                                '-r', '--requirement',
+                                '-Z', '--always-unzip',
+                                '-f', '--find-links',
+                                '-i', '--index-url',
+                                '--pre',
+                                '--trusted-host',
+                                '--process-dependency-links',
+                                '--extra-index-url'))):
+                        line = line.rstrip()
+                        if line not in emitted_options:
+                            emitted_options.add(line)
+                            yield line
+                        continue
+
+                    if line.startswith('-e') or line.startswith('--editable'):
+                        if line.startswith('-e'):
+                            line = line[2:].strip()
+                        else:
+                            line = line[len('--editable'):].strip().lstrip('=')
+                        line_req = install_req_from_editable(
+                            line,
+                            isolated=isolated,
+                            wheel_cache=wheel_cache,
+                        )
+                    else:
+                        line_req = install_req_from_line(
+                            COMMENT_RE.sub('', line).strip(),
+                            isolated=isolated,
+                            wheel_cache=wheel_cache,
+                        )
+
+                    if not line_req.name:
+                        logger.info(
+                            "Skipping line in requirement file [%s] because "
+                            "it's not clear what it would install: %s",
+                            req_file_path, line.strip(),
+                        )
+                        logger.info(
+                            "  (add #egg=PackageName to the URL to avoid"
+                            " this warning)"
+                        )
+                    elif line_req.name not in installations:
+                        # either it's not installed, or it is installed
+                        # but has been processed already
+                        if not req_files[line_req.name]:
+                            logger.warning(
+                                "Requirement file [%s] contains %s, but "
+                                "package %r is not installed",
+                                req_file_path,
+                                COMMENT_RE.sub('', line).strip(), line_req.name
+                            )
+                        else:
+                            req_files[line_req.name].append(req_file_path)
+                    else:
+                        yield str(installations[line_req.name]).rstrip()
+                        del installations[line_req.name]
+                        req_files[line_req.name].append(req_file_path)
+
+        # Warn about requirements that were included multiple times (in a
+        # single requirements file or in different requirements files).
+        for name, files in six.iteritems(req_files):
+            if len(files) > 1:
+                logger.warning("Requirement %s included multiple times [%s]",
+                               name, ', '.join(sorted(set(files))))
+
+        yield(
+            '## The following requirements were added by '
+            'pip freeze:'
+        )
+    for installation in sorted(
+            installations.values(), key=lambda x: x.name.lower()):
+        if canonicalize_name(installation.name) not in skip:
+            yield str(installation).rstrip()
+
+
+def get_requirement_info(dist):
+    # type: (Distribution) -> RequirementInfo
+    """
+    Compute and return values (req, editable, comments) for use in
+    FrozenRequirement.from_dist().
+    """
+    if not dist_is_editable(dist):
+        return (None, False, [])
+
+    location = os.path.normcase(os.path.abspath(dist.location))
+
+    from pip._internal.vcs import vcs, RemoteNotFoundError
+    vcs_backend = vcs.get_backend_for_dir(location)
+
+    if vcs_backend is None:
+        req = dist.as_requirement()
+        logger.debug(
+            'No VCS found for editable requirement "%s" in: %r', req,
+            location,
+        )
+        comments = [
+            '# Editable install with no version control ({})'.format(req)
+        ]
+        return (location, True, comments)
+
+    try:
+        req = vcs_backend.get_src_requirement(location, dist.project_name)
+    except RemoteNotFoundError:
+        req = dist.as_requirement()
+        comments = [
+            '# Editable {} install with no remote ({})'.format(
+                type(vcs_backend).__name__, req,
+            )
+        ]
+        return (location, True, comments)
+
+    except BadCommand:
+        logger.warning(
+            'cannot determine version of editable source in %s '
+            '(%s command not found in path)',
+            location,
+            vcs_backend.name,
+        )
+        return (None, True, [])
+
+    except InstallationError as exc:
+        logger.warning(
+            "Error when trying to get requirement for VCS system %s, "
+            "falling back to uneditable format", exc
+        )
+    else:
+        if req is not None:
+            return (req, True, [])
+
+    logger.warning(
+        'Could not determine repository location of %s', location
+    )
+    comments = ['## !! Could not determine repository location']
+
+    return (None, False, comments)
+
+
+class FrozenRequirement(object):
+    def __init__(self, name, req, editable, comments=()):
+        # type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
+        self.name = name
+        self.req = req
+        self.editable = editable
+        self.comments = comments
+
+    @classmethod
+    def from_dist(cls, dist):
+        # type: (Distribution) -> FrozenRequirement
+        req, editable, comments = get_requirement_info(dist)
+        if req is None:
+            req = dist.as_requirement()
+
+        return cls(dist.project_name, req, editable, comments=comments)
+
+    def __str__(self):
+        req = self.req
+        if self.editable:
+            req = '-e %s' % req
+        return '\n'.join(list(self.comments) + [str(req)]) + '\n'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/prepare.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/prepare.py
new file mode 100644
index 00000000..6cf5f0ed
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/operations/prepare.py
@@ -0,0 +1,287 @@
+"""Prepares a distribution for installation
+"""
+
+import logging
+import os
+
+from pip._vendor import requests
+
+from pip._internal.distributions import (
+    make_distribution_for_install_requirement,
+)
+from pip._internal.distributions.installed import InstalledDistribution
+from pip._internal.download import (
+    is_dir_url, is_file_url, is_vcs_url, unpack_url, url_to_path,
+)
+from pip._internal.exceptions import (
+    DirectoryUrlHashUnsupported, HashUnpinned, InstallationError,
+    PreviousBuildDirError, VcsHashUnsupported,
+)
+from pip._internal.utils.compat import expanduser
+from pip._internal.utils.hashes import MissingHashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import display_path, normalize_path
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+
+    from pip._internal.distributions import AbstractDistribution
+    from pip._internal.download import PipSession
+    from pip._internal.index import PackageFinder
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.req.req_tracker import RequirementTracker
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementPreparer(object):
+    """Prepares a Requirement
+    """
+
+    def __init__(
+        self,
+        build_dir,  # type: str
+        download_dir,  # type: Optional[str]
+        src_dir,  # type: str
+        wheel_download_dir,  # type: Optional[str]
+        progress_bar,  # type: str
+        build_isolation,  # type: bool
+        req_tracker  # type: RequirementTracker
+    ):
+        # type: (...) -> None
+        super(RequirementPreparer, self).__init__()
+
+        self.src_dir = src_dir
+        self.build_dir = build_dir
+        self.req_tracker = req_tracker
+
+        # Where still packed archives should be written to. If None, they are
+        # not saved, and are deleted immediately after unpacking.
+        self.download_dir = download_dir
+
+        # Where still-packed .whl files should be written to. If None, they are
+        # written to the download_dir parameter. Separate to download_dir to
+        # permit only keeping wheel archives for pip wheel.
+        if wheel_download_dir:
+            wheel_download_dir = normalize_path(wheel_download_dir)
+        self.wheel_download_dir = wheel_download_dir
+
+        # NOTE
+        # download_dir and wheel_download_dir overlap semantically and may
+        # be combined if we're willing to have non-wheel archives present in
+        # the wheelhouse output by 'pip wheel'.
+
+        self.progress_bar = progress_bar
+
+        # Is build isolation allowed?
+        self.build_isolation = build_isolation
+
+    @property
+    def _download_should_save(self):
+        # type: () -> bool
+        # TODO: Modify to reduce indentation needed
+        if self.download_dir:
+            self.download_dir = expanduser(self.download_dir)
+            if os.path.exists(self.download_dir):
+                return True
+            else:
+                logger.critical('Could not find download directory')
+                raise InstallationError(
+                    "Could not find or access download directory '%s'"
+                    % display_path(self.download_dir))
+        return False
+
+    def prepare_linked_requirement(
+        self,
+        req,  # type: InstallRequirement
+        session,  # type: PipSession
+        finder,  # type: PackageFinder
+        upgrade_allowed,  # type: bool
+        require_hashes  # type: bool
+    ):
+        # type: (...) -> AbstractDistribution
+        """Prepare a requirement that would be obtained from req.link
+        """
+        # TODO: Breakup into smaller functions
+        if req.link and req.link.scheme == 'file':
+            path = url_to_path(req.link.url)
+            logger.info('Processing %s', display_path(path))
+        else:
+            logger.info('Collecting %s', req)
+
+        with indent_log():
+            # @@ if filesystem packages are not marked
+            # editable in a req, a non deterministic error
+            # occurs when the script attempts to unpack the
+            # build directory
+            req.ensure_has_source_dir(self.build_dir)
+            # If a checkout exists, it's unwise to keep going.  version
+            # inconsistencies are logged later, but do not fail the
+            # installation.
+            # FIXME: this won't upgrade when there's an existing
+            # package unpacked in `req.source_dir`
+            # package unpacked in `req.source_dir`
+            if os.path.exists(os.path.join(req.source_dir, 'setup.py')):
+                raise PreviousBuildDirError(
+                    "pip can't proceed with requirements '%s' due to a"
+                    " pre-existing build directory (%s). This is "
+                    "likely due to a previous installation that failed"
+                    ". pip is being responsible and not assuming it "
+                    "can delete this. Please delete it and try again."
+                    % (req, req.source_dir)
+                )
+            req.populate_link(finder, upgrade_allowed, require_hashes)
+
+            # We can't hit this spot and have populate_link return None.
+            # req.satisfied_by is None here (because we're
+            # guarded) and upgrade has no impact except when satisfied_by
+            # is not None.
+            # Then inside find_requirement existing_applicable -> False
+            # If no new versions are found, DistributionNotFound is raised,
+            # otherwise a result is guaranteed.
+            assert req.link
+            link = req.link
+
+            # Now that we have the real link, we can tell what kind of
+            # requirements we have and raise some more informative errors
+            # than otherwise. (For example, we can raise VcsHashUnsupported
+            # for a VCS URL rather than HashMissing.)
+            if require_hashes:
+                # We could check these first 2 conditions inside
+                # unpack_url and save repetition of conditions, but then
+                # we would report less-useful error messages for
+                # unhashable requirements, complaining that there's no
+                # hash provided.
+                if is_vcs_url(link):
+                    raise VcsHashUnsupported()
+                elif is_file_url(link) and is_dir_url(link):
+                    raise DirectoryUrlHashUnsupported()
+                if not req.original_link and not req.is_pinned:
+                    # Unpinned packages are asking for trouble when a new
+                    # version is uploaded. This isn't a security check, but
+                    # it saves users a surprising hash mismatch in the
+                    # future.
+                    #
+                    # file:/// URLs aren't pinnable, so don't complain
+                    # about them not being pinned.
+                    raise HashUnpinned()
+
+            hashes = req.hashes(trust_internet=not require_hashes)
+            if require_hashes and not hashes:
+                # Known-good hashes are missing for this requirement, so
+                # shim it with a facade object that will provoke hash
+                # computation and then raise a HashMissing exception
+                # showing the user what the hash should be.
+                hashes = MissingHashes()
+
+            try:
+                download_dir = self.download_dir
+                # We always delete unpacked sdists after pip ran.
+                autodelete_unpacked = True
+                if req.link.is_wheel and self.wheel_download_dir:
+                    # when doing 'pip wheel` we download wheels to a
+                    # dedicated dir.
+                    download_dir = self.wheel_download_dir
+                if req.link.is_wheel:
+                    if download_dir:
+                        # When downloading, we only unpack wheels to get
+                        # metadata.
+                        autodelete_unpacked = True
+                    else:
+                        # When installing a wheel, we use the unpacked
+                        # wheel.
+                        autodelete_unpacked = False
+                unpack_url(
+                    req.link, req.source_dir,
+                    download_dir, autodelete_unpacked,
+                    session=session, hashes=hashes,
+                    progress_bar=self.progress_bar
+                )
+            except requests.HTTPError as exc:
+                logger.critical(
+                    'Could not install requirement %s because of error %s',
+                    req,
+                    exc,
+                )
+                raise InstallationError(
+                    'Could not install requirement %s because of HTTP '
+                    'error %s for URL %s' %
+                    (req, exc, req.link)
+                )
+            abstract_dist = make_distribution_for_install_requirement(req)
+            with self.req_tracker.track(req):
+                abstract_dist.prepare_distribution_metadata(
+                    finder, self.build_isolation,
+                )
+            if self._download_should_save:
+                # Make a .zip of the source_dir we already created.
+                if not req.link.is_artifact:
+                    req.archive(self.download_dir)
+        return abstract_dist
+
+    def prepare_editable_requirement(
+        self,
+        req,  # type: InstallRequirement
+        require_hashes,  # type: bool
+        use_user_site,  # type: bool
+        finder  # type: PackageFinder
+    ):
+        # type: (...) -> AbstractDistribution
+        """Prepare an editable requirement
+        """
+        assert req.editable, "cannot prepare a non-editable req as editable"
+
+        logger.info('Obtaining %s', req)
+
+        with indent_log():
+            if require_hashes:
+                raise InstallationError(
+                    'The editable requirement %s cannot be installed when '
+                    'requiring hashes, because there is no single file to '
+                    'hash.' % req
+                )
+            req.ensure_has_source_dir(self.src_dir)
+            req.update_editable(not self._download_should_save)
+
+            abstract_dist = make_distribution_for_install_requirement(req)
+            with self.req_tracker.track(req):
+                abstract_dist.prepare_distribution_metadata(
+                    finder, self.build_isolation,
+                )
+
+            if self._download_should_save:
+                req.archive(self.download_dir)
+            req.check_if_exists(use_user_site)
+
+        return abstract_dist
+
+    def prepare_installed_requirement(
+        self,
+        req,  # type: InstallRequirement
+        require_hashes,  # type: bool
+        skip_reason  # type: str
+    ):
+        # type: (...) -> AbstractDistribution
+        """Prepare an already-installed requirement
+        """
+        assert req.satisfied_by, "req should have been satisfied but isn't"
+        assert skip_reason is not None, (
+            "did not get skip reason skipped but req.satisfied_by "
+            "is set to %r" % (req.satisfied_by,)
+        )
+        logger.info(
+            'Requirement %s: %s (%s)',
+            skip_reason, req, req.satisfied_by.version
+        )
+        with indent_log():
+            if require_hashes:
+                logger.debug(
+                    'Since it is already installed, we are trusting this '
+                    'package without checking its hash. To ensure a '
+                    'completely repeatable environment, install into an '
+                    'empty virtualenv.'
+                )
+            abstract_dist = InstalledDistribution(req)
+
+        return abstract_dist
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pep425tags.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pep425tags.py
new file mode 100644
index 00000000..07dc148e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pep425tags.py
@@ -0,0 +1,387 @@
+"""Generate and work with PEP 425 Compatibility Tags."""
+from __future__ import absolute_import
+
+import distutils.util
+import logging
+import platform
+import re
+import sys
+import sysconfig
+import warnings
+from collections import OrderedDict
+
+import pip._internal.utils.glibc
+from pip._internal.utils.compat import get_extension_suffixes
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Tuple, Callable, List, Optional, Union, Dict
+    )
+
+    Pep425Tag = Tuple[str, str, str]
+
+logger = logging.getLogger(__name__)
+
+_osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
+
+
+def get_config_var(var):
+    # type: (str) -> Optional[str]
+    try:
+        return sysconfig.get_config_var(var)
+    except IOError as e:  # Issue #1074
+        warnings.warn("{}".format(e), RuntimeWarning)
+        return None
+
+
+def get_abbr_impl():
+    # type: () -> str
+    """Return abbreviated implementation name."""
+    if hasattr(sys, 'pypy_version_info'):
+        pyimpl = 'pp'
+    elif sys.platform.startswith('java'):
+        pyimpl = 'jy'
+    elif sys.platform == 'cli':
+        pyimpl = 'ip'
+    else:
+        pyimpl = 'cp'
+    return pyimpl
+
+
+def version_info_to_nodot(version_info):
+    # type: (Tuple[int, ...]) -> str
+    # Only use up to the first two numbers.
+    return ''.join(map(str, version_info[:2]))
+
+
+def get_impl_ver():
+    # type: () -> str
+    """Return implementation version."""
+    impl_ver = get_config_var("py_version_nodot")
+    if not impl_ver or get_abbr_impl() == 'pp':
+        impl_ver = ''.join(map(str, get_impl_version_info()))
+    return impl_ver
+
+
+def get_impl_version_info():
+    # type: () -> Tuple[int, ...]
+    """Return sys.version_info-like tuple for use in decrementing the minor
+    version."""
+    if get_abbr_impl() == 'pp':
+        # as per https://github.com/pypa/pip/issues/2882
+        # attrs exist only on pypy
+        return (sys.version_info[0],
+                sys.pypy_version_info.major,  # type: ignore
+                sys.pypy_version_info.minor)  # type: ignore
+    else:
+        return sys.version_info[0], sys.version_info[1]
+
+
+def get_impl_tag():
+    # type: () -> str
+    """
+    Returns the Tag for this specific implementation.
+    """
+    return "{}{}".format(get_abbr_impl(), get_impl_ver())
+
+
+def get_flag(var, fallback, expected=True, warn=True):
+    # type: (str, Callable[..., bool], Union[bool, int], bool) -> bool
+    """Use a fallback method for determining SOABI flags if the needed config
+    var is unset or unavailable."""
+    val = get_config_var(var)
+    if val is None:
+        if warn:
+            logger.debug("Config variable '%s' is unset, Python ABI tag may "
+                         "be incorrect", var)
+        return fallback()
+    return val == expected
+
+
+def get_abi_tag():
+    # type: () -> Optional[str]
+    """Return the ABI tag based on SOABI (if available) or emulate SOABI
+    (CPython 2, PyPy)."""
+    soabi = get_config_var('SOABI')
+    impl = get_abbr_impl()
+    if not soabi and impl in {'cp', 'pp'} and hasattr(sys, 'maxunicode'):
+        d = ''
+        m = ''
+        u = ''
+        if get_flag('Py_DEBUG',
+                    lambda: hasattr(sys, 'gettotalrefcount'),
+                    warn=(impl == 'cp')):
+            d = 'd'
+        if get_flag('WITH_PYMALLOC',
+                    lambda: impl == 'cp',
+                    warn=(impl == 'cp')):
+            m = 'm'
+        if get_flag('Py_UNICODE_SIZE',
+                    lambda: sys.maxunicode == 0x10ffff,
+                    expected=4,
+                    warn=(impl == 'cp' and
+                          sys.version_info < (3, 3))) \
+                and sys.version_info < (3, 3):
+            u = 'u'
+        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
+    elif soabi and soabi.startswith('cpython-'):
+        abi = 'cp' + soabi.split('-')[1]
+    elif soabi:
+        abi = soabi.replace('.', '_').replace('-', '_')
+    else:
+        abi = None
+    return abi
+
+
+def _is_running_32bit():
+    # type: () -> bool
+    return sys.maxsize == 2147483647
+
+
+def get_platform():
+    # type: () -> str
+    """Return our platform name 'win32', 'linux_x86_64'"""
+    if sys.platform == 'darwin':
+        # distutils.util.get_platform() returns the release based on the value
+        # of MACOSX_DEPLOYMENT_TARGET on which Python was built, which may
+        # be significantly older than the user's current machine.
+        release, _, machine = platform.mac_ver()
+        split_ver = release.split('.')
+
+        if machine == "x86_64" and _is_running_32bit():
+            machine = "i386"
+        elif machine == "ppc64" and _is_running_32bit():
+            machine = "ppc"
+
+        return 'macosx_{}_{}_{}'.format(split_ver[0], split_ver[1], machine)
+
+    # XXX remove distutils dependency
+    result = distutils.util.get_platform().replace('.', '_').replace('-', '_')
+    if result == "linux_x86_64" and _is_running_32bit():
+        # 32 bit Python program (running on a 64 bit Linux): pip should only
+        # install and run 32 bit compiled extensions in that case.
+        result = "linux_i686"
+
+    return result
+
+
+def is_manylinux1_compatible():
+    # type: () -> bool
+    # Only Linux, and only x86-64 / i686
+    if get_platform() not in {"linux_x86_64", "linux_i686"}:
+        return False
+
+    # Check for presence of _manylinux module
+    try:
+        import _manylinux
+        return bool(_manylinux.manylinux1_compatible)
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below
+        pass
+
+    # Check glibc version. CentOS 5 uses glibc 2.5.
+    return pip._internal.utils.glibc.have_compatible_glibc(2, 5)
+
+
+def is_manylinux2010_compatible():
+    # type: () -> bool
+    # Only Linux, and only x86-64 / i686
+    if get_platform() not in {"linux_x86_64", "linux_i686"}:
+        return False
+
+    # Check for presence of _manylinux module
+    try:
+        import _manylinux
+        return bool(_manylinux.manylinux2010_compatible)
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below
+        pass
+
+    # Check glibc version. CentOS 6 uses glibc 2.12.
+    return pip._internal.utils.glibc.have_compatible_glibc(2, 12)
+
+
+def get_darwin_arches(major, minor, machine):
+    # type: (int, int, str) -> List[str]
+    """Return a list of supported arches (including group arches) for
+    the given major, minor and machine architecture of an macOS machine.
+    """
+    arches = []
+
+    def _supports_arch(major, minor, arch):
+        # type: (int, int, str) -> bool
+        # Looking at the application support for macOS versions in the chart
+        # provided by https://en.wikipedia.org/wiki/OS_X#Versions it appears
+        # our timeline looks roughly like:
+        #
+        # 10.0 - Introduces ppc support.
+        # 10.4 - Introduces ppc64, i386, and x86_64 support, however the ppc64
+        #        and x86_64 support is CLI only, and cannot be used for GUI
+        #        applications.
+        # 10.5 - Extends ppc64 and x86_64 support to cover GUI applications.
+        # 10.6 - Drops support for ppc64
+        # 10.7 - Drops support for ppc
+        #
+        # Given that we do not know if we're installing a CLI or a GUI
+        # application, we must be conservative and assume it might be a GUI
+        # application and behave as if ppc64 and x86_64 support did not occur
+        # until 10.5.
+        #
+        # Note: The above information is taken from the "Application support"
+        #       column in the chart not the "Processor support" since I believe
+        #       that we care about what instruction sets an application can use
+        #       not which processors the OS supports.
+        if arch == 'ppc':
+            return (major, minor) <= (10, 5)
+        if arch == 'ppc64':
+            return (major, minor) == (10, 5)
+        if arch == 'i386':
+            return (major, minor) >= (10, 4)
+        if arch == 'x86_64':
+            return (major, minor) >= (10, 5)
+        if arch in groups:
+            for garch in groups[arch]:
+                if _supports_arch(major, minor, garch):
+                    return True
+        return False
+
+    groups = OrderedDict([
+        ("fat", ("i386", "ppc")),
+        ("intel", ("x86_64", "i386")),
+        ("fat64", ("x86_64", "ppc64")),
+        ("fat32", ("x86_64", "i386", "ppc")),
+    ])  # type: Dict[str, Tuple[str, ...]]
+
+    if _supports_arch(major, minor, machine):
+        arches.append(machine)
+
+    for garch in groups:
+        if machine in groups[garch] and _supports_arch(major, minor, garch):
+            arches.append(garch)
+
+    arches.append('universal')
+
+    return arches
+
+
+def get_all_minor_versions_as_strings(version_info):
+    # type: (Tuple[int, ...]) -> List[str]
+    versions = []
+    major = version_info[:-1]
+    # Support all previous minor Python versions.
+    for minor in range(version_info[-1], -1, -1):
+        versions.append(''.join(map(str, major + (minor,))))
+    return versions
+
+
+def get_supported(
+    versions=None,  # type: Optional[List[str]]
+    noarch=False,  # type: bool
+    platform=None,  # type: Optional[str]
+    impl=None,  # type: Optional[str]
+    abi=None  # type: Optional[str]
+):
+    # type: (...) -> List[Pep425Tag]
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param versions: a list of string versions, of the form ["33", "32"],
+        or None. The first version will be assumed to support our ABI.
+    :param platform: specify the exact platform you want valid
+        tags for, or None. If None, use the local system platform.
+    :param impl: specify the exact implementation you want valid
+        tags for, or None. If None, use the local interpreter impl.
+    :param abi: specify the exact abi you want valid
+        tags for, or None. If None, use the local interpreter abi.
+    """
+    supported = []
+
+    # Versions must be given with respect to the preference
+    if versions is None:
+        version_info = get_impl_version_info()
+        versions = get_all_minor_versions_as_strings(version_info)
+
+    impl = impl or get_abbr_impl()
+
+    abis = []  # type: List[str]
+
+    abi = abi or get_abi_tag()
+    if abi:
+        abis[0:0] = [abi]
+
+    abi3s = set()
+    for suffix in get_extension_suffixes():
+        if suffix.startswith('.abi'):
+            abi3s.add(suffix.split('.', 2)[1])
+
+    abis.extend(sorted(list(abi3s)))
+
+    abis.append('none')
+
+    if not noarch:
+        arch = platform or get_platform()
+        arch_prefix, arch_sep, arch_suffix = arch.partition('_')
+        if arch.startswith('macosx'):
+            # support macosx-10.6-intel on macosx-10.9-x86_64
+            match = _osx_arch_pat.match(arch)
+            if match:
+                name, major, minor, actual_arch = match.groups()
+                tpl = '{}_{}_%i_%s'.format(name, major)
+                arches = []
+                for m in reversed(range(int(minor) + 1)):
+                    for a in get_darwin_arches(int(major), m, actual_arch):
+                        arches.append(tpl % (m, a))
+            else:
+                # arch pattern didn't match (?!)
+                arches = [arch]
+        elif arch_prefix == 'manylinux2010':
+            # manylinux1 wheels run on most manylinux2010 systems with the
+            # exception of wheels depending on ncurses. PEP 571 states
+            # manylinux1 wheels should be considered manylinux2010 wheels:
+            # https://www.python.org/dev/peps/pep-0571/#backwards-compatibility-with-manylinux1-wheels
+            arches = [arch, 'manylinux1' + arch_sep + arch_suffix]
+        elif platform is None:
+            arches = []
+            if is_manylinux2010_compatible():
+                arches.append('manylinux2010' + arch_sep + arch_suffix)
+            if is_manylinux1_compatible():
+                arches.append('manylinux1' + arch_sep + arch_suffix)
+            arches.append(arch)
+        else:
+            arches = [arch]
+
+        # Current version, current API (built specifically for our Python):
+        for abi in abis:
+            for arch in arches:
+                supported.append(('%s%s' % (impl, versions[0]), abi, arch))
+
+        # abi3 modules compatible with older version of Python
+        for version in versions[1:]:
+            # abi3 was introduced in Python 3.2
+            if version in {'31', '30'}:
+                break
+            for abi in abi3s:   # empty set if not Python 3
+                for arch in arches:
+                    supported.append(("%s%s" % (impl, version), abi, arch))
+
+        # Has binaries, does not use the Python API:
+        for arch in arches:
+            supported.append(('py%s' % (versions[0][0]), 'none', arch))
+
+    # No abi / arch, but requires our implementation:
+    supported.append(('%s%s' % (impl, versions[0]), 'none', 'any'))
+    # Tagged specifically as being cross-version compatible
+    # (with just the major version specified)
+    supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
+
+    # No abi / arch, generic Python
+    for i, version in enumerate(versions):
+        supported.append(('py%s' % (version,), 'none', 'any'))
+        if i == 0:
+            supported.append(('py%s' % (version[0]), 'none', 'any'))
+
+    return supported
+
+
+implementation_tag = get_impl_tag()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pyproject.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pyproject.py
new file mode 100644
index 00000000..43efbed4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/pyproject.py
@@ -0,0 +1,171 @@
+from __future__ import absolute_import
+
+import io
+import os
+import sys
+
+from pip._vendor import pytoml, six
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Tuple, Optional, List
+
+
+def _is_list_of_str(obj):
+    # type: (Any) -> bool
+    return (
+        isinstance(obj, list) and
+        all(isinstance(item, six.string_types) for item in obj)
+    )
+
+
+def make_pyproject_path(setup_py_dir):
+    # type: (str) -> str
+    path = os.path.join(setup_py_dir, 'pyproject.toml')
+
+    # Python2 __file__ should not be unicode
+    if six.PY2 and isinstance(path, six.text_type):
+        path = path.encode(sys.getfilesystemencoding())
+
+    return path
+
+
+def load_pyproject_toml(
+    use_pep517,  # type: Optional[bool]
+    pyproject_toml,  # type: str
+    setup_py,  # type: str
+    req_name  # type: str
+):
+    # type: (...) -> Optional[Tuple[List[str], str, List[str]]]
+    """Load the pyproject.toml file.
+
+    Parameters:
+        use_pep517 - Has the user requested PEP 517 processing? None
+                     means the user hasn't explicitly specified.
+        pyproject_toml - Location of the project's pyproject.toml file
+        setup_py - Location of the project's setup.py file
+        req_name - The name of the requirement we're processing (for
+                   error reporting)
+
+    Returns:
+        None if we should use the legacy code path, otherwise a tuple
+        (
+            requirements from pyproject.toml,
+            name of PEP 517 backend,
+            requirements we should check are installed after setting
+                up the build environment
+        )
+    """
+    has_pyproject = os.path.isfile(pyproject_toml)
+    has_setup = os.path.isfile(setup_py)
+
+    if has_pyproject:
+        with io.open(pyproject_toml, encoding="utf-8") as f:
+            pp_toml = pytoml.load(f)
+        build_system = pp_toml.get("build-system")
+    else:
+        build_system = None
+
+    # The following cases must use PEP 517
+    # We check for use_pep517 being non-None and falsey because that means
+    # the user explicitly requested --no-use-pep517.  The value 0 as
+    # opposed to False can occur when the value is provided via an
+    # environment variable or config file option (due to the quirk of
+    # strtobool() returning an integer in pip's configuration code).
+    if has_pyproject and not has_setup:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project does not have a setup.py"
+            )
+        use_pep517 = True
+    elif build_system and "build-backend" in build_system:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project specifies a build backend of {} "
+                "in pyproject.toml".format(
+                    build_system["build-backend"]
+                )
+            )
+        use_pep517 = True
+
+    # If we haven't worked out whether to use PEP 517 yet,
+    # and the user hasn't explicitly stated a preference,
+    # we do so if the project has a pyproject.toml file.
+    elif use_pep517 is None:
+        use_pep517 = has_pyproject
+
+    # At this point, we know whether we're going to use PEP 517.
+    assert use_pep517 is not None
+
+    # If we're using the legacy code path, there is nothing further
+    # for us to do here.
+    if not use_pep517:
+        return None
+
+    if build_system is None:
+        # Either the user has a pyproject.toml with no build-system
+        # section, or the user has no pyproject.toml, but has opted in
+        # explicitly via --use-pep517.
+        # In the absence of any explicit backend specification, we
+        # assume the setuptools backend that most closely emulates the
+        # traditional direct setup.py execution, and require wheel and
+        # a version of setuptools that supports that backend.
+
+        build_system = {
+            "requires": ["setuptools>=40.8.0", "wheel"],
+            "build-backend": "setuptools.build_meta:__legacy__",
+        }
+
+    # If we're using PEP 517, we have build system information (either
+    # from pyproject.toml, or defaulted by the code above).
+    # Note that at this point, we do not know if the user has actually
+    # specified a backend, though.
+    assert build_system is not None
+
+    # Ensure that the build-system section in pyproject.toml conforms
+    # to PEP 518.
+    error_template = (
+        "{package} has a pyproject.toml file that does not comply "
+        "with PEP 518: {reason}"
+    )
+
+    # Specifying the build-system table but not the requires key is invalid
+    if "requires" not in build_system:
+        raise InstallationError(
+            error_template.format(package=req_name, reason=(
+                "it has a 'build-system' table but not "
+                "'build-system.requires' which is mandatory in the table"
+            ))
+        )
+
+    # Error out if requires is not a list of strings
+    requires = build_system["requires"]
+    if not _is_list_of_str(requires):
+        raise InstallationError(error_template.format(
+            package=req_name,
+            reason="'build-system.requires' is not a list of strings.",
+        ))
+
+    backend = build_system.get("build-backend")
+    check = []  # type: List[str]
+    if backend is None:
+        # If the user didn't specify a backend, we assume they want to use
+        # the setuptools backend. But we can't be sure they have included
+        # a version of setuptools which supplies the backend, or wheel
+        # (which is needed by the backend) in their requirements. So we
+        # make a note to check that those requirements are present once
+        # we have set up the environment.
+        # This is quite a lot of work to check for a very specific case. But
+        # the problem is, that case is potentially quite common - projects that
+        # adopted PEP 518 early for the ability to specify requirements to
+        # execute setup.py, but never considered needing to mention the build
+        # tools themselves. The original PEP 518 code had a similar check (but
+        # implemented in a different way).
+        backend = "setuptools.build_meta:__legacy__"
+        check = ["setuptools>=40.8.0", "wheel"]
+
+    return (requires, backend, check)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__init__.py
new file mode 100644
index 00000000..c39f63fa
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__init__.py
@@ -0,0 +1,78 @@
+from __future__ import absolute_import
+
+import logging
+
+from .req_install import InstallRequirement
+from .req_set import RequirementSet
+from .req_file import parse_requirements
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, List, Sequence
+
+__all__ = [
+    "RequirementSet", "InstallRequirement",
+    "parse_requirements", "install_given_reqs",
+]
+
+logger = logging.getLogger(__name__)
+
+
+def install_given_reqs(
+    to_install,  # type: List[InstallRequirement]
+    install_options,  # type: List[str]
+    global_options=(),  # type: Sequence[str]
+    *args,  # type: Any
+    **kwargs  # type: Any
+):
+    # type: (...) -> List[InstallRequirement]
+    """
+    Install everything in the given list.
+
+    (to be called after having downloaded and unpacked the packages)
+    """
+
+    if to_install:
+        logger.info(
+            'Installing collected packages: %s',
+            ', '.join([req.name for req in to_install]),
+        )
+
+    with indent_log():
+        for requirement in to_install:
+            if requirement.conflicts_with:
+                logger.info(
+                    'Found existing installation: %s',
+                    requirement.conflicts_with,
+                )
+                with indent_log():
+                    uninstalled_pathset = requirement.uninstall(
+                        auto_confirm=True
+                    )
+            try:
+                requirement.install(
+                    install_options,
+                    global_options,
+                    *args,
+                    **kwargs
+                )
+            except Exception:
+                should_rollback = (
+                    requirement.conflicts_with and
+                    not requirement.install_succeeded
+                )
+                # if install did not succeed, rollback previous uninstall
+                if should_rollback:
+                    uninstalled_pathset.rollback()
+                raise
+            else:
+                should_commit = (
+                    requirement.conflicts_with and
+                    requirement.install_succeeded
+                )
+                if should_commit:
+                    uninstalled_pathset.commit()
+            requirement.remove_temporary_source()
+
+    return to_install
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..fee124c0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/constructors.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/constructors.cpython-37.pyc
new file mode 100644
index 00000000..7c20dade
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/constructors.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_file.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_file.cpython-37.pyc
new file mode 100644
index 00000000..c6146ec7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_file.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_install.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_install.cpython-37.pyc
new file mode 100644
index 00000000..f7b8a6ef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_install.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_set.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_set.cpython-37.pyc
new file mode 100644
index 00000000..36a3106d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_set.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_tracker.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_tracker.cpython-37.pyc
new file mode 100644
index 00000000..eec20425
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_tracker.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_uninstall.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_uninstall.cpython-37.pyc
new file mode 100644
index 00000000..83068d48
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/__pycache__/req_uninstall.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/constructors.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/constructors.py
new file mode 100644
index 00000000..cd0ab504
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/constructors.py
@@ -0,0 +1,349 @@
+"""Backing implementation for InstallRequirement's various constructors
+
+The idea here is that these formed a major chunk of InstallRequirement's size
+so, moving them and support code dedicated to them outside of that class
+helps creates for better understandability for the rest of the code.
+
+These are meant to be used elsewhere within pip to create instances of
+InstallRequirement.
+"""
+
+import logging
+import os
+import re
+
+from pip._vendor.packaging.markers import Marker
+from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
+from pip._vendor.packaging.specifiers import Specifier
+from pip._vendor.pkg_resources import RequirementParseError, parse_requirements
+
+from pip._internal.download import is_archive_file, is_url, url_to_path
+from pip._internal.exceptions import InstallationError
+from pip._internal.models.index import PyPI, TestPyPI
+from pip._internal.models.link import Link
+from pip._internal.pyproject import make_pyproject_path
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.misc import is_installable_dir, path_to_url
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.vcs import vcs
+from pip._internal.wheel import Wheel
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Optional, Set, Tuple, Union,
+    )
+    from pip._internal.cache import WheelCache
+
+
+__all__ = [
+    "install_req_from_editable", "install_req_from_line",
+    "parse_editable"
+]
+
+logger = logging.getLogger(__name__)
+operators = Specifier._operators.keys()
+
+
+def _strip_extras(path):
+    # type: (str) -> Tuple[str, Optional[str]]
+    m = re.match(r'^(.+)(\[[^\]]+\])$', path)
+    extras = None
+    if m:
+        path_no_extras = m.group(1)
+        extras = m.group(2)
+    else:
+        path_no_extras = path
+
+    return path_no_extras, extras
+
+
+def parse_editable(editable_req):
+    # type: (str) -> Tuple[Optional[str], str, Optional[Set[str]]]
+    """Parses an editable requirement into:
+        - a requirement name
+        - an URL
+        - extras
+        - editable options
+    Accepted requirements:
+        svn+http://blahblah@rev#egg=Foobar[baz]&subdirectory=version_subdir
+        .[some_extra]
+    """
+
+    url = editable_req
+
+    # If a file path is specified with extras, strip off the extras.
+    url_no_extras, extras = _strip_extras(url)
+
+    if os.path.isdir(url_no_extras):
+        if not os.path.exists(os.path.join(url_no_extras, 'setup.py')):
+            msg = (
+                'File "setup.py" not found. Directory cannot be installed '
+                'in editable mode: {}'.format(os.path.abspath(url_no_extras))
+            )
+            pyproject_path = make_pyproject_path(url_no_extras)
+            if os.path.isfile(pyproject_path):
+                msg += (
+                    '\n(A "pyproject.toml" file was found, but editable '
+                    'mode currently requires a setup.py based build.)'
+                )
+            raise InstallationError(msg)
+
+        # Treating it as code that has already been checked out
+        url_no_extras = path_to_url(url_no_extras)
+
+    if url_no_extras.lower().startswith('file:'):
+        package_name = Link(url_no_extras).egg_fragment
+        if extras:
+            return (
+                package_name,
+                url_no_extras,
+                Requirement("placeholder" + extras.lower()).extras,
+            )
+        else:
+            return package_name, url_no_extras, None
+
+    for version_control in vcs:
+        if url.lower().startswith('%s:' % version_control):
+            url = '%s+%s' % (version_control, url)
+            break
+
+    if '+' not in url:
+        raise InstallationError(
+            '{} is not a valid editable requirement. '
+            'It should either be a path to a local project or a VCS URL '
+            '(beginning with svn+, git+, hg+, or bzr+).'.format(editable_req)
+        )
+
+    vc_type = url.split('+', 1)[0].lower()
+
+    if not vcs.get_backend(vc_type):
+        error_message = 'For --editable=%s only ' % editable_req + \
+            ', '.join([backend.name + '+URL' for backend in vcs.backends]) + \
+            ' is currently supported'
+        raise InstallationError(error_message)
+
+    package_name = Link(url).egg_fragment
+    if not package_name:
+        raise InstallationError(
+            "Could not detect requirement name for '%s', please specify one "
+            "with #egg=your_package_name" % editable_req
+        )
+    return package_name, url, None
+
+
+def deduce_helpful_msg(req):
+    # type: (str) -> str
+    """Returns helpful msg in case requirements file does not exist,
+    or cannot be parsed.
+
+    :params req: Requirements file path
+    """
+    msg = ""
+    if os.path.exists(req):
+        msg = " It does exist."
+        # Try to parse and check if it is a requirements file.
+        try:
+            with open(req, 'r') as fp:
+                # parse first line only
+                next(parse_requirements(fp.read()))
+                msg += " The argument you provided " + \
+                    "(%s) appears to be a" % (req) + \
+                    " requirements file. If that is the" + \
+                    " case, use the '-r' flag to install" + \
+                    " the packages specified within it."
+        except RequirementParseError:
+            logger.debug("Cannot parse '%s' as requirements \
+            file" % (req), exc_info=True)
+    else:
+        msg += " File '%s' does not exist." % (req)
+    return msg
+
+
+# ---- The actual constructors follow ----
+
+
+def install_req_from_editable(
+    editable_req,  # type: str
+    comes_from=None,  # type: Optional[str]
+    use_pep517=None,  # type: Optional[bool]
+    isolated=False,  # type: bool
+    options=None,  # type: Optional[Dict[str, Any]]
+    wheel_cache=None,  # type: Optional[WheelCache]
+    constraint=False  # type: bool
+):
+    # type: (...) -> InstallRequirement
+    name, url, extras_override = parse_editable(editable_req)
+    if url.startswith('file:'):
+        source_dir = url_to_path(url)
+    else:
+        source_dir = None
+
+    if name is not None:
+        try:
+            req = Requirement(name)
+        except InvalidRequirement:
+            raise InstallationError("Invalid requirement: '%s'" % name)
+    else:
+        req = None
+    return InstallRequirement(
+        req, comes_from, source_dir=source_dir,
+        editable=True,
+        link=Link(url),
+        constraint=constraint,
+        use_pep517=use_pep517,
+        isolated=isolated,
+        options=options if options else {},
+        wheel_cache=wheel_cache,
+        extras=extras_override or (),
+    )
+
+
+def install_req_from_line(
+    name,  # type: str
+    comes_from=None,  # type: Optional[Union[str, InstallRequirement]]
+    use_pep517=None,  # type: Optional[bool]
+    isolated=False,  # type: bool
+    options=None,  # type: Optional[Dict[str, Any]]
+    wheel_cache=None,  # type: Optional[WheelCache]
+    constraint=False,  # type: bool
+    line_source=None,  # type: Optional[str]
+):
+    # type: (...) -> InstallRequirement
+    """Creates an InstallRequirement from a name, which might be a
+    requirement, directory containing 'setup.py', filename, or URL.
+
+    :param line_source: An optional string describing where the line is from,
+        for logging purposes in case of an error.
+    """
+    if is_url(name):
+        marker_sep = '; '
+    else:
+        marker_sep = ';'
+    if marker_sep in name:
+        name, markers_as_string = name.split(marker_sep, 1)
+        markers_as_string = markers_as_string.strip()
+        if not markers_as_string:
+            markers = None
+        else:
+            markers = Marker(markers_as_string)
+    else:
+        markers = None
+    name = name.strip()
+    req_as_string = None
+    path = os.path.normpath(os.path.abspath(name))
+    link = None
+    extras_as_string = None
+
+    if is_url(name):
+        link = Link(name)
+    else:
+        p, extras_as_string = _strip_extras(path)
+        looks_like_dir = os.path.isdir(p) and (
+            os.path.sep in name or
+            (os.path.altsep is not None and os.path.altsep in name) or
+            name.startswith('.')
+        )
+        if looks_like_dir:
+            if not is_installable_dir(p):
+                raise InstallationError(
+                    "Directory %r is not installable. Neither 'setup.py' "
+                    "nor 'pyproject.toml' found." % name
+                )
+            link = Link(path_to_url(p))
+        elif is_archive_file(p):
+            if not os.path.isfile(p):
+                logger.warning(
+                    'Requirement %r looks like a filename, but the '
+                    'file does not exist',
+                    name
+                )
+            link = Link(path_to_url(p))
+
+    # it's a local file, dir, or url
+    if link:
+        # Handle relative file URLs
+        if link.scheme == 'file' and re.search(r'\.\./', link.url):
+            link = Link(
+                path_to_url(os.path.normpath(os.path.abspath(link.path))))
+        # wheel file
+        if link.is_wheel:
+            wheel = Wheel(link.filename)  # can raise InvalidWheelFilename
+            req_as_string = "%s==%s" % (wheel.name, wheel.version)
+        else:
+            # set the req to the egg fragment.  when it's not there, this
+            # will become an 'unnamed' requirement
+            req_as_string = link.egg_fragment
+
+    # a requirement specifier
+    else:
+        req_as_string = name
+
+    if extras_as_string:
+        extras = Requirement("placeholder" + extras_as_string.lower()).extras
+    else:
+        extras = ()
+    if req_as_string is not None:
+        try:
+            req = Requirement(req_as_string)
+        except InvalidRequirement:
+            if os.path.sep in req_as_string:
+                add_msg = "It looks like a path."
+                add_msg += deduce_helpful_msg(req_as_string)
+            elif ('=' in req_as_string and
+                  not any(op in req_as_string for op in operators)):
+                add_msg = "= is not a valid operator. Did you mean == ?"
+            else:
+                add_msg = ''
+            if line_source is None:
+                source = ''
+            else:
+                source = ' (from {})'.format(line_source)
+            msg = (
+                'Invalid requirement: {!r}{}'.format(req_as_string, source)
+            )
+            if add_msg:
+                msg += '\nHint: {}'.format(add_msg)
+            raise InstallationError(msg)
+    else:
+        req = None
+
+    return InstallRequirement(
+        req, comes_from, link=link, markers=markers,
+        use_pep517=use_pep517, isolated=isolated,
+        options=options if options else {},
+        wheel_cache=wheel_cache,
+        constraint=constraint,
+        extras=extras,
+    )
+
+
+def install_req_from_req_string(
+    req_string,  # type: str
+    comes_from=None,  # type: Optional[InstallRequirement]
+    isolated=False,  # type: bool
+    wheel_cache=None,  # type: Optional[WheelCache]
+    use_pep517=None  # type: Optional[bool]
+):
+    # type: (...) -> InstallRequirement
+    try:
+        req = Requirement(req_string)
+    except InvalidRequirement:
+        raise InstallationError("Invalid requirement: '%s'" % req_string)
+
+    domains_not_allowed = [
+        PyPI.file_storage_domain,
+        TestPyPI.file_storage_domain,
+    ]
+    if (req.url and comes_from and comes_from.link and
+            comes_from.link.netloc in domains_not_allowed):
+        # Explicitly disallow pypi packages that depend on external urls
+        raise InstallationError(
+            "Packages installed from PyPI cannot depend on packages "
+            "which are not also hosted on PyPI.\n"
+            "%s depends on %s " % (comes_from.name, req)
+        )
+
+    return InstallRequirement(
+        req, comes_from, isolated=isolated, wheel_cache=wheel_cache,
+        use_pep517=use_pep517
+    )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_file.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_file.py
new file mode 100644
index 00000000..5a9920fe
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_file.py
@@ -0,0 +1,399 @@
+"""
+Requirements file parsing
+"""
+
+from __future__ import absolute_import
+
+import optparse
+import os
+import re
+import shlex
+import sys
+
+from pip._vendor.six.moves import filterfalse
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.cli import cmdoptions
+from pip._internal.download import get_file_content
+from pip._internal.exceptions import RequirementsFileParseError
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.req.constructors import (
+    install_req_from_editable, install_req_from_line,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Callable, Iterator, List, NoReturn, Optional, Text, Tuple,
+    )
+    from pip._internal.req import InstallRequirement
+    from pip._internal.cache import WheelCache
+    from pip._internal.index import PackageFinder
+    from pip._internal.download import PipSession
+
+    ReqFileLines = Iterator[Tuple[int, Text]]
+
+__all__ = ['parse_requirements']
+
+SCHEME_RE = re.compile(r'^(http|https|file):', re.I)
+COMMENT_RE = re.compile(r'(^|\s+)#.*$')
+
+# Matches environment variable-style values in '${MY_VARIABLE_1}' with the
+# variable name consisting of only uppercase letters, digits or the '_'
+# (underscore). This follows the POSIX standard defined in IEEE Std 1003.1,
+# 2013 Edition.
+ENV_VAR_RE = re.compile(r'(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})')
+
+SUPPORTED_OPTIONS = [
+    cmdoptions.constraints,
+    cmdoptions.editable,
+    cmdoptions.requirements,
+    cmdoptions.no_index,
+    cmdoptions.index_url,
+    cmdoptions.find_links,
+    cmdoptions.extra_index_url,
+    cmdoptions.always_unzip,
+    cmdoptions.no_binary,
+    cmdoptions.only_binary,
+    cmdoptions.pre,
+    cmdoptions.trusted_host,
+    cmdoptions.require_hashes,
+]  # type: List[Callable[..., optparse.Option]]
+
+# options to be passed to requirements
+SUPPORTED_OPTIONS_REQ = [
+    cmdoptions.install_options,
+    cmdoptions.global_options,
+    cmdoptions.hash,
+]  # type: List[Callable[..., optparse.Option]]
+
+# the 'dest' string values
+SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ]
+
+
+def parse_requirements(
+    filename,  # type: str
+    finder=None,  # type: Optional[PackageFinder]
+    comes_from=None,  # type: Optional[str]
+    options=None,  # type: Optional[optparse.Values]
+    session=None,  # type: Optional[PipSession]
+    constraint=False,  # type: bool
+    wheel_cache=None,  # type: Optional[WheelCache]
+    use_pep517=None  # type: Optional[bool]
+):
+    # type: (...) -> Iterator[InstallRequirement]
+    """Parse a requirements file and yield InstallRequirement instances.
+
+    :param filename:    Path or url of requirements file.
+    :param finder:      Instance of pip.index.PackageFinder.
+    :param comes_from:  Origin description of requirements.
+    :param options:     cli options.
+    :param session:     Instance of pip.download.PipSession.
+    :param constraint:  If true, parsing a constraint file rather than
+        requirements file.
+    :param wheel_cache: Instance of pip.wheel.WheelCache
+    :param use_pep517:  Value of the --use-pep517 option.
+    """
+    if session is None:
+        raise TypeError(
+            "parse_requirements() missing 1 required keyword argument: "
+            "'session'"
+        )
+
+    _, content = get_file_content(
+        filename, comes_from=comes_from, session=session
+    )
+
+    lines_enum = preprocess(content, options)
+
+    for line_number, line in lines_enum:
+        req_iter = process_line(line, filename, line_number, finder,
+                                comes_from, options, session, wheel_cache,
+                                use_pep517=use_pep517, constraint=constraint)
+        for req in req_iter:
+            yield req
+
+
+def preprocess(content, options):
+    # type: (Text, Optional[optparse.Values]) -> ReqFileLines
+    """Split, filter, and join lines, and return a line iterator
+
+    :param content: the content of the requirements file
+    :param options: cli options
+    """
+    lines_enum = enumerate(content.splitlines(), start=1)  # type: ReqFileLines
+    lines_enum = join_lines(lines_enum)
+    lines_enum = ignore_comments(lines_enum)
+    lines_enum = skip_regex(lines_enum, options)
+    lines_enum = expand_env_variables(lines_enum)
+    return lines_enum
+
+
+def process_line(
+    line,  # type: Text
+    filename,  # type: str
+    line_number,  # type: int
+    finder=None,  # type: Optional[PackageFinder]
+    comes_from=None,  # type: Optional[str]
+    options=None,  # type: Optional[optparse.Values]
+    session=None,  # type: Optional[PipSession]
+    wheel_cache=None,  # type: Optional[WheelCache]
+    use_pep517=None,  # type: Optional[bool]
+    constraint=False,  # type: bool
+):
+    # type: (...) -> Iterator[InstallRequirement]
+    """Process a single requirements line; This can result in creating/yielding
+    requirements, or updating the finder.
+
+    For lines that contain requirements, the only options that have an effect
+    are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
+    requirement. Other options from SUPPORTED_OPTIONS may be present, but are
+    ignored.
+
+    For lines that do not contain requirements, the only options that have an
+    effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
+    be present, but are ignored. These lines may contain multiple options
+    (although our docs imply only one is supported), and all our parsed and
+    affect the finder.
+
+    :param constraint: If True, parsing a constraints file.
+    :param options: OptionParser options that we may update
+    """
+    parser = build_parser(line)
+    defaults = parser.get_default_values()
+    defaults.index_url = None
+    if finder:
+        defaults.format_control = finder.format_control
+    args_str, options_str = break_args_options(line)
+    # Prior to 2.7.3, shlex cannot deal with unicode entries
+    if sys.version_info < (2, 7, 3):
+        # https://github.com/python/mypy/issues/1174
+        options_str = options_str.encode('utf8')  # type: ignore
+    # https://github.com/python/mypy/issues/1174
+    opts, _ = parser.parse_args(
+        shlex.split(options_str), defaults)  # type: ignore
+
+    # preserve for the nested code path
+    line_comes_from = '%s %s (line %s)' % (
+        '-c' if constraint else '-r', filename, line_number,
+    )
+
+    # yield a line requirement
+    if args_str:
+        isolated = options.isolated_mode if options else False
+        if options:
+            cmdoptions.check_install_build_global(options, opts)
+        # get the options that apply to requirements
+        req_options = {}
+        for dest in SUPPORTED_OPTIONS_REQ_DEST:
+            if dest in opts.__dict__ and opts.__dict__[dest]:
+                req_options[dest] = opts.__dict__[dest]
+        line_source = 'line {} of {}'.format(line_number, filename)
+        yield install_req_from_line(
+            args_str,
+            comes_from=line_comes_from,
+            use_pep517=use_pep517,
+            isolated=isolated,
+            options=req_options,
+            wheel_cache=wheel_cache,
+            constraint=constraint,
+            line_source=line_source,
+        )
+
+    # yield an editable requirement
+    elif opts.editables:
+        isolated = options.isolated_mode if options else False
+        yield install_req_from_editable(
+            opts.editables[0], comes_from=line_comes_from,
+            use_pep517=use_pep517,
+            constraint=constraint, isolated=isolated, wheel_cache=wheel_cache
+        )
+
+    # parse a nested requirements file
+    elif opts.requirements or opts.constraints:
+        if opts.requirements:
+            req_path = opts.requirements[0]
+            nested_constraint = False
+        else:
+            req_path = opts.constraints[0]
+            nested_constraint = True
+        # original file is over http
+        if SCHEME_RE.search(filename):
+            # do a url join so relative paths work
+            req_path = urllib_parse.urljoin(filename, req_path)
+        # original file and nested file are paths
+        elif not SCHEME_RE.search(req_path):
+            # do a join so relative paths work
+            req_path = os.path.join(os.path.dirname(filename), req_path)
+        # TODO: Why not use `comes_from='-r {} (line {})'` here as well?
+        parsed_reqs = parse_requirements(
+            req_path, finder, comes_from, options, session,
+            constraint=nested_constraint, wheel_cache=wheel_cache
+        )
+        for req in parsed_reqs:
+            yield req
+
+    # percolate hash-checking option upward
+    elif opts.require_hashes:
+        options.require_hashes = opts.require_hashes
+
+    # set finder options
+    elif finder:
+        find_links = finder.find_links
+        index_urls = finder.index_urls
+        if opts.index_url:
+            index_urls = [opts.index_url]
+        if opts.no_index is True:
+            index_urls = []
+        if opts.extra_index_urls:
+            index_urls.extend(opts.extra_index_urls)
+        if opts.find_links:
+            # FIXME: it would be nice to keep track of the source
+            # of the find_links: support a find-links local path
+            # relative to a requirements file.
+            value = opts.find_links[0]
+            req_dir = os.path.dirname(os.path.abspath(filename))
+            relative_to_reqs_file = os.path.join(req_dir, value)
+            if os.path.exists(relative_to_reqs_file):
+                value = relative_to_reqs_file
+            find_links.append(value)
+
+        search_scope = SearchScope(
+            find_links=find_links,
+            index_urls=index_urls,
+        )
+        finder.search_scope = search_scope
+
+        if opts.pre:
+            finder.set_allow_all_prereleases()
+        for host in opts.trusted_hosts or []:
+            source = 'line {} of {}'.format(line_number, filename)
+            finder.add_trusted_host(host, source=source)
+
+
+def break_args_options(line):
+    # type: (Text) -> Tuple[str, Text]
+    """Break up the line into an args and options string.  We only want to shlex
+    (and then optparse) the options, not the args.  args can contain markers
+    which are corrupted by shlex.
+    """
+    tokens = line.split(' ')
+    args = []
+    options = tokens[:]
+    for token in tokens:
+        if token.startswith('-') or token.startswith('--'):
+            break
+        else:
+            args.append(token)
+            options.pop(0)
+    return ' '.join(args), ' '.join(options)  # type: ignore
+
+
+def build_parser(line):
+    # type: (Text) -> optparse.OptionParser
+    """
+    Return a parser for parsing requirement lines
+    """
+    parser = optparse.OptionParser(add_help_option=False)
+
+    option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ
+    for option_factory in option_factories:
+        option = option_factory()
+        parser.add_option(option)
+
+    # By default optparse sys.exits on parsing errors. We want to wrap
+    # that in our own exception.
+    def parser_exit(self, msg):
+        # type: (Any, str) -> NoReturn
+        # add offending line
+        msg = 'Invalid requirement: %s\n%s' % (line, msg)
+        raise RequirementsFileParseError(msg)
+    # NOTE: mypy disallows assigning to a method
+    #       https://github.com/python/mypy/issues/2427
+    parser.exit = parser_exit  # type: ignore
+
+    return parser
+
+
+def join_lines(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """Joins a line ending in '\' with the previous line (except when following
+    comments).  The joined line takes on the index of the first line.
+    """
+    primary_line_number = None
+    new_line = []  # type: List[Text]
+    for line_number, line in lines_enum:
+        if not line.endswith('\\') or COMMENT_RE.match(line):
+            if COMMENT_RE.match(line):
+                # this ensures comments are always matched later
+                line = ' ' + line
+            if new_line:
+                new_line.append(line)
+                yield primary_line_number, ''.join(new_line)
+                new_line = []
+            else:
+                yield line_number, line
+        else:
+            if not new_line:
+                primary_line_number = line_number
+            new_line.append(line.strip('\\'))
+
+    # last line contains \
+    if new_line:
+        yield primary_line_number, ''.join(new_line)
+
+    # TODO: handle space after '\'.
+
+
+def ignore_comments(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """
+    Strips comments and filter empty lines.
+    """
+    for line_number, line in lines_enum:
+        line = COMMENT_RE.sub('', line)
+        line = line.strip()
+        if line:
+            yield line_number, line
+
+
+def skip_regex(lines_enum, options):
+    # type: (ReqFileLines, Optional[optparse.Values]) -> ReqFileLines
+    """
+    Skip lines that match '--skip-requirements-regex' pattern
+
+    Note: the regex pattern is only built once
+    """
+    skip_regex = options.skip_requirements_regex if options else None
+    if skip_regex:
+        pattern = re.compile(skip_regex)
+        lines_enum = filterfalse(lambda e: pattern.search(e[1]), lines_enum)
+    return lines_enum
+
+
+def expand_env_variables(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """Replace all environment variables that can be retrieved via `os.getenv`.
+
+    The only allowed format for environment variables defined in the
+    requirement file is `${MY_VARIABLE_1}` to ensure two things:
+
+    1. Strings that contain a `$` aren't accidentally (partially) expanded.
+    2. Ensure consistency across platforms for requirement files.
+
+    These points are the result of a discussion on the `github pull
+    request #3514 <https://github.com/pypa/pip/pull/3514>`_.
+
+    Valid characters in variable names follow the `POSIX standard
+    <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited
+    to uppercase letter, digits and the `_` (underscore).
+    """
+    for line_number, line in lines_enum:
+        for env_var, var_name in ENV_VAR_RE.findall(line):
+            value = os.getenv(var_name)
+            if not value:
+                continue
+
+            line = line.replace(env_var, value)
+
+        yield line_number, line
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_install.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_install.py
new file mode 100644
index 00000000..f5c93504
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_install.py
@@ -0,0 +1,1035 @@
+from __future__ import absolute_import
+
+import logging
+import os
+import shutil
+import sys
+import sysconfig
+import zipfile
+from distutils.util import change_root
+
+from pip._vendor import pkg_resources, six
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import Version
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal import wheel
+from pip._internal.build_env import NoOpBuildEnvironment
+from pip._internal.exceptions import InstallationError
+from pip._internal.models.link import Link
+from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
+from pip._internal.req.req_uninstall import UninstallPathSet
+from pip._internal.utils.compat import native_str
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.marker_files import PIP_DELETE_MARKER_FILENAME
+from pip._internal.utils.misc import (
+    _make_build_dir, ask_path_exists, backup_dir, call_subprocess,
+    display_path, dist_in_site_packages, dist_in_usersite, ensure_dir,
+    get_installed_version, redact_password_from_url, rmtree,
+)
+from pip._internal.utils.packaging import get_metadata
+from pip._internal.utils.setuptools_build import make_setuptools_shim_args
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.ui import open_spinner
+from pip._internal.utils.virtualenv import running_under_virtualenv
+from pip._internal.vcs import vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, List, Mapping, Optional, Sequence, Union,
+    )
+    from pip._internal.build_env import BuildEnvironment
+    from pip._internal.cache import WheelCache
+    from pip._internal.index import PackageFinder
+    from pip._vendor.pkg_resources import Distribution
+    from pip._vendor.packaging.specifiers import SpecifierSet
+    from pip._vendor.packaging.markers import Marker
+
+
+logger = logging.getLogger(__name__)
+
+
+class InstallRequirement(object):
+    """
+    Represents something that may be installed later on, may have information
+    about where to fetch the relevant requirement and also contains logic for
+    installing the said requirement.
+    """
+
+    def __init__(
+        self,
+        req,  # type: Optional[Requirement]
+        comes_from,  # type: Optional[Union[str, InstallRequirement]]
+        source_dir=None,  # type: Optional[str]
+        editable=False,  # type: bool
+        link=None,  # type: Optional[Link]
+        update=True,  # type: bool
+        markers=None,  # type: Optional[Marker]
+        use_pep517=None,  # type: Optional[bool]
+        isolated=False,  # type: bool
+        options=None,  # type: Optional[Dict[str, Any]]
+        wheel_cache=None,  # type: Optional[WheelCache]
+        constraint=False,  # type: bool
+        extras=()  # type: Iterable[str]
+    ):
+        # type: (...) -> None
+        assert req is None or isinstance(req, Requirement), req
+        self.req = req
+        self.comes_from = comes_from
+        self.constraint = constraint
+        if source_dir is None:
+            self.source_dir = None  # type: Optional[str]
+        else:
+            self.source_dir = os.path.normpath(os.path.abspath(source_dir))
+        self.editable = editable
+
+        self._wheel_cache = wheel_cache
+        if link is None and req and req.url:
+            # PEP 508 URL requirement
+            link = Link(req.url)
+        self.link = self.original_link = link
+
+        if extras:
+            self.extras = extras
+        elif req:
+            self.extras = {
+                pkg_resources.safe_extra(extra) for extra in req.extras
+            }
+        else:
+            self.extras = set()
+        if markers is None and req:
+            markers = req.marker
+        self.markers = markers
+
+        self._egg_info_path = None  # type: Optional[str]
+        # This holds the pkg_resources.Distribution object if this requirement
+        # is already available:
+        self.satisfied_by = None
+        # This hold the pkg_resources.Distribution object if this requirement
+        # conflicts with another installed distribution:
+        self.conflicts_with = None
+        # Temporary build location
+        self._temp_build_dir = TempDirectory(kind="req-build")
+        # Used to store the global directory where the _temp_build_dir should
+        # have been created. Cf _correct_build_location method.
+        self._ideal_build_dir = None  # type: Optional[str]
+        # True if the editable should be updated:
+        self.update = update
+        # Set to True after successful installation
+        self.install_succeeded = None  # type: Optional[bool]
+        # UninstallPathSet of uninstalled distribution (for possible rollback)
+        self.uninstalled_pathset = None
+        self.options = options if options else {}
+        # Set to True after successful preparation of this requirement
+        self.prepared = False
+        self.is_direct = False
+
+        self.isolated = isolated
+        self.build_env = NoOpBuildEnvironment()  # type: BuildEnvironment
+
+        # For PEP 517, the directory where we request the project metadata
+        # gets stored. We need this to pass to build_wheel, so the backend
+        # can ensure that the wheel matches the metadata (see the PEP for
+        # details).
+        self.metadata_directory = None  # type: Optional[str]
+
+        # The static build requirements (from pyproject.toml)
+        self.pyproject_requires = None  # type: Optional[List[str]]
+
+        # Build requirements that we will check are available
+        self.requirements_to_check = []  # type: List[str]
+
+        # The PEP 517 backend we should use to build the project
+        self.pep517_backend = None  # type: Optional[Pep517HookCaller]
+
+        # Are we using PEP 517 for this requirement?
+        # After pyproject.toml has been loaded, the only valid values are True
+        # and False. Before loading, None is valid (meaning "use the default").
+        # Setting an explicit value before loading pyproject.toml is supported,
+        # but after loading this flag should be treated as read only.
+        self.use_pep517 = use_pep517
+
+    def __str__(self):
+        # type: () -> str
+        if self.req:
+            s = str(self.req)
+            if self.link:
+                s += ' from %s' % redact_password_from_url(self.link.url)
+        elif self.link:
+            s = redact_password_from_url(self.link.url)
+        else:
+            s = '<InstallRequirement>'
+        if self.satisfied_by is not None:
+            s += ' in %s' % display_path(self.satisfied_by.location)
+        if self.comes_from:
+            if isinstance(self.comes_from, six.string_types):
+                comes_from = self.comes_from  # type: Optional[str]
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += ' (from %s)' % comes_from
+        return s
+
+    def __repr__(self):
+        # type: () -> str
+        return '<%s object: %s editable=%r>' % (
+            self.__class__.__name__, str(self), self.editable)
+
+    def format_debug(self):
+        # type: () -> str
+        """An un-tested helper for getting state, for debugging.
+        """
+        attributes = vars(self)
+        names = sorted(attributes)
+
+        state = (
+            "{}={!r}".format(attr, attributes[attr]) for attr in sorted(names)
+        )
+        return '<{name} object: {{{state}}}>'.format(
+            name=self.__class__.__name__,
+            state=", ".join(state),
+        )
+
+    def populate_link(self, finder, upgrade, require_hashes):
+        # type: (PackageFinder, bool, bool) -> None
+        """Ensure that if a link can be found for this, that it is found.
+
+        Note that self.link may still be None - if Upgrade is False and the
+        requirement is already installed.
+
+        If require_hashes is True, don't use the wheel cache, because cached
+        wheels, always built locally, have different hashes than the files
+        downloaded from the index server and thus throw false hash mismatches.
+        Furthermore, cached wheels at present have undeterministic contents due
+        to file modification times.
+        """
+        if self.link is None:
+            self.link = finder.find_requirement(self, upgrade)
+        if self._wheel_cache is not None and not require_hashes:
+            old_link = self.link
+            self.link = self._wheel_cache.get(self.link, self.name)
+            if old_link != self.link:
+                logger.debug('Using cached wheel link: %s', self.link)
+
+    # Things that are valid for all kinds of requirements?
+    @property
+    def name(self):
+        # type: () -> Optional[str]
+        if self.req is None:
+            return None
+        return native_str(pkg_resources.safe_name(self.req.name))
+
+    @property
+    def specifier(self):
+        # type: () -> SpecifierSet
+        return self.req.specifier
+
+    @property
+    def is_pinned(self):
+        # type: () -> bool
+        """Return whether I am pinned to an exact version.
+
+        For example, some-package==1.2 is pinned; some-package>1.2 is not.
+        """
+        specifiers = self.specifier
+        return (len(specifiers) == 1 and
+                next(iter(specifiers)).operator in {'==', '==='})
+
+    @property
+    def installed_version(self):
+        # type: () -> Optional[str]
+        return get_installed_version(self.name)
+
+    def match_markers(self, extras_requested=None):
+        # type: (Optional[Iterable[str]]) -> bool
+        if not extras_requested:
+            # Provide an extra to safely evaluate the markers
+            # without matching any extra
+            extras_requested = ('',)
+        if self.markers is not None:
+            return any(
+                self.markers.evaluate({'extra': extra})
+                for extra in extras_requested)
+        else:
+            return True
+
+    @property
+    def has_hash_options(self):
+        # type: () -> bool
+        """Return whether any known-good hashes are specified as options.
+
+        These activate --require-hashes mode; hashes specified as part of a
+        URL do not.
+
+        """
+        return bool(self.options.get('hashes', {}))
+
+    def hashes(self, trust_internet=True):
+        # type: (bool) -> Hashes
+        """Return a hash-comparer that considers my option- and URL-based
+        hashes to be known-good.
+
+        Hashes in URLs--ones embedded in the requirements file, not ones
+        downloaded from an index server--are almost peers with ones from
+        flags. They satisfy --require-hashes (whether it was implicitly or
+        explicitly activated) but do not activate it. md5 and sha224 are not
+        allowed in flags, which should nudge people toward good algos. We
+        always OR all hashes together, even ones from URLs.
+
+        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
+            downloaded from the internet, as by populate_link()
+
+        """
+        good_hashes = self.options.get('hashes', {}).copy()
+        link = self.link if trust_internet else self.original_link
+        if link and link.hash:
+            good_hashes.setdefault(link.hash_name, []).append(link.hash)
+        return Hashes(good_hashes)
+
+    def from_path(self):
+        # type: () -> Optional[str]
+        """Format a nice indicator to show where this "comes from"
+        """
+        if self.req is None:
+            return None
+        s = str(self.req)
+        if self.comes_from:
+            if isinstance(self.comes_from, six.string_types):
+                comes_from = self.comes_from
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += '->' + comes_from
+        return s
+
+    def build_location(self, build_dir):
+        # type: (str) -> str
+        assert build_dir is not None
+        if self._temp_build_dir.path is not None:
+            return self._temp_build_dir.path
+        if self.req is None:
+            # for requirement via a path to a directory: the name of the
+            # package is not available yet so we create a temp directory
+            # Once run_egg_info will have run, we'll be able
+            # to fix it via _correct_build_location
+            # Some systems have /tmp as a symlink which confuses custom
+            # builds (such as numpy). Thus, we ensure that the real path
+            # is returned.
+            self._temp_build_dir.create()
+            self._ideal_build_dir = build_dir
+
+            return self._temp_build_dir.path
+        if self.editable:
+            name = self.name.lower()
+        else:
+            name = self.name
+        # FIXME: Is there a better place to create the build_dir? (hg and bzr
+        # need this)
+        if not os.path.exists(build_dir):
+            logger.debug('Creating directory %s', build_dir)
+            _make_build_dir(build_dir)
+        return os.path.join(build_dir, name)
+
+    def _correct_build_location(self):
+        # type: () -> None
+        """Move self._temp_build_dir to self._ideal_build_dir/self.req.name
+
+        For some requirements (e.g. a path to a directory), the name of the
+        package is not available until we run egg_info, so the build_location
+        will return a temporary directory and store the _ideal_build_dir.
+
+        This is only called by self.run_egg_info to fix the temporary build
+        directory.
+        """
+        if self.source_dir is not None:
+            return
+        assert self.req is not None
+        assert self._temp_build_dir.path
+        assert (self._ideal_build_dir is not None and
+                self._ideal_build_dir.path)  # type: ignore
+        old_location = self._temp_build_dir.path
+        self._temp_build_dir.path = None
+
+        new_location = self.build_location(self._ideal_build_dir)
+        if os.path.exists(new_location):
+            raise InstallationError(
+                'A package already exists in %s; please remove it to continue'
+                % display_path(new_location))
+        logger.debug(
+            'Moving package %s from %s to new location %s',
+            self, display_path(old_location), display_path(new_location),
+        )
+        shutil.move(old_location, new_location)
+        self._temp_build_dir.path = new_location
+        self._ideal_build_dir = None
+        self.source_dir = os.path.normpath(os.path.abspath(new_location))
+        self._egg_info_path = None
+
+        # Correct the metadata directory, if it exists
+        if self.metadata_directory:
+            old_meta = self.metadata_directory
+            rel = os.path.relpath(old_meta, start=old_location)
+            new_meta = os.path.join(new_location, rel)
+            new_meta = os.path.normpath(os.path.abspath(new_meta))
+            self.metadata_directory = new_meta
+
+    def remove_temporary_source(self):
+        # type: () -> None
+        """Remove the source files from this requirement, if they are marked
+        for deletion"""
+        if self.source_dir and os.path.exists(
+                os.path.join(self.source_dir, PIP_DELETE_MARKER_FILENAME)):
+            logger.debug('Removing source in %s', self.source_dir)
+            rmtree(self.source_dir)
+        self.source_dir = None
+        self._temp_build_dir.cleanup()
+        self.build_env.cleanup()
+
+    def check_if_exists(self, use_user_site):
+        # type: (bool) -> bool
+        """Find an installed distribution that satisfies or conflicts
+        with this requirement, and set self.satisfied_by or
+        self.conflicts_with appropriately.
+        """
+        if self.req is None:
+            return False
+        try:
+            # get_distribution() will resolve the entire list of requirements
+            # anyway, and we've already determined that we need the requirement
+            # in question, so strip the marker so that we don't try to
+            # evaluate it.
+            no_marker = Requirement(str(self.req))
+            no_marker.marker = None
+            self.satisfied_by = pkg_resources.get_distribution(str(no_marker))
+            if self.editable and self.satisfied_by:
+                self.conflicts_with = self.satisfied_by
+                # when installing editables, nothing pre-existing should ever
+                # satisfy
+                self.satisfied_by = None
+                return True
+        except pkg_resources.DistributionNotFound:
+            return False
+        except pkg_resources.VersionConflict:
+            existing_dist = pkg_resources.get_distribution(
+                self.req.name
+            )
+            if use_user_site:
+                if dist_in_usersite(existing_dist):
+                    self.conflicts_with = existing_dist
+                elif (running_under_virtualenv() and
+                        dist_in_site_packages(existing_dist)):
+                    raise InstallationError(
+                        "Will not install to the user site because it will "
+                        "lack sys.path precedence to %s in %s" %
+                        (existing_dist.project_name, existing_dist.location)
+                    )
+            else:
+                self.conflicts_with = existing_dist
+        return True
+
+    # Things valid for wheels
+    @property
+    def is_wheel(self):
+        # type: () -> bool
+        if not self.link:
+            return False
+        return self.link.is_wheel
+
+    def move_wheel_files(
+        self,
+        wheeldir,  # type: str
+        root=None,  # type: Optional[str]
+        home=None,  # type: Optional[str]
+        prefix=None,  # type: Optional[str]
+        warn_script_location=True,  # type: bool
+        use_user_site=False,  # type: bool
+        pycompile=True  # type: bool
+    ):
+        # type: (...) -> None
+        wheel.move_wheel_files(
+            self.name, self.req, wheeldir,
+            user=use_user_site,
+            home=home,
+            root=root,
+            prefix=prefix,
+            pycompile=pycompile,
+            isolated=self.isolated,
+            warn_script_location=warn_script_location,
+        )
+
+    # Things valid for sdists
+    @property
+    def setup_py_dir(self):
+        # type: () -> str
+        return os.path.join(
+            self.source_dir,
+            self.link and self.link.subdirectory_fragment or '')
+
+    @property
+    def setup_py_path(self):
+        # type: () -> str
+        assert self.source_dir, "No source dir for %s" % self
+
+        setup_py = os.path.join(self.setup_py_dir, 'setup.py')
+
+        # Python2 __file__ should not be unicode
+        if six.PY2 and isinstance(setup_py, six.text_type):
+            setup_py = setup_py.encode(sys.getfilesystemencoding())
+
+        return setup_py
+
+    @property
+    def pyproject_toml_path(self):
+        # type: () -> str
+        assert self.source_dir, "No source dir for %s" % self
+
+        return make_pyproject_path(self.setup_py_dir)
+
+    def load_pyproject_toml(self):
+        # type: () -> None
+        """Load the pyproject.toml file.
+
+        After calling this routine, all of the attributes related to PEP 517
+        processing for this requirement have been set. In particular, the
+        use_pep517 attribute can be used to determine whether we should
+        follow the PEP 517 or legacy (setup.py) code path.
+        """
+        pyproject_toml_data = load_pyproject_toml(
+            self.use_pep517,
+            self.pyproject_toml_path,
+            self.setup_py_path,
+            str(self)
+        )
+
+        self.use_pep517 = (pyproject_toml_data is not None)
+
+        if not self.use_pep517:
+            return
+
+        requires, backend, check = pyproject_toml_data
+        self.requirements_to_check = check
+        self.pyproject_requires = requires
+        self.pep517_backend = Pep517HookCaller(self.setup_py_dir, backend)
+
+        # Use a custom function to call subprocesses
+        self.spin_message = ""
+
+        def runner(
+            cmd,  # type: List[str]
+            cwd=None,  # type: Optional[str]
+            extra_environ=None  # type: Optional[Mapping[str, Any]]
+        ):
+            # type: (...) -> None
+            with open_spinner(self.spin_message) as spinner:
+                call_subprocess(
+                    cmd,
+                    cwd=cwd,
+                    extra_environ=extra_environ,
+                    spinner=spinner
+                )
+            self.spin_message = ""
+
+        self.pep517_backend._subprocess_runner = runner
+
+    def prepare_metadata(self):
+        # type: () -> None
+        """Ensure that project metadata is available.
+
+        Under PEP 517, call the backend hook to prepare the metadata.
+        Under legacy processing, call setup.py egg-info.
+        """
+        assert self.source_dir
+
+        with indent_log():
+            if self.use_pep517:
+                self.prepare_pep517_metadata()
+            else:
+                self.run_egg_info()
+
+        if not self.req:
+            if isinstance(parse_version(self.metadata["Version"]), Version):
+                op = "=="
+            else:
+                op = "==="
+            self.req = Requirement(
+                "".join([
+                    self.metadata["Name"],
+                    op,
+                    self.metadata["Version"],
+                ])
+            )
+            self._correct_build_location()
+        else:
+            metadata_name = canonicalize_name(self.metadata["Name"])
+            if canonicalize_name(self.req.name) != metadata_name:
+                logger.warning(
+                    'Generating metadata for package %s '
+                    'produced metadata for project name %s. Fix your '
+                    '#egg=%s fragments.',
+                    self.name, metadata_name, self.name
+                )
+                self.req = Requirement(metadata_name)
+
+    def prepare_pep517_metadata(self):
+        # type: () -> None
+        assert self.pep517_backend is not None
+
+        metadata_dir = os.path.join(
+            self.setup_py_dir,
+            'pip-wheel-metadata'
+        )
+        ensure_dir(metadata_dir)
+
+        with self.build_env:
+            # Note that Pep517HookCaller implements a fallback for
+            # prepare_metadata_for_build_wheel, so we don't have to
+            # consider the possibility that this hook doesn't exist.
+            backend = self.pep517_backend
+            self.spin_message = "Preparing wheel metadata"
+            distinfo_dir = backend.prepare_metadata_for_build_wheel(
+                metadata_dir
+            )
+
+        self.metadata_directory = os.path.join(metadata_dir, distinfo_dir)
+
+    def run_egg_info(self):
+        # type: () -> None
+        if self.name:
+            logger.debug(
+                'Running setup.py (path:%s) egg_info for package %s',
+                self.setup_py_path, self.name,
+            )
+        else:
+            logger.debug(
+                'Running setup.py (path:%s) egg_info for package from %s',
+                self.setup_py_path, self.link,
+            )
+        base_cmd = make_setuptools_shim_args(self.setup_py_path)
+        if self.isolated:
+            base_cmd += ["--no-user-cfg"]
+        egg_info_cmd = base_cmd + ['egg_info']
+        # We can't put the .egg-info files at the root, because then the
+        # source code will be mistaken for an installed egg, causing
+        # problems
+        if self.editable:
+            egg_base_option = []  # type: List[str]
+        else:
+            egg_info_dir = os.path.join(self.setup_py_dir, 'pip-egg-info')
+            ensure_dir(egg_info_dir)
+            egg_base_option = ['--egg-base', 'pip-egg-info']
+        with self.build_env:
+            call_subprocess(
+                egg_info_cmd + egg_base_option,
+                cwd=self.setup_py_dir,
+                command_desc='python setup.py egg_info')
+
+    @property
+    def egg_info_path(self):
+        # type: () -> str
+        if self._egg_info_path is None:
+            if self.editable:
+                base = self.source_dir
+            else:
+                base = os.path.join(self.setup_py_dir, 'pip-egg-info')
+            filenames = os.listdir(base)
+            if self.editable:
+                filenames = []
+                for root, dirs, files in os.walk(base):
+                    for dir in vcs.dirnames:
+                        if dir in dirs:
+                            dirs.remove(dir)
+                    # Iterate over a copy of ``dirs``, since mutating
+                    # a list while iterating over it can cause trouble.
+                    # (See https://github.com/pypa/pip/pull/462.)
+                    for dir in list(dirs):
+                        # Don't search in anything that looks like a virtualenv
+                        # environment
+                        if (
+                                os.path.lexists(
+                                    os.path.join(root, dir, 'bin', 'python')
+                                ) or
+                                os.path.exists(
+                                    os.path.join(
+                                        root, dir, 'Scripts', 'Python.exe'
+                                    )
+                                )):
+                            dirs.remove(dir)
+                        # Also don't search through tests
+                        elif dir == 'test' or dir == 'tests':
+                            dirs.remove(dir)
+                    filenames.extend([os.path.join(root, dir)
+                                      for dir in dirs])
+                filenames = [f for f in filenames if f.endswith('.egg-info')]
+
+            if not filenames:
+                raise InstallationError(
+                    "Files/directories not found in %s" % base
+                )
+            # if we have more than one match, we pick the toplevel one.  This
+            # can easily be the case if there is a dist folder which contains
+            # an extracted tarball for testing purposes.
+            if len(filenames) > 1:
+                filenames.sort(
+                    key=lambda x: x.count(os.path.sep) +
+                    (os.path.altsep and x.count(os.path.altsep) or 0)
+                )
+            self._egg_info_path = os.path.join(base, filenames[0])
+        return self._egg_info_path
+
+    @property
+    def metadata(self):
+        # type: () -> Any
+        if not hasattr(self, '_metadata'):
+            self._metadata = get_metadata(self.get_dist())
+
+        return self._metadata
+
+    def get_dist(self):
+        # type: () -> Distribution
+        """Return a pkg_resources.Distribution for this requirement"""
+        if self.metadata_directory:
+            dist_dir = self.metadata_directory
+            dist_cls = pkg_resources.DistInfoDistribution
+        else:
+            dist_dir = self.egg_info_path.rstrip(os.path.sep)
+            # https://github.com/python/mypy/issues/1174
+            dist_cls = pkg_resources.Distribution  # type: ignore
+
+        # dist_dir_name can be of the form "<project>.dist-info" or
+        # e.g. "<project>.egg-info".
+        base_dir, dist_dir_name = os.path.split(dist_dir)
+        dist_name = os.path.splitext(dist_dir_name)[0]
+        metadata = pkg_resources.PathMetadata(base_dir, dist_dir)
+
+        return dist_cls(
+            base_dir,
+            project_name=dist_name,
+            metadata=metadata,
+        )
+
+    def assert_source_matches_version(self):
+        # type: () -> None
+        assert self.source_dir
+        version = self.metadata['version']
+        if self.req.specifier and version not in self.req.specifier:
+            logger.warning(
+                'Requested %s, but installing version %s',
+                self,
+                version,
+            )
+        else:
+            logger.debug(
+                'Source in %s has version %s, which satisfies requirement %s',
+                display_path(self.source_dir),
+                version,
+                self,
+            )
+
+    # For both source distributions and editables
+    def ensure_has_source_dir(self, parent_dir):
+        # type: (str) -> str
+        """Ensure that a source_dir is set.
+
+        This will create a temporary build dir if the name of the requirement
+        isn't known yet.
+
+        :param parent_dir: The ideal pip parent_dir for the source_dir.
+            Generally src_dir for editables and build_dir for sdists.
+        :return: self.source_dir
+        """
+        if self.source_dir is None:
+            self.source_dir = self.build_location(parent_dir)
+        return self.source_dir
+
+    # For editable installations
+    def install_editable(
+        self,
+        install_options,  # type: List[str]
+        global_options=(),  # type: Sequence[str]
+        prefix=None  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        logger.info('Running setup.py develop for %s', self.name)
+
+        if self.isolated:
+            global_options = list(global_options) + ["--no-user-cfg"]
+
+        if prefix:
+            prefix_param = ['--prefix={}'.format(prefix)]
+            install_options = list(install_options) + prefix_param
+
+        with indent_log():
+            # FIXME: should we do --install-headers here too?
+            with self.build_env:
+                call_subprocess(
+                    make_setuptools_shim_args(self.setup_py_path) +
+                    list(global_options) +
+                    ['develop', '--no-deps'] +
+                    list(install_options),
+
+                    cwd=self.setup_py_dir,
+                )
+
+        self.install_succeeded = True
+
+    def update_editable(self, obtain=True):
+        # type: (bool) -> None
+        if not self.link:
+            logger.debug(
+                "Cannot update repository at %s; repository location is "
+                "unknown",
+                self.source_dir,
+            )
+            return
+        assert self.editable
+        assert self.source_dir
+        if self.link.scheme == 'file':
+            # Static paths don't get updated
+            return
+        assert '+' in self.link.url, "bad url: %r" % self.link.url
+        if not self.update:
+            return
+        vc_type, url = self.link.url.split('+', 1)
+        vcs_backend = vcs.get_backend(vc_type)
+        if vcs_backend:
+            url = self.link.url
+            if obtain:
+                vcs_backend.obtain(self.source_dir, url=url)
+            else:
+                vcs_backend.export(self.source_dir, url=url)
+        else:
+            assert 0, (
+                'Unexpected version control type (in %s): %s'
+                % (self.link, vc_type))
+
+    # Top-level Actions
+    def uninstall(self, auto_confirm=False, verbose=False,
+                  use_user_site=False):
+        # type: (bool, bool, bool) -> Optional[UninstallPathSet]
+        """
+        Uninstall the distribution currently satisfying this requirement.
+
+        Prompts before removing or modifying files unless
+        ``auto_confirm`` is True.
+
+        Refuses to delete or modify files outside of ``sys.prefix`` -
+        thus uninstallation within a virtual environment can only
+        modify that virtual environment, even if the virtualenv is
+        linked to global site-packages.
+
+        """
+        if not self.check_if_exists(use_user_site):
+            logger.warning("Skipping %s as it is not installed.", self.name)
+            return None
+        dist = self.satisfied_by or self.conflicts_with
+
+        uninstalled_pathset = UninstallPathSet.from_dist(dist)
+        uninstalled_pathset.remove(auto_confirm, verbose)
+        return uninstalled_pathset
+
+    def _clean_zip_name(self, name, prefix):  # only used by archive.
+        # type: (str, str) -> str
+        assert name.startswith(prefix + os.path.sep), (
+            "name %r doesn't start with prefix %r" % (name, prefix)
+        )
+        name = name[len(prefix) + 1:]
+        name = name.replace(os.path.sep, '/')
+        return name
+
+    def _get_archive_name(self, path, parentdir, rootdir):
+        # type: (str, str, str) -> str
+        path = os.path.join(parentdir, path)
+        name = self._clean_zip_name(path, rootdir)
+        return self.name + '/' + name
+
+    # TODO: Investigate if this should be kept in InstallRequirement
+    #       Seems to be used only when VCS + downloads
+    def archive(self, build_dir):
+        # type: (str) -> None
+        assert self.source_dir
+        create_archive = True
+        archive_name = '%s-%s.zip' % (self.name, self.metadata["version"])
+        archive_path = os.path.join(build_dir, archive_name)
+        if os.path.exists(archive_path):
+            response = ask_path_exists(
+                'The file %s exists. (i)gnore, (w)ipe, (b)ackup, (a)bort ' %
+                display_path(archive_path), ('i', 'w', 'b', 'a'))
+            if response == 'i':
+                create_archive = False
+            elif response == 'w':
+                logger.warning('Deleting %s', display_path(archive_path))
+                os.remove(archive_path)
+            elif response == 'b':
+                dest_file = backup_dir(archive_path)
+                logger.warning(
+                    'Backing up %s to %s',
+                    display_path(archive_path),
+                    display_path(dest_file),
+                )
+                shutil.move(archive_path, dest_file)
+            elif response == 'a':
+                sys.exit(-1)
+        if create_archive:
+            zip = zipfile.ZipFile(
+                archive_path, 'w', zipfile.ZIP_DEFLATED,
+                allowZip64=True
+            )
+            dir = os.path.normcase(os.path.abspath(self.setup_py_dir))
+            for dirpath, dirnames, filenames in os.walk(dir):
+                if 'pip-egg-info' in dirnames:
+                    dirnames.remove('pip-egg-info')
+                for dirname in dirnames:
+                    dir_arcname = self._get_archive_name(dirname,
+                                                         parentdir=dirpath,
+                                                         rootdir=dir)
+                    zipdir = zipfile.ZipInfo(dir_arcname + '/')
+                    zipdir.external_attr = 0x1ED << 16  # 0o755
+                    zip.writestr(zipdir, '')
+                for filename in filenames:
+                    if filename == PIP_DELETE_MARKER_FILENAME:
+                        continue
+                    file_arcname = self._get_archive_name(filename,
+                                                          parentdir=dirpath,
+                                                          rootdir=dir)
+                    filename = os.path.join(dirpath, filename)
+                    zip.write(filename, file_arcname)
+            zip.close()
+            logger.info('Saved %s', display_path(archive_path))
+
+    def install(
+        self,
+        install_options,  # type: List[str]
+        global_options=None,  # type: Optional[Sequence[str]]
+        root=None,  # type: Optional[str]
+        home=None,  # type: Optional[str]
+        prefix=None,  # type: Optional[str]
+        warn_script_location=True,  # type: bool
+        use_user_site=False,  # type: bool
+        pycompile=True  # type: bool
+    ):
+        # type: (...) -> None
+        global_options = global_options if global_options is not None else []
+        if self.editable:
+            self.install_editable(
+                install_options, global_options, prefix=prefix,
+            )
+            return
+        if self.is_wheel:
+            version = wheel.wheel_version(self.source_dir)
+            wheel.check_compatibility(version, self.name)
+
+            self.move_wheel_files(
+                self.source_dir, root=root, prefix=prefix, home=home,
+                warn_script_location=warn_script_location,
+                use_user_site=use_user_site, pycompile=pycompile,
+            )
+            self.install_succeeded = True
+            return
+
+        # Extend the list of global and install options passed on to
+        # the setup.py call with the ones from the requirements file.
+        # Options specified in requirements file override those
+        # specified on the command line, since the last option given
+        # to setup.py is the one that is used.
+        global_options = list(global_options) + \
+            self.options.get('global_options', [])
+        install_options = list(install_options) + \
+            self.options.get('install_options', [])
+
+        if self.isolated:
+            # https://github.com/python/mypy/issues/1174
+            global_options = global_options + ["--no-user-cfg"]  # type: ignore
+
+        with TempDirectory(kind="record") as temp_dir:
+            record_filename = os.path.join(temp_dir.path, 'install-record.txt')
+            install_args = self.get_install_args(
+                global_options, record_filename, root, prefix, pycompile,
+            )
+            msg = 'Running setup.py install for %s' % (self.name,)
+            with open_spinner(msg) as spinner:
+                with indent_log():
+                    with self.build_env:
+                        call_subprocess(
+                            install_args + install_options,
+                            cwd=self.setup_py_dir,
+                            spinner=spinner,
+                        )
+
+            if not os.path.exists(record_filename):
+                logger.debug('Record file %s not found', record_filename)
+                return
+            self.install_succeeded = True
+
+            def prepend_root(path):
+                # type: (str) -> str
+                if root is None or not os.path.isabs(path):
+                    return path
+                else:
+                    return change_root(root, path)
+
+            with open(record_filename) as f:
+                for line in f:
+                    directory = os.path.dirname(line)
+                    if directory.endswith('.egg-info'):
+                        egg_info_dir = prepend_root(directory)
+                        break
+                else:
+                    logger.warning(
+                        'Could not find .egg-info directory in install record'
+                        ' for %s',
+                        self,
+                    )
+                    # FIXME: put the record somewhere
+                    # FIXME: should this be an error?
+                    return
+            new_lines = []
+            with open(record_filename) as f:
+                for line in f:
+                    filename = line.strip()
+                    if os.path.isdir(filename):
+                        filename += os.path.sep
+                    new_lines.append(
+                        os.path.relpath(prepend_root(filename), egg_info_dir)
+                    )
+            new_lines.sort()
+            ensure_dir(egg_info_dir)
+            inst_files_path = os.path.join(egg_info_dir, 'installed-files.txt')
+            with open(inst_files_path, 'w') as f:
+                f.write('\n'.join(new_lines) + '\n')
+
+    def get_install_args(
+        self,
+        global_options,  # type: Sequence[str]
+        record_filename,  # type: str
+        root,  # type: Optional[str]
+        prefix,  # type: Optional[str]
+        pycompile  # type: bool
+    ):
+        # type: (...) -> List[str]
+        install_args = make_setuptools_shim_args(self.setup_py_path,
+                                                 unbuffered_output=True)
+        install_args += list(global_options) + \
+            ['install', '--record', record_filename]
+        install_args += ['--single-version-externally-managed']
+
+        if root is not None:
+            install_args += ['--root', root]
+        if prefix is not None:
+            install_args += ['--prefix', prefix]
+
+        if pycompile:
+            install_args += ["--compile"]
+        else:
+            install_args += ["--no-compile"]
+
+        if running_under_virtualenv():
+            py_ver_str = 'python' + sysconfig.get_python_version()
+            install_args += ['--install-headers',
+                             os.path.join(sys.prefix, 'include', 'site',
+                                          py_ver_str, self.name)]
+
+        return install_args
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py
new file mode 100644
index 00000000..d1966a4a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_set.py
@@ -0,0 +1,193 @@
+from __future__ import absolute_import
+
+import logging
+from collections import OrderedDict
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.wheel import Wheel
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, Iterable, List, Optional, Tuple
+    from pip._internal.req.req_install import InstallRequirement
+
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementSet(object):
+
+    def __init__(self, require_hashes=False, check_supported_wheels=True):
+        # type: (bool, bool) -> None
+        """Create a RequirementSet.
+        """
+
+        self.requirements = OrderedDict()  # type: Dict[str, InstallRequirement]  # noqa: E501
+        self.require_hashes = require_hashes
+        self.check_supported_wheels = check_supported_wheels
+
+        # Mapping of alias: real_name
+        self.requirement_aliases = {}  # type: Dict[str, str]
+        self.unnamed_requirements = []  # type: List[InstallRequirement]
+        self.successfully_downloaded = []  # type: List[InstallRequirement]
+        self.reqs_to_cleanup = []  # type: List[InstallRequirement]
+
+    def __str__(self):
+        # type: () -> str
+        reqs = [req for req in self.requirements.values()
+                if not req.comes_from]
+        reqs.sort(key=lambda req: req.name.lower())
+        return ' '.join([str(req.req) for req in reqs])
+
+    def __repr__(self):
+        # type: () -> str
+        reqs = [req for req in self.requirements.values()]
+        reqs.sort(key=lambda req: req.name.lower())
+        reqs_str = ', '.join([str(req.req) for req in reqs])
+        return ('<%s object; %d requirement(s): %s>'
+                % (self.__class__.__name__, len(reqs), reqs_str))
+
+    def add_requirement(
+        self,
+        install_req,  # type: InstallRequirement
+        parent_req_name=None,  # type: Optional[str]
+        extras_requested=None  # type: Optional[Iterable[str]]
+    ):
+        # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]]  # noqa: E501
+        """Add install_req as a requirement to install.
+
+        :param parent_req_name: The name of the requirement that needed this
+            added. The name is used because when multiple unnamed requirements
+            resolve to the same name, we could otherwise end up with dependency
+            links that point outside the Requirements set. parent_req must
+            already be added. Note that None implies that this is a user
+            supplied requirement, vs an inferred one.
+        :param extras_requested: an iterable of extras used to evaluate the
+            environment markers.
+        :return: Additional requirements to scan. That is either [] if
+            the requirement is not applicable, or [install_req] if the
+            requirement is applicable and has just been added.
+        """
+        name = install_req.name
+
+        # If the markers do not match, ignore this requirement.
+        if not install_req.match_markers(extras_requested):
+            logger.info(
+                "Ignoring %s: markers '%s' don't match your environment",
+                name, install_req.markers,
+            )
+            return [], None
+
+        # If the wheel is not supported, raise an error.
+        # Should check this after filtering out based on environment markers to
+        # allow specifying different wheels based on the environment/OS, in a
+        # single requirements file.
+        if install_req.link and install_req.link.is_wheel:
+            wheel = Wheel(install_req.link.filename)
+            if self.check_supported_wheels and not wheel.supported():
+                raise InstallationError(
+                    "%s is not a supported wheel on this platform." %
+                    wheel.filename
+                )
+
+        # This next bit is really a sanity check.
+        assert install_req.is_direct == (parent_req_name is None), (
+            "a direct req shouldn't have a parent and also, "
+            "a non direct req should have a parent"
+        )
+
+        # Unnamed requirements are scanned again and the requirement won't be
+        # added as a dependency until after scanning.
+        if not name:
+            # url or path requirement w/o an egg fragment
+            self.unnamed_requirements.append(install_req)
+            return [install_req], None
+
+        try:
+            existing_req = self.get_requirement(name)
+        except KeyError:
+            existing_req = None
+
+        has_conflicting_requirement = (
+            parent_req_name is None and
+            existing_req and
+            not existing_req.constraint and
+            existing_req.extras == install_req.extras and
+            existing_req.req.specifier != install_req.req.specifier
+        )
+        if has_conflicting_requirement:
+            raise InstallationError(
+                "Double requirement given: %s (already in %s, name=%r)"
+                % (install_req, existing_req, name)
+            )
+
+        # When no existing requirement exists, add the requirement as a
+        # dependency and it will be scanned again after.
+        if not existing_req:
+            self.requirements[name] = install_req
+            # FIXME: what about other normalizations?  E.g., _ vs. -?
+            if name.lower() != name:
+                self.requirement_aliases[name.lower()] = name
+            # We'd want to rescan this requirements later
+            return [install_req], install_req
+
+        # Assume there's no need to scan, and that we've already
+        # encountered this for scanning.
+        if install_req.constraint or not existing_req.constraint:
+            return [], existing_req
+
+        does_not_satisfy_constraint = (
+            install_req.link and
+            not (
+                existing_req.link and
+                install_req.link.path == existing_req.link.path
+            )
+        )
+        if does_not_satisfy_constraint:
+            self.reqs_to_cleanup.append(install_req)
+            raise InstallationError(
+                "Could not satisfy constraints for '%s': "
+                "installation from path or url cannot be "
+                "constrained to a version" % name,
+            )
+        # If we're now installing a constraint, mark the existing
+        # object for real installation.
+        existing_req.constraint = False
+        existing_req.extras = tuple(sorted(
+            set(existing_req.extras) | set(install_req.extras)
+        ))
+        logger.debug(
+            "Setting %s extras to: %s",
+            existing_req, existing_req.extras,
+        )
+        # Return the existing requirement for addition to the parent and
+        # scanning again.
+        return [existing_req], existing_req
+
+    def has_requirement(self, project_name):
+        # type: (str) -> bool
+        name = project_name.lower()
+        if (name in self.requirements and
+           not self.requirements[name].constraint or
+           name in self.requirement_aliases and
+           not self.requirements[self.requirement_aliases[name]].constraint):
+            return True
+        return False
+
+    def get_requirement(self, project_name):
+        # type: (str) -> InstallRequirement
+        for name in project_name, project_name.lower():
+            if name in self.requirements:
+                return self.requirements[name]
+            if name in self.requirement_aliases:
+                return self.requirements[self.requirement_aliases[name]]
+        raise KeyError("No project with the name %r" % project_name)
+
+    def cleanup_files(self):
+        # type: () -> None
+        """Clean up files, remove builds."""
+        logger.debug('Cleaning up...')
+        with indent_log():
+            for req in self.reqs_to_cleanup:
+                req.remove_temporary_source()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_tracker.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_tracker.py
new file mode 100644
index 00000000..e36a3f6b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_tracker.py
@@ -0,0 +1,96 @@
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import hashlib
+import logging
+import os
+
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from types import TracebackType
+    from typing import Iterator, Optional, Set, Type
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.models.link import Link
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementTracker(object):
+
+    def __init__(self):
+        # type: () -> None
+        self._root = os.environ.get('PIP_REQ_TRACKER')
+        if self._root is None:
+            self._temp_dir = TempDirectory(delete=False, kind='req-tracker')
+            self._temp_dir.create()
+            self._root = os.environ['PIP_REQ_TRACKER'] = self._temp_dir.path
+            logger.debug('Created requirements tracker %r', self._root)
+        else:
+            self._temp_dir = None
+            logger.debug('Re-using requirements tracker %r', self._root)
+        self._entries = set()  # type: Set[InstallRequirement]
+
+    def __enter__(self):
+        # type: () -> RequirementTracker
+        return self
+
+    def __exit__(
+        self,
+        exc_type,  # type: Optional[Type[BaseException]]
+        exc_val,  # type: Optional[BaseException]
+        exc_tb  # type: Optional[TracebackType]
+    ):
+        # type: (...) -> None
+        self.cleanup()
+
+    def _entry_path(self, link):
+        # type: (Link) -> str
+        hashed = hashlib.sha224(link.url_without_fragment.encode()).hexdigest()
+        return os.path.join(self._root, hashed)
+
+    def add(self, req):
+        # type: (InstallRequirement) -> None
+        link = req.link
+        info = str(req)
+        entry_path = self._entry_path(link)
+        try:
+            with open(entry_path) as fp:
+                # Error, these's already a build in progress.
+                raise LookupError('%s is already being built: %s'
+                                  % (link, fp.read()))
+        except IOError as e:
+            if e.errno != errno.ENOENT:
+                raise
+            assert req not in self._entries
+            with open(entry_path, 'w') as fp:
+                fp.write(info)
+            self._entries.add(req)
+            logger.debug('Added %s to build tracker %r', req, self._root)
+
+    def remove(self, req):
+        # type: (InstallRequirement) -> None
+        link = req.link
+        self._entries.remove(req)
+        os.unlink(self._entry_path(link))
+        logger.debug('Removed %s from build tracker %r', req, self._root)
+
+    def cleanup(self):
+        # type: () -> None
+        for req in set(self._entries):
+            self.remove(req)
+        remove = self._temp_dir is not None
+        if remove:
+            self._temp_dir.cleanup()
+        logger.debug('%s build tracker %r',
+                     'Removed' if remove else 'Cleaned',
+                     self._root)
+
+    @contextlib.contextmanager
+    def track(self, req):
+        # type: (InstallRequirement) -> Iterator[None]
+        self.add(req)
+        yield
+        self.remove(req)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_uninstall.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_uninstall.py
new file mode 100644
index 00000000..733301ce
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/req/req_uninstall.py
@@ -0,0 +1,633 @@
+from __future__ import absolute_import
+
+import csv
+import functools
+import logging
+import os
+import sys
+import sysconfig
+
+from pip._vendor import pkg_resources
+
+from pip._internal.exceptions import UninstallationError
+from pip._internal.locations import bin_py, bin_user
+from pip._internal.utils.compat import WINDOWS, cache_from_source, uses_pycache
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    FakeFile, ask, dist_in_usersite, dist_is_local, egg_link_path, is_local,
+    normalize_path, renames, rmtree,
+)
+from pip._internal.utils.temp_dir import AdjacentTempDirectory, TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Callable, Dict, Iterable, Iterator, List, Optional, Set, Tuple,
+    )
+    from pip._vendor.pkg_resources import Distribution
+
+logger = logging.getLogger(__name__)
+
+
+def _script_names(dist, script_name, is_gui):
+    # type: (Distribution, str, bool) -> List[str]
+    """Create the fully qualified name of the files created by
+    {console,gui}_scripts for the given ``dist``.
+    Returns the list of file names
+    """
+    if dist_in_usersite(dist):
+        bin_dir = bin_user
+    else:
+        bin_dir = bin_py
+    exe_name = os.path.join(bin_dir, script_name)
+    paths_to_remove = [exe_name]
+    if WINDOWS:
+        paths_to_remove.append(exe_name + '.exe')
+        paths_to_remove.append(exe_name + '.exe.manifest')
+        if is_gui:
+            paths_to_remove.append(exe_name + '-script.pyw')
+        else:
+            paths_to_remove.append(exe_name + '-script.py')
+    return paths_to_remove
+
+
+def _unique(fn):
+    # type: (Callable) -> Callable[..., Iterator[Any]]
+    @functools.wraps(fn)
+    def unique(*args, **kw):
+        # type: (Any, Any) -> Iterator[Any]
+        seen = set()  # type: Set[Any]
+        for item in fn(*args, **kw):
+            if item not in seen:
+                seen.add(item)
+                yield item
+    return unique
+
+
+@_unique
+def uninstallation_paths(dist):
+    # type: (Distribution) -> Iterator[str]
+    """
+    Yield all the uninstallation paths for dist based on RECORD-without-.py[co]
+
+    Yield paths to all the files in RECORD. For each .py file in RECORD, add
+    the .pyc and .pyo in the same directory.
+
+    UninstallPathSet.add() takes care of the __pycache__ .py[co].
+    """
+    r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD')))
+    for row in r:
+        path = os.path.join(dist.location, row[0])
+        yield path
+        if path.endswith('.py'):
+            dn, fn = os.path.split(path)
+            base = fn[:-3]
+            path = os.path.join(dn, base + '.pyc')
+            yield path
+            path = os.path.join(dn, base + '.pyo')
+            yield path
+
+
+def compact(paths):
+    # type: (Iterable[str]) -> Set[str]
+    """Compact a path set to contain the minimal number of paths
+    necessary to contain all paths in the set. If /a/path/ and
+    /a/path/to/a/file.txt are both in the set, leave only the
+    shorter path."""
+
+    sep = os.path.sep
+    short_paths = set()  # type: Set[str]
+    for path in sorted(paths, key=len):
+        should_skip = any(
+            path.startswith(shortpath.rstrip("*")) and
+            path[len(shortpath.rstrip("*").rstrip(sep))] == sep
+            for shortpath in short_paths
+        )
+        if not should_skip:
+            short_paths.add(path)
+    return short_paths
+
+
+def compress_for_rename(paths):
+    # type: (Iterable[str]) -> Set[str]
+    """Returns a set containing the paths that need to be renamed.
+
+    This set may include directories when the original sequence of paths
+    included every file on disk.
+    """
+    case_map = dict((os.path.normcase(p), p) for p in paths)
+    remaining = set(case_map)
+    unchecked = sorted(set(os.path.split(p)[0]
+                           for p in case_map.values()), key=len)
+    wildcards = set()  # type: Set[str]
+
+    def norm_join(*a):
+        # type: (str) -> str
+        return os.path.normcase(os.path.join(*a))
+
+    for root in unchecked:
+        if any(os.path.normcase(root).startswith(w)
+               for w in wildcards):
+            # This directory has already been handled.
+            continue
+
+        all_files = set()  # type: Set[str]
+        all_subdirs = set()  # type: Set[str]
+        for dirname, subdirs, files in os.walk(root):
+            all_subdirs.update(norm_join(root, dirname, d)
+                               for d in subdirs)
+            all_files.update(norm_join(root, dirname, f)
+                             for f in files)
+        # If all the files we found are in our remaining set of files to
+        # remove, then remove them from the latter set and add a wildcard
+        # for the directory.
+        if not (all_files - remaining):
+            remaining.difference_update(all_files)
+            wildcards.add(root + os.sep)
+
+    return set(map(case_map.__getitem__, remaining)) | wildcards
+
+
+def compress_for_output_listing(paths):
+    # type: (Iterable[str]) -> Tuple[Set[str], Set[str]]
+    """Returns a tuple of 2 sets of which paths to display to user
+
+    The first set contains paths that would be deleted. Files of a package
+    are not added and the top-level directory of the package has a '*' added
+    at the end - to signify that all it's contents are removed.
+
+    The second set contains files that would have been skipped in the above
+    folders.
+    """
+
+    will_remove = set(paths)
+    will_skip = set()
+
+    # Determine folders and files
+    folders = set()
+    files = set()
+    for path in will_remove:
+        if path.endswith(".pyc"):
+            continue
+        if path.endswith("__init__.py") or ".dist-info" in path:
+            folders.add(os.path.dirname(path))
+        files.add(path)
+
+    # probably this one https://github.com/python/mypy/issues/390
+    _normcased_files = set(map(os.path.normcase, files))  # type: ignore
+
+    folders = compact(folders)
+
+    # This walks the tree using os.walk to not miss extra folders
+    # that might get added.
+    for folder in folders:
+        for dirpath, _, dirfiles in os.walk(folder):
+            for fname in dirfiles:
+                if fname.endswith(".pyc"):
+                    continue
+
+                file_ = os.path.join(dirpath, fname)
+                if (os.path.isfile(file_) and
+                        os.path.normcase(file_) not in _normcased_files):
+                    # We are skipping this file. Add it to the set.
+                    will_skip.add(file_)
+
+    will_remove = files | {
+        os.path.join(folder, "*") for folder in folders
+    }
+
+    return will_remove, will_skip
+
+
+class StashedUninstallPathSet(object):
+    """A set of file rename operations to stash files while
+    tentatively uninstalling them."""
+    def __init__(self):
+        # type: () -> None
+        # Mapping from source file root to [Adjacent]TempDirectory
+        # for files under that directory.
+        self._save_dirs = {}  # type: Dict[str, TempDirectory]
+        # (old path, new path) tuples for each move that may need
+        # to be undone.
+        self._moves = []  # type: List[Tuple[str, str]]
+
+    def _get_directory_stash(self, path):
+        # type: (str) -> str
+        """Stashes a directory.
+
+        Directories are stashed adjacent to their original location if
+        possible, or else moved/copied into the user's temp dir."""
+
+        try:
+            save_dir = AdjacentTempDirectory(path)  # type: TempDirectory
+            save_dir.create()
+        except OSError:
+            save_dir = TempDirectory(kind="uninstall")
+            save_dir.create()
+        self._save_dirs[os.path.normcase(path)] = save_dir
+
+        return save_dir.path
+
+    def _get_file_stash(self, path):
+        # type: (str) -> str
+        """Stashes a file.
+
+        If no root has been provided, one will be created for the directory
+        in the user's temp directory."""
+        path = os.path.normcase(path)
+        head, old_head = os.path.dirname(path), None
+        save_dir = None
+
+        while head != old_head:
+            try:
+                save_dir = self._save_dirs[head]
+                break
+            except KeyError:
+                pass
+            head, old_head = os.path.dirname(head), head
+        else:
+            # Did not find any suitable root
+            head = os.path.dirname(path)
+            save_dir = TempDirectory(kind='uninstall')
+            save_dir.create()
+            self._save_dirs[head] = save_dir
+
+        relpath = os.path.relpath(path, head)
+        if relpath and relpath != os.path.curdir:
+            return os.path.join(save_dir.path, relpath)
+        return save_dir.path
+
+    def stash(self, path):
+        # type: (str) -> str
+        """Stashes the directory or file and returns its new location.
+        """
+        if os.path.isdir(path):
+            new_path = self._get_directory_stash(path)
+        else:
+            new_path = self._get_file_stash(path)
+
+        self._moves.append((path, new_path))
+        if os.path.isdir(path) and os.path.isdir(new_path):
+            # If we're moving a directory, we need to
+            # remove the destination first or else it will be
+            # moved to inside the existing directory.
+            # We just created new_path ourselves, so it will
+            # be removable.
+            os.rmdir(new_path)
+        renames(path, new_path)
+        return new_path
+
+    def commit(self):
+        # type: () -> None
+        """Commits the uninstall by removing stashed files."""
+        for _, save_dir in self._save_dirs.items():
+            save_dir.cleanup()
+        self._moves = []
+        self._save_dirs = {}
+
+    def rollback(self):
+        # type: () -> None
+        """Undoes the uninstall by moving stashed files back."""
+        for p in self._moves:
+            logging.info("Moving to %s\n from %s", *p)
+
+        for new_path, path in self._moves:
+            try:
+                logger.debug('Replacing %s from %s', new_path, path)
+                if os.path.isfile(new_path):
+                    os.unlink(new_path)
+                elif os.path.isdir(new_path):
+                    rmtree(new_path)
+                renames(path, new_path)
+            except OSError as ex:
+                logger.error("Failed to restore %s", new_path)
+                logger.debug("Exception: %s", ex)
+
+        self.commit()
+
+    @property
+    def can_rollback(self):
+        # type: () -> bool
+        return bool(self._moves)
+
+
+class UninstallPathSet(object):
+    """A set of file paths to be removed in the uninstallation of a
+    requirement."""
+    def __init__(self, dist):
+        # type: (Distribution) -> None
+        self.paths = set()  # type: Set[str]
+        self._refuse = set()  # type: Set[str]
+        self.pth = {}  # type: Dict[str, UninstallPthEntries]
+        self.dist = dist
+        self._moved_paths = StashedUninstallPathSet()
+
+    def _permitted(self, path):
+        # type: (str) -> bool
+        """
+        Return True if the given path is one we are permitted to
+        remove/modify, False otherwise.
+
+        """
+        return is_local(path)
+
+    def add(self, path):
+        # type: (str) -> None
+        head, tail = os.path.split(path)
+
+        # we normalize the head to resolve parent directory symlinks, but not
+        # the tail, since we only want to uninstall symlinks, not their targets
+        path = os.path.join(normalize_path(head), os.path.normcase(tail))
+
+        if not os.path.exists(path):
+            return
+        if self._permitted(path):
+            self.paths.add(path)
+        else:
+            self._refuse.add(path)
+
+        # __pycache__ files can show up after 'installed-files.txt' is created,
+        # due to imports
+        if os.path.splitext(path)[1] == '.py' and uses_pycache:
+            self.add(cache_from_source(path))
+
+    def add_pth(self, pth_file, entry):
+        # type: (str, str) -> None
+        pth_file = normalize_path(pth_file)
+        if self._permitted(pth_file):
+            if pth_file not in self.pth:
+                self.pth[pth_file] = UninstallPthEntries(pth_file)
+            self.pth[pth_file].add(entry)
+        else:
+            self._refuse.add(pth_file)
+
+    def remove(self, auto_confirm=False, verbose=False):
+        # type: (bool, bool) -> None
+        """Remove paths in ``self.paths`` with confirmation (unless
+        ``auto_confirm`` is True)."""
+
+        if not self.paths:
+            logger.info(
+                "Can't uninstall '%s'. No files were found to uninstall.",
+                self.dist.project_name,
+            )
+            return
+
+        dist_name_version = (
+            self.dist.project_name + "-" + self.dist.version
+        )
+        logger.info('Uninstalling %s:', dist_name_version)
+
+        with indent_log():
+            if auto_confirm or self._allowed_to_proceed(verbose):
+                moved = self._moved_paths
+
+                for_rename = compress_for_rename(self.paths)
+
+                for path in sorted(compact(for_rename)):
+                    moved.stash(path)
+                    logger.debug('Removing file or directory %s', path)
+
+                for pth in self.pth.values():
+                    pth.remove()
+
+                logger.info('Successfully uninstalled %s', dist_name_version)
+
+    def _allowed_to_proceed(self, verbose):
+        # type: (bool) -> bool
+        """Display which files would be deleted and prompt for confirmation
+        """
+
+        def _display(msg, paths):
+            # type: (str, Iterable[str]) -> None
+            if not paths:
+                return
+
+            logger.info(msg)
+            with indent_log():
+                for path in sorted(compact(paths)):
+                    logger.info(path)
+
+        if not verbose:
+            will_remove, will_skip = compress_for_output_listing(self.paths)
+        else:
+            # In verbose mode, display all the files that are going to be
+            # deleted.
+            will_remove = set(self.paths)
+            will_skip = set()
+
+        _display('Would remove:', will_remove)
+        _display('Would not remove (might be manually added):', will_skip)
+        _display('Would not remove (outside of prefix):', self._refuse)
+        if verbose:
+            _display('Will actually move:', compress_for_rename(self.paths))
+
+        return ask('Proceed (y/n)? ', ('y', 'n')) == 'y'
+
+    def rollback(self):
+        # type: () -> None
+        """Rollback the changes previously made by remove()."""
+        if not self._moved_paths.can_rollback:
+            logger.error(
+                "Can't roll back %s; was not uninstalled",
+                self.dist.project_name,
+            )
+            return
+        logger.info('Rolling back uninstall of %s', self.dist.project_name)
+        self._moved_paths.rollback()
+        for pth in self.pth.values():
+            pth.rollback()
+
+    def commit(self):
+        # type: () -> None
+        """Remove temporary save dir: rollback will no longer be possible."""
+        self._moved_paths.commit()
+
+    @classmethod
+    def from_dist(cls, dist):
+        # type: (Distribution) -> UninstallPathSet
+        dist_path = normalize_path(dist.location)
+        if not dist_is_local(dist):
+            logger.info(
+                "Not uninstalling %s at %s, outside environment %s",
+                dist.key,
+                dist_path,
+                sys.prefix,
+            )
+            return cls(dist)
+
+        if dist_path in {p for p in {sysconfig.get_path("stdlib"),
+                                     sysconfig.get_path("platstdlib")}
+                         if p}:
+            logger.info(
+                "Not uninstalling %s at %s, as it is in the standard library.",
+                dist.key,
+                dist_path,
+            )
+            return cls(dist)
+
+        paths_to_remove = cls(dist)
+        develop_egg_link = egg_link_path(dist)
+        develop_egg_link_egg_info = '{}.egg-info'.format(
+            pkg_resources.to_filename(dist.project_name))
+        egg_info_exists = dist.egg_info and os.path.exists(dist.egg_info)
+        # Special case for distutils installed package
+        distutils_egg_info = getattr(dist._provider, 'path', None)
+
+        # Uninstall cases order do matter as in the case of 2 installs of the
+        # same package, pip needs to uninstall the currently detected version
+        if (egg_info_exists and dist.egg_info.endswith('.egg-info') and
+                not dist.egg_info.endswith(develop_egg_link_egg_info)):
+            # if dist.egg_info.endswith(develop_egg_link_egg_info), we
+            # are in fact in the develop_egg_link case
+            paths_to_remove.add(dist.egg_info)
+            if dist.has_metadata('installed-files.txt'):
+                for installed_file in dist.get_metadata(
+                        'installed-files.txt').splitlines():
+                    path = os.path.normpath(
+                        os.path.join(dist.egg_info, installed_file)
+                    )
+                    paths_to_remove.add(path)
+            # FIXME: need a test for this elif block
+            # occurs with --single-version-externally-managed/--record outside
+            # of pip
+            elif dist.has_metadata('top_level.txt'):
+                if dist.has_metadata('namespace_packages.txt'):
+                    namespaces = dist.get_metadata('namespace_packages.txt')
+                else:
+                    namespaces = []
+                for top_level_pkg in [
+                        p for p
+                        in dist.get_metadata('top_level.txt').splitlines()
+                        if p and p not in namespaces]:
+                    path = os.path.join(dist.location, top_level_pkg)
+                    paths_to_remove.add(path)
+                    paths_to_remove.add(path + '.py')
+                    paths_to_remove.add(path + '.pyc')
+                    paths_to_remove.add(path + '.pyo')
+
+        elif distutils_egg_info:
+            raise UninstallationError(
+                "Cannot uninstall {!r}. It is a distutils installed project "
+                "and thus we cannot accurately determine which files belong "
+                "to it which would lead to only a partial uninstall.".format(
+                    dist.project_name,
+                )
+            )
+
+        elif dist.location.endswith('.egg'):
+            # package installed by easy_install
+            # We cannot match on dist.egg_name because it can slightly vary
+            # i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
+            paths_to_remove.add(dist.location)
+            easy_install_egg = os.path.split(dist.location)[1]
+            easy_install_pth = os.path.join(os.path.dirname(dist.location),
+                                            'easy-install.pth')
+            paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
+
+        elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
+            for path in uninstallation_paths(dist):
+                paths_to_remove.add(path)
+
+        elif develop_egg_link:
+            # develop egg
+            with open(develop_egg_link, 'r') as fh:
+                link_pointer = os.path.normcase(fh.readline().strip())
+            assert (link_pointer == dist.location), (
+                'Egg-link %s does not match installed location of %s '
+                '(at %s)' % (link_pointer, dist.project_name, dist.location)
+            )
+            paths_to_remove.add(develop_egg_link)
+            easy_install_pth = os.path.join(os.path.dirname(develop_egg_link),
+                                            'easy-install.pth')
+            paths_to_remove.add_pth(easy_install_pth, dist.location)
+
+        else:
+            logger.debug(
+                'Not sure how to uninstall: %s - Check: %s',
+                dist, dist.location,
+            )
+
+        # find distutils scripts= scripts
+        if dist.has_metadata('scripts') and dist.metadata_isdir('scripts'):
+            for script in dist.metadata_listdir('scripts'):
+                if dist_in_usersite(dist):
+                    bin_dir = bin_user
+                else:
+                    bin_dir = bin_py
+                paths_to_remove.add(os.path.join(bin_dir, script))
+                if WINDOWS:
+                    paths_to_remove.add(os.path.join(bin_dir, script) + '.bat')
+
+        # find console_scripts
+        _scripts_to_remove = []
+        console_scripts = dist.get_entry_map(group='console_scripts')
+        for name in console_scripts.keys():
+            _scripts_to_remove.extend(_script_names(dist, name, False))
+        # find gui_scripts
+        gui_scripts = dist.get_entry_map(group='gui_scripts')
+        for name in gui_scripts.keys():
+            _scripts_to_remove.extend(_script_names(dist, name, True))
+
+        for s in _scripts_to_remove:
+            paths_to_remove.add(s)
+
+        return paths_to_remove
+
+
+class UninstallPthEntries(object):
+    def __init__(self, pth_file):
+        # type: (str) -> None
+        if not os.path.isfile(pth_file):
+            raise UninstallationError(
+                "Cannot remove entries from nonexistent file %s" % pth_file
+            )
+        self.file = pth_file
+        self.entries = set()  # type: Set[str]
+        self._saved_lines = None  # type: Optional[List[bytes]]
+
+    def add(self, entry):
+        # type: (str) -> None
+        entry = os.path.normcase(entry)
+        # On Windows, os.path.normcase converts the entry to use
+        # backslashes.  This is correct for entries that describe absolute
+        # paths outside of site-packages, but all the others use forward
+        # slashes.
+        if WINDOWS and not os.path.splitdrive(entry)[0]:
+            entry = entry.replace('\\', '/')
+        self.entries.add(entry)
+
+    def remove(self):
+        # type: () -> None
+        logger.debug('Removing pth entries from %s:', self.file)
+        with open(self.file, 'rb') as fh:
+            # windows uses '\r\n' with py3k, but uses '\n' with py2.x
+            lines = fh.readlines()
+            self._saved_lines = lines
+        if any(b'\r\n' in line for line in lines):
+            endline = '\r\n'
+        else:
+            endline = '\n'
+        # handle missing trailing newline
+        if lines and not lines[-1].endswith(endline.encode("utf-8")):
+            lines[-1] = lines[-1] + endline.encode("utf-8")
+        for entry in self.entries:
+            try:
+                logger.debug('Removing entry: %s', entry)
+                lines.remove((entry + endline).encode("utf-8"))
+            except ValueError:
+                pass
+        with open(self.file, 'wb') as fh:
+            fh.writelines(lines)
+
+    def rollback(self):
+        # type: () -> bool
+        if self._saved_lines is None:
+            logger.error(
+                'Cannot roll back changes to %s, none were made', self.file
+            )
+            return False
+        logger.debug('Rolling %s back to previous state', self.file)
+        with open(self.file, 'wb') as fh:
+            fh.writelines(self._saved_lines)
+        return True
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+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/setuptools_build.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/temp_dir.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/temp_dir.cpython-37.pyc
new file mode 100644
index 00000000..ef1701df
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/temp_dir.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/typing.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/typing.cpython-37.pyc
new file mode 100644
index 00000000..6f329e61
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/typing.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/ui.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/ui.cpython-37.pyc
new file mode 100644
index 00000000..90684aa7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/ui.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/virtualenv.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/virtualenv.cpython-37.pyc
new file mode 100644
index 00000000..69b60a11
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/__pycache__/virtualenv.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/appdirs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/appdirs.py
new file mode 100644
index 00000000..fb261110
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/appdirs.py
@@ -0,0 +1,268 @@
+"""
+This code was taken from https://github.com/ActiveState/appdirs and modified
+to suit our purposes.
+"""
+from __future__ import absolute_import
+
+import os
+import sys
+
+from pip._vendor.six import PY2, text_type
+
+from pip._internal.utils.compat import WINDOWS, expanduser
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+
+def user_cache_dir(appname):
+    # type: (str) -> str
+    r"""
+    Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+
+    Typical user cache directories are:
+        macOS:      ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Windows:    C:\Users\<username>\AppData\Local\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go
+    in the `CSIDL_LOCAL_APPDATA` directory. This is identical to the
+    non-roaming app data dir (the default returned by `user_data_dir`). Apps
+    typically put cache data somewhere *under* the given dir here. Some
+    examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    """
+    if WINDOWS:
+        # Get the base path
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+
+        # When using Python 2, return paths as bytes on Windows like we do on
+        # other operating systems. See helper function docs for more details.
+        if PY2 and isinstance(path, text_type):
+            path = _win_path_to_bytes(path)
+
+        # Add our app name and Cache directory to it
+        path = os.path.join(path, appname, "Cache")
+    elif sys.platform == "darwin":
+        # Get the base path
+        path = expanduser("~/Library/Caches")
+
+        # Add our app name to it
+        path = os.path.join(path, appname)
+    else:
+        # Get the base path
+        path = os.getenv("XDG_CACHE_HOME", expanduser("~/.cache"))
+
+        # Add our app name to it
+        path = os.path.join(path, appname)
+
+    return path
+
+
+def user_data_dir(appname, roaming=False):
+    # type: (str, bool) -> str
+    r"""
+    Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        macOS:                  ~/Library/Application Support/<AppName>
+                                if it exists, else ~/.config/<AppName>
+        Unix:                   ~/.local/share/<AppName>    # or in
+                                $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\ ...
+                                ...Application Data\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local ...
+                                ...Settings\Application Data\<AppName>
+        Win 7  (not roaming):   C:\\Users\<username>\AppData\Local\<AppName>
+        Win 7  (roaming):       C:\\Users\<username>\AppData\Roaming\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if WINDOWS:
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.join(os.path.normpath(_get_win_folder(const)), appname)
+    elif sys.platform == "darwin":
+        path = os.path.join(
+            expanduser('~/Library/Application Support/'),
+            appname,
+        ) if os.path.isdir(os.path.join(
+            expanduser('~/Library/Application Support/'),
+            appname,
+        )
+        ) else os.path.join(
+            expanduser('~/.config/'),
+            appname,
+        )
+    else:
+        path = os.path.join(
+            os.getenv('XDG_DATA_HOME', expanduser("~/.local/share")),
+            appname,
+        )
+
+    return path
+
+
+def user_config_dir(appname, roaming=True):
+    # type: (str, bool) -> str
+    """Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "roaming" (boolean, default True) can be set False to not use the
+            Windows roaming appdata directory. That means that for users on a
+            Windows network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        macOS:                  same as user_data_dir
+        Unix:                   ~/.config/<AppName>
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if WINDOWS:
+        path = user_data_dir(appname, roaming=roaming)
+    elif sys.platform == "darwin":
+        path = user_data_dir(appname)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', expanduser("~/.config"))
+        path = os.path.join(path, appname)
+
+    return path
+
+
+# for the discussion regarding site_config_dirs locations
+# see <https://github.com/pypa/pip/issues/1733>
+def site_config_dirs(appname):
+    # type: (str) -> List[str]
+    r"""Return a list of potential user-shared config dirs for this application.
+
+        "appname" is the name of application.
+
+    Typical user config directories are:
+        macOS:      /Library/Application Support/<AppName>/
+        Unix:       /etc or $XDG_CONFIG_DIRS[i]/<AppName>/ for each value in
+                    $XDG_CONFIG_DIRS
+        Win XP:     C:\Documents and Settings\All Users\Application ...
+                    ...Data\<AppName>\
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory
+                    on Vista.)
+        Win 7:      Hidden, but writeable on Win 7:
+                    C:\ProgramData\<AppName>\
+    """
+    if WINDOWS:
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        pathlist = [os.path.join(path, appname)]
+    elif sys.platform == 'darwin':
+        pathlist = [os.path.join('/Library/Application Support', appname)]
+    else:
+        # try looking in $XDG_CONFIG_DIRS
+        xdg_config_dirs = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
+        if xdg_config_dirs:
+            pathlist = [
+                os.path.join(expanduser(x), appname)
+                for x in xdg_config_dirs.split(os.pathsep)
+            ]
+        else:
+            pathlist = []
+
+        # always look in /etc directly as well
+        pathlist.append('/etc')
+
+    return pathlist
+
+
+# -- Windows support functions --
+
+def _get_win_folder_from_registry(csidl_name):
+    # type: (str) -> str
+    """
+    This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    directory, _type = _winreg.QueryValueEx(key, shell_folder_name)
+    return directory
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    # type: (str) -> str
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+
+if WINDOWS:
+    try:
+        import ctypes
+        _get_win_folder = _get_win_folder_with_ctypes
+    except ImportError:
+        _get_win_folder = _get_win_folder_from_registry
+
+
+def _win_path_to_bytes(path):
+    """Encode Windows paths to bytes. Only used on Python 2.
+
+    Motivation is to be consistent with other operating systems where paths
+    are also returned as bytes. This avoids problems mixing bytes and Unicode
+    elsewhere in the codebase. For more details and discussion see
+    <https://github.com/pypa/pip/issues/3463>.
+
+    If encoding using ASCII and MBCS fails, return the original Unicode path.
+    """
+    for encoding in ('ASCII', 'MBCS'):
+        try:
+            return path.encode(encoding)
+        except (UnicodeEncodeError, LookupError):
+            pass
+    return path
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/compat.py
new file mode 100644
index 00000000..ec3995c2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/compat.py
@@ -0,0 +1,293 @@
+"""Stuff that differs in different Python versions and platform
+distributions."""
+from __future__ import absolute_import, division
+
+import codecs
+import locale
+import logging
+import os
+import shutil
+import sys
+
+from pip._vendor.six import text_type
+from pip._vendor.urllib3.util import IS_PYOPENSSL
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Text, Tuple, Union
+
+try:
+    import _ssl  # noqa
+except ImportError:
+    ssl = None
+else:
+    # This additional assignment was needed to prevent a mypy error.
+    ssl = _ssl
+
+try:
+    import ipaddress
+except ImportError:
+    try:
+        from pip._vendor import ipaddress  # type: ignore
+    except ImportError:
+        import ipaddr as ipaddress  # type: ignore
+        ipaddress.ip_address = ipaddress.IPAddress  # type: ignore
+        ipaddress.ip_network = ipaddress.IPNetwork  # type: ignore
+
+
+__all__ = [
+    "ipaddress", "uses_pycache", "console_to_str", "native_str",
+    "get_path_uid", "stdlib_pkgs", "WINDOWS", "samefile", "get_terminal_size",
+    "get_extension_suffixes",
+]
+
+
+logger = logging.getLogger(__name__)
+
+HAS_TLS = (ssl is not None) or IS_PYOPENSSL
+
+if sys.version_info >= (3, 4):
+    uses_pycache = True
+    from importlib.util import cache_from_source
+else:
+    import imp
+
+    try:
+        cache_from_source = imp.cache_from_source  # type: ignore
+    except AttributeError:
+        # does not use __pycache__
+        cache_from_source = None
+
+    uses_pycache = cache_from_source is not None
+
+
+if sys.version_info >= (3, 5):
+    backslashreplace_decode = "backslashreplace"
+else:
+    # In version 3.4 and older, backslashreplace exists
+    # but does not support use for decoding.
+    # We implement our own replace handler for this
+    # situation, so that we can consistently use
+    # backslash replacement for all versions.
+    def backslashreplace_decode_fn(err):
+        raw_bytes = (err.object[i] for i in range(err.start, err.end))
+        if sys.version_info[0] == 2:
+            # Python 2 gave us characters - convert to numeric bytes
+            raw_bytes = (ord(b) for b in raw_bytes)
+        return u"".join(u"\\x%x" % c for c in raw_bytes), err.end
+    codecs.register_error(
+        "backslashreplace_decode",
+        backslashreplace_decode_fn,
+    )
+    backslashreplace_decode = "backslashreplace_decode"
+
+
+def str_to_display(data, desc=None):
+    # type: (Union[bytes, Text], Optional[str]) -> Text
+    """
+    For display or logging purposes, convert a bytes object (or text) to
+    text (e.g. unicode in Python 2) safe for output.
+
+    :param desc: An optional phrase describing the input data, for use in
+        the log message if a warning is logged. Defaults to "Bytes object".
+
+    This function should never error out and so can take a best effort
+    approach. It is okay to be lossy if needed since the return value is
+    just for display.
+
+    We assume the data is in the locale preferred encoding. If it won't
+    decode properly, we warn the user but decode as best we can.
+
+    We also ensure that the output can be safely written to standard output
+    without encoding errors.
+    """
+    if isinstance(data, text_type):
+        return data
+
+    # Otherwise, data is a bytes object (str in Python 2).
+    # First, get the encoding we assume. This is the preferred
+    # encoding for the locale, unless that is not found, or
+    # it is ASCII, in which case assume UTF-8
+    encoding = locale.getpreferredencoding()
+    if (not encoding) or codecs.lookup(encoding).name == "ascii":
+        encoding = "utf-8"
+
+    # Now try to decode the data - if we fail, warn the user and
+    # decode with replacement.
+    try:
+        decoded_data = data.decode(encoding)
+    except UnicodeDecodeError:
+        if desc is None:
+            desc = 'Bytes object'
+        msg_format = '{} does not appear to be encoded as %s'.format(desc)
+        logger.warning(msg_format, encoding)
+        decoded_data = data.decode(encoding, errors=backslashreplace_decode)
+
+    # Make sure we can print the output, by encoding it to the output
+    # encoding with replacement of unencodable characters, and then
+    # decoding again.
+    # We use stderr's encoding because it's less likely to be
+    # redirected and if we don't find an encoding we skip this
+    # step (on the assumption that output is wrapped by something
+    # that won't fail).
+    # The double getattr is to deal with the possibility that we're
+    # being called in a situation where sys.__stderr__ doesn't exist,
+    # or doesn't have an encoding attribute. Neither of these cases
+    # should occur in normal pip use, but there's no harm in checking
+    # in case people use pip in (unsupported) unusual situations.
+    output_encoding = getattr(getattr(sys, "__stderr__", None),
+                              "encoding", None)
+
+    if output_encoding:
+        output_encoded = decoded_data.encode(
+            output_encoding,
+            errors="backslashreplace"
+        )
+        decoded_data = output_encoded.decode(output_encoding)
+
+    return decoded_data
+
+
+def console_to_str(data):
+    # type: (bytes) -> Text
+    """Return a string, safe for output, of subprocess output.
+    """
+    return str_to_display(data, desc='Subprocess output')
+
+
+if sys.version_info >= (3,):
+    def native_str(s, replace=False):
+        # type: (str, bool) -> str
+        if isinstance(s, bytes):
+            return s.decode('utf-8', 'replace' if replace else 'strict')
+        return s
+
+else:
+    def native_str(s, replace=False):
+        # type: (str, bool) -> str
+        # Replace is ignored -- unicode to UTF-8 can't fail
+        if isinstance(s, text_type):
+            return s.encode('utf-8')
+        return s
+
+
+def get_path_uid(path):
+    # type: (str) -> int
+    """
+    Return path's uid.
+
+    Does not follow symlinks:
+        https://github.com/pypa/pip/pull/935#discussion_r5307003
+
+    Placed this function in compat due to differences on AIX and
+    Jython, that should eventually go away.
+
+    :raises OSError: When path is a symlink or can't be read.
+    """
+    if hasattr(os, 'O_NOFOLLOW'):
+        fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
+        file_uid = os.fstat(fd).st_uid
+        os.close(fd)
+    else:  # AIX and Jython
+        # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW
+        if not os.path.islink(path):
+            # older versions of Jython don't have `os.fstat`
+            file_uid = os.stat(path).st_uid
+        else:
+            # raise OSError for parity with os.O_NOFOLLOW above
+            raise OSError(
+                "%s is a symlink; Will not return uid for symlinks" % path
+            )
+    return file_uid
+
+
+if sys.version_info >= (3, 4):
+    from importlib.machinery import EXTENSION_SUFFIXES
+
+    def get_extension_suffixes():
+        return EXTENSION_SUFFIXES
+else:
+    from imp import get_suffixes
+
+    def get_extension_suffixes():
+        return [suffix[0] for suffix in get_suffixes()]
+
+
+def expanduser(path):
+    # type: (str) -> str
+    """
+    Expand ~ and ~user constructions.
+
+    Includes a workaround for https://bugs.python.org/issue14768
+    """
+    expanded = os.path.expanduser(path)
+    if path.startswith('~/') and expanded.startswith('//'):
+        expanded = expanded[1:]
+    return expanded
+
+
+# packages in the stdlib that may have installation metadata, but should not be
+# considered 'installed'.  this theoretically could be determined based on
+# dist.location (py27:`sysconfig.get_paths()['stdlib']`,
+# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
+# make this ineffective, so hard-coding
+stdlib_pkgs = {"python", "wsgiref", "argparse"}
+
+
+# windows detection, covers cpython and ironpython
+WINDOWS = (sys.platform.startswith("win") or
+           (sys.platform == 'cli' and os.name == 'nt'))
+
+
+def samefile(file1, file2):
+    # type: (str, str) -> bool
+    """Provide an alternative for os.path.samefile on Windows/Python2"""
+    if hasattr(os.path, 'samefile'):
+        return os.path.samefile(file1, file2)
+    else:
+        path1 = os.path.normcase(os.path.abspath(file1))
+        path2 = os.path.normcase(os.path.abspath(file2))
+        return path1 == path2
+
+
+if hasattr(shutil, 'get_terminal_size'):
+    def get_terminal_size():
+        # type: () -> Tuple[int, int]
+        """
+        Returns a tuple (x, y) representing the width(x) and the height(y)
+        in characters of the terminal window.
+        """
+        return tuple(shutil.get_terminal_size())  # type: ignore
+else:
+    def get_terminal_size():
+        # type: () -> Tuple[int, int]
+        """
+        Returns a tuple (x, y) representing the width(x) and the height(y)
+        in characters of the terminal window.
+        """
+        def ioctl_GWINSZ(fd):
+            try:
+                import fcntl
+                import termios
+                import struct
+                cr = struct.unpack_from(
+                    'hh',
+                    fcntl.ioctl(fd, termios.TIOCGWINSZ, '12345678')
+                )
+            except Exception:
+                return None
+            if cr == (0, 0):
+                return None
+            return cr
+        cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
+        if not cr:
+            try:
+                fd = os.open(os.ctermid(), os.O_RDONLY)
+                cr = ioctl_GWINSZ(fd)
+                os.close(fd)
+            except Exception:
+                pass
+        if not cr:
+            cr = (os.environ.get('LINES', 25), os.environ.get('COLUMNS', 80))
+        return int(cr[1]), int(cr[0])
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/deprecation.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/deprecation.py
new file mode 100644
index 00000000..b9359bdd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/deprecation.py
@@ -0,0 +1,100 @@
+"""
+A module that implements tooling to enable easy warnings about deprecations.
+"""
+from __future__ import absolute_import
+
+import logging
+import warnings
+
+from pip._vendor.packaging.version import parse
+
+from pip import __version__ as current_version
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Optional
+
+
+DEPRECATION_MSG_PREFIX = "DEPRECATION: "
+
+
+class PipDeprecationWarning(Warning):
+    pass
+
+
+_original_showwarning = None  # type: Any
+
+
+# Warnings <-> Logging Integration
+def _showwarning(message, category, filename, lineno, file=None, line=None):
+    if file is not None:
+        if _original_showwarning is not None:
+            _original_showwarning(
+                message, category, filename, lineno, file, line,
+            )
+    elif issubclass(category, PipDeprecationWarning):
+        # We use a specially named logger which will handle all of the
+        # deprecation messages for pip.
+        logger = logging.getLogger("pip._internal.deprecations")
+        logger.warning(message)
+    else:
+        _original_showwarning(
+            message, category, filename, lineno, file, line,
+        )
+
+
+def install_warning_logger():
+    # type: () -> None
+    # Enable our Deprecation Warnings
+    warnings.simplefilter("default", PipDeprecationWarning, append=True)
+
+    global _original_showwarning
+
+    if _original_showwarning is None:
+        _original_showwarning = warnings.showwarning
+        warnings.showwarning = _showwarning
+
+
+def deprecated(reason, replacement, gone_in, issue=None):
+    # type: (str, Optional[str], Optional[str], Optional[int]) -> None
+    """Helper to deprecate existing functionality.
+
+    reason:
+        Textual reason shown to the user about why this functionality has
+        been deprecated.
+    replacement:
+        Textual suggestion shown to the user about what alternative
+        functionality they can use.
+    gone_in:
+        The version of pip does this functionality should get removed in.
+        Raises errors if pip's current version is greater than or equal to
+        this.
+    issue:
+        Issue number on the tracker that would serve as a useful place for
+        users to find related discussion and provide feedback.
+
+    Always pass replacement, gone_in and issue as keyword arguments for clarity
+    at the call site.
+    """
+
+    # Construct a nice message.
+    #   This is eagerly formatted as we want it to get logged as if someone
+    #   typed this entire message out.
+    sentences = [
+        (reason, DEPRECATION_MSG_PREFIX + "{}"),
+        (gone_in, "pip {} will remove support for this functionality."),
+        (replacement, "A possible replacement is {}."),
+        (issue, (
+            "You can find discussion regarding this at "
+            "https://github.com/pypa/pip/issues/{}."
+        )),
+    ]
+    message = " ".join(
+        template.format(val) for val, template in sentences if val is not None
+    )
+
+    # Raise as an error if it has to be removed.
+    if gone_in is not None and parse(current_version) >= parse(gone_in):
+        raise PipDeprecationWarning(message)
+
+    warnings.warn(message, category=PipDeprecationWarning, stacklevel=2)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/encoding.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/encoding.py
new file mode 100644
index 00000000..30139f2e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/encoding.py
@@ -0,0 +1,39 @@
+import codecs
+import locale
+import re
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Tuple, Text
+
+BOMS = [
+    (codecs.BOM_UTF8, 'utf-8'),
+    (codecs.BOM_UTF16, 'utf-16'),
+    (codecs.BOM_UTF16_BE, 'utf-16-be'),
+    (codecs.BOM_UTF16_LE, 'utf-16-le'),
+    (codecs.BOM_UTF32, 'utf-32'),
+    (codecs.BOM_UTF32_BE, 'utf-32-be'),
+    (codecs.BOM_UTF32_LE, 'utf-32-le'),
+]  # type: List[Tuple[bytes, Text]]
+
+ENCODING_RE = re.compile(br'coding[:=]\s*([-\w.]+)')
+
+
+def auto_decode(data):
+    # type: (bytes) -> Text
+    """Check a bytes string for a BOM to correctly detect the encoding
+
+    Fallback to locale.getpreferredencoding(False) like open() on Python3"""
+    for bom, encoding in BOMS:
+        if data.startswith(bom):
+            return data[len(bom):].decode(encoding)
+    # Lets check the first two lines as in PEP263
+    for line in data.split(b'\n')[:2]:
+        if line[0:1] == b'#' and ENCODING_RE.search(line):
+            encoding = ENCODING_RE.search(line).groups()[0].decode('ascii')
+            return data.decode(encoding)
+    return data.decode(
+        locale.getpreferredencoding(False) or sys.getdefaultencoding(),
+    )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/filesystem.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/filesystem.py
new file mode 100644
index 00000000..1e6b0338
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/filesystem.py
@@ -0,0 +1,30 @@
+import os
+import os.path
+
+from pip._internal.utils.compat import get_path_uid
+
+
+def check_path_owner(path):
+    # type: (str) -> bool
+    # If we don't have a way to check the effective uid of this process, then
+    # we'll just assume that we own the directory.
+    if not hasattr(os, "geteuid"):
+        return True
+
+    previous = None
+    while path != previous:
+        if os.path.lexists(path):
+            # Check if path is writable by current user.
+            if os.geteuid() == 0:
+                # Special handling for root user in order to handle properly
+                # cases where users use sudo without -H flag.
+                try:
+                    path_uid = get_path_uid(path)
+                except OSError:
+                    return False
+                return path_uid == 0
+            else:
+                return os.access(path, os.W_OK)
+        else:
+            previous, path = path, os.path.dirname(path)
+    return False  # assume we don't own the path
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/glibc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/glibc.py
new file mode 100644
index 00000000..aa77d9b6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/glibc.py
@@ -0,0 +1,120 @@
+from __future__ import absolute_import
+
+import os
+import re
+import warnings
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+
+
+def glibc_version_string():
+    # type: () -> Optional[str]
+    "Returns glibc version string, or None if not using glibc."
+    return glibc_version_string_confstr() or glibc_version_string_ctypes()
+
+
+def glibc_version_string_confstr():
+    # type: () -> Optional[str]
+    "Primary implementation of glibc_version_string using os.confstr."
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module:
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17":
+        _, version = os.confstr("CS_GNU_LIBC_VERSION").split()
+    except (AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def glibc_version_string_ctypes():
+    # type: () -> Optional[str]
+    "Fallback implementation of glibc_version_string using ctypes."
+
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# Separated out from have_compatible_glibc for easier unit testing
+def check_glibc_version(version_str, required_major, minimum_minor):
+    # type: (str, int, int) -> bool
+    # Parse string and check against requested version.
+    #
+    # We use a regexp instead of str.split because we want to discard any
+    # random junk that might come after the minor version -- this might happen
+    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    # uses version strings like "2.20-2014.11"). See gh-3588.
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn("Expected glibc version with 2 components major.minor,"
+                      " got: %s" % version_str, RuntimeWarning)
+        return False
+    return (int(m.group("major")) == required_major and
+            int(m.group("minor")) >= minimum_minor)
+
+
+def have_compatible_glibc(required_major, minimum_minor):
+    # type: (int, int) -> bool
+    version_str = glibc_version_string()
+    if version_str is None:
+        return False
+    return check_glibc_version(version_str, required_major, minimum_minor)
+
+
+# platform.libc_ver regularly returns completely nonsensical glibc
+# versions. E.g. on my computer, platform says:
+#
+#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.7')
+#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.9')
+#
+# But the truth is:
+#
+#   ~$ ldd --version
+#   ldd (Debian GLIBC 2.22-11) 2.22
+#
+# This is unfortunate, because it means that the linehaul data on libc
+# versions that was generated by pip 8.1.2 and earlier is useless and
+# misleading. Solution: instead of using platform, use our code that actually
+# works.
+def libc_ver():
+    # type: () -> Tuple[str, str]
+    """Try to determine the glibc version
+
+    Returns a tuple of strings (lib, version) which default to empty strings
+    in case the lookup fails.
+    """
+    glibc_version = glibc_version_string()
+    if glibc_version is None:
+        return ("", "")
+    else:
+        return ("glibc", glibc_version)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/hashes.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/hashes.py
new file mode 100644
index 00000000..e8aabe1a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/hashes.py
@@ -0,0 +1,128 @@
+from __future__ import absolute_import
+
+import hashlib
+
+from pip._vendor.six import iteritems, iterkeys, itervalues
+
+from pip._internal.exceptions import (
+    HashMismatch, HashMissing, InstallationError,
+)
+from pip._internal.utils.misc import read_chunks
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Dict, List, BinaryIO, NoReturn, Iterator
+    )
+    from pip._vendor.six import PY3
+    if PY3:
+        from hashlib import _Hash
+    else:
+        from hashlib import _hash as _Hash
+
+
+# The recommended hash algo of the moment. Change this whenever the state of
+# the art changes; it won't hurt backward compatibility.
+FAVORITE_HASH = 'sha256'
+
+
+# Names of hashlib algorithms allowed by the --hash option and ``pip hash``
+# Currently, those are the ones at least as collision-resistant as sha256.
+STRONG_HASHES = ['sha256', 'sha384', 'sha512']
+
+
+class Hashes(object):
+    """A wrapper that builds multiple hashes at once and checks them against
+    known-good values
+
+    """
+    def __init__(self, hashes=None):
+        # type: (Dict[str, List[str]]) -> None
+        """
+        :param hashes: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        """
+        self._allowed = {} if hashes is None else hashes
+
+    @property
+    def digest_count(self):
+        # type: () -> int
+        return sum(len(digests) for digests in self._allowed.values())
+
+    def is_hash_allowed(
+        self,
+        hash_name,   # type: str
+        hex_digest,  # type: str
+    ):
+        """Return whether the given hex digest is allowed."""
+        return hex_digest in self._allowed.get(hash_name, [])
+
+    def check_against_chunks(self, chunks):
+        # type: (Iterator[bytes]) -> None
+        """Check good hashes against ones built from iterable of chunks of
+        data.
+
+        Raise HashMismatch if none match.
+
+        """
+        gots = {}
+        for hash_name in iterkeys(self._allowed):
+            try:
+                gots[hash_name] = hashlib.new(hash_name)
+            except (ValueError, TypeError):
+                raise InstallationError('Unknown hash name: %s' % hash_name)
+
+        for chunk in chunks:
+            for hash in itervalues(gots):
+                hash.update(chunk)
+
+        for hash_name, got in iteritems(gots):
+            if got.hexdigest() in self._allowed[hash_name]:
+                return
+        self._raise(gots)
+
+    def _raise(self, gots):
+        # type: (Dict[str, _Hash]) -> NoReturn
+        raise HashMismatch(self._allowed, gots)
+
+    def check_against_file(self, file):
+        # type: (BinaryIO) -> None
+        """Check good hashes against a file-like object
+
+        Raise HashMismatch if none match.
+
+        """
+        return self.check_against_chunks(read_chunks(file))
+
+    def check_against_path(self, path):
+        # type: (str) -> None
+        with open(path, 'rb') as file:
+            return self.check_against_file(file)
+
+    def __nonzero__(self):
+        # type: () -> bool
+        """Return whether I know any known-good hashes."""
+        return bool(self._allowed)
+
+    def __bool__(self):
+        # type: () -> bool
+        return self.__nonzero__()
+
+
+class MissingHashes(Hashes):
+    """A workalike for Hashes used when we're missing a hash for a requirement
+
+    It computes the actual hash of the requirement and raises a HashMissing
+    exception showing it to the user.
+
+    """
+    def __init__(self):
+        # type: () -> None
+        """Don't offer the ``hashes`` kwarg."""
+        # Pass our favorite hash in to generate a "gotten hash". With the
+        # empty list, it will never match, so an error will always raise.
+        super(MissingHashes, self).__init__(hashes={FAVORITE_HASH: []})
+
+    def _raise(self, gots):
+        # type: (Dict[str, _Hash]) -> NoReturn
+        raise HashMissing(gots[FAVORITE_HASH].hexdigest())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/logging.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/logging.py
new file mode 100644
index 00000000..3fbec712
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/logging.py
@@ -0,0 +1,394 @@
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import logging
+import logging.handlers
+import os
+import sys
+from logging import Filter
+
+from pip._vendor.six import PY2
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
+from pip._internal.utils.misc import ensure_dir, subprocess_logger
+
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading  # type: ignore
+
+
+try:
+    # Use "import as" and set colorama in the else clause to avoid mypy
+    # errors and get the following correct revealed type for colorama:
+    # `Union[_importlib_modulespec.ModuleType, None]`
+    # Otherwise, we get an error like the following in the except block:
+    #  > Incompatible types in assignment (expression has type "None",
+    #   variable has type Module)
+    # TODO: eliminate the need to use "import as" once mypy addresses some
+    #  of its issues with conditional imports. Here is an umbrella issue:
+    #  https://github.com/python/mypy/issues/1297
+    from pip._vendor import colorama as _colorama
+# Lots of different errors can come from this, including SystemError and
+# ImportError.
+except Exception:
+    colorama = None
+else:
+    # Import Fore explicitly rather than accessing below as colorama.Fore
+    # to avoid the following error running mypy:
+    # > Module has no attribute "Fore"
+    # TODO: eliminate the need to import Fore once mypy addresses some of its
+    #  issues with conditional imports. This particular case could be an
+    #  instance of the following issue (but also see the umbrella issue above):
+    #  https://github.com/python/mypy/issues/3500
+    from pip._vendor.colorama import Fore
+
+    colorama = _colorama
+
+
+_log_state = threading.local()
+_log_state.indentation = 0
+
+
+class BrokenStdoutLoggingError(Exception):
+    """
+    Raised if BrokenPipeError occurs for the stdout stream while logging.
+    """
+    pass
+
+
+# BrokenPipeError does not exist in Python 2 and, in addition, manifests
+# differently in Windows and non-Windows.
+if WINDOWS:
+    # In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
+    # https://bugs.python.org/issue19612
+    # https://bugs.python.org/issue30418
+    if PY2:
+        def _is_broken_pipe_error(exc_class, exc):
+            """See the docstring for non-Windows Python 3 below."""
+            return (exc_class is IOError and
+                    exc.errno in (errno.EINVAL, errno.EPIPE))
+    else:
+        # In Windows, a broken pipe IOError became OSError in Python 3.
+        def _is_broken_pipe_error(exc_class, exc):
+            """See the docstring for non-Windows Python 3 below."""
+            return ((exc_class is BrokenPipeError) or  # noqa: F821
+                    (exc_class is OSError and
+                     exc.errno in (errno.EINVAL, errno.EPIPE)))
+elif PY2:
+    def _is_broken_pipe_error(exc_class, exc):
+        """See the docstring for non-Windows Python 3 below."""
+        return (exc_class is IOError and exc.errno == errno.EPIPE)
+else:
+    # Then we are in the non-Windows Python 3 case.
+    def _is_broken_pipe_error(exc_class, exc):
+        """
+        Return whether an exception is a broken pipe error.
+
+        Args:
+          exc_class: an exception class.
+          exc: an exception instance.
+        """
+        return (exc_class is BrokenPipeError)  # noqa: F821
+
+
+@contextlib.contextmanager
+def indent_log(num=2):
+    """
+    A context manager which will cause the log output to be indented for any
+    log messages emitted inside it.
+    """
+    _log_state.indentation += num
+    try:
+        yield
+    finally:
+        _log_state.indentation -= num
+
+
+def get_indentation():
+    return getattr(_log_state, 'indentation', 0)
+
+
+class IndentingFormatter(logging.Formatter):
+
+    def __init__(self, *args, **kwargs):
+        """
+        A logging.Formatter that obeys the indent_log() context manager.
+
+        :param add_timestamp: A bool indicating output lines should be prefixed
+            with their record's timestamp.
+        """
+        self.add_timestamp = kwargs.pop("add_timestamp", False)
+        super(IndentingFormatter, self).__init__(*args, **kwargs)
+
+    def get_message_start(self, formatted, levelno):
+        """
+        Return the start of the formatted log message (not counting the
+        prefix to add to each line).
+        """
+        if levelno < logging.WARNING:
+            return ''
+        if formatted.startswith(DEPRECATION_MSG_PREFIX):
+            # Then the message already has a prefix.  We don't want it to
+            # look like "WARNING: DEPRECATION: ...."
+            return ''
+        if levelno < logging.ERROR:
+            return 'WARNING: '
+
+        return 'ERROR: '
+
+    def format(self, record):
+        """
+        Calls the standard formatter, but will indent all of the log message
+        lines by our current indentation level.
+        """
+        formatted = super(IndentingFormatter, self).format(record)
+        message_start = self.get_message_start(formatted, record.levelno)
+        formatted = message_start + formatted
+
+        prefix = ''
+        if self.add_timestamp:
+            # TODO: Use Formatter.default_time_format after dropping PY2.
+            t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
+            prefix = '%s,%03d ' % (t, record.msecs)
+        prefix += " " * get_indentation()
+        formatted = "".join([
+            prefix + line
+            for line in formatted.splitlines(True)
+        ])
+        return formatted
+
+
+def _color_wrap(*colors):
+    def wrapped(inp):
+        return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
+    return wrapped
+
+
+class ColorizedStreamHandler(logging.StreamHandler):
+
+    # Don't build up a list of colors if we don't have colorama
+    if colorama:
+        COLORS = [
+            # This needs to be in order from highest logging level to lowest.
+            (logging.ERROR, _color_wrap(Fore.RED)),
+            (logging.WARNING, _color_wrap(Fore.YELLOW)),
+        ]
+    else:
+        COLORS = []
+
+    def __init__(self, stream=None, no_color=None):
+        logging.StreamHandler.__init__(self, stream)
+        self._no_color = no_color
+
+        if WINDOWS and colorama:
+            self.stream = colorama.AnsiToWin32(self.stream)
+
+    def _using_stdout(self):
+        """
+        Return whether the handler is using sys.stdout.
+        """
+        if WINDOWS and colorama:
+            # Then self.stream is an AnsiToWin32 object.
+            return self.stream.wrapped is sys.stdout
+
+        return self.stream is sys.stdout
+
+    def should_color(self):
+        # Don't colorize things if we do not have colorama or if told not to
+        if not colorama or self._no_color:
+            return False
+
+        real_stream = (
+            self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
+            else self.stream.wrapped
+        )
+
+        # If the stream is a tty we should color it
+        if hasattr(real_stream, "isatty") and real_stream.isatty():
+            return True
+
+        # If we have an ANSI term we should color it
+        if os.environ.get("TERM") == "ANSI":
+            return True
+
+        # If anything else we should not color it
+        return False
+
+    def format(self, record):
+        msg = logging.StreamHandler.format(self, record)
+
+        if self.should_color():
+            for level, color in self.COLORS:
+                if record.levelno >= level:
+                    msg = color(msg)
+                    break
+
+        return msg
+
+    # The logging module says handleError() can be customized.
+    def handleError(self, record):
+        exc_class, exc = sys.exc_info()[:2]
+        # If a broken pipe occurred while calling write() or flush() on the
+        # stdout stream in logging's Handler.emit(), then raise our special
+        # exception so we can handle it in main() instead of logging the
+        # broken pipe error and continuing.
+        if (exc_class and self._using_stdout() and
+                _is_broken_pipe_error(exc_class, exc)):
+            raise BrokenStdoutLoggingError()
+
+        return super(ColorizedStreamHandler, self).handleError(record)
+
+
+class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
+
+    def _open(self):
+        ensure_dir(os.path.dirname(self.baseFilename))
+        return logging.handlers.RotatingFileHandler._open(self)
+
+
+class MaxLevelFilter(Filter):
+
+    def __init__(self, level):
+        self.level = level
+
+    def filter(self, record):
+        return record.levelno < self.level
+
+
+class ExcludeLoggerFilter(Filter):
+
+    """
+    A logging Filter that excludes records from a logger (or its children).
+    """
+
+    def filter(self, record):
+        # The base Filter class allows only records from a logger (or its
+        # children).
+        return not super(ExcludeLoggerFilter, self).filter(record)
+
+
+def setup_logging(verbosity, no_color, user_log_file):
+    """Configures and sets up all of the logging
+
+    Returns the requested logging level, as its integer value.
+    """
+
+    # Determine the level to be logging at.
+    if verbosity >= 1:
+        level = "DEBUG"
+    elif verbosity == -1:
+        level = "WARNING"
+    elif verbosity == -2:
+        level = "ERROR"
+    elif verbosity <= -3:
+        level = "CRITICAL"
+    else:
+        level = "INFO"
+
+    level_number = getattr(logging, level)
+
+    # The "root" logger should match the "console" level *unless* we also need
+    # to log to a user log file.
+    include_user_log = user_log_file is not None
+    if include_user_log:
+        additional_log_file = user_log_file
+        root_level = "DEBUG"
+    else:
+        additional_log_file = "/dev/null"
+        root_level = level
+
+    # Disable any logging besides WARNING unless we have DEBUG level logging
+    # enabled for vendored libraries.
+    vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
+
+    # Shorthands for clarity
+    log_streams = {
+        "stdout": "ext://sys.stdout",
+        "stderr": "ext://sys.stderr",
+    }
+    handler_classes = {
+        "stream": "pip._internal.utils.logging.ColorizedStreamHandler",
+        "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
+    }
+    handlers = ["console", "console_errors", "console_subprocess"] + (
+        ["user_log"] if include_user_log else []
+    )
+
+    logging.config.dictConfig({
+        "version": 1,
+        "disable_existing_loggers": False,
+        "filters": {
+            "exclude_warnings": {
+                "()": "pip._internal.utils.logging.MaxLevelFilter",
+                "level": logging.WARNING,
+            },
+            "restrict_to_subprocess": {
+                "()": "logging.Filter",
+                "name": subprocess_logger.name,
+            },
+            "exclude_subprocess": {
+                "()": "pip._internal.utils.logging.ExcludeLoggerFilter",
+                "name": subprocess_logger.name,
+            },
+        },
+        "formatters": {
+            "indent": {
+                "()": IndentingFormatter,
+                "format": "%(message)s",
+            },
+            "indent_with_timestamp": {
+                "()": IndentingFormatter,
+                "format": "%(message)s",
+                "add_timestamp": True,
+            },
+        },
+        "handlers": {
+            "console": {
+                "level": level,
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stdout"],
+                "filters": ["exclude_subprocess", "exclude_warnings"],
+                "formatter": "indent",
+            },
+            "console_errors": {
+                "level": "WARNING",
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stderr"],
+                "filters": ["exclude_subprocess"],
+                "formatter": "indent",
+            },
+            # A handler responsible for logging to the console messages
+            # from the "subprocessor" logger.
+            "console_subprocess": {
+                "level": level,
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stderr"],
+                "filters": ["restrict_to_subprocess"],
+                "formatter": "indent",
+            },
+            "user_log": {
+                "level": "DEBUG",
+                "class": handler_classes["file"],
+                "filename": additional_log_file,
+                "delay": True,
+                "formatter": "indent_with_timestamp",
+            },
+        },
+        "root": {
+            "level": root_level,
+            "handlers": handlers,
+        },
+        "loggers": {
+            "pip._vendor": {
+                "level": vendored_log_level
+            }
+        },
+    })
+
+    return level_number
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/marker_files.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/marker_files.py
new file mode 100644
index 00000000..cb0c8ebc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/marker_files.py
@@ -0,0 +1,20 @@
+import os.path
+
+DELETE_MARKER_MESSAGE = '''\
+This file is placed here by pip to indicate the source was put
+here by pip.
+
+Once this package is successfully installed this source code will be
+deleted (unless you remove this file).
+'''
+PIP_DELETE_MARKER_FILENAME = 'pip-delete-this-directory.txt'
+
+
+def write_delete_marker_file(directory):
+    # type: (str) -> None
+    """
+    Write the pip delete marker file into this directory.
+    """
+    filepath = os.path.join(directory, PIP_DELETE_MARKER_FILENAME)
+    with open(filepath, 'w') as marker_fp:
+        marker_fp.write(DELETE_MARKER_MESSAGE)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/misc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/misc.py
new file mode 100644
index 00000000..abb95979
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/misc.py
@@ -0,0 +1,1204 @@
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import getpass
+import io
+# we have a submodule named 'logging' which would shadow this if we used the
+# regular name:
+import logging as std_logging
+import os
+import posixpath
+import re
+import shutil
+import stat
+import subprocess
+import sys
+import tarfile
+import zipfile
+from collections import deque
+
+from pip._vendor import pkg_resources
+# NOTE: retrying is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import.
+from pip._vendor.retrying import retry  # type: ignore
+from pip._vendor.six import PY2, text_type
+from pip._vendor.six.moves import input, shlex_quote
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+from pip._vendor.six.moves.urllib.parse import unquote as urllib_unquote
+
+from pip import __version__
+from pip._internal.exceptions import CommandError, InstallationError
+from pip._internal.locations import site_packages, user_site
+from pip._internal.utils.compat import (
+    WINDOWS, console_to_str, expanduser, stdlib_pkgs, str_to_display,
+)
+from pip._internal.utils.marker_files import write_delete_marker_file
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import (
+    running_under_virtualenv, virtualenv_no_global,
+)
+
+if PY2:
+    from io import BytesIO as StringIO
+else:
+    from io import StringIO
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, AnyStr, Container, Iterable, List, Mapping, Match, Optional, Text,
+        Union,
+    )
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.models.link import Link
+    from pip._internal.utils.ui import SpinnerInterface
+
+try:
+    from typing import cast, Tuple
+    VersionInfo = Tuple[int, int, int]
+except ImportError:
+    # typing's cast() isn't supported in code comments, so we need to
+    # define a dummy, no-op version.
+    def cast(typ, val):
+        return val
+    VersionInfo = None
+
+
+__all__ = ['rmtree', 'display_path', 'backup_dir',
+           'ask', 'splitext',
+           'format_size', 'is_installable_dir',
+           'is_svn_page', 'file_contents',
+           'split_leading_dir', 'has_leading_dir',
+           'normalize_path',
+           'renames', 'get_prog',
+           'unzip_file', 'untar_file', 'unpack_file', 'call_subprocess',
+           'captured_stdout', 'ensure_dir',
+           'ARCHIVE_EXTENSIONS', 'SUPPORTED_EXTENSIONS', 'WHEEL_EXTENSION',
+           'get_installed_version', 'remove_auth_from_url']
+
+
+logger = std_logging.getLogger(__name__)
+subprocess_logger = std_logging.getLogger('pip.subprocessor')
+
+LOG_DIVIDER = '----------------------------------------'
+
+WHEEL_EXTENSION = '.whl'
+BZ2_EXTENSIONS = ('.tar.bz2', '.tbz')
+XZ_EXTENSIONS = ('.tar.xz', '.txz', '.tlz', '.tar.lz', '.tar.lzma')
+ZIP_EXTENSIONS = ('.zip', WHEEL_EXTENSION)
+TAR_EXTENSIONS = ('.tar.gz', '.tgz', '.tar')
+ARCHIVE_EXTENSIONS = (
+    ZIP_EXTENSIONS + BZ2_EXTENSIONS + TAR_EXTENSIONS + XZ_EXTENSIONS)
+SUPPORTED_EXTENSIONS = ZIP_EXTENSIONS + TAR_EXTENSIONS
+
+try:
+    import bz2  # noqa
+    SUPPORTED_EXTENSIONS += BZ2_EXTENSIONS
+except ImportError:
+    logger.debug('bz2 module is not available')
+
+try:
+    # Only for Python 3.3+
+    import lzma  # noqa
+    SUPPORTED_EXTENSIONS += XZ_EXTENSIONS
+except ImportError:
+    logger.debug('lzma module is not available')
+
+
+def get_pip_version():
+    # type: () -> str
+    pip_pkg_dir = os.path.join(os.path.dirname(__file__), "..", "..")
+    pip_pkg_dir = os.path.abspath(pip_pkg_dir)
+
+    return (
+        'pip {} from {} (python {})'.format(
+            __version__, pip_pkg_dir, sys.version[:3],
+        )
+    )
+
+
+def normalize_version_info(py_version_info):
+    # type: (Tuple[int, ...]) -> Tuple[int, int, int]
+    """
+    Convert a tuple of ints representing a Python version to one of length
+    three.
+
+    :param py_version_info: a tuple of ints representing a Python version,
+        or None to specify no version. The tuple can have any length.
+
+    :return: a tuple of length three if `py_version_info` is non-None.
+        Otherwise, return `py_version_info` unchanged (i.e. None).
+    """
+    if len(py_version_info) < 3:
+        py_version_info += (3 - len(py_version_info)) * (0,)
+    elif len(py_version_info) > 3:
+        py_version_info = py_version_info[:3]
+
+    return cast(VersionInfo, py_version_info)
+
+
+def ensure_dir(path):
+    # type: (AnyStr) -> None
+    """os.path.makedirs without EEXIST."""
+    try:
+        os.makedirs(path)
+    except OSError as e:
+        if e.errno != errno.EEXIST:
+            raise
+
+
+def get_prog():
+    # type: () -> str
+    try:
+        prog = os.path.basename(sys.argv[0])
+        if prog in ('__main__.py', '-c'):
+            return "%s -m pip" % sys.executable
+        else:
+            return prog
+    except (AttributeError, TypeError, IndexError):
+        pass
+    return 'pip'
+
+
+# Retry every half second for up to 3 seconds
+@retry(stop_max_delay=3000, wait_fixed=500)
+def rmtree(dir, ignore_errors=False):
+    # type: (str, bool) -> None
+    shutil.rmtree(dir, ignore_errors=ignore_errors,
+                  onerror=rmtree_errorhandler)
+
+
+def rmtree_errorhandler(func, path, exc_info):
+    """On Windows, the files in .svn are read-only, so when rmtree() tries to
+    remove them, an exception is thrown.  We catch that here, remove the
+    read-only attribute, and hopefully continue without problems."""
+    # if file type currently read only
+    if os.stat(path).st_mode & stat.S_IREAD:
+        # convert to read/write
+        os.chmod(path, stat.S_IWRITE)
+        # use the original function to repeat the operation
+        func(path)
+        return
+    else:
+        raise
+
+
+def path_to_display(path):
+    # type: (Optional[Union[str, Text]]) -> Optional[Text]
+    """
+    Convert a bytes (or text) path to text (unicode in Python 2) for display
+    and logging purposes.
+
+    This function should never error out. Also, this function is mainly needed
+    for Python 2 since in Python 3 str paths are already text.
+    """
+    if path is None:
+        return None
+    if isinstance(path, text_type):
+        return path
+    # Otherwise, path is a bytes object (str in Python 2).
+    try:
+        display_path = path.decode(sys.getfilesystemencoding(), 'strict')
+    except UnicodeDecodeError:
+        # Include the full bytes to make troubleshooting easier, even though
+        # it may not be very human readable.
+        if PY2:
+            # Convert the bytes to a readable str representation using
+            # repr(), and then convert the str to unicode.
+            #   Also, we add the prefix "b" to the repr() return value both
+            # to make the Python 2 output look like the Python 3 output, and
+            # to signal to the user that this is a bytes representation.
+            display_path = str_to_display('b{!r}'.format(path))
+        else:
+            # Silence the "F821 undefined name 'ascii'" flake8 error since
+            # in Python 3 ascii() is a built-in.
+            display_path = ascii(path)  # noqa: F821
+
+    return display_path
+
+
+def display_path(path):
+    # type: (Union[str, Text]) -> str
+    """Gives the display value for a given path, making it relative to cwd
+    if possible."""
+    path = os.path.normcase(os.path.abspath(path))
+    if sys.version_info[0] == 2:
+        path = path.decode(sys.getfilesystemencoding(), 'replace')
+        path = path.encode(sys.getdefaultencoding(), 'replace')
+    if path.startswith(os.getcwd() + os.path.sep):
+        path = '.' + path[len(os.getcwd()):]
+    return path
+
+
+def backup_dir(dir, ext='.bak'):
+    # type: (str, str) -> str
+    """Figure out the name of a directory to back up the given dir to
+    (adding .bak, .bak2, etc)"""
+    n = 1
+    extension = ext
+    while os.path.exists(dir + extension):
+        n += 1
+        extension = ext + str(n)
+    return dir + extension
+
+
+def ask_path_exists(message, options):
+    # type: (str, Iterable[str]) -> str
+    for action in os.environ.get('PIP_EXISTS_ACTION', '').split():
+        if action in options:
+            return action
+    return ask(message, options)
+
+
+def _check_no_input(message):
+    # type: (str) -> None
+    """Raise an error if no input is allowed."""
+    if os.environ.get('PIP_NO_INPUT'):
+        raise Exception(
+            'No input was expected ($PIP_NO_INPUT set); question: %s' %
+            message
+        )
+
+
+def ask(message, options):
+    # type: (str, Iterable[str]) -> str
+    """Ask the message interactively, with the given possible responses"""
+    while 1:
+        _check_no_input(message)
+        response = input(message)
+        response = response.strip().lower()
+        if response not in options:
+            print(
+                'Your response (%r) was not one of the expected responses: '
+                '%s' % (response, ', '.join(options))
+            )
+        else:
+            return response
+
+
+def ask_input(message):
+    # type: (str) -> str
+    """Ask for input interactively."""
+    _check_no_input(message)
+    return input(message)
+
+
+def ask_password(message):
+    # type: (str) -> str
+    """Ask for a password interactively."""
+    _check_no_input(message)
+    return getpass.getpass(message)
+
+
+def format_size(bytes):
+    # type: (float) -> str
+    if bytes > 1000 * 1000:
+        return '%.1fMB' % (bytes / 1000.0 / 1000)
+    elif bytes > 10 * 1000:
+        return '%ikB' % (bytes / 1000)
+    elif bytes > 1000:
+        return '%.1fkB' % (bytes / 1000.0)
+    else:
+        return '%ibytes' % bytes
+
+
+def is_installable_dir(path):
+    # type: (str) -> bool
+    """Is path is a directory containing setup.py or pyproject.toml?
+    """
+    if not os.path.isdir(path):
+        return False
+    setup_py = os.path.join(path, 'setup.py')
+    if os.path.isfile(setup_py):
+        return True
+    pyproject_toml = os.path.join(path, 'pyproject.toml')
+    if os.path.isfile(pyproject_toml):
+        return True
+    return False
+
+
+def is_svn_page(html):
+    # type: (Union[str, Text]) -> Optional[Match[Union[str, Text]]]
+    """
+    Returns true if the page appears to be the index page of an svn repository
+    """
+    return (re.search(r'<title>[^<]*Revision \d+:', html) and
+            re.search(r'Powered by (?:<a[^>]*?>)?Subversion', html, re.I))
+
+
+def file_contents(filename):
+    # type: (str) -> Text
+    with open(filename, 'rb') as fp:
+        return fp.read().decode('utf-8')
+
+
+def read_chunks(file, size=io.DEFAULT_BUFFER_SIZE):
+    """Yield pieces of data from a file-like object until EOF."""
+    while True:
+        chunk = file.read(size)
+        if not chunk:
+            break
+        yield chunk
+
+
+def split_leading_dir(path):
+    # type: (Union[str, Text]) -> List[Union[str, Text]]
+    path = path.lstrip('/').lstrip('\\')
+    if '/' in path and (('\\' in path and path.find('/') < path.find('\\')) or
+                        '\\' not in path):
+        return path.split('/', 1)
+    elif '\\' in path:
+        return path.split('\\', 1)
+    else:
+        return [path, '']
+
+
+def has_leading_dir(paths):
+    # type: (Iterable[Union[str, Text]]) -> bool
+    """Returns true if all the paths have the same leading path name
+    (i.e., everything is in one subdirectory in an archive)"""
+    common_prefix = None
+    for path in paths:
+        prefix, rest = split_leading_dir(path)
+        if not prefix:
+            return False
+        elif common_prefix is None:
+            common_prefix = prefix
+        elif prefix != common_prefix:
+            return False
+    return True
+
+
+def normalize_path(path, resolve_symlinks=True):
+    # type: (str, bool) -> str
+    """
+    Convert a path to its canonical, case-normalized, absolute version.
+
+    """
+    path = expanduser(path)
+    if resolve_symlinks:
+        path = os.path.realpath(path)
+    else:
+        path = os.path.abspath(path)
+    return os.path.normcase(path)
+
+
+def splitext(path):
+    # type: (str) -> Tuple[str, str]
+    """Like os.path.splitext, but take off .tar too"""
+    base, ext = posixpath.splitext(path)
+    if base.lower().endswith('.tar'):
+        ext = base[-4:] + ext
+        base = base[:-4]
+    return base, ext
+
+
+def renames(old, new):
+    # type: (str, str) -> None
+    """Like os.renames(), but handles renaming across devices."""
+    # Implementation borrowed from os.renames().
+    head, tail = os.path.split(new)
+    if head and tail and not os.path.exists(head):
+        os.makedirs(head)
+
+    shutil.move(old, new)
+
+    head, tail = os.path.split(old)
+    if head and tail:
+        try:
+            os.removedirs(head)
+        except OSError:
+            pass
+
+
+def is_local(path):
+    # type: (str) -> bool
+    """
+    Return True if path is within sys.prefix, if we're running in a virtualenv.
+
+    If we're not in a virtualenv, all paths are considered "local."
+
+    """
+    if not running_under_virtualenv():
+        return True
+    return normalize_path(path).startswith(normalize_path(sys.prefix))
+
+
+def dist_is_local(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution object is installed locally
+    (i.e. within current virtualenv).
+
+    Always True if we're not in a virtualenv.
+
+    """
+    return is_local(dist_location(dist))
+
+
+def dist_in_usersite(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is installed in user site.
+    """
+    norm_path = normalize_path(dist_location(dist))
+    return norm_path.startswith(normalize_path(user_site))
+
+
+def dist_in_site_packages(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is installed in
+    sysconfig.get_python_lib().
+    """
+    return normalize_path(
+        dist_location(dist)
+    ).startswith(normalize_path(site_packages))
+
+
+def dist_is_editable(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is an editable install.
+    """
+    for path_item in sys.path:
+        egg_link = os.path.join(path_item, dist.project_name + '.egg-link')
+        if os.path.isfile(egg_link):
+            return True
+    return False
+
+
+def get_installed_distributions(
+        local_only=True,  # type: bool
+        skip=stdlib_pkgs,  # type: Container[str]
+        include_editables=True,  # type: bool
+        editables_only=False,  # type: bool
+        user_only=False,  # type: bool
+        paths=None  # type: Optional[List[str]]
+):
+    # type: (...) -> List[Distribution]
+    """
+    Return a list of installed Distribution objects.
+
+    If ``local_only`` is True (default), only return installations
+    local to the current virtualenv, if in a virtualenv.
+
+    ``skip`` argument is an iterable of lower-case project names to
+    ignore; defaults to stdlib_pkgs
+
+    If ``include_editables`` is False, don't report editables.
+
+    If ``editables_only`` is True , only report editables.
+
+    If ``user_only`` is True , only report installations in the user
+    site directory.
+
+    If ``paths`` is set, only report the distributions present at the
+    specified list of locations.
+    """
+    if paths:
+        working_set = pkg_resources.WorkingSet(paths)
+    else:
+        working_set = pkg_resources.working_set
+
+    if local_only:
+        local_test = dist_is_local
+    else:
+        def local_test(d):
+            return True
+
+    if include_editables:
+        def editable_test(d):
+            return True
+    else:
+        def editable_test(d):
+            return not dist_is_editable(d)
+
+    if editables_only:
+        def editables_only_test(d):
+            return dist_is_editable(d)
+    else:
+        def editables_only_test(d):
+            return True
+
+    if user_only:
+        user_test = dist_in_usersite
+    else:
+        def user_test(d):
+            return True
+
+    # because of pkg_resources vendoring, mypy cannot find stub in typeshed
+    return [d for d in working_set  # type: ignore
+            if local_test(d) and
+            d.key not in skip and
+            editable_test(d) and
+            editables_only_test(d) and
+            user_test(d)
+            ]
+
+
+def egg_link_path(dist):
+    # type: (Distribution) -> Optional[str]
+    """
+    Return the path for the .egg-link file if it exists, otherwise, None.
+
+    There's 3 scenarios:
+    1) not in a virtualenv
+       try to find in site.USER_SITE, then site_packages
+    2) in a no-global virtualenv
+       try to find in site_packages
+    3) in a yes-global virtualenv
+       try to find in site_packages, then site.USER_SITE
+       (don't look in global location)
+
+    For #1 and #3, there could be odd cases, where there's an egg-link in 2
+    locations.
+
+    This method will just return the first one found.
+    """
+    sites = []
+    if running_under_virtualenv():
+        if virtualenv_no_global():
+            sites.append(site_packages)
+        else:
+            sites.append(site_packages)
+            if user_site:
+                sites.append(user_site)
+    else:
+        if user_site:
+            sites.append(user_site)
+        sites.append(site_packages)
+
+    for site in sites:
+        egglink = os.path.join(site, dist.project_name) + '.egg-link'
+        if os.path.isfile(egglink):
+            return egglink
+    return None
+
+
+def dist_location(dist):
+    # type: (Distribution) -> str
+    """
+    Get the site-packages location of this distribution. Generally
+    this is dist.location, except in the case of develop-installed
+    packages, where dist.location is the source code location, and we
+    want to know where the egg-link file is.
+
+    """
+    egg_link = egg_link_path(dist)
+    if egg_link:
+        return egg_link
+    return dist.location
+
+
+def current_umask():
+    """Get the current umask which involves having to set it temporarily."""
+    mask = os.umask(0)
+    os.umask(mask)
+    return mask
+
+
+def unzip_file(filename, location, flatten=True):
+    # type: (str, str, bool) -> None
+    """
+    Unzip the file (with path `filename`) to the destination `location`.  All
+    files are written based on system defaults and umask (i.e. permissions are
+    not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written. Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    zipfp = open(filename, 'rb')
+    try:
+        zip = zipfile.ZipFile(zipfp, allowZip64=True)
+        leading = has_leading_dir(zip.namelist()) and flatten
+        for info in zip.infolist():
+            name = info.filename
+            fn = name
+            if leading:
+                fn = split_leading_dir(name)[1]
+            fn = os.path.join(location, fn)
+            dir = os.path.dirname(fn)
+            if fn.endswith('/') or fn.endswith('\\'):
+                # A directory
+                ensure_dir(fn)
+            else:
+                ensure_dir(dir)
+                # Don't use read() to avoid allocating an arbitrarily large
+                # chunk of memory for the file's content
+                fp = zip.open(name)
+                try:
+                    with open(fn, 'wb') as destfp:
+                        shutil.copyfileobj(fp, destfp)
+                finally:
+                    fp.close()
+                    mode = info.external_attr >> 16
+                    # if mode and regular file and any execute permissions for
+                    # user/group/world?
+                    if mode and stat.S_ISREG(mode) and mode & 0o111:
+                        # make dest file have execute for user/group/world
+                        # (chmod +x) no-op on windows per python docs
+                        os.chmod(fn, (0o777 - current_umask() | 0o111))
+    finally:
+        zipfp.close()
+
+
+def untar_file(filename, location):
+    # type: (str, str) -> None
+    """
+    Untar the file (with path `filename`) to the destination `location`.
+    All files are written based on system defaults and umask (i.e. permissions
+    are not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written.  Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    if filename.lower().endswith('.gz') or filename.lower().endswith('.tgz'):
+        mode = 'r:gz'
+    elif filename.lower().endswith(BZ2_EXTENSIONS):
+        mode = 'r:bz2'
+    elif filename.lower().endswith(XZ_EXTENSIONS):
+        mode = 'r:xz'
+    elif filename.lower().endswith('.tar'):
+        mode = 'r'
+    else:
+        logger.warning(
+            'Cannot determine compression type for file %s', filename,
+        )
+        mode = 'r:*'
+    tar = tarfile.open(filename, mode)
+    try:
+        leading = has_leading_dir([
+            member.name for member in tar.getmembers()
+        ])
+        for member in tar.getmembers():
+            fn = member.name
+            if leading:
+                # https://github.com/python/mypy/issues/1174
+                fn = split_leading_dir(fn)[1]  # type: ignore
+            path = os.path.join(location, fn)
+            if member.isdir():
+                ensure_dir(path)
+            elif member.issym():
+                try:
+                    # https://github.com/python/typeshed/issues/2673
+                    tar._extract_member(member, path)  # type: ignore
+                except Exception as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        'In the tar file %s the member %s is invalid: %s',
+                        filename, member.name, exc,
+                    )
+                    continue
+            else:
+                try:
+                    fp = tar.extractfile(member)
+                except (KeyError, AttributeError) as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        'In the tar file %s the member %s is invalid: %s',
+                        filename, member.name, exc,
+                    )
+                    continue
+                ensure_dir(os.path.dirname(path))
+                with open(path, 'wb') as destfp:
+                    shutil.copyfileobj(fp, destfp)
+                fp.close()
+                # Update the timestamp (useful for cython compiled files)
+                # https://github.com/python/typeshed/issues/2673
+                tar.utime(member, path)  # type: ignore
+                # member have any execute permissions for user/group/world?
+                if member.mode & 0o111:
+                    # make dest file have execute for user/group/world
+                    # no-op on windows per python docs
+                    os.chmod(path, (0o777 - current_umask() | 0o111))
+    finally:
+        tar.close()
+
+
+def unpack_file(
+    filename,  # type: str
+    location,  # type: str
+    content_type,  # type: Optional[str]
+    link  # type: Optional[Link]
+):
+    # type: (...) -> None
+    filename = os.path.realpath(filename)
+    if (content_type == 'application/zip' or
+            filename.lower().endswith(ZIP_EXTENSIONS) or
+            zipfile.is_zipfile(filename)):
+        unzip_file(
+            filename,
+            location,
+            flatten=not filename.endswith('.whl')
+        )
+    elif (content_type == 'application/x-gzip' or
+            tarfile.is_tarfile(filename) or
+            filename.lower().endswith(
+                TAR_EXTENSIONS + BZ2_EXTENSIONS + XZ_EXTENSIONS)):
+        untar_file(filename, location)
+    elif (content_type and content_type.startswith('text/html') and
+            is_svn_page(file_contents(filename))):
+        # We don't really care about this
+        from pip._internal.vcs.subversion import Subversion
+        url = 'svn+' + link.url
+        Subversion().unpack(location, url=url)
+    else:
+        # FIXME: handle?
+        # FIXME: magic signatures?
+        logger.critical(
+            'Cannot unpack file %s (downloaded from %s, content-type: %s); '
+            'cannot detect archive format',
+            filename, location, content_type,
+        )
+        raise InstallationError(
+            'Cannot determine archive format of %s' % location
+        )
+
+
+def format_command_args(args):
+    # type: (List[str]) -> str
+    """
+    Format command arguments for display.
+    """
+    return ' '.join(shlex_quote(arg) for arg in args)
+
+
+def make_subprocess_output_error(
+    cmd_args,     # type: List[str]
+    cwd,          # type: Optional[str]
+    lines,        # type: List[Text]
+    exit_status,  # type: int
+):
+    # type: (...) -> Text
+    """
+    Create and return the error message to use to log a subprocess error
+    with command output.
+
+    :param lines: A list of lines, each ending with a newline.
+    """
+    command = format_command_args(cmd_args)
+    # Convert `command` and `cwd` to text (unicode in Python 2) so we can use
+    # them as arguments in the unicode format string below. This avoids
+    # "UnicodeDecodeError: 'ascii' codec can't decode byte ..." in Python 2
+    # if either contains a non-ascii character.
+    command_display = str_to_display(command, desc='command bytes')
+    cwd_display = path_to_display(cwd)
+
+    # We know the joined output value ends in a newline.
+    output = ''.join(lines)
+    msg = (
+        # Use a unicode string to avoid "UnicodeEncodeError: 'ascii'
+        # codec can't encode character ..." in Python 2 when a format
+        # argument (e.g. `output`) has a non-ascii character.
+        u'Command errored out with exit status {exit_status}:\n'
+        ' command: {command_display}\n'
+        '     cwd: {cwd_display}\n'
+        'Complete output ({line_count} lines):\n{output}{divider}'
+    ).format(
+        exit_status=exit_status,
+        command_display=command_display,
+        cwd_display=cwd_display,
+        line_count=len(lines),
+        output=output,
+        divider=LOG_DIVIDER,
+    )
+    return msg
+
+
+def call_subprocess(
+    cmd,  # type: List[str]
+    show_stdout=False,  # type: bool
+    cwd=None,  # type: Optional[str]
+    on_returncode='raise',  # type: str
+    extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
+    command_desc=None,  # type: Optional[str]
+    extra_environ=None,  # type: Optional[Mapping[str, Any]]
+    unset_environ=None,  # type: Optional[Iterable[str]]
+    spinner=None  # type: Optional[SpinnerInterface]
+):
+    # type: (...) -> Text
+    """
+    Args:
+      show_stdout: if true, use INFO to log the subprocess's stderr and
+        stdout streams.  Otherwise, use DEBUG.  Defaults to False.
+      extra_ok_returncodes: an iterable of integer return codes that are
+        acceptable, in addition to 0. Defaults to None, which means [].
+      unset_environ: an iterable of environment variable names to unset
+        prior to calling subprocess.Popen().
+    """
+    if extra_ok_returncodes is None:
+        extra_ok_returncodes = []
+    if unset_environ is None:
+        unset_environ = []
+    # Most places in pip use show_stdout=False. What this means is--
+    #
+    # - We connect the child's output (combined stderr and stdout) to a
+    #   single pipe, which we read.
+    # - We log this output to stderr at DEBUG level as it is received.
+    # - If DEBUG logging isn't enabled (e.g. if --verbose logging wasn't
+    #   requested), then we show a spinner so the user can still see the
+    #   subprocess is in progress.
+    # - If the subprocess exits with an error, we log the output to stderr
+    #   at ERROR level if it hasn't already been displayed to the console
+    #   (e.g. if --verbose logging wasn't enabled).  This way we don't log
+    #   the output to the console twice.
+    #
+    # If show_stdout=True, then the above is still done, but with DEBUG
+    # replaced by INFO.
+    if show_stdout:
+        # Then log the subprocess output at INFO level.
+        log_subprocess = subprocess_logger.info
+        used_level = std_logging.INFO
+    else:
+        # Then log the subprocess output using DEBUG.  This also ensures
+        # it will be logged to the log file (aka user_log), if enabled.
+        log_subprocess = subprocess_logger.debug
+        used_level = std_logging.DEBUG
+
+    # Whether the subprocess will be visible in the console.
+    showing_subprocess = subprocess_logger.getEffectiveLevel() <= used_level
+
+    # Only use the spinner if we're not showing the subprocess output
+    # and we have a spinner.
+    use_spinner = not showing_subprocess and spinner is not None
+
+    if command_desc is None:
+        command_desc = format_command_args(cmd)
+
+    log_subprocess("Running command %s", command_desc)
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+    for name in unset_environ:
+        env.pop(name, None)
+    try:
+        proc = subprocess.Popen(
+            cmd, stderr=subprocess.STDOUT, stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE, cwd=cwd, env=env,
+        )
+        proc.stdin.close()
+    except Exception as exc:
+        subprocess_logger.critical(
+            "Error %s while executing command %s", exc, command_desc,
+        )
+        raise
+    all_output = []
+    while True:
+        # The "line" value is a unicode string in Python 2.
+        line = console_to_str(proc.stdout.readline())
+        if not line:
+            break
+        line = line.rstrip()
+        all_output.append(line + '\n')
+
+        # Show the line immediately.
+        log_subprocess(line)
+        # Update the spinner.
+        if use_spinner:
+            spinner.spin()
+    try:
+        proc.wait()
+    finally:
+        if proc.stdout:
+            proc.stdout.close()
+    proc_had_error = (
+        proc.returncode and proc.returncode not in extra_ok_returncodes
+    )
+    if use_spinner:
+        if proc_had_error:
+            spinner.finish("error")
+        else:
+            spinner.finish("done")
+    if proc_had_error:
+        if on_returncode == 'raise':
+            if not showing_subprocess:
+                # Then the subprocess streams haven't been logged to the
+                # console yet.
+                msg = make_subprocess_output_error(
+                    cmd_args=cmd,
+                    cwd=cwd,
+                    lines=all_output,
+                    exit_status=proc.returncode,
+                )
+                subprocess_logger.error(msg)
+            exc_msg = (
+                'Command errored out with exit status {}: {} '
+                'Check the logs for full command output.'
+            ).format(proc.returncode, command_desc)
+            raise InstallationError(exc_msg)
+        elif on_returncode == 'warn':
+            subprocess_logger.warning(
+                'Command "%s" had error code %s in %s',
+                command_desc, proc.returncode, cwd,
+            )
+        elif on_returncode == 'ignore':
+            pass
+        else:
+            raise ValueError('Invalid value: on_returncode=%s' %
+                             repr(on_returncode))
+    return ''.join(all_output)
+
+
+def _make_build_dir(build_dir):
+    os.makedirs(build_dir)
+    write_delete_marker_file(build_dir)
+
+
+class FakeFile(object):
+    """Wrap a list of lines in an object with readline() to make
+    ConfigParser happy."""
+    def __init__(self, lines):
+        self._gen = (l for l in lines)
+
+    def readline(self):
+        try:
+            try:
+                return next(self._gen)
+            except NameError:
+                return self._gen.next()
+        except StopIteration:
+            return ''
+
+    def __iter__(self):
+        return self._gen
+
+
+class StreamWrapper(StringIO):
+
+    @classmethod
+    def from_stream(cls, orig_stream):
+        cls.orig_stream = orig_stream
+        return cls()
+
+    # compileall.compile_dir() needs stdout.encoding to print to stdout
+    @property
+    def encoding(self):
+        return self.orig_stream.encoding
+
+
+@contextlib.contextmanager
+def captured_output(stream_name):
+    """Return a context manager used by captured_stdout/stdin/stderr
+    that temporarily replaces the sys stream *stream_name* with a StringIO.
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    orig_stdout = getattr(sys, stream_name)
+    setattr(sys, stream_name, StreamWrapper.from_stream(orig_stdout))
+    try:
+        yield getattr(sys, stream_name)
+    finally:
+        setattr(sys, stream_name, orig_stdout)
+
+
+def captured_stdout():
+    """Capture the output of sys.stdout:
+
+       with captured_stdout() as stdout:
+           print('hello')
+       self.assertEqual(stdout.getvalue(), 'hello\n')
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    return captured_output('stdout')
+
+
+def captured_stderr():
+    """
+    See captured_stdout().
+    """
+    return captured_output('stderr')
+
+
+class cached_property(object):
+    """A property that is only computed once per instance and then replaces
+       itself with an ordinary attribute. Deleting the attribute resets the
+       property.
+
+       Source: https://github.com/bottlepy/bottle/blob/0.11.5/bottle.py#L175
+    """
+
+    def __init__(self, func):
+        self.__doc__ = getattr(func, '__doc__')
+        self.func = func
+
+    def __get__(self, obj, cls):
+        if obj is None:
+            # We're being accessed from the class itself, not from an object
+            return self
+        value = obj.__dict__[self.func.__name__] = self.func(obj)
+        return value
+
+
+def get_installed_version(dist_name, working_set=None):
+    """Get the installed version of dist_name avoiding pkg_resources cache"""
+    # Create a requirement that we'll look for inside of setuptools.
+    req = pkg_resources.Requirement.parse(dist_name)
+
+    if working_set is None:
+        # We want to avoid having this cached, so we need to construct a new
+        # working set each time.
+        working_set = pkg_resources.WorkingSet()
+
+    # Get the installed distribution from our working set
+    dist = working_set.find(req)
+
+    # Check to see if we got an installed distribution or not, if we did
+    # we want to return it's version.
+    return dist.version if dist else None
+
+
+def consume(iterator):
+    """Consume an iterable at C speed."""
+    deque(iterator, maxlen=0)
+
+
+# Simulates an enum
+def enum(*sequential, **named):
+    enums = dict(zip(sequential, range(len(sequential))), **named)
+    reverse = {value: key for key, value in enums.items()}
+    enums['reverse_mapping'] = reverse
+    return type('Enum', (), enums)
+
+
+def path_to_url(path):
+    # type: (Union[str, Text]) -> str
+    """
+    Convert a path to a file: URL.  The path will be made absolute and have
+    quoted path parts.
+    """
+    path = os.path.normpath(os.path.abspath(path))
+    url = urllib_parse.urljoin('file:', urllib_request.pathname2url(path))
+    return url
+
+
+def split_auth_from_netloc(netloc):
+    """
+    Parse out and remove the auth information from a netloc.
+
+    Returns: (netloc, (username, password)).
+    """
+    if '@' not in netloc:
+        return netloc, (None, None)
+
+    # Split from the right because that's how urllib.parse.urlsplit()
+    # behaves if more than one @ is present (which can be checked using
+    # the password attribute of urlsplit()'s return value).
+    auth, netloc = netloc.rsplit('@', 1)
+    if ':' in auth:
+        # Split from the left because that's how urllib.parse.urlsplit()
+        # behaves if more than one : is present (which again can be checked
+        # using the password attribute of the return value)
+        user_pass = auth.split(':', 1)
+    else:
+        user_pass = auth, None
+
+    user_pass = tuple(
+        None if x is None else urllib_unquote(x) for x in user_pass
+    )
+
+    return netloc, user_pass
+
+
+def redact_netloc(netloc):
+    # type: (str) -> str
+    """
+    Replace the password in a netloc with "****", if it exists.
+
+    For example, "user:pass@example.com" returns "user:****@example.com".
+    """
+    netloc, (user, password) = split_auth_from_netloc(netloc)
+    if user is None:
+        return netloc
+    password = '' if password is None else ':****'
+    return '{user}{password}@{netloc}'.format(user=urllib_parse.quote(user),
+                                              password=password,
+                                              netloc=netloc)
+
+
+def _transform_url(url, transform_netloc):
+    """Transform and replace netloc in a url.
+
+    transform_netloc is a function taking the netloc and returning a
+    tuple. The first element of this tuple is the new netloc. The
+    entire tuple is returned.
+
+    Returns a tuple containing the transformed url as item 0 and the
+    original tuple returned by transform_netloc as item 1.
+    """
+    purl = urllib_parse.urlsplit(url)
+    netloc_tuple = transform_netloc(purl.netloc)
+    # stripped url
+    url_pieces = (
+        purl.scheme, netloc_tuple[0], purl.path, purl.query, purl.fragment
+    )
+    surl = urllib_parse.urlunsplit(url_pieces)
+    return surl, netloc_tuple
+
+
+def _get_netloc(netloc):
+    return split_auth_from_netloc(netloc)
+
+
+def _redact_netloc(netloc):
+    return (redact_netloc(netloc),)
+
+
+def split_auth_netloc_from_url(url):
+    # type: (str) -> Tuple[str, str, Tuple[str, str]]
+    """
+    Parse a url into separate netloc, auth, and url with no auth.
+
+    Returns: (url_without_auth, netloc, (username, password))
+    """
+    url_without_auth, (netloc, auth) = _transform_url(url, _get_netloc)
+    return url_without_auth, netloc, auth
+
+
+def remove_auth_from_url(url):
+    # type: (str) -> str
+    """Return a copy of url with 'username:password@' removed."""
+    # username/pass params are passed to subversion through flags
+    # and are not recognized in the url.
+    return _transform_url(url, _get_netloc)[0]
+
+
+def redact_password_from_url(url):
+    # type: (str) -> str
+    """Replace the password in a given url with ****."""
+    return _transform_url(url, _redact_netloc)[0]
+
+
+def protect_pip_from_modification_on_windows(modifying_pip):
+    """Protection of pip.exe from modification on Windows
+
+    On Windows, any operation modifying pip should be run as:
+        python -m pip ...
+    """
+    pip_names = [
+        "pip.exe",
+        "pip{}.exe".format(sys.version_info[0]),
+        "pip{}.{}.exe".format(*sys.version_info[:2])
+    ]
+
+    # See https://github.com/pypa/pip/issues/1299 for more discussion
+    should_show_use_python_msg = (
+        modifying_pip and
+        WINDOWS and
+        os.path.basename(sys.argv[0]) in pip_names
+    )
+
+    if should_show_use_python_msg:
+        new_command = [
+            sys.executable, "-m", "pip"
+        ] + sys.argv[1:]
+        raise CommandError(
+            'To modify pip, please run the following command:\n{}'
+            .format(" ".join(new_command))
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/models.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/models.py
new file mode 100644
index 00000000..fccaf5dd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/models.py
@@ -0,0 +1,40 @@
+"""Utilities for defining models
+"""
+
+import operator
+
+
+class KeyBasedCompareMixin(object):
+    """Provides comparison capabilities that is based on a key
+    """
+
+    def __init__(self, key, defining_class):
+        self._compare_key = key
+        self._defining_class = defining_class
+
+    def __hash__(self):
+        return hash(self._compare_key)
+
+    def __lt__(self, other):
+        return self._compare(other, operator.__lt__)
+
+    def __le__(self, other):
+        return self._compare(other, operator.__le__)
+
+    def __gt__(self, other):
+        return self._compare(other, operator.__gt__)
+
+    def __ge__(self, other):
+        return self._compare(other, operator.__ge__)
+
+    def __eq__(self, other):
+        return self._compare(other, operator.__eq__)
+
+    def __ne__(self, other):
+        return self._compare(other, operator.__ne__)
+
+    def _compare(self, other, method):
+        if not isinstance(other, self._defining_class):
+            return NotImplemented
+
+        return method(self._compare_key, other._compare_key)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/outdated.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/outdated.py
new file mode 100644
index 00000000..2b10aeff
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/outdated.py
@@ -0,0 +1,178 @@
+from __future__ import absolute_import
+
+import datetime
+import json
+import logging
+import os.path
+import sys
+
+from pip._vendor import lockfile, pkg_resources
+from pip._vendor.packaging import version as packaging_version
+
+from pip._internal.cli.cmdoptions import make_search_scope
+from pip._internal.index import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.misc import ensure_dir, get_installed_version
+from pip._internal.utils.packaging import get_installer
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    import optparse
+    from typing import Any, Dict
+    from pip._internal.download import PipSession
+
+
+SELFCHECK_DATE_FMT = "%Y-%m-%dT%H:%M:%SZ"
+
+
+logger = logging.getLogger(__name__)
+
+
+class SelfCheckState(object):
+    def __init__(self, cache_dir):
+        # type: (str) -> None
+        self.state = {}  # type: Dict[str, Any]
+        self.statefile_path = None
+
+        # Try to load the existing state
+        if cache_dir:
+            self.statefile_path = os.path.join(cache_dir, "selfcheck.json")
+            try:
+                with open(self.statefile_path) as statefile:
+                    self.state = json.load(statefile)[sys.prefix]
+            except (IOError, ValueError, KeyError):
+                # Explicitly suppressing exceptions, since we don't want to
+                # error out if the cache file is invalid.
+                pass
+
+    def save(self, pypi_version, current_time):
+        # type: (str, datetime.datetime) -> None
+        # If we do not have a path to cache in, don't bother saving.
+        if not self.statefile_path:
+            return
+
+        # Check to make sure that we own the directory
+        if not check_path_owner(os.path.dirname(self.statefile_path)):
+            return
+
+        # Now that we've ensured the directory is owned by this user, we'll go
+        # ahead and make sure that all our directories are created.
+        ensure_dir(os.path.dirname(self.statefile_path))
+
+        # Attempt to write out our version check file
+        with lockfile.LockFile(self.statefile_path):
+            if os.path.exists(self.statefile_path):
+                with open(self.statefile_path) as statefile:
+                    state = json.load(statefile)
+            else:
+                state = {}
+
+            state[sys.prefix] = {
+                "last_check": current_time.strftime(SELFCHECK_DATE_FMT),
+                "pypi_version": pypi_version,
+            }
+
+            with open(self.statefile_path, "w") as statefile:
+                json.dump(state, statefile, sort_keys=True,
+                          separators=(",", ":"))
+
+
+def was_installed_by_pip(pkg):
+    # type: (str) -> bool
+    """Checks whether pkg was installed by pip
+
+    This is used not to display the upgrade message when pip is in fact
+    installed by system package manager, such as dnf on Fedora.
+    """
+    try:
+        dist = pkg_resources.get_distribution(pkg)
+        return "pip" == get_installer(dist)
+    except pkg_resources.DistributionNotFound:
+        return False
+
+
+def pip_version_check(session, options):
+    # type: (PipSession, optparse.Values) -> None
+    """Check for an update for pip.
+
+    Limit the frequency of checks to once per week. State is stored either in
+    the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
+    of the pip script path.
+    """
+    installed_version = get_installed_version("pip")
+    if not installed_version:
+        return
+
+    pip_version = packaging_version.parse(installed_version)
+    pypi_version = None
+
+    try:
+        state = SelfCheckState(cache_dir=options.cache_dir)
+
+        current_time = datetime.datetime.utcnow()
+        # Determine if we need to refresh the state
+        if "last_check" in state.state and "pypi_version" in state.state:
+            last_check = datetime.datetime.strptime(
+                state.state["last_check"],
+                SELFCHECK_DATE_FMT
+            )
+            if (current_time - last_check).total_seconds() < 7 * 24 * 60 * 60:
+                pypi_version = state.state["pypi_version"]
+
+        # Refresh the version if we need to or just see if we need to warn
+        if pypi_version is None:
+            # Lets use PackageFinder to see what the latest pip version is
+            search_scope = make_search_scope(options, suppress_no_index=True)
+
+            # Pass allow_yanked=False so we don't suggest upgrading to a
+            # yanked version.
+            selection_prefs = SelectionPreferences(
+                allow_yanked=False,
+                allow_all_prereleases=False,  # Explicitly set to False
+            )
+
+            finder = PackageFinder.create(
+                search_scope=search_scope,
+                selection_prefs=selection_prefs,
+                trusted_hosts=options.trusted_hosts,
+                session=session,
+            )
+            candidate = finder.find_candidates("pip").get_best()
+            if candidate is None:
+                return
+            pypi_version = str(candidate.version)
+
+            # save that we've performed a check
+            state.save(pypi_version, current_time)
+
+        remote_version = packaging_version.parse(pypi_version)
+
+        local_version_is_older = (
+            pip_version < remote_version and
+            pip_version.base_version != remote_version.base_version and
+            was_installed_by_pip('pip')
+        )
+
+        # Determine if our pypi_version is older
+        if not local_version_is_older:
+            return
+
+        # Advise "python -m pip" on Windows to avoid issues
+        # with overwriting pip.exe.
+        if WINDOWS:
+            pip_cmd = "python -m pip"
+        else:
+            pip_cmd = "pip"
+        logger.warning(
+            "You are using pip version %s, however version %s is "
+            "available.\nYou should consider upgrading via the "
+            "'%s install --upgrade pip' command.",
+            pip_version, pypi_version, pip_cmd
+        )
+    except Exception:
+        logger.debug(
+            "There was an error checking the latest version of pip",
+            exc_info=True,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/packaging.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/packaging.py
new file mode 100644
index 00000000..68aa86ed
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/packaging.py
@@ -0,0 +1,94 @@
+from __future__ import absolute_import
+
+import logging
+from email.parser import FeedParser
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging import specifiers, version
+
+from pip._internal.exceptions import NoneMetadataError
+from pip._internal.utils.misc import display_path
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+    from email.message import Message
+    from pip._vendor.pkg_resources import Distribution
+
+
+logger = logging.getLogger(__name__)
+
+
+def check_requires_python(requires_python, version_info):
+    # type: (Optional[str], Tuple[int, ...]) -> bool
+    """
+    Check if the given Python version matches a "Requires-Python" specifier.
+
+    :param version_info: A 3-tuple of ints representing a Python
+        major-minor-micro version to check (e.g. `sys.version_info[:3]`).
+
+    :return: `True` if the given Python version satisfies the requirement.
+        Otherwise, return `False`.
+
+    :raises InvalidSpecifier: If `requires_python` has an invalid format.
+    """
+    if requires_python is None:
+        # The package provides no information
+        return True
+    requires_python_specifier = specifiers.SpecifierSet(requires_python)
+
+    python_version = version.parse('.'.join(map(str, version_info)))
+    return python_version in requires_python_specifier
+
+
+def get_metadata(dist):
+    # type: (Distribution) -> Message
+    """
+    :raises NoneMetadataError: if the distribution reports `has_metadata()`
+        True but `get_metadata()` returns None.
+    """
+    metadata_name = 'METADATA'
+    if (isinstance(dist, pkg_resources.DistInfoDistribution) and
+            dist.has_metadata(metadata_name)):
+        metadata = dist.get_metadata(metadata_name)
+    elif dist.has_metadata('PKG-INFO'):
+        metadata_name = 'PKG-INFO'
+        metadata = dist.get_metadata(metadata_name)
+    else:
+        logger.warning("No metadata found in %s", display_path(dist.location))
+        metadata = ''
+
+    if metadata is None:
+        raise NoneMetadataError(dist, metadata_name)
+
+    feed_parser = FeedParser()
+    # The following line errors out if with a "NoneType" TypeError if
+    # passed metadata=None.
+    feed_parser.feed(metadata)
+    return feed_parser.close()
+
+
+def get_requires_python(dist):
+    # type: (pkg_resources.Distribution) -> Optional[str]
+    """
+    Return the "Requires-Python" metadata for a distribution, or None
+    if not present.
+    """
+    pkg_info_dict = get_metadata(dist)
+    requires_python = pkg_info_dict.get('Requires-Python')
+
+    if requires_python is not None:
+        # Convert to a str to satisfy the type checker, since requires_python
+        # can be a Header object.
+        requires_python = str(requires_python)
+
+    return requires_python
+
+
+def get_installer(dist):
+    # type: (Distribution) -> str
+    if dist.has_metadata('INSTALLER'):
+        for line in dist.get_metadata_lines('INSTALLER'):
+            if line.strip():
+                return line.strip()
+    return ''
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/setuptools_build.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/setuptools_build.py
new file mode 100644
index 00000000..58956072
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/setuptools_build.py
@@ -0,0 +1,36 @@
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+# Shim to wrap setup.py invocation with setuptools
+#
+# We set sys.argv[0] to the path to the underlying setup.py file so
+# setuptools / distutils don't take the path to the setup.py to be "-c" when
+# invoking via the shim.  This avoids e.g. the following manifest_maker
+# warning: "warning: manifest_maker: standard file '-c' not found".
+_SETUPTOOLS_SHIM = (
+    "import sys, setuptools, tokenize; sys.argv[0] = {0!r}; __file__={0!r};"
+    "f=getattr(tokenize, 'open', open)(__file__);"
+    "code=f.read().replace('\\r\\n', '\\n');"
+    "f.close();"
+    "exec(compile(code, __file__, 'exec'))"
+)
+
+
+def make_setuptools_shim_args(setup_py_path, unbuffered_output=False):
+    # type: (str, bool) -> List[str]
+    """
+    Get setuptools command arguments with shim wrapped setup file invocation.
+
+    :param setup_py_path: The path to setup.py to be wrapped.
+    :param unbuffered_output: If True, adds the unbuffered switch to the
+     argument list.
+    """
+    args = [sys.executable]
+    if unbuffered_output:
+        args.append('-u')
+    args.extend(['-c', _SETUPTOOLS_SHIM.format(setup_py_path)])
+    return args
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/temp_dir.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/temp_dir.py
new file mode 100644
index 00000000..2c81ad55
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/temp_dir.py
@@ -0,0 +1,155 @@
+from __future__ import absolute_import
+
+import errno
+import itertools
+import logging
+import os.path
+import tempfile
+
+from pip._internal.utils.misc import rmtree
+
+logger = logging.getLogger(__name__)
+
+
+class TempDirectory(object):
+    """Helper class that owns and cleans up a temporary directory.
+
+    This class can be used as a context manager or as an OO representation of a
+    temporary directory.
+
+    Attributes:
+        path
+            Location to the created temporary directory or None
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    Methods:
+        create()
+            Creates a temporary directory and stores its path in the path
+            attribute.
+        cleanup()
+            Deletes the temporary directory and sets path attribute to None
+
+    When used as a context manager, a temporary directory is created on
+    entering the context and, if the delete attribute is True, on exiting the
+    context the created directory is deleted.
+    """
+
+    def __init__(self, path=None, delete=None, kind="temp"):
+        super(TempDirectory, self).__init__()
+
+        if path is None and delete is None:
+            # If we were not given an explicit directory, and we were not given
+            # an explicit delete option, then we'll default to deleting.
+            delete = True
+
+        self.path = path
+        self.delete = delete
+        self.kind = kind
+
+    def __repr__(self):
+        return "<{} {!r}>".format(self.__class__.__name__, self.path)
+
+    def __enter__(self):
+        self.create()
+        return self
+
+    def __exit__(self, exc, value, tb):
+        if self.delete:
+            self.cleanup()
+
+    def create(self):
+        """Create a temporary directory and store its path in self.path
+        """
+        if self.path is not None:
+            logger.debug(
+                "Skipped creation of temporary directory: {}".format(self.path)
+            )
+            return
+        # We realpath here because some systems have their default tmpdir
+        # symlinked to another directory.  This tends to confuse build
+        # scripts, so we canonicalize the path by traversing potential
+        # symlinks here.
+        self.path = os.path.realpath(
+            tempfile.mkdtemp(prefix="pip-{}-".format(self.kind))
+        )
+        logger.debug("Created temporary directory: {}".format(self.path))
+
+    def cleanup(self):
+        """Remove the temporary directory created and reset state
+        """
+        if self.path is not None and os.path.exists(self.path):
+            rmtree(self.path)
+        self.path = None
+
+
+class AdjacentTempDirectory(TempDirectory):
+    """Helper class that creates a temporary directory adjacent to a real one.
+
+    Attributes:
+        original
+            The original directory to create a temp directory for.
+        path
+            After calling create() or entering, contains the full
+            path to the temporary directory.
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    """
+    # The characters that may be used to name the temp directory
+    # We always prepend a ~ and then rotate through these until
+    # a usable name is found.
+    # pkg_resources raises a different error for .dist-info folder
+    # with leading '-' and invalid metadata
+    LEADING_CHARS = "-~.=%0123456789"
+
+    def __init__(self, original, delete=None):
+        super(AdjacentTempDirectory, self).__init__(delete=delete)
+        self.original = original.rstrip('/\\')
+
+    @classmethod
+    def _generate_names(cls, name):
+        """Generates a series of temporary names.
+
+        The algorithm replaces the leading characters in the name
+        with ones that are valid filesystem characters, but are not
+        valid package names (for both Python and pip definitions of
+        package).
+        """
+        for i in range(1, len(name)):
+            for candidate in itertools.combinations_with_replacement(
+                    cls.LEADING_CHARS, i - 1):
+                new_name = '~' + ''.join(candidate) + name[i:]
+                if new_name != name:
+                    yield new_name
+
+        # If we make it this far, we will have to make a longer name
+        for i in range(len(cls.LEADING_CHARS)):
+            for candidate in itertools.combinations_with_replacement(
+                    cls.LEADING_CHARS, i):
+                new_name = '~' + ''.join(candidate) + name
+                if new_name != name:
+                    yield new_name
+
+    def create(self):
+        root, name = os.path.split(self.original)
+        for candidate in self._generate_names(name):
+            path = os.path.join(root, candidate)
+            try:
+                os.mkdir(path)
+            except OSError as ex:
+                # Continue if the name exists already
+                if ex.errno != errno.EEXIST:
+                    raise
+            else:
+                self.path = os.path.realpath(path)
+                break
+
+        if not self.path:
+            # Final fallback on the default behavior.
+            self.path = os.path.realpath(
+                tempfile.mkdtemp(prefix="pip-{}-".format(self.kind))
+            )
+        logger.debug("Created temporary directory: {}".format(self.path))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/typing.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/typing.py
new file mode 100644
index 00000000..10170ce2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/typing.py
@@ -0,0 +1,29 @@
+"""For neatly implementing static typing in pip.
+
+`mypy` - the static type analysis tool we use - uses the `typing` module, which
+provides core functionality fundamental to mypy's functioning.
+
+Generally, `typing` would be imported at runtime and used in that fashion -
+it acts as a no-op at runtime and does not have any run-time overhead by
+design.
+
+As it turns out, `typing` is not vendorable - it uses separate sources for
+Python 2/Python 3. Thus, this codebase can not expect it to be present.
+To work around this, mypy allows the typing import to be behind a False-y
+optional to prevent it from running at runtime and type-comments can be used
+to remove the need for the types to be accessible directly during runtime.
+
+This module provides the False-y guard in a nicely named fashion so that a
+curious maintainer can reach here to read this.
+
+In pip, all static-typing related imports should be guarded as follows:
+
+    from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+    if MYPY_CHECK_RUNNING:
+        from typing import ...
+
+Ref: https://github.com/python/mypy/issues/3216
+"""
+
+MYPY_CHECK_RUNNING = False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/ui.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/ui.py
new file mode 100644
index 00000000..46390f4a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/ui.py
@@ -0,0 +1,424 @@
+from __future__ import absolute_import, division
+
+import contextlib
+import itertools
+import logging
+import sys
+import time
+from signal import SIGINT, default_int_handler, signal
+
+from pip._vendor import six
+from pip._vendor.progress import HIDE_CURSOR, SHOW_CURSOR
+from pip._vendor.progress.bar import Bar, FillingCirclesBar, IncrementalBar
+from pip._vendor.progress.spinner import Spinner
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import get_indentation
+from pip._internal.utils.misc import format_size
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Iterator, IO
+
+try:
+    from pip._vendor import colorama
+# Lots of different errors can come from this, including SystemError and
+# ImportError.
+except Exception:
+    colorama = None
+
+logger = logging.getLogger(__name__)
+
+
+def _select_progress_class(preferred, fallback):
+    encoding = getattr(preferred.file, "encoding", None)
+
+    # If we don't know what encoding this file is in, then we'll just assume
+    # that it doesn't support unicode and use the ASCII bar.
+    if not encoding:
+        return fallback
+
+    # Collect all of the possible characters we want to use with the preferred
+    # bar.
+    characters = [
+        getattr(preferred, "empty_fill", six.text_type()),
+        getattr(preferred, "fill", six.text_type()),
+    ]
+    characters += list(getattr(preferred, "phases", []))
+
+    # Try to decode the characters we're using for the bar using the encoding
+    # of the given file, if this works then we'll assume that we can use the
+    # fancier bar and if not we'll fall back to the plaintext bar.
+    try:
+        six.text_type().join(characters).encode(encoding)
+    except UnicodeEncodeError:
+        return fallback
+    else:
+        return preferred
+
+
+_BaseBar = _select_progress_class(IncrementalBar, Bar)  # type: Any
+
+
+class InterruptibleMixin(object):
+    """
+    Helper to ensure that self.finish() gets called on keyboard interrupt.
+
+    This allows downloads to be interrupted without leaving temporary state
+    (like hidden cursors) behind.
+
+    This class is similar to the progress library's existing SigIntMixin
+    helper, but as of version 1.2, that helper has the following problems:
+
+    1. It calls sys.exit().
+    2. It discards the existing SIGINT handler completely.
+    3. It leaves its own handler in place even after an uninterrupted finish,
+       which will have unexpected delayed effects if the user triggers an
+       unrelated keyboard interrupt some time after a progress-displaying
+       download has already completed, for example.
+    """
+
+    def __init__(self, *args, **kwargs):
+        """
+        Save the original SIGINT handler for later.
+        """
+        super(InterruptibleMixin, self).__init__(*args, **kwargs)
+
+        self.original_handler = signal(SIGINT, self.handle_sigint)
+
+        # If signal() returns None, the previous handler was not installed from
+        # Python, and we cannot restore it. This probably should not happen,
+        # but if it does, we must restore something sensible instead, at least.
+        # The least bad option should be Python's default SIGINT handler, which
+        # just raises KeyboardInterrupt.
+        if self.original_handler is None:
+            self.original_handler = default_int_handler
+
+    def finish(self):
+        """
+        Restore the original SIGINT handler after finishing.
+
+        This should happen regardless of whether the progress display finishes
+        normally, or gets interrupted.
+        """
+        super(InterruptibleMixin, self).finish()
+        signal(SIGINT, self.original_handler)
+
+    def handle_sigint(self, signum, frame):
+        """
+        Call self.finish() before delegating to the original SIGINT handler.
+
+        This handler should only be in place while the progress display is
+        active.
+        """
+        self.finish()
+        self.original_handler(signum, frame)
+
+
+class SilentBar(Bar):
+
+    def update(self):
+        pass
+
+
+class BlueEmojiBar(IncrementalBar):
+
+    suffix = "%(percent)d%%"
+    bar_prefix = " "
+    bar_suffix = " "
+    phases = (u"\U0001F539", u"\U0001F537", u"\U0001F535")  # type: Any
+
+
+class DownloadProgressMixin(object):
+
+    def __init__(self, *args, **kwargs):
+        super(DownloadProgressMixin, self).__init__(*args, **kwargs)
+        self.message = (" " * (get_indentation() + 2)) + self.message
+
+    @property
+    def downloaded(self):
+        return format_size(self.index)
+
+    @property
+    def download_speed(self):
+        # Avoid zero division errors...
+        if self.avg == 0.0:
+            return "..."
+        return format_size(1 / self.avg) + "/s"
+
+    @property
+    def pretty_eta(self):
+        if self.eta:
+            return "eta %s" % self.eta_td
+        return ""
+
+    def iter(self, it, n=1):
+        for x in it:
+            yield x
+            self.next(n)
+        self.finish()
+
+
+class WindowsMixin(object):
+
+    def __init__(self, *args, **kwargs):
+        # The Windows terminal does not support the hide/show cursor ANSI codes
+        # even with colorama. So we'll ensure that hide_cursor is False on
+        # Windows.
+        # This call needs to go before the super() call, so that hide_cursor
+        # is set in time. The base progress bar class writes the "hide cursor"
+        # code to the terminal in its init, so if we don't set this soon
+        # enough, we get a "hide" with no corresponding "show"...
+        if WINDOWS and self.hide_cursor:
+            self.hide_cursor = False
+
+        super(WindowsMixin, self).__init__(*args, **kwargs)
+
+        # Check if we are running on Windows and we have the colorama module,
+        # if we do then wrap our file with it.
+        if WINDOWS and colorama:
+            self.file = colorama.AnsiToWin32(self.file)
+            # The progress code expects to be able to call self.file.isatty()
+            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
+            # add it.
+            self.file.isatty = lambda: self.file.wrapped.isatty()
+            # The progress code expects to be able to call self.file.flush()
+            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
+            # add it.
+            self.file.flush = lambda: self.file.wrapped.flush()
+
+
+class BaseDownloadProgressBar(WindowsMixin, InterruptibleMixin,
+                              DownloadProgressMixin):
+
+    file = sys.stdout
+    message = "%(percent)d%%"
+    suffix = "%(downloaded)s %(download_speed)s %(pretty_eta)s"
+
+# NOTE: The "type: ignore" comments on the following classes are there to
+#       work around https://github.com/python/typing/issues/241
+
+
+class DefaultDownloadProgressBar(BaseDownloadProgressBar,
+                                 _BaseBar):
+    pass
+
+
+class DownloadSilentBar(BaseDownloadProgressBar, SilentBar):  # type: ignore
+    pass
+
+
+class DownloadBar(BaseDownloadProgressBar,  # type: ignore
+                  Bar):
+    pass
+
+
+class DownloadFillingCirclesBar(BaseDownloadProgressBar,  # type: ignore
+                                FillingCirclesBar):
+    pass
+
+
+class DownloadBlueEmojiProgressBar(BaseDownloadProgressBar,  # type: ignore
+                                   BlueEmojiBar):
+    pass
+
+
+class DownloadProgressSpinner(WindowsMixin, InterruptibleMixin,
+                              DownloadProgressMixin, Spinner):
+
+    file = sys.stdout
+    suffix = "%(downloaded)s %(download_speed)s"
+
+    def next_phase(self):
+        if not hasattr(self, "_phaser"):
+            self._phaser = itertools.cycle(self.phases)
+        return next(self._phaser)
+
+    def update(self):
+        message = self.message % self
+        phase = self.next_phase()
+        suffix = self.suffix % self
+        line = ''.join([
+            message,
+            " " if message else "",
+            phase,
+            " " if suffix else "",
+            suffix,
+        ])
+
+        self.writeln(line)
+
+
+BAR_TYPES = {
+    "off": (DownloadSilentBar, DownloadSilentBar),
+    "on": (DefaultDownloadProgressBar, DownloadProgressSpinner),
+    "ascii": (DownloadBar, DownloadProgressSpinner),
+    "pretty": (DownloadFillingCirclesBar, DownloadProgressSpinner),
+    "emoji": (DownloadBlueEmojiProgressBar, DownloadProgressSpinner)
+}
+
+
+def DownloadProgressProvider(progress_bar, max=None):
+    if max is None or max == 0:
+        return BAR_TYPES[progress_bar][1]().iter
+    else:
+        return BAR_TYPES[progress_bar][0](max=max).iter
+
+
+################################################################
+# Generic "something is happening" spinners
+#
+# We don't even try using progress.spinner.Spinner here because it's actually
+# simpler to reimplement from scratch than to coerce their code into doing
+# what we need.
+################################################################
+
+@contextlib.contextmanager
+def hidden_cursor(file):
+    # type: (IO) -> Iterator[None]
+    # The Windows terminal does not support the hide/show cursor ANSI codes,
+    # even via colorama. So don't even try.
+    if WINDOWS:
+        yield
+    # We don't want to clutter the output with control characters if we're
+    # writing to a file, or if the user is running with --quiet.
+    # See https://github.com/pypa/pip/issues/3418
+    elif not file.isatty() or logger.getEffectiveLevel() > logging.INFO:
+        yield
+    else:
+        file.write(HIDE_CURSOR)
+        try:
+            yield
+        finally:
+            file.write(SHOW_CURSOR)
+
+
+class RateLimiter(object):
+    def __init__(self, min_update_interval_seconds):
+        # type: (float) -> None
+        self._min_update_interval_seconds = min_update_interval_seconds
+        self._last_update = 0  # type: float
+
+    def ready(self):
+        # type: () -> bool
+        now = time.time()
+        delta = now - self._last_update
+        return delta >= self._min_update_interval_seconds
+
+    def reset(self):
+        # type: () -> None
+        self._last_update = time.time()
+
+
+class SpinnerInterface(object):
+    def spin(self):
+        # type: () -> None
+        raise NotImplementedError()
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        raise NotImplementedError()
+
+
+class InteractiveSpinner(SpinnerInterface):
+    def __init__(self, message, file=None, spin_chars="-\\|/",
+                 # Empirically, 8 updates/second looks nice
+                 min_update_interval_seconds=0.125):
+        self._message = message
+        if file is None:
+            file = sys.stdout
+        self._file = file
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._finished = False
+
+        self._spin_cycle = itertools.cycle(spin_chars)
+
+        self._file.write(" " * get_indentation() + self._message + " ... ")
+        self._width = 0
+
+    def _write(self, status):
+        assert not self._finished
+        # Erase what we wrote before by backspacing to the beginning, writing
+        # spaces to overwrite the old text, and then backspacing again
+        backup = "\b" * self._width
+        self._file.write(backup + " " * self._width + backup)
+        # Now we have a blank slate to add our status
+        self._file.write(status)
+        self._width = len(status)
+        self._file.flush()
+        self._rate_limiter.reset()
+
+    def spin(self):
+        # type: () -> None
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._write(next(self._spin_cycle))
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        if self._finished:
+            return
+        self._write(final_status)
+        self._file.write("\n")
+        self._file.flush()
+        self._finished = True
+
+
+# Used for dumb terminals, non-interactive installs (no tty), etc.
+# We still print updates occasionally (once every 60 seconds by default) to
+# act as a keep-alive for systems like Travis-CI that take lack-of-output as
+# an indication that a task has frozen.
+class NonInteractiveSpinner(SpinnerInterface):
+    def __init__(self, message, min_update_interval_seconds=60):
+        # type: (str, float) -> None
+        self._message = message
+        self._finished = False
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._update("started")
+
+    def _update(self, status):
+        assert not self._finished
+        self._rate_limiter.reset()
+        logger.info("%s: %s", self._message, status)
+
+    def spin(self):
+        # type: () -> None
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._update("still running...")
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        if self._finished:
+            return
+        self._update("finished with status '%s'" % (final_status,))
+        self._finished = True
+
+
+@contextlib.contextmanager
+def open_spinner(message):
+    # type: (str) -> Iterator[SpinnerInterface]
+    # Interactive spinner goes directly to sys.stdout rather than being routed
+    # through the logging system, but it acts like it has level INFO,
+    # i.e. it's only displayed if we're at level INFO or better.
+    # Non-interactive spinner goes through the logging system, so it is always
+    # in sync with logging configuration.
+    if sys.stdout.isatty() and logger.getEffectiveLevel() <= logging.INFO:
+        spinner = InteractiveSpinner(message)  # type: SpinnerInterface
+    else:
+        spinner = NonInteractiveSpinner(message)
+    try:
+        with hidden_cursor(sys.stdout):
+            yield spinner
+    except KeyboardInterrupt:
+        spinner.finish("canceled")
+        raise
+    except Exception:
+        spinner.finish("error")
+        raise
+    else:
+        spinner.finish("done")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/virtualenv.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/virtualenv.py
new file mode 100644
index 00000000..380db1c3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/utils/virtualenv.py
@@ -0,0 +1,34 @@
+import os.path
+import site
+import sys
+
+
+def running_under_virtualenv():
+    # type: () -> bool
+    """
+    Return True if we're running inside a virtualenv, False otherwise.
+
+    """
+    if hasattr(sys, 'real_prefix'):
+        # pypa/virtualenv case
+        return True
+    elif sys.prefix != getattr(sys, "base_prefix", sys.prefix):
+        # PEP 405 venv
+        return True
+
+    return False
+
+
+def virtualenv_no_global():
+    # type: () -> bool
+    """
+    Return True if in a venv and no system site packages.
+    """
+    # this mirrors the logic in virtualenv.py for locating the
+    # no-global-site-packages.txt file
+    site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
+    no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt')
+    if running_under_virtualenv() and os.path.isfile(no_global_file):
+        return True
+    else:
+        return False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__init__.py
new file mode 100644
index 00000000..cb573ab6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__init__.py
@@ -0,0 +1,12 @@
+# Expose a limited set of classes and functions so callers outside of
+# the vcs package don't need to import deeper than `pip._internal.vcs`.
+# (The test directory and imports protected by MYPY_CHECK_RUNNING may
+# still need to import from a vcs sub-package.)
+from pip._internal.vcs.versioncontrol import (  # noqa: F401
+    RemoteNotFoundError, make_vcs_requirement_url, vcs,
+)
+# Import all vcs modules to register each VCS in the VcsSupport object.
+import pip._internal.vcs.bazaar
+import pip._internal.vcs.git
+import pip._internal.vcs.mercurial
+import pip._internal.vcs.subversion  # noqa: F401
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..a4eba3d7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-37.pyc
new file mode 100644
index 00000000..126f552c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/git.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/git.cpython-37.pyc
new file mode 100644
index 00000000..e331d430
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/git.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-37.pyc
new file mode 100644
index 00000000..898fd9a2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-37.pyc
new file mode 100644
index 00000000..abf6452d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-37.pyc
new file mode 100644
index 00000000..d9a06ebf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/bazaar.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/bazaar.py
new file mode 100644
index 00000000..4f1e114b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/bazaar.py
@@ -0,0 +1,101 @@
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.misc import display_path, path_to_url, rmtree
+from pip._internal.vcs.versioncontrol import VersionControl, vcs
+
+logger = logging.getLogger(__name__)
+
+
+class Bazaar(VersionControl):
+    name = 'bzr'
+    dirname = '.bzr'
+    repo_name = 'branch'
+    schemes = (
+        'bzr', 'bzr+http', 'bzr+https', 'bzr+ssh', 'bzr+sftp', 'bzr+ftp',
+        'bzr+lp',
+    )
+
+    def __init__(self, *args, **kwargs):
+        super(Bazaar, self).__init__(*args, **kwargs)
+        # This is only needed for python <2.7.5
+        # Register lp but do not expose as a scheme to support bzr+lp.
+        if getattr(urllib_parse, 'uses_fragment', None):
+            urllib_parse.uses_fragment.extend(['lp'])
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return ['-r', rev]
+
+    def export(self, location, url):
+        """
+        Export the Bazaar repository at the url to the destination location
+        """
+        # Remove the location to make sure Bazaar can export it correctly
+        if os.path.exists(location):
+            rmtree(location)
+
+        url, rev_options = self.get_url_rev_options(url)
+        self.run_command(
+            ['export', location, url] + rev_options.to_args(),
+            show_stdout=False,
+        )
+
+    def fetch_new(self, dest, url, rev_options):
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Checking out %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        cmd_args = ['branch', '-q'] + rev_options.to_args() + [url, dest]
+        self.run_command(cmd_args)
+
+    def switch(self, dest, url, rev_options):
+        self.run_command(['switch', url], cwd=dest)
+
+    def update(self, dest, url, rev_options):
+        cmd_args = ['pull', '-q'] + rev_options.to_args()
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # hotfix the URL scheme after removing bzr+ from bzr+ssh:// readd it
+        url, rev, user_pass = super(Bazaar, cls).get_url_rev_and_auth(url)
+        if url.startswith('ssh://'):
+            url = 'bzr+' + url
+        return url, rev, user_pass
+
+    @classmethod
+    def get_remote_url(cls, location):
+        urls = cls.run_command(['info'], show_stdout=False, cwd=location)
+        for line in urls.splitlines():
+            line = line.strip()
+            for x in ('checkout of branch: ',
+                      'parent branch: '):
+                if line.startswith(x):
+                    repo = line.split(x)[1]
+                    if cls._is_local_repository(repo):
+                        return path_to_url(repo)
+                    return repo
+        return None
+
+    @classmethod
+    def get_revision(cls, location):
+        revision = cls.run_command(
+            ['revno'], show_stdout=False, cwd=location,
+        )
+        return revision.splitlines()[-1]
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+
+vcs.register(Bazaar)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/git.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/git.py
new file mode 100644
index 00000000..3445c1b3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/git.py
@@ -0,0 +1,358 @@
+from __future__ import absolute_import
+
+import logging
+import os.path
+import re
+
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+from pip._internal.exceptions import BadCommand
+from pip._internal.utils.compat import samefile
+from pip._internal.utils.misc import display_path, redact_password_from_url
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.vcs.versioncontrol import (
+    RemoteNotFoundError, VersionControl, vcs,
+)
+
+urlsplit = urllib_parse.urlsplit
+urlunsplit = urllib_parse.urlunsplit
+
+
+logger = logging.getLogger(__name__)
+
+
+HASH_REGEX = re.compile('^[a-fA-F0-9]{40}$')
+
+
+def looks_like_hash(sha):
+    return bool(HASH_REGEX.match(sha))
+
+
+class Git(VersionControl):
+    name = 'git'
+    dirname = '.git'
+    repo_name = 'clone'
+    schemes = (
+        'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
+    )
+    # Prevent the user's environment variables from interfering with pip:
+    # https://github.com/pypa/pip/issues/1130
+    unset_environ = ('GIT_DIR', 'GIT_WORK_TREE')
+    default_arg_rev = 'HEAD'
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return [rev]
+
+    def get_git_version(self):
+        VERSION_PFX = 'git version '
+        version = self.run_command(['version'], show_stdout=False)
+        if version.startswith(VERSION_PFX):
+            version = version[len(VERSION_PFX):].split()[0]
+        else:
+            version = ''
+        # get first 3 positions of the git version because
+        # on windows it is x.y.z.windows.t, and this parses as
+        # LegacyVersion which always smaller than a Version.
+        version = '.'.join(version.split('.')[:3])
+        return parse_version(version)
+
+    @classmethod
+    def get_current_branch(cls, location):
+        """
+        Return the current branch, or None if HEAD isn't at a branch
+        (e.g. detached HEAD).
+        """
+        # git-symbolic-ref exits with empty stdout if "HEAD" is a detached
+        # HEAD rather than a symbolic ref.  In addition, the -q causes the
+        # command to exit with status code 1 instead of 128 in this case
+        # and to suppress the message to stderr.
+        args = ['symbolic-ref', '-q', 'HEAD']
+        output = cls.run_command(
+            args, extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
+        )
+        ref = output.strip()
+
+        if ref.startswith('refs/heads/'):
+            return ref[len('refs/heads/'):]
+
+        return None
+
+    def export(self, location, url):
+        """Export the Git repository at the url to the destination location"""
+        if not location.endswith('/'):
+            location = location + '/'
+
+        with TempDirectory(kind="export") as temp_dir:
+            self.unpack(temp_dir.path, url=url)
+            self.run_command(
+                ['checkout-index', '-a', '-f', '--prefix', location],
+                show_stdout=False, cwd=temp_dir.path
+            )
+
+    @classmethod
+    def get_revision_sha(cls, dest, rev):
+        """
+        Return (sha_or_none, is_branch), where sha_or_none is a commit hash
+        if the revision names a remote branch or tag, otherwise None.
+
+        Args:
+          dest: the repository directory.
+          rev: the revision name.
+        """
+        # Pass rev to pre-filter the list.
+        output = cls.run_command(['show-ref', rev], cwd=dest,
+                                 show_stdout=False, on_returncode='ignore')
+        refs = {}
+        for line in output.strip().splitlines():
+            try:
+                sha, ref = line.split()
+            except ValueError:
+                # Include the offending line to simplify troubleshooting if
+                # this error ever occurs.
+                raise ValueError('unexpected show-ref line: {!r}'.format(line))
+
+            refs[ref] = sha
+
+        branch_ref = 'refs/remotes/origin/{}'.format(rev)
+        tag_ref = 'refs/tags/{}'.format(rev)
+
+        sha = refs.get(branch_ref)
+        if sha is not None:
+            return (sha, True)
+
+        sha = refs.get(tag_ref)
+
+        return (sha, False)
+
+    @classmethod
+    def resolve_revision(cls, dest, url, rev_options):
+        """
+        Resolve a revision to a new RevOptions object with the SHA1 of the
+        branch, tag, or ref if found.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        rev = rev_options.arg_rev
+        sha, is_branch = cls.get_revision_sha(dest, rev)
+
+        if sha is not None:
+            rev_options = rev_options.make_new(sha)
+            rev_options.branch_name = rev if is_branch else None
+
+            return rev_options
+
+        # Do not show a warning for the common case of something that has
+        # the form of a Git commit hash.
+        if not looks_like_hash(rev):
+            logger.warning(
+                "Did not find branch or tag '%s', assuming revision or ref.",
+                rev,
+            )
+
+        if not rev.startswith('refs/'):
+            return rev_options
+
+        # If it looks like a ref, we have to fetch it explicitly.
+        cls.run_command(
+            ['fetch', '-q', url] + rev_options.to_args(),
+            cwd=dest,
+        )
+        # Change the revision to the SHA of the ref we fetched
+        sha = cls.get_revision(dest, rev='FETCH_HEAD')
+        rev_options = rev_options.make_new(sha)
+
+        return rev_options
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """
+        Return whether the current commit hash equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        if not name:
+            # Then avoid an unnecessary subprocess call.
+            return False
+
+        return cls.get_revision(dest) == name
+
+    def fetch_new(self, dest, url, rev_options):
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Cloning %s%s to %s', redact_password_from_url(url),
+            rev_display, display_path(dest),
+        )
+        self.run_command(['clone', '-q', url, dest])
+
+        if rev_options.rev:
+            # Then a specific revision was requested.
+            rev_options = self.resolve_revision(dest, url, rev_options)
+            branch_name = getattr(rev_options, 'branch_name', None)
+            if branch_name is None:
+                # Only do a checkout if the current commit id doesn't match
+                # the requested revision.
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    cmd_args = ['checkout', '-q'] + rev_options.to_args()
+                    self.run_command(cmd_args, cwd=dest)
+            elif self.get_current_branch(dest) != branch_name:
+                # Then a specific branch was requested, and that branch
+                # is not yet checked out.
+                track_branch = 'origin/{}'.format(branch_name)
+                cmd_args = [
+                    'checkout', '-b', branch_name, '--track', track_branch,
+                ]
+                self.run_command(cmd_args, cwd=dest)
+
+        #: repo may contain submodules
+        self.update_submodules(dest)
+
+    def switch(self, dest, url, rev_options):
+        self.run_command(['config', 'remote.origin.url', url], cwd=dest)
+        cmd_args = ['checkout', '-q'] + rev_options.to_args()
+        self.run_command(cmd_args, cwd=dest)
+
+        self.update_submodules(dest)
+
+    def update(self, dest, url, rev_options):
+        # First fetch changes from the default remote
+        if self.get_git_version() >= parse_version('1.9.0'):
+            # fetch tags in addition to everything else
+            self.run_command(['fetch', '-q', '--tags'], cwd=dest)
+        else:
+            self.run_command(['fetch', '-q'], cwd=dest)
+        # Then reset to wanted revision (maybe even origin/master)
+        rev_options = self.resolve_revision(dest, url, rev_options)
+        cmd_args = ['reset', '--hard', '-q'] + rev_options.to_args()
+        self.run_command(cmd_args, cwd=dest)
+        #: update submodules
+        self.update_submodules(dest)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        """
+        Return URL of the first remote encountered.
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        # We need to pass 1 for extra_ok_returncodes since the command
+        # exits with return code 1 if there are no matching lines.
+        stdout = cls.run_command(
+            ['config', '--get-regexp', r'remote\..*\.url'],
+            extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
+        )
+        remotes = stdout.splitlines()
+        try:
+            found_remote = remotes[0]
+        except IndexError:
+            raise RemoteNotFoundError
+
+        for remote in remotes:
+            if remote.startswith('remote.origin.url '):
+                found_remote = remote
+                break
+        url = found_remote.split(' ')[1]
+        return url.strip()
+
+    @classmethod
+    def get_revision(cls, location, rev=None):
+        if rev is None:
+            rev = 'HEAD'
+        current_rev = cls.run_command(
+            ['rev-parse', rev], show_stdout=False, cwd=location,
+        )
+        return current_rev.strip()
+
+    @classmethod
+    def get_subdirectory(cls, location):
+        # find the repo root
+        git_dir = cls.run_command(['rev-parse', '--git-dir'],
+                                  show_stdout=False, cwd=location).strip()
+        if not os.path.isabs(git_dir):
+            git_dir = os.path.join(location, git_dir)
+        root_dir = os.path.join(git_dir, '..')
+        # find setup.py
+        orig_location = location
+        while not os.path.exists(os.path.join(location, 'setup.py')):
+            last_location = location
+            location = os.path.dirname(location)
+            if location == last_location:
+                # We've traversed up to the root of the filesystem without
+                # finding setup.py
+                logger.warning(
+                    "Could not find setup.py for directory %s (tried all "
+                    "parent directories)",
+                    orig_location,
+                )
+                return None
+        # relative path of setup.py to repo root
+        if samefile(root_dir, location):
+            return None
+        return os.path.relpath(location, root_dir)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        """
+        Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
+        That's required because although they use SSH they sometimes don't
+        work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
+        parsing. Hence we remove it again afterwards and return it as a stub.
+        """
+        # Works around an apparent Git bug
+        # (see https://article.gmane.org/gmane.comp.version-control.git/146500)
+        scheme, netloc, path, query, fragment = urlsplit(url)
+        if scheme.endswith('file'):
+            initial_slashes = path[:-len(path.lstrip('/'))]
+            newpath = (
+                initial_slashes +
+                urllib_request.url2pathname(path)
+                .replace('\\', '/').lstrip('/')
+            )
+            url = urlunsplit((scheme, netloc, newpath, query, fragment))
+            after_plus = scheme.find('+') + 1
+            url = scheme[:after_plus] + urlunsplit(
+                (scheme[after_plus:], netloc, newpath, query, fragment),
+            )
+
+        if '://' not in url:
+            assert 'file:' not in url
+            url = url.replace('git+', 'git+ssh://')
+            url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
+            url = url.replace('ssh://', '')
+        else:
+            url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
+
+        return url, rev, user_pass
+
+    @classmethod
+    def update_submodules(cls, location):
+        if not os.path.exists(os.path.join(location, '.gitmodules')):
+            return
+        cls.run_command(
+            ['submodule', 'update', '--init', '--recursive', '-q'],
+            cwd=location,
+        )
+
+    @classmethod
+    def controls_location(cls, location):
+        if super(Git, cls).controls_location(location):
+            return True
+        try:
+            r = cls.run_command(['rev-parse'],
+                                cwd=location,
+                                show_stdout=False,
+                                on_returncode='ignore')
+            return not r
+        except BadCommand:
+            logger.debug("could not determine if %s is under git control "
+                         "because git is not available", location)
+            return False
+
+
+vcs.register(Git)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/mercurial.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/mercurial.py
new file mode 100644
index 00000000..db42783d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/mercurial.py
@@ -0,0 +1,103 @@
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._vendor.six.moves import configparser
+
+from pip._internal.utils.misc import display_path, path_to_url
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.vcs.versioncontrol import VersionControl, vcs
+
+logger = logging.getLogger(__name__)
+
+
+class Mercurial(VersionControl):
+    name = 'hg'
+    dirname = '.hg'
+    repo_name = 'clone'
+    schemes = ('hg', 'hg+http', 'hg+https', 'hg+ssh', 'hg+static-http')
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return [rev]
+
+    def export(self, location, url):
+        """Export the Hg repository at the url to the destination location"""
+        with TempDirectory(kind="export") as temp_dir:
+            self.unpack(temp_dir.path, url=url)
+
+            self.run_command(
+                ['archive', location], show_stdout=False, cwd=temp_dir.path
+            )
+
+    def fetch_new(self, dest, url, rev_options):
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Cloning hg %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        self.run_command(['clone', '--noupdate', '-q', url, dest])
+        cmd_args = ['update', '-q'] + rev_options.to_args()
+        self.run_command(cmd_args, cwd=dest)
+
+    def switch(self, dest, url, rev_options):
+        repo_config = os.path.join(dest, self.dirname, 'hgrc')
+        config = configparser.RawConfigParser()
+        try:
+            config.read(repo_config)
+            config.set('paths', 'default', url)
+            with open(repo_config, 'w') as config_file:
+                config.write(config_file)
+        except (OSError, configparser.NoSectionError) as exc:
+            logger.warning(
+                'Could not switch Mercurial repository to %s: %s', url, exc,
+            )
+        else:
+            cmd_args = ['update', '-q'] + rev_options.to_args()
+            self.run_command(cmd_args, cwd=dest)
+
+    def update(self, dest, url, rev_options):
+        self.run_command(['pull', '-q'], cwd=dest)
+        cmd_args = ['update', '-q'] + rev_options.to_args()
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        url = cls.run_command(
+            ['showconfig', 'paths.default'],
+            show_stdout=False, cwd=location).strip()
+        if cls._is_local_repository(url):
+            url = path_to_url(url)
+        return url.strip()
+
+    @classmethod
+    def get_revision(cls, location):
+        """
+        Return the repository-local changeset revision number, as an integer.
+        """
+        current_revision = cls.run_command(
+            ['parents', '--template={rev}'],
+            show_stdout=False, cwd=location).strip()
+        return current_revision
+
+    @classmethod
+    def get_requirement_revision(cls, location):
+        """
+        Return the changeset identification hash, as a 40-character
+        hexadecimal string
+        """
+        current_rev_hash = cls.run_command(
+            ['parents', '--template={node}'],
+            show_stdout=False, cwd=location).strip()
+        return current_rev_hash
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+
+vcs.register(Mercurial)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/subversion.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/subversion.py
new file mode 100644
index 00000000..6bb4c8c5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/subversion.py
@@ -0,0 +1,314 @@
+from __future__ import absolute_import
+
+import logging
+import os
+import re
+import sys
+
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    display_path, rmtree, split_auth_from_netloc,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.vcs.versioncontrol import VersionControl, vcs
+
+_svn_xml_url_re = re.compile('url="([^"]+)"')
+_svn_rev_re = re.compile(r'committed-rev="(\d+)"')
+_svn_info_xml_rev_re = re.compile(r'\s*revision="(\d+)"')
+_svn_info_xml_url_re = re.compile(r'<url>(.*)</url>')
+
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Tuple
+    from pip._internal.vcs.versioncontrol import RevOptions
+
+logger = logging.getLogger(__name__)
+
+
+class Subversion(VersionControl):
+    name = 'svn'
+    dirname = '.svn'
+    repo_name = 'checkout'
+    schemes = ('svn', 'svn+ssh', 'svn+http', 'svn+https', 'svn+svn')
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url):
+        return True
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return ['-r', rev]
+
+    @classmethod
+    def get_revision(cls, location):
+        """
+        Return the maximum revision for all files under a given location
+        """
+        # Note: taken from setuptools.command.egg_info
+        revision = 0
+
+        for base, dirs, files in os.walk(location):
+            if cls.dirname not in dirs:
+                dirs[:] = []
+                continue    # no sense walking uncontrolled subdirs
+            dirs.remove(cls.dirname)
+            entries_fn = os.path.join(base, cls.dirname, 'entries')
+            if not os.path.exists(entries_fn):
+                # FIXME: should we warn?
+                continue
+
+            dirurl, localrev = cls._get_svn_url_rev(base)
+
+            if base == location:
+                base = dirurl + '/'   # save the root url
+            elif not dirurl or not dirurl.startswith(base):
+                dirs[:] = []
+                continue    # not part of the same svn tree, skip it
+            revision = max(revision, localrev)
+        return revision
+
+    @classmethod
+    def get_netloc_and_auth(cls, netloc, scheme):
+        """
+        This override allows the auth information to be passed to svn via the
+        --username and --password options instead of via the URL.
+        """
+        if scheme == 'ssh':
+            # The --username and --password options can't be used for
+            # svn+ssh URLs, so keep the auth information in the URL.
+            return super(Subversion, cls).get_netloc_and_auth(netloc, scheme)
+
+        return split_auth_from_netloc(netloc)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # hotfix the URL scheme after removing svn+ from svn+ssh:// readd it
+        url, rev, user_pass = super(Subversion, cls).get_url_rev_and_auth(url)
+        if url.startswith('ssh://'):
+            url = 'svn+' + url
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(username, password):
+        extra_args = []
+        if username:
+            extra_args += ['--username', username]
+        if password:
+            extra_args += ['--password', password]
+
+        return extra_args
+
+    @classmethod
+    def get_remote_url(cls, location):
+        # In cases where the source is in a subdirectory, not alongside
+        # setup.py we have to look up in the location until we find a real
+        # setup.py
+        orig_location = location
+        while not os.path.exists(os.path.join(location, 'setup.py')):
+            last_location = location
+            location = os.path.dirname(location)
+            if location == last_location:
+                # We've traversed up to the root of the filesystem without
+                # finding setup.py
+                logger.warning(
+                    "Could not find setup.py for directory %s (tried all "
+                    "parent directories)",
+                    orig_location,
+                )
+                return None
+
+        return cls._get_svn_url_rev(location)[0]
+
+    @classmethod
+    def _get_svn_url_rev(cls, location):
+        from pip._internal.exceptions import InstallationError
+
+        entries_path = os.path.join(location, cls.dirname, 'entries')
+        if os.path.exists(entries_path):
+            with open(entries_path) as f:
+                data = f.read()
+        else:  # subversion >= 1.7 does not have the 'entries' file
+            data = ''
+
+        if (data.startswith('8') or
+                data.startswith('9') or
+                data.startswith('10')):
+            data = list(map(str.splitlines, data.split('\n\x0c\n')))
+            del data[0][0]  # get rid of the '8'
+            url = data[0][3]
+            revs = [int(d[9]) for d in data if len(d) > 9 and d[9]] + [0]
+        elif data.startswith('<?xml'):
+            match = _svn_xml_url_re.search(data)
+            if not match:
+                raise ValueError('Badly formatted data: %r' % data)
+            url = match.group(1)    # get repository URL
+            revs = [int(m.group(1)) for m in _svn_rev_re.finditer(data)] + [0]
+        else:
+            try:
+                # subversion >= 1.7
+                # Note that using get_remote_call_options is not necessary here
+                # because `svn info` is being run against a local directory.
+                # We don't need to worry about making sure interactive mode
+                # is being used to prompt for passwords, because passwords
+                # are only potentially needed for remote server requests.
+                xml = cls.run_command(
+                    ['info', '--xml', location],
+                    show_stdout=False,
+                )
+                url = _svn_info_xml_url_re.search(xml).group(1)
+                revs = [
+                    int(m.group(1)) for m in _svn_info_xml_rev_re.finditer(xml)
+                ]
+            except InstallationError:
+                url, revs = None, []
+
+        if revs:
+            rev = max(revs)
+        else:
+            rev = 0
+
+        return url, rev
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+    def __init__(self, use_interactive=None):
+        # type: (bool) -> None
+        if use_interactive is None:
+            use_interactive = sys.stdin.isatty()
+        self.use_interactive = use_interactive
+
+        # This member is used to cache the fetched version of the current
+        # ``svn`` client.
+        # Special value definitions:
+        #   None: Not evaluated yet.
+        #   Empty tuple: Could not parse version.
+        self._vcs_version = None  # type: Optional[Tuple[int, ...]]
+
+        super(Subversion, self).__init__()
+
+    def call_vcs_version(self):
+        # type: () -> Tuple[int, ...]
+        """Query the version of the currently installed Subversion client.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        # Example versions:
+        #   svn, version 1.10.3 (r1842928)
+        #      compiled Feb 25 2019, 14:20:39 on x86_64-apple-darwin17.0.0
+        #   svn, version 1.7.14 (r1542130)
+        #      compiled Mar 28 2018, 08:49:13 on x86_64-pc-linux-gnu
+        version_prefix = 'svn, version '
+        version = self.run_command(['--version'], show_stdout=False)
+        if not version.startswith(version_prefix):
+            return ()
+
+        version = version[len(version_prefix):].split()[0]
+        version_list = version.split('.')
+        try:
+            parsed_version = tuple(map(int, version_list))
+        except ValueError:
+            return ()
+
+        return parsed_version
+
+    def get_vcs_version(self):
+        # type: () -> Tuple[int, ...]
+        """Return the version of the currently installed Subversion client.
+
+        If the version of the Subversion client has already been queried,
+        a cached value will be used.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        if self._vcs_version is not None:
+            # Use cached version, if available.
+            # If parsing the version failed previously (empty tuple),
+            # do not attempt to parse it again.
+            return self._vcs_version
+
+        vcs_version = self.call_vcs_version()
+        self._vcs_version = vcs_version
+        return vcs_version
+
+    def get_remote_call_options(self):
+        # type: () -> List[str]
+        """Return options to be used on calls to Subversion that contact the server.
+
+        These options are applicable for the following ``svn`` subcommands used
+        in this class.
+
+            - checkout
+            - export
+            - switch
+            - update
+
+        :return: A list of command line arguments to pass to ``svn``.
+        """
+        if not self.use_interactive:
+            # --non-interactive switch is available since Subversion 0.14.4.
+            # Subversion < 1.8 runs in interactive mode by default.
+            return ['--non-interactive']
+
+        svn_version = self.get_vcs_version()
+        # By default, Subversion >= 1.8 runs in non-interactive mode if
+        # stdin is not a TTY. Since that is how pip invokes SVN, in
+        # call_subprocess(), pip must pass --force-interactive to ensure
+        # the user can be prompted for a password, if required.
+        #   SVN added the --force-interactive option in SVN 1.8. Since
+        # e.g. RHEL/CentOS 7, which is supported until 2024, ships with
+        # SVN 1.7, pip should continue to support SVN 1.7. Therefore, pip
+        # can't safely add the option if the SVN version is < 1.8 (or unknown).
+        if svn_version >= (1, 8):
+            return ['--force-interactive']
+
+        return []
+
+    def export(self, location, url):
+        """Export the svn repository at the url to the destination location"""
+        url, rev_options = self.get_url_rev_options(url)
+
+        logger.info('Exporting svn repository %s to %s', url, location)
+        with indent_log():
+            if os.path.exists(location):
+                # Subversion doesn't like to check out over an existing
+                # directory --force fixes this, but was only added in svn 1.5
+                rmtree(location)
+            cmd_args = (['export'] + self.get_remote_call_options() +
+                        rev_options.to_args() + [url, location])
+            self.run_command(cmd_args, show_stdout=False)
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, str, RevOptions) -> None
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Checking out %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        cmd_args = (['checkout', '-q'] +
+                    self.get_remote_call_options() +
+                    rev_options.to_args() + [url, dest])
+        self.run_command(cmd_args)
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, str, RevOptions) -> None
+        cmd_args = (['switch'] + self.get_remote_call_options() +
+                    rev_options.to_args() + [url, dest])
+        self.run_command(cmd_args)
+
+    def update(self, dest, url, rev_options):
+        # type: (str, str, RevOptions) -> None
+        cmd_args = (['update'] + self.get_remote_call_options() +
+                    rev_options.to_args() + [dest])
+        self.run_command(cmd_args)
+
+
+vcs.register(Subversion)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/versioncontrol.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/versioncontrol.py
new file mode 100644
index 00000000..2d05fc13
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/vcs/versioncontrol.py
@@ -0,0 +1,600 @@
+"""Handles all VCS (version control) support"""
+from __future__ import absolute_import
+
+import errno
+import logging
+import os
+import shutil
+import sys
+
+from pip._vendor import pkg_resources
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.exceptions import BadCommand
+from pip._internal.utils.misc import (
+    ask_path_exists, backup_dir, call_subprocess, display_path, rmtree,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, List, Mapping, Optional, Text, Tuple, Type
+    )
+    from pip._internal.utils.ui import SpinnerInterface
+
+    AuthInfo = Tuple[Optional[str], Optional[str]]
+
+__all__ = ['vcs']
+
+
+logger = logging.getLogger(__name__)
+
+
+def make_vcs_requirement_url(repo_url, rev, project_name, subdir=None):
+    """
+    Return the URL for a VCS requirement.
+
+    Args:
+      repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
+      project_name: the (unescaped) project name.
+    """
+    egg_project_name = pkg_resources.to_filename(project_name)
+    req = '{}@{}#egg={}'.format(repo_url, rev, egg_project_name)
+    if subdir:
+        req += '&subdirectory={}'.format(subdir)
+
+    return req
+
+
+class RemoteNotFoundError(Exception):
+    pass
+
+
+class RevOptions(object):
+
+    """
+    Encapsulates a VCS-specific revision to install, along with any VCS
+    install options.
+
+    Instances of this class should be treated as if immutable.
+    """
+
+    def __init__(
+        self,
+        vc_class,  # type: Type[VersionControl]
+        rev=None,  # type: Optional[str]
+        extra_args=None,  # type: Optional[List[str]]
+    ):
+        # type: (...) -> None
+        """
+        Args:
+          vc_class: a VersionControl subclass.
+          rev: the name of the revision to install.
+          extra_args: a list of extra options.
+        """
+        if extra_args is None:
+            extra_args = []
+
+        self.extra_args = extra_args
+        self.rev = rev
+        self.vc_class = vc_class
+
+    def __repr__(self):
+        return '<RevOptions {}: rev={!r}>'.format(self.vc_class.name, self.rev)
+
+    @property
+    def arg_rev(self):
+        # type: () -> Optional[str]
+        if self.rev is None:
+            return self.vc_class.default_arg_rev
+
+        return self.rev
+
+    def to_args(self):
+        # type: () -> List[str]
+        """
+        Return the VCS-specific command arguments.
+        """
+        args = []  # type: List[str]
+        rev = self.arg_rev
+        if rev is not None:
+            args += self.vc_class.get_base_rev_args(rev)
+        args += self.extra_args
+
+        return args
+
+    def to_display(self):
+        # type: () -> str
+        if not self.rev:
+            return ''
+
+        return ' (to revision {})'.format(self.rev)
+
+    def make_new(self, rev):
+        # type: (str) -> RevOptions
+        """
+        Make a copy of the current instance, but with a new rev.
+
+        Args:
+          rev: the name of the revision for the new object.
+        """
+        return self.vc_class.make_rev_options(rev, extra_args=self.extra_args)
+
+
+class VcsSupport(object):
+    _registry = {}  # type: Dict[str, VersionControl]
+    schemes = ['ssh', 'git', 'hg', 'bzr', 'sftp', 'svn']
+
+    def __init__(self):
+        # type: () -> None
+        # Register more schemes with urlparse for various version control
+        # systems
+        urllib_parse.uses_netloc.extend(self.schemes)
+        # Python >= 2.7.4, 3.3 doesn't have uses_fragment
+        if getattr(urllib_parse, 'uses_fragment', None):
+            urllib_parse.uses_fragment.extend(self.schemes)
+        super(VcsSupport, self).__init__()
+
+    def __iter__(self):
+        return self._registry.__iter__()
+
+    @property
+    def backends(self):
+        # type: () -> List[VersionControl]
+        return list(self._registry.values())
+
+    @property
+    def dirnames(self):
+        # type: () -> List[str]
+        return [backend.dirname for backend in self.backends]
+
+    @property
+    def all_schemes(self):
+        # type: () -> List[str]
+        schemes = []  # type: List[str]
+        for backend in self.backends:
+            schemes.extend(backend.schemes)
+        return schemes
+
+    def register(self, cls):
+        # type: (Type[VersionControl]) -> None
+        if not hasattr(cls, 'name'):
+            logger.warning('Cannot register VCS %s', cls.__name__)
+            return
+        if cls.name not in self._registry:
+            self._registry[cls.name] = cls()
+            logger.debug('Registered VCS backend: %s', cls.name)
+
+    def unregister(self, name):
+        # type: (str) -> None
+        if name in self._registry:
+            del self._registry[name]
+
+    def get_backend_for_dir(self, location):
+        # type: (str) -> Optional[VersionControl]
+        """
+        Return a VersionControl object if a repository of that type is found
+        at the given directory.
+        """
+        for vcs_backend in self._registry.values():
+            if vcs_backend.controls_location(location):
+                logger.debug('Determine that %s uses VCS: %s',
+                             location, vcs_backend.name)
+                return vcs_backend
+        return None
+
+    def get_backend(self, name):
+        # type: (str) -> Optional[VersionControl]
+        """
+        Return a VersionControl object or None.
+        """
+        name = name.lower()
+        return self._registry.get(name)
+
+
+vcs = VcsSupport()
+
+
+class VersionControl(object):
+    name = ''
+    dirname = ''
+    repo_name = ''
+    # List of supported schemes for this Version Control
+    schemes = ()  # type: Tuple[str, ...]
+    # Iterable of environment variable names to pass to call_subprocess().
+    unset_environ = ()  # type: Tuple[str, ...]
+    default_arg_rev = None  # type: Optional[str]
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url):
+        """
+        Return whether the vcs prefix (e.g. "git+") should be added to a
+        repository's remote url when used in a requirement.
+        """
+        return not remote_url.lower().startswith('{}:'.format(cls.name))
+
+    @classmethod
+    def get_subdirectory(cls, repo_dir):
+        """
+        Return the path to setup.py, relative to the repo root.
+        """
+        return None
+
+    @classmethod
+    def get_requirement_revision(cls, repo_dir):
+        """
+        Return the revision string that should be used in a requirement.
+        """
+        return cls.get_revision(repo_dir)
+
+    @classmethod
+    def get_src_requirement(cls, repo_dir, project_name):
+        """
+        Return the requirement string to use to redownload the files
+        currently at the given repository directory.
+
+        Args:
+          project_name: the (unescaped) project name.
+
+        The return value has a form similar to the following:
+
+            {repository_url}@{revision}#egg={project_name}
+        """
+        repo_url = cls.get_remote_url(repo_dir)
+        if repo_url is None:
+            return None
+
+        if cls.should_add_vcs_url_prefix(repo_url):
+            repo_url = '{}+{}'.format(cls.name, repo_url)
+
+        revision = cls.get_requirement_revision(repo_dir)
+        subdir = cls.get_subdirectory(repo_dir)
+        req = make_vcs_requirement_url(repo_url, revision, project_name,
+                                       subdir=subdir)
+
+        return req
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        """
+        Return the base revision arguments for a vcs command.
+
+        Args:
+          rev: the name of a revision to install.  Cannot be None.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def make_rev_options(cls, rev=None, extra_args=None):
+        # type: (Optional[str], Optional[List[str]]) -> RevOptions
+        """
+        Return a RevOptions object.
+
+        Args:
+          rev: the name of a revision to install.
+          extra_args: a list of extra options.
+        """
+        return RevOptions(cls, rev, extra_args=extra_args)
+
+    @classmethod
+    def _is_local_repository(cls, repo):
+        # type: (str) -> bool
+        """
+           posix absolute paths start with os.path.sep,
+           win32 ones start with drive (like c:\\folder)
+        """
+        drive, tail = os.path.splitdrive(repo)
+        return repo.startswith(os.path.sep) or bool(drive)
+
+    def export(self, location, url):
+        """
+        Export the repository at the url to the destination location
+        i.e. only download the files, without vcs informations
+
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def get_netloc_and_auth(cls, netloc, scheme):
+        """
+        Parse the repository URL's netloc, and return the new netloc to use
+        along with auth information.
+
+        Args:
+          netloc: the original repository URL netloc.
+          scheme: the repository URL's scheme without the vcs prefix.
+
+        This is mainly for the Subversion class to override, so that auth
+        information can be provided via the --username and --password options
+        instead of through the URL.  For other subclasses like Git without
+        such an option, auth information must stay in the URL.
+
+        Returns: (netloc, (username, password)).
+        """
+        return netloc, (None, None)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
+        """
+        Parse the repository URL to use, and return the URL, revision,
+        and auth info to use.
+
+        Returns: (url, rev, (username, password)).
+        """
+        scheme, netloc, path, query, frag = urllib_parse.urlsplit(url)
+        if '+' not in scheme:
+            raise ValueError(
+                "Sorry, {!r} is a malformed VCS url. "
+                "The format is <vcs>+<protocol>://<url>, "
+                "e.g. svn+http://myrepo/svn/MyApp#egg=MyApp".format(url)
+            )
+        # Remove the vcs prefix.
+        scheme = scheme.split('+', 1)[1]
+        netloc, user_pass = cls.get_netloc_and_auth(netloc, scheme)
+        rev = None
+        if '@' in path:
+            path, rev = path.rsplit('@', 1)
+        url = urllib_parse.urlunsplit((scheme, netloc, path, query, ''))
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(username, password):
+        """
+        Return the RevOptions "extra arguments" to use in obtain().
+        """
+        return []
+
+    def get_url_rev_options(self, url):
+        # type: (str) -> Tuple[str, RevOptions]
+        """
+        Return the URL and RevOptions object to use in obtain() and in
+        some cases export(), as a tuple (url, rev_options).
+        """
+        url, rev, user_pass = self.get_url_rev_and_auth(url)
+        username, password = user_pass
+        extra_args = self.make_rev_args(username, password)
+        rev_options = self.make_rev_options(rev, extra_args=extra_args)
+
+        return url, rev_options
+
+    @staticmethod
+    def normalize_url(url):
+        # type: (str) -> str
+        """
+        Normalize a URL for comparison by unquoting it and removing any
+        trailing slash.
+        """
+        return urllib_parse.unquote(url).rstrip('/')
+
+    @classmethod
+    def compare_urls(cls, url1, url2):
+        # type: (str, str) -> bool
+        """
+        Compare two repo URLs for identity, ignoring incidental differences.
+        """
+        return (cls.normalize_url(url1) == cls.normalize_url(url2))
+
+    def fetch_new(self, dest, url, rev_options):
+        """
+        Fetch a revision from a repository, in the case that this is the
+        first fetch from the repository.
+
+        Args:
+          dest: the directory to fetch the repository to.
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    def switch(self, dest, url, rev_options):
+        """
+        Switch the repo at ``dest`` to point to ``URL``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    def update(self, dest, url, rev_options):
+        """
+        Update an already-existing repo to the given ``rev_options``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """
+        Return whether the id of the current commit equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        raise NotImplementedError
+
+    def obtain(self, dest, url):
+        # type: (str, str) -> None
+        """
+        Install or update in editable mode the package represented by this
+        VersionControl object.
+
+        :param dest: the repository directory in which to install or update.
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        url, rev_options = self.get_url_rev_options(url)
+
+        if not os.path.exists(dest):
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        rev_display = rev_options.to_display()
+        if self.is_repository_directory(dest):
+            existing_url = self.get_remote_url(dest)
+            if self.compare_urls(existing_url, url):
+                logger.debug(
+                    '%s in %s exists, and has correct URL (%s)',
+                    self.repo_name.title(),
+                    display_path(dest),
+                    url,
+                )
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    logger.info(
+                        'Updating %s %s%s',
+                        display_path(dest),
+                        self.repo_name,
+                        rev_display,
+                    )
+                    self.update(dest, url, rev_options)
+                else:
+                    logger.info('Skipping because already up-to-date.')
+                return
+
+            logger.warning(
+                '%s %s in %s exists with URL %s',
+                self.name,
+                self.repo_name,
+                display_path(dest),
+                existing_url,
+            )
+            prompt = ('(s)witch, (i)gnore, (w)ipe, (b)ackup ',
+                      ('s', 'i', 'w', 'b'))
+        else:
+            logger.warning(
+                'Directory %s already exists, and is not a %s %s.',
+                dest,
+                self.name,
+                self.repo_name,
+            )
+            # https://github.com/python/mypy/issues/1174
+            prompt = ('(i)gnore, (w)ipe, (b)ackup ',  # type: ignore
+                      ('i', 'w', 'b'))
+
+        logger.warning(
+            'The plan is to install the %s repository %s',
+            self.name,
+            url,
+        )
+        response = ask_path_exists('What to do?  %s' % prompt[0], prompt[1])
+
+        if response == 'a':
+            sys.exit(-1)
+
+        if response == 'w':
+            logger.warning('Deleting %s', display_path(dest))
+            rmtree(dest)
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        if response == 'b':
+            dest_dir = backup_dir(dest)
+            logger.warning(
+                'Backing up %s to %s', display_path(dest), dest_dir,
+            )
+            shutil.move(dest, dest_dir)
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        # Do nothing if the response is "i".
+        if response == 's':
+            logger.info(
+                'Switching %s %s to %s%s',
+                self.repo_name,
+                display_path(dest),
+                url,
+                rev_display,
+            )
+            self.switch(dest, url, rev_options)
+
+    def unpack(self, location, url):
+        # type: (str, str) -> None
+        """
+        Clean up current location and download the url repository
+        (and vcs infos) into location
+
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        if os.path.exists(location):
+            rmtree(location)
+        self.obtain(location, url=url)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        """
+        Return the url used at location
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def get_revision(cls, location):
+        """
+        Return the current commit id of the files at the given location.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def run_command(
+        cls,
+        cmd,  # type: List[str]
+        show_stdout=True,  # type: bool
+        cwd=None,  # type: Optional[str]
+        on_returncode='raise',  # type: str
+        extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
+        command_desc=None,  # type: Optional[str]
+        extra_environ=None,  # type: Optional[Mapping[str, Any]]
+        spinner=None  # type: Optional[SpinnerInterface]
+    ):
+        # type: (...) -> Text
+        """
+        Run a VCS subcommand
+        This is simply a wrapper around call_subprocess that adds the VCS
+        command name, and checks that the VCS is available
+        """
+        cmd = [cls.name] + cmd
+        try:
+            return call_subprocess(cmd, show_stdout, cwd,
+                                   on_returncode=on_returncode,
+                                   extra_ok_returncodes=extra_ok_returncodes,
+                                   command_desc=command_desc,
+                                   extra_environ=extra_environ,
+                                   unset_environ=cls.unset_environ,
+                                   spinner=spinner)
+        except OSError as e:
+            # errno.ENOENT = no such file or directory
+            # In other words, the VCS executable isn't available
+            if e.errno == errno.ENOENT:
+                raise BadCommand(
+                    'Cannot find command %r - do you have '
+                    '%r installed and in your '
+                    'PATH?' % (cls.name, cls.name))
+            else:
+                raise  # re-raise exception if a different error occurred
+
+    @classmethod
+    def is_repository_directory(cls, path):
+        # type: (str) -> bool
+        """
+        Return whether a directory path is a repository directory.
+        """
+        logger.debug('Checking in %s for %s (%s)...',
+                     path, cls.dirname, cls.name)
+        return os.path.exists(os.path.join(path, cls.dirname))
+
+    @classmethod
+    def controls_location(cls, location):
+        # type: (str) -> bool
+        """
+        Check if a location is controlled by the vcs.
+        It is meant to be overridden to implement smarter detection
+        mechanisms for specific vcs.
+
+        This can do more than is_repository_directory() alone.  For example,
+        the Git override checks that Git is actually available.
+        """
+        return cls.is_repository_directory(location)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/wheel.py
new file mode 100644
index 00000000..6f034cd0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_internal/wheel.py
@@ -0,0 +1,1125 @@
+"""
+Support for installing and building the "wheel" binary package format.
+"""
+from __future__ import absolute_import
+
+import collections
+import compileall
+import csv
+import hashlib
+import logging
+import os.path
+import re
+import shutil
+import stat
+import sys
+import warnings
+from base64 import urlsafe_b64encode
+from email.parser import Parser
+
+from pip._vendor import pkg_resources
+from pip._vendor.distlib.scripts import ScriptMaker
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.six import StringIO
+
+from pip._internal import pep425tags
+from pip._internal.download import unpack_url
+from pip._internal.exceptions import (
+    InstallationError, InvalidWheelFilename, UnsupportedWheel,
+)
+from pip._internal.locations import distutils_scheme
+from pip._internal.models.link import Link
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.marker_files import PIP_DELETE_MARKER_FILENAME
+from pip._internal.utils.misc import (
+    LOG_DIVIDER, call_subprocess, captured_stdout, ensure_dir,
+    format_command_args, path_to_url, read_chunks,
+)
+from pip._internal.utils.setuptools_build import make_setuptools_shim_args
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.ui import open_spinner
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Dict, List, Optional, Sequence, Mapping, Tuple, IO, Text, Any, Iterable
+    )
+    from pip._vendor.packaging.requirements import Requirement
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.download import PipSession
+    from pip._internal.index import FormatControl, PackageFinder
+    from pip._internal.operations.prepare import (
+        RequirementPreparer
+    )
+    from pip._internal.cache import WheelCache
+    from pip._internal.pep425tags import Pep425Tag
+
+    InstalledCSVRow = Tuple[str, ...]
+
+
+VERSION_COMPATIBLE = (1, 0)
+
+
+logger = logging.getLogger(__name__)
+
+
+def normpath(src, p):
+    return os.path.relpath(src, p).replace(os.path.sep, '/')
+
+
+def hash_file(path, blocksize=1 << 20):
+    # type: (str, int) -> Tuple[Any, int]
+    """Return (hash, length) for path using hashlib.sha256()"""
+    h = hashlib.sha256()
+    length = 0
+    with open(path, 'rb') as f:
+        for block in read_chunks(f, size=blocksize):
+            length += len(block)
+            h.update(block)
+    return (h, length)  # type: ignore
+
+
+def rehash(path, blocksize=1 << 20):
+    # type: (str, int) -> Tuple[str, str]
+    """Return (encoded_digest, length) for path using hashlib.sha256()"""
+    h, length = hash_file(path, blocksize)
+    digest = 'sha256=' + urlsafe_b64encode(
+        h.digest()
+    ).decode('latin1').rstrip('=')
+    # unicode/str python2 issues
+    return (digest, str(length))  # type: ignore
+
+
+def open_for_csv(name, mode):
+    # type: (str, Text) -> IO
+    if sys.version_info[0] < 3:
+        nl = {}  # type: Dict[str, Any]
+        bin = 'b'
+    else:
+        nl = {'newline': ''}  # type: Dict[str, Any]
+        bin = ''
+    return open(name, mode + bin, **nl)
+
+
+def replace_python_tag(wheelname, new_tag):
+    # type: (str, str) -> str
+    """Replace the Python tag in a wheel file name with a new value.
+    """
+    parts = wheelname.split('-')
+    parts[-3] = new_tag
+    return '-'.join(parts)
+
+
+def fix_script(path):
+    # type: (str) -> Optional[bool]
+    """Replace #!python with #!/path/to/python
+    Return True if file was changed."""
+    # XXX RECORD hashes will need to be updated
+    if os.path.isfile(path):
+        with open(path, 'rb') as script:
+            firstline = script.readline()
+            if not firstline.startswith(b'#!python'):
+                return False
+            exename = sys.executable.encode(sys.getfilesystemencoding())
+            firstline = b'#!' + exename + os.linesep.encode("ascii")
+            rest = script.read()
+        with open(path, 'wb') as script:
+            script.write(firstline)
+            script.write(rest)
+        return True
+    return None
+
+
+dist_info_re = re.compile(r"""^(?P<namever>(?P<name>.+?)(-(?P<ver>.+?))?)
+                                \.dist-info$""", re.VERBOSE)
+
+
+def root_is_purelib(name, wheeldir):
+    # type: (str, str) -> bool
+    """
+    Return True if the extracted wheel in wheeldir should go into purelib.
+    """
+    name_folded = name.replace("-", "_")
+    for item in os.listdir(wheeldir):
+        match = dist_info_re.match(item)
+        if match and match.group('name') == name_folded:
+            with open(os.path.join(wheeldir, item, 'WHEEL')) as wheel:
+                for line in wheel:
+                    line = line.lower().rstrip()
+                    if line == "root-is-purelib: true":
+                        return True
+    return False
+
+
+def get_entrypoints(filename):
+    # type: (str) -> Tuple[Dict[str, str], Dict[str, str]]
+    if not os.path.exists(filename):
+        return {}, {}
+
+    # This is done because you can pass a string to entry_points wrappers which
+    # means that they may or may not be valid INI files. The attempt here is to
+    # strip leading and trailing whitespace in order to make them valid INI
+    # files.
+    with open(filename) as fp:
+        data = StringIO()
+        for line in fp:
+            data.write(line.strip())
+            data.write("\n")
+        data.seek(0)
+
+    # get the entry points and then the script names
+    entry_points = pkg_resources.EntryPoint.parse_map(data)
+    console = entry_points.get('console_scripts', {})
+    gui = entry_points.get('gui_scripts', {})
+
+    def _split_ep(s):
+        """get the string representation of EntryPoint, remove space and split
+        on '='"""
+        return str(s).replace(" ", "").split("=")
+
+    # convert the EntryPoint objects into strings with module:function
+    console = dict(_split_ep(v) for v in console.values())
+    gui = dict(_split_ep(v) for v in gui.values())
+    return console, gui
+
+
+def message_about_scripts_not_on_PATH(scripts):
+    # type: (Sequence[str]) -> Optional[str]
+    """Determine if any scripts are not on PATH and format a warning.
+
+    Returns a warning message if one or more scripts are not on PATH,
+    otherwise None.
+    """
+    if not scripts:
+        return None
+
+    # Group scripts by the path they were installed in
+    grouped_by_dir = collections.defaultdict(set)  # type: Dict[str, set]
+    for destfile in scripts:
+        parent_dir = os.path.dirname(destfile)
+        script_name = os.path.basename(destfile)
+        grouped_by_dir[parent_dir].add(script_name)
+
+    # We don't want to warn for directories that are on PATH.
+    not_warn_dirs = [
+        os.path.normcase(i).rstrip(os.sep) for i in
+        os.environ.get("PATH", "").split(os.pathsep)
+    ]
+    # If an executable sits with sys.executable, we don't warn for it.
+    #     This covers the case of venv invocations without activating the venv.
+    not_warn_dirs.append(os.path.normcase(os.path.dirname(sys.executable)))
+    warn_for = {
+        parent_dir: scripts for parent_dir, scripts in grouped_by_dir.items()
+        if os.path.normcase(parent_dir) not in not_warn_dirs
+    }
+    if not warn_for:
+        return None
+
+    # Format a message
+    msg_lines = []
+    for parent_dir, scripts in warn_for.items():
+        sorted_scripts = sorted(scripts)  # type: List[str]
+        if len(sorted_scripts) == 1:
+            start_text = "script {} is".format(sorted_scripts[0])
+        else:
+            start_text = "scripts {} are".format(
+                ", ".join(sorted_scripts[:-1]) + " and " + sorted_scripts[-1]
+            )
+
+        msg_lines.append(
+            "The {} installed in '{}' which is not on PATH."
+            .format(start_text, parent_dir)
+        )
+
+    last_line_fmt = (
+        "Consider adding {} to PATH or, if you prefer "
+        "to suppress this warning, use --no-warn-script-location."
+    )
+    if len(msg_lines) == 1:
+        msg_lines.append(last_line_fmt.format("this directory"))
+    else:
+        msg_lines.append(last_line_fmt.format("these directories"))
+
+    # Returns the formatted multiline message
+    return "\n".join(msg_lines)
+
+
+def sorted_outrows(outrows):
+    # type: (Iterable[InstalledCSVRow]) -> List[InstalledCSVRow]
+    """
+    Return the given rows of a RECORD file in sorted order.
+
+    Each row is a 3-tuple (path, hash, size) and corresponds to a record of
+    a RECORD file (see PEP 376 and PEP 427 for details).  For the rows
+    passed to this function, the size can be an integer as an int or string,
+    or the empty string.
+    """
+    # Normally, there should only be one row per path, in which case the
+    # second and third elements don't come into play when sorting.
+    # However, in cases in the wild where a path might happen to occur twice,
+    # we don't want the sort operation to trigger an error (but still want
+    # determinism).  Since the third element can be an int or string, we
+    # coerce each element to a string to avoid a TypeError in this case.
+    # For additional background, see--
+    # https://github.com/pypa/pip/issues/5868
+    return sorted(outrows, key=lambda row: tuple(str(x) for x in row))
+
+
+def get_csv_rows_for_installed(
+    old_csv_rows,  # type: Iterable[List[str]]
+    installed,  # type: Dict[str, str]
+    changed,  # type: set
+    generated,  # type: List[str]
+    lib_dir,  # type: str
+):
+    # type: (...) -> List[InstalledCSVRow]
+    """
+    :param installed: A map from archive RECORD path to installation RECORD
+        path.
+    """
+    installed_rows = []  # type: List[InstalledCSVRow]
+    for row in old_csv_rows:
+        if len(row) > 3:
+            logger.warning(
+                'RECORD line has more than three elements: {}'.format(row)
+            )
+        # Make a copy because we are mutating the row.
+        row = list(row)
+        old_path = row[0]
+        new_path = installed.pop(old_path, old_path)
+        row[0] = new_path
+        if new_path in changed:
+            digest, length = rehash(new_path)
+            row[1] = digest
+            row[2] = length
+        installed_rows.append(tuple(row))
+    for f in generated:
+        digest, length = rehash(f)
+        installed_rows.append((normpath(f, lib_dir), digest, str(length)))
+    for f in installed:
+        installed_rows.append((installed[f], '', ''))
+    return installed_rows
+
+
+def move_wheel_files(
+    name,  # type: str
+    req,  # type: Requirement
+    wheeldir,  # type: str
+    user=False,  # type: bool
+    home=None,  # type: Optional[str]
+    root=None,  # type: Optional[str]
+    pycompile=True,  # type: bool
+    scheme=None,  # type: Optional[Mapping[str, str]]
+    isolated=False,  # type: bool
+    prefix=None,  # type: Optional[str]
+    warn_script_location=True  # type: bool
+):
+    # type: (...) -> None
+    """Install a wheel"""
+    # TODO: Investigate and break this up.
+    # TODO: Look into moving this into a dedicated class for representing an
+    #       installation.
+
+    if not scheme:
+        scheme = distutils_scheme(
+            name, user=user, home=home, root=root, isolated=isolated,
+            prefix=prefix,
+        )
+
+    if root_is_purelib(name, wheeldir):
+        lib_dir = scheme['purelib']
+    else:
+        lib_dir = scheme['platlib']
+
+    info_dir = []  # type: List[str]
+    data_dirs = []
+    source = wheeldir.rstrip(os.path.sep) + os.path.sep
+
+    # Record details of the files moved
+    #   installed = files copied from the wheel to the destination
+    #   changed = files changed while installing (scripts #! line typically)
+    #   generated = files newly generated during the install (script wrappers)
+    installed = {}  # type: Dict[str, str]
+    changed = set()
+    generated = []  # type: List[str]
+
+    # Compile all of the pyc files that we're going to be installing
+    if pycompile:
+        with captured_stdout() as stdout:
+            with warnings.catch_warnings():
+                warnings.filterwarnings('ignore')
+                compileall.compile_dir(source, force=True, quiet=True)
+        logger.debug(stdout.getvalue())
+
+    def record_installed(srcfile, destfile, modified=False):
+        """Map archive RECORD paths to installation RECORD paths."""
+        oldpath = normpath(srcfile, wheeldir)
+        newpath = normpath(destfile, lib_dir)
+        installed[oldpath] = newpath
+        if modified:
+            changed.add(destfile)
+
+    def clobber(source, dest, is_base, fixer=None, filter=None):
+        ensure_dir(dest)  # common for the 'include' path
+
+        for dir, subdirs, files in os.walk(source):
+            basedir = dir[len(source):].lstrip(os.path.sep)
+            destdir = os.path.join(dest, basedir)
+            if is_base and basedir.split(os.path.sep, 1)[0].endswith('.data'):
+                continue
+            for s in subdirs:
+                destsubdir = os.path.join(dest, basedir, s)
+                if is_base and basedir == '' and destsubdir.endswith('.data'):
+                    data_dirs.append(s)
+                    continue
+                elif (is_base and
+                        s.endswith('.dist-info') and
+                        canonicalize_name(s).startswith(
+                            canonicalize_name(req.name))):
+                    assert not info_dir, ('Multiple .dist-info directories: ' +
+                                          destsubdir + ', ' +
+                                          ', '.join(info_dir))
+                    info_dir.append(destsubdir)
+            for f in files:
+                # Skip unwanted files
+                if filter and filter(f):
+                    continue
+                srcfile = os.path.join(dir, f)
+                destfile = os.path.join(dest, basedir, f)
+                # directory creation is lazy and after the file filtering above
+                # to ensure we don't install empty dirs; empty dirs can't be
+                # uninstalled.
+                ensure_dir(destdir)
+
+                # copyfile (called below) truncates the destination if it
+                # exists and then writes the new contents. This is fine in most
+                # cases, but can cause a segfault if pip has loaded a shared
+                # object (e.g. from pyopenssl through its vendored urllib3)
+                # Since the shared object is mmap'd an attempt to call a
+                # symbol in it will then cause a segfault. Unlinking the file
+                # allows writing of new contents while allowing the process to
+                # continue to use the old copy.
+                if os.path.exists(destfile):
+                    os.unlink(destfile)
+
+                # We use copyfile (not move, copy, or copy2) to be extra sure
+                # that we are not moving directories over (copyfile fails for
+                # directories) as well as to ensure that we are not copying
+                # over any metadata because we want more control over what
+                # metadata we actually copy over.
+                shutil.copyfile(srcfile, destfile)
+
+                # Copy over the metadata for the file, currently this only
+                # includes the atime and mtime.
+                st = os.stat(srcfile)
+                if hasattr(os, "utime"):
+                    os.utime(destfile, (st.st_atime, st.st_mtime))
+
+                # If our file is executable, then make our destination file
+                # executable.
+                if os.access(srcfile, os.X_OK):
+                    st = os.stat(srcfile)
+                    permissions = (
+                        st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
+                    )
+                    os.chmod(destfile, permissions)
+
+                changed = False
+                if fixer:
+                    changed = fixer(destfile)
+                record_installed(srcfile, destfile, changed)
+
+    clobber(source, lib_dir, True)
+
+    assert info_dir, "%s .dist-info directory not found" % req
+
+    # Get the defined entry points
+    ep_file = os.path.join(info_dir[0], 'entry_points.txt')
+    console, gui = get_entrypoints(ep_file)
+
+    def is_entrypoint_wrapper(name):
+        # EP, EP.exe and EP-script.py are scripts generated for
+        # entry point EP by setuptools
+        if name.lower().endswith('.exe'):
+            matchname = name[:-4]
+        elif name.lower().endswith('-script.py'):
+            matchname = name[:-10]
+        elif name.lower().endswith(".pya"):
+            matchname = name[:-4]
+        else:
+            matchname = name
+        # Ignore setuptools-generated scripts
+        return (matchname in console or matchname in gui)
+
+    for datadir in data_dirs:
+        fixer = None
+        filter = None
+        for subdir in os.listdir(os.path.join(wheeldir, datadir)):
+            fixer = None
+            if subdir == 'scripts':
+                fixer = fix_script
+                filter = is_entrypoint_wrapper
+            source = os.path.join(wheeldir, datadir, subdir)
+            dest = scheme[subdir]
+            clobber(source, dest, False, fixer=fixer, filter=filter)
+
+    maker = ScriptMaker(None, scheme['scripts'])
+
+    # Ensure old scripts are overwritten.
+    # See https://github.com/pypa/pip/issues/1800
+    maker.clobber = True
+
+    # Ensure we don't generate any variants for scripts because this is almost
+    # never what somebody wants.
+    # See https://bitbucket.org/pypa/distlib/issue/35/
+    maker.variants = {''}
+
+    # This is required because otherwise distlib creates scripts that are not
+    # executable.
+    # See https://bitbucket.org/pypa/distlib/issue/32/
+    maker.set_mode = True
+
+    # Simplify the script and fix the fact that the default script swallows
+    # every single stack trace.
+    # See https://bitbucket.org/pypa/distlib/issue/34/
+    # See https://bitbucket.org/pypa/distlib/issue/33/
+    def _get_script_text(entry):
+        if entry.suffix is None:
+            raise InstallationError(
+                "Invalid script entry point: %s for req: %s - A callable "
+                "suffix is required. Cf https://packaging.python.org/en/"
+                "latest/distributing.html#console-scripts for more "
+                "information." % (entry, req)
+            )
+        return maker.script_template % {
+            "module": entry.prefix,
+            "import_name": entry.suffix.split(".")[0],
+            "func": entry.suffix,
+        }
+    # ignore type, because mypy disallows assigning to a method,
+    # see https://github.com/python/mypy/issues/2427
+    maker._get_script_text = _get_script_text  # type: ignore
+    maker.script_template = r"""# -*- coding: utf-8 -*-
+import re
+import sys
+
+from %(module)s import %(import_name)s
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(%(func)s())
+"""
+
+    # Special case pip and setuptools to generate versioned wrappers
+    #
+    # The issue is that some projects (specifically, pip and setuptools) use
+    # code in setup.py to create "versioned" entry points - pip2.7 on Python
+    # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
+    # the wheel metadata at build time, and so if the wheel is installed with
+    # a *different* version of Python the entry points will be wrong. The
+    # correct fix for this is to enhance the metadata to be able to describe
+    # such versioned entry points, but that won't happen till Metadata 2.0 is
+    # available.
+    # In the meantime, projects using versioned entry points will either have
+    # incorrect versioned entry points, or they will not be able to distribute
+    # "universal" wheels (i.e., they will need a wheel per Python version).
+    #
+    # Because setuptools and pip are bundled with _ensurepip and virtualenv,
+    # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
+    # override the versioned entry points in the wheel and generate the
+    # correct ones. This code is purely a short-term measure until Metadata 2.0
+    # is available.
+    #
+    # To add the level of hack in this section of code, in order to support
+    # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
+    # variable which will control which version scripts get installed.
+    #
+    # ENSUREPIP_OPTIONS=altinstall
+    #   - Only pipX.Y and easy_install-X.Y will be generated and installed
+    # ENSUREPIP_OPTIONS=install
+    #   - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
+    #     that this option is technically if ENSUREPIP_OPTIONS is set and is
+    #     not altinstall
+    # DEFAULT
+    #   - The default behavior is to install pip, pipX, pipX.Y, easy_install
+    #     and easy_install-X.Y.
+    pip_script = console.pop('pip', None)
+    if pip_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            spec = 'pip = ' + pip_script
+            generated.extend(maker.make(spec))
+
+        if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
+            spec = 'pip%s = %s' % (sys.version[:1], pip_script)
+            generated.extend(maker.make(spec))
+
+        spec = 'pip%s = %s' % (sys.version[:3], pip_script)
+        generated.extend(maker.make(spec))
+        # Delete any other versioned pip entry points
+        pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
+        for k in pip_ep:
+            del console[k]
+    easy_install_script = console.pop('easy_install', None)
+    if easy_install_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            spec = 'easy_install = ' + easy_install_script
+            generated.extend(maker.make(spec))
+
+        spec = 'easy_install-%s = %s' % (sys.version[:3], easy_install_script)
+        generated.extend(maker.make(spec))
+        # Delete any other versioned easy_install entry points
+        easy_install_ep = [
+            k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
+        ]
+        for k in easy_install_ep:
+            del console[k]
+
+    # Generate the console and GUI entry points specified in the wheel
+    if len(console) > 0:
+        generated_console_scripts = maker.make_multiple(
+            ['%s = %s' % kv for kv in console.items()]
+        )
+        generated.extend(generated_console_scripts)
+
+        if warn_script_location:
+            msg = message_about_scripts_not_on_PATH(generated_console_scripts)
+            if msg is not None:
+                logger.warning(msg)
+
+    if len(gui) > 0:
+        generated.extend(
+            maker.make_multiple(
+                ['%s = %s' % kv for kv in gui.items()],
+                {'gui': True}
+            )
+        )
+
+    # Record pip as the installer
+    installer = os.path.join(info_dir[0], 'INSTALLER')
+    temp_installer = os.path.join(info_dir[0], 'INSTALLER.pip')
+    with open(temp_installer, 'wb') as installer_file:
+        installer_file.write(b'pip\n')
+    shutil.move(temp_installer, installer)
+    generated.append(installer)
+
+    # Record details of all files installed
+    record = os.path.join(info_dir[0], 'RECORD')
+    temp_record = os.path.join(info_dir[0], 'RECORD.pip')
+    with open_for_csv(record, 'r') as record_in:
+        with open_for_csv(temp_record, 'w+') as record_out:
+            reader = csv.reader(record_in)
+            outrows = get_csv_rows_for_installed(
+                reader, installed=installed, changed=changed,
+                generated=generated, lib_dir=lib_dir,
+            )
+            writer = csv.writer(record_out)
+            # Sort to simplify testing.
+            for row in sorted_outrows(outrows):
+                writer.writerow(row)
+    shutil.move(temp_record, record)
+
+
+def wheel_version(source_dir):
+    # type: (Optional[str]) -> Optional[Tuple[int, ...]]
+    """
+    Return the Wheel-Version of an extracted wheel, if possible.
+
+    Otherwise, return None if we couldn't parse / extract it.
+    """
+    try:
+        dist = [d for d in pkg_resources.find_on_path(None, source_dir)][0]
+
+        wheel_data = dist.get_metadata('WHEEL')
+        wheel_data = Parser().parsestr(wheel_data)
+
+        version = wheel_data['Wheel-Version'].strip()
+        version = tuple(map(int, version.split('.')))
+        return version
+    except Exception:
+        return None
+
+
+def check_compatibility(version, name):
+    # type: (Optional[Tuple[int, ...]], str) -> None
+    """
+    Raises errors or warns if called with an incompatible Wheel-Version.
+
+    Pip should refuse to install a Wheel-Version that's a major series
+    ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
+    installing a version only minor version ahead (e.g 1.2 > 1.1).
+
+    version: a 2-tuple representing a Wheel-Version (Major, Minor)
+    name: name of wheel or package to raise exception about
+
+    :raises UnsupportedWheel: when an incompatible Wheel-Version is given
+    """
+    if not version:
+        raise UnsupportedWheel(
+            "%s is in an unsupported or invalid wheel" % name
+        )
+    if version[0] > VERSION_COMPATIBLE[0]:
+        raise UnsupportedWheel(
+            "%s's Wheel-Version (%s) is not compatible with this version "
+            "of pip" % (name, '.'.join(map(str, version)))
+        )
+    elif version > VERSION_COMPATIBLE:
+        logger.warning(
+            'Installing from a newer Wheel-Version (%s)',
+            '.'.join(map(str, version)),
+        )
+
+
+def format_tag(file_tag):
+    # type: (Tuple[str, ...]) -> str
+    """
+    Format three tags in the form "<python_tag>-<abi_tag>-<platform_tag>".
+
+    :param file_tag: A 3-tuple of tags (python_tag, abi_tag, platform_tag).
+    """
+    return '-'.join(file_tag)
+
+
+class Wheel(object):
+    """A wheel file"""
+
+    # TODO: Maybe move the class into the models sub-package
+    # TODO: Maybe move the install code into this class
+
+    wheel_file_re = re.compile(
+        r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.*?))
+        ((-(?P<build>\d[^-]*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
+        \.whl|\.dist-info)$""",
+        re.VERBOSE
+    )
+
+    def __init__(self, filename):
+        # type: (str) -> None
+        """
+        :raises InvalidWheelFilename: when the filename is invalid for a wheel
+        """
+        wheel_info = self.wheel_file_re.match(filename)
+        if not wheel_info:
+            raise InvalidWheelFilename(
+                "%s is not a valid wheel filename." % filename
+            )
+        self.filename = filename
+        self.name = wheel_info.group('name').replace('_', '-')
+        # we'll assume "_" means "-" due to wheel naming scheme
+        # (https://github.com/pypa/pip/issues/1150)
+        self.version = wheel_info.group('ver').replace('_', '-')
+        self.build_tag = wheel_info.group('build')
+        self.pyversions = wheel_info.group('pyver').split('.')
+        self.abis = wheel_info.group('abi').split('.')
+        self.plats = wheel_info.group('plat').split('.')
+
+        # All the tag combinations from this file
+        self.file_tags = {
+            (x, y, z) for x in self.pyversions
+            for y in self.abis for z in self.plats
+        }
+
+    def get_formatted_file_tags(self):
+        # type: () -> List[str]
+        """
+        Return the wheel's tags as a sorted list of strings.
+        """
+        return sorted(format_tag(tag) for tag in self.file_tags)
+
+    def support_index_min(self, tags=None):
+        # type: (Optional[List[Pep425Tag]]) -> Optional[int]
+        """
+        Return the lowest index that one of the wheel's file_tag combinations
+        achieves in the supported_tags list e.g. if there are 8 supported tags,
+        and one of the file tags is first in the list, then return 0.  Returns
+        None is the wheel is not supported.
+        """
+        if tags is None:  # for mock
+            tags = pep425tags.get_supported()
+        indexes = [tags.index(c) for c in self.file_tags if c in tags]
+        return min(indexes) if indexes else None
+
+    def supported(self, tags=None):
+        # type: (Optional[List[Pep425Tag]]) -> bool
+        """Is this wheel supported on this system?"""
+        if tags is None:  # for mock
+            tags = pep425tags.get_supported()
+        return bool(set(tags).intersection(self.file_tags))
+
+
+def _contains_egg_info(
+        s, _egg_info_re=re.compile(r'([a-z0-9_.]+)-([a-z0-9_.!+-]+)', re.I)):
+    """Determine whether the string looks like an egg_info.
+
+    :param s: The string to parse. E.g. foo-2.1
+    """
+    return bool(_egg_info_re.search(s))
+
+
+def should_use_ephemeral_cache(
+    req,  # type: InstallRequirement
+    format_control,  # type: FormatControl
+    autobuilding,  # type: bool
+    cache_available  # type: bool
+):
+    # type: (...) -> Optional[bool]
+    """
+    Return whether to build an InstallRequirement object using the
+    ephemeral cache.
+
+    :param cache_available: whether a cache directory is available for the
+        autobuilding=True case.
+
+    :return: True or False to build the requirement with ephem_cache=True
+        or False, respectively; or None not to build the requirement.
+    """
+    if req.constraint:
+        return None
+    if req.is_wheel:
+        if not autobuilding:
+            logger.info(
+                'Skipping %s, due to already being wheel.', req.name,
+            )
+        return None
+    if not autobuilding:
+        return False
+
+    if req.editable or not req.source_dir:
+        return None
+
+    if "binary" not in format_control.get_allowed_formats(
+            canonicalize_name(req.name)):
+        logger.info(
+            "Skipping bdist_wheel for %s, due to binaries "
+            "being disabled for it.", req.name,
+        )
+        return None
+
+    if req.link and not req.link.is_artifact:
+        # VCS checkout. Build wheel just for this run.
+        return True
+
+    link = req.link
+    base, ext = link.splitext()
+    if cache_available and _contains_egg_info(base):
+        return False
+
+    # Otherwise, build the wheel just for this run using the ephemeral
+    # cache since we are either in the case of e.g. a local directory, or
+    # no cache directory is available to use.
+    return True
+
+
+def format_command_result(
+    command_args,  # type: List[str]
+    command_output,  # type: str
+):
+    # type: (...) -> str
+    """
+    Format command information for logging.
+    """
+    command_desc = format_command_args(command_args)
+    text = 'Command arguments: {}\n'.format(command_desc)
+
+    if not command_output:
+        text += 'Command output: None'
+    elif logger.getEffectiveLevel() > logging.DEBUG:
+        text += 'Command output: [use --verbose to show]'
+    else:
+        if not command_output.endswith('\n'):
+            command_output += '\n'
+        text += 'Command output:\n{}{}'.format(command_output, LOG_DIVIDER)
+
+    return text
+
+
+def get_legacy_build_wheel_path(
+    names,  # type: List[str]
+    temp_dir,  # type: str
+    req,  # type: InstallRequirement
+    command_args,  # type: List[str]
+    command_output,  # type: str
+):
+    # type: (...) -> Optional[str]
+    """
+    Return the path to the wheel in the temporary build directory.
+    """
+    # Sort for determinism.
+    names = sorted(names)
+    if not names:
+        msg = (
+            'Legacy build of wheel for {!r} created no files.\n'
+        ).format(req.name)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+        return None
+
+    if len(names) > 1:
+        msg = (
+            'Legacy build of wheel for {!r} created more than one file.\n'
+            'Filenames (choosing first): {}\n'
+        ).format(req.name, names)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+
+    return os.path.join(temp_dir, names[0])
+
+
+class WheelBuilder(object):
+    """Build wheels from a RequirementSet."""
+
+    def __init__(
+        self,
+        finder,  # type: PackageFinder
+        preparer,  # type: RequirementPreparer
+        wheel_cache,  # type: WheelCache
+        build_options=None,  # type: Optional[List[str]]
+        global_options=None,  # type: Optional[List[str]]
+        no_clean=False  # type: bool
+    ):
+        # type: (...) -> None
+        self.finder = finder
+        self.preparer = preparer
+        self.wheel_cache = wheel_cache
+
+        self._wheel_dir = preparer.wheel_download_dir
+
+        self.build_options = build_options or []
+        self.global_options = global_options or []
+        self.no_clean = no_clean
+
+    def _build_one(self, req, output_dir, python_tag=None):
+        """Build one wheel.
+
+        :return: The filename of the built wheel, or None if the build failed.
+        """
+        # Install build deps into temporary directory (PEP 518)
+        with req.build_env:
+            return self._build_one_inside_env(req, output_dir,
+                                              python_tag=python_tag)
+
+    def _build_one_inside_env(self, req, output_dir, python_tag=None):
+        with TempDirectory(kind="wheel") as temp_dir:
+            if req.use_pep517:
+                builder = self._build_one_pep517
+            else:
+                builder = self._build_one_legacy
+            wheel_path = builder(req, temp_dir.path, python_tag=python_tag)
+            if wheel_path is not None:
+                wheel_name = os.path.basename(wheel_path)
+                dest_path = os.path.join(output_dir, wheel_name)
+                try:
+                    wheel_hash, length = hash_file(wheel_path)
+                    shutil.move(wheel_path, dest_path)
+                    logger.info('Created wheel for %s: '
+                                'filename=%s size=%d sha256=%s',
+                                req.name, wheel_name, length,
+                                wheel_hash.hexdigest())
+                    logger.info('Stored in directory: %s', output_dir)
+                    return dest_path
+                except Exception:
+                    pass
+            # Ignore return, we can't do anything else useful.
+            self._clean_one(req)
+            return None
+
+    def _base_setup_args(self, req):
+        # NOTE: Eventually, we'd want to also -S to the flags here, when we're
+        # isolating. Currently, it breaks Python in virtualenvs, because it
+        # relies on site.py to find parts of the standard library outside the
+        # virtualenv.
+        base_cmd = make_setuptools_shim_args(req.setup_py_path,
+                                             unbuffered_output=True)
+        return base_cmd + list(self.global_options)
+
+    def _build_one_pep517(self, req, tempd, python_tag=None):
+        """Build one InstallRequirement using the PEP 517 build process.
+
+        Returns path to wheel if successfully built. Otherwise, returns None.
+        """
+        assert req.metadata_directory is not None
+        if self.build_options:
+            # PEP 517 does not support --build-options
+            logger.error('Cannot build wheel for %s using PEP 517 when '
+                         '--build-options is present' % (req.name,))
+            return None
+        try:
+            req.spin_message = 'Building wheel for %s (PEP 517)' % (req.name,)
+            logger.debug('Destination directory: %s', tempd)
+            wheel_name = req.pep517_backend.build_wheel(
+                tempd,
+                metadata_directory=req.metadata_directory
+            )
+            if python_tag:
+                # General PEP 517 backends don't necessarily support
+                # a "--python-tag" option, so we rename the wheel
+                # file directly.
+                new_name = replace_python_tag(wheel_name, python_tag)
+                os.rename(
+                    os.path.join(tempd, wheel_name),
+                    os.path.join(tempd, new_name)
+                )
+                # Reassign to simplify the return at the end of function
+                wheel_name = new_name
+        except Exception:
+            logger.error('Failed building wheel for %s', req.name)
+            return None
+        return os.path.join(tempd, wheel_name)
+
+    def _build_one_legacy(self, req, tempd, python_tag=None):
+        """Build one InstallRequirement using the "legacy" build process.
+
+        Returns path to wheel if successfully built. Otherwise, returns None.
+        """
+        base_args = self._base_setup_args(req)
+
+        spin_message = 'Building wheel for %s (setup.py)' % (req.name,)
+        with open_spinner(spin_message) as spinner:
+            logger.debug('Destination directory: %s', tempd)
+            wheel_args = base_args + ['bdist_wheel', '-d', tempd] \
+                + self.build_options
+
+            if python_tag is not None:
+                wheel_args += ["--python-tag", python_tag]
+
+            try:
+                output = call_subprocess(wheel_args, cwd=req.setup_py_dir,
+                                         spinner=spinner)
+            except Exception:
+                spinner.finish("error")
+                logger.error('Failed building wheel for %s', req.name)
+                return None
+            names = os.listdir(tempd)
+            wheel_path = get_legacy_build_wheel_path(
+                names=names,
+                temp_dir=tempd,
+                req=req,
+                command_args=wheel_args,
+                command_output=output,
+            )
+            return wheel_path
+
+    def _clean_one(self, req):
+        base_args = self._base_setup_args(req)
+
+        logger.info('Running setup.py clean for %s', req.name)
+        clean_args = base_args + ['clean', '--all']
+        try:
+            call_subprocess(clean_args, cwd=req.source_dir)
+            return True
+        except Exception:
+            logger.error('Failed cleaning build dir for %s', req.name)
+            return False
+
+    def build(
+        self,
+        requirements,  # type: Iterable[InstallRequirement]
+        session,  # type: PipSession
+        autobuilding=False  # type: bool
+    ):
+        # type: (...) -> List[InstallRequirement]
+        """Build wheels.
+
+        :param unpack: If True, replace the sdist we built from with the
+            newly built wheel, in preparation for installation.
+        :return: True if all the wheels built correctly.
+        """
+        buildset = []
+        format_control = self.finder.format_control
+        # Whether a cache directory is available for autobuilding=True.
+        cache_available = bool(self._wheel_dir or self.wheel_cache.cache_dir)
+
+        for req in requirements:
+            ephem_cache = should_use_ephemeral_cache(
+                req, format_control=format_control, autobuilding=autobuilding,
+                cache_available=cache_available,
+            )
+            if ephem_cache is None:
+                continue
+
+            buildset.append((req, ephem_cache))
+
+        if not buildset:
+            return []
+
+        # Is any wheel build not using the ephemeral cache?
+        if any(not ephem_cache for _, ephem_cache in buildset):
+            have_directory_for_build = self._wheel_dir or (
+                autobuilding and self.wheel_cache.cache_dir
+            )
+            assert have_directory_for_build
+
+        # TODO by @pradyunsg
+        # Should break up this method into 2 separate methods.
+
+        # Build the wheels.
+        logger.info(
+            'Building wheels for collected packages: %s',
+            ', '.join([req.name for (req, _) in buildset]),
+        )
+        _cache = self.wheel_cache  # shorter name
+        with indent_log():
+            build_success, build_failure = [], []
+            for req, ephem in buildset:
+                python_tag = None
+                if autobuilding:
+                    python_tag = pep425tags.implementation_tag
+                    if ephem:
+                        output_dir = _cache.get_ephem_path_for_link(req.link)
+                    else:
+                        output_dir = _cache.get_path_for_link(req.link)
+                    try:
+                        ensure_dir(output_dir)
+                    except OSError as e:
+                        logger.warning("Building wheel for %s failed: %s",
+                                       req.name, e)
+                        build_failure.append(req)
+                        continue
+                else:
+                    output_dir = self._wheel_dir
+                wheel_file = self._build_one(
+                    req, output_dir,
+                    python_tag=python_tag,
+                )
+                if wheel_file:
+                    build_success.append(req)
+                    if autobuilding:
+                        # XXX: This is mildly duplicative with prepare_files,
+                        # but not close enough to pull out to a single common
+                        # method.
+                        # The code below assumes temporary source dirs -
+                        # prevent it doing bad things.
+                        if req.source_dir and not os.path.exists(os.path.join(
+                                req.source_dir, PIP_DELETE_MARKER_FILENAME)):
+                            raise AssertionError(
+                                "bad source dir - missing marker")
+                        # Delete the source we built the wheel from
+                        req.remove_temporary_source()
+                        # set the build directory again - name is known from
+                        # the work prepare_files did.
+                        req.source_dir = req.build_location(
+                            self.preparer.build_dir
+                        )
+                        # Update the link for this.
+                        req.link = Link(path_to_url(wheel_file))
+                        assert req.link.is_wheel
+                        # extract the wheel into the dir
+                        unpack_url(
+                            req.link, req.source_dir, None, False,
+                            session=session,
+                        )
+                else:
+                    build_failure.append(req)
+
+        # notify success/failure
+        if build_success:
+            logger.info(
+                'Successfully built %s',
+                ' '.join([req.name for req in build_success]),
+            )
+        if build_failure:
+            logger.info(
+                'Failed to build %s',
+                ' '.join([req.name for req in build_failure]),
+            )
+        # Return a list of requirements that failed to build
+        return build_failure
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__init__.py
new file mode 100644
index 00000000..c1d9508d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__init__.py
@@ -0,0 +1,109 @@
+"""
+pip._vendor is for vendoring dependencies of pip to prevent needing pip to
+depend on something external.
+
+Files inside of pip._vendor should be considered immutable and should only be
+updated to versions from upstream.
+"""
+from __future__ import absolute_import
+
+import glob
+import os.path
+import sys
+
+# Downstream redistributors which have debundled our dependencies should also
+# patch this value to be true. This will trigger the additional patching
+# to cause things like "six" to be available as pip.
+DEBUNDLED = False
+
+# By default, look in this directory for a bunch of .whl files which we will
+# add to the beginning of sys.path before attempting to import anything. This
+# is done to support downstream re-distributors like Debian and Fedora who
+# wish to create their own Wheels for our dependencies to aid in debundling.
+WHEEL_DIR = os.path.abspath(os.path.dirname(__file__))
+
+
+# Define a small helper function to alias our vendored modules to the real ones
+# if the vendored ones do not exist. This idea of this was taken from
+# https://github.com/kennethreitz/requests/pull/2567.
+def vendored(modulename):
+    vendored_name = "{0}.{1}".format(__name__, modulename)
+
+    try:
+        __import__(modulename, globals(), locals(), level=0)
+    except ImportError:
+        # We can just silently allow import failures to pass here. If we
+        # got to this point it means that ``import pip._vendor.whatever``
+        # failed and so did ``import whatever``. Since we're importing this
+        # upfront in an attempt to alias imports, not erroring here will
+        # just mean we get a regular import error whenever pip *actually*
+        # tries to import one of these modules to use it, which actually
+        # gives us a better error message than we would have otherwise
+        # gotten.
+        pass
+    else:
+        sys.modules[vendored_name] = sys.modules[modulename]
+        base, head = vendored_name.rsplit(".", 1)
+        setattr(sys.modules[base], head, sys.modules[modulename])
+
+
+# If we're operating in a debundled setup, then we want to go ahead and trigger
+# the aliasing of our vendored libraries as well as looking for wheels to add
+# to our sys.path. This will cause all of this code to be a no-op typically
+# however downstream redistributors can enable it in a consistent way across
+# all platforms.
+if DEBUNDLED:
+    # Actually look inside of WHEEL_DIR to find .whl files and add them to the
+    # front of our sys.path.
+    sys.path[:] = glob.glob(os.path.join(WHEEL_DIR, "*.whl")) + sys.path
+
+    # Actually alias all of our vendored dependencies.
+    vendored("cachecontrol")
+    vendored("colorama")
+    vendored("distlib")
+    vendored("distro")
+    vendored("html5lib")
+    vendored("lockfile")
+    vendored("six")
+    vendored("six.moves")
+    vendored("six.moves.urllib")
+    vendored("six.moves.urllib.parse")
+    vendored("packaging")
+    vendored("packaging.version")
+    vendored("packaging.specifiers")
+    vendored("pep517")
+    vendored("pkg_resources")
+    vendored("progress")
+    vendored("pytoml")
+    vendored("retrying")
+    vendored("requests")
+    vendored("requests.exceptions")
+    vendored("requests.packages")
+    vendored("requests.packages.urllib3")
+    vendored("requests.packages.urllib3._collections")
+    vendored("requests.packages.urllib3.connection")
+    vendored("requests.packages.urllib3.connectionpool")
+    vendored("requests.packages.urllib3.contrib")
+    vendored("requests.packages.urllib3.contrib.ntlmpool")
+    vendored("requests.packages.urllib3.contrib.pyopenssl")
+    vendored("requests.packages.urllib3.exceptions")
+    vendored("requests.packages.urllib3.fields")
+    vendored("requests.packages.urllib3.filepost")
+    vendored("requests.packages.urllib3.packages")
+    vendored("requests.packages.urllib3.packages.ordered_dict")
+    vendored("requests.packages.urllib3.packages.six")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname."
+             "_implementation")
+    vendored("requests.packages.urllib3.poolmanager")
+    vendored("requests.packages.urllib3.request")
+    vendored("requests.packages.urllib3.response")
+    vendored("requests.packages.urllib3.util")
+    vendored("requests.packages.urllib3.util.connection")
+    vendored("requests.packages.urllib3.util.request")
+    vendored("requests.packages.urllib3.util.response")
+    vendored("requests.packages.urllib3.util.retry")
+    vendored("requests.packages.urllib3.util.ssl_")
+    vendored("requests.packages.urllib3.util.timeout")
+    vendored("requests.packages.urllib3.util.url")
+    vendored("urllib3")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..041ceebc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/appdirs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/appdirs.cpython-37.pyc
new file mode 100644
index 00000000..10e550c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/appdirs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/distro.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/distro.cpython-37.pyc
new file mode 100644
index 00000000..ddbae55a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/distro.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/ipaddress.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/ipaddress.cpython-37.pyc
new file mode 100644
index 00000000..9a4d41f4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/ipaddress.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/pyparsing.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/pyparsing.cpython-37.pyc
new file mode 100644
index 00000000..90f54487
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/pyparsing.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/retrying.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/retrying.cpython-37.pyc
new file mode 100644
index 00000000..4d3b84bb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/retrying.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/six.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/six.cpython-37.pyc
new file mode 100644
index 00000000..c859104c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/__pycache__/six.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/appdirs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/appdirs.py
new file mode 100644
index 00000000..2bd39110
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/appdirs.py
@@ -0,0 +1,604 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2005-2010 ActiveState Software Inc.
+# Copyright (c) 2013 Eddy Petrișor
+
+"""Utilities for determining application-specific dirs.
+
+See <http://github.com/ActiveState/appdirs> for details and usage.
+"""
+# Dev Notes:
+# - MSDN on where to store app data files:
+#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
+# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
+# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+__version_info__ = (1, 4, 3)
+__version__ = '.'.join(map(str, __version_info__))
+
+
+import sys
+import os
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    unicode = str
+
+if sys.platform.startswith('java'):
+    import platform
+    os_name = platform.java_ver()[3][0]
+    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
+        system = 'win32'
+    elif os_name.startswith('Mac'): # "Mac OS X", etc.
+        system = 'darwin'
+    else: # "Linux", "SunOS", "FreeBSD", etc.
+        # Setting this to "linux2" is not ideal, but only Windows or Mac
+        # are actually checked for and the rest of the module expects
+        # *sys.platform* style strings.
+        system = 'linux2'
+else:
+    system = sys.platform
+
+
+
+def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               ~/Library/Application Support/<AppName>
+        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
+        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
+        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(_get_win_folder(const))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Application Support/')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of data dirs should be
+            returned. By default, the first item from XDG_DATA_DIRS is
+            returned, or '/usr/local/share/<AppName>',
+            if XDG_DATA_DIRS is not set
+
+    Typical site data directories are:
+        Mac OS X:   /Library/Application Support/<AppName>
+        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
+        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
+
+    For Unix, this is using the $XDG_DATA_DIRS[0] default.
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('/Library/Application Support')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        # XDG default for $XDG_DATA_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_DATA_DIRS',
+                         os.pathsep.join(['/usr/local/share', '/usr/share']))
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+        return path
+
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user config directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of config dirs should be
+            returned. By default, the first item from XDG_CONFIG_DIRS is
+            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
+
+    Typical site config directories are:
+        Mac OS X:   same as site_data_dir
+        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
+                    $XDG_CONFIG_DIRS
+        Win *:      same as site_data_dir
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+
+    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system in ["win32", "darwin"]:
+        path = site_data_dir(appname, appauthor)
+        if appname and version:
+            path = os.path.join(path, version)
+    else:
+        # XDG default for $XDG_CONFIG_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+    return path
+
+
+def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Cache" to the base app data dir for Windows. See
+            discussion below.
+
+    Typical user cache directories are:
+        Mac OS X:   ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go in
+    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
+    app data dir (the default returned by `user_data_dir` above). Apps typically
+    put cache data somewhere *under* the given dir here. Some examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+            if opinion:
+                path = os.path.join(path, "Cache")
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Caches')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific state dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user state directories are:
+        Mac OS X:  same as user_data_dir
+        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
+        Win *:     same as user_data_dir
+
+    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
+    to extend the XDG spec and support $XDG_STATE_HOME.
+
+    That means, by default "~/.local/state/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific log dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Logs" to the base app data dir for Windows, and "log" to the
+            base cache dir for Unix. See discussion below.
+
+    Typical user log directories are:
+        Mac OS X:   ~/Library/Logs/<AppName>
+        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
+
+    On Windows the only suggestion in the MSDN docs is that local settings
+    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
+    examples of what some windows apps use for a logs dir.)
+
+    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
+    value for Windows and appends "log" to the user cache dir for Unix.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "darwin":
+        path = os.path.join(
+            os.path.expanduser('~/Library/Logs'),
+            appname)
+    elif system == "win32":
+        path = user_data_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "Logs")
+    else:
+        path = user_cache_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "log")
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+class AppDirs(object):
+    """Convenience wrapper for getting application dirs."""
+    def __init__(self, appname=None, appauthor=None, version=None,
+            roaming=False, multipath=False):
+        self.appname = appname
+        self.appauthor = appauthor
+        self.version = version
+        self.roaming = roaming
+        self.multipath = multipath
+
+    @property
+    def user_data_dir(self):
+        return user_data_dir(self.appname, self.appauthor,
+                             version=self.version, roaming=self.roaming)
+
+    @property
+    def site_data_dir(self):
+        return site_data_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_config_dir(self):
+        return user_config_dir(self.appname, self.appauthor,
+                               version=self.version, roaming=self.roaming)
+
+    @property
+    def site_config_dir(self):
+        return site_config_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_cache_dir(self):
+        return user_cache_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_state_dir(self):
+        return user_state_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_log_dir(self):
+        return user_log_dir(self.appname, self.appauthor,
+                            version=self.version)
+
+
+#---- internal support stuff
+
+def _get_win_folder_from_registry(csidl_name):
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    if PY3:
+      import winreg as _winreg
+    else:
+      import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
+    return dir
+
+
+def _get_win_folder_with_pywin32(csidl_name):
+    from win32com.shell import shellcon, shell
+    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
+    # Try to make this a unicode path because SHGetFolderPath does
+    # not return unicode strings when there is unicode data in the
+    # path.
+    try:
+        dir = unicode(dir)
+
+        # Downgrade to short path name if have highbit chars. See
+        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+        has_high_char = False
+        for c in dir:
+            if ord(c) > 255:
+                has_high_char = True
+                break
+        if has_high_char:
+            try:
+                import win32api
+                dir = win32api.GetShortPathName(dir)
+            except ImportError:
+                pass
+    except UnicodeError:
+        pass
+    return dir
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    import ctypes
+
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+def _get_win_folder_with_jna(csidl_name):
+    import array
+    from com.sun import jna
+    from com.sun.jna.platform import win32
+
+    buf_size = win32.WinDef.MAX_PATH * 2
+    buf = array.zeros('c', buf_size)
+    shell = win32.Shell32.INSTANCE
+    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
+    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in dir:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf = array.zeros('c', buf_size)
+        kernel = win32.Kernel32.INSTANCE
+        if kernel.GetShortPathName(dir, buf, buf_size):
+            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    return dir
+
+if system == "win32":
+    try:
+        from ctypes import windll
+        _get_win_folder = _get_win_folder_with_ctypes
+    except ImportError:
+        try:
+            import com.sun.jna
+            _get_win_folder = _get_win_folder_with_jna
+        except ImportError:
+            _get_win_folder = _get_win_folder_from_registry
+
+
+#---- self test code
+
+if __name__ == "__main__":
+    appname = "MyApp"
+    appauthor = "MyCompany"
+
+    props = ("user_data_dir",
+             "user_config_dir",
+             "user_cache_dir",
+             "user_state_dir",
+             "user_log_dir",
+             "site_data_dir",
+             "site_config_dir")
+
+    print("-- app dirs %s --" % __version__)
+
+    print("-- app dirs (with optional 'version')")
+    dirs = AppDirs(appname, appauthor, version="1.0")
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = AppDirs(appname, appauthor)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = AppDirs(appname)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = AppDirs(appname, appauthor=False)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__init__.py
new file mode 100644
index 00000000..8fdee66f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__init__.py
@@ -0,0 +1,11 @@
+"""CacheControl import Interface.
+
+Make it easy to import from cachecontrol without long namespaces.
+"""
+__author__ = "Eric Larson"
+__email__ = "eric@ionrock.org"
+__version__ = "0.12.5"
+
+from .wrapper import CacheControl
+from .adapter import CacheControlAdapter
+from .controller import CacheController
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..32804460
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/_cmd.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/_cmd.cpython-37.pyc
new file mode 100644
index 00000000..2cbff619
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/_cmd.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/adapter.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/adapter.cpython-37.pyc
new file mode 100644
index 00000000..57a49d34
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/adapter.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/cache.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/cache.cpython-37.pyc
new file mode 100644
index 00000000..46cc0553
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/cache.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/compat.cpython-37.pyc
new file mode 100644
index 00000000..a5e4ca8f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/controller.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/controller.cpython-37.pyc
new file mode 100644
index 00000000..569de920
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/controller.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/filewrapper.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/filewrapper.cpython-37.pyc
new file mode 100644
index 00000000..65087472
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/filewrapper.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/heuristics.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/heuristics.cpython-37.pyc
new file mode 100644
index 00000000..de9cfead
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/heuristics.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-37.pyc
new file mode 100644
index 00000000..a4aeeb66
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/wrapper.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/wrapper.cpython-37.pyc
new file mode 100644
index 00000000..7f6d9ab2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/__pycache__/wrapper.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/_cmd.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/_cmd.py
new file mode 100644
index 00000000..f1e0ad94
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/_cmd.py
@@ -0,0 +1,57 @@
+import logging
+
+from pip._vendor import requests
+
+from pip._vendor.cachecontrol.adapter import CacheControlAdapter
+from pip._vendor.cachecontrol.cache import DictCache
+from pip._vendor.cachecontrol.controller import logger
+
+from argparse import ArgumentParser
+
+
+def setup_logging():
+    logger.setLevel(logging.DEBUG)
+    handler = logging.StreamHandler()
+    logger.addHandler(handler)
+
+
+def get_session():
+    adapter = CacheControlAdapter(
+        DictCache(), cache_etags=True, serializer=None, heuristic=None
+    )
+    sess = requests.Session()
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    sess.cache_controller = adapter.controller
+    return sess
+
+
+def get_args():
+    parser = ArgumentParser()
+    parser.add_argument("url", help="The URL to try and cache")
+    return parser.parse_args()
+
+
+def main(args=None):
+    args = get_args()
+    sess = get_session()
+
+    # Make a request to get a response
+    resp = sess.get(args.url)
+
+    # Turn on logging
+    setup_logging()
+
+    # try setting the cache
+    sess.cache_controller.cache_response(resp.request, resp.raw)
+
+    # Now try to get it
+    if sess.cache_controller.cached_request(resp.request):
+        print("Cached!")
+    else:
+        print("Not cached :(")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/adapter.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/adapter.py
new file mode 100644
index 00000000..780eb288
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/adapter.py
@@ -0,0 +1,133 @@
+import types
+import functools
+import zlib
+
+from pip._vendor.requests.adapters import HTTPAdapter
+
+from .controller import CacheController
+from .cache import DictCache
+from .filewrapper import CallbackFileWrapper
+
+
+class CacheControlAdapter(HTTPAdapter):
+    invalidating_methods = {"PUT", "DELETE"}
+
+    def __init__(
+        self,
+        cache=None,
+        cache_etags=True,
+        controller_class=None,
+        serializer=None,
+        heuristic=None,
+        cacheable_methods=None,
+        *args,
+        **kw
+    ):
+        super(CacheControlAdapter, self).__init__(*args, **kw)
+        self.cache = cache or DictCache()
+        self.heuristic = heuristic
+        self.cacheable_methods = cacheable_methods or ("GET",)
+
+        controller_factory = controller_class or CacheController
+        self.controller = controller_factory(
+            self.cache, cache_etags=cache_etags, serializer=serializer
+        )
+
+    def send(self, request, cacheable_methods=None, **kw):
+        """
+        Send a request. Use the request information to see if it
+        exists in the cache and cache the response if we need to and can.
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if request.method in cacheable:
+            try:
+                cached_response = self.controller.cached_request(request)
+            except zlib.error:
+                cached_response = None
+            if cached_response:
+                return self.build_response(request, cached_response, from_cache=True)
+
+            # check for etags and add headers if appropriate
+            request.headers.update(self.controller.conditional_headers(request))
+
+        resp = super(CacheControlAdapter, self).send(request, **kw)
+
+        return resp
+
+    def build_response(
+        self, request, response, from_cache=False, cacheable_methods=None
+    ):
+        """
+        Build a response by making a request or using the cache.
+
+        This will end up calling send and returning a potentially
+        cached response
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if not from_cache and request.method in cacheable:
+            # Check for any heuristics that might update headers
+            # before trying to cache.
+            if self.heuristic:
+                response = self.heuristic.apply(response)
+
+            # apply any expiration heuristics
+            if response.status == 304:
+                # We must have sent an ETag request. This could mean
+                # that we've been expired already or that we simply
+                # have an etag. In either case, we want to try and
+                # update the cache if that is the case.
+                cached_response = self.controller.update_cached_response(
+                    request, response
+                )
+
+                if cached_response is not response:
+                    from_cache = True
+
+                # We are done with the server response, read a
+                # possible response body (compliant servers will
+                # not return one, but we cannot be 100% sure) and
+                # release the connection back to the pool.
+                response.read(decode_content=False)
+                response.release_conn()
+
+                response = cached_response
+
+            # We always cache the 301 responses
+            elif response.status == 301:
+                self.controller.cache_response(request, response)
+            else:
+                # Wrap the response file with a wrapper that will cache the
+                #   response when the stream has been consumed.
+                response._fp = CallbackFileWrapper(
+                    response._fp,
+                    functools.partial(
+                        self.controller.cache_response, request, response
+                    ),
+                )
+                if response.chunked:
+                    super_update_chunk_length = response._update_chunk_length
+
+                    def _update_chunk_length(self):
+                        super_update_chunk_length()
+                        if self.chunk_left == 0:
+                            self._fp._close()
+
+                    response._update_chunk_length = types.MethodType(
+                        _update_chunk_length, response
+                    )
+
+        resp = super(CacheControlAdapter, self).build_response(request, response)
+
+        # See if we should invalidate the cache.
+        if request.method in self.invalidating_methods and resp.ok:
+            cache_url = self.controller.cache_url(request.url)
+            self.cache.delete(cache_url)
+
+        # Give the request a from_cache attr to let people use it
+        resp.from_cache = from_cache
+
+        return resp
+
+    def close(self):
+        self.cache.close()
+        super(CacheControlAdapter, self).close()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/cache.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/cache.py
new file mode 100644
index 00000000..94e07732
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/cache.py
@@ -0,0 +1,39 @@
+"""
+The cache object API for implementing caches. The default is a thread
+safe in-memory dictionary.
+"""
+from threading import Lock
+
+
+class BaseCache(object):
+
+    def get(self, key):
+        raise NotImplementedError()
+
+    def set(self, key, value):
+        raise NotImplementedError()
+
+    def delete(self, key):
+        raise NotImplementedError()
+
+    def close(self):
+        pass
+
+
+class DictCache(BaseCache):
+
+    def __init__(self, init_dict=None):
+        self.lock = Lock()
+        self.data = init_dict or {}
+
+    def get(self, key):
+        return self.data.get(key, None)
+
+    def set(self, key, value):
+        with self.lock:
+            self.data.update({key: value})
+
+    def delete(self, key):
+        with self.lock:
+            if key in self.data:
+                self.data.pop(key)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
new file mode 100644
index 00000000..0e1658fa
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
@@ -0,0 +1,2 @@
+from .file_cache import FileCache  # noqa
+from .redis_cache import RedisCache  # noqa
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..eaafcdfc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-37.pyc
new file mode 100644
index 00000000..0c1c82b5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-37.pyc
new file mode 100644
index 00000000..3e2fae30
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
new file mode 100644
index 00000000..1ba00806
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
@@ -0,0 +1,146 @@
+import hashlib
+import os
+from textwrap import dedent
+
+from ..cache import BaseCache
+from ..controller import CacheController
+
+try:
+    FileNotFoundError
+except NameError:
+    # py2.X
+    FileNotFoundError = (IOError, OSError)
+
+
+def _secure_open_write(filename, fmode):
+    # We only want to write to this file, so open it in write only mode
+    flags = os.O_WRONLY
+
+    # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only
+    #  will open *new* files.
+    # We specify this because we want to ensure that the mode we pass is the
+    # mode of the file.
+    flags |= os.O_CREAT | os.O_EXCL
+
+    # Do not follow symlinks to prevent someone from making a symlink that
+    # we follow and insecurely open a cache file.
+    if hasattr(os, "O_NOFOLLOW"):
+        flags |= os.O_NOFOLLOW
+
+    # On Windows we'll mark this file as binary
+    if hasattr(os, "O_BINARY"):
+        flags |= os.O_BINARY
+
+    # Before we open our file, we want to delete any existing file that is
+    # there
+    try:
+        os.remove(filename)
+    except (IOError, OSError):
+        # The file must not exist already, so we can just skip ahead to opening
+        pass
+
+    # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a
+    # race condition happens between the os.remove and this line, that an
+    # error will be raised. Because we utilize a lockfile this should only
+    # happen if someone is attempting to attack us.
+    fd = os.open(filename, flags, fmode)
+    try:
+        return os.fdopen(fd, "wb")
+
+    except:
+        # An error occurred wrapping our FD in a file object
+        os.close(fd)
+        raise
+
+
+class FileCache(BaseCache):
+
+    def __init__(
+        self,
+        directory,
+        forever=False,
+        filemode=0o0600,
+        dirmode=0o0700,
+        use_dir_lock=None,
+        lock_class=None,
+    ):
+
+        if use_dir_lock is not None and lock_class is not None:
+            raise ValueError("Cannot use use_dir_lock and lock_class together")
+
+        try:
+            from pip._vendor.lockfile import LockFile
+            from pip._vendor.lockfile.mkdirlockfile import MkdirLockFile
+        except ImportError:
+            notice = dedent(
+                """
+            NOTE: In order to use the FileCache you must have
+            lockfile installed. You can install it via pip:
+              pip install lockfile
+            """
+            )
+            raise ImportError(notice)
+
+        else:
+            if use_dir_lock:
+                lock_class = MkdirLockFile
+
+            elif lock_class is None:
+                lock_class = LockFile
+
+        self.directory = directory
+        self.forever = forever
+        self.filemode = filemode
+        self.dirmode = dirmode
+        self.lock_class = lock_class
+
+    @staticmethod
+    def encode(x):
+        return hashlib.sha224(x.encode()).hexdigest()
+
+    def _fn(self, name):
+        # NOTE: This method should not change as some may depend on it.
+        #       See: https://github.com/ionrock/cachecontrol/issues/63
+        hashed = self.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key):
+        name = self._fn(key)
+        try:
+            with open(name, "rb") as fh:
+                return fh.read()
+
+        except FileNotFoundError:
+            return None
+
+    def set(self, key, value):
+        name = self._fn(key)
+
+        # Make sure the directory exists
+        try:
+            os.makedirs(os.path.dirname(name), self.dirmode)
+        except (IOError, OSError):
+            pass
+
+        with self.lock_class(name) as lock:
+            # Write our actual file
+            with _secure_open_write(lock.path, self.filemode) as fh:
+                fh.write(value)
+
+    def delete(self, key):
+        name = self._fn(key)
+        if not self.forever:
+            try:
+                os.remove(name)
+            except FileNotFoundError:
+                pass
+
+
+def url_to_file_path(url, filecache):
+    """Return the file cache path based on the URL.
+
+    This does not ensure the file exists!
+    """
+    key = CacheController.cache_url(url)
+    return filecache._fn(key)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
new file mode 100644
index 00000000..ed705ce7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
@@ -0,0 +1,33 @@
+from __future__ import division
+
+from datetime import datetime
+from pip._vendor.cachecontrol.cache import BaseCache
+
+
+class RedisCache(BaseCache):
+
+    def __init__(self, conn):
+        self.conn = conn
+
+    def get(self, key):
+        return self.conn.get(key)
+
+    def set(self, key, value, expires=None):
+        if not expires:
+            self.conn.set(key, value)
+        else:
+            expires = expires - datetime.utcnow()
+            self.conn.setex(key, int(expires.total_seconds()), value)
+
+    def delete(self, key):
+        self.conn.delete(key)
+
+    def clear(self):
+        """Helper for clearing all the keys in a database. Use with
+        caution!"""
+        for key in self.conn.keys():
+            self.conn.delete(key)
+
+    def close(self):
+        """Redis uses connection pooling, no need to close the connection."""
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/compat.py
new file mode 100644
index 00000000..33b5aed0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/compat.py
@@ -0,0 +1,29 @@
+try:
+    from urllib.parse import urljoin
+except ImportError:
+    from urlparse import urljoin
+
+
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
+
+# Handle the case where the requests module has been patched to not have
+# urllib3 bundled as part of its source.
+try:
+    from pip._vendor.requests.packages.urllib3.response import HTTPResponse
+except ImportError:
+    from pip._vendor.urllib3.response import HTTPResponse
+
+try:
+    from pip._vendor.requests.packages.urllib3.util import is_fp_closed
+except ImportError:
+    from pip._vendor.urllib3.util import is_fp_closed
+
+# Replicate some six behaviour
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/controller.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/controller.py
new file mode 100644
index 00000000..1b2b943c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/controller.py
@@ -0,0 +1,367 @@
+"""
+The httplib2 algorithms ported for use with requests.
+"""
+import logging
+import re
+import calendar
+import time
+from email.utils import parsedate_tz
+
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .cache import DictCache
+from .serialize import Serializer
+
+
+logger = logging.getLogger(__name__)
+
+URI = re.compile(r"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?")
+
+
+def parse_uri(uri):
+    """Parses a URI using the regex given in Appendix B of RFC 3986.
+
+        (scheme, authority, path, query, fragment) = parse_uri(uri)
+    """
+    groups = URI.match(uri).groups()
+    return (groups[1], groups[3], groups[4], groups[6], groups[8])
+
+
+class CacheController(object):
+    """An interface to see if request should cached or not.
+    """
+
+    def __init__(
+        self, cache=None, cache_etags=True, serializer=None, status_codes=None
+    ):
+        self.cache = cache or DictCache()
+        self.cache_etags = cache_etags
+        self.serializer = serializer or Serializer()
+        self.cacheable_status_codes = status_codes or (200, 203, 300, 301)
+
+    @classmethod
+    def _urlnorm(cls, uri):
+        """Normalize the URL to create a safe key for the cache"""
+        (scheme, authority, path, query, fragment) = parse_uri(uri)
+        if not scheme or not authority:
+            raise Exception("Only absolute URIs are allowed. uri = %s" % uri)
+
+        scheme = scheme.lower()
+        authority = authority.lower()
+
+        if not path:
+            path = "/"
+
+        # Could do syntax based normalization of the URI before
+        # computing the digest. See Section 6.2.2 of Std 66.
+        request_uri = query and "?".join([path, query]) or path
+        defrag_uri = scheme + "://" + authority + request_uri
+
+        return defrag_uri
+
+    @classmethod
+    def cache_url(cls, uri):
+        return cls._urlnorm(uri)
+
+    def parse_cache_control(self, headers):
+        known_directives = {
+            # https://tools.ietf.org/html/rfc7234#section-5.2
+            "max-age": (int, True),
+            "max-stale": (int, False),
+            "min-fresh": (int, True),
+            "no-cache": (None, False),
+            "no-store": (None, False),
+            "no-transform": (None, False),
+            "only-if-cached": (None, False),
+            "must-revalidate": (None, False),
+            "public": (None, False),
+            "private": (None, False),
+            "proxy-revalidate": (None, False),
+            "s-maxage": (int, True),
+        }
+
+        cc_headers = headers.get("cache-control", headers.get("Cache-Control", ""))
+
+        retval = {}
+
+        for cc_directive in cc_headers.split(","):
+            if not cc_directive.strip():
+                continue
+
+            parts = cc_directive.split("=", 1)
+            directive = parts[0].strip()
+
+            try:
+                typ, required = known_directives[directive]
+            except KeyError:
+                logger.debug("Ignoring unknown cache-control directive: %s", directive)
+                continue
+
+            if not typ or not required:
+                retval[directive] = None
+            if typ:
+                try:
+                    retval[directive] = typ(parts[1].strip())
+                except IndexError:
+                    if required:
+                        logger.debug(
+                            "Missing value for cache-control " "directive: %s",
+                            directive,
+                        )
+                except ValueError:
+                    logger.debug(
+                        "Invalid value for cache-control directive " "%s, must be %s",
+                        directive,
+                        typ.__name__,
+                    )
+
+        return retval
+
+    def cached_request(self, request):
+        """
+        Return a cached response if it exists in the cache, otherwise
+        return False.
+        """
+        cache_url = self.cache_url(request.url)
+        logger.debug('Looking up "%s" in the cache', cache_url)
+        cc = self.parse_cache_control(request.headers)
+
+        # Bail out if the request insists on fresh data
+        if "no-cache" in cc:
+            logger.debug('Request header has "no-cache", cache bypassed')
+            return False
+
+        if "max-age" in cc and cc["max-age"] == 0:
+            logger.debug('Request header has "max_age" as 0, cache bypassed')
+            return False
+
+        # Request allows serving from the cache, let's see if we find something
+        cache_data = self.cache.get(cache_url)
+        if cache_data is None:
+            logger.debug("No cache entry available")
+            return False
+
+        # Check whether it can be deserialized
+        resp = self.serializer.loads(request, cache_data)
+        if not resp:
+            logger.warning("Cache entry deserialization failed, entry ignored")
+            return False
+
+        # If we have a cached 301, return it immediately. We don't
+        # need to test our response for other headers b/c it is
+        # intrinsically "cacheable" as it is Permanent.
+        # See:
+        #   https://tools.ietf.org/html/rfc7231#section-6.4.2
+        #
+        # Client can try to refresh the value by repeating the request
+        # with cache busting headers as usual (ie no-cache).
+        if resp.status == 301:
+            msg = (
+                'Returning cached "301 Moved Permanently" response '
+                "(ignoring date and etag information)"
+            )
+            logger.debug(msg)
+            return resp
+
+        headers = CaseInsensitiveDict(resp.headers)
+        if not headers or "date" not in headers:
+            if "etag" not in headers:
+                # Without date or etag, the cached response can never be used
+                # and should be deleted.
+                logger.debug("Purging cached response: no date or etag")
+                self.cache.delete(cache_url)
+            logger.debug("Ignoring cached response: no date")
+            return False
+
+        now = time.time()
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        current_age = max(0, now - date)
+        logger.debug("Current age based on date: %i", current_age)
+
+        # TODO: There is an assumption that the result will be a
+        #       urllib3 response object. This may not be best since we
+        #       could probably avoid instantiating or constructing the
+        #       response until we know we need it.
+        resp_cc = self.parse_cache_control(headers)
+
+        # determine freshness
+        freshness_lifetime = 0
+
+        # Check the max-age pragma in the cache control header
+        if "max-age" in resp_cc:
+            freshness_lifetime = resp_cc["max-age"]
+            logger.debug("Freshness lifetime from max-age: %i", freshness_lifetime)
+
+        # If there isn't a max-age, check for an expires header
+        elif "expires" in headers:
+            expires = parsedate_tz(headers["expires"])
+            if expires is not None:
+                expire_time = calendar.timegm(expires) - date
+                freshness_lifetime = max(0, expire_time)
+                logger.debug("Freshness lifetime from expires: %i", freshness_lifetime)
+
+        # Determine if we are setting freshness limit in the
+        # request. Note, this overrides what was in the response.
+        if "max-age" in cc:
+            freshness_lifetime = cc["max-age"]
+            logger.debug(
+                "Freshness lifetime from request max-age: %i", freshness_lifetime
+            )
+
+        if "min-fresh" in cc:
+            min_fresh = cc["min-fresh"]
+            # adjust our current age by our min fresh
+            current_age += min_fresh
+            logger.debug("Adjusted current age from min-fresh: %i", current_age)
+
+        # Return entry if it is fresh enough
+        if freshness_lifetime > current_age:
+            logger.debug('The response is "fresh", returning cached response')
+            logger.debug("%i > %i", freshness_lifetime, current_age)
+            return resp
+
+        # we're not fresh. If we don't have an Etag, clear it out
+        if "etag" not in headers:
+            logger.debug('The cached response is "stale" with no etag, purging')
+            self.cache.delete(cache_url)
+
+        # return the original handler
+        return False
+
+    def conditional_headers(self, request):
+        cache_url = self.cache_url(request.url)
+        resp = self.serializer.loads(request, self.cache.get(cache_url))
+        new_headers = {}
+
+        if resp:
+            headers = CaseInsensitiveDict(resp.headers)
+
+            if "etag" in headers:
+                new_headers["If-None-Match"] = headers["ETag"]
+
+            if "last-modified" in headers:
+                new_headers["If-Modified-Since"] = headers["Last-Modified"]
+
+        return new_headers
+
+    def cache_response(self, request, response, body=None, status_codes=None):
+        """
+        Algorithm for caching requests.
+
+        This assumes a requests Response object.
+        """
+        # From httplib2: Don't cache 206's since we aren't going to
+        #                handle byte range requests
+        cacheable_status_codes = status_codes or self.cacheable_status_codes
+        if response.status not in cacheable_status_codes:
+            logger.debug(
+                "Status code %s not in %s", response.status, cacheable_status_codes
+            )
+            return
+
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        # If we've been given a body, our response has a Content-Length, that
+        # Content-Length is valid then we can check to see if the body we've
+        # been given matches the expected size, and if it doesn't we'll just
+        # skip trying to cache it.
+        if (
+            body is not None
+            and "content-length" in response_headers
+            and response_headers["content-length"].isdigit()
+            and int(response_headers["content-length"]) != len(body)
+        ):
+            return
+
+        cc_req = self.parse_cache_control(request.headers)
+        cc = self.parse_cache_control(response_headers)
+
+        cache_url = self.cache_url(request.url)
+        logger.debug('Updating cache with response from "%s"', cache_url)
+
+        # Delete it from the cache if we happen to have it stored there
+        no_store = False
+        if "no-store" in cc:
+            no_store = True
+            logger.debug('Response header has "no-store"')
+        if "no-store" in cc_req:
+            no_store = True
+            logger.debug('Request header has "no-store"')
+        if no_store and self.cache.get(cache_url):
+            logger.debug('Purging existing cache entry to honor "no-store"')
+            self.cache.delete(cache_url)
+        if no_store:
+            return
+
+        # If we've been given an etag, then keep the response
+        if self.cache_etags and "etag" in response_headers:
+            logger.debug("Caching due to etag")
+            self.cache.set(
+                cache_url, self.serializer.dumps(request, response, body=body)
+            )
+
+        # Add to the cache any 301s. We do this before looking that
+        # the Date headers.
+        elif response.status == 301:
+            logger.debug("Caching permanant redirect")
+            self.cache.set(cache_url, self.serializer.dumps(request, response))
+
+        # Add to the cache if the response headers demand it. If there
+        # is no date header then we can't do anything about expiring
+        # the cache.
+        elif "date" in response_headers:
+            # cache when there is a max-age > 0
+            if "max-age" in cc and cc["max-age"] > 0:
+                logger.debug("Caching b/c date exists and max-age > 0")
+                self.cache.set(
+                    cache_url, self.serializer.dumps(request, response, body=body)
+                )
+
+            # If the request can expire, it means we should cache it
+            # in the meantime.
+            elif "expires" in response_headers:
+                if response_headers["expires"]:
+                    logger.debug("Caching b/c of expires header")
+                    self.cache.set(
+                        cache_url, self.serializer.dumps(request, response, body=body)
+                    )
+
+    def update_cached_response(self, request, response):
+        """On a 304 we will get a new set of headers that we want to
+        update our cached value with, assuming we have one.
+
+        This should only ever be called when we've sent an ETag and
+        gotten a 304 as the response.
+        """
+        cache_url = self.cache_url(request.url)
+
+        cached_response = self.serializer.loads(request, self.cache.get(cache_url))
+
+        if not cached_response:
+            # we didn't have a cached response
+            return response
+
+        # Lets update our headers with the headers from the new request:
+        # http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-26#section-4.1
+        #
+        # The server isn't supposed to send headers that would make
+        # the cached body invalid. But... just in case, we'll be sure
+        # to strip out ones we know that might be problmatic due to
+        # typical assumptions.
+        excluded_headers = ["content-length"]
+
+        cached_response.headers.update(
+            dict(
+                (k, v)
+                for k, v in response.headers.items()
+                if k.lower() not in excluded_headers
+            )
+        )
+
+        # we want a 200 b/c we have content via the cache
+        cached_response.status = 200
+
+        # update our cache
+        self.cache.set(cache_url, self.serializer.dumps(request, cached_response))
+
+        return cached_response
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/filewrapper.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/filewrapper.py
new file mode 100644
index 00000000..30ed4c5a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/filewrapper.py
@@ -0,0 +1,80 @@
+from io import BytesIO
+
+
+class CallbackFileWrapper(object):
+    """
+    Small wrapper around a fp object which will tee everything read into a
+    buffer, and when that file is closed it will execute a callback with the
+    contents of that buffer.
+
+    All attributes are proxied to the underlying file object.
+
+    This class uses members with a double underscore (__) leading prefix so as
+    not to accidentally shadow an attribute.
+    """
+
+    def __init__(self, fp, callback):
+        self.__buf = BytesIO()
+        self.__fp = fp
+        self.__callback = callback
+
+    def __getattr__(self, name):
+        # The vaguaries of garbage collection means that self.__fp is
+        # not always set.  By using __getattribute__ and the private
+        # name[0] allows looking up the attribute value and raising an
+        # AttributeError when it doesn't exist. This stop thigns from
+        # infinitely recursing calls to getattr in the case where
+        # self.__fp hasn't been set.
+        #
+        # [0] https://docs.python.org/2/reference/expressions.html#atom-identifiers
+        fp = self.__getattribute__("_CallbackFileWrapper__fp")
+        return getattr(fp, name)
+
+    def __is_fp_closed(self):
+        try:
+            return self.__fp.fp is None
+
+        except AttributeError:
+            pass
+
+        try:
+            return self.__fp.closed
+
+        except AttributeError:
+            pass
+
+        # We just don't cache it then.
+        # TODO: Add some logging here...
+        return False
+
+    def _close(self):
+        if self.__callback:
+            self.__callback(self.__buf.getvalue())
+
+        # We assign this to None here, because otherwise we can get into
+        # really tricky problems where the CPython interpreter dead locks
+        # because the callback is holding a reference to something which
+        # has a __del__ method. Setting this to None breaks the cycle
+        # and allows the garbage collector to do it's thing normally.
+        self.__callback = None
+
+    def read(self, amt=None):
+        data = self.__fp.read(amt)
+        self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
+
+    def _safe_read(self, amt):
+        data = self.__fp._safe_read(amt)
+        if amt == 2 and data == b"\r\n":
+            # urllib executes this read to toss the CRLF at the end
+            # of the chunk.
+            return data
+
+        self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/heuristics.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/heuristics.py
new file mode 100644
index 00000000..6c0e9790
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/heuristics.py
@@ -0,0 +1,135 @@
+import calendar
+import time
+
+from email.utils import formatdate, parsedate, parsedate_tz
+
+from datetime import datetime, timedelta
+
+TIME_FMT = "%a, %d %b %Y %H:%M:%S GMT"
+
+
+def expire_after(delta, date=None):
+    date = date or datetime.utcnow()
+    return date + delta
+
+
+def datetime_to_header(dt):
+    return formatdate(calendar.timegm(dt.timetuple()))
+
+
+class BaseHeuristic(object):
+
+    def warning(self, response):
+        """
+        Return a valid 1xx warning header value describing the cache
+        adjustments.
+
+        The response is provided too allow warnings like 113
+        http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need
+        to explicitly say response is over 24 hours old.
+        """
+        return '110 - "Response is Stale"'
+
+    def update_headers(self, response):
+        """Update the response headers with any new headers.
+
+        NOTE: This SHOULD always include some Warning header to
+              signify that the response was cached by the client, not
+              by way of the provided headers.
+        """
+        return {}
+
+    def apply(self, response):
+        updated_headers = self.update_headers(response)
+
+        if updated_headers:
+            response.headers.update(updated_headers)
+            warning_header_value = self.warning(response)
+            if warning_header_value is not None:
+                response.headers.update({"Warning": warning_header_value})
+
+        return response
+
+
+class OneDayCache(BaseHeuristic):
+    """
+    Cache the response by providing an expires 1 day in the
+    future.
+    """
+
+    def update_headers(self, response):
+        headers = {}
+
+        if "expires" not in response.headers:
+            date = parsedate(response.headers["date"])
+            expires = expire_after(timedelta(days=1), date=datetime(*date[:6]))
+            headers["expires"] = datetime_to_header(expires)
+            headers["cache-control"] = "public"
+        return headers
+
+
+class ExpiresAfter(BaseHeuristic):
+    """
+    Cache **all** requests for a defined time period.
+    """
+
+    def __init__(self, **kw):
+        self.delta = timedelta(**kw)
+
+    def update_headers(self, response):
+        expires = expire_after(self.delta)
+        return {"expires": datetime_to_header(expires), "cache-control": "public"}
+
+    def warning(self, response):
+        tmpl = "110 - Automatically cached for %s. Response might be stale"
+        return tmpl % self.delta
+
+
+class LastModified(BaseHeuristic):
+    """
+    If there is no Expires header already, fall back on Last-Modified
+    using the heuristic from
+    http://tools.ietf.org/html/rfc7234#section-4.2.2
+    to calculate a reasonable value.
+
+    Firefox also does something like this per
+    https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ
+    http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397
+    Unlike mozilla we limit this to 24-hr.
+    """
+    cacheable_by_default_statuses = {
+        200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501
+    }
+
+    def update_headers(self, resp):
+        headers = resp.headers
+
+        if "expires" in headers:
+            return {}
+
+        if "cache-control" in headers and headers["cache-control"] != "public":
+            return {}
+
+        if resp.status not in self.cacheable_by_default_statuses:
+            return {}
+
+        if "date" not in headers or "last-modified" not in headers:
+            return {}
+
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        last_modified = parsedate(headers["last-modified"])
+        if date is None or last_modified is None:
+            return {}
+
+        now = time.time()
+        current_age = max(0, now - date)
+        delta = date - calendar.timegm(last_modified)
+        freshness_lifetime = max(0, min(delta / 10, 24 * 3600))
+        if freshness_lifetime <= current_age:
+            return {}
+
+        expires = date + freshness_lifetime
+        return {"expires": time.strftime(TIME_FMT, time.gmtime(expires))}
+
+    def warning(self, resp):
+        return None
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/serialize.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/serialize.py
new file mode 100644
index 00000000..ec43ff27
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/serialize.py
@@ -0,0 +1,186 @@
+import base64
+import io
+import json
+import zlib
+
+from pip._vendor import msgpack
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .compat import HTTPResponse, pickle, text_type
+
+
+def _b64_decode_bytes(b):
+    return base64.b64decode(b.encode("ascii"))
+
+
+def _b64_decode_str(s):
+    return _b64_decode_bytes(s).decode("utf8")
+
+
+class Serializer(object):
+
+    def dumps(self, request, response, body=None):
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        if body is None:
+            body = response.read(decode_content=False)
+
+            # NOTE: 99% sure this is dead code. I'm only leaving it
+            #       here b/c I don't have a test yet to prove
+            #       it. Basically, before using
+            #       `cachecontrol.filewrapper.CallbackFileWrapper`,
+            #       this made an effort to reset the file handle. The
+            #       `CallbackFileWrapper` short circuits this code by
+            #       setting the body as the content is consumed, the
+            #       result being a `body` argument is *always* passed
+            #       into cache_response, and in turn,
+            #       `Serializer.dump`.
+            response._fp = io.BytesIO(body)
+
+        # NOTE: This is all a bit weird, but it's really important that on
+        #       Python 2.x these objects are unicode and not str, even when
+        #       they contain only ascii. The problem here is that msgpack
+        #       understands the difference between unicode and bytes and we
+        #       have it set to differentiate between them, however Python 2
+        #       doesn't know the difference. Forcing these to unicode will be
+        #       enough to have msgpack know the difference.
+        data = {
+            u"response": {
+                u"body": body,
+                u"headers": dict(
+                    (text_type(k), text_type(v)) for k, v in response.headers.items()
+                ),
+                u"status": response.status,
+                u"version": response.version,
+                u"reason": text_type(response.reason),
+                u"strict": response.strict,
+                u"decode_content": response.decode_content,
+            }
+        }
+
+        # Construct our vary headers
+        data[u"vary"] = {}
+        if u"vary" in response_headers:
+            varied_headers = response_headers[u"vary"].split(",")
+            for header in varied_headers:
+                header = text_type(header).strip()
+                header_value = request.headers.get(header, None)
+                if header_value is not None:
+                    header_value = text_type(header_value)
+                data[u"vary"][header] = header_value
+
+        return b",".join([b"cc=4", msgpack.dumps(data, use_bin_type=True)])
+
+    def loads(self, request, data):
+        # Short circuit if we've been given an empty set of data
+        if not data:
+            return
+
+        # Determine what version of the serializer the data was serialized
+        # with
+        try:
+            ver, data = data.split(b",", 1)
+        except ValueError:
+            ver = b"cc=0"
+
+        # Make sure that our "ver" is actually a version and isn't a false
+        # positive from a , being in the data stream.
+        if ver[:3] != b"cc=":
+            data = ver + data
+            ver = b"cc=0"
+
+        # Get the version number out of the cc=N
+        ver = ver.split(b"=", 1)[-1].decode("ascii")
+
+        # Dispatch to the actual load method for the given version
+        try:
+            return getattr(self, "_loads_v{}".format(ver))(request, data)
+
+        except AttributeError:
+            # This is a version we don't have a loads function for, so we'll
+            # just treat it as a miss and return None
+            return
+
+    def prepare_response(self, request, cached):
+        """Verify our vary headers match and construct a real urllib3
+        HTTPResponse object.
+        """
+        # Special case the '*' Vary value as it means we cannot actually
+        # determine if the cached response is suitable for this request.
+        if "*" in cached.get("vary", {}):
+            return
+
+        # Ensure that the Vary headers for the cached response match our
+        # request
+        for header, value in cached.get("vary", {}).items():
+            if request.headers.get(header, None) != value:
+                return
+
+        body_raw = cached["response"].pop("body")
+
+        headers = CaseInsensitiveDict(data=cached["response"]["headers"])
+        if headers.get("transfer-encoding", "") == "chunked":
+            headers.pop("transfer-encoding")
+
+        cached["response"]["headers"] = headers
+
+        try:
+            body = io.BytesIO(body_raw)
+        except TypeError:
+            # This can happen if cachecontrol serialized to v1 format (pickle)
+            # using Python 2. A Python 2 str(byte string) will be unpickled as
+            # a Python 3 str (unicode string), which will cause the above to
+            # fail with:
+            #
+            #     TypeError: 'str' does not support the buffer interface
+            body = io.BytesIO(body_raw.encode("utf8"))
+
+        return HTTPResponse(body=body, preload_content=False, **cached["response"])
+
+    def _loads_v0(self, request, data):
+        # The original legacy cache data. This doesn't contain enough
+        # information to construct everything we need, so we'll treat this as
+        # a miss.
+        return
+
+    def _loads_v1(self, request, data):
+        try:
+            cached = pickle.loads(data)
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached)
+
+    def _loads_v2(self, request, data):
+        try:
+            cached = json.loads(zlib.decompress(data).decode("utf8"))
+        except (ValueError, zlib.error):
+            return
+
+        # We need to decode the items that we've base64 encoded
+        cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"])
+        cached["response"]["headers"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v))
+            for k, v in cached["response"]["headers"].items()
+        )
+        cached["response"]["reason"] = _b64_decode_str(cached["response"]["reason"])
+        cached["vary"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v) if v is not None else v)
+            for k, v in cached["vary"].items()
+        )
+
+        return self.prepare_response(request, cached)
+
+    def _loads_v3(self, request, data):
+        # Due to Python 2 encoding issues, it's impossible to know for sure
+        # exactly how to load v3 entries, thus we'll treat these as a miss so
+        # that they get rewritten out as v4 entries.
+        return
+
+    def _loads_v4(self, request, data):
+        try:
+            cached = msgpack.loads(data, encoding="utf-8")
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/wrapper.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/wrapper.py
new file mode 100644
index 00000000..265bfc8b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/cachecontrol/wrapper.py
@@ -0,0 +1,29 @@
+from .adapter import CacheControlAdapter
+from .cache import DictCache
+
+
+def CacheControl(
+    sess,
+    cache=None,
+    cache_etags=True,
+    serializer=None,
+    heuristic=None,
+    controller_class=None,
+    adapter_class=None,
+    cacheable_methods=None,
+):
+
+    cache = cache or DictCache()
+    adapter_class = adapter_class or CacheControlAdapter
+    adapter = adapter_class(
+        cache,
+        cache_etags=cache_etags,
+        serializer=serializer,
+        heuristic=heuristic,
+        controller_class=controller_class,
+        cacheable_methods=cacheable_methods,
+    )
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    return sess
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__init__.py
new file mode 100644
index 00000000..8ccb14e2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__init__.py
@@ -0,0 +1,3 @@
+from .core import where
+
+__version__ = "2019.06.16"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__main__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__main__.py
new file mode 100644
index 00000000..ae2aff5c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__main__.py
@@ -0,0 +1,2 @@
+from pip._vendor.certifi import where
+print(where())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..d45c81cb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-37.pyc
new file mode 100644
index 00000000..819b4374
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-37.pyc
new file mode 100644
index 00000000..c6cca931
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/cacert.pem b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/cacert.pem
new file mode 100644
index 00000000..9ca290f5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/cacert.pem
@@ -0,0 +1,4618 @@
+
+# Issuer: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Subject: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Label: "GlobalSign Root CA"
+# Serial: 4835703278459707669005204
+# MD5 Fingerprint: 3e:45:52:15:09:51:92:e1:b7:5d:37:9f:b1:87:29:8a
+# SHA1 Fingerprint: b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c
+# SHA256 Fingerprint: eb:d4:10:40:e4:bb:3e:c7:42:c9:e3:81:d3:1e:f2:a4:1a:48:b6:68:5c:96:e7:ce:f3:c1:df:6c:d4:33:1c:99
+-----BEGIN CERTIFICATE-----
+MIIDdTCCAl2gAwIBAgILBAAAAAABFUtaw5QwDQYJKoZIhvcNAQEFBQAwVzELMAkG
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+HMUfpIBvFSDJ3gyICh3WZlXi/EjJKSZp4A==
+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
+# Label: "GlobalSign Root CA - R2"
+# Serial: 4835703278459682885658125
+# MD5 Fingerprint: 94:14:77:7e:3e:5e:fd:8f:30:bd:41:b0:cf:e7:d0:30
+# SHA1 Fingerprint: 75:e0:ab:b6:13:85:12:27:1c:04:f8:5f:dd:de:38:e4:b7:24:2e:fe
+# SHA256 Fingerprint: ca:42:dd:41:74:5f:d0:b8:1e:b9:02:36:2c:f9:d8:bf:71:9d:a1:bd:1b:1e:fc:94:6f:5b:4c:99:f4:2c:1b:9e
+-----BEGIN CERTIFICATE-----
+MIIDujCCAqKgAwIBAgILBAAAAAABD4Ym5g0wDQYJKoZIhvcNAQEFBQAwTDEgMB4G
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
+# Label: "Verisign Class 3 Public Primary Certification Authority - G3"
+# Serial: 206684696279472310254277870180966723415
+# MD5 Fingerprint: cd:68:b6:a7:c7:c4:ce:75:e0:1d:4f:57:44:61:92:09
+# SHA1 Fingerprint: 13:2d:0d:45:53:4b:69:97:cd:b2:d5:c3:39:e2:55:76:60:9b:5c:c6
+# SHA256 Fingerprint: eb:04:cf:5e:b1:f3:9a:fa:76:2f:2b:b1:20:f2:96:cb:a5:20:c1:b9:7d:b1:58:95:65:b8:1c:b9:a1:7b:72:44
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Subject: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Label: "Entrust.net Premium 2048 Secure Server CA"
+# Serial: 946069240
+# MD5 Fingerprint: ee:29:31:bc:32:7e:9a:e6:e8:b5:f7:51:b4:34:71:90
+# SHA1 Fingerprint: 50:30:06:09:1d:97:d4:f5:ae:39:f7:cb:e7:92:7d:7d:65:2d:34:31
+# SHA256 Fingerprint: 6d:c4:71:72:e0:1c:bc:b0:bf:62:58:0d:89:5f:e2:b8:ac:9a:d4:f8:73:80:1e:0c:10:b9:c8:37:d2:1e:b1:77
+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Subject: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Label: "Baltimore CyberTrust Root"
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+# Issuer: CN=AddTrust External CA Root O=AddTrust AB OU=AddTrust External TTP Network
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+# Label: "AddTrust External Root"
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+# Issuer: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Subject: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Label: "Entrust Root Certification Authority"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GeoTrust Global CA O=GeoTrust Inc.
+# Subject: CN=GeoTrust Global CA O=GeoTrust Inc.
+# Label: "GeoTrust Global CA"
+# Serial: 144470
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GeoTrust Universal CA O=GeoTrust Inc.
+# Subject: CN=GeoTrust Universal CA O=GeoTrust Inc.
+# Label: "GeoTrust Universal CA"
+# Serial: 1
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+# Issuer: CN=GeoTrust Universal CA 2 O=GeoTrust Inc.
+# Subject: CN=GeoTrust Universal CA 2 O=GeoTrust Inc.
+# Label: "GeoTrust Universal CA 2"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=AAA Certificate Services O=Comodo CA Limited
+# Subject: CN=AAA Certificate Services O=Comodo CA Limited
+# Label: "Comodo AAA Services root"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
+# Subject: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
+# Label: "QuoVadis Root CA"
+# Serial: 985026699
+# MD5 Fingerprint: 27:de:36:fe:72:b7:00:03:00:9d:f4:f0:1e:6c:04:24
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2"
+# Serial: 1289
+# MD5 Fingerprint: 5e:39:7b:dd:f8:ba:ec:82:e9:ac:62:ba:0c:54:00:2b
+# SHA1 Fingerprint: ca:3a:fb:cf:12:40:36:4b:44:b2:16:20:88:80:48:39:19:93:7c:f7
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3"
+# Serial: 1478
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=SECOM Trust.net OU=Security Communication RootCA1
+# Subject: O=SECOM Trust.net OU=Security Communication RootCA1
+# Label: "Security Communication Root CA"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Sonera Class2 CA O=Sonera
+# Subject: CN=Sonera Class2 CA O=Sonera
+# Label: "Sonera Class 2 Root CA"
+# Serial: 29
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
+# Subject: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
+# Label: "XRamp Global CA Root"
+# Serial: 107108908803651509692980124233745014957
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
+# Subject: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
+# Label: "Go Daddy Class 2 CA"
+# Serial: 0
+# MD5 Fingerprint: 91:de:06:25:ab:da:fd:32:17:0c:bb:25:17:2a:84:67
+# SHA1 Fingerprint: 27:96:ba:e6:3f:18:01:e2:77:26:1b:a0:d7:77:70:02:8f:20:ee:e4
+# SHA256 Fingerprint: c3:84:6b:f2:4b:9e:93:ca:64:27:4c:0e:c6:7c:1e:cc:5e:02:4f:fc:ac:d2:d7:40:19:35:0e:81:fe:54:6a:e4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
+# Subject: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
+# Label: "Starfield Class 2 CA"
+# Serial: 0
+# MD5 Fingerprint: 32:4a:4b:bb:c8:63:69:9b:be:74:9a:c6:dd:1d:46:24
+# SHA1 Fingerprint: ad:7e:1c:28:b0:64:ef:8f:60:03:40:20:14:c3:d0:e3:37:0e:b5:8a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=Government Root Certification Authority
+# Subject: O=Government Root Certification Authority
+# Label: "Taiwan GRCA"
+# Serial: 42023070807708724159991140556527066870
+# MD5 Fingerprint: 37:85:44:53:32:45:1f:20:f0:f3:95:e1:25:c4:43:4e
+# SHA1 Fingerprint: f4:8b:11:bf:de:ab:be:94:54:20:71:e6:41:de:6b:be:88:2b:40:b9
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root CA"
+# Serial: 17154717934120587862167794914071425081
+# MD5 Fingerprint: 87:ce:0b:7b:2a:0e:49:00:e1:58:71:9b:37:a8:93:72
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root CA"
+# Serial: 10944719598952040374951832963794454346
+# MD5 Fingerprint: 79:e4:a9:84:0d:7d:3a:96:d7:c0:4f:e2:43:4c:89:2e
+# SHA1 Fingerprint: a8:98:5d:3a:65:e5:e5:c4:b2:d7:d6:6d:40:c6:dd:2f:b1:9c:54:36
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert High Assurance EV Root CA"
+# Serial: 3553400076410547919724730734378100087
+# MD5 Fingerprint: d4:74:de:57:5c:39:b2:d3:9c:85:83:c5:c0:65:49:8a
+# SHA1 Fingerprint: 5f:b7:ee:06:33:e2:59:db:ad:0c:4c:9a:e6:d3:8f:1a:61:c7:dc:25
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Class 2 Primary CA O=Certplus
+# Subject: CN=Class 2 Primary CA O=Certplus
+# Label: "Certplus Class 2 Primary CA"
+# Serial: 177770208045934040241468760488327595043
+# MD5 Fingerprint: 88:2c:8c:52:b8:a2:3c:f3:f7:bb:03:ea:ae:ac:42:0b
+# SHA1 Fingerprint: 74:20:74:41:72:9c:dd:92:ec:79:31:d8:23:10:8d:c2:81:92:e2:bb
+# SHA256 Fingerprint: 0f:99:3c:8a:ef:97:ba:af:56:87:14:0e:d5:9a:d1:82:1b:b4:af:ac:f0:aa:9a:58:b5:d5:7a:33:8a:3a:fb:cb
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DST Root CA X3 O=Digital Signature Trust Co.
+# Subject: CN=DST Root CA X3 O=Digital Signature Trust Co.
+# Label: "DST Root CA X3"
+# Serial: 91299735575339953335919266965803778155
+# MD5 Fingerprint: 41:03:52:dc:0f:f7:50:1b:16:f0:02:8e:ba:6f:45:c5
+# SHA1 Fingerprint: da:c9:02:4f:54:d8:f6:df:94:93:5f:b1:73:26:38:ca:6a:d7:7c:13
+# SHA256 Fingerprint: 06:87:26:03:31:a7:24:03:d9:09:f1:05:e6:9b:cf:0d:32:e1:bd:24:93:ff:c6:d9:20:6d:11:bc:d6:77:07:39
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Label: "SwissSign Gold CA - G2"
+# Serial: 13492815561806991280
+# MD5 Fingerprint: 24:77:d9:a8:91:d1:3b:fa:88:2d:c2:ff:f8:cd:33:93
+# SHA1 Fingerprint: d8:c5:38:8a:b7:30:1b:1b:6e:d4:7a:e6:45:25:3a:6f:9f:1a:27:61
+# SHA256 Fingerprint: 62:dd:0b:e9:b9:f5:0a:16:3e:a0:f8:e7:5c:05:3b:1e:ca:57:ea:55:c8:68:8f:64:7c:68:81:f2:c8:35:7b:95
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Label: "SwissSign Silver CA - G2"
+# Serial: 5700383053117599563
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
+# Subject: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
+# Label: "GeoTrust Primary Certification Authority"
+# Serial: 32798226551256963324313806436981982369
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA"
+# Serial: 69529181992039203566298953787712940909
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Class 3 Public Primary Certification Authority - G5"
+# Serial: 33037644167568058970164719475676101450
+# MD5 Fingerprint: cb:17:e4:31:67:3e:e2:09:fe:45:57:93:f3:0a:fa:1c
+# SHA1 Fingerprint: 4e:b6:d5:78:49:9b:1c:cf:5f:58:1e:ad:56:be:3d:9b:67:44:a5:e5
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SecureTrust CA O=SecureTrust Corporation
+# Subject: CN=SecureTrust CA O=SecureTrust Corporation
+# Label: "SecureTrust CA"
+# Serial: 17199774589125277788362757014266862032
+# MD5 Fingerprint: dc:32:c3:a7:6d:25:57:c7:68:09:9d:ea:2d:a9:a2:d1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Secure Global CA O=SecureTrust Corporation
+# Subject: CN=Secure Global CA O=SecureTrust Corporation
+# Label: "Secure Global CA"
+# Serial: 9751836167731051554232119481456978597
+# MD5 Fingerprint: cf:f4:27:0d:d4:ed:dc:65:16:49:6d:3d:da:bf:6e:de
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=COMODO Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO Certification Authority O=COMODO CA Limited
+# Label: "COMODO Certification Authority"
+# Serial: 104350513648249232941998508985834464573
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Subject: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Label: "Network Solutions Certificate Authority"
+# Serial: 116697915152937497490437556386812487904
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Label: "COMODO ECC Certification Authority"
+# Serial: 41578283867086692638256921589707938090
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=OISTE WISeKey Global Root GA CA O=WISeKey OU=Copyright (c) 2005/OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GA CA O=WISeKey OU=Copyright (c) 2005/OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GA CA"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Certigna O=Dhimyotis
+# Subject: CN=Certigna O=Dhimyotis
+# Label: "Certigna"
+# Serial: 18364802974209362175
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Deutsche Telekom Root CA 2 O=Deutsche Telekom AG OU=T-TeleSec Trust Center
+# Subject: CN=Deutsche Telekom Root CA 2 O=Deutsche Telekom AG OU=T-TeleSec Trust Center
+# Label: "Deutsche Telekom Root CA 2"
+# Serial: 38
+# MD5 Fingerprint: 74:01:4a:91:b1:08:c4:58:ce:47:cd:f0:dd:11:53:08
+# SHA1 Fingerprint: 85:a4:08:c0:9c:19:3e:5d:51:58:7d:cd:d6:13:30:fd:8c:de:37:bf
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Cybertrust Global Root O=Cybertrust, Inc
+# Subject: CN=Cybertrust Global Root O=Cybertrust, Inc
+# Label: "Cybertrust Global Root"
+# Serial: 4835703278459682877484360
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Subject: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Label: "ePKI Root Certification Authority"
+# Serial: 28956088682735189655030529057352760477
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=certSIGN OU=certSIGN ROOT CA
+# Subject: O=certSIGN OU=certSIGN ROOT CA
+# Label: "certSIGN ROOT CA"
+# Serial: 35210227249154
+# MD5 Fingerprint: 18:98:c0:d6:e9:3a:fc:f9:b0:f5:0c:f7:4b:01:44:17
+# SHA1 Fingerprint: fa:b7:ee:36:97:26:62:fb:2d:b0:2a:f6:bf:03:fd:e8:7c:4b:2f:9b
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
+# Subject: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
+# Label: "GeoTrust Primary Certification Authority - G3"
+# Serial: 28809105769928564313984085209975885599
+# MD5 Fingerprint: b5:e8:34:36:c9:10:44:58:48:70:6d:2e:83:d4:b8:05
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA - G2"
+# Serial: 71758320672825410020661621085256472406
+# MD5 Fingerprint: 74:9d:ea:60:24:c4:fd:22:53:3e:cc:3a:72:d9:29:4f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA - G3"
+# Serial: 127614157056681299805556476275995414779
+# MD5 Fingerprint: fb:1b:5d:43:8a:94:cd:44:c6:76:f2:43:4b:47:e7:31
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
+# Subject: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
+# Label: "GeoTrust Primary Certification Authority - G2"
+# Serial: 80682863203381065782177908751794619243
+# MD5 Fingerprint: 01:5e:d8:6b:bd:6f:3d:8e:a1:31:f8:12:e0:98:73:6a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Universal Root Certification Authority"
+# Serial: 85209574734084581917763752644031726877
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Class 3 Public Primary Certification Authority - G4"
+# Serial: 63143484348153506665311985501458640051
+# MD5 Fingerprint: 3a:52:e1:e7:fd:6f:3a:e3:6f:f3:6f:99:1b:f9:22:41
+# SHA1 Fingerprint: 22:d5:d8:df:8f:02:31:d1:8d:f7:9d:b7:cf:8a:2d:64:c9:3f:6c:3a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Subject: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Label: "NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny"
+# Serial: 80544274841616
+# MD5 Fingerprint: c5:a1:b7:ff:73:dd:d6:d7:34:32:18:df:fc:3c:ad:88
+# SHA1 Fingerprint: 06:08:3f:59:3f:15:a1:04:a0:69:a4:6b:a9:03:d0:06:b7:97:09:91
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
+# Label: "Staat der Nederlanden Root CA - G2"
+# Serial: 10000012
+# MD5 Fingerprint: 7c:a5:0f:f8:5b:9a:7d:6d:30:ae:54:5a:e3:42:a2:8a
+# SHA1 Fingerprint: 59:af:82:79:91:86:c7:b4:75:07:cb:cf:03:57:46:eb:04:dd:b7:16
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Label: "Hongkong Post Root CA 1"
+# Serial: 1000
+# MD5 Fingerprint: a8:0d:6f:39:78:b9:43:6d:77:42:6d:98:5a:cc:23:ca
+# SHA1 Fingerprint: d6:da:a8:20:8d:09:d2:15:4d:24:b5:2f:cb:34:6e:b2:58:b2:8a:58
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Subject: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Label: "SecureSign RootCA11"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Subject: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Label: "Microsec e-Szigno Root CA 2009"
+# Serial: 14014712776195784473
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Label: "GlobalSign Root CA - R3"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Subject: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Label: "Autoridad de Certificacion Firmaprofesional CIF A62634068"
+# Serial: 6047274297262753887
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Izenpe.com O=IZENPE S.A.
+# Subject: CN=Izenpe.com O=IZENPE S.A.
+# Label: "Izenpe.com"
+# Serial: 917563065490389241595536686991402621
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
+# Subject: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
+# Label: "Chambers of Commerce Root - 2008"
+# Serial: 11806822484801597146
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+-----BEGIN CERTIFICATE-----
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+# Label: "Global Chambersign Root - 2008"
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+# Subject: CN=Go Daddy Root Certificate Authority - G2 O=GoDaddy.com, Inc.
+# Label: "Go Daddy Root Certificate Authority - G2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Starfield Root Certificate Authority - G2 O=Starfield Technologies, Inc.
+# Subject: CN=Starfield Root Certificate Authority - G2 O=Starfield Technologies, Inc.
+# Label: "Starfield Root Certificate Authority - G2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Starfield Services Root Certificate Authority - G2 O=Starfield Technologies, Inc.
+# Subject: CN=Starfield Services Root Certificate Authority - G2 O=Starfield Technologies, Inc.
+# Label: "Starfield Services Root Certificate Authority - G2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=AffirmTrust Commercial O=AffirmTrust
+# Subject: CN=AffirmTrust Commercial O=AffirmTrust
+# Label: "AffirmTrust Commercial"
+# Serial: 8608355977964138876
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+# SHA1 Fingerprint: f9:b5:b6:32:45:5f:9c:be:ec:57:5f:80:dc:e9:6e:2c:c7:b2:78:b7
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=AffirmTrust Networking O=AffirmTrust
+# Subject: CN=AffirmTrust Networking O=AffirmTrust
+# Label: "AffirmTrust Networking"
+# Serial: 8957382827206547757
+# MD5 Fingerprint: 42:65:ca:be:01:9a:9a:4c:a9:8c:41:49:cd:c0:d5:7f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=AffirmTrust Premium O=AffirmTrust
+# Subject: CN=AffirmTrust Premium O=AffirmTrust
+# Label: "AffirmTrust Premium"
+# Serial: 7893706540734352110
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Subject: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Label: "AffirmTrust Premium ECC"
+# Serial: 8401224907861490260
+# MD5 Fingerprint: 64:b0:09:55:cf:b1:d5:99:e2:be:13:ab:a6:5d:ea:4d
+# SHA1 Fingerprint: b8:23:6b:00:2f:1d:16:86:53:01:55:6c:11:a4:37:ca:eb:ff:c3:bb
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Subject: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Label: "Certum Trusted Network CA"
+# Serial: 279744
+# MD5 Fingerprint: d5:e9:81:40:c5:18:69:fc:46:2c:89:75:62:0f:aa:78
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Root Certification Authority"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Subject: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Label: "Security Communication RootCA2"
+# Serial: 0
+# MD5 Fingerprint: 6c:39:7d:a4:0e:55:59:b2:3f:d6:41:b1:12:50:de:43
+# SHA1 Fingerprint: 5f:3b:8c:f2:f8:10:b3:7d:78:b4:ce:ec:19:19:c3:73:34:b9:c7:74
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+-----BEGIN CERTIFICATE-----
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+# Label: "Hellenic Academic and Research Institutions RootCA 2011"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Actalis Authentication Root CA O=Actalis S.p.A./03358520967
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+# Label: "Actalis Authentication Root CA"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=Trustis Limited OU=Trustis FPS Root CA
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+# Label: "Trustis FPS Root CA"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 2 Root CA"
+# Serial: 2
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+# Issuer: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 3 Root CA"
+# Serial: 2
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Subject: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Label: "T-TeleSec GlobalRoot Class 3"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
+# Subject: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
+# Label: "EE Certification Centre Root CA"
+# Serial: 112324828676200291871926431888494945866
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 2009"
+# Serial: 623603
+# MD5 Fingerprint: cd:e0:25:69:8d:47:ac:9c:89:35:90:f7:fd:51:3d:2f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 EV 2009"
+# Serial: 623604
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=CA Disig Root R2 O=Disig a.s.
+# Subject: CN=CA Disig Root R2 O=Disig a.s.
+# Label: "CA Disig Root R2"
+# Serial: 10572350602393338211
+# MD5 Fingerprint: 26:01:fb:d8:27:a7:17:9a:45:54:38:1a:43:01:3b:03
+# SHA1 Fingerprint: b5:61:eb:ea:a4:de:e4:25:4b:69:1a:98:a5:57:47:c2:34:c7:d9:71
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=ACCVRAIZ1 O=ACCV OU=PKIACCV
+# Subject: CN=ACCVRAIZ1 O=ACCV OU=PKIACCV
+# Label: "ACCVRAIZ1"
+# Serial: 6828503384748696800
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Global Root CA"
+# Serial: 3262
+# MD5 Fingerprint: f9:03:7e:cf:e6:9e:3c:73:7a:2a:90:07:69:ff:2b:96
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Subject: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Label: "TeliaSonera Root CA v1"
+# Serial: 199041966741090107964904287217786801558
+# MD5 Fingerprint: 37:41:49:1b:18:56:9a:26:f5:ad:c2:66:fb:40:a5:4c
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Subject: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Label: "E-Tugra Certification Authority"
+# Serial: 7667447206703254355
+# MD5 Fingerprint: b8:a1:03:63:b0:bd:21:71:70:8a:6f:13:3a:bb:79:49
+# SHA1 Fingerprint: 51:c6:e7:08:49:06:6e:f3:92:d4:5c:a0:0d:6d:a3:62:8f:c3:52:39
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Subject: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Label: "T-TeleSec GlobalRoot Class 2"
+# Serial: 1
+# MD5 Fingerprint: 2b:9b:9e:e4:7b:6c:1f:00:72:1a:cc:c1:77:79:df:6a
+# SHA1 Fingerprint: 59:0d:2d:7d:88:4f:40:2e:61:7e:a5:62:32:17:65:cf:17:d8:94:e9
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Atos TrustedRoot 2011 O=Atos
+# Subject: CN=Atos TrustedRoot 2011 O=Atos
+# Label: "Atos TrustedRoot 2011"
+# Serial: 6643877497813316402
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 1 G3"
+# Serial: 687049649626669250736271037606554624078720034195
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2 G3"
+# Serial: 390156079458959257446133169266079962026824725800
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3 G3"
+# Serial: 268090761170461462463995952157327242137089239581
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G2"
+# Serial: 15385348160840213938643033620894905419
+# MD5 Fingerprint: 92:38:b9:f8:63:24:82:65:2c:57:33:e6:fe:81:8f:9d
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G3"
+# Serial: 15459312981008553731928384953135426796
+# MD5 Fingerprint: 7c:7f:65:31:0c:81:df:8d:ba:3e:99:e2:5c:ad:6e:fb
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G2"
+# Serial: 4293743540046975378534879503202253541
+# MD5 Fingerprint: e4:a6:8a:c8:54:ac:52:42:46:0a:fd:72:48:1b:2a:44
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G3"
+# Serial: 7089244469030293291760083333884364146
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Trusted Root G4"
+# Serial: 7451500558977370777930084869016614236
+# MD5 Fingerprint: 78:f2:fc:aa:60:1f:2f:b4:eb:c9:37:ba:53:2e:75:49
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Label: "COMODO RSA Certification Authority"
+# Serial: 101909084537582093308941363524873193117
+# MD5 Fingerprint: 1b:31:b0:71:40:36:cc:14:36:91:ad:c4:3e:fd:ec:18
+# SHA1 Fingerprint: af:e5:d2:44:a8:d1:19:42:30:ff:47:9f:e2:f8:97:bb:cd:7a:8c:b4
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Label: "USERTrust RSA Certification Authority"
+# Serial: 2645093764781058787591871645665788717
+# MD5 Fingerprint: 1b:fe:69:d1:91:b7:19:33:a3:72:a8:0f:e1:55:e5:b5
+# SHA1 Fingerprint: 2b:8f:1b:57:33:0d:bb:a2:d0:7a:6c:51:f7:0e:e9:0d:da:b9:ad:8e
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Label: "USERTrust ECC Certification Authority"
+# Serial: 123013823720199481456569720443997572134
+# MD5 Fingerprint: fa:68:bc:d9:b5:7f:ad:fd:c9:1d:06:83:28:cc:24:c1
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
+# Label: "GlobalSign ECC Root CA - R4"
+# Serial: 14367148294922964480859022125800977897474
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Label: "GlobalSign ECC Root CA - R5"
+# Serial: 32785792099990507226680698011560947931244
+# MD5 Fingerprint: 9f:ad:3b:1c:02:1e:8a:ba:17:74:38:81:0c:a2:bc:08
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
+# Label: "Staat der Nederlanden Root CA - G3"
+# Serial: 10003001
+# MD5 Fingerprint: 0b:46:67:07:db:10:2f:19:8c:35:50:60:d1:0b:f4:37
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Label: "Staat der Nederlanden EV Root CA"
+# Serial: 10000013
+# MD5 Fingerprint: fc:06:af:7b:e8:1a:f1:9a:b4:e8:d2:70:1f:c0:f5:ba
+# SHA1 Fingerprint: 76:e2:7e:c1:4f:db:82:c1:c0:a6:75:b5:05:be:3d:29:b4:ed:db:bb
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
+# Subject: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
+# Label: "IdenTrust Commercial Root CA 1"
+# Serial: 13298821034946342390520003877796839426
+# MD5 Fingerprint: b3:3e:77:73:75:ee:a0:d3:e3:7e:49:63:49:59:bb:c7
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
+# Subject: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
+# Label: "IdenTrust Public Sector Root CA 1"
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+# Issuer: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G2"
+# Serial: 1246989352
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - EC1"
+# Serial: 51543124481930649114116133369
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Subject: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Label: "CFCA EV ROOT"
+# Serial: 407555286
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GB CA"
+# Serial: 157768595616588414422159278966750757568
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SZAFIR ROOT CA2 O=Krajowa Izba Rozliczeniowa S.A.
+# Subject: CN=SZAFIR ROOT CA2 O=Krajowa Izba Rozliczeniowa S.A.
+# Label: "SZAFIR ROOT CA2"
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+# Issuer: CN=Hellenic Academic and Research Institutions RootCA 2015 O=Hellenic Academic and Research Institutions Cert. Authority
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+# Label: "Hellenic Academic and Research Institutions RootCA 2015"
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+# Issuer: CN=Hellenic Academic and Research Institutions ECC RootCA 2015 O=Hellenic Academic and Research Institutions Cert. Authority
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+# Label: "Hellenic Academic and Research Institutions ECC RootCA 2015"
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+# Label: "ISRG Root X1"
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 1 O=Amazon
+# Subject: CN=Amazon Root CA 1 O=Amazon
+# Label: "Amazon Root CA 1"
+# Serial: 143266978916655856878034712317230054538369994
+# MD5 Fingerprint: 43:c6:bf:ae:ec:fe:ad:2f:18:c6:88:68:30:fc:c8:e6
+# SHA1 Fingerprint: 8d:a7:f9:65:ec:5e:fc:37:91:0f:1c:6e:59:fd:c1:cc:6a:6e:de:16
+# SHA256 Fingerprint: 8e:cd:e6:88:4f:3d:87:b1:12:5b:a3:1a:c3:fc:b1:3d:70:16:de:7f:57:cc:90:4f:e1:cb:97:c6:ae:98:19:6e
+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Amazon Root CA 2 O=Amazon
+# Subject: CN=Amazon Root CA 2 O=Amazon
+# Label: "Amazon Root CA 2"
+# Serial: 143266982885963551818349160658925006970653239
+# MD5 Fingerprint: c8:e5:8d:ce:a8:42:e2:7a:c0:2a:5c:7c:9e:26:bf:66
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 3 O=Amazon
+# Subject: CN=Amazon Root CA 3 O=Amazon
+# Label: "Amazon Root CA 3"
+# Serial: 143266986699090766294700635381230934788665930
+# MD5 Fingerprint: a0:d4:ef:0b:f7:b5:d8:49:95:2a:ec:f5:c4:fc:81:87
+# SHA1 Fingerprint: 0d:44:dd:8c:3c:8c:1a:1a:58:75:64:81:e9:0f:2e:2a:ff:b3:d2:6e
+# SHA256 Fingerprint: 18:ce:6c:fe:7b:f1:4e:60:b2:e3:47:b8:df:e8:68:cb:31:d0:2e:bb:3a:da:27:15:69:f5:03:43:b4:6d:b3:a4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 4 O=Amazon
+# Subject: CN=Amazon Root CA 4 O=Amazon
+# Label: "Amazon Root CA 4"
+# Serial: 143266989758080763974105200630763877849284878
+# MD5 Fingerprint: 89:bc:27:d5:eb:17:8d:06:6a:69:d5:fd:89:47:b4:cd
+# SHA1 Fingerprint: f6:10:84:07:d6:f8:bb:67:98:0c:c2:e2:44:c2:eb:ae:1c:ef:63:be
+# SHA256 Fingerprint: e3:5d:28:41:9e:d0:20:25:cf:a6:90:38:cd:62:39:62:45:8d:a5:c6:95:fb:de:a3:c2:2b:0b:fb:25:89:70:92
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
+# Subject: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
+# Label: "LuxTrust Global Root 2"
+# Serial: 59914338225734147123941058376788110305822489521
+# MD5 Fingerprint: b2:e1:09:00:61:af:f7:f1:91:6f:c4:ad:8d:5e:3b:7c
+# SHA1 Fingerprint: 1e:0e:56:19:0a:d1:8b:25:98:b2:04:44:ff:66:8a:04:17:99:5f:3f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Subject: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Label: "TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1"
+# Serial: 1
+# MD5 Fingerprint: dc:00:81:dc:69:2f:3e:2f:b0:3b:f6:3d:5a:91:8e:49
+# SHA1 Fingerprint: 31:43:64:9b:ec:ce:27:ec:ed:3a:3f:0b:8f:0d:e4:e8:91:dd:ee:ca
+# SHA256 Fingerprint: 46:ed:c3:68:90:46:d5:3a:45:3f:b3:10:4a:b8:0d:ca:ec:65:8b:26:60:ea:16:29:dd:7e:86:79:90:64:87:16
+-----BEGIN CERTIFICATE-----
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+# Label: "GDCA TrustAUTH R5 ROOT"
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+# Label: "TrustCor RootCert CA-1"
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+-----BEGIN CERTIFICATE-----
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+# Label: "TrustCor RootCert CA-2"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
+# Subject: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
+# Label: "TrustCor ECA-1"
+# Serial: 9548242946988625984
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Label: "SSL.com Root Certification Authority RSA"
+# Serial: 8875640296558310041
+# MD5 Fingerprint: 86:69:12:c0:70:f1:ec:ac:ac:c2:d5:bc:a5:5b:a1:29
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com Root Certification Authority ECC"
+# Serial: 8495723813297216424
+# MD5 Fingerprint: 2e:da:e4:39:7f:9c:8f:37:d1:70:9f:26:17:51:3a:8e
+# SHA1 Fingerprint: c3:19:7c:39:24:e6:54:af:1b:c4:ab:20:95:7a:e2:c3:0e:13:02:6a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority RSA R2"
+# Serial: 6248227494352943350
+# MD5 Fingerprint: e1:1e:31:58:1a:ae:54:53:02:f6:17:6a:11:7b:4d:95
+# SHA1 Fingerprint: 74:3a:f0:52:9b:d0:32:a0:f4:4a:83:cd:d4:ba:a9:7b:7c:2e:c4:9a
+# SHA256 Fingerprint: 2e:7b:f1:6c:c2:24:85:a7:bb:e2:aa:86:96:75:07:61:b0:ae:39:be:3b:2f:e9:d0:cc:6d:4e:f7:34:91:42:5c
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority ECC"
+# Serial: 3182246526754555285
+# MD5 Fingerprint: 59:53:22:65:83:42:01:54:c0:ce:42:b9:5a:7c:f2:90
+# SHA1 Fingerprint: 4c:dd:51:a3:d1:f5:20:32:14:b0:c6:c5:32:23:03:91:c7:46:42:6d
+# SHA256 Fingerprint: 22:a2:c1:f7:bd:ed:70:4c:c1:e7:01:b5:f4:08:c3:10:88:0f:e9:56:b5:de:2a:4a:44:f9:9c:87:3a:25:a7:c8
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Label: "GlobalSign Root CA - R6"
+# Serial: 1417766617973444989252670301619537
+# MD5 Fingerprint: 4f:dd:07:e4:d4:22:64:39:1e:0c:37:42:ea:d1:c6:ae
+# SHA1 Fingerprint: 80:94:64:0e:b5:a7:a1:ca:11:9c:1f:dd:d5:9f:81:02:63:a7:fb:d1
+# SHA256 Fingerprint: 2c:ab:ea:fe:37:d0:6c:a2:2a:ba:73:91:c0:03:3d:25:98:29:52:c4:53:64:73:49:76:3a:3a:b5:ad:6c:cf:69
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GC CA"
+# Serial: 44084345621038548146064804565436152554
+# MD5 Fingerprint: a9:d6:b9:2d:2f:93:64:f8:a5:69:ca:91:e9:68:07:23
+# SHA1 Fingerprint: e0:11:84:5e:34:de:be:88:81:b9:9c:f6:16:26:d1:96:1f:c3:b9:31
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GTS Root R1 O=Google Trust Services LLC
+# Subject: CN=GTS Root R1 O=Google Trust Services LLC
+# Label: "GTS Root R1"
+# Serial: 146587175971765017618439757810265552097
+# MD5 Fingerprint: 82:1a:ef:d4:d2:4a:f2:9f:e2:3d:97:06:14:70:72:85
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GTS Root R2 O=Google Trust Services LLC
+# Subject: CN=GTS Root R2 O=Google Trust Services LLC
+# Label: "GTS Root R2"
+# Serial: 146587176055767053814479386953112547951
+# MD5 Fingerprint: 44:ed:9a:0e:a4:09:3b:00:f2:ae:4c:a3:c6:61:b0:8b
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GTS Root R3 O=Google Trust Services LLC
+# Subject: CN=GTS Root R3 O=Google Trust Services LLC
+# Label: "GTS Root R3"
+# Serial: 146587176140553309517047991083707763997
+# MD5 Fingerprint: 1a:79:5b:6b:04:52:9c:5d:c7:74:33:1b:25:9a:f9:25
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GTS Root R4 O=Google Trust Services LLC
+# Subject: CN=GTS Root R4 O=Google Trust Services LLC
+# Label: "GTS Root R4"
+# Serial: 146587176229350439916519468929765261721
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=UCA Global G2 Root O=UniTrust
+# Subject: CN=UCA Global G2 Root O=UniTrust
+# Label: "UCA Global G2 Root"
+# Serial: 124779693093741543919145257850076631279
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=UCA Extended Validation Root O=UniTrust
+# Subject: CN=UCA Extended Validation Root O=UniTrust
+# Label: "UCA Extended Validation Root"
+# Serial: 106100277556486529736699587978573607008
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Subject: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Label: "Certigna Root CA"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign Root CA - G1"
+# Serial: 235931866688319308814040
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign ECC Root CA - G3"
+# Serial: 287880440101571086945156
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign Root CA - C1"
+# Serial: 825510296613316004955058
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign ECC Root CA - C3"
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+# Issuer: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Label: "Hongkong Post Root CA 3"
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+-----BEGIN CERTIFICATE-----
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+gZ6voJmtvqkBZss4HTzfQx/0TW60uhdG/H39h4F5ag0zD/ov+BS5gLNdTaqX4fnk
+GMX41TiMJjz98iji7lpJiCzfeT2OnpA8vUFKOt1b9pq0zj8lMH8yfaIDlNDceqFS
+3m6TjRgm/VWsvY+b0s+v54Ysyx8Jb6NvqYTUc79NoXQbTiNg8swOqn+knEwlqLJm
+Ozj/2ZQw9nKEvmhVEA/GcywWaZMH/rFF7buiVWqw2rVKAiUnhde3t4ZEFolsgCs+
+l6mc1X5VTMbeRRAc6uk7nwNT7u56AQIWeNTowr5GdogTPyK7SBIdUgC0An4hGh6c
+JfTzPV4e0hz5sy229zdcxsshTrD3mUcYhcErulWuBurQB7Lcq9CClnXO0lD+mefP
+L5/ndtFhKvshuzHQqp9HpLIiyhY6UFfEW0NnxWViA0kB60PZ2Pierc+xYw5F9KBa
+LJstxabArahH9CdMOA0uG0k7UvToiIMrVCjU8jVStDKDYmlkDJGcn5fqdBb9HxEG
+mpv0
+-----END CERTIFICATE-----
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/core.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/core.py
new file mode 100644
index 00000000..7271acf4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/certifi/core.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+"""
+certifi.py
+~~~~~~~~~~
+
+This module returns the installation location of cacert.pem.
+"""
+import os
+
+
+def where():
+    f = os.path.dirname(__file__)
+
+    return os.path.join(f, 'cacert.pem')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__init__.py
new file mode 100644
index 00000000..0f9f820e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__init__.py
@@ -0,0 +1,39 @@
+######################## BEGIN LICENSE BLOCK ########################
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+
+from .compat import PY2, PY3
+from .universaldetector import UniversalDetector
+from .version import __version__, VERSION
+
+
+def detect(byte_str):
+    """
+    Detect the encoding of the given byte string.
+
+    :param byte_str:     The byte sequence to examine.
+    :type byte_str:      ``bytes`` or ``bytearray``
+    """
+    if not isinstance(byte_str, bytearray):
+        if not isinstance(byte_str, bytes):
+            raise TypeError('Expected object of type bytes or bytearray, got: '
+                            '{0}'.format(type(byte_str)))
+        else:
+            byte_str = bytearray(byte_str)
+    detector = UniversalDetector()
+    detector.feed(byte_str)
+    return detector.close()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..aabe0a7c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/big5freq.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/big5freq.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/big5freq.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/big5prober.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/big5prober.cpython-37.pyc
new file mode 100644
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--- /dev/null
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/chardistribution.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/chardistribution.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/chardistribution.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/charsetgroupprober.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/charsetgroupprober.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/charsetprober.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/charsetprober.cpython-37.pyc
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--- /dev/null
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/codingstatemachine.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/codingstatemachine.cpython-37.pyc
new file mode 100644
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--- /dev/null
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/compat.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/cp949prober.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/cp949prober.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/universaldetector.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/universaldetector.cpython-37.pyc
new file mode 100644
index 00000000..36584e2d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/universaldetector.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/utf8prober.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/utf8prober.cpython-37.pyc
new file mode 100644
index 00000000..5071ef3d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/utf8prober.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/version.cpython-37.pyc
new file mode 100644
index 00000000..951e1569
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/__pycache__/version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5freq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5freq.py
new file mode 100644
index 00000000..38f32517
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5freq.py
@@ -0,0 +1,386 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Big5 frequency table
+# by Taiwan's Mandarin Promotion Council
+# <http://www.edu.tw:81/mandr/>
+#
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Ideal Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+BIG5_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+#Char to FreqOrder table
+BIG5_TABLE_SIZE = 5376
+
+BIG5_CHAR_TO_FREQ_ORDER = (
+   1,1801,1506, 255,1431, 198,   9,  82,   6,5008, 177, 202,3681,1256,2821, 110, #   16
+3814,  33,3274, 261,  76,  44,2114,  16,2946,2187,1176, 659,3971,  26,3451,2653, #   32
+1198,3972,3350,4202, 410,2215, 302, 590, 361,1964,   8, 204,  58,4510,5009,1932, #   48
+  63,5010,5011, 317,1614,  75, 222, 159,4203,2417,1480,5012,3555,3091, 224,2822, #   64
+3682,   3,  10,3973,1471,  29,2787,1135,2866,1940, 873, 130,3275,1123, 312,5013, #   80
+4511,2052, 507, 252, 682,5014, 142,1915, 124, 206,2947,  34,3556,3204,  64, 604, #   96
+5015,2501,1977,1978, 155,1991, 645, 641,1606,5016,3452, 337,  72, 406,5017,  80, #  112
+ 630, 238,3205,1509, 263, 939,1092,2654, 756,1440,1094,3453, 449,  69,2987, 591, #  128
+ 179,2096, 471, 115,2035,1844,  60,  50,2988, 134, 806,1869, 734,2036,3454, 180, #  144
+ 995,1607, 156, 537,2907, 688,5018, 319,1305, 779,2145, 514,2379, 298,4512, 359, #  160
+2502,  90,2716,1338, 663,  11, 906,1099,2553,  20,2441, 182, 532,1716,5019, 732, #  176
+1376,4204,1311,1420,3206,  25,2317,1056, 113, 399, 382,1950, 242,3455,2474, 529, #  192
+3276, 475,1447,3683,5020, 117,  21, 656, 810,1297,2300,2334,3557,5021, 126,4205, #  208
+ 706, 456, 150, 613,4513,  71,1118,2037,4206, 145,3092,  85, 835, 486,2115,1246, #  224
+1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,5022,2128,2359, 347,3815, 221, #  240
+3558,3135,5023,1956,1153,4207,  83, 296,1199,3093, 192, 624,  93,5024, 822,1898, #  256
+2823,3136, 795,2065, 991,1554,1542,1592,  27,  43,2867, 859, 139,1456, 860,4514, #  272
+ 437, 712,3974, 164,2397,3137, 695, 211,3037,2097, 195,3975,1608,3559,3560,3684, #  288
+3976, 234, 811,2989,2098,3977,2233,1441,3561,1615,2380, 668,2077,1638, 305, 228, #  304
+1664,4515, 467, 415,5025, 262,2099,1593, 239, 108, 300, 200,1033, 512,1247,2078, #  320
+5026,5027,2176,3207,3685,2682, 593, 845,1062,3277,  88,1723,2038,3978,1951, 212, #  336
+ 266, 152, 149, 468,1899,4208,4516,  77, 187,5028,3038,  37,   5,2990,5029,3979, #  352
+5030,5031,  39,2524,4517,2908,3208,2079,  55, 148,  74,4518, 545, 483,1474,1029, #  368
+1665, 217,1870,1531,3138,1104,2655,4209,  24, 172,3562, 900,3980,3563,3564,4519, #  384
+  32,1408,2824,1312, 329, 487,2360,2251,2717, 784,2683,   4,3039,3351,1427,1789, #  400
+ 188, 109, 499,5032,3686,1717,1790, 888,1217,3040,4520,5033,3565,5034,3352,1520, #  416
+3687,3981, 196,1034, 775,5035,5036, 929,1816, 249, 439,  38,5037,1063,5038, 794, #  432
+3982,1435,2301,  46, 178,3278,2066,5039,2381,5040, 214,1709,4521, 804,  35, 707, #  448
+ 324,3688,1601,2554, 140, 459,4210,5041,5042,1365, 839, 272, 978,2262,2580,3456, #  464
+2129,1363,3689,1423, 697, 100,3094,  48,  70,1231, 495,3139,2196,5043,1294,5044, #  480
+2080, 462, 586,1042,3279, 853, 256, 988, 185,2382,3457,1698, 434,1084,5045,3458, #  496
+ 314,2625,2788,4522,2335,2336, 569,2285, 637,1817,2525, 757,1162,1879,1616,3459, #  512
+ 287,1577,2116, 768,4523,1671,2868,3566,2526,1321,3816, 909,2418,5046,4211, 933, #  528
+3817,4212,2053,2361,1222,4524, 765,2419,1322, 786,4525,5047,1920,1462,1677,2909, #  544
+1699,5048,4526,1424,2442,3140,3690,2600,3353,1775,1941,3460,3983,4213, 309,1369, #  560
+1130,2825, 364,2234,1653,1299,3984,3567,3985,3986,2656, 525,1085,3041, 902,2001, #  576
+1475, 964,4527, 421,1845,1415,1057,2286, 940,1364,3141, 376,4528,4529,1381,   7, #  592
+2527, 983,2383, 336,1710,2684,1846, 321,3461, 559,1131,3042,2752,1809,1132,1313, #  608
+ 265,1481,1858,5049, 352,1203,2826,3280, 167,1089, 420,2827, 776, 792,1724,3568, #  624
+4214,2443,3281,5050,4215,5051, 446, 229, 333,2753, 901,3818,1200,1557,4530,2657, #  640
+1921, 395,2754,2685,3819,4216,1836, 125, 916,3209,2626,4531,5052,5053,3820,5054, #  656
+5055,5056,4532,3142,3691,1133,2555,1757,3462,1510,2318,1409,3569,5057,2146, 438, #  672
+2601,2910,2384,3354,1068, 958,3043, 461, 311,2869,2686,4217,1916,3210,4218,1979, #  688
+ 383, 750,2755,2627,4219, 274, 539, 385,1278,1442,5058,1154,1965, 384, 561, 210, #  704
+  98,1295,2556,3570,5059,1711,2420,1482,3463,3987,2911,1257, 129,5060,3821, 642, #  720
+ 523,2789,2790,2658,5061, 141,2235,1333,  68, 176, 441, 876, 907,4220, 603,2602, #  736
+ 710, 171,3464, 404, 549,  18,3143,2398,1410,3692,1666,5062,3571,4533,2912,4534, #  752
+5063,2991, 368,5064, 146, 366,  99, 871,3693,1543, 748, 807,1586,1185,  22,2263, #  768
+ 379,3822,3211,5065,3212, 505,1942,2628,1992,1382,2319,5066, 380,2362, 218, 702, #  784
+1818,1248,3465,3044,3572,3355,3282,5067,2992,3694, 930,3283,3823,5068,  59,5069, #  800
+ 585, 601,4221, 497,3466,1112,1314,4535,1802,5070,1223,1472,2177,5071, 749,1837, #  816
+ 690,1900,3824,1773,3988,1476, 429,1043,1791,2236,2117, 917,4222, 447,1086,1629, #  832
+5072, 556,5073,5074,2021,1654, 844,1090, 105, 550, 966,1758,2828,1008,1783, 686, #  848
+1095,5075,2287, 793,1602,5076,3573,2603,4536,4223,2948,2302,4537,3825, 980,2503, #  864
+ 544, 353, 527,4538, 908,2687,2913,5077, 381,2629,1943,1348,5078,1341,1252, 560, #  880
+3095,5079,3467,2870,5080,2054, 973, 886,2081, 143,4539,5081,5082, 157,3989, 496, #  896
+4224,  57, 840, 540,2039,4540,4541,3468,2118,1445, 970,2264,1748,1966,2082,4225, #  912
+3144,1234,1776,3284,2829,3695, 773,1206,2130,1066,2040,1326,3990,1738,1725,4226, #  928
+ 279,3145,  51,1544,2604, 423,1578,2131,2067, 173,4542,1880,5083,5084,1583, 264, #  944
+ 610,3696,4543,2444, 280, 154,5085,5086,5087,1739, 338,1282,3096, 693,2871,1411, #  960
+1074,3826,2445,5088,4544,5089,5090,1240, 952,2399,5091,2914,1538,2688, 685,1483, #  976
+4227,2475,1436, 953,4228,2055,4545, 671,2400,  79,4229,2446,3285, 608, 567,2689, #  992
+3469,4230,4231,1691, 393,1261,1792,2401,5092,4546,5093,5094,5095,5096,1383,1672, # 1008
+3827,3213,1464, 522,1119, 661,1150, 216, 675,4547,3991,1432,3574, 609,4548,2690, # 1024
+2402,5097,5098,5099,4232,3045,   0,5100,2476, 315, 231,2447, 301,3356,4549,2385, # 1040
+5101, 233,4233,3697,1819,4550,4551,5102,  96,1777,1315,2083,5103, 257,5104,1810, # 1056
+3698,2718,1139,1820,4234,2022,1124,2164,2791,1778,2659,5105,3097, 363,1655,3214, # 1072
+5106,2993,5107,5108,5109,3992,1567,3993, 718, 103,3215, 849,1443, 341,3357,2949, # 1088
+1484,5110,1712, 127,  67, 339,4235,2403, 679,1412, 821,5111,5112, 834, 738, 351, # 1104
+2994,2147, 846, 235,1497,1881, 418,1993,3828,2719, 186,1100,2148,2756,3575,1545, # 1120
+1355,2950,2872,1377, 583,3994,4236,2581,2995,5113,1298,3699,1078,2557,3700,2363, # 1136
+  78,3829,3830, 267,1289,2100,2002,1594,4237, 348, 369,1274,2197,2178,1838,4552, # 1152
+1821,2830,3701,2757,2288,2003,4553,2951,2758, 144,3358, 882,4554,3995,2759,3470, # 1168
+4555,2915,5114,4238,1726, 320,5115,3996,3046, 788,2996,5116,2831,1774,1327,2873, # 1184
+3997,2832,5117,1306,4556,2004,1700,3831,3576,2364,2660, 787,2023, 506, 824,3702, # 1200
+ 534, 323,4557,1044,3359,2024,1901, 946,3471,5118,1779,1500,1678,5119,1882,4558, # 1216
+ 165, 243,4559,3703,2528, 123, 683,4239, 764,4560,  36,3998,1793, 589,2916, 816, # 1232
+ 626,1667,3047,2237,1639,1555,1622,3832,3999,5120,4000,2874,1370,1228,1933, 891, # 1248
+2084,2917, 304,4240,5121, 292,2997,2720,3577, 691,2101,4241,1115,4561, 118, 662, # 1264
+5122, 611,1156, 854,2386,1316,2875,   2, 386, 515,2918,5123,5124,3286, 868,2238, # 1280
+1486, 855,2661, 785,2216,3048,5125,1040,3216,3578,5126,3146, 448,5127,1525,5128, # 1296
+2165,4562,5129,3833,5130,4242,2833,3579,3147, 503, 818,4001,3148,1568, 814, 676, # 1312
+1444, 306,1749,5131,3834,1416,1030, 197,1428, 805,2834,1501,4563,5132,5133,5134, # 1328
+1994,5135,4564,5136,5137,2198,  13,2792,3704,2998,3149,1229,1917,5138,3835,2132, # 1344
+5139,4243,4565,2404,3580,5140,2217,1511,1727,1120,5141,5142, 646,3836,2448, 307, # 1360
+5143,5144,1595,3217,5145,5146,5147,3705,1113,1356,4002,1465,2529,2530,5148, 519, # 1376
+5149, 128,2133,  92,2289,1980,5150,4003,1512, 342,3150,2199,5151,2793,2218,1981, # 1392
+3360,4244, 290,1656,1317, 789, 827,2365,5152,3837,4566, 562, 581,4004,5153, 401, # 1408
+4567,2252,  94,4568,5154,1399,2794,5155,1463,2025,4569,3218,1944,5156, 828,1105, # 1424
+4245,1262,1394,5157,4246, 605,4570,5158,1784,2876,5159,2835, 819,2102, 578,2200, # 1440
+2952,5160,1502, 436,3287,4247,3288,2836,4005,2919,3472,3473,5161,2721,2320,5162, # 1456
+5163,2337,2068,  23,4571, 193, 826,3838,2103, 699,1630,4248,3098, 390,1794,1064, # 1472
+3581,5164,1579,3099,3100,1400,5165,4249,1839,1640,2877,5166,4572,4573, 137,4250, # 1488
+ 598,3101,1967, 780, 104, 974,2953,5167, 278, 899, 253, 402, 572, 504, 493,1339, # 1504
+5168,4006,1275,4574,2582,2558,5169,3706,3049,3102,2253, 565,1334,2722, 863,  41, # 1520
+5170,5171,4575,5172,1657,2338,  19, 463,2760,4251, 606,5173,2999,3289,1087,2085, # 1536
+1323,2662,3000,5174,1631,1623,1750,4252,2691,5175,2878, 791,2723,2663,2339, 232, # 1552
+2421,5176,3001,1498,5177,2664,2630, 755,1366,3707,3290,3151,2026,1609, 119,1918, # 1568
+3474, 862,1026,4253,5178,4007,3839,4576,4008,4577,2265,1952,2477,5179,1125, 817, # 1584
+4254,4255,4009,1513,1766,2041,1487,4256,3050,3291,2837,3840,3152,5180,5181,1507, # 1600
+5182,2692, 733,  40,1632,1106,2879, 345,4257, 841,2531, 230,4578,3002,1847,3292, # 1616
+3475,5183,1263, 986,3476,5184, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562, # 1632
+4010,4011,2954, 967,2761,2665,1349, 592,2134,1692,3361,3003,1995,4258,1679,4012, # 1648
+1902,2188,5185, 739,3708,2724,1296,1290,5186,4259,2201,2202,1922,1563,2605,2559, # 1664
+1871,2762,3004,5187, 435,5188, 343,1108, 596,  17,1751,4579,2239,3477,3709,5189, # 1680
+4580, 294,3582,2955,1693, 477, 979, 281,2042,3583, 643,2043,3710,2631,2795,2266, # 1696
+1031,2340,2135,2303,3584,4581, 367,1249,2560,5190,3585,5191,4582,1283,3362,2005, # 1712
+ 240,1762,3363,4583,4584, 836,1069,3153, 474,5192,2149,2532, 268,3586,5193,3219, # 1728
+1521,1284,5194,1658,1546,4260,5195,3587,3588,5196,4261,3364,2693,1685,4262, 961, # 1744
+1673,2632, 190,2006,2203,3841,4585,4586,5197, 570,2504,3711,1490,5198,4587,2633, # 1760
+3293,1957,4588, 584,1514, 396,1045,1945,5199,4589,1968,2449,5200,5201,4590,4013, # 1776
+ 619,5202,3154,3294, 215,2007,2796,2561,3220,4591,3221,4592, 763,4263,3842,4593, # 1792
+5203,5204,1958,1767,2956,3365,3712,1174, 452,1477,4594,3366,3155,5205,2838,1253, # 1808
+2387,2189,1091,2290,4264, 492,5206, 638,1169,1825,2136,1752,4014, 648, 926,1021, # 1824
+1324,4595, 520,4596, 997, 847,1007, 892,4597,3843,2267,1872,3713,2405,1785,4598, # 1840
+1953,2957,3103,3222,1728,4265,2044,3714,4599,2008,1701,3156,1551,  30,2268,4266, # 1856
+5207,2027,4600,3589,5208, 501,5209,4267, 594,3478,2166,1822,3590,3479,3591,3223, # 1872
+ 829,2839,4268,5210,1680,3157,1225,4269,5211,3295,4601,4270,3158,2341,5212,4602, # 1888
+4271,5213,4015,4016,5214,1848,2388,2606,3367,5215,4603, 374,4017, 652,4272,4273, # 1904
+ 375,1140, 798,5216,5217,5218,2366,4604,2269, 546,1659, 138,3051,2450,4605,5219, # 1920
+2254, 612,1849, 910, 796,3844,1740,1371, 825,3845,3846,5220,2920,2562,5221, 692, # 1936
+ 444,3052,2634, 801,4606,4274,5222,1491, 244,1053,3053,4275,4276, 340,5223,4018, # 1952
+1041,3005, 293,1168,  87,1357,5224,1539, 959,5225,2240, 721, 694,4277,3847, 219, # 1968
+1478, 644,1417,3368,2666,1413,1401,1335,1389,4019,5226,5227,3006,2367,3159,1826, # 1984
+ 730,1515, 184,2840,  66,4607,5228,1660,2958, 246,3369, 378,1457, 226,3480, 975, # 2000
+4020,2959,1264,3592, 674, 696,5229, 163,5230,1141,2422,2167, 713,3593,3370,4608, # 2016
+4021,5231,5232,1186,  15,5233,1079,1070,5234,1522,3224,3594, 276,1050,2725, 758, # 2032
+1126, 653,2960,3296,5235,2342, 889,3595,4022,3104,3007, 903,1250,4609,4023,3481, # 2048
+3596,1342,1681,1718, 766,3297, 286,  89,2961,3715,5236,1713,5237,2607,3371,3008, # 2064
+5238,2962,2219,3225,2880,5239,4610,2505,2533, 181, 387,1075,4024, 731,2190,3372, # 2080
+5240,3298, 310, 313,3482,2304, 770,4278,  54,3054, 189,4611,3105,3848,4025,5241, # 2096
+1230,1617,1850, 355,3597,4279,4612,3373, 111,4280,3716,1350,3160,3483,3055,4281, # 2112
+2150,3299,3598,5242,2797,4026,4027,3009, 722,2009,5243,1071, 247,1207,2343,2478, # 2128
+1378,4613,2010, 864,1437,1214,4614, 373,3849,1142,2220, 667,4615, 442,2763,2563, # 2144
+3850,4028,1969,4282,3300,1840, 837, 170,1107, 934,1336,1883,5244,5245,2119,4283, # 2160
+2841, 743,1569,5246,4616,4284, 582,2389,1418,3484,5247,1803,5248, 357,1395,1729, # 2176
+3717,3301,2423,1564,2241,5249,3106,3851,1633,4617,1114,2086,4285,1532,5250, 482, # 2192
+2451,4618,5251,5252,1492, 833,1466,5253,2726,3599,1641,2842,5254,1526,1272,3718, # 2208
+4286,1686,1795, 416,2564,1903,1954,1804,5255,3852,2798,3853,1159,2321,5256,2881, # 2224
+4619,1610,1584,3056,2424,2764, 443,3302,1163,3161,5257,5258,4029,5259,4287,2506, # 2240
+3057,4620,4030,3162,2104,1647,3600,2011,1873,4288,5260,4289, 431,3485,5261, 250, # 2256
+  97,  81,4290,5262,1648,1851,1558, 160, 848,5263, 866, 740,1694,5264,2204,2843, # 2272
+3226,4291,4621,3719,1687, 950,2479, 426, 469,3227,3720,3721,4031,5265,5266,1188, # 2288
+ 424,1996, 861,3601,4292,3854,2205,2694, 168,1235,3602,4293,5267,2087,1674,4622, # 2304
+3374,3303, 220,2565,1009,5268,3855, 670,3010, 332,1208, 717,5269,5270,3603,2452, # 2320
+4032,3375,5271, 513,5272,1209,2882,3376,3163,4623,1080,5273,5274,5275,5276,2534, # 2336
+3722,3604, 815,1587,4033,4034,5277,3605,3486,3856,1254,4624,1328,3058,1390,4035, # 2352
+1741,4036,3857,4037,5278, 236,3858,2453,3304,5279,5280,3723,3859,1273,3860,4625, # 2368
+5281, 308,5282,4626, 245,4627,1852,2480,1307,2583, 430, 715,2137,2454,5283, 270, # 2384
+ 199,2883,4038,5284,3606,2727,1753, 761,1754, 725,1661,1841,4628,3487,3724,5285, # 2400
+5286, 587,  14,3305, 227,2608, 326, 480,2270, 943,2765,3607, 291, 650,1884,5287, # 2416
+1702,1226, 102,1547,  62,3488, 904,4629,3489,1164,4294,5288,5289,1224,1548,2766, # 2432
+ 391, 498,1493,5290,1386,1419,5291,2056,1177,4630, 813, 880,1081,2368, 566,1145, # 2448
+4631,2291,1001,1035,2566,2609,2242, 394,1286,5292,5293,2069,5294,  86,1494,1730, # 2464
+4039, 491,1588, 745, 897,2963, 843,3377,4040,2767,2884,3306,1768, 998,2221,2070, # 2480
+ 397,1827,1195,1970,3725,3011,3378, 284,5295,3861,2507,2138,2120,1904,5296,4041, # 2496
+2151,4042,4295,1036,3490,1905, 114,2567,4296, 209,1527,5297,5298,2964,2844,2635, # 2512
+2390,2728,3164, 812,2568,5299,3307,5300,1559, 737,1885,3726,1210, 885,  28,2695, # 2528
+3608,3862,5301,4297,1004,1780,4632,5302, 346,1982,2222,2696,4633,3863,1742, 797, # 2544
+1642,4043,1934,1072,1384,2152, 896,4044,3308,3727,3228,2885,3609,5303,2569,1959, # 2560
+4634,2455,1786,5304,5305,5306,4045,4298,1005,1308,3728,4299,2729,4635,4636,1528, # 2576
+2610, 161,1178,4300,1983, 987,4637,1101,4301, 631,4046,1157,3229,2425,1343,1241, # 2592
+1016,2243,2570, 372, 877,2344,2508,1160, 555,1935, 911,4047,5307, 466,1170, 169, # 2608
+1051,2921,2697,3729,2481,3012,1182,2012,2571,1251,2636,5308, 992,2345,3491,1540, # 2624
+2730,1201,2071,2406,1997,2482,5309,4638, 528,1923,2191,1503,1874,1570,2369,3379, # 2640
+3309,5310, 557,1073,5311,1828,3492,2088,2271,3165,3059,3107, 767,3108,2799,4639, # 2656
+1006,4302,4640,2346,1267,2179,3730,3230, 778,4048,3231,2731,1597,2667,5312,4641, # 2672
+5313,3493,5314,5315,5316,3310,2698,1433,3311, 131,  95,1504,4049, 723,4303,3166, # 2688
+1842,3610,2768,2192,4050,2028,2105,3731,5317,3013,4051,1218,5318,3380,3232,4052, # 2704
+4304,2584, 248,1634,3864, 912,5319,2845,3732,3060,3865, 654,  53,5320,3014,5321, # 2720
+1688,4642, 777,3494,1032,4053,1425,5322, 191, 820,2121,2846, 971,4643, 931,3233, # 2736
+ 135, 664, 783,3866,1998, 772,2922,1936,4054,3867,4644,2923,3234, 282,2732, 640, # 2752
+1372,3495,1127, 922, 325,3381,5323,5324, 711,2045,5325,5326,4055,2223,2800,1937, # 2768
+4056,3382,2224,2255,3868,2305,5327,4645,3869,1258,3312,4057,3235,2139,2965,4058, # 2784
+4059,5328,2225, 258,3236,4646, 101,1227,5329,3313,1755,5330,1391,3314,5331,2924, # 2800
+2057, 893,5332,5333,5334,1402,4305,2347,5335,5336,3237,3611,5337,5338, 878,1325, # 2816
+1781,2801,4647, 259,1385,2585, 744,1183,2272,4648,5339,4060,2509,5340, 684,1024, # 2832
+4306,5341, 472,3612,3496,1165,3315,4061,4062, 322,2153, 881, 455,1695,1152,1340, # 2848
+ 660, 554,2154,4649,1058,4650,4307, 830,1065,3383,4063,4651,1924,5342,1703,1919, # 2864
+5343, 932,2273, 122,5344,4652, 947, 677,5345,3870,2637, 297,1906,1925,2274,4653, # 2880
+2322,3316,5346,5347,4308,5348,4309,  84,4310, 112, 989,5349, 547,1059,4064, 701, # 2896
+3613,1019,5350,4311,5351,3497, 942, 639, 457,2306,2456, 993,2966, 407, 851, 494, # 2912
+4654,3384, 927,5352,1237,5353,2426,3385, 573,4312, 680, 921,2925,1279,1875, 285, # 2928
+ 790,1448,1984, 719,2168,5354,5355,4655,4065,4066,1649,5356,1541, 563,5357,1077, # 2944
+5358,3386,3061,3498, 511,3015,4067,4068,3733,4069,1268,2572,3387,3238,4656,4657, # 2960
+5359, 535,1048,1276,1189,2926,2029,3167,1438,1373,2847,2967,1134,2013,5360,4313, # 2976
+1238,2586,3109,1259,5361, 700,5362,2968,3168,3734,4314,5363,4315,1146,1876,1907, # 2992
+4658,2611,4070, 781,2427, 132,1589, 203, 147, 273,2802,2407, 898,1787,2155,4071, # 3008
+4072,5364,3871,2803,5365,5366,4659,4660,5367,3239,5368,1635,3872, 965,5369,1805, # 3024
+2699,1516,3614,1121,1082,1329,3317,4073,1449,3873,  65,1128,2848,2927,2769,1590, # 3040
+3874,5370,5371,  12,2668,  45, 976,2587,3169,4661, 517,2535,1013,1037,3240,5372, # 3056
+3875,2849,5373,3876,5374,3499,5375,2612, 614,1999,2323,3877,3110,2733,2638,5376, # 3072
+2588,4316, 599,1269,5377,1811,3735,5378,2700,3111, 759,1060, 489,1806,3388,3318, # 3088
+1358,5379,5380,2391,1387,1215,2639,2256, 490,5381,5382,4317,1759,2392,2348,5383, # 3104
+4662,3878,1908,4074,2640,1807,3241,4663,3500,3319,2770,2349, 874,5384,5385,3501, # 3120
+3736,1859,  91,2928,3737,3062,3879,4664,5386,3170,4075,2669,5387,3502,1202,1403, # 3136
+3880,2969,2536,1517,2510,4665,3503,2511,5388,4666,5389,2701,1886,1495,1731,4076, # 3152
+2370,4667,5390,2030,5391,5392,4077,2702,1216, 237,2589,4318,2324,4078,3881,4668, # 3168
+4669,2703,3615,3504, 445,4670,5393,5394,5395,5396,2771,  61,4079,3738,1823,4080, # 3184
+5397, 687,2046, 935, 925, 405,2670, 703,1096,1860,2734,4671,4081,1877,1367,2704, # 3200
+3389, 918,2106,1782,2483, 334,3320,1611,1093,4672, 564,3171,3505,3739,3390, 945, # 3216
+2641,2058,4673,5398,1926, 872,4319,5399,3506,2705,3112, 349,4320,3740,4082,4674, # 3232
+3882,4321,3741,2156,4083,4675,4676,4322,4677,2408,2047, 782,4084, 400, 251,4323, # 3248
+1624,5400,5401, 277,3742, 299,1265, 476,1191,3883,2122,4324,4325,1109, 205,5402, # 3264
+2590,1000,2157,3616,1861,5403,5404,5405,4678,5406,4679,2573, 107,2484,2158,4085, # 3280
+3507,3172,5407,1533, 541,1301, 158, 753,4326,2886,3617,5408,1696, 370,1088,4327, # 3296
+4680,3618, 579, 327, 440, 162,2244, 269,1938,1374,3508, 968,3063,  56,1396,3113, # 3312
+2107,3321,3391,5409,1927,2159,4681,3016,5410,3619,5411,5412,3743,4682,2485,5413, # 3328
+2804,5414,1650,4683,5415,2613,5416,5417,4086,2671,3392,1149,3393,4087,3884,4088, # 3344
+5418,1076,  49,5419, 951,3242,3322,3323, 450,2850, 920,5420,1812,2805,2371,4328, # 3360
+1909,1138,2372,3885,3509,5421,3243,4684,1910,1147,1518,2428,4685,3886,5422,4686, # 3376
+2393,2614, 260,1796,3244,5423,5424,3887,3324, 708,5425,3620,1704,5426,3621,1351, # 3392
+1618,3394,3017,1887, 944,4329,3395,4330,3064,3396,4331,5427,3744, 422, 413,1714, # 3408
+3325, 500,2059,2350,4332,2486,5428,1344,1911, 954,5429,1668,5430,5431,4089,2409, # 3424
+4333,3622,3888,4334,5432,2307,1318,2512,3114, 133,3115,2887,4687, 629,  31,2851, # 3440
+2706,3889,4688, 850, 949,4689,4090,2970,1732,2089,4335,1496,1853,5433,4091, 620, # 3456
+3245, 981,1242,3745,3397,1619,3746,1643,3326,2140,2457,1971,1719,3510,2169,5434, # 3472
+3246,5435,5436,3398,1829,5437,1277,4690,1565,2048,5438,1636,3623,3116,5439, 869, # 3488
+2852, 655,3890,3891,3117,4092,3018,3892,1310,3624,4691,5440,5441,5442,1733, 558, # 3504
+4692,3747, 335,1549,3065,1756,4336,3748,1946,3511,1830,1291,1192, 470,2735,2108, # 3520
+2806, 913,1054,4093,5443,1027,5444,3066,4094,4693, 982,2672,3399,3173,3512,3247, # 3536
+3248,1947,2807,5445, 571,4694,5446,1831,5447,3625,2591,1523,2429,5448,2090, 984, # 3552
+4695,3749,1960,5449,3750, 852, 923,2808,3513,3751, 969,1519, 999,2049,2325,1705, # 3568
+5450,3118, 615,1662, 151, 597,4095,2410,2326,1049, 275,4696,3752,4337, 568,3753, # 3584
+3626,2487,4338,3754,5451,2430,2275, 409,3249,5452,1566,2888,3514,1002, 769,2853, # 3600
+ 194,2091,3174,3755,2226,3327,4339, 628,1505,5453,5454,1763,2180,3019,4096, 521, # 3616
+1161,2592,1788,2206,2411,4697,4097,1625,4340,4341, 412,  42,3119, 464,5455,2642, # 3632
+4698,3400,1760,1571,2889,3515,2537,1219,2207,3893,2643,2141,2373,4699,4700,3328, # 3648
+1651,3401,3627,5456,5457,3628,2488,3516,5458,3756,5459,5460,2276,2092, 460,5461, # 3664
+4701,5462,3020, 962, 588,3629, 289,3250,2644,1116,  52,5463,3067,1797,5464,5465, # 3680
+5466,1467,5467,1598,1143,3757,4342,1985,1734,1067,4702,1280,3402, 465,4703,1572, # 3696
+ 510,5468,1928,2245,1813,1644,3630,5469,4704,3758,5470,5471,2673,1573,1534,5472, # 3712
+5473, 536,1808,1761,3517,3894,3175,2645,5474,5475,5476,4705,3518,2929,1912,2809, # 3728
+5477,3329,1122, 377,3251,5478, 360,5479,5480,4343,1529, 551,5481,2060,3759,1769, # 3744
+2431,5482,2930,4344,3330,3120,2327,2109,2031,4706,1404, 136,1468,1479, 672,1171, # 3760
+3252,2308, 271,3176,5483,2772,5484,2050, 678,2736, 865,1948,4707,5485,2014,4098, # 3776
+2971,5486,2737,2227,1397,3068,3760,4708,4709,1735,2931,3403,3631,5487,3895, 509, # 3792
+2854,2458,2890,3896,5488,5489,3177,3178,4710,4345,2538,4711,2309,1166,1010, 552, # 3808
+ 681,1888,5490,5491,2972,2973,4099,1287,1596,1862,3179, 358, 453, 736, 175, 478, # 3824
+1117, 905,1167,1097,5492,1854,1530,5493,1706,5494,2181,3519,2292,3761,3520,3632, # 3840
+4346,2093,4347,5495,3404,1193,2489,4348,1458,2193,2208,1863,1889,1421,3331,2932, # 3856
+3069,2182,3521, 595,2123,5496,4100,5497,5498,4349,1707,2646, 223,3762,1359, 751, # 3872
+3121, 183,3522,5499,2810,3021, 419,2374, 633, 704,3897,2394, 241,5500,5501,5502, # 3888
+ 838,3022,3763,2277,2773,2459,3898,1939,2051,4101,1309,3122,2246,1181,5503,1136, # 3904
+2209,3899,2375,1446,4350,2310,4712,5504,5505,4351,1055,2615, 484,3764,5506,4102, # 3920
+ 625,4352,2278,3405,1499,4353,4103,5507,4104,4354,3253,2279,2280,3523,5508,5509, # 3936
+2774, 808,2616,3765,3406,4105,4355,3123,2539, 526,3407,3900,4356, 955,5510,1620, # 3952
+4357,2647,2432,5511,1429,3766,1669,1832, 994, 928,5512,3633,1260,5513,5514,5515, # 3968
+1949,2293, 741,2933,1626,4358,2738,2460, 867,1184, 362,3408,1392,5516,5517,4106, # 3984
+4359,1770,1736,3254,2934,4713,4714,1929,2707,1459,1158,5518,3070,3409,2891,1292, # 4000
+1930,2513,2855,3767,1986,1187,2072,2015,2617,4360,5519,2574,2514,2170,3768,2490, # 4016
+3332,5520,3769,4715,5521,5522, 666,1003,3023,1022,3634,4361,5523,4716,1814,2257, # 4032
+ 574,3901,1603, 295,1535, 705,3902,4362, 283, 858, 417,5524,5525,3255,4717,4718, # 4048
+3071,1220,1890,1046,2281,2461,4107,1393,1599, 689,2575, 388,4363,5526,2491, 802, # 4064
+5527,2811,3903,2061,1405,2258,5528,4719,3904,2110,1052,1345,3256,1585,5529, 809, # 4080
+5530,5531,5532, 575,2739,3524, 956,1552,1469,1144,2328,5533,2329,1560,2462,3635, # 4096
+3257,4108, 616,2210,4364,3180,2183,2294,5534,1833,5535,3525,4720,5536,1319,3770, # 4112
+3771,1211,3636,1023,3258,1293,2812,5537,5538,5539,3905, 607,2311,3906, 762,2892, # 4128
+1439,4365,1360,4721,1485,3072,5540,4722,1038,4366,1450,2062,2648,4367,1379,4723, # 4144
+2593,5541,5542,4368,1352,1414,2330,2935,1172,5543,5544,3907,3908,4724,1798,1451, # 4160
+5545,5546,5547,5548,2936,4109,4110,2492,2351, 411,4111,4112,3637,3333,3124,4725, # 4176
+1561,2674,1452,4113,1375,5549,5550,  47,2974, 316,5551,1406,1591,2937,3181,5552, # 4192
+1025,2142,3125,3182, 354,2740, 884,2228,4369,2412, 508,3772, 726,3638, 996,2433, # 4208
+3639, 729,5553, 392,2194,1453,4114,4726,3773,5554,5555,2463,3640,2618,1675,2813, # 4224
+ 919,2352,2975,2353,1270,4727,4115,  73,5556,5557, 647,5558,3259,2856,2259,1550, # 4240
+1346,3024,5559,1332, 883,3526,5560,5561,5562,5563,3334,2775,5564,1212, 831,1347, # 4256
+4370,4728,2331,3909,1864,3073, 720,3910,4729,4730,3911,5565,4371,5566,5567,4731, # 4272
+5568,5569,1799,4732,3774,2619,4733,3641,1645,2376,4734,5570,2938, 669,2211,2675, # 4288
+2434,5571,2893,5572,5573,1028,3260,5574,4372,2413,5575,2260,1353,5576,5577,4735, # 4304
+3183, 518,5578,4116,5579,4373,1961,5580,2143,4374,5581,5582,3025,2354,2355,3912, # 4320
+ 516,1834,1454,4117,2708,4375,4736,2229,2620,1972,1129,3642,5583,2776,5584,2976, # 4336
+1422, 577,1470,3026,1524,3410,5585,5586, 432,4376,3074,3527,5587,2594,1455,2515, # 4352
+2230,1973,1175,5588,1020,2741,4118,3528,4737,5589,2742,5590,1743,1361,3075,3529, # 4368
+2649,4119,4377,4738,2295, 895, 924,4378,2171, 331,2247,3076, 166,1627,3077,1098, # 4384
+5591,1232,2894,2231,3411,4739, 657, 403,1196,2377, 542,3775,3412,1600,4379,3530, # 4400
+5592,4740,2777,3261, 576, 530,1362,4741,4742,2540,2676,3776,4120,5593, 842,3913, # 4416
+5594,2814,2032,1014,4121, 213,2709,3413, 665, 621,4380,5595,3777,2939,2435,5596, # 4432
+2436,3335,3643,3414,4743,4381,2541,4382,4744,3644,1682,4383,3531,1380,5597, 724, # 4448
+2282, 600,1670,5598,1337,1233,4745,3126,2248,5599,1621,4746,5600, 651,4384,5601, # 4464
+1612,4385,2621,5602,2857,5603,2743,2312,3078,5604, 716,2464,3079, 174,1255,2710, # 4480
+4122,3645, 548,1320,1398, 728,4123,1574,5605,1891,1197,3080,4124,5606,3081,3082, # 4496
+3778,3646,3779, 747,5607, 635,4386,4747,5608,5609,5610,4387,5611,5612,4748,5613, # 4512
+3415,4749,2437, 451,5614,3780,2542,2073,4388,2744,4389,4125,5615,1764,4750,5616, # 4528
+4390, 350,4751,2283,2395,2493,5617,4391,4126,2249,1434,4127, 488,4752, 458,4392, # 4544
+4128,3781, 771,1330,2396,3914,2576,3184,2160,2414,1553,2677,3185,4393,5618,2494, # 4560
+2895,2622,1720,2711,4394,3416,4753,5619,2543,4395,5620,3262,4396,2778,5621,2016, # 4576
+2745,5622,1155,1017,3782,3915,5623,3336,2313, 201,1865,4397,1430,5624,4129,5625, # 4592
+5626,5627,5628,5629,4398,1604,5630, 414,1866, 371,2595,4754,4755,3532,2017,3127, # 4608
+4756,1708, 960,4399, 887, 389,2172,1536,1663,1721,5631,2232,4130,2356,2940,1580, # 4624
+5632,5633,1744,4757,2544,4758,4759,5634,4760,5635,2074,5636,4761,3647,3417,2896, # 4640
+4400,5637,4401,2650,3418,2815, 673,2712,2465, 709,3533,4131,3648,4402,5638,1148, # 4656
+ 502, 634,5639,5640,1204,4762,3649,1575,4763,2623,3783,5641,3784,3128, 948,3263, # 4672
+ 121,1745,3916,1110,5642,4403,3083,2516,3027,4132,3785,1151,1771,3917,1488,4133, # 4688
+1987,5643,2438,3534,5644,5645,2094,5646,4404,3918,1213,1407,2816, 531,2746,2545, # 4704
+3264,1011,1537,4764,2779,4405,3129,1061,5647,3786,3787,1867,2897,5648,2018, 120, # 4720
+4406,4407,2063,3650,3265,2314,3919,2678,3419,1955,4765,4134,5649,3535,1047,2713, # 4736
+1266,5650,1368,4766,2858, 649,3420,3920,2546,2747,1102,2859,2679,5651,5652,2000, # 4752
+5653,1111,3651,2977,5654,2495,3921,3652,2817,1855,3421,3788,5655,5656,3422,2415, # 4768
+2898,3337,3266,3653,5657,2577,5658,3654,2818,4135,1460, 856,5659,3655,5660,2899, # 4784
+2978,5661,2900,3922,5662,4408, 632,2517, 875,3923,1697,3924,2296,5663,5664,4767, # 4800
+3028,1239, 580,4768,4409,5665, 914, 936,2075,1190,4136,1039,2124,5666,5667,5668, # 4816
+5669,3423,1473,5670,1354,4410,3925,4769,2173,3084,4137, 915,3338,4411,4412,3339, # 4832
+1605,1835,5671,2748, 398,3656,4413,3926,4138, 328,1913,2860,4139,3927,1331,4414, # 4848
+3029, 937,4415,5672,3657,4140,4141,3424,2161,4770,3425, 524, 742, 538,3085,1012, # 4864
+5673,5674,3928,2466,5675, 658,1103, 225,3929,5676,5677,4771,5678,4772,5679,3267, # 4880
+1243,5680,4142, 963,2250,4773,5681,2714,3658,3186,5682,5683,2596,2332,5684,4774, # 4896
+5685,5686,5687,3536, 957,3426,2547,2033,1931,2941,2467, 870,2019,3659,1746,2780, # 4912
+2781,2439,2468,5688,3930,5689,3789,3130,3790,3537,3427,3791,5690,1179,3086,5691, # 4928
+3187,2378,4416,3792,2548,3188,3131,2749,4143,5692,3428,1556,2549,2297, 977,2901, # 4944
+2034,4144,1205,3429,5693,1765,3430,3189,2125,1271, 714,1689,4775,3538,5694,2333, # 4960
+3931, 533,4417,3660,2184, 617,5695,2469,3340,3539,2315,5696,5697,3190,5698,5699, # 4976
+3932,1988, 618, 427,2651,3540,3431,5700,5701,1244,1690,5702,2819,4418,4776,5703, # 4992
+3541,4777,5704,2284,1576, 473,3661,4419,3432, 972,5705,3662,5706,3087,5707,5708, # 5008
+4778,4779,5709,3793,4145,4146,5710, 153,4780, 356,5711,1892,2902,4420,2144, 408, # 5024
+ 803,2357,5712,3933,5713,4421,1646,2578,2518,4781,4782,3934,5714,3935,4422,5715, # 5040
+2416,3433, 752,5716,5717,1962,3341,2979,5718, 746,3030,2470,4783,4423,3794, 698, # 5056
+4784,1893,4424,3663,2550,4785,3664,3936,5719,3191,3434,5720,1824,1302,4147,2715, # 5072
+3937,1974,4425,5721,4426,3192, 823,1303,1288,1236,2861,3542,4148,3435, 774,3938, # 5088
+5722,1581,4786,1304,2862,3939,4787,5723,2440,2162,1083,3268,4427,4149,4428, 344, # 5104
+1173, 288,2316, 454,1683,5724,5725,1461,4788,4150,2597,5726,5727,4789, 985, 894, # 5120
+5728,3436,3193,5729,1914,2942,3795,1989,5730,2111,1975,5731,4151,5732,2579,1194, # 5136
+ 425,5733,4790,3194,1245,3796,4429,5734,5735,2863,5736, 636,4791,1856,3940, 760, # 5152
+1800,5737,4430,2212,1508,4792,4152,1894,1684,2298,5738,5739,4793,4431,4432,2213, # 5168
+ 479,5740,5741, 832,5742,4153,2496,5743,2980,2497,3797, 990,3132, 627,1815,2652, # 5184
+4433,1582,4434,2126,2112,3543,4794,5744, 799,4435,3195,5745,4795,2113,1737,3031, # 5200
+1018, 543, 754,4436,3342,1676,4796,4797,4154,4798,1489,5746,3544,5747,2624,2903, # 5216
+4155,5748,5749,2981,5750,5751,5752,5753,3196,4799,4800,2185,1722,5754,3269,3270, # 5232
+1843,3665,1715, 481, 365,1976,1857,5755,5756,1963,2498,4801,5757,2127,3666,3271, # 5248
+ 433,1895,2064,2076,5758, 602,2750,5759,5760,5761,5762,5763,3032,1628,3437,5764, # 5264
+3197,4802,4156,2904,4803,2519,5765,2551,2782,5766,5767,5768,3343,4804,2905,5769, # 5280
+4805,5770,2864,4806,4807,1221,2982,4157,2520,5771,5772,5773,1868,1990,5774,5775, # 5296
+5776,1896,5777,5778,4808,1897,4158, 318,5779,2095,4159,4437,5780,5781, 485,5782, # 5312
+ 938,3941, 553,2680, 116,5783,3942,3667,5784,3545,2681,2783,3438,3344,2820,5785, # 5328
+3668,2943,4160,1747,2944,2983,5786,5787, 207,5788,4809,5789,4810,2521,5790,3033, # 5344
+ 890,3669,3943,5791,1878,3798,3439,5792,2186,2358,3440,1652,5793,5794,5795, 941, # 5360
+2299, 208,3546,4161,2020, 330,4438,3944,2906,2499,3799,4439,4811,5796,5797,5798, # 5376
+)
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5prober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5prober.py
new file mode 100644
index 00000000..98f99701
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/big5prober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import Big5DistributionAnalysis
+from .mbcssm import BIG5_SM_MODEL
+
+
+class Big5Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(Big5Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(BIG5_SM_MODEL)
+        self.distribution_analyzer = Big5DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "Big5"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/chardistribution.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/chardistribution.py
new file mode 100644
index 00000000..c0395f4a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/chardistribution.py
@@ -0,0 +1,233 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .euctwfreq import (EUCTW_CHAR_TO_FREQ_ORDER, EUCTW_TABLE_SIZE,
+                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
+from .euckrfreq import (EUCKR_CHAR_TO_FREQ_ORDER, EUCKR_TABLE_SIZE,
+                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
+from .gb2312freq import (GB2312_CHAR_TO_FREQ_ORDER, GB2312_TABLE_SIZE,
+                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
+from .big5freq import (BIG5_CHAR_TO_FREQ_ORDER, BIG5_TABLE_SIZE,
+                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
+from .jisfreq import (JIS_CHAR_TO_FREQ_ORDER, JIS_TABLE_SIZE,
+                      JIS_TYPICAL_DISTRIBUTION_RATIO)
+
+
+class CharDistributionAnalysis(object):
+    ENOUGH_DATA_THRESHOLD = 1024
+    SURE_YES = 0.99
+    SURE_NO = 0.01
+    MINIMUM_DATA_THRESHOLD = 3
+
+    def __init__(self):
+        # Mapping table to get frequency order from char order (get from
+        # GetOrder())
+        self._char_to_freq_order = None
+        self._table_size = None  # Size of above table
+        # This is a constant value which varies from language to language,
+        # used in calculating confidence.  See
+        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
+        # for further detail.
+        self.typical_distribution_ratio = None
+        self._done = None
+        self._total_chars = None
+        self._freq_chars = None
+        self.reset()
+
+    def reset(self):
+        """reset analyser, clear any state"""
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+        self._total_chars = 0  # Total characters encountered
+        # The number of characters whose frequency order is less than 512
+        self._freq_chars = 0
+
+    def feed(self, char, char_len):
+        """feed a character with known length"""
+        if char_len == 2:
+            # we only care about 2-bytes character in our distribution analysis
+            order = self.get_order(char)
+        else:
+            order = -1
+        if order >= 0:
+            self._total_chars += 1
+            # order is valid
+            if order < self._table_size:
+                if 512 > self._char_to_freq_order[order]:
+                    self._freq_chars += 1
+
+    def get_confidence(self):
+        """return confidence based on existing data"""
+        # if we didn't receive any character in our consideration range,
+        # return negative answer
+        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
+            return self.SURE_NO
+
+        if self._total_chars != self._freq_chars:
+            r = (self._freq_chars / ((self._total_chars - self._freq_chars)
+                 * self.typical_distribution_ratio))
+            if r < self.SURE_YES:
+                return r
+
+        # normalize confidence (we don't want to be 100% sure)
+        return self.SURE_YES
+
+    def got_enough_data(self):
+        # It is not necessary to receive all data to draw conclusion.
+        # For charset detection, certain amount of data is enough
+        return self._total_chars > self.ENOUGH_DATA_THRESHOLD
+
+    def get_order(self, byte_str):
+        # We do not handle characters based on the original encoding string,
+        # but convert this encoding string to a number, here called order.
+        # This allows multiple encodings of a language to share one frequency
+        # table.
+        return -1
+
+
+class EUCTWDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCTWDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCTW_TABLE_SIZE
+        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-TW encoding, we are interested
+        #   first  byte range: 0xc4 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xC4:
+            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
+        else:
+            return -1
+
+
+class EUCKRDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCKRDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCKR_TABLE_SIZE
+        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-KR encoding, we are interested
+        #   first  byte range: 0xb0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xB0:
+            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
+        else:
+            return -1
+
+
+class GB2312DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(GB2312DistributionAnalysis, self).__init__()
+        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
+        self._table_size = GB2312_TABLE_SIZE
+        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for GB2312 encoding, we are interested
+        #  first  byte range: 0xb0 -- 0xfe
+        #  second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if (first_char >= 0xB0) and (second_char >= 0xA1):
+            return 94 * (first_char - 0xB0) + second_char - 0xA1
+        else:
+            return -1
+
+
+class Big5DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(Big5DistributionAnalysis, self).__init__()
+        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
+        self._table_size = BIG5_TABLE_SIZE
+        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for big5 encoding, we are interested
+        #   first  byte range: 0xa4 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if first_char >= 0xA4:
+            if second_char >= 0xA1:
+                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
+            else:
+                return 157 * (first_char - 0xA4) + second_char - 0x40
+        else:
+            return -1
+
+
+class SJISDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(SJISDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for sjis encoding, we are interested
+        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if (first_char >= 0x81) and (first_char <= 0x9F):
+            order = 188 * (first_char - 0x81)
+        elif (first_char >= 0xE0) and (first_char <= 0xEF):
+            order = 188 * (first_char - 0xE0 + 31)
+        else:
+            return -1
+        order = order + second_char - 0x40
+        if second_char > 0x7F:
+            order = -1
+        return order
+
+
+class EUCJPDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCJPDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-JP encoding, we are interested
+        #   first  byte range: 0xa0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        char = byte_str[0]
+        if char >= 0xA0:
+            return 94 * (char - 0xA1) + byte_str[1] - 0xa1
+        else:
+            return -1
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetgroupprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetgroupprober.py
new file mode 100644
index 00000000..8b3738ef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetgroupprober.py
@@ -0,0 +1,106 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import ProbingState
+from .charsetprober import CharSetProber
+
+
+class CharSetGroupProber(CharSetProber):
+    def __init__(self, lang_filter=None):
+        super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
+        self._active_num = 0
+        self.probers = []
+        self._best_guess_prober = None
+
+    def reset(self):
+        super(CharSetGroupProber, self).reset()
+        self._active_num = 0
+        for prober in self.probers:
+            if prober:
+                prober.reset()
+                prober.active = True
+                self._active_num += 1
+        self._best_guess_prober = None
+
+    @property
+    def charset_name(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.charset_name
+
+    @property
+    def language(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.language
+
+    def feed(self, byte_str):
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                continue
+            state = prober.feed(byte_str)
+            if not state:
+                continue
+            if state == ProbingState.FOUND_IT:
+                self._best_guess_prober = prober
+                return self.state
+            elif state == ProbingState.NOT_ME:
+                prober.active = False
+                self._active_num -= 1
+                if self._active_num <= 0:
+                    self._state = ProbingState.NOT_ME
+                    return self.state
+        return self.state
+
+    def get_confidence(self):
+        state = self.state
+        if state == ProbingState.FOUND_IT:
+            return 0.99
+        elif state == ProbingState.NOT_ME:
+            return 0.01
+        best_conf = 0.0
+        self._best_guess_prober = None
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                self.logger.debug('%s not active', prober.charset_name)
+                continue
+            conf = prober.get_confidence()
+            self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
+            if best_conf < conf:
+                best_conf = conf
+                self._best_guess_prober = prober
+        if not self._best_guess_prober:
+            return 0.0
+        return best_conf
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetprober.py
new file mode 100644
index 00000000..eac4e598
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/charsetprober.py
@@ -0,0 +1,145 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+import re
+
+from .enums import ProbingState
+
+
+class CharSetProber(object):
+
+    SHORTCUT_THRESHOLD = 0.95
+
+    def __init__(self, lang_filter=None):
+        self._state = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+
+    def reset(self):
+        self._state = ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        return None
+
+    def feed(self, buf):
+        pass
+
+    @property
+    def state(self):
+        return self._state
+
+    def get_confidence(self):
+        return 0.0
+
+    @staticmethod
+    def filter_high_byte_only(buf):
+        buf = re.sub(b'([\x00-\x7F])+', b' ', buf)
+        return buf
+
+    @staticmethod
+    def filter_international_words(buf):
+        """
+        We define three types of bytes:
+        alphabet: english alphabets [a-zA-Z]
+        international: international characters [\x80-\xFF]
+        marker: everything else [^a-zA-Z\x80-\xFF]
+
+        The input buffer can be thought to contain a series of words delimited
+        by markers. This function works to filter all words that contain at
+        least one international character. All contiguous sequences of markers
+        are replaced by a single space ascii character.
+
+        This filter applies to all scripts which do not use English characters.
+        """
+        filtered = bytearray()
+
+        # This regex expression filters out only words that have at-least one
+        # international character. The word may include one marker character at
+        # the end.
+        words = re.findall(b'[a-zA-Z]*[\x80-\xFF]+[a-zA-Z]*[^a-zA-Z\x80-\xFF]?',
+                           buf)
+
+        for word in words:
+            filtered.extend(word[:-1])
+
+            # If the last character in the word is a marker, replace it with a
+            # space as markers shouldn't affect our analysis (they are used
+            # similarly across all languages and may thus have similar
+            # frequencies).
+            last_char = word[-1:]
+            if not last_char.isalpha() and last_char < b'\x80':
+                last_char = b' '
+            filtered.extend(last_char)
+
+        return filtered
+
+    @staticmethod
+    def filter_with_english_letters(buf):
+        """
+        Returns a copy of ``buf`` that retains only the sequences of English
+        alphabet and high byte characters that are not between <> characters.
+        Also retains English alphabet and high byte characters immediately
+        before occurrences of >.
+
+        This filter can be applied to all scripts which contain both English
+        characters and extended ASCII characters, but is currently only used by
+        ``Latin1Prober``.
+        """
+        filtered = bytearray()
+        in_tag = False
+        prev = 0
+
+        for curr in range(len(buf)):
+            # Slice here to get bytes instead of an int with Python 3
+            buf_char = buf[curr:curr + 1]
+            # Check if we're coming out of or entering an HTML tag
+            if buf_char == b'>':
+                in_tag = False
+            elif buf_char == b'<':
+                in_tag = True
+
+            # If current character is not extended-ASCII and not alphabetic...
+            if buf_char < b'\x80' and not buf_char.isalpha():
+                # ...and we're not in a tag
+                if curr > prev and not in_tag:
+                    # Keep everything after last non-extended-ASCII,
+                    # non-alphabetic character
+                    filtered.extend(buf[prev:curr])
+                    # Output a space to delimit stretch we kept
+                    filtered.extend(b' ')
+                prev = curr + 1
+
+        # If we're not in a tag...
+        if not in_tag:
+            # Keep everything after last non-extended-ASCII, non-alphabetic
+            # character
+            filtered.extend(buf[prev:])
+
+        return filtered
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__init__.py
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__init__.py
@@ -0,0 +1 @@
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..f221f0d7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-37.pyc
new file mode 100644
index 00000000..a13c108a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/chardetect.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/chardetect.py
new file mode 100644
index 00000000..c61136b6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cli/chardetect.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+"""
+Script which takes one or more file paths and reports on their detected
+encodings
+
+Example::
+
+    % chardetect somefile someotherfile
+    somefile: windows-1252 with confidence 0.5
+    someotherfile: ascii with confidence 1.0
+
+If no paths are provided, it takes its input from stdin.
+
+"""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import argparse
+import sys
+
+from pip._vendor.chardet import __version__
+from pip._vendor.chardet.compat import PY2
+from pip._vendor.chardet.universaldetector import UniversalDetector
+
+
+def description_of(lines, name='stdin'):
+    """
+    Return a string describing the probable encoding of a file or
+    list of strings.
+
+    :param lines: The lines to get the encoding of.
+    :type lines: Iterable of bytes
+    :param name: Name of file or collection of lines
+    :type name: str
+    """
+    u = UniversalDetector()
+    for line in lines:
+        line = bytearray(line)
+        u.feed(line)
+        # shortcut out of the loop to save reading further - particularly useful if we read a BOM.
+        if u.done:
+            break
+    u.close()
+    result = u.result
+    if PY2:
+        name = name.decode(sys.getfilesystemencoding(), 'ignore')
+    if result['encoding']:
+        return '{0}: {1} with confidence {2}'.format(name, result['encoding'],
+                                                     result['confidence'])
+    else:
+        return '{0}: no result'.format(name)
+
+
+def main(argv=None):
+    """
+    Handles command line arguments and gets things started.
+
+    :param argv: List of arguments, as if specified on the command-line.
+                 If None, ``sys.argv[1:]`` is used instead.
+    :type argv: list of str
+    """
+    # Get command line arguments
+    parser = argparse.ArgumentParser(
+        description="Takes one or more file paths and reports their detected \
+                     encodings")
+    parser.add_argument('input',
+                        help='File whose encoding we would like to determine. \
+                              (default: stdin)',
+                        type=argparse.FileType('rb'), nargs='*',
+                        default=[sys.stdin if PY2 else sys.stdin.buffer])
+    parser.add_argument('--version', action='version',
+                        version='%(prog)s {0}'.format(__version__))
+    args = parser.parse_args(argv)
+
+    for f in args.input:
+        if f.isatty():
+            print("You are running chardetect interactively. Press " +
+                  "CTRL-D twice at the start of a blank line to signal the " +
+                  "end of your input. If you want help, run chardetect " +
+                  "--help\n", file=sys.stderr)
+        print(description_of(f, f.name))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/codingstatemachine.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/codingstatemachine.py
new file mode 100644
index 00000000..68fba44f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/codingstatemachine.py
@@ -0,0 +1,88 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+
+from .enums import MachineState
+
+
+class CodingStateMachine(object):
+    """
+    A state machine to verify a byte sequence for a particular encoding. For
+    each byte the detector receives, it will feed that byte to every active
+    state machine available, one byte at a time. The state machine changes its
+    state based on its previous state and the byte it receives. There are 3
+    states in a state machine that are of interest to an auto-detector:
+
+    START state: This is the state to start with, or a legal byte sequence
+                 (i.e. a valid code point) for character has been identified.
+
+    ME state:  This indicates that the state machine identified a byte sequence
+               that is specific to the charset it is designed for and that
+               there is no other possible encoding which can contain this byte
+               sequence. This will to lead to an immediate positive answer for
+               the detector.
+
+    ERROR state: This indicates the state machine identified an illegal byte
+                 sequence for that encoding. This will lead to an immediate
+                 negative answer for this encoding. Detector will exclude this
+                 encoding from consideration from here on.
+    """
+    def __init__(self, sm):
+        self._model = sm
+        self._curr_byte_pos = 0
+        self._curr_char_len = 0
+        self._curr_state = None
+        self.logger = logging.getLogger(__name__)
+        self.reset()
+
+    def reset(self):
+        self._curr_state = MachineState.START
+
+    def next_state(self, c):
+        # for each byte we get its class
+        # if it is first byte, we also get byte length
+        byte_class = self._model['class_table'][c]
+        if self._curr_state == MachineState.START:
+            self._curr_byte_pos = 0
+            self._curr_char_len = self._model['char_len_table'][byte_class]
+        # from byte's class and state_table, we get its next state
+        curr_state = (self._curr_state * self._model['class_factor']
+                      + byte_class)
+        self._curr_state = self._model['state_table'][curr_state]
+        self._curr_byte_pos += 1
+        return self._curr_state
+
+    def get_current_charlen(self):
+        return self._curr_char_len
+
+    def get_coding_state_machine(self):
+        return self._model['name']
+
+    @property
+    def language(self):
+        return self._model['language']
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/compat.py
new file mode 100644
index 00000000..ddd74687
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/compat.py
@@ -0,0 +1,34 @@
+######################## BEGIN LICENSE BLOCK ########################
+# Contributor(s):
+#   Dan Blanchard
+#   Ian Cordasco
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import sys
+
+
+if sys.version_info < (3, 0):
+    PY2 = True
+    PY3 = False
+    base_str = (str, unicode)
+    text_type = unicode
+else:
+    PY2 = False
+    PY3 = True
+    base_str = (bytes, str)
+    text_type = str
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cp949prober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cp949prober.py
new file mode 100644
index 00000000..efd793ab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/cp949prober.py
@@ -0,0 +1,49 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCKRDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import CP949_SM_MODEL
+
+
+class CP949Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(CP949Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(CP949_SM_MODEL)
+        # NOTE: CP949 is a superset of EUC-KR, so the distribution should be
+        #       not different.
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "CP949"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/enums.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/enums.py
new file mode 100644
index 00000000..04512072
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/enums.py
@@ -0,0 +1,76 @@
+"""
+All of the Enums that are used throughout the chardet package.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+
+class InputState(object):
+    """
+    This enum represents the different states a universal detector can be in.
+    """
+    PURE_ASCII = 0
+    ESC_ASCII = 1
+    HIGH_BYTE = 2
+
+
+class LanguageFilter(object):
+    """
+    This enum represents the different language filters we can apply to a
+    ``UniversalDetector``.
+    """
+    CHINESE_SIMPLIFIED = 0x01
+    CHINESE_TRADITIONAL = 0x02
+    JAPANESE = 0x04
+    KOREAN = 0x08
+    NON_CJK = 0x10
+    ALL = 0x1F
+    CHINESE = CHINESE_SIMPLIFIED | CHINESE_TRADITIONAL
+    CJK = CHINESE | JAPANESE | KOREAN
+
+
+class ProbingState(object):
+    """
+    This enum represents the different states a prober can be in.
+    """
+    DETECTING = 0
+    FOUND_IT = 1
+    NOT_ME = 2
+
+
+class MachineState(object):
+    """
+    This enum represents the different states a state machine can be in.
+    """
+    START = 0
+    ERROR = 1
+    ITS_ME = 2
+
+
+class SequenceLikelihood(object):
+    """
+    This enum represents the likelihood of a character following the previous one.
+    """
+    NEGATIVE = 0
+    UNLIKELY = 1
+    LIKELY = 2
+    POSITIVE = 3
+
+    @classmethod
+    def get_num_categories(cls):
+        """:returns: The number of likelihood categories in the enum."""
+        return 4
+
+
+class CharacterCategory(object):
+    """
+    This enum represents the different categories language models for
+    ``SingleByteCharsetProber`` put characters into.
+
+    Anything less than CONTROL is considered a letter.
+    """
+    UNDEFINED = 255
+    LINE_BREAK = 254
+    SYMBOL = 253
+    DIGIT = 252
+    CONTROL = 251
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escprober.py
new file mode 100644
index 00000000..c70493f2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escprober.py
@@ -0,0 +1,101 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .codingstatemachine import CodingStateMachine
+from .enums import LanguageFilter, ProbingState, MachineState
+from .escsm import (HZ_SM_MODEL, ISO2022CN_SM_MODEL, ISO2022JP_SM_MODEL,
+                    ISO2022KR_SM_MODEL)
+
+
+class EscCharSetProber(CharSetProber):
+    """
+    This CharSetProber uses a "code scheme" approach for detecting encodings,
+    whereby easily recognizable escape or shift sequences are relied on to
+    identify these encodings.
+    """
+
+    def __init__(self, lang_filter=None):
+        super(EscCharSetProber, self).__init__(lang_filter=lang_filter)
+        self.coding_sm = []
+        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
+            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
+            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
+        if self.lang_filter & LanguageFilter.JAPANESE:
+            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
+        if self.lang_filter & LanguageFilter.KOREAN:
+            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
+        self.active_sm_count = None
+        self._detected_charset = None
+        self._detected_language = None
+        self._state = None
+        self.reset()
+
+    def reset(self):
+        super(EscCharSetProber, self).reset()
+        for coding_sm in self.coding_sm:
+            if not coding_sm:
+                continue
+            coding_sm.active = True
+            coding_sm.reset()
+        self.active_sm_count = len(self.coding_sm)
+        self._detected_charset = None
+        self._detected_language = None
+
+    @property
+    def charset_name(self):
+        return self._detected_charset
+
+    @property
+    def language(self):
+        return self._detected_language
+
+    def get_confidence(self):
+        if self._detected_charset:
+            return 0.99
+        else:
+            return 0.00
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            for coding_sm in self.coding_sm:
+                if not coding_sm or not coding_sm.active:
+                    continue
+                coding_state = coding_sm.next_state(c)
+                if coding_state == MachineState.ERROR:
+                    coding_sm.active = False
+                    self.active_sm_count -= 1
+                    if self.active_sm_count <= 0:
+                        self._state = ProbingState.NOT_ME
+                        return self.state
+                elif coding_state == MachineState.ITS_ME:
+                    self._state = ProbingState.FOUND_IT
+                    self._detected_charset = coding_sm.get_coding_state_machine()
+                    self._detected_language = coding_sm.language
+                    return self.state
+
+        return self.state
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escsm.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escsm.py
new file mode 100644
index 00000000..0069523a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/escsm.py
@@ -0,0 +1,246 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+HZ_CLS = (
+1,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,0,0,0,0,  # 20 - 27
+0,0,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,0,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,4,0,5,2,0,  # 78 - 7f
+1,1,1,1,1,1,1,1,  # 80 - 87
+1,1,1,1,1,1,1,1,  # 88 - 8f
+1,1,1,1,1,1,1,1,  # 90 - 97
+1,1,1,1,1,1,1,1,  # 98 - 9f
+1,1,1,1,1,1,1,1,  # a0 - a7
+1,1,1,1,1,1,1,1,  # a8 - af
+1,1,1,1,1,1,1,1,  # b0 - b7
+1,1,1,1,1,1,1,1,  # b8 - bf
+1,1,1,1,1,1,1,1,  # c0 - c7
+1,1,1,1,1,1,1,1,  # c8 - cf
+1,1,1,1,1,1,1,1,  # d0 - d7
+1,1,1,1,1,1,1,1,  # d8 - df
+1,1,1,1,1,1,1,1,  # e0 - e7
+1,1,1,1,1,1,1,1,  # e8 - ef
+1,1,1,1,1,1,1,1,  # f0 - f7
+1,1,1,1,1,1,1,1,  # f8 - ff
+)
+
+HZ_ST = (
+MachineState.START,MachineState.ERROR,     3,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,     4,MachineState.ERROR,# 10-17
+     5,MachineState.ERROR,     6,MachineState.ERROR,     5,     5,     4,MachineState.ERROR,# 18-1f
+     4,MachineState.ERROR,     4,     4,     4,MachineState.ERROR,     4,MachineState.ERROR,# 20-27
+     4,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 28-2f
+)
+
+HZ_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+HZ_SM_MODEL = {'class_table': HZ_CLS,
+               'class_factor': 6,
+               'state_table': HZ_ST,
+               'char_len_table': HZ_CHAR_LEN_TABLE,
+               'name': "HZ-GB-2312",
+               'language': 'Chinese'}
+
+ISO2022CN_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,0,0,0,0,  # 20 - 27
+0,3,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,4,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022CN_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
+MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
+MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,# 18-1f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 20-27
+     5,     6,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 28-2f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 30-37
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,# 38-3f
+)
+
+ISO2022CN_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022CN_SM_MODEL = {'class_table': ISO2022CN_CLS,
+                      'class_factor': 9,
+                      'state_table': ISO2022CN_ST,
+                      'char_len_table': ISO2022CN_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-CN",
+                      'language': 'Chinese'}
+
+ISO2022JP_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,2,2,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,7,0,0,0,  # 20 - 27
+3,0,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+6,0,4,0,8,0,0,0,  # 40 - 47
+0,9,5,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022JP_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
+MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,# 18-1f
+MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 20-27
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     6,MachineState.ITS_ME,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,# 28-2f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,# 30-37
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 38-3f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.START,# 40-47
+)
+
+ISO2022JP_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022JP_SM_MODEL = {'class_table': ISO2022JP_CLS,
+                      'class_factor': 10,
+                      'state_table': ISO2022JP_ST,
+                      'char_len_table': ISO2022JP_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-JP",
+                      'language': 'Japanese'}
+
+ISO2022KR_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,3,0,0,0,  # 20 - 27
+0,4,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,5,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022KR_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 10-17
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 18-1f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 20-27
+)
+
+ISO2022KR_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+ISO2022KR_SM_MODEL = {'class_table': ISO2022KR_CLS,
+                      'class_factor': 6,
+                      'state_table': ISO2022KR_ST,
+                      'char_len_table': ISO2022KR_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-KR",
+                      'language': 'Korean'}
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/eucjpprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/eucjpprober.py
new file mode 100644
index 00000000..20ce8f7d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/eucjpprober.py
@@ -0,0 +1,92 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import ProbingState, MachineState
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCJPDistributionAnalysis
+from .jpcntx import EUCJPContextAnalysis
+from .mbcssm import EUCJP_SM_MODEL
+
+
+class EUCJPProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCJPProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
+        self.distribution_analyzer = EUCJPDistributionAnalysis()
+        self.context_analyzer = EUCJPContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super(EUCJPProber, self).reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-JP"
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            # PY3K: byte_str is a byte array, so byte_str[i] is an int, not a byte
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.context_analyzer.feed(self._last_char, char_len)
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(byte_str[i - 1:i + 1],
+                                                char_len)
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                     char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.context_analyzer.got_enough_data() and
+               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrfreq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrfreq.py
new file mode 100644
index 00000000..b68078cb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrfreq.py
@@ -0,0 +1,195 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+
+# 128  --> 0.79
+# 256  --> 0.92
+# 512  --> 0.986
+# 1024 --> 0.99944
+# 2048 --> 0.99999
+#
+# Idea Distribution Ratio = 0.98653 / (1-0.98653) = 73.24
+# Random Distribution Ration = 512 / (2350-512) = 0.279.
+#
+# Typical Distribution Ratio
+
+EUCKR_TYPICAL_DISTRIBUTION_RATIO = 6.0
+
+EUCKR_TABLE_SIZE = 2352
+
+# Char to FreqOrder table ,
+EUCKR_CHAR_TO_FREQ_ORDER = (
+  13, 130, 120,1396, 481,1719,1720, 328, 609, 212,1721, 707, 400, 299,1722,  87,
+1397,1723, 104, 536,1117,1203,1724,1267, 685,1268, 508,1725,1726,1727,1728,1398,
+1399,1729,1730,1731, 141, 621, 326,1057, 368,1732, 267, 488,  20,1733,1269,1734,
+ 945,1400,1735,  47, 904,1270,1736,1737, 773, 248,1738, 409, 313, 786, 429,1739,
+ 116, 987, 813,1401, 683,  75,1204, 145,1740,1741,1742,1743,  16, 847, 667, 622,
+ 708,1744,1745,1746, 966, 787, 304, 129,1747,  60, 820, 123, 676,1748,1749,1750,
+1751, 617,1752, 626,1753,1754,1755,1756, 653,1757,1758,1759,1760,1761,1762, 856,
+ 344,1763,1764,1765,1766,  89, 401, 418, 806, 905, 848,1767,1768,1769, 946,1205,
+ 709,1770,1118,1771, 241,1772,1773,1774,1271,1775, 569,1776, 999,1777,1778,1779,
+1780, 337, 751,1058,  28, 628, 254,1781, 177, 906, 270, 349, 891,1079,1782,  19,
+1783, 379,1784, 315,1785, 629, 754,1402, 559,1786, 636, 203,1206,1787, 710, 567,
+1788, 935, 814,1789,1790,1207, 766, 528,1791,1792,1208,1793,1794,1795,1796,1797,
+1403,1798,1799, 533,1059,1404,1405,1156,1406, 936, 884,1080,1800, 351,1801,1802,
+1803,1804,1805, 801,1806,1807,1808,1119,1809,1157, 714, 474,1407,1810, 298, 899,
+ 885,1811,1120, 802,1158,1812, 892,1813,1814,1408, 659,1815,1816,1121,1817,1818,
+1819,1820,1821,1822, 319,1823, 594, 545,1824, 815, 937,1209,1825,1826, 573,1409,
+1022,1827,1210,1828,1829,1830,1831,1832,1833, 556, 722, 807,1122,1060,1834, 697,
+1835, 900, 557, 715,1836,1410, 540,1411, 752,1159, 294, 597,1211, 976, 803, 770,
+1412,1837,1838,  39, 794,1413, 358,1839, 371, 925,1840, 453, 661, 788, 531, 723,
+ 544,1023,1081, 869,  91,1841, 392, 430, 790, 602,1414, 677,1082, 457,1415,1416,
+1842,1843, 475, 327,1024,1417, 795, 121,1844, 733, 403,1418,1845,1846,1847, 300,
+ 119, 711,1212, 627,1848,1272, 207,1849,1850, 796,1213, 382,1851, 519,1852,1083,
+ 893,1853,1854,1855, 367, 809, 487, 671,1856, 663,1857,1858, 956, 471, 306, 857,
+1859,1860,1160,1084,1861,1862,1863,1864,1865,1061,1866,1867,1868,1869,1870,1871,
+ 282,  96, 574,1872, 502,1085,1873,1214,1874, 907,1875,1876, 827, 977,1419,1420,
+1421, 268,1877,1422,1878,1879,1880, 308,1881,   2, 537,1882,1883,1215,1884,1885,
+ 127, 791,1886,1273,1423,1887,  34, 336, 404, 643,1888, 571, 654, 894, 840,1889,
+   0, 886,1274, 122, 575, 260, 908, 938,1890,1275, 410, 316,1891,1892, 100,1893,
+1894,1123,  48,1161,1124,1025,1895, 633, 901,1276,1896,1897, 115, 816,1898, 317,
+1899, 694,1900, 909, 734,1424, 572, 866,1425, 691,  85, 524,1010, 543, 394, 841,
+1901,1902,1903,1026,1904,1905,1906,1907,1908,1909,  30, 451, 651, 988, 310,1910,
+1911,1426, 810,1216,  93,1912,1913,1277,1217,1914, 858, 759,  45,  58, 181, 610,
+ 269,1915,1916, 131,1062, 551, 443,1000, 821,1427, 957, 895,1086,1917,1918, 375,
+1919, 359,1920, 687,1921, 822,1922, 293,1923,1924,  40, 662, 118, 692,  29, 939,
+ 887, 640, 482, 174,1925,  69,1162, 728,1428, 910,1926,1278,1218,1279, 386, 870,
+ 217, 854,1163, 823,1927,1928,1929,1930, 834,1931,  78,1932, 859,1933,1063,1934,
+1935,1936,1937, 438,1164, 208, 595,1938,1939,1940,1941,1219,1125,1942, 280, 888,
+1429,1430,1220,1431,1943,1944,1945,1946,1947,1280, 150, 510,1432,1948,1949,1950,
+1951,1952,1953,1954,1011,1087,1955,1433,1043,1956, 881,1957, 614, 958,1064,1065,
+1221,1958, 638,1001, 860, 967, 896,1434, 989, 492, 553,1281,1165,1959,1282,1002,
+1283,1222,1960,1961,1962,1963,  36, 383, 228, 753, 247, 454,1964, 876, 678,1965,
+1966,1284, 126, 464, 490, 835, 136, 672, 529, 940,1088,1435, 473,1967,1968, 467,
+  50, 390, 227, 587, 279, 378, 598, 792, 968, 240, 151, 160, 849, 882,1126,1285,
+ 639,1044, 133, 140, 288, 360, 811, 563,1027, 561, 142, 523,1969,1970,1971,   7,
+ 103, 296, 439, 407, 506, 634, 990,1972,1973,1974,1975, 645,1976,1977,1978,1979,
+1980,1981, 236,1982,1436,1983,1984,1089, 192, 828, 618, 518,1166, 333,1127,1985,
+ 818,1223,1986,1987,1988,1989,1990,1991,1992,1993, 342,1128,1286, 746, 842,1994,
+1995, 560, 223,1287,  98,   8, 189, 650, 978,1288,1996,1437,1997,  17, 345, 250,
+ 423, 277, 234, 512, 226,  97, 289,  42, 167,1998, 201,1999,2000, 843, 836, 824,
+ 532, 338, 783,1090, 182, 576, 436,1438,1439, 527, 500,2001, 947, 889,2002,2003,
+2004,2005, 262, 600, 314, 447,2006, 547,2007, 693, 738,1129,2008,  71,1440, 745,
+ 619, 688,2009, 829,2010,2011, 147,2012,  33, 948,2013,2014,  74, 224,2015,  61,
+ 191, 918, 399, 637,2016,1028,1130, 257, 902,2017,2018,2019,2020,2021,2022,2023,
+2024,2025,2026, 837,2027,2028,2029,2030, 179, 874, 591,  52, 724, 246,2031,2032,
+2033,2034,1167, 969,2035,1289, 630, 605, 911,1091,1168,2036,2037,2038,1441, 912,
+2039, 623,2040,2041, 253,1169,1290,2042,1442, 146, 620, 611, 577, 433,2043,1224,
+ 719,1170, 959, 440, 437, 534,  84, 388, 480,1131, 159, 220, 198, 679,2044,1012,
+ 819,1066,1443, 113,1225, 194, 318,1003,1029,2045,2046,2047,2048,1067,2049,2050,
+2051,2052,2053,  59, 913, 112,2054, 632,2055, 455, 144, 739,1291,2056, 273, 681,
+ 499,2057, 448,2058,2059, 760,2060,2061, 970, 384, 169, 245,1132,2062,2063, 414,
+1444,2064,2065,  41, 235,2066, 157, 252, 877, 568, 919, 789, 580,2067, 725,2068,
+2069,1292,2070,2071,1445,2072,1446,2073,2074,  55, 588,  66,1447, 271,1092,2075,
+1226,2076, 960,1013, 372,2077,2078,2079,2080,2081,1293,2082,2083,2084,2085, 850,
+2086,2087,2088,2089,2090, 186,2091,1068, 180,2092,2093,2094, 109,1227, 522, 606,
+2095, 867,1448,1093, 991,1171, 926, 353,1133,2096, 581,2097,2098,2099,1294,1449,
+1450,2100, 596,1172,1014,1228,2101,1451,1295,1173,1229,2102,2103,1296,1134,1452,
+ 949,1135,2104,2105,1094,1453,1454,1455,2106,1095,2107,2108,2109,2110,2111,2112,
+2113,2114,2115,2116,2117, 804,2118,2119,1230,1231, 805,1456, 405,1136,2120,2121,
+2122,2123,2124, 720, 701,1297, 992,1457, 927,1004,2125,2126,2127,2128,2129,2130,
+  22, 417,2131, 303,2132, 385,2133, 971, 520, 513,2134,1174,  73,1096, 231, 274,
+ 962,1458, 673,2135,1459,2136, 152,1137,2137,2138,2139,2140,1005,1138,1460,1139,
+2141,2142,2143,2144,  11, 374, 844,2145, 154,1232,  46,1461,2146, 838, 830, 721,
+1233, 106,2147,  90, 428, 462, 578, 566,1175, 352,2148,2149, 538,1234, 124,1298,
+2150,1462, 761, 565,2151, 686,2152, 649,2153,  72, 173,2154, 460, 415,2155,1463,
+2156,1235, 305,2157,2158,2159,2160,2161,2162, 579,2163,2164,2165,2166,2167, 747,
+2168,2169,2170,2171,1464, 669,2172,2173,2174,2175,2176,1465,2177,  23, 530, 285,
+2178, 335, 729,2179, 397,2180,2181,2182,1030,2183,2184, 698,2185,2186, 325,2187,
+2188, 369,2189, 799,1097,1015, 348,2190,1069, 680,2191, 851,1466,2192,2193,  10,
+2194, 613, 424,2195, 979, 108, 449, 589,  27, 172,  81,1031,  80, 774, 281, 350,
+1032, 525, 301, 582,1176,2196, 674,1045,2197,2198,1467, 730, 762,2199,2200,2201,
+2202,1468,2203, 993,2204,2205, 266,1070, 963,1140,2206,2207,2208, 664,1098, 972,
+2209,2210,2211,1177,1469,1470, 871,2212,2213,2214,2215,2216,1471,2217,2218,2219,
+2220,2221,2222,2223,2224,2225,2226,2227,1472,1236,2228,2229,2230,2231,2232,2233,
+2234,2235,1299,2236,2237, 200,2238, 477, 373,2239,2240, 731, 825, 777,2241,2242,
+2243, 521, 486, 548,2244,2245,2246,1473,1300,  53, 549, 137, 875,  76, 158,2247,
+1301,1474, 469, 396,1016, 278, 712,2248, 321, 442, 503, 767, 744, 941,1237,1178,
+1475,2249,  82, 178,1141,1179, 973,2250,1302,2251, 297,2252,2253, 570,2254,2255,
+2256,  18, 450, 206,2257, 290, 292,1142,2258, 511, 162,  99, 346, 164, 735,2259,
+1476,1477,   4, 554, 343, 798,1099,2260,1100,2261,  43, 171,1303, 139, 215,2262,
+2263, 717, 775,2264,1033, 322, 216,2265, 831,2266, 149,2267,1304,2268,2269, 702,
+1238, 135, 845, 347, 309,2270, 484,2271, 878, 655, 238,1006,1478,2272,  67,2273,
+ 295,2274,2275, 461,2276, 478, 942, 412,2277,1034,2278,2279,2280, 265,2281, 541,
+2282,2283,2284,2285,2286,  70, 852,1071,2287,2288,2289,2290,  21,  56, 509, 117,
+ 432,2291,2292, 331, 980, 552,1101, 148, 284, 105, 393,1180,1239, 755,2293, 187,
+2294,1046,1479,2295, 340,2296,  63,1047, 230,2297,2298,1305, 763,1306, 101, 800,
+ 808, 494,2299,2300,2301, 903,2302,  37,1072,  14,   5,2303,  79, 675,2304, 312,
+2305,2306,2307,2308,2309,1480,   6,1307,2310,2311,2312,   1, 470,  35,  24, 229,
+2313, 695, 210,  86, 778,  15, 784, 592, 779,  32,  77, 855, 964,2314, 259,2315,
+ 501, 380,2316,2317,  83, 981, 153, 689,1308,1481,1482,1483,2318,2319, 716,1484,
+2320,2321,2322,2323,2324,2325,1485,2326,2327, 128,  57,  68, 261,1048, 211, 170,
+1240,  31,2328,  51, 435, 742,2329,2330,2331, 635,2332, 264, 456,2333,2334,2335,
+ 425,2336,1486, 143, 507, 263, 943,2337, 363, 920,1487, 256,1488,1102, 243, 601,
+1489,2338,2339,2340,2341,2342,2343,2344, 861,2345,2346,2347,2348,2349,2350, 395,
+2351,1490,1491,  62, 535, 166, 225,2352,2353, 668, 419,1241, 138, 604, 928,2354,
+1181,2355,1492,1493,2356,2357,2358,1143,2359, 696,2360, 387, 307,1309, 682, 476,
+2361,2362, 332,  12, 222, 156,2363, 232,2364, 641, 276, 656, 517,1494,1495,1035,
+ 416, 736,1496,2365,1017, 586,2366,2367,2368,1497,2369, 242,2370,2371,2372,1498,
+2373, 965, 713,2374,2375,2376,2377, 740, 982,1499, 944,1500,1007,2378,2379,1310,
+1501,2380,2381,2382, 785, 329,2383,2384,1502,2385,2386,2387, 932,2388,1503,2389,
+2390,2391,2392,1242,2393,2394,2395,2396,2397, 994, 950,2398,2399,2400,2401,1504,
+1311,2402,2403,2404,2405,1049, 749,2406,2407, 853, 718,1144,1312,2408,1182,1505,
+2409,2410, 255, 516, 479, 564, 550, 214,1506,1507,1313, 413, 239, 444, 339,1145,
+1036,1508,1509,1314,1037,1510,1315,2411,1511,2412,2413,2414, 176, 703, 497, 624,
+ 593, 921, 302,2415, 341, 165,1103,1512,2416,1513,2417,2418,2419, 376,2420, 700,
+2421,2422,2423, 258, 768,1316,2424,1183,2425, 995, 608,2426,2427,2428,2429, 221,
+2430,2431,2432,2433,2434,2435,2436,2437, 195, 323, 726, 188, 897, 983,1317, 377,
+ 644,1050, 879,2438, 452,2439,2440,2441,2442,2443,2444, 914,2445,2446,2447,2448,
+ 915, 489,2449,1514,1184,2450,2451, 515,  64, 427, 495,2452, 583,2453, 483, 485,
+1038, 562, 213,1515, 748, 666,2454,2455,2456,2457, 334,2458, 780, 996,1008, 705,
+1243,2459,2460,2461,2462,2463, 114,2464, 493,1146, 366, 163,1516, 961,1104,2465,
+ 291,2466,1318,1105,2467,1517, 365,2468, 355, 951,1244,2469,1319,2470, 631,2471,
+2472, 218,1320, 364, 320, 756,1518,1519,1321,1520,1322,2473,2474,2475,2476, 997,
+2477,2478,2479,2480, 665,1185,2481, 916,1521,2482,2483,2484, 584, 684,2485,2486,
+ 797,2487,1051,1186,2488,2489,2490,1522,2491,2492, 370,2493,1039,1187,  65,2494,
+ 434, 205, 463,1188,2495, 125, 812, 391, 402, 826, 699, 286, 398, 155, 781, 771,
+ 585,2496, 590, 505,1073,2497, 599, 244, 219, 917,1018, 952, 646,1523,2498,1323,
+2499,2500,  49, 984, 354, 741,2501, 625,2502,1324,2503,1019, 190, 357, 757, 491,
+  95, 782, 868,2504,2505,2506,2507,2508,2509, 134,1524,1074, 422,1525, 898,2510,
+ 161,2511,2512,2513,2514, 769,2515,1526,2516,2517, 411,1325,2518, 472,1527,2519,
+2520,2521,2522,2523,2524, 985,2525,2526,2527,2528,2529,2530, 764,2531,1245,2532,
+2533,  25, 204, 311,2534, 496,2535,1052,2536,2537,2538,2539,2540,2541,2542, 199,
+ 704, 504, 468, 758, 657,1528, 196,  44, 839,1246, 272, 750,2543, 765, 862,2544,
+2545,1326,2546, 132, 615, 933,2547, 732,2548,2549,2550,1189,1529,2551, 283,1247,
+1053, 607, 929,2552,2553,2554, 930, 183, 872, 616,1040,1147,2555,1148,1020, 441,
+ 249,1075,2556,2557,2558, 466, 743,2559,2560,2561,  92, 514, 426, 420, 526,2562,
+2563,2564,2565,2566,2567,2568, 185,2569,2570,2571,2572, 776,1530, 658,2573, 362,
+2574, 361, 922,1076, 793,2575,2576,2577,2578,2579,2580,1531, 251,2581,2582,2583,
+2584,1532,  54, 612, 237,1327,2585,2586, 275, 408, 647, 111,2587,1533,1106, 465,
+   3, 458,   9,  38,2588, 107, 110, 890, 209,  26, 737, 498,2589,1534,2590, 431,
+ 202,  88,1535, 356, 287,1107, 660,1149,2591, 381,1536, 986,1150, 445,1248,1151,
+ 974,2592,2593, 846,2594, 446, 953, 184,1249,1250, 727,2595, 923, 193, 883,2596,
+2597,2598, 102, 324, 539, 817,2599, 421,1041,2600, 832,2601,  94, 175, 197, 406,
+2602, 459,2603,2604,2605,2606,2607, 330, 555,2608,2609,2610, 706,1108, 389,2611,
+2612,2613,2614, 233,2615, 833, 558, 931, 954,1251,2616,2617,1537, 546,2618,2619,
+1009,2620,2621,2622,1538, 690,1328,2623, 955,2624,1539,2625,2626, 772,2627,2628,
+2629,2630,2631, 924, 648, 863, 603,2632,2633, 934,1540, 864, 865,2634, 642,1042,
+ 670,1190,2635,2636,2637,2638, 168,2639, 652, 873, 542,1054,1541,2640,2641,2642,  # 512, 256
+)
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrprober.py
new file mode 100644
index 00000000..345a060d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euckrprober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCKRDistributionAnalysis
+from .mbcssm import EUCKR_SM_MODEL
+
+
+class EUCKRProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCKRProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCKR_SM_MODEL)
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-KR"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwfreq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwfreq.py
new file mode 100644
index 00000000..ed7a995a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwfreq.py
@@ -0,0 +1,387 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# EUCTW frequency table
+# Converted from big5 work
+# by Taiwan's Mandarin Promotion Council
+# <http:#www.edu.tw:81/mandr/>
+
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Idea Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+EUCTW_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+# Char to FreqOrder table ,
+EUCTW_TABLE_SIZE = 5376
+
+EUCTW_CHAR_TO_FREQ_ORDER = (
+   1,1800,1506, 255,1431, 198,   9,  82,   6,7310, 177, 202,3615,1256,2808, 110,  # 2742
+3735,  33,3241, 261,  76,  44,2113,  16,2931,2184,1176, 659,3868,  26,3404,2643,  # 2758
+1198,3869,3313,4060, 410,2211, 302, 590, 361,1963,   8, 204,  58,4296,7311,1931,  # 2774
+  63,7312,7313, 317,1614,  75, 222, 159,4061,2412,1480,7314,3500,3068, 224,2809,  # 2790
+3616,   3,  10,3870,1471,  29,2774,1135,2852,1939, 873, 130,3242,1123, 312,7315,  # 2806
+4297,2051, 507, 252, 682,7316, 142,1914, 124, 206,2932,  34,3501,3173,  64, 604,  # 2822
+7317,2494,1976,1977, 155,1990, 645, 641,1606,7318,3405, 337,  72, 406,7319,  80,  # 2838
+ 630, 238,3174,1509, 263, 939,1092,2644, 756,1440,1094,3406, 449,  69,2969, 591,  # 2854
+ 179,2095, 471, 115,2034,1843,  60,  50,2970, 134, 806,1868, 734,2035,3407, 180,  # 2870
+ 995,1607, 156, 537,2893, 688,7320, 319,1305, 779,2144, 514,2374, 298,4298, 359,  # 2886
+2495,  90,2707,1338, 663,  11, 906,1099,2545,  20,2436, 182, 532,1716,7321, 732,  # 2902
+1376,4062,1311,1420,3175,  25,2312,1056, 113, 399, 382,1949, 242,3408,2467, 529,  # 2918
+3243, 475,1447,3617,7322, 117,  21, 656, 810,1297,2295,2329,3502,7323, 126,4063,  # 2934
+ 706, 456, 150, 613,4299,  71,1118,2036,4064, 145,3069,  85, 835, 486,2114,1246,  # 2950
+1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,7324,2127,2354, 347,3736, 221,  # 2966
+3503,3110,7325,1955,1153,4065,  83, 296,1199,3070, 192, 624,  93,7326, 822,1897,  # 2982
+2810,3111, 795,2064, 991,1554,1542,1592,  27,  43,2853, 859, 139,1456, 860,4300,  # 2998
+ 437, 712,3871, 164,2392,3112, 695, 211,3017,2096, 195,3872,1608,3504,3505,3618,  # 3014
+3873, 234, 811,2971,2097,3874,2229,1441,3506,1615,2375, 668,2076,1638, 305, 228,  # 3030
+1664,4301, 467, 415,7327, 262,2098,1593, 239, 108, 300, 200,1033, 512,1247,2077,  # 3046
+7328,7329,2173,3176,3619,2673, 593, 845,1062,3244,  88,1723,2037,3875,1950, 212,  # 3062
+ 266, 152, 149, 468,1898,4066,4302,  77, 187,7330,3018,  37,   5,2972,7331,3876,  # 3078
+7332,7333,  39,2517,4303,2894,3177,2078,  55, 148,  74,4304, 545, 483,1474,1029,  # 3094
+1665, 217,1869,1531,3113,1104,2645,4067,  24, 172,3507, 900,3877,3508,3509,4305,  # 3110
+  32,1408,2811,1312, 329, 487,2355,2247,2708, 784,2674,   4,3019,3314,1427,1788,  # 3126
+ 188, 109, 499,7334,3620,1717,1789, 888,1217,3020,4306,7335,3510,7336,3315,1520,  # 3142
+3621,3878, 196,1034, 775,7337,7338, 929,1815, 249, 439,  38,7339,1063,7340, 794,  # 3158
+3879,1435,2296,  46, 178,3245,2065,7341,2376,7342, 214,1709,4307, 804,  35, 707,  # 3174
+ 324,3622,1601,2546, 140, 459,4068,7343,7344,1365, 839, 272, 978,2257,2572,3409,  # 3190
+2128,1363,3623,1423, 697, 100,3071,  48,  70,1231, 495,3114,2193,7345,1294,7346,  # 3206
+2079, 462, 586,1042,3246, 853, 256, 988, 185,2377,3410,1698, 434,1084,7347,3411,  # 3222
+ 314,2615,2775,4308,2330,2331, 569,2280, 637,1816,2518, 757,1162,1878,1616,3412,  # 3238
+ 287,1577,2115, 768,4309,1671,2854,3511,2519,1321,3737, 909,2413,7348,4069, 933,  # 3254
+3738,7349,2052,2356,1222,4310, 765,2414,1322, 786,4311,7350,1919,1462,1677,2895,  # 3270
+1699,7351,4312,1424,2437,3115,3624,2590,3316,1774,1940,3413,3880,4070, 309,1369,  # 3286
+1130,2812, 364,2230,1653,1299,3881,3512,3882,3883,2646, 525,1085,3021, 902,2000,  # 3302
+1475, 964,4313, 421,1844,1415,1057,2281, 940,1364,3116, 376,4314,4315,1381,   7,  # 3318
+2520, 983,2378, 336,1710,2675,1845, 321,3414, 559,1131,3022,2742,1808,1132,1313,  # 3334
+ 265,1481,1857,7352, 352,1203,2813,3247, 167,1089, 420,2814, 776, 792,1724,3513,  # 3350
+4071,2438,3248,7353,4072,7354, 446, 229, 333,2743, 901,3739,1200,1557,4316,2647,  # 3366
+1920, 395,2744,2676,3740,4073,1835, 125, 916,3178,2616,4317,7355,7356,3741,7357,  # 3382
+7358,7359,4318,3117,3625,1133,2547,1757,3415,1510,2313,1409,3514,7360,2145, 438,  # 3398
+2591,2896,2379,3317,1068, 958,3023, 461, 311,2855,2677,4074,1915,3179,4075,1978,  # 3414
+ 383, 750,2745,2617,4076, 274, 539, 385,1278,1442,7361,1154,1964, 384, 561, 210,  # 3430
+  98,1295,2548,3515,7362,1711,2415,1482,3416,3884,2897,1257, 129,7363,3742, 642,  # 3446
+ 523,2776,2777,2648,7364, 141,2231,1333,  68, 176, 441, 876, 907,4077, 603,2592,  # 3462
+ 710, 171,3417, 404, 549,  18,3118,2393,1410,3626,1666,7365,3516,4319,2898,4320,  # 3478
+7366,2973, 368,7367, 146, 366,  99, 871,3627,1543, 748, 807,1586,1185,  22,2258,  # 3494
+ 379,3743,3180,7368,3181, 505,1941,2618,1991,1382,2314,7369, 380,2357, 218, 702,  # 3510
+1817,1248,3418,3024,3517,3318,3249,7370,2974,3628, 930,3250,3744,7371,  59,7372,  # 3526
+ 585, 601,4078, 497,3419,1112,1314,4321,1801,7373,1223,1472,2174,7374, 749,1836,  # 3542
+ 690,1899,3745,1772,3885,1476, 429,1043,1790,2232,2116, 917,4079, 447,1086,1629,  # 3558
+7375, 556,7376,7377,2020,1654, 844,1090, 105, 550, 966,1758,2815,1008,1782, 686,  # 3574
+1095,7378,2282, 793,1602,7379,3518,2593,4322,4080,2933,2297,4323,3746, 980,2496,  # 3590
+ 544, 353, 527,4324, 908,2678,2899,7380, 381,2619,1942,1348,7381,1341,1252, 560,  # 3606
+3072,7382,3420,2856,7383,2053, 973, 886,2080, 143,4325,7384,7385, 157,3886, 496,  # 3622
+4081,  57, 840, 540,2038,4326,4327,3421,2117,1445, 970,2259,1748,1965,2081,4082,  # 3638
+3119,1234,1775,3251,2816,3629, 773,1206,2129,1066,2039,1326,3887,1738,1725,4083,  # 3654
+ 279,3120,  51,1544,2594, 423,1578,2130,2066, 173,4328,1879,7386,7387,1583, 264,  # 3670
+ 610,3630,4329,2439, 280, 154,7388,7389,7390,1739, 338,1282,3073, 693,2857,1411,  # 3686
+1074,3747,2440,7391,4330,7392,7393,1240, 952,2394,7394,2900,1538,2679, 685,1483,  # 3702
+4084,2468,1436, 953,4085,2054,4331, 671,2395,  79,4086,2441,3252, 608, 567,2680,  # 3718
+3422,4087,4088,1691, 393,1261,1791,2396,7395,4332,7396,7397,7398,7399,1383,1672,  # 3734
+3748,3182,1464, 522,1119, 661,1150, 216, 675,4333,3888,1432,3519, 609,4334,2681,  # 3750
+2397,7400,7401,7402,4089,3025,   0,7403,2469, 315, 231,2442, 301,3319,4335,2380,  # 3766
+7404, 233,4090,3631,1818,4336,4337,7405,  96,1776,1315,2082,7406, 257,7407,1809,  # 3782
+3632,2709,1139,1819,4091,2021,1124,2163,2778,1777,2649,7408,3074, 363,1655,3183,  # 3798
+7409,2975,7410,7411,7412,3889,1567,3890, 718, 103,3184, 849,1443, 341,3320,2934,  # 3814
+1484,7413,1712, 127,  67, 339,4092,2398, 679,1412, 821,7414,7415, 834, 738, 351,  # 3830
+2976,2146, 846, 235,1497,1880, 418,1992,3749,2710, 186,1100,2147,2746,3520,1545,  # 3846
+1355,2935,2858,1377, 583,3891,4093,2573,2977,7416,1298,3633,1078,2549,3634,2358,  # 3862
+  78,3750,3751, 267,1289,2099,2001,1594,4094, 348, 369,1274,2194,2175,1837,4338,  # 3878
+1820,2817,3635,2747,2283,2002,4339,2936,2748, 144,3321, 882,4340,3892,2749,3423,  # 3894
+4341,2901,7417,4095,1726, 320,7418,3893,3026, 788,2978,7419,2818,1773,1327,2859,  # 3910
+3894,2819,7420,1306,4342,2003,1700,3752,3521,2359,2650, 787,2022, 506, 824,3636,  # 3926
+ 534, 323,4343,1044,3322,2023,1900, 946,3424,7421,1778,1500,1678,7422,1881,4344,  # 3942
+ 165, 243,4345,3637,2521, 123, 683,4096, 764,4346,  36,3895,1792, 589,2902, 816,  # 3958
+ 626,1667,3027,2233,1639,1555,1622,3753,3896,7423,3897,2860,1370,1228,1932, 891,  # 3974
+2083,2903, 304,4097,7424, 292,2979,2711,3522, 691,2100,4098,1115,4347, 118, 662,  # 3990
+7425, 611,1156, 854,2381,1316,2861,   2, 386, 515,2904,7426,7427,3253, 868,2234,  # 4006
+1486, 855,2651, 785,2212,3028,7428,1040,3185,3523,7429,3121, 448,7430,1525,7431,  # 4022
+2164,4348,7432,3754,7433,4099,2820,3524,3122, 503, 818,3898,3123,1568, 814, 676,  # 4038
+1444, 306,1749,7434,3755,1416,1030, 197,1428, 805,2821,1501,4349,7435,7436,7437,  # 4054
+1993,7438,4350,7439,7440,2195,  13,2779,3638,2980,3124,1229,1916,7441,3756,2131,  # 4070
+7442,4100,4351,2399,3525,7443,2213,1511,1727,1120,7444,7445, 646,3757,2443, 307,  # 4086
+7446,7447,1595,3186,7448,7449,7450,3639,1113,1356,3899,1465,2522,2523,7451, 519,  # 4102
+7452, 128,2132,  92,2284,1979,7453,3900,1512, 342,3125,2196,7454,2780,2214,1980,  # 4118
+3323,7455, 290,1656,1317, 789, 827,2360,7456,3758,4352, 562, 581,3901,7457, 401,  # 4134
+4353,2248,  94,4354,1399,2781,7458,1463,2024,4355,3187,1943,7459, 828,1105,4101,  # 4150
+1262,1394,7460,4102, 605,4356,7461,1783,2862,7462,2822, 819,2101, 578,2197,2937,  # 4166
+7463,1502, 436,3254,4103,3255,2823,3902,2905,3425,3426,7464,2712,2315,7465,7466,  # 4182
+2332,2067,  23,4357, 193, 826,3759,2102, 699,1630,4104,3075, 390,1793,1064,3526,  # 4198
+7467,1579,3076,3077,1400,7468,4105,1838,1640,2863,7469,4358,4359, 137,4106, 598,  # 4214
+3078,1966, 780, 104, 974,2938,7470, 278, 899, 253, 402, 572, 504, 493,1339,7471,  # 4230
+3903,1275,4360,2574,2550,7472,3640,3029,3079,2249, 565,1334,2713, 863,  41,7473,  # 4246
+7474,4361,7475,1657,2333,  19, 463,2750,4107, 606,7476,2981,3256,1087,2084,1323,  # 4262
+2652,2982,7477,1631,1623,1750,4108,2682,7478,2864, 791,2714,2653,2334, 232,2416,  # 4278
+7479,2983,1498,7480,2654,2620, 755,1366,3641,3257,3126,2025,1609, 119,1917,3427,  # 4294
+ 862,1026,4109,7481,3904,3760,4362,3905,4363,2260,1951,2470,7482,1125, 817,4110,  # 4310
+4111,3906,1513,1766,2040,1487,4112,3030,3258,2824,3761,3127,7483,7484,1507,7485,  # 4326
+2683, 733,  40,1632,1106,2865, 345,4113, 841,2524, 230,4364,2984,1846,3259,3428,  # 4342
+7486,1263, 986,3429,7487, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562,3907,  # 4358
+3908,2939, 967,2751,2655,1349, 592,2133,1692,3324,2985,1994,4114,1679,3909,1901,  # 4374
+2185,7488, 739,3642,2715,1296,1290,7489,4115,2198,2199,1921,1563,2595,2551,1870,  # 4390
+2752,2986,7490, 435,7491, 343,1108, 596,  17,1751,4365,2235,3430,3643,7492,4366,  # 4406
+ 294,3527,2940,1693, 477, 979, 281,2041,3528, 643,2042,3644,2621,2782,2261,1031,  # 4422
+2335,2134,2298,3529,4367, 367,1249,2552,7493,3530,7494,4368,1283,3325,2004, 240,  # 4438
+1762,3326,4369,4370, 836,1069,3128, 474,7495,2148,2525, 268,3531,7496,3188,1521,  # 4454
+1284,7497,1658,1546,4116,7498,3532,3533,7499,4117,3327,2684,1685,4118, 961,1673,  # 4470
+2622, 190,2005,2200,3762,4371,4372,7500, 570,2497,3645,1490,7501,4373,2623,3260,  # 4486
+1956,4374, 584,1514, 396,1045,1944,7502,4375,1967,2444,7503,7504,4376,3910, 619,  # 4502
+7505,3129,3261, 215,2006,2783,2553,3189,4377,3190,4378, 763,4119,3763,4379,7506,  # 4518
+7507,1957,1767,2941,3328,3646,1174, 452,1477,4380,3329,3130,7508,2825,1253,2382,  # 4534
+2186,1091,2285,4120, 492,7509, 638,1169,1824,2135,1752,3911, 648, 926,1021,1324,  # 4550
+4381, 520,4382, 997, 847,1007, 892,4383,3764,2262,1871,3647,7510,2400,1784,4384,  # 4566
+1952,2942,3080,3191,1728,4121,2043,3648,4385,2007,1701,3131,1551,  30,2263,4122,  # 4582
+7511,2026,4386,3534,7512, 501,7513,4123, 594,3431,2165,1821,3535,3432,3536,3192,  # 4598
+ 829,2826,4124,7514,1680,3132,1225,4125,7515,3262,4387,4126,3133,2336,7516,4388,  # 4614
+4127,7517,3912,3913,7518,1847,2383,2596,3330,7519,4389, 374,3914, 652,4128,4129,  # 4630
+ 375,1140, 798,7520,7521,7522,2361,4390,2264, 546,1659, 138,3031,2445,4391,7523,  # 4646
+2250, 612,1848, 910, 796,3765,1740,1371, 825,3766,3767,7524,2906,2554,7525, 692,  # 4662
+ 444,3032,2624, 801,4392,4130,7526,1491, 244,1053,3033,4131,4132, 340,7527,3915,  # 4678
+1041,2987, 293,1168,  87,1357,7528,1539, 959,7529,2236, 721, 694,4133,3768, 219,  # 4694
+1478, 644,1417,3331,2656,1413,1401,1335,1389,3916,7530,7531,2988,2362,3134,1825,  # 4710
+ 730,1515, 184,2827,  66,4393,7532,1660,2943, 246,3332, 378,1457, 226,3433, 975,  # 4726
+3917,2944,1264,3537, 674, 696,7533, 163,7534,1141,2417,2166, 713,3538,3333,4394,  # 4742
+3918,7535,7536,1186,  15,7537,1079,1070,7538,1522,3193,3539, 276,1050,2716, 758,  # 4758
+1126, 653,2945,3263,7539,2337, 889,3540,3919,3081,2989, 903,1250,4395,3920,3434,  # 4774
+3541,1342,1681,1718, 766,3264, 286,  89,2946,3649,7540,1713,7541,2597,3334,2990,  # 4790
+7542,2947,2215,3194,2866,7543,4396,2498,2526, 181, 387,1075,3921, 731,2187,3335,  # 4806
+7544,3265, 310, 313,3435,2299, 770,4134,  54,3034, 189,4397,3082,3769,3922,7545,  # 4822
+1230,1617,1849, 355,3542,4135,4398,3336, 111,4136,3650,1350,3135,3436,3035,4137,  # 4838
+2149,3266,3543,7546,2784,3923,3924,2991, 722,2008,7547,1071, 247,1207,2338,2471,  # 4854
+1378,4399,2009, 864,1437,1214,4400, 373,3770,1142,2216, 667,4401, 442,2753,2555,  # 4870
+3771,3925,1968,4138,3267,1839, 837, 170,1107, 934,1336,1882,7548,7549,2118,4139,  # 4886
+2828, 743,1569,7550,4402,4140, 582,2384,1418,3437,7551,1802,7552, 357,1395,1729,  # 4902
+3651,3268,2418,1564,2237,7553,3083,3772,1633,4403,1114,2085,4141,1532,7554, 482,  # 4918
+2446,4404,7555,7556,1492, 833,1466,7557,2717,3544,1641,2829,7558,1526,1272,3652,  # 4934
+4142,1686,1794, 416,2556,1902,1953,1803,7559,3773,2785,3774,1159,2316,7560,2867,  # 4950
+4405,1610,1584,3036,2419,2754, 443,3269,1163,3136,7561,7562,3926,7563,4143,2499,  # 4966
+3037,4406,3927,3137,2103,1647,3545,2010,1872,4144,7564,4145, 431,3438,7565, 250,  # 4982
+  97,  81,4146,7566,1648,1850,1558, 160, 848,7567, 866, 740,1694,7568,2201,2830,  # 4998
+3195,4147,4407,3653,1687, 950,2472, 426, 469,3196,3654,3655,3928,7569,7570,1188,  # 5014
+ 424,1995, 861,3546,4148,3775,2202,2685, 168,1235,3547,4149,7571,2086,1674,4408,  # 5030
+3337,3270, 220,2557,1009,7572,3776, 670,2992, 332,1208, 717,7573,7574,3548,2447,  # 5046
+3929,3338,7575, 513,7576,1209,2868,3339,3138,4409,1080,7577,7578,7579,7580,2527,  # 5062
+3656,3549, 815,1587,3930,3931,7581,3550,3439,3777,1254,4410,1328,3038,1390,3932,  # 5078
+1741,3933,3778,3934,7582, 236,3779,2448,3271,7583,7584,3657,3780,1273,3781,4411,  # 5094
+7585, 308,7586,4412, 245,4413,1851,2473,1307,2575, 430, 715,2136,2449,7587, 270,  # 5110
+ 199,2869,3935,7588,3551,2718,1753, 761,1754, 725,1661,1840,4414,3440,3658,7589,  # 5126
+7590, 587,  14,3272, 227,2598, 326, 480,2265, 943,2755,3552, 291, 650,1883,7591,  # 5142
+1702,1226, 102,1547,  62,3441, 904,4415,3442,1164,4150,7592,7593,1224,1548,2756,  # 5158
+ 391, 498,1493,7594,1386,1419,7595,2055,1177,4416, 813, 880,1081,2363, 566,1145,  # 5174
+4417,2286,1001,1035,2558,2599,2238, 394,1286,7596,7597,2068,7598,  86,1494,1730,  # 5190
+3936, 491,1588, 745, 897,2948, 843,3340,3937,2757,2870,3273,1768, 998,2217,2069,  # 5206
+ 397,1826,1195,1969,3659,2993,3341, 284,7599,3782,2500,2137,2119,1903,7600,3938,  # 5222
+2150,3939,4151,1036,3443,1904, 114,2559,4152, 209,1527,7601,7602,2949,2831,2625,  # 5238
+2385,2719,3139, 812,2560,7603,3274,7604,1559, 737,1884,3660,1210, 885,  28,2686,  # 5254
+3553,3783,7605,4153,1004,1779,4418,7606, 346,1981,2218,2687,4419,3784,1742, 797,  # 5270
+1642,3940,1933,1072,1384,2151, 896,3941,3275,3661,3197,2871,3554,7607,2561,1958,  # 5286
+4420,2450,1785,7608,7609,7610,3942,4154,1005,1308,3662,4155,2720,4421,4422,1528,  # 5302
+2600, 161,1178,4156,1982, 987,4423,1101,4157, 631,3943,1157,3198,2420,1343,1241,  # 5318
+1016,2239,2562, 372, 877,2339,2501,1160, 555,1934, 911,3944,7611, 466,1170, 169,  # 5334
+1051,2907,2688,3663,2474,2994,1182,2011,2563,1251,2626,7612, 992,2340,3444,1540,  # 5350
+2721,1201,2070,2401,1996,2475,7613,4424, 528,1922,2188,1503,1873,1570,2364,3342,  # 5366
+3276,7614, 557,1073,7615,1827,3445,2087,2266,3140,3039,3084, 767,3085,2786,4425,  # 5382
+1006,4158,4426,2341,1267,2176,3664,3199, 778,3945,3200,2722,1597,2657,7616,4427,  # 5398
+7617,3446,7618,7619,7620,3277,2689,1433,3278, 131,  95,1504,3946, 723,4159,3141,  # 5414
+1841,3555,2758,2189,3947,2027,2104,3665,7621,2995,3948,1218,7622,3343,3201,3949,  # 5430
+4160,2576, 248,1634,3785, 912,7623,2832,3666,3040,3786, 654,  53,7624,2996,7625,  # 5446
+1688,4428, 777,3447,1032,3950,1425,7626, 191, 820,2120,2833, 971,4429, 931,3202,  # 5462
+ 135, 664, 783,3787,1997, 772,2908,1935,3951,3788,4430,2909,3203, 282,2723, 640,  # 5478
+1372,3448,1127, 922, 325,3344,7627,7628, 711,2044,7629,7630,3952,2219,2787,1936,  # 5494
+3953,3345,2220,2251,3789,2300,7631,4431,3790,1258,3279,3954,3204,2138,2950,3955,  # 5510
+3956,7632,2221, 258,3205,4432, 101,1227,7633,3280,1755,7634,1391,3281,7635,2910,  # 5526
+2056, 893,7636,7637,7638,1402,4161,2342,7639,7640,3206,3556,7641,7642, 878,1325,  # 5542
+1780,2788,4433, 259,1385,2577, 744,1183,2267,4434,7643,3957,2502,7644, 684,1024,  # 5558
+4162,7645, 472,3557,3449,1165,3282,3958,3959, 322,2152, 881, 455,1695,1152,1340,  # 5574
+ 660, 554,2153,4435,1058,4436,4163, 830,1065,3346,3960,4437,1923,7646,1703,1918,  # 5590
+7647, 932,2268, 122,7648,4438, 947, 677,7649,3791,2627, 297,1905,1924,2269,4439,  # 5606
+2317,3283,7650,7651,4164,7652,4165,  84,4166, 112, 989,7653, 547,1059,3961, 701,  # 5622
+3558,1019,7654,4167,7655,3450, 942, 639, 457,2301,2451, 993,2951, 407, 851, 494,  # 5638
+4440,3347, 927,7656,1237,7657,2421,3348, 573,4168, 680, 921,2911,1279,1874, 285,  # 5654
+ 790,1448,1983, 719,2167,7658,7659,4441,3962,3963,1649,7660,1541, 563,7661,1077,  # 5670
+7662,3349,3041,3451, 511,2997,3964,3965,3667,3966,1268,2564,3350,3207,4442,4443,  # 5686
+7663, 535,1048,1276,1189,2912,2028,3142,1438,1373,2834,2952,1134,2012,7664,4169,  # 5702
+1238,2578,3086,1259,7665, 700,7666,2953,3143,3668,4170,7667,4171,1146,1875,1906,  # 5718
+4444,2601,3967, 781,2422, 132,1589, 203, 147, 273,2789,2402, 898,1786,2154,3968,  # 5734
+3969,7668,3792,2790,7669,7670,4445,4446,7671,3208,7672,1635,3793, 965,7673,1804,  # 5750
+2690,1516,3559,1121,1082,1329,3284,3970,1449,3794,  65,1128,2835,2913,2759,1590,  # 5766
+3795,7674,7675,  12,2658,  45, 976,2579,3144,4447, 517,2528,1013,1037,3209,7676,  # 5782
+3796,2836,7677,3797,7678,3452,7679,2602, 614,1998,2318,3798,3087,2724,2628,7680,  # 5798
+2580,4172, 599,1269,7681,1810,3669,7682,2691,3088, 759,1060, 489,1805,3351,3285,  # 5814
+1358,7683,7684,2386,1387,1215,2629,2252, 490,7685,7686,4173,1759,2387,2343,7687,  # 5830
+4448,3799,1907,3971,2630,1806,3210,4449,3453,3286,2760,2344, 874,7688,7689,3454,  # 5846
+3670,1858,  91,2914,3671,3042,3800,4450,7690,3145,3972,2659,7691,3455,1202,1403,  # 5862
+3801,2954,2529,1517,2503,4451,3456,2504,7692,4452,7693,2692,1885,1495,1731,3973,  # 5878
+2365,4453,7694,2029,7695,7696,3974,2693,1216, 237,2581,4174,2319,3975,3802,4454,  # 5894
+4455,2694,3560,3457, 445,4456,7697,7698,7699,7700,2761,  61,3976,3672,1822,3977,  # 5910
+7701, 687,2045, 935, 925, 405,2660, 703,1096,1859,2725,4457,3978,1876,1367,2695,  # 5926
+3352, 918,2105,1781,2476, 334,3287,1611,1093,4458, 564,3146,3458,3673,3353, 945,  # 5942
+2631,2057,4459,7702,1925, 872,4175,7703,3459,2696,3089, 349,4176,3674,3979,4460,  # 5958
+3803,4177,3675,2155,3980,4461,4462,4178,4463,2403,2046, 782,3981, 400, 251,4179,  # 5974
+1624,7704,7705, 277,3676, 299,1265, 476,1191,3804,2121,4180,4181,1109, 205,7706,  # 5990
+2582,1000,2156,3561,1860,7707,7708,7709,4464,7710,4465,2565, 107,2477,2157,3982,  # 6006
+3460,3147,7711,1533, 541,1301, 158, 753,4182,2872,3562,7712,1696, 370,1088,4183,  # 6022
+4466,3563, 579, 327, 440, 162,2240, 269,1937,1374,3461, 968,3043,  56,1396,3090,  # 6038
+2106,3288,3354,7713,1926,2158,4467,2998,7714,3564,7715,7716,3677,4468,2478,7717,  # 6054
+2791,7718,1650,4469,7719,2603,7720,7721,3983,2661,3355,1149,3356,3984,3805,3985,  # 6070
+7722,1076,  49,7723, 951,3211,3289,3290, 450,2837, 920,7724,1811,2792,2366,4184,  # 6086
+1908,1138,2367,3806,3462,7725,3212,4470,1909,1147,1518,2423,4471,3807,7726,4472,  # 6102
+2388,2604, 260,1795,3213,7727,7728,3808,3291, 708,7729,3565,1704,7730,3566,1351,  # 6118
+1618,3357,2999,1886, 944,4185,3358,4186,3044,3359,4187,7731,3678, 422, 413,1714,  # 6134
+3292, 500,2058,2345,4188,2479,7732,1344,1910, 954,7733,1668,7734,7735,3986,2404,  # 6150
+4189,3567,3809,4190,7736,2302,1318,2505,3091, 133,3092,2873,4473, 629,  31,2838,  # 6166
+2697,3810,4474, 850, 949,4475,3987,2955,1732,2088,4191,1496,1852,7737,3988, 620,  # 6182
+3214, 981,1242,3679,3360,1619,3680,1643,3293,2139,2452,1970,1719,3463,2168,7738,  # 6198
+3215,7739,7740,3361,1828,7741,1277,4476,1565,2047,7742,1636,3568,3093,7743, 869,  # 6214
+2839, 655,3811,3812,3094,3989,3000,3813,1310,3569,4477,7744,7745,7746,1733, 558,  # 6230
+4478,3681, 335,1549,3045,1756,4192,3682,1945,3464,1829,1291,1192, 470,2726,2107,  # 6246
+2793, 913,1054,3990,7747,1027,7748,3046,3991,4479, 982,2662,3362,3148,3465,3216,  # 6262
+3217,1946,2794,7749, 571,4480,7750,1830,7751,3570,2583,1523,2424,7752,2089, 984,  # 6278
+4481,3683,1959,7753,3684, 852, 923,2795,3466,3685, 969,1519, 999,2048,2320,1705,  # 6294
+7754,3095, 615,1662, 151, 597,3992,2405,2321,1049, 275,4482,3686,4193, 568,3687,  # 6310
+3571,2480,4194,3688,7755,2425,2270, 409,3218,7756,1566,2874,3467,1002, 769,2840,  # 6326
+ 194,2090,3149,3689,2222,3294,4195, 628,1505,7757,7758,1763,2177,3001,3993, 521,  # 6342
+1161,2584,1787,2203,2406,4483,3994,1625,4196,4197, 412,  42,3096, 464,7759,2632,  # 6358
+4484,3363,1760,1571,2875,3468,2530,1219,2204,3814,2633,2140,2368,4485,4486,3295,  # 6374
+1651,3364,3572,7760,7761,3573,2481,3469,7762,3690,7763,7764,2271,2091, 460,7765,  # 6390
+4487,7766,3002, 962, 588,3574, 289,3219,2634,1116,  52,7767,3047,1796,7768,7769,  # 6406
+7770,1467,7771,1598,1143,3691,4198,1984,1734,1067,4488,1280,3365, 465,4489,1572,  # 6422
+ 510,7772,1927,2241,1812,1644,3575,7773,4490,3692,7774,7775,2663,1573,1534,7776,  # 6438
+7777,4199, 536,1807,1761,3470,3815,3150,2635,7778,7779,7780,4491,3471,2915,1911,  # 6454
+2796,7781,3296,1122, 377,3220,7782, 360,7783,7784,4200,1529, 551,7785,2059,3693,  # 6470
+1769,2426,7786,2916,4201,3297,3097,2322,2108,2030,4492,1404, 136,1468,1479, 672,  # 6486
+1171,3221,2303, 271,3151,7787,2762,7788,2049, 678,2727, 865,1947,4493,7789,2013,  # 6502
+3995,2956,7790,2728,2223,1397,3048,3694,4494,4495,1735,2917,3366,3576,7791,3816,  # 6518
+ 509,2841,2453,2876,3817,7792,7793,3152,3153,4496,4202,2531,4497,2304,1166,1010,  # 6534
+ 552, 681,1887,7794,7795,2957,2958,3996,1287,1596,1861,3154, 358, 453, 736, 175,  # 6550
+ 478,1117, 905,1167,1097,7796,1853,1530,7797,1706,7798,2178,3472,2287,3695,3473,  # 6566
+3577,4203,2092,4204,7799,3367,1193,2482,4205,1458,2190,2205,1862,1888,1421,3298,  # 6582
+2918,3049,2179,3474, 595,2122,7800,3997,7801,7802,4206,1707,2636, 223,3696,1359,  # 6598
+ 751,3098, 183,3475,7803,2797,3003, 419,2369, 633, 704,3818,2389, 241,7804,7805,  # 6614
+7806, 838,3004,3697,2272,2763,2454,3819,1938,2050,3998,1309,3099,2242,1181,7807,  # 6630
+1136,2206,3820,2370,1446,4207,2305,4498,7808,7809,4208,1055,2605, 484,3698,7810,  # 6646
+3999, 625,4209,2273,3368,1499,4210,4000,7811,4001,4211,3222,2274,2275,3476,7812,  # 6662
+7813,2764, 808,2606,3699,3369,4002,4212,3100,2532, 526,3370,3821,4213, 955,7814,  # 6678
+1620,4214,2637,2427,7815,1429,3700,1669,1831, 994, 928,7816,3578,1260,7817,7818,  # 6694
+7819,1948,2288, 741,2919,1626,4215,2729,2455, 867,1184, 362,3371,1392,7820,7821,  # 6710
+4003,4216,1770,1736,3223,2920,4499,4500,1928,2698,1459,1158,7822,3050,3372,2877,  # 6726
+1292,1929,2506,2842,3701,1985,1187,2071,2014,2607,4217,7823,2566,2507,2169,3702,  # 6742
+2483,3299,7824,3703,4501,7825,7826, 666,1003,3005,1022,3579,4218,7827,4502,1813,  # 6758
+2253, 574,3822,1603, 295,1535, 705,3823,4219, 283, 858, 417,7828,7829,3224,4503,  # 6774
+4504,3051,1220,1889,1046,2276,2456,4004,1393,1599, 689,2567, 388,4220,7830,2484,  # 6790
+ 802,7831,2798,3824,2060,1405,2254,7832,4505,3825,2109,1052,1345,3225,1585,7833,  # 6806
+ 809,7834,7835,7836, 575,2730,3477, 956,1552,1469,1144,2323,7837,2324,1560,2457,  # 6822
+3580,3226,4005, 616,2207,3155,2180,2289,7838,1832,7839,3478,4506,7840,1319,3704,  # 6838
+3705,1211,3581,1023,3227,1293,2799,7841,7842,7843,3826, 607,2306,3827, 762,2878,  # 6854
+1439,4221,1360,7844,1485,3052,7845,4507,1038,4222,1450,2061,2638,4223,1379,4508,  # 6870
+2585,7846,7847,4224,1352,1414,2325,2921,1172,7848,7849,3828,3829,7850,1797,1451,  # 6886
+7851,7852,7853,7854,2922,4006,4007,2485,2346, 411,4008,4009,3582,3300,3101,4509,  # 6902
+1561,2664,1452,4010,1375,7855,7856,  47,2959, 316,7857,1406,1591,2923,3156,7858,  # 6918
+1025,2141,3102,3157, 354,2731, 884,2224,4225,2407, 508,3706, 726,3583, 996,2428,  # 6934
+3584, 729,7859, 392,2191,1453,4011,4510,3707,7860,7861,2458,3585,2608,1675,2800,  # 6950
+ 919,2347,2960,2348,1270,4511,4012,  73,7862,7863, 647,7864,3228,2843,2255,1550,  # 6966
+1346,3006,7865,1332, 883,3479,7866,7867,7868,7869,3301,2765,7870,1212, 831,1347,  # 6982
+4226,4512,2326,3830,1863,3053, 720,3831,4513,4514,3832,7871,4227,7872,7873,4515,  # 6998
+7874,7875,1798,4516,3708,2609,4517,3586,1645,2371,7876,7877,2924, 669,2208,2665,  # 7014
+2429,7878,2879,7879,7880,1028,3229,7881,4228,2408,7882,2256,1353,7883,7884,4518,  # 7030
+3158, 518,7885,4013,7886,4229,1960,7887,2142,4230,7888,7889,3007,2349,2350,3833,  # 7046
+ 516,1833,1454,4014,2699,4231,4519,2225,2610,1971,1129,3587,7890,2766,7891,2961,  # 7062
+1422, 577,1470,3008,1524,3373,7892,7893, 432,4232,3054,3480,7894,2586,1455,2508,  # 7078
+2226,1972,1175,7895,1020,2732,4015,3481,4520,7896,2733,7897,1743,1361,3055,3482,  # 7094
+2639,4016,4233,4521,2290, 895, 924,4234,2170, 331,2243,3056, 166,1627,3057,1098,  # 7110
+7898,1232,2880,2227,3374,4522, 657, 403,1196,2372, 542,3709,3375,1600,4235,3483,  # 7126
+7899,4523,2767,3230, 576, 530,1362,7900,4524,2533,2666,3710,4017,7901, 842,3834,  # 7142
+7902,2801,2031,1014,4018, 213,2700,3376, 665, 621,4236,7903,3711,2925,2430,7904,  # 7158
+2431,3302,3588,3377,7905,4237,2534,4238,4525,3589,1682,4239,3484,1380,7906, 724,  # 7174
+2277, 600,1670,7907,1337,1233,4526,3103,2244,7908,1621,4527,7909, 651,4240,7910,  # 7190
+1612,4241,2611,7911,2844,7912,2734,2307,3058,7913, 716,2459,3059, 174,1255,2701,  # 7206
+4019,3590, 548,1320,1398, 728,4020,1574,7914,1890,1197,3060,4021,7915,3061,3062,  # 7222
+3712,3591,3713, 747,7916, 635,4242,4528,7917,7918,7919,4243,7920,7921,4529,7922,  # 7238
+3378,4530,2432, 451,7923,3714,2535,2072,4244,2735,4245,4022,7924,1764,4531,7925,  # 7254
+4246, 350,7926,2278,2390,2486,7927,4247,4023,2245,1434,4024, 488,4532, 458,4248,  # 7270
+4025,3715, 771,1330,2391,3835,2568,3159,2159,2409,1553,2667,3160,4249,7928,2487,  # 7286
+2881,2612,1720,2702,4250,3379,4533,7929,2536,4251,7930,3231,4252,2768,7931,2015,  # 7302
+2736,7932,1155,1017,3716,3836,7933,3303,2308, 201,1864,4253,1430,7934,4026,7935,  # 7318
+7936,7937,7938,7939,4254,1604,7940, 414,1865, 371,2587,4534,4535,3485,2016,3104,  # 7334
+4536,1708, 960,4255, 887, 389,2171,1536,1663,1721,7941,2228,4027,2351,2926,1580,  # 7350
+7942,7943,7944,1744,7945,2537,4537,4538,7946,4539,7947,2073,7948,7949,3592,3380,  # 7366
+2882,4256,7950,4257,2640,3381,2802, 673,2703,2460, 709,3486,4028,3593,4258,7951,  # 7382
+1148, 502, 634,7952,7953,1204,4540,3594,1575,4541,2613,3717,7954,3718,3105, 948,  # 7398
+3232, 121,1745,3837,1110,7955,4259,3063,2509,3009,4029,3719,1151,1771,3838,1488,  # 7414
+4030,1986,7956,2433,3487,7957,7958,2093,7959,4260,3839,1213,1407,2803, 531,2737,  # 7430
+2538,3233,1011,1537,7960,2769,4261,3106,1061,7961,3720,3721,1866,2883,7962,2017,  # 7446
+ 120,4262,4263,2062,3595,3234,2309,3840,2668,3382,1954,4542,7963,7964,3488,1047,  # 7462
+2704,1266,7965,1368,4543,2845, 649,3383,3841,2539,2738,1102,2846,2669,7966,7967,  # 7478
+1999,7968,1111,3596,2962,7969,2488,3842,3597,2804,1854,3384,3722,7970,7971,3385,  # 7494
+2410,2884,3304,3235,3598,7972,2569,7973,3599,2805,4031,1460, 856,7974,3600,7975,  # 7510
+2885,2963,7976,2886,3843,7977,4264, 632,2510, 875,3844,1697,3845,2291,7978,7979,  # 7526
+4544,3010,1239, 580,4545,4265,7980, 914, 936,2074,1190,4032,1039,2123,7981,7982,  # 7542
+7983,3386,1473,7984,1354,4266,3846,7985,2172,3064,4033, 915,3305,4267,4268,3306,  # 7558
+1605,1834,7986,2739, 398,3601,4269,3847,4034, 328,1912,2847,4035,3848,1331,4270,  # 7574
+3011, 937,4271,7987,3602,4036,4037,3387,2160,4546,3388, 524, 742, 538,3065,1012,  # 7590
+7988,7989,3849,2461,7990, 658,1103, 225,3850,7991,7992,4547,7993,4548,7994,3236,  # 7606
+1243,7995,4038, 963,2246,4549,7996,2705,3603,3161,7997,7998,2588,2327,7999,4550,  # 7622
+8000,8001,8002,3489,3307, 957,3389,2540,2032,1930,2927,2462, 870,2018,3604,1746,  # 7638
+2770,2771,2434,2463,8003,3851,8004,3723,3107,3724,3490,3390,3725,8005,1179,3066,  # 7654
+8006,3162,2373,4272,3726,2541,3163,3108,2740,4039,8007,3391,1556,2542,2292, 977,  # 7670
+2887,2033,4040,1205,3392,8008,1765,3393,3164,2124,1271,1689, 714,4551,3491,8009,  # 7686
+2328,3852, 533,4273,3605,2181, 617,8010,2464,3308,3492,2310,8011,8012,3165,8013,  # 7702
+8014,3853,1987, 618, 427,2641,3493,3394,8015,8016,1244,1690,8017,2806,4274,4552,  # 7718
+8018,3494,8019,8020,2279,1576, 473,3606,4275,3395, 972,8021,3607,8022,3067,8023,  # 7734
+8024,4553,4554,8025,3727,4041,4042,8026, 153,4555, 356,8027,1891,2888,4276,2143,  # 7750
+ 408, 803,2352,8028,3854,8029,4277,1646,2570,2511,4556,4557,3855,8030,3856,4278,  # 7766
+8031,2411,3396, 752,8032,8033,1961,2964,8034, 746,3012,2465,8035,4279,3728, 698,  # 7782
+4558,1892,4280,3608,2543,4559,3609,3857,8036,3166,3397,8037,1823,1302,4043,2706,  # 7798
+3858,1973,4281,8038,4282,3167, 823,1303,1288,1236,2848,3495,4044,3398, 774,3859,  # 7814
+8039,1581,4560,1304,2849,3860,4561,8040,2435,2161,1083,3237,4283,4045,4284, 344,  # 7830
+1173, 288,2311, 454,1683,8041,8042,1461,4562,4046,2589,8043,8044,4563, 985, 894,  # 7846
+8045,3399,3168,8046,1913,2928,3729,1988,8047,2110,1974,8048,4047,8049,2571,1194,  # 7862
+ 425,8050,4564,3169,1245,3730,4285,8051,8052,2850,8053, 636,4565,1855,3861, 760,  # 7878
+1799,8054,4286,2209,1508,4566,4048,1893,1684,2293,8055,8056,8057,4287,4288,2210,  # 7894
+ 479,8058,8059, 832,8060,4049,2489,8061,2965,2490,3731, 990,3109, 627,1814,2642,  # 7910
+4289,1582,4290,2125,2111,3496,4567,8062, 799,4291,3170,8063,4568,2112,1737,3013,  # 7926
+1018, 543, 754,4292,3309,1676,4569,4570,4050,8064,1489,8065,3497,8066,2614,2889,  # 7942
+4051,8067,8068,2966,8069,8070,8071,8072,3171,4571,4572,2182,1722,8073,3238,3239,  # 7958
+1842,3610,1715, 481, 365,1975,1856,8074,8075,1962,2491,4573,8076,2126,3611,3240,  # 7974
+ 433,1894,2063,2075,8077, 602,2741,8078,8079,8080,8081,8082,3014,1628,3400,8083,  # 7990
+3172,4574,4052,2890,4575,2512,8084,2544,2772,8085,8086,8087,3310,4576,2891,8088,  # 8006
+4577,8089,2851,4578,4579,1221,2967,4053,2513,8090,8091,8092,1867,1989,8093,8094,  # 8022
+8095,1895,8096,8097,4580,1896,4054, 318,8098,2094,4055,4293,8099,8100, 485,8101,  # 8038
+ 938,3862, 553,2670, 116,8102,3863,3612,8103,3498,2671,2773,3401,3311,2807,8104,  # 8054
+3613,2929,4056,1747,2930,2968,8105,8106, 207,8107,8108,2672,4581,2514,8109,3015,  # 8070
+ 890,3614,3864,8110,1877,3732,3402,8111,2183,2353,3403,1652,8112,8113,8114, 941,  # 8086
+2294, 208,3499,4057,2019, 330,4294,3865,2892,2492,3733,4295,8115,8116,8117,8118,  # 8102
+)
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwprober.py
new file mode 100644
index 00000000..35669cc4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/euctwprober.py
@@ -0,0 +1,46 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCTWDistributionAnalysis
+from .mbcssm import EUCTW_SM_MODEL
+
+class EUCTWProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCTWProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCTW_SM_MODEL)
+        self.distribution_analyzer = EUCTWDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-TW"
+
+    @property
+    def language(self):
+        return "Taiwan"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312freq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312freq.py
new file mode 100644
index 00000000..697837bd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312freq.py
@@ -0,0 +1,283 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# GB2312 most frequently used character table
+#
+# Char to FreqOrder table , from hz6763
+
+# 512  --> 0.79  -- 0.79
+# 1024 --> 0.92  -- 0.13
+# 2048 --> 0.98  -- 0.06
+# 6768 --> 1.00  -- 0.02
+#
+# Ideal Distribution Ratio = 0.79135/(1-0.79135) = 3.79
+# Random Distribution Ration = 512 / (3755 - 512) = 0.157
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher that RDR
+
+GB2312_TYPICAL_DISTRIBUTION_RATIO = 0.9
+
+GB2312_TABLE_SIZE = 3760
+
+GB2312_CHAR_TO_FREQ_ORDER = (
+1671, 749,1443,2364,3924,3807,2330,3921,1704,3463,2691,1511,1515, 572,3191,2205,
+2361, 224,2558, 479,1711, 963,3162, 440,4060,1905,2966,2947,3580,2647,3961,3842,
+2204, 869,4207, 970,2678,5626,2944,2956,1479,4048, 514,3595, 588,1346,2820,3409,
+ 249,4088,1746,1873,2047,1774, 581,1813, 358,1174,3590,1014,1561,4844,2245, 670,
+1636,3112, 889,1286, 953, 556,2327,3060,1290,3141, 613, 185,3477,1367, 850,3820,
+1715,2428,2642,2303,2732,3041,2562,2648,3566,3946,1349, 388,3098,2091,1360,3585,
+ 152,1687,1539, 738,1559,  59,1232,2925,2267,1388,1249,1741,1679,2960, 151,1566,
+1125,1352,4271, 924,4296, 385,3166,4459, 310,1245,2850,  70,3285,2729,3534,3575,
+2398,3298,3466,1960,2265, 217,3647, 864,1909,2084,4401,2773,1010,3269,5152, 853,
+3051,3121,1244,4251,1895, 364,1499,1540,2313,1180,3655,2268, 562, 715,2417,3061,
+ 544, 336,3768,2380,1752,4075, 950, 280,2425,4382, 183,2759,3272, 333,4297,2155,
+1688,2356,1444,1039,4540, 736,1177,3349,2443,2368,2144,2225, 565, 196,1482,3406,
+ 927,1335,4147, 692, 878,1311,1653,3911,3622,1378,4200,1840,2969,3149,2126,1816,
+2534,1546,2393,2760, 737,2494,  13, 447, 245,2747,  38,2765,2129,2589,1079, 606,
+ 360, 471,3755,2890, 404, 848, 699,1785,1236, 370,2221,1023,3746,2074,2026,2023,
+2388,1581,2119, 812,1141,3091,2536,1519, 804,2053, 406,1596,1090, 784, 548,4414,
+1806,2264,2936,1100, 343,4114,5096, 622,3358, 743,3668,1510,1626,5020,3567,2513,
+3195,4115,5627,2489,2991,  24,2065,2697,1087,2719,  48,1634, 315,  68, 985,2052,
+ 198,2239,1347,1107,1439, 597,2366,2172, 871,3307, 919,2487,2790,1867, 236,2570,
+1413,3794, 906,3365,3381,1701,1982,1818,1524,2924,1205, 616,2586,2072,2004, 575,
+ 253,3099,  32,1365,1182, 197,1714,2454,1201, 554,3388,3224,2748, 756,2587, 250,
+2567,1507,1517,3529,1922,2761,2337,3416,1961,1677,2452,2238,3153, 615, 911,1506,
+1474,2495,1265,1906,2749,3756,3280,2161, 898,2714,1759,3450,2243,2444, 563,  26,
+3286,2266,3769,3344,2707,3677, 611,1402, 531,1028,2871,4548,1375, 261,2948, 835,
+1190,4134, 353, 840,2684,1900,3082,1435,2109,1207,1674, 329,1872,2781,4055,2686,
+2104, 608,3318,2423,2957,2768,1108,3739,3512,3271,3985,2203,1771,3520,1418,2054,
+1681,1153, 225,1627,2929, 162,2050,2511,3687,1954, 124,1859,2431,1684,3032,2894,
+ 585,4805,3969,2869,2704,2088,2032,2095,3656,2635,4362,2209, 256, 518,2042,2105,
+3777,3657, 643,2298,1148,1779, 190, 989,3544, 414,  11,2135,2063,2979,1471, 403,
+3678, 126, 770,1563, 671,2499,3216,2877, 600,1179, 307,2805,4937,1268,1297,2694,
+ 252,4032,1448,1494,1331,1394, 127,2256, 222,1647,1035,1481,3056,1915,1048, 873,
+3651, 210,  33,1608,2516, 200,1520, 415, 102,   0,3389,1287, 817,  91,3299,2940,
+ 836,1814, 549,2197,1396,1669,2987,3582,2297,2848,4528,1070, 687,  20,1819, 121,
+1552,1364,1461,1968,2617,3540,2824,2083, 177, 948,4938,2291, 110,4549,2066, 648,
+3359,1755,2110,2114,4642,4845,1693,3937,3308,1257,1869,2123, 208,1804,3159,2992,
+2531,2549,3361,2418,1350,2347,2800,2568,1291,2036,2680,  72, 842,1990, 212,1233,
+1154,1586,  75,2027,3410,4900,1823,1337,2710,2676, 728,2810,1522,3026,4995, 157,
+ 755,1050,4022, 710, 785,1936,2194,2085,1406,2777,2400, 150,1250,4049,1206, 807,
+1910, 534, 529,3309,1721,1660, 274,  39,2827, 661,2670,1578, 925,3248,3815,1094,
+4278,4901,4252,  41,1150,3747,2572,2227,4501,3658,4902,3813,3357,3617,2884,2258,
+ 887, 538,4187,3199,1294,2439,3042,2329,2343,2497,1255, 107, 543,1527, 521,3478,
+3568, 194,5062,  15, 961,3870,1241,1192,2664,  66,5215,3260,2111,1295,1127,2152,
+3805,4135, 901,1164,1976, 398,1278, 530,1460, 748, 904,1054,1966,1426,  53,2909,
+ 509, 523,2279,1534, 536,1019, 239,1685, 460,2353, 673,1065,2401,3600,4298,2272,
+1272,2363, 284,1753,3679,4064,1695,  81, 815,2677,2757,2731,1386, 859, 500,4221,
+2190,2566, 757,1006,2519,2068,1166,1455, 337,2654,3203,1863,1682,1914,3025,1252,
+1409,1366, 847, 714,2834,2038,3209, 964,2970,1901, 885,2553,1078,1756,3049, 301,
+1572,3326, 688,2130,1996,2429,1805,1648,2930,3421,2750,3652,3088, 262,1158,1254,
+ 389,1641,1812, 526,1719, 923,2073,1073,1902, 468, 489,4625,1140, 857,2375,3070,
+3319,2863, 380, 116,1328,2693,1161,2244, 273,1212,1884,2769,3011,1775,1142, 461,
+3066,1200,2147,2212, 790, 702,2695,4222,1601,1058, 434,2338,5153,3640,  67,2360,
+4099,2502, 618,3472,1329, 416,1132, 830,2782,1807,2653,3211,3510,1662, 192,2124,
+ 296,3979,1739,1611,3684,  23, 118, 324, 446,1239,1225, 293,2520,3814,3795,2535,
+3116,  17,1074, 467,2692,2201, 387,2922,  45,1326,3055,1645,3659,2817, 958, 243,
+1903,2320,1339,2825,1784,3289, 356, 576, 865,2315,2381,3377,3916,1088,3122,1713,
+1655, 935, 628,4689,1034,1327, 441, 800, 720, 894,1979,2183,1528,5289,2702,1071,
+4046,3572,2399,1571,3281,  79, 761,1103, 327, 134, 758,1899,1371,1615, 879, 442,
+ 215,2605,2579, 173,2048,2485,1057,2975,3317,1097,2253,3801,4263,1403,1650,2946,
+ 814,4968,3487,1548,2644,1567,1285,   2, 295,2636,  97, 946,3576, 832, 141,4257,
+3273, 760,3821,3521,3156,2607, 949,1024,1733,1516,1803,1920,2125,2283,2665,3180,
+1501,2064,3560,2171,1592, 803,3518,1416, 732,3897,4258,1363,1362,2458, 119,1427,
+ 602,1525,2608,1605,1639,3175, 694,3064,  10, 465,  76,2000,4846,4208, 444,3781,
+1619,3353,2206,1273,3796, 740,2483, 320,1723,2377,3660,2619,1359,1137,1762,1724,
+2345,2842,1850,1862, 912, 821,1866, 612,2625,1735,2573,3369,1093, 844,  89, 937,
+ 930,1424,3564,2413,2972,1004,3046,3019,2011, 711,3171,1452,4178, 428, 801,1943,
+ 432, 445,2811, 206,4136,1472, 730, 349,  73, 397,2802,2547, 998,1637,1167, 789,
+ 396,3217, 154,1218, 716,1120,1780,2819,4826,1931,3334,3762,2139,1215,2627, 552,
+3664,3628,3232,1405,2383,3111,1356,2652,3577,3320,3101,1703, 640,1045,1370,1246,
+4996, 371,1575,2436,1621,2210, 984,4033,1734,2638,  16,4529, 663,2755,3255,1451,
+3917,2257,1253,1955,2234,1263,2951, 214,1229, 617, 485, 359,1831,1969, 473,2310,
+ 750,2058, 165,  80,2864,2419, 361,4344,2416,2479,1134, 796,3726,1266,2943, 860,
+2715, 938, 390,2734,1313,1384, 248, 202, 877,1064,2854, 522,3907, 279,1602, 297,
+2357, 395,3740, 137,2075, 944,4089,2584,1267,3802,  62,1533,2285, 178, 176, 780,
+2440, 201,3707, 590, 478,1560,4354,2117,1075,  30,  74,4643,4004,1635,1441,2745,
+ 776,2596, 238,1077,1692,1912,2844, 605, 499,1742,3947, 241,3053, 980,1749, 936,
+2640,4511,2582, 515,1543,2162,5322,2892,2993, 890,2148,1924, 665,1827,3581,1032,
+ 968,3163, 339,1044,1896, 270, 583,1791,1720,4367,1194,3488,3669,  43,2523,1657,
+ 163,2167, 290,1209,1622,3378, 550, 634,2508,2510, 695,2634,2384,2512,1476,1414,
+ 220,1469,2341,2138,2852,3183,2900,4939,2865,3502,1211,3680, 854,3227,1299,2976,
+3172, 186,2998,1459, 443,1067,3251,1495, 321,1932,3054, 909, 753,1410,1828, 436,
+2441,1119,1587,3164,2186,1258, 227, 231,1425,1890,3200,3942, 247, 959, 725,5254,
+2741, 577,2158,2079, 929, 120, 174, 838,2813, 591,1115, 417,2024,  40,3240,1536,
+1037, 291,4151,2354, 632,1298,2406,2500,3535,1825,1846,3451, 205,1171, 345,4238,
+  18,1163, 811, 685,2208,1217, 425,1312,1508,1175,4308,2552,1033, 587,1381,3059,
+2984,3482, 340,1316,4023,3972, 792,3176, 519, 777,4690, 918, 933,4130,2981,3741,
+  90,3360,2911,2200,5184,4550, 609,3079,2030, 272,3379,2736, 363,3881,1130,1447,
+ 286, 779, 357,1169,3350,3137,1630,1220,2687,2391, 747,1277,3688,2618,2682,2601,
+1156,3196,5290,4034,3102,1689,3596,3128, 874, 219,2783, 798, 508,1843,2461, 269,
+1658,1776,1392,1913,2983,3287,2866,2159,2372, 829,4076,  46,4253,2873,1889,1894,
+ 915,1834,1631,2181,2318, 298, 664,2818,3555,2735, 954,3228,3117, 527,3511,2173,
+ 681,2712,3033,2247,2346,3467,1652, 155,2164,3382, 113,1994, 450, 899, 494, 994,
+1237,2958,1875,2336,1926,3727, 545,1577,1550, 633,3473, 204,1305,3072,2410,1956,
+2471, 707,2134, 841,2195,2196,2663,3843,1026,4940, 990,3252,4997, 368,1092, 437,
+3212,3258,1933,1829, 675,2977,2893, 412, 943,3723,4644,3294,3283,2230,2373,5154,
+2389,2241,2661,2323,1404,2524, 593, 787, 677,3008,1275,2059, 438,2709,2609,2240,
+2269,2246,1446,  36,1568,1373,3892,1574,2301,1456,3962, 693,2276,5216,2035,1143,
+2720,1919,1797,1811,2763,4137,2597,1830,1699,1488,1198,2090, 424,1694, 312,3634,
+3390,4179,3335,2252,1214, 561,1059,3243,2295,2561, 975,5155,2321,2751,3772, 472,
+1537,3282,3398,1047,2077,2348,2878,1323,3340,3076, 690,2906,  51, 369, 170,3541,
+1060,2187,2688,3670,2541,1083,1683, 928,3918, 459, 109,4427, 599,3744,4286, 143,
+2101,2730,2490,  82,1588,3036,2121, 281,1860, 477,4035,1238,2812,3020,2716,3312,
+1530,2188,2055,1317, 843, 636,1808,1173,3495, 649, 181,1002, 147,3641,1159,2414,
+3750,2289,2795, 813,3123,2610,1136,4368,   5,3391,4541,2174, 420, 429,1728, 754,
+1228,2115,2219, 347,2223,2733, 735,1518,3003,2355,3134,1764,3948,3329,1888,2424,
+1001,1234,1972,3321,3363,1672,1021,1450,1584, 226, 765, 655,2526,3404,3244,2302,
+3665, 731, 594,2184, 319,1576, 621, 658,2656,4299,2099,3864,1279,2071,2598,2739,
+ 795,3086,3699,3908,1707,2352,2402,1382,3136,2475,1465,4847,3496,3865,1085,3004,
+2591,1084, 213,2287,1963,3565,2250, 822, 793,4574,3187,1772,1789,3050, 595,1484,
+1959,2770,1080,2650, 456, 422,2996, 940,3322,4328,4345,3092,2742, 965,2784, 739,
+4124, 952,1358,2498,2949,2565, 332,2698,2378, 660,2260,2473,4194,3856,2919, 535,
+1260,2651,1208,1428,1300,1949,1303,2942, 433,2455,2450,1251,1946, 614,1269, 641,
+1306,1810,2737,3078,2912, 564,2365,1419,1415,1497,4460,2367,2185,1379,3005,1307,
+3218,2175,1897,3063, 682,1157,4040,4005,1712,1160,1941,1399, 394, 402,2952,1573,
+1151,2986,2404, 862, 299,2033,1489,3006, 346, 171,2886,3401,1726,2932, 168,2533,
+  47,2507,1030,3735,1145,3370,1395,1318,1579,3609,4560,2857,4116,1457,2529,1965,
+ 504,1036,2690,2988,2405, 745,5871, 849,2397,2056,3081, 863,2359,3857,2096,  99,
+1397,1769,2300,4428,1643,3455,1978,1757,3718,1440,  35,4879,3742,1296,4228,2280,
+ 160,5063,1599,2013, 166, 520,3479,1646,3345,3012, 490,1937,1545,1264,2182,2505,
+1096,1188,1369,1436,2421,1667,2792,2460,1270,2122, 727,3167,2143, 806,1706,1012,
+1800,3037, 960,2218,1882, 805, 139,2456,1139,1521, 851,1052,3093,3089, 342,2039,
+ 744,5097,1468,1502,1585,2087, 223, 939, 326,2140,2577, 892,2481,1623,4077, 982,
+3708, 135,2131,  87,2503,3114,2326,1106, 876,1616, 547,2997,2831,2093,3441,4530,
+4314,   9,3256,4229,4148, 659,1462,1986,1710,2046,2913,2231,4090,4880,5255,3392,
+3274,1368,3689,4645,1477, 705,3384,3635,1068,1529,2941,1458,3782,1509, 100,1656,
+2548, 718,2339, 408,1590,2780,3548,1838,4117,3719,1345,3530, 717,3442,2778,3220,
+2898,1892,4590,3614,3371,2043,1998,1224,3483, 891, 635, 584,2559,3355, 733,1766,
+1729,1172,3789,1891,2307, 781,2982,2271,1957,1580,5773,2633,2005,4195,3097,1535,
+3213,1189,1934,5693,3262, 586,3118,1324,1598, 517,1564,2217,1868,1893,4445,3728,
+2703,3139,1526,1787,1992,3882,2875,1549,1199,1056,2224,1904,2711,5098,4287, 338,
+1993,3129,3489,2689,1809,2815,1997, 957,1855,3898,2550,3275,3057,1105,1319, 627,
+1505,1911,1883,3526, 698,3629,3456,1833,1431, 746,  77,1261,2017,2296,1977,1885,
+ 125,1334,1600, 525,1798,1109,2222,1470,1945, 559,2236,1186,3443,2476,1929,1411,
+2411,3135,1777,3372,2621,1841,1613,3229, 668,1430,1839,2643,2916, 195,1989,2671,
+2358,1387, 629,3205,2293,5256,4439, 123,1310, 888,1879,4300,3021,3605,1003,1162,
+3192,2910,2010, 140,2395,2859,  55,1082,2012,2901, 662, 419,2081,1438, 680,2774,
+4654,3912,1620,1731,1625,5035,4065,2328, 512,1344, 802,5443,2163,2311,2537, 524,
+3399,  98,1155,2103,1918,2606,3925,2816,1393,2465,1504,3773,2177,3963,1478,4346,
+ 180,1113,4655,3461,2028,1698, 833,2696,1235,1322,1594,4408,3623,3013,3225,2040,
+3022, 541,2881, 607,3632,2029,1665,1219, 639,1385,1686,1099,2803,3231,1938,3188,
+2858, 427, 676,2772,1168,2025, 454,3253,2486,3556, 230,1950, 580, 791,1991,1280,
+1086,1974,2034, 630, 257,3338,2788,4903,1017,  86,4790, 966,2789,1995,1696,1131,
+ 259,3095,4188,1308, 179,1463,5257, 289,4107,1248,  42,3413,1725,2288, 896,1947,
+ 774,4474,4254, 604,3430,4264, 392,2514,2588, 452, 237,1408,3018, 988,4531,1970,
+3034,3310, 540,2370,1562,1288,2990, 502,4765,1147,   4,1853,2708, 207, 294,2814,
+4078,2902,2509, 684,  34,3105,3532,2551, 644, 709,2801,2344, 573,1727,3573,3557,
+2021,1081,3100,4315,2100,3681, 199,2263,1837,2385, 146,3484,1195,2776,3949, 997,
+1939,3973,1008,1091,1202,1962,1847,1149,4209,5444,1076, 493, 117,5400,2521, 972,
+1490,2934,1796,4542,2374,1512,2933,2657, 413,2888,1135,2762,2314,2156,1355,2369,
+ 766,2007,2527,2170,3124,2491,2593,2632,4757,2437, 234,3125,3591,1898,1750,1376,
+1942,3468,3138, 570,2127,2145,3276,4131, 962, 132,1445,4196,  19, 941,3624,3480,
+3366,1973,1374,4461,3431,2629, 283,2415,2275, 808,2887,3620,2112,2563,1353,3610,
+ 955,1089,3103,1053,  96,  88,4097, 823,3808,1583, 399, 292,4091,3313, 421,1128,
+ 642,4006, 903,2539,1877,2082, 596,  29,4066,1790, 722,2157, 130, 995,1569, 769,
+1485, 464, 513,2213, 288,1923,1101,2453,4316, 133, 486,2445,  50, 625, 487,2207,
+  57, 423, 481,2962, 159,3729,1558, 491, 303, 482, 501, 240,2837, 112,3648,2392,
+1783, 362,   8,3433,3422, 610,2793,3277,1390,1284,1654,  21,3823, 734, 367, 623,
+ 193, 287, 374,1009,1483, 816, 476, 313,2255,2340,1262,2150,2899,1146,2581, 782,
+2116,1659,2018,1880, 255,3586,3314,1110,2867,2137,2564, 986,2767,5185,2006, 650,
+ 158, 926, 762, 881,3157,2717,2362,3587, 306,3690,3245,1542,3077,2427,1691,2478,
+2118,2985,3490,2438, 539,2305, 983, 129,1754, 355,4201,2386, 827,2923, 104,1773,
+2838,2771, 411,2905,3919, 376, 767, 122,1114, 828,2422,1817,3506, 266,3460,1007,
+1609,4998, 945,2612,4429,2274, 726,1247,1964,2914,2199,2070,4002,4108, 657,3323,
+1422, 579, 455,2764,4737,1222,2895,1670, 824,1223,1487,2525, 558, 861,3080, 598,
+2659,2515,1967, 752,2583,2376,2214,4180, 977, 704,2464,4999,2622,4109,1210,2961,
+ 819,1541, 142,2284,  44, 418, 457,1126,3730,4347,4626,1644,1876,3671,1864, 302,
+1063,5694, 624, 723,1984,3745,1314,1676,2488,1610,1449,3558,3569,2166,2098, 409,
+1011,2325,3704,2306, 818,1732,1383,1824,1844,3757, 999,2705,3497,1216,1423,2683,
+2426,2954,2501,2726,2229,1475,2554,5064,1971,1794,1666,2014,1343, 783, 724, 191,
+2434,1354,2220,5065,1763,2752,2472,4152, 131, 175,2885,3434,  92,1466,4920,2616,
+3871,3872,3866, 128,1551,1632, 669,1854,3682,4691,4125,1230, 188,2973,3290,1302,
+1213, 560,3266, 917, 763,3909,3249,1760, 868,1958, 764,1782,2097, 145,2277,3774,
+4462,  64,1491,3062, 971,2132,3606,2442, 221,1226,1617, 218, 323,1185,3207,3147,
+ 571, 619,1473,1005,1744,2281, 449,1887,2396,3685, 275, 375,3816,1743,3844,3731,
+ 845,1983,2350,4210,1377, 773, 967,3499,3052,3743,2725,4007,1697,1022,3943,1464,
+3264,2855,2722,1952,1029,2839,2467,  84,4383,2215, 820,1391,2015,2448,3672, 377,
+1948,2168, 797,2545,3536,2578,2645,  94,2874,1678, 405,1259,3071, 771, 546,1315,
+ 470,1243,3083, 895,2468, 981, 969,2037, 846,4181, 653,1276,2928,  14,2594, 557,
+3007,2474, 156, 902,1338,1740,2574, 537,2518, 973,2282,2216,2433,1928, 138,2903,
+1293,2631,1612, 646,3457, 839,2935, 111, 496,2191,2847, 589,3186, 149,3994,2060,
+4031,2641,4067,3145,1870,  37,3597,2136,1025,2051,3009,3383,3549,1121,1016,3261,
+1301, 251,2446,2599,2153, 872,3246, 637, 334,3705, 831, 884, 921,3065,3140,4092,
+2198,1944, 246,2964, 108,2045,1152,1921,2308,1031, 203,3173,4170,1907,3890, 810,
+1401,2003,1690, 506, 647,1242,2828,1761,1649,3208,2249,1589,3709,2931,5156,1708,
+ 498, 666,2613, 834,3817,1231, 184,2851,1124, 883,3197,2261,3710,1765,1553,2658,
+1178,2639,2351,  93,1193, 942,2538,2141,4402, 235,1821, 870,1591,2192,1709,1871,
+3341,1618,4126,2595,2334, 603, 651,  69, 701, 268,2662,3411,2555,1380,1606, 503,
+ 448, 254,2371,2646, 574,1187,2309,1770, 322,2235,1292,1801, 305, 566,1133, 229,
+2067,2057, 706, 167, 483,2002,2672,3295,1820,3561,3067, 316, 378,2746,3452,1112,
+ 136,1981, 507,1651,2917,1117, 285,4591, 182,2580,3522,1304, 335,3303,1835,2504,
+1795,1792,2248, 674,1018,2106,2449,1857,2292,2845, 976,3047,1781,2600,2727,1389,
+1281,  52,3152, 153, 265,3950, 672,3485,3951,4463, 430,1183, 365, 278,2169,  27,
+1407,1336,2304, 209,1340,1730,2202,1852,2403,2883, 979,1737,1062, 631,2829,2542,
+3876,2592, 825,2086,2226,3048,3625, 352,1417,3724, 542, 991, 431,1351,3938,1861,
+2294, 826,1361,2927,3142,3503,1738, 463,2462,2723, 582,1916,1595,2808, 400,3845,
+3891,2868,3621,2254,  58,2492,1123, 910,2160,2614,1372,1603,1196,1072,3385,1700,
+3267,1980, 696, 480,2430, 920, 799,1570,2920,1951,2041,4047,2540,1321,4223,2469,
+3562,2228,1271,2602, 401,2833,3351,2575,5157, 907,2312,1256, 410, 263,3507,1582,
+ 996, 678,1849,2316,1480, 908,3545,2237, 703,2322, 667,1826,2849,1531,2604,2999,
+2407,3146,2151,2630,1786,3711, 469,3542, 497,3899,2409, 858, 837,4446,3393,1274,
+ 786, 620,1845,2001,3311, 484, 308,3367,1204,1815,3691,2332,1532,2557,1842,2020,
+2724,1927,2333,4440, 567,  22,1673,2728,4475,1987,1858,1144,1597, 101,1832,3601,
+  12, 974,3783,4391, 951,1412,   1,3720, 453,4608,4041, 528,1041,1027,3230,2628,
+1129, 875,1051,3291,1203,2262,1069,2860,2799,2149,2615,3278, 144,1758,3040,  31,
+ 475,1680, 366,2685,3184, 311,1642,4008,2466,5036,1593,1493,2809, 216,1420,1668,
+ 233, 304,2128,3284, 232,1429,1768,1040,2008,3407,2740,2967,2543, 242,2133, 778,
+1565,2022,2620, 505,2189,2756,1098,2273, 372,1614, 708, 553,2846,2094,2278, 169,
+3626,2835,4161, 228,2674,3165, 809,1454,1309, 466,1705,1095, 900,3423, 880,2667,
+3751,5258,2317,3109,2571,4317,2766,1503,1342, 866,4447,1118,  63,2076, 314,1881,
+1348,1061, 172, 978,3515,1747, 532, 511,3970,   6, 601, 905,2699,3300,1751, 276,
+1467,3725,2668,  65,4239,2544,2779,2556,1604, 578,2451,1802, 992,2331,2624,1320,
+3446, 713,1513,1013, 103,2786,2447,1661, 886,1702, 916, 654,3574,2031,1556, 751,
+2178,2821,2179,1498,1538,2176, 271, 914,2251,2080,1325, 638,1953,2937,3877,2432,
+2754,  95,3265,1716, 260,1227,4083, 775, 106,1357,3254, 426,1607, 555,2480, 772,
+1985, 244,2546, 474, 495,1046,2611,1851,2061,  71,2089,1675,2590, 742,3758,2843,
+3222,1433, 267,2180,2576,2826,2233,2092,3913,2435, 956,1745,3075, 856,2113,1116,
+ 451,   3,1988,2896,1398, 993,2463,1878,2049,1341,2718,2721,2870,2108, 712,2904,
+4363,2753,2324, 277,2872,2349,2649, 384, 987, 435, 691,3000, 922, 164,3939, 652,
+1500,1184,4153,2482,3373,2165,4848,2335,3775,3508,3154,2806,2830,1554,2102,1664,
+2530,1434,2408, 893,1547,2623,3447,2832,2242,2532,3169,2856,3223,2078,  49,3770,
+3469, 462, 318, 656,2259,3250,3069, 679,1629,2758, 344,1138,1104,3120,1836,1283,
+3115,2154,1437,4448, 934, 759,1999, 794,2862,1038, 533,2560,1722,2342, 855,2626,
+1197,1663,4476,3127,  85,4240,2528,  25,1111,1181,3673, 407,3470,4561,2679,2713,
+ 768,1925,2841,3986,1544,1165, 932, 373,1240,2146,1930,2673, 721,4766, 354,4333,
+ 391,2963, 187,  61,3364,1442,1102, 330,1940,1767, 341,3809,4118, 393,2496,2062,
+2211, 105, 331, 300, 439, 913,1332, 626, 379,3304,1557, 328, 689,3952, 309,1555,
+ 931, 317,2517,3027, 325, 569, 686,2107,3084,  60,1042,1333,2794, 264,3177,4014,
+1628, 258,3712,   7,4464,1176,1043,1778, 683, 114,1975,  78,1492, 383,1886, 510,
+ 386, 645,5291,2891,2069,3305,4138,3867,2939,2603,2493,1935,1066,1848,3588,1015,
+1282,1289,4609, 697,1453,3044,2666,3611,1856,2412,  54, 719,1330, 568,3778,2459,
+1748, 788, 492, 551,1191,1000, 488,3394,3763, 282,1799, 348,2016,1523,3155,2390,
+1049, 382,2019,1788,1170, 729,2968,3523, 897,3926,2785,2938,3292, 350,2319,3238,
+1718,1717,2655,3453,3143,4465, 161,2889,2980,2009,1421,  56,1908,1640,2387,2232,
+1917,1874,2477,4921, 148,  83,3438, 592,4245,2882,1822,1055, 741, 115,1496,1624,
+ 381,1638,4592,1020, 516,3214, 458, 947,4575,1432, 211,1514,2926,1865,2142, 189,
+ 852,1221,1400,1486, 882,2299,4036, 351,  28,1122, 700,6479,6480,6481,6482,6483,  #last 512
+)
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312prober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312prober.py
new file mode 100644
index 00000000..8446d2dd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/gb2312prober.py
@@ -0,0 +1,46 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import GB2312DistributionAnalysis
+from .mbcssm import GB2312_SM_MODEL
+
+class GB2312Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(GB2312Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(GB2312_SM_MODEL)
+        self.distribution_analyzer = GB2312DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "GB2312"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/hebrewprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/hebrewprober.py
new file mode 100644
index 00000000..b0e1bf49
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/hebrewprober.py
@@ -0,0 +1,292 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+#          Shy Shalom
+# Portions created by the Initial Developer are Copyright (C) 2005
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+# This prober doesn't actually recognize a language or a charset.
+# It is a helper prober for the use of the Hebrew model probers
+
+### General ideas of the Hebrew charset recognition ###
+#
+# Four main charsets exist in Hebrew:
+# "ISO-8859-8" - Visual Hebrew
+# "windows-1255" - Logical Hebrew
+# "ISO-8859-8-I" - Logical Hebrew
+# "x-mac-hebrew" - ?? Logical Hebrew ??
+#
+# Both "ISO" charsets use a completely identical set of code points, whereas
+# "windows-1255" and "x-mac-hebrew" are two different proper supersets of
+# these code points. windows-1255 defines additional characters in the range
+# 0x80-0x9F as some misc punctuation marks as well as some Hebrew-specific
+# diacritics and additional 'Yiddish' ligature letters in the range 0xc0-0xd6.
+# x-mac-hebrew defines similar additional code points but with a different
+# mapping.
+#
+# As far as an average Hebrew text with no diacritics is concerned, all four
+# charsets are identical with respect to code points. Meaning that for the
+# main Hebrew alphabet, all four map the same values to all 27 Hebrew letters
+# (including final letters).
+#
+# The dominant difference between these charsets is their directionality.
+# "Visual" directionality means that the text is ordered as if the renderer is
+# not aware of a BIDI rendering algorithm. The renderer sees the text and
+# draws it from left to right. The text itself when ordered naturally is read
+# backwards. A buffer of Visual Hebrew generally looks like so:
+# "[last word of first line spelled backwards] [whole line ordered backwards
+# and spelled backwards] [first word of first line spelled backwards]
+# [end of line] [last word of second line] ... etc' "
+# adding punctuation marks, numbers and English text to visual text is
+# naturally also "visual" and from left to right.
+#
+# "Logical" directionality means the text is ordered "naturally" according to
+# the order it is read. It is the responsibility of the renderer to display
+# the text from right to left. A BIDI algorithm is used to place general
+# punctuation marks, numbers and English text in the text.
+#
+# Texts in x-mac-hebrew are almost impossible to find on the Internet. From
+# what little evidence I could find, it seems that its general directionality
+# is Logical.
+#
+# To sum up all of the above, the Hebrew probing mechanism knows about two
+# charsets:
+# Visual Hebrew - "ISO-8859-8" - backwards text - Words and sentences are
+#    backwards while line order is natural. For charset recognition purposes
+#    the line order is unimportant (In fact, for this implementation, even
+#    word order is unimportant).
+# Logical Hebrew - "windows-1255" - normal, naturally ordered text.
+#
+# "ISO-8859-8-I" is a subset of windows-1255 and doesn't need to be
+#    specifically identified.
+# "x-mac-hebrew" is also identified as windows-1255. A text in x-mac-hebrew
+#    that contain special punctuation marks or diacritics is displayed with
+#    some unconverted characters showing as question marks. This problem might
+#    be corrected using another model prober for x-mac-hebrew. Due to the fact
+#    that x-mac-hebrew texts are so rare, writing another model prober isn't
+#    worth the effort and performance hit.
+#
+#### The Prober ####
+#
+# The prober is divided between two SBCharSetProbers and a HebrewProber,
+# all of which are managed, created, fed data, inquired and deleted by the
+# SBCSGroupProber. The two SBCharSetProbers identify that the text is in
+# fact some kind of Hebrew, Logical or Visual. The final decision about which
+# one is it is made by the HebrewProber by combining final-letter scores
+# with the scores of the two SBCharSetProbers to produce a final answer.
+#
+# The SBCSGroupProber is responsible for stripping the original text of HTML
+# tags, English characters, numbers, low-ASCII punctuation characters, spaces
+# and new lines. It reduces any sequence of such characters to a single space.
+# The buffer fed to each prober in the SBCS group prober is pure text in
+# high-ASCII.
+# The two SBCharSetProbers (model probers) share the same language model:
+# Win1255Model.
+# The first SBCharSetProber uses the model normally as any other
+# SBCharSetProber does, to recognize windows-1255, upon which this model was
+# built. The second SBCharSetProber is told to make the pair-of-letter
+# lookup in the language model backwards. This in practice exactly simulates
+# a visual Hebrew model using the windows-1255 logical Hebrew model.
+#
+# The HebrewProber is not using any language model. All it does is look for
+# final-letter evidence suggesting the text is either logical Hebrew or visual
+# Hebrew. Disjointed from the model probers, the results of the HebrewProber
+# alone are meaningless. HebrewProber always returns 0.00 as confidence
+# since it never identifies a charset by itself. Instead, the pointer to the
+# HebrewProber is passed to the model probers as a helper "Name Prober".
+# When the Group prober receives a positive identification from any prober,
+# it asks for the name of the charset identified. If the prober queried is a
+# Hebrew model prober, the model prober forwards the call to the
+# HebrewProber to make the final decision. In the HebrewProber, the
+# decision is made according to the final-letters scores maintained and Both
+# model probers scores. The answer is returned in the form of the name of the
+# charset identified, either "windows-1255" or "ISO-8859-8".
+
+class HebrewProber(CharSetProber):
+    # windows-1255 / ISO-8859-8 code points of interest
+    FINAL_KAF = 0xea
+    NORMAL_KAF = 0xeb
+    FINAL_MEM = 0xed
+    NORMAL_MEM = 0xee
+    FINAL_NUN = 0xef
+    NORMAL_NUN = 0xf0
+    FINAL_PE = 0xf3
+    NORMAL_PE = 0xf4
+    FINAL_TSADI = 0xf5
+    NORMAL_TSADI = 0xf6
+
+    # Minimum Visual vs Logical final letter score difference.
+    # If the difference is below this, don't rely solely on the final letter score
+    # distance.
+    MIN_FINAL_CHAR_DISTANCE = 5
+
+    # Minimum Visual vs Logical model score difference.
+    # If the difference is below this, don't rely at all on the model score
+    # distance.
+    MIN_MODEL_DISTANCE = 0.01
+
+    VISUAL_HEBREW_NAME = "ISO-8859-8"
+    LOGICAL_HEBREW_NAME = "windows-1255"
+
+    def __init__(self):
+        super(HebrewProber, self).__init__()
+        self._final_char_logical_score = None
+        self._final_char_visual_score = None
+        self._prev = None
+        self._before_prev = None
+        self._logical_prober = None
+        self._visual_prober = None
+        self.reset()
+
+    def reset(self):
+        self._final_char_logical_score = 0
+        self._final_char_visual_score = 0
+        # The two last characters seen in the previous buffer,
+        # mPrev and mBeforePrev are initialized to space in order to simulate
+        # a word delimiter at the beginning of the data
+        self._prev = ' '
+        self._before_prev = ' '
+        # These probers are owned by the group prober.
+
+    def set_model_probers(self, logicalProber, visualProber):
+        self._logical_prober = logicalProber
+        self._visual_prober = visualProber
+
+    def is_final(self, c):
+        return c in [self.FINAL_KAF, self.FINAL_MEM, self.FINAL_NUN,
+                     self.FINAL_PE, self.FINAL_TSADI]
+
+    def is_non_final(self, c):
+        # The normal Tsadi is not a good Non-Final letter due to words like
+        # 'lechotet' (to chat) containing an apostrophe after the tsadi. This
+        # apostrophe is converted to a space in FilterWithoutEnglishLetters
+        # causing the Non-Final tsadi to appear at an end of a word even
+        # though this is not the case in the original text.
+        # The letters Pe and Kaf rarely display a related behavior of not being
+        # a good Non-Final letter. Words like 'Pop', 'Winamp' and 'Mubarak'
+        # for example legally end with a Non-Final Pe or Kaf. However, the
+        # benefit of these letters as Non-Final letters outweighs the damage
+        # since these words are quite rare.
+        return c in [self.NORMAL_KAF, self.NORMAL_MEM,
+                     self.NORMAL_NUN, self.NORMAL_PE]
+
+    def feed(self, byte_str):
+        # Final letter analysis for logical-visual decision.
+        # Look for evidence that the received buffer is either logical Hebrew
+        # or visual Hebrew.
+        # The following cases are checked:
+        # 1) A word longer than 1 letter, ending with a final letter. This is
+        #    an indication that the text is laid out "naturally" since the
+        #    final letter really appears at the end. +1 for logical score.
+        # 2) A word longer than 1 letter, ending with a Non-Final letter. In
+        #    normal Hebrew, words ending with Kaf, Mem, Nun, Pe or Tsadi,
+        #    should not end with the Non-Final form of that letter. Exceptions
+        #    to this rule are mentioned above in isNonFinal(). This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score
+        # 3) A word longer than 1 letter, starting with a final letter. Final
+        #    letters should not appear at the beginning of a word. This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score.
+        #
+        # The visual score and logical score are accumulated throughout the
+        # text and are finally checked against each other in GetCharSetName().
+        # No checking for final letters in the middle of words is done since
+        # that case is not an indication for either Logical or Visual text.
+        #
+        # We automatically filter out all 7-bit characters (replace them with
+        # spaces) so the word boundary detection works properly. [MAP]
+
+        if self.state == ProbingState.NOT_ME:
+            # Both model probers say it's not them. No reason to continue.
+            return ProbingState.NOT_ME
+
+        byte_str = self.filter_high_byte_only(byte_str)
+
+        for cur in byte_str:
+            if cur == ' ':
+                # We stand on a space - a word just ended
+                if self._before_prev != ' ':
+                    # next-to-last char was not a space so self._prev is not a
+                    # 1 letter word
+                    if self.is_final(self._prev):
+                        # case (1) [-2:not space][-1:final letter][cur:space]
+                        self._final_char_logical_score += 1
+                    elif self.is_non_final(self._prev):
+                        # case (2) [-2:not space][-1:Non-Final letter][
+                        #  cur:space]
+                        self._final_char_visual_score += 1
+            else:
+                # Not standing on a space
+                if ((self._before_prev == ' ') and
+                        (self.is_final(self._prev)) and (cur != ' ')):
+                    # case (3) [-2:space][-1:final letter][cur:not space]
+                    self._final_char_visual_score += 1
+            self._before_prev = self._prev
+            self._prev = cur
+
+        # Forever detecting, till the end or until both model probers return
+        # ProbingState.NOT_ME (handled above)
+        return ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        # Make the decision: is it Logical or Visual?
+        # If the final letter score distance is dominant enough, rely on it.
+        finalsub = self._final_char_logical_score - self._final_char_visual_score
+        if finalsub >= self.MIN_FINAL_CHAR_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if finalsub <= -self.MIN_FINAL_CHAR_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # It's not dominant enough, try to rely on the model scores instead.
+        modelsub = (self._logical_prober.get_confidence()
+                    - self._visual_prober.get_confidence())
+        if modelsub > self.MIN_MODEL_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if modelsub < -self.MIN_MODEL_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # Still no good, back to final letter distance, maybe it'll save the
+        # day.
+        if finalsub < 0.0:
+            return self.VISUAL_HEBREW_NAME
+
+        # (finalsub > 0 - Logical) or (don't know what to do) default to
+        # Logical.
+        return self.LOGICAL_HEBREW_NAME
+
+    @property
+    def language(self):
+        return 'Hebrew'
+
+    @property
+    def state(self):
+        # Remain active as long as any of the model probers are active.
+        if (self._logical_prober.state == ProbingState.NOT_ME) and \
+           (self._visual_prober.state == ProbingState.NOT_ME):
+            return ProbingState.NOT_ME
+        return ProbingState.DETECTING
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jisfreq.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jisfreq.py
new file mode 100644
index 00000000..83fc082b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jisfreq.py
@@ -0,0 +1,325 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+#
+# Japanese frequency table, applied to both S-JIS and EUC-JP
+# They are sorted in order.
+
+# 128  --> 0.77094
+# 256  --> 0.85710
+# 512  --> 0.92635
+# 1024 --> 0.97130
+# 2048 --> 0.99431
+#
+# Ideal Distribution Ratio = 0.92635 / (1-0.92635) = 12.58
+# Random Distribution Ration = 512 / (2965+62+83+86-512) = 0.191
+#
+# Typical Distribution Ratio, 25% of IDR
+
+JIS_TYPICAL_DISTRIBUTION_RATIO = 3.0
+
+# Char to FreqOrder table ,
+JIS_TABLE_SIZE = 4368
+
+JIS_CHAR_TO_FREQ_ORDER = (
+  40,   1,   6, 182, 152, 180, 295,2127, 285, 381,3295,4304,3068,4606,3165,3510, #   16
+3511,1822,2785,4607,1193,2226,5070,4608, 171,2996,1247,  18, 179,5071, 856,1661, #   32
+1262,5072, 619, 127,3431,3512,3230,1899,1700, 232, 228,1294,1298, 284, 283,2041, #   48
+2042,1061,1062,  48,  49,  44,  45, 433, 434,1040,1041, 996, 787,2997,1255,4305, #   64
+2108,4609,1684,1648,5073,5074,5075,5076,5077,5078,3687,5079,4610,5080,3927,3928, #   80
+5081,3296,3432, 290,2285,1471,2187,5082,2580,2825,1303,2140,1739,1445,2691,3375, #   96
+1691,3297,4306,4307,4611, 452,3376,1182,2713,3688,3069,4308,5083,5084,5085,5086, #  112
+5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099,5100,5101,5102, #  128
+5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,4097,5113,5114,5115,5116,5117, #  144
+5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,5129,5130,5131,5132,5133, #  160
+5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149, #  176
+5150,5151,5152,4612,5153,5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164, #  192
+5165,5166,5167,5168,5169,5170,5171,5172,5173,5174,5175,1472, 598, 618, 820,1205, #  208
+1309,1412,1858,1307,1692,5176,5177,5178,5179,5180,5181,5182,1142,1452,1234,1172, #  224
+1875,2043,2149,1793,1382,2973, 925,2404,1067,1241, 960,1377,2935,1491, 919,1217, #  240
+1865,2030,1406,1499,2749,4098,5183,5184,5185,5186,5187,5188,2561,4099,3117,1804, #  256
+2049,3689,4309,3513,1663,5189,3166,3118,3298,1587,1561,3433,5190,3119,1625,2998, #  272
+3299,4613,1766,3690,2786,4614,5191,5192,5193,5194,2161,  26,3377,   2,3929,  20, #  288
+3691,  47,4100,  50,  17,  16,  35, 268,  27, 243,  42, 155,  24, 154,  29, 184, #  304
+   4,  91,  14,  92,  53, 396,  33, 289,   9,  37,  64, 620,  21,  39, 321,   5, #  320
+  12,  11,  52,  13,   3, 208, 138,   0,   7,  60, 526, 141, 151,1069, 181, 275, #  336
+1591,  83, 132,1475, 126, 331, 829,  15,  69, 160,  59,  22, 157,  55,1079, 312, #  352
+ 109,  38,  23,  25,  10,  19,  79,5195,  61, 382,1124,   8,  30,5196,5197,5198, #  368
+5199,5200,5201,5202,5203,5204,5205,5206,  89,  62,  74,  34,2416, 112, 139, 196, #  384
+ 271, 149,  84, 607, 131, 765,  46,  88, 153, 683,  76, 874, 101, 258,  57,  80, #  400
+  32, 364, 121,1508, 169,1547,  68, 235, 145,2999,  41, 360,3027,  70,  63,  31, #  416
+  43, 259, 262,1383,  99, 533, 194,  66,  93, 846, 217, 192,  56, 106,  58, 565, #  432
+ 280, 272, 311, 256, 146,  82, 308,  71, 100, 128, 214, 655, 110, 261, 104,1140, #  448
+  54,  51,  36,  87,  67,3070, 185,2618,2936,2020,  28,1066,2390,2059,5207,5208, #  464
+5209,5210,5211,5212,5213,5214,5215,5216,4615,5217,5218,5219,5220,5221,5222,5223, #  480
+5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,5234,5235,5236,3514,5237,5238, #  496
+5239,5240,5241,5242,5243,5244,2297,2031,4616,4310,3692,5245,3071,5246,3598,5247, #  512
+4617,3231,3515,5248,4101,4311,4618,3808,4312,4102,5249,4103,4104,3599,5250,5251, #  528
+5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,5264,5265,5266,5267, #  544
+5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,5279,5280,5281,5282,5283, #  560
+5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299, #  576
+5300,5301,5302,5303,5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315, #  592
+5316,5317,5318,5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331, #  608
+5332,5333,5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347, #  624
+5348,5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, #  640
+5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379, #  656
+5380,5381, 363, 642,2787,2878,2788,2789,2316,3232,2317,3434,2011, 165,1942,3930, #  672
+3931,3932,3933,5382,4619,5383,4620,5384,5385,5386,5387,5388,5389,5390,5391,5392, #  688
+5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, #  704
+5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424, #  720
+5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440, #  736
+5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456, #  752
+5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472, #  768
+5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488, #  784
+5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,5504, #  800
+5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,5519,5520, #  816
+5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,5534,5535,5536, #  832
+5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552, #  848
+5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,5564,5565,5566,5567,5568, #  864
+5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584, #  880
+5585,5586,5587,5588,5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600, #  896
+5601,5602,5603,5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616, #  912
+5617,5618,5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632, #  928
+5633,5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, #  944
+5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664, #  960
+5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680, #  976
+5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696, #  992
+5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712, # 1008
+5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728, # 1024
+5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,5744, # 1040
+5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,5759,5760, # 1056
+5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,5774,5775,5776, # 1072
+5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,5789,5790,5791,5792, # 1088
+5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,5804,5805,5806,5807,5808, # 1104
+5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824, # 1120
+5825,5826,5827,5828,5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840, # 1136
+5841,5842,5843,5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856, # 1152
+5857,5858,5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872, # 1168
+5873,5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, # 1184
+5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904, # 1200
+5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920, # 1216
+5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936, # 1232
+5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952, # 1248
+5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968, # 1264
+5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,5984, # 1280
+5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,5999,6000, # 1296
+6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,6014,6015,6016, # 1312
+6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,6029,6030,6031,6032, # 1328
+6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,6044,6045,6046,6047,6048, # 1344
+6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064, # 1360
+6065,6066,6067,6068,6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080, # 1376
+6081,6082,6083,6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096, # 1392
+6097,6098,6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112, # 1408
+6113,6114,2044,2060,4621, 997,1235, 473,1186,4622, 920,3378,6115,6116, 379,1108, # 1424
+4313,2657,2735,3934,6117,3809, 636,3233, 573,1026,3693,3435,2974,3300,2298,4105, # 1440
+ 854,2937,2463, 393,2581,2417, 539, 752,1280,2750,2480, 140,1161, 440, 708,1569, # 1456
+ 665,2497,1746,1291,1523,3000, 164,1603, 847,1331, 537,1997, 486, 508,1693,2418, # 1472
+1970,2227, 878,1220, 299,1030, 969, 652,2751, 624,1137,3301,2619,  65,3302,2045, # 1488
+1761,1859,3120,1930,3694,3516, 663,1767, 852, 835,3695, 269, 767,2826,2339,1305, # 1504
+ 896,1150, 770,1616,6118, 506,1502,2075,1012,2519, 775,2520,2975,2340,2938,4314, # 1520
+3028,2086,1224,1943,2286,6119,3072,4315,2240,1273,1987,3935,1557, 175, 597, 985, # 1536
+3517,2419,2521,1416,3029, 585, 938,1931,1007,1052,1932,1685,6120,3379,4316,4623, # 1552
+ 804, 599,3121,1333,2128,2539,1159,1554,2032,3810, 687,2033,2904, 952, 675,1467, # 1568
+3436,6121,2241,1096,1786,2440,1543,1924, 980,1813,2228, 781,2692,1879, 728,1918, # 1584
+3696,4624, 548,1950,4625,1809,1088,1356,3303,2522,1944, 502, 972, 373, 513,2827, # 1600
+ 586,2377,2391,1003,1976,1631,6122,2464,1084, 648,1776,4626,2141, 324, 962,2012, # 1616
+2177,2076,1384, 742,2178,1448,1173,1810, 222, 102, 301, 445, 125,2420, 662,2498, # 1632
+ 277, 200,1476,1165,1068, 224,2562,1378,1446, 450,1880, 659, 791, 582,4627,2939, # 1648
+3936,1516,1274, 555,2099,3697,1020,1389,1526,3380,1762,1723,1787,2229, 412,2114, # 1664
+1900,2392,3518, 512,2597, 427,1925,2341,3122,1653,1686,2465,2499, 697, 330, 273, # 1680
+ 380,2162, 951, 832, 780, 991,1301,3073, 965,2270,3519, 668,2523,2636,1286, 535, # 1696
+1407, 518, 671, 957,2658,2378, 267, 611,2197,3030,6123, 248,2299, 967,1799,2356, # 1712
+ 850,1418,3437,1876,1256,1480,2828,1718,6124,6125,1755,1664,2405,6126,4628,2879, # 1728
+2829, 499,2179, 676,4629, 557,2329,2214,2090, 325,3234, 464, 811,3001, 992,2342, # 1744
+2481,1232,1469, 303,2242, 466,1070,2163, 603,1777,2091,4630,2752,4631,2714, 322, # 1760
+2659,1964,1768, 481,2188,1463,2330,2857,3600,2092,3031,2421,4632,2318,2070,1849, # 1776
+2598,4633,1302,2254,1668,1701,2422,3811,2905,3032,3123,2046,4106,1763,1694,4634, # 1792
+1604, 943,1724,1454, 917, 868,2215,1169,2940, 552,1145,1800,1228,1823,1955, 316, # 1808
+1080,2510, 361,1807,2830,4107,2660,3381,1346,1423,1134,4108,6127, 541,1263,1229, # 1824
+1148,2540, 545, 465,1833,2880,3438,1901,3074,2482, 816,3937, 713,1788,2500, 122, # 1840
+1575, 195,1451,2501,1111,6128, 859, 374,1225,2243,2483,4317, 390,1033,3439,3075, # 1856
+2524,1687, 266, 793,1440,2599, 946, 779, 802, 507, 897,1081, 528,2189,1292, 711, # 1872
+1866,1725,1167,1640, 753, 398,2661,1053, 246, 348,4318, 137,1024,3440,1600,2077, # 1888
+2129, 825,4319, 698, 238, 521, 187,2300,1157,2423,1641,1605,1464,1610,1097,2541, # 1904
+1260,1436, 759,2255,1814,2150, 705,3235, 409,2563,3304, 561,3033,2005,2564, 726, # 1920
+1956,2343,3698,4109, 949,3812,3813,3520,1669, 653,1379,2525, 881,2198, 632,2256, # 1936
+1027, 778,1074, 733,1957, 514,1481,2466, 554,2180, 702,3938,1606,1017,1398,6129, # 1952
+1380,3521, 921, 993,1313, 594, 449,1489,1617,1166, 768,1426,1360, 495,1794,3601, # 1968
+1177,3602,1170,4320,2344, 476, 425,3167,4635,3168,1424, 401,2662,1171,3382,1998, # 1984
+1089,4110, 477,3169, 474,6130,1909, 596,2831,1842, 494, 693,1051,1028,1207,3076, # 2000
+ 606,2115, 727,2790,1473,1115, 743,3522, 630, 805,1532,4321,2021, 366,1057, 838, # 2016
+ 684,1114,2142,4322,2050,1492,1892,1808,2271,3814,2424,1971,1447,1373,3305,1090, # 2032
+1536,3939,3523,3306,1455,2199, 336, 369,2331,1035, 584,2393, 902, 718,2600,6131, # 2048
+2753, 463,2151,1149,1611,2467, 715,1308,3124,1268, 343,1413,3236,1517,1347,2663, # 2064
+2093,3940,2022,1131,1553,2100,2941,1427,3441,2942,1323,2484,6132,1980, 872,2368, # 2080
+2441,2943, 320,2369,2116,1082, 679,1933,3941,2791,3815, 625,1143,2023, 422,2200, # 2096
+3816,6133, 730,1695, 356,2257,1626,2301,2858,2637,1627,1778, 937, 883,2906,2693, # 2112
+3002,1769,1086, 400,1063,1325,3307,2792,4111,3077, 456,2345,1046, 747,6134,1524, # 2128
+ 884,1094,3383,1474,2164,1059, 974,1688,2181,2258,1047, 345,1665,1187, 358, 875, # 2144
+3170, 305, 660,3524,2190,1334,1135,3171,1540,1649,2542,1527, 927, 968,2793, 885, # 2160
+1972,1850, 482, 500,2638,1218,1109,1085,2543,1654,2034, 876,  78,2287,1482,1277, # 2176
+ 861,1675,1083,1779, 724,2754, 454, 397,1132,1612,2332, 893, 672,1237, 257,2259, # 2192
+2370, 135,3384, 337,2244, 547, 352, 340, 709,2485,1400, 788,1138,2511, 540, 772, # 2208
+1682,2260,2272,2544,2013,1843,1902,4636,1999,1562,2288,4637,2201,1403,1533, 407, # 2224
+ 576,3308,1254,2071, 978,3385, 170, 136,1201,3125,2664,3172,2394, 213, 912, 873, # 2240
+3603,1713,2202, 699,3604,3699, 813,3442, 493, 531,1054, 468,2907,1483, 304, 281, # 2256
+4112,1726,1252,2094, 339,2319,2130,2639, 756,1563,2944, 748, 571,2976,1588,2425, # 2272
+2715,1851,1460,2426,1528,1392,1973,3237, 288,3309, 685,3386, 296, 892,2716,2216, # 2288
+1570,2245, 722,1747,2217, 905,3238,1103,6135,1893,1441,1965, 251,1805,2371,3700, # 2304
+2601,1919,1078,  75,2182,1509,1592,1270,2640,4638,2152,6136,3310,3817, 524, 706, # 2320
+1075, 292,3818,1756,2602, 317,  98,3173,3605,3525,1844,2218,3819,2502, 814, 567, # 2336
+ 385,2908,1534,6137, 534,1642,3239, 797,6138,1670,1529, 953,4323, 188,1071, 538, # 2352
+ 178, 729,3240,2109,1226,1374,2000,2357,2977, 731,2468,1116,2014,2051,6139,1261, # 2368
+1593, 803,2859,2736,3443, 556, 682, 823,1541,6140,1369,2289,1706,2794, 845, 462, # 2384
+2603,2665,1361, 387, 162,2358,1740, 739,1770,1720,1304,1401,3241,1049, 627,1571, # 2400
+2427,3526,1877,3942,1852,1500, 431,1910,1503, 677, 297,2795, 286,1433,1038,1198, # 2416
+2290,1133,1596,4113,4639,2469,1510,1484,3943,6141,2442, 108, 712,4640,2372, 866, # 2432
+3701,2755,3242,1348, 834,1945,1408,3527,2395,3243,1811, 824, 994,1179,2110,1548, # 2448
+1453, 790,3003, 690,4324,4325,2832,2909,3820,1860,3821, 225,1748, 310, 346,1780, # 2464
+2470, 821,1993,2717,2796, 828, 877,3528,2860,2471,1702,2165,2910,2486,1789, 453, # 2480
+ 359,2291,1676,  73,1164,1461,1127,3311, 421, 604, 314,1037, 589, 116,2487, 737, # 2496
+ 837,1180, 111, 244, 735,6142,2261,1861,1362, 986, 523, 418, 581,2666,3822, 103, # 2512
+ 855, 503,1414,1867,2488,1091, 657,1597, 979, 605,1316,4641,1021,2443,2078,2001, # 2528
+1209,  96, 587,2166,1032, 260,1072,2153, 173,  94, 226,3244, 819,2006,4642,4114, # 2544
+2203, 231,1744, 782,  97,2667, 786,3387, 887, 391, 442,2219,4326,1425,6143,2694, # 2560
+ 633,1544,1202, 483,2015, 592,2052,1958,2472,1655, 419, 129,4327,3444,3312,1714, # 2576
+1257,3078,4328,1518,1098, 865,1310,1019,1885,1512,1734, 469,2444, 148, 773, 436, # 2592
+1815,1868,1128,1055,4329,1245,2756,3445,2154,1934,1039,4643, 579,1238, 932,2320, # 2608
+ 353, 205, 801, 115,2428, 944,2321,1881, 399,2565,1211, 678, 766,3944, 335,2101, # 2624
+1459,1781,1402,3945,2737,2131,1010, 844, 981,1326,1013, 550,1816,1545,2620,1335, # 2640
+1008, 371,2881, 936,1419,1613,3529,1456,1395,2273,1834,2604,1317,2738,2503, 416, # 2656
+1643,4330, 806,1126, 229, 591,3946,1314,1981,1576,1837,1666, 347,1790, 977,3313, # 2672
+ 764,2861,1853, 688,2429,1920,1462,  77, 595, 415,2002,3034, 798,1192,4115,6144, # 2688
+2978,4331,3035,2695,2582,2072,2566, 430,2430,1727, 842,1396,3947,3702, 613, 377, # 2704
+ 278, 236,1417,3388,3314,3174, 757,1869, 107,3530,6145,1194, 623,2262, 207,1253, # 2720
+2167,3446,3948, 492,1117,1935, 536,1838,2757,1246,4332, 696,2095,2406,1393,1572, # 2736
+3175,1782, 583, 190, 253,1390,2230, 830,3126,3389, 934,3245,1703,1749,2979,1870, # 2752
+2545,1656,2204, 869,2346,4116,3176,1817, 496,1764,4644, 942,1504, 404,1903,1122, # 2768
+1580,3606,2945,1022, 515, 372,1735, 955,2431,3036,6146,2797,1110,2302,2798, 617, # 2784
+6147, 441, 762,1771,3447,3607,3608,1904, 840,3037,  86, 939,1385, 572,1370,2445, # 2800
+1336, 114,3703, 898, 294, 203,3315, 703,1583,2274, 429, 961,4333,1854,1951,3390, # 2816
+2373,3704,4334,1318,1381, 966,1911,2322,1006,1155, 309, 989, 458,2718,1795,1372, # 2832
+1203, 252,1689,1363,3177, 517,1936, 168,1490, 562, 193,3823,1042,4117,1835, 551, # 2848
+ 470,4645, 395, 489,3448,1871,1465,2583,2641, 417,1493, 279,1295, 511,1236,1119, # 2864
+  72,1231,1982,1812,3004, 871,1564, 984,3449,1667,2696,2096,4646,2347,2833,1673, # 2880
+3609, 695,3246,2668, 807,1183,4647, 890, 388,2333,1801,1457,2911,1765,1477,1031, # 2896
+3316,3317,1278,3391,2799,2292,2526, 163,3450,4335,2669,1404,1802,6148,2323,2407, # 2912
+1584,1728,1494,1824,1269, 298, 909,3318,1034,1632, 375, 776,1683,2061, 291, 210, # 2928
+1123, 809,1249,1002,2642,3038, 206,1011,2132, 144, 975, 882,1565, 342, 667, 754, # 2944
+1442,2143,1299,2303,2062, 447, 626,2205,1221,2739,2912,1144,1214,2206,2584, 760, # 2960
+1715, 614, 950,1281,2670,2621, 810, 577,1287,2546,4648, 242,2168, 250,2643, 691, # 2976
+ 123,2644, 647, 313,1029, 689,1357,2946,1650, 216, 771,1339,1306, 808,2063, 549, # 2992
+ 913,1371,2913,2914,6149,1466,1092,1174,1196,1311,2605,2396,1783,1796,3079, 406, # 3008
+2671,2117,3949,4649, 487,1825,2220,6150,2915, 448,2348,1073,6151,2397,1707, 130, # 3024
+ 900,1598, 329, 176,1959,2527,1620,6152,2275,4336,3319,1983,2191,3705,3610,2155, # 3040
+3706,1912,1513,1614,6153,1988, 646, 392,2304,1589,3320,3039,1826,1239,1352,1340, # 3056
+2916, 505,2567,1709,1437,2408,2547, 906,6154,2672, 384,1458,1594,1100,1329, 710, # 3072
+ 423,3531,2064,2231,2622,1989,2673,1087,1882, 333, 841,3005,1296,2882,2379, 580, # 3088
+1937,1827,1293,2585, 601, 574, 249,1772,4118,2079,1120, 645, 901,1176,1690, 795, # 3104
+2207, 478,1434, 516,1190,1530, 761,2080, 930,1264, 355, 435,1552, 644,1791, 987, # 3120
+ 220,1364,1163,1121,1538, 306,2169,1327,1222, 546,2645, 218, 241, 610,1704,3321, # 3136
+1984,1839,1966,2528, 451,6155,2586,3707,2568, 907,3178, 254,2947, 186,1845,4650, # 3152
+ 745, 432,1757, 428,1633, 888,2246,2221,2489,3611,2118,1258,1265, 956,3127,1784, # 3168
+4337,2490, 319, 510, 119, 457,3612, 274,2035,2007,4651,1409,3128, 970,2758, 590, # 3184
+2800, 661,2247,4652,2008,3950,1420,1549,3080,3322,3951,1651,1375,2111, 485,2491, # 3200
+1429,1156,6156,2548,2183,1495, 831,1840,2529,2446, 501,1657, 307,1894,3247,1341, # 3216
+ 666, 899,2156,1539,2549,1559, 886, 349,2208,3081,2305,1736,3824,2170,2759,1014, # 3232
+1913,1386, 542,1397,2948, 490, 368, 716, 362, 159, 282,2569,1129,1658,1288,1750, # 3248
+2674, 276, 649,2016, 751,1496, 658,1818,1284,1862,2209,2087,2512,3451, 622,2834, # 3264
+ 376, 117,1060,2053,1208,1721,1101,1443, 247,1250,3179,1792,3952,2760,2398,3953, # 3280
+6157,2144,3708, 446,2432,1151,2570,3452,2447,2761,2835,1210,2448,3082, 424,2222, # 3296
+1251,2449,2119,2836, 504,1581,4338, 602, 817, 857,3825,2349,2306, 357,3826,1470, # 3312
+1883,2883, 255, 958, 929,2917,3248, 302,4653,1050,1271,1751,2307,1952,1430,2697, # 3328
+2719,2359, 354,3180, 777, 158,2036,4339,1659,4340,4654,2308,2949,2248,1146,2232, # 3344
+3532,2720,1696,2623,3827,6158,3129,1550,2698,1485,1297,1428, 637, 931,2721,2145, # 3360
+ 914,2550,2587,  81,2450, 612, 827,2646,1242,4655,1118,2884, 472,1855,3181,3533, # 3376
+3534, 569,1353,2699,1244,1758,2588,4119,2009,2762,2171,3709,1312,1531,6159,1152, # 3392
+1938, 134,1830, 471,3710,2276,1112,1535,3323,3453,3535, 982,1337,2950, 488, 826, # 3408
+ 674,1058,1628,4120,2017, 522,2399, 211, 568,1367,3454, 350, 293,1872,1139,3249, # 3424
+1399,1946,3006,1300,2360,3324, 588, 736,6160,2606, 744, 669,3536,3828,6161,1358, # 3440
+ 199, 723, 848, 933, 851,1939,1505,1514,1338,1618,1831,4656,1634,3613, 443,2740, # 3456
+3829, 717,1947, 491,1914,6162,2551,1542,4121,1025,6163,1099,1223, 198,3040,2722, # 3472
+ 370, 410,1905,2589, 998,1248,3182,2380, 519,1449,4122,1710, 947, 928,1153,4341, # 3488
+2277, 344,2624,1511, 615, 105, 161,1212,1076,1960,3130,2054,1926,1175,1906,2473, # 3504
+ 414,1873,2801,6164,2309, 315,1319,3325, 318,2018,2146,2157, 963, 631, 223,4342, # 3520
+4343,2675, 479,3711,1197,2625,3712,2676,2361,6165,4344,4123,6166,2451,3183,1886, # 3536
+2184,1674,1330,1711,1635,1506, 799, 219,3250,3083,3954,1677,3713,3326,2081,3614, # 3552
+1652,2073,4657,1147,3041,1752, 643,1961, 147,1974,3955,6167,1716,2037, 918,3007, # 3568
+1994, 120,1537, 118, 609,3184,4345, 740,3455,1219, 332,1615,3830,6168,1621,2980, # 3584
+1582, 783, 212, 553,2350,3714,1349,2433,2082,4124, 889,6169,2310,1275,1410, 973, # 3600
+ 166,1320,3456,1797,1215,3185,2885,1846,2590,2763,4658, 629, 822,3008, 763, 940, # 3616
+1990,2862, 439,2409,1566,1240,1622, 926,1282,1907,2764, 654,2210,1607, 327,1130, # 3632
+3956,1678,1623,6170,2434,2192, 686, 608,3831,3715, 903,3957,3042,6171,2741,1522, # 3648
+1915,1105,1555,2552,1359, 323,3251,4346,3457, 738,1354,2553,2311,2334,1828,2003, # 3664
+3832,1753,2351,1227,6172,1887,4125,1478,6173,2410,1874,1712,1847, 520,1204,2607, # 3680
+ 264,4659, 836,2677,2102, 600,4660,3833,2278,3084,6174,4347,3615,1342, 640, 532, # 3696
+ 543,2608,1888,2400,2591,1009,4348,1497, 341,1737,3616,2723,1394, 529,3252,1321, # 3712
+ 983,4661,1515,2120, 971,2592, 924, 287,1662,3186,4349,2700,4350,1519, 908,1948, # 3728
+2452, 156, 796,1629,1486,2223,2055, 694,4126,1259,1036,3392,1213,2249,2742,1889, # 3744
+1230,3958,1015, 910, 408, 559,3617,4662, 746, 725, 935,4663,3959,3009,1289, 563, # 3760
+ 867,4664,3960,1567,2981,2038,2626, 988,2263,2381,4351, 143,2374, 704,1895,6175, # 3776
+1188,3716,2088, 673,3085,2362,4352, 484,1608,1921,2765,2918, 215, 904,3618,3537, # 3792
+ 894, 509, 976,3043,2701,3961,4353,2837,2982, 498,6176,6177,1102,3538,1332,3393, # 3808
+1487,1636,1637, 233, 245,3962, 383, 650, 995,3044, 460,1520,1206,2352, 749,3327, # 3824
+ 530, 700, 389,1438,1560,1773,3963,2264, 719,2951,2724,3834, 870,1832,1644,1000, # 3840
+ 839,2474,3717, 197,1630,3394, 365,2886,3964,1285,2133, 734, 922, 818,1106, 732, # 3856
+ 480,2083,1774,3458, 923,2279,1350, 221,3086,  85,2233,2234,3835,1585,3010,2147, # 3872
+1387,1705,2382,1619,2475, 133, 239,2802,1991,1016,2084,2383, 411,2838,1113, 651, # 3888
+1985,1160,3328, 990,1863,3087,1048,1276,2647, 265,2627,1599,3253,2056, 150, 638, # 3904
+2019, 656, 853, 326,1479, 680,1439,4354,1001,1759, 413,3459,3395,2492,1431, 459, # 3920
+4355,1125,3329,2265,1953,1450,2065,2863, 849, 351,2678,3131,3254,3255,1104,1577, # 3936
+ 227,1351,1645,2453,2193,1421,2887, 812,2121, 634,  95,2435, 201,2312,4665,1646, # 3952
+1671,2743,1601,2554,2702,2648,2280,1315,1366,2089,3132,1573,3718,3965,1729,1189, # 3968
+ 328,2679,1077,1940,1136, 558,1283, 964,1195, 621,2074,1199,1743,3460,3619,1896, # 3984
+1916,1890,3836,2952,1154,2112,1064, 862, 378,3011,2066,2113,2803,1568,2839,6178, # 4000
+3088,2919,1941,1660,2004,1992,2194, 142, 707,1590,1708,1624,1922,1023,1836,1233, # 4016
+1004,2313, 789, 741,3620,6179,1609,2411,1200,4127,3719,3720,4666,2057,3721, 593, # 4032
+2840, 367,2920,1878,6180,3461,1521, 628,1168, 692,2211,2649, 300, 720,2067,2571, # 4048
+2953,3396, 959,2504,3966,3539,3462,1977, 701,6181, 954,1043, 800, 681, 183,3722, # 4064
+1803,1730,3540,4128,2103, 815,2314, 174, 467, 230,2454,1093,2134, 755,3541,3397, # 4080
+1141,1162,6182,1738,2039, 270,3256,2513,1005,1647,2185,3837, 858,1679,1897,1719, # 4096
+2954,2324,1806, 402, 670, 167,4129,1498,2158,2104, 750,6183, 915, 189,1680,1551, # 4112
+ 455,4356,1501,2455, 405,1095,2955, 338,1586,1266,1819, 570, 641,1324, 237,1556, # 4128
+2650,1388,3723,6184,1368,2384,1343,1978,3089,2436, 879,3724, 792,1191, 758,3012, # 4144
+1411,2135,1322,4357, 240,4667,1848,3725,1574,6185, 420,3045,1546,1391, 714,4358, # 4160
+1967, 941,1864, 863, 664, 426, 560,1731,2680,1785,2864,1949,2363, 403,3330,1415, # 4176
+1279,2136,1697,2335, 204, 721,2097,3838,  90,6186,2085,2505, 191,3967, 124,2148, # 4192
+1376,1798,1178,1107,1898,1405, 860,4359,1243,1272,2375,2983,1558,2456,1638, 113, # 4208
+3621, 578,1923,2609, 880, 386,4130, 784,2186,2266,1422,2956,2172,1722, 497, 263, # 4224
+2514,1267,2412,2610, 177,2703,3542, 774,1927,1344, 616,1432,1595,1018, 172,4360, # 4240
+2325, 911,4361, 438,1468,3622, 794,3968,2024,2173,1681,1829,2957, 945, 895,3090, # 4256
+ 575,2212,2476, 475,2401,2681, 785,2744,1745,2293,2555,1975,3133,2865, 394,4668, # 4272
+3839, 635,4131, 639, 202,1507,2195,2766,1345,1435,2572,3726,1908,1184,1181,2457, # 4288
+3727,3134,4362, 843,2611, 437, 916,4669, 234, 769,1884,3046,3047,3623, 833,6187, # 4304
+1639,2250,2402,1355,1185,2010,2047, 999, 525,1732,1290,1488,2612, 948,1578,3728, # 4320
+2413,2477,1216,2725,2159, 334,3840,1328,3624,2921,1525,4132, 564,1056, 891,4363, # 4336
+1444,1698,2385,2251,3729,1365,2281,2235,1717,6188, 864,3841,2515, 444, 527,2767, # 4352
+2922,3625, 544, 461,6189, 566, 209,2437,3398,2098,1065,2068,3331,3626,3257,2137, # 4368  #last 512
+)
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jpcntx.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jpcntx.py
new file mode 100644
index 00000000..20044e4b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/jpcntx.py
@@ -0,0 +1,233 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+
+# This is hiragana 2-char sequence table, the number in each cell represents its frequency category
+jp2CharContext = (
+(0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1),
+(2,4,0,4,0,3,0,4,0,3,4,4,4,2,4,3,3,4,3,2,3,3,4,2,3,3,3,2,4,1,4,3,3,1,5,4,3,4,3,4,3,5,3,0,3,5,4,2,0,3,1,0,3,3,0,3,3,0,1,1,0,4,3,0,3,3,0,4,0,2,0,3,5,5,5,5,4,0,4,1,0,3,4),
+(0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2),
+(0,4,0,5,0,5,0,4,0,4,5,4,4,3,5,3,5,1,5,3,4,3,4,4,3,4,3,3,4,3,5,4,4,3,5,5,3,5,5,5,3,5,5,3,4,5,5,3,1,3,2,0,3,4,0,4,2,0,4,2,1,5,3,2,3,5,0,4,0,2,0,5,4,4,5,4,5,0,4,0,0,4,4),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,3,0,4,0,3,0,3,0,4,5,4,3,3,3,3,4,3,5,4,4,3,5,4,4,3,4,3,4,4,4,4,5,3,4,4,3,4,5,5,4,5,5,1,4,5,4,3,0,3,3,1,3,3,0,4,4,0,3,3,1,5,3,3,3,5,0,4,0,3,0,4,4,3,4,3,3,0,4,1,1,3,4),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,4,0,3,0,3,0,4,0,3,4,4,3,2,2,1,2,1,3,1,3,3,3,3,3,4,3,1,3,3,5,3,3,0,4,3,0,5,4,3,3,5,4,4,3,4,4,5,0,1,2,0,1,2,0,2,2,0,1,0,0,5,2,2,1,4,0,3,0,1,0,4,4,3,5,4,3,0,2,1,0,4,3),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,3,0,5,0,4,0,2,1,4,4,2,4,1,4,2,4,2,4,3,3,3,4,3,3,3,3,1,4,2,3,3,3,1,4,4,1,1,1,4,3,3,2,0,2,4,3,2,0,3,3,0,3,1,1,0,0,0,3,3,0,4,2,2,3,4,0,4,0,3,0,4,4,5,3,4,4,0,3,0,0,1,4),
+(1,4,0,4,0,4,0,4,0,3,5,4,4,3,4,3,5,4,3,3,4,3,5,4,4,4,4,3,4,2,4,3,3,1,5,4,3,2,4,5,4,5,5,4,4,5,4,4,0,3,2,2,3,3,0,4,3,1,3,2,1,4,3,3,4,5,0,3,0,2,0,4,5,5,4,5,4,0,4,0,0,5,4),
+(0,5,0,5,0,4,0,3,0,4,4,3,4,3,3,3,4,0,4,4,4,3,4,3,4,3,3,1,4,2,4,3,4,0,5,4,1,4,5,4,4,5,3,2,4,3,4,3,2,4,1,3,3,3,2,3,2,0,4,3,3,4,3,3,3,4,0,4,0,3,0,4,5,4,4,4,3,0,4,1,0,1,3),
+(0,3,1,4,0,3,0,2,0,3,4,4,3,1,4,2,3,3,4,3,4,3,4,3,4,4,3,2,3,1,5,4,4,1,4,4,3,5,4,4,3,5,5,4,3,4,4,3,1,2,3,1,2,2,0,3,2,0,3,1,0,5,3,3,3,4,3,3,3,3,4,4,4,4,5,4,2,0,3,3,2,4,3),
+(0,2,0,3,0,1,0,1,0,0,3,2,0,0,2,0,1,0,2,1,3,3,3,1,2,3,1,0,1,0,4,2,1,1,3,3,0,4,3,3,1,4,3,3,0,3,3,2,0,0,0,0,1,0,0,2,0,0,0,0,0,4,1,0,2,3,2,2,2,1,3,3,3,4,4,3,2,0,3,1,0,3,3),
+(0,4,0,4,0,3,0,3,0,4,4,4,3,3,3,3,3,3,4,3,4,2,4,3,4,3,3,2,4,3,4,5,4,1,4,5,3,5,4,5,3,5,4,0,3,5,5,3,1,3,3,2,2,3,0,3,4,1,3,3,2,4,3,3,3,4,0,4,0,3,0,4,5,4,4,5,3,0,4,1,0,3,4),
+(0,2,0,3,0,3,0,0,0,2,2,2,1,0,1,0,0,0,3,0,3,0,3,0,1,3,1,0,3,1,3,3,3,1,3,3,3,0,1,3,1,3,4,0,0,3,1,1,0,3,2,0,0,0,0,1,3,0,1,0,0,3,3,2,0,3,0,0,0,0,0,3,4,3,4,3,3,0,3,0,0,2,3),
+(2,3,0,3,0,2,0,1,0,3,3,4,3,1,3,1,1,1,3,1,4,3,4,3,3,3,0,0,3,1,5,4,3,1,4,3,2,5,5,4,4,4,4,3,3,4,4,4,0,2,1,1,3,2,0,1,2,0,0,1,0,4,1,3,3,3,0,3,0,1,0,4,4,4,5,5,3,0,2,0,0,4,4),
+(0,2,0,1,0,3,1,3,0,2,3,3,3,0,3,1,0,0,3,0,3,2,3,1,3,2,1,1,0,0,4,2,1,0,2,3,1,4,3,2,0,4,4,3,1,3,1,3,0,1,0,0,1,0,0,0,1,0,0,0,0,4,1,1,1,2,0,3,0,0,0,3,4,2,4,3,2,0,1,0,0,3,3),
+(0,1,0,4,0,5,0,4,0,2,4,4,2,3,3,2,3,3,5,3,3,3,4,3,4,2,3,0,4,3,3,3,4,1,4,3,2,1,5,5,3,4,5,1,3,5,4,2,0,3,3,0,1,3,0,4,2,0,1,3,1,4,3,3,3,3,0,3,0,1,0,3,4,4,4,5,5,0,3,0,1,4,5),
+(0,2,0,3,0,3,0,0,0,2,3,1,3,0,4,0,1,1,3,0,3,4,3,2,3,1,0,3,3,2,3,1,3,0,2,3,0,2,1,4,1,2,2,0,0,3,3,0,0,2,0,0,0,1,0,0,0,0,2,2,0,3,2,1,3,3,0,2,0,2,0,0,3,3,1,2,4,0,3,0,2,2,3),
+(2,4,0,5,0,4,0,4,0,2,4,4,4,3,4,3,3,3,1,2,4,3,4,3,4,4,5,0,3,3,3,3,2,0,4,3,1,4,3,4,1,4,4,3,3,4,4,3,1,2,3,0,4,2,0,4,1,0,3,3,0,4,3,3,3,4,0,4,0,2,0,3,5,3,4,5,2,0,3,0,0,4,5),
+(0,3,0,4,0,1,0,1,0,1,3,2,2,1,3,0,3,0,2,0,2,0,3,0,2,0,0,0,1,0,1,1,0,0,3,1,0,0,0,4,0,3,1,0,2,1,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,4,2,2,3,1,0,3,0,0,0,1,4,4,4,3,0,0,4,0,0,1,4),
+(1,4,1,5,0,3,0,3,0,4,5,4,4,3,5,3,3,4,4,3,4,1,3,3,3,3,2,1,4,1,5,4,3,1,4,4,3,5,4,4,3,5,4,3,3,4,4,4,0,3,3,1,2,3,0,3,1,0,3,3,0,5,4,4,4,4,4,4,3,3,5,4,4,3,3,5,4,0,3,2,0,4,4),
+(0,2,0,3,0,1,0,0,0,1,3,3,3,2,4,1,3,0,3,1,3,0,2,2,1,1,0,0,2,0,4,3,1,0,4,3,0,4,4,4,1,4,3,1,1,3,3,1,0,2,0,0,1,3,0,0,0,0,2,0,0,4,3,2,4,3,5,4,3,3,3,4,3,3,4,3,3,0,2,1,0,3,3),
+(0,2,0,4,0,3,0,2,0,2,5,5,3,4,4,4,4,1,4,3,3,0,4,3,4,3,1,3,3,2,4,3,0,3,4,3,0,3,4,4,2,4,4,0,4,5,3,3,2,2,1,1,1,2,0,1,5,0,3,3,2,4,3,3,3,4,0,3,0,2,0,4,4,3,5,5,0,0,3,0,2,3,3),
+(0,3,0,4,0,3,0,1,0,3,4,3,3,1,3,3,3,0,3,1,3,0,4,3,3,1,1,0,3,0,3,3,0,0,4,4,0,1,5,4,3,3,5,0,3,3,4,3,0,2,0,1,1,1,0,1,3,0,1,2,1,3,3,2,3,3,0,3,0,1,0,1,3,3,4,4,1,0,1,2,2,1,3),
+(0,1,0,4,0,4,0,3,0,1,3,3,3,2,3,1,1,0,3,0,3,3,4,3,2,4,2,0,1,0,4,3,2,0,4,3,0,5,3,3,2,4,4,4,3,3,3,4,0,1,3,0,0,1,0,0,1,0,0,0,0,4,2,3,3,3,0,3,0,0,0,4,4,4,5,3,2,0,3,3,0,3,5),
+(0,2,0,3,0,0,0,3,0,1,3,0,2,0,0,0,1,0,3,1,1,3,3,0,0,3,0,0,3,0,2,3,1,0,3,1,0,3,3,2,0,4,2,2,0,2,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,2,1,2,0,1,0,1,0,0,0,1,3,1,2,0,0,0,1,0,0,1,4),
+(0,3,0,3,0,5,0,1,0,2,4,3,1,3,3,2,1,1,5,2,1,0,5,1,2,0,0,0,3,3,2,2,3,2,4,3,0,0,3,3,1,3,3,0,2,5,3,4,0,3,3,0,1,2,0,2,2,0,3,2,0,2,2,3,3,3,0,2,0,1,0,3,4,4,2,5,4,0,3,0,0,3,5),
+(0,3,0,3,0,3,0,1,0,3,3,3,3,0,3,0,2,0,2,1,1,0,2,0,1,0,0,0,2,1,0,0,1,0,3,2,0,0,3,3,1,2,3,1,0,3,3,0,0,1,0,0,0,0,0,2,0,0,0,0,0,2,3,1,2,3,0,3,0,1,0,3,2,1,0,4,3,0,1,1,0,3,3),
+(0,4,0,5,0,3,0,3,0,4,5,5,4,3,5,3,4,3,5,3,3,2,5,3,4,4,4,3,4,3,4,5,5,3,4,4,3,4,4,5,4,4,4,3,4,5,5,4,2,3,4,2,3,4,0,3,3,1,4,3,2,4,3,3,5,5,0,3,0,3,0,5,5,5,5,4,4,0,4,0,1,4,4),
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+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,3,0,3,0,2,0,3,0,1,5,4,3,3,3,1,4,2,1,2,3,4,4,2,4,4,5,0,3,1,4,3,4,0,4,3,3,3,2,3,2,5,3,4,3,2,2,3,0,0,3,0,2,1,0,1,2,0,0,0,0,2,1,1,3,1,0,2,0,4,0,3,4,4,4,5,2,0,2,0,0,1,3),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,1,1,0,0,0,4,2,1,1,0,1,0,3,2,0,0,3,1,1,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,1,0,0,0,2,0,0,0,1,4,0,4,2,1,0,0,0,0,0,1),
+(0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,3,1,0,0,0,2,0,2,1,0,0,1,2,1,0,1,1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,1,3,1,0,0,0,0,0,1,0,0,2,1,0,0,0,0,0,0,0,0,2),
+(0,4,0,4,0,4,0,3,0,4,4,3,4,2,4,3,2,0,4,4,4,3,5,3,5,3,3,2,4,2,4,3,4,3,1,4,0,2,3,4,4,4,3,3,3,4,4,4,3,4,1,3,4,3,2,1,2,1,3,3,3,4,4,3,3,5,0,4,0,3,0,4,3,3,3,2,1,0,3,0,0,3,3),
+(0,4,0,3,0,3,0,3,0,3,5,5,3,3,3,3,4,3,4,3,3,3,4,4,4,3,3,3,3,4,3,5,3,3,1,3,2,4,5,5,5,5,4,3,4,5,5,3,2,2,3,3,3,3,2,3,3,1,2,3,2,4,3,3,3,4,0,4,0,2,0,4,3,2,2,1,2,0,3,0,0,4,1),
+)
+
+class JapaneseContextAnalysis(object):
+    NUM_OF_CATEGORY = 6
+    DONT_KNOW = -1
+    ENOUGH_REL_THRESHOLD = 100
+    MAX_REL_THRESHOLD = 1000
+    MINIMUM_DATA_THRESHOLD = 4
+
+    def __init__(self):
+        self._total_rel = None
+        self._rel_sample = None
+        self._need_to_skip_char_num = None
+        self._last_char_order = None
+        self._done = None
+        self.reset()
+
+    def reset(self):
+        self._total_rel = 0  # total sequence received
+        # category counters, each integer counts sequence in its category
+        self._rel_sample = [0] * self.NUM_OF_CATEGORY
+        # if last byte in current buffer is not the last byte of a character,
+        # we need to know how many bytes to skip in next buffer
+        self._need_to_skip_char_num = 0
+        self._last_char_order = -1  # The order of previous char
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+
+    def feed(self, byte_str, num_bytes):
+        if self._done:
+            return
+
+        # The buffer we got is byte oriented, and a character may span in more than one
+        # buffers. In case the last one or two byte in last buffer is not
+        # complete, we record how many byte needed to complete that character
+        # and skip these bytes here.  We can choose to record those bytes as
+        # well and analyse the character once it is complete, but since a
+        # character will not make much difference, by simply skipping
+        # this character will simply our logic and improve performance.
+        i = self._need_to_skip_char_num
+        while i < num_bytes:
+            order, char_len = self.get_order(byte_str[i:i + 2])
+            i += char_len
+            if i > num_bytes:
+                self._need_to_skip_char_num = i - num_bytes
+                self._last_char_order = -1
+            else:
+                if (order != -1) and (self._last_char_order != -1):
+                    self._total_rel += 1
+                    if self._total_rel > self.MAX_REL_THRESHOLD:
+                        self._done = True
+                        break
+                    self._rel_sample[jp2CharContext[self._last_char_order][order]] += 1
+                self._last_char_order = order
+
+    def got_enough_data(self):
+        return self._total_rel > self.ENOUGH_REL_THRESHOLD
+
+    def get_confidence(self):
+        # This is just one way to calculate confidence. It works well for me.
+        if self._total_rel > self.MINIMUM_DATA_THRESHOLD:
+            return (self._total_rel - self._rel_sample[0]) / self._total_rel
+        else:
+            return self.DONT_KNOW
+
+    def get_order(self, byte_str):
+        return -1, 1
+
+class SJISContextAnalysis(JapaneseContextAnalysis):
+    def __init__(self):
+        super(SJISContextAnalysis, self).__init__()
+        self._charset_name = "SHIFT_JIS"
+
+    @property
+    def charset_name(self):
+        return self._charset_name
+
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (0x81 <= first_char <= 0x9F) or (0xE0 <= first_char <= 0xFC):
+            char_len = 2
+            if (first_char == 0x87) or (0xFA <= first_char <= 0xFC):
+                self._charset_name = "CP932"
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 202) and (0x9F <= second_char <= 0xF1):
+                return second_char - 0x9F, char_len
+
+        return -1, char_len
+
+class EUCJPContextAnalysis(JapaneseContextAnalysis):
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (first_char == 0x8E) or (0xA1 <= first_char <= 0xFE):
+            char_len = 2
+        elif first_char == 0x8F:
+            char_len = 3
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 0xA4) and (0xA1 <= second_char <= 0xF3):
+                return second_char - 0xA1, char_len
+
+        return -1, char_len
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langbulgarianmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
new file mode 100644
index 00000000..2aa4fb2e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
@@ -0,0 +1,228 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+# this table is modified base on win1251BulgarianCharToOrderMap, so
+# only number <64 is sure valid
+
+Latin5_BulgarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
+110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
+253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
+116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
+194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,  # 80
+210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,  # 90
+ 81,226,227,228,229,230,105,231,232,233,234,235,236, 45,237,238,  # a0
+ 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # b0
+ 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,239, 67,240, 60, 56,  # c0
+  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # d0
+  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,241, 42, 16,  # e0
+ 62,242,243,244, 58,245, 98,246,247,248,249,250,251, 91,252,253,  # f0
+)
+
+win1251BulgarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
+110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
+253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
+116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
+206,207,208,209,210,211,212,213,120,214,215,216,217,218,219,220,  # 80
+221, 78, 64, 83,121, 98,117,105,222,223,224,225,226,227,228,229,  # 90
+ 88,230,231,232,233,122, 89,106,234,235,236,237,238, 45,239,240,  # a0
+ 73, 80,118,114,241,242,243,244,245, 62, 58,246,247,248,249,250,  # b0
+ 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # c0
+ 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,251, 67,252, 60, 56,  # d0
+  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # e0
+  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,253, 42, 16,  # f0
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 96.9392%
+# first 1024 sequences:3.0618%
+# rest  sequences:     0.2992%
+# negative sequences:  0.0020%
+BulgarianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,3,3,3,3,3,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,2,2,1,2,2,
+3,1,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,0,1,
+0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,3,3,0,3,1,0,
+0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,2,3,2,2,1,3,3,3,3,2,2,2,1,1,2,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,2,3,2,2,3,3,1,1,2,3,3,2,3,3,3,3,2,1,2,0,2,0,3,0,0,
+0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,1,3,3,3,3,3,2,3,2,3,3,3,3,3,2,3,3,1,3,0,3,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,1,3,3,2,3,3,3,1,3,3,2,3,2,2,2,0,0,2,0,2,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,3,3,1,2,2,3,2,1,1,2,0,2,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,2,3,3,1,2,3,2,2,2,3,3,3,3,3,2,2,3,1,2,0,2,1,2,0,0,
+0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,1,3,3,3,3,3,2,3,3,3,2,3,3,2,3,2,2,2,3,1,2,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,1,1,1,2,2,1,3,1,3,2,2,3,0,0,1,0,1,0,1,0,0,
+0,0,0,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,2,2,3,2,2,3,1,2,1,1,1,2,3,1,3,1,2,2,0,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,1,3,2,2,3,3,1,2,3,1,1,3,3,3,3,1,2,2,1,1,1,0,2,0,2,0,1,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,2,2,3,3,3,2,2,1,1,2,0,2,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,0,1,2,1,3,3,2,3,3,3,3,3,2,3,2,1,0,3,1,2,1,2,1,2,3,2,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,1,2,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,1,3,3,2,3,3,2,2,2,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,0,3,3,3,3,3,2,1,1,2,1,3,3,0,3,1,1,1,1,3,2,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,1,1,3,1,3,3,2,3,2,2,2,3,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,2,3,3,2,2,3,2,1,1,1,1,1,3,1,3,1,1,0,0,0,1,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,2,3,2,0,3,2,0,3,0,2,0,0,2,1,3,1,0,0,1,0,0,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,2,1,1,1,1,2,1,1,2,1,1,1,2,2,1,2,1,1,1,0,1,1,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,2,1,3,1,1,2,1,3,2,1,1,0,1,2,3,2,1,1,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,2,2,1,0,1,0,0,1,0,0,0,2,1,0,3,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,2,3,2,3,3,1,3,2,1,1,1,2,1,1,2,1,3,0,1,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,2,2,3,3,2,3,2,2,2,3,1,2,2,1,1,2,1,1,2,2,0,1,1,0,1,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,3,1,0,2,2,1,3,2,1,0,0,2,0,2,0,1,0,0,0,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,1,2,0,2,3,1,2,3,2,0,1,3,1,2,1,1,1,0,0,1,0,0,2,2,2,3,
+2,2,2,2,1,2,1,1,2,2,1,1,2,0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1,1,0,1,
+3,3,3,3,3,2,1,2,2,1,2,0,2,0,1,0,1,2,1,2,1,1,0,0,0,1,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,2,3,3,1,1,3,1,0,3,2,1,0,0,0,1,2,0,2,0,1,0,0,0,1,0,1,2,1,2,2,
+1,1,1,1,1,1,1,2,2,2,1,1,1,1,1,1,1,0,1,2,1,1,1,0,0,0,0,0,1,1,0,0,
+3,1,0,1,0,2,3,2,2,2,3,2,2,2,2,2,1,0,2,1,2,1,1,1,0,1,2,1,2,2,2,1,
+1,1,2,2,2,2,1,2,1,1,0,1,2,1,2,2,2,1,1,1,0,1,1,1,1,2,0,1,0,0,0,0,
+2,3,2,3,3,0,0,2,1,0,2,1,0,0,0,0,2,3,0,2,0,0,0,0,0,1,0,0,2,0,1,2,
+2,1,2,1,2,2,1,1,1,2,1,1,1,0,1,2,2,1,1,1,1,1,0,1,1,1,0,0,1,2,0,0,
+3,3,2,2,3,0,2,3,1,1,2,0,0,0,1,0,0,2,0,2,0,0,0,1,0,1,0,1,2,0,2,2,
+1,1,1,1,2,1,0,1,2,2,2,1,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,1,0,0,
+2,3,2,3,3,0,0,3,0,1,1,0,1,0,0,0,2,2,1,2,0,0,0,0,0,0,0,0,2,0,1,2,
+2,2,1,1,1,1,1,2,2,2,1,0,2,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
+3,3,3,3,2,2,2,2,2,0,2,1,1,1,1,2,1,2,1,1,0,2,0,1,0,1,0,0,2,0,1,2,
+1,1,1,1,1,1,1,2,2,1,1,0,2,0,1,0,2,0,0,1,1,1,0,0,2,0,0,0,1,1,0,0,
+2,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,0,0,0,1,2,0,1,2,
+2,2,2,1,1,2,1,1,2,2,2,1,2,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,0,0,
+2,3,3,3,3,0,2,2,0,2,1,0,0,0,1,1,1,2,0,2,0,0,0,3,0,0,0,0,2,0,2,2,
+1,1,1,2,1,2,1,1,2,2,2,1,2,0,1,1,1,0,1,1,1,1,0,2,1,0,0,0,1,1,0,0,
+2,3,3,3,3,0,2,1,0,0,2,0,0,0,0,0,1,2,0,2,0,0,0,0,0,0,0,0,2,0,1,2,
+1,1,1,2,1,1,1,1,2,2,2,0,1,0,1,1,1,0,0,1,1,1,0,0,1,0,0,0,0,1,0,0,
+3,3,2,2,3,0,1,0,1,0,0,0,0,0,0,0,1,1,0,3,0,0,0,0,0,0,0,0,1,0,2,2,
+1,1,1,1,1,2,1,1,2,2,1,2,2,1,0,1,1,1,1,1,0,1,0,0,1,0,0,0,1,1,0,0,
+3,1,0,1,0,2,2,2,2,3,2,1,1,1,2,3,0,0,1,0,2,1,1,0,1,1,1,1,2,1,1,1,
+1,2,2,1,2,1,2,2,1,1,0,1,2,1,2,2,1,1,1,0,0,1,1,1,2,1,0,1,0,0,0,0,
+2,1,0,1,0,3,1,2,2,2,2,1,2,2,1,1,1,0,2,1,2,2,1,1,2,1,1,0,2,1,1,1,
+1,2,2,2,2,2,2,2,1,2,0,1,1,0,2,1,1,1,1,1,0,0,1,1,1,1,0,1,0,0,0,0,
+2,1,1,1,1,2,2,2,2,1,2,2,2,1,2,2,1,1,2,1,2,3,2,2,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,3,2,0,1,2,0,1,2,1,1,0,1,0,1,2,1,2,0,0,0,1,1,0,0,0,1,0,0,2,
+1,1,0,0,1,1,0,1,1,1,1,0,2,0,1,1,1,0,0,1,1,0,0,0,0,1,0,0,0,1,0,0,
+2,0,0,0,0,1,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,2,1,1,1,
+1,2,2,2,2,1,1,2,1,2,1,1,1,0,2,1,2,1,1,1,0,2,1,1,1,1,0,1,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+1,1,0,1,0,1,1,1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,3,2,0,0,0,0,1,0,0,0,0,0,0,1,1,0,2,0,0,0,0,0,0,0,0,1,0,1,2,
+1,1,1,1,1,1,0,0,2,2,2,2,2,0,1,1,0,1,1,1,1,1,0,0,1,0,0,0,1,1,0,1,
+2,3,1,2,1,0,1,1,0,2,2,2,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,1,0,1,2,
+1,1,1,1,2,1,1,1,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
+2,2,2,2,2,0,0,2,0,0,2,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,0,2,2,
+1,1,1,1,1,0,0,1,2,1,1,0,1,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,2,0,1,1,0,0,0,1,0,0,2,0,2,0,0,0,0,0,0,0,0,0,0,1,1,
+0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,3,2,0,0,1,0,0,1,0,0,0,0,0,0,1,0,2,0,0,0,1,0,0,0,0,0,0,0,2,
+1,1,0,0,1,0,0,0,1,1,0,0,1,0,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,1,2,2,2,1,2,1,2,2,1,1,2,1,1,1,0,1,1,1,1,2,0,1,0,1,1,1,1,0,1,1,
+1,1,2,1,1,1,1,1,1,0,0,1,2,1,1,1,1,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,
+1,0,0,1,3,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,1,0,0,1,0,2,0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0,0,0,2,0,0,1,
+0,2,0,1,0,0,1,1,2,0,1,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,1,1,0,2,1,0,1,1,1,0,0,1,0,2,0,1,0,0,0,0,0,0,0,0,0,1,
+0,1,0,0,1,0,0,0,1,1,0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,2,0,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
+0,1,0,1,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,0,1,2,1,1,1,1,1,1,2,2,1,0,0,1,0,1,0,0,0,0,1,1,1,1,0,0,0,
+1,1,2,1,1,1,1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,1,2,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+0,1,1,0,1,1,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
+1,0,1,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,1,0,2,0,0,2,0,1,0,0,1,0,0,1,
+1,1,0,0,1,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+1,1,1,1,1,1,1,2,0,0,0,0,0,0,2,1,0,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+)
+
+Latin5BulgarianModel = {
+  'char_to_order_map': Latin5_BulgarianCharToOrderMap,
+  'precedence_matrix': BulgarianLangModel,
+  'typical_positive_ratio': 0.969392,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-5",
+  'language': 'Bulgairan',
+}
+
+Win1251BulgarianModel = {
+  'char_to_order_map': win1251BulgarianCharToOrderMap,
+  'precedence_matrix': BulgarianLangModel,
+  'typical_positive_ratio': 0.969392,
+  'keep_english_letter': False,
+  'charset_name': "windows-1251",
+  'language': 'Bulgarian',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langcyrillicmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langcyrillicmodel.py
new file mode 100644
index 00000000..e5f9a1fd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langcyrillicmodel.py
@@ -0,0 +1,333 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# KOI8-R language model
+# Character Mapping Table:
+KOI8R_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,  # 80
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,  # 90
+223,224,225, 68,226,227,228,229,230,231,232,233,234,235,236,237,  # a0
+238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,  # b0
+ 27,  3, 21, 28, 13,  2, 39, 19, 26,  4, 23, 11,  8, 12,  5,  1,  # c0
+ 15, 16,  9,  7,  6, 14, 24, 10, 17, 18, 20, 25, 30, 29, 22, 54,  # d0
+ 59, 37, 44, 58, 41, 48, 53, 46, 55, 42, 60, 36, 49, 38, 31, 34,  # e0
+ 35, 43, 45, 32, 40, 52, 56, 33, 61, 62, 51, 57, 47, 63, 50, 70,  # f0
+)
+
+win1251_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+239,240,241,242,243,244,245,246, 68,247,248,249,250,251,252,253,
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+)
+
+latin5_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
+)
+
+macCyrillic_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+239,240,241,242,243,244,245,246,247,248,249,250,251,252, 68, 16,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27,255,
+)
+
+IBM855_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194, 68,195,196,197,198,199,200,201,202,203,204,205,
+206,207,208,209,210,211,212,213,214,215,216,217, 27, 59, 54, 70,
+  3, 37, 21, 44, 28, 58, 13, 41,  2, 48, 39, 53, 19, 46,218,219,
+220,221,222,223,224, 26, 55,  4, 42,225,226,227,228, 23, 60,229,
+230,231,232,233,234,235, 11, 36,236,237,238,239,240,241,242,243,
+  8, 49, 12, 38,  5, 31,  1, 34, 15,244,245,246,247, 35, 16,248,
+ 43,  9, 45,  7, 32,  6, 40, 14, 52, 24, 56, 10, 33, 17, 61,249,
+250, 18, 62, 20, 51, 25, 57, 30, 47, 29, 63, 22, 50,251,252,255,
+)
+
+IBM866_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 97.6601%
+# first 1024 sequences: 2.3389%
+# rest  sequences:      0.1237%
+# negative sequences:   0.0009%
+RussianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,3,3,3,3,1,3,3,3,2,3,2,3,3,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,2,2,2,2,2,0,0,2,
+3,3,3,2,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,2,3,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,2,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,2,3,3,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
+0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
+0,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,2,2,2,3,1,3,3,1,3,3,3,3,2,2,3,0,2,2,2,3,3,2,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,3,3,3,2,2,3,2,3,3,3,2,1,2,2,0,1,2,2,2,2,2,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,3,0,2,2,3,3,2,1,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,1,2,3,2,2,3,2,3,3,3,3,2,2,3,0,3,2,2,3,1,1,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,3,3,3,3,2,2,2,0,3,3,3,2,2,2,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,2,3,2,2,0,1,3,2,1,2,2,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,2,1,1,3,0,1,1,1,1,2,1,1,0,2,2,2,1,2,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,2,2,2,2,1,3,2,3,2,3,2,1,2,2,0,1,1,2,1,2,1,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,2,3,3,3,2,2,2,2,0,2,2,2,2,3,1,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,2,3,2,2,3,3,3,3,3,3,3,3,3,1,3,2,0,0,3,3,3,3,2,3,3,3,3,2,3,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,3,2,2,3,3,0,2,1,0,3,2,3,2,3,0,0,1,2,0,0,1,0,1,2,1,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,3,0,2,3,3,3,3,2,3,3,3,3,1,2,2,0,0,2,3,2,2,2,3,2,3,2,2,3,0,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,0,2,3,2,3,0,1,2,3,3,2,0,2,3,0,0,2,3,2,2,0,1,3,1,3,2,2,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,3,0,2,3,3,3,3,3,3,3,3,2,1,3,2,0,0,2,2,3,3,3,2,3,3,0,2,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,2,3,3,2,2,2,3,3,0,0,1,1,1,1,1,2,0,0,1,1,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,2,3,3,3,3,3,3,3,0,3,2,3,3,2,3,2,0,2,1,0,1,1,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,3,2,2,2,2,3,1,3,2,3,1,1,2,1,0,2,2,2,2,1,3,1,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+2,2,3,3,3,3,3,1,2,2,1,3,1,0,3,0,0,3,0,0,0,1,1,0,1,2,1,0,0,0,0,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,2,1,1,3,3,3,2,2,1,2,2,3,1,1,2,0,0,2,2,1,3,0,0,2,1,1,2,1,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,3,3,3,1,2,2,2,1,2,1,3,3,1,1,2,1,2,1,2,2,0,2,0,0,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,3,2,1,3,2,2,3,2,0,3,2,0,3,0,1,0,1,1,0,0,1,1,1,1,0,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,3,3,3,2,2,2,3,3,1,2,1,2,1,0,1,0,1,1,0,1,0,0,2,1,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,1,1,2,1,2,3,3,2,2,1,2,2,3,0,2,1,0,0,2,2,3,2,1,2,2,2,2,2,3,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,1,1,0,1,1,2,2,1,1,3,0,0,1,3,1,1,1,0,0,0,1,0,1,1,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,3,3,3,2,0,0,0,2,1,0,1,0,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,0,2,3,2,2,2,1,2,2,2,1,2,1,0,0,1,1,1,0,2,0,1,1,1,0,0,1,1,
+1,0,0,0,0,0,1,2,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,0,0,0,0,1,0,0,0,0,3,0,1,2,1,0,0,0,0,0,0,0,1,1,0,0,1,1,
+1,0,1,0,1,2,0,0,1,1,2,1,0,1,1,1,1,0,1,1,1,1,0,1,0,0,1,0,0,1,1,0,
+2,2,3,2,2,2,3,1,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,0,1,0,1,1,1,0,2,1,
+1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,0,1,1,0,
+3,3,3,2,2,2,2,3,2,2,1,1,2,2,2,2,1,1,3,1,2,1,2,0,0,1,1,0,1,0,2,1,
+1,1,1,1,1,2,1,0,1,1,1,1,0,1,0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,1,1,0,
+2,0,0,1,0,3,2,2,2,2,1,2,1,2,1,2,0,0,0,2,1,2,2,1,1,2,2,0,1,1,0,2,
+1,1,1,1,1,0,1,1,1,2,1,1,1,2,1,0,1,2,1,1,1,1,0,1,1,1,0,0,1,0,0,1,
+1,3,2,2,2,1,1,1,2,3,0,0,0,0,2,0,2,2,1,0,0,0,0,0,0,1,0,0,0,0,1,1,
+1,0,1,1,0,1,0,1,1,0,1,1,0,2,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
+2,3,2,3,2,1,2,2,2,2,1,0,0,0,2,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,2,1,
+1,1,2,1,0,2,0,0,1,0,1,0,0,1,0,0,1,1,0,1,1,0,0,0,0,0,1,0,0,0,0,0,
+3,0,0,1,0,2,2,2,3,2,2,2,2,2,2,2,0,0,0,2,1,2,1,1,1,2,2,0,0,0,1,2,
+1,1,1,1,1,0,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,1,
+2,3,2,3,3,2,0,1,1,1,0,0,1,0,2,0,1,1,3,1,0,0,0,0,0,0,0,1,0,0,2,1,
+1,1,1,1,1,1,1,0,1,0,1,1,1,1,0,1,1,1,0,0,1,1,0,1,0,0,0,0,0,0,1,0,
+2,3,3,3,3,1,2,2,2,2,0,1,1,0,2,1,1,1,2,1,0,1,1,0,0,1,0,1,0,0,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,2,0,0,1,1,2,2,1,0,0,2,0,1,1,3,0,0,1,0,0,0,0,0,1,0,1,2,1,
+1,1,2,0,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,0,1,0,0,0,0,0,0,1,0,1,1,0,
+1,3,2,3,2,1,0,0,2,2,2,0,1,0,2,0,1,1,1,0,1,0,0,0,3,0,1,1,0,0,2,1,
+1,1,1,0,1,1,0,0,0,0,1,1,0,1,0,0,2,1,1,0,1,0,0,0,1,0,1,0,0,1,1,0,
+3,1,2,1,1,2,2,2,2,2,2,1,2,2,1,1,0,0,0,2,2,2,0,0,0,1,2,1,0,1,0,1,
+2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,1,1,1,0,1,0,1,1,0,1,1,1,0,0,1,
+3,0,0,0,0,2,0,1,1,1,1,1,1,1,0,1,0,0,0,1,1,1,0,1,0,1,1,0,0,1,0,1,
+1,1,0,0,1,0,0,0,1,0,1,1,0,0,1,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,
+1,3,3,2,2,0,0,0,2,2,0,0,0,1,2,0,1,1,2,0,0,0,0,0,0,0,0,1,0,0,2,1,
+0,1,1,0,0,1,1,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+2,3,2,3,2,0,0,0,0,1,1,0,0,0,2,0,2,0,2,0,0,0,0,0,1,0,0,1,0,0,1,1,
+1,1,2,0,1,2,1,0,1,1,2,1,1,1,1,1,2,1,1,0,1,0,0,1,1,1,1,1,0,1,1,0,
+1,3,2,2,2,1,0,0,2,2,1,0,1,2,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,1,
+0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,0,2,3,1,2,2,2,2,2,2,1,1,0,0,0,1,0,1,0,2,1,1,1,0,0,0,0,1,
+1,1,0,1,1,0,1,1,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+2,0,2,0,0,1,0,3,2,1,2,1,2,2,0,1,0,0,0,2,1,0,0,2,1,1,1,1,0,2,0,2,
+2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,0,1,
+1,2,2,2,2,1,0,0,1,0,0,0,0,0,2,0,1,1,1,1,0,0,0,0,1,0,1,2,0,0,2,0,
+1,0,1,1,1,2,1,0,1,0,1,1,0,0,1,0,1,1,1,0,1,0,0,0,1,0,0,1,0,1,1,0,
+2,1,2,2,2,0,3,0,1,1,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,0,1,1,1,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,
+1,2,2,3,2,2,0,0,1,1,2,0,1,2,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,
+0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
+2,2,1,1,2,1,2,2,2,2,2,1,2,2,0,1,0,0,0,1,2,2,2,1,2,1,1,1,1,1,2,1,
+1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,0,1,
+1,2,2,2,2,0,1,0,2,2,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
+0,0,1,0,0,1,0,0,0,0,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,0,2,2,2,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
+0,1,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,0,0,1,0,0,1,1,2,0,0,0,0,1,0,1,0,0,1,0,0,2,0,0,0,1,
+0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,1,1,2,0,2,1,1,1,1,0,2,2,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,
+0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,0,2,1,2,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,
+0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+1,0,0,0,0,2,0,1,2,1,0,1,1,1,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,1,
+0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,
+2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,1,0,1,0,1,0,0,1,1,1,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,0,1,1,0,1,0,1,0,0,0,0,1,1,0,1,1,0,0,0,0,0,1,0,1,1,0,1,0,0,0,
+0,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
+)
+
+Koi8rModel = {
+  'char_to_order_map': KOI8R_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "KOI8-R",
+  'language': 'Russian',
+}
+
+Win1251CyrillicModel = {
+  'char_to_order_map': win1251_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "windows-1251",
+  'language': 'Russian',
+}
+
+Latin5CyrillicModel = {
+  'char_to_order_map': latin5_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-5",
+  'language': 'Russian',
+}
+
+MacCyrillicModel = {
+  'char_to_order_map': macCyrillic_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "MacCyrillic",
+  'language': 'Russian',
+}
+
+Ibm866Model = {
+  'char_to_order_map': IBM866_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "IBM866",
+  'language': 'Russian',
+}
+
+Ibm855Model = {
+  'char_to_order_map': IBM855_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "IBM855",
+  'language': 'Russian',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langgreekmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langgreekmodel.py
new file mode 100644
index 00000000..53322216
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langgreekmodel.py
@@ -0,0 +1,225 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin7_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
+ 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
+253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
+ 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
+253,233, 90,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
+253,253,253,253,247,248, 61, 36, 46, 71, 73,253, 54,253,108,123,  # b0
+110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
+ 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
+124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
+  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
+)
+
+win1253_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
+ 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
+253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
+ 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
+253,233, 61,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
+253,253,253,253,247,253,253, 36, 46, 71, 73,253, 54,253,108,123,  # b0
+110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
+ 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
+124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
+  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 98.2851%
+# first 1024 sequences:1.7001%
+# rest  sequences:     0.0359%
+# negative sequences:  0.0148%
+GreekLangModel = (
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,2,2,3,3,3,3,3,3,3,3,1,3,3,3,0,2,2,3,3,0,3,0,3,2,0,3,3,3,0,
+3,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,0,3,3,0,3,2,3,3,0,3,2,3,3,3,0,0,3,0,3,0,3,3,2,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,2,3,2,2,3,3,3,3,3,3,3,3,0,3,3,3,3,0,2,3,3,0,3,3,3,3,2,3,3,3,0,
+2,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,2,1,3,3,3,3,2,3,3,2,3,3,2,0,
+0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,2,3,3,0,
+2,0,1,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,3,0,0,0,0,3,3,0,3,1,3,3,3,0,3,3,0,3,3,3,3,0,0,0,0,
+2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,0,3,0,3,3,3,3,3,0,3,2,2,2,3,0,2,3,3,3,3,3,2,3,3,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,3,2,2,2,3,3,3,3,0,3,1,3,3,3,3,2,3,3,3,3,3,3,3,2,2,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,3,0,0,0,3,3,2,3,3,3,3,3,0,0,3,2,3,0,2,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,3,0,0,3,3,0,2,3,0,3,0,3,3,3,0,0,3,0,3,0,2,2,3,3,0,0,
+0,0,1,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,3,2,3,3,3,3,0,3,3,3,3,3,0,3,3,2,3,2,3,3,2,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,2,3,2,3,3,3,3,3,3,0,2,3,2,3,2,2,2,3,2,3,3,2,3,0,2,2,2,3,0,
+2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,0,3,3,3,2,3,3,0,0,3,0,3,0,0,0,3,2,0,3,0,3,0,0,2,0,2,0,
+0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,0,0,0,3,3,0,3,3,3,0,0,1,2,3,0,
+3,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,0,3,2,2,3,3,0,3,3,3,3,3,2,1,3,0,3,2,3,3,2,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,3,0,2,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,3,0,3,2,3,0,0,3,3,3,0,
+3,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,2,0,3,2,3,0,0,3,2,3,0,
+2,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,1,2,2,3,3,3,3,3,3,0,2,3,0,3,0,0,0,3,3,0,3,0,2,0,0,2,3,1,0,
+2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,3,0,3,0,3,3,2,3,0,3,3,3,3,3,3,0,3,3,3,0,2,3,0,0,3,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,0,0,3,0,0,0,3,3,0,3,0,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,0,3,3,3,3,3,3,0,0,3,0,2,0,0,0,3,3,0,3,0,3,0,0,2,0,2,0,
+0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,3,0,3,0,2,0,3,2,0,3,2,3,2,3,0,0,3,2,3,2,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,2,3,3,3,3,3,0,0,0,3,0,2,1,0,0,3,2,2,2,0,3,0,0,2,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,2,0,3,0,3,0,3,3,0,2,1,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,3,0,3,3,3,3,3,3,0,2,3,0,3,0,0,0,2,1,0,2,2,3,0,0,2,2,2,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,2,3,3,3,2,3,0,0,1,3,0,2,0,0,0,0,3,0,1,0,2,0,0,1,1,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,1,0,3,0,0,0,3,2,0,3,2,3,3,3,0,0,3,0,3,2,2,2,1,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,0,0,3,0,0,0,0,2,0,2,3,3,2,2,2,2,3,0,2,0,2,2,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,2,0,0,0,0,0,0,2,3,0,2,0,2,3,2,0,0,3,0,3,0,3,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,3,2,3,3,2,2,3,0,2,0,3,0,0,0,2,0,0,0,0,1,2,0,2,0,2,0,
+0,2,0,2,0,2,2,0,0,1,0,2,2,2,0,2,2,2,0,2,2,2,0,0,2,0,0,1,0,0,0,0,
+0,2,0,3,3,2,0,0,0,0,0,0,1,3,0,2,0,2,2,2,0,0,2,0,3,0,0,2,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,2,3,2,0,2,2,0,2,0,2,2,0,2,0,2,2,2,0,0,0,0,0,0,2,3,0,0,0,2,
+0,1,2,0,0,0,0,2,2,0,0,0,2,1,0,2,2,0,0,0,0,0,0,1,0,2,0,0,0,0,0,0,
+0,0,2,1,0,2,3,2,2,3,2,3,2,0,0,3,3,3,0,0,3,2,0,0,0,1,1,0,2,0,2,2,
+0,2,0,2,0,2,2,0,0,2,0,2,2,2,0,2,2,2,2,0,0,2,0,0,0,2,0,1,0,0,0,0,
+0,3,0,3,3,2,2,0,3,0,0,0,2,2,0,2,2,2,1,2,0,0,1,2,2,0,0,3,0,0,0,2,
+0,1,2,0,0,0,1,2,0,0,0,0,0,0,0,2,2,0,1,0,0,2,0,0,0,2,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,2,2,0,0,0,2,0,2,3,3,0,2,0,0,0,0,0,0,2,2,2,0,2,2,0,2,0,2,
+0,2,2,0,0,2,2,2,2,1,0,0,2,2,0,2,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,
+0,2,0,3,2,3,0,0,0,3,0,0,2,2,0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,0,2,
+0,0,2,2,0,0,2,2,2,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,3,2,0,2,2,2,2,2,0,0,0,2,0,0,0,0,2,0,1,0,0,2,0,1,0,0,0,
+0,2,2,2,0,2,2,0,1,2,0,2,2,2,0,2,2,2,2,1,2,2,0,0,2,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,2,0,2,0,2,2,0,0,0,0,1,2,1,0,0,2,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,3,2,3,0,0,2,0,0,0,2,2,0,2,0,0,0,1,0,0,2,0,2,0,2,2,0,0,0,0,
+0,0,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,
+0,2,2,3,2,2,0,0,0,0,0,0,1,3,0,2,0,2,2,0,0,0,1,0,2,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,0,2,0,3,2,0,2,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,2,0,0,0,0,1,1,0,0,2,1,2,0,2,2,0,1,0,0,1,0,0,0,2,0,0,0,0,0,0,
+0,3,0,2,2,2,0,0,2,0,0,0,2,0,0,0,2,3,0,2,0,0,0,0,0,0,2,2,0,0,0,2,
+0,1,2,0,0,0,1,2,2,1,0,0,0,2,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,1,2,0,2,2,0,2,0,0,2,0,0,0,0,1,2,1,0,2,1,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,0,3,1,2,2,0,2,0,0,0,0,2,0,0,0,2,0,0,3,0,0,0,0,2,2,2,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,1,0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,2,
+0,2,2,0,0,2,2,2,2,2,0,1,2,0,0,0,2,2,0,1,0,2,0,0,2,2,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,0,0,0,0,2,0,2,0,0,0,0,2,
+0,1,2,0,0,0,0,2,2,1,0,1,0,1,0,2,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,2,0,0,2,2,0,0,0,0,1,0,0,0,0,0,0,2,
+0,2,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,
+0,2,2,2,2,0,0,0,3,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,1,
+0,0,2,0,0,0,0,1,2,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,2,2,2,0,0,0,2,0,0,0,0,0,0,0,0,2,
+0,0,1,0,0,0,0,2,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,3,0,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,2,
+0,0,2,0,0,0,0,2,2,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,0,2,2,1,0,0,0,0,0,0,2,0,0,2,0,2,2,2,0,0,0,0,0,0,2,0,0,0,0,2,
+0,0,2,0,0,2,0,2,2,0,0,0,0,2,0,2,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,
+0,0,3,0,0,0,2,2,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0,0,
+0,2,2,2,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,
+0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,2,0,0,0,2,0,0,0,0,0,1,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,2,0,0,0,
+0,2,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,2,0,2,0,0,0,
+0,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin7GreekModel = {
+  'char_to_order_map': Latin7_char_to_order_map,
+  'precedence_matrix': GreekLangModel,
+  'typical_positive_ratio': 0.982851,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-7",
+  'language': 'Greek',
+}
+
+Win1253GreekModel = {
+  'char_to_order_map': win1253_char_to_order_map,
+  'precedence_matrix': GreekLangModel,
+  'typical_positive_ratio': 0.982851,
+  'keep_english_letter': False,
+  'charset_name': "windows-1253",
+  'language': 'Greek',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhebrewmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhebrewmodel.py
new file mode 100644
index 00000000..58f4c875
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhebrewmodel.py
@@ -0,0 +1,200 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+#          Simon Montagu
+# Portions created by the Initial Developer are Copyright (C) 2005
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Shoshannah Forbes - original C code (?)
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Windows-1255 language model
+# Character Mapping Table:
+WIN1255_CHAR_TO_ORDER_MAP = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 69, 91, 79, 80, 92, 89, 97, 90, 68,111,112, 82, 73, 95, 85,  # 40
+ 78,121, 86, 71, 67,102,107, 84,114,103,115,253,253,253,253,253,  # 50
+253, 50, 74, 60, 61, 42, 76, 70, 64, 53,105, 93, 56, 65, 54, 49,  # 60
+ 66,110, 51, 43, 44, 63, 81, 77, 98, 75,108,253,253,253,253,253,  # 70
+124,202,203,204,205, 40, 58,206,207,208,209,210,211,212,213,214,
+215, 83, 52, 47, 46, 72, 32, 94,216,113,217,109,218,219,220,221,
+ 34,116,222,118,100,223,224,117,119,104,125,225,226, 87, 99,227,
+106,122,123,228, 55,229,230,101,231,232,120,233, 48, 39, 57,234,
+ 30, 59, 41, 88, 33, 37, 36, 31, 29, 35,235, 62, 28,236,126,237,
+238, 38, 45,239,240,241,242,243,127,244,245,246,247,248,249,250,
+  9,  8, 20, 16,  3,  2, 24, 14, 22,  1, 25, 15,  4, 11,  6, 23,
+ 12, 19, 13, 26, 18, 27, 21, 17,  7, 10,  5,251,252,128, 96,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 98.4004%
+# first 1024 sequences: 1.5981%
+# rest  sequences:      0.087%
+# negative sequences:   0.0015%
+HEBREW_LANG_MODEL = (
+0,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,3,2,1,2,0,1,0,0,
+3,0,3,1,0,0,1,3,2,0,1,1,2,0,2,2,2,1,1,1,1,2,1,1,1,2,0,0,2,2,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,
+1,2,1,2,1,2,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,
+1,2,1,3,1,1,0,0,2,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,1,2,2,1,3,
+1,2,1,1,2,2,0,0,2,2,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,0,1,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,2,2,2,3,2,
+1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,3,2,2,3,2,2,2,1,2,2,2,2,
+1,2,1,1,2,2,0,1,2,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,0,2,2,2,2,2,
+0,2,0,2,2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,0,2,2,2,
+0,2,1,2,2,2,0,0,2,1,0,0,0,0,1,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,2,1,2,3,2,2,2,
+1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,0,
+3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,2,0,2,
+0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,2,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,2,2,3,2,1,2,1,1,1,
+0,1,1,1,1,1,3,0,1,0,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
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+3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,2,2,3,3,3,3,1,3,2,2,2,
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+3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,2,3,2,2,2,1,2,2,0,2,2,2,2,
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+3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,1,3,2,3,3,2,3,3,2,2,1,2,2,2,2,2,2,
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+3,3,3,3,3,3,2,3,2,3,3,2,3,3,3,3,2,3,2,3,3,3,3,3,2,2,2,2,2,2,2,1,
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+3,3,3,3,3,3,3,3,3,2,1,2,3,3,3,3,3,3,3,2,3,2,3,2,1,2,3,0,2,1,2,2,
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+3,3,3,3,3,3,3,3,3,2,3,3,3,3,2,1,3,1,2,2,2,1,2,3,3,1,2,1,2,2,2,2,
+0,1,1,1,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,0,2,3,3,3,1,3,3,3,1,2,2,2,2,1,1,2,2,2,2,2,2,
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+3,3,3,3,3,3,2,3,3,3,2,2,3,3,3,2,1,2,3,2,3,2,2,2,2,1,2,1,1,1,2,2,
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+3,3,3,3,3,2,3,3,2,3,1,2,2,2,2,3,2,3,1,1,2,2,1,2,2,1,1,0,2,2,2,2,
+0,1,0,1,2,2,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,0,0,1,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,2,0,
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+3,0,1,0,1,0,1,1,0,1,1,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
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+3,2,2,1,2,2,2,2,2,2,2,1,2,2,1,2,2,1,1,1,1,1,1,1,1,2,1,1,0,3,3,3,
+0,3,0,2,2,2,2,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+2,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,2,1,2,2,2,1,1,1,2,0,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,0,2,2,0,0,0,0,0,0,
+0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,1,0,2,1,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,3,1,1,2,2,2,2,2,1,2,2,2,1,1,2,2,2,2,2,2,2,1,2,2,1,0,1,1,1,1,0,
+0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,1,1,1,1,2,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
+0,0,2,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,
+2,1,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,1,2,1,2,1,1,1,1,0,0,0,0,
+0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,1,2,2,2,2,2,2,2,2,2,2,1,2,1,2,1,1,2,1,1,1,2,1,2,1,2,0,1,0,1,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,1,2,2,2,1,2,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,2,1,2,1,1,0,1,0,1,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,
+0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,1,1,1,0,1,0,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,0,
+0,1,1,1,2,1,2,2,2,0,2,0,2,0,1,1,2,1,1,1,1,2,1,0,1,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,1,0,0,0,0,0,1,0,1,2,2,0,1,0,0,1,1,2,2,1,2,0,2,0,0,0,1,2,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,2,1,2,0,2,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,1,2,2,0,0,1,0,0,0,1,0,0,1,
+1,1,2,1,0,1,1,1,0,1,0,1,1,1,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,2,1,
+0,2,0,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,0,0,1,0,1,1,1,1,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,1,0,0,0,1,1,0,1,
+2,0,1,0,1,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,1,0,1,0,0,1,1,2,1,1,2,0,1,0,0,0,1,1,0,1,
+1,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,0,0,2,1,1,2,0,2,0,0,0,1,1,0,1,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,2,2,1,2,1,1,0,1,0,0,0,1,1,0,1,
+2,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,1,0,1,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,2,1,1,1,0,2,1,1,0,0,0,2,1,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,0,2,1,1,0,1,0,0,0,1,1,0,1,
+2,2,1,1,1,0,1,1,0,1,1,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,0,1,2,1,0,2,0,0,0,1,1,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,
+0,1,0,0,2,0,2,1,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,1,0,1,0,0,1,0,0,0,1,0,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,0,0,2,1,1,1,1,1,0,1,0,0,0,0,1,0,1,
+0,1,1,1,2,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,1,0,0,0,0,0,1,1,1,1,1,0,1,0,0,0,1,1,0,0,
+)
+
+Win1255HebrewModel = {
+  'char_to_order_map': WIN1255_CHAR_TO_ORDER_MAP,
+  'precedence_matrix': HEBREW_LANG_MODEL,
+  'typical_positive_ratio': 0.984004,
+  'keep_english_letter': False,
+  'charset_name': "windows-1255",
+  'language': 'Hebrew',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhungarianmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhungarianmodel.py
new file mode 100644
index 00000000..bb7c095e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langhungarianmodel.py
@@ -0,0 +1,225 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin2_HungarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
+ 46, 71, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
+253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
+ 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
+159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,
+175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,
+191,192,193,194,195,196,197, 75,198,199,200,201,202,203,204,205,
+ 79,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
+221, 51, 81,222, 78,223,224,225,226, 44,227,228,229, 61,230,231,
+232,233,234, 58,235, 66, 59,236,237,238, 60, 69, 63,239,240,241,
+ 82, 14, 74,242, 70, 80,243, 72,244, 15, 83, 77, 84, 30, 76, 85,
+245,246,247, 25, 73, 42, 24,248,249,250, 31, 56, 29,251,252,253,
+)
+
+win1250HungarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
+ 46, 72, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
+253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
+ 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
+161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,
+177,178,179,180, 78,181, 69,182,183,184,185,186,187,188,189,190,
+191,192,193,194,195,196,197, 76,198,199,200,201,202,203,204,205,
+ 81,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
+221, 51, 83,222, 80,223,224,225,226, 44,227,228,229, 61,230,231,
+232,233,234, 58,235, 66, 59,236,237,238, 60, 70, 63,239,240,241,
+ 84, 14, 75,242, 71, 82,243, 73,244, 15, 85, 79, 86, 30, 77, 87,
+245,246,247, 25, 74, 42, 24,248,249,250, 31, 56, 29,251,252,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 94.7368%
+# first 1024 sequences:5.2623%
+# rest  sequences:     0.8894%
+# negative sequences:  0.0009%
+HungarianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,2,3,3,1,1,2,2,2,2,2,1,2,
+3,2,2,3,3,3,3,3,2,3,3,3,3,3,3,1,2,3,3,3,3,2,3,3,1,1,3,3,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
+3,2,1,3,3,3,3,3,2,3,3,3,3,3,1,1,2,3,3,3,3,3,3,3,1,1,3,2,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,1,1,2,3,3,3,1,3,3,3,3,3,1,3,3,2,2,0,3,2,3,
+0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,3,3,2,3,3,2,2,3,2,3,2,0,3,2,2,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
+3,3,3,3,3,3,2,3,3,3,3,3,2,3,3,3,1,2,3,2,2,3,1,2,3,3,2,2,0,3,3,3,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,3,2,3,3,3,3,2,3,3,3,3,0,2,3,2,
+0,0,0,1,1,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,1,1,1,3,3,2,1,3,2,2,3,2,1,3,2,2,1,0,3,3,1,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,2,2,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,3,2,2,3,1,1,3,2,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,1,3,3,3,3,3,2,2,1,3,3,3,0,1,1,2,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,2,0,3,2,3,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,1,0,
+3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,1,3,2,2,2,3,1,1,3,3,1,1,0,3,3,2,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,2,3,3,3,3,3,1,2,3,2,2,0,2,2,2,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,2,2,2,3,1,3,3,2,2,1,3,3,3,1,1,3,1,2,3,2,3,2,2,2,1,0,2,2,2,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
+3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,2,2,3,2,1,0,3,2,0,1,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,1,0,3,3,3,3,0,2,3,0,0,2,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,2,3,3,2,2,2,2,3,3,0,1,2,3,2,3,2,2,3,2,1,2,0,2,2,2,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
+3,3,3,3,3,3,1,2,3,3,3,2,1,2,3,3,2,2,2,3,2,3,3,1,3,3,1,1,0,2,3,2,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,1,2,2,2,2,3,3,3,1,1,1,3,3,1,1,3,1,1,3,2,1,2,3,1,1,0,2,2,2,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,2,1,2,1,1,3,3,1,1,1,1,3,3,1,1,2,2,1,2,1,1,2,2,1,1,0,2,2,1,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,1,1,2,1,1,3,3,1,0,1,1,3,3,2,0,1,1,2,3,1,0,2,2,1,0,0,1,3,2,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,2,1,3,3,3,3,3,1,2,3,2,3,3,2,1,1,3,2,3,2,1,2,2,0,1,2,1,0,0,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,2,2,2,2,3,1,2,2,1,1,3,3,0,3,2,1,2,3,2,1,3,3,1,1,0,2,1,3,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,3,3,2,2,2,3,2,3,3,3,2,1,1,3,3,1,1,1,2,2,3,2,3,2,2,2,1,0,2,2,1,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+1,0,0,3,3,3,3,3,0,0,3,3,2,3,0,0,0,2,3,3,1,0,1,2,0,0,1,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,2,3,3,3,3,3,1,2,3,3,2,2,1,1,0,3,3,2,2,1,2,2,1,0,2,2,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,2,1,3,1,2,3,3,2,2,1,1,2,2,1,1,1,1,3,2,1,1,1,1,2,1,0,1,2,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+2,3,3,1,1,1,1,1,3,3,3,0,1,1,3,3,1,1,1,1,1,2,2,0,3,1,1,2,0,2,1,1,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
+3,1,0,1,2,1,2,2,0,1,2,3,1,2,0,0,0,2,1,1,1,1,1,2,0,0,1,1,0,0,0,0,
+1,2,1,2,2,2,1,2,1,2,0,2,0,2,2,1,1,2,1,1,2,1,1,1,0,1,0,0,0,1,1,0,
+1,1,1,2,3,2,3,3,0,1,2,2,3,1,0,1,0,2,1,2,2,0,1,1,0,0,1,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,3,3,2,2,1,0,0,3,2,3,2,0,0,0,1,1,3,0,0,1,1,0,0,2,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,2,2,3,3,1,0,1,3,2,3,1,1,1,0,1,1,1,1,1,3,1,0,0,2,2,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,1,2,2,2,1,0,1,2,3,3,2,0,0,0,2,1,1,1,2,1,1,1,0,1,1,1,0,0,0,
+1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,2,1,1,1,1,1,1,0,1,1,1,0,0,1,1,
+3,2,2,1,0,0,1,1,2,2,0,3,0,1,2,1,1,0,0,1,1,1,0,1,1,1,1,0,2,1,1,1,
+2,2,1,1,1,2,1,2,1,1,1,1,1,1,1,2,1,1,1,2,3,1,1,1,1,1,1,1,1,1,0,1,
+2,3,3,0,1,0,0,0,3,3,1,0,0,1,2,2,1,0,0,0,0,2,0,0,1,1,1,0,2,1,1,1,
+2,1,1,1,1,1,1,2,1,1,0,1,1,0,1,1,1,0,1,2,1,1,0,1,1,1,1,1,1,1,0,1,
+2,3,3,0,1,0,0,0,2,2,0,0,0,0,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,1,0,
+2,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
+3,2,2,0,1,0,1,0,2,3,2,0,0,1,2,2,1,0,0,1,1,1,0,0,2,1,0,1,2,2,1,1,
+2,1,1,1,1,1,1,2,1,1,1,1,1,1,0,2,1,0,1,1,0,1,1,1,0,1,1,2,1,1,0,1,
+2,2,2,0,0,1,0,0,2,2,1,1,0,0,2,1,1,0,0,0,1,2,0,0,2,1,0,0,2,1,1,1,
+2,1,1,1,1,2,1,2,1,1,1,2,2,1,1,2,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,
+1,2,3,0,0,0,1,0,3,2,1,0,0,1,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,2,1,
+1,1,0,0,0,1,0,1,1,1,1,1,2,0,0,1,0,0,0,2,0,0,1,1,1,1,1,1,1,1,0,1,
+3,0,0,2,1,2,2,1,0,0,2,1,2,2,0,0,0,2,1,1,1,0,1,1,0,0,1,1,2,0,0,0,
+1,2,1,2,2,1,1,2,1,2,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,0,0,1,
+1,3,2,0,0,0,1,0,2,2,2,0,0,0,2,2,1,0,0,0,0,3,1,1,1,1,0,0,2,1,1,1,
+2,1,0,1,1,1,0,1,1,1,1,1,1,1,0,2,1,0,0,1,0,1,1,0,1,1,1,1,1,1,0,1,
+2,3,2,0,0,0,1,0,2,2,0,0,0,0,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,1,0,
+2,1,1,1,1,2,1,2,1,2,0,1,1,1,0,2,1,1,1,2,1,1,1,1,0,1,1,1,1,1,0,1,
+3,1,1,2,2,2,3,2,1,1,2,2,1,1,0,1,0,2,2,1,1,1,1,1,0,0,1,1,0,1,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,0,0,0,0,0,2,2,0,0,0,0,2,2,1,0,0,0,1,1,0,0,1,2,0,0,2,1,1,1,
+2,2,1,1,1,2,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,1,1,0,1,2,1,1,1,0,1,
+1,0,0,1,2,3,2,1,0,0,2,0,1,1,0,0,0,1,1,1,1,0,1,1,0,0,1,0,0,0,0,0,
+1,2,1,2,1,2,1,1,1,2,0,2,1,1,1,0,1,2,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
+2,3,2,0,0,0,0,0,1,1,2,1,0,0,1,1,1,0,0,0,0,2,0,0,1,1,0,0,2,1,1,1,
+2,1,1,1,1,1,1,2,1,0,1,1,1,1,0,2,1,1,1,1,1,1,0,1,0,1,1,1,1,1,0,1,
+1,2,2,0,1,1,1,0,2,2,2,0,0,0,3,2,1,0,0,0,1,1,0,0,1,1,0,1,1,1,0,0,
+1,1,0,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,0,0,1,1,1,0,1,0,1,
+2,1,0,2,1,1,2,2,1,1,2,1,1,1,0,0,0,1,1,0,1,1,1,1,0,0,1,1,1,0,0,0,
+1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,1,0,
+1,2,3,0,0,0,1,0,2,2,0,0,0,0,2,2,0,0,0,0,0,1,0,0,1,0,0,0,2,0,1,0,
+2,1,1,1,1,1,0,2,0,0,0,1,2,1,1,1,1,0,1,2,0,1,0,1,0,1,1,1,0,1,0,1,
+2,2,2,0,0,0,1,0,2,1,2,0,0,0,1,1,2,0,0,0,0,1,0,0,1,1,0,0,2,1,0,1,
+2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
+1,2,2,0,0,0,1,0,2,2,2,0,0,0,1,1,0,0,0,0,0,1,1,0,2,0,0,1,1,1,0,1,
+1,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,0,0,1,
+1,0,0,1,0,1,2,1,0,0,1,1,1,2,0,0,0,1,1,0,1,0,1,1,0,0,1,0,0,0,0,0,
+0,2,1,2,1,1,1,1,1,2,0,2,0,1,1,0,1,2,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
+2,1,1,0,1,2,0,0,1,1,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,2,1,0,1,
+2,2,1,1,1,1,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,0,1,0,1,1,1,1,1,0,1,
+1,2,2,0,0,0,0,0,1,1,0,0,0,0,2,1,0,0,0,0,0,2,0,0,2,2,0,0,2,0,0,1,
+2,1,1,1,1,1,1,1,0,1,1,0,1,1,0,1,0,0,0,1,1,1,1,0,0,1,1,1,1,0,0,1,
+1,1,2,0,0,3,1,0,2,1,1,1,0,0,1,1,1,0,0,0,1,1,0,0,0,1,0,0,1,0,1,0,
+1,2,1,0,1,1,1,2,1,1,0,1,1,1,1,1,0,0,0,1,1,1,1,1,0,1,0,0,0,1,0,0,
+2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,2,0,0,0,
+2,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,1,0,1,
+2,1,1,1,2,1,1,1,0,1,1,2,1,0,0,0,0,1,1,1,1,0,1,0,0,0,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,0,1,1,1,1,1,0,0,1,1,2,1,0,0,0,1,1,0,0,0,1,1,0,0,1,0,1,0,0,0,
+1,2,1,1,1,1,1,1,1,1,0,1,0,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
+2,0,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,1,1,1,2,0,0,1,0,0,1,0,1,0,0,0,
+0,1,1,1,1,1,1,1,1,2,0,1,1,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,1,1,0,0,2,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,
+0,1,1,1,1,1,1,0,1,1,0,1,0,1,1,0,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+0,1,1,1,1,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
+0,0,0,1,0,0,0,0,0,0,1,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,1,1,0,1,0,0,1,1,0,1,0,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
+2,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,1,0,0,0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,1,1,1,1,1,0,1,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin2HungarianModel = {
+  'char_to_order_map': Latin2_HungarianCharToOrderMap,
+  'precedence_matrix': HungarianLangModel,
+  'typical_positive_ratio': 0.947368,
+  'keep_english_letter': True,
+  'charset_name': "ISO-8859-2",
+  'language': 'Hungarian',
+}
+
+Win1250HungarianModel = {
+  'char_to_order_map': win1250HungarianCharToOrderMap,
+  'precedence_matrix': HungarianLangModel,
+  'typical_positive_ratio': 0.947368,
+  'keep_english_letter': True,
+  'charset_name': "windows-1250",
+  'language': 'Hungarian',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langthaimodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langthaimodel.py
new file mode 100644
index 00000000..15f94c2d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langthaimodel.py
@@ -0,0 +1,199 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# The following result for thai was collected from a limited sample (1M).
+
+# Character Mapping Table:
+TIS620CharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,182,106,107,100,183,184,185,101, 94,186,187,108,109,110,111,  # 40
+188,189,190, 89, 95,112,113,191,192,193,194,253,253,253,253,253,  # 50
+253, 64, 72, 73,114, 74,115,116,102, 81,201,117, 90,103, 78, 82,  # 60
+ 96,202, 91, 79, 84,104,105, 97, 98, 92,203,253,253,253,253,253,  # 70
+209,210,211,212,213, 88,214,215,216,217,218,219,220,118,221,222,
+223,224, 99, 85, 83,225,226,227,228,229,230,231,232,233,234,235,
+236,  5, 30,237, 24,238, 75,  8, 26, 52, 34, 51,119, 47, 58, 57,
+ 49, 53, 55, 43, 20, 19, 44, 14, 48,  3, 17, 25, 39, 62, 31, 54,
+ 45,  9, 16,  2, 61, 15,239, 12, 42, 46, 18, 21, 76,  4, 66, 63,
+ 22, 10,  1, 36, 23, 13, 40, 27, 32, 35, 86,240,241,242,243,244,
+ 11, 28, 41, 29, 33,245, 50, 37,  6,  7, 67, 77, 38, 93,246,247,
+ 68, 56, 59, 65, 69, 60, 70, 80, 71, 87,248,249,250,251,252,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 92.6386%
+# first 1024 sequences:7.3177%
+# rest  sequences:     1.0230%
+# negative sequences:  0.0436%
+ThaiLangModel = (
+0,1,3,3,3,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,0,0,3,3,3,0,3,3,3,3,
+0,3,3,0,0,0,1,3,0,3,3,2,3,3,0,1,2,3,3,3,3,0,2,0,2,0,0,3,2,1,2,2,
+3,0,3,3,2,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,0,3,2,3,0,2,2,2,3,
+0,2,3,0,0,0,0,1,0,1,2,3,1,1,3,2,2,0,1,1,0,0,1,0,0,0,0,0,0,0,1,1,
+3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,3,3,2,3,2,3,3,2,2,2,
+3,1,2,3,0,3,3,2,2,1,2,3,3,1,2,0,1,3,0,1,0,0,1,0,0,0,0,0,0,0,1,1,
+3,3,2,2,3,3,3,3,1,2,3,3,3,3,3,2,2,2,2,3,3,2,2,3,3,2,2,3,2,3,2,2,
+3,3,1,2,3,1,2,2,3,3,1,0,2,1,0,0,3,1,2,1,0,0,1,0,0,0,0,0,0,1,0,1,
+3,3,3,3,3,3,2,2,3,3,3,3,2,3,2,2,3,3,2,2,3,2,2,2,2,1,1,3,1,2,1,1,
+3,2,1,0,2,1,0,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,3,2,3,2,3,3,2,2,3,2,3,3,2,3,1,1,2,3,2,2,2,3,2,2,2,2,2,1,2,1,
+2,2,1,1,3,3,2,1,0,1,2,2,0,1,3,0,0,0,1,1,0,0,0,0,0,2,3,0,0,2,1,1,
+3,3,2,3,3,2,0,0,3,3,0,3,3,0,2,2,3,1,2,2,1,1,1,0,2,2,2,0,2,2,1,1,
+0,2,1,0,2,0,0,2,0,1,0,0,1,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,2,3,3,2,0,0,3,3,0,2,3,0,2,1,2,2,2,2,1,2,0,0,2,2,2,0,2,2,1,1,
+0,2,1,0,2,0,0,2,0,1,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,2,3,2,3,2,0,2,2,1,3,2,1,3,2,1,2,3,2,2,3,0,2,3,2,2,1,2,2,2,2,
+1,2,2,0,0,0,0,2,0,1,2,0,1,1,1,0,1,0,3,1,1,0,0,0,0,0,0,0,0,0,1,0,
+3,3,2,3,3,2,3,2,2,2,3,2,2,3,2,2,1,2,3,2,2,3,1,3,2,2,2,3,2,2,2,3,
+3,2,1,3,0,1,1,1,0,2,1,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,2,0,0,
+1,0,0,3,0,3,3,3,3,3,0,0,3,0,2,2,3,3,3,3,3,0,0,0,1,1,3,0,0,0,0,2,
+0,0,1,0,0,0,0,0,0,0,2,3,0,0,0,3,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+2,0,3,3,3,3,0,0,2,3,0,0,3,0,3,3,2,3,3,3,3,3,0,0,3,3,3,0,0,0,3,3,
+0,0,3,0,0,0,0,2,0,0,2,1,1,3,0,0,1,0,0,2,3,0,1,0,0,0,0,0,0,0,1,0,
+3,3,3,3,2,3,3,3,3,3,3,3,1,2,1,3,3,2,2,1,2,2,2,3,1,1,2,0,2,1,2,1,
+2,2,1,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,
+3,0,2,1,2,3,3,3,0,2,0,2,2,0,2,1,3,2,2,1,2,1,0,0,2,2,1,0,2,1,2,2,
+0,1,1,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,3,3,1,1,3,0,2,3,1,1,3,2,1,1,2,0,2,2,3,2,1,1,1,1,1,2,
+3,0,0,1,3,1,2,1,2,0,3,0,0,0,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
+3,3,1,1,3,2,3,3,3,1,3,2,1,3,2,1,3,2,2,2,2,1,3,3,1,2,1,3,1,2,3,0,
+2,1,1,3,2,2,2,1,2,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
+3,3,2,3,2,3,3,2,3,2,3,2,3,3,2,1,0,3,2,2,2,1,2,2,2,1,2,2,1,2,1,1,
+2,2,2,3,0,1,3,1,1,1,1,0,1,1,0,2,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,3,2,2,1,1,3,2,3,2,3,2,0,3,2,2,1,2,0,2,2,2,1,2,2,2,2,1,
+3,2,1,2,2,1,0,2,0,1,0,0,1,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,2,3,1,2,3,3,2,2,3,0,1,1,2,0,3,3,2,2,3,0,1,1,3,0,0,0,0,
+3,1,0,3,3,0,2,0,2,1,0,0,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,3,2,3,3,0,1,3,1,1,2,1,2,1,1,3,1,1,0,2,3,1,1,1,1,1,1,1,1,
+3,1,1,2,2,2,2,1,1,1,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,2,2,1,1,2,1,3,3,2,3,2,2,3,2,2,3,1,2,2,1,2,0,3,2,1,2,2,2,2,2,1,
+3,2,1,2,2,2,1,1,1,1,0,0,1,1,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,1,3,3,0,2,1,0,3,2,0,0,3,1,0,1,1,0,1,0,0,0,0,0,1,
+1,0,0,1,0,3,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,2,2,2,3,0,0,1,3,0,3,2,0,3,2,2,3,3,3,3,3,1,0,2,2,2,0,2,2,1,2,
+0,2,3,0,0,0,0,1,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,0,2,3,1,3,3,2,3,3,0,3,3,0,3,2,2,3,2,3,3,3,0,0,2,2,3,0,1,1,1,3,
+0,0,3,0,0,0,2,2,0,1,3,0,1,2,2,2,3,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,
+3,2,3,3,2,0,3,3,2,2,3,1,3,2,1,3,2,0,1,2,2,0,2,3,2,1,0,3,0,0,0,0,
+3,0,0,2,3,1,3,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,3,2,2,2,1,2,0,1,3,1,1,3,1,3,0,0,2,1,1,1,1,2,1,1,1,0,2,1,0,1,
+1,2,0,0,0,3,1,1,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,0,3,1,0,0,0,1,0,
+3,3,3,3,2,2,2,2,2,1,3,1,1,1,2,0,1,1,2,1,2,1,3,2,0,0,3,1,1,1,1,1,
+3,1,0,2,3,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,2,3,0,3,3,0,2,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,3,1,3,0,0,1,2,0,0,2,0,3,3,2,3,3,3,2,3,0,0,2,2,2,0,0,0,2,2,
+0,0,1,0,0,0,0,3,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+0,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,1,2,3,1,3,3,0,0,1,0,3,0,0,0,0,0,
+0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,1,2,3,1,2,3,1,0,3,0,2,2,1,0,2,1,1,2,0,1,0,0,1,1,1,1,0,1,0,0,
+1,0,0,0,0,1,1,0,3,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,0,1,1,1,3,1,2,2,2,2,2,2,1,1,1,1,0,3,1,0,1,3,1,1,1,1,
+1,1,0,2,0,1,3,1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,1,
+3,0,2,2,1,3,3,2,3,3,0,1,1,0,2,2,1,2,1,3,3,1,0,0,3,2,0,0,0,0,2,1,
+0,1,0,0,0,0,1,2,0,1,1,3,1,1,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,3,0,0,1,0,0,0,3,0,0,3,0,3,1,0,1,1,1,3,2,0,0,0,3,0,0,0,0,2,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,1,3,2,1,3,3,1,2,2,0,1,2,1,0,1,2,0,0,0,0,0,3,0,0,0,3,0,0,0,0,
+3,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,1,2,0,3,3,3,2,2,0,1,1,0,1,3,0,0,0,2,2,0,0,0,0,3,1,0,1,0,0,0,
+0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,2,3,1,2,0,0,2,1,0,3,1,0,1,2,0,1,1,1,1,3,0,0,3,1,1,0,2,2,1,1,
+0,2,0,0,0,0,0,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,3,1,2,0,0,2,2,0,1,2,0,1,0,1,3,1,2,1,0,0,0,2,0,3,0,0,0,1,0,
+0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,1,1,2,2,0,0,0,2,0,2,1,0,1,1,0,1,1,1,2,1,0,0,1,1,1,0,2,1,1,1,
+0,1,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,1,
+0,0,0,2,0,1,3,1,1,1,1,0,0,0,0,3,2,0,1,0,0,0,1,2,0,0,0,1,0,0,0,0,
+0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,2,3,2,2,0,0,0,1,0,0,0,0,2,3,2,1,2,2,3,0,0,0,2,3,1,0,0,0,1,1,
+0,0,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,
+3,3,2,2,0,1,0,0,0,0,2,0,2,0,1,0,0,0,1,1,0,0,0,2,1,0,1,0,1,1,0,0,
+0,1,0,2,0,0,1,0,3,0,1,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,1,0,0,1,0,0,0,0,0,1,1,2,0,0,0,0,1,0,0,1,3,1,0,0,0,0,1,1,0,0,
+0,1,0,0,0,0,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
+3,3,1,1,1,1,2,3,0,0,2,1,1,1,1,1,0,2,1,1,0,0,0,2,1,0,1,2,1,1,0,1,
+2,1,0,3,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,3,1,0,0,0,0,0,0,0,3,0,0,0,3,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,
+0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,0,0,0,0,1,2,1,0,1,1,0,2,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,2,0,0,0,1,3,0,1,0,0,0,2,0,0,0,0,0,0,0,1,2,0,0,0,0,0,
+3,3,0,0,1,1,2,0,0,1,2,1,0,1,1,1,0,1,1,0,0,2,1,1,0,1,0,0,1,1,1,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,1,0,0,0,0,1,0,0,0,0,3,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,0,0,1,1,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,0,1,2,0,1,2,0,0,1,1,0,2,0,1,0,0,1,0,0,0,0,1,0,0,0,2,0,0,0,0,
+1,0,0,1,0,1,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,0,0,0,0,0,0,0,1,1,0,1,1,0,2,1,3,0,0,0,0,1,1,0,0,0,0,0,0,0,3,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,1,0,0,2,0,0,2,0,0,1,1,2,0,0,1,1,0,0,0,1,0,0,0,1,1,0,0,0,
+1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,3,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,
+1,0,0,0,0,0,0,0,0,1,0,0,0,0,2,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,1,0,0,2,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+TIS620ThaiModel = {
+  'char_to_order_map': TIS620CharToOrderMap,
+  'precedence_matrix': ThaiLangModel,
+  'typical_positive_ratio': 0.926386,
+  'keep_english_letter': False,
+  'charset_name': "TIS-620",
+  'language': 'Thai',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langturkishmodel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langturkishmodel.py
new file mode 100644
index 00000000..a427a457
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/langturkishmodel.py
@@ -0,0 +1,193 @@
+# -*- coding: utf-8 -*-
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Özgür Baskın - Turkish Language Model
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin5_TurkishCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255, 23, 37, 47, 39, 29, 52, 36, 45, 53, 60, 16, 49, 20, 46, 42,
+ 48, 69, 44, 35, 31, 51, 38, 62, 65, 43, 56,255,255,255,255,255,
+255,  1, 21, 28, 12,  2, 18, 27, 25,  3, 24, 10,  5, 13,  4, 15,
+ 26, 64,  7,  8,  9, 14, 32, 57, 58, 11, 22,255,255,255,255,255,
+180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,
+164,163,162,161,160,159,101,158,157,156,155,154,153,152,151,106,
+150,149,148,147,146,145,144,100,143,142,141,140,139,138,137,136,
+ 94, 80, 93,135,105,134,133, 63,132,131,130,129,128,127,126,125,
+124,104, 73, 99, 79, 85,123, 54,122, 98, 92,121,120, 91,103,119,
+ 68,118,117, 97,116,115, 50, 90,114,113,112,111, 55, 41, 40, 86,
+ 89, 70, 59, 78, 71, 82, 88, 33, 77, 66, 84, 83,110, 75, 61, 96,
+ 30, 67,109, 74, 87,102, 34, 95, 81,108, 76, 72, 17,  6, 19,107,
+)
+
+TurkishLangModel = (
+3,2,3,3,3,1,3,3,3,3,3,3,3,3,2,1,1,3,3,1,3,3,0,3,3,3,3,3,0,3,1,3,
+3,2,1,0,0,1,1,0,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
+3,2,2,3,3,0,3,3,3,3,3,3,3,2,3,1,0,3,3,1,3,3,0,3,3,3,3,3,0,3,0,3,
+3,1,1,0,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,0,1,0,1,
+3,3,2,3,3,0,3,3,3,3,3,3,3,2,3,1,1,3,3,0,3,3,1,2,3,3,3,3,0,3,0,3,
+3,1,1,0,0,0,1,0,0,0,0,1,1,0,1,2,1,0,0,0,1,0,0,0,0,2,0,0,0,0,0,1,
+3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,1,3,3,2,0,3,2,1,2,2,1,3,3,0,0,0,2,
+2,2,0,1,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,1,
+3,3,3,2,3,3,1,2,3,3,3,3,3,3,3,1,3,2,1,0,3,2,0,1,2,3,3,2,1,0,0,2,
+2,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,2,0,0,0,
+1,0,1,3,3,1,3,3,3,3,3,3,3,1,2,0,0,2,3,0,2,3,0,0,2,2,2,3,0,3,0,1,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,0,3,2,0,2,3,2,3,3,1,0,0,2,
+3,2,0,0,1,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,1,1,1,0,2,0,0,1,
+3,3,3,2,3,3,2,3,3,3,3,2,3,3,3,0,3,3,0,0,2,1,0,0,2,3,2,2,0,0,0,2,
+2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,0,1,0,2,0,0,1,
+3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,0,1,3,2,1,1,3,2,3,2,1,0,0,2,
+2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,
+3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,2,0,2,3,0,0,2,2,2,2,0,0,0,2,
+3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
+3,3,3,3,3,3,3,2,2,2,2,3,2,3,3,0,3,3,1,1,2,2,0,0,2,2,3,2,0,0,1,3,
+0,3,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,
+3,3,3,2,3,3,3,2,1,2,2,3,2,3,3,0,3,2,0,0,1,1,0,1,1,2,1,2,0,0,0,1,
+0,3,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,0,0,
+3,3,3,2,3,3,2,3,2,2,2,3,3,3,3,1,3,1,1,0,3,2,1,1,3,3,2,3,1,0,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,0,1,
+3,2,2,3,3,0,3,3,3,3,3,3,3,2,2,1,0,3,3,1,3,3,0,1,3,3,2,3,0,3,0,3,
+2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+2,2,2,3,3,0,3,3,3,3,3,3,3,3,3,0,0,3,2,0,3,3,0,3,2,3,3,3,0,3,1,3,
+2,0,0,0,0,0,0,0,0,0,0,1,0,1,2,0,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
+3,3,3,1,2,3,3,1,0,0,1,0,0,3,3,2,3,0,0,2,0,0,2,0,2,0,0,0,2,0,2,0,
+0,3,1,0,1,0,0,0,2,2,1,0,1,1,2,1,2,2,2,0,2,1,1,0,0,0,2,0,0,0,0,0,
+1,2,1,3,3,0,3,3,3,3,3,2,3,0,0,0,0,2,3,0,2,3,1,0,2,3,1,3,0,3,0,2,
+3,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,3,3,2,2,3,2,2,0,1,2,3,0,1,2,1,0,1,0,0,0,1,0,2,2,0,0,0,1,
+1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,
+3,3,3,1,3,3,1,1,3,3,1,1,3,3,1,0,2,1,2,0,2,1,0,0,1,1,2,1,0,0,0,2,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,0,2,1,3,0,0,2,0,0,3,3,0,3,0,0,1,0,1,2,0,0,1,1,2,2,0,1,0,
+0,1,2,1,1,0,1,0,1,1,1,1,1,0,1,1,1,2,2,1,2,0,1,0,0,0,0,0,0,1,0,0,
+3,3,3,2,3,2,3,3,0,2,2,2,3,3,3,0,3,0,0,0,2,2,0,1,2,1,1,1,0,0,0,1,
+0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+3,3,3,3,3,3,2,1,2,2,3,3,3,3,2,0,2,0,0,0,2,2,0,0,2,1,3,3,0,0,1,1,
+1,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,
+1,1,2,3,3,0,3,3,3,3,3,3,2,2,0,2,0,2,3,2,3,2,2,2,2,2,2,2,1,3,2,3,
+2,0,2,1,2,2,2,2,1,1,2,2,1,2,2,1,2,0,0,2,1,1,0,2,1,0,0,1,0,0,0,1,
+2,3,3,1,1,1,0,1,1,1,2,3,2,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,
+0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,2,2,3,2,3,2,2,1,3,3,3,0,2,1,2,0,2,1,0,0,1,1,1,1,1,0,0,1,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
+3,3,3,2,3,3,3,3,3,2,3,1,2,3,3,1,2,0,0,0,0,0,0,0,3,2,1,1,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+3,3,3,2,2,3,3,2,1,1,1,1,1,3,3,0,3,1,0,0,1,1,0,0,3,1,2,1,0,0,0,0,
+0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,
+3,3,3,2,2,3,2,2,2,3,2,1,1,3,3,0,3,0,0,0,0,1,0,0,3,1,1,2,0,0,0,1,
+1,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,1,3,3,0,3,3,3,3,3,2,2,2,1,2,0,2,1,2,2,1,1,0,1,2,2,2,2,2,2,2,
+0,0,2,1,2,1,2,1,0,1,1,3,1,2,1,1,2,0,0,2,0,1,0,1,0,1,0,0,0,1,0,1,
+3,3,3,1,3,3,3,0,1,1,0,2,2,3,1,0,3,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,2,2,1,0,0,1,0,0,3,3,1,3,0,0,1,1,0,2,0,3,0,0,0,2,0,1,1,
+0,1,2,0,1,2,2,0,2,2,2,2,1,0,2,1,1,0,2,0,2,1,2,0,0,0,0,0,0,0,0,0,
+3,3,3,1,3,2,3,2,0,2,2,2,1,3,2,0,2,1,2,0,1,2,0,0,1,0,2,2,0,0,0,2,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,
+3,3,3,0,3,3,1,1,2,3,1,0,3,2,3,0,3,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,
+1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,3,3,0,3,3,2,3,3,2,2,0,0,0,0,1,2,0,1,3,0,0,0,3,1,1,0,3,0,2,
+2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,2,2,1,0,3,1,1,1,1,3,3,2,3,0,0,1,0,1,2,0,2,2,0,2,2,0,2,1,
+0,2,2,1,1,1,1,0,2,1,1,0,1,1,1,1,2,1,2,1,2,0,1,0,1,0,0,0,0,0,0,0,
+3,3,3,0,1,1,3,0,0,1,1,0,0,2,2,0,3,0,0,1,1,0,1,0,0,0,0,0,2,0,0,0,
+0,3,1,0,1,0,1,0,2,0,0,1,0,1,0,1,1,1,2,1,1,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,0,2,0,1,1,1,0,0,3,3,0,2,0,0,1,0,0,2,1,1,0,1,0,1,0,1,0,
+0,2,0,1,2,0,2,0,2,1,1,0,1,0,2,1,1,0,2,1,1,0,1,0,0,0,1,1,0,0,0,0,
+3,2,3,0,1,0,0,0,0,0,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,0,2,0,0,0,
+0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,2,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,0,0,2,3,0,0,1,0,1,0,2,3,2,3,0,0,1,3,0,2,1,0,0,0,0,2,0,1,0,
+0,2,1,0,0,1,1,0,2,1,0,0,1,0,0,1,1,0,1,1,2,0,1,0,0,0,0,1,0,0,0,0,
+3,2,2,0,0,1,1,0,0,0,0,0,0,3,1,1,1,0,0,0,0,0,1,0,0,0,0,0,2,0,1,0,
+0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,3,3,0,2,3,2,2,1,2,2,1,1,2,0,1,3,2,2,2,0,0,2,2,0,0,0,1,2,1,
+3,0,2,1,1,0,1,1,1,0,1,2,2,2,1,1,2,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,
+0,1,1,2,3,0,3,3,3,2,2,2,2,1,0,1,0,1,0,1,2,2,0,0,2,2,1,3,1,1,2,1,
+0,0,1,1,2,0,1,1,0,0,1,2,0,2,1,1,2,0,0,1,0,0,0,1,0,1,0,1,0,0,0,0,
+3,3,2,0,0,3,1,0,0,0,0,0,0,3,2,1,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
+0,2,1,1,0,0,1,0,1,2,0,0,1,1,0,0,2,1,1,1,1,0,2,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,1,0,0,0,0,1,0,0,3,3,2,2,0,0,1,0,0,2,0,1,0,0,0,2,0,1,0,
+0,0,1,1,0,0,2,0,2,1,0,0,1,1,2,1,2,0,2,1,2,1,1,1,0,0,1,1,0,0,0,0,
+3,3,2,0,0,2,2,0,0,0,1,1,0,2,2,1,3,1,0,1,0,1,2,0,0,0,0,0,1,0,1,0,
+0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,0,0,0,1,0,0,1,0,0,2,3,1,2,0,0,1,0,0,2,0,0,0,1,0,2,0,2,0,
+0,1,1,2,2,1,2,0,2,1,1,0,0,1,1,0,1,1,1,1,2,1,1,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,1,2,1,0,0,1,1,0,3,3,1,2,0,0,1,0,0,2,0,2,0,1,1,2,0,0,0,
+0,0,1,1,1,1,2,0,1,1,0,1,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
+3,3,3,0,2,2,3,2,0,0,1,0,0,2,3,1,0,0,0,0,0,0,2,0,2,0,0,0,2,0,0,0,
+0,1,1,0,0,0,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,0,0,0,0,0,0,0,1,0,0,2,2,2,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
+0,0,2,1,1,0,1,0,2,1,1,0,0,1,1,2,1,0,2,0,2,0,1,0,0,0,2,0,0,0,0,0,
+0,0,0,2,2,0,2,1,1,1,1,2,2,0,0,1,0,1,0,0,1,3,0,0,0,0,1,0,0,2,1,0,
+0,0,1,0,1,0,0,0,0,0,2,1,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+2,0,0,2,3,0,2,3,1,2,2,0,2,0,0,2,0,2,1,1,1,2,1,0,0,1,2,1,1,2,1,0,
+1,0,2,0,1,0,1,1,0,0,2,2,1,2,1,1,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,1,2,0,0,0,1,0,0,3,2,0,1,0,0,1,0,0,2,0,0,0,1,2,1,0,1,0,
+0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,2,2,0,2,2,1,1,0,1,1,1,1,1,0,0,1,2,1,1,1,0,1,0,0,0,1,1,1,1,
+0,0,2,1,0,1,1,1,0,1,1,2,1,2,1,1,2,0,1,1,2,1,0,2,0,0,0,0,0,0,0,0,
+3,2,2,0,0,2,0,0,0,0,0,0,0,2,2,0,2,0,0,1,0,0,2,0,0,0,0,0,2,0,0,0,
+0,2,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,3,2,0,2,2,0,1,1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,
+2,0,1,0,1,0,1,1,0,0,1,2,0,1,0,1,1,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,
+2,2,2,0,1,1,0,0,0,1,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,1,2,0,1,0,
+0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,1,0,1,1,1,0,0,0,0,1,2,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
+1,1,2,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,
+0,0,1,2,2,0,2,1,2,1,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+2,2,2,0,0,0,1,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,0,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin5TurkishModel = {
+  'char_to_order_map': Latin5_TurkishCharToOrderMap,
+  'precedence_matrix': TurkishLangModel,
+  'typical_positive_ratio': 0.970290,
+  'keep_english_letter': True,
+  'charset_name': "ISO-8859-9",
+  'language': 'Turkish',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/latin1prober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/latin1prober.py
new file mode 100644
index 00000000..7d1e8c20
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/latin1prober.py
@@ -0,0 +1,145 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+FREQ_CAT_NUM = 4
+
+UDF = 0  # undefined
+OTH = 1  # other
+ASC = 2  # ascii capital letter
+ASS = 3  # ascii small letter
+ACV = 4  # accent capital vowel
+ACO = 5  # accent capital other
+ASV = 6  # accent small vowel
+ASO = 7  # accent small other
+CLASS_NUM = 8  # total classes
+
+Latin1_CharToClass = (
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 00 - 07
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 08 - 0F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 10 - 17
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 18 - 1F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 20 - 27
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 28 - 2F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 30 - 37
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 38 - 3F
+    OTH, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 40 - 47
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 48 - 4F
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 50 - 57
+    ASC, ASC, ASC, OTH, OTH, OTH, OTH, OTH,   # 58 - 5F
+    OTH, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 60 - 67
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 68 - 6F
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 70 - 77
+    ASS, ASS, ASS, OTH, OTH, OTH, OTH, OTH,   # 78 - 7F
+    OTH, UDF, OTH, ASO, OTH, OTH, OTH, OTH,   # 80 - 87
+    OTH, OTH, ACO, OTH, ACO, UDF, ACO, UDF,   # 88 - 8F
+    UDF, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 90 - 97
+    OTH, OTH, ASO, OTH, ASO, UDF, ASO, ACO,   # 98 - 9F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A0 - A7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A8 - AF
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B0 - B7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B8 - BF
+    ACV, ACV, ACV, ACV, ACV, ACV, ACO, ACO,   # C0 - C7
+    ACV, ACV, ACV, ACV, ACV, ACV, ACV, ACV,   # C8 - CF
+    ACO, ACO, ACV, ACV, ACV, ACV, ACV, OTH,   # D0 - D7
+    ACV, ACV, ACV, ACV, ACV, ACO, ACO, ACO,   # D8 - DF
+    ASV, ASV, ASV, ASV, ASV, ASV, ASO, ASO,   # E0 - E7
+    ASV, ASV, ASV, ASV, ASV, ASV, ASV, ASV,   # E8 - EF
+    ASO, ASO, ASV, ASV, ASV, ASV, ASV, OTH,   # F0 - F7
+    ASV, ASV, ASV, ASV, ASV, ASO, ASO, ASO,   # F8 - FF
+)
+
+# 0 : illegal
+# 1 : very unlikely
+# 2 : normal
+# 3 : very likely
+Latin1ClassModel = (
+# UDF OTH ASC ASS ACV ACO ASV ASO
+    0,  0,  0,  0,  0,  0,  0,  0,  # UDF
+    0,  3,  3,  3,  3,  3,  3,  3,  # OTH
+    0,  3,  3,  3,  3,  3,  3,  3,  # ASC
+    0,  3,  3,  3,  1,  1,  3,  3,  # ASS
+    0,  3,  3,  3,  1,  2,  1,  2,  # ACV
+    0,  3,  3,  3,  3,  3,  3,  3,  # ACO
+    0,  3,  1,  3,  1,  1,  1,  3,  # ASV
+    0,  3,  1,  3,  1,  1,  3,  3,  # ASO
+)
+
+
+class Latin1Prober(CharSetProber):
+    def __init__(self):
+        super(Latin1Prober, self).__init__()
+        self._last_char_class = None
+        self._freq_counter = None
+        self.reset()
+
+    def reset(self):
+        self._last_char_class = OTH
+        self._freq_counter = [0] * FREQ_CAT_NUM
+        CharSetProber.reset(self)
+
+    @property
+    def charset_name(self):
+        return "ISO-8859-1"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        byte_str = self.filter_with_english_letters(byte_str)
+        for c in byte_str:
+            char_class = Latin1_CharToClass[c]
+            freq = Latin1ClassModel[(self._last_char_class * CLASS_NUM)
+                                    + char_class]
+            if freq == 0:
+                self._state = ProbingState.NOT_ME
+                break
+            self._freq_counter[freq] += 1
+            self._last_char_class = char_class
+
+        return self.state
+
+    def get_confidence(self):
+        if self.state == ProbingState.NOT_ME:
+            return 0.01
+
+        total = sum(self._freq_counter)
+        if total < 0.01:
+            confidence = 0.0
+        else:
+            confidence = ((self._freq_counter[3] - self._freq_counter[1] * 20.0)
+                          / total)
+        if confidence < 0.0:
+            confidence = 0.0
+        # lower the confidence of latin1 so that other more accurate
+        # detector can take priority.
+        confidence = confidence * 0.73
+        return confidence
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcharsetprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcharsetprober.py
new file mode 100644
index 00000000..6256ecfd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcharsetprober.py
@@ -0,0 +1,91 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState, MachineState
+
+
+class MultiByteCharSetProber(CharSetProber):
+    """
+    MultiByteCharSetProber
+    """
+
+    def __init__(self, lang_filter=None):
+        super(MultiByteCharSetProber, self).__init__(lang_filter=lang_filter)
+        self.distribution_analyzer = None
+        self.coding_sm = None
+        self._last_char = [0, 0]
+
+    def reset(self):
+        super(MultiByteCharSetProber, self).reset()
+        if self.coding_sm:
+            self.coding_sm.reset()
+        if self.distribution_analyzer:
+            self.distribution_analyzer.reset()
+        self._last_char = [0, 0]
+
+    @property
+    def charset_name(self):
+        raise NotImplementedError
+
+    @property
+    def language(self):
+        raise NotImplementedError
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                    char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.distribution_analyzer.got_enough_data() and
+                    (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        return self.distribution_analyzer.get_confidence()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcsgroupprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
new file mode 100644
index 00000000..530abe75
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
@@ -0,0 +1,54 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetgroupprober import CharSetGroupProber
+from .utf8prober import UTF8Prober
+from .sjisprober import SJISProber
+from .eucjpprober import EUCJPProber
+from .gb2312prober import GB2312Prober
+from .euckrprober import EUCKRProber
+from .cp949prober import CP949Prober
+from .big5prober import Big5Prober
+from .euctwprober import EUCTWProber
+
+
+class MBCSGroupProber(CharSetGroupProber):
+    def __init__(self, lang_filter=None):
+        super(MBCSGroupProber, self).__init__(lang_filter=lang_filter)
+        self.probers = [
+            UTF8Prober(),
+            SJISProber(),
+            EUCJPProber(),
+            GB2312Prober(),
+            EUCKRProber(),
+            CP949Prober(),
+            Big5Prober(),
+            EUCTWProber()
+        ]
+        self.reset()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcssm.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcssm.py
new file mode 100644
index 00000000..8360d0f2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/mbcssm.py
@@ -0,0 +1,572 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+# BIG5
+
+BIG5_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07    #allow 0x00 as legal value
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,1,  # 78 - 7f
+    4,4,4,4,4,4,4,4,  # 80 - 87
+    4,4,4,4,4,4,4,4,  # 88 - 8f
+    4,4,4,4,4,4,4,4,  # 90 - 97
+    4,4,4,4,4,4,4,4,  # 98 - 9f
+    4,3,3,3,3,3,3,3,  # a0 - a7
+    3,3,3,3,3,3,3,3,  # a8 - af
+    3,3,3,3,3,3,3,3,  # b0 - b7
+    3,3,3,3,3,3,3,3,  # b8 - bf
+    3,3,3,3,3,3,3,3,  # c0 - c7
+    3,3,3,3,3,3,3,3,  # c8 - cf
+    3,3,3,3,3,3,3,3,  # d0 - d7
+    3,3,3,3,3,3,3,3,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,3,3,3,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,3,3,0  # f8 - ff
+)
+
+BIG5_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,#08-0f
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START#10-17
+)
+
+BIG5_CHAR_LEN_TABLE = (0, 1, 1, 2, 0)
+
+BIG5_SM_MODEL = {'class_table': BIG5_CLS,
+                 'class_factor': 5,
+                 'state_table': BIG5_ST,
+                 'char_len_table': BIG5_CHAR_LEN_TABLE,
+                 'name': 'Big5'}
+
+# CP949
+
+CP949_CLS  = (
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,0,0,  # 00 - 0f
+    1,1,1,1,1,1,1,1, 1,1,1,0,1,1,1,1,  # 10 - 1f
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 20 - 2f
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 30 - 3f
+    1,4,4,4,4,4,4,4, 4,4,4,4,4,4,4,4,  # 40 - 4f
+    4,4,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 50 - 5f
+    1,5,5,5,5,5,5,5, 5,5,5,5,5,5,5,5,  # 60 - 6f
+    5,5,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 70 - 7f
+    0,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 80 - 8f
+    6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 90 - 9f
+    6,7,7,7,7,7,7,7, 7,7,7,7,7,8,8,8,  # a0 - af
+    7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,  # b0 - bf
+    7,7,7,7,7,7,9,2, 2,3,2,2,2,2,2,2,  # c0 - cf
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # d0 - df
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # e0 - ef
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,0,  # f0 - ff
+)
+
+CP949_ST = (
+#cls=    0      1      2      3      4      5      6      7      8      9  # previous state =
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,     4,     5,MachineState.ERROR,     6, # MachineState.START
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR, # MachineState.ERROR
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME, # MachineState.ITS_ME
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 3
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 4
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 5
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 6
+)
+
+CP949_CHAR_LEN_TABLE = (0, 1, 2, 0, 1, 1, 2, 2, 0, 2)
+
+CP949_SM_MODEL = {'class_table': CP949_CLS,
+                  'class_factor': 10,
+                  'state_table': CP949_ST,
+                  'char_len_table': CP949_CHAR_LEN_TABLE,
+                  'name': 'CP949'}
+
+# EUC-JP
+
+EUCJP_CLS = (
+    4,4,4,4,4,4,4,4,  # 00 - 07
+    4,4,4,4,4,4,5,5,  # 08 - 0f
+    4,4,4,4,4,4,4,4,  # 10 - 17
+    4,4,4,5,4,4,4,4,  # 18 - 1f
+    4,4,4,4,4,4,4,4,  # 20 - 27
+    4,4,4,4,4,4,4,4,  # 28 - 2f
+    4,4,4,4,4,4,4,4,  # 30 - 37
+    4,4,4,4,4,4,4,4,  # 38 - 3f
+    4,4,4,4,4,4,4,4,  # 40 - 47
+    4,4,4,4,4,4,4,4,  # 48 - 4f
+    4,4,4,4,4,4,4,4,  # 50 - 57
+    4,4,4,4,4,4,4,4,  # 58 - 5f
+    4,4,4,4,4,4,4,4,  # 60 - 67
+    4,4,4,4,4,4,4,4,  # 68 - 6f
+    4,4,4,4,4,4,4,4,  # 70 - 77
+    4,4,4,4,4,4,4,4,  # 78 - 7f
+    5,5,5,5,5,5,5,5,  # 80 - 87
+    5,5,5,5,5,5,1,3,  # 88 - 8f
+    5,5,5,5,5,5,5,5,  # 90 - 97
+    5,5,5,5,5,5,5,5,  # 98 - 9f
+    5,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,2,2,2,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,2,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,0,5  # f8 - ff
+)
+
+EUCJP_ST = (
+          3,     4,     3,     5,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+     MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     3,MachineState.ERROR,#18-1f
+          3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START#20-27
+)
+
+EUCJP_CHAR_LEN_TABLE = (2, 2, 2, 3, 1, 0)
+
+EUCJP_SM_MODEL = {'class_table': EUCJP_CLS,
+                  'class_factor': 6,
+                  'state_table': EUCJP_ST,
+                  'char_len_table': EUCJP_CHAR_LEN_TABLE,
+                  'name': 'EUC-JP'}
+
+# EUC-KR
+
+EUCKR_CLS  = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    1,1,1,1,1,1,1,1,  # 40 - 47
+    1,1,1,1,1,1,1,1,  # 48 - 4f
+    1,1,1,1,1,1,1,1,  # 50 - 57
+    1,1,1,1,1,1,1,1,  # 58 - 5f
+    1,1,1,1,1,1,1,1,  # 60 - 67
+    1,1,1,1,1,1,1,1,  # 68 - 6f
+    1,1,1,1,1,1,1,1,  # 70 - 77
+    1,1,1,1,1,1,1,1,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,3,3,3,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,3,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    2,2,2,2,2,2,2,2,  # e0 - e7
+    2,2,2,2,2,2,2,2,  # e8 - ef
+    2,2,2,2,2,2,2,2,  # f0 - f7
+    2,2,2,2,2,2,2,0   # f8 - ff
+)
+
+EUCKR_ST = (
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #08-0f
+)
+
+EUCKR_CHAR_LEN_TABLE = (0, 1, 2, 0)
+
+EUCKR_SM_MODEL = {'class_table': EUCKR_CLS,
+                'class_factor': 4,
+                'state_table': EUCKR_ST,
+                'char_len_table': EUCKR_CHAR_LEN_TABLE,
+                'name': 'EUC-KR'}
+
+# EUC-TW
+
+EUCTW_CLS = (
+    2,2,2,2,2,2,2,2,  # 00 - 07
+    2,2,2,2,2,2,0,0,  # 08 - 0f
+    2,2,2,2,2,2,2,2,  # 10 - 17
+    2,2,2,0,2,2,2,2,  # 18 - 1f
+    2,2,2,2,2,2,2,2,  # 20 - 27
+    2,2,2,2,2,2,2,2,  # 28 - 2f
+    2,2,2,2,2,2,2,2,  # 30 - 37
+    2,2,2,2,2,2,2,2,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,2,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,6,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,3,4,4,4,4,4,4,  # a0 - a7
+    5,5,1,1,1,1,1,1,  # a8 - af
+    1,1,1,1,1,1,1,1,  # b0 - b7
+    1,1,1,1,1,1,1,1,  # b8 - bf
+    1,1,3,1,3,3,3,3,  # c0 - c7
+    3,3,3,3,3,3,3,3,  # c8 - cf
+    3,3,3,3,3,3,3,3,  # d0 - d7
+    3,3,3,3,3,3,3,3,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,3,3,3,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,3,3,0   # f8 - ff
+)
+
+EUCTW_ST = (
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,     3,     3,     3,     4,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.ERROR,#10-17
+    MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+         5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,#20-27
+    MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+
+EUCTW_CHAR_LEN_TABLE = (0, 0, 1, 2, 2, 2, 3)
+
+EUCTW_SM_MODEL = {'class_table': EUCTW_CLS,
+                'class_factor': 7,
+                'state_table': EUCTW_ST,
+                'char_len_table': EUCTW_CHAR_LEN_TABLE,
+                'name': 'x-euc-tw'}
+
+# GB2312
+
+GB2312_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    3,3,3,3,3,3,3,3,  # 30 - 37
+    3,3,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,4,  # 78 - 7f
+    5,6,6,6,6,6,6,6,  # 80 - 87
+    6,6,6,6,6,6,6,6,  # 88 - 8f
+    6,6,6,6,6,6,6,6,  # 90 - 97
+    6,6,6,6,6,6,6,6,  # 98 - 9f
+    6,6,6,6,6,6,6,6,  # a0 - a7
+    6,6,6,6,6,6,6,6,  # a8 - af
+    6,6,6,6,6,6,6,6,  # b0 - b7
+    6,6,6,6,6,6,6,6,  # b8 - bf
+    6,6,6,6,6,6,6,6,  # c0 - c7
+    6,6,6,6,6,6,6,6,  # c8 - cf
+    6,6,6,6,6,6,6,6,  # d0 - d7
+    6,6,6,6,6,6,6,6,  # d8 - df
+    6,6,6,6,6,6,6,6,  # e0 - e7
+    6,6,6,6,6,6,6,6,  # e8 - ef
+    6,6,6,6,6,6,6,6,  # f0 - f7
+    6,6,6,6,6,6,6,0   # f8 - ff
+)
+
+GB2312_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,     3,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,#10-17
+         4,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#20-27
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+
+# To be accurate, the length of class 6 can be either 2 or 4.
+# But it is not necessary to discriminate between the two since
+# it is used for frequency analysis only, and we are validating
+# each code range there as well. So it is safe to set it to be
+# 2 here.
+GB2312_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 1, 2)
+
+GB2312_SM_MODEL = {'class_table': GB2312_CLS,
+                   'class_factor': 7,
+                   'state_table': GB2312_ST,
+                   'char_len_table': GB2312_CHAR_LEN_TABLE,
+                   'name': 'GB2312'}
+
+# Shift_JIS
+
+SJIS_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,1,  # 78 - 7f
+    3,3,3,3,3,2,2,3,  # 80 - 87
+    3,3,3,3,3,3,3,3,  # 88 - 8f
+    3,3,3,3,3,3,3,3,  # 90 - 97
+    3,3,3,3,3,3,3,3,  # 98 - 9f
+    #0xa0 is illegal in sjis encoding, but some pages does
+    #contain such byte. We need to be more error forgiven.
+    2,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,2,2,2,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,2,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,4,4,4,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,0,0,0)  # f8 - ff
+
+
+SJIS_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START #10-17
+)
+
+SJIS_CHAR_LEN_TABLE = (0, 1, 1, 2, 0, 0)
+
+SJIS_SM_MODEL = {'class_table': SJIS_CLS,
+               'class_factor': 6,
+               'state_table': SJIS_ST,
+               'char_len_table': SJIS_CHAR_LEN_TABLE,
+               'name': 'Shift_JIS'}
+
+# UCS2-BE
+
+UCS2BE_CLS = (
+    0,0,0,0,0,0,0,0,  # 00 - 07
+    0,0,1,0,0,2,0,0,  # 08 - 0f
+    0,0,0,0,0,0,0,0,  # 10 - 17
+    0,0,0,3,0,0,0,0,  # 18 - 1f
+    0,0,0,0,0,0,0,0,  # 20 - 27
+    0,3,3,3,3,3,0,0,  # 28 - 2f
+    0,0,0,0,0,0,0,0,  # 30 - 37
+    0,0,0,0,0,0,0,0,  # 38 - 3f
+    0,0,0,0,0,0,0,0,  # 40 - 47
+    0,0,0,0,0,0,0,0,  # 48 - 4f
+    0,0,0,0,0,0,0,0,  # 50 - 57
+    0,0,0,0,0,0,0,0,  # 58 - 5f
+    0,0,0,0,0,0,0,0,  # 60 - 67
+    0,0,0,0,0,0,0,0,  # 68 - 6f
+    0,0,0,0,0,0,0,0,  # 70 - 77
+    0,0,0,0,0,0,0,0,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,0,0,0,0,0,0,0,  # a0 - a7
+    0,0,0,0,0,0,0,0,  # a8 - af
+    0,0,0,0,0,0,0,0,  # b0 - b7
+    0,0,0,0,0,0,0,0,  # b8 - bf
+    0,0,0,0,0,0,0,0,  # c0 - c7
+    0,0,0,0,0,0,0,0,  # c8 - cf
+    0,0,0,0,0,0,0,0,  # d0 - d7
+    0,0,0,0,0,0,0,0,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,4,5   # f8 - ff
+)
+
+UCS2BE_ST  = (
+          5,     7,     7,MachineState.ERROR,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,#10-17
+          6,     6,     6,     6,     6,MachineState.ITS_ME,     6,     6,#18-1f
+          6,     6,     6,     6,     5,     7,     7,MachineState.ERROR,#20-27
+          5,     8,     6,     6,MachineState.ERROR,     6,     6,     6,#28-2f
+          6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+
+UCS2BE_CHAR_LEN_TABLE = (2, 2, 2, 0, 2, 2)
+
+UCS2BE_SM_MODEL = {'class_table': UCS2BE_CLS,
+                   'class_factor': 6,
+                   'state_table': UCS2BE_ST,
+                   'char_len_table': UCS2BE_CHAR_LEN_TABLE,
+                   'name': 'UTF-16BE'}
+
+# UCS2-LE
+
+UCS2LE_CLS = (
+    0,0,0,0,0,0,0,0,  # 00 - 07
+    0,0,1,0,0,2,0,0,  # 08 - 0f
+    0,0,0,0,0,0,0,0,  # 10 - 17
+    0,0,0,3,0,0,0,0,  # 18 - 1f
+    0,0,0,0,0,0,0,0,  # 20 - 27
+    0,3,3,3,3,3,0,0,  # 28 - 2f
+    0,0,0,0,0,0,0,0,  # 30 - 37
+    0,0,0,0,0,0,0,0,  # 38 - 3f
+    0,0,0,0,0,0,0,0,  # 40 - 47
+    0,0,0,0,0,0,0,0,  # 48 - 4f
+    0,0,0,0,0,0,0,0,  # 50 - 57
+    0,0,0,0,0,0,0,0,  # 58 - 5f
+    0,0,0,0,0,0,0,0,  # 60 - 67
+    0,0,0,0,0,0,0,0,  # 68 - 6f
+    0,0,0,0,0,0,0,0,  # 70 - 77
+    0,0,0,0,0,0,0,0,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,0,0,0,0,0,0,0,  # a0 - a7
+    0,0,0,0,0,0,0,0,  # a8 - af
+    0,0,0,0,0,0,0,0,  # b0 - b7
+    0,0,0,0,0,0,0,0,  # b8 - bf
+    0,0,0,0,0,0,0,0,  # c0 - c7
+    0,0,0,0,0,0,0,0,  # c8 - cf
+    0,0,0,0,0,0,0,0,  # d0 - d7
+    0,0,0,0,0,0,0,0,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,4,5   # f8 - ff
+)
+
+UCS2LE_ST = (
+          6,     6,     7,     6,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     5,     5,     5,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#10-17
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,     6,     6,#18-1f
+          7,     6,     8,     8,     5,     5,     5,MachineState.ERROR,#20-27
+          5,     5,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,#28-2f
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+
+UCS2LE_CHAR_LEN_TABLE = (2, 2, 2, 2, 2, 2)
+
+UCS2LE_SM_MODEL = {'class_table': UCS2LE_CLS,
+                 'class_factor': 6,
+                 'state_table': UCS2LE_ST,
+                 'char_len_table': UCS2LE_CHAR_LEN_TABLE,
+                 'name': 'UTF-16LE'}
+
+# UTF-8
+
+UTF8_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07  #allow 0x00 as a legal value
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    1,1,1,1,1,1,1,1,  # 40 - 47
+    1,1,1,1,1,1,1,1,  # 48 - 4f
+    1,1,1,1,1,1,1,1,  # 50 - 57
+    1,1,1,1,1,1,1,1,  # 58 - 5f
+    1,1,1,1,1,1,1,1,  # 60 - 67
+    1,1,1,1,1,1,1,1,  # 68 - 6f
+    1,1,1,1,1,1,1,1,  # 70 - 77
+    1,1,1,1,1,1,1,1,  # 78 - 7f
+    2,2,2,2,3,3,3,3,  # 80 - 87
+    4,4,4,4,4,4,4,4,  # 88 - 8f
+    4,4,4,4,4,4,4,4,  # 90 - 97
+    4,4,4,4,4,4,4,4,  # 98 - 9f
+    5,5,5,5,5,5,5,5,  # a0 - a7
+    5,5,5,5,5,5,5,5,  # a8 - af
+    5,5,5,5,5,5,5,5,  # b0 - b7
+    5,5,5,5,5,5,5,5,  # b8 - bf
+    0,0,6,6,6,6,6,6,  # c0 - c7
+    6,6,6,6,6,6,6,6,  # c8 - cf
+    6,6,6,6,6,6,6,6,  # d0 - d7
+    6,6,6,6,6,6,6,6,  # d8 - df
+    7,8,8,8,8,8,8,8,  # e0 - e7
+    8,8,8,8,8,9,8,8,  # e8 - ef
+    10,11,11,11,11,11,11,11,  # f0 - f7
+    12,13,13,13,14,15,0,0    # f8 - ff
+)
+
+UTF8_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     12,   10,#00-07
+         9,     11,     8,     7,     6,     5,     4,    3,#08-0f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#20-27
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#28-2f
+    MachineState.ERROR,MachineState.ERROR,     5,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#30-37
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#38-3f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#40-47
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#48-4f
+    MachineState.ERROR,MachineState.ERROR,     7,     7,     7,     7,MachineState.ERROR,MachineState.ERROR,#50-57
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#58-5f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     7,     7,MachineState.ERROR,MachineState.ERROR,#60-67
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#68-6f
+    MachineState.ERROR,MachineState.ERROR,     9,     9,     9,     9,MachineState.ERROR,MachineState.ERROR,#70-77
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#78-7f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     9,MachineState.ERROR,MachineState.ERROR,#80-87
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#88-8f
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,#90-97
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#98-9f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,    12,MachineState.ERROR,MachineState.ERROR,#a0-a7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#a8-af
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b0-b7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b8-bf
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,#c0-c7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR #c8-cf
+)
+
+UTF8_CHAR_LEN_TABLE = (0, 1, 0, 0, 0, 0, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6)
+
+UTF8_SM_MODEL = {'class_table': UTF8_CLS,
+                 'class_factor': 16,
+                 'state_table': UTF8_ST,
+                 'char_len_table': UTF8_CHAR_LEN_TABLE,
+                 'name': 'UTF-8'}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcharsetprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcharsetprober.py
new file mode 100644
index 00000000..0adb51de
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcharsetprober.py
@@ -0,0 +1,132 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import CharacterCategory, ProbingState, SequenceLikelihood
+
+
+class SingleByteCharSetProber(CharSetProber):
+    SAMPLE_SIZE = 64
+    SB_ENOUGH_REL_THRESHOLD = 1024  #  0.25 * SAMPLE_SIZE^2
+    POSITIVE_SHORTCUT_THRESHOLD = 0.95
+    NEGATIVE_SHORTCUT_THRESHOLD = 0.05
+
+    def __init__(self, model, reversed=False, name_prober=None):
+        super(SingleByteCharSetProber, self).__init__()
+        self._model = model
+        # TRUE if we need to reverse every pair in the model lookup
+        self._reversed = reversed
+        # Optional auxiliary prober for name decision
+        self._name_prober = name_prober
+        self._last_order = None
+        self._seq_counters = None
+        self._total_seqs = None
+        self._total_char = None
+        self._freq_char = None
+        self.reset()
+
+    def reset(self):
+        super(SingleByteCharSetProber, self).reset()
+        # char order of last character
+        self._last_order = 255
+        self._seq_counters = [0] * SequenceLikelihood.get_num_categories()
+        self._total_seqs = 0
+        self._total_char = 0
+        # characters that fall in our sampling range
+        self._freq_char = 0
+
+    @property
+    def charset_name(self):
+        if self._name_prober:
+            return self._name_prober.charset_name
+        else:
+            return self._model['charset_name']
+
+    @property
+    def language(self):
+        if self._name_prober:
+            return self._name_prober.language
+        else:
+            return self._model.get('language')
+
+    def feed(self, byte_str):
+        if not self._model['keep_english_letter']:
+            byte_str = self.filter_international_words(byte_str)
+        if not byte_str:
+            return self.state
+        char_to_order_map = self._model['char_to_order_map']
+        for i, c in enumerate(byte_str):
+            # XXX: Order is in range 1-64, so one would think we want 0-63 here,
+            #      but that leads to 27 more test failures than before.
+            order = char_to_order_map[c]
+            # XXX: This was SYMBOL_CAT_ORDER before, with a value of 250, but
+            #      CharacterCategory.SYMBOL is actually 253, so we use CONTROL
+            #      to make it closer to the original intent. The only difference
+            #      is whether or not we count digits and control characters for
+            #      _total_char purposes.
+            if order < CharacterCategory.CONTROL:
+                self._total_char += 1
+            if order < self.SAMPLE_SIZE:
+                self._freq_char += 1
+                if self._last_order < self.SAMPLE_SIZE:
+                    self._total_seqs += 1
+                    if not self._reversed:
+                        i = (self._last_order * self.SAMPLE_SIZE) + order
+                        model = self._model['precedence_matrix'][i]
+                    else:  # reverse the order of the letters in the lookup
+                        i = (order * self.SAMPLE_SIZE) + self._last_order
+                        model = self._model['precedence_matrix'][i]
+                    self._seq_counters[model] += 1
+            self._last_order = order
+
+        charset_name = self._model['charset_name']
+        if self.state == ProbingState.DETECTING:
+            if self._total_seqs > self.SB_ENOUGH_REL_THRESHOLD:
+                confidence = self.get_confidence()
+                if confidence > self.POSITIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug('%s confidence = %s, we have a winner',
+                                      charset_name, confidence)
+                    self._state = ProbingState.FOUND_IT
+                elif confidence < self.NEGATIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug('%s confidence = %s, below negative '
+                                      'shortcut threshhold %s', charset_name,
+                                      confidence,
+                                      self.NEGATIVE_SHORTCUT_THRESHOLD)
+                    self._state = ProbingState.NOT_ME
+
+        return self.state
+
+    def get_confidence(self):
+        r = 0.01
+        if self._total_seqs > 0:
+            r = ((1.0 * self._seq_counters[SequenceLikelihood.POSITIVE]) /
+                 self._total_seqs / self._model['typical_positive_ratio'])
+            r = r * self._freq_char / self._total_char
+            if r >= 1.0:
+                r = 0.99
+        return r
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcsgroupprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
new file mode 100644
index 00000000..98e95dc1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
@@ -0,0 +1,73 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetgroupprober import CharSetGroupProber
+from .sbcharsetprober import SingleByteCharSetProber
+from .langcyrillicmodel import (Win1251CyrillicModel, Koi8rModel,
+                                Latin5CyrillicModel, MacCyrillicModel,
+                                Ibm866Model, Ibm855Model)
+from .langgreekmodel import Latin7GreekModel, Win1253GreekModel
+from .langbulgarianmodel import Latin5BulgarianModel, Win1251BulgarianModel
+# from .langhungarianmodel import Latin2HungarianModel, Win1250HungarianModel
+from .langthaimodel import TIS620ThaiModel
+from .langhebrewmodel import Win1255HebrewModel
+from .hebrewprober import HebrewProber
+from .langturkishmodel import Latin5TurkishModel
+
+
+class SBCSGroupProber(CharSetGroupProber):
+    def __init__(self):
+        super(SBCSGroupProber, self).__init__()
+        self.probers = [
+            SingleByteCharSetProber(Win1251CyrillicModel),
+            SingleByteCharSetProber(Koi8rModel),
+            SingleByteCharSetProber(Latin5CyrillicModel),
+            SingleByteCharSetProber(MacCyrillicModel),
+            SingleByteCharSetProber(Ibm866Model),
+            SingleByteCharSetProber(Ibm855Model),
+            SingleByteCharSetProber(Latin7GreekModel),
+            SingleByteCharSetProber(Win1253GreekModel),
+            SingleByteCharSetProber(Latin5BulgarianModel),
+            SingleByteCharSetProber(Win1251BulgarianModel),
+            # TODO: Restore Hungarian encodings (iso-8859-2 and windows-1250)
+            #       after we retrain model.
+            # SingleByteCharSetProber(Latin2HungarianModel),
+            # SingleByteCharSetProber(Win1250HungarianModel),
+            SingleByteCharSetProber(TIS620ThaiModel),
+            SingleByteCharSetProber(Latin5TurkishModel),
+        ]
+        hebrew_prober = HebrewProber()
+        logical_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel,
+                                                        False, hebrew_prober)
+        visual_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel, True,
+                                                       hebrew_prober)
+        hebrew_prober.set_model_probers(logical_hebrew_prober, visual_hebrew_prober)
+        self.probers.extend([hebrew_prober, logical_hebrew_prober,
+                             visual_hebrew_prober])
+
+        self.reset()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sjisprober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sjisprober.py
new file mode 100644
index 00000000..9e29623b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/sjisprober.py
@@ -0,0 +1,92 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import SJISDistributionAnalysis
+from .jpcntx import SJISContextAnalysis
+from .mbcssm import SJIS_SM_MODEL
+from .enums import ProbingState, MachineState
+
+
+class SJISProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(SJISProber, self).__init__()
+        self.coding_sm = CodingStateMachine(SJIS_SM_MODEL)
+        self.distribution_analyzer = SJISDistributionAnalysis()
+        self.context_analyzer = SJISContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super(SJISProber, self).reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return self.context_analyzer.charset_name
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.context_analyzer.feed(self._last_char[2 - char_len:],
+                                               char_len)
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(byte_str[i + 1 - char_len:i + 3
+                                                        - char_len], char_len)
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                    char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.context_analyzer.got_enough_data() and
+               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/universaldetector.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/universaldetector.py
new file mode 100644
index 00000000..7b4e92d6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/universaldetector.py
@@ -0,0 +1,286 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+"""
+Module containing the UniversalDetector detector class, which is the primary
+class a user of ``chardet`` should use.
+
+:author: Mark Pilgrim (initial port to Python)
+:author: Shy Shalom (original C code)
+:author: Dan Blanchard (major refactoring for 3.0)
+:author: Ian Cordasco
+"""
+
+
+import codecs
+import logging
+import re
+
+from .charsetgroupprober import CharSetGroupProber
+from .enums import InputState, LanguageFilter, ProbingState
+from .escprober import EscCharSetProber
+from .latin1prober import Latin1Prober
+from .mbcsgroupprober import MBCSGroupProber
+from .sbcsgroupprober import SBCSGroupProber
+
+
+class UniversalDetector(object):
+    """
+    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
+    and coordinates all of the different charset probers.
+
+    To get a ``dict`` containing an encoding and its confidence, you can simply
+    run:
+
+    .. code::
+
+            u = UniversalDetector()
+            u.feed(some_bytes)
+            u.close()
+            detected = u.result
+
+    """
+
+    MINIMUM_THRESHOLD = 0.20
+    HIGH_BYTE_DETECTOR = re.compile(b'[\x80-\xFF]')
+    ESC_DETECTOR = re.compile(b'(\033|~{)')
+    WIN_BYTE_DETECTOR = re.compile(b'[\x80-\x9F]')
+    ISO_WIN_MAP = {'iso-8859-1': 'Windows-1252',
+                   'iso-8859-2': 'Windows-1250',
+                   'iso-8859-5': 'Windows-1251',
+                   'iso-8859-6': 'Windows-1256',
+                   'iso-8859-7': 'Windows-1253',
+                   'iso-8859-8': 'Windows-1255',
+                   'iso-8859-9': 'Windows-1254',
+                   'iso-8859-13': 'Windows-1257'}
+
+    def __init__(self, lang_filter=LanguageFilter.ALL):
+        self._esc_charset_prober = None
+        self._charset_probers = []
+        self.result = None
+        self.done = None
+        self._got_data = None
+        self._input_state = None
+        self._last_char = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+        self._has_win_bytes = None
+        self.reset()
+
+    def reset(self):
+        """
+        Reset the UniversalDetector and all of its probers back to their
+        initial states.  This is called by ``__init__``, so you only need to
+        call this directly in between analyses of different documents.
+        """
+        self.result = {'encoding': None, 'confidence': 0.0, 'language': None}
+        self.done = False
+        self._got_data = False
+        self._has_win_bytes = False
+        self._input_state = InputState.PURE_ASCII
+        self._last_char = b''
+        if self._esc_charset_prober:
+            self._esc_charset_prober.reset()
+        for prober in self._charset_probers:
+            prober.reset()
+
+    def feed(self, byte_str):
+        """
+        Takes a chunk of a document and feeds it through all of the relevant
+        charset probers.
+
+        After calling ``feed``, you can check the value of the ``done``
+        attribute to see if you need to continue feeding the
+        ``UniversalDetector`` more data, or if it has made a prediction
+        (in the ``result`` attribute).
+
+        .. note::
+           You should always call ``close`` when you're done feeding in your
+           document if ``done`` is not already ``True``.
+        """
+        if self.done:
+            return
+
+        if not len(byte_str):
+            return
+
+        if not isinstance(byte_str, bytearray):
+            byte_str = bytearray(byte_str)
+
+        # First check for known BOMs, since these are guaranteed to be correct
+        if not self._got_data:
+            # If the data starts with BOM, we know it is UTF
+            if byte_str.startswith(codecs.BOM_UTF8):
+                # EF BB BF  UTF-8 with BOM
+                self.result = {'encoding': "UTF-8-SIG",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith((codecs.BOM_UTF32_LE,
+                                      codecs.BOM_UTF32_BE)):
+                # FF FE 00 00  UTF-32, little-endian BOM
+                # 00 00 FE FF  UTF-32, big-endian BOM
+                self.result = {'encoding': "UTF-32",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith(b'\xFE\xFF\x00\x00'):
+                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
+                self.result = {'encoding': "X-ISO-10646-UCS-4-3412",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith(b'\x00\x00\xFF\xFE'):
+                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
+                self.result = {'encoding': "X-ISO-10646-UCS-4-2143",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
+                # FF FE  UTF-16, little endian BOM
+                # FE FF  UTF-16, big endian BOM
+                self.result = {'encoding': "UTF-16",
+                               'confidence': 1.0,
+                               'language': ''}
+
+            self._got_data = True
+            if self.result['encoding'] is not None:
+                self.done = True
+                return
+
+        # If none of those matched and we've only see ASCII so far, check
+        # for high bytes and escape sequences
+        if self._input_state == InputState.PURE_ASCII:
+            if self.HIGH_BYTE_DETECTOR.search(byte_str):
+                self._input_state = InputState.HIGH_BYTE
+            elif self._input_state == InputState.PURE_ASCII and \
+                    self.ESC_DETECTOR.search(self._last_char + byte_str):
+                self._input_state = InputState.ESC_ASCII
+
+        self._last_char = byte_str[-1:]
+
+        # If we've seen escape sequences, use the EscCharSetProber, which
+        # uses a simple state machine to check for known escape sequences in
+        # HZ and ISO-2022 encodings, since those are the only encodings that
+        # use such sequences.
+        if self._input_state == InputState.ESC_ASCII:
+            if not self._esc_charset_prober:
+                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
+            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
+                self.result = {'encoding':
+                               self._esc_charset_prober.charset_name,
+                               'confidence':
+                               self._esc_charset_prober.get_confidence(),
+                               'language':
+                               self._esc_charset_prober.language}
+                self.done = True
+        # If we've seen high bytes (i.e., those with values greater than 127),
+        # we need to do more complicated checks using all our multi-byte and
+        # single-byte probers that are left.  The single-byte probers
+        # use character bigram distributions to determine the encoding, whereas
+        # the multi-byte probers use a combination of character unigram and
+        # bigram distributions.
+        elif self._input_state == InputState.HIGH_BYTE:
+            if not self._charset_probers:
+                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
+                # If we're checking non-CJK encodings, use single-byte prober
+                if self.lang_filter & LanguageFilter.NON_CJK:
+                    self._charset_probers.append(SBCSGroupProber())
+                self._charset_probers.append(Latin1Prober())
+            for prober in self._charset_probers:
+                if prober.feed(byte_str) == ProbingState.FOUND_IT:
+                    self.result = {'encoding': prober.charset_name,
+                                   'confidence': prober.get_confidence(),
+                                   'language': prober.language}
+                    self.done = True
+                    break
+            if self.WIN_BYTE_DETECTOR.search(byte_str):
+                self._has_win_bytes = True
+
+    def close(self):
+        """
+        Stop analyzing the current document and come up with a final
+        prediction.
+
+        :returns:  The ``result`` attribute, a ``dict`` with the keys
+                   `encoding`, `confidence`, and `language`.
+        """
+        # Don't bother with checks if we're already done
+        if self.done:
+            return self.result
+        self.done = True
+
+        if not self._got_data:
+            self.logger.debug('no data received!')
+
+        # Default to ASCII if it is all we've seen so far
+        elif self._input_state == InputState.PURE_ASCII:
+            self.result = {'encoding': 'ascii',
+                           'confidence': 1.0,
+                           'language': ''}
+
+        # If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
+        elif self._input_state == InputState.HIGH_BYTE:
+            prober_confidence = None
+            max_prober_confidence = 0.0
+            max_prober = None
+            for prober in self._charset_probers:
+                if not prober:
+                    continue
+                prober_confidence = prober.get_confidence()
+                if prober_confidence > max_prober_confidence:
+                    max_prober_confidence = prober_confidence
+                    max_prober = prober
+            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
+                charset_name = max_prober.charset_name
+                lower_charset_name = max_prober.charset_name.lower()
+                confidence = max_prober.get_confidence()
+                # Use Windows encoding name instead of ISO-8859 if we saw any
+                # extra Windows-specific bytes
+                if lower_charset_name.startswith('iso-8859'):
+                    if self._has_win_bytes:
+                        charset_name = self.ISO_WIN_MAP.get(lower_charset_name,
+                                                            charset_name)
+                self.result = {'encoding': charset_name,
+                               'confidence': confidence,
+                               'language': max_prober.language}
+
+        # Log all prober confidences if none met MINIMUM_THRESHOLD
+        if self.logger.getEffectiveLevel() == logging.DEBUG:
+            if self.result['encoding'] is None:
+                self.logger.debug('no probers hit minimum threshold')
+                for group_prober in self._charset_probers:
+                    if not group_prober:
+                        continue
+                    if isinstance(group_prober, CharSetGroupProber):
+                        for prober in group_prober.probers:
+                            self.logger.debug('%s %s confidence = %s',
+                                              prober.charset_name,
+                                              prober.language,
+                                              prober.get_confidence())
+                    else:
+                        self.logger.debug('%s %s confidence = %s',
+                                          prober.charset_name,
+                                          prober.language,
+                                          prober.get_confidence())
+        return self.result
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/utf8prober.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/utf8prober.py
new file mode 100644
index 00000000..6c3196cc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/utf8prober.py
@@ -0,0 +1,82 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState, MachineState
+from .codingstatemachine import CodingStateMachine
+from .mbcssm import UTF8_SM_MODEL
+
+
+
+class UTF8Prober(CharSetProber):
+    ONE_CHAR_PROB = 0.5
+
+    def __init__(self):
+        super(UTF8Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
+        self._num_mb_chars = None
+        self.reset()
+
+    def reset(self):
+        super(UTF8Prober, self).reset()
+        self.coding_sm.reset()
+        self._num_mb_chars = 0
+
+    @property
+    def charset_name(self):
+        return "utf-8"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            coding_state = self.coding_sm.next_state(c)
+            if coding_state == MachineState.ERROR:
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                if self.coding_sm.get_current_charlen() >= 2:
+                    self._num_mb_chars += 1
+
+        if self.state == ProbingState.DETECTING:
+            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        unlike = 0.99
+        if self._num_mb_chars < 6:
+            unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars
+            return 1.0 - unlike
+        else:
+            return unlike
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/version.py
new file mode 100644
index 00000000..bb2a34a7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/chardet/version.py
@@ -0,0 +1,9 @@
+"""
+This module exists only to simplify retrieving the version number of chardet
+from within setup.py and from chardet subpackages.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+__version__ = "3.0.4"
+VERSION = __version__.split('.')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__init__.py
new file mode 100644
index 00000000..2a3bf471
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__init__.py
@@ -0,0 +1,6 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from .initialise import init, deinit, reinit, colorama_text
+from .ansi import Fore, Back, Style, Cursor
+from .ansitowin32 import AnsiToWin32
+
+__version__ = '0.4.1'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..4267f01c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-37.pyc
new file mode 100644
index 00000000..1fd3491c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-37.pyc
new file mode 100644
index 00000000..b1360b54
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-37.pyc
new file mode 100644
index 00000000..7c1b7b63
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-37.pyc
new file mode 100644
index 00000000..6b854e0e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-37.pyc
new file mode 100644
index 00000000..4c2644a2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansi.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansi.py
new file mode 100644
index 00000000..78776588
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansi.py
@@ -0,0 +1,102 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+'''
+This module generates ANSI character codes to printing colors to terminals.
+See: http://en.wikipedia.org/wiki/ANSI_escape_code
+'''
+
+CSI = '\033['
+OSC = '\033]'
+BEL = '\007'
+
+
+def code_to_chars(code):
+    return CSI + str(code) + 'm'
+
+def set_title(title):
+    return OSC + '2;' + title + BEL
+
+def clear_screen(mode=2):
+    return CSI + str(mode) + 'J'
+
+def clear_line(mode=2):
+    return CSI + str(mode) + 'K'
+
+
+class AnsiCodes(object):
+    def __init__(self):
+        # the subclasses declare class attributes which are numbers.
+        # Upon instantiation we define instance attributes, which are the same
+        # as the class attributes but wrapped with the ANSI escape sequence
+        for name in dir(self):
+            if not name.startswith('_'):
+                value = getattr(self, name)
+                setattr(self, name, code_to_chars(value))
+
+
+class AnsiCursor(object):
+    def UP(self, n=1):
+        return CSI + str(n) + 'A'
+    def DOWN(self, n=1):
+        return CSI + str(n) + 'B'
+    def FORWARD(self, n=1):
+        return CSI + str(n) + 'C'
+    def BACK(self, n=1):
+        return CSI + str(n) + 'D'
+    def POS(self, x=1, y=1):
+        return CSI + str(y) + ';' + str(x) + 'H'
+
+
+class AnsiFore(AnsiCodes):
+    BLACK           = 30
+    RED             = 31
+    GREEN           = 32
+    YELLOW          = 33
+    BLUE            = 34
+    MAGENTA         = 35
+    CYAN            = 36
+    WHITE           = 37
+    RESET           = 39
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 90
+    LIGHTRED_EX     = 91
+    LIGHTGREEN_EX   = 92
+    LIGHTYELLOW_EX  = 93
+    LIGHTBLUE_EX    = 94
+    LIGHTMAGENTA_EX = 95
+    LIGHTCYAN_EX    = 96
+    LIGHTWHITE_EX   = 97
+
+
+class AnsiBack(AnsiCodes):
+    BLACK           = 40
+    RED             = 41
+    GREEN           = 42
+    YELLOW          = 43
+    BLUE            = 44
+    MAGENTA         = 45
+    CYAN            = 46
+    WHITE           = 47
+    RESET           = 49
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 100
+    LIGHTRED_EX     = 101
+    LIGHTGREEN_EX   = 102
+    LIGHTYELLOW_EX  = 103
+    LIGHTBLUE_EX    = 104
+    LIGHTMAGENTA_EX = 105
+    LIGHTCYAN_EX    = 106
+    LIGHTWHITE_EX   = 107
+
+
+class AnsiStyle(AnsiCodes):
+    BRIGHT    = 1
+    DIM       = 2
+    NORMAL    = 22
+    RESET_ALL = 0
+
+Fore   = AnsiFore()
+Back   = AnsiBack()
+Style  = AnsiStyle()
+Cursor = AnsiCursor()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansitowin32.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansitowin32.py
new file mode 100644
index 00000000..359c92be
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/ansitowin32.py
@@ -0,0 +1,257 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import re
+import sys
+import os
+
+from .ansi import AnsiFore, AnsiBack, AnsiStyle, Style
+from .winterm import WinTerm, WinColor, WinStyle
+from .win32 import windll, winapi_test
+
+
+winterm = None
+if windll is not None:
+    winterm = WinTerm()
+
+
+class StreamWrapper(object):
+    '''
+    Wraps a stream (such as stdout), acting as a transparent proxy for all
+    attribute access apart from method 'write()', which is delegated to our
+    Converter instance.
+    '''
+    def __init__(self, wrapped, converter):
+        # double-underscore everything to prevent clashes with names of
+        # attributes on the wrapped stream object.
+        self.__wrapped = wrapped
+        self.__convertor = converter
+
+    def __getattr__(self, name):
+        return getattr(self.__wrapped, name)
+
+    def __enter__(self, *args, **kwargs):
+        # special method lookup bypasses __getattr__/__getattribute__, see
+        # https://stackoverflow.com/questions/12632894/why-doesnt-getattr-work-with-exit
+        # thus, contextlib magic methods are not proxied via __getattr__
+        return self.__wrapped.__enter__(*args, **kwargs)
+
+    def __exit__(self, *args, **kwargs):
+        return self.__wrapped.__exit__(*args, **kwargs)
+
+    def write(self, text):
+        self.__convertor.write(text)
+
+    def isatty(self):
+        stream = self.__wrapped
+        if 'PYCHARM_HOSTED' in os.environ:
+            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
+                return True
+        try:
+            stream_isatty = stream.isatty
+        except AttributeError:
+            return False
+        else:
+            return stream_isatty()
+
+    @property
+    def closed(self):
+        stream = self.__wrapped
+        try:
+            return stream.closed
+        except AttributeError:
+            return True
+
+
+class AnsiToWin32(object):
+    '''
+    Implements a 'write()' method which, on Windows, will strip ANSI character
+    sequences from the text, and if outputting to a tty, will convert them into
+    win32 function calls.
+    '''
+    ANSI_CSI_RE = re.compile('\001?\033\\[((?:\\d|;)*)([a-zA-Z])\002?')   # Control Sequence Introducer
+    ANSI_OSC_RE = re.compile('\001?\033\\]((?:.|;)*?)(\x07)\002?')        # Operating System Command
+
+    def __init__(self, wrapped, convert=None, strip=None, autoreset=False):
+        # The wrapped stream (normally sys.stdout or sys.stderr)
+        self.wrapped = wrapped
+
+        # should we reset colors to defaults after every .write()
+        self.autoreset = autoreset
+
+        # create the proxy wrapping our output stream
+        self.stream = StreamWrapper(wrapped, self)
+
+        on_windows = os.name == 'nt'
+        # We test if the WinAPI works, because even if we are on Windows
+        # we may be using a terminal that doesn't support the WinAPI
+        # (e.g. Cygwin Terminal). In this case it's up to the terminal
+        # to support the ANSI codes.
+        conversion_supported = on_windows and winapi_test()
+
+        # should we strip ANSI sequences from our output?
+        if strip is None:
+            strip = conversion_supported or (not self.stream.closed and not self.stream.isatty())
+        self.strip = strip
+
+        # should we should convert ANSI sequences into win32 calls?
+        if convert is None:
+            convert = conversion_supported and not self.stream.closed and self.stream.isatty()
+        self.convert = convert
+
+        # dict of ansi codes to win32 functions and parameters
+        self.win32_calls = self.get_win32_calls()
+
+        # are we wrapping stderr?
+        self.on_stderr = self.wrapped is sys.stderr
+
+    def should_wrap(self):
+        '''
+        True if this class is actually needed. If false, then the output
+        stream will not be affected, nor will win32 calls be issued, so
+        wrapping stdout is not actually required. This will generally be
+        False on non-Windows platforms, unless optional functionality like
+        autoreset has been requested using kwargs to init()
+        '''
+        return self.convert or self.strip or self.autoreset
+
+    def get_win32_calls(self):
+        if self.convert and winterm:
+            return {
+                AnsiStyle.RESET_ALL: (winterm.reset_all, ),
+                AnsiStyle.BRIGHT: (winterm.style, WinStyle.BRIGHT),
+                AnsiStyle.DIM: (winterm.style, WinStyle.NORMAL),
+                AnsiStyle.NORMAL: (winterm.style, WinStyle.NORMAL),
+                AnsiFore.BLACK: (winterm.fore, WinColor.BLACK),
+                AnsiFore.RED: (winterm.fore, WinColor.RED),
+                AnsiFore.GREEN: (winterm.fore, WinColor.GREEN),
+                AnsiFore.YELLOW: (winterm.fore, WinColor.YELLOW),
+                AnsiFore.BLUE: (winterm.fore, WinColor.BLUE),
+                AnsiFore.MAGENTA: (winterm.fore, WinColor.MAGENTA),
+                AnsiFore.CYAN: (winterm.fore, WinColor.CYAN),
+                AnsiFore.WHITE: (winterm.fore, WinColor.GREY),
+                AnsiFore.RESET: (winterm.fore, ),
+                AnsiFore.LIGHTBLACK_EX: (winterm.fore, WinColor.BLACK, True),
+                AnsiFore.LIGHTRED_EX: (winterm.fore, WinColor.RED, True),
+                AnsiFore.LIGHTGREEN_EX: (winterm.fore, WinColor.GREEN, True),
+                AnsiFore.LIGHTYELLOW_EX: (winterm.fore, WinColor.YELLOW, True),
+                AnsiFore.LIGHTBLUE_EX: (winterm.fore, WinColor.BLUE, True),
+                AnsiFore.LIGHTMAGENTA_EX: (winterm.fore, WinColor.MAGENTA, True),
+                AnsiFore.LIGHTCYAN_EX: (winterm.fore, WinColor.CYAN, True),
+                AnsiFore.LIGHTWHITE_EX: (winterm.fore, WinColor.GREY, True),
+                AnsiBack.BLACK: (winterm.back, WinColor.BLACK),
+                AnsiBack.RED: (winterm.back, WinColor.RED),
+                AnsiBack.GREEN: (winterm.back, WinColor.GREEN),
+                AnsiBack.YELLOW: (winterm.back, WinColor.YELLOW),
+                AnsiBack.BLUE: (winterm.back, WinColor.BLUE),
+                AnsiBack.MAGENTA: (winterm.back, WinColor.MAGENTA),
+                AnsiBack.CYAN: (winterm.back, WinColor.CYAN),
+                AnsiBack.WHITE: (winterm.back, WinColor.GREY),
+                AnsiBack.RESET: (winterm.back, ),
+                AnsiBack.LIGHTBLACK_EX: (winterm.back, WinColor.BLACK, True),
+                AnsiBack.LIGHTRED_EX: (winterm.back, WinColor.RED, True),
+                AnsiBack.LIGHTGREEN_EX: (winterm.back, WinColor.GREEN, True),
+                AnsiBack.LIGHTYELLOW_EX: (winterm.back, WinColor.YELLOW, True),
+                AnsiBack.LIGHTBLUE_EX: (winterm.back, WinColor.BLUE, True),
+                AnsiBack.LIGHTMAGENTA_EX: (winterm.back, WinColor.MAGENTA, True),
+                AnsiBack.LIGHTCYAN_EX: (winterm.back, WinColor.CYAN, True),
+                AnsiBack.LIGHTWHITE_EX: (winterm.back, WinColor.GREY, True),
+            }
+        return dict()
+
+    def write(self, text):
+        if self.strip or self.convert:
+            self.write_and_convert(text)
+        else:
+            self.wrapped.write(text)
+            self.wrapped.flush()
+        if self.autoreset:
+            self.reset_all()
+
+
+    def reset_all(self):
+        if self.convert:
+            self.call_win32('m', (0,))
+        elif not self.strip and not self.stream.closed:
+            self.wrapped.write(Style.RESET_ALL)
+
+
+    def write_and_convert(self, text):
+        '''
+        Write the given text to our wrapped stream, stripping any ANSI
+        sequences from the text, and optionally converting them into win32
+        calls.
+        '''
+        cursor = 0
+        text = self.convert_osc(text)
+        for match in self.ANSI_CSI_RE.finditer(text):
+            start, end = match.span()
+            self.write_plain_text(text, cursor, start)
+            self.convert_ansi(*match.groups())
+            cursor = end
+        self.write_plain_text(text, cursor, len(text))
+
+
+    def write_plain_text(self, text, start, end):
+        if start < end:
+            self.wrapped.write(text[start:end])
+            self.wrapped.flush()
+
+
+    def convert_ansi(self, paramstring, command):
+        if self.convert:
+            params = self.extract_params(command, paramstring)
+            self.call_win32(command, params)
+
+
+    def extract_params(self, command, paramstring):
+        if command in 'Hf':
+            params = tuple(int(p) if len(p) != 0 else 1 for p in paramstring.split(';'))
+            while len(params) < 2:
+                # defaults:
+                params = params + (1,)
+        else:
+            params = tuple(int(p) for p in paramstring.split(';') if len(p) != 0)
+            if len(params) == 0:
+                # defaults:
+                if command in 'JKm':
+                    params = (0,)
+                elif command in 'ABCD':
+                    params = (1,)
+
+        return params
+
+
+    def call_win32(self, command, params):
+        if command == 'm':
+            for param in params:
+                if param in self.win32_calls:
+                    func_args = self.win32_calls[param]
+                    func = func_args[0]
+                    args = func_args[1:]
+                    kwargs = dict(on_stderr=self.on_stderr)
+                    func(*args, **kwargs)
+        elif command in 'J':
+            winterm.erase_screen(params[0], on_stderr=self.on_stderr)
+        elif command in 'K':
+            winterm.erase_line(params[0], on_stderr=self.on_stderr)
+        elif command in 'Hf':     # cursor position - absolute
+            winterm.set_cursor_position(params, on_stderr=self.on_stderr)
+        elif command in 'ABCD':   # cursor position - relative
+            n = params[0]
+            # A - up, B - down, C - forward, D - back
+            x, y = {'A': (0, -n), 'B': (0, n), 'C': (n, 0), 'D': (-n, 0)}[command]
+            winterm.cursor_adjust(x, y, on_stderr=self.on_stderr)
+
+
+    def convert_osc(self, text):
+        for match in self.ANSI_OSC_RE.finditer(text):
+            start, end = match.span()
+            text = text[:start] + text[end:]
+            paramstring, command = match.groups()
+            if command in '\x07':       # \x07 = BEL
+                params = paramstring.split(";")
+                # 0 - change title and icon (we will only change title)
+                # 1 - change icon (we don't support this)
+                # 2 - change title
+                if params[0] in '02':
+                    winterm.set_title(params[1])
+        return text
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/initialise.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/initialise.py
new file mode 100644
index 00000000..430d0668
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/initialise.py
@@ -0,0 +1,80 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import atexit
+import contextlib
+import sys
+
+from .ansitowin32 import AnsiToWin32
+
+
+orig_stdout = None
+orig_stderr = None
+
+wrapped_stdout = None
+wrapped_stderr = None
+
+atexit_done = False
+
+
+def reset_all():
+    if AnsiToWin32 is not None:    # Issue #74: objects might become None at exit
+        AnsiToWin32(orig_stdout).reset_all()
+
+
+def init(autoreset=False, convert=None, strip=None, wrap=True):
+
+    if not wrap and any([autoreset, convert, strip]):
+        raise ValueError('wrap=False conflicts with any other arg=True')
+
+    global wrapped_stdout, wrapped_stderr
+    global orig_stdout, orig_stderr
+
+    orig_stdout = sys.stdout
+    orig_stderr = sys.stderr
+
+    if sys.stdout is None:
+        wrapped_stdout = None
+    else:
+        sys.stdout = wrapped_stdout = \
+            wrap_stream(orig_stdout, convert, strip, autoreset, wrap)
+    if sys.stderr is None:
+        wrapped_stderr = None
+    else:
+        sys.stderr = wrapped_stderr = \
+            wrap_stream(orig_stderr, convert, strip, autoreset, wrap)
+
+    global atexit_done
+    if not atexit_done:
+        atexit.register(reset_all)
+        atexit_done = True
+
+
+def deinit():
+    if orig_stdout is not None:
+        sys.stdout = orig_stdout
+    if orig_stderr is not None:
+        sys.stderr = orig_stderr
+
+
+@contextlib.contextmanager
+def colorama_text(*args, **kwargs):
+    init(*args, **kwargs)
+    try:
+        yield
+    finally:
+        deinit()
+
+
+def reinit():
+    if wrapped_stdout is not None:
+        sys.stdout = wrapped_stdout
+    if wrapped_stderr is not None:
+        sys.stderr = wrapped_stderr
+
+
+def wrap_stream(stream, convert, strip, autoreset, wrap):
+    if wrap:
+        wrapper = AnsiToWin32(stream,
+            convert=convert, strip=strip, autoreset=autoreset)
+        if wrapper.should_wrap():
+            stream = wrapper.stream
+    return stream
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/win32.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/win32.py
new file mode 100644
index 00000000..c2d83603
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/win32.py
@@ -0,0 +1,152 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+
+# from winbase.h
+STDOUT = -11
+STDERR = -12
+
+try:
+    import ctypes
+    from ctypes import LibraryLoader
+    windll = LibraryLoader(ctypes.WinDLL)
+    from ctypes import wintypes
+except (AttributeError, ImportError):
+    windll = None
+    SetConsoleTextAttribute = lambda *_: None
+    winapi_test = lambda *_: None
+else:
+    from ctypes import byref, Structure, c_char, POINTER
+
+    COORD = wintypes._COORD
+
+    class CONSOLE_SCREEN_BUFFER_INFO(Structure):
+        """struct in wincon.h."""
+        _fields_ = [
+            ("dwSize", COORD),
+            ("dwCursorPosition", COORD),
+            ("wAttributes", wintypes.WORD),
+            ("srWindow", wintypes.SMALL_RECT),
+            ("dwMaximumWindowSize", COORD),
+        ]
+        def __str__(self):
+            return '(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)' % (
+                self.dwSize.Y, self.dwSize.X
+                , self.dwCursorPosition.Y, self.dwCursorPosition.X
+                , self.wAttributes
+                , self.srWindow.Top, self.srWindow.Left, self.srWindow.Bottom, self.srWindow.Right
+                , self.dwMaximumWindowSize.Y, self.dwMaximumWindowSize.X
+            )
+
+    _GetStdHandle = windll.kernel32.GetStdHandle
+    _GetStdHandle.argtypes = [
+        wintypes.DWORD,
+    ]
+    _GetStdHandle.restype = wintypes.HANDLE
+
+    _GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo
+    _GetConsoleScreenBufferInfo.argtypes = [
+        wintypes.HANDLE,
+        POINTER(CONSOLE_SCREEN_BUFFER_INFO),
+    ]
+    _GetConsoleScreenBufferInfo.restype = wintypes.BOOL
+
+    _SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute
+    _SetConsoleTextAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+    ]
+    _SetConsoleTextAttribute.restype = wintypes.BOOL
+
+    _SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition
+    _SetConsoleCursorPosition.argtypes = [
+        wintypes.HANDLE,
+        COORD,
+    ]
+    _SetConsoleCursorPosition.restype = wintypes.BOOL
+
+    _FillConsoleOutputCharacterA = windll.kernel32.FillConsoleOutputCharacterA
+    _FillConsoleOutputCharacterA.argtypes = [
+        wintypes.HANDLE,
+        c_char,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputCharacterA.restype = wintypes.BOOL
+
+    _FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute
+    _FillConsoleOutputAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputAttribute.restype = wintypes.BOOL
+
+    _SetConsoleTitleW = windll.kernel32.SetConsoleTitleW
+    _SetConsoleTitleW.argtypes = [
+        wintypes.LPCWSTR
+    ]
+    _SetConsoleTitleW.restype = wintypes.BOOL
+
+    def _winapi_test(handle):
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return bool(success)
+
+    def winapi_test():
+        return any(_winapi_test(h) for h in
+                   (_GetStdHandle(STDOUT), _GetStdHandle(STDERR)))
+
+    def GetConsoleScreenBufferInfo(stream_id=STDOUT):
+        handle = _GetStdHandle(stream_id)
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return csbi
+
+    def SetConsoleTextAttribute(stream_id, attrs):
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleTextAttribute(handle, attrs)
+
+    def SetConsoleCursorPosition(stream_id, position, adjust=True):
+        position = COORD(*position)
+        # If the position is out of range, do nothing.
+        if position.Y <= 0 or position.X <= 0:
+            return
+        # Adjust for Windows' SetConsoleCursorPosition:
+        #    1. being 0-based, while ANSI is 1-based.
+        #    2. expecting (x,y), while ANSI uses (y,x).
+        adjusted_position = COORD(position.Y - 1, position.X - 1)
+        if adjust:
+            # Adjust for viewport's scroll position
+            sr = GetConsoleScreenBufferInfo(STDOUT).srWindow
+            adjusted_position.Y += sr.Top
+            adjusted_position.X += sr.Left
+        # Resume normal processing
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleCursorPosition(handle, adjusted_position)
+
+    def FillConsoleOutputCharacter(stream_id, char, length, start):
+        handle = _GetStdHandle(stream_id)
+        char = c_char(char.encode())
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        success = _FillConsoleOutputCharacterA(
+            handle, char, length, start, byref(num_written))
+        return num_written.value
+
+    def FillConsoleOutputAttribute(stream_id, attr, length, start):
+        ''' FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten )'''
+        handle = _GetStdHandle(stream_id)
+        attribute = wintypes.WORD(attr)
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        return _FillConsoleOutputAttribute(
+            handle, attribute, length, start, byref(num_written))
+
+    def SetConsoleTitle(title):
+        return _SetConsoleTitleW(title)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/winterm.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/winterm.py
new file mode 100644
index 00000000..0fdb4ec4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/colorama/winterm.py
@@ -0,0 +1,169 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from . import win32
+
+
+# from wincon.h
+class WinColor(object):
+    BLACK   = 0
+    BLUE    = 1
+    GREEN   = 2
+    CYAN    = 3
+    RED     = 4
+    MAGENTA = 5
+    YELLOW  = 6
+    GREY    = 7
+
+# from wincon.h
+class WinStyle(object):
+    NORMAL              = 0x00 # dim text, dim background
+    BRIGHT              = 0x08 # bright text, dim background
+    BRIGHT_BACKGROUND   = 0x80 # dim text, bright background
+
+class WinTerm(object):
+
+    def __init__(self):
+        self._default = win32.GetConsoleScreenBufferInfo(win32.STDOUT).wAttributes
+        self.set_attrs(self._default)
+        self._default_fore = self._fore
+        self._default_back = self._back
+        self._default_style = self._style
+        # In order to emulate LIGHT_EX in windows, we borrow the BRIGHT style.
+        # So that LIGHT_EX colors and BRIGHT style do not clobber each other,
+        # we track them separately, since LIGHT_EX is overwritten by Fore/Back
+        # and BRIGHT is overwritten by Style codes.
+        self._light = 0
+
+    def get_attrs(self):
+        return self._fore + self._back * 16 + (self._style | self._light)
+
+    def set_attrs(self, value):
+        self._fore = value & 7
+        self._back = (value >> 4) & 7
+        self._style = value & (WinStyle.BRIGHT | WinStyle.BRIGHT_BACKGROUND)
+
+    def reset_all(self, on_stderr=None):
+        self.set_attrs(self._default)
+        self.set_console(attrs=self._default)
+        self._light = 0
+
+    def fore(self, fore=None, light=False, on_stderr=False):
+        if fore is None:
+            fore = self._default_fore
+        self._fore = fore
+        # Emulate LIGHT_EX with BRIGHT Style
+        if light:
+            self._light |= WinStyle.BRIGHT
+        else:
+            self._light &= ~WinStyle.BRIGHT
+        self.set_console(on_stderr=on_stderr)
+
+    def back(self, back=None, light=False, on_stderr=False):
+        if back is None:
+            back = self._default_back
+        self._back = back
+        # Emulate LIGHT_EX with BRIGHT_BACKGROUND Style
+        if light:
+            self._light |= WinStyle.BRIGHT_BACKGROUND
+        else:
+            self._light &= ~WinStyle.BRIGHT_BACKGROUND
+        self.set_console(on_stderr=on_stderr)
+
+    def style(self, style=None, on_stderr=False):
+        if style is None:
+            style = self._default_style
+        self._style = style
+        self.set_console(on_stderr=on_stderr)
+
+    def set_console(self, attrs=None, on_stderr=False):
+        if attrs is None:
+            attrs = self.get_attrs()
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleTextAttribute(handle, attrs)
+
+    def get_position(self, handle):
+        position = win32.GetConsoleScreenBufferInfo(handle).dwCursorPosition
+        # Because Windows coordinates are 0-based,
+        # and win32.SetConsoleCursorPosition expects 1-based.
+        position.X += 1
+        position.Y += 1
+        return position
+
+    def set_cursor_position(self, position=None, on_stderr=False):
+        if position is None:
+            # I'm not currently tracking the position, so there is no default.
+            # position = self.get_position()
+            return
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleCursorPosition(handle, position)
+
+    def cursor_adjust(self, x, y, on_stderr=False):
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        position = self.get_position(handle)
+        adjusted_position = (position.Y + y, position.X + x)
+        win32.SetConsoleCursorPosition(handle, adjusted_position, adjust=False)
+
+    def erase_screen(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the screen.
+        # 1 should clear from the cursor to the beginning of the screen.
+        # 2 should clear the entire screen, and move cursor to (1,1)
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        # get the number of character cells in the current buffer
+        cells_in_screen = csbi.dwSize.X * csbi.dwSize.Y
+        # get number of character cells before current cursor position
+        cells_before_cursor = csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = cells_in_screen - cells_before_cursor
+        elif mode == 1:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_before_cursor
+        elif mode == 2:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_in_screen
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+        if mode == 2:
+            # put the cursor where needed
+            win32.SetConsoleCursorPosition(handle, (1, 1))
+
+    def erase_line(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the line.
+        # 1 should clear from the cursor to the beginning of the line.
+        # 2 should clear the entire line.
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = csbi.dwSize.X - csbi.dwCursorPosition.X
+        elif mode == 1:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwCursorPosition.X
+        elif mode == 2:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwSize.X
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+
+    def set_title(self, title):
+        win32.SetConsoleTitle(title)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__init__.py
new file mode 100644
index 00000000..a2d70d47
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__init__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2019 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import logging
+
+__version__ = '0.2.9.post0'
+
+class DistlibException(Exception):
+    pass
+
+try:
+    from logging import NullHandler
+except ImportError: # pragma: no cover
+    class NullHandler(logging.Handler):
+        def handle(self, record): pass
+        def emit(self, record): pass
+        def createLock(self): self.lock = None
+
+logger = logging.getLogger(__name__)
+logger.addHandler(NullHandler())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..8aabfc7c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-37.pyc
new file mode 100644
index 00000000..89efcb87
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/database.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/database.cpython-37.pyc
new file mode 100644
index 00000000..87abd078
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/database.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/index.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/index.cpython-37.pyc
new file mode 100644
index 00000000..b8553271
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/index.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/locators.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/locators.cpython-37.pyc
new file mode 100644
index 00000000..280db9d3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/locators.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/manifest.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/manifest.cpython-37.pyc
new file mode 100644
index 00000000..8ad8fe82
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/manifest.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/markers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/markers.cpython-37.pyc
new file mode 100644
index 00000000..e23fd05a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/markers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/metadata.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/metadata.cpython-37.pyc
new file mode 100644
index 00000000..f291d9bb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/metadata.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/resources.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/resources.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/resources.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/scripts.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/scripts.cpython-37.pyc
new file mode 100644
index 00000000..5cafe3ab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/scripts.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/util.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/util.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/util.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/version.cpython-37.pyc
new file mode 100644
index 00000000..030da583
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/wheel.cpython-37.pyc
new file mode 100644
index 00000000..95a7523f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/__pycache__/wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__init__.py
new file mode 100644
index 00000000..f7dbf4c9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__init__.py
@@ -0,0 +1,6 @@
+"""Modules copied from Python 3 standard libraries, for internal use only.
+
+Individual classes and functions are found in d2._backport.misc.  Intended
+usage is to always import things missing from 3.1 from that module: the
+built-in/stdlib objects will be used if found.
+"""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..bf76a7f2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/misc.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/misc.cpython-37.pyc
new file mode 100644
index 00000000..3a3d916c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/misc.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/shutil.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/shutil.cpython-37.pyc
new file mode 100644
index 00000000..a8f71d48
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/shutil.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/sysconfig.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/sysconfig.cpython-37.pyc
new file mode 100644
index 00000000..39cbe33a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/sysconfig.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/tarfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/tarfile.cpython-37.pyc
new file mode 100644
index 00000000..5cccc9b7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/__pycache__/tarfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/misc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/misc.py
new file mode 100644
index 00000000..cfb318d3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/misc.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Backports for individual classes and functions."""
+
+import os
+import sys
+
+__all__ = ['cache_from_source', 'callable', 'fsencode']
+
+
+try:
+    from imp import cache_from_source
+except ImportError:
+    def cache_from_source(py_file, debug=__debug__):
+        ext = debug and 'c' or 'o'
+        return py_file + ext
+
+
+try:
+    callable = callable
+except NameError:
+    from collections import Callable
+
+    def callable(obj):
+        return isinstance(obj, Callable)
+
+
+try:
+    fsencode = os.fsencode
+except AttributeError:
+    def fsencode(filename):
+        if isinstance(filename, bytes):
+            return filename
+        elif isinstance(filename, str):
+            return filename.encode(sys.getfilesystemencoding())
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/shutil.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/shutil.py
new file mode 100644
index 00000000..159e49ee
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/shutil.py
@@ -0,0 +1,761 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Utility functions for copying and archiving files and directory trees.
+
+XXX The functions here don't copy the resource fork or other metadata on Mac.
+
+"""
+
+import os
+import sys
+import stat
+from os.path import abspath
+import fnmatch
+import collections
+import errno
+from . import tarfile
+
+try:
+    import bz2
+    _BZ2_SUPPORTED = True
+except ImportError:
+    _BZ2_SUPPORTED = False
+
+try:
+    from pwd import getpwnam
+except ImportError:
+    getpwnam = None
+
+try:
+    from grp import getgrnam
+except ImportError:
+    getgrnam = None
+
+__all__ = ["copyfileobj", "copyfile", "copymode", "copystat", "copy", "copy2",
+           "copytree", "move", "rmtree", "Error", "SpecialFileError",
+           "ExecError", "make_archive", "get_archive_formats",
+           "register_archive_format", "unregister_archive_format",
+           "get_unpack_formats", "register_unpack_format",
+           "unregister_unpack_format", "unpack_archive", "ignore_patterns"]
+
+class Error(EnvironmentError):
+    pass
+
+class SpecialFileError(EnvironmentError):
+    """Raised when trying to do a kind of operation (e.g. copying) which is
+    not supported on a special file (e.g. a named pipe)"""
+
+class ExecError(EnvironmentError):
+    """Raised when a command could not be executed"""
+
+class ReadError(EnvironmentError):
+    """Raised when an archive cannot be read"""
+
+class RegistryError(Exception):
+    """Raised when a registry operation with the archiving
+    and unpacking registries fails"""
+
+
+try:
+    WindowsError
+except NameError:
+    WindowsError = None
+
+def copyfileobj(fsrc, fdst, length=16*1024):
+    """copy data from file-like object fsrc to file-like object fdst"""
+    while 1:
+        buf = fsrc.read(length)
+        if not buf:
+            break
+        fdst.write(buf)
+
+def _samefile(src, dst):
+    # Macintosh, Unix.
+    if hasattr(os.path, 'samefile'):
+        try:
+            return os.path.samefile(src, dst)
+        except OSError:
+            return False
+
+    # All other platforms: check for same pathname.
+    return (os.path.normcase(os.path.abspath(src)) ==
+            os.path.normcase(os.path.abspath(dst)))
+
+def copyfile(src, dst):
+    """Copy data from src to dst"""
+    if _samefile(src, dst):
+        raise Error("`%s` and `%s` are the same file" % (src, dst))
+
+    for fn in [src, dst]:
+        try:
+            st = os.stat(fn)
+        except OSError:
+            # File most likely does not exist
+            pass
+        else:
+            # XXX What about other special files? (sockets, devices...)
+            if stat.S_ISFIFO(st.st_mode):
+                raise SpecialFileError("`%s` is a named pipe" % fn)
+
+    with open(src, 'rb') as fsrc:
+        with open(dst, 'wb') as fdst:
+            copyfileobj(fsrc, fdst)
+
+def copymode(src, dst):
+    """Copy mode bits from src to dst"""
+    if hasattr(os, 'chmod'):
+        st = os.stat(src)
+        mode = stat.S_IMODE(st.st_mode)
+        os.chmod(dst, mode)
+
+def copystat(src, dst):
+    """Copy all stat info (mode bits, atime, mtime, flags) from src to dst"""
+    st = os.stat(src)
+    mode = stat.S_IMODE(st.st_mode)
+    if hasattr(os, 'utime'):
+        os.utime(dst, (st.st_atime, st.st_mtime))
+    if hasattr(os, 'chmod'):
+        os.chmod(dst, mode)
+    if hasattr(os, 'chflags') and hasattr(st, 'st_flags'):
+        try:
+            os.chflags(dst, st.st_flags)
+        except OSError as why:
+            if (not hasattr(errno, 'EOPNOTSUPP') or
+                why.errno != errno.EOPNOTSUPP):
+                raise
+
+def copy(src, dst):
+    """Copy data and mode bits ("cp src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copymode(src, dst)
+
+def copy2(src, dst):
+    """Copy data and all stat info ("cp -p src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copystat(src, dst)
+
+def ignore_patterns(*patterns):
+    """Function that can be used as copytree() ignore parameter.
+
+    Patterns is a sequence of glob-style patterns
+    that are used to exclude files"""
+    def _ignore_patterns(path, names):
+        ignored_names = []
+        for pattern in patterns:
+            ignored_names.extend(fnmatch.filter(names, pattern))
+        return set(ignored_names)
+    return _ignore_patterns
+
+def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
+             ignore_dangling_symlinks=False):
+    """Recursively copy a directory tree.
+
+    The destination directory must not already exist.
+    If exception(s) occur, an Error is raised with a list of reasons.
+
+    If the optional symlinks flag is true, symbolic links in the
+    source tree result in symbolic links in the destination tree; if
+    it is false, the contents of the files pointed to by symbolic
+    links are copied. If the file pointed by the symlink doesn't
+    exist, an exception will be added in the list of errors raised in
+    an Error exception at the end of the copy process.
+
+    You can set the optional ignore_dangling_symlinks flag to true if you
+    want to silence this exception. Notice that this has no effect on
+    platforms that don't support os.symlink.
+
+    The optional ignore argument is a callable. If given, it
+    is called with the `src` parameter, which is the directory
+    being visited by copytree(), and `names` which is the list of
+    `src` contents, as returned by os.listdir():
+
+        callable(src, names) -> ignored_names
+
+    Since copytree() is called recursively, the callable will be
+    called once for each directory that is copied. It returns a
+    list of names relative to the `src` directory that should
+    not be copied.
+
+    The optional copy_function argument is a callable that will be used
+    to copy each file. It will be called with the source path and the
+    destination path as arguments. By default, copy2() is used, but any
+    function that supports the same signature (like copy()) can be used.
+
+    """
+    names = os.listdir(src)
+    if ignore is not None:
+        ignored_names = ignore(src, names)
+    else:
+        ignored_names = set()
+
+    os.makedirs(dst)
+    errors = []
+    for name in names:
+        if name in ignored_names:
+            continue
+        srcname = os.path.join(src, name)
+        dstname = os.path.join(dst, name)
+        try:
+            if os.path.islink(srcname):
+                linkto = os.readlink(srcname)
+                if symlinks:
+                    os.symlink(linkto, dstname)
+                else:
+                    # ignore dangling symlink if the flag is on
+                    if not os.path.exists(linkto) and ignore_dangling_symlinks:
+                        continue
+                    # otherwise let the copy occurs. copy2 will raise an error
+                    copy_function(srcname, dstname)
+            elif os.path.isdir(srcname):
+                copytree(srcname, dstname, symlinks, ignore, copy_function)
+            else:
+                # Will raise a SpecialFileError for unsupported file types
+                copy_function(srcname, dstname)
+        # catch the Error from the recursive copytree so that we can
+        # continue with other files
+        except Error as err:
+            errors.extend(err.args[0])
+        except EnvironmentError as why:
+            errors.append((srcname, dstname, str(why)))
+    try:
+        copystat(src, dst)
+    except OSError as why:
+        if WindowsError is not None and isinstance(why, WindowsError):
+            # Copying file access times may fail on Windows
+            pass
+        else:
+            errors.extend((src, dst, str(why)))
+    if errors:
+        raise Error(errors)
+
+def rmtree(path, ignore_errors=False, onerror=None):
+    """Recursively delete a directory tree.
+
+    If ignore_errors is set, errors are ignored; otherwise, if onerror
+    is set, it is called to handle the error with arguments (func,
+    path, exc_info) where func is os.listdir, os.remove, or os.rmdir;
+    path is the argument to that function that caused it to fail; and
+    exc_info is a tuple returned by sys.exc_info().  If ignore_errors
+    is false and onerror is None, an exception is raised.
+
+    """
+    if ignore_errors:
+        def onerror(*args):
+            pass
+    elif onerror is None:
+        def onerror(*args):
+            raise
+    try:
+        if os.path.islink(path):
+            # symlinks to directories are forbidden, see bug #1669
+            raise OSError("Cannot call rmtree on a symbolic link")
+    except OSError:
+        onerror(os.path.islink, path, sys.exc_info())
+        # can't continue even if onerror hook returns
+        return
+    names = []
+    try:
+        names = os.listdir(path)
+    except os.error:
+        onerror(os.listdir, path, sys.exc_info())
+    for name in names:
+        fullname = os.path.join(path, name)
+        try:
+            mode = os.lstat(fullname).st_mode
+        except os.error:
+            mode = 0
+        if stat.S_ISDIR(mode):
+            rmtree(fullname, ignore_errors, onerror)
+        else:
+            try:
+                os.remove(fullname)
+            except os.error:
+                onerror(os.remove, fullname, sys.exc_info())
+    try:
+        os.rmdir(path)
+    except os.error:
+        onerror(os.rmdir, path, sys.exc_info())
+
+
+def _basename(path):
+    # A basename() variant which first strips the trailing slash, if present.
+    # Thus we always get the last component of the path, even for directories.
+    return os.path.basename(path.rstrip(os.path.sep))
+
+def move(src, dst):
+    """Recursively move a file or directory to another location. This is
+    similar to the Unix "mv" command.
+
+    If the destination is a directory or a symlink to a directory, the source
+    is moved inside the directory. The destination path must not already
+    exist.
+
+    If the destination already exists but is not a directory, it may be
+    overwritten depending on os.rename() semantics.
+
+    If the destination is on our current filesystem, then rename() is used.
+    Otherwise, src is copied to the destination and then removed.
+    A lot more could be done here...  A look at a mv.c shows a lot of
+    the issues this implementation glosses over.
+
+    """
+    real_dst = dst
+    if os.path.isdir(dst):
+        if _samefile(src, dst):
+            # We might be on a case insensitive filesystem,
+            # perform the rename anyway.
+            os.rename(src, dst)
+            return
+
+        real_dst = os.path.join(dst, _basename(src))
+        if os.path.exists(real_dst):
+            raise Error("Destination path '%s' already exists" % real_dst)
+    try:
+        os.rename(src, real_dst)
+    except OSError:
+        if os.path.isdir(src):
+            if _destinsrc(src, dst):
+                raise Error("Cannot move a directory '%s' into itself '%s'." % (src, dst))
+            copytree(src, real_dst, symlinks=True)
+            rmtree(src)
+        else:
+            copy2(src, real_dst)
+            os.unlink(src)
+
+def _destinsrc(src, dst):
+    src = abspath(src)
+    dst = abspath(dst)
+    if not src.endswith(os.path.sep):
+        src += os.path.sep
+    if not dst.endswith(os.path.sep):
+        dst += os.path.sep
+    return dst.startswith(src)
+
+def _get_gid(name):
+    """Returns a gid, given a group name."""
+    if getgrnam is None or name is None:
+        return None
+    try:
+        result = getgrnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+def _get_uid(name):
+    """Returns an uid, given a user name."""
+    if getpwnam is None or name is None:
+        return None
+    try:
+        result = getpwnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+def _make_tarball(base_name, base_dir, compress="gzip", verbose=0, dry_run=0,
+                  owner=None, group=None, logger=None):
+    """Create a (possibly compressed) tar file from all the files under
+    'base_dir'.
+
+    'compress' must be "gzip" (the default), "bzip2", or None.
+
+    'owner' and 'group' can be used to define an owner and a group for the
+    archive that is being built. If not provided, the current owner and group
+    will be used.
+
+    The output tar file will be named 'base_name' +  ".tar", possibly plus
+    the appropriate compression extension (".gz", or ".bz2").
+
+    Returns the output filename.
+    """
+    tar_compression = {'gzip': 'gz', None: ''}
+    compress_ext = {'gzip': '.gz'}
+
+    if _BZ2_SUPPORTED:
+        tar_compression['bzip2'] = 'bz2'
+        compress_ext['bzip2'] = '.bz2'
+
+    # flags for compression program, each element of list will be an argument
+    if compress is not None and compress not in compress_ext:
+        raise ValueError("bad value for 'compress', or compression format not "
+                         "supported : {0}".format(compress))
+
+    archive_name = base_name + '.tar' + compress_ext.get(compress, '')
+    archive_dir = os.path.dirname(archive_name)
+
+    if not os.path.exists(archive_dir):
+        if logger is not None:
+            logger.info("creating %s", archive_dir)
+        if not dry_run:
+            os.makedirs(archive_dir)
+
+    # creating the tarball
+    if logger is not None:
+        logger.info('Creating tar archive')
+
+    uid = _get_uid(owner)
+    gid = _get_gid(group)
+
+    def _set_uid_gid(tarinfo):
+        if gid is not None:
+            tarinfo.gid = gid
+            tarinfo.gname = group
+        if uid is not None:
+            tarinfo.uid = uid
+            tarinfo.uname = owner
+        return tarinfo
+
+    if not dry_run:
+        tar = tarfile.open(archive_name, 'w|%s' % tar_compression[compress])
+        try:
+            tar.add(base_dir, filter=_set_uid_gid)
+        finally:
+            tar.close()
+
+    return archive_name
+
+def _call_external_zip(base_dir, zip_filename, verbose=False, dry_run=False):
+    # XXX see if we want to keep an external call here
+    if verbose:
+        zipoptions = "-r"
+    else:
+        zipoptions = "-rq"
+    from distutils.errors import DistutilsExecError
+    from distutils.spawn import spawn
+    try:
+        spawn(["zip", zipoptions, zip_filename, base_dir], dry_run=dry_run)
+    except DistutilsExecError:
+        # XXX really should distinguish between "couldn't find
+        # external 'zip' command" and "zip failed".
+        raise ExecError("unable to create zip file '%s': "
+            "could neither import the 'zipfile' module nor "
+            "find a standalone zip utility") % zip_filename
+
+def _make_zipfile(base_name, base_dir, verbose=0, dry_run=0, logger=None):
+    """Create a zip file from all the files under 'base_dir'.
+
+    The output zip file will be named 'base_name' + ".zip".  Uses either the
+    "zipfile" Python module (if available) or the InfoZIP "zip" utility
+    (if installed and found on the default search path).  If neither tool is
+    available, raises ExecError.  Returns the name of the output zip
+    file.
+    """
+    zip_filename = base_name + ".zip"
+    archive_dir = os.path.dirname(base_name)
+
+    if not os.path.exists(archive_dir):
+        if logger is not None:
+            logger.info("creating %s", archive_dir)
+        if not dry_run:
+            os.makedirs(archive_dir)
+
+    # If zipfile module is not available, try spawning an external 'zip'
+    # command.
+    try:
+        import zipfile
+    except ImportError:
+        zipfile = None
+
+    if zipfile is None:
+        _call_external_zip(base_dir, zip_filename, verbose, dry_run)
+    else:
+        if logger is not None:
+            logger.info("creating '%s' and adding '%s' to it",
+                        zip_filename, base_dir)
+
+        if not dry_run:
+            zip = zipfile.ZipFile(zip_filename, "w",
+                                  compression=zipfile.ZIP_DEFLATED)
+
+            for dirpath, dirnames, filenames in os.walk(base_dir):
+                for name in filenames:
+                    path = os.path.normpath(os.path.join(dirpath, name))
+                    if os.path.isfile(path):
+                        zip.write(path, path)
+                        if logger is not None:
+                            logger.info("adding '%s'", path)
+            zip.close()
+
+    return zip_filename
+
+_ARCHIVE_FORMATS = {
+    'gztar': (_make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),
+    'bztar': (_make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),
+    'tar':   (_make_tarball, [('compress', None)], "uncompressed tar file"),
+    'zip':   (_make_zipfile, [], "ZIP file"),
+    }
+
+if _BZ2_SUPPORTED:
+    _ARCHIVE_FORMATS['bztar'] = (_make_tarball, [('compress', 'bzip2')],
+                                "bzip2'ed tar-file")
+
+def get_archive_formats():
+    """Returns a list of supported formats for archiving and unarchiving.
+
+    Each element of the returned sequence is a tuple (name, description)
+    """
+    formats = [(name, registry[2]) for name, registry in
+               _ARCHIVE_FORMATS.items()]
+    formats.sort()
+    return formats
+
+def register_archive_format(name, function, extra_args=None, description=''):
+    """Registers an archive format.
+
+    name is the name of the format. function is the callable that will be
+    used to create archives. If provided, extra_args is a sequence of
+    (name, value) tuples that will be passed as arguments to the callable.
+    description can be provided to describe the format, and will be returned
+    by the get_archive_formats() function.
+    """
+    if extra_args is None:
+        extra_args = []
+    if not isinstance(function, collections.Callable):
+        raise TypeError('The %s object is not callable' % function)
+    if not isinstance(extra_args, (tuple, list)):
+        raise TypeError('extra_args needs to be a sequence')
+    for element in extra_args:
+        if not isinstance(element, (tuple, list)) or len(element) !=2:
+            raise TypeError('extra_args elements are : (arg_name, value)')
+
+    _ARCHIVE_FORMATS[name] = (function, extra_args, description)
+
+def unregister_archive_format(name):
+    del _ARCHIVE_FORMATS[name]
+
+def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0,
+                 dry_run=0, owner=None, group=None, logger=None):
+    """Create an archive file (eg. zip or tar).
+
+    'base_name' is the name of the file to create, minus any format-specific
+    extension; 'format' is the archive format: one of "zip", "tar", "bztar"
+    or "gztar".
+
+    'root_dir' is a directory that will be the root directory of the
+    archive; ie. we typically chdir into 'root_dir' before creating the
+    archive.  'base_dir' is the directory where we start archiving from;
+    ie. 'base_dir' will be the common prefix of all files and
+    directories in the archive.  'root_dir' and 'base_dir' both default
+    to the current directory.  Returns the name of the archive file.
+
+    'owner' and 'group' are used when creating a tar archive. By default,
+    uses the current owner and group.
+    """
+    save_cwd = os.getcwd()
+    if root_dir is not None:
+        if logger is not None:
+            logger.debug("changing into '%s'", root_dir)
+        base_name = os.path.abspath(base_name)
+        if not dry_run:
+            os.chdir(root_dir)
+
+    if base_dir is None:
+        base_dir = os.curdir
+
+    kwargs = {'dry_run': dry_run, 'logger': logger}
+
+    try:
+        format_info = _ARCHIVE_FORMATS[format]
+    except KeyError:
+        raise ValueError("unknown archive format '%s'" % format)
+
+    func = format_info[0]
+    for arg, val in format_info[1]:
+        kwargs[arg] = val
+
+    if format != 'zip':
+        kwargs['owner'] = owner
+        kwargs['group'] = group
+
+    try:
+        filename = func(base_name, base_dir, **kwargs)
+    finally:
+        if root_dir is not None:
+            if logger is not None:
+                logger.debug("changing back to '%s'", save_cwd)
+            os.chdir(save_cwd)
+
+    return filename
+
+
+def get_unpack_formats():
+    """Returns a list of supported formats for unpacking.
+
+    Each element of the returned sequence is a tuple
+    (name, extensions, description)
+    """
+    formats = [(name, info[0], info[3]) for name, info in
+               _UNPACK_FORMATS.items()]
+    formats.sort()
+    return formats
+
+def _check_unpack_options(extensions, function, extra_args):
+    """Checks what gets registered as an unpacker."""
+    # first make sure no other unpacker is registered for this extension
+    existing_extensions = {}
+    for name, info in _UNPACK_FORMATS.items():
+        for ext in info[0]:
+            existing_extensions[ext] = name
+
+    for extension in extensions:
+        if extension in existing_extensions:
+            msg = '%s is already registered for "%s"'
+            raise RegistryError(msg % (extension,
+                                       existing_extensions[extension]))
+
+    if not isinstance(function, collections.Callable):
+        raise TypeError('The registered function must be a callable')
+
+
+def register_unpack_format(name, extensions, function, extra_args=None,
+                           description=''):
+    """Registers an unpack format.
+
+    `name` is the name of the format. `extensions` is a list of extensions
+    corresponding to the format.
+
+    `function` is the callable that will be
+    used to unpack archives. The callable will receive archives to unpack.
+    If it's unable to handle an archive, it needs to raise a ReadError
+    exception.
+
+    If provided, `extra_args` is a sequence of
+    (name, value) tuples that will be passed as arguments to the callable.
+    description can be provided to describe the format, and will be returned
+    by the get_unpack_formats() function.
+    """
+    if extra_args is None:
+        extra_args = []
+    _check_unpack_options(extensions, function, extra_args)
+    _UNPACK_FORMATS[name] = extensions, function, extra_args, description
+
+def unregister_unpack_format(name):
+    """Removes the pack format from the registry."""
+    del _UNPACK_FORMATS[name]
+
+def _ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    if not os.path.isdir(dirname):
+        os.makedirs(dirname)
+
+def _unpack_zipfile(filename, extract_dir):
+    """Unpack zip `filename` to `extract_dir`
+    """
+    try:
+        import zipfile
+    except ImportError:
+        raise ReadError('zlib not supported, cannot unpack this archive.')
+
+    if not zipfile.is_zipfile(filename):
+        raise ReadError("%s is not a zip file" % filename)
+
+    zip = zipfile.ZipFile(filename)
+    try:
+        for info in zip.infolist():
+            name = info.filename
+
+            # don't extract absolute paths or ones with .. in them
+            if name.startswith('/') or '..' in name:
+                continue
+
+            target = os.path.join(extract_dir, *name.split('/'))
+            if not target:
+                continue
+
+            _ensure_directory(target)
+            if not name.endswith('/'):
+                # file
+                data = zip.read(info.filename)
+                f = open(target, 'wb')
+                try:
+                    f.write(data)
+                finally:
+                    f.close()
+                    del data
+    finally:
+        zip.close()
+
+def _unpack_tarfile(filename, extract_dir):
+    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
+    """
+    try:
+        tarobj = tarfile.open(filename)
+    except tarfile.TarError:
+        raise ReadError(
+            "%s is not a compressed or uncompressed tar file" % filename)
+    try:
+        tarobj.extractall(extract_dir)
+    finally:
+        tarobj.close()
+
+_UNPACK_FORMATS = {
+    'gztar': (['.tar.gz', '.tgz'], _unpack_tarfile, [], "gzip'ed tar-file"),
+    'tar':   (['.tar'], _unpack_tarfile, [], "uncompressed tar file"),
+    'zip':   (['.zip'], _unpack_zipfile, [], "ZIP file")
+    }
+
+if _BZ2_SUPPORTED:
+    _UNPACK_FORMATS['bztar'] = (['.bz2'], _unpack_tarfile, [],
+                                "bzip2'ed tar-file")
+
+def _find_unpack_format(filename):
+    for name, info in _UNPACK_FORMATS.items():
+        for extension in info[0]:
+            if filename.endswith(extension):
+                return name
+    return None
+
+def unpack_archive(filename, extract_dir=None, format=None):
+    """Unpack an archive.
+
+    `filename` is the name of the archive.
+
+    `extract_dir` is the name of the target directory, where the archive
+    is unpacked. If not provided, the current working directory is used.
+
+    `format` is the archive format: one of "zip", "tar", or "gztar". Or any
+    other registered format. If not provided, unpack_archive will use the
+    filename extension and see if an unpacker was registered for that
+    extension.
+
+    In case none is found, a ValueError is raised.
+    """
+    if extract_dir is None:
+        extract_dir = os.getcwd()
+
+    if format is not None:
+        try:
+            format_info = _UNPACK_FORMATS[format]
+        except KeyError:
+            raise ValueError("Unknown unpack format '{0}'".format(format))
+
+        func = format_info[1]
+        func(filename, extract_dir, **dict(format_info[2]))
+    else:
+        # we need to look at the registered unpackers supported extensions
+        format = _find_unpack_format(filename)
+        if format is None:
+            raise ReadError("Unknown archive format '{0}'".format(filename))
+
+        func = _UNPACK_FORMATS[format][1]
+        kwargs = dict(_UNPACK_FORMATS[format][2])
+        func(filename, extract_dir, **kwargs)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg
new file mode 100644
index 00000000..1746bd01
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg
@@ -0,0 +1,84 @@
+[posix_prefix]
+# Configuration directories.  Some of these come straight out of the
+# configure script.  They are for implementing the other variables, not to
+# be used directly in [resource_locations].
+confdir = /etc
+datadir = /usr/share
+libdir = /usr/lib
+statedir = /var
+# User resource directory
+local = ~/.local/{distribution.name}
+
+stdlib = {base}/lib/python{py_version_short}
+platstdlib = {platbase}/lib/python{py_version_short}
+purelib = {base}/lib/python{py_version_short}/site-packages
+platlib = {platbase}/lib/python{py_version_short}/site-packages
+include = {base}/include/python{py_version_short}{abiflags}
+platinclude = {platbase}/include/python{py_version_short}{abiflags}
+data = {base}
+
+[posix_home]
+stdlib = {base}/lib/python
+platstdlib = {base}/lib/python
+purelib = {base}/lib/python
+platlib = {base}/lib/python
+include = {base}/include/python
+platinclude = {base}/include/python
+scripts = {base}/bin
+data = {base}
+
+[nt]
+stdlib = {base}/Lib
+platstdlib = {base}/Lib
+purelib = {base}/Lib/site-packages
+platlib = {base}/Lib/site-packages
+include = {base}/Include
+platinclude = {base}/Include
+scripts = {base}/Scripts
+data = {base}
+
+[os2]
+stdlib = {base}/Lib
+platstdlib = {base}/Lib
+purelib = {base}/Lib/site-packages
+platlib = {base}/Lib/site-packages
+include = {base}/Include
+platinclude = {base}/Include
+scripts = {base}/Scripts
+data = {base}
+
+[os2_home]
+stdlib = {userbase}/lib/python{py_version_short}
+platstdlib = {userbase}/lib/python{py_version_short}
+purelib = {userbase}/lib/python{py_version_short}/site-packages
+platlib = {userbase}/lib/python{py_version_short}/site-packages
+include = {userbase}/include/python{py_version_short}
+scripts = {userbase}/bin
+data = {userbase}
+
+[nt_user]
+stdlib = {userbase}/Python{py_version_nodot}
+platstdlib = {userbase}/Python{py_version_nodot}
+purelib = {userbase}/Python{py_version_nodot}/site-packages
+platlib = {userbase}/Python{py_version_nodot}/site-packages
+include = {userbase}/Python{py_version_nodot}/Include
+scripts = {userbase}/Scripts
+data = {userbase}
+
+[posix_user]
+stdlib = {userbase}/lib/python{py_version_short}
+platstdlib = {userbase}/lib/python{py_version_short}
+purelib = {userbase}/lib/python{py_version_short}/site-packages
+platlib = {userbase}/lib/python{py_version_short}/site-packages
+include = {userbase}/include/python{py_version_short}
+scripts = {userbase}/bin
+data = {userbase}
+
+[osx_framework_user]
+stdlib = {userbase}/lib/python
+platstdlib = {userbase}/lib/python
+purelib = {userbase}/lib/python/site-packages
+platlib = {userbase}/lib/python/site-packages
+include = {userbase}/include
+scripts = {userbase}/bin
+data = {userbase}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.py
new file mode 100644
index 00000000..1df3aba1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/sysconfig.py
@@ -0,0 +1,788 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Access to Python's configuration information."""
+
+import codecs
+import os
+import re
+import sys
+from os.path import pardir, realpath
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser
+
+
+__all__ = [
+    'get_config_h_filename',
+    'get_config_var',
+    'get_config_vars',
+    'get_makefile_filename',
+    'get_path',
+    'get_path_names',
+    'get_paths',
+    'get_platform',
+    'get_python_version',
+    'get_scheme_names',
+    'parse_config_h',
+]
+
+
+def _safe_realpath(path):
+    try:
+        return realpath(path)
+    except OSError:
+        return path
+
+
+if sys.executable:
+    _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
+else:
+    # sys.executable can be empty if argv[0] has been changed and Python is
+    # unable to retrieve the real program name
+    _PROJECT_BASE = _safe_realpath(os.getcwd())
+
+if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir))
+# PC/VS7.1
+if os.name == "nt" and "\\pc\\v" in _PROJECT_BASE[-10:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
+# PC/AMD64
+if os.name == "nt" and "\\pcbuild\\amd64" in _PROJECT_BASE[-14:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
+
+
+def is_python_build():
+    for fn in ("Setup.dist", "Setup.local"):
+        if os.path.isfile(os.path.join(_PROJECT_BASE, "Modules", fn)):
+            return True
+    return False
+
+_PYTHON_BUILD = is_python_build()
+
+_cfg_read = False
+
+def _ensure_cfg_read():
+    global _cfg_read
+    if not _cfg_read:
+        from ..resources import finder
+        backport_package = __name__.rsplit('.', 1)[0]
+        _finder = finder(backport_package)
+        _cfgfile = _finder.find('sysconfig.cfg')
+        assert _cfgfile, 'sysconfig.cfg exists'
+        with _cfgfile.as_stream() as s:
+            _SCHEMES.readfp(s)
+        if _PYTHON_BUILD:
+            for scheme in ('posix_prefix', 'posix_home'):
+                _SCHEMES.set(scheme, 'include', '{srcdir}/Include')
+                _SCHEMES.set(scheme, 'platinclude', '{projectbase}/.')
+
+        _cfg_read = True
+
+
+_SCHEMES = configparser.RawConfigParser()
+_VAR_REPL = re.compile(r'\{([^{]*?)\}')
+
+def _expand_globals(config):
+    _ensure_cfg_read()
+    if config.has_section('globals'):
+        globals = config.items('globals')
+    else:
+        globals = tuple()
+
+    sections = config.sections()
+    for section in sections:
+        if section == 'globals':
+            continue
+        for option, value in globals:
+            if config.has_option(section, option):
+                continue
+            config.set(section, option, value)
+    config.remove_section('globals')
+
+    # now expanding local variables defined in the cfg file
+    #
+    for section in config.sections():
+        variables = dict(config.items(section))
+
+        def _replacer(matchobj):
+            name = matchobj.group(1)
+            if name in variables:
+                return variables[name]
+            return matchobj.group(0)
+
+        for option, value in config.items(section):
+            config.set(section, option, _VAR_REPL.sub(_replacer, value))
+
+#_expand_globals(_SCHEMES)
+
+ # FIXME don't rely on sys.version here, its format is an implementation detail
+ # of CPython, use sys.version_info or sys.hexversion
+_PY_VERSION = sys.version.split()[0]
+_PY_VERSION_SHORT = sys.version[:3]
+_PY_VERSION_SHORT_NO_DOT = _PY_VERSION[0] + _PY_VERSION[2]
+_PREFIX = os.path.normpath(sys.prefix)
+_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
+_CONFIG_VARS = None
+_USER_BASE = None
+
+
+def _subst_vars(path, local_vars):
+    """In the string `path`, replace tokens like {some.thing} with the
+    corresponding value from the map `local_vars`.
+
+    If there is no corresponding value, leave the token unchanged.
+    """
+    def _replacer(matchobj):
+        name = matchobj.group(1)
+        if name in local_vars:
+            return local_vars[name]
+        elif name in os.environ:
+            return os.environ[name]
+        return matchobj.group(0)
+    return _VAR_REPL.sub(_replacer, path)
+
+
+def _extend_dict(target_dict, other_dict):
+    target_keys = target_dict.keys()
+    for key, value in other_dict.items():
+        if key in target_keys:
+            continue
+        target_dict[key] = value
+
+
+def _expand_vars(scheme, vars):
+    res = {}
+    if vars is None:
+        vars = {}
+    _extend_dict(vars, get_config_vars())
+
+    for key, value in _SCHEMES.items(scheme):
+        if os.name in ('posix', 'nt'):
+            value = os.path.expanduser(value)
+        res[key] = os.path.normpath(_subst_vars(value, vars))
+    return res
+
+
+def format_value(value, vars):
+    def _replacer(matchobj):
+        name = matchobj.group(1)
+        if name in vars:
+            return vars[name]
+        return matchobj.group(0)
+    return _VAR_REPL.sub(_replacer, value)
+
+
+def _get_default_scheme():
+    if os.name == 'posix':
+        # the default scheme for posix is posix_prefix
+        return 'posix_prefix'
+    return os.name
+
+
+def _getuserbase():
+    env_base = os.environ.get("PYTHONUSERBASE", None)
+
+    def joinuser(*args):
+        return os.path.expanduser(os.path.join(*args))
+
+    # what about 'os2emx', 'riscos' ?
+    if os.name == "nt":
+        base = os.environ.get("APPDATA") or "~"
+        if env_base:
+            return env_base
+        else:
+            return joinuser(base, "Python")
+
+    if sys.platform == "darwin":
+        framework = get_config_var("PYTHONFRAMEWORK")
+        if framework:
+            if env_base:
+                return env_base
+            else:
+                return joinuser("~", "Library", framework, "%d.%d" %
+                                sys.version_info[:2])
+
+    if env_base:
+        return env_base
+    else:
+        return joinuser("~", ".local")
+
+
+def _parse_makefile(filename, vars=None):
+    """Parse a Makefile-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    # Regexes needed for parsing Makefile (and similar syntaxes,
+    # like old-style Setup files).
+    _variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
+    _findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
+    _findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
+
+    if vars is None:
+        vars = {}
+    done = {}
+    notdone = {}
+
+    with codecs.open(filename, encoding='utf-8', errors="surrogateescape") as f:
+        lines = f.readlines()
+
+    for line in lines:
+        if line.startswith('#') or line.strip() == '':
+            continue
+        m = _variable_rx.match(line)
+        if m:
+            n, v = m.group(1, 2)
+            v = v.strip()
+            # `$$' is a literal `$' in make
+            tmpv = v.replace('$$', '')
+
+            if "$" in tmpv:
+                notdone[n] = v
+            else:
+                try:
+                    v = int(v)
+                except ValueError:
+                    # insert literal `$'
+                    done[n] = v.replace('$$', '$')
+                else:
+                    done[n] = v
+
+    # do variable interpolation here
+    variables = list(notdone.keys())
+
+    # Variables with a 'PY_' prefix in the makefile. These need to
+    # be made available without that prefix through sysconfig.
+    # Special care is needed to ensure that variable expansion works, even
+    # if the expansion uses the name without a prefix.
+    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
+
+    while len(variables) > 0:
+        for name in tuple(variables):
+            value = notdone[name]
+            m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
+            if m is not None:
+                n = m.group(1)
+                found = True
+                if n in done:
+                    item = str(done[n])
+                elif n in notdone:
+                    # get it on a subsequent round
+                    found = False
+                elif n in os.environ:
+                    # do it like make: fall back to environment
+                    item = os.environ[n]
+
+                elif n in renamed_variables:
+                    if (name.startswith('PY_') and
+                        name[3:] in renamed_variables):
+                        item = ""
+
+                    elif 'PY_' + n in notdone:
+                        found = False
+
+                    else:
+                        item = str(done['PY_' + n])
+
+                else:
+                    done[n] = item = ""
+
+                if found:
+                    after = value[m.end():]
+                    value = value[:m.start()] + item + after
+                    if "$" in after:
+                        notdone[name] = value
+                    else:
+                        try:
+                            value = int(value)
+                        except ValueError:
+                            done[name] = value.strip()
+                        else:
+                            done[name] = value
+                        variables.remove(name)
+
+                        if (name.startswith('PY_') and
+                            name[3:] in renamed_variables):
+
+                            name = name[3:]
+                            if name not in done:
+                                done[name] = value
+
+            else:
+                # bogus variable reference (e.g. "prefix=$/opt/python");
+                # just drop it since we can't deal
+                done[name] = value
+                variables.remove(name)
+
+    # strip spurious spaces
+    for k, v in done.items():
+        if isinstance(v, str):
+            done[k] = v.strip()
+
+    # save the results in the global dictionary
+    vars.update(done)
+    return vars
+
+
+def get_makefile_filename():
+    """Return the path of the Makefile."""
+    if _PYTHON_BUILD:
+        return os.path.join(_PROJECT_BASE, "Makefile")
+    if hasattr(sys, 'abiflags'):
+        config_dir_name = 'config-%s%s' % (_PY_VERSION_SHORT, sys.abiflags)
+    else:
+        config_dir_name = 'config'
+    return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
+
+
+def _init_posix(vars):
+    """Initialize the module as appropriate for POSIX systems."""
+    # load the installed Makefile:
+    makefile = get_makefile_filename()
+    try:
+        _parse_makefile(makefile, vars)
+    except IOError as e:
+        msg = "invalid Python installation: unable to open %s" % makefile
+        if hasattr(e, "strerror"):
+            msg = msg + " (%s)" % e.strerror
+        raise IOError(msg)
+    # load the installed pyconfig.h:
+    config_h = get_config_h_filename()
+    try:
+        with open(config_h) as f:
+            parse_config_h(f, vars)
+    except IOError as e:
+        msg = "invalid Python installation: unable to open %s" % config_h
+        if hasattr(e, "strerror"):
+            msg = msg + " (%s)" % e.strerror
+        raise IOError(msg)
+    # On AIX, there are wrong paths to the linker scripts in the Makefile
+    # -- these paths are relative to the Python source, but when installed
+    # the scripts are in another directory.
+    if _PYTHON_BUILD:
+        vars['LDSHARED'] = vars['BLDSHARED']
+
+
+def _init_non_posix(vars):
+    """Initialize the module as appropriate for NT"""
+    # set basic install directories
+    vars['LIBDEST'] = get_path('stdlib')
+    vars['BINLIBDEST'] = get_path('platstdlib')
+    vars['INCLUDEPY'] = get_path('include')
+    vars['SO'] = '.pyd'
+    vars['EXE'] = '.exe'
+    vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
+    vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
+
+#
+# public APIs
+#
+
+
+def parse_config_h(fp, vars=None):
+    """Parse a config.h-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    if vars is None:
+        vars = {}
+    define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
+    undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
+
+    while True:
+        line = fp.readline()
+        if not line:
+            break
+        m = define_rx.match(line)
+        if m:
+            n, v = m.group(1, 2)
+            try:
+                v = int(v)
+            except ValueError:
+                pass
+            vars[n] = v
+        else:
+            m = undef_rx.match(line)
+            if m:
+                vars[m.group(1)] = 0
+    return vars
+
+
+def get_config_h_filename():
+    """Return the path of pyconfig.h."""
+    if _PYTHON_BUILD:
+        if os.name == "nt":
+            inc_dir = os.path.join(_PROJECT_BASE, "PC")
+        else:
+            inc_dir = _PROJECT_BASE
+    else:
+        inc_dir = get_path('platinclude')
+    return os.path.join(inc_dir, 'pyconfig.h')
+
+
+def get_scheme_names():
+    """Return a tuple containing the schemes names."""
+    return tuple(sorted(_SCHEMES.sections()))
+
+
+def get_path_names():
+    """Return a tuple containing the paths names."""
+    # xxx see if we want a static list
+    return _SCHEMES.options('posix_prefix')
+
+
+def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):
+    """Return a mapping containing an install scheme.
+
+    ``scheme`` is the install scheme name. If not provided, it will
+    return the default scheme for the current platform.
+    """
+    _ensure_cfg_read()
+    if expand:
+        return _expand_vars(scheme, vars)
+    else:
+        return dict(_SCHEMES.items(scheme))
+
+
+def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):
+    """Return a path corresponding to the scheme.
+
+    ``scheme`` is the install scheme name.
+    """
+    return get_paths(scheme, vars, expand)[name]
+
+
+def get_config_vars(*args):
+    """With no arguments, return a dictionary of all configuration
+    variables relevant for the current platform.
+
+    On Unix, this means every variable defined in Python's installed Makefile;
+    On Windows and Mac OS it's a much smaller set.
+
+    With arguments, return a list of values that result from looking up
+    each argument in the configuration variable dictionary.
+    """
+    global _CONFIG_VARS
+    if _CONFIG_VARS is None:
+        _CONFIG_VARS = {}
+        # Normalized versions of prefix and exec_prefix are handy to have;
+        # in fact, these are the standard versions used most places in the
+        # distutils2 module.
+        _CONFIG_VARS['prefix'] = _PREFIX
+        _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
+        _CONFIG_VARS['py_version'] = _PY_VERSION
+        _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
+        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]
+        _CONFIG_VARS['base'] = _PREFIX
+        _CONFIG_VARS['platbase'] = _EXEC_PREFIX
+        _CONFIG_VARS['projectbase'] = _PROJECT_BASE
+        try:
+            _CONFIG_VARS['abiflags'] = sys.abiflags
+        except AttributeError:
+            # sys.abiflags may not be defined on all platforms.
+            _CONFIG_VARS['abiflags'] = ''
+
+        if os.name in ('nt', 'os2'):
+            _init_non_posix(_CONFIG_VARS)
+        if os.name == 'posix':
+            _init_posix(_CONFIG_VARS)
+        # Setting 'userbase' is done below the call to the
+        # init function to enable using 'get_config_var' in
+        # the init-function.
+        if sys.version >= '2.6':
+            _CONFIG_VARS['userbase'] = _getuserbase()
+
+        if 'srcdir' not in _CONFIG_VARS:
+            _CONFIG_VARS['srcdir'] = _PROJECT_BASE
+        else:
+            _CONFIG_VARS['srcdir'] = _safe_realpath(_CONFIG_VARS['srcdir'])
+
+        # Convert srcdir into an absolute path if it appears necessary.
+        # Normally it is relative to the build directory.  However, during
+        # testing, for example, we might be running a non-installed python
+        # from a different directory.
+        if _PYTHON_BUILD and os.name == "posix":
+            base = _PROJECT_BASE
+            try:
+                cwd = os.getcwd()
+            except OSError:
+                cwd = None
+            if (not os.path.isabs(_CONFIG_VARS['srcdir']) and
+                base != cwd):
+                # srcdir is relative and we are not in the same directory
+                # as the executable. Assume executable is in the build
+                # directory and make srcdir absolute.
+                srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
+                _CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
+
+        if sys.platform == 'darwin':
+            kernel_version = os.uname()[2]  # Kernel version (8.4.3)
+            major_version = int(kernel_version.split('.')[0])
+
+            if major_version < 8:
+                # On Mac OS X before 10.4, check if -arch and -isysroot
+                # are in CFLAGS or LDFLAGS and remove them if they are.
+                # This is needed when building extensions on a 10.3 system
+                # using a universal build of python.
+                for key in ('LDFLAGS', 'BASECFLAGS',
+                        # a number of derived variables. These need to be
+                        # patched up as well.
+                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+                    flags = _CONFIG_VARS[key]
+                    flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
+                    flags = re.sub('-isysroot [^ \t]*', ' ', flags)
+                    _CONFIG_VARS[key] = flags
+            else:
+                # Allow the user to override the architecture flags using
+                # an environment variable.
+                # NOTE: This name was introduced by Apple in OSX 10.5 and
+                # is used by several scripting languages distributed with
+                # that OS release.
+                if 'ARCHFLAGS' in os.environ:
+                    arch = os.environ['ARCHFLAGS']
+                    for key in ('LDFLAGS', 'BASECFLAGS',
+                        # a number of derived variables. These need to be
+                        # patched up as well.
+                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+
+                        flags = _CONFIG_VARS[key]
+                        flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
+                        flags = flags + ' ' + arch
+                        _CONFIG_VARS[key] = flags
+
+                # If we're on OSX 10.5 or later and the user tries to
+                # compiles an extension using an SDK that is not present
+                # on the current machine it is better to not use an SDK
+                # than to fail.
+                #
+                # The major usecase for this is users using a Python.org
+                # binary installer  on OSX 10.6: that installer uses
+                # the 10.4u SDK, but that SDK is not installed by default
+                # when you install Xcode.
+                #
+                CFLAGS = _CONFIG_VARS.get('CFLAGS', '')
+                m = re.search(r'-isysroot\s+(\S+)', CFLAGS)
+                if m is not None:
+                    sdk = m.group(1)
+                    if not os.path.exists(sdk):
+                        for key in ('LDFLAGS', 'BASECFLAGS',
+                             # a number of derived variables. These need to be
+                             # patched up as well.
+                            'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+
+                            flags = _CONFIG_VARS[key]
+                            flags = re.sub(r'-isysroot\s+\S+(\s|$)', ' ', flags)
+                            _CONFIG_VARS[key] = flags
+
+    if args:
+        vals = []
+        for name in args:
+            vals.append(_CONFIG_VARS.get(name))
+        return vals
+    else:
+        return _CONFIG_VARS
+
+
+def get_config_var(name):
+    """Return the value of a single variable using the dictionary returned by
+    'get_config_vars()'.
+
+    Equivalent to get_config_vars().get(name)
+    """
+    return get_config_vars().get(name)
+
+
+def get_platform():
+    """Return a string that identifies the current platform.
+
+    This is used mainly to distinguish platform-specific build directories and
+    platform-specific built distributions.  Typically includes the OS name
+    and version and the architecture (as supplied by 'os.uname()'),
+    although the exact information included depends on the OS; eg. for IRIX
+    the architecture isn't particularly important (IRIX only runs on SGI
+    hardware), but for Linux the kernel version isn't particularly
+    important.
+
+    Examples of returned values:
+       linux-i586
+       linux-alpha (?)
+       solaris-2.6-sun4u
+       irix-5.3
+       irix64-6.2
+
+    Windows will return one of:
+       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
+       win-ia64 (64bit Windows on Itanium)
+       win32 (all others - specifically, sys.platform is returned)
+
+    For other non-POSIX platforms, currently just returns 'sys.platform'.
+    """
+    if os.name == 'nt':
+        # sniff sys.version for architecture.
+        prefix = " bit ("
+        i = sys.version.find(prefix)
+        if i == -1:
+            return sys.platform
+        j = sys.version.find(")", i)
+        look = sys.version[i+len(prefix):j].lower()
+        if look == 'amd64':
+            return 'win-amd64'
+        if look == 'itanium':
+            return 'win-ia64'
+        return sys.platform
+
+    if os.name != "posix" or not hasattr(os, 'uname'):
+        # XXX what about the architecture? NT is Intel or Alpha,
+        # Mac OS is M68k or PPC, etc.
+        return sys.platform
+
+    # Try to distinguish various flavours of Unix
+    osname, host, release, version, machine = os.uname()
+
+    # Convert the OS name to lowercase, remove '/' characters
+    # (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
+    osname = osname.lower().replace('/', '')
+    machine = machine.replace(' ', '_')
+    machine = machine.replace('/', '-')
+
+    if osname[:5] == "linux":
+        # At least on Linux/Intel, 'machine' is the processor --
+        # i386, etc.
+        # XXX what about Alpha, SPARC, etc?
+        return  "%s-%s" % (osname, machine)
+    elif osname[:5] == "sunos":
+        if release[0] >= "5":           # SunOS 5 == Solaris 2
+            osname = "solaris"
+            release = "%d.%s" % (int(release[0]) - 3, release[2:])
+        # fall through to standard osname-release-machine representation
+    elif osname[:4] == "irix":              # could be "irix64"!
+        return "%s-%s" % (osname, release)
+    elif osname[:3] == "aix":
+        return "%s-%s.%s" % (osname, version, release)
+    elif osname[:6] == "cygwin":
+        osname = "cygwin"
+        rel_re = re.compile(r'[\d.]+')
+        m = rel_re.match(release)
+        if m:
+            release = m.group()
+    elif osname[:6] == "darwin":
+        #
+        # For our purposes, we'll assume that the system version from
+        # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
+        # to. This makes the compatibility story a bit more sane because the
+        # machine is going to compile and link as if it were
+        # MACOSX_DEPLOYMENT_TARGET.
+        cfgvars = get_config_vars()
+        macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
+
+        if True:
+            # Always calculate the release of the running machine,
+            # needed to determine if we can build fat binaries or not.
+
+            macrelease = macver
+            # Get the system version. Reading this plist is a documented
+            # way to get the system version (see the documentation for
+            # the Gestalt Manager)
+            try:
+                f = open('/System/Library/CoreServices/SystemVersion.plist')
+            except IOError:
+                # We're on a plain darwin box, fall back to the default
+                # behaviour.
+                pass
+            else:
+                try:
+                    m = re.search(r'<key>ProductUserVisibleVersion</key>\s*'
+                                  r'<string>(.*?)</string>', f.read())
+                finally:
+                    f.close()
+                if m is not None:
+                    macrelease = '.'.join(m.group(1).split('.')[:2])
+                # else: fall back to the default behaviour
+
+        if not macver:
+            macver = macrelease
+
+        if macver:
+            release = macver
+            osname = "macosx"
+
+            if ((macrelease + '.') >= '10.4.' and
+                '-arch' in get_config_vars().get('CFLAGS', '').strip()):
+                # The universal build will build fat binaries, but not on
+                # systems before 10.4
+                #
+                # Try to detect 4-way universal builds, those have machine-type
+                # 'universal' instead of 'fat'.
+
+                machine = 'fat'
+                cflags = get_config_vars().get('CFLAGS')
+
+                archs = re.findall(r'-arch\s+(\S+)', cflags)
+                archs = tuple(sorted(set(archs)))
+
+                if len(archs) == 1:
+                    machine = archs[0]
+                elif archs == ('i386', 'ppc'):
+                    machine = 'fat'
+                elif archs == ('i386', 'x86_64'):
+                    machine = 'intel'
+                elif archs == ('i386', 'ppc', 'x86_64'):
+                    machine = 'fat3'
+                elif archs == ('ppc64', 'x86_64'):
+                    machine = 'fat64'
+                elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
+                    machine = 'universal'
+                else:
+                    raise ValueError(
+                       "Don't know machine value for archs=%r" % (archs,))
+
+            elif machine == 'i386':
+                # On OSX the machine type returned by uname is always the
+                # 32-bit variant, even if the executable architecture is
+                # the 64-bit variant
+                if sys.maxsize >= 2**32:
+                    machine = 'x86_64'
+
+            elif machine in ('PowerPC', 'Power_Macintosh'):
+                # Pick a sane name for the PPC architecture.
+                # See 'i386' case
+                if sys.maxsize >= 2**32:
+                    machine = 'ppc64'
+                else:
+                    machine = 'ppc'
+
+    return "%s-%s-%s" % (osname, release, machine)
+
+
+def get_python_version():
+    return _PY_VERSION_SHORT
+
+
+def _print_dict(title, data):
+    for index, (key, value) in enumerate(sorted(data.items())):
+        if index == 0:
+            print('%s: ' % (title))
+        print('\t%s = "%s"' % (key, value))
+
+
+def _main():
+    """Display all information sysconfig detains."""
+    print('Platform: "%s"' % get_platform())
+    print('Python version: "%s"' % get_python_version())
+    print('Current installation scheme: "%s"' % _get_default_scheme())
+    print()
+    _print_dict('Paths', get_paths())
+    print()
+    _print_dict('Variables', get_config_vars())
+
+
+if __name__ == '__main__':
+    _main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/tarfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/tarfile.py
new file mode 100644
index 00000000..d66d8566
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/_backport/tarfile.py
@@ -0,0 +1,2607 @@
+#-------------------------------------------------------------------
+# tarfile.py
+#-------------------------------------------------------------------
+# Copyright (C) 2002 Lars Gustaebel <lars@gustaebel.de>
+# All rights reserved.
+#
+# Permission  is  hereby granted,  free  of charge,  to  any person
+# obtaining a  copy of  this software  and associated documentation
+# files  (the  "Software"),  to   deal  in  the  Software   without
+# restriction,  including  without limitation  the  rights to  use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies  of  the  Software,  and to  permit  persons  to  whom the
+# Software  is  furnished  to  do  so,  subject  to  the  following
+# conditions:
+#
+# The above copyright  notice and this  permission notice shall  be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS  IS", WITHOUT WARRANTY OF ANY  KIND,
+# EXPRESS OR IMPLIED, INCLUDING  BUT NOT LIMITED TO  THE WARRANTIES
+# OF  MERCHANTABILITY,  FITNESS   FOR  A  PARTICULAR   PURPOSE  AND
+# NONINFRINGEMENT.  IN  NO  EVENT SHALL  THE  AUTHORS  OR COPYRIGHT
+# HOLDERS  BE LIABLE  FOR ANY  CLAIM, DAMAGES  OR OTHER  LIABILITY,
+# WHETHER  IN AN  ACTION OF  CONTRACT, TORT  OR OTHERWISE,  ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+from __future__ import print_function
+
+"""Read from and write to tar format archives.
+"""
+
+__version__ = "$Revision$"
+
+version     = "0.9.0"
+__author__  = "Lars Gust\u00e4bel (lars@gustaebel.de)"
+__date__    = "$Date: 2011-02-25 17:42:01 +0200 (Fri, 25 Feb 2011) $"
+__cvsid__   = "$Id: tarfile.py 88586 2011-02-25 15:42:01Z marc-andre.lemburg $"
+__credits__ = "Gustavo Niemeyer, Niels Gust\u00e4bel, Richard Townsend."
+
+#---------
+# Imports
+#---------
+import sys
+import os
+import stat
+import errno
+import time
+import struct
+import copy
+import re
+
+try:
+    import grp, pwd
+except ImportError:
+    grp = pwd = None
+
+# os.symlink on Windows prior to 6.0 raises NotImplementedError
+symlink_exception = (AttributeError, NotImplementedError)
+try:
+    # WindowsError (1314) will be raised if the caller does not hold the
+    # SeCreateSymbolicLinkPrivilege privilege
+    symlink_exception += (WindowsError,)
+except NameError:
+    pass
+
+# from tarfile import *
+__all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError"]
+
+if sys.version_info[0] < 3:
+    import __builtin__ as builtins
+else:
+    import builtins
+
+_open = builtins.open   # Since 'open' is TarFile.open
+
+#---------------------------------------------------------
+# tar constants
+#---------------------------------------------------------
+NUL = b"\0"                     # the null character
+BLOCKSIZE = 512                 # length of processing blocks
+RECORDSIZE = BLOCKSIZE * 20     # length of records
+GNU_MAGIC = b"ustar  \0"        # magic gnu tar string
+POSIX_MAGIC = b"ustar\x0000"    # magic posix tar string
+
+LENGTH_NAME = 100               # maximum length of a filename
+LENGTH_LINK = 100               # maximum length of a linkname
+LENGTH_PREFIX = 155             # maximum length of the prefix field
+
+REGTYPE = b"0"                  # regular file
+AREGTYPE = b"\0"                # regular file
+LNKTYPE = b"1"                  # link (inside tarfile)
+SYMTYPE = b"2"                  # symbolic link
+CHRTYPE = b"3"                  # character special device
+BLKTYPE = b"4"                  # block special device
+DIRTYPE = b"5"                  # directory
+FIFOTYPE = b"6"                 # fifo special device
+CONTTYPE = b"7"                 # contiguous file
+
+GNUTYPE_LONGNAME = b"L"         # GNU tar longname
+GNUTYPE_LONGLINK = b"K"         # GNU tar longlink
+GNUTYPE_SPARSE = b"S"           # GNU tar sparse file
+
+XHDTYPE = b"x"                  # POSIX.1-2001 extended header
+XGLTYPE = b"g"                  # POSIX.1-2001 global header
+SOLARIS_XHDTYPE = b"X"          # Solaris extended header
+
+USTAR_FORMAT = 0                # POSIX.1-1988 (ustar) format
+GNU_FORMAT = 1                  # GNU tar format
+PAX_FORMAT = 2                  # POSIX.1-2001 (pax) format
+DEFAULT_FORMAT = GNU_FORMAT
+
+#---------------------------------------------------------
+# tarfile constants
+#---------------------------------------------------------
+# File types that tarfile supports:
+SUPPORTED_TYPES = (REGTYPE, AREGTYPE, LNKTYPE,
+                   SYMTYPE, DIRTYPE, FIFOTYPE,
+                   CONTTYPE, CHRTYPE, BLKTYPE,
+                   GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+                   GNUTYPE_SPARSE)
+
+# File types that will be treated as a regular file.
+REGULAR_TYPES = (REGTYPE, AREGTYPE,
+                 CONTTYPE, GNUTYPE_SPARSE)
+
+# File types that are part of the GNU tar format.
+GNU_TYPES = (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+             GNUTYPE_SPARSE)
+
+# Fields from a pax header that override a TarInfo attribute.
+PAX_FIELDS = ("path", "linkpath", "size", "mtime",
+              "uid", "gid", "uname", "gname")
+
+# Fields from a pax header that are affected by hdrcharset.
+PAX_NAME_FIELDS = set(("path", "linkpath", "uname", "gname"))
+
+# Fields in a pax header that are numbers, all other fields
+# are treated as strings.
+PAX_NUMBER_FIELDS = {
+    "atime": float,
+    "ctime": float,
+    "mtime": float,
+    "uid": int,
+    "gid": int,
+    "size": int
+}
+
+#---------------------------------------------------------
+# Bits used in the mode field, values in octal.
+#---------------------------------------------------------
+S_IFLNK = 0o120000        # symbolic link
+S_IFREG = 0o100000        # regular file
+S_IFBLK = 0o060000        # block device
+S_IFDIR = 0o040000        # directory
+S_IFCHR = 0o020000        # character device
+S_IFIFO = 0o010000        # fifo
+
+TSUID   = 0o4000          # set UID on execution
+TSGID   = 0o2000          # set GID on execution
+TSVTX   = 0o1000          # reserved
+
+TUREAD  = 0o400           # read by owner
+TUWRITE = 0o200           # write by owner
+TUEXEC  = 0o100           # execute/search by owner
+TGREAD  = 0o040           # read by group
+TGWRITE = 0o020           # write by group
+TGEXEC  = 0o010           # execute/search by group
+TOREAD  = 0o004           # read by other
+TOWRITE = 0o002           # write by other
+TOEXEC  = 0o001           # execute/search by other
+
+#---------------------------------------------------------
+# initialization
+#---------------------------------------------------------
+if os.name in ("nt", "ce"):
+    ENCODING = "utf-8"
+else:
+    ENCODING = sys.getfilesystemencoding()
+
+#---------------------------------------------------------
+# Some useful functions
+#---------------------------------------------------------
+
+def stn(s, length, encoding, errors):
+    """Convert a string to a null-terminated bytes object.
+    """
+    s = s.encode(encoding, errors)
+    return s[:length] + (length - len(s)) * NUL
+
+def nts(s, encoding, errors):
+    """Convert a null-terminated bytes object to a string.
+    """
+    p = s.find(b"\0")
+    if p != -1:
+        s = s[:p]
+    return s.decode(encoding, errors)
+
+def nti(s):
+    """Convert a number field to a python number.
+    """
+    # There are two possible encodings for a number field, see
+    # itn() below.
+    if s[0] != chr(0o200):
+        try:
+            n = int(nts(s, "ascii", "strict") or "0", 8)
+        except ValueError:
+            raise InvalidHeaderError("invalid header")
+    else:
+        n = 0
+        for i in range(len(s) - 1):
+            n <<= 8
+            n += ord(s[i + 1])
+    return n
+
+def itn(n, digits=8, format=DEFAULT_FORMAT):
+    """Convert a python number to a number field.
+    """
+    # POSIX 1003.1-1988 requires numbers to be encoded as a string of
+    # octal digits followed by a null-byte, this allows values up to
+    # (8**(digits-1))-1. GNU tar allows storing numbers greater than
+    # that if necessary. A leading 0o200 byte indicates this particular
+    # encoding, the following digits-1 bytes are a big-endian
+    # representation. This allows values up to (256**(digits-1))-1.
+    if 0 <= n < 8 ** (digits - 1):
+        s = ("%0*o" % (digits - 1, n)).encode("ascii") + NUL
+    else:
+        if format != GNU_FORMAT or n >= 256 ** (digits - 1):
+            raise ValueError("overflow in number field")
+
+        if n < 0:
+            # XXX We mimic GNU tar's behaviour with negative numbers,
+            # this could raise OverflowError.
+            n = struct.unpack("L", struct.pack("l", n))[0]
+
+        s = bytearray()
+        for i in range(digits - 1):
+            s.insert(0, n & 0o377)
+            n >>= 8
+        s.insert(0, 0o200)
+    return s
+
+def calc_chksums(buf):
+    """Calculate the checksum for a member's header by summing up all
+       characters except for the chksum field which is treated as if
+       it was filled with spaces. According to the GNU tar sources,
+       some tars (Sun and NeXT) calculate chksum with signed char,
+       which will be different if there are chars in the buffer with
+       the high bit set. So we calculate two checksums, unsigned and
+       signed.
+    """
+    unsigned_chksum = 256 + sum(struct.unpack("148B", buf[:148]) + struct.unpack("356B", buf[156:512]))
+    signed_chksum = 256 + sum(struct.unpack("148b", buf[:148]) + struct.unpack("356b", buf[156:512]))
+    return unsigned_chksum, signed_chksum
+
+def copyfileobj(src, dst, length=None):
+    """Copy length bytes from fileobj src to fileobj dst.
+       If length is None, copy the entire content.
+    """
+    if length == 0:
+        return
+    if length is None:
+        while True:
+            buf = src.read(16*1024)
+            if not buf:
+                break
+            dst.write(buf)
+        return
+
+    BUFSIZE = 16 * 1024
+    blocks, remainder = divmod(length, BUFSIZE)
+    for b in range(blocks):
+        buf = src.read(BUFSIZE)
+        if len(buf) < BUFSIZE:
+            raise IOError("end of file reached")
+        dst.write(buf)
+
+    if remainder != 0:
+        buf = src.read(remainder)
+        if len(buf) < remainder:
+            raise IOError("end of file reached")
+        dst.write(buf)
+    return
+
+filemode_table = (
+    ((S_IFLNK,      "l"),
+     (S_IFREG,      "-"),
+     (S_IFBLK,      "b"),
+     (S_IFDIR,      "d"),
+     (S_IFCHR,      "c"),
+     (S_IFIFO,      "p")),
+
+    ((TUREAD,       "r"),),
+    ((TUWRITE,      "w"),),
+    ((TUEXEC|TSUID, "s"),
+     (TSUID,        "S"),
+     (TUEXEC,       "x")),
+
+    ((TGREAD,       "r"),),
+    ((TGWRITE,      "w"),),
+    ((TGEXEC|TSGID, "s"),
+     (TSGID,        "S"),
+     (TGEXEC,       "x")),
+
+    ((TOREAD,       "r"),),
+    ((TOWRITE,      "w"),),
+    ((TOEXEC|TSVTX, "t"),
+     (TSVTX,        "T"),
+     (TOEXEC,       "x"))
+)
+
+def filemode(mode):
+    """Convert a file's mode to a string of the form
+       -rwxrwxrwx.
+       Used by TarFile.list()
+    """
+    perm = []
+    for table in filemode_table:
+        for bit, char in table:
+            if mode & bit == bit:
+                perm.append(char)
+                break
+        else:
+            perm.append("-")
+    return "".join(perm)
+
+class TarError(Exception):
+    """Base exception."""
+    pass
+class ExtractError(TarError):
+    """General exception for extract errors."""
+    pass
+class ReadError(TarError):
+    """Exception for unreadable tar archives."""
+    pass
+class CompressionError(TarError):
+    """Exception for unavailable compression methods."""
+    pass
+class StreamError(TarError):
+    """Exception for unsupported operations on stream-like TarFiles."""
+    pass
+class HeaderError(TarError):
+    """Base exception for header errors."""
+    pass
+class EmptyHeaderError(HeaderError):
+    """Exception for empty headers."""
+    pass
+class TruncatedHeaderError(HeaderError):
+    """Exception for truncated headers."""
+    pass
+class EOFHeaderError(HeaderError):
+    """Exception for end of file headers."""
+    pass
+class InvalidHeaderError(HeaderError):
+    """Exception for invalid headers."""
+    pass
+class SubsequentHeaderError(HeaderError):
+    """Exception for missing and invalid extended headers."""
+    pass
+
+#---------------------------
+# internal stream interface
+#---------------------------
+class _LowLevelFile(object):
+    """Low-level file object. Supports reading and writing.
+       It is used instead of a regular file object for streaming
+       access.
+    """
+
+    def __init__(self, name, mode):
+        mode = {
+            "r": os.O_RDONLY,
+            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
+        }[mode]
+        if hasattr(os, "O_BINARY"):
+            mode |= os.O_BINARY
+        self.fd = os.open(name, mode, 0o666)
+
+    def close(self):
+        os.close(self.fd)
+
+    def read(self, size):
+        return os.read(self.fd, size)
+
+    def write(self, s):
+        os.write(self.fd, s)
+
+class _Stream(object):
+    """Class that serves as an adapter between TarFile and
+       a stream-like object.  The stream-like object only
+       needs to have a read() or write() method and is accessed
+       blockwise.  Use of gzip or bzip2 compression is possible.
+       A stream-like object could be for example: sys.stdin,
+       sys.stdout, a socket, a tape device etc.
+
+       _Stream is intended to be used only internally.
+    """
+
+    def __init__(self, name, mode, comptype, fileobj, bufsize):
+        """Construct a _Stream object.
+        """
+        self._extfileobj = True
+        if fileobj is None:
+            fileobj = _LowLevelFile(name, mode)
+            self._extfileobj = False
+
+        if comptype == '*':
+            # Enable transparent compression detection for the
+            # stream interface
+            fileobj = _StreamProxy(fileobj)
+            comptype = fileobj.getcomptype()
+
+        self.name     = name or ""
+        self.mode     = mode
+        self.comptype = comptype
+        self.fileobj  = fileobj
+        self.bufsize  = bufsize
+        self.buf      = b""
+        self.pos      = 0
+        self.closed   = False
+
+        try:
+            if comptype == "gz":
+                try:
+                    import zlib
+                except ImportError:
+                    raise CompressionError("zlib module is not available")
+                self.zlib = zlib
+                self.crc = zlib.crc32(b"")
+                if mode == "r":
+                    self._init_read_gz()
+                else:
+                    self._init_write_gz()
+
+            if comptype == "bz2":
+                try:
+                    import bz2
+                except ImportError:
+                    raise CompressionError("bz2 module is not available")
+                if mode == "r":
+                    self.dbuf = b""
+                    self.cmp = bz2.BZ2Decompressor()
+                else:
+                    self.cmp = bz2.BZ2Compressor()
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    def __del__(self):
+        if hasattr(self, "closed") and not self.closed:
+            self.close()
+
+    def _init_write_gz(self):
+        """Initialize for writing with gzip compression.
+        """
+        self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,
+                                            -self.zlib.MAX_WBITS,
+                                            self.zlib.DEF_MEM_LEVEL,
+                                            0)
+        timestamp = struct.pack("<L", int(time.time()))
+        self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
+        if self.name.endswith(".gz"):
+            self.name = self.name[:-3]
+        # RFC1952 says we must use ISO-8859-1 for the FNAME field.
+        self.__write(self.name.encode("iso-8859-1", "replace") + NUL)
+
+    def write(self, s):
+        """Write string s to the stream.
+        """
+        if self.comptype == "gz":
+            self.crc = self.zlib.crc32(s, self.crc)
+        self.pos += len(s)
+        if self.comptype != "tar":
+            s = self.cmp.compress(s)
+        self.__write(s)
+
+    def __write(self, s):
+        """Write string s to the stream if a whole new block
+           is ready to be written.
+        """
+        self.buf += s
+        while len(self.buf) > self.bufsize:
+            self.fileobj.write(self.buf[:self.bufsize])
+            self.buf = self.buf[self.bufsize:]
+
+    def close(self):
+        """Close the _Stream object. No operation should be
+           done on it afterwards.
+        """
+        if self.closed:
+            return
+
+        if self.mode == "w" and self.comptype != "tar":
+            self.buf += self.cmp.flush()
+
+        if self.mode == "w" and self.buf:
+            self.fileobj.write(self.buf)
+            self.buf = b""
+            if self.comptype == "gz":
+                # The native zlib crc is an unsigned 32-bit integer, but
+                # the Python wrapper implicitly casts that to a signed C
+                # long.  So, on a 32-bit box self.crc may "look negative",
+                # while the same crc on a 64-bit box may "look positive".
+                # To avoid irksome warnings from the `struct` module, force
+                # it to look positive on all boxes.
+                self.fileobj.write(struct.pack("<L", self.crc & 0xffffffff))
+                self.fileobj.write(struct.pack("<L", self.pos & 0xffffFFFF))
+
+        if not self._extfileobj:
+            self.fileobj.close()
+
+        self.closed = True
+
+    def _init_read_gz(self):
+        """Initialize for reading a gzip compressed fileobj.
+        """
+        self.cmp = self.zlib.decompressobj(-self.zlib.MAX_WBITS)
+        self.dbuf = b""
+
+        # taken from gzip.GzipFile with some alterations
+        if self.__read(2) != b"\037\213":
+            raise ReadError("not a gzip file")
+        if self.__read(1) != b"\010":
+            raise CompressionError("unsupported compression method")
+
+        flag = ord(self.__read(1))
+        self.__read(6)
+
+        if flag & 4:
+            xlen = ord(self.__read(1)) + 256 * ord(self.__read(1))
+            self.read(xlen)
+        if flag & 8:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 16:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 2:
+            self.__read(2)
+
+    def tell(self):
+        """Return the stream's file pointer position.
+        """
+        return self.pos
+
+    def seek(self, pos=0):
+        """Set the stream's file pointer to pos. Negative seeking
+           is forbidden.
+        """
+        if pos - self.pos >= 0:
+            blocks, remainder = divmod(pos - self.pos, self.bufsize)
+            for i in range(blocks):
+                self.read(self.bufsize)
+            self.read(remainder)
+        else:
+            raise StreamError("seeking backwards is not allowed")
+        return self.pos
+
+    def read(self, size=None):
+        """Return the next size number of bytes from the stream.
+           If size is not defined, return all bytes of the stream
+           up to EOF.
+        """
+        if size is None:
+            t = []
+            while True:
+                buf = self._read(self.bufsize)
+                if not buf:
+                    break
+                t.append(buf)
+            buf = "".join(t)
+        else:
+            buf = self._read(size)
+        self.pos += len(buf)
+        return buf
+
+    def _read(self, size):
+        """Return size bytes from the stream.
+        """
+        if self.comptype == "tar":
+            return self.__read(size)
+
+        c = len(self.dbuf)
+        while c < size:
+            buf = self.__read(self.bufsize)
+            if not buf:
+                break
+            try:
+                buf = self.cmp.decompress(buf)
+            except IOError:
+                raise ReadError("invalid compressed data")
+            self.dbuf += buf
+            c += len(buf)
+        buf = self.dbuf[:size]
+        self.dbuf = self.dbuf[size:]
+        return buf
+
+    def __read(self, size):
+        """Return size bytes from stream. If internal buffer is empty,
+           read another block from the stream.
+        """
+        c = len(self.buf)
+        while c < size:
+            buf = self.fileobj.read(self.bufsize)
+            if not buf:
+                break
+            self.buf += buf
+            c += len(buf)
+        buf = self.buf[:size]
+        self.buf = self.buf[size:]
+        return buf
+# class _Stream
+
+class _StreamProxy(object):
+    """Small proxy class that enables transparent compression
+       detection for the Stream interface (mode 'r|*').
+    """
+
+    def __init__(self, fileobj):
+        self.fileobj = fileobj
+        self.buf = self.fileobj.read(BLOCKSIZE)
+
+    def read(self, size):
+        self.read = self.fileobj.read
+        return self.buf
+
+    def getcomptype(self):
+        if self.buf.startswith(b"\037\213\010"):
+            return "gz"
+        if self.buf.startswith(b"BZh91"):
+            return "bz2"
+        return "tar"
+
+    def close(self):
+        self.fileobj.close()
+# class StreamProxy
+
+class _BZ2Proxy(object):
+    """Small proxy class that enables external file object
+       support for "r:bz2" and "w:bz2" modes. This is actually
+       a workaround for a limitation in bz2 module's BZ2File
+       class which (unlike gzip.GzipFile) has no support for
+       a file object argument.
+    """
+
+    blocksize = 16 * 1024
+
+    def __init__(self, fileobj, mode):
+        self.fileobj = fileobj
+        self.mode = mode
+        self.name = getattr(self.fileobj, "name", None)
+        self.init()
+
+    def init(self):
+        import bz2
+        self.pos = 0
+        if self.mode == "r":
+            self.bz2obj = bz2.BZ2Decompressor()
+            self.fileobj.seek(0)
+            self.buf = b""
+        else:
+            self.bz2obj = bz2.BZ2Compressor()
+
+    def read(self, size):
+        x = len(self.buf)
+        while x < size:
+            raw = self.fileobj.read(self.blocksize)
+            if not raw:
+                break
+            data = self.bz2obj.decompress(raw)
+            self.buf += data
+            x += len(data)
+
+        buf = self.buf[:size]
+        self.buf = self.buf[size:]
+        self.pos += len(buf)
+        return buf
+
+    def seek(self, pos):
+        if pos < self.pos:
+            self.init()
+        self.read(pos - self.pos)
+
+    def tell(self):
+        return self.pos
+
+    def write(self, data):
+        self.pos += len(data)
+        raw = self.bz2obj.compress(data)
+        self.fileobj.write(raw)
+
+    def close(self):
+        if self.mode == "w":
+            raw = self.bz2obj.flush()
+            self.fileobj.write(raw)
+# class _BZ2Proxy
+
+#------------------------
+# Extraction file object
+#------------------------
+class _FileInFile(object):
+    """A thin wrapper around an existing file object that
+       provides a part of its data as an individual file
+       object.
+    """
+
+    def __init__(self, fileobj, offset, size, blockinfo=None):
+        self.fileobj = fileobj
+        self.offset = offset
+        self.size = size
+        self.position = 0
+
+        if blockinfo is None:
+            blockinfo = [(0, size)]
+
+        # Construct a map with data and zero blocks.
+        self.map_index = 0
+        self.map = []
+        lastpos = 0
+        realpos = self.offset
+        for offset, size in blockinfo:
+            if offset > lastpos:
+                self.map.append((False, lastpos, offset, None))
+            self.map.append((True, offset, offset + size, realpos))
+            realpos += size
+            lastpos = offset + size
+        if lastpos < self.size:
+            self.map.append((False, lastpos, self.size, None))
+
+    def seekable(self):
+        if not hasattr(self.fileobj, "seekable"):
+            # XXX gzip.GzipFile and bz2.BZ2File
+            return True
+        return self.fileobj.seekable()
+
+    def tell(self):
+        """Return the current file position.
+        """
+        return self.position
+
+    def seek(self, position):
+        """Seek to a position in the file.
+        """
+        self.position = position
+
+    def read(self, size=None):
+        """Read data from the file.
+        """
+        if size is None:
+            size = self.size - self.position
+        else:
+            size = min(size, self.size - self.position)
+
+        buf = b""
+        while size > 0:
+            while True:
+                data, start, stop, offset = self.map[self.map_index]
+                if start <= self.position < stop:
+                    break
+                else:
+                    self.map_index += 1
+                    if self.map_index == len(self.map):
+                        self.map_index = 0
+            length = min(size, stop - self.position)
+            if data:
+                self.fileobj.seek(offset + (self.position - start))
+                buf += self.fileobj.read(length)
+            else:
+                buf += NUL * length
+            size -= length
+            self.position += length
+        return buf
+#class _FileInFile
+
+
+class ExFileObject(object):
+    """File-like object for reading an archive member.
+       Is returned by TarFile.extractfile().
+    """
+    blocksize = 1024
+
+    def __init__(self, tarfile, tarinfo):
+        self.fileobj = _FileInFile(tarfile.fileobj,
+                                   tarinfo.offset_data,
+                                   tarinfo.size,
+                                   tarinfo.sparse)
+        self.name = tarinfo.name
+        self.mode = "r"
+        self.closed = False
+        self.size = tarinfo.size
+
+        self.position = 0
+        self.buffer = b""
+
+    def readable(self):
+        return True
+
+    def writable(self):
+        return False
+
+    def seekable(self):
+        return self.fileobj.seekable()
+
+    def read(self, size=None):
+        """Read at most size bytes from the file. If size is not
+           present or None, read all data until EOF is reached.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        buf = b""
+        if self.buffer:
+            if size is None:
+                buf = self.buffer
+                self.buffer = b""
+            else:
+                buf = self.buffer[:size]
+                self.buffer = self.buffer[size:]
+
+        if size is None:
+            buf += self.fileobj.read()
+        else:
+            buf += self.fileobj.read(size - len(buf))
+
+        self.position += len(buf)
+        return buf
+
+    # XXX TextIOWrapper uses the read1() method.
+    read1 = read
+
+    def readline(self, size=-1):
+        """Read one entire line from the file. If size is present
+           and non-negative, return a string with at most that
+           size, which may be an incomplete line.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        pos = self.buffer.find(b"\n") + 1
+        if pos == 0:
+            # no newline found.
+            while True:
+                buf = self.fileobj.read(self.blocksize)
+                self.buffer += buf
+                if not buf or b"\n" in buf:
+                    pos = self.buffer.find(b"\n") + 1
+                    if pos == 0:
+                        # no newline found.
+                        pos = len(self.buffer)
+                    break
+
+        if size != -1:
+            pos = min(size, pos)
+
+        buf = self.buffer[:pos]
+        self.buffer = self.buffer[pos:]
+        self.position += len(buf)
+        return buf
+
+    def readlines(self):
+        """Return a list with all remaining lines.
+        """
+        result = []
+        while True:
+            line = self.readline()
+            if not line: break
+            result.append(line)
+        return result
+
+    def tell(self):
+        """Return the current file position.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        return self.position
+
+    def seek(self, pos, whence=os.SEEK_SET):
+        """Seek to a position in the file.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        if whence == os.SEEK_SET:
+            self.position = min(max(pos, 0), self.size)
+        elif whence == os.SEEK_CUR:
+            if pos < 0:
+                self.position = max(self.position + pos, 0)
+            else:
+                self.position = min(self.position + pos, self.size)
+        elif whence == os.SEEK_END:
+            self.position = max(min(self.size + pos, self.size), 0)
+        else:
+            raise ValueError("Invalid argument")
+
+        self.buffer = b""
+        self.fileobj.seek(self.position)
+
+    def close(self):
+        """Close the file object.
+        """
+        self.closed = True
+
+    def __iter__(self):
+        """Get an iterator over the file's lines.
+        """
+        while True:
+            line = self.readline()
+            if not line:
+                break
+            yield line
+#class ExFileObject
+
+#------------------
+# Exported Classes
+#------------------
+class TarInfo(object):
+    """Informational class which holds the details about an
+       archive member given by a tar header block.
+       TarInfo objects are returned by TarFile.getmember(),
+       TarFile.getmembers() and TarFile.gettarinfo() and are
+       usually created internally.
+    """
+
+    __slots__ = ("name", "mode", "uid", "gid", "size", "mtime",
+                 "chksum", "type", "linkname", "uname", "gname",
+                 "devmajor", "devminor",
+                 "offset", "offset_data", "pax_headers", "sparse",
+                 "tarfile", "_sparse_structs", "_link_target")
+
+    def __init__(self, name=""):
+        """Construct a TarInfo object. name is the optional name
+           of the member.
+        """
+        self.name = name        # member name
+        self.mode = 0o644       # file permissions
+        self.uid = 0            # user id
+        self.gid = 0            # group id
+        self.size = 0           # file size
+        self.mtime = 0          # modification time
+        self.chksum = 0         # header checksum
+        self.type = REGTYPE     # member type
+        self.linkname = ""      # link name
+        self.uname = ""         # user name
+        self.gname = ""         # group name
+        self.devmajor = 0       # device major number
+        self.devminor = 0       # device minor number
+
+        self.offset = 0         # the tar header starts here
+        self.offset_data = 0    # the file's data starts here
+
+        self.sparse = None      # sparse member information
+        self.pax_headers = {}   # pax header information
+
+    # In pax headers the "name" and "linkname" field are called
+    # "path" and "linkpath".
+    def _getpath(self):
+        return self.name
+    def _setpath(self, name):
+        self.name = name
+    path = property(_getpath, _setpath)
+
+    def _getlinkpath(self):
+        return self.linkname
+    def _setlinkpath(self, linkname):
+        self.linkname = linkname
+    linkpath = property(_getlinkpath, _setlinkpath)
+
+    def __repr__(self):
+        return "<%s %r at %#x>" % (self.__class__.__name__,self.name,id(self))
+
+    def get_info(self):
+        """Return the TarInfo's attributes as a dictionary.
+        """
+        info = {
+            "name":     self.name,
+            "mode":     self.mode & 0o7777,
+            "uid":      self.uid,
+            "gid":      self.gid,
+            "size":     self.size,
+            "mtime":    self.mtime,
+            "chksum":   self.chksum,
+            "type":     self.type,
+            "linkname": self.linkname,
+            "uname":    self.uname,
+            "gname":    self.gname,
+            "devmajor": self.devmajor,
+            "devminor": self.devminor
+        }
+
+        if info["type"] == DIRTYPE and not info["name"].endswith("/"):
+            info["name"] += "/"
+
+        return info
+
+    def tobuf(self, format=DEFAULT_FORMAT, encoding=ENCODING, errors="surrogateescape"):
+        """Return a tar header as a string of 512 byte blocks.
+        """
+        info = self.get_info()
+
+        if format == USTAR_FORMAT:
+            return self.create_ustar_header(info, encoding, errors)
+        elif format == GNU_FORMAT:
+            return self.create_gnu_header(info, encoding, errors)
+        elif format == PAX_FORMAT:
+            return self.create_pax_header(info, encoding)
+        else:
+            raise ValueError("invalid format")
+
+    def create_ustar_header(self, info, encoding, errors):
+        """Return the object as a ustar header block.
+        """
+        info["magic"] = POSIX_MAGIC
+
+        if len(info["linkname"]) > LENGTH_LINK:
+            raise ValueError("linkname is too long")
+
+        if len(info["name"]) > LENGTH_NAME:
+            info["prefix"], info["name"] = self._posix_split_name(info["name"])
+
+        return self._create_header(info, USTAR_FORMAT, encoding, errors)
+
+    def create_gnu_header(self, info, encoding, errors):
+        """Return the object as a GNU header block sequence.
+        """
+        info["magic"] = GNU_MAGIC
+
+        buf = b""
+        if len(info["linkname"]) > LENGTH_LINK:
+            buf += self._create_gnu_long_header(info["linkname"], GNUTYPE_LONGLINK, encoding, errors)
+
+        if len(info["name"]) > LENGTH_NAME:
+            buf += self._create_gnu_long_header(info["name"], GNUTYPE_LONGNAME, encoding, errors)
+
+        return buf + self._create_header(info, GNU_FORMAT, encoding, errors)
+
+    def create_pax_header(self, info, encoding):
+        """Return the object as a ustar header block. If it cannot be
+           represented this way, prepend a pax extended header sequence
+           with supplement information.
+        """
+        info["magic"] = POSIX_MAGIC
+        pax_headers = self.pax_headers.copy()
+
+        # Test string fields for values that exceed the field length or cannot
+        # be represented in ASCII encoding.
+        for name, hname, length in (
+                ("name", "path", LENGTH_NAME), ("linkname", "linkpath", LENGTH_LINK),
+                ("uname", "uname", 32), ("gname", "gname", 32)):
+
+            if hname in pax_headers:
+                # The pax header has priority.
+                continue
+
+            # Try to encode the string as ASCII.
+            try:
+                info[name].encode("ascii", "strict")
+            except UnicodeEncodeError:
+                pax_headers[hname] = info[name]
+                continue
+
+            if len(info[name]) > length:
+                pax_headers[hname] = info[name]
+
+        # Test number fields for values that exceed the field limit or values
+        # that like to be stored as float.
+        for name, digits in (("uid", 8), ("gid", 8), ("size", 12), ("mtime", 12)):
+            if name in pax_headers:
+                # The pax header has priority. Avoid overflow.
+                info[name] = 0
+                continue
+
+            val = info[name]
+            if not 0 <= val < 8 ** (digits - 1) or isinstance(val, float):
+                pax_headers[name] = str(val)
+                info[name] = 0
+
+        # Create a pax extended header if necessary.
+        if pax_headers:
+            buf = self._create_pax_generic_header(pax_headers, XHDTYPE, encoding)
+        else:
+            buf = b""
+
+        return buf + self._create_header(info, USTAR_FORMAT, "ascii", "replace")
+
+    @classmethod
+    def create_pax_global_header(cls, pax_headers):
+        """Return the object as a pax global header block sequence.
+        """
+        return cls._create_pax_generic_header(pax_headers, XGLTYPE, "utf8")
+
+    def _posix_split_name(self, name):
+        """Split a name longer than 100 chars into a prefix
+           and a name part.
+        """
+        prefix = name[:LENGTH_PREFIX + 1]
+        while prefix and prefix[-1] != "/":
+            prefix = prefix[:-1]
+
+        name = name[len(prefix):]
+        prefix = prefix[:-1]
+
+        if not prefix or len(name) > LENGTH_NAME:
+            raise ValueError("name is too long")
+        return prefix, name
+
+    @staticmethod
+    def _create_header(info, format, encoding, errors):
+        """Return a header block. info is a dictionary with file
+           information, format must be one of the *_FORMAT constants.
+        """
+        parts = [
+            stn(info.get("name", ""), 100, encoding, errors),
+            itn(info.get("mode", 0) & 0o7777, 8, format),
+            itn(info.get("uid", 0), 8, format),
+            itn(info.get("gid", 0), 8, format),
+            itn(info.get("size", 0), 12, format),
+            itn(info.get("mtime", 0), 12, format),
+            b"        ", # checksum field
+            info.get("type", REGTYPE),
+            stn(info.get("linkname", ""), 100, encoding, errors),
+            info.get("magic", POSIX_MAGIC),
+            stn(info.get("uname", ""), 32, encoding, errors),
+            stn(info.get("gname", ""), 32, encoding, errors),
+            itn(info.get("devmajor", 0), 8, format),
+            itn(info.get("devminor", 0), 8, format),
+            stn(info.get("prefix", ""), 155, encoding, errors)
+        ]
+
+        buf = struct.pack("%ds" % BLOCKSIZE, b"".join(parts))
+        chksum = calc_chksums(buf[-BLOCKSIZE:])[0]
+        buf = buf[:-364] + ("%06o\0" % chksum).encode("ascii") + buf[-357:]
+        return buf
+
+    @staticmethod
+    def _create_payload(payload):
+        """Return the string payload filled with zero bytes
+           up to the next 512 byte border.
+        """
+        blocks, remainder = divmod(len(payload), BLOCKSIZE)
+        if remainder > 0:
+            payload += (BLOCKSIZE - remainder) * NUL
+        return payload
+
+    @classmethod
+    def _create_gnu_long_header(cls, name, type, encoding, errors):
+        """Return a GNUTYPE_LONGNAME or GNUTYPE_LONGLINK sequence
+           for name.
+        """
+        name = name.encode(encoding, errors) + NUL
+
+        info = {}
+        info["name"] = "././@LongLink"
+        info["type"] = type
+        info["size"] = len(name)
+        info["magic"] = GNU_MAGIC
+
+        # create extended header + name blocks.
+        return cls._create_header(info, USTAR_FORMAT, encoding, errors) + \
+                cls._create_payload(name)
+
+    @classmethod
+    def _create_pax_generic_header(cls, pax_headers, type, encoding):
+        """Return a POSIX.1-2008 extended or global header sequence
+           that contains a list of keyword, value pairs. The values
+           must be strings.
+        """
+        # Check if one of the fields contains surrogate characters and thereby
+        # forces hdrcharset=BINARY, see _proc_pax() for more information.
+        binary = False
+        for keyword, value in pax_headers.items():
+            try:
+                value.encode("utf8", "strict")
+            except UnicodeEncodeError:
+                binary = True
+                break
+
+        records = b""
+        if binary:
+            # Put the hdrcharset field at the beginning of the header.
+            records += b"21 hdrcharset=BINARY\n"
+
+        for keyword, value in pax_headers.items():
+            keyword = keyword.encode("utf8")
+            if binary:
+                # Try to restore the original byte representation of `value'.
+                # Needless to say, that the encoding must match the string.
+                value = value.encode(encoding, "surrogateescape")
+            else:
+                value = value.encode("utf8")
+
+            l = len(keyword) + len(value) + 3   # ' ' + '=' + '\n'
+            n = p = 0
+            while True:
+                n = l + len(str(p))
+                if n == p:
+                    break
+                p = n
+            records += bytes(str(p), "ascii") + b" " + keyword + b"=" + value + b"\n"
+
+        # We use a hardcoded "././@PaxHeader" name like star does
+        # instead of the one that POSIX recommends.
+        info = {}
+        info["name"] = "././@PaxHeader"
+        info["type"] = type
+        info["size"] = len(records)
+        info["magic"] = POSIX_MAGIC
+
+        # Create pax header + record blocks.
+        return cls._create_header(info, USTAR_FORMAT, "ascii", "replace") + \
+                cls._create_payload(records)
+
+    @classmethod
+    def frombuf(cls, buf, encoding, errors):
+        """Construct a TarInfo object from a 512 byte bytes object.
+        """
+        if len(buf) == 0:
+            raise EmptyHeaderError("empty header")
+        if len(buf) != BLOCKSIZE:
+            raise TruncatedHeaderError("truncated header")
+        if buf.count(NUL) == BLOCKSIZE:
+            raise EOFHeaderError("end of file header")
+
+        chksum = nti(buf[148:156])
+        if chksum not in calc_chksums(buf):
+            raise InvalidHeaderError("bad checksum")
+
+        obj = cls()
+        obj.name = nts(buf[0:100], encoding, errors)
+        obj.mode = nti(buf[100:108])
+        obj.uid = nti(buf[108:116])
+        obj.gid = nti(buf[116:124])
+        obj.size = nti(buf[124:136])
+        obj.mtime = nti(buf[136:148])
+        obj.chksum = chksum
+        obj.type = buf[156:157]
+        obj.linkname = nts(buf[157:257], encoding, errors)
+        obj.uname = nts(buf[265:297], encoding, errors)
+        obj.gname = nts(buf[297:329], encoding, errors)
+        obj.devmajor = nti(buf[329:337])
+        obj.devminor = nti(buf[337:345])
+        prefix = nts(buf[345:500], encoding, errors)
+
+        # Old V7 tar format represents a directory as a regular
+        # file with a trailing slash.
+        if obj.type == AREGTYPE and obj.name.endswith("/"):
+            obj.type = DIRTYPE
+
+        # The old GNU sparse format occupies some of the unused
+        # space in the buffer for up to 4 sparse structures.
+        # Save the them for later processing in _proc_sparse().
+        if obj.type == GNUTYPE_SPARSE:
+            pos = 386
+            structs = []
+            for i in range(4):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[482])
+            origsize = nti(buf[483:495])
+            obj._sparse_structs = (structs, isextended, origsize)
+
+        # Remove redundant slashes from directories.
+        if obj.isdir():
+            obj.name = obj.name.rstrip("/")
+
+        # Reconstruct a ustar longname.
+        if prefix and obj.type not in GNU_TYPES:
+            obj.name = prefix + "/" + obj.name
+        return obj
+
+    @classmethod
+    def fromtarfile(cls, tarfile):
+        """Return the next TarInfo object from TarFile object
+           tarfile.
+        """
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
+        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
+        return obj._proc_member(tarfile)
+
+    #--------------------------------------------------------------------------
+    # The following are methods that are called depending on the type of a
+    # member. The entry point is _proc_member() which can be overridden in a
+    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
+    # implement the following
+    # operations:
+    # 1. Set self.offset_data to the position where the data blocks begin,
+    #    if there is data that follows.
+    # 2. Set tarfile.offset to the position where the next member's header will
+    #    begin.
+    # 3. Return self or another valid TarInfo object.
+    def _proc_member(self, tarfile):
+        """Choose the right processing method depending on
+           the type and call it.
+        """
+        if self.type in (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK):
+            return self._proc_gnulong(tarfile)
+        elif self.type == GNUTYPE_SPARSE:
+            return self._proc_sparse(tarfile)
+        elif self.type in (XHDTYPE, XGLTYPE, SOLARIS_XHDTYPE):
+            return self._proc_pax(tarfile)
+        else:
+            return self._proc_builtin(tarfile)
+
+    def _proc_builtin(self, tarfile):
+        """Process a builtin type or an unknown type which
+           will be treated as a regular file.
+        """
+        self.offset_data = tarfile.fileobj.tell()
+        offset = self.offset_data
+        if self.isreg() or self.type not in SUPPORTED_TYPES:
+            # Skip the following data blocks.
+            offset += self._block(self.size)
+        tarfile.offset = offset
+
+        # Patch the TarInfo object with saved global
+        # header information.
+        self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
+
+        return self
+
+    def _proc_gnulong(self, tarfile):
+        """Process the blocks that hold a GNU longname
+           or longlink member.
+        """
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # Fetch the next header and process it.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError:
+            raise SubsequentHeaderError("missing or bad subsequent header")
+
+        # Patch the TarInfo object from the next header with
+        # the longname information.
+        next.offset = self.offset
+        if self.type == GNUTYPE_LONGNAME:
+            next.name = nts(buf, tarfile.encoding, tarfile.errors)
+        elif self.type == GNUTYPE_LONGLINK:
+            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)
+
+        return next
+
+    def _proc_sparse(self, tarfile):
+        """Process a GNU sparse header plus extra headers.
+        """
+        # We already collected some sparse structures in frombuf().
+        structs, isextended, origsize = self._sparse_structs
+        del self._sparse_structs
+
+        # Collect sparse structures from extended header blocks.
+        while isextended:
+            buf = tarfile.fileobj.read(BLOCKSIZE)
+            pos = 0
+            for i in range(21):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                if offset and numbytes:
+                    structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[504])
+        self.sparse = structs
+
+        self.offset_data = tarfile.fileobj.tell()
+        tarfile.offset = self.offset_data + self._block(self.size)
+        self.size = origsize
+        return self
+
+    def _proc_pax(self, tarfile):
+        """Process an extended or global header as described in
+           POSIX.1-2008.
+        """
+        # Read the header information.
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # A pax header stores supplemental information for either
+        # the following file (extended) or all following files
+        # (global).
+        if self.type == XGLTYPE:
+            pax_headers = tarfile.pax_headers
+        else:
+            pax_headers = tarfile.pax_headers.copy()
+
+        # Check if the pax header contains a hdrcharset field. This tells us
+        # the encoding of the path, linkpath, uname and gname fields. Normally,
+        # these fields are UTF-8 encoded but since POSIX.1-2008 tar
+        # implementations are allowed to store them as raw binary strings if
+        # the translation to UTF-8 fails.
+        match = re.search(br"\d+ hdrcharset=([^\n]+)\n", buf)
+        if match is not None:
+            pax_headers["hdrcharset"] = match.group(1).decode("utf8")
+
+        # For the time being, we don't care about anything other than "BINARY".
+        # The only other value that is currently allowed by the standard is
+        # "ISO-IR 10646 2000 UTF-8" in other words UTF-8.
+        hdrcharset = pax_headers.get("hdrcharset")
+        if hdrcharset == "BINARY":
+            encoding = tarfile.encoding
+        else:
+            encoding = "utf8"
+
+        # Parse pax header information. A record looks like that:
+        # "%d %s=%s\n" % (length, keyword, value). length is the size
+        # of the complete record including the length field itself and
+        # the newline. keyword and value are both UTF-8 encoded strings.
+        regex = re.compile(br"(\d+) ([^=]+)=")
+        pos = 0
+        while True:
+            match = regex.match(buf, pos)
+            if not match:
+                break
+
+            length, keyword = match.groups()
+            length = int(length)
+            value = buf[match.end(2) + 1:match.start(1) + length - 1]
+
+            # Normally, we could just use "utf8" as the encoding and "strict"
+            # as the error handler, but we better not take the risk. For
+            # example, GNU tar <= 1.23 is known to store filenames it cannot
+            # translate to UTF-8 as raw strings (unfortunately without a
+            # hdrcharset=BINARY header).
+            # We first try the strict standard encoding, and if that fails we
+            # fall back on the user's encoding and error handler.
+            keyword = self._decode_pax_field(keyword, "utf8", "utf8",
+                    tarfile.errors)
+            if keyword in PAX_NAME_FIELDS:
+                value = self._decode_pax_field(value, encoding, tarfile.encoding,
+                        tarfile.errors)
+            else:
+                value = self._decode_pax_field(value, "utf8", "utf8",
+                        tarfile.errors)
+
+            pax_headers[keyword] = value
+            pos += length
+
+        # Fetch the next header.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError:
+            raise SubsequentHeaderError("missing or bad subsequent header")
+
+        # Process GNU sparse information.
+        if "GNU.sparse.map" in pax_headers:
+            # GNU extended sparse format version 0.1.
+            self._proc_gnusparse_01(next, pax_headers)
+
+        elif "GNU.sparse.size" in pax_headers:
+            # GNU extended sparse format version 0.0.
+            self._proc_gnusparse_00(next, pax_headers, buf)
+
+        elif pax_headers.get("GNU.sparse.major") == "1" and pax_headers.get("GNU.sparse.minor") == "0":
+            # GNU extended sparse format version 1.0.
+            self._proc_gnusparse_10(next, pax_headers, tarfile)
+
+        if self.type in (XHDTYPE, SOLARIS_XHDTYPE):
+            # Patch the TarInfo object with the extended header info.
+            next._apply_pax_info(pax_headers, tarfile.encoding, tarfile.errors)
+            next.offset = self.offset
+
+            if "size" in pax_headers:
+                # If the extended header replaces the size field,
+                # we need to recalculate the offset where the next
+                # header starts.
+                offset = next.offset_data
+                if next.isreg() or next.type not in SUPPORTED_TYPES:
+                    offset += next._block(next.size)
+                tarfile.offset = offset
+
+        return next
+
+    def _proc_gnusparse_00(self, next, pax_headers, buf):
+        """Process a GNU tar extended sparse header, version 0.0.
+        """
+        offsets = []
+        for match in re.finditer(br"\d+ GNU.sparse.offset=(\d+)\n", buf):
+            offsets.append(int(match.group(1)))
+        numbytes = []
+        for match in re.finditer(br"\d+ GNU.sparse.numbytes=(\d+)\n", buf):
+            numbytes.append(int(match.group(1)))
+        next.sparse = list(zip(offsets, numbytes))
+
+    def _proc_gnusparse_01(self, next, pax_headers):
+        """Process a GNU tar extended sparse header, version 0.1.
+        """
+        sparse = [int(x) for x in pax_headers["GNU.sparse.map"].split(",")]
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _proc_gnusparse_10(self, next, pax_headers, tarfile):
+        """Process a GNU tar extended sparse header, version 1.0.
+        """
+        fields = None
+        sparse = []
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        fields, buf = buf.split(b"\n", 1)
+        fields = int(fields)
+        while len(sparse) < fields * 2:
+            if b"\n" not in buf:
+                buf += tarfile.fileobj.read(BLOCKSIZE)
+            number, buf = buf.split(b"\n", 1)
+            sparse.append(int(number))
+        next.offset_data = tarfile.fileobj.tell()
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _apply_pax_info(self, pax_headers, encoding, errors):
+        """Replace fields with supplemental information from a previous
+           pax extended or global header.
+        """
+        for keyword, value in pax_headers.items():
+            if keyword == "GNU.sparse.name":
+                setattr(self, "path", value)
+            elif keyword == "GNU.sparse.size":
+                setattr(self, "size", int(value))
+            elif keyword == "GNU.sparse.realsize":
+                setattr(self, "size", int(value))
+            elif keyword in PAX_FIELDS:
+                if keyword in PAX_NUMBER_FIELDS:
+                    try:
+                        value = PAX_NUMBER_FIELDS[keyword](value)
+                    except ValueError:
+                        value = 0
+                if keyword == "path":
+                    value = value.rstrip("/")
+                setattr(self, keyword, value)
+
+        self.pax_headers = pax_headers.copy()
+
+    def _decode_pax_field(self, value, encoding, fallback_encoding, fallback_errors):
+        """Decode a single field from a pax record.
+        """
+        try:
+            return value.decode(encoding, "strict")
+        except UnicodeDecodeError:
+            return value.decode(fallback_encoding, fallback_errors)
+
+    def _block(self, count):
+        """Round up a byte count by BLOCKSIZE and return it,
+           e.g. _block(834) => 1024.
+        """
+        blocks, remainder = divmod(count, BLOCKSIZE)
+        if remainder:
+            blocks += 1
+        return blocks * BLOCKSIZE
+
+    def isreg(self):
+        return self.type in REGULAR_TYPES
+    def isfile(self):
+        return self.isreg()
+    def isdir(self):
+        return self.type == DIRTYPE
+    def issym(self):
+        return self.type == SYMTYPE
+    def islnk(self):
+        return self.type == LNKTYPE
+    def ischr(self):
+        return self.type == CHRTYPE
+    def isblk(self):
+        return self.type == BLKTYPE
+    def isfifo(self):
+        return self.type == FIFOTYPE
+    def issparse(self):
+        return self.sparse is not None
+    def isdev(self):
+        return self.type in (CHRTYPE, BLKTYPE, FIFOTYPE)
+# class TarInfo
+
+class TarFile(object):
+    """The TarFile Class provides an interface to tar archives.
+    """
+
+    debug = 0                   # May be set from 0 (no msgs) to 3 (all msgs)
+
+    dereference = False         # If true, add content of linked file to the
+                                # tar file, else the link.
+
+    ignore_zeros = False        # If true, skips empty or invalid blocks and
+                                # continues processing.
+
+    errorlevel = 1              # If 0, fatal errors only appear in debug
+                                # messages (if debug >= 0). If > 0, errors
+                                # are passed to the caller as exceptions.
+
+    format = DEFAULT_FORMAT     # The format to use when creating an archive.
+
+    encoding = ENCODING         # Encoding for 8-bit character strings.
+
+    errors = None               # Error handler for unicode conversion.
+
+    tarinfo = TarInfo           # The default TarInfo class to use.
+
+    fileobject = ExFileObject   # The default ExFileObject class to use.
+
+    def __init__(self, name=None, mode="r", fileobj=None, format=None,
+            tarinfo=None, dereference=None, ignore_zeros=None, encoding=None,
+            errors="surrogateescape", pax_headers=None, debug=None, errorlevel=None):
+        """Open an (uncompressed) tar archive `name'. `mode' is either 'r' to
+           read from an existing archive, 'a' to append data to an existing
+           file or 'w' to create a new file overwriting an existing one. `mode'
+           defaults to 'r'.
+           If `fileobj' is given, it is used for reading or writing data. If it
+           can be determined, `mode' is overridden by `fileobj's mode.
+           `fileobj' is not closed, when TarFile is closed.
+        """
+        if len(mode) > 1 or mode not in "raw":
+            raise ValueError("mode must be 'r', 'a' or 'w'")
+        self.mode = mode
+        self._mode = {"r": "rb", "a": "r+b", "w": "wb"}[mode]
+
+        if not fileobj:
+            if self.mode == "a" and not os.path.exists(name):
+                # Create nonexistent files in append mode.
+                self.mode = "w"
+                self._mode = "wb"
+            fileobj = bltn_open(name, self._mode)
+            self._extfileobj = False
+        else:
+            if name is None and hasattr(fileobj, "name"):
+                name = fileobj.name
+            if hasattr(fileobj, "mode"):
+                self._mode = fileobj.mode
+            self._extfileobj = True
+        self.name = os.path.abspath(name) if name else None
+        self.fileobj = fileobj
+
+        # Init attributes.
+        if format is not None:
+            self.format = format
+        if tarinfo is not None:
+            self.tarinfo = tarinfo
+        if dereference is not None:
+            self.dereference = dereference
+        if ignore_zeros is not None:
+            self.ignore_zeros = ignore_zeros
+        if encoding is not None:
+            self.encoding = encoding
+        self.errors = errors
+
+        if pax_headers is not None and self.format == PAX_FORMAT:
+            self.pax_headers = pax_headers
+        else:
+            self.pax_headers = {}
+
+        if debug is not None:
+            self.debug = debug
+        if errorlevel is not None:
+            self.errorlevel = errorlevel
+
+        # Init datastructures.
+        self.closed = False
+        self.members = []       # list of members as TarInfo objects
+        self._loaded = False    # flag if all members have been read
+        self.offset = self.fileobj.tell()
+                                # current position in the archive file
+        self.inodes = {}        # dictionary caching the inodes of
+                                # archive members already added
+
+        try:
+            if self.mode == "r":
+                self.firstmember = None
+                self.firstmember = self.next()
+
+            if self.mode == "a":
+                # Move to the end of the archive,
+                # before the first empty block.
+                while True:
+                    self.fileobj.seek(self.offset)
+                    try:
+                        tarinfo = self.tarinfo.fromtarfile(self)
+                        self.members.append(tarinfo)
+                    except EOFHeaderError:
+                        self.fileobj.seek(self.offset)
+                        break
+                    except HeaderError as e:
+                        raise ReadError(str(e))
+
+            if self.mode in "aw":
+                self._loaded = True
+
+                if self.pax_headers:
+                    buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
+                    self.fileobj.write(buf)
+                    self.offset += len(buf)
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    #--------------------------------------------------------------------------
+    # Below are the classmethods which act as alternate constructors to the
+    # TarFile class. The open() method is the only one that is needed for
+    # public use; it is the "super"-constructor and is able to select an
+    # adequate "sub"-constructor for a particular compression using the mapping
+    # from OPEN_METH.
+    #
+    # This concept allows one to subclass TarFile without losing the comfort of
+    # the super-constructor. A sub-constructor is registered and made available
+    # by adding it to the mapping in OPEN_METH.
+
+    @classmethod
+    def open(cls, name=None, mode="r", fileobj=None, bufsize=RECORDSIZE, **kwargs):
+        """Open a tar archive for reading, writing or appending. Return
+           an appropriate TarFile class.
+
+           mode:
+           'r' or 'r:*' open for reading with transparent compression
+           'r:'         open for reading exclusively uncompressed
+           'r:gz'       open for reading with gzip compression
+           'r:bz2'      open for reading with bzip2 compression
+           'a' or 'a:'  open for appending, creating the file if necessary
+           'w' or 'w:'  open for writing without compression
+           'w:gz'       open for writing with gzip compression
+           'w:bz2'      open for writing with bzip2 compression
+
+           'r|*'        open a stream of tar blocks with transparent compression
+           'r|'         open an uncompressed stream of tar blocks for reading
+           'r|gz'       open a gzip compressed stream of tar blocks
+           'r|bz2'      open a bzip2 compressed stream of tar blocks
+           'w|'         open an uncompressed stream for writing
+           'w|gz'       open a gzip compressed stream for writing
+           'w|bz2'      open a bzip2 compressed stream for writing
+        """
+
+        if not name and not fileobj:
+            raise ValueError("nothing to open")
+
+        if mode in ("r", "r:*"):
+            # Find out which *open() is appropriate for opening the file.
+            for comptype in cls.OPEN_METH:
+                func = getattr(cls, cls.OPEN_METH[comptype])
+                if fileobj is not None:
+                    saved_pos = fileobj.tell()
+                try:
+                    return func(name, "r", fileobj, **kwargs)
+                except (ReadError, CompressionError) as e:
+                    if fileobj is not None:
+                        fileobj.seek(saved_pos)
+                    continue
+            raise ReadError("file could not be opened successfully")
+
+        elif ":" in mode:
+            filemode, comptype = mode.split(":", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            # Select the *open() function according to
+            # given compression.
+            if comptype in cls.OPEN_METH:
+                func = getattr(cls, cls.OPEN_METH[comptype])
+            else:
+                raise CompressionError("unknown compression type %r" % comptype)
+            return func(name, filemode, fileobj, **kwargs)
+
+        elif "|" in mode:
+            filemode, comptype = mode.split("|", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            if filemode not in "rw":
+                raise ValueError("mode must be 'r' or 'w'")
+
+            stream = _Stream(name, filemode, comptype, fileobj, bufsize)
+            try:
+                t = cls(name, filemode, stream, **kwargs)
+            except:
+                stream.close()
+                raise
+            t._extfileobj = False
+            return t
+
+        elif mode in "aw":
+            return cls.taropen(name, mode, fileobj, **kwargs)
+
+        raise ValueError("undiscernible mode")
+
+    @classmethod
+    def taropen(cls, name, mode="r", fileobj=None, **kwargs):
+        """Open uncompressed tar archive name for reading or writing.
+        """
+        if len(mode) > 1 or mode not in "raw":
+            raise ValueError("mode must be 'r', 'a' or 'w'")
+        return cls(name, mode, fileobj, **kwargs)
+
+    @classmethod
+    def gzopen(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open gzip compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if len(mode) > 1 or mode not in "rw":
+            raise ValueError("mode must be 'r' or 'w'")
+
+        try:
+            import gzip
+            gzip.GzipFile
+        except (ImportError, AttributeError):
+            raise CompressionError("gzip module is not available")
+
+        extfileobj = fileobj is not None
+        try:
+            fileobj = gzip.GzipFile(name, mode + "b", compresslevel, fileobj)
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except IOError:
+            if not extfileobj and fileobj is not None:
+                fileobj.close()
+            if fileobj is None:
+                raise
+            raise ReadError("not a gzip file")
+        except:
+            if not extfileobj and fileobj is not None:
+                fileobj.close()
+            raise
+        t._extfileobj = extfileobj
+        return t
+
+    @classmethod
+    def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open bzip2 compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if len(mode) > 1 or mode not in "rw":
+            raise ValueError("mode must be 'r' or 'w'.")
+
+        try:
+            import bz2
+        except ImportError:
+            raise CompressionError("bz2 module is not available")
+
+        if fileobj is not None:
+            fileobj = _BZ2Proxy(fileobj, mode)
+        else:
+            fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)
+
+        try:
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except (IOError, EOFError):
+            fileobj.close()
+            raise ReadError("not a bzip2 file")
+        t._extfileobj = False
+        return t
+
+    # All *open() methods are registered here.
+    OPEN_METH = {
+        "tar": "taropen",   # uncompressed tar
+        "gz":  "gzopen",    # gzip compressed tar
+        "bz2": "bz2open"    # bzip2 compressed tar
+    }
+
+    #--------------------------------------------------------------------------
+    # The public methods which TarFile provides:
+
+    def close(self):
+        """Close the TarFile. In write-mode, two finishing zero blocks are
+           appended to the archive.
+        """
+        if self.closed:
+            return
+
+        if self.mode in "aw":
+            self.fileobj.write(NUL * (BLOCKSIZE * 2))
+            self.offset += (BLOCKSIZE * 2)
+            # fill up the end with zero-blocks
+            # (like option -b20 for tar does)
+            blocks, remainder = divmod(self.offset, RECORDSIZE)
+            if remainder > 0:
+                self.fileobj.write(NUL * (RECORDSIZE - remainder))
+
+        if not self._extfileobj:
+            self.fileobj.close()
+        self.closed = True
+
+    def getmember(self, name):
+        """Return a TarInfo object for member `name'. If `name' can not be
+           found in the archive, KeyError is raised. If a member occurs more
+           than once in the archive, its last occurrence is assumed to be the
+           most up-to-date version.
+        """
+        tarinfo = self._getmember(name)
+        if tarinfo is None:
+            raise KeyError("filename %r not found" % name)
+        return tarinfo
+
+    def getmembers(self):
+        """Return the members of the archive as a list of TarInfo objects. The
+           list has the same order as the members in the archive.
+        """
+        self._check()
+        if not self._loaded:    # if we want to obtain a list of
+            self._load()        # all members, we first have to
+                                # scan the whole archive.
+        return self.members
+
+    def getnames(self):
+        """Return the members of the archive as a list of their names. It has
+           the same order as the list returned by getmembers().
+        """
+        return [tarinfo.name for tarinfo in self.getmembers()]
+
+    def gettarinfo(self, name=None, arcname=None, fileobj=None):
+        """Create a TarInfo object for either the file `name' or the file
+           object `fileobj' (using os.fstat on its file descriptor). You can
+           modify some of the TarInfo's attributes before you add it using
+           addfile(). If given, `arcname' specifies an alternative name for the
+           file in the archive.
+        """
+        self._check("aw")
+
+        # When fileobj is given, replace name by
+        # fileobj's real name.
+        if fileobj is not None:
+            name = fileobj.name
+
+        # Building the name of the member in the archive.
+        # Backward slashes are converted to forward slashes,
+        # Absolute paths are turned to relative paths.
+        if arcname is None:
+            arcname = name
+        drv, arcname = os.path.splitdrive(arcname)
+        arcname = arcname.replace(os.sep, "/")
+        arcname = arcname.lstrip("/")
+
+        # Now, fill the TarInfo object with
+        # information specific for the file.
+        tarinfo = self.tarinfo()
+        tarinfo.tarfile = self
+
+        # Use os.stat or os.lstat, depending on platform
+        # and if symlinks shall be resolved.
+        if fileobj is None:
+            if hasattr(os, "lstat") and not self.dereference:
+                statres = os.lstat(name)
+            else:
+                statres = os.stat(name)
+        else:
+            statres = os.fstat(fileobj.fileno())
+        linkname = ""
+
+        stmd = statres.st_mode
+        if stat.S_ISREG(stmd):
+            inode = (statres.st_ino, statres.st_dev)
+            if not self.dereference and statres.st_nlink > 1 and \
+                    inode in self.inodes and arcname != self.inodes[inode]:
+                # Is it a hardlink to an already
+                # archived file?
+                type = LNKTYPE
+                linkname = self.inodes[inode]
+            else:
+                # The inode is added only if its valid.
+                # For win32 it is always 0.
+                type = REGTYPE
+                if inode[0]:
+                    self.inodes[inode] = arcname
+        elif stat.S_ISDIR(stmd):
+            type = DIRTYPE
+        elif stat.S_ISFIFO(stmd):
+            type = FIFOTYPE
+        elif stat.S_ISLNK(stmd):
+            type = SYMTYPE
+            linkname = os.readlink(name)
+        elif stat.S_ISCHR(stmd):
+            type = CHRTYPE
+        elif stat.S_ISBLK(stmd):
+            type = BLKTYPE
+        else:
+            return None
+
+        # Fill the TarInfo object with all
+        # information we can get.
+        tarinfo.name = arcname
+        tarinfo.mode = stmd
+        tarinfo.uid = statres.st_uid
+        tarinfo.gid = statres.st_gid
+        if type == REGTYPE:
+            tarinfo.size = statres.st_size
+        else:
+            tarinfo.size = 0
+        tarinfo.mtime = statres.st_mtime
+        tarinfo.type = type
+        tarinfo.linkname = linkname
+        if pwd:
+            try:
+                tarinfo.uname = pwd.getpwuid(tarinfo.uid)[0]
+            except KeyError:
+                pass
+        if grp:
+            try:
+                tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
+            except KeyError:
+                pass
+
+        if type in (CHRTYPE, BLKTYPE):
+            if hasattr(os, "major") and hasattr(os, "minor"):
+                tarinfo.devmajor = os.major(statres.st_rdev)
+                tarinfo.devminor = os.minor(statres.st_rdev)
+        return tarinfo
+
+    def list(self, verbose=True):
+        """Print a table of contents to sys.stdout. If `verbose' is False, only
+           the names of the members are printed. If it is True, an `ls -l'-like
+           output is produced.
+        """
+        self._check()
+
+        for tarinfo in self:
+            if verbose:
+                print(filemode(tarinfo.mode), end=' ')
+                print("%s/%s" % (tarinfo.uname or tarinfo.uid,
+                                 tarinfo.gname or tarinfo.gid), end=' ')
+                if tarinfo.ischr() or tarinfo.isblk():
+                    print("%10s" % ("%d,%d" \
+                                    % (tarinfo.devmajor, tarinfo.devminor)), end=' ')
+                else:
+                    print("%10d" % tarinfo.size, end=' ')
+                print("%d-%02d-%02d %02d:%02d:%02d" \
+                      % time.localtime(tarinfo.mtime)[:6], end=' ')
+
+            print(tarinfo.name + ("/" if tarinfo.isdir() else ""), end=' ')
+
+            if verbose:
+                if tarinfo.issym():
+                    print("->", tarinfo.linkname, end=' ')
+                if tarinfo.islnk():
+                    print("link to", tarinfo.linkname, end=' ')
+            print()
+
+    def add(self, name, arcname=None, recursive=True, exclude=None, filter=None):
+        """Add the file `name' to the archive. `name' may be any type of file
+           (directory, fifo, symbolic link, etc.). If given, `arcname'
+           specifies an alternative name for the file in the archive.
+           Directories are added recursively by default. This can be avoided by
+           setting `recursive' to False. `exclude' is a function that should
+           return True for each filename to be excluded. `filter' is a function
+           that expects a TarInfo object argument and returns the changed
+           TarInfo object, if it returns None the TarInfo object will be
+           excluded from the archive.
+        """
+        self._check("aw")
+
+        if arcname is None:
+            arcname = name
+
+        # Exclude pathnames.
+        if exclude is not None:
+            import warnings
+            warnings.warn("use the filter argument instead",
+                    DeprecationWarning, 2)
+            if exclude(name):
+                self._dbg(2, "tarfile: Excluded %r" % name)
+                return
+
+        # Skip if somebody tries to archive the archive...
+        if self.name is not None and os.path.abspath(name) == self.name:
+            self._dbg(2, "tarfile: Skipped %r" % name)
+            return
+
+        self._dbg(1, name)
+
+        # Create a TarInfo object from the file.
+        tarinfo = self.gettarinfo(name, arcname)
+
+        if tarinfo is None:
+            self._dbg(1, "tarfile: Unsupported type %r" % name)
+            return
+
+        # Change or exclude the TarInfo object.
+        if filter is not None:
+            tarinfo = filter(tarinfo)
+            if tarinfo is None:
+                self._dbg(2, "tarfile: Excluded %r" % name)
+                return
+
+        # Append the tar header and data to the archive.
+        if tarinfo.isreg():
+            f = bltn_open(name, "rb")
+            self.addfile(tarinfo, f)
+            f.close()
+
+        elif tarinfo.isdir():
+            self.addfile(tarinfo)
+            if recursive:
+                for f in os.listdir(name):
+                    self.add(os.path.join(name, f), os.path.join(arcname, f),
+                            recursive, exclude, filter=filter)
+
+        else:
+            self.addfile(tarinfo)
+
+    def addfile(self, tarinfo, fileobj=None):
+        """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
+           given, tarinfo.size bytes are read from it and added to the archive.
+           You can create TarInfo objects using gettarinfo().
+           On Windows platforms, `fileobj' should always be opened with mode
+           'rb' to avoid irritation about the file size.
+        """
+        self._check("aw")
+
+        tarinfo = copy.copy(tarinfo)
+
+        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
+        self.fileobj.write(buf)
+        self.offset += len(buf)
+
+        # If there's data to follow, append it.
+        if fileobj is not None:
+            copyfileobj(fileobj, self.fileobj, tarinfo.size)
+            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
+            if remainder > 0:
+                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
+                blocks += 1
+            self.offset += blocks * BLOCKSIZE
+
+        self.members.append(tarinfo)
+
+    def extractall(self, path=".", members=None):
+        """Extract all members from the archive to the current working
+           directory and set owner, modification time and permissions on
+           directories afterwards. `path' specifies a different directory
+           to extract to. `members' is optional and must be a subset of the
+           list returned by getmembers().
+        """
+        directories = []
+
+        if members is None:
+            members = self
+
+        for tarinfo in members:
+            if tarinfo.isdir():
+                # Extract directories with a safe mode.
+                directories.append(tarinfo)
+                tarinfo = copy.copy(tarinfo)
+                tarinfo.mode = 0o700
+            # Do not set_attrs directories, as we will do that further down
+            self.extract(tarinfo, path, set_attrs=not tarinfo.isdir())
+
+        # Reverse sort directories.
+        directories.sort(key=lambda a: a.name)
+        directories.reverse()
+
+        # Set correct owner, mtime and filemode on directories.
+        for tarinfo in directories:
+            dirpath = os.path.join(path, tarinfo.name)
+            try:
+                self.chown(tarinfo, dirpath)
+                self.utime(tarinfo, dirpath)
+                self.chmod(tarinfo, dirpath)
+            except ExtractError as e:
+                if self.errorlevel > 1:
+                    raise
+                else:
+                    self._dbg(1, "tarfile: %s" % e)
+
+    def extract(self, member, path="", set_attrs=True):
+        """Extract a member from the archive to the current working directory,
+           using its full name. Its file information is extracted as accurately
+           as possible. `member' may be a filename or a TarInfo object. You can
+           specify a different directory using `path'. File attributes (owner,
+           mtime, mode) are set unless `set_attrs' is False.
+        """
+        self._check("r")
+
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        # Prepare the link target for makelink().
+        if tarinfo.islnk():
+            tarinfo._link_target = os.path.join(path, tarinfo.linkname)
+
+        try:
+            self._extract_member(tarinfo, os.path.join(path, tarinfo.name),
+                                 set_attrs=set_attrs)
+        except EnvironmentError as e:
+            if self.errorlevel > 0:
+                raise
+            else:
+                if e.filename is None:
+                    self._dbg(1, "tarfile: %s" % e.strerror)
+                else:
+                    self._dbg(1, "tarfile: %s %r" % (e.strerror, e.filename))
+        except ExtractError as e:
+            if self.errorlevel > 1:
+                raise
+            else:
+                self._dbg(1, "tarfile: %s" % e)
+
+    def extractfile(self, member):
+        """Extract a member from the archive as a file object. `member' may be
+           a filename or a TarInfo object. If `member' is a regular file, a
+           file-like object is returned. If `member' is a link, a file-like
+           object is constructed from the link's target. If `member' is none of
+           the above, None is returned.
+           The file-like object is read-only and provides the following
+           methods: read(), readline(), readlines(), seek() and tell()
+        """
+        self._check("r")
+
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        if tarinfo.isreg():
+            return self.fileobject(self, tarinfo)
+
+        elif tarinfo.type not in SUPPORTED_TYPES:
+            # If a member's type is unknown, it is treated as a
+            # regular file.
+            return self.fileobject(self, tarinfo)
+
+        elif tarinfo.islnk() or tarinfo.issym():
+            if isinstance(self.fileobj, _Stream):
+                # A small but ugly workaround for the case that someone tries
+                # to extract a (sym)link as a file-object from a non-seekable
+                # stream of tar blocks.
+                raise StreamError("cannot extract (sym)link as file object")
+            else:
+                # A (sym)link's file object is its target's file object.
+                return self.extractfile(self._find_link_target(tarinfo))
+        else:
+            # If there's no data associated with the member (directory, chrdev,
+            # blkdev, etc.), return None instead of a file object.
+            return None
+
+    def _extract_member(self, tarinfo, targetpath, set_attrs=True):
+        """Extract the TarInfo object tarinfo to a physical
+           file called targetpath.
+        """
+        # Fetch the TarInfo object for the given name
+        # and build the destination pathname, replacing
+        # forward slashes to platform specific separators.
+        targetpath = targetpath.rstrip("/")
+        targetpath = targetpath.replace("/", os.sep)
+
+        # Create all upper directories.
+        upperdirs = os.path.dirname(targetpath)
+        if upperdirs and not os.path.exists(upperdirs):
+            # Create directories that are not part of the archive with
+            # default permissions.
+            os.makedirs(upperdirs)
+
+        if tarinfo.islnk() or tarinfo.issym():
+            self._dbg(1, "%s -> %s" % (tarinfo.name, tarinfo.linkname))
+        else:
+            self._dbg(1, tarinfo.name)
+
+        if tarinfo.isreg():
+            self.makefile(tarinfo, targetpath)
+        elif tarinfo.isdir():
+            self.makedir(tarinfo, targetpath)
+        elif tarinfo.isfifo():
+            self.makefifo(tarinfo, targetpath)
+        elif tarinfo.ischr() or tarinfo.isblk():
+            self.makedev(tarinfo, targetpath)
+        elif tarinfo.islnk() or tarinfo.issym():
+            self.makelink(tarinfo, targetpath)
+        elif tarinfo.type not in SUPPORTED_TYPES:
+            self.makeunknown(tarinfo, targetpath)
+        else:
+            self.makefile(tarinfo, targetpath)
+
+        if set_attrs:
+            self.chown(tarinfo, targetpath)
+            if not tarinfo.issym():
+                self.chmod(tarinfo, targetpath)
+                self.utime(tarinfo, targetpath)
+
+    #--------------------------------------------------------------------------
+    # Below are the different file methods. They are called via
+    # _extract_member() when extract() is called. They can be replaced in a
+    # subclass to implement other functionality.
+
+    def makedir(self, tarinfo, targetpath):
+        """Make a directory called targetpath.
+        """
+        try:
+            # Use a safe mode for the directory, the real mode is set
+            # later in _extract_member().
+            os.mkdir(targetpath, 0o700)
+        except EnvironmentError as e:
+            if e.errno != errno.EEXIST:
+                raise
+
+    def makefile(self, tarinfo, targetpath):
+        """Make a file called targetpath.
+        """
+        source = self.fileobj
+        source.seek(tarinfo.offset_data)
+        target = bltn_open(targetpath, "wb")
+        if tarinfo.sparse is not None:
+            for offset, size in tarinfo.sparse:
+                target.seek(offset)
+                copyfileobj(source, target, size)
+        else:
+            copyfileobj(source, target, tarinfo.size)
+        target.seek(tarinfo.size)
+        target.truncate()
+        target.close()
+
+    def makeunknown(self, tarinfo, targetpath):
+        """Make a file from a TarInfo object with an unknown type
+           at targetpath.
+        """
+        self.makefile(tarinfo, targetpath)
+        self._dbg(1, "tarfile: Unknown file type %r, " \
+                     "extracted as regular file." % tarinfo.type)
+
+    def makefifo(self, tarinfo, targetpath):
+        """Make a fifo called targetpath.
+        """
+        if hasattr(os, "mkfifo"):
+            os.mkfifo(targetpath)
+        else:
+            raise ExtractError("fifo not supported by system")
+
+    def makedev(self, tarinfo, targetpath):
+        """Make a character or block device called targetpath.
+        """
+        if not hasattr(os, "mknod") or not hasattr(os, "makedev"):
+            raise ExtractError("special devices not supported by system")
+
+        mode = tarinfo.mode
+        if tarinfo.isblk():
+            mode |= stat.S_IFBLK
+        else:
+            mode |= stat.S_IFCHR
+
+        os.mknod(targetpath, mode,
+                 os.makedev(tarinfo.devmajor, tarinfo.devminor))
+
+    def makelink(self, tarinfo, targetpath):
+        """Make a (symbolic) link called targetpath. If it cannot be created
+          (platform limitation), we try to make a copy of the referenced file
+          instead of a link.
+        """
+        try:
+            # For systems that support symbolic and hard links.
+            if tarinfo.issym():
+                os.symlink(tarinfo.linkname, targetpath)
+            else:
+                # See extract().
+                if os.path.exists(tarinfo._link_target):
+                    os.link(tarinfo._link_target, targetpath)
+                else:
+                    self._extract_member(self._find_link_target(tarinfo),
+                                         targetpath)
+        except symlink_exception:
+            if tarinfo.issym():
+                linkpath = os.path.join(os.path.dirname(tarinfo.name),
+                                        tarinfo.linkname)
+            else:
+                linkpath = tarinfo.linkname
+        else:
+            try:
+                self._extract_member(self._find_link_target(tarinfo),
+                                     targetpath)
+            except KeyError:
+                raise ExtractError("unable to resolve link inside archive")
+
+    def chown(self, tarinfo, targetpath):
+        """Set owner of targetpath according to tarinfo.
+        """
+        if pwd and hasattr(os, "geteuid") and os.geteuid() == 0:
+            # We have to be root to do so.
+            try:
+                g = grp.getgrnam(tarinfo.gname)[2]
+            except KeyError:
+                g = tarinfo.gid
+            try:
+                u = pwd.getpwnam(tarinfo.uname)[2]
+            except KeyError:
+                u = tarinfo.uid
+            try:
+                if tarinfo.issym() and hasattr(os, "lchown"):
+                    os.lchown(targetpath, u, g)
+                else:
+                    if sys.platform != "os2emx":
+                        os.chown(targetpath, u, g)
+            except EnvironmentError as e:
+                raise ExtractError("could not change owner")
+
+    def chmod(self, tarinfo, targetpath):
+        """Set file permissions of targetpath according to tarinfo.
+        """
+        if hasattr(os, 'chmod'):
+            try:
+                os.chmod(targetpath, tarinfo.mode)
+            except EnvironmentError as e:
+                raise ExtractError("could not change mode")
+
+    def utime(self, tarinfo, targetpath):
+        """Set modification time of targetpath according to tarinfo.
+        """
+        if not hasattr(os, 'utime'):
+            return
+        try:
+            os.utime(targetpath, (tarinfo.mtime, tarinfo.mtime))
+        except EnvironmentError as e:
+            raise ExtractError("could not change modification time")
+
+    #--------------------------------------------------------------------------
+    def next(self):
+        """Return the next member of the archive as a TarInfo object, when
+           TarFile is opened for reading. Return None if there is no more
+           available.
+        """
+        self._check("ra")
+        if self.firstmember is not None:
+            m = self.firstmember
+            self.firstmember = None
+            return m
+
+        # Read the next block.
+        self.fileobj.seek(self.offset)
+        tarinfo = None
+        while True:
+            try:
+                tarinfo = self.tarinfo.fromtarfile(self)
+            except EOFHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+            except InvalidHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+                elif self.offset == 0:
+                    raise ReadError(str(e))
+            except EmptyHeaderError:
+                if self.offset == 0:
+                    raise ReadError("empty file")
+            except TruncatedHeaderError as e:
+                if self.offset == 0:
+                    raise ReadError(str(e))
+            except SubsequentHeaderError as e:
+                raise ReadError(str(e))
+            break
+
+        if tarinfo is not None:
+            self.members.append(tarinfo)
+        else:
+            self._loaded = True
+
+        return tarinfo
+
+    #--------------------------------------------------------------------------
+    # Little helper methods:
+
+    def _getmember(self, name, tarinfo=None, normalize=False):
+        """Find an archive member by name from bottom to top.
+           If tarinfo is given, it is used as the starting point.
+        """
+        # Ensure that all members have been loaded.
+        members = self.getmembers()
+
+        # Limit the member search list up to tarinfo.
+        if tarinfo is not None:
+            members = members[:members.index(tarinfo)]
+
+        if normalize:
+            name = os.path.normpath(name)
+
+        for member in reversed(members):
+            if normalize:
+                member_name = os.path.normpath(member.name)
+            else:
+                member_name = member.name
+
+            if name == member_name:
+                return member
+
+    def _load(self):
+        """Read through the entire archive file and look for readable
+           members.
+        """
+        while True:
+            tarinfo = self.next()
+            if tarinfo is None:
+                break
+        self._loaded = True
+
+    def _check(self, mode=None):
+        """Check if TarFile is still open, and if the operation's mode
+           corresponds to TarFile's mode.
+        """
+        if self.closed:
+            raise IOError("%s is closed" % self.__class__.__name__)
+        if mode is not None and self.mode not in mode:
+            raise IOError("bad operation for mode %r" % self.mode)
+
+    def _find_link_target(self, tarinfo):
+        """Find the target member of a symlink or hardlink member in the
+           archive.
+        """
+        if tarinfo.issym():
+            # Always search the entire archive.
+            linkname = os.path.dirname(tarinfo.name) + "/" + tarinfo.linkname
+            limit = None
+        else:
+            # Search the archive before the link, because a hard link is
+            # just a reference to an already archived file.
+            linkname = tarinfo.linkname
+            limit = tarinfo
+
+        member = self._getmember(linkname, tarinfo=limit, normalize=True)
+        if member is None:
+            raise KeyError("linkname %r not found" % linkname)
+        return member
+
+    def __iter__(self):
+        """Provide an iterator object.
+        """
+        if self._loaded:
+            return iter(self.members)
+        else:
+            return TarIter(self)
+
+    def _dbg(self, level, msg):
+        """Write debugging output to sys.stderr.
+        """
+        if level <= self.debug:
+            print(msg, file=sys.stderr)
+
+    def __enter__(self):
+        self._check()
+        return self
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            self.close()
+        else:
+            # An exception occurred. We must not call close() because
+            # it would try to write end-of-archive blocks and padding.
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+# class TarFile
+
+class TarIter(object):
+    """Iterator Class.
+
+       for tarinfo in TarFile(...):
+           suite...
+    """
+
+    def __init__(self, tarfile):
+        """Construct a TarIter object.
+        """
+        self.tarfile = tarfile
+        self.index = 0
+    def __iter__(self):
+        """Return iterator object.
+        """
+        return self
+
+    def __next__(self):
+        """Return the next item using TarFile's next() method.
+           When all members have been read, set TarFile as _loaded.
+        """
+        # Fix for SF #1100429: Under rare circumstances it can
+        # happen that getmembers() is called during iteration,
+        # which will cause TarIter to stop prematurely.
+        if not self.tarfile._loaded:
+            tarinfo = self.tarfile.next()
+            if not tarinfo:
+                self.tarfile._loaded = True
+                raise StopIteration
+        else:
+            try:
+                tarinfo = self.tarfile.members[self.index]
+            except IndexError:
+                raise StopIteration
+        self.index += 1
+        return tarinfo
+
+    next = __next__ # for Python 2.x
+
+#--------------------
+# exported functions
+#--------------------
+def is_tarfile(name):
+    """Return True if name points to a tar archive that we
+       are able to handle, else return False.
+    """
+    try:
+        t = open(name)
+        t.close()
+        return True
+    except TarError:
+        return False
+
+bltn_open = open
+open = TarFile.open
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/compat.py
new file mode 100644
index 00000000..ff328c8e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/compat.py
@@ -0,0 +1,1120 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import absolute_import
+
+import os
+import re
+import sys
+
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+
+if sys.version_info[0] < 3:  # pragma: no cover
+    from StringIO import StringIO
+    string_types = basestring,
+    text_type = unicode
+    from types import FileType as file_type
+    import __builtin__ as builtins
+    import ConfigParser as configparser
+    from ._backport import shutil
+    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
+    from urllib import (urlretrieve, quote as _quote, unquote, url2pathname,
+                        pathname2url, ContentTooShortError, splittype)
+
+    def quote(s):
+        if isinstance(s, unicode):
+            s = s.encode('utf-8')
+        return _quote(s)
+
+    import urllib2
+    from urllib2 import (Request, urlopen, URLError, HTTPError,
+                         HTTPBasicAuthHandler, HTTPPasswordMgr,
+                         HTTPHandler, HTTPRedirectHandler,
+                         build_opener)
+    if ssl:
+        from urllib2 import HTTPSHandler
+    import httplib
+    import xmlrpclib
+    import Queue as queue
+    from HTMLParser import HTMLParser
+    import htmlentitydefs
+    raw_input = raw_input
+    from itertools import ifilter as filter
+    from itertools import ifilterfalse as filterfalse
+
+    _userprog = None
+    def splituser(host):
+        """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+        global _userprog
+        if _userprog is None:
+            import re
+            _userprog = re.compile('^(.*)@(.*)$')
+
+        match = _userprog.match(host)
+        if match: return match.group(1, 2)
+        return None, host
+
+else:  # pragma: no cover
+    from io import StringIO
+    string_types = str,
+    text_type = str
+    from io import TextIOWrapper as file_type
+    import builtins
+    import configparser
+    import shutil
+    from urllib.parse import (urlparse, urlunparse, urljoin, splituser, quote,
+                              unquote, urlsplit, urlunsplit, splittype)
+    from urllib.request import (urlopen, urlretrieve, Request, url2pathname,
+                                pathname2url,
+                                HTTPBasicAuthHandler, HTTPPasswordMgr,
+                                HTTPHandler, HTTPRedirectHandler,
+                                build_opener)
+    if ssl:
+        from urllib.request import HTTPSHandler
+    from urllib.error import HTTPError, URLError, ContentTooShortError
+    import http.client as httplib
+    import urllib.request as urllib2
+    import xmlrpc.client as xmlrpclib
+    import queue
+    from html.parser import HTMLParser
+    import html.entities as htmlentitydefs
+    raw_input = input
+    from itertools import filterfalse
+    filter = filter
+
+try:
+    from ssl import match_hostname, CertificateError
+except ImportError: # pragma: no cover
+    class CertificateError(ValueError):
+        pass
+
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        http://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        parts = dn.split('.')
+        leftmost, remainder = parts[0], parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate, match_hostname needs a "
+                             "SSL socket or SSL context with either "
+                             "CERT_OPTIONAL or CERT_REQUIRED")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+try:
+    from types import SimpleNamespace as Container
+except ImportError:  # pragma: no cover
+    class Container(object):
+        """
+        A generic container for when multiple values need to be returned
+        """
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+
+try:
+    from shutil import which
+except ImportError:  # pragma: no cover
+    # Implementation from Python 3.3
+    def which(cmd, mode=os.F_OK | os.X_OK, path=None):
+        """Given a command, mode, and a PATH string, return the path which
+        conforms to the given mode on the PATH, or None if there is no such
+        file.
+
+        `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
+        of os.environ.get("PATH"), or can be overridden with a custom search
+        path.
+
+        """
+        # Check that a given file can be accessed with the correct mode.
+        # Additionally check that `file` is not a directory, as on Windows
+        # directories pass the os.access check.
+        def _access_check(fn, mode):
+            return (os.path.exists(fn) and os.access(fn, mode)
+                    and not os.path.isdir(fn))
+
+        # If we're given a path with a directory part, look it up directly rather
+        # than referring to PATH directories. This includes checking relative to the
+        # current directory, e.g. ./script
+        if os.path.dirname(cmd):
+            if _access_check(cmd, mode):
+                return cmd
+            return None
+
+        if path is None:
+            path = os.environ.get("PATH", os.defpath)
+        if not path:
+            return None
+        path = path.split(os.pathsep)
+
+        if sys.platform == "win32":
+            # The current directory takes precedence on Windows.
+            if not os.curdir in path:
+                path.insert(0, os.curdir)
+
+            # PATHEXT is necessary to check on Windows.
+            pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
+            # See if the given file matches any of the expected path extensions.
+            # This will allow us to short circuit when given "python.exe".
+            # If it does match, only test that one, otherwise we have to try
+            # others.
+            if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
+                files = [cmd]
+            else:
+                files = [cmd + ext for ext in pathext]
+        else:
+            # On other platforms you don't have things like PATHEXT to tell you
+            # what file suffixes are executable, so just pass on cmd as-is.
+            files = [cmd]
+
+        seen = set()
+        for dir in path:
+            normdir = os.path.normcase(dir)
+            if not normdir in seen:
+                seen.add(normdir)
+                for thefile in files:
+                    name = os.path.join(dir, thefile)
+                    if _access_check(name, mode):
+                        return name
+        return None
+
+
+# ZipFile is a context manager in 2.7, but not in 2.6
+
+from zipfile import ZipFile as BaseZipFile
+
+if hasattr(BaseZipFile, '__enter__'):  # pragma: no cover
+    ZipFile = BaseZipFile
+else:  # pragma: no cover
+    from zipfile import ZipExtFile as BaseZipExtFile
+
+    class ZipExtFile(BaseZipExtFile):
+        def __init__(self, base):
+            self.__dict__.update(base.__dict__)
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+    class ZipFile(BaseZipFile):
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+        def open(self, *args, **kwargs):
+            base = BaseZipFile.open(self, *args, **kwargs)
+            return ZipExtFile(base)
+
+try:
+    from platform import python_implementation
+except ImportError: # pragma: no cover
+    def python_implementation():
+        """Return a string identifying the Python implementation."""
+        if 'PyPy' in sys.version:
+            return 'PyPy'
+        if os.name == 'java':
+            return 'Jython'
+        if sys.version.startswith('IronPython'):
+            return 'IronPython'
+        return 'CPython'
+
+try:
+    import sysconfig
+except ImportError: # pragma: no cover
+    from ._backport import sysconfig
+
+try:
+    callable = callable
+except NameError:   # pragma: no cover
+    from collections import Callable
+
+    def callable(obj):
+        return isinstance(obj, Callable)
+
+
+try:
+    fsencode = os.fsencode
+    fsdecode = os.fsdecode
+except AttributeError:  # pragma: no cover
+    # Issue #99: on some systems (e.g. containerised),
+    # sys.getfilesystemencoding() returns None, and we need a real value,
+    # so fall back to utf-8. From the CPython 2.7 docs relating to Unix and
+    # sys.getfilesystemencoding(): the return value is "the user’s preference
+    # according to the result of nl_langinfo(CODESET), or None if the
+    # nl_langinfo(CODESET) failed."
+    _fsencoding = sys.getfilesystemencoding() or 'utf-8'
+    if _fsencoding == 'mbcs':
+        _fserrors = 'strict'
+    else:
+        _fserrors = 'surrogateescape'
+
+    def fsencode(filename):
+        if isinstance(filename, bytes):
+            return filename
+        elif isinstance(filename, text_type):
+            return filename.encode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+    def fsdecode(filename):
+        if isinstance(filename, text_type):
+            return filename
+        elif isinstance(filename, bytes):
+            return filename.decode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+try:
+    from tokenize import detect_encoding
+except ImportError: # pragma: no cover
+    from codecs import BOM_UTF8, lookup
+    import re
+
+    cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
+
+    def _get_normal_name(orig_enc):
+        """Imitates get_normal_name in tokenizer.c."""
+        # Only care about the first 12 characters.
+        enc = orig_enc[:12].lower().replace("_", "-")
+        if enc == "utf-8" or enc.startswith("utf-8-"):
+            return "utf-8"
+        if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or \
+           enc.startswith(("latin-1-", "iso-8859-1-", "iso-latin-1-")):
+            return "iso-8859-1"
+        return orig_enc
+
+    def detect_encoding(readline):
+        """
+        The detect_encoding() function is used to detect the encoding that should
+        be used to decode a Python source file.  It requires one argument, readline,
+        in the same way as the tokenize() generator.
+
+        It will call readline a maximum of twice, and return the encoding used
+        (as a string) and a list of any lines (left as bytes) it has read in.
+
+        It detects the encoding from the presence of a utf-8 bom or an encoding
+        cookie as specified in pep-0263.  If both a bom and a cookie are present,
+        but disagree, a SyntaxError will be raised.  If the encoding cookie is an
+        invalid charset, raise a SyntaxError.  Note that if a utf-8 bom is found,
+        'utf-8-sig' is returned.
+
+        If no encoding is specified, then the default of 'utf-8' will be returned.
+        """
+        try:
+            filename = readline.__self__.name
+        except AttributeError:
+            filename = None
+        bom_found = False
+        encoding = None
+        default = 'utf-8'
+        def read_or_stop():
+            try:
+                return readline()
+            except StopIteration:
+                return b''
+
+        def find_cookie(line):
+            try:
+                # Decode as UTF-8. Either the line is an encoding declaration,
+                # in which case it should be pure ASCII, or it must be UTF-8
+                # per default encoding.
+                line_string = line.decode('utf-8')
+            except UnicodeDecodeError:
+                msg = "invalid or missing encoding declaration"
+                if filename is not None:
+                    msg = '{} for {!r}'.format(msg, filename)
+                raise SyntaxError(msg)
+
+            matches = cookie_re.findall(line_string)
+            if not matches:
+                return None
+            encoding = _get_normal_name(matches[0])
+            try:
+                codec = lookup(encoding)
+            except LookupError:
+                # This behaviour mimics the Python interpreter
+                if filename is None:
+                    msg = "unknown encoding: " + encoding
+                else:
+                    msg = "unknown encoding for {!r}: {}".format(filename,
+                            encoding)
+                raise SyntaxError(msg)
+
+            if bom_found:
+                if codec.name != 'utf-8':
+                    # This behaviour mimics the Python interpreter
+                    if filename is None:
+                        msg = 'encoding problem: utf-8'
+                    else:
+                        msg = 'encoding problem for {!r}: utf-8'.format(filename)
+                    raise SyntaxError(msg)
+                encoding += '-sig'
+            return encoding
+
+        first = read_or_stop()
+        if first.startswith(BOM_UTF8):
+            bom_found = True
+            first = first[3:]
+            default = 'utf-8-sig'
+        if not first:
+            return default, []
+
+        encoding = find_cookie(first)
+        if encoding:
+            return encoding, [first]
+
+        second = read_or_stop()
+        if not second:
+            return default, [first]
+
+        encoding = find_cookie(second)
+        if encoding:
+            return encoding, [first, second]
+
+        return default, [first, second]
+
+# For converting & <-> &amp; etc.
+try:
+    from html import escape
+except ImportError:
+    from cgi import escape
+if sys.version_info[:2] < (3, 4):
+    unescape = HTMLParser().unescape
+else:
+    from html import unescape
+
+try:
+    from collections import ChainMap
+except ImportError: # pragma: no cover
+    from collections import MutableMapping
+
+    try:
+        from reprlib import recursive_repr as _recursive_repr
+    except ImportError:
+        def _recursive_repr(fillvalue='...'):
+            '''
+            Decorator to make a repr function return fillvalue for a recursive
+            call
+            '''
+
+            def decorating_function(user_function):
+                repr_running = set()
+
+                def wrapper(self):
+                    key = id(self), get_ident()
+                    if key in repr_running:
+                        return fillvalue
+                    repr_running.add(key)
+                    try:
+                        result = user_function(self)
+                    finally:
+                        repr_running.discard(key)
+                    return result
+
+                # Can't use functools.wraps() here because of bootstrap issues
+                wrapper.__module__ = getattr(user_function, '__module__')
+                wrapper.__doc__ = getattr(user_function, '__doc__')
+                wrapper.__name__ = getattr(user_function, '__name__')
+                wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
+                return wrapper
+
+            return decorating_function
+
+    class ChainMap(MutableMapping):
+        ''' A ChainMap groups multiple dicts (or other mappings) together
+        to create a single, updateable view.
+
+        The underlying mappings are stored in a list.  That list is public and can
+        accessed or updated using the *maps* attribute.  There is no other state.
+
+        Lookups search the underlying mappings successively until a key is found.
+        In contrast, writes, updates, and deletions only operate on the first
+        mapping.
+
+        '''
+
+        def __init__(self, *maps):
+            '''Initialize a ChainMap by setting *maps* to the given mappings.
+            If no mappings are provided, a single empty dictionary is used.
+
+            '''
+            self.maps = list(maps) or [{}]          # always at least one map
+
+        def __missing__(self, key):
+            raise KeyError(key)
+
+        def __getitem__(self, key):
+            for mapping in self.maps:
+                try:
+                    return mapping[key]             # can't use 'key in mapping' with defaultdict
+                except KeyError:
+                    pass
+            return self.__missing__(key)            # support subclasses that define __missing__
+
+        def get(self, key, default=None):
+            return self[key] if key in self else default
+
+        def __len__(self):
+            return len(set().union(*self.maps))     # reuses stored hash values if possible
+
+        def __iter__(self):
+            return iter(set().union(*self.maps))
+
+        def __contains__(self, key):
+            return any(key in m for m in self.maps)
+
+        def __bool__(self):
+            return any(self.maps)
+
+        @_recursive_repr()
+        def __repr__(self):
+            return '{0.__class__.__name__}({1})'.format(
+                self, ', '.join(map(repr, self.maps)))
+
+        @classmethod
+        def fromkeys(cls, iterable, *args):
+            'Create a ChainMap with a single dict created from the iterable.'
+            return cls(dict.fromkeys(iterable, *args))
+
+        def copy(self):
+            'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'
+            return self.__class__(self.maps[0].copy(), *self.maps[1:])
+
+        __copy__ = copy
+
+        def new_child(self):                        # like Django's Context.push()
+            'New ChainMap with a new dict followed by all previous maps.'
+            return self.__class__({}, *self.maps)
+
+        @property
+        def parents(self):                          # like Django's Context.pop()
+            'New ChainMap from maps[1:].'
+            return self.__class__(*self.maps[1:])
+
+        def __setitem__(self, key, value):
+            self.maps[0][key] = value
+
+        def __delitem__(self, key):
+            try:
+                del self.maps[0][key]
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def popitem(self):
+            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
+            try:
+                return self.maps[0].popitem()
+            except KeyError:
+                raise KeyError('No keys found in the first mapping.')
+
+        def pop(self, key, *args):
+            'Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].'
+            try:
+                return self.maps[0].pop(key, *args)
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def clear(self):
+            'Clear maps[0], leaving maps[1:] intact.'
+            self.maps[0].clear()
+
+try:
+    from importlib.util import cache_from_source  # Python >= 3.4
+except ImportError:  # pragma: no cover
+    try:
+        from imp import cache_from_source
+    except ImportError:  # pragma: no cover
+        def cache_from_source(path, debug_override=None):
+            assert path.endswith('.py')
+            if debug_override is None:
+                debug_override = __debug__
+            if debug_override:
+                suffix = 'c'
+            else:
+                suffix = 'o'
+            return path + suffix
+
+try:
+    from collections import OrderedDict
+except ImportError: # pragma: no cover
+## {{{ http://code.activestate.com/recipes/576693/ (r9)
+# Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
+# Passes Python2.7's test suite and incorporates all the latest updates.
+    try:
+        from thread import get_ident as _get_ident
+    except ImportError:
+        from dummy_thread import get_ident as _get_ident
+
+    try:
+        from _abcoll import KeysView, ValuesView, ItemsView
+    except ImportError:
+        pass
+
+
+    class OrderedDict(dict):
+        'Dictionary that remembers insertion order'
+        # An inherited dict maps keys to values.
+        # The inherited dict provides __getitem__, __len__, __contains__, and get.
+        # The remaining methods are order-aware.
+        # Big-O running times for all methods are the same as for regular dictionaries.
+
+        # The internal self.__map dictionary maps keys to links in a doubly linked list.
+        # The circular doubly linked list starts and ends with a sentinel element.
+        # The sentinel element never gets deleted (this simplifies the algorithm).
+        # Each link is stored as a list of length three:  [PREV, NEXT, KEY].
+
+        def __init__(self, *args, **kwds):
+            '''Initialize an ordered dictionary.  Signature is the same as for
+            regular dictionaries, but keyword arguments are not recommended
+            because their insertion order is arbitrary.
+
+            '''
+            if len(args) > 1:
+                raise TypeError('expected at most 1 arguments, got %d' % len(args))
+            try:
+                self.__root
+            except AttributeError:
+                self.__root = root = []                     # sentinel node
+                root[:] = [root, root, None]
+                self.__map = {}
+            self.__update(*args, **kwds)
+
+        def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
+            'od.__setitem__(i, y) <==> od[i]=y'
+            # Setting a new item creates a new link which goes at the end of the linked
+            # list, and the inherited dictionary is updated with the new key/value pair.
+            if key not in self:
+                root = self.__root
+                last = root[0]
+                last[1] = root[0] = self.__map[key] = [last, root, key]
+            dict_setitem(self, key, value)
+
+        def __delitem__(self, key, dict_delitem=dict.__delitem__):
+            'od.__delitem__(y) <==> del od[y]'
+            # Deleting an existing item uses self.__map to find the link which is
+            # then removed by updating the links in the predecessor and successor nodes.
+            dict_delitem(self, key)
+            link_prev, link_next, key = self.__map.pop(key)
+            link_prev[1] = link_next
+            link_next[0] = link_prev
+
+        def __iter__(self):
+            'od.__iter__() <==> iter(od)'
+            root = self.__root
+            curr = root[1]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[1]
+
+        def __reversed__(self):
+            'od.__reversed__() <==> reversed(od)'
+            root = self.__root
+            curr = root[0]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[0]
+
+        def clear(self):
+            'od.clear() -> None.  Remove all items from od.'
+            try:
+                for node in self.__map.itervalues():
+                    del node[:]
+                root = self.__root
+                root[:] = [root, root, None]
+                self.__map.clear()
+            except AttributeError:
+                pass
+            dict.clear(self)
+
+        def popitem(self, last=True):
+            '''od.popitem() -> (k, v), return and remove a (key, value) pair.
+            Pairs are returned in LIFO order if last is true or FIFO order if false.
+
+            '''
+            if not self:
+                raise KeyError('dictionary is empty')
+            root = self.__root
+            if last:
+                link = root[0]
+                link_prev = link[0]
+                link_prev[1] = root
+                root[0] = link_prev
+            else:
+                link = root[1]
+                link_next = link[1]
+                root[1] = link_next
+                link_next[0] = root
+            key = link[2]
+            del self.__map[key]
+            value = dict.pop(self, key)
+            return key, value
+
+        # -- the following methods do not depend on the internal structure --
+
+        def keys(self):
+            'od.keys() -> list of keys in od'
+            return list(self)
+
+        def values(self):
+            'od.values() -> list of values in od'
+            return [self[key] for key in self]
+
+        def items(self):
+            'od.items() -> list of (key, value) pairs in od'
+            return [(key, self[key]) for key in self]
+
+        def iterkeys(self):
+            'od.iterkeys() -> an iterator over the keys in od'
+            return iter(self)
+
+        def itervalues(self):
+            'od.itervalues -> an iterator over the values in od'
+            for k in self:
+                yield self[k]
+
+        def iteritems(self):
+            'od.iteritems -> an iterator over the (key, value) items in od'
+            for k in self:
+                yield (k, self[k])
+
+        def update(*args, **kwds):
+            '''od.update(E, **F) -> None.  Update od from dict/iterable E and F.
+
+            If E is a dict instance, does:           for k in E: od[k] = E[k]
+            If E has a .keys() method, does:         for k in E.keys(): od[k] = E[k]
+            Or if E is an iterable of items, does:   for k, v in E: od[k] = v
+            In either case, this is followed by:     for k, v in F.items(): od[k] = v
+
+            '''
+            if len(args) > 2:
+                raise TypeError('update() takes at most 2 positional '
+                                'arguments (%d given)' % (len(args),))
+            elif not args:
+                raise TypeError('update() takes at least 1 argument (0 given)')
+            self = args[0]
+            # Make progressively weaker assumptions about "other"
+            other = ()
+            if len(args) == 2:
+                other = args[1]
+            if isinstance(other, dict):
+                for key in other:
+                    self[key] = other[key]
+            elif hasattr(other, 'keys'):
+                for key in other.keys():
+                    self[key] = other[key]
+            else:
+                for key, value in other:
+                    self[key] = value
+            for key, value in kwds.items():
+                self[key] = value
+
+        __update = update  # let subclasses override update without breaking __init__
+
+        __marker = object()
+
+        def pop(self, key, default=__marker):
+            '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+            If key is not found, d is returned if given, otherwise KeyError is raised.
+
+            '''
+            if key in self:
+                result = self[key]
+                del self[key]
+                return result
+            if default is self.__marker:
+                raise KeyError(key)
+            return default
+
+        def setdefault(self, key, default=None):
+            'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
+            if key in self:
+                return self[key]
+            self[key] = default
+            return default
+
+        def __repr__(self, _repr_running=None):
+            'od.__repr__() <==> repr(od)'
+            if not _repr_running: _repr_running = {}
+            call_key = id(self), _get_ident()
+            if call_key in _repr_running:
+                return '...'
+            _repr_running[call_key] = 1
+            try:
+                if not self:
+                    return '%s()' % (self.__class__.__name__,)
+                return '%s(%r)' % (self.__class__.__name__, self.items())
+            finally:
+                del _repr_running[call_key]
+
+        def __reduce__(self):
+            'Return state information for pickling'
+            items = [[k, self[k]] for k in self]
+            inst_dict = vars(self).copy()
+            for k in vars(OrderedDict()):
+                inst_dict.pop(k, None)
+            if inst_dict:
+                return (self.__class__, (items,), inst_dict)
+            return self.__class__, (items,)
+
+        def copy(self):
+            'od.copy() -> a shallow copy of od'
+            return self.__class__(self)
+
+        @classmethod
+        def fromkeys(cls, iterable, value=None):
+            '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
+            and values equal to v (which defaults to None).
+
+            '''
+            d = cls()
+            for key in iterable:
+                d[key] = value
+            return d
+
+        def __eq__(self, other):
+            '''od.__eq__(y) <==> od==y.  Comparison to another OD is order-sensitive
+            while comparison to a regular mapping is order-insensitive.
+
+            '''
+            if isinstance(other, OrderedDict):
+                return len(self)==len(other) and self.items() == other.items()
+            return dict.__eq__(self, other)
+
+        def __ne__(self, other):
+            return not self == other
+
+        # -- the following methods are only used in Python 2.7 --
+
+        def viewkeys(self):
+            "od.viewkeys() -> a set-like object providing a view on od's keys"
+            return KeysView(self)
+
+        def viewvalues(self):
+            "od.viewvalues() -> an object providing a view on od's values"
+            return ValuesView(self)
+
+        def viewitems(self):
+            "od.viewitems() -> a set-like object providing a view on od's items"
+            return ItemsView(self)
+
+try:
+    from logging.config import BaseConfigurator, valid_ident
+except ImportError: # pragma: no cover
+    IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
+
+
+    def valid_ident(s):
+        m = IDENTIFIER.match(s)
+        if not m:
+            raise ValueError('Not a valid Python identifier: %r' % s)
+        return True
+
+
+    # The ConvertingXXX classes are wrappers around standard Python containers,
+    # and they serve to convert any suitable values in the container. The
+    # conversion converts base dicts, lists and tuples to their wrapped
+    # equivalents, whereas strings which match a conversion format are converted
+    # appropriately.
+    #
+    # Each wrapper should have a configurator attribute holding the actual
+    # configurator to use for conversion.
+
+    class ConvertingDict(dict):
+        """A converting dictionary wrapper."""
+
+        def __getitem__(self, key):
+            value = dict.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def get(self, key, default=None):
+            value = dict.get(self, key, default)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    def pop(self, key, default=None):
+        value = dict.pop(self, key, default)
+        result = self.configurator.convert(value)
+        if value is not result:
+            if type(result) in (ConvertingDict, ConvertingList,
+                                ConvertingTuple):
+                result.parent = self
+                result.key = key
+        return result
+
+    class ConvertingList(list):
+        """A converting list wrapper."""
+        def __getitem__(self, key):
+            value = list.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def pop(self, idx=-1):
+            value = list.pop(self, idx)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+            return result
+
+    class ConvertingTuple(tuple):
+        """A converting tuple wrapper."""
+        def __getitem__(self, key):
+            value = tuple.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    class BaseConfigurator(object):
+        """
+        The configurator base class which defines some useful defaults.
+        """
+
+        CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
+
+        WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
+        DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
+        INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
+        DIGIT_PATTERN = re.compile(r'^\d+$')
+
+        value_converters = {
+            'ext' : 'ext_convert',
+            'cfg' : 'cfg_convert',
+        }
+
+        # We might want to use a different one, e.g. importlib
+        importer = staticmethod(__import__)
+
+        def __init__(self, config):
+            self.config = ConvertingDict(config)
+            self.config.configurator = self
+
+        def resolve(self, s):
+            """
+            Resolve strings to objects using standard import and attribute
+            syntax.
+            """
+            name = s.split('.')
+            used = name.pop(0)
+            try:
+                found = self.importer(used)
+                for frag in name:
+                    used += '.' + frag
+                    try:
+                        found = getattr(found, frag)
+                    except AttributeError:
+                        self.importer(used)
+                        found = getattr(found, frag)
+                return found
+            except ImportError:
+                e, tb = sys.exc_info()[1:]
+                v = ValueError('Cannot resolve %r: %s' % (s, e))
+                v.__cause__, v.__traceback__ = e, tb
+                raise v
+
+        def ext_convert(self, value):
+            """Default converter for the ext:// protocol."""
+            return self.resolve(value)
+
+        def cfg_convert(self, value):
+            """Default converter for the cfg:// protocol."""
+            rest = value
+            m = self.WORD_PATTERN.match(rest)
+            if m is None:
+                raise ValueError("Unable to convert %r" % value)
+            else:
+                rest = rest[m.end():]
+                d = self.config[m.groups()[0]]
+                #print d, rest
+                while rest:
+                    m = self.DOT_PATTERN.match(rest)
+                    if m:
+                        d = d[m.groups()[0]]
+                    else:
+                        m = self.INDEX_PATTERN.match(rest)
+                        if m:
+                            idx = m.groups()[0]
+                            if not self.DIGIT_PATTERN.match(idx):
+                                d = d[idx]
+                            else:
+                                try:
+                                    n = int(idx) # try as number first (most likely)
+                                    d = d[n]
+                                except TypeError:
+                                    d = d[idx]
+                    if m:
+                        rest = rest[m.end():]
+                    else:
+                        raise ValueError('Unable to convert '
+                                         '%r at %r' % (value, rest))
+            #rest should be empty
+            return d
+
+        def convert(self, value):
+            """
+            Convert values to an appropriate type. dicts, lists and tuples are
+            replaced by their converting alternatives. Strings are checked to
+            see if they have a conversion format and are converted if they do.
+            """
+            if not isinstance(value, ConvertingDict) and isinstance(value, dict):
+                value = ConvertingDict(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingList) and isinstance(value, list):
+                value = ConvertingList(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingTuple) and\
+                     isinstance(value, tuple):
+                value = ConvertingTuple(value)
+                value.configurator = self
+            elif isinstance(value, string_types):
+                m = self.CONVERT_PATTERN.match(value)
+                if m:
+                    d = m.groupdict()
+                    prefix = d['prefix']
+                    converter = self.value_converters.get(prefix, None)
+                    if converter:
+                        suffix = d['suffix']
+                        converter = getattr(self, converter)
+                        value = converter(suffix)
+            return value
+
+        def configure_custom(self, config):
+            """Configure an object with a user-supplied factory."""
+            c = config.pop('()')
+            if not callable(c):
+                c = self.resolve(c)
+            props = config.pop('.', None)
+            # Check for valid identifiers
+            kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
+            result = c(**kwargs)
+            if props:
+                for name, value in props.items():
+                    setattr(result, name, value)
+            return result
+
+        def as_tuple(self, value):
+            """Utility function which converts lists to tuples."""
+            if isinstance(value, list):
+                value = tuple(value)
+            return value
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/database.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/database.py
new file mode 100644
index 00000000..b13cdac9
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+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/database.py
@@ -0,0 +1,1339 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""PEP 376 implementation."""
+
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import contextlib
+import hashlib
+import logging
+import os
+import posixpath
+import sys
+import zipimport
+
+from . import DistlibException, resources
+from .compat import StringIO
+from .version import get_scheme, UnsupportedVersionError
+from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
+                       LEGACY_METADATA_FILENAME)
+from .util import (parse_requirement, cached_property, parse_name_and_version,
+                   read_exports, write_exports, CSVReader, CSVWriter)
+
+
+__all__ = ['Distribution', 'BaseInstalledDistribution',
+           'InstalledDistribution', 'EggInfoDistribution',
+           'DistributionPath']
+
+
+logger = logging.getLogger(__name__)
+
+EXPORTS_FILENAME = 'pydist-exports.json'
+COMMANDS_FILENAME = 'pydist-commands.json'
+
+DIST_FILES = ('INSTALLER', METADATA_FILENAME, 'RECORD', 'REQUESTED',
+              'RESOURCES', EXPORTS_FILENAME, 'SHARED')
+
+DISTINFO_EXT = '.dist-info'
+
+
+class _Cache(object):
+    """
+    A simple cache mapping names and .dist-info paths to distributions
+    """
+    def __init__(self):
+        """
+        Initialise an instance. There is normally one for each DistributionPath.
+        """
+        self.name = {}
+        self.path = {}
+        self.generated = False
+
+    def clear(self):
+        """
+        Clear the cache, setting it to its initial state.
+        """
+        self.name.clear()
+        self.path.clear()
+        self.generated = False
+
+    def add(self, dist):
+        """
+        Add a distribution to the cache.
+        :param dist: The distribution to add.
+        """
+        if dist.path not in self.path:
+            self.path[dist.path] = dist
+            self.name.setdefault(dist.key, []).append(dist)
+
+
+class DistributionPath(object):
+    """
+    Represents a set of distributions installed on a path (typically sys.path).
+    """
+    def __init__(self, path=None, include_egg=False):
+        """
+        Create an instance from a path, optionally including legacy (distutils/
+        setuptools/distribute) distributions.
+        :param path: The path to use, as a list of directories. If not specified,
+                     sys.path is used.
+        :param include_egg: If True, this instance will look for and return legacy
+                            distributions as well as those based on PEP 376.
+        """
+        if path is None:
+            path = sys.path
+        self.path = path
+        self._include_dist = True
+        self._include_egg = include_egg
+
+        self._cache = _Cache()
+        self._cache_egg = _Cache()
+        self._cache_enabled = True
+        self._scheme = get_scheme('default')
+
+    def _get_cache_enabled(self):
+        return self._cache_enabled
+
+    def _set_cache_enabled(self, value):
+        self._cache_enabled = value
+
+    cache_enabled = property(_get_cache_enabled, _set_cache_enabled)
+
+    def clear_cache(self):
+        """
+        Clears the internal cache.
+        """
+        self._cache.clear()
+        self._cache_egg.clear()
+
+
+    def _yield_distributions(self):
+        """
+        Yield .dist-info and/or .egg(-info) distributions.
+        """
+        # We need to check if we've seen some resources already, because on
+        # some Linux systems (e.g. some Debian/Ubuntu variants) there are
+        # symlinks which alias other files in the environment.
+        seen = set()
+        for path in self.path:
+            finder = resources.finder_for_path(path)
+            if finder is None:
+                continue
+            r = finder.find('')
+            if not r or not r.is_container:
+                continue
+            rset = sorted(r.resources)
+            for entry in rset:
+                r = finder.find(entry)
+                if not r or r.path in seen:
+                    continue
+                if self._include_dist and entry.endswith(DISTINFO_EXT):
+                    possible_filenames = [METADATA_FILENAME,
+                                          WHEEL_METADATA_FILENAME,
+                                          LEGACY_METADATA_FILENAME]
+                    for metadata_filename in possible_filenames:
+                        metadata_path = posixpath.join(entry, metadata_filename)
+                        pydist = finder.find(metadata_path)
+                        if pydist:
+                            break
+                    else:
+                        continue
+
+                    with contextlib.closing(pydist.as_stream()) as stream:
+                        metadata = Metadata(fileobj=stream, scheme='legacy')
+                    logger.debug('Found %s', r.path)
+                    seen.add(r.path)
+                    yield new_dist_class(r.path, metadata=metadata,
+                                         env=self)
+                elif self._include_egg and entry.endswith(('.egg-info',
+                                                          '.egg')):
+                    logger.debug('Found %s', r.path)
+                    seen.add(r.path)
+                    yield old_dist_class(r.path, self)
+
+    def _generate_cache(self):
+        """
+        Scan the path for distributions and populate the cache with
+        those that are found.
+        """
+        gen_dist = not self._cache.generated
+        gen_egg = self._include_egg and not self._cache_egg.generated
+        if gen_dist or gen_egg:
+            for dist in self._yield_distributions():
+                if isinstance(dist, InstalledDistribution):
+                    self._cache.add(dist)
+                else:
+                    self._cache_egg.add(dist)
+
+            if gen_dist:
+                self._cache.generated = True
+            if gen_egg:
+                self._cache_egg.generated = True
+
+    @classmethod
+    def distinfo_dirname(cls, name, version):
+        """
+        The *name* and *version* parameters are converted into their
+        filename-escaped form, i.e. any ``'-'`` characters are replaced
+        with ``'_'`` other than the one in ``'dist-info'`` and the one
+        separating the name from the version number.
+
+        :parameter name: is converted to a standard distribution name by replacing
+                         any runs of non- alphanumeric characters with a single
+                         ``'-'``.
+        :type name: string
+        :parameter version: is converted to a standard version string. Spaces
+                            become dots, and all other non-alphanumeric characters
+                            (except dots) become dashes, with runs of multiple
+                            dashes condensed to a single dash.
+        :type version: string
+        :returns: directory name
+        :rtype: string"""
+        name = name.replace('-', '_')
+        return '-'.join([name, version]) + DISTINFO_EXT
+
+    def get_distributions(self):
+        """
+        Provides an iterator that looks for distributions and returns
+        :class:`InstalledDistribution` or
+        :class:`EggInfoDistribution` instances for each one of them.
+
+        :rtype: iterator of :class:`InstalledDistribution` and
+                :class:`EggInfoDistribution` instances
+        """
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                yield dist
+        else:
+            self._generate_cache()
+
+            for dist in self._cache.path.values():
+                yield dist
+
+            if self._include_egg:
+                for dist in self._cache_egg.path.values():
+                    yield dist
+
+    def get_distribution(self, name):
+        """
+        Looks for a named distribution on the path.
+
+        This function only returns the first result found, as no more than one
+        value is expected. If nothing is found, ``None`` is returned.
+
+        :rtype: :class:`InstalledDistribution`, :class:`EggInfoDistribution`
+                or ``None``
+        """
+        result = None
+        name = name.lower()
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                if dist.key == name:
+                    result = dist
+                    break
+        else:
+            self._generate_cache()
+
+            if name in self._cache.name:
+                result = self._cache.name[name][0]
+            elif self._include_egg and name in self._cache_egg.name:
+                result = self._cache_egg.name[name][0]
+        return result
+
+    def provides_distribution(self, name, version=None):
+        """
+        Iterates over all distributions to find which distributions provide *name*.
+        If a *version* is provided, it will be used to filter the results.
+
+        This function only returns the first result found, since no more than
+        one values are expected. If the directory is not found, returns ``None``.
+
+        :parameter version: a version specifier that indicates the version
+                            required, conforming to the format in ``PEP-345``
+
+        :type name: string
+        :type version: string
+        """
+        matcher = None
+        if version is not None:
+            try:
+                matcher = self._scheme.matcher('%s (%s)' % (name, version))
+            except ValueError:
+                raise DistlibException('invalid name or version: %r, %r' %
+                                      (name, version))
+
+        for dist in self.get_distributions():
+            # We hit a problem on Travis where enum34 was installed and doesn't
+            # have a provides attribute ...
+            if not hasattr(dist, 'provides'):
+                logger.debug('No "provides": %s', dist)
+            else:
+                provided = dist.provides
+
+                for p in provided:
+                    p_name, p_ver = parse_name_and_version(p)
+                    if matcher is None:
+                        if p_name == name:
+                            yield dist
+                            break
+                    else:
+                        if p_name == name and matcher.match(p_ver):
+                            yield dist
+                            break
+
+    def get_file_path(self, name, relative_path):
+        """
+        Return the path to a resource file.
+        """
+        dist = self.get_distribution(name)
+        if dist is None:
+            raise LookupError('no distribution named %r found' % name)
+        return dist.get_resource_path(relative_path)
+
+    def get_exported_entries(self, category, name=None):
+        """
+        Return all of the exported entries in a particular category.
+
+        :param category: The category to search for entries.
+        :param name: If specified, only entries with that name are returned.
+        """
+        for dist in self.get_distributions():
+            r = dist.exports
+            if category in r:
+                d = r[category]
+                if name is not None:
+                    if name in d:
+                        yield d[name]
+                else:
+                    for v in d.values():
+                        yield v
+
+
+class Distribution(object):
+    """
+    A base class for distributions, whether installed or from indexes.
+    Either way, it must have some metadata, so that's all that's needed
+    for construction.
+    """
+
+    build_time_dependency = False
+    """
+    Set to True if it's known to be only a build-time dependency (i.e.
+    not needed after installation).
+    """
+
+    requested = False
+    """A boolean that indicates whether the ``REQUESTED`` metadata file is
+    present (in other words, whether the package was installed by user
+    request or it was installed as a dependency)."""
+
+    def __init__(self, metadata):
+        """
+        Initialise an instance.
+        :param metadata: The instance of :class:`Metadata` describing this
+        distribution.
+        """
+        self.metadata = metadata
+        self.name = metadata.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        self.version = metadata.version
+        self.locator = None
+        self.digest = None
+        self.extras = None      # additional features requested
+        self.context = None     # environment marker overrides
+        self.download_urls = set()
+        self.digests = {}
+
+    @property
+    def source_url(self):
+        """
+        The source archive download URL for this distribution.
+        """
+        return self.metadata.source_url
+
+    download_url = source_url   # Backward compatibility
+
+    @property
+    def name_and_version(self):
+        """
+        A utility property which displays the name and version in parentheses.
+        """
+        return '%s (%s)' % (self.name, self.version)
+
+    @property
+    def provides(self):
+        """
+        A set of distribution names and versions provided by this distribution.
+        :return: A set of "name (version)" strings.
+        """
+        plist = self.metadata.provides
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in plist:
+            plist.append(s)
+        return plist
+
+    def _get_requirements(self, req_attr):
+        md = self.metadata
+        logger.debug('Getting requirements from metadata %r', md.todict())
+        reqts = getattr(md, req_attr)
+        return set(md.get_requirements(reqts, extras=self.extras,
+                                       env=self.context))
+
+    @property
+    def run_requires(self):
+        return self._get_requirements('run_requires')
+
+    @property
+    def meta_requires(self):
+        return self._get_requirements('meta_requires')
+
+    @property
+    def build_requires(self):
+        return self._get_requirements('build_requires')
+
+    @property
+    def test_requires(self):
+        return self._get_requirements('test_requires')
+
+    @property
+    def dev_requires(self):
+        return self._get_requirements('dev_requires')
+
+    def matches_requirement(self, req):
+        """
+        Say if this instance matches (fulfills) a requirement.
+        :param req: The requirement to match.
+        :rtype req: str
+        :return: True if it matches, else False.
+        """
+        # Requirement may contain extras - parse to lose those
+        # from what's passed to the matcher
+        r = parse_requirement(req)
+        scheme = get_scheme(self.metadata.scheme)
+        try:
+            matcher = scheme.matcher(r.requirement)
+        except UnsupportedVersionError:
+            # XXX compat-mode if cannot read the version
+            logger.warning('could not read version %r - using name only',
+                           req)
+            name = req.split()[0]
+            matcher = scheme.matcher(name)
+
+        name = matcher.key   # case-insensitive
+
+        result = False
+        for p in self.provides:
+            p_name, p_ver = parse_name_and_version(p)
+            if p_name != name:
+                continue
+            try:
+                result = matcher.match(p_ver)
+                break
+            except UnsupportedVersionError:
+                pass
+        return result
+
+    def __repr__(self):
+        """
+        Return a textual representation of this instance,
+        """
+        if self.source_url:
+            suffix = ' [%s]' % self.source_url
+        else:
+            suffix = ''
+        return '<Distribution %s (%s)%s>' % (self.name, self.version, suffix)
+
+    def __eq__(self, other):
+        """
+        See if this distribution is the same as another.
+        :param other: The distribution to compare with. To be equal to one
+                      another. distributions must have the same type, name,
+                      version and source_url.
+        :return: True if it is the same, else False.
+        """
+        if type(other) is not type(self):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.version == other.version and
+                      self.source_url == other.source_url)
+        return result
+
+    def __hash__(self):
+        """
+        Compute hash in a way which matches the equality test.
+        """
+        return hash(self.name) + hash(self.version) + hash(self.source_url)
+
+
+class BaseInstalledDistribution(Distribution):
+    """
+    This is the base class for installed distributions (whether PEP 376 or
+    legacy).
+    """
+
+    hasher = None
+
+    def __init__(self, metadata, path, env=None):
+        """
+        Initialise an instance.
+        :param metadata: An instance of :class:`Metadata` which describes the
+                         distribution. This will normally have been initialised
+                         from a metadata file in the ``path``.
+        :param path:     The path of the ``.dist-info`` or ``.egg-info``
+                         directory for the distribution.
+        :param env:      This is normally the :class:`DistributionPath`
+                         instance where this distribution was found.
+        """
+        super(BaseInstalledDistribution, self).__init__(metadata)
+        self.path = path
+        self.dist_path = env
+
+    def get_hash(self, data, hasher=None):
+        """
+        Get the hash of some data, using a particular hash algorithm, if
+        specified.
+
+        :param data: The data to be hashed.
+        :type data: bytes
+        :param hasher: The name of a hash implementation, supported by hashlib,
+                       or ``None``. Examples of valid values are ``'sha1'``,
+                       ``'sha224'``, ``'sha384'``, '``sha256'``, ``'md5'`` and
+                       ``'sha512'``. If no hasher is specified, the ``hasher``
+                       attribute of the :class:`InstalledDistribution` instance
+                       is used. If the hasher is determined to be ``None``, MD5
+                       is used as the hashing algorithm.
+        :returns: The hash of the data. If a hasher was explicitly specified,
+                  the returned hash will be prefixed with the specified hasher
+                  followed by '='.
+        :rtype: str
+        """
+        if hasher is None:
+            hasher = self.hasher
+        if hasher is None:
+            hasher = hashlib.md5
+            prefix = ''
+        else:
+            hasher = getattr(hashlib, hasher)
+            prefix = '%s=' % self.hasher
+        digest = hasher(data).digest()
+        digest = base64.urlsafe_b64encode(digest).rstrip(b'=').decode('ascii')
+        return '%s%s' % (prefix, digest)
+
+
+class InstalledDistribution(BaseInstalledDistribution):
+    """
+    Created with the *path* of the ``.dist-info`` directory provided to the
+    constructor. It reads the metadata contained in ``pydist.json`` when it is
+    instantiated., or uses a passed in Metadata instance (useful for when
+    dry-run mode is being used).
+    """
+
+    hasher = 'sha256'
+
+    def __init__(self, path, metadata=None, env=None):
+        self.modules = []
+        self.finder = finder = resources.finder_for_path(path)
+        if finder is None:
+            raise ValueError('finder unavailable for %s' % path)
+        if env and env._cache_enabled and path in env._cache.path:
+            metadata = env._cache.path[path].metadata
+        elif metadata is None:
+            r = finder.find(METADATA_FILENAME)
+            # Temporary - for Wheel 0.23 support
+            if r is None:
+                r = finder.find(WHEEL_METADATA_FILENAME)
+            # Temporary - for legacy support
+            if r is None:
+                r = finder.find('METADATA')
+            if r is None:
+                raise ValueError('no %s found in %s' % (METADATA_FILENAME,
+                                                        path))
+            with contextlib.closing(r.as_stream()) as stream:
+                metadata = Metadata(fileobj=stream, scheme='legacy')
+
+        super(InstalledDistribution, self).__init__(metadata, path, env)
+
+        if env and env._cache_enabled:
+            env._cache.add(self)
+
+        r = finder.find('REQUESTED')
+        self.requested = r is not None
+        p  = os.path.join(path, 'top_level.txt')
+        if os.path.exists(p):
+            with open(p, 'rb') as f:
+                data = f.read()
+            self.modules = data.splitlines()
+
+    def __repr__(self):
+        return '<InstalledDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def _get_records(self):
+        """
+        Get the list of installed files for the distribution
+        :return: A list of tuples of path, hash and size. Note that hash and
+                 size might be ``None`` for some entries. The path is exactly
+                 as stored in the file (which is as in PEP 376).
+        """
+        results = []
+        r = self.get_distinfo_resource('RECORD')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as record_reader:
+                # Base location is parent dir of .dist-info dir
+                #base_location = os.path.dirname(self.path)
+                #base_location = os.path.abspath(base_location)
+                for row in record_reader:
+                    missing = [None for i in range(len(row), 3)]
+                    path, checksum, size = row + missing
+                    #if not os.path.isabs(path):
+                    #    path = path.replace('/', os.sep)
+                    #    path = os.path.join(base_location, path)
+                    results.append((path, checksum, size))
+        return results
+
+    @cached_property
+    def exports(self):
+        """
+        Return the information exported by this distribution.
+        :return: A dictionary of exports, mapping an export category to a dict
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries, and keyed by name.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            result = self.read_exports()
+        return result
+
+    def read_exports(self):
+        """
+        Read exports data from a file in .ini format.
+
+        :return: A dictionary of exports, mapping an export category to a list
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            with contextlib.closing(r.as_stream()) as stream:
+                result = read_exports(stream)
+        return result
+
+    def write_exports(self, exports):
+        """
+        Write a dictionary of exports to a file in .ini format.
+        :param exports: A dictionary of exports, mapping an export category to
+                        a list of :class:`ExportEntry` instances describing the
+                        individual export entries.
+        """
+        rf = self.get_distinfo_file(EXPORTS_FILENAME)
+        with open(rf, 'w') as f:
+            write_exports(exports, f)
+
+    def get_resource_path(self, relative_path):
+        """
+        NOTE: This API may change in the future.
+
+        Return the absolute path to a resource file with the given relative
+        path.
+
+        :param relative_path: The path, relative to .dist-info, of the resource
+                              of interest.
+        :return: The absolute path where the resource is to be found.
+        """
+        r = self.get_distinfo_resource('RESOURCES')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as resources_reader:
+                for relative, destination in resources_reader:
+                    if relative == relative_path:
+                        return destination
+        raise KeyError('no resource file with relative path %r '
+                       'is installed' % relative_path)
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: iterator of (path, hash, size)
+        """
+        for result in self._get_records():
+            yield result
+
+    def write_installed_files(self, paths, prefix, dry_run=False):
+        """
+        Writes the ``RECORD`` file, using the ``paths`` iterable passed in. Any
+        existing ``RECORD`` file is silently overwritten.
+
+        prefix is used to determine when to write absolute paths.
+        """
+        prefix = os.path.join(prefix, '')
+        base = os.path.dirname(self.path)
+        base_under_prefix = base.startswith(prefix)
+        base = os.path.join(base, '')
+        record_path = self.get_distinfo_file('RECORD')
+        logger.info('creating %s', record_path)
+        if dry_run:
+            return None
+        with CSVWriter(record_path) as writer:
+            for path in paths:
+                if os.path.isdir(path) or path.endswith(('.pyc', '.pyo')):
+                    # do not put size and hash, as in PEP-376
+                    hash_value = size = ''
+                else:
+                    size = '%d' % os.path.getsize(path)
+                    with open(path, 'rb') as fp:
+                        hash_value = self.get_hash(fp.read())
+                if path.startswith(base) or (base_under_prefix and
+                                             path.startswith(prefix)):
+                    path = os.path.relpath(path, base)
+                writer.writerow((path, hash_value, size))
+
+            # add the RECORD file itself
+            if record_path.startswith(base):
+                record_path = os.path.relpath(record_path, base)
+            writer.writerow((record_path, '', ''))
+        return record_path
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        base = os.path.dirname(self.path)
+        record_path = self.get_distinfo_file('RECORD')
+        for path, hash_value, size in self.list_installed_files():
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path == record_path:
+                continue
+            if not os.path.exists(path):
+                mismatches.append((path, 'exists', True, False))
+            elif os.path.isfile(path):
+                actual_size = str(os.path.getsize(path))
+                if size and actual_size != size:
+                    mismatches.append((path, 'size', size, actual_size))
+                elif hash_value:
+                    if '=' in hash_value:
+                        hasher = hash_value.split('=', 1)[0]
+                    else:
+                        hasher = None
+
+                    with open(path, 'rb') as f:
+                        actual_hash = self.get_hash(f.read(), hasher)
+                        if actual_hash != hash_value:
+                            mismatches.append((path, 'hash', hash_value, actual_hash))
+        return mismatches
+
+    @cached_property
+    def shared_locations(self):
+        """
+        A dictionary of shared locations whose keys are in the set 'prefix',
+        'purelib', 'platlib', 'scripts', 'headers', 'data' and 'namespace'.
+        The corresponding value is the absolute path of that category for
+        this distribution, and takes into account any paths selected by the
+        user at installation time (e.g. via command-line arguments). In the
+        case of the 'namespace' key, this would be a list of absolute paths
+        for the roots of namespace packages in this distribution.
+
+        The first time this property is accessed, the relevant information is
+        read from the SHARED file in the .dist-info directory.
+        """
+        result = {}
+        shared_path = os.path.join(self.path, 'SHARED')
+        if os.path.isfile(shared_path):
+            with codecs.open(shared_path, 'r', encoding='utf-8') as f:
+                lines = f.read().splitlines()
+            for line in lines:
+                key, value = line.split('=', 1)
+                if key == 'namespace':
+                    result.setdefault(key, []).append(value)
+                else:
+                    result[key] = value
+        return result
+
+    def write_shared_locations(self, paths, dry_run=False):
+        """
+        Write shared location information to the SHARED file in .dist-info.
+        :param paths: A dictionary as described in the documentation for
+        :meth:`shared_locations`.
+        :param dry_run: If True, the action is logged but no file is actually
+                        written.
+        :return: The path of the file written to.
+        """
+        shared_path = os.path.join(self.path, 'SHARED')
+        logger.info('creating %s', shared_path)
+        if dry_run:
+            return None
+        lines = []
+        for key in ('prefix', 'lib', 'headers', 'scripts', 'data'):
+            path = paths[key]
+            if os.path.isdir(paths[key]):
+                lines.append('%s=%s' % (key,  path))
+        for ns in paths.get('namespace', ()):
+            lines.append('namespace=%s' % ns)
+
+        with codecs.open(shared_path, 'w', encoding='utf-8') as f:
+            f.write('\n'.join(lines))
+        return shared_path
+
+    def get_distinfo_resource(self, path):
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+        finder = resources.finder_for_path(self.path)
+        if finder is None:
+            raise DistlibException('Unable to get a finder for %s' % self.path)
+        return finder.find(path)
+
+    def get_distinfo_file(self, path):
+        """
+        Returns a path located under the ``.dist-info`` directory. Returns a
+        string representing the path.
+
+        :parameter path: a ``'/'``-separated path relative to the
+                         ``.dist-info`` directory or an absolute path;
+                         If *path* is an absolute path and doesn't start
+                         with the ``.dist-info`` directory path,
+                         a :class:`DistlibException` is raised
+        :type path: str
+        :rtype: str
+        """
+        # Check if it is an absolute path  # XXX use relpath, add tests
+        if path.find(os.sep) >= 0:
+            # it's an absolute path?
+            distinfo_dirname, path = path.split(os.sep)[-2:]
+            if distinfo_dirname != self.path.split(os.sep)[-1]:
+                raise DistlibException(
+                    'dist-info file %r does not belong to the %r %s '
+                    'distribution' % (path, self.name, self.version))
+
+        # The file must be relative
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+
+        return os.path.join(self.path, path)
+
+    def list_distinfo_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns paths for each line if
+        the path is pointing to a file located in the ``.dist-info`` directory
+        or one of its subdirectories.
+
+        :returns: iterator of paths
+        """
+        base = os.path.dirname(self.path)
+        for path, checksum, size in self._get_records():
+            # XXX add separator or use real relpath algo
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path.startswith(self.path):
+                yield path
+
+    def __eq__(self, other):
+        return (isinstance(other, InstalledDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+
+class EggInfoDistribution(BaseInstalledDistribution):
+    """Created with the *path* of the ``.egg-info`` directory or file provided
+    to the constructor. It reads the metadata contained in the file itself, or
+    if the given path happens to be a directory, the metadata is read from the
+    file ``PKG-INFO`` under that directory."""
+
+    requested = True    # as we have no way of knowing, assume it was
+    shared_locations = {}
+
+    def __init__(self, path, env=None):
+        def set_name_and_version(s, n, v):
+            s.name = n
+            s.key = n.lower()   # for case-insensitive comparisons
+            s.version = v
+
+        self.path = path
+        self.dist_path = env
+        if env and env._cache_enabled and path in env._cache_egg.path:
+            metadata = env._cache_egg.path[path].metadata
+            set_name_and_version(self, metadata.name, metadata.version)
+        else:
+            metadata = self._get_metadata(path)
+
+            # Need to be set before caching
+            set_name_and_version(self, metadata.name, metadata.version)
+
+            if env and env._cache_enabled:
+                env._cache_egg.add(self)
+        super(EggInfoDistribution, self).__init__(metadata, path, env)
+
+    def _get_metadata(self, path):
+        requires = None
+
+        def parse_requires_data(data):
+            """Create a list of dependencies from a requires.txt file.
+
+            *data*: the contents of a setuptools-produced requires.txt file.
+            """
+            reqs = []
+            lines = data.splitlines()
+            for line in lines:
+                line = line.strip()
+                if line.startswith('['):
+                    logger.warning('Unexpected line: quitting requirement scan: %r',
+                                   line)
+                    break
+                r = parse_requirement(line)
+                if not r:
+                    logger.warning('Not recognised as a requirement: %r', line)
+                    continue
+                if r.extras:
+                    logger.warning('extra requirements in requires.txt are '
+                                   'not supported')
+                if not r.constraints:
+                    reqs.append(r.name)
+                else:
+                    cons = ', '.join('%s%s' % c for c in r.constraints)
+                    reqs.append('%s (%s)' % (r.name, cons))
+            return reqs
+
+        def parse_requires_path(req_path):
+            """Create a list of dependencies from a requires.txt file.
+
+            *req_path*: the path to a setuptools-produced requires.txt file.
+            """
+
+            reqs = []
+            try:
+                with codecs.open(req_path, 'r', 'utf-8') as fp:
+                    reqs = parse_requires_data(fp.read())
+            except IOError:
+                pass
+            return reqs
+
+        tl_path = tl_data = None
+        if path.endswith('.egg'):
+            if os.path.isdir(path):
+                p = os.path.join(path, 'EGG-INFO')
+                meta_path = os.path.join(p, 'PKG-INFO')
+                metadata = Metadata(path=meta_path, scheme='legacy')
+                req_path = os.path.join(p, 'requires.txt')
+                tl_path = os.path.join(p, 'top_level.txt')
+                requires = parse_requires_path(req_path)
+            else:
+                # FIXME handle the case where zipfile is not available
+                zipf = zipimport.zipimporter(path)
+                fileobj = StringIO(
+                    zipf.get_data('EGG-INFO/PKG-INFO').decode('utf8'))
+                metadata = Metadata(fileobj=fileobj, scheme='legacy')
+                try:
+                    data = zipf.get_data('EGG-INFO/requires.txt')
+                    tl_data = zipf.get_data('EGG-INFO/top_level.txt').decode('utf-8')
+                    requires = parse_requires_data(data.decode('utf-8'))
+                except IOError:
+                    requires = None
+        elif path.endswith('.egg-info'):
+            if os.path.isdir(path):
+                req_path = os.path.join(path, 'requires.txt')
+                requires = parse_requires_path(req_path)
+                path = os.path.join(path, 'PKG-INFO')
+                tl_path = os.path.join(path, 'top_level.txt')
+            metadata = Metadata(path=path, scheme='legacy')
+        else:
+            raise DistlibException('path must end with .egg-info or .egg, '
+                                   'got %r' % path)
+
+        if requires:
+            metadata.add_requirements(requires)
+        # look for top-level modules in top_level.txt, if present
+        if tl_data is None:
+            if tl_path is not None and os.path.exists(tl_path):
+                with open(tl_path, 'rb') as f:
+                    tl_data = f.read().decode('utf-8')
+        if not tl_data:
+            tl_data = []
+        else:
+            tl_data = tl_data.splitlines()
+        self.modules = tl_data
+        return metadata
+
+    def __repr__(self):
+        return '<EggInfoDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            for path, _, _ in self.list_installed_files():
+                if path == record_path:
+                    continue
+                if not os.path.exists(path):
+                    mismatches.append((path, 'exists', True, False))
+        return mismatches
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: a list of (path, hash, size)
+        """
+
+        def _md5(path):
+            f = open(path, 'rb')
+            try:
+                content = f.read()
+            finally:
+                f.close()
+            return hashlib.md5(content).hexdigest()
+
+        def _size(path):
+            return os.stat(path).st_size
+
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        result = []
+        if os.path.exists(record_path):
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    p = os.path.normpath(os.path.join(self.path, line))
+                    # "./" is present as a marker between installed files
+                    # and installation metadata files
+                    if not os.path.exists(p):
+                        logger.warning('Non-existent file: %s', p)
+                        if p.endswith(('.pyc', '.pyo')):
+                            continue
+                        #otherwise fall through and fail
+                    if not os.path.isdir(p):
+                        result.append((p, _md5(p), _size(p)))
+            result.append((record_path, None, None))
+        return result
+
+    def list_distinfo_files(self, absolute=False):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns paths for
+        each line if the path is pointing to a file located in the
+        ``.egg-info`` directory or one of its subdirectories.
+
+        :parameter absolute: If *absolute* is ``True``, each returned path is
+                          transformed into a local absolute path. Otherwise the
+                          raw value from ``installed-files.txt`` is returned.
+        :type absolute: boolean
+        :returns: iterator of paths
+        """
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            skip = True
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    if line == './':
+                        skip = False
+                        continue
+                    if not skip:
+                        p = os.path.normpath(os.path.join(self.path, line))
+                        if p.startswith(self.path):
+                            if absolute:
+                                yield p
+                            else:
+                                yield line
+
+    def __eq__(self, other):
+        return (isinstance(other, EggInfoDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+new_dist_class = InstalledDistribution
+old_dist_class = EggInfoDistribution
+
+
+class DependencyGraph(object):
+    """
+    Represents a dependency graph between distributions.
+
+    The dependency relationships are stored in an ``adjacency_list`` that maps
+    distributions to a list of ``(other, label)`` tuples where  ``other``
+    is a distribution and the edge is labeled with ``label`` (i.e. the version
+    specifier, if such was provided). Also, for more efficient traversal, for
+    every distribution ``x``, a list of predecessors is kept in
+    ``reverse_list[x]``. An edge from distribution ``a`` to
+    distribution ``b`` means that ``a`` depends on ``b``. If any missing
+    dependencies are found, they are stored in ``missing``, which is a
+    dictionary that maps distributions to a list of requirements that were not
+    provided by any other distributions.
+    """
+
+    def __init__(self):
+        self.adjacency_list = {}
+        self.reverse_list = {}
+        self.missing = {}
+
+    def add_distribution(self, distribution):
+        """Add the *distribution* to the graph.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        """
+        self.adjacency_list[distribution] = []
+        self.reverse_list[distribution] = []
+        #self.missing[distribution] = []
+
+    def add_edge(self, x, y, label=None):
+        """Add an edge from distribution *x* to distribution *y* with the given
+        *label*.
+
+        :type x: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type y: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type label: ``str`` or ``None``
+        """
+        self.adjacency_list[x].append((y, label))
+        # multiple edges are allowed, so be careful
+        if x not in self.reverse_list[y]:
+            self.reverse_list[y].append(x)
+
+    def add_missing(self, distribution, requirement):
+        """
+        Add a missing *requirement* for the given *distribution*.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        :type requirement: ``str``
+        """
+        logger.debug('%s missing %r', distribution, requirement)
+        self.missing.setdefault(distribution, []).append(requirement)
+
+    def _repr_dist(self, dist):
+        return '%s %s' % (dist.name, dist.version)
+
+    def repr_node(self, dist, level=1):
+        """Prints only a subgraph"""
+        output = [self._repr_dist(dist)]
+        for other, label in self.adjacency_list[dist]:
+            dist = self._repr_dist(other)
+            if label is not None:
+                dist = '%s [%s]' % (dist, label)
+            output.append('    ' * level + str(dist))
+            suboutput = self.repr_node(other, level + 1)
+            subs = suboutput.split('\n')
+            output.extend(subs[1:])
+        return '\n'.join(output)
+
+    def to_dot(self, f, skip_disconnected=True):
+        """Writes a DOT output for the graph to the provided file *f*.
+
+        If *skip_disconnected* is set to ``True``, then all distributions
+        that are not dependent on any other distribution are skipped.
+
+        :type f: has to support ``file``-like operations
+        :type skip_disconnected: ``bool``
+        """
+        disconnected = []
+
+        f.write("digraph dependencies {\n")
+        for dist, adjs in self.adjacency_list.items():
+            if len(adjs) == 0 and not skip_disconnected:
+                disconnected.append(dist)
+            for other, label in adjs:
+                if not label is None:
+                    f.write('"%s" -> "%s" [label="%s"]\n' %
+                            (dist.name, other.name, label))
+                else:
+                    f.write('"%s" -> "%s"\n' % (dist.name, other.name))
+        if not skip_disconnected and len(disconnected) > 0:
+            f.write('subgraph disconnected {\n')
+            f.write('label = "Disconnected"\n')
+            f.write('bgcolor = red\n')
+
+            for dist in disconnected:
+                f.write('"%s"' % dist.name)
+                f.write('\n')
+            f.write('}\n')
+        f.write('}\n')
+
+    def topological_sort(self):
+        """
+        Perform a topological sort of the graph.
+        :return: A tuple, the first element of which is a topologically sorted
+                 list of distributions, and the second element of which is a
+                 list of distributions that cannot be sorted because they have
+                 circular dependencies and so form a cycle.
+        """
+        result = []
+        # Make a shallow copy of the adjacency list
+        alist = {}
+        for k, v in self.adjacency_list.items():
+            alist[k] = v[:]
+        while True:
+            # See what we can remove in this run
+            to_remove = []
+            for k, v in list(alist.items())[:]:
+                if not v:
+                    to_remove.append(k)
+                    del alist[k]
+            if not to_remove:
+                # What's left in alist (if anything) is a cycle.
+                break
+            # Remove from the adjacency list of others
+            for k, v in alist.items():
+                alist[k] = [(d, r) for d, r in v if d not in to_remove]
+            logger.debug('Moving to result: %s',
+                         ['%s (%s)' % (d.name, d.version) for d in to_remove])
+            result.extend(to_remove)
+        return result, list(alist.keys())
+
+    def __repr__(self):
+        """Representation of the graph"""
+        output = []
+        for dist, adjs in self.adjacency_list.items():
+            output.append(self.repr_node(dist))
+        return '\n'.join(output)
+
+
+def make_graph(dists, scheme='default'):
+    """Makes a dependency graph from the given distributions.
+
+    :parameter dists: a list of distributions
+    :type dists: list of :class:`distutils2.database.InstalledDistribution` and
+                 :class:`distutils2.database.EggInfoDistribution` instances
+    :rtype: a :class:`DependencyGraph` instance
+    """
+    scheme = get_scheme(scheme)
+    graph = DependencyGraph()
+    provided = {}  # maps names to lists of (version, dist) tuples
+
+    # first, build the graph and find out what's provided
+    for dist in dists:
+        graph.add_distribution(dist)
+
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            provided.setdefault(name, []).append((version, dist))
+
+    # now make the edges
+    for dist in dists:
+        requires = (dist.run_requires | dist.meta_requires |
+                    dist.build_requires | dist.dev_requires)
+        for req in requires:
+            try:
+                matcher = scheme.matcher(req)
+            except UnsupportedVersionError:
+                # XXX compat-mode if cannot read the version
+                logger.warning('could not read version %r - using name only',
+                               req)
+                name = req.split()[0]
+                matcher = scheme.matcher(name)
+
+            name = matcher.key   # case-insensitive
+
+            matched = False
+            if name in provided:
+                for version, provider in provided[name]:
+                    try:
+                        match = matcher.match(version)
+                    except UnsupportedVersionError:
+                        match = False
+
+                    if match:
+                        graph.add_edge(dist, provider, req)
+                        matched = True
+                        break
+            if not matched:
+                graph.add_missing(dist, req)
+    return graph
+
+
+def get_dependent_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    dependent on *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    dep = [dist]  # dependent distributions
+    todo = graph.reverse_list[dist]  # list of nodes we should inspect
+
+    while todo:
+        d = todo.pop()
+        dep.append(d)
+        for succ in graph.reverse_list[d]:
+            if succ not in dep:
+                todo.append(succ)
+
+    dep.pop(0)  # remove dist from dep, was there to prevent infinite loops
+    return dep
+
+
+def get_required_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    required by *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    req = []  # required distributions
+    todo = graph.adjacency_list[dist]  # list of nodes we should inspect
+
+    while todo:
+        d = todo.pop()[0]
+        req.append(d)
+        for pred in graph.adjacency_list[d]:
+            if pred not in req:
+                todo.append(pred)
+
+    return req
+
+
+def make_dist(name, version, **kwargs):
+    """
+    A convenience method for making a dist given just a name and version.
+    """
+    summary = kwargs.pop('summary', 'Placeholder for summary')
+    md = Metadata(**kwargs)
+    md.name = name
+    md.version = version
+    md.summary = summary or 'Placeholder for summary'
+    return Distribution(md)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/index.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/index.py
new file mode 100644
index 00000000..7a87cdcf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/index.py
@@ -0,0 +1,516 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import hashlib
+import logging
+import os
+import shutil
+import subprocess
+import tempfile
+try:
+    from threading import Thread
+except ImportError:
+    from dummy_threading import Thread
+
+from . import DistlibException
+from .compat import (HTTPBasicAuthHandler, Request, HTTPPasswordMgr,
+                     urlparse, build_opener, string_types)
+from .util import cached_property, zip_dir, ServerProxy
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+DEFAULT_REALM = 'pypi'
+
+class PackageIndex(object):
+    """
+    This class represents a package index compatible with PyPI, the Python
+    Package Index.
+    """
+
+    boundary = b'----------ThIs_Is_tHe_distlib_index_bouNdaRY_$'
+
+    def __init__(self, url=None):
+        """
+        Initialise an instance.
+
+        :param url: The URL of the index. If not specified, the URL for PyPI is
+                    used.
+        """
+        self.url = url or DEFAULT_INDEX
+        self.read_configuration()
+        scheme, netloc, path, params, query, frag = urlparse(self.url)
+        if params or query or frag or scheme not in ('http', 'https'):
+            raise DistlibException('invalid repository: %s' % self.url)
+        self.password_handler = None
+        self.ssl_verifier = None
+        self.gpg = None
+        self.gpg_home = None
+        with open(os.devnull, 'w') as sink:
+            # Use gpg by default rather than gpg2, as gpg2 insists on
+            # prompting for passwords
+            for s in ('gpg', 'gpg2'):
+                try:
+                    rc = subprocess.check_call([s, '--version'], stdout=sink,
+                                               stderr=sink)
+                    if rc == 0:
+                        self.gpg = s
+                        break
+                except OSError:
+                    pass
+
+    def _get_pypirc_command(self):
+        """
+        Get the distutils command for interacting with PyPI configurations.
+        :return: the command.
+        """
+        from distutils.core import Distribution
+        from distutils.config import PyPIRCCommand
+        d = Distribution()
+        return PyPIRCCommand(d)
+
+    def read_configuration(self):
+        """
+        Read the PyPI access configuration as supported by distutils, getting
+        PyPI to do the actual work. This populates ``username``, ``password``,
+        ``realm`` and ``url`` attributes from the configuration.
+        """
+        # get distutils to do the work
+        c = self._get_pypirc_command()
+        c.repository = self.url
+        cfg = c._read_pypirc()
+        self.username = cfg.get('username')
+        self.password = cfg.get('password')
+        self.realm = cfg.get('realm', 'pypi')
+        self.url = cfg.get('repository', self.url)
+
+    def save_configuration(self):
+        """
+        Save the PyPI access configuration. You must have set ``username`` and
+        ``password`` attributes before calling this method.
+
+        Again, distutils is used to do the actual work.
+        """
+        self.check_credentials()
+        # get distutils to do the work
+        c = self._get_pypirc_command()
+        c._store_pypirc(self.username, self.password)
+
+    def check_credentials(self):
+        """
+        Check that ``username`` and ``password`` have been set, and raise an
+        exception if not.
+        """
+        if self.username is None or self.password is None:
+            raise DistlibException('username and password must be set')
+        pm = HTTPPasswordMgr()
+        _, netloc, _, _, _, _ = urlparse(self.url)
+        pm.add_password(self.realm, netloc, self.username, self.password)
+        self.password_handler = HTTPBasicAuthHandler(pm)
+
+    def register(self, metadata):
+        """
+        Register a distribution on PyPI, using the provided metadata.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the distribution to be
+                         registered.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        metadata.validate()
+        d = metadata.todict()
+        d[':action'] = 'verify'
+        request = self.encode_request(d.items(), [])
+        response = self.send_request(request)
+        d[':action'] = 'submit'
+        request = self.encode_request(d.items(), [])
+        return self.send_request(request)
+
+    def _reader(self, name, stream, outbuf):
+        """
+        Thread runner for reading lines of from a subprocess into a buffer.
+
+        :param name: The logical name of the stream (used for logging only).
+        :param stream: The stream to read from. This will typically a pipe
+                       connected to the output stream of a subprocess.
+        :param outbuf: The list to append the read lines to.
+        """
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            s = s.decode('utf-8').rstrip()
+            outbuf.append(s)
+            logger.debug('%s: %s' % (name, s))
+        stream.close()
+
+    def get_sign_command(self, filename, signer, sign_password,
+                         keystore=None):
+        """
+        Return a suitable command for signing a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The signing command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        if sign_password is not None:
+            cmd.extend(['--batch', '--passphrase-fd', '0'])
+        td = tempfile.mkdtemp()
+        sf = os.path.join(td, os.path.basename(filename) + '.asc')
+        cmd.extend(['--detach-sign', '--armor', '--local-user',
+                    signer, '--output', sf, filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd, sf
+
+    def run_command(self, cmd, input_data=None):
+        """
+        Run a command in a child process , passing it any input data specified.
+
+        :param cmd: The command to run.
+        :param input_data: If specified, this must be a byte string containing
+                           data to be sent to the child process.
+        :return: A tuple consisting of the subprocess' exit code, a list of
+                 lines read from the subprocess' ``stdout``, and a list of
+                 lines read from the subprocess' ``stderr``.
+        """
+        kwargs = {
+            'stdout': subprocess.PIPE,
+            'stderr': subprocess.PIPE,
+        }
+        if input_data is not None:
+            kwargs['stdin'] = subprocess.PIPE
+        stdout = []
+        stderr = []
+        p = subprocess.Popen(cmd, **kwargs)
+        # We don't use communicate() here because we may need to
+        # get clever with interacting with the command
+        t1 = Thread(target=self._reader, args=('stdout', p.stdout, stdout))
+        t1.start()
+        t2 = Thread(target=self._reader, args=('stderr', p.stderr, stderr))
+        t2.start()
+        if input_data is not None:
+            p.stdin.write(input_data)
+            p.stdin.close()
+
+        p.wait()
+        t1.join()
+        t2.join()
+        return p.returncode, stdout, stderr
+
+    def sign_file(self, filename, signer, sign_password, keystore=None):
+        """
+        Sign a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The absolute pathname of the file where the signature is
+                 stored.
+        """
+        cmd, sig_file = self.get_sign_command(filename, signer, sign_password,
+                                              keystore)
+        rc, stdout, stderr = self.run_command(cmd,
+                                              sign_password.encode('utf-8'))
+        if rc != 0:
+            raise DistlibException('sign command failed with error '
+                                   'code %s' % rc)
+        return sig_file
+
+    def upload_file(self, metadata, filename, signer=None, sign_password=None,
+                    filetype='sdist', pyversion='source', keystore=None):
+        """
+        Upload a release file to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the file to be uploaded.
+        :param filename: The pathname of the file to be uploaded.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param filetype: The type of the file being uploaded. This is the
+                        distutils command which produced that file, e.g.
+                        ``sdist`` or ``bdist_wheel``.
+        :param pyversion: The version of Python which the release relates
+                          to. For code compatible with any Python, this would
+                          be ``source``, otherwise it would be e.g. ``3.2``.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.exists(filename):
+            raise DistlibException('not found: %s' % filename)
+        metadata.validate()
+        d = metadata.todict()
+        sig_file = None
+        if signer:
+            if not self.gpg:
+                logger.warning('no signing program available - not signed')
+            else:
+                sig_file = self.sign_file(filename, signer, sign_password,
+                                          keystore)
+        with open(filename, 'rb') as f:
+            file_data = f.read()
+        md5_digest = hashlib.md5(file_data).hexdigest()
+        sha256_digest = hashlib.sha256(file_data).hexdigest()
+        d.update({
+            ':action': 'file_upload',
+            'protocol_version': '1',
+            'filetype': filetype,
+            'pyversion': pyversion,
+            'md5_digest': md5_digest,
+            'sha256_digest': sha256_digest,
+        })
+        files = [('content', os.path.basename(filename), file_data)]
+        if sig_file:
+            with open(sig_file, 'rb') as f:
+                sig_data = f.read()
+            files.append(('gpg_signature', os.path.basename(sig_file),
+                         sig_data))
+            shutil.rmtree(os.path.dirname(sig_file))
+        request = self.encode_request(d.items(), files)
+        return self.send_request(request)
+
+    def upload_documentation(self, metadata, doc_dir):
+        """
+        Upload documentation to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the documentation to be
+                         uploaded.
+        :param doc_dir: The pathname of the directory which contains the
+                        documentation. This should be the directory that
+                        contains the ``index.html`` for the documentation.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.isdir(doc_dir):
+            raise DistlibException('not a directory: %r' % doc_dir)
+        fn = os.path.join(doc_dir, 'index.html')
+        if not os.path.exists(fn):
+            raise DistlibException('not found: %r' % fn)
+        metadata.validate()
+        name, version = metadata.name, metadata.version
+        zip_data = zip_dir(doc_dir).getvalue()
+        fields = [(':action', 'doc_upload'),
+                  ('name', name), ('version', version)]
+        files = [('content', name, zip_data)]
+        request = self.encode_request(fields, files)
+        return self.send_request(request)
+
+    def get_verify_command(self, signature_filename, data_filename,
+                           keystore=None):
+        """
+        Return a suitable command for verifying a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The verifying command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        cmd.extend(['--verify', signature_filename, data_filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd
+
+    def verify_signature(self, signature_filename, data_filename,
+                         keystore=None):
+        """
+        Verify a signature for a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: True if the signature was verified, else False.
+        """
+        if not self.gpg:
+            raise DistlibException('verification unavailable because gpg '
+                                   'unavailable')
+        cmd = self.get_verify_command(signature_filename, data_filename,
+                                      keystore)
+        rc, stdout, stderr = self.run_command(cmd)
+        if rc not in (0, 1):
+            raise DistlibException('verify command failed with error '
+                             'code %s' % rc)
+        return rc == 0
+
+    def download_file(self, url, destfile, digest=None, reporthook=None):
+        """
+        This is a convenience method for downloading a file from an URL.
+        Normally, this will be a file from the index, though currently
+        no check is made for this (i.e. a file can be downloaded from
+        anywhere).
+
+        The method is just like the :func:`urlretrieve` function in the
+        standard library, except that it allows digest computation to be
+        done during download and checking that the downloaded data
+        matched any expected value.
+
+        :param url: The URL of the file to be downloaded (assumed to be
+                    available via an HTTP GET request).
+        :param destfile: The pathname where the downloaded file is to be
+                         saved.
+        :param digest: If specified, this must be a (hasher, value)
+                       tuple, where hasher is the algorithm used (e.g.
+                       ``'md5'``) and ``value`` is the expected value.
+        :param reporthook: The same as for :func:`urlretrieve` in the
+                           standard library.
+        """
+        if digest is None:
+            digester = None
+            logger.debug('No digest specified')
+        else:
+            if isinstance(digest, (list, tuple)):
+                hasher, digest = digest
+            else:
+                hasher = 'md5'
+            digester = getattr(hashlib, hasher)()
+            logger.debug('Digest specified: %s' % digest)
+        # The following code is equivalent to urlretrieve.
+        # We need to do it this way so that we can compute the
+        # digest of the file as we go.
+        with open(destfile, 'wb') as dfp:
+            # addinfourl is not a context manager on 2.x
+            # so we have to use try/finally
+            sfp = self.send_request(Request(url))
+            try:
+                headers = sfp.info()
+                blocksize = 8192
+                size = -1
+                read = 0
+                blocknum = 0
+                if "content-length" in headers:
+                    size = int(headers["Content-Length"])
+                if reporthook:
+                    reporthook(blocknum, blocksize, size)
+                while True:
+                    block = sfp.read(blocksize)
+                    if not block:
+                        break
+                    read += len(block)
+                    dfp.write(block)
+                    if digester:
+                        digester.update(block)
+                    blocknum += 1
+                    if reporthook:
+                        reporthook(blocknum, blocksize, size)
+            finally:
+                sfp.close()
+
+        # check that we got the whole file, if we can
+        if size >= 0 and read < size:
+            raise DistlibException(
+                'retrieval incomplete: got only %d out of %d bytes'
+                % (read, size))
+        # if we have a digest, it must match.
+        if digester:
+            actual = digester.hexdigest()
+            if digest != actual:
+                raise DistlibException('%s digest mismatch for %s: expected '
+                                       '%s, got %s' % (hasher, destfile,
+                                                       digest, actual))
+            logger.debug('Digest verified: %s', digest)
+
+    def send_request(self, req):
+        """
+        Send a standard library :class:`Request` to PyPI and return its
+        response.
+
+        :param req: The request to send.
+        :return: The HTTP response from PyPI (a standard library HTTPResponse).
+        """
+        handlers = []
+        if self.password_handler:
+            handlers.append(self.password_handler)
+        if self.ssl_verifier:
+            handlers.append(self.ssl_verifier)
+        opener = build_opener(*handlers)
+        return opener.open(req)
+
+    def encode_request(self, fields, files):
+        """
+        Encode fields and files for posting to an HTTP server.
+
+        :param fields: The fields to send as a list of (fieldname, value)
+                       tuples.
+        :param files: The files to send as a list of (fieldname, filename,
+                      file_bytes) tuple.
+        """
+        # Adapted from packaging, which in turn was adapted from
+        # http://code.activestate.com/recipes/146306
+
+        parts = []
+        boundary = self.boundary
+        for k, values in fields:
+            if not isinstance(values, (list, tuple)):
+                values = [values]
+
+            for v in values:
+                parts.extend((
+                    b'--' + boundary,
+                    ('Content-Disposition: form-data; name="%s"' %
+                     k).encode('utf-8'),
+                    b'',
+                    v.encode('utf-8')))
+        for key, filename, value in files:
+            parts.extend((
+                b'--' + boundary,
+                ('Content-Disposition: form-data; name="%s"; filename="%s"' %
+                 (key, filename)).encode('utf-8'),
+                b'',
+                value))
+
+        parts.extend((b'--' + boundary + b'--', b''))
+
+        body = b'\r\n'.join(parts)
+        ct = b'multipart/form-data; boundary=' + boundary
+        headers = {
+            'Content-type': ct,
+            'Content-length': str(len(body))
+        }
+        return Request(self.url, body, headers)
+
+    def search(self, terms, operator=None):
+        if isinstance(terms, string_types):
+            terms = {'name': terms}
+        rpc_proxy = ServerProxy(self.url, timeout=3.0)
+        try:
+            return rpc_proxy.search(terms, operator or 'and')
+        finally:
+            rpc_proxy('close')()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/locators.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/locators.py
new file mode 100644
index 00000000..a7ed9469
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/locators.py
@@ -0,0 +1,1295 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+
+import gzip
+from io import BytesIO
+import json
+import logging
+import os
+import posixpath
+import re
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import zlib
+
+from . import DistlibException
+from .compat import (urljoin, urlparse, urlunparse, url2pathname, pathname2url,
+                     queue, quote, unescape, string_types, build_opener,
+                     HTTPRedirectHandler as BaseRedirectHandler, text_type,
+                     Request, HTTPError, URLError)
+from .database import Distribution, DistributionPath, make_dist
+from .metadata import Metadata, MetadataInvalidError
+from .util import (cached_property, parse_credentials, ensure_slash,
+                   split_filename, get_project_data, parse_requirement,
+                   parse_name_and_version, ServerProxy, normalize_name)
+from .version import get_scheme, UnsupportedVersionError
+from .wheel import Wheel, is_compatible
+
+logger = logging.getLogger(__name__)
+
+HASHER_HASH = re.compile(r'^(\w+)=([a-f0-9]+)')
+CHARSET = re.compile(r';\s*charset\s*=\s*(.*)\s*$', re.I)
+HTML_CONTENT_TYPE = re.compile('text/html|application/x(ht)?ml')
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+
+def get_all_distribution_names(url=None):
+    """
+    Return all distribution names known by an index.
+    :param url: The URL of the index.
+    :return: A list of all known distribution names.
+    """
+    if url is None:
+        url = DEFAULT_INDEX
+    client = ServerProxy(url, timeout=3.0)
+    try:
+        return client.list_packages()
+    finally:
+        client('close')()
+
+class RedirectHandler(BaseRedirectHandler):
+    """
+    A class to work around a bug in some Python 3.2.x releases.
+    """
+    # There's a bug in the base version for some 3.2.x
+    # (e.g. 3.2.2 on Ubuntu Oneiric). If a Location header
+    # returns e.g. /abc, it bails because it says the scheme ''
+    # is bogus, when actually it should use the request's
+    # URL for the scheme. See Python issue #13696.
+    def http_error_302(self, req, fp, code, msg, headers):
+        # Some servers (incorrectly) return multiple Location headers
+        # (so probably same goes for URI).  Use first header.
+        newurl = None
+        for key in ('location', 'uri'):
+            if key in headers:
+                newurl = headers[key]
+                break
+        if newurl is None:  # pragma: no cover
+            return
+        urlparts = urlparse(newurl)
+        if urlparts.scheme == '':
+            newurl = urljoin(req.get_full_url(), newurl)
+            if hasattr(headers, 'replace_header'):
+                headers.replace_header(key, newurl)
+            else:
+                headers[key] = newurl
+        return BaseRedirectHandler.http_error_302(self, req, fp, code, msg,
+                                                  headers)
+
+    http_error_301 = http_error_303 = http_error_307 = http_error_302
+
+class Locator(object):
+    """
+    A base class for locators - things that locate distributions.
+    """
+    source_extensions = ('.tar.gz', '.tar.bz2', '.tar', '.zip', '.tgz', '.tbz')
+    binary_extensions = ('.egg', '.exe', '.whl')
+    excluded_extensions = ('.pdf',)
+
+    # A list of tags indicating which wheels you want to match. The default
+    # value of None matches against the tags compatible with the running
+    # Python. If you want to match other values, set wheel_tags on a locator
+    # instance to a list of tuples (pyver, abi, arch) which you want to match.
+    wheel_tags = None
+
+    downloadable_extensions = source_extensions + ('.whl',)
+
+    def __init__(self, scheme='default'):
+        """
+        Initialise an instance.
+        :param scheme: Because locators look for most recent versions, they
+                       need to know the version scheme to use. This specifies
+                       the current PEP-recommended scheme - use ``'legacy'``
+                       if you need to support existing distributions on PyPI.
+        """
+        self._cache = {}
+        self.scheme = scheme
+        # Because of bugs in some of the handlers on some of the platforms,
+        # we use our own opener rather than just using urlopen.
+        self.opener = build_opener(RedirectHandler())
+        # If get_project() is called from locate(), the matcher instance
+        # is set from the requirement passed to locate(). See issue #18 for
+        # why this can be useful to know.
+        self.matcher = None
+        self.errors = queue.Queue()
+
+    def get_errors(self):
+        """
+        Return any errors which have occurred.
+        """
+        result = []
+        while not self.errors.empty():  # pragma: no cover
+            try:
+                e = self.errors.get(False)
+                result.append(e)
+            except self.errors.Empty:
+                continue
+            self.errors.task_done()
+        return result
+
+    def clear_errors(self):
+        """
+        Clear any errors which may have been logged.
+        """
+        # Just get the errors and throw them away
+        self.get_errors()
+
+    def clear_cache(self):
+        self._cache.clear()
+
+    def _get_scheme(self):
+        return self._scheme
+
+    def _set_scheme(self, value):
+        self._scheme = value
+
+    scheme = property(_get_scheme, _set_scheme)
+
+    def _get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This should be implemented in subclasses.
+
+        If called from a locate() request, self.matcher will be set to a
+        matcher for the requirement to satisfy, otherwise it will be None.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This calls _get_project to do all the work, and just implements a caching layer on top.
+        """
+        if self._cache is None:  # pragma: no cover
+            result = self._get_project(name)
+        elif name in self._cache:
+            result = self._cache[name]
+        else:
+            self.clear_errors()
+            result = self._get_project(name)
+            self._cache[name] = result
+        return result
+
+    def score_url(self, url):
+        """
+        Give an url a score which can be used to choose preferred URLs
+        for a given project release.
+        """
+        t = urlparse(url)
+        basename = posixpath.basename(t.path)
+        compatible = True
+        is_wheel = basename.endswith('.whl')
+        is_downloadable = basename.endswith(self.downloadable_extensions)
+        if is_wheel:
+            compatible = is_compatible(Wheel(basename), self.wheel_tags)
+        return (t.scheme == 'https', 'pypi.org' in t.netloc,
+                is_downloadable, is_wheel, compatible, basename)
+
+    def prefer_url(self, url1, url2):
+        """
+        Choose one of two URLs where both are candidates for distribution
+        archives for the same version of a distribution (for example,
+        .tar.gz vs. zip).
+
+        The current implementation favours https:// URLs over http://, archives
+        from PyPI over those from other locations, wheel compatibility (if a
+        wheel) and then the archive name.
+        """
+        result = url2
+        if url1:
+            s1 = self.score_url(url1)
+            s2 = self.score_url(url2)
+            if s1 > s2:
+                result = url1
+            if result != url2:
+                logger.debug('Not replacing %r with %r', url1, url2)
+            else:
+                logger.debug('Replacing %r with %r', url1, url2)
+        return result
+
+    def split_filename(self, filename, project_name):
+        """
+        Attempt to split a filename in project name, version and Python version.
+        """
+        return split_filename(filename, project_name)
+
+    def convert_url_to_download_info(self, url, project_name):
+        """
+        See if a URL is a candidate for a download URL for a project (the URL
+        has typically been scraped from an HTML page).
+
+        If it is, a dictionary is returned with keys "name", "version",
+        "filename" and "url"; otherwise, None is returned.
+        """
+        def same_project(name1, name2):
+            return normalize_name(name1) == normalize_name(name2)
+
+        result = None
+        scheme, netloc, path, params, query, frag = urlparse(url)
+        if frag.lower().startswith('egg='):  # pragma: no cover
+            logger.debug('%s: version hint in fragment: %r',
+                         project_name, frag)
+        m = HASHER_HASH.match(frag)
+        if m:
+            algo, digest = m.groups()
+        else:
+            algo, digest = None, None
+        origpath = path
+        if path and path[-1] == '/':  # pragma: no cover
+            path = path[:-1]
+        if path.endswith('.whl'):
+            try:
+                wheel = Wheel(path)
+                if not is_compatible(wheel, self.wheel_tags):
+                    logger.debug('Wheel not compatible: %s', path)
+                else:
+                    if project_name is None:
+                        include = True
+                    else:
+                        include = same_project(wheel.name, project_name)
+                    if include:
+                        result = {
+                            'name': wheel.name,
+                            'version': wheel.version,
+                            'filename': wheel.filename,
+                            'url': urlunparse((scheme, netloc, origpath,
+                                               params, query, '')),
+                            'python-version': ', '.join(
+                                ['.'.join(list(v[2:])) for v in wheel.pyver]),
+                        }
+            except Exception as e:  # pragma: no cover
+                logger.warning('invalid path for wheel: %s', path)
+        elif not path.endswith(self.downloadable_extensions):  # pragma: no cover
+            logger.debug('Not downloadable: %s', path)
+        else:  # downloadable extension
+            path = filename = posixpath.basename(path)
+            for ext in self.downloadable_extensions:
+                if path.endswith(ext):
+                    path = path[:-len(ext)]
+                    t = self.split_filename(path, project_name)
+                    if not t:  # pragma: no cover
+                        logger.debug('No match for project/version: %s', path)
+                    else:
+                        name, version, pyver = t
+                        if not project_name or same_project(project_name, name):
+                            result = {
+                                'name': name,
+                                'version': version,
+                                'filename': filename,
+                                'url': urlunparse((scheme, netloc, origpath,
+                                                   params, query, '')),
+                                #'packagetype': 'sdist',
+                            }
+                            if pyver:  # pragma: no cover
+                                result['python-version'] = pyver
+                    break
+        if result and algo:
+            result['%s_digest' % algo] = digest
+        return result
+
+    def _get_digest(self, info):
+        """
+        Get a digest from a dictionary by looking at keys of the form
+        'algo_digest'.
+
+        Returns a 2-tuple (algo, digest) if found, else None. Currently
+        looks only for SHA256, then MD5.
+        """
+        result = None
+        for algo in ('sha256', 'md5'):
+            key = '%s_digest' % algo
+            if key in info:
+                result = (algo, info[key])
+                break
+        return result
+
+    def _update_version_data(self, result, info):
+        """
+        Update a result dictionary (the final result from _get_project) with a
+        dictionary for a specific version, which typically holds information
+        gleaned from a filename or URL for an archive for the distribution.
+        """
+        name = info.pop('name')
+        version = info.pop('version')
+        if version in result:
+            dist = result[version]
+            md = dist.metadata
+        else:
+            dist = make_dist(name, version, scheme=self.scheme)
+            md = dist.metadata
+        dist.digest = digest = self._get_digest(info)
+        url = info['url']
+        result['digests'][url] = digest
+        if md.source_url != info['url']:
+            md.source_url = self.prefer_url(md.source_url, url)
+            result['urls'].setdefault(version, set()).add(url)
+        dist.locator = self
+        result[version] = dist
+
+    def locate(self, requirement, prereleases=False):
+        """
+        Find the most recent distribution which matches the given
+        requirement.
+
+        :param requirement: A requirement of the form 'foo (1.0)' or perhaps
+                            'foo (>= 1.0, < 2.0, != 1.3)'
+        :param prereleases: If ``True``, allow pre-release versions
+                            to be located. Otherwise, pre-release versions
+                            are not returned.
+        :return: A :class:`Distribution` instance, or ``None`` if no such
+                 distribution could be located.
+        """
+        result = None
+        r = parse_requirement(requirement)
+        if r is None:  # pragma: no cover
+            raise DistlibException('Not a valid requirement: %r' % requirement)
+        scheme = get_scheme(self.scheme)
+        self.matcher = matcher = scheme.matcher(r.requirement)
+        logger.debug('matcher: %s (%s)', matcher, type(matcher).__name__)
+        versions = self.get_project(r.name)
+        if len(versions) > 2:   # urls and digests keys are present
+            # sometimes, versions are invalid
+            slist = []
+            vcls = matcher.version_class
+            for k in versions:
+                if k in ('urls', 'digests'):
+                    continue
+                try:
+                    if not matcher.match(k):
+                        logger.debug('%s did not match %r', matcher, k)
+                    else:
+                        if prereleases or not vcls(k).is_prerelease:
+                            slist.append(k)
+                        else:
+                            logger.debug('skipping pre-release '
+                                         'version %s of %s', k, matcher.name)
+                except Exception:  # pragma: no cover
+                    logger.warning('error matching %s with %r', matcher, k)
+                    pass # slist.append(k)
+            if len(slist) > 1:
+                slist = sorted(slist, key=scheme.key)
+            if slist:
+                logger.debug('sorted list: %s', slist)
+                version = slist[-1]
+                result = versions[version]
+        if result:
+            if r.extras:
+                result.extras = r.extras
+            result.download_urls = versions.get('urls', {}).get(version, set())
+            d = {}
+            sd = versions.get('digests', {})
+            for url in result.download_urls:
+                if url in sd:  # pragma: no cover
+                    d[url] = sd[url]
+            result.digests = d
+        self.matcher = None
+        return result
+
+
+class PyPIRPCLocator(Locator):
+    """
+    This locator uses XML-RPC to locate distributions. It therefore
+    cannot be used with simple mirrors (that only mirror file content).
+    """
+    def __init__(self, url, **kwargs):
+        """
+        Initialise an instance.
+
+        :param url: The URL to use for XML-RPC.
+        :param kwargs: Passed to the superclass constructor.
+        """
+        super(PyPIRPCLocator, self).__init__(**kwargs)
+        self.base_url = url
+        self.client = ServerProxy(url, timeout=3.0)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        return set(self.client.list_packages())
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        versions = self.client.package_releases(name, True)
+        for v in versions:
+            urls = self.client.release_urls(name, v)
+            data = self.client.release_data(name, v)
+            metadata = Metadata(scheme=self.scheme)
+            metadata.name = data['name']
+            metadata.version = data['version']
+            metadata.license = data.get('license')
+            metadata.keywords = data.get('keywords', [])
+            metadata.summary = data.get('summary')
+            dist = Distribution(metadata)
+            if urls:
+                info = urls[0]
+                metadata.source_url = info['url']
+                dist.digest = self._get_digest(info)
+                dist.locator = self
+                result[v] = dist
+                for info in urls:
+                    url = info['url']
+                    digest = self._get_digest(info)
+                    result['urls'].setdefault(v, set()).add(url)
+                    result['digests'][url] = digest
+        return result
+
+class PyPIJSONLocator(Locator):
+    """
+    This locator uses PyPI's JSON interface. It's very limited in functionality
+    and probably not worth using.
+    """
+    def __init__(self, url, **kwargs):
+        super(PyPIJSONLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        url = urljoin(self.base_url, '%s/json' % quote(name))
+        try:
+            resp = self.opener.open(url)
+            data = resp.read().decode() # for now
+            d = json.loads(data)
+            md = Metadata(scheme=self.scheme)
+            data = d['info']
+            md.name = data['name']
+            md.version = data['version']
+            md.license = data.get('license')
+            md.keywords = data.get('keywords', [])
+            md.summary = data.get('summary')
+            dist = Distribution(md)
+            dist.locator = self
+            urls = d['urls']
+            result[md.version] = dist
+            for info in d['urls']:
+                url = info['url']
+                dist.download_urls.add(url)
+                dist.digests[url] = self._get_digest(info)
+                result['urls'].setdefault(md.version, set()).add(url)
+                result['digests'][url] = self._get_digest(info)
+            # Now get other releases
+            for version, infos in d['releases'].items():
+                if version == md.version:
+                    continue    # already done
+                omd = Metadata(scheme=self.scheme)
+                omd.name = md.name
+                omd.version = version
+                odist = Distribution(omd)
+                odist.locator = self
+                result[version] = odist
+                for info in infos:
+                    url = info['url']
+                    odist.download_urls.add(url)
+                    odist.digests[url] = self._get_digest(info)
+                    result['urls'].setdefault(version, set()).add(url)
+                    result['digests'][url] = self._get_digest(info)
+#            for info in urls:
+#                md.source_url = info['url']
+#                dist.digest = self._get_digest(info)
+#                dist.locator = self
+#                for info in urls:
+#                    url = info['url']
+#                    result['urls'].setdefault(md.version, set()).add(url)
+#                    result['digests'][url] = self._get_digest(info)
+        except Exception as e:
+            self.errors.put(text_type(e))
+            logger.exception('JSON fetch failed: %s', e)
+        return result
+
+
+class Page(object):
+    """
+    This class represents a scraped HTML page.
+    """
+    # The following slightly hairy-looking regex just looks for the contents of
+    # an anchor link, which has an attribute "href" either immediately preceded
+    # or immediately followed by a "rel" attribute. The attribute values can be
+    # declared with double quotes, single quotes or no quotes - which leads to
+    # the length of the expression.
+    _href = re.compile("""
+(rel\\s*=\\s*(?:"(?P<rel1>[^"]*)"|'(?P<rel2>[^']*)'|(?P<rel3>[^>\\s\n]*))\\s+)?
+href\\s*=\\s*(?:"(?P<url1>[^"]*)"|'(?P<url2>[^']*)'|(?P<url3>[^>\\s\n]*))
+(\\s+rel\\s*=\\s*(?:"(?P<rel4>[^"]*)"|'(?P<rel5>[^']*)'|(?P<rel6>[^>\\s\n]*)))?
+""", re.I | re.S | re.X)
+    _base = re.compile(r"""<base\s+href\s*=\s*['"]?([^'">]+)""", re.I | re.S)
+
+    def __init__(self, data, url):
+        """
+        Initialise an instance with the Unicode page contents and the URL they
+        came from.
+        """
+        self.data = data
+        self.base_url = self.url = url
+        m = self._base.search(self.data)
+        if m:
+            self.base_url = m.group(1)
+
+    _clean_re = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
+
+    @cached_property
+    def links(self):
+        """
+        Return the URLs of all the links on a page together with information
+        about their "rel" attribute, for determining which ones to treat as
+        downloads and which ones to queue for further scraping.
+        """
+        def clean(url):
+            "Tidy up an URL."
+            scheme, netloc, path, params, query, frag = urlparse(url)
+            return urlunparse((scheme, netloc, quote(path),
+                               params, query, frag))
+
+        result = set()
+        for match in self._href.finditer(self.data):
+            d = match.groupdict('')
+            rel = (d['rel1'] or d['rel2'] or d['rel3'] or
+                   d['rel4'] or d['rel5'] or d['rel6'])
+            url = d['url1'] or d['url2'] or d['url3']
+            url = urljoin(self.base_url, url)
+            url = unescape(url)
+            url = self._clean_re.sub(lambda m: '%%%2x' % ord(m.group(0)), url)
+            result.add((url, rel))
+        # We sort the result, hoping to bring the most recent versions
+        # to the front
+        result = sorted(result, key=lambda t: t[0], reverse=True)
+        return result
+
+
+class SimpleScrapingLocator(Locator):
+    """
+    A locator which scrapes HTML pages to locate downloads for a distribution.
+    This runs multiple threads to do the I/O; performance is at least as good
+    as pip's PackageFinder, which works in an analogous fashion.
+    """
+
+    # These are used to deal with various Content-Encoding schemes.
+    decoders = {
+        'deflate': zlib.decompress,
+        'gzip': lambda b: gzip.GzipFile(fileobj=BytesIO(d)).read(),
+        'none': lambda b: b,
+    }
+
+    def __init__(self, url, timeout=None, num_workers=10, **kwargs):
+        """
+        Initialise an instance.
+        :param url: The root URL to use for scraping.
+        :param timeout: The timeout, in seconds, to be applied to requests.
+                        This defaults to ``None`` (no timeout specified).
+        :param num_workers: The number of worker threads you want to do I/O,
+                            This defaults to 10.
+        :param kwargs: Passed to the superclass.
+        """
+        super(SimpleScrapingLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+        self.timeout = timeout
+        self._page_cache = {}
+        self._seen = set()
+        self._to_fetch = queue.Queue()
+        self._bad_hosts = set()
+        self.skip_externals = False
+        self.num_workers = num_workers
+        self._lock = threading.RLock()
+        # See issue #45: we need to be resilient when the locator is used
+        # in a thread, e.g. with concurrent.futures. We can't use self._lock
+        # as it is for coordinating our internal threads - the ones created
+        # in _prepare_threads.
+        self._gplock = threading.RLock()
+        self.platform_check = False  # See issue #112
+
+    def _prepare_threads(self):
+        """
+        Threads are created only when get_project is called, and terminate
+        before it returns. They are there primarily to parallelise I/O (i.e.
+        fetching web pages).
+        """
+        self._threads = []
+        for i in range(self.num_workers):
+            t = threading.Thread(target=self._fetch)
+            t.setDaemon(True)
+            t.start()
+            self._threads.append(t)
+
+    def _wait_threads(self):
+        """
+        Tell all the threads to terminate (by sending a sentinel value) and
+        wait for them to do so.
+        """
+        # Note that you need two loops, since you can't say which
+        # thread will get each sentinel
+        for t in self._threads:
+            self._to_fetch.put(None)    # sentinel
+        for t in self._threads:
+            t.join()
+        self._threads = []
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        with self._gplock:
+            self.result = result
+            self.project_name = name
+            url = urljoin(self.base_url, '%s/' % quote(name))
+            self._seen.clear()
+            self._page_cache.clear()
+            self._prepare_threads()
+            try:
+                logger.debug('Queueing %s', url)
+                self._to_fetch.put(url)
+                self._to_fetch.join()
+            finally:
+                self._wait_threads()
+            del self.result
+        return result
+
+    platform_dependent = re.compile(r'\b(linux_(i\d86|x86_64|arm\w+)|'
+                                    r'win(32|_amd64)|macosx_?\d+)\b', re.I)
+
+    def _is_platform_dependent(self, url):
+        """
+        Does an URL refer to a platform-specific download?
+        """
+        return self.platform_dependent.search(url)
+
+    def _process_download(self, url):
+        """
+        See if an URL is a suitable download for a project.
+
+        If it is, register information in the result dictionary (for
+        _get_project) about the specific version it's for.
+
+        Note that the return value isn't actually used other than as a boolean
+        value.
+        """
+        if self.platform_check and self._is_platform_dependent(url):
+            info = None
+        else:
+            info = self.convert_url_to_download_info(url, self.project_name)
+        logger.debug('process_download: %s -> %s', url, info)
+        if info:
+            with self._lock:    # needed because self.result is shared
+                self._update_version_data(self.result, info)
+        return info
+
+    def _should_queue(self, link, referrer, rel):
+        """
+        Determine whether a link URL from a referring page and with a
+        particular "rel" attribute should be queued for scraping.
+        """
+        scheme, netloc, path, _, _, _ = urlparse(link)
+        if path.endswith(self.source_extensions + self.binary_extensions +
+                         self.excluded_extensions):
+            result = False
+        elif self.skip_externals and not link.startswith(self.base_url):
+            result = False
+        elif not referrer.startswith(self.base_url):
+            result = False
+        elif rel not in ('homepage', 'download'):
+            result = False
+        elif scheme not in ('http', 'https', 'ftp'):
+            result = False
+        elif self._is_platform_dependent(link):
+            result = False
+        else:
+            host = netloc.split(':', 1)[0]
+            if host.lower() == 'localhost':
+                result = False
+            else:
+                result = True
+        logger.debug('should_queue: %s (%s) from %s -> %s', link, rel,
+                     referrer, result)
+        return result
+
+    def _fetch(self):
+        """
+        Get a URL to fetch from the work queue, get the HTML page, examine its
+        links for download candidates and candidates for further scraping.
+
+        This is a handy method to run in a thread.
+        """
+        while True:
+            url = self._to_fetch.get()
+            try:
+                if url:
+                    page = self.get_page(url)
+                    if page is None:    # e.g. after an error
+                        continue
+                    for link, rel in page.links:
+                        if link not in self._seen:
+                            try:
+                                self._seen.add(link)
+                                if (not self._process_download(link) and
+                                    self._should_queue(link, url, rel)):
+                                    logger.debug('Queueing %s from %s', link, url)
+                                    self._to_fetch.put(link)
+                            except MetadataInvalidError:  # e.g. invalid versions
+                                pass
+            except Exception as e:  # pragma: no cover
+                self.errors.put(text_type(e))
+            finally:
+                # always do this, to avoid hangs :-)
+                self._to_fetch.task_done()
+            if not url:
+                #logger.debug('Sentinel seen, quitting.')
+                break
+
+    def get_page(self, url):
+        """
+        Get the HTML for an URL, possibly from an in-memory cache.
+
+        XXX TODO Note: this cache is never actually cleared. It's assumed that
+        the data won't get stale over the lifetime of a locator instance (not
+        necessarily true for the default_locator).
+        """
+        # http://peak.telecommunity.com/DevCenter/EasyInstall#package-index-api
+        scheme, netloc, path, _, _, _ = urlparse(url)
+        if scheme == 'file' and os.path.isdir(url2pathname(path)):
+            url = urljoin(ensure_slash(url), 'index.html')
+
+        if url in self._page_cache:
+            result = self._page_cache[url]
+            logger.debug('Returning %s from cache: %s', url, result)
+        else:
+            host = netloc.split(':', 1)[0]
+            result = None
+            if host in self._bad_hosts:
+                logger.debug('Skipping %s due to bad host %s', url, host)
+            else:
+                req = Request(url, headers={'Accept-encoding': 'identity'})
+                try:
+                    logger.debug('Fetching %s', url)
+                    resp = self.opener.open(req, timeout=self.timeout)
+                    logger.debug('Fetched %s', url)
+                    headers = resp.info()
+                    content_type = headers.get('Content-Type', '')
+                    if HTML_CONTENT_TYPE.match(content_type):
+                        final_url = resp.geturl()
+                        data = resp.read()
+                        encoding = headers.get('Content-Encoding')
+                        if encoding:
+                            decoder = self.decoders[encoding]   # fail if not found
+                            data = decoder(data)
+                        encoding = 'utf-8'
+                        m = CHARSET.search(content_type)
+                        if m:
+                            encoding = m.group(1)
+                        try:
+                            data = data.decode(encoding)
+                        except UnicodeError:  # pragma: no cover
+                            data = data.decode('latin-1')    # fallback
+                        result = Page(data, final_url)
+                        self._page_cache[final_url] = result
+                except HTTPError as e:
+                    if e.code != 404:
+                        logger.exception('Fetch failed: %s: %s', url, e)
+                except URLError as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                    with self._lock:
+                        self._bad_hosts.add(host)
+                except Exception as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                finally:
+                    self._page_cache[url] = result   # even if None (failure)
+        return result
+
+    _distname_re = re.compile('<a href=[^>]*>([^<]+)<')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        page = self.get_page(self.base_url)
+        if not page:
+            raise DistlibException('Unable to get %s' % self.base_url)
+        for match in self._distname_re.finditer(page.data):
+            result.add(match.group(1))
+        return result
+
+class DirectoryLocator(Locator):
+    """
+    This class locates distributions in a directory tree.
+    """
+
+    def __init__(self, path, **kwargs):
+        """
+        Initialise an instance.
+        :param path: The root of the directory tree to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * recursive - if True (the default), subdirectories are
+                         recursed into. If False, only the top-level directory
+                         is searched,
+        """
+        self.recursive = kwargs.pop('recursive', True)
+        super(DirectoryLocator, self).__init__(**kwargs)
+        path = os.path.abspath(path)
+        if not os.path.isdir(path):  # pragma: no cover
+            raise DistlibException('Not a directory: %r' % path)
+        self.base_dir = path
+
+    def should_include(self, filename, parent):
+        """
+        Should a filename be considered as a candidate for a distribution
+        archive? As well as the filename, the directory which contains it
+        is provided, though not used by the current implementation.
+        """
+        return filename.endswith(self.downloadable_extensions)
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, name)
+                    if info:
+                        self._update_version_data(result, info)
+            if not self.recursive:
+                break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, None)
+                    if info:
+                        result.add(info['name'])
+            if not self.recursive:
+                break
+        return result
+
+class JSONLocator(Locator):
+    """
+    This locator uses special extended metadata (not available on PyPI) and is
+    the basis of performant dependency resolution in distlib. Other locators
+    require archive downloads before dependencies can be determined! As you
+    might imagine, that can be slow.
+    """
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        data = get_project_data(name)
+        if data:
+            for info in data.get('files', []):
+                if info['ptype'] != 'sdist' or info['pyversion'] != 'source':
+                    continue
+                # We don't store summary in project metadata as it makes
+                # the data bigger for no benefit during dependency
+                # resolution
+                dist = make_dist(data['name'], info['version'],
+                                 summary=data.get('summary',
+                                                  'Placeholder for summary'),
+                                 scheme=self.scheme)
+                md = dist.metadata
+                md.source_url = info['url']
+                # TODO SHA256 digest
+                if 'digest' in info and info['digest']:
+                    dist.digest = ('md5', info['digest'])
+                md.dependencies = info.get('requirements', {})
+                dist.exports = info.get('exports', {})
+                result[dist.version] = dist
+                result['urls'].setdefault(dist.version, set()).add(info['url'])
+        return result
+
+class DistPathLocator(Locator):
+    """
+    This locator finds installed distributions in a path. It can be useful for
+    adding to an :class:`AggregatingLocator`.
+    """
+    def __init__(self, distpath, **kwargs):
+        """
+        Initialise an instance.
+
+        :param distpath: A :class:`DistributionPath` instance to search.
+        """
+        super(DistPathLocator, self).__init__(**kwargs)
+        assert isinstance(distpath, DistributionPath)
+        self.distpath = distpath
+
+    def _get_project(self, name):
+        dist = self.distpath.get_distribution(name)
+        if dist is None:
+            result = {'urls': {}, 'digests': {}}
+        else:
+            result = {
+                dist.version: dist,
+                'urls': {dist.version: set([dist.source_url])},
+                'digests': {dist.version: set([None])}
+            }
+        return result
+
+
+class AggregatingLocator(Locator):
+    """
+    This class allows you to chain and/or merge a list of locators.
+    """
+    def __init__(self, *locators, **kwargs):
+        """
+        Initialise an instance.
+
+        :param locators: The list of locators to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * merge - if False (the default), the first successful
+                         search from any of the locators is returned. If True,
+                         the results from all locators are merged (this can be
+                         slow).
+        """
+        self.merge = kwargs.pop('merge', False)
+        self.locators = locators
+        super(AggregatingLocator, self).__init__(**kwargs)
+
+    def clear_cache(self):
+        super(AggregatingLocator, self).clear_cache()
+        for locator in self.locators:
+            locator.clear_cache()
+
+    def _set_scheme(self, value):
+        self._scheme = value
+        for locator in self.locators:
+            locator.scheme = value
+
+    scheme = property(Locator.scheme.fget, _set_scheme)
+
+    def _get_project(self, name):
+        result = {}
+        for locator in self.locators:
+            d = locator.get_project(name)
+            if d:
+                if self.merge:
+                    files = result.get('urls', {})
+                    digests = result.get('digests', {})
+                    # next line could overwrite result['urls'], result['digests']
+                    result.update(d)
+                    df = result.get('urls')
+                    if files and df:
+                        for k, v in files.items():
+                            if k in df:
+                                df[k] |= v
+                            else:
+                                df[k] = v
+                    dd = result.get('digests')
+                    if digests and dd:
+                        dd.update(digests)
+                else:
+                    # See issue #18. If any dists are found and we're looking
+                    # for specific constraints, we only return something if
+                    # a match is found. For example, if a DirectoryLocator
+                    # returns just foo (1.0) while we're looking for
+                    # foo (>= 2.0), we'll pretend there was nothing there so
+                    # that subsequent locators can be queried. Otherwise we
+                    # would just return foo (1.0) which would then lead to a
+                    # failure to find foo (>= 2.0), because other locators
+                    # weren't searched. Note that this only matters when
+                    # merge=False.
+                    if self.matcher is None:
+                        found = True
+                    else:
+                        found = False
+                        for k in d:
+                            if self.matcher.match(k):
+                                found = True
+                                break
+                    if found:
+                        result = d
+                        break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for locator in self.locators:
+            try:
+                result |= locator.get_distribution_names()
+            except NotImplementedError:
+                pass
+        return result
+
+
+# We use a legacy scheme simply because most of the dists on PyPI use legacy
+# versions which don't conform to PEP 426 / PEP 440.
+default_locator = AggregatingLocator(
+                    JSONLocator(),
+                    SimpleScrapingLocator('https://pypi.org/simple/',
+                                          timeout=3.0),
+                    scheme='legacy')
+
+locate = default_locator.locate
+
+NAME_VERSION_RE = re.compile(r'(?P<name>[\w-]+)\s*'
+                             r'\(\s*(==\s*)?(?P<ver>[^)]+)\)$')
+
+class DependencyFinder(object):
+    """
+    Locate dependencies for distributions.
+    """
+
+    def __init__(self, locator=None):
+        """
+        Initialise an instance, using the specified locator
+        to locate distributions.
+        """
+        self.locator = locator or default_locator
+        self.scheme = get_scheme(self.locator.scheme)
+
+    def add_distribution(self, dist):
+        """
+        Add a distribution to the finder. This will update internal information
+        about who provides what.
+        :param dist: The distribution to add.
+        """
+        logger.debug('adding distribution %s', dist)
+        name = dist.key
+        self.dists_by_name[name] = dist
+        self.dists[(name, dist.version)] = dist
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            self.provided.setdefault(name, set()).add((version, dist))
+
+    def remove_distribution(self, dist):
+        """
+        Remove a distribution from the finder. This will update internal
+        information about who provides what.
+        :param dist: The distribution to remove.
+        """
+        logger.debug('removing distribution %s', dist)
+        name = dist.key
+        del self.dists_by_name[name]
+        del self.dists[(name, dist.version)]
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Remove from provided: %s, %s, %s', name, version, dist)
+            s = self.provided[name]
+            s.remove((version, dist))
+            if not s:
+                del self.provided[name]
+
+    def get_matcher(self, reqt):
+        """
+        Get a version matcher for a requirement.
+        :param reqt: The requirement
+        :type reqt: str
+        :return: A version matcher (an instance of
+                 :class:`distlib.version.Matcher`).
+        """
+        try:
+            matcher = self.scheme.matcher(reqt)
+        except UnsupportedVersionError:  # pragma: no cover
+            # XXX compat-mode if cannot read the version
+            name = reqt.split()[0]
+            matcher = self.scheme.matcher(name)
+        return matcher
+
+    def find_providers(self, reqt):
+        """
+        Find the distributions which can fulfill a requirement.
+
+        :param reqt: The requirement.
+         :type reqt: str
+        :return: A set of distribution which can fulfill the requirement.
+        """
+        matcher = self.get_matcher(reqt)
+        name = matcher.key   # case-insensitive
+        result = set()
+        provided = self.provided
+        if name in provided:
+            for version, provider in provided[name]:
+                try:
+                    match = matcher.match(version)
+                except UnsupportedVersionError:
+                    match = False
+
+                if match:
+                    result.add(provider)
+                    break
+        return result
+
+    def try_to_replace(self, provider, other, problems):
+        """
+        Attempt to replace one provider with another. This is typically used
+        when resolving dependencies from multiple sources, e.g. A requires
+        (B >= 1.0) while C requires (B >= 1.1).
+
+        For successful replacement, ``provider`` must meet all the requirements
+        which ``other`` fulfills.
+
+        :param provider: The provider we are trying to replace with.
+        :param other: The provider we're trying to replace.
+        :param problems: If False is returned, this will contain what
+                         problems prevented replacement. This is currently
+                         a tuple of the literal string 'cantreplace',
+                         ``provider``, ``other``  and the set of requirements
+                         that ``provider`` couldn't fulfill.
+        :return: True if we can replace ``other`` with ``provider``, else
+                 False.
+        """
+        rlist = self.reqts[other]
+        unmatched = set()
+        for s in rlist:
+            matcher = self.get_matcher(s)
+            if not matcher.match(provider.version):
+                unmatched.add(s)
+        if unmatched:
+            # can't replace other with provider
+            problems.add(('cantreplace', provider, other,
+                          frozenset(unmatched)))
+            result = False
+        else:
+            # can replace other with provider
+            self.remove_distribution(other)
+            del self.reqts[other]
+            for s in rlist:
+                self.reqts.setdefault(provider, set()).add(s)
+            self.add_distribution(provider)
+            result = True
+        return result
+
+    def find(self, requirement, meta_extras=None, prereleases=False):
+        """
+        Find a distribution and all distributions it depends on.
+
+        :param requirement: The requirement specifying the distribution to
+                            find, or a Distribution instance.
+        :param meta_extras: A list of meta extras such as :test:, :build: and
+                            so on.
+        :param prereleases: If ``True``, allow pre-release versions to be
+                            returned - otherwise, don't return prereleases
+                            unless they're all that's available.
+
+        Return a set of :class:`Distribution` instances and a set of
+        problems.
+
+        The distributions returned should be such that they have the
+        :attr:`required` attribute set to ``True`` if they were
+        from the ``requirement`` passed to ``find()``, and they have the
+        :attr:`build_time_dependency` attribute set to ``True`` unless they
+        are post-installation dependencies of the ``requirement``.
+
+        The problems should be a tuple consisting of the string
+        ``'unsatisfied'`` and the requirement which couldn't be satisfied
+        by any distribution known to the locator.
+        """
+
+        self.provided = {}
+        self.dists = {}
+        self.dists_by_name = {}
+        self.reqts = {}
+
+        meta_extras = set(meta_extras or [])
+        if ':*:' in meta_extras:
+            meta_extras.remove(':*:')
+            # :meta: and :run: are implicitly included
+            meta_extras |= set([':test:', ':build:', ':dev:'])
+
+        if isinstance(requirement, Distribution):
+            dist = odist = requirement
+            logger.debug('passed %s as requirement', odist)
+        else:
+            dist = odist = self.locator.locate(requirement,
+                                               prereleases=prereleases)
+            if dist is None:
+                raise DistlibException('Unable to locate %r' % requirement)
+            logger.debug('located %s', odist)
+        dist.requested = True
+        problems = set()
+        todo = set([dist])
+        install_dists = set([odist])
+        while todo:
+            dist = todo.pop()
+            name = dist.key     # case-insensitive
+            if name not in self.dists_by_name:
+                self.add_distribution(dist)
+            else:
+                #import pdb; pdb.set_trace()
+                other = self.dists_by_name[name]
+                if other != dist:
+                    self.try_to_replace(dist, other, problems)
+
+            ireqts = dist.run_requires | dist.meta_requires
+            sreqts = dist.build_requires
+            ereqts = set()
+            if meta_extras and dist in install_dists:
+                for key in ('test', 'build', 'dev'):
+                    e = ':%s:' % key
+                    if e in meta_extras:
+                        ereqts |= getattr(dist, '%s_requires' % key)
+            all_reqts = ireqts | sreqts | ereqts
+            for r in all_reqts:
+                providers = self.find_providers(r)
+                if not providers:
+                    logger.debug('No providers found for %r', r)
+                    provider = self.locator.locate(r, prereleases=prereleases)
+                    # If no provider is found and we didn't consider
+                    # prereleases, consider them now.
+                    if provider is None and not prereleases:
+                        provider = self.locator.locate(r, prereleases=True)
+                    if provider is None:
+                        logger.debug('Cannot satisfy %r', r)
+                        problems.add(('unsatisfied', r))
+                    else:
+                        n, v = provider.key, provider.version
+                        if (n, v) not in self.dists:
+                            todo.add(provider)
+                        providers.add(provider)
+                        if r in ireqts and dist in install_dists:
+                            install_dists.add(provider)
+                            logger.debug('Adding %s to install_dists',
+                                         provider.name_and_version)
+                for p in providers:
+                    name = p.key
+                    if name not in self.dists_by_name:
+                        self.reqts.setdefault(p, set()).add(r)
+                    else:
+                        other = self.dists_by_name[name]
+                        if other != p:
+                            # see if other can be replaced by p
+                            self.try_to_replace(p, other, problems)
+
+        dists = set(self.dists.values())
+        for dist in dists:
+            dist.build_time_dependency = dist not in install_dists
+            if dist.build_time_dependency:
+                logger.debug('%s is a build-time dependency only.',
+                             dist.name_and_version)
+        logger.debug('find done for %s', odist)
+        return dists, problems
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/manifest.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/manifest.py
new file mode 100644
index 00000000..ca0fe442
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/manifest.py
@@ -0,0 +1,393 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2013 Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Class representing the list of files in a distribution.
+
+Equivalent to distutils.filelist, but fixes some problems.
+"""
+import fnmatch
+import logging
+import os
+import re
+import sys
+
+from . import DistlibException
+from .compat import fsdecode
+from .util import convert_path
+
+
+__all__ = ['Manifest']
+
+logger = logging.getLogger(__name__)
+
+# a \ followed by some spaces + EOL
+_COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
+_COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)
+
+#
+# Due to the different results returned by fnmatch.translate, we need
+# to do slightly different processing for Python 2.7 and 3.2 ... this needed
+# to be brought in for Python 3.6 onwards.
+#
+_PYTHON_VERSION = sys.version_info[:2]
+
+class Manifest(object):
+    """A list of files built by on exploring the filesystem and filtered by
+    applying various patterns to what we find there.
+    """
+
+    def __init__(self, base=None):
+        """
+        Initialise an instance.
+
+        :param base: The base directory to explore under.
+        """
+        self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
+        self.prefix = self.base + os.sep
+        self.allfiles = None
+        self.files = set()
+
+    #
+    # Public API
+    #
+
+    def findall(self):
+        """Find all files under the base and set ``allfiles`` to the absolute
+        pathnames of files found.
+        """
+        from stat import S_ISREG, S_ISDIR, S_ISLNK
+
+        self.allfiles = allfiles = []
+        root = self.base
+        stack = [root]
+        pop = stack.pop
+        push = stack.append
+
+        while stack:
+            root = pop()
+            names = os.listdir(root)
+
+            for name in names:
+                fullname = os.path.join(root, name)
+
+                # Avoid excess stat calls -- just one will do, thank you!
+                stat = os.stat(fullname)
+                mode = stat.st_mode
+                if S_ISREG(mode):
+                    allfiles.append(fsdecode(fullname))
+                elif S_ISDIR(mode) and not S_ISLNK(mode):
+                    push(fullname)
+
+    def add(self, item):
+        """
+        Add a file to the manifest.
+
+        :param item: The pathname to add. This can be relative to the base.
+        """
+        if not item.startswith(self.prefix):
+            item = os.path.join(self.base, item)
+        self.files.add(os.path.normpath(item))
+
+    def add_many(self, items):
+        """
+        Add a list of files to the manifest.
+
+        :param items: The pathnames to add. These can be relative to the base.
+        """
+        for item in items:
+            self.add(item)
+
+    def sorted(self, wantdirs=False):
+        """
+        Return sorted files in directory order
+        """
+
+        def add_dir(dirs, d):
+            dirs.add(d)
+            logger.debug('add_dir added %s', d)
+            if d != self.base:
+                parent, _ = os.path.split(d)
+                assert parent not in ('', '/')
+                add_dir(dirs, parent)
+
+        result = set(self.files)    # make a copy!
+        if wantdirs:
+            dirs = set()
+            for f in result:
+                add_dir(dirs, os.path.dirname(f))
+            result |= dirs
+        return [os.path.join(*path_tuple) for path_tuple in
+                sorted(os.path.split(path) for path in result)]
+
+    def clear(self):
+        """Clear all collected files."""
+        self.files = set()
+        self.allfiles = []
+
+    def process_directive(self, directive):
+        """
+        Process a directive which either adds some files from ``allfiles`` to
+        ``files``, or removes some files from ``files``.
+
+        :param directive: The directive to process. This should be in a format
+                     compatible with distutils ``MANIFEST.in`` files:
+
+                     http://docs.python.org/distutils/sourcedist.html#commands
+        """
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dirpattern).
+        action, patterns, thedir, dirpattern = self._parse_directive(directive)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=True):
+                    logger.warning('no files found matching %r', pattern)
+
+        elif action == 'exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=True)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'found matching %r', pattern)
+
+        elif action == 'global-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=False):
+                    logger.warning('no files found matching %r '
+                                   'anywhere in distribution', pattern)
+
+        elif action == 'global-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=False)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found anywhere in '
+                #                   'distribution', pattern)
+
+        elif action == 'recursive-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, prefix=thedir):
+                    logger.warning('no files found matching %r '
+                                   'under directory %r', pattern, thedir)
+
+        elif action == 'recursive-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, prefix=thedir)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found under directory %r',
+                #                   pattern, thedir)
+
+        elif action == 'graft':
+            if not self._include_pattern(None, prefix=dirpattern):
+                logger.warning('no directories found matching %r',
+                               dirpattern)
+
+        elif action == 'prune':
+            if not self._exclude_pattern(None, prefix=dirpattern):
+                logger.warning('no previously-included directories found '
+                               'matching %r', dirpattern)
+        else:   # pragma: no cover
+            # This should never happen, as it should be caught in
+            # _parse_template_line
+            raise DistlibException(
+                'invalid action %r' % action)
+
+    #
+    # Private API
+    #
+
+    def _parse_directive(self, directive):
+        """
+        Validate a directive.
+        :param directive: The directive to validate.
+        :return: A tuple of action, patterns, thedir, dir_patterns
+        """
+        words = directive.split()
+        if len(words) == 1 and words[0] not in ('include', 'exclude',
+                                                'global-include',
+                                                'global-exclude',
+                                                'recursive-include',
+                                                'recursive-exclude',
+                                                'graft', 'prune'):
+            # no action given, let's use the default 'include'
+            words.insert(0, 'include')
+
+        action = words[0]
+        patterns = thedir = dir_pattern = None
+
+        if action in ('include', 'exclude',
+                      'global-include', 'global-exclude'):
+            if len(words) < 2:
+                raise DistlibException(
+                    '%r expects <pattern1> <pattern2> ...' % action)
+
+            patterns = [convert_path(word) for word in words[1:]]
+
+        elif action in ('recursive-include', 'recursive-exclude'):
+            if len(words) < 3:
+                raise DistlibException(
+                    '%r expects <dir> <pattern1> <pattern2> ...' % action)
+
+            thedir = convert_path(words[1])
+            patterns = [convert_path(word) for word in words[2:]]
+
+        elif action in ('graft', 'prune'):
+            if len(words) != 2:
+                raise DistlibException(
+                    '%r expects a single <dir_pattern>' % action)
+
+            dir_pattern = convert_path(words[1])
+
+        else:
+            raise DistlibException('unknown action %r' % action)
+
+        return action, patterns, thedir, dir_pattern
+
+    def _include_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Select strings (presumably filenames) from 'self.files' that
+        match 'pattern', a Unix-style wildcard (glob) pattern.
+
+        Patterns are not quite the same as implemented by the 'fnmatch'
+        module: '*' and '?'  match non-special characters, where "special"
+        is platform-dependent: slash on Unix; colon, slash, and backslash on
+        DOS/Windows; and colon on Mac OS.
+
+        If 'anchor' is true (the default), then the pattern match is more
+        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
+        'anchor' is false, both of these will match.
+
+        If 'prefix' is supplied, then only filenames starting with 'prefix'
+        (itself a pattern) and ending with 'pattern', with anything in between
+        them, will match.  'anchor' is ignored in this case.
+
+        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
+        'pattern' is assumed to be either a string containing a regex or a
+        regex object -- no translation is done, the regex is just compiled
+        and used as-is.
+
+        Selected strings will be added to self.files.
+
+        Return True if files are found.
+        """
+        # XXX docstring lying about what the special chars are?
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+
+        # delayed loading of allfiles list
+        if self.allfiles is None:
+            self.findall()
+
+        for name in self.allfiles:
+            if pattern_re.search(name):
+                self.files.add(name)
+                found = True
+        return found
+
+    def _exclude_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Remove strings (presumably filenames) from 'files' that match
+        'pattern'.
+
+        Other parameters are the same as for 'include_pattern()', above.
+        The list 'self.files' is modified in place. Return True if files are
+        found.
+
+        This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
+        packaging source distributions
+        """
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+        for f in list(self.files):
+            if pattern_re.search(f):
+                self.files.remove(f)
+                found = True
+        return found
+
+    def _translate_pattern(self, pattern, anchor=True, prefix=None,
+                           is_regex=False):
+        """Translate a shell-like wildcard pattern to a compiled regular
+        expression.
+
+        Return the compiled regex.  If 'is_regex' true,
+        then 'pattern' is directly compiled to a regex (if it's a string)
+        or just returned as-is (assumes it's a regex object).
+        """
+        if is_regex:
+            if isinstance(pattern, str):
+                return re.compile(pattern)
+            else:
+                return pattern
+
+        if _PYTHON_VERSION > (3, 2):
+            # ditch start and end characters
+            start, _, end = self._glob_to_re('_').partition('_')
+
+        if pattern:
+            pattern_re = self._glob_to_re(pattern)
+            if _PYTHON_VERSION > (3, 2):
+                assert pattern_re.startswith(start) and pattern_re.endswith(end)
+        else:
+            pattern_re = ''
+
+        base = re.escape(os.path.join(self.base, ''))
+        if prefix is not None:
+            # ditch end of pattern character
+            if _PYTHON_VERSION <= (3, 2):
+                empty_pattern = self._glob_to_re('')
+                prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
+            else:
+                prefix_re = self._glob_to_re(prefix)
+                assert prefix_re.startswith(start) and prefix_re.endswith(end)
+                prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
+            sep = os.sep
+            if os.sep == '\\':
+                sep = r'\\'
+            if _PYTHON_VERSION <= (3, 2):
+                pattern_re = '^' + base + sep.join((prefix_re,
+                                                    '.*' + pattern_re))
+            else:
+                pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
+                pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
+                                                  pattern_re, end)
+        else:  # no prefix -- respect anchor flag
+            if anchor:
+                if _PYTHON_VERSION <= (3, 2):
+                    pattern_re = '^' + base + pattern_re
+                else:
+                    pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])
+
+        return re.compile(pattern_re)
+
+    def _glob_to_re(self, pattern):
+        """Translate a shell-like glob pattern to a regular expression.
+
+        Return a string containing the regex.  Differs from
+        'fnmatch.translate()' in that '*' does not match "special characters"
+        (which are platform-specific).
+        """
+        pattern_re = fnmatch.translate(pattern)
+
+        # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
+        # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
+        # and by extension they shouldn't match such "special characters" under
+        # any OS.  So change all non-escaped dots in the RE to match any
+        # character except the special characters (currently: just os.sep).
+        sep = os.sep
+        if os.sep == '\\':
+            # we're using a regex to manipulate a regex, so we need
+            # to escape the backslash twice
+            sep = r'\\\\'
+        escaped = r'\1[^%s]' % sep
+        pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
+        return pattern_re
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/markers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/markers.py
new file mode 100644
index 00000000..ee1f3e23
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/markers.py
@@ -0,0 +1,131 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Parser for the environment markers micro-language defined in PEP 508.
+"""
+
+# Note: In PEP 345, the micro-language was Python compatible, so the ast
+# module could be used to parse it. However, PEP 508 introduced operators such
+# as ~= and === which aren't in Python, necessitating a different approach.
+
+import os
+import sys
+import platform
+import re
+
+from .compat import python_implementation, urlparse, string_types
+from .util import in_venv, parse_marker
+
+__all__ = ['interpret']
+
+def _is_literal(o):
+    if not isinstance(o, string_types) or not o:
+        return False
+    return o[0] in '\'"'
+
+class Evaluator(object):
+    """
+    This class is used to evaluate marker expessions.
+    """
+
+    operations = {
+        '==': lambda x, y: x == y,
+        '===': lambda x, y: x == y,
+        '~=': lambda x, y: x == y or x > y,
+        '!=': lambda x, y: x != y,
+        '<':  lambda x, y: x < y,
+        '<=':  lambda x, y: x == y or x < y,
+        '>':  lambda x, y: x > y,
+        '>=':  lambda x, y: x == y or x > y,
+        'and': lambda x, y: x and y,
+        'or': lambda x, y: x or y,
+        'in': lambda x, y: x in y,
+        'not in': lambda x, y: x not in y,
+    }
+
+    def evaluate(self, expr, context):
+        """
+        Evaluate a marker expression returned by the :func:`parse_requirement`
+        function in the specified context.
+        """
+        if isinstance(expr, string_types):
+            if expr[0] in '\'"':
+                result = expr[1:-1]
+            else:
+                if expr not in context:
+                    raise SyntaxError('unknown variable: %s' % expr)
+                result = context[expr]
+        else:
+            assert isinstance(expr, dict)
+            op = expr['op']
+            if op not in self.operations:
+                raise NotImplementedError('op not implemented: %s' % op)
+            elhs = expr['lhs']
+            erhs = expr['rhs']
+            if _is_literal(expr['lhs']) and _is_literal(expr['rhs']):
+                raise SyntaxError('invalid comparison: %s %s %s' % (elhs, op, erhs))
+
+            lhs = self.evaluate(elhs, context)
+            rhs = self.evaluate(erhs, context)
+            result = self.operations[op](lhs, rhs)
+        return result
+
+def default_context():
+    def format_full_version(info):
+        version = '%s.%s.%s' % (info.major, info.minor, info.micro)
+        kind = info.releaselevel
+        if kind != 'final':
+            version += kind[0] + str(info.serial)
+        return version
+
+    if hasattr(sys, 'implementation'):
+        implementation_version = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        implementation_version = '0'
+        implementation_name = ''
+
+    result = {
+        'implementation_name': implementation_name,
+        'implementation_version': implementation_version,
+        'os_name': os.name,
+        'platform_machine': platform.machine(),
+        'platform_python_implementation': platform.python_implementation(),
+        'platform_release': platform.release(),
+        'platform_system': platform.system(),
+        'platform_version': platform.version(),
+        'platform_in_venv': str(in_venv()),
+        'python_full_version': platform.python_version(),
+        'python_version': platform.python_version()[:3],
+        'sys_platform': sys.platform,
+    }
+    return result
+
+DEFAULT_CONTEXT = default_context()
+del default_context
+
+evaluator = Evaluator()
+
+def interpret(marker, execution_context=None):
+    """
+    Interpret a marker and return a result depending on environment.
+
+    :param marker: The marker to interpret.
+    :type marker: str
+    :param execution_context: The context used for name lookup.
+    :type execution_context: mapping
+    """
+    try:
+        expr, rest = parse_marker(marker)
+    except Exception as e:
+        raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
+    if rest and rest[0] != '#':
+        raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
+    context = dict(DEFAULT_CONTEXT)
+    if execution_context:
+        context.update(execution_context)
+    return evaluator.evaluate(expr, context)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/metadata.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/metadata.py
new file mode 100644
index 00000000..2d61378e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/metadata.py
@@ -0,0 +1,1096 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Implementation of the Metadata for Python packages PEPs.
+
+Supports all metadata formats (1.0, 1.1, 1.2, and 2.0 experimental).
+"""
+from __future__ import unicode_literals
+
+import codecs
+from email import message_from_file
+import json
+import logging
+import re
+
+
+from . import DistlibException, __version__
+from .compat import StringIO, string_types, text_type
+from .markers import interpret
+from .util import extract_by_key, get_extras
+from .version import get_scheme, PEP440_VERSION_RE
+
+logger = logging.getLogger(__name__)
+
+
+class MetadataMissingError(DistlibException):
+    """A required metadata is missing"""
+
+
+class MetadataConflictError(DistlibException):
+    """Attempt to read or write metadata fields that are conflictual."""
+
+
+class MetadataUnrecognizedVersionError(DistlibException):
+    """Unknown metadata version number."""
+
+
+class MetadataInvalidError(DistlibException):
+    """A metadata value is invalid"""
+
+# public API of this module
+__all__ = ['Metadata', 'PKG_INFO_ENCODING', 'PKG_INFO_PREFERRED_VERSION']
+
+# Encoding used for the PKG-INFO files
+PKG_INFO_ENCODING = 'utf-8'
+
+# preferred version. Hopefully will be changed
+# to 1.2 once PEP 345 is supported everywhere
+PKG_INFO_PREFERRED_VERSION = '1.1'
+
+_LINE_PREFIX_1_2 = re.compile('\n       \\|')
+_LINE_PREFIX_PRE_1_2 = re.compile('\n        ')
+_241_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License')
+
+_314_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License', 'Classifier', 'Download-URL', 'Obsoletes',
+               'Provides', 'Requires')
+
+_314_MARKERS = ('Obsoletes', 'Provides', 'Requires', 'Classifier',
+                'Download-URL')
+
+_345_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External')
+
+_345_MARKERS = ('Provides-Dist', 'Requires-Dist', 'Requires-Python',
+                'Obsoletes-Dist', 'Requires-External', 'Maintainer',
+                'Maintainer-email', 'Project-URL')
+
+_426_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External', 'Private-Version',
+               'Obsoleted-By', 'Setup-Requires-Dist', 'Extension',
+               'Provides-Extra')
+
+_426_MARKERS = ('Private-Version', 'Provides-Extra', 'Obsoleted-By',
+                'Setup-Requires-Dist', 'Extension')
+
+# See issue #106: Sometimes 'Requires' and 'Provides' occur wrongly in
+# the metadata. Include them in the tuple literal below to allow them
+# (for now).
+_566_FIELDS = _426_FIELDS + ('Description-Content-Type',
+                             'Requires', 'Provides')
+
+_566_MARKERS = ('Description-Content-Type',)
+
+_ALL_FIELDS = set()
+_ALL_FIELDS.update(_241_FIELDS)
+_ALL_FIELDS.update(_314_FIELDS)
+_ALL_FIELDS.update(_345_FIELDS)
+_ALL_FIELDS.update(_426_FIELDS)
+_ALL_FIELDS.update(_566_FIELDS)
+
+EXTRA_RE = re.compile(r'''extra\s*==\s*("([^"]+)"|'([^']+)')''')
+
+
+def _version2fieldlist(version):
+    if version == '1.0':
+        return _241_FIELDS
+    elif version == '1.1':
+        return _314_FIELDS
+    elif version == '1.2':
+        return _345_FIELDS
+    elif version in ('1.3', '2.1'):
+        return _345_FIELDS + _566_FIELDS
+    elif version == '2.0':
+        return _426_FIELDS
+    raise MetadataUnrecognizedVersionError(version)
+
+
+def _best_version(fields):
+    """Detect the best version depending on the fields used."""
+    def _has_marker(keys, markers):
+        for marker in markers:
+            if marker in keys:
+                return True
+        return False
+
+    keys = []
+    for key, value in fields.items():
+        if value in ([], 'UNKNOWN', None):
+            continue
+        keys.append(key)
+
+    possible_versions = ['1.0', '1.1', '1.2', '1.3', '2.0', '2.1']
+
+    # first let's try to see if a field is not part of one of the version
+    for key in keys:
+        if key not in _241_FIELDS and '1.0' in possible_versions:
+            possible_versions.remove('1.0')
+            logger.debug('Removed 1.0 due to %s', key)
+        if key not in _314_FIELDS and '1.1' in possible_versions:
+            possible_versions.remove('1.1')
+            logger.debug('Removed 1.1 due to %s', key)
+        if key not in _345_FIELDS and '1.2' in possible_versions:
+            possible_versions.remove('1.2')
+            logger.debug('Removed 1.2 due to %s', key)
+        if key not in _566_FIELDS and '1.3' in possible_versions:
+            possible_versions.remove('1.3')
+            logger.debug('Removed 1.3 due to %s', key)
+        if key not in _566_FIELDS and '2.1' in possible_versions:
+            if key != 'Description':  # In 2.1, description allowed after headers
+                possible_versions.remove('2.1')
+                logger.debug('Removed 2.1 due to %s', key)
+        if key not in _426_FIELDS and '2.0' in possible_versions:
+            possible_versions.remove('2.0')
+            logger.debug('Removed 2.0 due to %s', key)
+
+    # possible_version contains qualified versions
+    if len(possible_versions) == 1:
+        return possible_versions[0]   # found !
+    elif len(possible_versions) == 0:
+        logger.debug('Out of options - unknown metadata set: %s', fields)
+        raise MetadataConflictError('Unknown metadata set')
+
+    # let's see if one unique marker is found
+    is_1_1 = '1.1' in possible_versions and _has_marker(keys, _314_MARKERS)
+    is_1_2 = '1.2' in possible_versions and _has_marker(keys, _345_MARKERS)
+    is_2_1 = '2.1' in possible_versions and _has_marker(keys, _566_MARKERS)
+    is_2_0 = '2.0' in possible_versions and _has_marker(keys, _426_MARKERS)
+    if int(is_1_1) + int(is_1_2) + int(is_2_1) + int(is_2_0) > 1:
+        raise MetadataConflictError('You used incompatible 1.1/1.2/2.0/2.1 fields')
+
+    # we have the choice, 1.0, or 1.2, or 2.0
+    #   - 1.0 has a broken Summary field but works with all tools
+    #   - 1.1 is to avoid
+    #   - 1.2 fixes Summary but has little adoption
+    #   - 2.0 adds more features and is very new
+    if not is_1_1 and not is_1_2 and not is_2_1 and not is_2_0:
+        # we couldn't find any specific marker
+        if PKG_INFO_PREFERRED_VERSION in possible_versions:
+            return PKG_INFO_PREFERRED_VERSION
+    if is_1_1:
+        return '1.1'
+    if is_1_2:
+        return '1.2'
+    if is_2_1:
+        return '2.1'
+
+    return '2.0'
+
+_ATTR2FIELD = {
+    'metadata_version': 'Metadata-Version',
+    'name': 'Name',
+    'version': 'Version',
+    'platform': 'Platform',
+    'supported_platform': 'Supported-Platform',
+    'summary': 'Summary',
+    'description': 'Description',
+    'keywords': 'Keywords',
+    'home_page': 'Home-page',
+    'author': 'Author',
+    'author_email': 'Author-email',
+    'maintainer': 'Maintainer',
+    'maintainer_email': 'Maintainer-email',
+    'license': 'License',
+    'classifier': 'Classifier',
+    'download_url': 'Download-URL',
+    'obsoletes_dist': 'Obsoletes-Dist',
+    'provides_dist': 'Provides-Dist',
+    'requires_dist': 'Requires-Dist',
+    'setup_requires_dist': 'Setup-Requires-Dist',
+    'requires_python': 'Requires-Python',
+    'requires_external': 'Requires-External',
+    'requires': 'Requires',
+    'provides': 'Provides',
+    'obsoletes': 'Obsoletes',
+    'project_url': 'Project-URL',
+    'private_version': 'Private-Version',
+    'obsoleted_by': 'Obsoleted-By',
+    'extension': 'Extension',
+    'provides_extra': 'Provides-Extra',
+}
+
+_PREDICATE_FIELDS = ('Requires-Dist', 'Obsoletes-Dist', 'Provides-Dist')
+_VERSIONS_FIELDS = ('Requires-Python',)
+_VERSION_FIELDS = ('Version',)
+_LISTFIELDS = ('Platform', 'Classifier', 'Obsoletes',
+               'Requires', 'Provides', 'Obsoletes-Dist',
+               'Provides-Dist', 'Requires-Dist', 'Requires-External',
+               'Project-URL', 'Supported-Platform', 'Setup-Requires-Dist',
+               'Provides-Extra', 'Extension')
+_LISTTUPLEFIELDS = ('Project-URL',)
+
+_ELEMENTSFIELD = ('Keywords',)
+
+_UNICODEFIELDS = ('Author', 'Maintainer', 'Summary', 'Description')
+
+_MISSING = object()
+
+_FILESAFE = re.compile('[^A-Za-z0-9.]+')
+
+
+def _get_name_and_version(name, version, for_filename=False):
+    """Return the distribution name with version.
+
+    If for_filename is true, return a filename-escaped form."""
+    if for_filename:
+        # For both name and version any runs of non-alphanumeric or '.'
+        # characters are replaced with a single '-'.  Additionally any
+        # spaces in the version string become '.'
+        name = _FILESAFE.sub('-', name)
+        version = _FILESAFE.sub('-', version.replace(' ', '.'))
+    return '%s-%s' % (name, version)
+
+
+class LegacyMetadata(object):
+    """The legacy metadata of a release.
+
+    Supports versions 1.0, 1.1 and 1.2 (auto-detected). You can
+    instantiate the class with one of these arguments (or none):
+    - *path*, the path to a metadata file
+    - *fileobj* give a file-like object with metadata as content
+    - *mapping* is a dict-like object
+    - *scheme* is a version scheme name
+    """
+    # TODO document the mapping API and UNKNOWN default key
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._fields = {}
+        self.requires_files = []
+        self._dependencies = None
+        self.scheme = scheme
+        if path is not None:
+            self.read(path)
+        elif fileobj is not None:
+            self.read_file(fileobj)
+        elif mapping is not None:
+            self.update(mapping)
+            self.set_metadata_version()
+
+    def set_metadata_version(self):
+        self._fields['Metadata-Version'] = _best_version(self._fields)
+
+    def _write_field(self, fileobj, name, value):
+        fileobj.write('%s: %s\n' % (name, value))
+
+    def __getitem__(self, name):
+        return self.get(name)
+
+    def __setitem__(self, name, value):
+        return self.set(name, value)
+
+    def __delitem__(self, name):
+        field_name = self._convert_name(name)
+        try:
+            del self._fields[field_name]
+        except KeyError:
+            raise KeyError(name)
+
+    def __contains__(self, name):
+        return (name in self._fields or
+                self._convert_name(name) in self._fields)
+
+    def _convert_name(self, name):
+        if name in _ALL_FIELDS:
+            return name
+        name = name.replace('-', '_').lower()
+        return _ATTR2FIELD.get(name, name)
+
+    def _default_value(self, name):
+        if name in _LISTFIELDS or name in _ELEMENTSFIELD:
+            return []
+        return 'UNKNOWN'
+
+    def _remove_line_prefix(self, value):
+        if self.metadata_version in ('1.0', '1.1'):
+            return _LINE_PREFIX_PRE_1_2.sub('\n', value)
+        else:
+            return _LINE_PREFIX_1_2.sub('\n', value)
+
+    def __getattr__(self, name):
+        if name in _ATTR2FIELD:
+            return self[name]
+        raise AttributeError(name)
+
+    #
+    # Public API
+    #
+
+#    dependencies = property(_get_dependencies, _set_dependencies)
+
+    def get_fullname(self, filesafe=False):
+        """Return the distribution name with version.
+
+        If filesafe is true, return a filename-escaped form."""
+        return _get_name_and_version(self['Name'], self['Version'], filesafe)
+
+    def is_field(self, name):
+        """return True if name is a valid metadata key"""
+        name = self._convert_name(name)
+        return name in _ALL_FIELDS
+
+    def is_multi_field(self, name):
+        name = self._convert_name(name)
+        return name in _LISTFIELDS
+
+    def read(self, filepath):
+        """Read the metadata values from a file path."""
+        fp = codecs.open(filepath, 'r', encoding='utf-8')
+        try:
+            self.read_file(fp)
+        finally:
+            fp.close()
+
+    def read_file(self, fileob):
+        """Read the metadata values from a file object."""
+        msg = message_from_file(fileob)
+        self._fields['Metadata-Version'] = msg['metadata-version']
+
+        # When reading, get all the fields we can
+        for field in _ALL_FIELDS:
+            if field not in msg:
+                continue
+            if field in _LISTFIELDS:
+                # we can have multiple lines
+                values = msg.get_all(field)
+                if field in _LISTTUPLEFIELDS and values is not None:
+                    values = [tuple(value.split(',')) for value in values]
+                self.set(field, values)
+            else:
+                # single line
+                value = msg[field]
+                if value is not None and value != 'UNKNOWN':
+                    self.set(field, value)
+        # logger.debug('Attempting to set metadata for %s', self)
+        # self.set_metadata_version()
+
+    def write(self, filepath, skip_unknown=False):
+        """Write the metadata fields to filepath."""
+        fp = codecs.open(filepath, 'w', encoding='utf-8')
+        try:
+            self.write_file(fp, skip_unknown)
+        finally:
+            fp.close()
+
+    def write_file(self, fileobject, skip_unknown=False):
+        """Write the PKG-INFO format data to a file object."""
+        self.set_metadata_version()
+
+        for field in _version2fieldlist(self['Metadata-Version']):
+            values = self.get(field)
+            if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']):
+                continue
+            if field in _ELEMENTSFIELD:
+                self._write_field(fileobject, field, ','.join(values))
+                continue
+            if field not in _LISTFIELDS:
+                if field == 'Description':
+                    if self.metadata_version in ('1.0', '1.1'):
+                        values = values.replace('\n', '\n        ')
+                    else:
+                        values = values.replace('\n', '\n       |')
+                values = [values]
+
+            if field in _LISTTUPLEFIELDS:
+                values = [','.join(value) for value in values]
+
+            for value in values:
+                self._write_field(fileobject, field, value)
+
+    def update(self, other=None, **kwargs):
+        """Set metadata values from the given iterable `other` and kwargs.
+
+        Behavior is like `dict.update`: If `other` has a ``keys`` method,
+        they are looped over and ``self[key]`` is assigned ``other[key]``.
+        Else, ``other`` is an iterable of ``(key, value)`` iterables.
+
+        Keys that don't match a metadata field or that have an empty value are
+        dropped.
+        """
+        def _set(key, value):
+            if key in _ATTR2FIELD and value:
+                self.set(self._convert_name(key), value)
+
+        if not other:
+            # other is None or empty container
+            pass
+        elif hasattr(other, 'keys'):
+            for k in other.keys():
+                _set(k, other[k])
+        else:
+            for k, v in other:
+                _set(k, v)
+
+        if kwargs:
+            for k, v in kwargs.items():
+                _set(k, v)
+
+    def set(self, name, value):
+        """Control then set a metadata field."""
+        name = self._convert_name(name)
+
+        if ((name in _ELEMENTSFIELD or name == 'Platform') and
+            not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [v.strip() for v in value.split(',')]
+            else:
+                value = []
+        elif (name in _LISTFIELDS and
+              not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [value]
+            else:
+                value = []
+
+        if logger.isEnabledFor(logging.WARNING):
+            project_name = self['Name']
+
+            scheme = get_scheme(self.scheme)
+            if name in _PREDICATE_FIELDS and value is not None:
+                for v in value:
+                    # check that the values are valid
+                    if not scheme.is_valid_matcher(v.split(';')[0]):
+                        logger.warning(
+                            "'%s': '%s' is not valid (field '%s')",
+                            project_name, v, name)
+            # FIXME this rejects UNKNOWN, is that right?
+            elif name in _VERSIONS_FIELDS and value is not None:
+                if not scheme.is_valid_constraint_list(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+            elif name in _VERSION_FIELDS and value is not None:
+                if not scheme.is_valid_version(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+
+        if name in _UNICODEFIELDS:
+            if name == 'Description':
+                value = self._remove_line_prefix(value)
+
+        self._fields[name] = value
+
+    def get(self, name, default=_MISSING):
+        """Get a metadata field."""
+        name = self._convert_name(name)
+        if name not in self._fields:
+            if default is _MISSING:
+                default = self._default_value(name)
+            return default
+        if name in _UNICODEFIELDS:
+            value = self._fields[name]
+            return value
+        elif name in _LISTFIELDS:
+            value = self._fields[name]
+            if value is None:
+                return []
+            res = []
+            for val in value:
+                if name not in _LISTTUPLEFIELDS:
+                    res.append(val)
+                else:
+                    # That's for Project-URL
+                    res.append((val[0], val[1]))
+            return res
+
+        elif name in _ELEMENTSFIELD:
+            value = self._fields[name]
+            if isinstance(value, string_types):
+                return value.split(',')
+        return self._fields[name]
+
+    def check(self, strict=False):
+        """Check if the metadata is compliant. If strict is True then raise if
+        no Name or Version are provided"""
+        self.set_metadata_version()
+
+        # XXX should check the versions (if the file was loaded)
+        missing, warnings = [], []
+
+        for attr in ('Name', 'Version'):  # required by PEP 345
+            if attr not in self:
+                missing.append(attr)
+
+        if strict and missing != []:
+            msg = 'missing required metadata: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+
+        for attr in ('Home-page', 'Author'):
+            if attr not in self:
+                missing.append(attr)
+
+        # checking metadata 1.2 (XXX needs to check 1.1, 1.0)
+        if self['Metadata-Version'] != '1.2':
+            return missing, warnings
+
+        scheme = get_scheme(self.scheme)
+
+        def are_valid_constraints(value):
+            for v in value:
+                if not scheme.is_valid_matcher(v.split(';')[0]):
+                    return False
+            return True
+
+        for fields, controller in ((_PREDICATE_FIELDS, are_valid_constraints),
+                                   (_VERSIONS_FIELDS,
+                                    scheme.is_valid_constraint_list),
+                                   (_VERSION_FIELDS,
+                                    scheme.is_valid_version)):
+            for field in fields:
+                value = self.get(field, None)
+                if value is not None and not controller(value):
+                    warnings.append("Wrong value for '%s': %s" % (field, value))
+
+        return missing, warnings
+
+    def todict(self, skip_missing=False):
+        """Return fields as a dict.
+
+        Field names will be converted to use the underscore-lowercase style
+        instead of hyphen-mixed case (i.e. home_page instead of Home-page).
+        """
+        self.set_metadata_version()
+
+        mapping_1_0 = (
+            ('metadata_version', 'Metadata-Version'),
+            ('name', 'Name'),
+            ('version', 'Version'),
+            ('summary', 'Summary'),
+            ('home_page', 'Home-page'),
+            ('author', 'Author'),
+            ('author_email', 'Author-email'),
+            ('license', 'License'),
+            ('description', 'Description'),
+            ('keywords', 'Keywords'),
+            ('platform', 'Platform'),
+            ('classifiers', 'Classifier'),
+            ('download_url', 'Download-URL'),
+        )
+
+        data = {}
+        for key, field_name in mapping_1_0:
+            if not skip_missing or field_name in self._fields:
+                data[key] = self[field_name]
+
+        if self['Metadata-Version'] == '1.2':
+            mapping_1_2 = (
+                ('requires_dist', 'Requires-Dist'),
+                ('requires_python', 'Requires-Python'),
+                ('requires_external', 'Requires-External'),
+                ('provides_dist', 'Provides-Dist'),
+                ('obsoletes_dist', 'Obsoletes-Dist'),
+                ('project_url', 'Project-URL'),
+                ('maintainer', 'Maintainer'),
+                ('maintainer_email', 'Maintainer-email'),
+            )
+            for key, field_name in mapping_1_2:
+                if not skip_missing or field_name in self._fields:
+                    if key != 'project_url':
+                        data[key] = self[field_name]
+                    else:
+                        data[key] = [','.join(u) for u in self[field_name]]
+
+        elif self['Metadata-Version'] == '1.1':
+            mapping_1_1 = (
+                ('provides', 'Provides'),
+                ('requires', 'Requires'),
+                ('obsoletes', 'Obsoletes'),
+            )
+            for key, field_name in mapping_1_1:
+                if not skip_missing or field_name in self._fields:
+                    data[key] = self[field_name]
+
+        return data
+
+    def add_requirements(self, requirements):
+        if self['Metadata-Version'] == '1.1':
+            # we can't have 1.1 metadata *and* Setuptools requires
+            for field in ('Obsoletes', 'Requires', 'Provides'):
+                if field in self:
+                    del self[field]
+        self['Requires-Dist'] += requirements
+
+    # Mapping API
+    # TODO could add iter* variants
+
+    def keys(self):
+        return list(_version2fieldlist(self['Metadata-Version']))
+
+    def __iter__(self):
+        for key in self.keys():
+            yield key
+
+    def values(self):
+        return [self[key] for key in self.keys()]
+
+    def items(self):
+        return [(key, self[key]) for key in self.keys()]
+
+    def __repr__(self):
+        return '<%s %s %s>' % (self.__class__.__name__, self.name,
+                               self.version)
+
+
+METADATA_FILENAME = 'pydist.json'
+WHEEL_METADATA_FILENAME = 'metadata.json'
+LEGACY_METADATA_FILENAME = 'METADATA'
+
+
+class Metadata(object):
+    """
+    The metadata of a release. This implementation uses 2.0 (JSON)
+    metadata where possible. If not possible, it wraps a LegacyMetadata
+    instance which handles the key-value metadata format.
+    """
+
+    METADATA_VERSION_MATCHER = re.compile(r'^\d+(\.\d+)*$')
+
+    NAME_MATCHER = re.compile('^[0-9A-Z]([0-9A-Z_.-]*[0-9A-Z])?$', re.I)
+
+    VERSION_MATCHER = PEP440_VERSION_RE
+
+    SUMMARY_MATCHER = re.compile('.{1,2047}')
+
+    METADATA_VERSION = '2.0'
+
+    GENERATOR = 'distlib (%s)' % __version__
+
+    MANDATORY_KEYS = {
+        'name': (),
+        'version': (),
+        'summary': ('legacy',),
+    }
+
+    INDEX_KEYS = ('name version license summary description author '
+                  'author_email keywords platform home_page classifiers '
+                  'download_url')
+
+    DEPENDENCY_KEYS = ('extras run_requires test_requires build_requires '
+                       'dev_requires provides meta_requires obsoleted_by '
+                       'supports_environments')
+
+    SYNTAX_VALIDATORS = {
+        'metadata_version': (METADATA_VERSION_MATCHER, ()),
+        'name': (NAME_MATCHER, ('legacy',)),
+        'version': (VERSION_MATCHER, ('legacy',)),
+        'summary': (SUMMARY_MATCHER, ('legacy',)),
+    }
+
+    __slots__ = ('_legacy', '_data', 'scheme')
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._legacy = None
+        self._data = None
+        self.scheme = scheme
+        #import pdb; pdb.set_trace()
+        if mapping is not None:
+            try:
+                self._validate_mapping(mapping, scheme)
+                self._data = mapping
+            except MetadataUnrecognizedVersionError:
+                self._legacy = LegacyMetadata(mapping=mapping, scheme=scheme)
+                self.validate()
+        else:
+            data = None
+            if path:
+                with open(path, 'rb') as f:
+                    data = f.read()
+            elif fileobj:
+                data = fileobj.read()
+            if data is None:
+                # Initialised with no args - to be added
+                self._data = {
+                    'metadata_version': self.METADATA_VERSION,
+                    'generator': self.GENERATOR,
+                }
+            else:
+                if not isinstance(data, text_type):
+                    data = data.decode('utf-8')
+                try:
+                    self._data = json.loads(data)
+                    self._validate_mapping(self._data, scheme)
+                except ValueError:
+                    # Note: MetadataUnrecognizedVersionError does not
+                    # inherit from ValueError (it's a DistlibException,
+                    # which should not inherit from ValueError).
+                    # The ValueError comes from the json.load - if that
+                    # succeeds and we get a validation error, we want
+                    # that to propagate
+                    self._legacy = LegacyMetadata(fileobj=StringIO(data),
+                                                  scheme=scheme)
+                    self.validate()
+
+    common_keys = set(('name', 'version', 'license', 'keywords', 'summary'))
+
+    none_list = (None, list)
+    none_dict = (None, dict)
+
+    mapped_keys = {
+        'run_requires': ('Requires-Dist', list),
+        'build_requires': ('Setup-Requires-Dist', list),
+        'dev_requires': none_list,
+        'test_requires': none_list,
+        'meta_requires': none_list,
+        'extras': ('Provides-Extra', list),
+        'modules': none_list,
+        'namespaces': none_list,
+        'exports': none_dict,
+        'commands': none_dict,
+        'classifiers': ('Classifier', list),
+        'source_url': ('Download-URL', None),
+        'metadata_version': ('Metadata-Version', None),
+    }
+
+    del none_list, none_dict
+
+    def __getattribute__(self, key):
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, maker = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    result = None if maker is None else maker()
+                else:
+                    result = self._legacy.get(lk)
+            else:
+                value = None if maker is None else maker()
+                if key not in ('commands', 'exports', 'modules', 'namespaces',
+                               'classifiers'):
+                    result = self._data.get(key, value)
+                else:
+                    # special cases for PEP 459
+                    sentinel = object()
+                    result = sentinel
+                    d = self._data.get('extensions')
+                    if d:
+                        if key == 'commands':
+                            result = d.get('python.commands', value)
+                        elif key == 'classifiers':
+                            d = d.get('python.details')
+                            if d:
+                                result = d.get(key, value)
+                        else:
+                            d = d.get('python.exports')
+                            if not d:
+                                d = self._data.get('python.exports')
+                            if d:
+                                result = d.get(key, value)
+                    if result is sentinel:
+                        result = value
+        elif key not in common:
+            result = object.__getattribute__(self, key)
+        elif self._legacy:
+            result = self._legacy.get(key)
+        else:
+            result = self._data.get(key)
+        return result
+
+    def _validate_value(self, key, value, scheme=None):
+        if key in self.SYNTAX_VALIDATORS:
+            pattern, exclusions = self.SYNTAX_VALIDATORS[key]
+            if (scheme or self.scheme) not in exclusions:
+                m = pattern.match(value)
+                if not m:
+                    raise MetadataInvalidError("'%s' is an invalid value for "
+                                               "the '%s' property" % (value,
+                                                                    key))
+
+    def __setattr__(self, key, value):
+        self._validate_value(key, value)
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, _ = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    raise NotImplementedError
+                self._legacy[lk] = value
+            elif key not in ('commands', 'exports', 'modules', 'namespaces',
+                             'classifiers'):
+                self._data[key] = value
+            else:
+                # special cases for PEP 459
+                d = self._data.setdefault('extensions', {})
+                if key == 'commands':
+                    d['python.commands'] = value
+                elif key == 'classifiers':
+                    d = d.setdefault('python.details', {})
+                    d[key] = value
+                else:
+                    d = d.setdefault('python.exports', {})
+                    d[key] = value
+        elif key not in common:
+            object.__setattr__(self, key, value)
+        else:
+            if key == 'keywords':
+                if isinstance(value, string_types):
+                    value = value.strip()
+                    if value:
+                        value = value.split()
+                    else:
+                        value = []
+            if self._legacy:
+                self._legacy[key] = value
+            else:
+                self._data[key] = value
+
+    @property
+    def name_and_version(self):
+        return _get_name_and_version(self.name, self.version, True)
+
+    @property
+    def provides(self):
+        if self._legacy:
+            result = self._legacy['Provides-Dist']
+        else:
+            result = self._data.setdefault('provides', [])
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in result:
+            result.append(s)
+        return result
+
+    @provides.setter
+    def provides(self, value):
+        if self._legacy:
+            self._legacy['Provides-Dist'] = value
+        else:
+            self._data['provides'] = value
+
+    def get_requirements(self, reqts, extras=None, env=None):
+        """
+        Base method to get dependencies, given a set of extras
+        to satisfy and an optional environment context.
+        :param reqts: A list of sometimes-wanted dependencies,
+                      perhaps dependent on extras and environment.
+        :param extras: A list of optional components being requested.
+        :param env: An optional environment for marker evaluation.
+        """
+        if self._legacy:
+            result = reqts
+        else:
+            result = []
+            extras = get_extras(extras or [], self.extras)
+            for d in reqts:
+                if 'extra' not in d and 'environment' not in d:
+                    # unconditional
+                    include = True
+                else:
+                    if 'extra' not in d:
+                        # Not extra-dependent - only environment-dependent
+                        include = True
+                    else:
+                        include = d.get('extra') in extras
+                    if include:
+                        # Not excluded because of extras, check environment
+                        marker = d.get('environment')
+                        if marker:
+                            include = interpret(marker, env)
+                if include:
+                    result.extend(d['requires'])
+            for key in ('build', 'dev', 'test'):
+                e = ':%s:' % key
+                if e in extras:
+                    extras.remove(e)
+                    # A recursive call, but it should terminate since 'test'
+                    # has been removed from the extras
+                    reqts = self._data.get('%s_requires' % key, [])
+                    result.extend(self.get_requirements(reqts, extras=extras,
+                                                        env=env))
+        return result
+
+    @property
+    def dictionary(self):
+        if self._legacy:
+            return self._from_legacy()
+        return self._data
+
+    @property
+    def dependencies(self):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            return extract_by_key(self._data, self.DEPENDENCY_KEYS)
+
+    @dependencies.setter
+    def dependencies(self, value):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            self._data.update(value)
+
+    def _validate_mapping(self, mapping, scheme):
+        if mapping.get('metadata_version') != self.METADATA_VERSION:
+            raise MetadataUnrecognizedVersionError()
+        missing = []
+        for key, exclusions in self.MANDATORY_KEYS.items():
+            if key not in mapping:
+                if scheme not in exclusions:
+                    missing.append(key)
+        if missing:
+            msg = 'Missing metadata items: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+        for k, v in mapping.items():
+            self._validate_value(k, v, scheme)
+
+    def validate(self):
+        if self._legacy:
+            missing, warnings = self._legacy.check(True)
+            if missing or warnings:
+                logger.warning('Metadata: missing: %s, warnings: %s',
+                               missing, warnings)
+        else:
+            self._validate_mapping(self._data, self.scheme)
+
+    def todict(self):
+        if self._legacy:
+            return self._legacy.todict(True)
+        else:
+            result = extract_by_key(self._data, self.INDEX_KEYS)
+            return result
+
+    def _from_legacy(self):
+        assert self._legacy and not self._data
+        result = {
+            'metadata_version': self.METADATA_VERSION,
+            'generator': self.GENERATOR,
+        }
+        lmd = self._legacy.todict(True)     # skip missing ones
+        for k in ('name', 'version', 'license', 'summary', 'description',
+                  'classifier'):
+            if k in lmd:
+                if k == 'classifier':
+                    nk = 'classifiers'
+                else:
+                    nk = k
+                result[nk] = lmd[k]
+        kw = lmd.get('Keywords', [])
+        if kw == ['']:
+            kw = []
+        result['keywords'] = kw
+        keys = (('requires_dist', 'run_requires'),
+                ('setup_requires_dist', 'build_requires'))
+        for ok, nk in keys:
+            if ok in lmd and lmd[ok]:
+                result[nk] = [{'requires': lmd[ok]}]
+        result['provides'] = self.provides
+        author = {}
+        maintainer = {}
+        return result
+
+    LEGACY_MAPPING = {
+        'name': 'Name',
+        'version': 'Version',
+        'license': 'License',
+        'summary': 'Summary',
+        'description': 'Description',
+        'classifiers': 'Classifier',
+    }
+
+    def _to_legacy(self):
+        def process_entries(entries):
+            reqts = set()
+            for e in entries:
+                extra = e.get('extra')
+                env = e.get('environment')
+                rlist = e['requires']
+                for r in rlist:
+                    if not env and not extra:
+                        reqts.add(r)
+                    else:
+                        marker = ''
+                        if extra:
+                            marker = 'extra == "%s"' % extra
+                        if env:
+                            if marker:
+                                marker = '(%s) and %s' % (env, marker)
+                            else:
+                                marker = env
+                        reqts.add(';'.join((r, marker)))
+            return reqts
+
+        assert self._data and not self._legacy
+        result = LegacyMetadata()
+        nmd = self._data
+        for nk, ok in self.LEGACY_MAPPING.items():
+            if nk in nmd:
+                result[ok] = nmd[nk]
+        r1 = process_entries(self.run_requires + self.meta_requires)
+        r2 = process_entries(self.build_requires + self.dev_requires)
+        if self.extras:
+            result['Provides-Extra'] = sorted(self.extras)
+        result['Requires-Dist'] = sorted(r1)
+        result['Setup-Requires-Dist'] = sorted(r2)
+        # TODO: other fields such as contacts
+        return result
+
+    def write(self, path=None, fileobj=None, legacy=False, skip_unknown=True):
+        if [path, fileobj].count(None) != 1:
+            raise ValueError('Exactly one of path and fileobj is needed')
+        self.validate()
+        if legacy:
+            if self._legacy:
+                legacy_md = self._legacy
+            else:
+                legacy_md = self._to_legacy()
+            if path:
+                legacy_md.write(path, skip_unknown=skip_unknown)
+            else:
+                legacy_md.write_file(fileobj, skip_unknown=skip_unknown)
+        else:
+            if self._legacy:
+                d = self._from_legacy()
+            else:
+                d = self._data
+            if fileobj:
+                json.dump(d, fileobj, ensure_ascii=True, indent=2,
+                          sort_keys=True)
+            else:
+                with codecs.open(path, 'w', 'utf-8') as f:
+                    json.dump(d, f, ensure_ascii=True, indent=2,
+                              sort_keys=True)
+
+    def add_requirements(self, requirements):
+        if self._legacy:
+            self._legacy.add_requirements(requirements)
+        else:
+            run_requires = self._data.setdefault('run_requires', [])
+            always = None
+            for entry in run_requires:
+                if 'environment' not in entry and 'extra' not in entry:
+                    always = entry
+                    break
+            if always is None:
+                always = { 'requires': requirements }
+                run_requires.insert(0, always)
+            else:
+                rset = set(always['requires']) | set(requirements)
+                always['requires'] = sorted(rset)
+
+    def __repr__(self):
+        name = self.name or '(no name)'
+        version = self.version or 'no version'
+        return '<%s %s %s (%s)>' % (self.__class__.__name__,
+                                    self.metadata_version, name, version)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/resources.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/resources.py
new file mode 100644
index 00000000..18840167
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/resources.py
@@ -0,0 +1,355 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import bisect
+import io
+import logging
+import os
+import pkgutil
+import shutil
+import sys
+import types
+import zipimport
+
+from . import DistlibException
+from .util import cached_property, get_cache_base, path_to_cache_dir, Cache
+
+logger = logging.getLogger(__name__)
+
+
+cache = None    # created when needed
+
+
+class ResourceCache(Cache):
+    def __init__(self, base=None):
+        if base is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('resource-cache'))
+        super(ResourceCache, self).__init__(base)
+
+    def is_stale(self, resource, path):
+        """
+        Is the cache stale for the given resource?
+
+        :param resource: The :class:`Resource` being cached.
+        :param path: The path of the resource in the cache.
+        :return: True if the cache is stale.
+        """
+        # Cache invalidation is a hard problem :-)
+        return True
+
+    def get(self, resource):
+        """
+        Get a resource into the cache,
+
+        :param resource: A :class:`Resource` instance.
+        :return: The pathname of the resource in the cache.
+        """
+        prefix, path = resource.finder.get_cache_info(resource)
+        if prefix is None:
+            result = path
+        else:
+            result = os.path.join(self.base, self.prefix_to_dir(prefix), path)
+            dirname = os.path.dirname(result)
+            if not os.path.isdir(dirname):
+                os.makedirs(dirname)
+            if not os.path.exists(result):
+                stale = True
+            else:
+                stale = self.is_stale(resource, path)
+            if stale:
+                # write the bytes of the resource to the cache location
+                with open(result, 'wb') as f:
+                    f.write(resource.bytes)
+        return result
+
+
+class ResourceBase(object):
+    def __init__(self, finder, name):
+        self.finder = finder
+        self.name = name
+
+
+class Resource(ResourceBase):
+    """
+    A class representing an in-package resource, such as a data file. This is
+    not normally instantiated by user code, but rather by a
+    :class:`ResourceFinder` which manages the resource.
+    """
+    is_container = False        # Backwards compatibility
+
+    def as_stream(self):
+        """
+        Get the resource as a stream.
+
+        This is not a property to make it obvious that it returns a new stream
+        each time.
+        """
+        return self.finder.get_stream(self)
+
+    @cached_property
+    def file_path(self):
+        global cache
+        if cache is None:
+            cache = ResourceCache()
+        return cache.get(self)
+
+    @cached_property
+    def bytes(self):
+        return self.finder.get_bytes(self)
+
+    @cached_property
+    def size(self):
+        return self.finder.get_size(self)
+
+
+class ResourceContainer(ResourceBase):
+    is_container = True     # Backwards compatibility
+
+    @cached_property
+    def resources(self):
+        return self.finder.get_resources(self)
+
+
+class ResourceFinder(object):
+    """
+    Resource finder for file system resources.
+    """
+
+    if sys.platform.startswith('java'):
+        skipped_extensions = ('.pyc', '.pyo', '.class')
+    else:
+        skipped_extensions = ('.pyc', '.pyo')
+
+    def __init__(self, module):
+        self.module = module
+        self.loader = getattr(module, '__loader__', None)
+        self.base = os.path.dirname(getattr(module, '__file__', ''))
+
+    def _adjust_path(self, path):
+        return os.path.realpath(path)
+
+    def _make_path(self, resource_name):
+        # Issue #50: need to preserve type of path on Python 2.x
+        # like os.path._get_sep
+        if isinstance(resource_name, bytes):    # should only happen on 2.x
+            sep = b'/'
+        else:
+            sep = '/'
+        parts = resource_name.split(sep)
+        parts.insert(0, self.base)
+        result = os.path.join(*parts)
+        return self._adjust_path(result)
+
+    def _find(self, path):
+        return os.path.exists(path)
+
+    def get_cache_info(self, resource):
+        return None, resource.path
+
+    def find(self, resource_name):
+        path = self._make_path(resource_name)
+        if not self._find(path):
+            result = None
+        else:
+            if self._is_directory(path):
+                result = ResourceContainer(self, resource_name)
+            else:
+                result = Resource(self, resource_name)
+            result.path = path
+        return result
+
+    def get_stream(self, resource):
+        return open(resource.path, 'rb')
+
+    def get_bytes(self, resource):
+        with open(resource.path, 'rb') as f:
+            return f.read()
+
+    def get_size(self, resource):
+        return os.path.getsize(resource.path)
+
+    def get_resources(self, resource):
+        def allowed(f):
+            return (f != '__pycache__' and not
+                    f.endswith(self.skipped_extensions))
+        return set([f for f in os.listdir(resource.path) if allowed(f)])
+
+    def is_container(self, resource):
+        return self._is_directory(resource.path)
+
+    _is_directory = staticmethod(os.path.isdir)
+
+    def iterator(self, resource_name):
+        resource = self.find(resource_name)
+        if resource is not None:
+            todo = [resource]
+            while todo:
+                resource = todo.pop(0)
+                yield resource
+                if resource.is_container:
+                    rname = resource.name
+                    for name in resource.resources:
+                        if not rname:
+                            new_name = name
+                        else:
+                            new_name = '/'.join([rname, name])
+                        child = self.find(new_name)
+                        if child.is_container:
+                            todo.append(child)
+                        else:
+                            yield child
+
+
+class ZipResourceFinder(ResourceFinder):
+    """
+    Resource finder for resources in .zip files.
+    """
+    def __init__(self, module):
+        super(ZipResourceFinder, self).__init__(module)
+        archive = self.loader.archive
+        self.prefix_len = 1 + len(archive)
+        # PyPy doesn't have a _files attr on zipimporter, and you can't set one
+        if hasattr(self.loader, '_files'):
+            self._files = self.loader._files
+        else:
+            self._files = zipimport._zip_directory_cache[archive]
+        self.index = sorted(self._files)
+
+    def _adjust_path(self, path):
+        return path
+
+    def _find(self, path):
+        path = path[self.prefix_len:]
+        if path in self._files:
+            result = True
+        else:
+            if path and path[-1] != os.sep:
+                path = path + os.sep
+            i = bisect.bisect(self.index, path)
+            try:
+                result = self.index[i].startswith(path)
+            except IndexError:
+                result = False
+        if not result:
+            logger.debug('_find failed: %r %r', path, self.loader.prefix)
+        else:
+            logger.debug('_find worked: %r %r', path, self.loader.prefix)
+        return result
+
+    def get_cache_info(self, resource):
+        prefix = self.loader.archive
+        path = resource.path[1 + len(prefix):]
+        return prefix, path
+
+    def get_bytes(self, resource):
+        return self.loader.get_data(resource.path)
+
+    def get_stream(self, resource):
+        return io.BytesIO(self.get_bytes(resource))
+
+    def get_size(self, resource):
+        path = resource.path[self.prefix_len:]
+        return self._files[path][3]
+
+    def get_resources(self, resource):
+        path = resource.path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        plen = len(path)
+        result = set()
+        i = bisect.bisect(self.index, path)
+        while i < len(self.index):
+            if not self.index[i].startswith(path):
+                break
+            s = self.index[i][plen:]
+            result.add(s.split(os.sep, 1)[0])   # only immediate children
+            i += 1
+        return result
+
+    def _is_directory(self, path):
+        path = path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        i = bisect.bisect(self.index, path)
+        try:
+            result = self.index[i].startswith(path)
+        except IndexError:
+            result = False
+        return result
+
+_finder_registry = {
+    type(None): ResourceFinder,
+    zipimport.zipimporter: ZipResourceFinder
+}
+
+try:
+    # In Python 3.6, _frozen_importlib -> _frozen_importlib_external
+    try:
+        import _frozen_importlib_external as _fi
+    except ImportError:
+        import _frozen_importlib as _fi
+    _finder_registry[_fi.SourceFileLoader] = ResourceFinder
+    _finder_registry[_fi.FileFinder] = ResourceFinder
+    del _fi
+except (ImportError, AttributeError):
+    pass
+
+
+def register_finder(loader, finder_maker):
+    _finder_registry[type(loader)] = finder_maker
+
+_finder_cache = {}
+
+
+def finder(package):
+    """
+    Return a resource finder for a package.
+    :param package: The name of the package.
+    :return: A :class:`ResourceFinder` instance for the package.
+    """
+    if package in _finder_cache:
+        result = _finder_cache[package]
+    else:
+        if package not in sys.modules:
+            __import__(package)
+        module = sys.modules[package]
+        path = getattr(module, '__path__', None)
+        if path is None:
+            raise DistlibException('You cannot get a finder for a module, '
+                                   'only for a package')
+        loader = getattr(module, '__loader__', None)
+        finder_maker = _finder_registry.get(type(loader))
+        if finder_maker is None:
+            raise DistlibException('Unable to locate finder for %r' % package)
+        result = finder_maker(module)
+        _finder_cache[package] = result
+    return result
+
+
+_dummy_module = types.ModuleType(str('__dummy__'))
+
+
+def finder_for_path(path):
+    """
+    Return a resource finder for a path, which should represent a container.
+
+    :param path: The path.
+    :return: A :class:`ResourceFinder` instance for the path.
+    """
+    result = None
+    # calls any path hooks, gets importer into cache
+    pkgutil.get_importer(path)
+    loader = sys.path_importer_cache.get(path)
+    finder = _finder_registry.get(type(loader))
+    if finder:
+        module = _dummy_module
+        module.__file__ = os.path.join(path, '')
+        module.__loader__ = loader
+        result = finder(module)
+    return result
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/scripts.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/scripts.py
new file mode 100644
index 00000000..5965e241
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/scripts.py
@@ -0,0 +1,403 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from io import BytesIO
+import logging
+import os
+import re
+import struct
+import sys
+
+from .compat import sysconfig, detect_encoding, ZipFile
+from .resources import finder
+from .util import (FileOperator, get_export_entry, convert_path,
+                   get_executable, in_venv)
+
+logger = logging.getLogger(__name__)
+
+_DEFAULT_MANIFEST = '''
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+ <assemblyIdentity version="1.0.0.0"
+ processorArchitecture="X86"
+ name="%s"
+ type="win32"/>
+
+ <!-- Identify the application security requirements. -->
+ <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+ <security>
+ <requestedPrivileges>
+ <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+ </requestedPrivileges>
+ </security>
+ </trustInfo>
+</assembly>'''.strip()
+
+# check if Python is called on the first line with this expression
+FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
+SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
+import re
+import sys
+from %(module)s import %(import_name)s
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(%(func)s())
+'''
+
+
+def _enquote_executable(executable):
+    if ' ' in executable:
+        # make sure we quote only the executable in case of env
+        # for example /usr/bin/env "/dir with spaces/bin/jython"
+        # instead of "/usr/bin/env /dir with spaces/bin/jython"
+        # otherwise whole
+        if executable.startswith('/usr/bin/env '):
+            env, _executable = executable.split(' ', 1)
+            if ' ' in _executable and not _executable.startswith('"'):
+                executable = '%s "%s"' % (env, _executable)
+        else:
+            if not executable.startswith('"'):
+                executable = '"%s"' % executable
+    return executable
+
+
+class ScriptMaker(object):
+    """
+    A class to copy or create scripts from source scripts or callable
+    specifications.
+    """
+    script_template = SCRIPT_TEMPLATE
+
+    executable = None  # for shebangs
+
+    def __init__(self, source_dir, target_dir, add_launchers=True,
+                 dry_run=False, fileop=None):
+        self.source_dir = source_dir
+        self.target_dir = target_dir
+        self.add_launchers = add_launchers
+        self.force = False
+        self.clobber = False
+        # It only makes sense to set mode bits on POSIX.
+        self.set_mode = (os.name == 'posix') or (os.name == 'java' and
+                                                 os._name == 'posix')
+        self.variants = set(('', 'X.Y'))
+        self._fileop = fileop or FileOperator(dry_run)
+
+        self._is_nt = os.name == 'nt' or (
+            os.name == 'java' and os._name == 'nt')
+
+    def _get_alternate_executable(self, executable, options):
+        if options.get('gui', False) and self._is_nt:  # pragma: no cover
+            dn, fn = os.path.split(executable)
+            fn = fn.replace('python', 'pythonw')
+            executable = os.path.join(dn, fn)
+        return executable
+
+    if sys.platform.startswith('java'):  # pragma: no cover
+        def _is_shell(self, executable):
+            """
+            Determine if the specified executable is a script
+            (contains a #! line)
+            """
+            try:
+                with open(executable) as fp:
+                    return fp.read(2) == '#!'
+            except (OSError, IOError):
+                logger.warning('Failed to open %s', executable)
+                return False
+
+        def _fix_jython_executable(self, executable):
+            if self._is_shell(executable):
+                # Workaround for Jython is not needed on Linux systems.
+                import java
+
+                if java.lang.System.getProperty('os.name') == 'Linux':
+                    return executable
+            elif executable.lower().endswith('jython.exe'):
+                # Use wrapper exe for Jython on Windows
+                return executable
+            return '/usr/bin/env %s' % executable
+
+    def _build_shebang(self, executable, post_interp):
+        """
+        Build a shebang line. In the simple case (on Windows, or a shebang line
+        which is not too long or contains spaces) use a simple formulation for
+        the shebang. Otherwise, use /bin/sh as the executable, with a contrived
+        shebang which allows the script to run either under Python or sh, using
+        suitable quoting. Thanks to Harald Nordgren for his input.
+
+        See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
+                  https://hg.mozilla.org/mozilla-central/file/tip/mach
+        """
+        if os.name != 'posix':
+            simple_shebang = True
+        else:
+            # Add 3 for '#!' prefix and newline suffix.
+            shebang_length = len(executable) + len(post_interp) + 3
+            if sys.platform == 'darwin':
+                max_shebang_length = 512
+            else:
+                max_shebang_length = 127
+            simple_shebang = ((b' ' not in executable) and
+                              (shebang_length <= max_shebang_length))
+
+        if simple_shebang:
+            result = b'#!' + executable + post_interp + b'\n'
+        else:
+            result = b'#!/bin/sh\n'
+            result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
+            result += b"' '''"
+        return result
+
+    def _get_shebang(self, encoding, post_interp=b'', options=None):
+        enquote = True
+        if self.executable:
+            executable = self.executable
+            enquote = False     # assume this will be taken care of
+        elif not sysconfig.is_python_build():
+            executable = get_executable()
+        elif in_venv():  # pragma: no cover
+            executable = os.path.join(sysconfig.get_path('scripts'),
+                            'python%s' % sysconfig.get_config_var('EXE'))
+        else:  # pragma: no cover
+            executable = os.path.join(
+                sysconfig.get_config_var('BINDIR'),
+               'python%s%s' % (sysconfig.get_config_var('VERSION'),
+                               sysconfig.get_config_var('EXE')))
+        if options:
+            executable = self._get_alternate_executable(executable, options)
+
+        if sys.platform.startswith('java'):  # pragma: no cover
+            executable = self._fix_jython_executable(executable)
+        # Normalise case for Windows
+        executable = os.path.normcase(executable)
+        # If the user didn't specify an executable, it may be necessary to
+        # cater for executable paths with spaces (not uncommon on Windows)
+        if enquote:
+            executable = _enquote_executable(executable)
+        # Issue #51: don't use fsencode, since we later try to
+        # check that the shebang is decodable using utf-8.
+        executable = executable.encode('utf-8')
+        # in case of IronPython, play safe and enable frames support
+        if (sys.platform == 'cli' and '-X:Frames' not in post_interp
+            and '-X:FullFrames' not in post_interp):  # pragma: no cover
+            post_interp += b' -X:Frames'
+        shebang = self._build_shebang(executable, post_interp)
+        # Python parser starts to read a script using UTF-8 until
+        # it gets a #coding:xxx cookie. The shebang has to be the
+        # first line of a file, the #coding:xxx cookie cannot be
+        # written before. So the shebang has to be decodable from
+        # UTF-8.
+        try:
+            shebang.decode('utf-8')
+        except UnicodeDecodeError:  # pragma: no cover
+            raise ValueError(
+                'The shebang (%r) is not decodable from utf-8' % shebang)
+        # If the script is encoded to a custom encoding (use a
+        # #coding:xxx cookie), the shebang has to be decodable from
+        # the script encoding too.
+        if encoding != 'utf-8':
+            try:
+                shebang.decode(encoding)
+            except UnicodeDecodeError:  # pragma: no cover
+                raise ValueError(
+                    'The shebang (%r) is not decodable '
+                    'from the script encoding (%r)' % (shebang, encoding))
+        return shebang
+
+    def _get_script_text(self, entry):
+        return self.script_template % dict(module=entry.prefix,
+                                           import_name=entry.suffix.split('.')[0],
+                                           func=entry.suffix)
+
+    manifest = _DEFAULT_MANIFEST
+
+    def get_manifest(self, exename):
+        base = os.path.basename(exename)
+        return self.manifest % base
+
+    def _write_script(self, names, shebang, script_bytes, filenames, ext):
+        use_launcher = self.add_launchers and self._is_nt
+        linesep = os.linesep.encode('utf-8')
+        if not shebang.endswith(linesep):
+            shebang += linesep
+        if not use_launcher:
+            script_bytes = shebang + script_bytes
+        else:  # pragma: no cover
+            if ext == 'py':
+                launcher = self._get_launcher('t')
+            else:
+                launcher = self._get_launcher('w')
+            stream = BytesIO()
+            with ZipFile(stream, 'w') as zf:
+                zf.writestr('__main__.py', script_bytes)
+            zip_data = stream.getvalue()
+            script_bytes = launcher + shebang + zip_data
+        for name in names:
+            outname = os.path.join(self.target_dir, name)
+            if use_launcher:  # pragma: no cover
+                n, e = os.path.splitext(outname)
+                if e.startswith('.py'):
+                    outname = n
+                outname = '%s.exe' % outname
+                try:
+                    self._fileop.write_binary_file(outname, script_bytes)
+                except Exception:
+                    # Failed writing an executable - it might be in use.
+                    logger.warning('Failed to write executable - trying to '
+                                   'use .deleteme logic')
+                    dfname = '%s.deleteme' % outname
+                    if os.path.exists(dfname):
+                        os.remove(dfname)       # Not allowed to fail here
+                    os.rename(outname, dfname)  # nor here
+                    self._fileop.write_binary_file(outname, script_bytes)
+                    logger.debug('Able to replace executable using '
+                                 '.deleteme logic')
+                    try:
+                        os.remove(dfname)
+                    except Exception:
+                        pass    # still in use - ignore error
+            else:
+                if self._is_nt and not outname.endswith('.' + ext):  # pragma: no cover
+                    outname = '%s.%s' % (outname, ext)
+                if os.path.exists(outname) and not self.clobber:
+                    logger.warning('Skipping existing file %s', outname)
+                    continue
+                self._fileop.write_binary_file(outname, script_bytes)
+                if self.set_mode:
+                    self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+
+    def _make_script(self, entry, filenames, options=None):
+        post_interp = b''
+        if options:
+            args = options.get('interpreter_args', [])
+            if args:
+                args = ' %s' % ' '.join(args)
+                post_interp = args.encode('utf-8')
+        shebang = self._get_shebang('utf-8', post_interp, options=options)
+        script = self._get_script_text(entry).encode('utf-8')
+        name = entry.name
+        scriptnames = set()
+        if '' in self.variants:
+            scriptnames.add(name)
+        if 'X' in self.variants:
+            scriptnames.add('%s%s' % (name, sys.version[0]))
+        if 'X.Y' in self.variants:
+            scriptnames.add('%s-%s' % (name, sys.version[:3]))
+        if options and options.get('gui', False):
+            ext = 'pyw'
+        else:
+            ext = 'py'
+        self._write_script(scriptnames, shebang, script, filenames, ext)
+
+    def _copy_script(self, script, filenames):
+        adjust = False
+        script = os.path.join(self.source_dir, convert_path(script))
+        outname = os.path.join(self.target_dir, os.path.basename(script))
+        if not self.force and not self._fileop.newer(script, outname):
+            logger.debug('not copying %s (up-to-date)', script)
+            return
+
+        # Always open the file, but ignore failures in dry-run mode --
+        # that way, we'll get accurate feedback if we can read the
+        # script.
+        try:
+            f = open(script, 'rb')
+        except IOError:  # pragma: no cover
+            if not self.dry_run:
+                raise
+            f = None
+        else:
+            first_line = f.readline()
+            if not first_line:  # pragma: no cover
+                logger.warning('%s: %s is an empty file (skipping)',
+                               self.get_command_name(),  script)
+                return
+
+            match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
+            if match:
+                adjust = True
+                post_interp = match.group(1) or b''
+
+        if not adjust:
+            if f:
+                f.close()
+            self._fileop.copy_file(script, outname)
+            if self.set_mode:
+                self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+        else:
+            logger.info('copying and adjusting %s -> %s', script,
+                        self.target_dir)
+            if not self._fileop.dry_run:
+                encoding, lines = detect_encoding(f.readline)
+                f.seek(0)
+                shebang = self._get_shebang(encoding, post_interp)
+                if b'pythonw' in first_line:  # pragma: no cover
+                    ext = 'pyw'
+                else:
+                    ext = 'py'
+                n = os.path.basename(outname)
+                self._write_script([n], shebang, f.read(), filenames, ext)
+            if f:
+                f.close()
+
+    @property
+    def dry_run(self):
+        return self._fileop.dry_run
+
+    @dry_run.setter
+    def dry_run(self, value):
+        self._fileop.dry_run = value
+
+    if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'):  # pragma: no cover
+        # Executable launcher support.
+        # Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
+
+        def _get_launcher(self, kind):
+            if struct.calcsize('P') == 8:   # 64-bit
+                bits = '64'
+            else:
+                bits = '32'
+            name = '%s%s.exe' % (kind, bits)
+            # Issue 31: don't hardcode an absolute package name, but
+            # determine it relative to the current package
+            distlib_package = __name__.rsplit('.', 1)[0]
+            result = finder(distlib_package).find(name).bytes
+            return result
+
+    # Public API follows
+
+    def make(self, specification, options=None):
+        """
+        Make a script.
+
+        :param specification: The specification, which is either a valid export
+                              entry specification (to make a script from a
+                              callable) or a filename (to make a script by
+                              copying from a source location).
+        :param options: A dictionary of options controlling script generation.
+        :return: A list of all absolute pathnames written to.
+        """
+        filenames = []
+        entry = get_export_entry(specification)
+        if entry is None:
+            self._copy_script(specification, filenames)
+        else:
+            self._make_script(entry, filenames, options=options)
+        return filenames
+
+    def make_multiple(self, specifications, options=None):
+        """
+        Take a list of specifications and make scripts from them,
+        :param specifications: A list of specifications.
+        :return: A list of all absolute pathnames written to,
+        """
+        filenames = []
+        for specification in specifications:
+            filenames.extend(self.make(specification, options))
+        return filenames
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t32.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t32.exe
new file mode 100644
index 00000000..5d5bce1f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t32.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t64.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t64.exe
new file mode 100644
index 00000000..039ce441
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/t64.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/util.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/util.py
new file mode 100644
index 00000000..e851146c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/util.py
@@ -0,0 +1,1760 @@
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import codecs
+from collections import deque
+import contextlib
+import csv
+from glob import iglob as std_iglob
+import io
+import json
+import logging
+import os
+import py_compile
+import re
+import socket
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+import subprocess
+import sys
+import tarfile
+import tempfile
+import textwrap
+
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import time
+
+from . import DistlibException
+from .compat import (string_types, text_type, shutil, raw_input, StringIO,
+                     cache_from_source, urlopen, urljoin, httplib, xmlrpclib,
+                     splittype, HTTPHandler, BaseConfigurator, valid_ident,
+                     Container, configparser, URLError, ZipFile, fsdecode,
+                     unquote, urlparse)
+
+logger = logging.getLogger(__name__)
+
+#
+# Requirement parsing code as per PEP 508
+#
+
+IDENTIFIER = re.compile(r'^([\w\.-]+)\s*')
+VERSION_IDENTIFIER = re.compile(r'^([\w\.*+-]+)\s*')
+COMPARE_OP = re.compile(r'^(<=?|>=?|={2,3}|[~!]=)\s*')
+MARKER_OP = re.compile(r'^((<=?)|(>=?)|={2,3}|[~!]=|in|not\s+in)\s*')
+OR = re.compile(r'^or\b\s*')
+AND = re.compile(r'^and\b\s*')
+NON_SPACE = re.compile(r'(\S+)\s*')
+STRING_CHUNK = re.compile(r'([\s\w\.{}()*+#:;,/?!~`@$%^&=|<>\[\]-]+)')
+
+
+def parse_marker(marker_string):
+    """
+    Parse a marker string and return a dictionary containing a marker expression.
+
+    The dictionary will contain keys "op", "lhs" and "rhs" for non-terminals in
+    the expression grammar, or strings. A string contained in quotes is to be
+    interpreted as a literal string, and a string not contained in quotes is a
+    variable (such as os_name).
+    """
+    def marker_var(remaining):
+        # either identifier, or literal string
+        m = IDENTIFIER.match(remaining)
+        if m:
+            result = m.groups()[0]
+            remaining = remaining[m.end():]
+        elif not remaining:
+            raise SyntaxError('unexpected end of input')
+        else:
+            q = remaining[0]
+            if q not in '\'"':
+                raise SyntaxError('invalid expression: %s' % remaining)
+            oq = '\'"'.replace(q, '')
+            remaining = remaining[1:]
+            parts = [q]
+            while remaining:
+                # either a string chunk, or oq, or q to terminate
+                if remaining[0] == q:
+                    break
+                elif remaining[0] == oq:
+                    parts.append(oq)
+                    remaining = remaining[1:]
+                else:
+                    m = STRING_CHUNK.match(remaining)
+                    if not m:
+                        raise SyntaxError('error in string literal: %s' % remaining)
+                    parts.append(m.groups()[0])
+                    remaining = remaining[m.end():]
+            else:
+                s = ''.join(parts)
+                raise SyntaxError('unterminated string: %s' % s)
+            parts.append(q)
+            result = ''.join(parts)
+            remaining = remaining[1:].lstrip() # skip past closing quote
+        return result, remaining
+
+    def marker_expr(remaining):
+        if remaining and remaining[0] == '(':
+            result, remaining = marker(remaining[1:].lstrip())
+            if remaining[0] != ')':
+                raise SyntaxError('unterminated parenthesis: %s' % remaining)
+            remaining = remaining[1:].lstrip()
+        else:
+            lhs, remaining = marker_var(remaining)
+            while remaining:
+                m = MARKER_OP.match(remaining)
+                if not m:
+                    break
+                op = m.groups()[0]
+                remaining = remaining[m.end():]
+                rhs, remaining = marker_var(remaining)
+                lhs = {'op': op, 'lhs': lhs, 'rhs': rhs}
+            result = lhs
+        return result, remaining
+
+    def marker_and(remaining):
+        lhs, remaining = marker_expr(remaining)
+        while remaining:
+            m = AND.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_expr(remaining)
+            lhs = {'op': 'and', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    def marker(remaining):
+        lhs, remaining = marker_and(remaining)
+        while remaining:
+            m = OR.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_and(remaining)
+            lhs = {'op': 'or', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    return marker(marker_string)
+
+
+def parse_requirement(req):
+    """
+    Parse a requirement passed in as a string. Return a Container
+    whose attributes contain the various parts of the requirement.
+    """
+    remaining = req.strip()
+    if not remaining or remaining.startswith('#'):
+        return None
+    m = IDENTIFIER.match(remaining)
+    if not m:
+        raise SyntaxError('name expected: %s' % remaining)
+    distname = m.groups()[0]
+    remaining = remaining[m.end():]
+    extras = mark_expr = versions = uri = None
+    if remaining and remaining[0] == '[':
+        i = remaining.find(']', 1)
+        if i < 0:
+            raise SyntaxError('unterminated extra: %s' % remaining)
+        s = remaining[1:i]
+        remaining = remaining[i + 1:].lstrip()
+        extras = []
+        while s:
+            m = IDENTIFIER.match(s)
+            if not m:
+                raise SyntaxError('malformed extra: %s' % s)
+            extras.append(m.groups()[0])
+            s = s[m.end():]
+            if not s:
+                break
+            if s[0] != ',':
+                raise SyntaxError('comma expected in extras: %s' % s)
+            s = s[1:].lstrip()
+        if not extras:
+            extras = None
+    if remaining:
+        if remaining[0] == '@':
+            # it's a URI
+            remaining = remaining[1:].lstrip()
+            m = NON_SPACE.match(remaining)
+            if not m:
+                raise SyntaxError('invalid URI: %s' % remaining)
+            uri = m.groups()[0]
+            t = urlparse(uri)
+            # there are issues with Python and URL parsing, so this test
+            # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
+            # always parse invalid URLs correctly - it should raise
+            # exceptions for malformed URLs
+            if not (t.scheme and t.netloc):
+                raise SyntaxError('Invalid URL: %s' % uri)
+            remaining = remaining[m.end():].lstrip()
+        else:
+
+            def get_versions(ver_remaining):
+                """
+                Return a list of operator, version tuples if any are
+                specified, else None.
+                """
+                m = COMPARE_OP.match(ver_remaining)
+                versions = None
+                if m:
+                    versions = []
+                    while True:
+                        op = m.groups()[0]
+                        ver_remaining = ver_remaining[m.end():]
+                        m = VERSION_IDENTIFIER.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid version: %s' % ver_remaining)
+                        v = m.groups()[0]
+                        versions.append((op, v))
+                        ver_remaining = ver_remaining[m.end():]
+                        if not ver_remaining or ver_remaining[0] != ',':
+                            break
+                        ver_remaining = ver_remaining[1:].lstrip()
+                        m = COMPARE_OP.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid constraint: %s' % ver_remaining)
+                    if not versions:
+                        versions = None
+                return versions, ver_remaining
+
+            if remaining[0] != '(':
+                versions, remaining = get_versions(remaining)
+            else:
+                i = remaining.find(')', 1)
+                if i < 0:
+                    raise SyntaxError('unterminated parenthesis: %s' % remaining)
+                s = remaining[1:i]
+                remaining = remaining[i + 1:].lstrip()
+                # As a special diversion from PEP 508, allow a version number
+                # a.b.c in parentheses as a synonym for ~= a.b.c (because this
+                # is allowed in earlier PEPs)
+                if COMPARE_OP.match(s):
+                    versions, _ = get_versions(s)
+                else:
+                    m = VERSION_IDENTIFIER.match(s)
+                    if not m:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    v = m.groups()[0]
+                    s = s[m.end():].lstrip()
+                    if s:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    versions = [('~=', v)]
+
+    if remaining:
+        if remaining[0] != ';':
+            raise SyntaxError('invalid requirement: %s' % remaining)
+        remaining = remaining[1:].lstrip()
+
+        mark_expr, remaining = parse_marker(remaining)
+
+    if remaining and remaining[0] != '#':
+        raise SyntaxError('unexpected trailing data: %s' % remaining)
+
+    if not versions:
+        rs = distname
+    else:
+        rs = '%s %s' % (distname, ', '.join(['%s %s' % con for con in versions]))
+    return Container(name=distname, extras=extras, constraints=versions,
+                     marker=mark_expr, url=uri, requirement=rs)
+
+
+def get_resources_dests(resources_root, rules):
+    """Find destinations for resources files"""
+
+    def get_rel_path(root, path):
+        # normalizes and returns a lstripped-/-separated path
+        root = root.replace(os.path.sep, '/')
+        path = path.replace(os.path.sep, '/')
+        assert path.startswith(root)
+        return path[len(root):].lstrip('/')
+
+    destinations = {}
+    for base, suffix, dest in rules:
+        prefix = os.path.join(resources_root, base)
+        for abs_base in iglob(prefix):
+            abs_glob = os.path.join(abs_base, suffix)
+            for abs_path in iglob(abs_glob):
+                resource_file = get_rel_path(resources_root, abs_path)
+                if dest is None:  # remove the entry if it was here
+                    destinations.pop(resource_file, None)
+                else:
+                    rel_path = get_rel_path(abs_base, abs_path)
+                    rel_dest = dest.replace(os.path.sep, '/').rstrip('/')
+                    destinations[resource_file] = rel_dest + '/' + rel_path
+    return destinations
+
+
+def in_venv():
+    if hasattr(sys, 'real_prefix'):
+        # virtualenv venvs
+        result = True
+    else:
+        # PEP 405 venvs
+        result = sys.prefix != getattr(sys, 'base_prefix', sys.prefix)
+    return result
+
+
+def get_executable():
+# The __PYVENV_LAUNCHER__ dance is apparently no longer needed, as
+# changes to the stub launcher mean that sys.executable always points
+# to the stub on OS X
+#    if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
+#                                     in os.environ):
+#        result =  os.environ['__PYVENV_LAUNCHER__']
+#    else:
+#        result = sys.executable
+#    return result
+    result = os.path.normcase(sys.executable)
+    if not isinstance(result, text_type):
+        result = fsdecode(result)
+    return result
+
+
+def proceed(prompt, allowed_chars, error_prompt=None, default=None):
+    p = prompt
+    while True:
+        s = raw_input(p)
+        p = prompt
+        if not s and default:
+            s = default
+        if s:
+            c = s[0].lower()
+            if c in allowed_chars:
+                break
+            if error_prompt:
+                p = '%c: %s\n%s' % (c, error_prompt, prompt)
+    return c
+
+
+def extract_by_key(d, keys):
+    if isinstance(keys, string_types):
+        keys = keys.split()
+    result = {}
+    for key in keys:
+        if key in d:
+            result[key] = d[key]
+    return result
+
+def read_exports(stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getreader('utf-8')(stream)
+    # Try to load as JSON, falling back on legacy format
+    data = stream.read()
+    stream = StringIO(data)
+    try:
+        jdata = json.load(stream)
+        result = jdata['extensions']['python.exports']['exports']
+        for group, entries in result.items():
+            for k, v in entries.items():
+                s = '%s = %s' % (k, v)
+                entry = get_export_entry(s)
+                assert entry is not None
+                entries[k] = entry
+        return result
+    except Exception:
+        stream.seek(0, 0)
+
+    def read_stream(cp, stream):
+        if hasattr(cp, 'read_file'):
+            cp.read_file(stream)
+        else:
+            cp.readfp(stream)
+
+    cp = configparser.ConfigParser()
+    try:
+        read_stream(cp, stream)
+    except configparser.MissingSectionHeaderError:
+        stream.close()
+        data = textwrap.dedent(data)
+        stream = StringIO(data)
+        read_stream(cp, stream)
+
+    result = {}
+    for key in cp.sections():
+        result[key] = entries = {}
+        for name, value in cp.items(key):
+            s = '%s = %s' % (name, value)
+            entry = get_export_entry(s)
+            assert entry is not None
+            #entry.dist = self
+            entries[name] = entry
+    return result
+
+
+def write_exports(exports, stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getwriter('utf-8')(stream)
+    cp = configparser.ConfigParser()
+    for k, v in exports.items():
+        # TODO check k, v for valid values
+        cp.add_section(k)
+        for entry in v.values():
+            if entry.suffix is None:
+                s = entry.prefix
+            else:
+                s = '%s:%s' % (entry.prefix, entry.suffix)
+            if entry.flags:
+                s = '%s [%s]' % (s, ', '.join(entry.flags))
+            cp.set(k, entry.name, s)
+    cp.write(stream)
+
+
+@contextlib.contextmanager
+def tempdir():
+    td = tempfile.mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+@contextlib.contextmanager
+def chdir(d):
+    cwd = os.getcwd()
+    try:
+        os.chdir(d)
+        yield
+    finally:
+        os.chdir(cwd)
+
+
+@contextlib.contextmanager
+def socket_timeout(seconds=15):
+    cto = socket.getdefaulttimeout()
+    try:
+        socket.setdefaulttimeout(seconds)
+        yield
+    finally:
+        socket.setdefaulttimeout(cto)
+
+
+class cached_property(object):
+    def __init__(self, func):
+        self.func = func
+        #for attr in ('__name__', '__module__', '__doc__'):
+        #    setattr(self, attr, getattr(func, attr, None))
+
+    def __get__(self, obj, cls=None):
+        if obj is None:
+            return self
+        value = self.func(obj)
+        object.__setattr__(obj, self.func.__name__, value)
+        #obj.__dict__[self.func.__name__] = value = self.func(obj)
+        return value
+
+def convert_path(pathname):
+    """Return 'pathname' as a name that will work on the native filesystem.
+
+    The path is split on '/' and put back together again using the current
+    directory separator.  Needed because filenames in the setup script are
+    always supplied in Unix style, and have to be converted to the local
+    convention before we can actually use them in the filesystem.  Raises
+    ValueError on non-Unix-ish systems if 'pathname' either starts or
+    ends with a slash.
+    """
+    if os.sep == '/':
+        return pathname
+    if not pathname:
+        return pathname
+    if pathname[0] == '/':
+        raise ValueError("path '%s' cannot be absolute" % pathname)
+    if pathname[-1] == '/':
+        raise ValueError("path '%s' cannot end with '/'" % pathname)
+
+    paths = pathname.split('/')
+    while os.curdir in paths:
+        paths.remove(os.curdir)
+    if not paths:
+        return os.curdir
+    return os.path.join(*paths)
+
+
+class FileOperator(object):
+    def __init__(self, dry_run=False):
+        self.dry_run = dry_run
+        self.ensured = set()
+        self._init_record()
+
+    def _init_record(self):
+        self.record = False
+        self.files_written = set()
+        self.dirs_created = set()
+
+    def record_as_written(self, path):
+        if self.record:
+            self.files_written.add(path)
+
+    def newer(self, source, target):
+        """Tell if the target is newer than the source.
+
+        Returns true if 'source' exists and is more recently modified than
+        'target', or if 'source' exists and 'target' doesn't.
+
+        Returns false if both exist and 'target' is the same age or younger
+        than 'source'. Raise PackagingFileError if 'source' does not exist.
+
+        Note that this test is not very accurate: files created in the same
+        second will have the same "age".
+        """
+        if not os.path.exists(source):
+            raise DistlibException("file '%r' does not exist" %
+                                   os.path.abspath(source))
+        if not os.path.exists(target):
+            return True
+
+        return os.stat(source).st_mtime > os.stat(target).st_mtime
+
+    def copy_file(self, infile, outfile, check=True):
+        """Copy a file respecting dry-run and force flags.
+        """
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying %s to %s', infile, outfile)
+        if not self.dry_run:
+            msg = None
+            if check:
+                if os.path.islink(outfile):
+                    msg = '%s is a symlink' % outfile
+                elif os.path.exists(outfile) and not os.path.isfile(outfile):
+                    msg = '%s is a non-regular file' % outfile
+            if msg:
+                raise ValueError(msg + ' which would be overwritten')
+            shutil.copyfile(infile, outfile)
+        self.record_as_written(outfile)
+
+    def copy_stream(self, instream, outfile, encoding=None):
+        assert not os.path.isdir(outfile)
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying stream %s to %s', instream, outfile)
+        if not self.dry_run:
+            if encoding is None:
+                outstream = open(outfile, 'wb')
+            else:
+                outstream = codecs.open(outfile, 'w', encoding=encoding)
+            try:
+                shutil.copyfileobj(instream, outstream)
+            finally:
+                outstream.close()
+        self.record_as_written(outfile)
+
+    def write_binary_file(self, path, data):
+        self.ensure_dir(os.path.dirname(path))
+        if not self.dry_run:
+            if os.path.exists(path):
+                os.remove(path)
+            with open(path, 'wb') as f:
+                f.write(data)
+        self.record_as_written(path)
+
+    def write_text_file(self, path, data, encoding):
+        self.write_binary_file(path, data.encode(encoding))
+
+    def set_mode(self, bits, mask, files):
+        if os.name == 'posix' or (os.name == 'java' and os._name == 'posix'):
+            # Set the executable bits (owner, group, and world) on
+            # all the files specified.
+            for f in files:
+                if self.dry_run:
+                    logger.info("changing mode of %s", f)
+                else:
+                    mode = (os.stat(f).st_mode | bits) & mask
+                    logger.info("changing mode of %s to %o", f, mode)
+                    os.chmod(f, mode)
+
+    set_executable_mode = lambda s, f: s.set_mode(0o555, 0o7777, f)
+
+    def ensure_dir(self, path):
+        path = os.path.abspath(path)
+        if path not in self.ensured and not os.path.exists(path):
+            self.ensured.add(path)
+            d, f = os.path.split(path)
+            self.ensure_dir(d)
+            logger.info('Creating %s' % path)
+            if not self.dry_run:
+                os.mkdir(path)
+            if self.record:
+                self.dirs_created.add(path)
+
+    def byte_compile(self, path, optimize=False, force=False, prefix=None, hashed_invalidation=False):
+        dpath = cache_from_source(path, not optimize)
+        logger.info('Byte-compiling %s to %s', path, dpath)
+        if not self.dry_run:
+            if force or self.newer(path, dpath):
+                if not prefix:
+                    diagpath = None
+                else:
+                    assert path.startswith(prefix)
+                    diagpath = path[len(prefix):]
+            compile_kwargs = {}
+            if hashed_invalidation and hasattr(py_compile, 'PycInvalidationMode'):
+                compile_kwargs['invalidation_mode'] = py_compile.PycInvalidationMode.CHECKED_HASH
+            py_compile.compile(path, dpath, diagpath, True, **compile_kwargs)     # raise error
+        self.record_as_written(dpath)
+        return dpath
+
+    def ensure_removed(self, path):
+        if os.path.exists(path):
+            if os.path.isdir(path) and not os.path.islink(path):
+                logger.debug('Removing directory tree at %s', path)
+                if not self.dry_run:
+                    shutil.rmtree(path)
+                if self.record:
+                    if path in self.dirs_created:
+                        self.dirs_created.remove(path)
+            else:
+                if os.path.islink(path):
+                    s = 'link'
+                else:
+                    s = 'file'
+                logger.debug('Removing %s %s', s, path)
+                if not self.dry_run:
+                    os.remove(path)
+                if self.record:
+                    if path in self.files_written:
+                        self.files_written.remove(path)
+
+    def is_writable(self, path):
+        result = False
+        while not result:
+            if os.path.exists(path):
+                result = os.access(path, os.W_OK)
+                break
+            parent = os.path.dirname(path)
+            if parent == path:
+                break
+            path = parent
+        return result
+
+    def commit(self):
+        """
+        Commit recorded changes, turn off recording, return
+        changes.
+        """
+        assert self.record
+        result = self.files_written, self.dirs_created
+        self._init_record()
+        return result
+
+    def rollback(self):
+        if not self.dry_run:
+            for f in list(self.files_written):
+                if os.path.exists(f):
+                    os.remove(f)
+            # dirs should all be empty now, except perhaps for
+            # __pycache__ subdirs
+            # reverse so that subdirs appear before their parents
+            dirs = sorted(self.dirs_created, reverse=True)
+            for d in dirs:
+                flist = os.listdir(d)
+                if flist:
+                    assert flist == ['__pycache__']
+                    sd = os.path.join(d, flist[0])
+                    os.rmdir(sd)
+                os.rmdir(d)     # should fail if non-empty
+        self._init_record()
+
+def resolve(module_name, dotted_path):
+    if module_name in sys.modules:
+        mod = sys.modules[module_name]
+    else:
+        mod = __import__(module_name)
+    if dotted_path is None:
+        result = mod
+    else:
+        parts = dotted_path.split('.')
+        result = getattr(mod, parts.pop(0))
+        for p in parts:
+            result = getattr(result, p)
+    return result
+
+
+class ExportEntry(object):
+    def __init__(self, name, prefix, suffix, flags):
+        self.name = name
+        self.prefix = prefix
+        self.suffix = suffix
+        self.flags = flags
+
+    @cached_property
+    def value(self):
+        return resolve(self.prefix, self.suffix)
+
+    def __repr__(self):  # pragma: no cover
+        return '<ExportEntry %s = %s:%s %s>' % (self.name, self.prefix,
+                                                self.suffix, self.flags)
+
+    def __eq__(self, other):
+        if not isinstance(other, ExportEntry):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.prefix == other.prefix and
+                      self.suffix == other.suffix and
+                      self.flags == other.flags)
+        return result
+
+    __hash__ = object.__hash__
+
+
+ENTRY_RE = re.compile(r'''(?P<name>(\w|[-.+])+)
+                      \s*=\s*(?P<callable>(\w+)([:\.]\w+)*)
+                      \s*(\[\s*(?P<flags>\w+(=\w+)?(,\s*\w+(=\w+)?)*)\s*\])?
+                      ''', re.VERBOSE)
+
+def get_export_entry(specification):
+    m = ENTRY_RE.search(specification)
+    if not m:
+        result = None
+        if '[' in specification or ']' in specification:
+            raise DistlibException("Invalid specification "
+                                   "'%s'" % specification)
+    else:
+        d = m.groupdict()
+        name = d['name']
+        path = d['callable']
+        colons = path.count(':')
+        if colons == 0:
+            prefix, suffix = path, None
+        else:
+            if colons != 1:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            prefix, suffix = path.split(':')
+        flags = d['flags']
+        if flags is None:
+            if '[' in specification or ']' in specification:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            flags = []
+        else:
+            flags = [f.strip() for f in flags.split(',')]
+        result = ExportEntry(name, prefix, suffix, flags)
+    return result
+
+
+def get_cache_base(suffix=None):
+    """
+    Return the default base location for distlib caches. If the directory does
+    not exist, it is created. Use the suffix provided for the base directory,
+    and default to '.distlib' if it isn't provided.
+
+    On Windows, if LOCALAPPDATA is defined in the environment, then it is
+    assumed to be a directory, and will be the parent directory of the result.
+    On POSIX, and on Windows if LOCALAPPDATA is not defined, the user's home
+    directory - using os.expanduser('~') - will be the parent directory of
+    the result.
+
+    The result is just the directory '.distlib' in the parent directory as
+    determined above, or with the name specified with ``suffix``.
+    """
+    if suffix is None:
+        suffix = '.distlib'
+    if os.name == 'nt' and 'LOCALAPPDATA' in os.environ:
+        result = os.path.expandvars('$localappdata')
+    else:
+        # Assume posix, or old Windows
+        result = os.path.expanduser('~')
+    # we use 'isdir' instead of 'exists', because we want to
+    # fail if there's a file with that name
+    if os.path.isdir(result):
+        usable = os.access(result, os.W_OK)
+        if not usable:
+            logger.warning('Directory exists but is not writable: %s', result)
+    else:
+        try:
+            os.makedirs(result)
+            usable = True
+        except OSError:
+            logger.warning('Unable to create %s', result, exc_info=True)
+            usable = False
+    if not usable:
+        result = tempfile.mkdtemp()
+        logger.warning('Default location unusable, using %s', result)
+    return os.path.join(result, suffix)
+
+
+def path_to_cache_dir(path):
+    """
+    Convert an absolute path to a directory name for use in a cache.
+
+    The algorithm used is:
+
+    #. On Windows, any ``':'`` in the drive is replaced with ``'---'``.
+    #. Any occurrence of ``os.sep`` is replaced with ``'--'``.
+    #. ``'.cache'`` is appended.
+    """
+    d, p = os.path.splitdrive(os.path.abspath(path))
+    if d:
+        d = d.replace(':', '---')
+    p = p.replace(os.sep, '--')
+    return d + p + '.cache'
+
+
+def ensure_slash(s):
+    if not s.endswith('/'):
+        return s + '/'
+    return s
+
+
+def parse_credentials(netloc):
+    username = password = None
+    if '@' in netloc:
+        prefix, netloc = netloc.rsplit('@', 1)
+        if ':' not in prefix:
+            username = prefix
+        else:
+            username, password = prefix.split(':', 1)
+    if username:
+        username = unquote(username)
+    if password:
+        password = unquote(password)
+    return username, password, netloc
+
+
+def get_process_umask():
+    result = os.umask(0o22)
+    os.umask(result)
+    return result
+
+def is_string_sequence(seq):
+    result = True
+    i = None
+    for i, s in enumerate(seq):
+        if not isinstance(s, string_types):
+            result = False
+            break
+    assert i is not None
+    return result
+
+PROJECT_NAME_AND_VERSION = re.compile('([a-z0-9_]+([.-][a-z_][a-z0-9_]*)*)-'
+                                      '([a-z0-9_.+-]+)', re.I)
+PYTHON_VERSION = re.compile(r'-py(\d\.?\d?)')
+
+
+def split_filename(filename, project_name=None):
+    """
+    Extract name, version, python version from a filename (no extension)
+
+    Return name, version, pyver or None
+    """
+    result = None
+    pyver = None
+    filename = unquote(filename).replace(' ', '-')
+    m = PYTHON_VERSION.search(filename)
+    if m:
+        pyver = m.group(1)
+        filename = filename[:m.start()]
+    if project_name and len(filename) > len(project_name) + 1:
+        m = re.match(re.escape(project_name) + r'\b', filename)
+        if m:
+            n = m.end()
+            result = filename[:n], filename[n + 1:], pyver
+    if result is None:
+        m = PROJECT_NAME_AND_VERSION.match(filename)
+        if m:
+            result = m.group(1), m.group(3), pyver
+    return result
+
+# Allow spaces in name because of legacy dists like "Twisted Core"
+NAME_VERSION_RE = re.compile(r'(?P<name>[\w .-]+)\s*'
+                             r'\(\s*(?P<ver>[^\s)]+)\)$')
+
+def parse_name_and_version(p):
+    """
+    A utility method used to get name and version from a string.
+
+    From e.g. a Provides-Dist value.
+
+    :param p: A value in a form 'foo (1.0)'
+    :return: The name and version as a tuple.
+    """
+    m = NAME_VERSION_RE.match(p)
+    if not m:
+        raise DistlibException('Ill-formed name/version string: \'%s\'' % p)
+    d = m.groupdict()
+    return d['name'].strip().lower(), d['ver']
+
+def get_extras(requested, available):
+    result = set()
+    requested = set(requested or [])
+    available = set(available or [])
+    if '*' in requested:
+        requested.remove('*')
+        result |= available
+    for r in requested:
+        if r == '-':
+            result.add(r)
+        elif r.startswith('-'):
+            unwanted = r[1:]
+            if unwanted not in available:
+                logger.warning('undeclared extra: %s' % unwanted)
+            if unwanted in result:
+                result.remove(unwanted)
+        else:
+            if r not in available:
+                logger.warning('undeclared extra: %s' % r)
+            result.add(r)
+    return result
+#
+# Extended metadata functionality
+#
+
+def _get_external_data(url):
+    result = {}
+    try:
+        # urlopen might fail if it runs into redirections,
+        # because of Python issue #13696. Fixed in locators
+        # using a custom redirect handler.
+        resp = urlopen(url)
+        headers = resp.info()
+        ct = headers.get('Content-Type')
+        if not ct.startswith('application/json'):
+            logger.debug('Unexpected response for JSON request: %s', ct)
+        else:
+            reader = codecs.getreader('utf-8')(resp)
+            #data = reader.read().decode('utf-8')
+            #result = json.loads(data)
+            result = json.load(reader)
+    except Exception as e:
+        logger.exception('Failed to get external data for %s: %s', url, e)
+    return result
+
+_external_data_base_url = 'https://www.red-dove.com/pypi/projects/'
+
+def get_project_data(name):
+    url = '%s/%s/project.json' % (name[0].upper(), name)
+    url = urljoin(_external_data_base_url, url)
+    result = _get_external_data(url)
+    return result
+
+def get_package_data(name, version):
+    url = '%s/%s/package-%s.json' % (name[0].upper(), name, version)
+    url = urljoin(_external_data_base_url, url)
+    return _get_external_data(url)
+
+
+class Cache(object):
+    """
+    A class implementing a cache for resources that need to live in the file system
+    e.g. shared libraries. This class was moved from resources to here because it
+    could be used by other modules, e.g. the wheel module.
+    """
+
+    def __init__(self, base):
+        """
+        Initialise an instance.
+
+        :param base: The base directory where the cache should be located.
+        """
+        # we use 'isdir' instead of 'exists', because we want to
+        # fail if there's a file with that name
+        if not os.path.isdir(base):  # pragma: no cover
+            os.makedirs(base)
+        if (os.stat(base).st_mode & 0o77) != 0:
+            logger.warning('Directory \'%s\' is not private', base)
+        self.base = os.path.abspath(os.path.normpath(base))
+
+    def prefix_to_dir(self, prefix):
+        """
+        Converts a resource prefix to a directory name in the cache.
+        """
+        return path_to_cache_dir(prefix)
+
+    def clear(self):
+        """
+        Clear the cache.
+        """
+        not_removed = []
+        for fn in os.listdir(self.base):
+            fn = os.path.join(self.base, fn)
+            try:
+                if os.path.islink(fn) or os.path.isfile(fn):
+                    os.remove(fn)
+                elif os.path.isdir(fn):
+                    shutil.rmtree(fn)
+            except Exception:
+                not_removed.append(fn)
+        return not_removed
+
+
+class EventMixin(object):
+    """
+    A very simple publish/subscribe system.
+    """
+    def __init__(self):
+        self._subscribers = {}
+
+    def add(self, event, subscriber, append=True):
+        """
+        Add a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be added (and called when the
+                           event is published).
+        :param append: Whether to append or prepend the subscriber to an
+                       existing subscriber list for the event.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            subs[event] = deque([subscriber])
+        else:
+            sq = subs[event]
+            if append:
+                sq.append(subscriber)
+            else:
+                sq.appendleft(subscriber)
+
+    def remove(self, event, subscriber):
+        """
+        Remove a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be removed.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            raise ValueError('No subscribers: %r' % event)
+        subs[event].remove(subscriber)
+
+    def get_subscribers(self, event):
+        """
+        Return an iterator for the subscribers for an event.
+        :param event: The event to return subscribers for.
+        """
+        return iter(self._subscribers.get(event, ()))
+
+    def publish(self, event, *args, **kwargs):
+        """
+        Publish a event and return a list of values returned by its
+        subscribers.
+
+        :param event: The event to publish.
+        :param args: The positional arguments to pass to the event's
+                     subscribers.
+        :param kwargs: The keyword arguments to pass to the event's
+                       subscribers.
+        """
+        result = []
+        for subscriber in self.get_subscribers(event):
+            try:
+                value = subscriber(event, *args, **kwargs)
+            except Exception:
+                logger.exception('Exception during event publication')
+                value = None
+            result.append(value)
+        logger.debug('publish %s: args = %s, kwargs = %s, result = %s',
+                     event, args, kwargs, result)
+        return result
+
+#
+# Simple sequencing
+#
+class Sequencer(object):
+    def __init__(self):
+        self._preds = {}
+        self._succs = {}
+        self._nodes = set()     # nodes with no preds/succs
+
+    def add_node(self, node):
+        self._nodes.add(node)
+
+    def remove_node(self, node, edges=False):
+        if node in self._nodes:
+            self._nodes.remove(node)
+        if edges:
+            for p in set(self._preds.get(node, ())):
+                self.remove(p, node)
+            for s in set(self._succs.get(node, ())):
+                self.remove(node, s)
+            # Remove empties
+            for k, v in list(self._preds.items()):
+                if not v:
+                    del self._preds[k]
+            for k, v in list(self._succs.items()):
+                if not v:
+                    del self._succs[k]
+
+    def add(self, pred, succ):
+        assert pred != succ
+        self._preds.setdefault(succ, set()).add(pred)
+        self._succs.setdefault(pred, set()).add(succ)
+
+    def remove(self, pred, succ):
+        assert pred != succ
+        try:
+            preds = self._preds[succ]
+            succs = self._succs[pred]
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of anything' % succ)
+        try:
+            preds.remove(pred)
+            succs.remove(succ)
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of %r' % (succ, pred))
+
+    def is_step(self, step):
+        return (step in self._preds or step in self._succs or
+                step in self._nodes)
+
+    def get_steps(self, final):
+        if not self.is_step(final):
+            raise ValueError('Unknown: %r' % final)
+        result = []
+        todo = []
+        seen = set()
+        todo.append(final)
+        while todo:
+            step = todo.pop(0)
+            if step in seen:
+                # if a step was already seen,
+                # move it to the end (so it will appear earlier
+                # when reversed on return) ... but not for the
+                # final step, as that would be confusing for
+                # users
+                if step != final:
+                    result.remove(step)
+                    result.append(step)
+            else:
+                seen.add(step)
+                result.append(step)
+                preds = self._preds.get(step, ())
+                todo.extend(preds)
+        return reversed(result)
+
+    @property
+    def strong_connections(self):
+        #http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
+        index_counter = [0]
+        stack = []
+        lowlinks = {}
+        index = {}
+        result = []
+
+        graph = self._succs
+
+        def strongconnect(node):
+            # set the depth index for this node to the smallest unused index
+            index[node] = index_counter[0]
+            lowlinks[node] = index_counter[0]
+            index_counter[0] += 1
+            stack.append(node)
+
+            # Consider successors
+            try:
+                successors = graph[node]
+            except Exception:
+                successors = []
+            for successor in successors:
+                if successor not in lowlinks:
+                    # Successor has not yet been visited
+                    strongconnect(successor)
+                    lowlinks[node] = min(lowlinks[node],lowlinks[successor])
+                elif successor in stack:
+                    # the successor is in the stack and hence in the current
+                    # strongly connected component (SCC)
+                    lowlinks[node] = min(lowlinks[node],index[successor])
+
+            # If `node` is a root node, pop the stack and generate an SCC
+            if lowlinks[node] == index[node]:
+                connected_component = []
+
+                while True:
+                    successor = stack.pop()
+                    connected_component.append(successor)
+                    if successor == node: break
+                component = tuple(connected_component)
+                # storing the result
+                result.append(component)
+
+        for node in graph:
+            if node not in lowlinks:
+                strongconnect(node)
+
+        return result
+
+    @property
+    def dot(self):
+        result = ['digraph G {']
+        for succ in self._preds:
+            preds = self._preds[succ]
+            for pred in preds:
+                result.append('  %s -> %s;' % (pred, succ))
+        for node in self._nodes:
+            result.append('  %s;' % node)
+        result.append('}')
+        return '\n'.join(result)
+
+#
+# Unarchiving functionality for zip, tar, tgz, tbz, whl
+#
+
+ARCHIVE_EXTENSIONS = ('.tar.gz', '.tar.bz2', '.tar', '.zip',
+                      '.tgz', '.tbz', '.whl')
+
+def unarchive(archive_filename, dest_dir, format=None, check=True):
+
+    def check_path(path):
+        if not isinstance(path, text_type):
+            path = path.decode('utf-8')
+        p = os.path.abspath(os.path.join(dest_dir, path))
+        if not p.startswith(dest_dir) or p[plen] != os.sep:
+            raise ValueError('path outside destination: %r' % p)
+
+    dest_dir = os.path.abspath(dest_dir)
+    plen = len(dest_dir)
+    archive = None
+    if format is None:
+        if archive_filename.endswith(('.zip', '.whl')):
+            format = 'zip'
+        elif archive_filename.endswith(('.tar.gz', '.tgz')):
+            format = 'tgz'
+            mode = 'r:gz'
+        elif archive_filename.endswith(('.tar.bz2', '.tbz')):
+            format = 'tbz'
+            mode = 'r:bz2'
+        elif archive_filename.endswith('.tar'):
+            format = 'tar'
+            mode = 'r'
+        else:  # pragma: no cover
+            raise ValueError('Unknown format for %r' % archive_filename)
+    try:
+        if format == 'zip':
+            archive = ZipFile(archive_filename, 'r')
+            if check:
+                names = archive.namelist()
+                for name in names:
+                    check_path(name)
+        else:
+            archive = tarfile.open(archive_filename, mode)
+            if check:
+                names = archive.getnames()
+                for name in names:
+                    check_path(name)
+        if format != 'zip' and sys.version_info[0] < 3:
+            # See Python issue 17153. If the dest path contains Unicode,
+            # tarfile extraction fails on Python 2.x if a member path name
+            # contains non-ASCII characters - it leads to an implicit
+            # bytes -> unicode conversion using ASCII to decode.
+            for tarinfo in archive.getmembers():
+                if not isinstance(tarinfo.name, text_type):
+                    tarinfo.name = tarinfo.name.decode('utf-8')
+        archive.extractall(dest_dir)
+
+    finally:
+        if archive:
+            archive.close()
+
+
+def zip_dir(directory):
+    """zip a directory tree into a BytesIO object"""
+    result = io.BytesIO()
+    dlen = len(directory)
+    with ZipFile(result, "w") as zf:
+        for root, dirs, files in os.walk(directory):
+            for name in files:
+                full = os.path.join(root, name)
+                rel = root[dlen:]
+                dest = os.path.join(rel, name)
+                zf.write(full, dest)
+    return result
+
+#
+# Simple progress bar
+#
+
+UNITS = ('', 'K', 'M', 'G','T','P')
+
+
+class Progress(object):
+    unknown = 'UNKNOWN'
+
+    def __init__(self, minval=0, maxval=100):
+        assert maxval is None or maxval >= minval
+        self.min = self.cur = minval
+        self.max = maxval
+        self.started = None
+        self.elapsed = 0
+        self.done = False
+
+    def update(self, curval):
+        assert self.min <= curval
+        assert self.max is None or curval <= self.max
+        self.cur = curval
+        now = time.time()
+        if self.started is None:
+            self.started = now
+        else:
+            self.elapsed = now - self.started
+
+    def increment(self, incr):
+        assert incr >= 0
+        self.update(self.cur + incr)
+
+    def start(self):
+        self.update(self.min)
+        return self
+
+    def stop(self):
+        if self.max is not None:
+            self.update(self.max)
+        self.done = True
+
+    @property
+    def maximum(self):
+        return self.unknown if self.max is None else self.max
+
+    @property
+    def percentage(self):
+        if self.done:
+            result = '100 %'
+        elif self.max is None:
+            result = ' ?? %'
+        else:
+            v = 100.0 * (self.cur - self.min) / (self.max - self.min)
+            result = '%3d %%' % v
+        return result
+
+    def format_duration(self, duration):
+        if (duration <= 0) and self.max is None or self.cur == self.min:
+            result = '??:??:??'
+        #elif duration < 1:
+        #    result = '--:--:--'
+        else:
+            result = time.strftime('%H:%M:%S', time.gmtime(duration))
+        return result
+
+    @property
+    def ETA(self):
+        if self.done:
+            prefix = 'Done'
+            t = self.elapsed
+            #import pdb; pdb.set_trace()
+        else:
+            prefix = 'ETA '
+            if self.max is None:
+                t = -1
+            elif self.elapsed == 0 or (self.cur == self.min):
+                t = 0
+            else:
+                #import pdb; pdb.set_trace()
+                t = float(self.max - self.min)
+                t /= self.cur - self.min
+                t = (t - 1) * self.elapsed
+        return '%s: %s' % (prefix, self.format_duration(t))
+
+    @property
+    def speed(self):
+        if self.elapsed == 0:
+            result = 0.0
+        else:
+            result = (self.cur - self.min) / self.elapsed
+        for unit in UNITS:
+            if result < 1000:
+                break
+            result /= 1000.0
+        return '%d %sB/s' % (result, unit)
+
+#
+# Glob functionality
+#
+
+RICH_GLOB = re.compile(r'\{([^}]*)\}')
+_CHECK_RECURSIVE_GLOB = re.compile(r'[^/\\,{]\*\*|\*\*[^/\\,}]')
+_CHECK_MISMATCH_SET = re.compile(r'^[^{]*\}|\{[^}]*$')
+
+
+def iglob(path_glob):
+    """Extended globbing function that supports ** and {opt1,opt2,opt3}."""
+    if _CHECK_RECURSIVE_GLOB.search(path_glob):
+        msg = """invalid glob %r: recursive glob "**" must be used alone"""
+        raise ValueError(msg % path_glob)
+    if _CHECK_MISMATCH_SET.search(path_glob):
+        msg = """invalid glob %r: mismatching set marker '{' or '}'"""
+        raise ValueError(msg % path_glob)
+    return _iglob(path_glob)
+
+
+def _iglob(path_glob):
+    rich_path_glob = RICH_GLOB.split(path_glob, 1)
+    if len(rich_path_glob) > 1:
+        assert len(rich_path_glob) == 3, rich_path_glob
+        prefix, set, suffix = rich_path_glob
+        for item in set.split(','):
+            for path in _iglob(''.join((prefix, item, suffix))):
+                yield path
+    else:
+        if '**' not in path_glob:
+            for item in std_iglob(path_glob):
+                yield item
+        else:
+            prefix, radical = path_glob.split('**', 1)
+            if prefix == '':
+                prefix = '.'
+            if radical == '':
+                radical = '*'
+            else:
+                # we support both
+                radical = radical.lstrip('/')
+                radical = radical.lstrip('\\')
+            for path, dir, files in os.walk(prefix):
+                path = os.path.normpath(path)
+                for fn in _iglob(os.path.join(path, radical)):
+                    yield fn
+
+if ssl:
+    from .compat import (HTTPSHandler as BaseHTTPSHandler, match_hostname,
+                         CertificateError)
+
+
+#
+# HTTPSConnection which verifies certificates/matches domains
+#
+
+    class HTTPSConnection(httplib.HTTPSConnection):
+        ca_certs = None # set this to the path to the certs file (.pem)
+        check_domain = True # only used if ca_certs is not None
+
+        # noinspection PyPropertyAccess
+        def connect(self):
+            sock = socket.create_connection((self.host, self.port), self.timeout)
+            if getattr(self, '_tunnel_host', False):
+                self.sock = sock
+                self._tunnel()
+
+            if not hasattr(ssl, 'SSLContext'):
+                # For 2.x
+                if self.ca_certs:
+                    cert_reqs = ssl.CERT_REQUIRED
+                else:
+                    cert_reqs = ssl.CERT_NONE
+                self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
+                                            cert_reqs=cert_reqs,
+                                            ssl_version=ssl.PROTOCOL_SSLv23,
+                                            ca_certs=self.ca_certs)
+            else:  # pragma: no cover
+                context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+                context.options |= ssl.OP_NO_SSLv2
+                if self.cert_file:
+                    context.load_cert_chain(self.cert_file, self.key_file)
+                kwargs = {}
+                if self.ca_certs:
+                    context.verify_mode = ssl.CERT_REQUIRED
+                    context.load_verify_locations(cafile=self.ca_certs)
+                    if getattr(ssl, 'HAS_SNI', False):
+                        kwargs['server_hostname'] = self.host
+                self.sock = context.wrap_socket(sock, **kwargs)
+            if self.ca_certs and self.check_domain:
+                try:
+                    match_hostname(self.sock.getpeercert(), self.host)
+                    logger.debug('Host verified: %s', self.host)
+                except CertificateError:  # pragma: no cover
+                    self.sock.shutdown(socket.SHUT_RDWR)
+                    self.sock.close()
+                    raise
+
+    class HTTPSHandler(BaseHTTPSHandler):
+        def __init__(self, ca_certs, check_domain=True):
+            BaseHTTPSHandler.__init__(self)
+            self.ca_certs = ca_certs
+            self.check_domain = check_domain
+
+        def _conn_maker(self, *args, **kwargs):
+            """
+            This is called to create a connection instance. Normally you'd
+            pass a connection class to do_open, but it doesn't actually check for
+            a class, and just expects a callable. As long as we behave just as a
+            constructor would have, we should be OK. If it ever changes so that
+            we *must* pass a class, we'll create an UnsafeHTTPSConnection class
+            which just sets check_domain to False in the class definition, and
+            choose which one to pass to do_open.
+            """
+            result = HTTPSConnection(*args, **kwargs)
+            if self.ca_certs:
+                result.ca_certs = self.ca_certs
+                result.check_domain = self.check_domain
+            return result
+
+        def https_open(self, req):
+            try:
+                return self.do_open(self._conn_maker, req)
+            except URLError as e:
+                if 'certificate verify failed' in str(e.reason):
+                    raise CertificateError('Unable to verify server certificate '
+                                           'for %s' % req.host)
+                else:
+                    raise
+
+    #
+    # To prevent against mixing HTTP traffic with HTTPS (examples: A Man-In-The-
+    # Middle proxy using HTTP listens on port 443, or an index mistakenly serves
+    # HTML containing a http://xyz link when it should be https://xyz),
+    # you can use the following handler class, which does not allow HTTP traffic.
+    #
+    # It works by inheriting from HTTPHandler - so build_opener won't add a
+    # handler for HTTP itself.
+    #
+    class HTTPSOnlyHandler(HTTPSHandler, HTTPHandler):
+        def http_open(self, req):
+            raise URLError('Unexpected HTTP request on what should be a secure '
+                           'connection: %s' % req)
+
+#
+# XML-RPC with timeouts
+#
+
+_ver_info = sys.version_info[:2]
+
+if _ver_info == (2, 6):
+    class HTTP(httplib.HTTP):
+        def __init__(self, host='', port=None, **kwargs):
+            if port == 0:   # 0 means use port 0, not the default port
+                port = None
+            self._setup(self._connection_class(host, port, **kwargs))
+
+
+    if ssl:
+        class HTTPS(httplib.HTTPS):
+            def __init__(self, host='', port=None, **kwargs):
+                if port == 0:   # 0 means use port 0, not the default port
+                    port = None
+                self._setup(self._connection_class(host, port, **kwargs))
+
+
+class Transport(xmlrpclib.Transport):
+    def __init__(self, timeout, use_datetime=0):
+        self.timeout = timeout
+        xmlrpclib.Transport.__init__(self, use_datetime)
+
+    def make_connection(self, host):
+        h, eh, x509 = self.get_host_info(host)
+        if _ver_info == (2, 6):
+            result = HTTP(h, timeout=self.timeout)
+        else:
+            if not self._connection or host != self._connection[0]:
+                self._extra_headers = eh
+                self._connection = host, httplib.HTTPConnection(h)
+            result = self._connection[1]
+        return result
+
+if ssl:
+    class SafeTransport(xmlrpclib.SafeTransport):
+        def __init__(self, timeout, use_datetime=0):
+            self.timeout = timeout
+            xmlrpclib.SafeTransport.__init__(self, use_datetime)
+
+        def make_connection(self, host):
+            h, eh, kwargs = self.get_host_info(host)
+            if not kwargs:
+                kwargs = {}
+            kwargs['timeout'] = self.timeout
+            if _ver_info == (2, 6):
+                result = HTTPS(host, None, **kwargs)
+            else:
+                if not self._connection or host != self._connection[0]:
+                    self._extra_headers = eh
+                    self._connection = host, httplib.HTTPSConnection(h, None,
+                                                                     **kwargs)
+                result = self._connection[1]
+            return result
+
+
+class ServerProxy(xmlrpclib.ServerProxy):
+    def __init__(self, uri, **kwargs):
+        self.timeout = timeout = kwargs.pop('timeout', None)
+        # The above classes only come into play if a timeout
+        # is specified
+        if timeout is not None:
+            scheme, _ = splittype(uri)
+            use_datetime = kwargs.get('use_datetime', 0)
+            if scheme == 'https':
+                tcls = SafeTransport
+            else:
+                tcls = Transport
+            kwargs['transport'] = t = tcls(timeout, use_datetime=use_datetime)
+            self.transport = t
+        xmlrpclib.ServerProxy.__init__(self, uri, **kwargs)
+
+#
+# CSV functionality. This is provided because on 2.x, the csv module can't
+# handle Unicode. However, we need to deal with Unicode in e.g. RECORD files.
+#
+
+def _csv_open(fn, mode, **kwargs):
+    if sys.version_info[0] < 3:
+        mode += 'b'
+    else:
+        kwargs['newline'] = ''
+        # Python 3 determines encoding from locale. Force 'utf-8'
+        # file encoding to match other forced utf-8 encoding
+        kwargs['encoding'] = 'utf-8'
+    return open(fn, mode, **kwargs)
+
+
+class CSVBase(object):
+    defaults = {
+        'delimiter': str(','),      # The strs are used because we need native
+        'quotechar': str('"'),      # str in the csv API (2.x won't take
+        'lineterminator': str('\n') # Unicode)
+    }
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc_info):
+        self.stream.close()
+
+
+class CSVReader(CSVBase):
+    def __init__(self, **kwargs):
+        if 'stream' in kwargs:
+            stream = kwargs['stream']
+            if sys.version_info[0] >= 3:
+                # needs to be a text stream
+                stream = codecs.getreader('utf-8')(stream)
+            self.stream = stream
+        else:
+            self.stream = _csv_open(kwargs['path'], 'r')
+        self.reader = csv.reader(self.stream, **self.defaults)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        result = next(self.reader)
+        if sys.version_info[0] < 3:
+            for i, item in enumerate(result):
+                if not isinstance(item, text_type):
+                    result[i] = item.decode('utf-8')
+        return result
+
+    __next__ = next
+
+class CSVWriter(CSVBase):
+    def __init__(self, fn, **kwargs):
+        self.stream = _csv_open(fn, 'w')
+        self.writer = csv.writer(self.stream, **self.defaults)
+
+    def writerow(self, row):
+        if sys.version_info[0] < 3:
+            r = []
+            for item in row:
+                if isinstance(item, text_type):
+                    item = item.encode('utf-8')
+                r.append(item)
+            row = r
+        self.writer.writerow(row)
+
+#
+#   Configurator functionality
+#
+
+class Configurator(BaseConfigurator):
+
+    value_converters = dict(BaseConfigurator.value_converters)
+    value_converters['inc'] = 'inc_convert'
+
+    def __init__(self, config, base=None):
+        super(Configurator, self).__init__(config)
+        self.base = base or os.getcwd()
+
+    def configure_custom(self, config):
+        def convert(o):
+            if isinstance(o, (list, tuple)):
+                result = type(o)([convert(i) for i in o])
+            elif isinstance(o, dict):
+                if '()' in o:
+                    result = self.configure_custom(o)
+                else:
+                    result = {}
+                    for k in o:
+                        result[k] = convert(o[k])
+            else:
+                result = self.convert(o)
+            return result
+
+        c = config.pop('()')
+        if not callable(c):
+            c = self.resolve(c)
+        props = config.pop('.', None)
+        # Check for valid identifiers
+        args = config.pop('[]', ())
+        if args:
+            args = tuple([convert(o) for o in args])
+        items = [(k, convert(config[k])) for k in config if valid_ident(k)]
+        kwargs = dict(items)
+        result = c(*args, **kwargs)
+        if props:
+            for n, v in props.items():
+                setattr(result, n, convert(v))
+        return result
+
+    def __getitem__(self, key):
+        result = self.config[key]
+        if isinstance(result, dict) and '()' in result:
+            self.config[key] = result = self.configure_custom(result)
+        return result
+
+    def inc_convert(self, value):
+        """Default converter for the inc:// protocol."""
+        if not os.path.isabs(value):
+            value = os.path.join(self.base, value)
+        with codecs.open(value, 'r', encoding='utf-8') as f:
+            result = json.load(f)
+        return result
+
+
+class SubprocessMixin(object):
+    """
+    Mixin for running subprocesses and capturing their output
+    """
+    def __init__(self, verbose=False, progress=None):
+        self.verbose = verbose
+        self.progress = progress
+
+    def reader(self, stream, context):
+        """
+        Read lines from a subprocess' output stream and either pass to a progress
+        callable (if specified) or write progress information to sys.stderr.
+        """
+        progress = self.progress
+        verbose = self.verbose
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            if progress is not None:
+                progress(s, context)
+            else:
+                if not verbose:
+                    sys.stderr.write('.')
+                else:
+                    sys.stderr.write(s.decode('utf-8'))
+                sys.stderr.flush()
+        stream.close()
+
+    def run_command(self, cmd, **kwargs):
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE, **kwargs)
+        t1 = threading.Thread(target=self.reader, args=(p.stdout, 'stdout'))
+        t1.start()
+        t2 = threading.Thread(target=self.reader, args=(p.stderr, 'stderr'))
+        t2.start()
+        p.wait()
+        t1.join()
+        t2.join()
+        if self.progress is not None:
+            self.progress('done.', 'main')
+        elif self.verbose:
+            sys.stderr.write('done.\n')
+        return p
+
+
+def normalize_name(name):
+    """Normalize a python package name a la PEP 503"""
+    # https://www.python.org/dev/peps/pep-0503/#normalized-names
+    return re.sub('[-_.]+', '-', name).lower()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/version.py
new file mode 100644
index 00000000..3eebe18e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/version.py
@@ -0,0 +1,736 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Implementation of a flexible versioning scheme providing support for PEP-440,
+setuptools-compatible and semantic versioning.
+"""
+
+import logging
+import re
+
+from .compat import string_types
+from .util import parse_requirement
+
+__all__ = ['NormalizedVersion', 'NormalizedMatcher',
+           'LegacyVersion', 'LegacyMatcher',
+           'SemanticVersion', 'SemanticMatcher',
+           'UnsupportedVersionError', 'get_scheme']
+
+logger = logging.getLogger(__name__)
+
+
+class UnsupportedVersionError(ValueError):
+    """This is an unsupported version."""
+    pass
+
+
+class Version(object):
+    def __init__(self, s):
+        self._string = s = s.strip()
+        self._parts = parts = self.parse(s)
+        assert isinstance(parts, tuple)
+        assert len(parts) > 0
+
+    def parse(self, s):
+        raise NotImplementedError('please implement in a subclass')
+
+    def _check_compatible(self, other):
+        if type(self) != type(other):
+            raise TypeError('cannot compare %r and %r' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __lt__(self, other):
+        self._check_compatible(other)
+        return self._parts < other._parts
+
+    def __gt__(self, other):
+        return not (self.__lt__(other) or self.__eq__(other))
+
+    def __le__(self, other):
+        return self.__lt__(other) or self.__eq__(other)
+
+    def __ge__(self, other):
+        return self.__gt__(other) or self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self._parts)
+
+    def __repr__(self):
+        return "%s('%s')" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+    @property
+    def is_prerelease(self):
+        raise NotImplementedError('Please implement in subclasses.')
+
+
+class Matcher(object):
+    version_class = None
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '<': lambda v, c, p: v < c,
+        '>': lambda v, c, p: v > c,
+        '<=': lambda v, c, p: v == c or v < c,
+        '>=': lambda v, c, p: v == c or v > c,
+        '==': lambda v, c, p: v == c,
+        '===': lambda v, c, p: v == c,
+        # by default, compatible => >=.
+        '~=': lambda v, c, p: v == c or v > c,
+        '!=': lambda v, c, p: v != c,
+    }
+
+    # this is a method only to support alternative implementations
+    # via overriding
+    def parse_requirement(self, s):
+        return parse_requirement(s)
+
+    def __init__(self, s):
+        if self.version_class is None:
+            raise ValueError('Please specify a version class')
+        self._string = s = s.strip()
+        r = self.parse_requirement(s)
+        if not r:
+            raise ValueError('Not valid: %r' % s)
+        self.name = r.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        clist = []
+        if r.constraints:
+            # import pdb; pdb.set_trace()
+            for op, s in r.constraints:
+                if s.endswith('.*'):
+                    if op not in ('==', '!='):
+                        raise ValueError('\'.*\' not allowed for '
+                                         '%r constraints' % op)
+                    # Could be a partial version (e.g. for '2.*') which
+                    # won't parse as a version, so keep it as a string
+                    vn, prefix = s[:-2], True
+                    # Just to check that vn is a valid version
+                    self.version_class(vn)
+                else:
+                    # Should parse as a version, so we can create an
+                    # instance for the comparison
+                    vn, prefix = self.version_class(s), False
+                clist.append((op, vn, prefix))
+        self._parts = tuple(clist)
+
+    def match(self, version):
+        """
+        Check if the provided version matches the constraints.
+
+        :param version: The version to match against this instance.
+        :type version: String or :class:`Version` instance.
+        """
+        if isinstance(version, string_types):
+            version = self.version_class(version)
+        for operator, constraint, prefix in self._parts:
+            f = self._operators.get(operator)
+            if isinstance(f, string_types):
+                f = getattr(self, f)
+            if not f:
+                msg = ('%r not implemented '
+                       'for %s' % (operator, self.__class__.__name__))
+                raise NotImplementedError(msg)
+            if not f(version, constraint, prefix):
+                return False
+        return True
+
+    @property
+    def exact_version(self):
+        result = None
+        if len(self._parts) == 1 and self._parts[0][0] in ('==', '==='):
+            result = self._parts[0][1]
+        return result
+
+    def _check_compatible(self, other):
+        if type(self) != type(other) or self.name != other.name:
+            raise TypeError('cannot compare %s and %s' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self.key == other.key and self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self.key) + hash(self._parts)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+
+PEP440_VERSION_RE = re.compile(r'^v?(\d+!)?(\d+(\.\d+)*)((a|b|c|rc)(\d+))?'
+                               r'(\.(post)(\d+))?(\.(dev)(\d+))?'
+                               r'(\+([a-zA-Z\d]+(\.[a-zA-Z\d]+)?))?$')
+
+
+def _pep_440_key(s):
+    s = s.strip()
+    m = PEP440_VERSION_RE.match(s)
+    if not m:
+        raise UnsupportedVersionError('Not a valid version: %s' % s)
+    groups = m.groups()
+    nums = tuple(int(v) for v in groups[1].split('.'))
+    while len(nums) > 1 and nums[-1] == 0:
+        nums = nums[:-1]
+
+    if not groups[0]:
+        epoch = 0
+    else:
+        epoch = int(groups[0])
+    pre = groups[4:6]
+    post = groups[7:9]
+    dev = groups[10:12]
+    local = groups[13]
+    if pre == (None, None):
+        pre = ()
+    else:
+        pre = pre[0], int(pre[1])
+    if post == (None, None):
+        post = ()
+    else:
+        post = post[0], int(post[1])
+    if dev == (None, None):
+        dev = ()
+    else:
+        dev = dev[0], int(dev[1])
+    if local is None:
+        local = ()
+    else:
+        parts = []
+        for part in local.split('.'):
+            # to ensure that numeric compares as > lexicographic, avoid
+            # comparing them directly, but encode a tuple which ensures
+            # correct sorting
+            if part.isdigit():
+                part = (1, int(part))
+            else:
+                part = (0, part)
+            parts.append(part)
+        local = tuple(parts)
+    if not pre:
+        # either before pre-release, or final release and after
+        if not post and dev:
+            # before pre-release
+            pre = ('a', -1)     # to sort before a0
+        else:
+            pre = ('z',)        # to sort after all pre-releases
+    # now look at the state of post and dev.
+    if not post:
+        post = ('_',)   # sort before 'a'
+    if not dev:
+        dev = ('final',)
+
+    #print('%s -> %s' % (s, m.groups()))
+    return epoch, nums, pre, post, dev, local
+
+
+_normalized_key = _pep_440_key
+
+
+class NormalizedVersion(Version):
+    """A rational version.
+
+    Good:
+        1.2         # equivalent to "1.2.0"
+        1.2.0
+        1.2a1
+        1.2.3a2
+        1.2.3b1
+        1.2.3c1
+        1.2.3.4
+        TODO: fill this out
+
+    Bad:
+        1           # minimum two numbers
+        1.2a        # release level must have a release serial
+        1.2.3b
+    """
+    def parse(self, s):
+        result = _normalized_key(s)
+        # _normalized_key loses trailing zeroes in the release
+        # clause, since that's needed to ensure that X.Y == X.Y.0 == X.Y.0.0
+        # However, PEP 440 prefix matching needs it: for example,
+        # (~= 1.4.5.0) matches differently to (~= 1.4.5.0.0).
+        m = PEP440_VERSION_RE.match(s)      # must succeed
+        groups = m.groups()
+        self._release_clause = tuple(int(v) for v in groups[1].split('.'))
+        return result
+
+    PREREL_TAGS = set(['a', 'b', 'c', 'rc', 'dev'])
+
+    @property
+    def is_prerelease(self):
+        return any(t[0] in self.PREREL_TAGS for t in self._parts if t)
+
+
+def _match_prefix(x, y):
+    x = str(x)
+    y = str(y)
+    if x == y:
+        return True
+    if not x.startswith(y):
+        return False
+    n = len(y)
+    return x[n] == '.'
+
+
+class NormalizedMatcher(Matcher):
+    version_class = NormalizedVersion
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '~=': '_match_compatible',
+        '<': '_match_lt',
+        '>': '_match_gt',
+        '<=': '_match_le',
+        '>=': '_match_ge',
+        '==': '_match_eq',
+        '===': '_match_arbitrary',
+        '!=': '_match_ne',
+    }
+
+    def _adjust_local(self, version, constraint, prefix):
+        if prefix:
+            strip_local = '+' not in constraint and version._parts[-1]
+        else:
+            # both constraint and version are
+            # NormalizedVersion instances.
+            # If constraint does not have a local component,
+            # ensure the version doesn't, either.
+            strip_local = not constraint._parts[-1] and version._parts[-1]
+        if strip_local:
+            s = version._string.split('+', 1)[0]
+            version = self.version_class(s)
+        return version, constraint
+
+    def _match_lt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version >= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_gt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version <= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_le(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version <= constraint
+
+    def _match_ge(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version >= constraint
+
+    def _match_eq(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version == constraint)
+        else:
+            result = _match_prefix(version, constraint)
+        return result
+
+    def _match_arbitrary(self, version, constraint, prefix):
+        return str(version) == str(constraint)
+
+    def _match_ne(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version != constraint)
+        else:
+            result = not _match_prefix(version, constraint)
+        return result
+
+    def _match_compatible(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version == constraint:
+            return True
+        if version < constraint:
+            return False
+#        if not prefix:
+#            return True
+        release_clause = constraint._release_clause
+        if len(release_clause) > 1:
+            release_clause = release_clause[:-1]
+        pfx = '.'.join([str(i) for i in release_clause])
+        return _match_prefix(version, pfx)
+
+_REPLACEMENTS = (
+    (re.compile('[.+-]$'), ''),                     # remove trailing puncts
+    (re.compile(r'^[.](\d)'), r'0.\1'),             # .N -> 0.N at start
+    (re.compile('^[.-]'), ''),                      # remove leading puncts
+    (re.compile(r'^\((.*)\)$'), r'\1'),             # remove parentheses
+    (re.compile(r'^v(ersion)?\s*(\d+)'), r'\2'),    # remove leading v(ersion)
+    (re.compile(r'^r(ev)?\s*(\d+)'), r'\2'),        # remove leading v(ersion)
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\b(alfa|apha)\b'), 'alpha'),      # misspelt alpha
+    (re.compile(r'\b(pre-alpha|prealpha)\b'),
+                'pre.alpha'),                       # standardise
+    (re.compile(r'\(beta\)$'), 'beta'),             # remove parentheses
+)
+
+_SUFFIX_REPLACEMENTS = (
+    (re.compile('^[:~._+-]+'), ''),                   # remove leading puncts
+    (re.compile('[,*")([\\]]'), ''),                  # remove unwanted chars
+    (re.compile('[~:+_ -]'), '.'),                    # replace illegal chars
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\.$'), ''),                       # trailing '.'
+)
+
+_NUMERIC_PREFIX = re.compile(r'(\d+(\.\d+)*)')
+
+
+def _suggest_semantic_version(s):
+    """
+    Try to suggest a semantic form for a version for which
+    _suggest_normalized_version couldn't come up with anything.
+    """
+    result = s.strip().lower()
+    for pat, repl in _REPLACEMENTS:
+        result = pat.sub(repl, result)
+    if not result:
+        result = '0.0.0'
+
+    # Now look for numeric prefix, and separate it out from
+    # the rest.
+    #import pdb; pdb.set_trace()
+    m = _NUMERIC_PREFIX.match(result)
+    if not m:
+        prefix = '0.0.0'
+        suffix = result
+    else:
+        prefix = m.groups()[0].split('.')
+        prefix = [int(i) for i in prefix]
+        while len(prefix) < 3:
+            prefix.append(0)
+        if len(prefix) == 3:
+            suffix = result[m.end():]
+        else:
+            suffix = '.'.join([str(i) for i in prefix[3:]]) + result[m.end():]
+            prefix = prefix[:3]
+        prefix = '.'.join([str(i) for i in prefix])
+        suffix = suffix.strip()
+    if suffix:
+        #import pdb; pdb.set_trace()
+        # massage the suffix.
+        for pat, repl in _SUFFIX_REPLACEMENTS:
+            suffix = pat.sub(repl, suffix)
+
+    if not suffix:
+        result = prefix
+    else:
+        sep = '-' if 'dev' in suffix else '+'
+        result = prefix + sep + suffix
+    if not is_semver(result):
+        result = None
+    return result
+
+
+def _suggest_normalized_version(s):
+    """Suggest a normalized version close to the given version string.
+
+    If you have a version string that isn't rational (i.e. NormalizedVersion
+    doesn't like it) then you might be able to get an equivalent (or close)
+    rational version from this function.
+
+    This does a number of simple normalizations to the given string, based
+    on observation of versions currently in use on PyPI. Given a dump of
+    those version during PyCon 2009, 4287 of them:
+    - 2312 (53.93%) match NormalizedVersion without change
+      with the automatic suggestion
+    - 3474 (81.04%) match when using this suggestion method
+
+    @param s {str} An irrational version string.
+    @returns A rational version string, or None, if couldn't determine one.
+    """
+    try:
+        _normalized_key(s)
+        return s   # already rational
+    except UnsupportedVersionError:
+        pass
+
+    rs = s.lower()
+
+    # part of this could use maketrans
+    for orig, repl in (('-alpha', 'a'), ('-beta', 'b'), ('alpha', 'a'),
+                       ('beta', 'b'), ('rc', 'c'), ('-final', ''),
+                       ('-pre', 'c'),
+                       ('-release', ''), ('.release', ''), ('-stable', ''),
+                       ('+', '.'), ('_', '.'), (' ', ''), ('.final', ''),
+                       ('final', '')):
+        rs = rs.replace(orig, repl)
+
+    # if something ends with dev or pre, we add a 0
+    rs = re.sub(r"pre$", r"pre0", rs)
+    rs = re.sub(r"dev$", r"dev0", rs)
+
+    # if we have something like "b-2" or "a.2" at the end of the
+    # version, that is probably beta, alpha, etc
+    # let's remove the dash or dot
+    rs = re.sub(r"([abc]|rc)[\-\.](\d+)$", r"\1\2", rs)
+
+    # 1.0-dev-r371 -> 1.0.dev371
+    # 0.1-dev-r79 -> 0.1.dev79
+    rs = re.sub(r"[\-\.](dev)[\-\.]?r?(\d+)$", r".\1\2", rs)
+
+    # Clean: 2.0.a.3, 2.0.b1, 0.9.0~c1
+    rs = re.sub(r"[.~]?([abc])\.?", r"\1", rs)
+
+    # Clean: v0.3, v1.0
+    if rs.startswith('v'):
+        rs = rs[1:]
+
+    # Clean leading '0's on numbers.
+    #TODO: unintended side-effect on, e.g., "2003.05.09"
+    # PyPI stats: 77 (~2%) better
+    rs = re.sub(r"\b0+(\d+)(?!\d)", r"\1", rs)
+
+    # Clean a/b/c with no version. E.g. "1.0a" -> "1.0a0". Setuptools infers
+    # zero.
+    # PyPI stats: 245 (7.56%) better
+    rs = re.sub(r"(\d+[abc])$", r"\g<1>0", rs)
+
+    # the 'dev-rNNN' tag is a dev tag
+    rs = re.sub(r"\.?(dev-r|dev\.r)\.?(\d+)$", r".dev\2", rs)
+
+    # clean the - when used as a pre delimiter
+    rs = re.sub(r"-(a|b|c)(\d+)$", r"\1\2", rs)
+
+    # a terminal "dev" or "devel" can be changed into ".dev0"
+    rs = re.sub(r"[\.\-](dev|devel)$", r".dev0", rs)
+
+    # a terminal "dev" can be changed into ".dev0"
+    rs = re.sub(r"(?![\.\-])dev$", r".dev0", rs)
+
+    # a terminal "final" or "stable" can be removed
+    rs = re.sub(r"(final|stable)$", "", rs)
+
+    # The 'r' and the '-' tags are post release tags
+    #   0.4a1.r10       ->  0.4a1.post10
+    #   0.9.33-17222    ->  0.9.33.post17222
+    #   0.9.33-r17222   ->  0.9.33.post17222
+    rs = re.sub(r"\.?(r|-|-r)\.?(\d+)$", r".post\2", rs)
+
+    # Clean 'r' instead of 'dev' usage:
+    #   0.9.33+r17222   ->  0.9.33.dev17222
+    #   1.0dev123       ->  1.0.dev123
+    #   1.0.git123      ->  1.0.dev123
+    #   1.0.bzr123      ->  1.0.dev123
+    #   0.1a0dev.123    ->  0.1a0.dev123
+    # PyPI stats:  ~150 (~4%) better
+    rs = re.sub(r"\.?(dev|git|bzr)\.?(\d+)$", r".dev\2", rs)
+
+    # Clean '.pre' (normalized from '-pre' above) instead of 'c' usage:
+    #   0.2.pre1        ->  0.2c1
+    #   0.2-c1         ->  0.2c1
+    #   1.0preview123   ->  1.0c123
+    # PyPI stats: ~21 (0.62%) better
+    rs = re.sub(r"\.?(pre|preview|-c)(\d+)$", r"c\g<2>", rs)
+
+    # Tcl/Tk uses "px" for their post release markers
+    rs = re.sub(r"p(\d+)$", r".post\1", rs)
+
+    try:
+        _normalized_key(rs)
+    except UnsupportedVersionError:
+        rs = None
+    return rs
+
+#
+#   Legacy version processing (distribute-compatible)
+#
+
+_VERSION_PART = re.compile(r'([a-z]+|\d+|[\.-])', re.I)
+_VERSION_REPLACE = {
+    'pre': 'c',
+    'preview': 'c',
+    '-': 'final-',
+    'rc': 'c',
+    'dev': '@',
+    '': None,
+    '.': None,
+}
+
+
+def _legacy_key(s):
+    def get_parts(s):
+        result = []
+        for p in _VERSION_PART.split(s.lower()):
+            p = _VERSION_REPLACE.get(p, p)
+            if p:
+                if '0' <= p[:1] <= '9':
+                    p = p.zfill(8)
+                else:
+                    p = '*' + p
+                result.append(p)
+        result.append('*final')
+        return result
+
+    result = []
+    for p in get_parts(s):
+        if p.startswith('*'):
+            if p < '*final':
+                while result and result[-1] == '*final-':
+                    result.pop()
+            while result and result[-1] == '00000000':
+                result.pop()
+        result.append(p)
+    return tuple(result)
+
+
+class LegacyVersion(Version):
+    def parse(self, s):
+        return _legacy_key(s)
+
+    @property
+    def is_prerelease(self):
+        result = False
+        for x in self._parts:
+            if (isinstance(x, string_types) and x.startswith('*') and
+                x < '*final'):
+                result = True
+                break
+        return result
+
+
+class LegacyMatcher(Matcher):
+    version_class = LegacyVersion
+
+    _operators = dict(Matcher._operators)
+    _operators['~='] = '_match_compatible'
+
+    numeric_re = re.compile(r'^(\d+(\.\d+)*)')
+
+    def _match_compatible(self, version, constraint, prefix):
+        if version < constraint:
+            return False
+        m = self.numeric_re.match(str(constraint))
+        if not m:
+            logger.warning('Cannot compute compatible match for version %s '
+                           ' and constraint %s', version, constraint)
+            return True
+        s = m.groups()[0]
+        if '.' in s:
+            s = s.rsplit('.', 1)[0]
+        return _match_prefix(version, s)
+
+#
+#   Semantic versioning
+#
+
+_SEMVER_RE = re.compile(r'^(\d+)\.(\d+)\.(\d+)'
+                        r'(-[a-z0-9]+(\.[a-z0-9-]+)*)?'
+                        r'(\+[a-z0-9]+(\.[a-z0-9-]+)*)?$', re.I)
+
+
+def is_semver(s):
+    return _SEMVER_RE.match(s)
+
+
+def _semantic_key(s):
+    def make_tuple(s, absent):
+        if s is None:
+            result = (absent,)
+        else:
+            parts = s[1:].split('.')
+            # We can't compare ints and strings on Python 3, so fudge it
+            # by zero-filling numeric values so simulate a numeric comparison
+            result = tuple([p.zfill(8) if p.isdigit() else p for p in parts])
+        return result
+
+    m = is_semver(s)
+    if not m:
+        raise UnsupportedVersionError(s)
+    groups = m.groups()
+    major, minor, patch = [int(i) for i in groups[:3]]
+    # choose the '|' and '*' so that versions sort correctly
+    pre, build = make_tuple(groups[3], '|'), make_tuple(groups[5], '*')
+    return (major, minor, patch), pre, build
+
+
+class SemanticVersion(Version):
+    def parse(self, s):
+        return _semantic_key(s)
+
+    @property
+    def is_prerelease(self):
+        return self._parts[1][0] != '|'
+
+
+class SemanticMatcher(Matcher):
+    version_class = SemanticVersion
+
+
+class VersionScheme(object):
+    def __init__(self, key, matcher, suggester=None):
+        self.key = key
+        self.matcher = matcher
+        self.suggester = suggester
+
+    def is_valid_version(self, s):
+        try:
+            self.matcher.version_class(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_matcher(self, s):
+        try:
+            self.matcher(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_constraint_list(self, s):
+        """
+        Used for processing some metadata fields
+        """
+        return self.is_valid_matcher('dummy_name (%s)' % s)
+
+    def suggest(self, s):
+        if self.suggester is None:
+            result = None
+        else:
+            result = self.suggester(s)
+        return result
+
+_SCHEMES = {
+    'normalized': VersionScheme(_normalized_key, NormalizedMatcher,
+                                _suggest_normalized_version),
+    'legacy': VersionScheme(_legacy_key, LegacyMatcher, lambda self, s: s),
+    'semantic': VersionScheme(_semantic_key, SemanticMatcher,
+                              _suggest_semantic_version),
+}
+
+_SCHEMES['default'] = _SCHEMES['normalized']
+
+
+def get_scheme(name):
+    if name not in _SCHEMES:
+        raise ValueError('unknown scheme name: %r' % name)
+    return _SCHEMES[name]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w32.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w32.exe
new file mode 100644
index 00000000..4df77001
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w32.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w64.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w64.exe
new file mode 100644
index 00000000..63ce483d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/w64.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/wheel.py
new file mode 100644
index 00000000..0c8efad9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distlib/wheel.py
@@ -0,0 +1,1004 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import datetime
+import distutils.util
+from email import message_from_file
+import hashlib
+import imp
+import json
+import logging
+import os
+import posixpath
+import re
+import shutil
+import sys
+import tempfile
+import zipfile
+
+from . import __version__, DistlibException
+from .compat import sysconfig, ZipFile, fsdecode, text_type, filter
+from .database import InstalledDistribution
+from .metadata import Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME
+from .util import (FileOperator, convert_path, CSVReader, CSVWriter, Cache,
+                   cached_property, get_cache_base, read_exports, tempdir)
+from .version import NormalizedVersion, UnsupportedVersionError
+
+logger = logging.getLogger(__name__)
+
+cache = None    # created when needed
+
+if hasattr(sys, 'pypy_version_info'):  # pragma: no cover
+    IMP_PREFIX = 'pp'
+elif sys.platform.startswith('java'):  # pragma: no cover
+    IMP_PREFIX = 'jy'
+elif sys.platform == 'cli':  # pragma: no cover
+    IMP_PREFIX = 'ip'
+else:
+    IMP_PREFIX = 'cp'
+
+VER_SUFFIX = sysconfig.get_config_var('py_version_nodot')
+if not VER_SUFFIX:   # pragma: no cover
+    VER_SUFFIX = '%s%s' % sys.version_info[:2]
+PYVER = 'py' + VER_SUFFIX
+IMPVER = IMP_PREFIX + VER_SUFFIX
+
+ARCH = distutils.util.get_platform().replace('-', '_').replace('.', '_')
+
+ABI = sysconfig.get_config_var('SOABI')
+if ABI and ABI.startswith('cpython-'):
+    ABI = ABI.replace('cpython-', 'cp')
+else:
+    def _derive_abi():
+        parts = ['cp', VER_SUFFIX]
+        if sysconfig.get_config_var('Py_DEBUG'):
+            parts.append('d')
+        if sysconfig.get_config_var('WITH_PYMALLOC'):
+            parts.append('m')
+        if sysconfig.get_config_var('Py_UNICODE_SIZE') == 4:
+            parts.append('u')
+        return ''.join(parts)
+    ABI = _derive_abi()
+    del _derive_abi
+
+FILENAME_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?
+-(?P<py>\w+\d+(\.\w+\d+)*)
+-(?P<bi>\w+)
+-(?P<ar>\w+(\.\w+)*)
+\.whl$
+''', re.IGNORECASE | re.VERBOSE)
+
+NAME_VERSION_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?$
+''', re.IGNORECASE | re.VERBOSE)
+
+SHEBANG_RE = re.compile(br'\s*#![^\r\n]*')
+SHEBANG_DETAIL_RE = re.compile(br'^(\s*#!("[^"]+"|\S+))\s+(.*)$')
+SHEBANG_PYTHON = b'#!python'
+SHEBANG_PYTHONW = b'#!pythonw'
+
+if os.sep == '/':
+    to_posix = lambda o: o
+else:
+    to_posix = lambda o: o.replace(os.sep, '/')
+
+
+class Mounter(object):
+    def __init__(self):
+        self.impure_wheels = {}
+        self.libs = {}
+
+    def add(self, pathname, extensions):
+        self.impure_wheels[pathname] = extensions
+        self.libs.update(extensions)
+
+    def remove(self, pathname):
+        extensions = self.impure_wheels.pop(pathname)
+        for k, v in extensions:
+            if k in self.libs:
+                del self.libs[k]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.libs:
+            result = self
+        else:
+            result = None
+        return result
+
+    def load_module(self, fullname):
+        if fullname in sys.modules:
+            result = sys.modules[fullname]
+        else:
+            if fullname not in self.libs:
+                raise ImportError('unable to find extension for %s' % fullname)
+            result = imp.load_dynamic(fullname, self.libs[fullname])
+            result.__loader__ = self
+            parts = fullname.rsplit('.', 1)
+            if len(parts) > 1:
+                result.__package__ = parts[0]
+        return result
+
+_hook = Mounter()
+
+
+class Wheel(object):
+    """
+    Class to build and install from Wheel files (PEP 427).
+    """
+
+    wheel_version = (1, 1)
+    hash_kind = 'sha256'
+
+    def __init__(self, filename=None, sign=False, verify=False):
+        """
+        Initialise an instance using a (valid) filename.
+        """
+        self.sign = sign
+        self.should_verify = verify
+        self.buildver = ''
+        self.pyver = [PYVER]
+        self.abi = ['none']
+        self.arch = ['any']
+        self.dirname = os.getcwd()
+        if filename is None:
+            self.name = 'dummy'
+            self.version = '0.1'
+            self._filename = self.filename
+        else:
+            m = NAME_VERSION_RE.match(filename)
+            if m:
+                info = m.groupdict('')
+                self.name = info['nm']
+                # Reinstate the local version separator
+                self.version = info['vn'].replace('_', '-')
+                self.buildver = info['bn']
+                self._filename = self.filename
+            else:
+                dirname, filename = os.path.split(filename)
+                m = FILENAME_RE.match(filename)
+                if not m:
+                    raise DistlibException('Invalid name or '
+                                           'filename: %r' % filename)
+                if dirname:
+                    self.dirname = os.path.abspath(dirname)
+                self._filename = filename
+                info = m.groupdict('')
+                self.name = info['nm']
+                self.version = info['vn']
+                self.buildver = info['bn']
+                self.pyver = info['py'].split('.')
+                self.abi = info['bi'].split('.')
+                self.arch = info['ar'].split('.')
+
+    @property
+    def filename(self):
+        """
+        Build and return a filename from the various components.
+        """
+        if self.buildver:
+            buildver = '-' + self.buildver
+        else:
+            buildver = ''
+        pyver = '.'.join(self.pyver)
+        abi = '.'.join(self.abi)
+        arch = '.'.join(self.arch)
+        # replace - with _ as a local version separator
+        version = self.version.replace('-', '_')
+        return '%s-%s%s-%s-%s-%s.whl' % (self.name, version, buildver,
+                                         pyver, abi, arch)
+
+    @property
+    def exists(self):
+        path = os.path.join(self.dirname, self.filename)
+        return os.path.isfile(path)
+
+    @property
+    def tags(self):
+        for pyver in self.pyver:
+            for abi in self.abi:
+                for arch in self.arch:
+                    yield pyver, abi, arch
+
+    @cached_property
+    def metadata(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        wrapper = codecs.getreader('utf-8')
+        with ZipFile(pathname, 'r') as zf:
+            wheel_metadata = self.get_wheel_metadata(zf)
+            wv = wheel_metadata['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            if file_version < (1, 1):
+                fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME, 'METADATA']
+            else:
+                fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME]
+            result = None
+            for fn in fns:
+                try:
+                    metadata_filename = posixpath.join(info_dir, fn)
+                    with zf.open(metadata_filename) as bf:
+                        wf = wrapper(bf)
+                        result = Metadata(fileobj=wf)
+                        if result:
+                            break
+                except KeyError:
+                    pass
+            if not result:
+                raise ValueError('Invalid wheel, because metadata is '
+                                 'missing: looked in %s' % ', '.join(fns))
+        return result
+
+    def get_wheel_metadata(self, zf):
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        metadata_filename = posixpath.join(info_dir, 'WHEEL')
+        with zf.open(metadata_filename) as bf:
+            wf = codecs.getreader('utf-8')(bf)
+            message = message_from_file(wf)
+        return dict(message)
+
+    @cached_property
+    def info(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        with ZipFile(pathname, 'r') as zf:
+            result = self.get_wheel_metadata(zf)
+        return result
+
+    def process_shebang(self, data):
+        m = SHEBANG_RE.match(data)
+        if m:
+            end = m.end()
+            shebang, data_after_shebang = data[:end], data[end:]
+            # Preserve any arguments after the interpreter
+            if b'pythonw' in shebang.lower():
+                shebang_python = SHEBANG_PYTHONW
+            else:
+                shebang_python = SHEBANG_PYTHON
+            m = SHEBANG_DETAIL_RE.match(shebang)
+            if m:
+                args = b' ' + m.groups()[-1]
+            else:
+                args = b''
+            shebang = shebang_python + args
+            data = shebang + data_after_shebang
+        else:
+            cr = data.find(b'\r')
+            lf = data.find(b'\n')
+            if cr < 0 or cr > lf:
+                term = b'\n'
+            else:
+                if data[cr:cr + 2] == b'\r\n':
+                    term = b'\r\n'
+                else:
+                    term = b'\r'
+            data = SHEBANG_PYTHON + term + data
+        return data
+
+    def get_hash(self, data, hash_kind=None):
+        if hash_kind is None:
+            hash_kind = self.hash_kind
+        try:
+            hasher = getattr(hashlib, hash_kind)
+        except AttributeError:
+            raise DistlibException('Unsupported hash algorithm: %r' % hash_kind)
+        result = hasher(data).digest()
+        result = base64.urlsafe_b64encode(result).rstrip(b'=').decode('ascii')
+        return hash_kind, result
+
+    def write_record(self, records, record_path, base):
+        records = list(records) # make a copy for sorting
+        p = to_posix(os.path.relpath(record_path, base))
+        records.append((p, '', ''))
+        records.sort()
+        with CSVWriter(record_path) as writer:
+            for row in records:
+                writer.writerow(row)
+
+    def write_records(self, info, libdir, archive_paths):
+        records = []
+        distinfo, info_dir = info
+        hasher = getattr(hashlib, self.hash_kind)
+        for ap, p in archive_paths:
+            with open(p, 'rb') as f:
+                data = f.read()
+            digest = '%s=%s' % self.get_hash(data)
+            size = os.path.getsize(p)
+            records.append((ap, digest, size))
+
+        p = os.path.join(distinfo, 'RECORD')
+        self.write_record(records, p, libdir)
+        ap = to_posix(os.path.join(info_dir, 'RECORD'))
+        archive_paths.append((ap, p))
+
+    def build_zip(self, pathname, archive_paths):
+        with ZipFile(pathname, 'w', zipfile.ZIP_DEFLATED) as zf:
+            for ap, p in archive_paths:
+                logger.debug('Wrote %s to %s in wheel', p, ap)
+                zf.write(p, ap)
+
+    def build(self, paths, tags=None, wheel_version=None):
+        """
+        Build a wheel from files in specified paths, and use any specified tags
+        when determining the name of the wheel.
+        """
+        if tags is None:
+            tags = {}
+
+        libkey = list(filter(lambda o: o in paths, ('purelib', 'platlib')))[0]
+        if libkey == 'platlib':
+            is_pure = 'false'
+            default_pyver = [IMPVER]
+            default_abi = [ABI]
+            default_arch = [ARCH]
+        else:
+            is_pure = 'true'
+            default_pyver = [PYVER]
+            default_abi = ['none']
+            default_arch = ['any']
+
+        self.pyver = tags.get('pyver', default_pyver)
+        self.abi = tags.get('abi', default_abi)
+        self.arch = tags.get('arch', default_arch)
+
+        libdir = paths[libkey]
+
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        archive_paths = []
+
+        # First, stuff which is not in site-packages
+        for key in ('data', 'headers', 'scripts'):
+            if key not in paths:
+                continue
+            path = paths[key]
+            if os.path.isdir(path):
+                for root, dirs, files in os.walk(path):
+                    for fn in files:
+                        p = fsdecode(os.path.join(root, fn))
+                        rp = os.path.relpath(p, path)
+                        ap = to_posix(os.path.join(data_dir, key, rp))
+                        archive_paths.append((ap, p))
+                        if key == 'scripts' and not p.endswith('.exe'):
+                            with open(p, 'rb') as f:
+                                data = f.read()
+                            data = self.process_shebang(data)
+                            with open(p, 'wb') as f:
+                                f.write(data)
+
+        # Now, stuff which is in site-packages, other than the
+        # distinfo stuff.
+        path = libdir
+        distinfo = None
+        for root, dirs, files in os.walk(path):
+            if root == path:
+                # At the top level only, save distinfo for later
+                # and skip it for now
+                for i, dn in enumerate(dirs):
+                    dn = fsdecode(dn)
+                    if dn.endswith('.dist-info'):
+                        distinfo = os.path.join(root, dn)
+                        del dirs[i]
+                        break
+                assert distinfo, '.dist-info directory expected, not found'
+
+            for fn in files:
+                # comment out next suite to leave .pyc files in
+                if fsdecode(fn).endswith(('.pyc', '.pyo')):
+                    continue
+                p = os.path.join(root, fn)
+                rp = to_posix(os.path.relpath(p, path))
+                archive_paths.append((rp, p))
+
+        # Now distinfo. Assumed to be flat, i.e. os.listdir is enough.
+        files = os.listdir(distinfo)
+        for fn in files:
+            if fn not in ('RECORD', 'INSTALLER', 'SHARED', 'WHEEL'):
+                p = fsdecode(os.path.join(distinfo, fn))
+                ap = to_posix(os.path.join(info_dir, fn))
+                archive_paths.append((ap, p))
+
+        wheel_metadata = [
+            'Wheel-Version: %d.%d' % (wheel_version or self.wheel_version),
+            'Generator: distlib %s' % __version__,
+            'Root-Is-Purelib: %s' % is_pure,
+        ]
+        for pyver, abi, arch in self.tags:
+            wheel_metadata.append('Tag: %s-%s-%s' % (pyver, abi, arch))
+        p = os.path.join(distinfo, 'WHEEL')
+        with open(p, 'w') as f:
+            f.write('\n'.join(wheel_metadata))
+        ap = to_posix(os.path.join(info_dir, 'WHEEL'))
+        archive_paths.append((ap, p))
+
+        # Now, at last, RECORD.
+        # Paths in here are archive paths - nothing else makes sense.
+        self.write_records((distinfo, info_dir), libdir, archive_paths)
+        # Now, ready to build the zip file
+        pathname = os.path.join(self.dirname, self.filename)
+        self.build_zip(pathname, archive_paths)
+        return pathname
+
+    def skip_entry(self, arcname):
+        """
+        Determine whether an archive entry should be skipped when verifying
+        or installing.
+        """
+        # The signature file won't be in RECORD,
+        # and we  don't currently don't do anything with it
+        # We also skip directories, as they won't be in RECORD
+        # either. See:
+        #
+        # https://github.com/pypa/wheel/issues/294
+        # https://github.com/pypa/wheel/issues/287
+        # https://github.com/pypa/wheel/pull/289
+        #
+        return arcname.endswith(('/', '/RECORD.jws'))
+
+    def install(self, paths, maker, **kwargs):
+        """
+        Install a wheel to the specified paths. If kwarg ``warner`` is
+        specified, it should be a callable, which will be called with two
+        tuples indicating the wheel version of this software and the wheel
+        version in the file, if there is a discrepancy in the versions.
+        This can be used to issue any warnings to raise any exceptions.
+        If kwarg ``lib_only`` is True, only the purelib/platlib files are
+        installed, and the headers, scripts, data and dist-info metadata are
+        not written. If kwarg ``bytecode_hashed_invalidation`` is True, written
+        bytecode will try to use file-hash based invalidation (PEP-552) on
+        supported interpreter versions (CPython 2.7+).
+
+        The return value is a :class:`InstalledDistribution` instance unless
+        ``options.lib_only`` is True, in which case the return value is ``None``.
+        """
+
+        dry_run = maker.dry_run
+        warner = kwargs.get('warner')
+        lib_only = kwargs.get('lib_only', False)
+        bc_hashed_invalidation = kwargs.get('bytecode_hashed_invalidation', False)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            if (file_version != self.wheel_version) and warner:
+                warner(self.wheel_version, file_version)
+
+            if message['Root-Is-Purelib'] == 'true':
+                libdir = paths['purelib']
+            else:
+                libdir = paths['platlib']
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            data_pfx = posixpath.join(data_dir, '')
+            info_pfx = posixpath.join(info_dir, '')
+            script_pfx = posixpath.join(data_dir, 'scripts', '')
+
+            # make a new instance rather than a copy of maker's,
+            # as we mutate it
+            fileop = FileOperator(dry_run=dry_run)
+            fileop.record = True    # so we can rollback if needed
+
+            bc = not sys.dont_write_bytecode    # Double negatives. Lovely!
+
+            outfiles = []   # for RECORD writing
+
+            # for script copying/shebang processing
+            workdir = tempfile.mkdtemp()
+            # set target dir later
+            # we default add_launchers to False, as the
+            # Python Launcher should be used instead
+            maker.source_dir = workdir
+            maker.target_dir = None
+            try:
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if self.skip_entry(u_arcname):
+                        continue
+                    row = records[u_arcname]
+                    if row[2] and str(zinfo.file_size) != row[2]:
+                        raise DistlibException('size mismatch for '
+                                               '%s' % u_arcname)
+                    if row[1]:
+                        kind, value = row[1].split('=', 1)
+                        with zf.open(arcname) as bf:
+                            data = bf.read()
+                        _, digest = self.get_hash(data, kind)
+                        if digest != value:
+                            raise DistlibException('digest mismatch for '
+                                                   '%s' % arcname)
+
+                    if lib_only and u_arcname.startswith((info_pfx, data_pfx)):
+                        logger.debug('lib_only: skipping %s', u_arcname)
+                        continue
+                    is_script = (u_arcname.startswith(script_pfx)
+                                 and not u_arcname.endswith('.exe'))
+
+                    if u_arcname.startswith(data_pfx):
+                        _, where, rp = u_arcname.split('/', 2)
+                        outfile = os.path.join(paths[where], convert_path(rp))
+                    else:
+                        # meant for site-packages.
+                        if u_arcname in (wheel_metadata_name, record_name):
+                            continue
+                        outfile = os.path.join(libdir, convert_path(u_arcname))
+                    if not is_script:
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, outfile)
+                        outfiles.append(outfile)
+                        # Double check the digest of the written file
+                        if not dry_run and row[1]:
+                            with open(outfile, 'rb') as bf:
+                                data = bf.read()
+                                _, newdigest = self.get_hash(data, kind)
+                                if newdigest != digest:
+                                    raise DistlibException('digest mismatch '
+                                                           'on write for '
+                                                           '%s' % outfile)
+                        if bc and outfile.endswith('.py'):
+                            try:
+                                pyc = fileop.byte_compile(outfile,
+                                                          hashed_invalidation=bc_hashed_invalidation)
+                                outfiles.append(pyc)
+                            except Exception:
+                                # Don't give up if byte-compilation fails,
+                                # but log it and perhaps warn the user
+                                logger.warning('Byte-compilation failed',
+                                               exc_info=True)
+                    else:
+                        fn = os.path.basename(convert_path(arcname))
+                        workname = os.path.join(workdir, fn)
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, workname)
+
+                        dn, fn = os.path.split(outfile)
+                        maker.target_dir = dn
+                        filenames = maker.make(fn)
+                        fileop.set_executable_mode(filenames)
+                        outfiles.extend(filenames)
+
+                if lib_only:
+                    logger.debug('lib_only: returning None')
+                    dist = None
+                else:
+                    # Generate scripts
+
+                    # Try to get pydist.json so we can see if there are
+                    # any commands to generate. If this fails (e.g. because
+                    # of a legacy wheel), log a warning but don't give up.
+                    commands = None
+                    file_version = self.info['Wheel-Version']
+                    if file_version == '1.0':
+                        # Use legacy info
+                        ep = posixpath.join(info_dir, 'entry_points.txt')
+                        try:
+                            with zf.open(ep) as bwf:
+                                epdata = read_exports(bwf)
+                            commands = {}
+                            for key in ('console', 'gui'):
+                                k = '%s_scripts' % key
+                                if k in epdata:
+                                    commands['wrap_%s' % key] = d = {}
+                                    for v in epdata[k].values():
+                                        s = '%s:%s' % (v.prefix, v.suffix)
+                                        if v.flags:
+                                            s += ' %s' % v.flags
+                                        d[v.name] = s
+                        except Exception:
+                            logger.warning('Unable to read legacy script '
+                                           'metadata, so cannot generate '
+                                           'scripts')
+                    else:
+                        try:
+                            with zf.open(metadata_name) as bwf:
+                                wf = wrapper(bwf)
+                                commands = json.load(wf).get('extensions')
+                                if commands:
+                                    commands = commands.get('python.commands')
+                        except Exception:
+                            logger.warning('Unable to read JSON metadata, so '
+                                           'cannot generate scripts')
+                    if commands:
+                        console_scripts = commands.get('wrap_console', {})
+                        gui_scripts = commands.get('wrap_gui', {})
+                        if console_scripts or gui_scripts:
+                            script_dir = paths.get('scripts', '')
+                            if not os.path.isdir(script_dir):
+                                raise ValueError('Valid script path not '
+                                                 'specified')
+                            maker.target_dir = script_dir
+                            for k, v in console_scripts.items():
+                                script = '%s = %s' % (k, v)
+                                filenames = maker.make(script)
+                                fileop.set_executable_mode(filenames)
+
+                            if gui_scripts:
+                                options = {'gui': True }
+                                for k, v in gui_scripts.items():
+                                    script = '%s = %s' % (k, v)
+                                    filenames = maker.make(script, options)
+                                    fileop.set_executable_mode(filenames)
+
+                    p = os.path.join(libdir, info_dir)
+                    dist = InstalledDistribution(p)
+
+                    # Write SHARED
+                    paths = dict(paths)     # don't change passed in dict
+                    del paths['purelib']
+                    del paths['platlib']
+                    paths['lib'] = libdir
+                    p = dist.write_shared_locations(paths, dry_run)
+                    if p:
+                        outfiles.append(p)
+
+                    # Write RECORD
+                    dist.write_installed_files(outfiles, paths['prefix'],
+                                               dry_run)
+                return dist
+            except Exception:  # pragma: no cover
+                logger.exception('installation failed.')
+                fileop.rollback()
+                raise
+            finally:
+                shutil.rmtree(workdir)
+
+    def _get_dylib_cache(self):
+        global cache
+        if cache is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('dylib-cache'),
+                                sys.version[:3])
+            cache = Cache(base)
+        return cache
+
+    def _get_extensions(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        arcname = posixpath.join(info_dir, 'EXTENSIONS')
+        wrapper = codecs.getreader('utf-8')
+        result = []
+        with ZipFile(pathname, 'r') as zf:
+            try:
+                with zf.open(arcname) as bf:
+                    wf = wrapper(bf)
+                    extensions = json.load(wf)
+                    cache = self._get_dylib_cache()
+                    prefix = cache.prefix_to_dir(pathname)
+                    cache_base = os.path.join(cache.base, prefix)
+                    if not os.path.isdir(cache_base):
+                        os.makedirs(cache_base)
+                    for name, relpath in extensions.items():
+                        dest = os.path.join(cache_base, convert_path(relpath))
+                        if not os.path.exists(dest):
+                            extract = True
+                        else:
+                            file_time = os.stat(dest).st_mtime
+                            file_time = datetime.datetime.fromtimestamp(file_time)
+                            info = zf.getinfo(relpath)
+                            wheel_time = datetime.datetime(*info.date_time)
+                            extract = wheel_time > file_time
+                        if extract:
+                            zf.extract(relpath, cache_base)
+                        result.append((name, dest))
+            except KeyError:
+                pass
+        return result
+
+    def is_compatible(self):
+        """
+        Determine if a wheel is compatible with the running system.
+        """
+        return is_compatible(self)
+
+    def is_mountable(self):
+        """
+        Determine if a wheel is asserted as mountable by its metadata.
+        """
+        return True # for now - metadata details TBD
+
+    def mount(self, append=False):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if not self.is_compatible():
+            msg = 'Wheel %s not compatible with this Python.' % pathname
+            raise DistlibException(msg)
+        if not self.is_mountable():
+            msg = 'Wheel %s is marked as not mountable.' % pathname
+            raise DistlibException(msg)
+        if pathname in sys.path:
+            logger.debug('%s already in path', pathname)
+        else:
+            if append:
+                sys.path.append(pathname)
+            else:
+                sys.path.insert(0, pathname)
+            extensions = self._get_extensions()
+            if extensions:
+                if _hook not in sys.meta_path:
+                    sys.meta_path.append(_hook)
+                _hook.add(pathname, extensions)
+
+    def unmount(self):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if pathname not in sys.path:
+            logger.debug('%s not in path', pathname)
+        else:
+            sys.path.remove(pathname)
+            if pathname in _hook.impure_wheels:
+                _hook.remove(pathname)
+            if not _hook.impure_wheels:
+                if _hook in sys.meta_path:
+                    sys.meta_path.remove(_hook)
+
+    def verify(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            # TODO version verification
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            for zinfo in zf.infolist():
+                arcname = zinfo.filename
+                if isinstance(arcname, text_type):
+                    u_arcname = arcname
+                else:
+                    u_arcname = arcname.decode('utf-8')
+                # See issue #115: some wheels have .. in their entries, but
+                # in the filename ... e.g. __main__..py ! So the check is
+                # updated to look for .. in the directory portions
+                p = u_arcname.split('/')
+                if '..' in p:
+                    raise DistlibException('invalid entry in '
+                                           'wheel: %r' % u_arcname)
+
+                if self.skip_entry(u_arcname):
+                    continue
+                row = records[u_arcname]
+                if row[2] and str(zinfo.file_size) != row[2]:
+                    raise DistlibException('size mismatch for '
+                                           '%s' % u_arcname)
+                if row[1]:
+                    kind, value = row[1].split('=', 1)
+                    with zf.open(arcname) as bf:
+                        data = bf.read()
+                    _, digest = self.get_hash(data, kind)
+                    if digest != value:
+                        raise DistlibException('digest mismatch for '
+                                               '%s' % arcname)
+
+    def update(self, modifier, dest_dir=None, **kwargs):
+        """
+        Update the contents of a wheel in a generic way. The modifier should
+        be a callable which expects a dictionary argument: its keys are
+        archive-entry paths, and its values are absolute filesystem paths
+        where the contents the corresponding archive entries can be found. The
+        modifier is free to change the contents of the files pointed to, add
+        new entries and remove entries, before returning. This method will
+        extract the entire contents of the wheel to a temporary location, call
+        the modifier, and then use the passed (and possibly updated)
+        dictionary to write a new wheel. If ``dest_dir`` is specified, the new
+        wheel is written there -- otherwise, the original wheel is overwritten.
+
+        The modifier should return True if it updated the wheel, else False.
+        This method returns the same value the modifier returns.
+        """
+
+        def get_version(path_map, info_dir):
+            version = path = None
+            key = '%s/%s' % (info_dir, METADATA_FILENAME)
+            if key not in path_map:
+                key = '%s/PKG-INFO' % info_dir
+            if key in path_map:
+                path = path_map[key]
+                version = Metadata(path=path).version
+            return version, path
+
+        def update_version(version, path):
+            updated = None
+            try:
+                v = NormalizedVersion(version)
+                i = version.find('-')
+                if i < 0:
+                    updated = '%s+1' % version
+                else:
+                    parts = [int(s) for s in version[i + 1:].split('.')]
+                    parts[-1] += 1
+                    updated = '%s+%s' % (version[:i],
+                                         '.'.join(str(i) for i in parts))
+            except UnsupportedVersionError:
+                logger.debug('Cannot update non-compliant (PEP-440) '
+                             'version %r', version)
+            if updated:
+                md = Metadata(path=path)
+                md.version = updated
+                legacy = not path.endswith(METADATA_FILENAME)
+                md.write(path=path, legacy=legacy)
+                logger.debug('Version updated from %r to %r', version,
+                             updated)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        record_name = posixpath.join(info_dir, 'RECORD')
+        with tempdir() as workdir:
+            with ZipFile(pathname, 'r') as zf:
+                path_map = {}
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if u_arcname == record_name:
+                        continue
+                    if '..' in u_arcname:
+                        raise DistlibException('invalid entry in '
+                                               'wheel: %r' % u_arcname)
+                    zf.extract(zinfo, workdir)
+                    path = os.path.join(workdir, convert_path(u_arcname))
+                    path_map[u_arcname] = path
+
+            # Remember the version.
+            original_version, _ = get_version(path_map, info_dir)
+            # Files extracted. Call the modifier.
+            modified = modifier(path_map, **kwargs)
+            if modified:
+                # Something changed - need to build a new wheel.
+                current_version, path = get_version(path_map, info_dir)
+                if current_version and (current_version == original_version):
+                    # Add or update local version to signify changes.
+                    update_version(current_version, path)
+                # Decide where the new wheel goes.
+                if dest_dir is None:
+                    fd, newpath = tempfile.mkstemp(suffix='.whl',
+                                                   prefix='wheel-update-',
+                                                   dir=workdir)
+                    os.close(fd)
+                else:
+                    if not os.path.isdir(dest_dir):
+                        raise DistlibException('Not a directory: %r' % dest_dir)
+                    newpath = os.path.join(dest_dir, self.filename)
+                archive_paths = list(path_map.items())
+                distinfo = os.path.join(workdir, info_dir)
+                info = distinfo, info_dir
+                self.write_records(info, workdir, archive_paths)
+                self.build_zip(newpath, archive_paths)
+                if dest_dir is None:
+                    shutil.copyfile(newpath, pathname)
+        return modified
+
+def compatible_tags():
+    """
+    Return (pyver, abi, arch) tuples compatible with this Python.
+    """
+    versions = [VER_SUFFIX]
+    major = VER_SUFFIX[0]
+    for minor in range(sys.version_info[1] - 1, - 1, -1):
+        versions.append(''.join([major, str(minor)]))
+
+    abis = []
+    for suffix, _, _ in imp.get_suffixes():
+        if suffix.startswith('.abi'):
+            abis.append(suffix.split('.', 2)[1])
+    abis.sort()
+    if ABI != 'none':
+        abis.insert(0, ABI)
+    abis.append('none')
+    result = []
+
+    arches = [ARCH]
+    if sys.platform == 'darwin':
+        m = re.match(r'(\w+)_(\d+)_(\d+)_(\w+)$', ARCH)
+        if m:
+            name, major, minor, arch = m.groups()
+            minor = int(minor)
+            matches = [arch]
+            if arch in ('i386', 'ppc'):
+                matches.append('fat')
+            if arch in ('i386', 'ppc', 'x86_64'):
+                matches.append('fat3')
+            if arch in ('ppc64', 'x86_64'):
+                matches.append('fat64')
+            if arch in ('i386', 'x86_64'):
+                matches.append('intel')
+            if arch in ('i386', 'x86_64', 'intel', 'ppc', 'ppc64'):
+                matches.append('universal')
+            while minor >= 0:
+                for match in matches:
+                    s = '%s_%s_%s_%s' % (name, major, minor, match)
+                    if s != ARCH:   # already there
+                        arches.append(s)
+                minor -= 1
+
+    # Most specific - our Python version, ABI and arch
+    for abi in abis:
+        for arch in arches:
+            result.append((''.join((IMP_PREFIX, versions[0])), abi, arch))
+
+    # where no ABI / arch dependency, but IMP_PREFIX dependency
+    for i, version in enumerate(versions):
+        result.append((''.join((IMP_PREFIX, version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join((IMP_PREFIX, version[0])), 'none', 'any'))
+
+    # no IMP_PREFIX, ABI or arch dependency
+    for i, version in enumerate(versions):
+        result.append((''.join(('py', version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join(('py', version[0])), 'none', 'any'))
+    return set(result)
+
+
+COMPATIBLE_TAGS = compatible_tags()
+
+del compatible_tags
+
+
+def is_compatible(wheel, tags=None):
+    if not isinstance(wheel, Wheel):
+        wheel = Wheel(wheel)    # assume it's a filename
+    result = False
+    if tags is None:
+        tags = COMPATIBLE_TAGS
+    for ver, abi, arch in tags:
+        if ver in wheel.pyver and abi in wheel.abi and arch in wheel.arch:
+            result = True
+            break
+    return result
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distro.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distro.py
new file mode 100644
index 00000000..33061633
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/distro.py
@@ -0,0 +1,1216 @@
+# Copyright 2015,2016,2017 Nir Cohen
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+The ``distro`` package (``distro`` stands for Linux Distribution) provides
+information about the Linux distribution it runs on, such as a reliable
+machine-readable distro ID, or version information.
+
+It is the recommended replacement for Python's original
+:py:func:`platform.linux_distribution` function, but it provides much more
+functionality. An alternative implementation became necessary because Python
+3.5 deprecated this function, and Python 3.8 will remove it altogether.
+Its predecessor function :py:func:`platform.dist` was already
+deprecated since Python 2.6 and will also be removed in Python 3.8.
+Still, there are many cases in which access to OS distribution information
+is needed. See `Python issue 1322 <https://bugs.python.org/issue1322>`_ for
+more information.
+"""
+
+import os
+import re
+import sys
+import json
+import shlex
+import logging
+import argparse
+import subprocess
+
+
+_UNIXCONFDIR = os.environ.get('UNIXCONFDIR', '/etc')
+_OS_RELEASE_BASENAME = 'os-release'
+
+#: Translation table for normalizing the "ID" attribute defined in os-release
+#: files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as defined in the os-release file, translated to lower case,
+#:   with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_OS_ID = {
+    'ol': 'oracle',  # Oracle Enterprise Linux
+}
+
+#: Translation table for normalizing the "Distributor ID" attribute returned by
+#: the lsb_release command, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as returned by the lsb_release command, translated to lower
+#:   case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_LSB_ID = {
+    'enterpriseenterprise': 'oracle',  # Oracle Enterprise Linux
+    'redhatenterpriseworkstation': 'rhel',  # RHEL 6, 7 Workstation
+    'redhatenterpriseserver': 'rhel',  # RHEL 6, 7 Server
+}
+
+#: Translation table for normalizing the distro ID derived from the file name
+#: of distro release files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as derived from the file name of a distro release file,
+#:   translated to lower case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_DISTRO_ID = {
+    'redhat': 'rhel',  # RHEL 6.x, 7.x
+}
+
+# Pattern for content of distro release file (reversed)
+_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile(
+    r'(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)')
+
+# Pattern for base file name of distro release file
+_DISTRO_RELEASE_BASENAME_PATTERN = re.compile(
+    r'(\w+)[-_](release|version)$')
+
+# Base file names to be ignored when searching for distro release file
+_DISTRO_RELEASE_IGNORE_BASENAMES = (
+    'debian_version',
+    'lsb-release',
+    'oem-release',
+    _OS_RELEASE_BASENAME,
+    'system-release'
+)
+
+
+def linux_distribution(full_distribution_name=True):
+    """
+    Return information about the current OS distribution as a tuple
+    ``(id_name, version, codename)`` with items as follows:
+
+    * ``id_name``:  If *full_distribution_name* is false, the result of
+      :func:`distro.id`. Otherwise, the result of :func:`distro.name`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``codename``:  The result of :func:`distro.codename`.
+
+    The interface of this function is compatible with the original
+    :py:func:`platform.linux_distribution` function, supporting a subset of
+    its parameters.
+
+    The data it returns may not exactly be the same, because it uses more data
+    sources than the original function, and that may lead to different data if
+    the OS distribution is not consistent across multiple data sources it
+    provides (there are indeed such distributions ...).
+
+    Another reason for differences is the fact that the :func:`distro.id`
+    method normalizes the distro ID string to a reliable machine-readable value
+    for a number of popular OS distributions.
+    """
+    return _distro.linux_distribution(full_distribution_name)
+
+
+def id():
+    """
+    Return the distro ID of the current distribution, as a
+    machine-readable string.
+
+    For a number of OS distributions, the returned distro ID value is
+    *reliable*, in the sense that it is documented and that it does not change
+    across releases of the distribution.
+
+    This package maintains the following reliable distro ID values:
+
+    ==============  =========================================
+    Distro ID       Distribution
+    ==============  =========================================
+    "ubuntu"        Ubuntu
+    "debian"        Debian
+    "rhel"          RedHat Enterprise Linux
+    "centos"        CentOS
+    "fedora"        Fedora
+    "sles"          SUSE Linux Enterprise Server
+    "opensuse"      openSUSE
+    "amazon"        Amazon Linux
+    "arch"          Arch Linux
+    "cloudlinux"    CloudLinux OS
+    "exherbo"       Exherbo Linux
+    "gentoo"        GenToo Linux
+    "ibm_powerkvm"  IBM PowerKVM
+    "kvmibm"        KVM for IBM z Systems
+    "linuxmint"     Linux Mint
+    "mageia"        Mageia
+    "mandriva"      Mandriva Linux
+    "parallels"     Parallels
+    "pidora"        Pidora
+    "raspbian"      Raspbian
+    "oracle"        Oracle Linux (and Oracle Enterprise Linux)
+    "scientific"    Scientific Linux
+    "slackware"     Slackware
+    "xenserver"     XenServer
+    "openbsd"       OpenBSD
+    "netbsd"        NetBSD
+    "freebsd"       FreeBSD
+    ==============  =========================================
+
+    If you have a need to get distros for reliable IDs added into this set,
+    or if you find that the :func:`distro.id` function returns a different
+    distro ID for one of the listed distros, please create an issue in the
+    `distro issue tracker`_.
+
+    **Lookup hierarchy and transformations:**
+
+    First, the ID is obtained from the following sources, in the specified
+    order. The first available and non-empty value is used:
+
+    * the value of the "ID" attribute of the os-release file,
+
+    * the value of the "Distributor ID" attribute returned by the lsb_release
+      command,
+
+    * the first part of the file name of the distro release file,
+
+    The so determined ID value then passes the following transformations,
+    before it is returned by this method:
+
+    * it is translated to lower case,
+
+    * blanks (which should not be there anyway) are translated to underscores,
+
+    * a normalization of the ID is performed, based upon
+      `normalization tables`_. The purpose of this normalization is to ensure
+      that the ID is as reliable as possible, even across incompatible changes
+      in the OS distributions. A common reason for an incompatible change is
+      the addition of an os-release file, or the addition of the lsb_release
+      command, with ID values that differ from what was previously determined
+      from the distro release file name.
+    """
+    return _distro.id()
+
+
+def name(pretty=False):
+    """
+    Return the name of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the name is returned without version or codename.
+    (e.g. "CentOS Linux")
+
+    If *pretty* is true, the version and codename are appended.
+    (e.g. "CentOS Linux 7.1.1503 (Core)")
+
+    **Lookup hierarchy:**
+
+    The name is obtained from the following sources, in the specified order.
+    The first available and non-empty value is used:
+
+    * If *pretty* is false:
+
+      - the value of the "NAME" attribute of the os-release file,
+
+      - the value of the "Distributor ID" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file.
+
+    * If *pretty* is true:
+
+      - the value of the "PRETTY_NAME" attribute of the os-release file,
+
+      - the value of the "Description" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file, appended
+        with the value of the pretty version ("<version_id>" and "<codename>"
+        fields) of the distro release file, if available.
+    """
+    return _distro.name(pretty)
+
+
+def version(pretty=False, best=False):
+    """
+    Return the version of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the version is returned without codename (e.g.
+    "7.0").
+
+    If *pretty* is true, the codename in parenthesis is appended, if the
+    codename is non-empty (e.g. "7.0 (Maipo)").
+
+    Some distributions provide version numbers with different precisions in
+    the different sources of distribution information. Examining the different
+    sources in a fixed priority order does not always yield the most precise
+    version (e.g. for Debian 8.2, or CentOS 7.1).
+
+    The *best* parameter can be used to control the approach for the returned
+    version:
+
+    If *best* is false, the first non-empty version number in priority order of
+    the examined sources is returned.
+
+    If *best* is true, the most precise version number out of all examined
+    sources is returned.
+
+    **Lookup hierarchy:**
+
+    In all cases, the version number is obtained from the following sources.
+    If *best* is false, this order represents the priority order:
+
+    * the value of the "VERSION_ID" attribute of the os-release file,
+    * the value of the "Release" attribute returned by the lsb_release
+      command,
+    * the version number parsed from the "<version_id>" field of the first line
+      of the distro release file,
+    * the version number parsed from the "PRETTY_NAME" attribute of the
+      os-release file, if it follows the format of the distro release files.
+    * the version number parsed from the "Description" attribute returned by
+      the lsb_release command, if it follows the format of the distro release
+      files.
+    """
+    return _distro.version(pretty, best)
+
+
+def version_parts(best=False):
+    """
+    Return the version of the current OS distribution as a tuple
+    ``(major, minor, build_number)`` with items as follows:
+
+    * ``major``:  The result of :func:`distro.major_version`.
+
+    * ``minor``:  The result of :func:`distro.minor_version`.
+
+    * ``build_number``:  The result of :func:`distro.build_number`.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.version_parts(best)
+
+
+def major_version(best=False):
+    """
+    Return the major version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The major version is the first
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.major_version(best)
+
+
+def minor_version(best=False):
+    """
+    Return the minor version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The minor version is the second
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.minor_version(best)
+
+
+def build_number(best=False):
+    """
+    Return the build number of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The build number is the third part
+    of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.build_number(best)
+
+
+def like():
+    """
+    Return a space-separated list of distro IDs of distributions that are
+    closely related to the current OS distribution in regards to packaging
+    and programming interfaces, for example distributions the current
+    distribution is a derivative from.
+
+    **Lookup hierarchy:**
+
+    This information item is only provided by the os-release file.
+    For details, see the description of the "ID_LIKE" attribute in the
+    `os-release man page
+    <http://www.freedesktop.org/software/systemd/man/os-release.html>`_.
+    """
+    return _distro.like()
+
+
+def codename():
+    """
+    Return the codename for the release of the current OS distribution,
+    as a string.
+
+    If the distribution does not have a codename, an empty string is returned.
+
+    Note that the returned codename is not always really a codename. For
+    example, openSUSE returns "x86_64". This function does not handle such
+    cases in any special way and just returns the string it finds, if any.
+
+    **Lookup hierarchy:**
+
+    * the codename within the "VERSION" attribute of the os-release file, if
+      provided,
+
+    * the value of the "Codename" attribute returned by the lsb_release
+      command,
+
+    * the value of the "<codename>" field of the distro release file.
+    """
+    return _distro.codename()
+
+
+def info(pretty=False, best=False):
+    """
+    Return certain machine-readable information items about the current OS
+    distribution in a dictionary, as shown in the following example:
+
+    .. sourcecode:: python
+
+        {
+            'id': 'rhel',
+            'version': '7.0',
+            'version_parts': {
+                'major': '7',
+                'minor': '0',
+                'build_number': ''
+            },
+            'like': 'fedora',
+            'codename': 'Maipo'
+        }
+
+    The dictionary structure and keys are always the same, regardless of which
+    information items are available in the underlying data sources. The values
+    for the various keys are as follows:
+
+    * ``id``:  The result of :func:`distro.id`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``version_parts -> major``:  The result of :func:`distro.major_version`.
+
+    * ``version_parts -> minor``:  The result of :func:`distro.minor_version`.
+
+    * ``version_parts -> build_number``:  The result of
+      :func:`distro.build_number`.
+
+    * ``like``:  The result of :func:`distro.like`.
+
+    * ``codename``:  The result of :func:`distro.codename`.
+
+    For a description of the *pretty* and *best* parameters, see the
+    :func:`distro.version` method.
+    """
+    return _distro.info(pretty, best)
+
+
+def os_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the os-release file data source of the current OS distribution.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_info()
+
+
+def lsb_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the lsb_release command data source of the current OS distribution.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_info()
+
+
+def distro_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_info()
+
+
+def uname_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+    """
+    return _distro.uname_info()
+
+
+def os_release_attr(attribute):
+    """
+    Return a single named information item from the os-release file data source
+    of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_attr(attribute)
+
+
+def lsb_release_attr(attribute):
+    """
+    Return a single named information item from the lsb_release command output
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_attr(attribute)
+
+
+def distro_release_attr(attribute):
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_attr(attribute)
+
+
+def uname_attr(attribute):
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+                The empty string, if the item does not exist.
+    """
+    return _distro.uname_attr(attribute)
+
+
+class cached_property(object):
+    """A version of @property which caches the value.  On access, it calls the
+    underlying function and sets the value in `__dict__` so future accesses
+    will not re-call the property.
+    """
+    def __init__(self, f):
+        self._fname = f.__name__
+        self._f = f
+
+    def __get__(self, obj, owner):
+        assert obj is not None, 'call {} on an instance'.format(self._fname)
+        ret = obj.__dict__[self._fname] = self._f(obj)
+        return ret
+
+
+class LinuxDistribution(object):
+    """
+    Provides information about a OS distribution.
+
+    This package creates a private module-global instance of this class with
+    default initialization arguments, that is used by the
+    `consolidated accessor functions`_ and `single source accessor functions`_.
+    By using default initialization arguments, that module-global instance
+    returns data about the current OS distribution (i.e. the distro this
+    package runs on).
+
+    Normally, it is not necessary to create additional instances of this class.
+    However, in situations where control is needed over the exact data sources
+    that are used, instances of this class can be created with a specific
+    distro release file, or a specific os-release file, or without invoking the
+    lsb_release command.
+    """
+
+    def __init__(self,
+                 include_lsb=True,
+                 os_release_file='',
+                 distro_release_file='',
+                 include_uname=True):
+        """
+        The initialization method of this class gathers information from the
+        available data sources, and stores that in private instance attributes.
+        Subsequent access to the information items uses these private instance
+        attributes, so that the data sources are read only once.
+
+        Parameters:
+
+        * ``include_lsb`` (bool): Controls whether the
+          `lsb_release command output`_ is included as a data source.
+
+          If the lsb_release command is not available in the program execution
+          path, the data source for the lsb_release command will be empty.
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause the default path name to
+          be used (see `os-release file`_ for details).
+
+          If the specified or defaulted os-release file does not exist, the
+          data source for the os-release file will be empty.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause a default search algorithm
+          to be used (see `distro release file`_ for details).
+
+          If the specified distro release file does not exist, or if no default
+          distro release file can be found, the data source for the distro
+          release file will be empty.
+
+        * ``include_name`` (bool): Controls whether uname command output is
+          included as a data source. If the uname command is not available in
+          the program execution path the data source for the uname command will
+          be empty.
+
+        Public instance attributes:
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``include_lsb`` (bool): The result of the ``include_lsb`` parameter.
+          This controls whether the lsb information will be loaded.
+
+        * ``include_uname`` (bool): The result of the ``include_uname``
+          parameter. This controls whether the uname information will
+          be loaded.
+
+        Raises:
+
+        * :py:exc:`IOError`: Some I/O issue with an os-release file or distro
+          release file.
+
+        * :py:exc:`subprocess.CalledProcessError`: The lsb_release command had
+          some issue (other than not being available in the program execution
+          path).
+
+        * :py:exc:`UnicodeError`: A data source has unexpected characters or
+          uses an unexpected encoding.
+        """
+        self.os_release_file = os_release_file or \
+            os.path.join(_UNIXCONFDIR, _OS_RELEASE_BASENAME)
+        self.distro_release_file = distro_release_file or ''  # updated later
+        self.include_lsb = include_lsb
+        self.include_uname = include_uname
+
+    def __repr__(self):
+        """Return repr of all info
+        """
+        return \
+            "LinuxDistribution(" \
+            "os_release_file={self.os_release_file!r}, " \
+            "distro_release_file={self.distro_release_file!r}, " \
+            "include_lsb={self.include_lsb!r}, " \
+            "include_uname={self.include_uname!r}, " \
+            "_os_release_info={self._os_release_info!r}, " \
+            "_lsb_release_info={self._lsb_release_info!r}, " \
+            "_distro_release_info={self._distro_release_info!r}, " \
+            "_uname_info={self._uname_info!r})".format(
+                self=self)
+
+    def linux_distribution(self, full_distribution_name=True):
+        """
+        Return information about the OS distribution that is compatible
+        with Python's :func:`platform.linux_distribution`, supporting a subset
+        of its parameters.
+
+        For details, see :func:`distro.linux_distribution`.
+        """
+        return (
+            self.name() if full_distribution_name else self.id(),
+            self.version(),
+            self.codename()
+        )
+
+    def id(self):
+        """Return the distro ID of the OS distribution, as a string.
+
+        For details, see :func:`distro.id`.
+        """
+        def normalize(distro_id, table):
+            distro_id = distro_id.lower().replace(' ', '_')
+            return table.get(distro_id, distro_id)
+
+        distro_id = self.os_release_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_OS_ID)
+
+        distro_id = self.lsb_release_attr('distributor_id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_LSB_ID)
+
+        distro_id = self.distro_release_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        distro_id = self.uname_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        return ''
+
+    def name(self, pretty=False):
+        """
+        Return the name of the OS distribution, as a string.
+
+        For details, see :func:`distro.name`.
+        """
+        name = self.os_release_attr('name') \
+            or self.lsb_release_attr('distributor_id') \
+            or self.distro_release_attr('name') \
+            or self.uname_attr('name')
+        if pretty:
+            name = self.os_release_attr('pretty_name') \
+                or self.lsb_release_attr('description')
+            if not name:
+                name = self.distro_release_attr('name') \
+                       or self.uname_attr('name')
+                version = self.version(pretty=True)
+                if version:
+                    name = name + ' ' + version
+        return name or ''
+
+    def version(self, pretty=False, best=False):
+        """
+        Return the version of the OS distribution, as a string.
+
+        For details, see :func:`distro.version`.
+        """
+        versions = [
+            self.os_release_attr('version_id'),
+            self.lsb_release_attr('release'),
+            self.distro_release_attr('version_id'),
+            self._parse_distro_release_content(
+                self.os_release_attr('pretty_name')).get('version_id', ''),
+            self._parse_distro_release_content(
+                self.lsb_release_attr('description')).get('version_id', ''),
+            self.uname_attr('release')
+        ]
+        version = ''
+        if best:
+            # This algorithm uses the last version in priority order that has
+            # the best precision. If the versions are not in conflict, that
+            # does not matter; otherwise, using the last one instead of the
+            # first one might be considered a surprise.
+            for v in versions:
+                if v.count(".") > version.count(".") or version == '':
+                    version = v
+        else:
+            for v in versions:
+                if v != '':
+                    version = v
+                    break
+        if pretty and version and self.codename():
+            version = u'{0} ({1})'.format(version, self.codename())
+        return version
+
+    def version_parts(self, best=False):
+        """
+        Return the version of the OS distribution, as a tuple of version
+        numbers.
+
+        For details, see :func:`distro.version_parts`.
+        """
+        version_str = self.version(best=best)
+        if version_str:
+            version_regex = re.compile(r'(\d+)\.?(\d+)?\.?(\d+)?')
+            matches = version_regex.match(version_str)
+            if matches:
+                major, minor, build_number = matches.groups()
+                return major, minor or '', build_number or ''
+        return '', '', ''
+
+    def major_version(self, best=False):
+        """
+        Return the major version number of the current distribution.
+
+        For details, see :func:`distro.major_version`.
+        """
+        return self.version_parts(best)[0]
+
+    def minor_version(self, best=False):
+        """
+        Return the minor version number of the current distribution.
+
+        For details, see :func:`distro.minor_version`.
+        """
+        return self.version_parts(best)[1]
+
+    def build_number(self, best=False):
+        """
+        Return the build number of the current distribution.
+
+        For details, see :func:`distro.build_number`.
+        """
+        return self.version_parts(best)[2]
+
+    def like(self):
+        """
+        Return the IDs of distributions that are like the OS distribution.
+
+        For details, see :func:`distro.like`.
+        """
+        return self.os_release_attr('id_like') or ''
+
+    def codename(self):
+        """
+        Return the codename of the OS distribution.
+
+        For details, see :func:`distro.codename`.
+        """
+        try:
+            # Handle os_release specially since distros might purposefully set
+            # this to empty string to have no codename
+            return self._os_release_info['codename']
+        except KeyError:
+            return self.lsb_release_attr('codename') \
+                or self.distro_release_attr('codename') \
+                or ''
+
+    def info(self, pretty=False, best=False):
+        """
+        Return certain machine-readable information about the OS
+        distribution.
+
+        For details, see :func:`distro.info`.
+        """
+        return dict(
+            id=self.id(),
+            version=self.version(pretty, best),
+            version_parts=dict(
+                major=self.major_version(best),
+                minor=self.minor_version(best),
+                build_number=self.build_number(best)
+            ),
+            like=self.like(),
+            codename=self.codename(),
+        )
+
+    def os_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the os-release file data source of the OS distribution.
+
+        For details, see :func:`distro.os_release_info`.
+        """
+        return self._os_release_info
+
+    def lsb_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the lsb_release command data source of the OS
+        distribution.
+
+        For details, see :func:`distro.lsb_release_info`.
+        """
+        return self._lsb_release_info
+
+    def distro_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the distro release file data source of the OS
+        distribution.
+
+        For details, see :func:`distro.distro_release_info`.
+        """
+        return self._distro_release_info
+
+    def uname_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the uname command data source of the OS distribution.
+
+        For details, see :func:`distro.uname_info`.
+        """
+        return self._uname_info
+
+    def os_release_attr(self, attribute):
+        """
+        Return a single named information item from the os-release file data
+        source of the OS distribution.
+
+        For details, see :func:`distro.os_release_attr`.
+        """
+        return self._os_release_info.get(attribute, '')
+
+    def lsb_release_attr(self, attribute):
+        """
+        Return a single named information item from the lsb_release command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.lsb_release_attr`.
+        """
+        return self._lsb_release_info.get(attribute, '')
+
+    def distro_release_attr(self, attribute):
+        """
+        Return a single named information item from the distro release file
+        data source of the OS distribution.
+
+        For details, see :func:`distro.distro_release_attr`.
+        """
+        return self._distro_release_info.get(attribute, '')
+
+    def uname_attr(self, attribute):
+        """
+        Return a single named information item from the uname command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.uname_release_attr`.
+        """
+        return self._uname_info.get(attribute, '')
+
+    @cached_property
+    def _os_release_info(self):
+        """
+        Get the information items from the specified os-release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if os.path.isfile(self.os_release_file):
+            with open(self.os_release_file) as release_file:
+                return self._parse_os_release_content(release_file)
+        return {}
+
+    @staticmethod
+    def _parse_os_release_content(lines):
+        """
+        Parse the lines of an os-release file.
+
+        Parameters:
+
+        * lines: Iterable through the lines in the os-release file.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        lexer = shlex.shlex(lines, posix=True)
+        lexer.whitespace_split = True
+
+        # The shlex module defines its `wordchars` variable using literals,
+        # making it dependent on the encoding of the Python source file.
+        # In Python 2.6 and 2.7, the shlex source file is encoded in
+        # 'iso-8859-1', and the `wordchars` variable is defined as a byte
+        # string. This causes a UnicodeDecodeError to be raised when the
+        # parsed content is a unicode object. The following fix resolves that
+        # (... but it should be fixed in shlex...):
+        if sys.version_info[0] == 2 and isinstance(lexer.wordchars, bytes):
+            lexer.wordchars = lexer.wordchars.decode('iso-8859-1')
+
+        tokens = list(lexer)
+        for token in tokens:
+            # At this point, all shell-like parsing has been done (i.e.
+            # comments processed, quotes and backslash escape sequences
+            # processed, multi-line values assembled, trailing newlines
+            # stripped, etc.), so the tokens are now either:
+            # * variable assignments: var=value
+            # * commands or their arguments (not allowed in os-release)
+            if '=' in token:
+                k, v = token.split('=', 1)
+                if isinstance(v, bytes):
+                    v = v.decode('utf-8')
+                props[k.lower()] = v
+            else:
+                # Ignore any tokens that are not variable assignments
+                pass
+
+        if 'version_codename' in props:
+            # os-release added a version_codename field.  Use that in
+            # preference to anything else Note that some distros purposefully
+            # do not have code names.  They should be setting
+            # version_codename=""
+            props['codename'] = props['version_codename']
+        elif 'ubuntu_codename' in props:
+            # Same as above but a non-standard field name used on older Ubuntus
+            props['codename'] = props['ubuntu_codename']
+        elif 'version' in props:
+            # If there is no version_codename, parse it from the version
+            codename = re.search(r'(\(\D+\))|,(\s+)?\D+', props['version'])
+            if codename:
+                codename = codename.group()
+                codename = codename.strip('()')
+                codename = codename.strip(',')
+                codename = codename.strip()
+                # codename appears within paranthese.
+                props['codename'] = codename
+
+        return props
+
+    @cached_property
+    def _lsb_release_info(self):
+        """
+        Get the information items from the lsb_release command output.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if not self.include_lsb:
+            return {}
+        with open(os.devnull, 'w') as devnull:
+            try:
+                cmd = ('lsb_release', '-a')
+                stdout = subprocess.check_output(cmd, stderr=devnull)
+            except OSError:  # Command not found
+                return {}
+        content = stdout.decode(sys.getfilesystemencoding()).splitlines()
+        return self._parse_lsb_release_content(content)
+
+    @staticmethod
+    def _parse_lsb_release_content(lines):
+        """
+        Parse the output of the lsb_release command.
+
+        Parameters:
+
+        * lines: Iterable through the lines of the lsb_release output.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        for line in lines:
+            kv = line.strip('\n').split(':', 1)
+            if len(kv) != 2:
+                # Ignore lines without colon.
+                continue
+            k, v = kv
+            props.update({k.replace(' ', '_').lower(): v.strip()})
+        return props
+
+    @cached_property
+    def _uname_info(self):
+        with open(os.devnull, 'w') as devnull:
+            try:
+                cmd = ('uname', '-rs')
+                stdout = subprocess.check_output(cmd, stderr=devnull)
+            except OSError:
+                return {}
+        content = stdout.decode(sys.getfilesystemencoding()).splitlines()
+        return self._parse_uname_content(content)
+
+    @staticmethod
+    def _parse_uname_content(lines):
+        props = {}
+        match = re.search(r'^([^\s]+)\s+([\d\.]+)', lines[0].strip())
+        if match:
+            name, version = match.groups()
+
+            # This is to prevent the Linux kernel version from
+            # appearing as the 'best' version on otherwise
+            # identifiable distributions.
+            if name == 'Linux':
+                return {}
+            props['id'] = name.lower()
+            props['name'] = name
+            props['release'] = version
+        return props
+
+    @cached_property
+    def _distro_release_info(self):
+        """
+        Get the information items from the specified distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if self.distro_release_file:
+            # If it was specified, we use it and parse what we can, even if
+            # its file name or content does not match the expected pattern.
+            distro_info = self._parse_distro_release_file(
+                self.distro_release_file)
+            basename = os.path.basename(self.distro_release_file)
+            # The file name pattern for user-specified distro release files
+            # is somewhat more tolerant (compared to when searching for the
+            # file), because we want to use what was specified as best as
+            # possible.
+            match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+            if 'name' in distro_info \
+               and 'cloudlinux' in distro_info['name'].lower():
+                distro_info['id'] = 'cloudlinux'
+            elif match:
+                distro_info['id'] = match.group(1)
+            return distro_info
+        else:
+            try:
+                basenames = os.listdir(_UNIXCONFDIR)
+                # We sort for repeatability in cases where there are multiple
+                # distro specific files; e.g. CentOS, Oracle, Enterprise all
+                # containing `redhat-release` on top of their own.
+                basenames.sort()
+            except OSError:
+                # This may occur when /etc is not readable but we can't be
+                # sure about the *-release files. Check common entries of
+                # /etc for information. If they turn out to not be there the
+                # error is handled in `_parse_distro_release_file()`.
+                basenames = ['SuSE-release',
+                             'arch-release',
+                             'base-release',
+                             'centos-release',
+                             'fedora-release',
+                             'gentoo-release',
+                             'mageia-release',
+                             'mandrake-release',
+                             'mandriva-release',
+                             'mandrivalinux-release',
+                             'manjaro-release',
+                             'oracle-release',
+                             'redhat-release',
+                             'sl-release',
+                             'slackware-version']
+            for basename in basenames:
+                if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
+                    continue
+                match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+                if match:
+                    filepath = os.path.join(_UNIXCONFDIR, basename)
+                    distro_info = self._parse_distro_release_file(filepath)
+                    if 'name' in distro_info:
+                        # The name is always present if the pattern matches
+                        self.distro_release_file = filepath
+                        distro_info['id'] = match.group(1)
+                        if 'cloudlinux' in distro_info['name'].lower():
+                            distro_info['id'] = 'cloudlinux'
+                        return distro_info
+            return {}
+
+    def _parse_distro_release_file(self, filepath):
+        """
+        Parse a distro release file.
+
+        Parameters:
+
+        * filepath: Path name of the distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        try:
+            with open(filepath) as fp:
+                # Only parse the first line. For instance, on SLES there
+                # are multiple lines. We don't want them...
+                return self._parse_distro_release_content(fp.readline())
+        except (OSError, IOError):
+            # Ignore not being able to read a specific, seemingly version
+            # related file.
+            # See https://github.com/nir0s/distro/issues/162
+            return {}
+
+    @staticmethod
+    def _parse_distro_release_content(line):
+        """
+        Parse a line from a distro release file.
+
+        Parameters:
+        * line: Line from the distro release file. Must be a unicode string
+                or a UTF-8 encoded byte string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if isinstance(line, bytes):
+            line = line.decode('utf-8')
+        matches = _DISTRO_RELEASE_CONTENT_REVERSED_PATTERN.match(
+            line.strip()[::-1])
+        distro_info = {}
+        if matches:
+            # regexp ensures non-None
+            distro_info['name'] = matches.group(3)[::-1]
+            if matches.group(2):
+                distro_info['version_id'] = matches.group(2)[::-1]
+            if matches.group(1):
+                distro_info['codename'] = matches.group(1)[::-1]
+        elif line:
+            distro_info['name'] = line.strip()
+        return distro_info
+
+
+_distro = LinuxDistribution()
+
+
+def main():
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.DEBUG)
+    logger.addHandler(logging.StreamHandler(sys.stdout))
+
+    parser = argparse.ArgumentParser(description="OS distro info tool")
+    parser.add_argument(
+        '--json',
+        '-j',
+        help="Output in machine readable format",
+        action="store_true")
+    args = parser.parse_args()
+
+    if args.json:
+        logger.info(json.dumps(info(), indent=4, sort_keys=True))
+    else:
+        logger.info('Name: %s', name(pretty=True))
+        distribution_version = version(pretty=True)
+        logger.info('Version: %s', distribution_version)
+        distribution_codename = codename()
+        logger.info('Codename: %s', distribution_codename)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__init__.py
new file mode 100644
index 00000000..04912349
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__init__.py
@@ -0,0 +1,35 @@
+"""
+HTML parsing library based on the `WHATWG HTML specification
+<https://whatwg.org/html>`_. The parser is designed to be compatible with
+existing HTML found in the wild and implements well-defined error recovery that
+is largely compatible with modern desktop web browsers.
+
+Example usage::
+
+    from pip._vendor import html5lib
+    with open("my_document.html", "rb") as f:
+        tree = html5lib.parse(f)
+
+For convenience, this module re-exports the following names:
+
+* :func:`~.html5parser.parse`
+* :func:`~.html5parser.parseFragment`
+* :class:`~.html5parser.HTMLParser`
+* :func:`~.treebuilders.getTreeBuilder`
+* :func:`~.treewalkers.getTreeWalker`
+* :func:`~.serializer.serialize`
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .html5parser import HTMLParser, parse, parseFragment
+from .treebuilders import getTreeBuilder
+from .treewalkers import getTreeWalker
+from .serializer import serialize
+
+__all__ = ["HTMLParser", "parse", "parseFragment", "getTreeBuilder",
+           "getTreeWalker", "serialize"]
+
+# this has to be at the top level, see how setup.py parses this
+#: Distribution version number.
+__version__ = "1.0.1"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..8a1c72cd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_ihatexml.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_ihatexml.cpython-37.pyc
new file mode 100644
index 00000000..86e4cbe4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_ihatexml.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_inputstream.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_inputstream.cpython-37.pyc
new file mode 100644
index 00000000..96a0040d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_inputstream.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_tokenizer.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_tokenizer.cpython-37.pyc
new file mode 100644
index 00000000..c16c1bf4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_tokenizer.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_utils.cpython-37.pyc
new file mode 100644
index 00000000..3a84199f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/_utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/constants.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/constants.cpython-37.pyc
new file mode 100644
index 00000000..222766fc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/constants.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/html5parser.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/html5parser.cpython-37.pyc
new file mode 100644
index 00000000..84b10cb0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/html5parser.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/serializer.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/serializer.cpython-37.pyc
new file mode 100644
index 00000000..8051998b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/__pycache__/serializer.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_ihatexml.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_ihatexml.py
new file mode 100644
index 00000000..4c77717b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_ihatexml.py
@@ -0,0 +1,288 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+import warnings
+
+from .constants import DataLossWarning
+
+baseChar = """
+[#x0041-#x005A] | [#x0061-#x007A] | [#x00C0-#x00D6] | [#x00D8-#x00F6] |
+[#x00F8-#x00FF] | [#x0100-#x0131] | [#x0134-#x013E] | [#x0141-#x0148] |
+[#x014A-#x017E] | [#x0180-#x01C3] | [#x01CD-#x01F0] | [#x01F4-#x01F5] |
+[#x01FA-#x0217] | [#x0250-#x02A8] | [#x02BB-#x02C1] | #x0386 |
+[#x0388-#x038A] | #x038C | [#x038E-#x03A1] | [#x03A3-#x03CE] |
+[#x03D0-#x03D6] | #x03DA | #x03DC | #x03DE | #x03E0 | [#x03E2-#x03F3] |
+[#x0401-#x040C] | [#x040E-#x044F] | [#x0451-#x045C] | [#x045E-#x0481] |
+[#x0490-#x04C4] | [#x04C7-#x04C8] | [#x04CB-#x04CC] | [#x04D0-#x04EB] |
+[#x04EE-#x04F5] | [#x04F8-#x04F9] | [#x0531-#x0556] | #x0559 |
+[#x0561-#x0586] | [#x05D0-#x05EA] | [#x05F0-#x05F2] | [#x0621-#x063A] |
+[#x0641-#x064A] | [#x0671-#x06B7] | [#x06BA-#x06BE] | [#x06C0-#x06CE] |
+[#x06D0-#x06D3] | #x06D5 | [#x06E5-#x06E6] | [#x0905-#x0939] | #x093D |
+[#x0958-#x0961] | [#x0985-#x098C] | [#x098F-#x0990] | [#x0993-#x09A8] |
+[#x09AA-#x09B0] | #x09B2 | [#x09B6-#x09B9] | [#x09DC-#x09DD] |
+[#x09DF-#x09E1] | [#x09F0-#x09F1] | [#x0A05-#x0A0A] | [#x0A0F-#x0A10] |
+[#x0A13-#x0A28] | [#x0A2A-#x0A30] | [#x0A32-#x0A33] | [#x0A35-#x0A36] |
+[#x0A38-#x0A39] | [#x0A59-#x0A5C] | #x0A5E | [#x0A72-#x0A74] |
+[#x0A85-#x0A8B] | #x0A8D | [#x0A8F-#x0A91] | [#x0A93-#x0AA8] |
+[#x0AAA-#x0AB0] | [#x0AB2-#x0AB3] | [#x0AB5-#x0AB9] | #x0ABD | #x0AE0 |
+[#x0B05-#x0B0C] | [#x0B0F-#x0B10] | [#x0B13-#x0B28] | [#x0B2A-#x0B30] |
+[#x0B32-#x0B33] | [#x0B36-#x0B39] | #x0B3D | [#x0B5C-#x0B5D] |
+[#x0B5F-#x0B61] | [#x0B85-#x0B8A] | [#x0B8E-#x0B90] | [#x0B92-#x0B95] |
+[#x0B99-#x0B9A] | #x0B9C | [#x0B9E-#x0B9F] | [#x0BA3-#x0BA4] |
+[#x0BA8-#x0BAA] | [#x0BAE-#x0BB5] | [#x0BB7-#x0BB9] | [#x0C05-#x0C0C] |
+[#x0C0E-#x0C10] | [#x0C12-#x0C28] | [#x0C2A-#x0C33] | [#x0C35-#x0C39] |
+[#x0C60-#x0C61] | [#x0C85-#x0C8C] | [#x0C8E-#x0C90] | [#x0C92-#x0CA8] |
+[#x0CAA-#x0CB3] | [#x0CB5-#x0CB9] | #x0CDE | [#x0CE0-#x0CE1] |
+[#x0D05-#x0D0C] | [#x0D0E-#x0D10] | [#x0D12-#x0D28] | [#x0D2A-#x0D39] |
+[#x0D60-#x0D61] | [#x0E01-#x0E2E] | #x0E30 | [#x0E32-#x0E33] |
+[#x0E40-#x0E45] | [#x0E81-#x0E82] | #x0E84 | [#x0E87-#x0E88] | #x0E8A |
+#x0E8D | [#x0E94-#x0E97] | [#x0E99-#x0E9F] | [#x0EA1-#x0EA3] | #x0EA5 |
+#x0EA7 | [#x0EAA-#x0EAB] | [#x0EAD-#x0EAE] | #x0EB0 | [#x0EB2-#x0EB3] |
+#x0EBD | [#x0EC0-#x0EC4] | [#x0F40-#x0F47] | [#x0F49-#x0F69] |
+[#x10A0-#x10C5] | [#x10D0-#x10F6] | #x1100 | [#x1102-#x1103] |
+[#x1105-#x1107] | #x1109 | [#x110B-#x110C] | [#x110E-#x1112] | #x113C |
+#x113E | #x1140 | #x114C | #x114E | #x1150 | [#x1154-#x1155] | #x1159 |
+[#x115F-#x1161] | #x1163 | #x1165 | #x1167 | #x1169 | [#x116D-#x116E] |
+[#x1172-#x1173] | #x1175 | #x119E | #x11A8 | #x11AB | [#x11AE-#x11AF] |
+[#x11B7-#x11B8] | #x11BA | [#x11BC-#x11C2] | #x11EB | #x11F0 | #x11F9 |
+[#x1E00-#x1E9B] | [#x1EA0-#x1EF9] | [#x1F00-#x1F15] | [#x1F18-#x1F1D] |
+[#x1F20-#x1F45] | [#x1F48-#x1F4D] | [#x1F50-#x1F57] | #x1F59 | #x1F5B |
+#x1F5D | [#x1F5F-#x1F7D] | [#x1F80-#x1FB4] | [#x1FB6-#x1FBC] | #x1FBE |
+[#x1FC2-#x1FC4] | [#x1FC6-#x1FCC] | [#x1FD0-#x1FD3] | [#x1FD6-#x1FDB] |
+[#x1FE0-#x1FEC] | [#x1FF2-#x1FF4] | [#x1FF6-#x1FFC] | #x2126 |
+[#x212A-#x212B] | #x212E | [#x2180-#x2182] | [#x3041-#x3094] |
+[#x30A1-#x30FA] | [#x3105-#x312C] | [#xAC00-#xD7A3]"""
+
+ideographic = """[#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029]"""
+
+combiningCharacter = """
+[#x0300-#x0345] | [#x0360-#x0361] | [#x0483-#x0486] | [#x0591-#x05A1] |
+[#x05A3-#x05B9] | [#x05BB-#x05BD] | #x05BF | [#x05C1-#x05C2] | #x05C4 |
+[#x064B-#x0652] | #x0670 | [#x06D6-#x06DC] | [#x06DD-#x06DF] |
+[#x06E0-#x06E4] | [#x06E7-#x06E8] | [#x06EA-#x06ED] | [#x0901-#x0903] |
+#x093C | [#x093E-#x094C] | #x094D | [#x0951-#x0954] | [#x0962-#x0963] |
+[#x0981-#x0983] | #x09BC | #x09BE | #x09BF | [#x09C0-#x09C4] |
+[#x09C7-#x09C8] | [#x09CB-#x09CD] | #x09D7 | [#x09E2-#x09E3] | #x0A02 |
+#x0A3C | #x0A3E | #x0A3F | [#x0A40-#x0A42] | [#x0A47-#x0A48] |
+[#x0A4B-#x0A4D] | [#x0A70-#x0A71] | [#x0A81-#x0A83] | #x0ABC |
+[#x0ABE-#x0AC5] | [#x0AC7-#x0AC9] | [#x0ACB-#x0ACD] | [#x0B01-#x0B03] |
+#x0B3C | [#x0B3E-#x0B43] | [#x0B47-#x0B48] | [#x0B4B-#x0B4D] |
+[#x0B56-#x0B57] | [#x0B82-#x0B83] | [#x0BBE-#x0BC2] | [#x0BC6-#x0BC8] |
+[#x0BCA-#x0BCD] | #x0BD7 | [#x0C01-#x0C03] | [#x0C3E-#x0C44] |
+[#x0C46-#x0C48] | [#x0C4A-#x0C4D] | [#x0C55-#x0C56] | [#x0C82-#x0C83] |
+[#x0CBE-#x0CC4] | [#x0CC6-#x0CC8] | [#x0CCA-#x0CCD] | [#x0CD5-#x0CD6] |
+[#x0D02-#x0D03] | [#x0D3E-#x0D43] | [#x0D46-#x0D48] | [#x0D4A-#x0D4D] |
+#x0D57 | #x0E31 | [#x0E34-#x0E3A] | [#x0E47-#x0E4E] | #x0EB1 |
+[#x0EB4-#x0EB9] | [#x0EBB-#x0EBC] | [#x0EC8-#x0ECD] | [#x0F18-#x0F19] |
+#x0F35 | #x0F37 | #x0F39 | #x0F3E | #x0F3F | [#x0F71-#x0F84] |
+[#x0F86-#x0F8B] | [#x0F90-#x0F95] | #x0F97 | [#x0F99-#x0FAD] |
+[#x0FB1-#x0FB7] | #x0FB9 | [#x20D0-#x20DC] | #x20E1 | [#x302A-#x302F] |
+#x3099 | #x309A"""
+
+digit = """
+[#x0030-#x0039] | [#x0660-#x0669] | [#x06F0-#x06F9] | [#x0966-#x096F] |
+[#x09E6-#x09EF] | [#x0A66-#x0A6F] | [#x0AE6-#x0AEF] | [#x0B66-#x0B6F] |
+[#x0BE7-#x0BEF] | [#x0C66-#x0C6F] | [#x0CE6-#x0CEF] | [#x0D66-#x0D6F] |
+[#x0E50-#x0E59] | [#x0ED0-#x0ED9] | [#x0F20-#x0F29]"""
+
+extender = """
+#x00B7 | #x02D0 | #x02D1 | #x0387 | #x0640 | #x0E46 | #x0EC6 | #x3005 |
+#[#x3031-#x3035] | [#x309D-#x309E] | [#x30FC-#x30FE]"""
+
+letter = " | ".join([baseChar, ideographic])
+
+# Without the
+name = " | ".join([letter, digit, ".", "-", "_", combiningCharacter,
+                   extender])
+nameFirst = " | ".join([letter, "_"])
+
+reChar = re.compile(r"#x([\d|A-F]{4,4})")
+reCharRange = re.compile(r"\[#x([\d|A-F]{4,4})-#x([\d|A-F]{4,4})\]")
+
+
+def charStringToList(chars):
+    charRanges = [item.strip() for item in chars.split(" | ")]
+    rv = []
+    for item in charRanges:
+        foundMatch = False
+        for regexp in (reChar, reCharRange):
+            match = regexp.match(item)
+            if match is not None:
+                rv.append([hexToInt(item) for item in match.groups()])
+                if len(rv[-1]) == 1:
+                    rv[-1] = rv[-1] * 2
+                foundMatch = True
+                break
+        if not foundMatch:
+            assert len(item) == 1
+
+            rv.append([ord(item)] * 2)
+    rv = normaliseCharList(rv)
+    return rv
+
+
+def normaliseCharList(charList):
+    charList = sorted(charList)
+    for item in charList:
+        assert item[1] >= item[0]
+    rv = []
+    i = 0
+    while i < len(charList):
+        j = 1
+        rv.append(charList[i])
+        while i + j < len(charList) and charList[i + j][0] <= rv[-1][1] + 1:
+            rv[-1][1] = charList[i + j][1]
+            j += 1
+        i += j
+    return rv
+
+# We don't really support characters above the BMP :(
+max_unicode = int("FFFF", 16)
+
+
+def missingRanges(charList):
+    rv = []
+    if charList[0] != 0:
+        rv.append([0, charList[0][0] - 1])
+    for i, item in enumerate(charList[:-1]):
+        rv.append([item[1] + 1, charList[i + 1][0] - 1])
+    if charList[-1][1] != max_unicode:
+        rv.append([charList[-1][1] + 1, max_unicode])
+    return rv
+
+
+def listToRegexpStr(charList):
+    rv = []
+    for item in charList:
+        if item[0] == item[1]:
+            rv.append(escapeRegexp(chr(item[0])))
+        else:
+            rv.append(escapeRegexp(chr(item[0])) + "-" +
+                      escapeRegexp(chr(item[1])))
+    return "[%s]" % "".join(rv)
+
+
+def hexToInt(hex_str):
+    return int(hex_str, 16)
+
+
+def escapeRegexp(string):
+    specialCharacters = (".", "^", "$", "*", "+", "?", "{", "}",
+                         "[", "]", "|", "(", ")", "-")
+    for char in specialCharacters:
+        string = string.replace(char, "\\" + char)
+
+    return string
+
+# output from the above
+nonXmlNameBMPRegexp = re.compile('[\x00-,/:-@\\[-\\^`\\{-\xb6\xb8-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u02cf\u02d2-\u02ff\u0346-\u035f\u0362-\u0385\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482\u0487-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u0590\u05a2\u05ba\u05be\u05c0\u05c3\u05c5-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u063f\u0653-\u065f\u066a-\u066f\u06b8-\u06b9\u06bf\u06cf\u06d4\u06e9\u06ee-\u06ef\u06fa-\u0900\u0904\u093a-\u093b\u094e-\u0950\u0955-\u0957\u0964-\u0965\u0970-\u0980\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09bb\u09bd\u09c5-\u09c6\u09c9-\u09ca\u09ce-\u09d6\u09d8-\u09db\u09de\u09e4-\u09e5\u09f2-\u0a01\u0a03-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a3b\u0a3d\u0a43-\u0a46\u0a49-\u0a4a\u0a4e-\u0a58\u0a5d\u0a5f-\u0a65\u0a75-\u0a80\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abb\u0ac6\u0aca\u0ace-\u0adf\u0ae1-\u0ae5\u0af0-\u0b00\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3b\u0b44-\u0b46\u0b49-\u0b4a\u0b4e-\u0b55\u0b58-\u0b5b\u0b5e\u0b62-\u0b65\u0b70-\u0b81\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0bbd\u0bc3-\u0bc5\u0bc9\u0bce-\u0bd6\u0bd8-\u0be6\u0bf0-\u0c00\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c3d\u0c45\u0c49\u0c4e-\u0c54\u0c57-\u0c5f\u0c62-\u0c65\u0c70-\u0c81\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cbd\u0cc5\u0cc9\u0cce-\u0cd4\u0cd7-\u0cdd\u0cdf\u0ce2-\u0ce5\u0cf0-\u0d01\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d3d\u0d44-\u0d45\u0d49\u0d4e-\u0d56\u0d58-\u0d5f\u0d62-\u0d65\u0d70-\u0e00\u0e2f\u0e3b-\u0e3f\u0e4f\u0e5a-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eba\u0ebe-\u0ebf\u0ec5\u0ec7\u0ece-\u0ecf\u0eda-\u0f17\u0f1a-\u0f1f\u0f2a-\u0f34\u0f36\u0f38\u0f3a-\u0f3d\u0f48\u0f6a-\u0f70\u0f85\u0f8c-\u0f8f\u0f96\u0f98\u0fae-\u0fb0\u0fb8\u0fba-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u20cf\u20dd-\u20e0\u20e2-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3004\u3006\u3008-\u3020\u3030\u3036-\u3040\u3095-\u3098\u309b-\u309c\u309f-\u30a0\u30fb\u30ff-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
+
+nonXmlNameFirstBMPRegexp = re.compile('[\x00-@\\[-\\^`\\{-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u0385\u0387\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u0640\u064b-\u0670\u06b8-\u06b9\u06bf\u06cf\u06d4\u06d6-\u06e4\u06e7-\u0904\u093a-\u093c\u093e-\u0957\u0962-\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09db\u09de\u09e2-\u09ef\u09f2-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a58\u0a5d\u0a5f-\u0a71\u0a75-\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abc\u0abe-\u0adf\u0ae1-\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3c\u0b3e-\u0b5b\u0b5e\u0b62-\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c5f\u0c62-\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cdd\u0cdf\u0ce2-\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d5f\u0d62-\u0e00\u0e2f\u0e31\u0e34-\u0e3f\u0e46-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eb1\u0eb4-\u0ebc\u0ebe-\u0ebf\u0ec5-\u0f3f\u0f48\u0f6a-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3006\u3008-\u3020\u302a-\u3040\u3095-\u30a0\u30fb-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
+
+# Simpler things
+nonPubidCharRegexp = re.compile("[^\x20\x0D\x0Aa-zA-Z0-9\\-'()+,./:=?;!*#@$_%]")
+
+
+class InfosetFilter(object):
+    replacementRegexp = re.compile(r"U[\dA-F]{5,5}")
+
+    def __init__(self,
+                 dropXmlnsLocalName=False,
+                 dropXmlnsAttrNs=False,
+                 preventDoubleDashComments=False,
+                 preventDashAtCommentEnd=False,
+                 replaceFormFeedCharacters=True,
+                 preventSingleQuotePubid=False):
+
+        self.dropXmlnsLocalName = dropXmlnsLocalName
+        self.dropXmlnsAttrNs = dropXmlnsAttrNs
+
+        self.preventDoubleDashComments = preventDoubleDashComments
+        self.preventDashAtCommentEnd = preventDashAtCommentEnd
+
+        self.replaceFormFeedCharacters = replaceFormFeedCharacters
+
+        self.preventSingleQuotePubid = preventSingleQuotePubid
+
+        self.replaceCache = {}
+
+    def coerceAttribute(self, name, namespace=None):
+        if self.dropXmlnsLocalName and name.startswith("xmlns:"):
+            warnings.warn("Attributes cannot begin with xmlns", DataLossWarning)
+            return None
+        elif (self.dropXmlnsAttrNs and
+              namespace == "http://www.w3.org/2000/xmlns/"):
+            warnings.warn("Attributes cannot be in the xml namespace", DataLossWarning)
+            return None
+        else:
+            return self.toXmlName(name)
+
+    def coerceElement(self, name):
+        return self.toXmlName(name)
+
+    def coerceComment(self, data):
+        if self.preventDoubleDashComments:
+            while "--" in data:
+                warnings.warn("Comments cannot contain adjacent dashes", DataLossWarning)
+                data = data.replace("--", "- -")
+            if data.endswith("-"):
+                warnings.warn("Comments cannot end in a dash", DataLossWarning)
+                data += " "
+        return data
+
+    def coerceCharacters(self, data):
+        if self.replaceFormFeedCharacters:
+            for _ in range(data.count("\x0C")):
+                warnings.warn("Text cannot contain U+000C", DataLossWarning)
+            data = data.replace("\x0C", " ")
+        # Other non-xml characters
+        return data
+
+    def coercePubid(self, data):
+        dataOutput = data
+        for char in nonPubidCharRegexp.findall(data):
+            warnings.warn("Coercing non-XML pubid", DataLossWarning)
+            replacement = self.getReplacementCharacter(char)
+            dataOutput = dataOutput.replace(char, replacement)
+        if self.preventSingleQuotePubid and dataOutput.find("'") >= 0:
+            warnings.warn("Pubid cannot contain single quote", DataLossWarning)
+            dataOutput = dataOutput.replace("'", self.getReplacementCharacter("'"))
+        return dataOutput
+
+    def toXmlName(self, name):
+        nameFirst = name[0]
+        nameRest = name[1:]
+        m = nonXmlNameFirstBMPRegexp.match(nameFirst)
+        if m:
+            warnings.warn("Coercing non-XML name", DataLossWarning)
+            nameFirstOutput = self.getReplacementCharacter(nameFirst)
+        else:
+            nameFirstOutput = nameFirst
+
+        nameRestOutput = nameRest
+        replaceChars = set(nonXmlNameBMPRegexp.findall(nameRest))
+        for char in replaceChars:
+            warnings.warn("Coercing non-XML name", DataLossWarning)
+            replacement = self.getReplacementCharacter(char)
+            nameRestOutput = nameRestOutput.replace(char, replacement)
+        return nameFirstOutput + nameRestOutput
+
+    def getReplacementCharacter(self, char):
+        if char in self.replaceCache:
+            replacement = self.replaceCache[char]
+        else:
+            replacement = self.escapeChar(char)
+        return replacement
+
+    def fromXmlName(self, name):
+        for item in set(self.replacementRegexp.findall(name)):
+            name = name.replace(item, self.unescapeChar(item))
+        return name
+
+    def escapeChar(self, char):
+        replacement = "U%05X" % ord(char)
+        self.replaceCache[char] = replacement
+        return replacement
+
+    def unescapeChar(self, charcode):
+        return chr(int(charcode[1:], 16))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_inputstream.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_inputstream.py
new file mode 100644
index 00000000..a65e55f6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_inputstream.py
@@ -0,0 +1,923 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import text_type, binary_type
+from pip._vendor.six.moves import http_client, urllib
+
+import codecs
+import re
+
+from pip._vendor import webencodings
+
+from .constants import EOF, spaceCharacters, asciiLetters, asciiUppercase
+from .constants import _ReparseException
+from . import _utils
+
+from io import StringIO
+
+try:
+    from io import BytesIO
+except ImportError:
+    BytesIO = StringIO
+
+# Non-unicode versions of constants for use in the pre-parser
+spaceCharactersBytes = frozenset([item.encode("ascii") for item in spaceCharacters])
+asciiLettersBytes = frozenset([item.encode("ascii") for item in asciiLetters])
+asciiUppercaseBytes = frozenset([item.encode("ascii") for item in asciiUppercase])
+spacesAngleBrackets = spaceCharactersBytes | frozenset([b">", b"<"])
+
+
+invalid_unicode_no_surrogate = "[\u0001-\u0008\u000B\u000E-\u001F\u007F-\u009F\uFDD0-\uFDEF\uFFFE\uFFFF\U0001FFFE\U0001FFFF\U0002FFFE\U0002FFFF\U0003FFFE\U0003FFFF\U0004FFFE\U0004FFFF\U0005FFFE\U0005FFFF\U0006FFFE\U0006FFFF\U0007FFFE\U0007FFFF\U0008FFFE\U0008FFFF\U0009FFFE\U0009FFFF\U000AFFFE\U000AFFFF\U000BFFFE\U000BFFFF\U000CFFFE\U000CFFFF\U000DFFFE\U000DFFFF\U000EFFFE\U000EFFFF\U000FFFFE\U000FFFFF\U0010FFFE\U0010FFFF]"  # noqa
+
+if _utils.supports_lone_surrogates:
+    # Use one extra step of indirection and create surrogates with
+    # eval. Not using this indirection would introduce an illegal
+    # unicode literal on platforms not supporting such lone
+    # surrogates.
+    assert invalid_unicode_no_surrogate[-1] == "]" and invalid_unicode_no_surrogate.count("]") == 1
+    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate[:-1] +
+                                    eval('"\\uD800-\\uDFFF"') +  # pylint:disable=eval-used
+                                    "]")
+else:
+    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate)
+
+non_bmp_invalid_codepoints = set([0x1FFFE, 0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
+                                  0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE, 0x5FFFF,
+                                  0x6FFFE, 0x6FFFF, 0x7FFFE, 0x7FFFF, 0x8FFFE,
+                                  0x8FFFF, 0x9FFFE, 0x9FFFF, 0xAFFFE, 0xAFFFF,
+                                  0xBFFFE, 0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
+                                  0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE, 0xFFFFF,
+                                  0x10FFFE, 0x10FFFF])
+
+ascii_punctuation_re = re.compile("[\u0009-\u000D\u0020-\u002F\u003A-\u0040\u005C\u005B-\u0060\u007B-\u007E]")
+
+# Cache for charsUntil()
+charsUntilRegEx = {}
+
+
+class BufferedStream(object):
+    """Buffering for streams that do not have buffering of their own
+
+    The buffer is implemented as a list of chunks on the assumption that
+    joining many strings will be slow since it is O(n**2)
+    """
+
+    def __init__(self, stream):
+        self.stream = stream
+        self.buffer = []
+        self.position = [-1, 0]  # chunk number, offset
+
+    def tell(self):
+        pos = 0
+        for chunk in self.buffer[:self.position[0]]:
+            pos += len(chunk)
+        pos += self.position[1]
+        return pos
+
+    def seek(self, pos):
+        assert pos <= self._bufferedBytes()
+        offset = pos
+        i = 0
+        while len(self.buffer[i]) < offset:
+            offset -= len(self.buffer[i])
+            i += 1
+        self.position = [i, offset]
+
+    def read(self, bytes):
+        if not self.buffer:
+            return self._readStream(bytes)
+        elif (self.position[0] == len(self.buffer) and
+              self.position[1] == len(self.buffer[-1])):
+            return self._readStream(bytes)
+        else:
+            return self._readFromBuffer(bytes)
+
+    def _bufferedBytes(self):
+        return sum([len(item) for item in self.buffer])
+
+    def _readStream(self, bytes):
+        data = self.stream.read(bytes)
+        self.buffer.append(data)
+        self.position[0] += 1
+        self.position[1] = len(data)
+        return data
+
+    def _readFromBuffer(self, bytes):
+        remainingBytes = bytes
+        rv = []
+        bufferIndex = self.position[0]
+        bufferOffset = self.position[1]
+        while bufferIndex < len(self.buffer) and remainingBytes != 0:
+            assert remainingBytes > 0
+            bufferedData = self.buffer[bufferIndex]
+
+            if remainingBytes <= len(bufferedData) - bufferOffset:
+                bytesToRead = remainingBytes
+                self.position = [bufferIndex, bufferOffset + bytesToRead]
+            else:
+                bytesToRead = len(bufferedData) - bufferOffset
+                self.position = [bufferIndex, len(bufferedData)]
+                bufferIndex += 1
+            rv.append(bufferedData[bufferOffset:bufferOffset + bytesToRead])
+            remainingBytes -= bytesToRead
+
+            bufferOffset = 0
+
+        if remainingBytes:
+            rv.append(self._readStream(remainingBytes))
+
+        return b"".join(rv)
+
+
+def HTMLInputStream(source, **kwargs):
+    # Work around Python bug #20007: read(0) closes the connection.
+    # http://bugs.python.org/issue20007
+    if (isinstance(source, http_client.HTTPResponse) or
+        # Also check for addinfourl wrapping HTTPResponse
+        (isinstance(source, urllib.response.addbase) and
+         isinstance(source.fp, http_client.HTTPResponse))):
+        isUnicode = False
+    elif hasattr(source, "read"):
+        isUnicode = isinstance(source.read(0), text_type)
+    else:
+        isUnicode = isinstance(source, text_type)
+
+    if isUnicode:
+        encodings = [x for x in kwargs if x.endswith("_encoding")]
+        if encodings:
+            raise TypeError("Cannot set an encoding with a unicode input, set %r" % encodings)
+
+        return HTMLUnicodeInputStream(source, **kwargs)
+    else:
+        return HTMLBinaryInputStream(source, **kwargs)
+
+
+class HTMLUnicodeInputStream(object):
+    """Provides a unicode stream of characters to the HTMLTokenizer.
+
+    This class takes care of character encoding and removing or replacing
+    incorrect byte-sequences and also provides column and line tracking.
+
+    """
+
+    _defaultChunkSize = 10240
+
+    def __init__(self, source):
+        """Initialises the HTMLInputStream.
+
+        HTMLInputStream(source, [encoding]) -> Normalized stream from source
+        for use by html5lib.
+
+        source can be either a file-object, local filename or a string.
+
+        The optional encoding parameter must be a string that indicates
+        the encoding.  If specified, that encoding will be used,
+        regardless of any BOM or later declaration (such as in a meta
+        element)
+
+        """
+
+        if not _utils.supports_lone_surrogates:
+            # Such platforms will have already checked for such
+            # surrogate errors, so no need to do this checking.
+            self.reportCharacterErrors = None
+        elif len("\U0010FFFF") == 1:
+            self.reportCharacterErrors = self.characterErrorsUCS4
+        else:
+            self.reportCharacterErrors = self.characterErrorsUCS2
+
+        # List of where new lines occur
+        self.newLines = [0]
+
+        self.charEncoding = (lookupEncoding("utf-8"), "certain")
+        self.dataStream = self.openStream(source)
+
+        self.reset()
+
+    def reset(self):
+        self.chunk = ""
+        self.chunkSize = 0
+        self.chunkOffset = 0
+        self.errors = []
+
+        # number of (complete) lines in previous chunks
+        self.prevNumLines = 0
+        # number of columns in the last line of the previous chunk
+        self.prevNumCols = 0
+
+        # Deal with CR LF and surrogates split over chunk boundaries
+        self._bufferedCharacter = None
+
+    def openStream(self, source):
+        """Produces a file object from source.
+
+        source can be either a file object, local filename or a string.
+
+        """
+        # Already a file object
+        if hasattr(source, 'read'):
+            stream = source
+        else:
+            stream = StringIO(source)
+
+        return stream
+
+    def _position(self, offset):
+        chunk = self.chunk
+        nLines = chunk.count('\n', 0, offset)
+        positionLine = self.prevNumLines + nLines
+        lastLinePos = chunk.rfind('\n', 0, offset)
+        if lastLinePos == -1:
+            positionColumn = self.prevNumCols + offset
+        else:
+            positionColumn = offset - (lastLinePos + 1)
+        return (positionLine, positionColumn)
+
+    def position(self):
+        """Returns (line, col) of the current position in the stream."""
+        line, col = self._position(self.chunkOffset)
+        return (line + 1, col)
+
+    def char(self):
+        """ Read one character from the stream or queue if available. Return
+            EOF when EOF is reached.
+        """
+        # Read a new chunk from the input stream if necessary
+        if self.chunkOffset >= self.chunkSize:
+            if not self.readChunk():
+                return EOF
+
+        chunkOffset = self.chunkOffset
+        char = self.chunk[chunkOffset]
+        self.chunkOffset = chunkOffset + 1
+
+        return char
+
+    def readChunk(self, chunkSize=None):
+        if chunkSize is None:
+            chunkSize = self._defaultChunkSize
+
+        self.prevNumLines, self.prevNumCols = self._position(self.chunkSize)
+
+        self.chunk = ""
+        self.chunkSize = 0
+        self.chunkOffset = 0
+
+        data = self.dataStream.read(chunkSize)
+
+        # Deal with CR LF and surrogates broken across chunks
+        if self._bufferedCharacter:
+            data = self._bufferedCharacter + data
+            self._bufferedCharacter = None
+        elif not data:
+            # We have no more data, bye-bye stream
+            return False
+
+        if len(data) > 1:
+            lastv = ord(data[-1])
+            if lastv == 0x0D or 0xD800 <= lastv <= 0xDBFF:
+                self._bufferedCharacter = data[-1]
+                data = data[:-1]
+
+        if self.reportCharacterErrors:
+            self.reportCharacterErrors(data)
+
+        # Replace invalid characters
+        data = data.replace("\r\n", "\n")
+        data = data.replace("\r", "\n")
+
+        self.chunk = data
+        self.chunkSize = len(data)
+
+        return True
+
+    def characterErrorsUCS4(self, data):
+        for _ in range(len(invalid_unicode_re.findall(data))):
+            self.errors.append("invalid-codepoint")
+
+    def characterErrorsUCS2(self, data):
+        # Someone picked the wrong compile option
+        # You lose
+        skip = False
+        for match in invalid_unicode_re.finditer(data):
+            if skip:
+                continue
+            codepoint = ord(match.group())
+            pos = match.start()
+            # Pretty sure there should be endianness issues here
+            if _utils.isSurrogatePair(data[pos:pos + 2]):
+                # We have a surrogate pair!
+                char_val = _utils.surrogatePairToCodepoint(data[pos:pos + 2])
+                if char_val in non_bmp_invalid_codepoints:
+                    self.errors.append("invalid-codepoint")
+                skip = True
+            elif (codepoint >= 0xD800 and codepoint <= 0xDFFF and
+                  pos == len(data) - 1):
+                self.errors.append("invalid-codepoint")
+            else:
+                skip = False
+                self.errors.append("invalid-codepoint")
+
+    def charsUntil(self, characters, opposite=False):
+        """ Returns a string of characters from the stream up to but not
+        including any character in 'characters' or EOF. 'characters' must be
+        a container that supports the 'in' method and iteration over its
+        characters.
+        """
+
+        # Use a cache of regexps to find the required characters
+        try:
+            chars = charsUntilRegEx[(characters, opposite)]
+        except KeyError:
+            if __debug__:
+                for c in characters:
+                    assert(ord(c) < 128)
+            regex = "".join(["\\x%02x" % ord(c) for c in characters])
+            if not opposite:
+                regex = "^%s" % regex
+            chars = charsUntilRegEx[(characters, opposite)] = re.compile("[%s]+" % regex)
+
+        rv = []
+
+        while True:
+            # Find the longest matching prefix
+            m = chars.match(self.chunk, self.chunkOffset)
+            if m is None:
+                # If nothing matched, and it wasn't because we ran out of chunk,
+                # then stop
+                if self.chunkOffset != self.chunkSize:
+                    break
+            else:
+                end = m.end()
+                # If not the whole chunk matched, return everything
+                # up to the part that didn't match
+                if end != self.chunkSize:
+                    rv.append(self.chunk[self.chunkOffset:end])
+                    self.chunkOffset = end
+                    break
+            # If the whole remainder of the chunk matched,
+            # use it all and read the next chunk
+            rv.append(self.chunk[self.chunkOffset:])
+            if not self.readChunk():
+                # Reached EOF
+                break
+
+        r = "".join(rv)
+        return r
+
+    def unget(self, char):
+        # Only one character is allowed to be ungotten at once - it must
+        # be consumed again before any further call to unget
+        if char is not None:
+            if self.chunkOffset == 0:
+                # unget is called quite rarely, so it's a good idea to do
+                # more work here if it saves a bit of work in the frequently
+                # called char and charsUntil.
+                # So, just prepend the ungotten character onto the current
+                # chunk:
+                self.chunk = char + self.chunk
+                self.chunkSize += 1
+            else:
+                self.chunkOffset -= 1
+                assert self.chunk[self.chunkOffset] == char
+
+
+class HTMLBinaryInputStream(HTMLUnicodeInputStream):
+    """Provides a unicode stream of characters to the HTMLTokenizer.
+
+    This class takes care of character encoding and removing or replacing
+    incorrect byte-sequences and also provides column and line tracking.
+
+    """
+
+    def __init__(self, source, override_encoding=None, transport_encoding=None,
+                 same_origin_parent_encoding=None, likely_encoding=None,
+                 default_encoding="windows-1252", useChardet=True):
+        """Initialises the HTMLInputStream.
+
+        HTMLInputStream(source, [encoding]) -> Normalized stream from source
+        for use by html5lib.
+
+        source can be either a file-object, local filename or a string.
+
+        The optional encoding parameter must be a string that indicates
+        the encoding.  If specified, that encoding will be used,
+        regardless of any BOM or later declaration (such as in a meta
+        element)
+
+        """
+        # Raw Stream - for unicode objects this will encode to utf-8 and set
+        #              self.charEncoding as appropriate
+        self.rawStream = self.openStream(source)
+
+        HTMLUnicodeInputStream.__init__(self, self.rawStream)
+
+        # Encoding Information
+        # Number of bytes to use when looking for a meta element with
+        # encoding information
+        self.numBytesMeta = 1024
+        # Number of bytes to use when using detecting encoding using chardet
+        self.numBytesChardet = 100
+        # Things from args
+        self.override_encoding = override_encoding
+        self.transport_encoding = transport_encoding
+        self.same_origin_parent_encoding = same_origin_parent_encoding
+        self.likely_encoding = likely_encoding
+        self.default_encoding = default_encoding
+
+        # Determine encoding
+        self.charEncoding = self.determineEncoding(useChardet)
+        assert self.charEncoding[0] is not None
+
+        # Call superclass
+        self.reset()
+
+    def reset(self):
+        self.dataStream = self.charEncoding[0].codec_info.streamreader(self.rawStream, 'replace')
+        HTMLUnicodeInputStream.reset(self)
+
+    def openStream(self, source):
+        """Produces a file object from source.
+
+        source can be either a file object, local filename or a string.
+
+        """
+        # Already a file object
+        if hasattr(source, 'read'):
+            stream = source
+        else:
+            stream = BytesIO(source)
+
+        try:
+            stream.seek(stream.tell())
+        except:  # pylint:disable=bare-except
+            stream = BufferedStream(stream)
+
+        return stream
+
+    def determineEncoding(self, chardet=True):
+        # BOMs take precedence over everything
+        # This will also read past the BOM if present
+        charEncoding = self.detectBOM(), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # If we've been overriden, we've been overriden
+        charEncoding = lookupEncoding(self.override_encoding), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Now check the transport layer
+        charEncoding = lookupEncoding(self.transport_encoding), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Look for meta elements with encoding information
+        charEncoding = self.detectEncodingMeta(), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Parent document encoding
+        charEncoding = lookupEncoding(self.same_origin_parent_encoding), "tentative"
+        if charEncoding[0] is not None and not charEncoding[0].name.startswith("utf-16"):
+            return charEncoding
+
+        # "likely" encoding
+        charEncoding = lookupEncoding(self.likely_encoding), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Guess with chardet, if available
+        if chardet:
+            try:
+                from pip._vendor.chardet.universaldetector import UniversalDetector
+            except ImportError:
+                pass
+            else:
+                buffers = []
+                detector = UniversalDetector()
+                while not detector.done:
+                    buffer = self.rawStream.read(self.numBytesChardet)
+                    assert isinstance(buffer, bytes)
+                    if not buffer:
+                        break
+                    buffers.append(buffer)
+                    detector.feed(buffer)
+                detector.close()
+                encoding = lookupEncoding(detector.result['encoding'])
+                self.rawStream.seek(0)
+                if encoding is not None:
+                    return encoding, "tentative"
+
+        # Try the default encoding
+        charEncoding = lookupEncoding(self.default_encoding), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Fallback to html5lib's default if even that hasn't worked
+        return lookupEncoding("windows-1252"), "tentative"
+
+    def changeEncoding(self, newEncoding):
+        assert self.charEncoding[1] != "certain"
+        newEncoding = lookupEncoding(newEncoding)
+        if newEncoding is None:
+            return
+        if newEncoding.name in ("utf-16be", "utf-16le"):
+            newEncoding = lookupEncoding("utf-8")
+            assert newEncoding is not None
+        elif newEncoding == self.charEncoding[0]:
+            self.charEncoding = (self.charEncoding[0], "certain")
+        else:
+            self.rawStream.seek(0)
+            self.charEncoding = (newEncoding, "certain")
+            self.reset()
+            raise _ReparseException("Encoding changed from %s to %s" % (self.charEncoding[0], newEncoding))
+
+    def detectBOM(self):
+        """Attempts to detect at BOM at the start of the stream. If
+        an encoding can be determined from the BOM return the name of the
+        encoding otherwise return None"""
+        bomDict = {
+            codecs.BOM_UTF8: 'utf-8',
+            codecs.BOM_UTF16_LE: 'utf-16le', codecs.BOM_UTF16_BE: 'utf-16be',
+            codecs.BOM_UTF32_LE: 'utf-32le', codecs.BOM_UTF32_BE: 'utf-32be'
+        }
+
+        # Go to beginning of file and read in 4 bytes
+        string = self.rawStream.read(4)
+        assert isinstance(string, bytes)
+
+        # Try detecting the BOM using bytes from the string
+        encoding = bomDict.get(string[:3])         # UTF-8
+        seek = 3
+        if not encoding:
+            # Need to detect UTF-32 before UTF-16
+            encoding = bomDict.get(string)         # UTF-32
+            seek = 4
+            if not encoding:
+                encoding = bomDict.get(string[:2])  # UTF-16
+                seek = 2
+
+        # Set the read position past the BOM if one was found, otherwise
+        # set it to the start of the stream
+        if encoding:
+            self.rawStream.seek(seek)
+            return lookupEncoding(encoding)
+        else:
+            self.rawStream.seek(0)
+            return None
+
+    def detectEncodingMeta(self):
+        """Report the encoding declared by the meta element
+        """
+        buffer = self.rawStream.read(self.numBytesMeta)
+        assert isinstance(buffer, bytes)
+        parser = EncodingParser(buffer)
+        self.rawStream.seek(0)
+        encoding = parser.getEncoding()
+
+        if encoding is not None and encoding.name in ("utf-16be", "utf-16le"):
+            encoding = lookupEncoding("utf-8")
+
+        return encoding
+
+
+class EncodingBytes(bytes):
+    """String-like object with an associated position and various extra methods
+    If the position is ever greater than the string length then an exception is
+    raised"""
+    def __new__(self, value):
+        assert isinstance(value, bytes)
+        return bytes.__new__(self, value.lower())
+
+    def __init__(self, value):
+        # pylint:disable=unused-argument
+        self._position = -1
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        p = self._position = self._position + 1
+        if p >= len(self):
+            raise StopIteration
+        elif p < 0:
+            raise TypeError
+        return self[p:p + 1]
+
+    def next(self):
+        # Py2 compat
+        return self.__next__()
+
+    def previous(self):
+        p = self._position
+        if p >= len(self):
+            raise StopIteration
+        elif p < 0:
+            raise TypeError
+        self._position = p = p - 1
+        return self[p:p + 1]
+
+    def setPosition(self, position):
+        if self._position >= len(self):
+            raise StopIteration
+        self._position = position
+
+    def getPosition(self):
+        if self._position >= len(self):
+            raise StopIteration
+        if self._position >= 0:
+            return self._position
+        else:
+            return None
+
+    position = property(getPosition, setPosition)
+
+    def getCurrentByte(self):
+        return self[self.position:self.position + 1]
+
+    currentByte = property(getCurrentByte)
+
+    def skip(self, chars=spaceCharactersBytes):
+        """Skip past a list of characters"""
+        p = self.position               # use property for the error-checking
+        while p < len(self):
+            c = self[p:p + 1]
+            if c not in chars:
+                self._position = p
+                return c
+            p += 1
+        self._position = p
+        return None
+
+    def skipUntil(self, chars):
+        p = self.position
+        while p < len(self):
+            c = self[p:p + 1]
+            if c in chars:
+                self._position = p
+                return c
+            p += 1
+        self._position = p
+        return None
+
+    def matchBytes(self, bytes):
+        """Look for a sequence of bytes at the start of a string. If the bytes
+        are found return True and advance the position to the byte after the
+        match. Otherwise return False and leave the position alone"""
+        p = self.position
+        data = self[p:p + len(bytes)]
+        rv = data.startswith(bytes)
+        if rv:
+            self.position += len(bytes)
+        return rv
+
+    def jumpTo(self, bytes):
+        """Look for the next sequence of bytes matching a given sequence. If
+        a match is found advance the position to the last byte of the match"""
+        newPosition = self[self.position:].find(bytes)
+        if newPosition > -1:
+            # XXX: This is ugly, but I can't see a nicer way to fix this.
+            if self._position == -1:
+                self._position = 0
+            self._position += (newPosition + len(bytes) - 1)
+            return True
+        else:
+            raise StopIteration
+
+
+class EncodingParser(object):
+    """Mini parser for detecting character encoding from meta elements"""
+
+    def __init__(self, data):
+        """string - the data to work on for encoding detection"""
+        self.data = EncodingBytes(data)
+        self.encoding = None
+
+    def getEncoding(self):
+        methodDispatch = (
+            (b"<!--", self.handleComment),
+            (b"<meta", self.handleMeta),
+            (b"</", self.handlePossibleEndTag),
+            (b"<!", self.handleOther),
+            (b"<?", self.handleOther),
+            (b"<", self.handlePossibleStartTag))
+        for _ in self.data:
+            keepParsing = True
+            for key, method in methodDispatch:
+                if self.data.matchBytes(key):
+                    try:
+                        keepParsing = method()
+                        break
+                    except StopIteration:
+                        keepParsing = False
+                        break
+            if not keepParsing:
+                break
+
+        return self.encoding
+
+    def handleComment(self):
+        """Skip over comments"""
+        return self.data.jumpTo(b"-->")
+
+    def handleMeta(self):
+        if self.data.currentByte not in spaceCharactersBytes:
+            # if we have <meta not followed by a space so just keep going
+            return True
+        # We have a valid meta element we want to search for attributes
+        hasPragma = False
+        pendingEncoding = None
+        while True:
+            # Try to find the next attribute after the current position
+            attr = self.getAttribute()
+            if attr is None:
+                return True
+            else:
+                if attr[0] == b"http-equiv":
+                    hasPragma = attr[1] == b"content-type"
+                    if hasPragma and pendingEncoding is not None:
+                        self.encoding = pendingEncoding
+                        return False
+                elif attr[0] == b"charset":
+                    tentativeEncoding = attr[1]
+                    codec = lookupEncoding(tentativeEncoding)
+                    if codec is not None:
+                        self.encoding = codec
+                        return False
+                elif attr[0] == b"content":
+                    contentParser = ContentAttrParser(EncodingBytes(attr[1]))
+                    tentativeEncoding = contentParser.parse()
+                    if tentativeEncoding is not None:
+                        codec = lookupEncoding(tentativeEncoding)
+                        if codec is not None:
+                            if hasPragma:
+                                self.encoding = codec
+                                return False
+                            else:
+                                pendingEncoding = codec
+
+    def handlePossibleStartTag(self):
+        return self.handlePossibleTag(False)
+
+    def handlePossibleEndTag(self):
+        next(self.data)
+        return self.handlePossibleTag(True)
+
+    def handlePossibleTag(self, endTag):
+        data = self.data
+        if data.currentByte not in asciiLettersBytes:
+            # If the next byte is not an ascii letter either ignore this
+            # fragment (possible start tag case) or treat it according to
+            # handleOther
+            if endTag:
+                data.previous()
+                self.handleOther()
+            return True
+
+        c = data.skipUntil(spacesAngleBrackets)
+        if c == b"<":
+            # return to the first step in the overall "two step" algorithm
+            # reprocessing the < byte
+            data.previous()
+        else:
+            # Read all attributes
+            attr = self.getAttribute()
+            while attr is not None:
+                attr = self.getAttribute()
+        return True
+
+    def handleOther(self):
+        return self.data.jumpTo(b">")
+
+    def getAttribute(self):
+        """Return a name,value pair for the next attribute in the stream,
+        if one is found, or None"""
+        data = self.data
+        # Step 1 (skip chars)
+        c = data.skip(spaceCharactersBytes | frozenset([b"/"]))
+        assert c is None or len(c) == 1
+        # Step 2
+        if c in (b">", None):
+            return None
+        # Step 3
+        attrName = []
+        attrValue = []
+        # Step 4 attribute name
+        while True:
+            if c == b"=" and attrName:
+                break
+            elif c in spaceCharactersBytes:
+                # Step 6!
+                c = data.skip()
+                break
+            elif c in (b"/", b">"):
+                return b"".join(attrName), b""
+            elif c in asciiUppercaseBytes:
+                attrName.append(c.lower())
+            elif c is None:
+                return None
+            else:
+                attrName.append(c)
+            # Step 5
+            c = next(data)
+        # Step 7
+        if c != b"=":
+            data.previous()
+            return b"".join(attrName), b""
+        # Step 8
+        next(data)
+        # Step 9
+        c = data.skip()
+        # Step 10
+        if c in (b"'", b'"'):
+            # 10.1
+            quoteChar = c
+            while True:
+                # 10.2
+                c = next(data)
+                # 10.3
+                if c == quoteChar:
+                    next(data)
+                    return b"".join(attrName), b"".join(attrValue)
+                # 10.4
+                elif c in asciiUppercaseBytes:
+                    attrValue.append(c.lower())
+                # 10.5
+                else:
+                    attrValue.append(c)
+        elif c == b">":
+            return b"".join(attrName), b""
+        elif c in asciiUppercaseBytes:
+            attrValue.append(c.lower())
+        elif c is None:
+            return None
+        else:
+            attrValue.append(c)
+        # Step 11
+        while True:
+            c = next(data)
+            if c in spacesAngleBrackets:
+                return b"".join(attrName), b"".join(attrValue)
+            elif c in asciiUppercaseBytes:
+                attrValue.append(c.lower())
+            elif c is None:
+                return None
+            else:
+                attrValue.append(c)
+
+
+class ContentAttrParser(object):
+    def __init__(self, data):
+        assert isinstance(data, bytes)
+        self.data = data
+
+    def parse(self):
+        try:
+            # Check if the attr name is charset
+            # otherwise return
+            self.data.jumpTo(b"charset")
+            self.data.position += 1
+            self.data.skip()
+            if not self.data.currentByte == b"=":
+                # If there is no = sign keep looking for attrs
+                return None
+            self.data.position += 1
+            self.data.skip()
+            # Look for an encoding between matching quote marks
+            if self.data.currentByte in (b'"', b"'"):
+                quoteMark = self.data.currentByte
+                self.data.position += 1
+                oldPosition = self.data.position
+                if self.data.jumpTo(quoteMark):
+                    return self.data[oldPosition:self.data.position]
+                else:
+                    return None
+            else:
+                # Unquoted value
+                oldPosition = self.data.position
+                try:
+                    self.data.skipUntil(spaceCharactersBytes)
+                    return self.data[oldPosition:self.data.position]
+                except StopIteration:
+                    # Return the whole remaining value
+                    return self.data[oldPosition:]
+        except StopIteration:
+            return None
+
+
+def lookupEncoding(encoding):
+    """Return the python codec name corresponding to an encoding or None if the
+    string doesn't correspond to a valid encoding."""
+    if isinstance(encoding, binary_type):
+        try:
+            encoding = encoding.decode("ascii")
+        except UnicodeDecodeError:
+            return None
+
+    if encoding is not None:
+        try:
+            return webencodings.lookup(encoding)
+        except AttributeError:
+            return None
+    else:
+        return None
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_tokenizer.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_tokenizer.py
new file mode 100644
index 00000000..178f6e7f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_tokenizer.py
@@ -0,0 +1,1721 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import unichr as chr
+
+from collections import deque
+
+from .constants import spaceCharacters
+from .constants import entities
+from .constants import asciiLetters, asciiUpper2Lower
+from .constants import digits, hexDigits, EOF
+from .constants import tokenTypes, tagTokenTypes
+from .constants import replacementCharacters
+
+from ._inputstream import HTMLInputStream
+
+from ._trie import Trie
+
+entitiesTrie = Trie(entities)
+
+
+class HTMLTokenizer(object):
+    """ This class takes care of tokenizing HTML.
+
+    * self.currentToken
+      Holds the token that is currently being processed.
+
+    * self.state
+      Holds a reference to the method to be invoked... XXX
+
+    * self.stream
+      Points to HTMLInputStream object.
+    """
+
+    def __init__(self, stream, parser=None, **kwargs):
+
+        self.stream = HTMLInputStream(stream, **kwargs)
+        self.parser = parser
+
+        # Setup the initial tokenizer state
+        self.escapeFlag = False
+        self.lastFourChars = []
+        self.state = self.dataState
+        self.escape = False
+
+        # The current token being created
+        self.currentToken = None
+        super(HTMLTokenizer, self).__init__()
+
+    def __iter__(self):
+        """ This is where the magic happens.
+
+        We do our usually processing through the states and when we have a token
+        to return we yield the token which pauses processing until the next token
+        is requested.
+        """
+        self.tokenQueue = deque([])
+        # Start processing. When EOF is reached self.state will return False
+        # instead of True and the loop will terminate.
+        while self.state():
+            while self.stream.errors:
+                yield {"type": tokenTypes["ParseError"], "data": self.stream.errors.pop(0)}
+            while self.tokenQueue:
+                yield self.tokenQueue.popleft()
+
+    def consumeNumberEntity(self, isHex):
+        """This function returns either U+FFFD or the character based on the
+        decimal or hexadecimal representation. It also discards ";" if present.
+        If not present self.tokenQueue.append({"type": tokenTypes["ParseError"]}) is invoked.
+        """
+
+        allowed = digits
+        radix = 10
+        if isHex:
+            allowed = hexDigits
+            radix = 16
+
+        charStack = []
+
+        # Consume all the characters that are in range while making sure we
+        # don't hit an EOF.
+        c = self.stream.char()
+        while c in allowed and c is not EOF:
+            charStack.append(c)
+            c = self.stream.char()
+
+        # Convert the set of characters consumed to an int.
+        charAsInt = int("".join(charStack), radix)
+
+        # Certain characters get replaced with others
+        if charAsInt in replacementCharacters:
+            char = replacementCharacters[charAsInt]
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "illegal-codepoint-for-numeric-entity",
+                                    "datavars": {"charAsInt": charAsInt}})
+        elif ((0xD800 <= charAsInt <= 0xDFFF) or
+              (charAsInt > 0x10FFFF)):
+            char = "\uFFFD"
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "illegal-codepoint-for-numeric-entity",
+                                    "datavars": {"charAsInt": charAsInt}})
+        else:
+            # Should speed up this check somehow (e.g. move the set to a constant)
+            if ((0x0001 <= charAsInt <= 0x0008) or
+                (0x000E <= charAsInt <= 0x001F) or
+                (0x007F <= charAsInt <= 0x009F) or
+                (0xFDD0 <= charAsInt <= 0xFDEF) or
+                charAsInt in frozenset([0x000B, 0xFFFE, 0xFFFF, 0x1FFFE,
+                                        0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
+                                        0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE,
+                                        0x5FFFF, 0x6FFFE, 0x6FFFF, 0x7FFFE,
+                                        0x7FFFF, 0x8FFFE, 0x8FFFF, 0x9FFFE,
+                                        0x9FFFF, 0xAFFFE, 0xAFFFF, 0xBFFFE,
+                                        0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
+                                        0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE,
+                                        0xFFFFF, 0x10FFFE, 0x10FFFF])):
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data":
+                                        "illegal-codepoint-for-numeric-entity",
+                                        "datavars": {"charAsInt": charAsInt}})
+            try:
+                # Try/except needed as UCS-2 Python builds' unichar only works
+                # within the BMP.
+                char = chr(charAsInt)
+            except ValueError:
+                v = charAsInt - 0x10000
+                char = chr(0xD800 | (v >> 10)) + chr(0xDC00 | (v & 0x3FF))
+
+        # Discard the ; if present. Otherwise, put it back on the queue and
+        # invoke parseError on parser.
+        if c != ";":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "numeric-entity-without-semicolon"})
+            self.stream.unget(c)
+
+        return char
+
+    def consumeEntity(self, allowedChar=None, fromAttribute=False):
+        # Initialise to the default output for when no entity is matched
+        output = "&"
+
+        charStack = [self.stream.char()]
+        if (charStack[0] in spaceCharacters or charStack[0] in (EOF, "<", "&") or
+                (allowedChar is not None and allowedChar == charStack[0])):
+            self.stream.unget(charStack[0])
+
+        elif charStack[0] == "#":
+            # Read the next character to see if it's hex or decimal
+            hex = False
+            charStack.append(self.stream.char())
+            if charStack[-1] in ("x", "X"):
+                hex = True
+                charStack.append(self.stream.char())
+
+            # charStack[-1] should be the first digit
+            if (hex and charStack[-1] in hexDigits) \
+                    or (not hex and charStack[-1] in digits):
+                # At least one digit found, so consume the whole number
+                self.stream.unget(charStack[-1])
+                output = self.consumeNumberEntity(hex)
+            else:
+                # No digits found
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data": "expected-numeric-entity"})
+                self.stream.unget(charStack.pop())
+                output = "&" + "".join(charStack)
+
+        else:
+            # At this point in the process might have named entity. Entities
+            # are stored in the global variable "entities".
+            #
+            # Consume characters and compare to these to a substring of the
+            # entity names in the list until the substring no longer matches.
+            while (charStack[-1] is not EOF):
+                if not entitiesTrie.has_keys_with_prefix("".join(charStack)):
+                    break
+                charStack.append(self.stream.char())
+
+            # At this point we have a string that starts with some characters
+            # that may match an entity
+            # Try to find the longest entity the string will match to take care
+            # of &noti for instance.
+            try:
+                entityName = entitiesTrie.longest_prefix("".join(charStack[:-1]))
+                entityLength = len(entityName)
+            except KeyError:
+                entityName = None
+
+            if entityName is not None:
+                if entityName[-1] != ";":
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                            "named-entity-without-semicolon"})
+                if (entityName[-1] != ";" and fromAttribute and
+                    (charStack[entityLength] in asciiLetters or
+                     charStack[entityLength] in digits or
+                     charStack[entityLength] == "=")):
+                    self.stream.unget(charStack.pop())
+                    output = "&" + "".join(charStack)
+                else:
+                    output = entities[entityName]
+                    self.stream.unget(charStack.pop())
+                    output += "".join(charStack[entityLength:])
+            else:
+                self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                        "expected-named-entity"})
+                self.stream.unget(charStack.pop())
+                output = "&" + "".join(charStack)
+
+        if fromAttribute:
+            self.currentToken["data"][-1][1] += output
+        else:
+            if output in spaceCharacters:
+                tokenType = "SpaceCharacters"
+            else:
+                tokenType = "Characters"
+            self.tokenQueue.append({"type": tokenTypes[tokenType], "data": output})
+
+    def processEntityInAttribute(self, allowedChar):
+        """This method replaces the need for "entityInAttributeValueState".
+        """
+        self.consumeEntity(allowedChar=allowedChar, fromAttribute=True)
+
+    def emitCurrentToken(self):
+        """This method is a generic handler for emitting the tags. It also sets
+        the state to "data" because that's what's needed after a token has been
+        emitted.
+        """
+        token = self.currentToken
+        # Add token to the queue to be yielded
+        if (token["type"] in tagTokenTypes):
+            token["name"] = token["name"].translate(asciiUpper2Lower)
+            if token["type"] == tokenTypes["EndTag"]:
+                if token["data"]:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                            "data": "attributes-in-end-tag"})
+                if token["selfClosing"]:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                            "data": "self-closing-flag-on-end-tag"})
+        self.tokenQueue.append(token)
+        self.state = self.dataState
+
+    # Below are the various tokenizer states worked out.
+    def dataState(self):
+        data = self.stream.char()
+        if data == "&":
+            self.state = self.entityDataState
+        elif data == "<":
+            self.state = self.tagOpenState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\u0000"})
+        elif data is EOF:
+            # Tokenization ends.
+            return False
+        elif data in spaceCharacters:
+            # Directly after emitting a token you switch back to the "data
+            # state". At that point spaceCharacters are important so they are
+            # emitted separately.
+            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
+                                    data + self.stream.charsUntil(spaceCharacters, True)})
+            # No need to update lastFourChars here, since the first space will
+            # have already been appended to lastFourChars and will have broken
+            # any <!-- or --> sequences
+        else:
+            chars = self.stream.charsUntil(("&", "<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def entityDataState(self):
+        self.consumeEntity()
+        self.state = self.dataState
+        return True
+
+    def rcdataState(self):
+        data = self.stream.char()
+        if data == "&":
+            self.state = self.characterReferenceInRcdata
+        elif data == "<":
+            self.state = self.rcdataLessThanSignState
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data in spaceCharacters:
+            # Directly after emitting a token you switch back to the "data
+            # state". At that point spaceCharacters are important so they are
+            # emitted separately.
+            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
+                                    data + self.stream.charsUntil(spaceCharacters, True)})
+            # No need to update lastFourChars here, since the first space will
+            # have already been appended to lastFourChars and will have broken
+            # any <!-- or --> sequences
+        else:
+            chars = self.stream.charsUntil(("&", "<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def characterReferenceInRcdata(self):
+        self.consumeEntity()
+        self.state = self.rcdataState
+        return True
+
+    def rawtextState(self):
+        data = self.stream.char()
+        if data == "<":
+            self.state = self.rawtextLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        else:
+            chars = self.stream.charsUntil(("<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def scriptDataState(self):
+        data = self.stream.char()
+        if data == "<":
+            self.state = self.scriptDataLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        else:
+            chars = self.stream.charsUntil(("<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def plaintextState(self):
+        data = self.stream.char()
+        if data == EOF:
+            # Tokenization ends.
+            return False
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + self.stream.charsUntil("\u0000")})
+        return True
+
+    def tagOpenState(self):
+        data = self.stream.char()
+        if data == "!":
+            self.state = self.markupDeclarationOpenState
+        elif data == "/":
+            self.state = self.closeTagOpenState
+        elif data in asciiLetters:
+            self.currentToken = {"type": tokenTypes["StartTag"],
+                                 "name": data, "data": [],
+                                 "selfClosing": False,
+                                 "selfClosingAcknowledged": False}
+            self.state = self.tagNameState
+        elif data == ">":
+            # XXX In theory it could be something besides a tag name. But
+            # do we really care?
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name-but-got-right-bracket"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<>"})
+            self.state = self.dataState
+        elif data == "?":
+            # XXX In theory it could be something besides a tag name. But
+            # do we really care?
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name-but-got-question-mark"})
+            self.stream.unget(data)
+            self.state = self.bogusCommentState
+        else:
+            # XXX
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        return True
+
+    def closeTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.currentToken = {"type": tokenTypes["EndTag"], "name": data,
+                                 "data": [], "selfClosing": False}
+            self.state = self.tagNameState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-right-bracket"})
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-eof"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.state = self.dataState
+        else:
+            # XXX data can be _'_...
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-char",
+                                    "datavars": {"data": data}})
+            self.stream.unget(data)
+            self.state = self.bogusCommentState
+        return True
+
+    def tagNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-tag-name"})
+            self.state = self.dataState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] += "\uFFFD"
+        else:
+            self.currentToken["name"] += data
+            # (Don't use charsUntil here, because tag names are
+            # very short and it's faster to not do anything fancy)
+        return True
+
+    def rcdataLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.rcdataEndTagOpenState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rcdataEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.rcdataEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rcdataEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rawtextLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.rawtextEndTagOpenState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def rawtextEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.rawtextEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def rawtextEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def scriptDataLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataEndTagOpenState
+        elif data == "!":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<!"})
+            self.state = self.scriptDataEscapeStartState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.scriptDataEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapeStartState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapeStartDashState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapeStartDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashDashState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapedState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashState
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            chars = self.stream.charsUntil(("<", "-", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def scriptDataEscapedDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashDashState
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataEscapedState
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedDashDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
+            self.state = self.scriptDataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataEscapedState
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataEscapedEndTagOpenState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<" + data})
+            self.temporaryBuffer = data
+            self.state = self.scriptDataDoubleEscapeStartState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer = data
+            self.state = self.scriptDataEscapedEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataDoubleEscapeStartState(self):
+        data = self.stream.char()
+        if data in (spaceCharacters | frozenset(("/", ">"))):
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            if self.temporaryBuffer.lower() == "script":
+                self.state = self.scriptDataDoubleEscapedState
+            else:
+                self.state = self.scriptDataEscapedState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.temporaryBuffer += data
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataDoubleEscapedState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataDoubleEscapedDashState
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+        return True
+
+    def scriptDataDoubleEscapedDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataDoubleEscapedDashDashState
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataDoubleEscapedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapedDashDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
+            self.state = self.scriptDataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataDoubleEscapedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapedLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "/"})
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataDoubleEscapeEndState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapeEndState(self):
+        data = self.stream.char()
+        if data in (spaceCharacters | frozenset(("/", ">"))):
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            if self.temporaryBuffer.lower() == "script":
+                self.state = self.scriptDataEscapedState
+            else:
+                self.state = self.scriptDataDoubleEscapedState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.temporaryBuffer += data
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def beforeAttributeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data in asciiLetters:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data in ("'", '"', "=", "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "invalid-character-in-attribute-name"})
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"].append(["\uFFFD", ""])
+            self.state = self.attributeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-name-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        return True
+
+    def attributeNameState(self):
+        data = self.stream.char()
+        leavingThisState = True
+        emitToken = False
+        if data == "=":
+            self.state = self.beforeAttributeValueState
+        elif data in asciiLetters:
+            self.currentToken["data"][-1][0] += data +\
+                self.stream.charsUntil(asciiLetters, True)
+            leavingThisState = False
+        elif data == ">":
+            # XXX If we emit here the attributes are converted to a dict
+            # without being checked and when the code below runs we error
+            # because data is a dict not a list
+            emitToken = True
+        elif data in spaceCharacters:
+            self.state = self.afterAttributeNameState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][0] += "\uFFFD"
+            leavingThisState = False
+        elif data in ("'", '"', "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data":
+                                    "invalid-character-in-attribute-name"})
+            self.currentToken["data"][-1][0] += data
+            leavingThisState = False
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "eof-in-attribute-name"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][0] += data
+            leavingThisState = False
+
+        if leavingThisState:
+            # Attributes are not dropped at this stage. That happens when the
+            # start tag token is emitted so values can still be safely appended
+            # to attributes, but we do want to report the parse error in time.
+            self.currentToken["data"][-1][0] = (
+                self.currentToken["data"][-1][0].translate(asciiUpper2Lower))
+            for name, _ in self.currentToken["data"][:-1]:
+                if self.currentToken["data"][-1][0] == name:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                            "duplicate-attribute"})
+                    break
+            # XXX Fix for above XXX
+            if emitToken:
+                self.emitCurrentToken()
+        return True
+
+    def afterAttributeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data == "=":
+            self.state = self.beforeAttributeValueState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data in asciiLetters:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"].append(["\uFFFD", ""])
+            self.state = self.attributeNameState
+        elif data in ("'", '"', "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "invalid-character-after-attribute-name"})
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-end-of-tag-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        return True
+
+    def beforeAttributeValueState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data == "\"":
+            self.state = self.attributeValueDoubleQuotedState
+        elif data == "&":
+            self.state = self.attributeValueUnQuotedState
+            self.stream.unget(data)
+        elif data == "'":
+            self.state = self.attributeValueSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-value-but-got-right-bracket"})
+            self.emitCurrentToken()
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+            self.state = self.attributeValueUnQuotedState
+        elif data in ("=", "<", "`"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "equals-in-unquoted-attribute-value"})
+            self.currentToken["data"][-1][1] += data
+            self.state = self.attributeValueUnQuotedState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-value-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data
+            self.state = self.attributeValueUnQuotedState
+        return True
+
+    def attributeValueDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterAttributeValueState
+        elif data == "&":
+            self.processEntityInAttribute('"')
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-double-quote"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data +\
+                self.stream.charsUntil(("\"", "&", "\u0000"))
+        return True
+
+    def attributeValueSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterAttributeValueState
+        elif data == "&":
+            self.processEntityInAttribute("'")
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-single-quote"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data +\
+                self.stream.charsUntil(("'", "&", "\u0000"))
+        return True
+
+    def attributeValueUnQuotedState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == "&":
+            self.processEntityInAttribute(">")
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data in ('"', "'", "=", "<", "`"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-in-unquoted-attribute-value"})
+            self.currentToken["data"][-1][1] += data
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-no-quotes"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data + self.stream.charsUntil(
+                frozenset(("&", ">", '"', "'", "=", "<", "`", "\u0000")) | spaceCharacters)
+        return True
+
+    def afterAttributeValueState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-EOF-after-attribute-value"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-after-attribute-value"})
+            self.stream.unget(data)
+            self.state = self.beforeAttributeNameState
+        return True
+
+    def selfClosingStartTagState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.currentToken["selfClosing"] = True
+            self.emitCurrentToken()
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data":
+                                    "unexpected-EOF-after-solidus-in-tag"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-after-solidus-in-tag"})
+            self.stream.unget(data)
+            self.state = self.beforeAttributeNameState
+        return True
+
+    def bogusCommentState(self):
+        # Make a new comment token and give it as value all the characters
+        # until the first > or EOF (charsUntil checks for EOF automatically)
+        # and emit it.
+        data = self.stream.charsUntil(">")
+        data = data.replace("\u0000", "\uFFFD")
+        self.tokenQueue.append(
+            {"type": tokenTypes["Comment"], "data": data})
+
+        # Eat the character directly after the bogus comment which is either a
+        # ">" or an EOF.
+        self.stream.char()
+        self.state = self.dataState
+        return True
+
+    def markupDeclarationOpenState(self):
+        charStack = [self.stream.char()]
+        if charStack[-1] == "-":
+            charStack.append(self.stream.char())
+            if charStack[-1] == "-":
+                self.currentToken = {"type": tokenTypes["Comment"], "data": ""}
+                self.state = self.commentStartState
+                return True
+        elif charStack[-1] in ('d', 'D'):
+            matched = True
+            for expected in (('o', 'O'), ('c', 'C'), ('t', 'T'),
+                             ('y', 'Y'), ('p', 'P'), ('e', 'E')):
+                charStack.append(self.stream.char())
+                if charStack[-1] not in expected:
+                    matched = False
+                    break
+            if matched:
+                self.currentToken = {"type": tokenTypes["Doctype"],
+                                     "name": "",
+                                     "publicId": None, "systemId": None,
+                                     "correct": True}
+                self.state = self.doctypeState
+                return True
+        elif (charStack[-1] == "[" and
+              self.parser is not None and
+              self.parser.tree.openElements and
+              self.parser.tree.openElements[-1].namespace != self.parser.tree.defaultNamespace):
+            matched = True
+            for expected in ["C", "D", "A", "T", "A", "["]:
+                charStack.append(self.stream.char())
+                if charStack[-1] != expected:
+                    matched = False
+                    break
+            if matched:
+                self.state = self.cdataSectionState
+                return True
+
+        self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                "expected-dashes-or-doctype"})
+
+        while charStack:
+            self.stream.unget(charStack.pop())
+        self.state = self.bogusCommentState
+        return True
+
+    def commentStartState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentStartDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "incorrect-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += data
+            self.state = self.commentState
+        return True
+
+    def commentStartDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "-\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "incorrect-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "-" + data
+            self.state = self.commentState
+        return True
+
+    def commentState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += data + \
+                self.stream.charsUntil(("-", "\u0000"))
+        return True
+
+    def commentEndDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "-\uFFFD"
+            self.state = self.commentState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-end-dash"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "-" + data
+            self.state = self.commentState
+        return True
+
+    def commentEndState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "--\uFFFD"
+            self.state = self.commentState
+        elif data == "!":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-bang-after-double-dash-in-comment"})
+            self.state = self.commentEndBangState
+        elif data == "-":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-dash-after-double-dash-in-comment"})
+            self.currentToken["data"] += data
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-double-dash"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            # XXX
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-comment"})
+            self.currentToken["data"] += "--" + data
+            self.state = self.commentState
+        return True
+
+    def commentEndBangState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "-":
+            self.currentToken["data"] += "--!"
+            self.state = self.commentEndDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "--!\uFFFD"
+            self.state = self.commentState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-end-bang-state"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "--!" + data
+            self.state = self.commentState
+        return True
+
+    def doctypeState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-eof"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "need-space-after-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeNameState
+        return True
+
+    def beforeDoctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-right-bracket"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] = "\uFFFD"
+            self.state = self.doctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-eof"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["name"] = data
+            self.state = self.doctypeNameState
+        return True
+
+    def doctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.state = self.afterDoctypeNameState
+        elif data == ">":
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] += "\uFFFD"
+            self.state = self.doctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype-name"})
+            self.currentToken["correct"] = False
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["name"] += data
+        return True
+
+    def afterDoctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.currentToken["correct"] = False
+            self.stream.unget(data)
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            if data in ("p", "P"):
+                matched = True
+                for expected in (("u", "U"), ("b", "B"), ("l", "L"),
+                                 ("i", "I"), ("c", "C")):
+                    data = self.stream.char()
+                    if data not in expected:
+                        matched = False
+                        break
+                if matched:
+                    self.state = self.afterDoctypePublicKeywordState
+                    return True
+            elif data in ("s", "S"):
+                matched = True
+                for expected in (("y", "Y"), ("s", "S"), ("t", "T"),
+                                 ("e", "E"), ("m", "M")):
+                    data = self.stream.char()
+                    if data not in expected:
+                        matched = False
+                        break
+                if matched:
+                    self.state = self.afterDoctypeSystemKeywordState
+                    return True
+
+            # All the characters read before the current 'data' will be
+            # [a-zA-Z], so they're garbage in the bogus doctype and can be
+            # discarded; only the latest character might be '>' or EOF
+            # and needs to be ungetted
+            self.stream.unget(data)
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-space-or-right-bracket-in-doctype", "datavars":
+                                    {"data": data}})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+
+        return True
+
+    def afterDoctypePublicKeywordState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypePublicIdentifierState
+        elif data in ("'", '"'):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypePublicIdentifierState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.stream.unget(data)
+            self.state = self.beforeDoctypePublicIdentifierState
+        return True
+
+    def beforeDoctypePublicIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == "\"":
+            self.currentToken["publicId"] = ""
+            self.state = self.doctypePublicIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["publicId"] = ""
+            self.state = self.doctypePublicIdentifierSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def doctypePublicIdentifierDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterDoctypePublicIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["publicId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["publicId"] += data
+        return True
+
+    def doctypePublicIdentifierSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterDoctypePublicIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["publicId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["publicId"] += data
+        return True
+
+    def afterDoctypePublicIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.betweenDoctypePublicAndSystemIdentifiersState
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == '"':
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def betweenDoctypePublicAndSystemIdentifiersState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == '"':
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def afterDoctypeSystemKeywordState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypeSystemIdentifierState
+        elif data in ("'", '"'):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeSystemIdentifierState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeSystemIdentifierState
+        return True
+
+    def beforeDoctypeSystemIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == "\"":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def doctypeSystemIdentifierDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterDoctypeSystemIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["systemId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["systemId"] += data
+        return True
+
+    def doctypeSystemIdentifierSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterDoctypeSystemIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["systemId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["systemId"] += data
+        return True
+
+    def afterDoctypeSystemIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.state = self.bogusDoctypeState
+        return True
+
+    def bogusDoctypeState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            # XXX EMIT
+            self.stream.unget(data)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            pass
+        return True
+
+    def cdataSectionState(self):
+        data = []
+        while True:
+            data.append(self.stream.charsUntil("]"))
+            data.append(self.stream.charsUntil(">"))
+            char = self.stream.char()
+            if char == EOF:
+                break
+            else:
+                assert char == ">"
+                if data[-1][-2:] == "]]":
+                    data[-1] = data[-1][:-2]
+                    break
+                else:
+                    data.append(char)
+
+        data = "".join(data)  # pylint:disable=redefined-variable-type
+        # Deal with null here rather than in the parser
+        nullCount = data.count("\u0000")
+        if nullCount > 0:
+            for _ in range(nullCount):
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data": "invalid-codepoint"})
+            data = data.replace("\u0000", "\uFFFD")
+        if data:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": data})
+        self.state = self.dataState
+        return True
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__init__.py
new file mode 100644
index 00000000..a5ba4bf1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__init__.py
@@ -0,0 +1,14 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from .py import Trie as PyTrie
+
+Trie = PyTrie
+
+# pylint:disable=wrong-import-position
+try:
+    from .datrie import Trie as DATrie
+except ImportError:
+    pass
+else:
+    Trie = DATrie
+# pylint:enable=wrong-import-position
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..bb097565
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/_base.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/_base.cpython-37.pyc
new file mode 100644
index 00000000..2b98eddb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/_base.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/datrie.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/datrie.cpython-37.pyc
new file mode 100644
index 00000000..f55827e6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/datrie.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-37.pyc
new file mode 100644
index 00000000..f0d0aa03
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/_base.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/_base.py
new file mode 100644
index 00000000..6b71975f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/_base.py
@@ -0,0 +1,40 @@
+from __future__ import absolute_import, division, unicode_literals
+
+try:
+    from collections.abc import Mapping
+except ImportError:  # Python 2.7
+    from collections import Mapping
+
+
+class Trie(Mapping):
+    """Abstract base class for tries"""
+
+    def keys(self, prefix=None):
+        # pylint:disable=arguments-differ
+        keys = super(Trie, self).keys()
+
+        if prefix is None:
+            return set(keys)
+
+        return {x for x in keys if x.startswith(prefix)}
+
+    def has_keys_with_prefix(self, prefix):
+        for key in self.keys():
+            if key.startswith(prefix):
+                return True
+
+        return False
+
+    def longest_prefix(self, prefix):
+        if prefix in self:
+            return prefix
+
+        for i in range(1, len(prefix) + 1):
+            if prefix[:-i] in self:
+                return prefix[:-i]
+
+        raise KeyError(prefix)
+
+    def longest_prefix_item(self, prefix):
+        lprefix = self.longest_prefix(prefix)
+        return (lprefix, self[lprefix])
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/datrie.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/datrie.py
new file mode 100644
index 00000000..e2e5f866
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/datrie.py
@@ -0,0 +1,44 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from datrie import Trie as DATrie
+from pip._vendor.six import text_type
+
+from ._base import Trie as ABCTrie
+
+
+class Trie(ABCTrie):
+    def __init__(self, data):
+        chars = set()
+        for key in data.keys():
+            if not isinstance(key, text_type):
+                raise TypeError("All keys must be strings")
+            for char in key:
+                chars.add(char)
+
+        self._data = DATrie("".join(chars))
+        for key, value in data.items():
+            self._data[key] = value
+
+    def __contains__(self, key):
+        return key in self._data
+
+    def __len__(self):
+        return len(self._data)
+
+    def __iter__(self):
+        raise NotImplementedError()
+
+    def __getitem__(self, key):
+        return self._data[key]
+
+    def keys(self, prefix=None):
+        return self._data.keys(prefix)
+
+    def has_keys_with_prefix(self, prefix):
+        return self._data.has_keys_with_prefix(prefix)
+
+    def longest_prefix(self, prefix):
+        return self._data.longest_prefix(prefix)
+
+    def longest_prefix_item(self, prefix):
+        return self._data.longest_prefix_item(prefix)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/py.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/py.py
new file mode 100644
index 00000000..c178b219
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_trie/py.py
@@ -0,0 +1,67 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from bisect import bisect_left
+
+from ._base import Trie as ABCTrie
+
+
+class Trie(ABCTrie):
+    def __init__(self, data):
+        if not all(isinstance(x, text_type) for x in data.keys()):
+            raise TypeError("All keys must be strings")
+
+        self._data = data
+        self._keys = sorted(data.keys())
+        self._cachestr = ""
+        self._cachepoints = (0, len(data))
+
+    def __contains__(self, key):
+        return key in self._data
+
+    def __len__(self):
+        return len(self._data)
+
+    def __iter__(self):
+        return iter(self._data)
+
+    def __getitem__(self, key):
+        return self._data[key]
+
+    def keys(self, prefix=None):
+        if prefix is None or prefix == "" or not self._keys:
+            return set(self._keys)
+
+        if prefix.startswith(self._cachestr):
+            lo, hi = self._cachepoints
+            start = i = bisect_left(self._keys, prefix, lo, hi)
+        else:
+            start = i = bisect_left(self._keys, prefix)
+
+        keys = set()
+        if start == len(self._keys):
+            return keys
+
+        while self._keys[i].startswith(prefix):
+            keys.add(self._keys[i])
+            i += 1
+
+        self._cachestr = prefix
+        self._cachepoints = (start, i)
+
+        return keys
+
+    def has_keys_with_prefix(self, prefix):
+        if prefix in self._data:
+            return True
+
+        if prefix.startswith(self._cachestr):
+            lo, hi = self._cachepoints
+            i = bisect_left(self._keys, prefix, lo, hi)
+        else:
+            i = bisect_left(self._keys, prefix)
+
+        if i == len(self._keys):
+            return False
+
+        return self._keys[i].startswith(prefix)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_utils.py
new file mode 100644
index 00000000..0703afb3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/_utils.py
@@ -0,0 +1,124 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from types import ModuleType
+
+from pip._vendor.six import text_type
+
+try:
+    import xml.etree.cElementTree as default_etree
+except ImportError:
+    import xml.etree.ElementTree as default_etree
+
+
+__all__ = ["default_etree", "MethodDispatcher", "isSurrogatePair",
+           "surrogatePairToCodepoint", "moduleFactoryFactory",
+           "supports_lone_surrogates"]
+
+
+# Platforms not supporting lone surrogates (\uD800-\uDFFF) should be
+# caught by the below test. In general this would be any platform
+# using UTF-16 as its encoding of unicode strings, such as
+# Jython. This is because UTF-16 itself is based on the use of such
+# surrogates, and there is no mechanism to further escape such
+# escapes.
+try:
+    _x = eval('"\\uD800"')  # pylint:disable=eval-used
+    if not isinstance(_x, text_type):
+        # We need this with u"" because of http://bugs.jython.org/issue2039
+        _x = eval('u"\\uD800"')  # pylint:disable=eval-used
+        assert isinstance(_x, text_type)
+except:  # pylint:disable=bare-except
+    supports_lone_surrogates = False
+else:
+    supports_lone_surrogates = True
+
+
+class MethodDispatcher(dict):
+    """Dict with 2 special properties:
+
+    On initiation, keys that are lists, sets or tuples are converted to
+    multiple keys so accessing any one of the items in the original
+    list-like object returns the matching value
+
+    md = MethodDispatcher({("foo", "bar"):"baz"})
+    md["foo"] == "baz"
+
+    A default value which can be set through the default attribute.
+    """
+
+    def __init__(self, items=()):
+        # Using _dictEntries instead of directly assigning to self is about
+        # twice as fast. Please do careful performance testing before changing
+        # anything here.
+        _dictEntries = []
+        for name, value in items:
+            if isinstance(name, (list, tuple, frozenset, set)):
+                for item in name:
+                    _dictEntries.append((item, value))
+            else:
+                _dictEntries.append((name, value))
+        dict.__init__(self, _dictEntries)
+        assert len(self) == len(_dictEntries)
+        self.default = None
+
+    def __getitem__(self, key):
+        return dict.get(self, key, self.default)
+
+
+# Some utility functions to deal with weirdness around UCS2 vs UCS4
+# python builds
+
+def isSurrogatePair(data):
+    return (len(data) == 2 and
+            ord(data[0]) >= 0xD800 and ord(data[0]) <= 0xDBFF and
+            ord(data[1]) >= 0xDC00 and ord(data[1]) <= 0xDFFF)
+
+
+def surrogatePairToCodepoint(data):
+    char_val = (0x10000 + (ord(data[0]) - 0xD800) * 0x400 +
+                (ord(data[1]) - 0xDC00))
+    return char_val
+
+# Module Factory Factory (no, this isn't Java, I know)
+# Here to stop this being duplicated all over the place.
+
+
+def moduleFactoryFactory(factory):
+    moduleCache = {}
+
+    def moduleFactory(baseModule, *args, **kwargs):
+        if isinstance(ModuleType.__name__, type("")):
+            name = "_%s_factory" % baseModule.__name__
+        else:
+            name = b"_%s_factory" % baseModule.__name__
+
+        kwargs_tuple = tuple(kwargs.items())
+
+        try:
+            return moduleCache[name][args][kwargs_tuple]
+        except KeyError:
+            mod = ModuleType(name)
+            objs = factory(baseModule, *args, **kwargs)
+            mod.__dict__.update(objs)
+            if "name" not in moduleCache:
+                moduleCache[name] = {}
+            if "args" not in moduleCache[name]:
+                moduleCache[name][args] = {}
+            if "kwargs" not in moduleCache[name][args]:
+                moduleCache[name][args][kwargs_tuple] = {}
+            moduleCache[name][args][kwargs_tuple] = mod
+            return mod
+
+    return moduleFactory
+
+
+def memoize(func):
+    cache = {}
+
+    def wrapped(*args, **kwargs):
+        key = (tuple(args), tuple(kwargs.items()))
+        if key not in cache:
+            cache[key] = func(*args, **kwargs)
+        return cache[key]
+
+    return wrapped
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/constants.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/constants.py
new file mode 100644
index 00000000..1ff80419
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/constants.py
@@ -0,0 +1,2947 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import string
+
+EOF = None
+
+E = {
+    "null-character":
+        "Null character in input stream, replaced with U+FFFD.",
+    "invalid-codepoint":
+        "Invalid codepoint in stream.",
+    "incorrectly-placed-solidus":
+        "Solidus (/) incorrectly placed in tag.",
+    "incorrect-cr-newline-entity":
+        "Incorrect CR newline entity, replaced with LF.",
+    "illegal-windows-1252-entity":
+        "Entity used with illegal number (windows-1252 reference).",
+    "cant-convert-numeric-entity":
+        "Numeric entity couldn't be converted to character "
+        "(codepoint U+%(charAsInt)08x).",
+    "illegal-codepoint-for-numeric-entity":
+        "Numeric entity represents an illegal codepoint: "
+        "U+%(charAsInt)08x.",
+    "numeric-entity-without-semicolon":
+        "Numeric entity didn't end with ';'.",
+    "expected-numeric-entity-but-got-eof":
+        "Numeric entity expected. Got end of file instead.",
+    "expected-numeric-entity":
+        "Numeric entity expected but none found.",
+    "named-entity-without-semicolon":
+        "Named entity didn't end with ';'.",
+    "expected-named-entity":
+        "Named entity expected. Got none.",
+    "attributes-in-end-tag":
+        "End tag contains unexpected attributes.",
+    'self-closing-flag-on-end-tag':
+        "End tag contains unexpected self-closing flag.",
+    "expected-tag-name-but-got-right-bracket":
+        "Expected tag name. Got '>' instead.",
+    "expected-tag-name-but-got-question-mark":
+        "Expected tag name. Got '?' instead. (HTML doesn't "
+        "support processing instructions.)",
+    "expected-tag-name":
+        "Expected tag name. Got something else instead",
+    "expected-closing-tag-but-got-right-bracket":
+        "Expected closing tag. Got '>' instead. Ignoring '</>'.",
+    "expected-closing-tag-but-got-eof":
+        "Expected closing tag. Unexpected end of file.",
+    "expected-closing-tag-but-got-char":
+        "Expected closing tag. Unexpected character '%(data)s' found.",
+    "eof-in-tag-name":
+        "Unexpected end of file in the tag name.",
+    "expected-attribute-name-but-got-eof":
+        "Unexpected end of file. Expected attribute name instead.",
+    "eof-in-attribute-name":
+        "Unexpected end of file in attribute name.",
+    "invalid-character-in-attribute-name":
+        "Invalid character in attribute name",
+    "duplicate-attribute":
+        "Dropped duplicate attribute on tag.",
+    "expected-end-of-tag-name-but-got-eof":
+        "Unexpected end of file. Expected = or end of tag.",
+    "expected-attribute-value-but-got-eof":
+        "Unexpected end of file. Expected attribute value.",
+    "expected-attribute-value-but-got-right-bracket":
+        "Expected attribute value. Got '>' instead.",
+    'equals-in-unquoted-attribute-value':
+        "Unexpected = in unquoted attribute",
+    'unexpected-character-in-unquoted-attribute-value':
+        "Unexpected character in unquoted attribute",
+    "invalid-character-after-attribute-name":
+        "Unexpected character after attribute name.",
+    "unexpected-character-after-attribute-value":
+        "Unexpected character after attribute value.",
+    "eof-in-attribute-value-double-quote":
+        "Unexpected end of file in attribute value (\").",
+    "eof-in-attribute-value-single-quote":
+        "Unexpected end of file in attribute value (').",
+    "eof-in-attribute-value-no-quotes":
+        "Unexpected end of file in attribute value.",
+    "unexpected-EOF-after-solidus-in-tag":
+        "Unexpected end of file in tag. Expected >",
+    "unexpected-character-after-solidus-in-tag":
+        "Unexpected character after / in tag. Expected >",
+    "expected-dashes-or-doctype":
+        "Expected '--' or 'DOCTYPE'. Not found.",
+    "unexpected-bang-after-double-dash-in-comment":
+        "Unexpected ! after -- in comment",
+    "unexpected-space-after-double-dash-in-comment":
+        "Unexpected space after -- in comment",
+    "incorrect-comment":
+        "Incorrect comment.",
+    "eof-in-comment":
+        "Unexpected end of file in comment.",
+    "eof-in-comment-end-dash":
+        "Unexpected end of file in comment (-)",
+    "unexpected-dash-after-double-dash-in-comment":
+        "Unexpected '-' after '--' found in comment.",
+    "eof-in-comment-double-dash":
+        "Unexpected end of file in comment (--).",
+    "eof-in-comment-end-space-state":
+        "Unexpected end of file in comment.",
+    "eof-in-comment-end-bang-state":
+        "Unexpected end of file in comment.",
+    "unexpected-char-in-comment":
+        "Unexpected character in comment found.",
+    "need-space-after-doctype":
+        "No space after literal string 'DOCTYPE'.",
+    "expected-doctype-name-but-got-right-bracket":
+        "Unexpected > character. Expected DOCTYPE name.",
+    "expected-doctype-name-but-got-eof":
+        "Unexpected end of file. Expected DOCTYPE name.",
+    "eof-in-doctype-name":
+        "Unexpected end of file in DOCTYPE name.",
+    "eof-in-doctype":
+        "Unexpected end of file in DOCTYPE.",
+    "expected-space-or-right-bracket-in-doctype":
+        "Expected space or '>'. Got '%(data)s'",
+    "unexpected-end-of-doctype":
+        "Unexpected end of DOCTYPE.",
+    "unexpected-char-in-doctype":
+        "Unexpected character in DOCTYPE.",
+    "eof-in-innerhtml":
+        "XXX innerHTML EOF",
+    "unexpected-doctype":
+        "Unexpected DOCTYPE. Ignored.",
+    "non-html-root":
+        "html needs to be the first start tag.",
+    "expected-doctype-but-got-eof":
+        "Unexpected End of file. Expected DOCTYPE.",
+    "unknown-doctype":
+        "Erroneous DOCTYPE.",
+    "expected-doctype-but-got-chars":
+        "Unexpected non-space characters. Expected DOCTYPE.",
+    "expected-doctype-but-got-start-tag":
+        "Unexpected start tag (%(name)s). Expected DOCTYPE.",
+    "expected-doctype-but-got-end-tag":
+        "Unexpected end tag (%(name)s). Expected DOCTYPE.",
+    "end-tag-after-implied-root":
+        "Unexpected end tag (%(name)s) after the (implied) root element.",
+    "expected-named-closing-tag-but-got-eof":
+        "Unexpected end of file. Expected end tag (%(name)s).",
+    "two-heads-are-not-better-than-one":
+        "Unexpected start tag head in existing head. Ignored.",
+    "unexpected-end-tag":
+        "Unexpected end tag (%(name)s). Ignored.",
+    "unexpected-start-tag-out-of-my-head":
+        "Unexpected start tag (%(name)s) that can be in head. Moved.",
+    "unexpected-start-tag":
+        "Unexpected start tag (%(name)s).",
+    "missing-end-tag":
+        "Missing end tag (%(name)s).",
+    "missing-end-tags":
+        "Missing end tags (%(name)s).",
+    "unexpected-start-tag-implies-end-tag":
+        "Unexpected start tag (%(startName)s) "
+        "implies end tag (%(endName)s).",
+    "unexpected-start-tag-treated-as":
+        "Unexpected start tag (%(originalName)s). Treated as %(newName)s.",
+    "deprecated-tag":
+        "Unexpected start tag %(name)s. Don't use it!",
+    "unexpected-start-tag-ignored":
+        "Unexpected start tag %(name)s. Ignored.",
+    "expected-one-end-tag-but-got-another":
+        "Unexpected end tag (%(gotName)s). "
+        "Missing end tag (%(expectedName)s).",
+    "end-tag-too-early":
+        "End tag (%(name)s) seen too early. Expected other end tag.",
+    "end-tag-too-early-named":
+        "Unexpected end tag (%(gotName)s). Expected end tag (%(expectedName)s).",
+    "end-tag-too-early-ignored":
+        "End tag (%(name)s) seen too early. Ignored.",
+    "adoption-agency-1.1":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 1 of the adoption agency algorithm.",
+    "adoption-agency-1.2":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 2 of the adoption agency algorithm.",
+    "adoption-agency-1.3":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 3 of the adoption agency algorithm.",
+    "adoption-agency-4.4":
+        "End tag (%(name)s) violates step 4, "
+        "paragraph 4 of the adoption agency algorithm.",
+    "unexpected-end-tag-treated-as":
+        "Unexpected end tag (%(originalName)s). Treated as %(newName)s.",
+    "no-end-tag":
+        "This element (%(name)s) has no end tag.",
+    "unexpected-implied-end-tag-in-table":
+        "Unexpected implied end tag (%(name)s) in the table phase.",
+    "unexpected-implied-end-tag-in-table-body":
+        "Unexpected implied end tag (%(name)s) in the table body phase.",
+    "unexpected-char-implies-table-voodoo":
+        "Unexpected non-space characters in "
+        "table context caused voodoo mode.",
+    "unexpected-hidden-input-in-table":
+        "Unexpected input with type hidden in table context.",
+    "unexpected-form-in-table":
+        "Unexpected form in table context.",
+    "unexpected-start-tag-implies-table-voodoo":
+        "Unexpected start tag (%(name)s) in "
+        "table context caused voodoo mode.",
+    "unexpected-end-tag-implies-table-voodoo":
+        "Unexpected end tag (%(name)s) in "
+        "table context caused voodoo mode.",
+    "unexpected-cell-in-table-body":
+        "Unexpected table cell start tag (%(name)s) "
+        "in the table body phase.",
+    "unexpected-cell-end-tag":
+        "Got table cell end tag (%(name)s) "
+        "while required end tags are missing.",
+    "unexpected-end-tag-in-table-body":
+        "Unexpected end tag (%(name)s) in the table body phase. Ignored.",
+    "unexpected-implied-end-tag-in-table-row":
+        "Unexpected implied end tag (%(name)s) in the table row phase.",
+    "unexpected-end-tag-in-table-row":
+        "Unexpected end tag (%(name)s) in the table row phase. Ignored.",
+    "unexpected-select-in-select":
+        "Unexpected select start tag in the select phase "
+        "treated as select end tag.",
+    "unexpected-input-in-select":
+        "Unexpected input start tag in the select phase.",
+    "unexpected-start-tag-in-select":
+        "Unexpected start tag token (%(name)s in the select phase. "
+        "Ignored.",
+    "unexpected-end-tag-in-select":
+        "Unexpected end tag (%(name)s) in the select phase. Ignored.",
+    "unexpected-table-element-start-tag-in-select-in-table":
+        "Unexpected table element start tag (%(name)s) in the select in table phase.",
+    "unexpected-table-element-end-tag-in-select-in-table":
+        "Unexpected table element end tag (%(name)s) in the select in table phase.",
+    "unexpected-char-after-body":
+        "Unexpected non-space characters in the after body phase.",
+    "unexpected-start-tag-after-body":
+        "Unexpected start tag token (%(name)s)"
+        " in the after body phase.",
+    "unexpected-end-tag-after-body":
+        "Unexpected end tag token (%(name)s)"
+        " in the after body phase.",
+    "unexpected-char-in-frameset":
+        "Unexpected characters in the frameset phase. Characters ignored.",
+    "unexpected-start-tag-in-frameset":
+        "Unexpected start tag token (%(name)s)"
+        " in the frameset phase. Ignored.",
+    "unexpected-frameset-in-frameset-innerhtml":
+        "Unexpected end tag token (frameset) "
+        "in the frameset phase (innerHTML).",
+    "unexpected-end-tag-in-frameset":
+        "Unexpected end tag token (%(name)s)"
+        " in the frameset phase. Ignored.",
+    "unexpected-char-after-frameset":
+        "Unexpected non-space characters in the "
+        "after frameset phase. Ignored.",
+    "unexpected-start-tag-after-frameset":
+        "Unexpected start tag (%(name)s)"
+        " in the after frameset phase. Ignored.",
+    "unexpected-end-tag-after-frameset":
+        "Unexpected end tag (%(name)s)"
+        " in the after frameset phase. Ignored.",
+    "unexpected-end-tag-after-body-innerhtml":
+        "Unexpected end tag after body(innerHtml)",
+    "expected-eof-but-got-char":
+        "Unexpected non-space characters. Expected end of file.",
+    "expected-eof-but-got-start-tag":
+        "Unexpected start tag (%(name)s)"
+        ". Expected end of file.",
+    "expected-eof-but-got-end-tag":
+        "Unexpected end tag (%(name)s)"
+        ". Expected end of file.",
+    "eof-in-table":
+        "Unexpected end of file. Expected table content.",
+    "eof-in-select":
+        "Unexpected end of file. Expected select content.",
+    "eof-in-frameset":
+        "Unexpected end of file. Expected frameset content.",
+    "eof-in-script-in-script":
+        "Unexpected end of file. Expected script content.",
+    "eof-in-foreign-lands":
+        "Unexpected end of file. Expected foreign content",
+    "non-void-element-with-trailing-solidus":
+        "Trailing solidus not allowed on element %(name)s",
+    "unexpected-html-element-in-foreign-content":
+        "Element %(name)s not allowed in a non-html context",
+    "unexpected-end-tag-before-html":
+        "Unexpected end tag (%(name)s) before html.",
+    "unexpected-inhead-noscript-tag":
+        "Element %(name)s not allowed in a inhead-noscript context",
+    "eof-in-head-noscript":
+        "Unexpected end of file. Expected inhead-noscript content",
+    "char-in-head-noscript":
+        "Unexpected non-space character. Expected inhead-noscript content",
+    "XXX-undefined-error":
+        "Undefined error (this sucks and should be fixed)",
+}
+
+namespaces = {
+    "html": "http://www.w3.org/1999/xhtml",
+    "mathml": "http://www.w3.org/1998/Math/MathML",
+    "svg": "http://www.w3.org/2000/svg",
+    "xlink": "http://www.w3.org/1999/xlink",
+    "xml": "http://www.w3.org/XML/1998/namespace",
+    "xmlns": "http://www.w3.org/2000/xmlns/"
+}
+
+scopingElements = frozenset([
+    (namespaces["html"], "applet"),
+    (namespaces["html"], "caption"),
+    (namespaces["html"], "html"),
+    (namespaces["html"], "marquee"),
+    (namespaces["html"], "object"),
+    (namespaces["html"], "table"),
+    (namespaces["html"], "td"),
+    (namespaces["html"], "th"),
+    (namespaces["mathml"], "mi"),
+    (namespaces["mathml"], "mo"),
+    (namespaces["mathml"], "mn"),
+    (namespaces["mathml"], "ms"),
+    (namespaces["mathml"], "mtext"),
+    (namespaces["mathml"], "annotation-xml"),
+    (namespaces["svg"], "foreignObject"),
+    (namespaces["svg"], "desc"),
+    (namespaces["svg"], "title"),
+])
+
+formattingElements = frozenset([
+    (namespaces["html"], "a"),
+    (namespaces["html"], "b"),
+    (namespaces["html"], "big"),
+    (namespaces["html"], "code"),
+    (namespaces["html"], "em"),
+    (namespaces["html"], "font"),
+    (namespaces["html"], "i"),
+    (namespaces["html"], "nobr"),
+    (namespaces["html"], "s"),
+    (namespaces["html"], "small"),
+    (namespaces["html"], "strike"),
+    (namespaces["html"], "strong"),
+    (namespaces["html"], "tt"),
+    (namespaces["html"], "u")
+])
+
+specialElements = frozenset([
+    (namespaces["html"], "address"),
+    (namespaces["html"], "applet"),
+    (namespaces["html"], "area"),
+    (namespaces["html"], "article"),
+    (namespaces["html"], "aside"),
+    (namespaces["html"], "base"),
+    (namespaces["html"], "basefont"),
+    (namespaces["html"], "bgsound"),
+    (namespaces["html"], "blockquote"),
+    (namespaces["html"], "body"),
+    (namespaces["html"], "br"),
+    (namespaces["html"], "button"),
+    (namespaces["html"], "caption"),
+    (namespaces["html"], "center"),
+    (namespaces["html"], "col"),
+    (namespaces["html"], "colgroup"),
+    (namespaces["html"], "command"),
+    (namespaces["html"], "dd"),
+    (namespaces["html"], "details"),
+    (namespaces["html"], "dir"),
+    (namespaces["html"], "div"),
+    (namespaces["html"], "dl"),
+    (namespaces["html"], "dt"),
+    (namespaces["html"], "embed"),
+    (namespaces["html"], "fieldset"),
+    (namespaces["html"], "figure"),
+    (namespaces["html"], "footer"),
+    (namespaces["html"], "form"),
+    (namespaces["html"], "frame"),
+    (namespaces["html"], "frameset"),
+    (namespaces["html"], "h1"),
+    (namespaces["html"], "h2"),
+    (namespaces["html"], "h3"),
+    (namespaces["html"], "h4"),
+    (namespaces["html"], "h5"),
+    (namespaces["html"], "h6"),
+    (namespaces["html"], "head"),
+    (namespaces["html"], "header"),
+    (namespaces["html"], "hr"),
+    (namespaces["html"], "html"),
+    (namespaces["html"], "iframe"),
+    # Note that image is commented out in the spec as "this isn't an
+    # element that can end up on the stack, so it doesn't matter,"
+    (namespaces["html"], "image"),
+    (namespaces["html"], "img"),
+    (namespaces["html"], "input"),
+    (namespaces["html"], "isindex"),
+    (namespaces["html"], "li"),
+    (namespaces["html"], "link"),
+    (namespaces["html"], "listing"),
+    (namespaces["html"], "marquee"),
+    (namespaces["html"], "menu"),
+    (namespaces["html"], "meta"),
+    (namespaces["html"], "nav"),
+    (namespaces["html"], "noembed"),
+    (namespaces["html"], "noframes"),
+    (namespaces["html"], "noscript"),
+    (namespaces["html"], "object"),
+    (namespaces["html"], "ol"),
+    (namespaces["html"], "p"),
+    (namespaces["html"], "param"),
+    (namespaces["html"], "plaintext"),
+    (namespaces["html"], "pre"),
+    (namespaces["html"], "script"),
+    (namespaces["html"], "section"),
+    (namespaces["html"], "select"),
+    (namespaces["html"], "style"),
+    (namespaces["html"], "table"),
+    (namespaces["html"], "tbody"),
+    (namespaces["html"], "td"),
+    (namespaces["html"], "textarea"),
+    (namespaces["html"], "tfoot"),
+    (namespaces["html"], "th"),
+    (namespaces["html"], "thead"),
+    (namespaces["html"], "title"),
+    (namespaces["html"], "tr"),
+    (namespaces["html"], "ul"),
+    (namespaces["html"], "wbr"),
+    (namespaces["html"], "xmp"),
+    (namespaces["svg"], "foreignObject")
+])
+
+htmlIntegrationPointElements = frozenset([
+    (namespaces["mathml"], "annotation-xml"),
+    (namespaces["svg"], "foreignObject"),
+    (namespaces["svg"], "desc"),
+    (namespaces["svg"], "title")
+])
+
+mathmlTextIntegrationPointElements = frozenset([
+    (namespaces["mathml"], "mi"),
+    (namespaces["mathml"], "mo"),
+    (namespaces["mathml"], "mn"),
+    (namespaces["mathml"], "ms"),
+    (namespaces["mathml"], "mtext")
+])
+
+adjustSVGAttributes = {
+    "attributename": "attributeName",
+    "attributetype": "attributeType",
+    "basefrequency": "baseFrequency",
+    "baseprofile": "baseProfile",
+    "calcmode": "calcMode",
+    "clippathunits": "clipPathUnits",
+    "contentscripttype": "contentScriptType",
+    "contentstyletype": "contentStyleType",
+    "diffuseconstant": "diffuseConstant",
+    "edgemode": "edgeMode",
+    "externalresourcesrequired": "externalResourcesRequired",
+    "filterres": "filterRes",
+    "filterunits": "filterUnits",
+    "glyphref": "glyphRef",
+    "gradienttransform": "gradientTransform",
+    "gradientunits": "gradientUnits",
+    "kernelmatrix": "kernelMatrix",
+    "kernelunitlength": "kernelUnitLength",
+    "keypoints": "keyPoints",
+    "keysplines": "keySplines",
+    "keytimes": "keyTimes",
+    "lengthadjust": "lengthAdjust",
+    "limitingconeangle": "limitingConeAngle",
+    "markerheight": "markerHeight",
+    "markerunits": "markerUnits",
+    "markerwidth": "markerWidth",
+    "maskcontentunits": "maskContentUnits",
+    "maskunits": "maskUnits",
+    "numoctaves": "numOctaves",
+    "pathlength": "pathLength",
+    "patterncontentunits": "patternContentUnits",
+    "patterntransform": "patternTransform",
+    "patternunits": "patternUnits",
+    "pointsatx": "pointsAtX",
+    "pointsaty": "pointsAtY",
+    "pointsatz": "pointsAtZ",
+    "preservealpha": "preserveAlpha",
+    "preserveaspectratio": "preserveAspectRatio",
+    "primitiveunits": "primitiveUnits",
+    "refx": "refX",
+    "refy": "refY",
+    "repeatcount": "repeatCount",
+    "repeatdur": "repeatDur",
+    "requiredextensions": "requiredExtensions",
+    "requiredfeatures": "requiredFeatures",
+    "specularconstant": "specularConstant",
+    "specularexponent": "specularExponent",
+    "spreadmethod": "spreadMethod",
+    "startoffset": "startOffset",
+    "stddeviation": "stdDeviation",
+    "stitchtiles": "stitchTiles",
+    "surfacescale": "surfaceScale",
+    "systemlanguage": "systemLanguage",
+    "tablevalues": "tableValues",
+    "targetx": "targetX",
+    "targety": "targetY",
+    "textlength": "textLength",
+    "viewbox": "viewBox",
+    "viewtarget": "viewTarget",
+    "xchannelselector": "xChannelSelector",
+    "ychannelselector": "yChannelSelector",
+    "zoomandpan": "zoomAndPan"
+}
+
+adjustMathMLAttributes = {"definitionurl": "definitionURL"}
+
+adjustForeignAttributes = {
+    "xlink:actuate": ("xlink", "actuate", namespaces["xlink"]),
+    "xlink:arcrole": ("xlink", "arcrole", namespaces["xlink"]),
+    "xlink:href": ("xlink", "href", namespaces["xlink"]),
+    "xlink:role": ("xlink", "role", namespaces["xlink"]),
+    "xlink:show": ("xlink", "show", namespaces["xlink"]),
+    "xlink:title": ("xlink", "title", namespaces["xlink"]),
+    "xlink:type": ("xlink", "type", namespaces["xlink"]),
+    "xml:base": ("xml", "base", namespaces["xml"]),
+    "xml:lang": ("xml", "lang", namespaces["xml"]),
+    "xml:space": ("xml", "space", namespaces["xml"]),
+    "xmlns": (None, "xmlns", namespaces["xmlns"]),
+    "xmlns:xlink": ("xmlns", "xlink", namespaces["xmlns"])
+}
+
+unadjustForeignAttributes = dict([((ns, local), qname) for qname, (prefix, local, ns) in
+                                  adjustForeignAttributes.items()])
+
+spaceCharacters = frozenset([
+    "\t",
+    "\n",
+    "\u000C",
+    " ",
+    "\r"
+])
+
+tableInsertModeElements = frozenset([
+    "table",
+    "tbody",
+    "tfoot",
+    "thead",
+    "tr"
+])
+
+asciiLowercase = frozenset(string.ascii_lowercase)
+asciiUppercase = frozenset(string.ascii_uppercase)
+asciiLetters = frozenset(string.ascii_letters)
+digits = frozenset(string.digits)
+hexDigits = frozenset(string.hexdigits)
+
+asciiUpper2Lower = dict([(ord(c), ord(c.lower()))
+                         for c in string.ascii_uppercase])
+
+# Heading elements need to be ordered
+headingElements = (
+    "h1",
+    "h2",
+    "h3",
+    "h4",
+    "h5",
+    "h6"
+)
+
+voidElements = frozenset([
+    "base",
+    "command",
+    "event-source",
+    "link",
+    "meta",
+    "hr",
+    "br",
+    "img",
+    "embed",
+    "param",
+    "area",
+    "col",
+    "input",
+    "source",
+    "track"
+])
+
+cdataElements = frozenset(['title', 'textarea'])
+
+rcdataElements = frozenset([
+    'style',
+    'script',
+    'xmp',
+    'iframe',
+    'noembed',
+    'noframes',
+    'noscript'
+])
+
+booleanAttributes = {
+    "": frozenset(["irrelevant", "itemscope"]),
+    "style": frozenset(["scoped"]),
+    "img": frozenset(["ismap"]),
+    "audio": frozenset(["autoplay", "controls"]),
+    "video": frozenset(["autoplay", "controls"]),
+    "script": frozenset(["defer", "async"]),
+    "details": frozenset(["open"]),
+    "datagrid": frozenset(["multiple", "disabled"]),
+    "command": frozenset(["hidden", "disabled", "checked", "default"]),
+    "hr": frozenset(["noshade"]),
+    "menu": frozenset(["autosubmit"]),
+    "fieldset": frozenset(["disabled", "readonly"]),
+    "option": frozenset(["disabled", "readonly", "selected"]),
+    "optgroup": frozenset(["disabled", "readonly"]),
+    "button": frozenset(["disabled", "autofocus"]),
+    "input": frozenset(["disabled", "readonly", "required", "autofocus", "checked", "ismap"]),
+    "select": frozenset(["disabled", "readonly", "autofocus", "multiple"]),
+    "output": frozenset(["disabled", "readonly"]),
+    "iframe": frozenset(["seamless"]),
+}
+
+# entitiesWindows1252 has to be _ordered_ and needs to have an index. It
+# therefore can't be a frozenset.
+entitiesWindows1252 = (
+    8364,   # 0x80  0x20AC  EURO SIGN
+    65533,  # 0x81          UNDEFINED
+    8218,   # 0x82  0x201A  SINGLE LOW-9 QUOTATION MARK
+    402,    # 0x83  0x0192  LATIN SMALL LETTER F WITH HOOK
+    8222,   # 0x84  0x201E  DOUBLE LOW-9 QUOTATION MARK
+    8230,   # 0x85  0x2026  HORIZONTAL ELLIPSIS
+    8224,   # 0x86  0x2020  DAGGER
+    8225,   # 0x87  0x2021  DOUBLE DAGGER
+    710,    # 0x88  0x02C6  MODIFIER LETTER CIRCUMFLEX ACCENT
+    8240,   # 0x89  0x2030  PER MILLE SIGN
+    352,    # 0x8A  0x0160  LATIN CAPITAL LETTER S WITH CARON
+    8249,   # 0x8B  0x2039  SINGLE LEFT-POINTING ANGLE QUOTATION MARK
+    338,    # 0x8C  0x0152  LATIN CAPITAL LIGATURE OE
+    65533,  # 0x8D          UNDEFINED
+    381,    # 0x8E  0x017D  LATIN CAPITAL LETTER Z WITH CARON
+    65533,  # 0x8F          UNDEFINED
+    65533,  # 0x90          UNDEFINED
+    8216,   # 0x91  0x2018  LEFT SINGLE QUOTATION MARK
+    8217,   # 0x92  0x2019  RIGHT SINGLE QUOTATION MARK
+    8220,   # 0x93  0x201C  LEFT DOUBLE QUOTATION MARK
+    8221,   # 0x94  0x201D  RIGHT DOUBLE QUOTATION MARK
+    8226,   # 0x95  0x2022  BULLET
+    8211,   # 0x96  0x2013  EN DASH
+    8212,   # 0x97  0x2014  EM DASH
+    732,    # 0x98  0x02DC  SMALL TILDE
+    8482,   # 0x99  0x2122  TRADE MARK SIGN
+    353,    # 0x9A  0x0161  LATIN SMALL LETTER S WITH CARON
+    8250,   # 0x9B  0x203A  SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
+    339,    # 0x9C  0x0153  LATIN SMALL LIGATURE OE
+    65533,  # 0x9D          UNDEFINED
+    382,    # 0x9E  0x017E  LATIN SMALL LETTER Z WITH CARON
+    376     # 0x9F  0x0178  LATIN CAPITAL LETTER Y WITH DIAERESIS
+)
+
+xmlEntities = frozenset(['lt;', 'gt;', 'amp;', 'apos;', 'quot;'])
+
+entities = {
+    "AElig": "\xc6",
+    "AElig;": "\xc6",
+    "AMP": "&",
+    "AMP;": "&",
+    "Aacute": "\xc1",
+    "Aacute;": "\xc1",
+    "Abreve;": "\u0102",
+    "Acirc": "\xc2",
+    "Acirc;": "\xc2",
+    "Acy;": "\u0410",
+    "Afr;": "\U0001d504",
+    "Agrave": "\xc0",
+    "Agrave;": "\xc0",
+    "Alpha;": "\u0391",
+    "Amacr;": "\u0100",
+    "And;": "\u2a53",
+    "Aogon;": "\u0104",
+    "Aopf;": "\U0001d538",
+    "ApplyFunction;": "\u2061",
+    "Aring": "\xc5",
+    "Aring;": "\xc5",
+    "Ascr;": "\U0001d49c",
+    "Assign;": "\u2254",
+    "Atilde": "\xc3",
+    "Atilde;": "\xc3",
+    "Auml": "\xc4",
+    "Auml;": "\xc4",
+    "Backslash;": "\u2216",
+    "Barv;": "\u2ae7",
+    "Barwed;": "\u2306",
+    "Bcy;": "\u0411",
+    "Because;": "\u2235",
+    "Bernoullis;": "\u212c",
+    "Beta;": "\u0392",
+    "Bfr;": "\U0001d505",
+    "Bopf;": "\U0001d539",
+    "Breve;": "\u02d8",
+    "Bscr;": "\u212c",
+    "Bumpeq;": "\u224e",
+    "CHcy;": "\u0427",
+    "COPY": "\xa9",
+    "COPY;": "\xa9",
+    "Cacute;": "\u0106",
+    "Cap;": "\u22d2",
+    "CapitalDifferentialD;": "\u2145",
+    "Cayleys;": "\u212d",
+    "Ccaron;": "\u010c",
+    "Ccedil": "\xc7",
+    "Ccedil;": "\xc7",
+    "Ccirc;": "\u0108",
+    "Cconint;": "\u2230",
+    "Cdot;": "\u010a",
+    "Cedilla;": "\xb8",
+    "CenterDot;": "\xb7",
+    "Cfr;": "\u212d",
+    "Chi;": "\u03a7",
+    "CircleDot;": "\u2299",
+    "CircleMinus;": "\u2296",
+    "CirclePlus;": "\u2295",
+    "CircleTimes;": "\u2297",
+    "ClockwiseContourIntegral;": "\u2232",
+    "CloseCurlyDoubleQuote;": "\u201d",
+    "CloseCurlyQuote;": "\u2019",
+    "Colon;": "\u2237",
+    "Colone;": "\u2a74",
+    "Congruent;": "\u2261",
+    "Conint;": "\u222f",
+    "ContourIntegral;": "\u222e",
+    "Copf;": "\u2102",
+    "Coproduct;": "\u2210",
+    "CounterClockwiseContourIntegral;": "\u2233",
+    "Cross;": "\u2a2f",
+    "Cscr;": "\U0001d49e",
+    "Cup;": "\u22d3",
+    "CupCap;": "\u224d",
+    "DD;": "\u2145",
+    "DDotrahd;": "\u2911",
+    "DJcy;": "\u0402",
+    "DScy;": "\u0405",
+    "DZcy;": "\u040f",
+    "Dagger;": "\u2021",
+    "Darr;": "\u21a1",
+    "Dashv;": "\u2ae4",
+    "Dcaron;": "\u010e",
+    "Dcy;": "\u0414",
+    "Del;": "\u2207",
+    "Delta;": "\u0394",
+    "Dfr;": "\U0001d507",
+    "DiacriticalAcute;": "\xb4",
+    "DiacriticalDot;": "\u02d9",
+    "DiacriticalDoubleAcute;": "\u02dd",
+    "DiacriticalGrave;": "`",
+    "DiacriticalTilde;": "\u02dc",
+    "Diamond;": "\u22c4",
+    "DifferentialD;": "\u2146",
+    "Dopf;": "\U0001d53b",
+    "Dot;": "\xa8",
+    "DotDot;": "\u20dc",
+    "DotEqual;": "\u2250",
+    "DoubleContourIntegral;": "\u222f",
+    "DoubleDot;": "\xa8",
+    "DoubleDownArrow;": "\u21d3",
+    "DoubleLeftArrow;": "\u21d0",
+    "DoubleLeftRightArrow;": "\u21d4",
+    "DoubleLeftTee;": "\u2ae4",
+    "DoubleLongLeftArrow;": "\u27f8",
+    "DoubleLongLeftRightArrow;": "\u27fa",
+    "DoubleLongRightArrow;": "\u27f9",
+    "DoubleRightArrow;": "\u21d2",
+    "DoubleRightTee;": "\u22a8",
+    "DoubleUpArrow;": "\u21d1",
+    "DoubleUpDownArrow;": "\u21d5",
+    "DoubleVerticalBar;": "\u2225",
+    "DownArrow;": "\u2193",
+    "DownArrowBar;": "\u2913",
+    "DownArrowUpArrow;": "\u21f5",
+    "DownBreve;": "\u0311",
+    "DownLeftRightVector;": "\u2950",
+    "DownLeftTeeVector;": "\u295e",
+    "DownLeftVector;": "\u21bd",
+    "DownLeftVectorBar;": "\u2956",
+    "DownRightTeeVector;": "\u295f",
+    "DownRightVector;": "\u21c1",
+    "DownRightVectorBar;": "\u2957",
+    "DownTee;": "\u22a4",
+    "DownTeeArrow;": "\u21a7",
+    "Downarrow;": "\u21d3",
+    "Dscr;": "\U0001d49f",
+    "Dstrok;": "\u0110",
+    "ENG;": "\u014a",
+    "ETH": "\xd0",
+    "ETH;": "\xd0",
+    "Eacute": "\xc9",
+    "Eacute;": "\xc9",
+    "Ecaron;": "\u011a",
+    "Ecirc": "\xca",
+    "Ecirc;": "\xca",
+    "Ecy;": "\u042d",
+    "Edot;": "\u0116",
+    "Efr;": "\U0001d508",
+    "Egrave": "\xc8",
+    "Egrave;": "\xc8",
+    "Element;": "\u2208",
+    "Emacr;": "\u0112",
+    "EmptySmallSquare;": "\u25fb",
+    "EmptyVerySmallSquare;": "\u25ab",
+    "Eogon;": "\u0118",
+    "Eopf;": "\U0001d53c",
+    "Epsilon;": "\u0395",
+    "Equal;": "\u2a75",
+    "EqualTilde;": "\u2242",
+    "Equilibrium;": "\u21cc",
+    "Escr;": "\u2130",
+    "Esim;": "\u2a73",
+    "Eta;": "\u0397",
+    "Euml": "\xcb",
+    "Euml;": "\xcb",
+    "Exists;": "\u2203",
+    "ExponentialE;": "\u2147",
+    "Fcy;": "\u0424",
+    "Ffr;": "\U0001d509",
+    "FilledSmallSquare;": "\u25fc",
+    "FilledVerySmallSquare;": "\u25aa",
+    "Fopf;": "\U0001d53d",
+    "ForAll;": "\u2200",
+    "Fouriertrf;": "\u2131",
+    "Fscr;": "\u2131",
+    "GJcy;": "\u0403",
+    "GT": ">",
+    "GT;": ">",
+    "Gamma;": "\u0393",
+    "Gammad;": "\u03dc",
+    "Gbreve;": "\u011e",
+    "Gcedil;": "\u0122",
+    "Gcirc;": "\u011c",
+    "Gcy;": "\u0413",
+    "Gdot;": "\u0120",
+    "Gfr;": "\U0001d50a",
+    "Gg;": "\u22d9",
+    "Gopf;": "\U0001d53e",
+    "GreaterEqual;": "\u2265",
+    "GreaterEqualLess;": "\u22db",
+    "GreaterFullEqual;": "\u2267",
+    "GreaterGreater;": "\u2aa2",
+    "GreaterLess;": "\u2277",
+    "GreaterSlantEqual;": "\u2a7e",
+    "GreaterTilde;": "\u2273",
+    "Gscr;": "\U0001d4a2",
+    "Gt;": "\u226b",
+    "HARDcy;": "\u042a",
+    "Hacek;": "\u02c7",
+    "Hat;": "^",
+    "Hcirc;": "\u0124",
+    "Hfr;": "\u210c",
+    "HilbertSpace;": "\u210b",
+    "Hopf;": "\u210d",
+    "HorizontalLine;": "\u2500",
+    "Hscr;": "\u210b",
+    "Hstrok;": "\u0126",
+    "HumpDownHump;": "\u224e",
+    "HumpEqual;": "\u224f",
+    "IEcy;": "\u0415",
+    "IJlig;": "\u0132",
+    "IOcy;": "\u0401",
+    "Iacute": "\xcd",
+    "Iacute;": "\xcd",
+    "Icirc": "\xce",
+    "Icirc;": "\xce",
+    "Icy;": "\u0418",
+    "Idot;": "\u0130",
+    "Ifr;": "\u2111",
+    "Igrave": "\xcc",
+    "Igrave;": "\xcc",
+    "Im;": "\u2111",
+    "Imacr;": "\u012a",
+    "ImaginaryI;": "\u2148",
+    "Implies;": "\u21d2",
+    "Int;": "\u222c",
+    "Integral;": "\u222b",
+    "Intersection;": "\u22c2",
+    "InvisibleComma;": "\u2063",
+    "InvisibleTimes;": "\u2062",
+    "Iogon;": "\u012e",
+    "Iopf;": "\U0001d540",
+    "Iota;": "\u0399",
+    "Iscr;": "\u2110",
+    "Itilde;": "\u0128",
+    "Iukcy;": "\u0406",
+    "Iuml": "\xcf",
+    "Iuml;": "\xcf",
+    "Jcirc;": "\u0134",
+    "Jcy;": "\u0419",
+    "Jfr;": "\U0001d50d",
+    "Jopf;": "\U0001d541",
+    "Jscr;": "\U0001d4a5",
+    "Jsercy;": "\u0408",
+    "Jukcy;": "\u0404",
+    "KHcy;": "\u0425",
+    "KJcy;": "\u040c",
+    "Kappa;": "\u039a",
+    "Kcedil;": "\u0136",
+    "Kcy;": "\u041a",
+    "Kfr;": "\U0001d50e",
+    "Kopf;": "\U0001d542",
+    "Kscr;": "\U0001d4a6",
+    "LJcy;": "\u0409",
+    "LT": "<",
+    "LT;": "<",
+    "Lacute;": "\u0139",
+    "Lambda;": "\u039b",
+    "Lang;": "\u27ea",
+    "Laplacetrf;": "\u2112",
+    "Larr;": "\u219e",
+    "Lcaron;": "\u013d",
+    "Lcedil;": "\u013b",
+    "Lcy;": "\u041b",
+    "LeftAngleBracket;": "\u27e8",
+    "LeftArrow;": "\u2190",
+    "LeftArrowBar;": "\u21e4",
+    "LeftArrowRightArrow;": "\u21c6",
+    "LeftCeiling;": "\u2308",
+    "LeftDoubleBracket;": "\u27e6",
+    "LeftDownTeeVector;": "\u2961",
+    "LeftDownVector;": "\u21c3",
+    "LeftDownVectorBar;": "\u2959",
+    "LeftFloor;": "\u230a",
+    "LeftRightArrow;": "\u2194",
+    "LeftRightVector;": "\u294e",
+    "LeftTee;": "\u22a3",
+    "LeftTeeArrow;": "\u21a4",
+    "LeftTeeVector;": "\u295a",
+    "LeftTriangle;": "\u22b2",
+    "LeftTriangleBar;": "\u29cf",
+    "LeftTriangleEqual;": "\u22b4",
+    "LeftUpDownVector;": "\u2951",
+    "LeftUpTeeVector;": "\u2960",
+    "LeftUpVector;": "\u21bf",
+    "LeftUpVectorBar;": "\u2958",
+    "LeftVector;": "\u21bc",
+    "LeftVectorBar;": "\u2952",
+    "Leftarrow;": "\u21d0",
+    "Leftrightarrow;": "\u21d4",
+    "LessEqualGreater;": "\u22da",
+    "LessFullEqual;": "\u2266",
+    "LessGreater;": "\u2276",
+    "LessLess;": "\u2aa1",
+    "LessSlantEqual;": "\u2a7d",
+    "LessTilde;": "\u2272",
+    "Lfr;": "\U0001d50f",
+    "Ll;": "\u22d8",
+    "Lleftarrow;": "\u21da",
+    "Lmidot;": "\u013f",
+    "LongLeftArrow;": "\u27f5",
+    "LongLeftRightArrow;": "\u27f7",
+    "LongRightArrow;": "\u27f6",
+    "Longleftarrow;": "\u27f8",
+    "Longleftrightarrow;": "\u27fa",
+    "Longrightarrow;": "\u27f9",
+    "Lopf;": "\U0001d543",
+    "LowerLeftArrow;": "\u2199",
+    "LowerRightArrow;": "\u2198",
+    "Lscr;": "\u2112",
+    "Lsh;": "\u21b0",
+    "Lstrok;": "\u0141",
+    "Lt;": "\u226a",
+    "Map;": "\u2905",
+    "Mcy;": "\u041c",
+    "MediumSpace;": "\u205f",
+    "Mellintrf;": "\u2133",
+    "Mfr;": "\U0001d510",
+    "MinusPlus;": "\u2213",
+    "Mopf;": "\U0001d544",
+    "Mscr;": "\u2133",
+    "Mu;": "\u039c",
+    "NJcy;": "\u040a",
+    "Nacute;": "\u0143",
+    "Ncaron;": "\u0147",
+    "Ncedil;": "\u0145",
+    "Ncy;": "\u041d",
+    "NegativeMediumSpace;": "\u200b",
+    "NegativeThickSpace;": "\u200b",
+    "NegativeThinSpace;": "\u200b",
+    "NegativeVeryThinSpace;": "\u200b",
+    "NestedGreaterGreater;": "\u226b",
+    "NestedLessLess;": "\u226a",
+    "NewLine;": "\n",
+    "Nfr;": "\U0001d511",
+    "NoBreak;": "\u2060",
+    "NonBreakingSpace;": "\xa0",
+    "Nopf;": "\u2115",
+    "Not;": "\u2aec",
+    "NotCongruent;": "\u2262",
+    "NotCupCap;": "\u226d",
+    "NotDoubleVerticalBar;": "\u2226",
+    "NotElement;": "\u2209",
+    "NotEqual;": "\u2260",
+    "NotEqualTilde;": "\u2242\u0338",
+    "NotExists;": "\u2204",
+    "NotGreater;": "\u226f",
+    "NotGreaterEqual;": "\u2271",
+    "NotGreaterFullEqual;": "\u2267\u0338",
+    "NotGreaterGreater;": "\u226b\u0338",
+    "NotGreaterLess;": "\u2279",
+    "NotGreaterSlantEqual;": "\u2a7e\u0338",
+    "NotGreaterTilde;": "\u2275",
+    "NotHumpDownHump;": "\u224e\u0338",
+    "NotHumpEqual;": "\u224f\u0338",
+    "NotLeftTriangle;": "\u22ea",
+    "NotLeftTriangleBar;": "\u29cf\u0338",
+    "NotLeftTriangleEqual;": "\u22ec",
+    "NotLess;": "\u226e",
+    "NotLessEqual;": "\u2270",
+    "NotLessGreater;": "\u2278",
+    "NotLessLess;": "\u226a\u0338",
+    "NotLessSlantEqual;": "\u2a7d\u0338",
+    "NotLessTilde;": "\u2274",
+    "NotNestedGreaterGreater;": "\u2aa2\u0338",
+    "NotNestedLessLess;": "\u2aa1\u0338",
+    "NotPrecedes;": "\u2280",
+    "NotPrecedesEqual;": "\u2aaf\u0338",
+    "NotPrecedesSlantEqual;": "\u22e0",
+    "NotReverseElement;": "\u220c",
+    "NotRightTriangle;": "\u22eb",
+    "NotRightTriangleBar;": "\u29d0\u0338",
+    "NotRightTriangleEqual;": "\u22ed",
+    "NotSquareSubset;": "\u228f\u0338",
+    "NotSquareSubsetEqual;": "\u22e2",
+    "NotSquareSuperset;": "\u2290\u0338",
+    "NotSquareSupersetEqual;": "\u22e3",
+    "NotSubset;": "\u2282\u20d2",
+    "NotSubsetEqual;": "\u2288",
+    "NotSucceeds;": "\u2281",
+    "NotSucceedsEqual;": "\u2ab0\u0338",
+    "NotSucceedsSlantEqual;": "\u22e1",
+    "NotSucceedsTilde;": "\u227f\u0338",
+    "NotSuperset;": "\u2283\u20d2",
+    "NotSupersetEqual;": "\u2289",
+    "NotTilde;": "\u2241",
+    "NotTildeEqual;": "\u2244",
+    "NotTildeFullEqual;": "\u2247",
+    "NotTildeTilde;": "\u2249",
+    "NotVerticalBar;": "\u2224",
+    "Nscr;": "\U0001d4a9",
+    "Ntilde": "\xd1",
+    "Ntilde;": "\xd1",
+    "Nu;": "\u039d",
+    "OElig;": "\u0152",
+    "Oacute": "\xd3",
+    "Oacute;": "\xd3",
+    "Ocirc": "\xd4",
+    "Ocirc;": "\xd4",
+    "Ocy;": "\u041e",
+    "Odblac;": "\u0150",
+    "Ofr;": "\U0001d512",
+    "Ograve": "\xd2",
+    "Ograve;": "\xd2",
+    "Omacr;": "\u014c",
+    "Omega;": "\u03a9",
+    "Omicron;": "\u039f",
+    "Oopf;": "\U0001d546",
+    "OpenCurlyDoubleQuote;": "\u201c",
+    "OpenCurlyQuote;": "\u2018",
+    "Or;": "\u2a54",
+    "Oscr;": "\U0001d4aa",
+    "Oslash": "\xd8",
+    "Oslash;": "\xd8",
+    "Otilde": "\xd5",
+    "Otilde;": "\xd5",
+    "Otimes;": "\u2a37",
+    "Ouml": "\xd6",
+    "Ouml;": "\xd6",
+    "OverBar;": "\u203e",
+    "OverBrace;": "\u23de",
+    "OverBracket;": "\u23b4",
+    "OverParenthesis;": "\u23dc",
+    "PartialD;": "\u2202",
+    "Pcy;": "\u041f",
+    "Pfr;": "\U0001d513",
+    "Phi;": "\u03a6",
+    "Pi;": "\u03a0",
+    "PlusMinus;": "\xb1",
+    "Poincareplane;": "\u210c",
+    "Popf;": "\u2119",
+    "Pr;": "\u2abb",
+    "Precedes;": "\u227a",
+    "PrecedesEqual;": "\u2aaf",
+    "PrecedesSlantEqual;": "\u227c",
+    "PrecedesTilde;": "\u227e",
+    "Prime;": "\u2033",
+    "Product;": "\u220f",
+    "Proportion;": "\u2237",
+    "Proportional;": "\u221d",
+    "Pscr;": "\U0001d4ab",
+    "Psi;": "\u03a8",
+    "QUOT": "\"",
+    "QUOT;": "\"",
+    "Qfr;": "\U0001d514",
+    "Qopf;": "\u211a",
+    "Qscr;": "\U0001d4ac",
+    "RBarr;": "\u2910",
+    "REG": "\xae",
+    "REG;": "\xae",
+    "Racute;": "\u0154",
+    "Rang;": "\u27eb",
+    "Rarr;": "\u21a0",
+    "Rarrtl;": "\u2916",
+    "Rcaron;": "\u0158",
+    "Rcedil;": "\u0156",
+    "Rcy;": "\u0420",
+    "Re;": "\u211c",
+    "ReverseElement;": "\u220b",
+    "ReverseEquilibrium;": "\u21cb",
+    "ReverseUpEquilibrium;": "\u296f",
+    "Rfr;": "\u211c",
+    "Rho;": "\u03a1",
+    "RightAngleBracket;": "\u27e9",
+    "RightArrow;": "\u2192",
+    "RightArrowBar;": "\u21e5",
+    "RightArrowLeftArrow;": "\u21c4",
+    "RightCeiling;": "\u2309",
+    "RightDoubleBracket;": "\u27e7",
+    "RightDownTeeVector;": "\u295d",
+    "RightDownVector;": "\u21c2",
+    "RightDownVectorBar;": "\u2955",
+    "RightFloor;": "\u230b",
+    "RightTee;": "\u22a2",
+    "RightTeeArrow;": "\u21a6",
+    "RightTeeVector;": "\u295b",
+    "RightTriangle;": "\u22b3",
+    "RightTriangleBar;": "\u29d0",
+    "RightTriangleEqual;": "\u22b5",
+    "RightUpDownVector;": "\u294f",
+    "RightUpTeeVector;": "\u295c",
+    "RightUpVector;": "\u21be",
+    "RightUpVectorBar;": "\u2954",
+    "RightVector;": "\u21c0",
+    "RightVectorBar;": "\u2953",
+    "Rightarrow;": "\u21d2",
+    "Ropf;": "\u211d",
+    "RoundImplies;": "\u2970",
+    "Rrightarrow;": "\u21db",
+    "Rscr;": "\u211b",
+    "Rsh;": "\u21b1",
+    "RuleDelayed;": "\u29f4",
+    "SHCHcy;": "\u0429",
+    "SHcy;": "\u0428",
+    "SOFTcy;": "\u042c",
+    "Sacute;": "\u015a",
+    "Sc;": "\u2abc",
+    "Scaron;": "\u0160",
+    "Scedil;": "\u015e",
+    "Scirc;": "\u015c",
+    "Scy;": "\u0421",
+    "Sfr;": "\U0001d516",
+    "ShortDownArrow;": "\u2193",
+    "ShortLeftArrow;": "\u2190",
+    "ShortRightArrow;": "\u2192",
+    "ShortUpArrow;": "\u2191",
+    "Sigma;": "\u03a3",
+    "SmallCircle;": "\u2218",
+    "Sopf;": "\U0001d54a",
+    "Sqrt;": "\u221a",
+    "Square;": "\u25a1",
+    "SquareIntersection;": "\u2293",
+    "SquareSubset;": "\u228f",
+    "SquareSubsetEqual;": "\u2291",
+    "SquareSuperset;": "\u2290",
+    "SquareSupersetEqual;": "\u2292",
+    "SquareUnion;": "\u2294",
+    "Sscr;": "\U0001d4ae",
+    "Star;": "\u22c6",
+    "Sub;": "\u22d0",
+    "Subset;": "\u22d0",
+    "SubsetEqual;": "\u2286",
+    "Succeeds;": "\u227b",
+    "SucceedsEqual;": "\u2ab0",
+    "SucceedsSlantEqual;": "\u227d",
+    "SucceedsTilde;": "\u227f",
+    "SuchThat;": "\u220b",
+    "Sum;": "\u2211",
+    "Sup;": "\u22d1",
+    "Superset;": "\u2283",
+    "SupersetEqual;": "\u2287",
+    "Supset;": "\u22d1",
+    "THORN": "\xde",
+    "THORN;": "\xde",
+    "TRADE;": "\u2122",
+    "TSHcy;": "\u040b",
+    "TScy;": "\u0426",
+    "Tab;": "\t",
+    "Tau;": "\u03a4",
+    "Tcaron;": "\u0164",
+    "Tcedil;": "\u0162",
+    "Tcy;": "\u0422",
+    "Tfr;": "\U0001d517",
+    "Therefore;": "\u2234",
+    "Theta;": "\u0398",
+    "ThickSpace;": "\u205f\u200a",
+    "ThinSpace;": "\u2009",
+    "Tilde;": "\u223c",
+    "TildeEqual;": "\u2243",
+    "TildeFullEqual;": "\u2245",
+    "TildeTilde;": "\u2248",
+    "Topf;": "\U0001d54b",
+    "TripleDot;": "\u20db",
+    "Tscr;": "\U0001d4af",
+    "Tstrok;": "\u0166",
+    "Uacute": "\xda",
+    "Uacute;": "\xda",
+    "Uarr;": "\u219f",
+    "Uarrocir;": "\u2949",
+    "Ubrcy;": "\u040e",
+    "Ubreve;": "\u016c",
+    "Ucirc": "\xdb",
+    "Ucirc;": "\xdb",
+    "Ucy;": "\u0423",
+    "Udblac;": "\u0170",
+    "Ufr;": "\U0001d518",
+    "Ugrave": "\xd9",
+    "Ugrave;": "\xd9",
+    "Umacr;": "\u016a",
+    "UnderBar;": "_",
+    "UnderBrace;": "\u23df",
+    "UnderBracket;": "\u23b5",
+    "UnderParenthesis;": "\u23dd",
+    "Union;": "\u22c3",
+    "UnionPlus;": "\u228e",
+    "Uogon;": "\u0172",
+    "Uopf;": "\U0001d54c",
+    "UpArrow;": "\u2191",
+    "UpArrowBar;": "\u2912",
+    "UpArrowDownArrow;": "\u21c5",
+    "UpDownArrow;": "\u2195",
+    "UpEquilibrium;": "\u296e",
+    "UpTee;": "\u22a5",
+    "UpTeeArrow;": "\u21a5",
+    "Uparrow;": "\u21d1",
+    "Updownarrow;": "\u21d5",
+    "UpperLeftArrow;": "\u2196",
+    "UpperRightArrow;": "\u2197",
+    "Upsi;": "\u03d2",
+    "Upsilon;": "\u03a5",
+    "Uring;": "\u016e",
+    "Uscr;": "\U0001d4b0",
+    "Utilde;": "\u0168",
+    "Uuml": "\xdc",
+    "Uuml;": "\xdc",
+    "VDash;": "\u22ab",
+    "Vbar;": "\u2aeb",
+    "Vcy;": "\u0412",
+    "Vdash;": "\u22a9",
+    "Vdashl;": "\u2ae6",
+    "Vee;": "\u22c1",
+    "Verbar;": "\u2016",
+    "Vert;": "\u2016",
+    "VerticalBar;": "\u2223",
+    "VerticalLine;": "|",
+    "VerticalSeparator;": "\u2758",
+    "VerticalTilde;": "\u2240",
+    "VeryThinSpace;": "\u200a",
+    "Vfr;": "\U0001d519",
+    "Vopf;": "\U0001d54d",
+    "Vscr;": "\U0001d4b1",
+    "Vvdash;": "\u22aa",
+    "Wcirc;": "\u0174",
+    "Wedge;": "\u22c0",
+    "Wfr;": "\U0001d51a",
+    "Wopf;": "\U0001d54e",
+    "Wscr;": "\U0001d4b2",
+    "Xfr;": "\U0001d51b",
+    "Xi;": "\u039e",
+    "Xopf;": "\U0001d54f",
+    "Xscr;": "\U0001d4b3",
+    "YAcy;": "\u042f",
+    "YIcy;": "\u0407",
+    "YUcy;": "\u042e",
+    "Yacute": "\xdd",
+    "Yacute;": "\xdd",
+    "Ycirc;": "\u0176",
+    "Ycy;": "\u042b",
+    "Yfr;": "\U0001d51c",
+    "Yopf;": "\U0001d550",
+    "Yscr;": "\U0001d4b4",
+    "Yuml;": "\u0178",
+    "ZHcy;": "\u0416",
+    "Zacute;": "\u0179",
+    "Zcaron;": "\u017d",
+    "Zcy;": "\u0417",
+    "Zdot;": "\u017b",
+    "ZeroWidthSpace;": "\u200b",
+    "Zeta;": "\u0396",
+    "Zfr;": "\u2128",
+    "Zopf;": "\u2124",
+    "Zscr;": "\U0001d4b5",
+    "aacute": "\xe1",
+    "aacute;": "\xe1",
+    "abreve;": "\u0103",
+    "ac;": "\u223e",
+    "acE;": "\u223e\u0333",
+    "acd;": "\u223f",
+    "acirc": "\xe2",
+    "acirc;": "\xe2",
+    "acute": "\xb4",
+    "acute;": "\xb4",
+    "acy;": "\u0430",
+    "aelig": "\xe6",
+    "aelig;": "\xe6",
+    "af;": "\u2061",
+    "afr;": "\U0001d51e",
+    "agrave": "\xe0",
+    "agrave;": "\xe0",
+    "alefsym;": "\u2135",
+    "aleph;": "\u2135",
+    "alpha;": "\u03b1",
+    "amacr;": "\u0101",
+    "amalg;": "\u2a3f",
+    "amp": "&",
+    "amp;": "&",
+    "and;": "\u2227",
+    "andand;": "\u2a55",
+    "andd;": "\u2a5c",
+    "andslope;": "\u2a58",
+    "andv;": "\u2a5a",
+    "ang;": "\u2220",
+    "ange;": "\u29a4",
+    "angle;": "\u2220",
+    "angmsd;": "\u2221",
+    "angmsdaa;": "\u29a8",
+    "angmsdab;": "\u29a9",
+    "angmsdac;": "\u29aa",
+    "angmsdad;": "\u29ab",
+    "angmsdae;": "\u29ac",
+    "angmsdaf;": "\u29ad",
+    "angmsdag;": "\u29ae",
+    "angmsdah;": "\u29af",
+    "angrt;": "\u221f",
+    "angrtvb;": "\u22be",
+    "angrtvbd;": "\u299d",
+    "angsph;": "\u2222",
+    "angst;": "\xc5",
+    "angzarr;": "\u237c",
+    "aogon;": "\u0105",
+    "aopf;": "\U0001d552",
+    "ap;": "\u2248",
+    "apE;": "\u2a70",
+    "apacir;": "\u2a6f",
+    "ape;": "\u224a",
+    "apid;": "\u224b",
+    "apos;": "'",
+    "approx;": "\u2248",
+    "approxeq;": "\u224a",
+    "aring": "\xe5",
+    "aring;": "\xe5",
+    "ascr;": "\U0001d4b6",
+    "ast;": "*",
+    "asymp;": "\u2248",
+    "asympeq;": "\u224d",
+    "atilde": "\xe3",
+    "atilde;": "\xe3",
+    "auml": "\xe4",
+    "auml;": "\xe4",
+    "awconint;": "\u2233",
+    "awint;": "\u2a11",
+    "bNot;": "\u2aed",
+    "backcong;": "\u224c",
+    "backepsilon;": "\u03f6",
+    "backprime;": "\u2035",
+    "backsim;": "\u223d",
+    "backsimeq;": "\u22cd",
+    "barvee;": "\u22bd",
+    "barwed;": "\u2305",
+    "barwedge;": "\u2305",
+    "bbrk;": "\u23b5",
+    "bbrktbrk;": "\u23b6",
+    "bcong;": "\u224c",
+    "bcy;": "\u0431",
+    "bdquo;": "\u201e",
+    "becaus;": "\u2235",
+    "because;": "\u2235",
+    "bemptyv;": "\u29b0",
+    "bepsi;": "\u03f6",
+    "bernou;": "\u212c",
+    "beta;": "\u03b2",
+    "beth;": "\u2136",
+    "between;": "\u226c",
+    "bfr;": "\U0001d51f",
+    "bigcap;": "\u22c2",
+    "bigcirc;": "\u25ef",
+    "bigcup;": "\u22c3",
+    "bigodot;": "\u2a00",
+    "bigoplus;": "\u2a01",
+    "bigotimes;": "\u2a02",
+    "bigsqcup;": "\u2a06",
+    "bigstar;": "\u2605",
+    "bigtriangledown;": "\u25bd",
+    "bigtriangleup;": "\u25b3",
+    "biguplus;": "\u2a04",
+    "bigvee;": "\u22c1",
+    "bigwedge;": "\u22c0",
+    "bkarow;": "\u290d",
+    "blacklozenge;": "\u29eb",
+    "blacksquare;": "\u25aa",
+    "blacktriangle;": "\u25b4",
+    "blacktriangledown;": "\u25be",
+    "blacktriangleleft;": "\u25c2",
+    "blacktriangleright;": "\u25b8",
+    "blank;": "\u2423",
+    "blk12;": "\u2592",
+    "blk14;": "\u2591",
+    "blk34;": "\u2593",
+    "block;": "\u2588",
+    "bne;": "=\u20e5",
+    "bnequiv;": "\u2261\u20e5",
+    "bnot;": "\u2310",
+    "bopf;": "\U0001d553",
+    "bot;": "\u22a5",
+    "bottom;": "\u22a5",
+    "bowtie;": "\u22c8",
+    "boxDL;": "\u2557",
+    "boxDR;": "\u2554",
+    "boxDl;": "\u2556",
+    "boxDr;": "\u2553",
+    "boxH;": "\u2550",
+    "boxHD;": "\u2566",
+    "boxHU;": "\u2569",
+    "boxHd;": "\u2564",
+    "boxHu;": "\u2567",
+    "boxUL;": "\u255d",
+    "boxUR;": "\u255a",
+    "boxUl;": "\u255c",
+    "boxUr;": "\u2559",
+    "boxV;": "\u2551",
+    "boxVH;": "\u256c",
+    "boxVL;": "\u2563",
+    "boxVR;": "\u2560",
+    "boxVh;": "\u256b",
+    "boxVl;": "\u2562",
+    "boxVr;": "\u255f",
+    "boxbox;": "\u29c9",
+    "boxdL;": "\u2555",
+    "boxdR;": "\u2552",
+    "boxdl;": "\u2510",
+    "boxdr;": "\u250c",
+    "boxh;": "\u2500",
+    "boxhD;": "\u2565",
+    "boxhU;": "\u2568",
+    "boxhd;": "\u252c",
+    "boxhu;": "\u2534",
+    "boxminus;": "\u229f",
+    "boxplus;": "\u229e",
+    "boxtimes;": "\u22a0",
+    "boxuL;": "\u255b",
+    "boxuR;": "\u2558",
+    "boxul;": "\u2518",
+    "boxur;": "\u2514",
+    "boxv;": "\u2502",
+    "boxvH;": "\u256a",
+    "boxvL;": "\u2561",
+    "boxvR;": "\u255e",
+    "boxvh;": "\u253c",
+    "boxvl;": "\u2524",
+    "boxvr;": "\u251c",
+    "bprime;": "\u2035",
+    "breve;": "\u02d8",
+    "brvbar": "\xa6",
+    "brvbar;": "\xa6",
+    "bscr;": "\U0001d4b7",
+    "bsemi;": "\u204f",
+    "bsim;": "\u223d",
+    "bsime;": "\u22cd",
+    "bsol;": "\\",
+    "bsolb;": "\u29c5",
+    "bsolhsub;": "\u27c8",
+    "bull;": "\u2022",
+    "bullet;": "\u2022",
+    "bump;": "\u224e",
+    "bumpE;": "\u2aae",
+    "bumpe;": "\u224f",
+    "bumpeq;": "\u224f",
+    "cacute;": "\u0107",
+    "cap;": "\u2229",
+    "capand;": "\u2a44",
+    "capbrcup;": "\u2a49",
+    "capcap;": "\u2a4b",
+    "capcup;": "\u2a47",
+    "capdot;": "\u2a40",
+    "caps;": "\u2229\ufe00",
+    "caret;": "\u2041",
+    "caron;": "\u02c7",
+    "ccaps;": "\u2a4d",
+    "ccaron;": "\u010d",
+    "ccedil": "\xe7",
+    "ccedil;": "\xe7",
+    "ccirc;": "\u0109",
+    "ccups;": "\u2a4c",
+    "ccupssm;": "\u2a50",
+    "cdot;": "\u010b",
+    "cedil": "\xb8",
+    "cedil;": "\xb8",
+    "cemptyv;": "\u29b2",
+    "cent": "\xa2",
+    "cent;": "\xa2",
+    "centerdot;": "\xb7",
+    "cfr;": "\U0001d520",
+    "chcy;": "\u0447",
+    "check;": "\u2713",
+    "checkmark;": "\u2713",
+    "chi;": "\u03c7",
+    "cir;": "\u25cb",
+    "cirE;": "\u29c3",
+    "circ;": "\u02c6",
+    "circeq;": "\u2257",
+    "circlearrowleft;": "\u21ba",
+    "circlearrowright;": "\u21bb",
+    "circledR;": "\xae",
+    "circledS;": "\u24c8",
+    "circledast;": "\u229b",
+    "circledcirc;": "\u229a",
+    "circleddash;": "\u229d",
+    "cire;": "\u2257",
+    "cirfnint;": "\u2a10",
+    "cirmid;": "\u2aef",
+    "cirscir;": "\u29c2",
+    "clubs;": "\u2663",
+    "clubsuit;": "\u2663",
+    "colon;": ":",
+    "colone;": "\u2254",
+    "coloneq;": "\u2254",
+    "comma;": ",",
+    "commat;": "@",
+    "comp;": "\u2201",
+    "compfn;": "\u2218",
+    "complement;": "\u2201",
+    "complexes;": "\u2102",
+    "cong;": "\u2245",
+    "congdot;": "\u2a6d",
+    "conint;": "\u222e",
+    "copf;": "\U0001d554",
+    "coprod;": "\u2210",
+    "copy": "\xa9",
+    "copy;": "\xa9",
+    "copysr;": "\u2117",
+    "crarr;": "\u21b5",
+    "cross;": "\u2717",
+    "cscr;": "\U0001d4b8",
+    "csub;": "\u2acf",
+    "csube;": "\u2ad1",
+    "csup;": "\u2ad0",
+    "csupe;": "\u2ad2",
+    "ctdot;": "\u22ef",
+    "cudarrl;": "\u2938",
+    "cudarrr;": "\u2935",
+    "cuepr;": "\u22de",
+    "cuesc;": "\u22df",
+    "cularr;": "\u21b6",
+    "cularrp;": "\u293d",
+    "cup;": "\u222a",
+    "cupbrcap;": "\u2a48",
+    "cupcap;": "\u2a46",
+    "cupcup;": "\u2a4a",
+    "cupdot;": "\u228d",
+    "cupor;": "\u2a45",
+    "cups;": "\u222a\ufe00",
+    "curarr;": "\u21b7",
+    "curarrm;": "\u293c",
+    "curlyeqprec;": "\u22de",
+    "curlyeqsucc;": "\u22df",
+    "curlyvee;": "\u22ce",
+    "curlywedge;": "\u22cf",
+    "curren": "\xa4",
+    "curren;": "\xa4",
+    "curvearrowleft;": "\u21b6",
+    "curvearrowright;": "\u21b7",
+    "cuvee;": "\u22ce",
+    "cuwed;": "\u22cf",
+    "cwconint;": "\u2232",
+    "cwint;": "\u2231",
+    "cylcty;": "\u232d",
+    "dArr;": "\u21d3",
+    "dHar;": "\u2965",
+    "dagger;": "\u2020",
+    "daleth;": "\u2138",
+    "darr;": "\u2193",
+    "dash;": "\u2010",
+    "dashv;": "\u22a3",
+    "dbkarow;": "\u290f",
+    "dblac;": "\u02dd",
+    "dcaron;": "\u010f",
+    "dcy;": "\u0434",
+    "dd;": "\u2146",
+    "ddagger;": "\u2021",
+    "ddarr;": "\u21ca",
+    "ddotseq;": "\u2a77",
+    "deg": "\xb0",
+    "deg;": "\xb0",
+    "delta;": "\u03b4",
+    "demptyv;": "\u29b1",
+    "dfisht;": "\u297f",
+    "dfr;": "\U0001d521",
+    "dharl;": "\u21c3",
+    "dharr;": "\u21c2",
+    "diam;": "\u22c4",
+    "diamond;": "\u22c4",
+    "diamondsuit;": "\u2666",
+    "diams;": "\u2666",
+    "die;": "\xa8",
+    "digamma;": "\u03dd",
+    "disin;": "\u22f2",
+    "div;": "\xf7",
+    "divide": "\xf7",
+    "divide;": "\xf7",
+    "divideontimes;": "\u22c7",
+    "divonx;": "\u22c7",
+    "djcy;": "\u0452",
+    "dlcorn;": "\u231e",
+    "dlcrop;": "\u230d",
+    "dollar;": "$",
+    "dopf;": "\U0001d555",
+    "dot;": "\u02d9",
+    "doteq;": "\u2250",
+    "doteqdot;": "\u2251",
+    "dotminus;": "\u2238",
+    "dotplus;": "\u2214",
+    "dotsquare;": "\u22a1",
+    "doublebarwedge;": "\u2306",
+    "downarrow;": "\u2193",
+    "downdownarrows;": "\u21ca",
+    "downharpoonleft;": "\u21c3",
+    "downharpoonright;": "\u21c2",
+    "drbkarow;": "\u2910",
+    "drcorn;": "\u231f",
+    "drcrop;": "\u230c",
+    "dscr;": "\U0001d4b9",
+    "dscy;": "\u0455",
+    "dsol;": "\u29f6",
+    "dstrok;": "\u0111",
+    "dtdot;": "\u22f1",
+    "dtri;": "\u25bf",
+    "dtrif;": "\u25be",
+    "duarr;": "\u21f5",
+    "duhar;": "\u296f",
+    "dwangle;": "\u29a6",
+    "dzcy;": "\u045f",
+    "dzigrarr;": "\u27ff",
+    "eDDot;": "\u2a77",
+    "eDot;": "\u2251",
+    "eacute": "\xe9",
+    "eacute;": "\xe9",
+    "easter;": "\u2a6e",
+    "ecaron;": "\u011b",
+    "ecir;": "\u2256",
+    "ecirc": "\xea",
+    "ecirc;": "\xea",
+    "ecolon;": "\u2255",
+    "ecy;": "\u044d",
+    "edot;": "\u0117",
+    "ee;": "\u2147",
+    "efDot;": "\u2252",
+    "efr;": "\U0001d522",
+    "eg;": "\u2a9a",
+    "egrave": "\xe8",
+    "egrave;": "\xe8",
+    "egs;": "\u2a96",
+    "egsdot;": "\u2a98",
+    "el;": "\u2a99",
+    "elinters;": "\u23e7",
+    "ell;": "\u2113",
+    "els;": "\u2a95",
+    "elsdot;": "\u2a97",
+    "emacr;": "\u0113",
+    "empty;": "\u2205",
+    "emptyset;": "\u2205",
+    "emptyv;": "\u2205",
+    "emsp13;": "\u2004",
+    "emsp14;": "\u2005",
+    "emsp;": "\u2003",
+    "eng;": "\u014b",
+    "ensp;": "\u2002",
+    "eogon;": "\u0119",
+    "eopf;": "\U0001d556",
+    "epar;": "\u22d5",
+    "eparsl;": "\u29e3",
+    "eplus;": "\u2a71",
+    "epsi;": "\u03b5",
+    "epsilon;": "\u03b5",
+    "epsiv;": "\u03f5",
+    "eqcirc;": "\u2256",
+    "eqcolon;": "\u2255",
+    "eqsim;": "\u2242",
+    "eqslantgtr;": "\u2a96",
+    "eqslantless;": "\u2a95",
+    "equals;": "=",
+    "equest;": "\u225f",
+    "equiv;": "\u2261",
+    "equivDD;": "\u2a78",
+    "eqvparsl;": "\u29e5",
+    "erDot;": "\u2253",
+    "erarr;": "\u2971",
+    "escr;": "\u212f",
+    "esdot;": "\u2250",
+    "esim;": "\u2242",
+    "eta;": "\u03b7",
+    "eth": "\xf0",
+    "eth;": "\xf0",
+    "euml": "\xeb",
+    "euml;": "\xeb",
+    "euro;": "\u20ac",
+    "excl;": "!",
+    "exist;": "\u2203",
+    "expectation;": "\u2130",
+    "exponentiale;": "\u2147",
+    "fallingdotseq;": "\u2252",
+    "fcy;": "\u0444",
+    "female;": "\u2640",
+    "ffilig;": "\ufb03",
+    "fflig;": "\ufb00",
+    "ffllig;": "\ufb04",
+    "ffr;": "\U0001d523",
+    "filig;": "\ufb01",
+    "fjlig;": "fj",
+    "flat;": "\u266d",
+    "fllig;": "\ufb02",
+    "fltns;": "\u25b1",
+    "fnof;": "\u0192",
+    "fopf;": "\U0001d557",
+    "forall;": "\u2200",
+    "fork;": "\u22d4",
+    "forkv;": "\u2ad9",
+    "fpartint;": "\u2a0d",
+    "frac12": "\xbd",
+    "frac12;": "\xbd",
+    "frac13;": "\u2153",
+    "frac14": "\xbc",
+    "frac14;": "\xbc",
+    "frac15;": "\u2155",
+    "frac16;": "\u2159",
+    "frac18;": "\u215b",
+    "frac23;": "\u2154",
+    "frac25;": "\u2156",
+    "frac34": "\xbe",
+    "frac34;": "\xbe",
+    "frac35;": "\u2157",
+    "frac38;": "\u215c",
+    "frac45;": "\u2158",
+    "frac56;": "\u215a",
+    "frac58;": "\u215d",
+    "frac78;": "\u215e",
+    "frasl;": "\u2044",
+    "frown;": "\u2322",
+    "fscr;": "\U0001d4bb",
+    "gE;": "\u2267",
+    "gEl;": "\u2a8c",
+    "gacute;": "\u01f5",
+    "gamma;": "\u03b3",
+    "gammad;": "\u03dd",
+    "gap;": "\u2a86",
+    "gbreve;": "\u011f",
+    "gcirc;": "\u011d",
+    "gcy;": "\u0433",
+    "gdot;": "\u0121",
+    "ge;": "\u2265",
+    "gel;": "\u22db",
+    "geq;": "\u2265",
+    "geqq;": "\u2267",
+    "geqslant;": "\u2a7e",
+    "ges;": "\u2a7e",
+    "gescc;": "\u2aa9",
+    "gesdot;": "\u2a80",
+    "gesdoto;": "\u2a82",
+    "gesdotol;": "\u2a84",
+    "gesl;": "\u22db\ufe00",
+    "gesles;": "\u2a94",
+    "gfr;": "\U0001d524",
+    "gg;": "\u226b",
+    "ggg;": "\u22d9",
+    "gimel;": "\u2137",
+    "gjcy;": "\u0453",
+    "gl;": "\u2277",
+    "glE;": "\u2a92",
+    "gla;": "\u2aa5",
+    "glj;": "\u2aa4",
+    "gnE;": "\u2269",
+    "gnap;": "\u2a8a",
+    "gnapprox;": "\u2a8a",
+    "gne;": "\u2a88",
+    "gneq;": "\u2a88",
+    "gneqq;": "\u2269",
+    "gnsim;": "\u22e7",
+    "gopf;": "\U0001d558",
+    "grave;": "`",
+    "gscr;": "\u210a",
+    "gsim;": "\u2273",
+    "gsime;": "\u2a8e",
+    "gsiml;": "\u2a90",
+    "gt": ">",
+    "gt;": ">",
+    "gtcc;": "\u2aa7",
+    "gtcir;": "\u2a7a",
+    "gtdot;": "\u22d7",
+    "gtlPar;": "\u2995",
+    "gtquest;": "\u2a7c",
+    "gtrapprox;": "\u2a86",
+    "gtrarr;": "\u2978",
+    "gtrdot;": "\u22d7",
+    "gtreqless;": "\u22db",
+    "gtreqqless;": "\u2a8c",
+    "gtrless;": "\u2277",
+    "gtrsim;": "\u2273",
+    "gvertneqq;": "\u2269\ufe00",
+    "gvnE;": "\u2269\ufe00",
+    "hArr;": "\u21d4",
+    "hairsp;": "\u200a",
+    "half;": "\xbd",
+    "hamilt;": "\u210b",
+    "hardcy;": "\u044a",
+    "harr;": "\u2194",
+    "harrcir;": "\u2948",
+    "harrw;": "\u21ad",
+    "hbar;": "\u210f",
+    "hcirc;": "\u0125",
+    "hearts;": "\u2665",
+    "heartsuit;": "\u2665",
+    "hellip;": "\u2026",
+    "hercon;": "\u22b9",
+    "hfr;": "\U0001d525",
+    "hksearow;": "\u2925",
+    "hkswarow;": "\u2926",
+    "hoarr;": "\u21ff",
+    "homtht;": "\u223b",
+    "hookleftarrow;": "\u21a9",
+    "hookrightarrow;": "\u21aa",
+    "hopf;": "\U0001d559",
+    "horbar;": "\u2015",
+    "hscr;": "\U0001d4bd",
+    "hslash;": "\u210f",
+    "hstrok;": "\u0127",
+    "hybull;": "\u2043",
+    "hyphen;": "\u2010",
+    "iacute": "\xed",
+    "iacute;": "\xed",
+    "ic;": "\u2063",
+    "icirc": "\xee",
+    "icirc;": "\xee",
+    "icy;": "\u0438",
+    "iecy;": "\u0435",
+    "iexcl": "\xa1",
+    "iexcl;": "\xa1",
+    "iff;": "\u21d4",
+    "ifr;": "\U0001d526",
+    "igrave": "\xec",
+    "igrave;": "\xec",
+    "ii;": "\u2148",
+    "iiiint;": "\u2a0c",
+    "iiint;": "\u222d",
+    "iinfin;": "\u29dc",
+    "iiota;": "\u2129",
+    "ijlig;": "\u0133",
+    "imacr;": "\u012b",
+    "image;": "\u2111",
+    "imagline;": "\u2110",
+    "imagpart;": "\u2111",
+    "imath;": "\u0131",
+    "imof;": "\u22b7",
+    "imped;": "\u01b5",
+    "in;": "\u2208",
+    "incare;": "\u2105",
+    "infin;": "\u221e",
+    "infintie;": "\u29dd",
+    "inodot;": "\u0131",
+    "int;": "\u222b",
+    "intcal;": "\u22ba",
+    "integers;": "\u2124",
+    "intercal;": "\u22ba",
+    "intlarhk;": "\u2a17",
+    "intprod;": "\u2a3c",
+    "iocy;": "\u0451",
+    "iogon;": "\u012f",
+    "iopf;": "\U0001d55a",
+    "iota;": "\u03b9",
+    "iprod;": "\u2a3c",
+    "iquest": "\xbf",
+    "iquest;": "\xbf",
+    "iscr;": "\U0001d4be",
+    "isin;": "\u2208",
+    "isinE;": "\u22f9",
+    "isindot;": "\u22f5",
+    "isins;": "\u22f4",
+    "isinsv;": "\u22f3",
+    "isinv;": "\u2208",
+    "it;": "\u2062",
+    "itilde;": "\u0129",
+    "iukcy;": "\u0456",
+    "iuml": "\xef",
+    "iuml;": "\xef",
+    "jcirc;": "\u0135",
+    "jcy;": "\u0439",
+    "jfr;": "\U0001d527",
+    "jmath;": "\u0237",
+    "jopf;": "\U0001d55b",
+    "jscr;": "\U0001d4bf",
+    "jsercy;": "\u0458",
+    "jukcy;": "\u0454",
+    "kappa;": "\u03ba",
+    "kappav;": "\u03f0",
+    "kcedil;": "\u0137",
+    "kcy;": "\u043a",
+    "kfr;": "\U0001d528",
+    "kgreen;": "\u0138",
+    "khcy;": "\u0445",
+    "kjcy;": "\u045c",
+    "kopf;": "\U0001d55c",
+    "kscr;": "\U0001d4c0",
+    "lAarr;": "\u21da",
+    "lArr;": "\u21d0",
+    "lAtail;": "\u291b",
+    "lBarr;": "\u290e",
+    "lE;": "\u2266",
+    "lEg;": "\u2a8b",
+    "lHar;": "\u2962",
+    "lacute;": "\u013a",
+    "laemptyv;": "\u29b4",
+    "lagran;": "\u2112",
+    "lambda;": "\u03bb",
+    "lang;": "\u27e8",
+    "langd;": "\u2991",
+    "langle;": "\u27e8",
+    "lap;": "\u2a85",
+    "laquo": "\xab",
+    "laquo;": "\xab",
+    "larr;": "\u2190",
+    "larrb;": "\u21e4",
+    "larrbfs;": "\u291f",
+    "larrfs;": "\u291d",
+    "larrhk;": "\u21a9",
+    "larrlp;": "\u21ab",
+    "larrpl;": "\u2939",
+    "larrsim;": "\u2973",
+    "larrtl;": "\u21a2",
+    "lat;": "\u2aab",
+    "latail;": "\u2919",
+    "late;": "\u2aad",
+    "lates;": "\u2aad\ufe00",
+    "lbarr;": "\u290c",
+    "lbbrk;": "\u2772",
+    "lbrace;": "{",
+    "lbrack;": "[",
+    "lbrke;": "\u298b",
+    "lbrksld;": "\u298f",
+    "lbrkslu;": "\u298d",
+    "lcaron;": "\u013e",
+    "lcedil;": "\u013c",
+    "lceil;": "\u2308",
+    "lcub;": "{",
+    "lcy;": "\u043b",
+    "ldca;": "\u2936",
+    "ldquo;": "\u201c",
+    "ldquor;": "\u201e",
+    "ldrdhar;": "\u2967",
+    "ldrushar;": "\u294b",
+    "ldsh;": "\u21b2",
+    "le;": "\u2264",
+    "leftarrow;": "\u2190",
+    "leftarrowtail;": "\u21a2",
+    "leftharpoondown;": "\u21bd",
+    "leftharpoonup;": "\u21bc",
+    "leftleftarrows;": "\u21c7",
+    "leftrightarrow;": "\u2194",
+    "leftrightarrows;": "\u21c6",
+    "leftrightharpoons;": "\u21cb",
+    "leftrightsquigarrow;": "\u21ad",
+    "leftthreetimes;": "\u22cb",
+    "leg;": "\u22da",
+    "leq;": "\u2264",
+    "leqq;": "\u2266",
+    "leqslant;": "\u2a7d",
+    "les;": "\u2a7d",
+    "lescc;": "\u2aa8",
+    "lesdot;": "\u2a7f",
+    "lesdoto;": "\u2a81",
+    "lesdotor;": "\u2a83",
+    "lesg;": "\u22da\ufe00",
+    "lesges;": "\u2a93",
+    "lessapprox;": "\u2a85",
+    "lessdot;": "\u22d6",
+    "lesseqgtr;": "\u22da",
+    "lesseqqgtr;": "\u2a8b",
+    "lessgtr;": "\u2276",
+    "lesssim;": "\u2272",
+    "lfisht;": "\u297c",
+    "lfloor;": "\u230a",
+    "lfr;": "\U0001d529",
+    "lg;": "\u2276",
+    "lgE;": "\u2a91",
+    "lhard;": "\u21bd",
+    "lharu;": "\u21bc",
+    "lharul;": "\u296a",
+    "lhblk;": "\u2584",
+    "ljcy;": "\u0459",
+    "ll;": "\u226a",
+    "llarr;": "\u21c7",
+    "llcorner;": "\u231e",
+    "llhard;": "\u296b",
+    "lltri;": "\u25fa",
+    "lmidot;": "\u0140",
+    "lmoust;": "\u23b0",
+    "lmoustache;": "\u23b0",
+    "lnE;": "\u2268",
+    "lnap;": "\u2a89",
+    "lnapprox;": "\u2a89",
+    "lne;": "\u2a87",
+    "lneq;": "\u2a87",
+    "lneqq;": "\u2268",
+    "lnsim;": "\u22e6",
+    "loang;": "\u27ec",
+    "loarr;": "\u21fd",
+    "lobrk;": "\u27e6",
+    "longleftarrow;": "\u27f5",
+    "longleftrightarrow;": "\u27f7",
+    "longmapsto;": "\u27fc",
+    "longrightarrow;": "\u27f6",
+    "looparrowleft;": "\u21ab",
+    "looparrowright;": "\u21ac",
+    "lopar;": "\u2985",
+    "lopf;": "\U0001d55d",
+    "loplus;": "\u2a2d",
+    "lotimes;": "\u2a34",
+    "lowast;": "\u2217",
+    "lowbar;": "_",
+    "loz;": "\u25ca",
+    "lozenge;": "\u25ca",
+    "lozf;": "\u29eb",
+    "lpar;": "(",
+    "lparlt;": "\u2993",
+    "lrarr;": "\u21c6",
+    "lrcorner;": "\u231f",
+    "lrhar;": "\u21cb",
+    "lrhard;": "\u296d",
+    "lrm;": "\u200e",
+    "lrtri;": "\u22bf",
+    "lsaquo;": "\u2039",
+    "lscr;": "\U0001d4c1",
+    "lsh;": "\u21b0",
+    "lsim;": "\u2272",
+    "lsime;": "\u2a8d",
+    "lsimg;": "\u2a8f",
+    "lsqb;": "[",
+    "lsquo;": "\u2018",
+    "lsquor;": "\u201a",
+    "lstrok;": "\u0142",
+    "lt": "<",
+    "lt;": "<",
+    "ltcc;": "\u2aa6",
+    "ltcir;": "\u2a79",
+    "ltdot;": "\u22d6",
+    "lthree;": "\u22cb",
+    "ltimes;": "\u22c9",
+    "ltlarr;": "\u2976",
+    "ltquest;": "\u2a7b",
+    "ltrPar;": "\u2996",
+    "ltri;": "\u25c3",
+    "ltrie;": "\u22b4",
+    "ltrif;": "\u25c2",
+    "lurdshar;": "\u294a",
+    "luruhar;": "\u2966",
+    "lvertneqq;": "\u2268\ufe00",
+    "lvnE;": "\u2268\ufe00",
+    "mDDot;": "\u223a",
+    "macr": "\xaf",
+    "macr;": "\xaf",
+    "male;": "\u2642",
+    "malt;": "\u2720",
+    "maltese;": "\u2720",
+    "map;": "\u21a6",
+    "mapsto;": "\u21a6",
+    "mapstodown;": "\u21a7",
+    "mapstoleft;": "\u21a4",
+    "mapstoup;": "\u21a5",
+    "marker;": "\u25ae",
+    "mcomma;": "\u2a29",
+    "mcy;": "\u043c",
+    "mdash;": "\u2014",
+    "measuredangle;": "\u2221",
+    "mfr;": "\U0001d52a",
+    "mho;": "\u2127",
+    "micro": "\xb5",
+    "micro;": "\xb5",
+    "mid;": "\u2223",
+    "midast;": "*",
+    "midcir;": "\u2af0",
+    "middot": "\xb7",
+    "middot;": "\xb7",
+    "minus;": "\u2212",
+    "minusb;": "\u229f",
+    "minusd;": "\u2238",
+    "minusdu;": "\u2a2a",
+    "mlcp;": "\u2adb",
+    "mldr;": "\u2026",
+    "mnplus;": "\u2213",
+    "models;": "\u22a7",
+    "mopf;": "\U0001d55e",
+    "mp;": "\u2213",
+    "mscr;": "\U0001d4c2",
+    "mstpos;": "\u223e",
+    "mu;": "\u03bc",
+    "multimap;": "\u22b8",
+    "mumap;": "\u22b8",
+    "nGg;": "\u22d9\u0338",
+    "nGt;": "\u226b\u20d2",
+    "nGtv;": "\u226b\u0338",
+    "nLeftarrow;": "\u21cd",
+    "nLeftrightarrow;": "\u21ce",
+    "nLl;": "\u22d8\u0338",
+    "nLt;": "\u226a\u20d2",
+    "nLtv;": "\u226a\u0338",
+    "nRightarrow;": "\u21cf",
+    "nVDash;": "\u22af",
+    "nVdash;": "\u22ae",
+    "nabla;": "\u2207",
+    "nacute;": "\u0144",
+    "nang;": "\u2220\u20d2",
+    "nap;": "\u2249",
+    "napE;": "\u2a70\u0338",
+    "napid;": "\u224b\u0338",
+    "napos;": "\u0149",
+    "napprox;": "\u2249",
+    "natur;": "\u266e",
+    "natural;": "\u266e",
+    "naturals;": "\u2115",
+    "nbsp": "\xa0",
+    "nbsp;": "\xa0",
+    "nbump;": "\u224e\u0338",
+    "nbumpe;": "\u224f\u0338",
+    "ncap;": "\u2a43",
+    "ncaron;": "\u0148",
+    "ncedil;": "\u0146",
+    "ncong;": "\u2247",
+    "ncongdot;": "\u2a6d\u0338",
+    "ncup;": "\u2a42",
+    "ncy;": "\u043d",
+    "ndash;": "\u2013",
+    "ne;": "\u2260",
+    "neArr;": "\u21d7",
+    "nearhk;": "\u2924",
+    "nearr;": "\u2197",
+    "nearrow;": "\u2197",
+    "nedot;": "\u2250\u0338",
+    "nequiv;": "\u2262",
+    "nesear;": "\u2928",
+    "nesim;": "\u2242\u0338",
+    "nexist;": "\u2204",
+    "nexists;": "\u2204",
+    "nfr;": "\U0001d52b",
+    "ngE;": "\u2267\u0338",
+    "nge;": "\u2271",
+    "ngeq;": "\u2271",
+    "ngeqq;": "\u2267\u0338",
+    "ngeqslant;": "\u2a7e\u0338",
+    "nges;": "\u2a7e\u0338",
+    "ngsim;": "\u2275",
+    "ngt;": "\u226f",
+    "ngtr;": "\u226f",
+    "nhArr;": "\u21ce",
+    "nharr;": "\u21ae",
+    "nhpar;": "\u2af2",
+    "ni;": "\u220b",
+    "nis;": "\u22fc",
+    "nisd;": "\u22fa",
+    "niv;": "\u220b",
+    "njcy;": "\u045a",
+    "nlArr;": "\u21cd",
+    "nlE;": "\u2266\u0338",
+    "nlarr;": "\u219a",
+    "nldr;": "\u2025",
+    "nle;": "\u2270",
+    "nleftarrow;": "\u219a",
+    "nleftrightarrow;": "\u21ae",
+    "nleq;": "\u2270",
+    "nleqq;": "\u2266\u0338",
+    "nleqslant;": "\u2a7d\u0338",
+    "nles;": "\u2a7d\u0338",
+    "nless;": "\u226e",
+    "nlsim;": "\u2274",
+    "nlt;": "\u226e",
+    "nltri;": "\u22ea",
+    "nltrie;": "\u22ec",
+    "nmid;": "\u2224",
+    "nopf;": "\U0001d55f",
+    "not": "\xac",
+    "not;": "\xac",
+    "notin;": "\u2209",
+    "notinE;": "\u22f9\u0338",
+    "notindot;": "\u22f5\u0338",
+    "notinva;": "\u2209",
+    "notinvb;": "\u22f7",
+    "notinvc;": "\u22f6",
+    "notni;": "\u220c",
+    "notniva;": "\u220c",
+    "notnivb;": "\u22fe",
+    "notnivc;": "\u22fd",
+    "npar;": "\u2226",
+    "nparallel;": "\u2226",
+    "nparsl;": "\u2afd\u20e5",
+    "npart;": "\u2202\u0338",
+    "npolint;": "\u2a14",
+    "npr;": "\u2280",
+    "nprcue;": "\u22e0",
+    "npre;": "\u2aaf\u0338",
+    "nprec;": "\u2280",
+    "npreceq;": "\u2aaf\u0338",
+    "nrArr;": "\u21cf",
+    "nrarr;": "\u219b",
+    "nrarrc;": "\u2933\u0338",
+    "nrarrw;": "\u219d\u0338",
+    "nrightarrow;": "\u219b",
+    "nrtri;": "\u22eb",
+    "nrtrie;": "\u22ed",
+    "nsc;": "\u2281",
+    "nsccue;": "\u22e1",
+    "nsce;": "\u2ab0\u0338",
+    "nscr;": "\U0001d4c3",
+    "nshortmid;": "\u2224",
+    "nshortparallel;": "\u2226",
+    "nsim;": "\u2241",
+    "nsime;": "\u2244",
+    "nsimeq;": "\u2244",
+    "nsmid;": "\u2224",
+    "nspar;": "\u2226",
+    "nsqsube;": "\u22e2",
+    "nsqsupe;": "\u22e3",
+    "nsub;": "\u2284",
+    "nsubE;": "\u2ac5\u0338",
+    "nsube;": "\u2288",
+    "nsubset;": "\u2282\u20d2",
+    "nsubseteq;": "\u2288",
+    "nsubseteqq;": "\u2ac5\u0338",
+    "nsucc;": "\u2281",
+    "nsucceq;": "\u2ab0\u0338",
+    "nsup;": "\u2285",
+    "nsupE;": "\u2ac6\u0338",
+    "nsupe;": "\u2289",
+    "nsupset;": "\u2283\u20d2",
+    "nsupseteq;": "\u2289",
+    "nsupseteqq;": "\u2ac6\u0338",
+    "ntgl;": "\u2279",
+    "ntilde": "\xf1",
+    "ntilde;": "\xf1",
+    "ntlg;": "\u2278",
+    "ntriangleleft;": "\u22ea",
+    "ntrianglelefteq;": "\u22ec",
+    "ntriangleright;": "\u22eb",
+    "ntrianglerighteq;": "\u22ed",
+    "nu;": "\u03bd",
+    "num;": "#",
+    "numero;": "\u2116",
+    "numsp;": "\u2007",
+    "nvDash;": "\u22ad",
+    "nvHarr;": "\u2904",
+    "nvap;": "\u224d\u20d2",
+    "nvdash;": "\u22ac",
+    "nvge;": "\u2265\u20d2",
+    "nvgt;": ">\u20d2",
+    "nvinfin;": "\u29de",
+    "nvlArr;": "\u2902",
+    "nvle;": "\u2264\u20d2",
+    "nvlt;": "<\u20d2",
+    "nvltrie;": "\u22b4\u20d2",
+    "nvrArr;": "\u2903",
+    "nvrtrie;": "\u22b5\u20d2",
+    "nvsim;": "\u223c\u20d2",
+    "nwArr;": "\u21d6",
+    "nwarhk;": "\u2923",
+    "nwarr;": "\u2196",
+    "nwarrow;": "\u2196",
+    "nwnear;": "\u2927",
+    "oS;": "\u24c8",
+    "oacute": "\xf3",
+    "oacute;": "\xf3",
+    "oast;": "\u229b",
+    "ocir;": "\u229a",
+    "ocirc": "\xf4",
+    "ocirc;": "\xf4",
+    "ocy;": "\u043e",
+    "odash;": "\u229d",
+    "odblac;": "\u0151",
+    "odiv;": "\u2a38",
+    "odot;": "\u2299",
+    "odsold;": "\u29bc",
+    "oelig;": "\u0153",
+    "ofcir;": "\u29bf",
+    "ofr;": "\U0001d52c",
+    "ogon;": "\u02db",
+    "ograve": "\xf2",
+    "ograve;": "\xf2",
+    "ogt;": "\u29c1",
+    "ohbar;": "\u29b5",
+    "ohm;": "\u03a9",
+    "oint;": "\u222e",
+    "olarr;": "\u21ba",
+    "olcir;": "\u29be",
+    "olcross;": "\u29bb",
+    "oline;": "\u203e",
+    "olt;": "\u29c0",
+    "omacr;": "\u014d",
+    "omega;": "\u03c9",
+    "omicron;": "\u03bf",
+    "omid;": "\u29b6",
+    "ominus;": "\u2296",
+    "oopf;": "\U0001d560",
+    "opar;": "\u29b7",
+    "operp;": "\u29b9",
+    "oplus;": "\u2295",
+    "or;": "\u2228",
+    "orarr;": "\u21bb",
+    "ord;": "\u2a5d",
+    "order;": "\u2134",
+    "orderof;": "\u2134",
+    "ordf": "\xaa",
+    "ordf;": "\xaa",
+    "ordm": "\xba",
+    "ordm;": "\xba",
+    "origof;": "\u22b6",
+    "oror;": "\u2a56",
+    "orslope;": "\u2a57",
+    "orv;": "\u2a5b",
+    "oscr;": "\u2134",
+    "oslash": "\xf8",
+    "oslash;": "\xf8",
+    "osol;": "\u2298",
+    "otilde": "\xf5",
+    "otilde;": "\xf5",
+    "otimes;": "\u2297",
+    "otimesas;": "\u2a36",
+    "ouml": "\xf6",
+    "ouml;": "\xf6",
+    "ovbar;": "\u233d",
+    "par;": "\u2225",
+    "para": "\xb6",
+    "para;": "\xb6",
+    "parallel;": "\u2225",
+    "parsim;": "\u2af3",
+    "parsl;": "\u2afd",
+    "part;": "\u2202",
+    "pcy;": "\u043f",
+    "percnt;": "%",
+    "period;": ".",
+    "permil;": "\u2030",
+    "perp;": "\u22a5",
+    "pertenk;": "\u2031",
+    "pfr;": "\U0001d52d",
+    "phi;": "\u03c6",
+    "phiv;": "\u03d5",
+    "phmmat;": "\u2133",
+    "phone;": "\u260e",
+    "pi;": "\u03c0",
+    "pitchfork;": "\u22d4",
+    "piv;": "\u03d6",
+    "planck;": "\u210f",
+    "planckh;": "\u210e",
+    "plankv;": "\u210f",
+    "plus;": "+",
+    "plusacir;": "\u2a23",
+    "plusb;": "\u229e",
+    "pluscir;": "\u2a22",
+    "plusdo;": "\u2214",
+    "plusdu;": "\u2a25",
+    "pluse;": "\u2a72",
+    "plusmn": "\xb1",
+    "plusmn;": "\xb1",
+    "plussim;": "\u2a26",
+    "plustwo;": "\u2a27",
+    "pm;": "\xb1",
+    "pointint;": "\u2a15",
+    "popf;": "\U0001d561",
+    "pound": "\xa3",
+    "pound;": "\xa3",
+    "pr;": "\u227a",
+    "prE;": "\u2ab3",
+    "prap;": "\u2ab7",
+    "prcue;": "\u227c",
+    "pre;": "\u2aaf",
+    "prec;": "\u227a",
+    "precapprox;": "\u2ab7",
+    "preccurlyeq;": "\u227c",
+    "preceq;": "\u2aaf",
+    "precnapprox;": "\u2ab9",
+    "precneqq;": "\u2ab5",
+    "precnsim;": "\u22e8",
+    "precsim;": "\u227e",
+    "prime;": "\u2032",
+    "primes;": "\u2119",
+    "prnE;": "\u2ab5",
+    "prnap;": "\u2ab9",
+    "prnsim;": "\u22e8",
+    "prod;": "\u220f",
+    "profalar;": "\u232e",
+    "profline;": "\u2312",
+    "profsurf;": "\u2313",
+    "prop;": "\u221d",
+    "propto;": "\u221d",
+    "prsim;": "\u227e",
+    "prurel;": "\u22b0",
+    "pscr;": "\U0001d4c5",
+    "psi;": "\u03c8",
+    "puncsp;": "\u2008",
+    "qfr;": "\U0001d52e",
+    "qint;": "\u2a0c",
+    "qopf;": "\U0001d562",
+    "qprime;": "\u2057",
+    "qscr;": "\U0001d4c6",
+    "quaternions;": "\u210d",
+    "quatint;": "\u2a16",
+    "quest;": "?",
+    "questeq;": "\u225f",
+    "quot": "\"",
+    "quot;": "\"",
+    "rAarr;": "\u21db",
+    "rArr;": "\u21d2",
+    "rAtail;": "\u291c",
+    "rBarr;": "\u290f",
+    "rHar;": "\u2964",
+    "race;": "\u223d\u0331",
+    "racute;": "\u0155",
+    "radic;": "\u221a",
+    "raemptyv;": "\u29b3",
+    "rang;": "\u27e9",
+    "rangd;": "\u2992",
+    "range;": "\u29a5",
+    "rangle;": "\u27e9",
+    "raquo": "\xbb",
+    "raquo;": "\xbb",
+    "rarr;": "\u2192",
+    "rarrap;": "\u2975",
+    "rarrb;": "\u21e5",
+    "rarrbfs;": "\u2920",
+    "rarrc;": "\u2933",
+    "rarrfs;": "\u291e",
+    "rarrhk;": "\u21aa",
+    "rarrlp;": "\u21ac",
+    "rarrpl;": "\u2945",
+    "rarrsim;": "\u2974",
+    "rarrtl;": "\u21a3",
+    "rarrw;": "\u219d",
+    "ratail;": "\u291a",
+    "ratio;": "\u2236",
+    "rationals;": "\u211a",
+    "rbarr;": "\u290d",
+    "rbbrk;": "\u2773",
+    "rbrace;": "}",
+    "rbrack;": "]",
+    "rbrke;": "\u298c",
+    "rbrksld;": "\u298e",
+    "rbrkslu;": "\u2990",
+    "rcaron;": "\u0159",
+    "rcedil;": "\u0157",
+    "rceil;": "\u2309",
+    "rcub;": "}",
+    "rcy;": "\u0440",
+    "rdca;": "\u2937",
+    "rdldhar;": "\u2969",
+    "rdquo;": "\u201d",
+    "rdquor;": "\u201d",
+    "rdsh;": "\u21b3",
+    "real;": "\u211c",
+    "realine;": "\u211b",
+    "realpart;": "\u211c",
+    "reals;": "\u211d",
+    "rect;": "\u25ad",
+    "reg": "\xae",
+    "reg;": "\xae",
+    "rfisht;": "\u297d",
+    "rfloor;": "\u230b",
+    "rfr;": "\U0001d52f",
+    "rhard;": "\u21c1",
+    "rharu;": "\u21c0",
+    "rharul;": "\u296c",
+    "rho;": "\u03c1",
+    "rhov;": "\u03f1",
+    "rightarrow;": "\u2192",
+    "rightarrowtail;": "\u21a3",
+    "rightharpoondown;": "\u21c1",
+    "rightharpoonup;": "\u21c0",
+    "rightleftarrows;": "\u21c4",
+    "rightleftharpoons;": "\u21cc",
+    "rightrightarrows;": "\u21c9",
+    "rightsquigarrow;": "\u219d",
+    "rightthreetimes;": "\u22cc",
+    "ring;": "\u02da",
+    "risingdotseq;": "\u2253",
+    "rlarr;": "\u21c4",
+    "rlhar;": "\u21cc",
+    "rlm;": "\u200f",
+    "rmoust;": "\u23b1",
+    "rmoustache;": "\u23b1",
+    "rnmid;": "\u2aee",
+    "roang;": "\u27ed",
+    "roarr;": "\u21fe",
+    "robrk;": "\u27e7",
+    "ropar;": "\u2986",
+    "ropf;": "\U0001d563",
+    "roplus;": "\u2a2e",
+    "rotimes;": "\u2a35",
+    "rpar;": ")",
+    "rpargt;": "\u2994",
+    "rppolint;": "\u2a12",
+    "rrarr;": "\u21c9",
+    "rsaquo;": "\u203a",
+    "rscr;": "\U0001d4c7",
+    "rsh;": "\u21b1",
+    "rsqb;": "]",
+    "rsquo;": "\u2019",
+    "rsquor;": "\u2019",
+    "rthree;": "\u22cc",
+    "rtimes;": "\u22ca",
+    "rtri;": "\u25b9",
+    "rtrie;": "\u22b5",
+    "rtrif;": "\u25b8",
+    "rtriltri;": "\u29ce",
+    "ruluhar;": "\u2968",
+    "rx;": "\u211e",
+    "sacute;": "\u015b",
+    "sbquo;": "\u201a",
+    "sc;": "\u227b",
+    "scE;": "\u2ab4",
+    "scap;": "\u2ab8",
+    "scaron;": "\u0161",
+    "sccue;": "\u227d",
+    "sce;": "\u2ab0",
+    "scedil;": "\u015f",
+    "scirc;": "\u015d",
+    "scnE;": "\u2ab6",
+    "scnap;": "\u2aba",
+    "scnsim;": "\u22e9",
+    "scpolint;": "\u2a13",
+    "scsim;": "\u227f",
+    "scy;": "\u0441",
+    "sdot;": "\u22c5",
+    "sdotb;": "\u22a1",
+    "sdote;": "\u2a66",
+    "seArr;": "\u21d8",
+    "searhk;": "\u2925",
+    "searr;": "\u2198",
+    "searrow;": "\u2198",
+    "sect": "\xa7",
+    "sect;": "\xa7",
+    "semi;": ";",
+    "seswar;": "\u2929",
+    "setminus;": "\u2216",
+    "setmn;": "\u2216",
+    "sext;": "\u2736",
+    "sfr;": "\U0001d530",
+    "sfrown;": "\u2322",
+    "sharp;": "\u266f",
+    "shchcy;": "\u0449",
+    "shcy;": "\u0448",
+    "shortmid;": "\u2223",
+    "shortparallel;": "\u2225",
+    "shy": "\xad",
+    "shy;": "\xad",
+    "sigma;": "\u03c3",
+    "sigmaf;": "\u03c2",
+    "sigmav;": "\u03c2",
+    "sim;": "\u223c",
+    "simdot;": "\u2a6a",
+    "sime;": "\u2243",
+    "simeq;": "\u2243",
+    "simg;": "\u2a9e",
+    "simgE;": "\u2aa0",
+    "siml;": "\u2a9d",
+    "simlE;": "\u2a9f",
+    "simne;": "\u2246",
+    "simplus;": "\u2a24",
+    "simrarr;": "\u2972",
+    "slarr;": "\u2190",
+    "smallsetminus;": "\u2216",
+    "smashp;": "\u2a33",
+    "smeparsl;": "\u29e4",
+    "smid;": "\u2223",
+    "smile;": "\u2323",
+    "smt;": "\u2aaa",
+    "smte;": "\u2aac",
+    "smtes;": "\u2aac\ufe00",
+    "softcy;": "\u044c",
+    "sol;": "/",
+    "solb;": "\u29c4",
+    "solbar;": "\u233f",
+    "sopf;": "\U0001d564",
+    "spades;": "\u2660",
+    "spadesuit;": "\u2660",
+    "spar;": "\u2225",
+    "sqcap;": "\u2293",
+    "sqcaps;": "\u2293\ufe00",
+    "sqcup;": "\u2294",
+    "sqcups;": "\u2294\ufe00",
+    "sqsub;": "\u228f",
+    "sqsube;": "\u2291",
+    "sqsubset;": "\u228f",
+    "sqsubseteq;": "\u2291",
+    "sqsup;": "\u2290",
+    "sqsupe;": "\u2292",
+    "sqsupset;": "\u2290",
+    "sqsupseteq;": "\u2292",
+    "squ;": "\u25a1",
+    "square;": "\u25a1",
+    "squarf;": "\u25aa",
+    "squf;": "\u25aa",
+    "srarr;": "\u2192",
+    "sscr;": "\U0001d4c8",
+    "ssetmn;": "\u2216",
+    "ssmile;": "\u2323",
+    "sstarf;": "\u22c6",
+    "star;": "\u2606",
+    "starf;": "\u2605",
+    "straightepsilon;": "\u03f5",
+    "straightphi;": "\u03d5",
+    "strns;": "\xaf",
+    "sub;": "\u2282",
+    "subE;": "\u2ac5",
+    "subdot;": "\u2abd",
+    "sube;": "\u2286",
+    "subedot;": "\u2ac3",
+    "submult;": "\u2ac1",
+    "subnE;": "\u2acb",
+    "subne;": "\u228a",
+    "subplus;": "\u2abf",
+    "subrarr;": "\u2979",
+    "subset;": "\u2282",
+    "subseteq;": "\u2286",
+    "subseteqq;": "\u2ac5",
+    "subsetneq;": "\u228a",
+    "subsetneqq;": "\u2acb",
+    "subsim;": "\u2ac7",
+    "subsub;": "\u2ad5",
+    "subsup;": "\u2ad3",
+    "succ;": "\u227b",
+    "succapprox;": "\u2ab8",
+    "succcurlyeq;": "\u227d",
+    "succeq;": "\u2ab0",
+    "succnapprox;": "\u2aba",
+    "succneqq;": "\u2ab6",
+    "succnsim;": "\u22e9",
+    "succsim;": "\u227f",
+    "sum;": "\u2211",
+    "sung;": "\u266a",
+    "sup1": "\xb9",
+    "sup1;": "\xb9",
+    "sup2": "\xb2",
+    "sup2;": "\xb2",
+    "sup3": "\xb3",
+    "sup3;": "\xb3",
+    "sup;": "\u2283",
+    "supE;": "\u2ac6",
+    "supdot;": "\u2abe",
+    "supdsub;": "\u2ad8",
+    "supe;": "\u2287",
+    "supedot;": "\u2ac4",
+    "suphsol;": "\u27c9",
+    "suphsub;": "\u2ad7",
+    "suplarr;": "\u297b",
+    "supmult;": "\u2ac2",
+    "supnE;": "\u2acc",
+    "supne;": "\u228b",
+    "supplus;": "\u2ac0",
+    "supset;": "\u2283",
+    "supseteq;": "\u2287",
+    "supseteqq;": "\u2ac6",
+    "supsetneq;": "\u228b",
+    "supsetneqq;": "\u2acc",
+    "supsim;": "\u2ac8",
+    "supsub;": "\u2ad4",
+    "supsup;": "\u2ad6",
+    "swArr;": "\u21d9",
+    "swarhk;": "\u2926",
+    "swarr;": "\u2199",
+    "swarrow;": "\u2199",
+    "swnwar;": "\u292a",
+    "szlig": "\xdf",
+    "szlig;": "\xdf",
+    "target;": "\u2316",
+    "tau;": "\u03c4",
+    "tbrk;": "\u23b4",
+    "tcaron;": "\u0165",
+    "tcedil;": "\u0163",
+    "tcy;": "\u0442",
+    "tdot;": "\u20db",
+    "telrec;": "\u2315",
+    "tfr;": "\U0001d531",
+    "there4;": "\u2234",
+    "therefore;": "\u2234",
+    "theta;": "\u03b8",
+    "thetasym;": "\u03d1",
+    "thetav;": "\u03d1",
+    "thickapprox;": "\u2248",
+    "thicksim;": "\u223c",
+    "thinsp;": "\u2009",
+    "thkap;": "\u2248",
+    "thksim;": "\u223c",
+    "thorn": "\xfe",
+    "thorn;": "\xfe",
+    "tilde;": "\u02dc",
+    "times": "\xd7",
+    "times;": "\xd7",
+    "timesb;": "\u22a0",
+    "timesbar;": "\u2a31",
+    "timesd;": "\u2a30",
+    "tint;": "\u222d",
+    "toea;": "\u2928",
+    "top;": "\u22a4",
+    "topbot;": "\u2336",
+    "topcir;": "\u2af1",
+    "topf;": "\U0001d565",
+    "topfork;": "\u2ada",
+    "tosa;": "\u2929",
+    "tprime;": "\u2034",
+    "trade;": "\u2122",
+    "triangle;": "\u25b5",
+    "triangledown;": "\u25bf",
+    "triangleleft;": "\u25c3",
+    "trianglelefteq;": "\u22b4",
+    "triangleq;": "\u225c",
+    "triangleright;": "\u25b9",
+    "trianglerighteq;": "\u22b5",
+    "tridot;": "\u25ec",
+    "trie;": "\u225c",
+    "triminus;": "\u2a3a",
+    "triplus;": "\u2a39",
+    "trisb;": "\u29cd",
+    "tritime;": "\u2a3b",
+    "trpezium;": "\u23e2",
+    "tscr;": "\U0001d4c9",
+    "tscy;": "\u0446",
+    "tshcy;": "\u045b",
+    "tstrok;": "\u0167",
+    "twixt;": "\u226c",
+    "twoheadleftarrow;": "\u219e",
+    "twoheadrightarrow;": "\u21a0",
+    "uArr;": "\u21d1",
+    "uHar;": "\u2963",
+    "uacute": "\xfa",
+    "uacute;": "\xfa",
+    "uarr;": "\u2191",
+    "ubrcy;": "\u045e",
+    "ubreve;": "\u016d",
+    "ucirc": "\xfb",
+    "ucirc;": "\xfb",
+    "ucy;": "\u0443",
+    "udarr;": "\u21c5",
+    "udblac;": "\u0171",
+    "udhar;": "\u296e",
+    "ufisht;": "\u297e",
+    "ufr;": "\U0001d532",
+    "ugrave": "\xf9",
+    "ugrave;": "\xf9",
+    "uharl;": "\u21bf",
+    "uharr;": "\u21be",
+    "uhblk;": "\u2580",
+    "ulcorn;": "\u231c",
+    "ulcorner;": "\u231c",
+    "ulcrop;": "\u230f",
+    "ultri;": "\u25f8",
+    "umacr;": "\u016b",
+    "uml": "\xa8",
+    "uml;": "\xa8",
+    "uogon;": "\u0173",
+    "uopf;": "\U0001d566",
+    "uparrow;": "\u2191",
+    "updownarrow;": "\u2195",
+    "upharpoonleft;": "\u21bf",
+    "upharpoonright;": "\u21be",
+    "uplus;": "\u228e",
+    "upsi;": "\u03c5",
+    "upsih;": "\u03d2",
+    "upsilon;": "\u03c5",
+    "upuparrows;": "\u21c8",
+    "urcorn;": "\u231d",
+    "urcorner;": "\u231d",
+    "urcrop;": "\u230e",
+    "uring;": "\u016f",
+    "urtri;": "\u25f9",
+    "uscr;": "\U0001d4ca",
+    "utdot;": "\u22f0",
+    "utilde;": "\u0169",
+    "utri;": "\u25b5",
+    "utrif;": "\u25b4",
+    "uuarr;": "\u21c8",
+    "uuml": "\xfc",
+    "uuml;": "\xfc",
+    "uwangle;": "\u29a7",
+    "vArr;": "\u21d5",
+    "vBar;": "\u2ae8",
+    "vBarv;": "\u2ae9",
+    "vDash;": "\u22a8",
+    "vangrt;": "\u299c",
+    "varepsilon;": "\u03f5",
+    "varkappa;": "\u03f0",
+    "varnothing;": "\u2205",
+    "varphi;": "\u03d5",
+    "varpi;": "\u03d6",
+    "varpropto;": "\u221d",
+    "varr;": "\u2195",
+    "varrho;": "\u03f1",
+    "varsigma;": "\u03c2",
+    "varsubsetneq;": "\u228a\ufe00",
+    "varsubsetneqq;": "\u2acb\ufe00",
+    "varsupsetneq;": "\u228b\ufe00",
+    "varsupsetneqq;": "\u2acc\ufe00",
+    "vartheta;": "\u03d1",
+    "vartriangleleft;": "\u22b2",
+    "vartriangleright;": "\u22b3",
+    "vcy;": "\u0432",
+    "vdash;": "\u22a2",
+    "vee;": "\u2228",
+    "veebar;": "\u22bb",
+    "veeeq;": "\u225a",
+    "vellip;": "\u22ee",
+    "verbar;": "|",
+    "vert;": "|",
+    "vfr;": "\U0001d533",
+    "vltri;": "\u22b2",
+    "vnsub;": "\u2282\u20d2",
+    "vnsup;": "\u2283\u20d2",
+    "vopf;": "\U0001d567",
+    "vprop;": "\u221d",
+    "vrtri;": "\u22b3",
+    "vscr;": "\U0001d4cb",
+    "vsubnE;": "\u2acb\ufe00",
+    "vsubne;": "\u228a\ufe00",
+    "vsupnE;": "\u2acc\ufe00",
+    "vsupne;": "\u228b\ufe00",
+    "vzigzag;": "\u299a",
+    "wcirc;": "\u0175",
+    "wedbar;": "\u2a5f",
+    "wedge;": "\u2227",
+    "wedgeq;": "\u2259",
+    "weierp;": "\u2118",
+    "wfr;": "\U0001d534",
+    "wopf;": "\U0001d568",
+    "wp;": "\u2118",
+    "wr;": "\u2240",
+    "wreath;": "\u2240",
+    "wscr;": "\U0001d4cc",
+    "xcap;": "\u22c2",
+    "xcirc;": "\u25ef",
+    "xcup;": "\u22c3",
+    "xdtri;": "\u25bd",
+    "xfr;": "\U0001d535",
+    "xhArr;": "\u27fa",
+    "xharr;": "\u27f7",
+    "xi;": "\u03be",
+    "xlArr;": "\u27f8",
+    "xlarr;": "\u27f5",
+    "xmap;": "\u27fc",
+    "xnis;": "\u22fb",
+    "xodot;": "\u2a00",
+    "xopf;": "\U0001d569",
+    "xoplus;": "\u2a01",
+    "xotime;": "\u2a02",
+    "xrArr;": "\u27f9",
+    "xrarr;": "\u27f6",
+    "xscr;": "\U0001d4cd",
+    "xsqcup;": "\u2a06",
+    "xuplus;": "\u2a04",
+    "xutri;": "\u25b3",
+    "xvee;": "\u22c1",
+    "xwedge;": "\u22c0",
+    "yacute": "\xfd",
+    "yacute;": "\xfd",
+    "yacy;": "\u044f",
+    "ycirc;": "\u0177",
+    "ycy;": "\u044b",
+    "yen": "\xa5",
+    "yen;": "\xa5",
+    "yfr;": "\U0001d536",
+    "yicy;": "\u0457",
+    "yopf;": "\U0001d56a",
+    "yscr;": "\U0001d4ce",
+    "yucy;": "\u044e",
+    "yuml": "\xff",
+    "yuml;": "\xff",
+    "zacute;": "\u017a",
+    "zcaron;": "\u017e",
+    "zcy;": "\u0437",
+    "zdot;": "\u017c",
+    "zeetrf;": "\u2128",
+    "zeta;": "\u03b6",
+    "zfr;": "\U0001d537",
+    "zhcy;": "\u0436",
+    "zigrarr;": "\u21dd",
+    "zopf;": "\U0001d56b",
+    "zscr;": "\U0001d4cf",
+    "zwj;": "\u200d",
+    "zwnj;": "\u200c",
+}
+
+replacementCharacters = {
+    0x0: "\uFFFD",
+    0x0d: "\u000D",
+    0x80: "\u20AC",
+    0x81: "\u0081",
+    0x82: "\u201A",
+    0x83: "\u0192",
+    0x84: "\u201E",
+    0x85: "\u2026",
+    0x86: "\u2020",
+    0x87: "\u2021",
+    0x88: "\u02C6",
+    0x89: "\u2030",
+    0x8A: "\u0160",
+    0x8B: "\u2039",
+    0x8C: "\u0152",
+    0x8D: "\u008D",
+    0x8E: "\u017D",
+    0x8F: "\u008F",
+    0x90: "\u0090",
+    0x91: "\u2018",
+    0x92: "\u2019",
+    0x93: "\u201C",
+    0x94: "\u201D",
+    0x95: "\u2022",
+    0x96: "\u2013",
+    0x97: "\u2014",
+    0x98: "\u02DC",
+    0x99: "\u2122",
+    0x9A: "\u0161",
+    0x9B: "\u203A",
+    0x9C: "\u0153",
+    0x9D: "\u009D",
+    0x9E: "\u017E",
+    0x9F: "\u0178",
+}
+
+tokenTypes = {
+    "Doctype": 0,
+    "Characters": 1,
+    "SpaceCharacters": 2,
+    "StartTag": 3,
+    "EndTag": 4,
+    "EmptyTag": 5,
+    "Comment": 6,
+    "ParseError": 7
+}
+
+tagTokenTypes = frozenset([tokenTypes["StartTag"], tokenTypes["EndTag"],
+                           tokenTypes["EmptyTag"]])
+
+
+prefixes = dict([(v, k) for k, v in namespaces.items()])
+prefixes["http://www.w3.org/1998/Math/MathML"] = "math"
+
+
+class DataLossWarning(UserWarning):
+    """Raised when the current tree is unable to represent the input data"""
+    pass
+
+
+class _ReparseException(Exception):
+    pass
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/__init__.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/alphabeticalattributes.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/alphabeticalattributes.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/lint.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/lint.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/optionaltags.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/optionaltags.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/sanitizer.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/sanitizer.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/sanitizer.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/whitespace.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/whitespace.cpython-37.pyc
new file mode 100644
index 00000000..86dc6bd7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/__pycache__/whitespace.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py
new file mode 100644
index 00000000..5ba926e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py
@@ -0,0 +1,29 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+from collections import OrderedDict
+
+
+def _attr_key(attr):
+    """Return an appropriate key for an attribute for sorting
+
+    Attributes have a namespace that can be either ``None`` or a string. We
+    can't compare the two because they're different types, so we convert
+    ``None`` to an empty string first.
+
+    """
+    return (attr[0][0] or ''), attr[0][1]
+
+
+class Filter(base.Filter):
+    """Alphabetizes attributes for elements"""
+    def __iter__(self):
+        for token in base.Filter.__iter__(self):
+            if token["type"] in ("StartTag", "EmptyTag"):
+                attrs = OrderedDict()
+                for name, value in sorted(token["data"].items(),
+                                          key=_attr_key):
+                    attrs[name] = value
+                token["data"] = attrs
+            yield token
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/base.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/base.py
new file mode 100644
index 00000000..c7dbaed0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/base.py
@@ -0,0 +1,12 @@
+from __future__ import absolute_import, division, unicode_literals
+
+
+class Filter(object):
+    def __init__(self, source):
+        self.source = source
+
+    def __iter__(self):
+        return iter(self.source)
+
+    def __getattr__(self, name):
+        return getattr(self.source, name)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py
new file mode 100644
index 00000000..aefb5c84
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py
@@ -0,0 +1,73 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+
+class Filter(base.Filter):
+    """Injects ``<meta charset=ENCODING>`` tag into head of document"""
+    def __init__(self, source, encoding):
+        """Creates a Filter
+
+        :arg source: the source token stream
+
+        :arg encoding: the encoding to set
+
+        """
+        base.Filter.__init__(self, source)
+        self.encoding = encoding
+
+    def __iter__(self):
+        state = "pre_head"
+        meta_found = (self.encoding is None)
+        pending = []
+
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type == "StartTag":
+                if token["name"].lower() == "head":
+                    state = "in_head"
+
+            elif type == "EmptyTag":
+                if token["name"].lower() == "meta":
+                    # replace charset with actual encoding
+                    has_http_equiv_content_type = False
+                    for (namespace, name), value in token["data"].items():
+                        if namespace is not None:
+                            continue
+                        elif name.lower() == 'charset':
+                            token["data"][(namespace, name)] = self.encoding
+                            meta_found = True
+                            break
+                        elif name == 'http-equiv' and value.lower() == 'content-type':
+                            has_http_equiv_content_type = True
+                    else:
+                        if has_http_equiv_content_type and (None, "content") in token["data"]:
+                            token["data"][(None, "content")] = 'text/html; charset=%s' % self.encoding
+                            meta_found = True
+
+                elif token["name"].lower() == "head" and not meta_found:
+                    # insert meta into empty head
+                    yield {"type": "StartTag", "name": "head",
+                           "data": token["data"]}
+                    yield {"type": "EmptyTag", "name": "meta",
+                           "data": {(None, "charset"): self.encoding}}
+                    yield {"type": "EndTag", "name": "head"}
+                    meta_found = True
+                    continue
+
+            elif type == "EndTag":
+                if token["name"].lower() == "head" and pending:
+                    # insert meta into head (if necessary) and flush pending queue
+                    yield pending.pop(0)
+                    if not meta_found:
+                        yield {"type": "EmptyTag", "name": "meta",
+                               "data": {(None, "charset"): self.encoding}}
+                    while pending:
+                        yield pending.pop(0)
+                    meta_found = True
+                    state = "post_head"
+
+            if state == "in_head":
+                pending.append(token)
+            else:
+                yield token
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/lint.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/lint.py
new file mode 100644
index 00000000..fcc07eec
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/lint.py
@@ -0,0 +1,93 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import text_type
+
+from . import base
+from ..constants import namespaces, voidElements
+
+from ..constants import spaceCharacters
+spaceCharacters = "".join(spaceCharacters)
+
+
+class Filter(base.Filter):
+    """Lints the token stream for errors
+
+    If it finds any errors, it'll raise an ``AssertionError``.
+
+    """
+    def __init__(self, source, require_matching_tags=True):
+        """Creates a Filter
+
+        :arg source: the source token stream
+
+        :arg require_matching_tags: whether or not to require matching tags
+
+        """
+        super(Filter, self).__init__(source)
+        self.require_matching_tags = require_matching_tags
+
+    def __iter__(self):
+        open_elements = []
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type in ("StartTag", "EmptyTag"):
+                namespace = token["namespace"]
+                name = token["name"]
+                assert namespace is None or isinstance(namespace, text_type)
+                assert namespace != ""
+                assert isinstance(name, text_type)
+                assert name != ""
+                assert isinstance(token["data"], dict)
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    assert type == "EmptyTag"
+                else:
+                    assert type == "StartTag"
+                if type == "StartTag" and self.require_matching_tags:
+                    open_elements.append((namespace, name))
+                for (namespace, name), value in token["data"].items():
+                    assert namespace is None or isinstance(namespace, text_type)
+                    assert namespace != ""
+                    assert isinstance(name, text_type)
+                    assert name != ""
+                    assert isinstance(value, text_type)
+
+            elif type == "EndTag":
+                namespace = token["namespace"]
+                name = token["name"]
+                assert namespace is None or isinstance(namespace, text_type)
+                assert namespace != ""
+                assert isinstance(name, text_type)
+                assert name != ""
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    assert False, "Void element reported as EndTag token: %(tag)s" % {"tag": name}
+                elif self.require_matching_tags:
+                    start = open_elements.pop()
+                    assert start == (namespace, name)
+
+            elif type == "Comment":
+                data = token["data"]
+                assert isinstance(data, text_type)
+
+            elif type in ("Characters", "SpaceCharacters"):
+                data = token["data"]
+                assert isinstance(data, text_type)
+                assert data != ""
+                if type == "SpaceCharacters":
+                    assert data.strip(spaceCharacters) == ""
+
+            elif type == "Doctype":
+                name = token["name"]
+                assert name is None or isinstance(name, text_type)
+                assert token["publicId"] is None or isinstance(name, text_type)
+                assert token["systemId"] is None or isinstance(name, text_type)
+
+            elif type == "Entity":
+                assert isinstance(token["name"], text_type)
+
+            elif type == "SerializerError":
+                assert isinstance(token["data"], text_type)
+
+            else:
+                assert False, "Unknown token type: %(type)s" % {"type": type}
+
+            yield token
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/optionaltags.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/optionaltags.py
new file mode 100644
index 00000000..4a865012
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/optionaltags.py
@@ -0,0 +1,207 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+
+class Filter(base.Filter):
+    """Removes optional tags from the token stream"""
+    def slider(self):
+        previous1 = previous2 = None
+        for token in self.source:
+            if previous1 is not None:
+                yield previous2, previous1, token
+            previous2 = previous1
+            previous1 = token
+        if previous1 is not None:
+            yield previous2, previous1, None
+
+    def __iter__(self):
+        for previous, token, next in self.slider():
+            type = token["type"]
+            if type == "StartTag":
+                if (token["data"] or
+                        not self.is_optional_start(token["name"], previous, next)):
+                    yield token
+            elif type == "EndTag":
+                if not self.is_optional_end(token["name"], next):
+                    yield token
+            else:
+                yield token
+
+    def is_optional_start(self, tagname, previous, next):
+        type = next and next["type"] or None
+        if tagname in 'html':
+            # An html element's start tag may be omitted if the first thing
+            # inside the html element is not a space character or a comment.
+            return type not in ("Comment", "SpaceCharacters")
+        elif tagname == 'head':
+            # A head element's start tag may be omitted if the first thing
+            # inside the head element is an element.
+            # XXX: we also omit the start tag if the head element is empty
+            if type in ("StartTag", "EmptyTag"):
+                return True
+            elif type == "EndTag":
+                return next["name"] == "head"
+        elif tagname == 'body':
+            # A body element's start tag may be omitted if the first thing
+            # inside the body element is not a space character or a comment,
+            # except if the first thing inside the body element is a script
+            # or style element and the node immediately preceding the body
+            # element is a head element whose end tag has been omitted.
+            if type in ("Comment", "SpaceCharacters"):
+                return False
+            elif type == "StartTag":
+                # XXX: we do not look at the preceding event, so we never omit
+                # the body element's start tag if it's followed by a script or
+                # a style element.
+                return next["name"] not in ('script', 'style')
+            else:
+                return True
+        elif tagname == 'colgroup':
+            # A colgroup element's start tag may be omitted if the first thing
+            # inside the colgroup element is a col element, and if the element
+            # is not immediately preceded by another colgroup element whose
+            # end tag has been omitted.
+            if type in ("StartTag", "EmptyTag"):
+                # XXX: we do not look at the preceding event, so instead we never
+                # omit the colgroup element's end tag when it is immediately
+                # followed by another colgroup element. See is_optional_end.
+                return next["name"] == "col"
+            else:
+                return False
+        elif tagname == 'tbody':
+            # A tbody element's start tag may be omitted if the first thing
+            # inside the tbody element is a tr element, and if the element is
+            # not immediately preceded by a tbody, thead, or tfoot element
+            # whose end tag has been omitted.
+            if type == "StartTag":
+                # omit the thead and tfoot elements' end tag when they are
+                # immediately followed by a tbody element. See is_optional_end.
+                if previous and previous['type'] == 'EndTag' and \
+                        previous['name'] in ('tbody', 'thead', 'tfoot'):
+                    return False
+                return next["name"] == 'tr'
+            else:
+                return False
+        return False
+
+    def is_optional_end(self, tagname, next):
+        type = next and next["type"] or None
+        if tagname in ('html', 'head', 'body'):
+            # An html element's end tag may be omitted if the html element
+            # is not immediately followed by a space character or a comment.
+            return type not in ("Comment", "SpaceCharacters")
+        elif tagname in ('li', 'optgroup', 'tr'):
+            # A li element's end tag may be omitted if the li element is
+            # immediately followed by another li element or if there is
+            # no more content in the parent element.
+            # An optgroup element's end tag may be omitted if the optgroup
+            # element is immediately followed by another optgroup element,
+            # or if there is no more content in the parent element.
+            # A tr element's end tag may be omitted if the tr element is
+            # immediately followed by another tr element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] == tagname
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('dt', 'dd'):
+            # A dt element's end tag may be omitted if the dt element is
+            # immediately followed by another dt element or a dd element.
+            # A dd element's end tag may be omitted if the dd element is
+            # immediately followed by another dd element or a dt element,
+            # or if there is no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('dt', 'dd')
+            elif tagname == 'dd':
+                return type == "EndTag" or type is None
+            else:
+                return False
+        elif tagname == 'p':
+            # A p element's end tag may be omitted if the p element is
+            # immediately followed by an address, article, aside,
+            # blockquote, datagrid, dialog, dir, div, dl, fieldset,
+            # footer, form, h1, h2, h3, h4, h5, h6, header, hr, menu,
+            # nav, ol, p, pre, section, table, or ul, element, or if
+            # there is no more content in the parent element.
+            if type in ("StartTag", "EmptyTag"):
+                return next["name"] in ('address', 'article', 'aside',
+                                        'blockquote', 'datagrid', 'dialog',
+                                        'dir', 'div', 'dl', 'fieldset', 'footer',
+                                        'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
+                                        'header', 'hr', 'menu', 'nav', 'ol',
+                                        'p', 'pre', 'section', 'table', 'ul')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname == 'option':
+            # An option element's end tag may be omitted if the option
+            # element is immediately followed by another option element,
+            # or if it is immediately followed by an <code>optgroup</code>
+            # element, or if there is no more content in the parent
+            # element.
+            if type == "StartTag":
+                return next["name"] in ('option', 'optgroup')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('rt', 'rp'):
+            # An rt element's end tag may be omitted if the rt element is
+            # immediately followed by an rt or rp element, or if there is
+            # no more content in the parent element.
+            # An rp element's end tag may be omitted if the rp element is
+            # immediately followed by an rt or rp element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('rt', 'rp')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname == 'colgroup':
+            # A colgroup element's end tag may be omitted if the colgroup
+            # element is not immediately followed by a space character or
+            # a comment.
+            if type in ("Comment", "SpaceCharacters"):
+                return False
+            elif type == "StartTag":
+                # XXX: we also look for an immediately following colgroup
+                # element. See is_optional_start.
+                return next["name"] != 'colgroup'
+            else:
+                return True
+        elif tagname in ('thead', 'tbody'):
+            # A thead element's end tag may be omitted if the thead element
+            # is immediately followed by a tbody or tfoot element.
+            # A tbody element's end tag may be omitted if the tbody element
+            # is immediately followed by a tbody or tfoot element, or if
+            # there is no more content in the parent element.
+            # A tfoot element's end tag may be omitted if the tfoot element
+            # is immediately followed by a tbody element, or if there is no
+            # more content in the parent element.
+            # XXX: we never omit the end tag when the following element is
+            # a tbody. See is_optional_start.
+            if type == "StartTag":
+                return next["name"] in ['tbody', 'tfoot']
+            elif tagname == 'tbody':
+                return type == "EndTag" or type is None
+            else:
+                return False
+        elif tagname == 'tfoot':
+            # A tfoot element's end tag may be omitted if the tfoot element
+            # is immediately followed by a tbody element, or if there is no
+            # more content in the parent element.
+            # XXX: we never omit the end tag when the following element is
+            # a tbody. See is_optional_start.
+            if type == "StartTag":
+                return next["name"] == 'tbody'
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('td', 'th'):
+            # A td element's end tag may be omitted if the td element is
+            # immediately followed by a td or th element, or if there is
+            # no more content in the parent element.
+            # A th element's end tag may be omitted if the th element is
+            # immediately followed by a td or th element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('td', 'th')
+            else:
+                return type == "EndTag" or type is None
+        return False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/sanitizer.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/sanitizer.py
new file mode 100644
index 00000000..af8e77b8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/sanitizer.py
@@ -0,0 +1,896 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+from xml.sax.saxutils import escape, unescape
+
+from pip._vendor.six.moves import urllib_parse as urlparse
+
+from . import base
+from ..constants import namespaces, prefixes
+
+__all__ = ["Filter"]
+
+
+allowed_elements = frozenset((
+    (namespaces['html'], 'a'),
+    (namespaces['html'], 'abbr'),
+    (namespaces['html'], 'acronym'),
+    (namespaces['html'], 'address'),
+    (namespaces['html'], 'area'),
+    (namespaces['html'], 'article'),
+    (namespaces['html'], 'aside'),
+    (namespaces['html'], 'audio'),
+    (namespaces['html'], 'b'),
+    (namespaces['html'], 'big'),
+    (namespaces['html'], 'blockquote'),
+    (namespaces['html'], 'br'),
+    (namespaces['html'], 'button'),
+    (namespaces['html'], 'canvas'),
+    (namespaces['html'], 'caption'),
+    (namespaces['html'], 'center'),
+    (namespaces['html'], 'cite'),
+    (namespaces['html'], 'code'),
+    (namespaces['html'], 'col'),
+    (namespaces['html'], 'colgroup'),
+    (namespaces['html'], 'command'),
+    (namespaces['html'], 'datagrid'),
+    (namespaces['html'], 'datalist'),
+    (namespaces['html'], 'dd'),
+    (namespaces['html'], 'del'),
+    (namespaces['html'], 'details'),
+    (namespaces['html'], 'dfn'),
+    (namespaces['html'], 'dialog'),
+    (namespaces['html'], 'dir'),
+    (namespaces['html'], 'div'),
+    (namespaces['html'], 'dl'),
+    (namespaces['html'], 'dt'),
+    (namespaces['html'], 'em'),
+    (namespaces['html'], 'event-source'),
+    (namespaces['html'], 'fieldset'),
+    (namespaces['html'], 'figcaption'),
+    (namespaces['html'], 'figure'),
+    (namespaces['html'], 'footer'),
+    (namespaces['html'], 'font'),
+    (namespaces['html'], 'form'),
+    (namespaces['html'], 'header'),
+    (namespaces['html'], 'h1'),
+    (namespaces['html'], 'h2'),
+    (namespaces['html'], 'h3'),
+    (namespaces['html'], 'h4'),
+    (namespaces['html'], 'h5'),
+    (namespaces['html'], 'h6'),
+    (namespaces['html'], 'hr'),
+    (namespaces['html'], 'i'),
+    (namespaces['html'], 'img'),
+    (namespaces['html'], 'input'),
+    (namespaces['html'], 'ins'),
+    (namespaces['html'], 'keygen'),
+    (namespaces['html'], 'kbd'),
+    (namespaces['html'], 'label'),
+    (namespaces['html'], 'legend'),
+    (namespaces['html'], 'li'),
+    (namespaces['html'], 'm'),
+    (namespaces['html'], 'map'),
+    (namespaces['html'], 'menu'),
+    (namespaces['html'], 'meter'),
+    (namespaces['html'], 'multicol'),
+    (namespaces['html'], 'nav'),
+    (namespaces['html'], 'nextid'),
+    (namespaces['html'], 'ol'),
+    (namespaces['html'], 'output'),
+    (namespaces['html'], 'optgroup'),
+    (namespaces['html'], 'option'),
+    (namespaces['html'], 'p'),
+    (namespaces['html'], 'pre'),
+    (namespaces['html'], 'progress'),
+    (namespaces['html'], 'q'),
+    (namespaces['html'], 's'),
+    (namespaces['html'], 'samp'),
+    (namespaces['html'], 'section'),
+    (namespaces['html'], 'select'),
+    (namespaces['html'], 'small'),
+    (namespaces['html'], 'sound'),
+    (namespaces['html'], 'source'),
+    (namespaces['html'], 'spacer'),
+    (namespaces['html'], 'span'),
+    (namespaces['html'], 'strike'),
+    (namespaces['html'], 'strong'),
+    (namespaces['html'], 'sub'),
+    (namespaces['html'], 'sup'),
+    (namespaces['html'], 'table'),
+    (namespaces['html'], 'tbody'),
+    (namespaces['html'], 'td'),
+    (namespaces['html'], 'textarea'),
+    (namespaces['html'], 'time'),
+    (namespaces['html'], 'tfoot'),
+    (namespaces['html'], 'th'),
+    (namespaces['html'], 'thead'),
+    (namespaces['html'], 'tr'),
+    (namespaces['html'], 'tt'),
+    (namespaces['html'], 'u'),
+    (namespaces['html'], 'ul'),
+    (namespaces['html'], 'var'),
+    (namespaces['html'], 'video'),
+    (namespaces['mathml'], 'maction'),
+    (namespaces['mathml'], 'math'),
+    (namespaces['mathml'], 'merror'),
+    (namespaces['mathml'], 'mfrac'),
+    (namespaces['mathml'], 'mi'),
+    (namespaces['mathml'], 'mmultiscripts'),
+    (namespaces['mathml'], 'mn'),
+    (namespaces['mathml'], 'mo'),
+    (namespaces['mathml'], 'mover'),
+    (namespaces['mathml'], 'mpadded'),
+    (namespaces['mathml'], 'mphantom'),
+    (namespaces['mathml'], 'mprescripts'),
+    (namespaces['mathml'], 'mroot'),
+    (namespaces['mathml'], 'mrow'),
+    (namespaces['mathml'], 'mspace'),
+    (namespaces['mathml'], 'msqrt'),
+    (namespaces['mathml'], 'mstyle'),
+    (namespaces['mathml'], 'msub'),
+    (namespaces['mathml'], 'msubsup'),
+    (namespaces['mathml'], 'msup'),
+    (namespaces['mathml'], 'mtable'),
+    (namespaces['mathml'], 'mtd'),
+    (namespaces['mathml'], 'mtext'),
+    (namespaces['mathml'], 'mtr'),
+    (namespaces['mathml'], 'munder'),
+    (namespaces['mathml'], 'munderover'),
+    (namespaces['mathml'], 'none'),
+    (namespaces['svg'], 'a'),
+    (namespaces['svg'], 'animate'),
+    (namespaces['svg'], 'animateColor'),
+    (namespaces['svg'], 'animateMotion'),
+    (namespaces['svg'], 'animateTransform'),
+    (namespaces['svg'], 'clipPath'),
+    (namespaces['svg'], 'circle'),
+    (namespaces['svg'], 'defs'),
+    (namespaces['svg'], 'desc'),
+    (namespaces['svg'], 'ellipse'),
+    (namespaces['svg'], 'font-face'),
+    (namespaces['svg'], 'font-face-name'),
+    (namespaces['svg'], 'font-face-src'),
+    (namespaces['svg'], 'g'),
+    (namespaces['svg'], 'glyph'),
+    (namespaces['svg'], 'hkern'),
+    (namespaces['svg'], 'linearGradient'),
+    (namespaces['svg'], 'line'),
+    (namespaces['svg'], 'marker'),
+    (namespaces['svg'], 'metadata'),
+    (namespaces['svg'], 'missing-glyph'),
+    (namespaces['svg'], 'mpath'),
+    (namespaces['svg'], 'path'),
+    (namespaces['svg'], 'polygon'),
+    (namespaces['svg'], 'polyline'),
+    (namespaces['svg'], 'radialGradient'),
+    (namespaces['svg'], 'rect'),
+    (namespaces['svg'], 'set'),
+    (namespaces['svg'], 'stop'),
+    (namespaces['svg'], 'svg'),
+    (namespaces['svg'], 'switch'),
+    (namespaces['svg'], 'text'),
+    (namespaces['svg'], 'title'),
+    (namespaces['svg'], 'tspan'),
+    (namespaces['svg'], 'use'),
+))
+
+allowed_attributes = frozenset((
+    # HTML attributes
+    (None, 'abbr'),
+    (None, 'accept'),
+    (None, 'accept-charset'),
+    (None, 'accesskey'),
+    (None, 'action'),
+    (None, 'align'),
+    (None, 'alt'),
+    (None, 'autocomplete'),
+    (None, 'autofocus'),
+    (None, 'axis'),
+    (None, 'background'),
+    (None, 'balance'),
+    (None, 'bgcolor'),
+    (None, 'bgproperties'),
+    (None, 'border'),
+    (None, 'bordercolor'),
+    (None, 'bordercolordark'),
+    (None, 'bordercolorlight'),
+    (None, 'bottompadding'),
+    (None, 'cellpadding'),
+    (None, 'cellspacing'),
+    (None, 'ch'),
+    (None, 'challenge'),
+    (None, 'char'),
+    (None, 'charoff'),
+    (None, 'choff'),
+    (None, 'charset'),
+    (None, 'checked'),
+    (None, 'cite'),
+    (None, 'class'),
+    (None, 'clear'),
+    (None, 'color'),
+    (None, 'cols'),
+    (None, 'colspan'),
+    (None, 'compact'),
+    (None, 'contenteditable'),
+    (None, 'controls'),
+    (None, 'coords'),
+    (None, 'data'),
+    (None, 'datafld'),
+    (None, 'datapagesize'),
+    (None, 'datasrc'),
+    (None, 'datetime'),
+    (None, 'default'),
+    (None, 'delay'),
+    (None, 'dir'),
+    (None, 'disabled'),
+    (None, 'draggable'),
+    (None, 'dynsrc'),
+    (None, 'enctype'),
+    (None, 'end'),
+    (None, 'face'),
+    (None, 'for'),
+    (None, 'form'),
+    (None, 'frame'),
+    (None, 'galleryimg'),
+    (None, 'gutter'),
+    (None, 'headers'),
+    (None, 'height'),
+    (None, 'hidefocus'),
+    (None, 'hidden'),
+    (None, 'high'),
+    (None, 'href'),
+    (None, 'hreflang'),
+    (None, 'hspace'),
+    (None, 'icon'),
+    (None, 'id'),
+    (None, 'inputmode'),
+    (None, 'ismap'),
+    (None, 'keytype'),
+    (None, 'label'),
+    (None, 'leftspacing'),
+    (None, 'lang'),
+    (None, 'list'),
+    (None, 'longdesc'),
+    (None, 'loop'),
+    (None, 'loopcount'),
+    (None, 'loopend'),
+    (None, 'loopstart'),
+    (None, 'low'),
+    (None, 'lowsrc'),
+    (None, 'max'),
+    (None, 'maxlength'),
+    (None, 'media'),
+    (None, 'method'),
+    (None, 'min'),
+    (None, 'multiple'),
+    (None, 'name'),
+    (None, 'nohref'),
+    (None, 'noshade'),
+    (None, 'nowrap'),
+    (None, 'open'),
+    (None, 'optimum'),
+    (None, 'pattern'),
+    (None, 'ping'),
+    (None, 'point-size'),
+    (None, 'poster'),
+    (None, 'pqg'),
+    (None, 'preload'),
+    (None, 'prompt'),
+    (None, 'radiogroup'),
+    (None, 'readonly'),
+    (None, 'rel'),
+    (None, 'repeat-max'),
+    (None, 'repeat-min'),
+    (None, 'replace'),
+    (None, 'required'),
+    (None, 'rev'),
+    (None, 'rightspacing'),
+    (None, 'rows'),
+    (None, 'rowspan'),
+    (None, 'rules'),
+    (None, 'scope'),
+    (None, 'selected'),
+    (None, 'shape'),
+    (None, 'size'),
+    (None, 'span'),
+    (None, 'src'),
+    (None, 'start'),
+    (None, 'step'),
+    (None, 'style'),
+    (None, 'summary'),
+    (None, 'suppress'),
+    (None, 'tabindex'),
+    (None, 'target'),
+    (None, 'template'),
+    (None, 'title'),
+    (None, 'toppadding'),
+    (None, 'type'),
+    (None, 'unselectable'),
+    (None, 'usemap'),
+    (None, 'urn'),
+    (None, 'valign'),
+    (None, 'value'),
+    (None, 'variable'),
+    (None, 'volume'),
+    (None, 'vspace'),
+    (None, 'vrml'),
+    (None, 'width'),
+    (None, 'wrap'),
+    (namespaces['xml'], 'lang'),
+    # MathML attributes
+    (None, 'actiontype'),
+    (None, 'align'),
+    (None, 'columnalign'),
+    (None, 'columnalign'),
+    (None, 'columnalign'),
+    (None, 'columnlines'),
+    (None, 'columnspacing'),
+    (None, 'columnspan'),
+    (None, 'depth'),
+    (None, 'display'),
+    (None, 'displaystyle'),
+    (None, 'equalcolumns'),
+    (None, 'equalrows'),
+    (None, 'fence'),
+    (None, 'fontstyle'),
+    (None, 'fontweight'),
+    (None, 'frame'),
+    (None, 'height'),
+    (None, 'linethickness'),
+    (None, 'lspace'),
+    (None, 'mathbackground'),
+    (None, 'mathcolor'),
+    (None, 'mathvariant'),
+    (None, 'mathvariant'),
+    (None, 'maxsize'),
+    (None, 'minsize'),
+    (None, 'other'),
+    (None, 'rowalign'),
+    (None, 'rowalign'),
+    (None, 'rowalign'),
+    (None, 'rowlines'),
+    (None, 'rowspacing'),
+    (None, 'rowspan'),
+    (None, 'rspace'),
+    (None, 'scriptlevel'),
+    (None, 'selection'),
+    (None, 'separator'),
+    (None, 'stretchy'),
+    (None, 'width'),
+    (None, 'width'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xlink'], 'show'),
+    (namespaces['xlink'], 'type'),
+    # SVG attributes
+    (None, 'accent-height'),
+    (None, 'accumulate'),
+    (None, 'additive'),
+    (None, 'alphabetic'),
+    (None, 'arabic-form'),
+    (None, 'ascent'),
+    (None, 'attributeName'),
+    (None, 'attributeType'),
+    (None, 'baseProfile'),
+    (None, 'bbox'),
+    (None, 'begin'),
+    (None, 'by'),
+    (None, 'calcMode'),
+    (None, 'cap-height'),
+    (None, 'class'),
+    (None, 'clip-path'),
+    (None, 'color'),
+    (None, 'color-rendering'),
+    (None, 'content'),
+    (None, 'cx'),
+    (None, 'cy'),
+    (None, 'd'),
+    (None, 'dx'),
+    (None, 'dy'),
+    (None, 'descent'),
+    (None, 'display'),
+    (None, 'dur'),
+    (None, 'end'),
+    (None, 'fill'),
+    (None, 'fill-opacity'),
+    (None, 'fill-rule'),
+    (None, 'font-family'),
+    (None, 'font-size'),
+    (None, 'font-stretch'),
+    (None, 'font-style'),
+    (None, 'font-variant'),
+    (None, 'font-weight'),
+    (None, 'from'),
+    (None, 'fx'),
+    (None, 'fy'),
+    (None, 'g1'),
+    (None, 'g2'),
+    (None, 'glyph-name'),
+    (None, 'gradientUnits'),
+    (None, 'hanging'),
+    (None, 'height'),
+    (None, 'horiz-adv-x'),
+    (None, 'horiz-origin-x'),
+    (None, 'id'),
+    (None, 'ideographic'),
+    (None, 'k'),
+    (None, 'keyPoints'),
+    (None, 'keySplines'),
+    (None, 'keyTimes'),
+    (None, 'lang'),
+    (None, 'marker-end'),
+    (None, 'marker-mid'),
+    (None, 'marker-start'),
+    (None, 'markerHeight'),
+    (None, 'markerUnits'),
+    (None, 'markerWidth'),
+    (None, 'mathematical'),
+    (None, 'max'),
+    (None, 'min'),
+    (None, 'name'),
+    (None, 'offset'),
+    (None, 'opacity'),
+    (None, 'orient'),
+    (None, 'origin'),
+    (None, 'overline-position'),
+    (None, 'overline-thickness'),
+    (None, 'panose-1'),
+    (None, 'path'),
+    (None, 'pathLength'),
+    (None, 'points'),
+    (None, 'preserveAspectRatio'),
+    (None, 'r'),
+    (None, 'refX'),
+    (None, 'refY'),
+    (None, 'repeatCount'),
+    (None, 'repeatDur'),
+    (None, 'requiredExtensions'),
+    (None, 'requiredFeatures'),
+    (None, 'restart'),
+    (None, 'rotate'),
+    (None, 'rx'),
+    (None, 'ry'),
+    (None, 'slope'),
+    (None, 'stemh'),
+    (None, 'stemv'),
+    (None, 'stop-color'),
+    (None, 'stop-opacity'),
+    (None, 'strikethrough-position'),
+    (None, 'strikethrough-thickness'),
+    (None, 'stroke'),
+    (None, 'stroke-dasharray'),
+    (None, 'stroke-dashoffset'),
+    (None, 'stroke-linecap'),
+    (None, 'stroke-linejoin'),
+    (None, 'stroke-miterlimit'),
+    (None, 'stroke-opacity'),
+    (None, 'stroke-width'),
+    (None, 'systemLanguage'),
+    (None, 'target'),
+    (None, 'text-anchor'),
+    (None, 'to'),
+    (None, 'transform'),
+    (None, 'type'),
+    (None, 'u1'),
+    (None, 'u2'),
+    (None, 'underline-position'),
+    (None, 'underline-thickness'),
+    (None, 'unicode'),
+    (None, 'unicode-range'),
+    (None, 'units-per-em'),
+    (None, 'values'),
+    (None, 'version'),
+    (None, 'viewBox'),
+    (None, 'visibility'),
+    (None, 'width'),
+    (None, 'widths'),
+    (None, 'x'),
+    (None, 'x-height'),
+    (None, 'x1'),
+    (None, 'x2'),
+    (namespaces['xlink'], 'actuate'),
+    (namespaces['xlink'], 'arcrole'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xlink'], 'role'),
+    (namespaces['xlink'], 'show'),
+    (namespaces['xlink'], 'title'),
+    (namespaces['xlink'], 'type'),
+    (namespaces['xml'], 'base'),
+    (namespaces['xml'], 'lang'),
+    (namespaces['xml'], 'space'),
+    (None, 'y'),
+    (None, 'y1'),
+    (None, 'y2'),
+    (None, 'zoomAndPan'),
+))
+
+attr_val_is_uri = frozenset((
+    (None, 'href'),
+    (None, 'src'),
+    (None, 'cite'),
+    (None, 'action'),
+    (None, 'longdesc'),
+    (None, 'poster'),
+    (None, 'background'),
+    (None, 'datasrc'),
+    (None, 'dynsrc'),
+    (None, 'lowsrc'),
+    (None, 'ping'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xml'], 'base'),
+))
+
+svg_attr_val_allows_ref = frozenset((
+    (None, 'clip-path'),
+    (None, 'color-profile'),
+    (None, 'cursor'),
+    (None, 'fill'),
+    (None, 'filter'),
+    (None, 'marker'),
+    (None, 'marker-start'),
+    (None, 'marker-mid'),
+    (None, 'marker-end'),
+    (None, 'mask'),
+    (None, 'stroke'),
+))
+
+svg_allow_local_href = frozenset((
+    (None, 'altGlyph'),
+    (None, 'animate'),
+    (None, 'animateColor'),
+    (None, 'animateMotion'),
+    (None, 'animateTransform'),
+    (None, 'cursor'),
+    (None, 'feImage'),
+    (None, 'filter'),
+    (None, 'linearGradient'),
+    (None, 'pattern'),
+    (None, 'radialGradient'),
+    (None, 'textpath'),
+    (None, 'tref'),
+    (None, 'set'),
+    (None, 'use')
+))
+
+allowed_css_properties = frozenset((
+    'azimuth',
+    'background-color',
+    'border-bottom-color',
+    'border-collapse',
+    'border-color',
+    'border-left-color',
+    'border-right-color',
+    'border-top-color',
+    'clear',
+    'color',
+    'cursor',
+    'direction',
+    'display',
+    'elevation',
+    'float',
+    'font',
+    'font-family',
+    'font-size',
+    'font-style',
+    'font-variant',
+    'font-weight',
+    'height',
+    'letter-spacing',
+    'line-height',
+    'overflow',
+    'pause',
+    'pause-after',
+    'pause-before',
+    'pitch',
+    'pitch-range',
+    'richness',
+    'speak',
+    'speak-header',
+    'speak-numeral',
+    'speak-punctuation',
+    'speech-rate',
+    'stress',
+    'text-align',
+    'text-decoration',
+    'text-indent',
+    'unicode-bidi',
+    'vertical-align',
+    'voice-family',
+    'volume',
+    'white-space',
+    'width',
+))
+
+allowed_css_keywords = frozenset((
+    'auto',
+    'aqua',
+    'black',
+    'block',
+    'blue',
+    'bold',
+    'both',
+    'bottom',
+    'brown',
+    'center',
+    'collapse',
+    'dashed',
+    'dotted',
+    'fuchsia',
+    'gray',
+    'green',
+    '!important',
+    'italic',
+    'left',
+    'lime',
+    'maroon',
+    'medium',
+    'none',
+    'navy',
+    'normal',
+    'nowrap',
+    'olive',
+    'pointer',
+    'purple',
+    'red',
+    'right',
+    'solid',
+    'silver',
+    'teal',
+    'top',
+    'transparent',
+    'underline',
+    'white',
+    'yellow',
+))
+
+allowed_svg_properties = frozenset((
+    'fill',
+    'fill-opacity',
+    'fill-rule',
+    'stroke',
+    'stroke-width',
+    'stroke-linecap',
+    'stroke-linejoin',
+    'stroke-opacity',
+))
+
+allowed_protocols = frozenset((
+    'ed2k',
+    'ftp',
+    'http',
+    'https',
+    'irc',
+    'mailto',
+    'news',
+    'gopher',
+    'nntp',
+    'telnet',
+    'webcal',
+    'xmpp',
+    'callto',
+    'feed',
+    'urn',
+    'aim',
+    'rsync',
+    'tag',
+    'ssh',
+    'sftp',
+    'rtsp',
+    'afs',
+    'data',
+))
+
+allowed_content_types = frozenset((
+    'image/png',
+    'image/jpeg',
+    'image/gif',
+    'image/webp',
+    'image/bmp',
+    'text/plain',
+))
+
+
+data_content_type = re.compile(r'''
+                                ^
+                                # Match a content type <application>/<type>
+                                (?P<content_type>[-a-zA-Z0-9.]+/[-a-zA-Z0-9.]+)
+                                # Match any character set and encoding
+                                (?:(?:;charset=(?:[-a-zA-Z0-9]+)(?:;(?:base64))?)
+                                  |(?:;(?:base64))?(?:;charset=(?:[-a-zA-Z0-9]+))?)
+                                # Assume the rest is data
+                                ,.*
+                                $
+                                ''',
+                               re.VERBOSE)
+
+
+class Filter(base.Filter):
+    """Sanitizes token stream of XHTML+MathML+SVG and of inline style attributes"""
+    def __init__(self,
+                 source,
+                 allowed_elements=allowed_elements,
+                 allowed_attributes=allowed_attributes,
+                 allowed_css_properties=allowed_css_properties,
+                 allowed_css_keywords=allowed_css_keywords,
+                 allowed_svg_properties=allowed_svg_properties,
+                 allowed_protocols=allowed_protocols,
+                 allowed_content_types=allowed_content_types,
+                 attr_val_is_uri=attr_val_is_uri,
+                 svg_attr_val_allows_ref=svg_attr_val_allows_ref,
+                 svg_allow_local_href=svg_allow_local_href):
+        """Creates a Filter
+
+        :arg allowed_elements: set of elements to allow--everything else will
+            be escaped
+
+        :arg allowed_attributes: set of attributes to allow in
+            elements--everything else will be stripped
+
+        :arg allowed_css_properties: set of CSS properties to allow--everything
+            else will be stripped
+
+        :arg allowed_css_keywords: set of CSS keywords to allow--everything
+            else will be stripped
+
+        :arg allowed_svg_properties: set of SVG properties to allow--everything
+            else will be removed
+
+        :arg allowed_protocols: set of allowed protocols for URIs
+
+        :arg allowed_content_types: set of allowed content types for ``data`` URIs.
+
+        :arg attr_val_is_uri: set of attributes that have URI values--values
+            that have a scheme not listed in ``allowed_protocols`` are removed
+
+        :arg svg_attr_val_allows_ref: set of SVG attributes that can have
+            references
+
+        :arg svg_allow_local_href: set of SVG elements that can have local
+            hrefs--these are removed
+
+        """
+        super(Filter, self).__init__(source)
+        self.allowed_elements = allowed_elements
+        self.allowed_attributes = allowed_attributes
+        self.allowed_css_properties = allowed_css_properties
+        self.allowed_css_keywords = allowed_css_keywords
+        self.allowed_svg_properties = allowed_svg_properties
+        self.allowed_protocols = allowed_protocols
+        self.allowed_content_types = allowed_content_types
+        self.attr_val_is_uri = attr_val_is_uri
+        self.svg_attr_val_allows_ref = svg_attr_val_allows_ref
+        self.svg_allow_local_href = svg_allow_local_href
+
+    def __iter__(self):
+        for token in base.Filter.__iter__(self):
+            token = self.sanitize_token(token)
+            if token:
+                yield token
+
+    # Sanitize the +html+, escaping all elements not in ALLOWED_ELEMENTS, and
+    # stripping out all attributes not in ALLOWED_ATTRIBUTES. Style attributes
+    # are parsed, and a restricted set, specified by ALLOWED_CSS_PROPERTIES and
+    # ALLOWED_CSS_KEYWORDS, are allowed through. attributes in ATTR_VAL_IS_URI
+    # are scanned, and only URI schemes specified in ALLOWED_PROTOCOLS are
+    # allowed.
+    #
+    #   sanitize_html('<script> do_nasty_stuff() </script>')
+    #    => &lt;script> do_nasty_stuff() &lt;/script>
+    #   sanitize_html('<a href="javascript: sucker();">Click here for $100</a>')
+    #    => <a>Click here for $100</a>
+    def sanitize_token(self, token):
+
+        # accommodate filters which use token_type differently
+        token_type = token["type"]
+        if token_type in ("StartTag", "EndTag", "EmptyTag"):
+            name = token["name"]
+            namespace = token["namespace"]
+            if ((namespace, name) in self.allowed_elements or
+                (namespace is None and
+                 (namespaces["html"], name) in self.allowed_elements)):
+                return self.allowed_token(token)
+            else:
+                return self.disallowed_token(token)
+        elif token_type == "Comment":
+            pass
+        else:
+            return token
+
+    def allowed_token(self, token):
+        if "data" in token:
+            attrs = token["data"]
+            attr_names = set(attrs.keys())
+
+            # Remove forbidden attributes
+            for to_remove in (attr_names - self.allowed_attributes):
+                del token["data"][to_remove]
+                attr_names.remove(to_remove)
+
+            # Remove attributes with disallowed URL values
+            for attr in (attr_names & self.attr_val_is_uri):
+                assert attr in attrs
+                # I don't have a clue where this regexp comes from or why it matches those
+                # characters, nor why we call unescape. I just know it's always been here.
+                # Should you be worried by this comment in a sanitizer? Yes. On the other hand, all
+                # this will do is remove *more* than it otherwise would.
+                val_unescaped = re.sub("[`\x00-\x20\x7f-\xa0\\s]+", '',
+                                       unescape(attrs[attr])).lower()
+                # remove replacement characters from unescaped characters
+                val_unescaped = val_unescaped.replace("\ufffd", "")
+                try:
+                    uri = urlparse.urlparse(val_unescaped)
+                except ValueError:
+                    uri = None
+                    del attrs[attr]
+                if uri and uri.scheme:
+                    if uri.scheme not in self.allowed_protocols:
+                        del attrs[attr]
+                    if uri.scheme == 'data':
+                        m = data_content_type.match(uri.path)
+                        if not m:
+                            del attrs[attr]
+                        elif m.group('content_type') not in self.allowed_content_types:
+                            del attrs[attr]
+
+            for attr in self.svg_attr_val_allows_ref:
+                if attr in attrs:
+                    attrs[attr] = re.sub(r'url\s*\(\s*[^#\s][^)]+?\)',
+                                         ' ',
+                                         unescape(attrs[attr]))
+            if (token["name"] in self.svg_allow_local_href and
+                (namespaces['xlink'], 'href') in attrs and re.search(r'^\s*[^#\s].*',
+                                                                     attrs[(namespaces['xlink'], 'href')])):
+                del attrs[(namespaces['xlink'], 'href')]
+            if (None, 'style') in attrs:
+                attrs[(None, 'style')] = self.sanitize_css(attrs[(None, 'style')])
+            token["data"] = attrs
+        return token
+
+    def disallowed_token(self, token):
+        token_type = token["type"]
+        if token_type == "EndTag":
+            token["data"] = "</%s>" % token["name"]
+        elif token["data"]:
+            assert token_type in ("StartTag", "EmptyTag")
+            attrs = []
+            for (ns, name), v in token["data"].items():
+                attrs.append(' %s="%s"' % (name if ns is None else "%s:%s" % (prefixes[ns], name), escape(v)))
+            token["data"] = "<%s%s>" % (token["name"], ''.join(attrs))
+        else:
+            token["data"] = "<%s>" % token["name"]
+        if token.get("selfClosing"):
+            token["data"] = token["data"][:-1] + "/>"
+
+        token["type"] = "Characters"
+
+        del token["name"]
+        return token
+
+    def sanitize_css(self, style):
+        # disallow urls
+        style = re.compile(r'url\s*\(\s*[^\s)]+?\s*\)\s*').sub(' ', style)
+
+        # gauntlet
+        if not re.match(r"""^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$""", style):
+            return ''
+        if not re.match(r"^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$", style):
+            return ''
+
+        clean = []
+        for prop, value in re.findall(r"([-\w]+)\s*:\s*([^:;]*)", style):
+            if not value:
+                continue
+            if prop.lower() in self.allowed_css_properties:
+                clean.append(prop + ': ' + value + ';')
+            elif prop.split('-')[0].lower() in ['background', 'border', 'margin',
+                                                'padding']:
+                for keyword in value.split():
+                    if keyword not in self.allowed_css_keywords and \
+                            not re.match(r"^(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$", keyword):  # noqa
+                        break
+                else:
+                    clean.append(prop + ': ' + value + ';')
+            elif prop.lower() in self.allowed_svg_properties:
+                clean.append(prop + ': ' + value + ';')
+
+        return ' '.join(clean)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/whitespace.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/whitespace.py
new file mode 100644
index 00000000..0d12584b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/filters/whitespace.py
@@ -0,0 +1,38 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+
+from . import base
+from ..constants import rcdataElements, spaceCharacters
+spaceCharacters = "".join(spaceCharacters)
+
+SPACES_REGEX = re.compile("[%s]+" % spaceCharacters)
+
+
+class Filter(base.Filter):
+    """Collapses whitespace except in pre, textarea, and script elements"""
+    spacePreserveElements = frozenset(["pre", "textarea"] + list(rcdataElements))
+
+    def __iter__(self):
+        preserve = 0
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type == "StartTag" \
+                    and (preserve or token["name"] in self.spacePreserveElements):
+                preserve += 1
+
+            elif type == "EndTag" and preserve:
+                preserve -= 1
+
+            elif not preserve and type == "SpaceCharacters" and token["data"]:
+                # Test on token["data"] above to not introduce spaces where there were not
+                token["data"] = " "
+
+            elif not preserve and type == "Characters":
+                token["data"] = collapse_spaces(token["data"])
+
+            yield token
+
+
+def collapse_spaces(text):
+    return SPACES_REGEX.sub(' ', text)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/html5parser.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/html5parser.py
new file mode 100644
index 00000000..ae41a133
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/html5parser.py
@@ -0,0 +1,2791 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import with_metaclass, viewkeys
+
+import types
+from collections import OrderedDict
+
+from . import _inputstream
+from . import _tokenizer
+
+from . import treebuilders
+from .treebuilders.base import Marker
+
+from . import _utils
+from .constants import (
+    spaceCharacters, asciiUpper2Lower,
+    specialElements, headingElements, cdataElements, rcdataElements,
+    tokenTypes, tagTokenTypes,
+    namespaces,
+    htmlIntegrationPointElements, mathmlTextIntegrationPointElements,
+    adjustForeignAttributes as adjustForeignAttributesMap,
+    adjustMathMLAttributes, adjustSVGAttributes,
+    E,
+    _ReparseException
+)
+
+
+def parse(doc, treebuilder="etree", namespaceHTMLElements=True, **kwargs):
+    """Parse an HTML document as a string or file-like object into a tree
+
+    :arg doc: the document to parse as a string or file-like object
+
+    :arg treebuilder: the treebuilder to use when parsing
+
+    :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+    :returns: parsed tree
+
+    Example:
+
+    >>> from html5lib.html5parser import parse
+    >>> parse('<html><body><p>This is a doc</p></body></html>')
+    <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
+
+    """
+    tb = treebuilders.getTreeBuilder(treebuilder)
+    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
+    return p.parse(doc, **kwargs)
+
+
+def parseFragment(doc, container="div", treebuilder="etree", namespaceHTMLElements=True, **kwargs):
+    """Parse an HTML fragment as a string or file-like object into a tree
+
+    :arg doc: the fragment to parse as a string or file-like object
+
+    :arg container: the container context to parse the fragment in
+
+    :arg treebuilder: the treebuilder to use when parsing
+
+    :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+    :returns: parsed tree
+
+    Example:
+
+    >>> from html5lib.html5libparser import parseFragment
+    >>> parseFragment('<b>this is a fragment</b>')
+    <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
+
+    """
+    tb = treebuilders.getTreeBuilder(treebuilder)
+    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
+    return p.parseFragment(doc, container=container, **kwargs)
+
+
+def method_decorator_metaclass(function):
+    class Decorated(type):
+        def __new__(meta, classname, bases, classDict):
+            for attributeName, attribute in classDict.items():
+                if isinstance(attribute, types.FunctionType):
+                    attribute = function(attribute)
+
+                classDict[attributeName] = attribute
+            return type.__new__(meta, classname, bases, classDict)
+    return Decorated
+
+
+class HTMLParser(object):
+    """HTML parser
+
+    Generates a tree structure from a stream of (possibly malformed) HTML.
+
+    """
+
+    def __init__(self, tree=None, strict=False, namespaceHTMLElements=True, debug=False):
+        """
+        :arg tree: a treebuilder class controlling the type of tree that will be
+            returned. Built in treebuilders can be accessed through
+            html5lib.treebuilders.getTreeBuilder(treeType)
+
+        :arg strict: raise an exception when a parse error is encountered
+
+        :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+        :arg debug: whether or not to enable debug mode which logs things
+
+        Example:
+
+        >>> from html5lib.html5parser import HTMLParser
+        >>> parser = HTMLParser()                     # generates parser with etree builder
+        >>> parser = HTMLParser('lxml', strict=True)  # generates parser with lxml builder which is strict
+
+        """
+
+        # Raise an exception on the first error encountered
+        self.strict = strict
+
+        if tree is None:
+            tree = treebuilders.getTreeBuilder("etree")
+        self.tree = tree(namespaceHTMLElements)
+        self.errors = []
+
+        self.phases = dict([(name, cls(self, self.tree)) for name, cls in
+                            getPhases(debug).items()])
+
+    def _parse(self, stream, innerHTML=False, container="div", scripting=False, **kwargs):
+
+        self.innerHTMLMode = innerHTML
+        self.container = container
+        self.scripting = scripting
+        self.tokenizer = _tokenizer.HTMLTokenizer(stream, parser=self, **kwargs)
+        self.reset()
+
+        try:
+            self.mainLoop()
+        except _ReparseException:
+            self.reset()
+            self.mainLoop()
+
+    def reset(self):
+        self.tree.reset()
+        self.firstStartTag = False
+        self.errors = []
+        self.log = []  # only used with debug mode
+        # "quirks" / "limited quirks" / "no quirks"
+        self.compatMode = "no quirks"
+
+        if self.innerHTMLMode:
+            self.innerHTML = self.container.lower()
+
+            if self.innerHTML in cdataElements:
+                self.tokenizer.state = self.tokenizer.rcdataState
+            elif self.innerHTML in rcdataElements:
+                self.tokenizer.state = self.tokenizer.rawtextState
+            elif self.innerHTML == 'plaintext':
+                self.tokenizer.state = self.tokenizer.plaintextState
+            else:
+                # state already is data state
+                # self.tokenizer.state = self.tokenizer.dataState
+                pass
+            self.phase = self.phases["beforeHtml"]
+            self.phase.insertHtmlElement()
+            self.resetInsertionMode()
+        else:
+            self.innerHTML = False  # pylint:disable=redefined-variable-type
+            self.phase = self.phases["initial"]
+
+        self.lastPhase = None
+
+        self.beforeRCDataPhase = None
+
+        self.framesetOK = True
+
+    @property
+    def documentEncoding(self):
+        """Name of the character encoding that was used to decode the input stream, or
+        :obj:`None` if that is not determined yet
+
+        """
+        if not hasattr(self, 'tokenizer'):
+            return None
+        return self.tokenizer.stream.charEncoding[0].name
+
+    def isHTMLIntegrationPoint(self, element):
+        if (element.name == "annotation-xml" and
+                element.namespace == namespaces["mathml"]):
+            return ("encoding" in element.attributes and
+                    element.attributes["encoding"].translate(
+                        asciiUpper2Lower) in
+                    ("text/html", "application/xhtml+xml"))
+        else:
+            return (element.namespace, element.name) in htmlIntegrationPointElements
+
+    def isMathMLTextIntegrationPoint(self, element):
+        return (element.namespace, element.name) in mathmlTextIntegrationPointElements
+
+    def mainLoop(self):
+        CharactersToken = tokenTypes["Characters"]
+        SpaceCharactersToken = tokenTypes["SpaceCharacters"]
+        StartTagToken = tokenTypes["StartTag"]
+        EndTagToken = tokenTypes["EndTag"]
+        CommentToken = tokenTypes["Comment"]
+        DoctypeToken = tokenTypes["Doctype"]
+        ParseErrorToken = tokenTypes["ParseError"]
+
+        for token in self.normalizedTokens():
+            prev_token = None
+            new_token = token
+            while new_token is not None:
+                prev_token = new_token
+                currentNode = self.tree.openElements[-1] if self.tree.openElements else None
+                currentNodeNamespace = currentNode.namespace if currentNode else None
+                currentNodeName = currentNode.name if currentNode else None
+
+                type = new_token["type"]
+
+                if type == ParseErrorToken:
+                    self.parseError(new_token["data"], new_token.get("datavars", {}))
+                    new_token = None
+                else:
+                    if (len(self.tree.openElements) == 0 or
+                        currentNodeNamespace == self.tree.defaultNamespace or
+                        (self.isMathMLTextIntegrationPoint(currentNode) and
+                         ((type == StartTagToken and
+                           token["name"] not in frozenset(["mglyph", "malignmark"])) or
+                          type in (CharactersToken, SpaceCharactersToken))) or
+                        (currentNodeNamespace == namespaces["mathml"] and
+                         currentNodeName == "annotation-xml" and
+                         type == StartTagToken and
+                         token["name"] == "svg") or
+                        (self.isHTMLIntegrationPoint(currentNode) and
+                         type in (StartTagToken, CharactersToken, SpaceCharactersToken))):
+                        phase = self.phase
+                    else:
+                        phase = self.phases["inForeignContent"]
+
+                    if type == CharactersToken:
+                        new_token = phase.processCharacters(new_token)
+                    elif type == SpaceCharactersToken:
+                        new_token = phase.processSpaceCharacters(new_token)
+                    elif type == StartTagToken:
+                        new_token = phase.processStartTag(new_token)
+                    elif type == EndTagToken:
+                        new_token = phase.processEndTag(new_token)
+                    elif type == CommentToken:
+                        new_token = phase.processComment(new_token)
+                    elif type == DoctypeToken:
+                        new_token = phase.processDoctype(new_token)
+
+            if (type == StartTagToken and prev_token["selfClosing"] and
+                    not prev_token["selfClosingAcknowledged"]):
+                self.parseError("non-void-element-with-trailing-solidus",
+                                {"name": prev_token["name"]})
+
+        # When the loop finishes it's EOF
+        reprocess = True
+        phases = []
+        while reprocess:
+            phases.append(self.phase)
+            reprocess = self.phase.processEOF()
+            if reprocess:
+                assert self.phase not in phases
+
+    def normalizedTokens(self):
+        for token in self.tokenizer:
+            yield self.normalizeToken(token)
+
+    def parse(self, stream, *args, **kwargs):
+        """Parse a HTML document into a well-formed tree
+
+        :arg stream: a file-like object or string containing the HTML to be parsed
+
+            The optional encoding parameter must be a string that indicates
+            the encoding.  If specified, that encoding will be used,
+            regardless of any BOM or later declaration (such as in a meta
+            element).
+
+        :arg scripting: treat noscript elements as if JavaScript was turned on
+
+        :returns: parsed tree
+
+        Example:
+
+        >>> from html5lib.html5parser import HTMLParser
+        >>> parser = HTMLParser()
+        >>> parser.parse('<html><body><p>This is a doc</p></body></html>')
+        <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
+
+        """
+        self._parse(stream, False, None, *args, **kwargs)
+        return self.tree.getDocument()
+
+    def parseFragment(self, stream, *args, **kwargs):
+        """Parse a HTML fragment into a well-formed tree fragment
+
+        :arg container: name of the element we're setting the innerHTML
+            property if set to None, default to 'div'
+
+        :arg stream: a file-like object or string containing the HTML to be parsed
+
+            The optional encoding parameter must be a string that indicates
+            the encoding.  If specified, that encoding will be used,
+            regardless of any BOM or later declaration (such as in a meta
+            element)
+
+        :arg scripting: treat noscript elements as if JavaScript was turned on
+
+        :returns: parsed tree
+
+        Example:
+
+        >>> from html5lib.html5libparser import HTMLParser
+        >>> parser = HTMLParser()
+        >>> parser.parseFragment('<b>this is a fragment</b>')
+        <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
+
+        """
+        self._parse(stream, True, *args, **kwargs)
+        return self.tree.getFragment()
+
+    def parseError(self, errorcode="XXX-undefined-error", datavars=None):
+        # XXX The idea is to make errorcode mandatory.
+        if datavars is None:
+            datavars = {}
+        self.errors.append((self.tokenizer.stream.position(), errorcode, datavars))
+        if self.strict:
+            raise ParseError(E[errorcode] % datavars)
+
+    def normalizeToken(self, token):
+        # HTML5 specific normalizations to the token stream
+        if token["type"] == tokenTypes["StartTag"]:
+            raw = token["data"]
+            token["data"] = OrderedDict(raw)
+            if len(raw) > len(token["data"]):
+                # we had some duplicated attribute, fix so first wins
+                token["data"].update(raw[::-1])
+
+        return token
+
+    def adjustMathMLAttributes(self, token):
+        adjust_attributes(token, adjustMathMLAttributes)
+
+    def adjustSVGAttributes(self, token):
+        adjust_attributes(token, adjustSVGAttributes)
+
+    def adjustForeignAttributes(self, token):
+        adjust_attributes(token, adjustForeignAttributesMap)
+
+    def reparseTokenNormal(self, token):
+        # pylint:disable=unused-argument
+        self.parser.phase()
+
+    def resetInsertionMode(self):
+        # The name of this method is mostly historical. (It's also used in the
+        # specification.)
+        last = False
+        newModes = {
+            "select": "inSelect",
+            "td": "inCell",
+            "th": "inCell",
+            "tr": "inRow",
+            "tbody": "inTableBody",
+            "thead": "inTableBody",
+            "tfoot": "inTableBody",
+            "caption": "inCaption",
+            "colgroup": "inColumnGroup",
+            "table": "inTable",
+            "head": "inBody",
+            "body": "inBody",
+            "frameset": "inFrameset",
+            "html": "beforeHead"
+        }
+        for node in self.tree.openElements[::-1]:
+            nodeName = node.name
+            new_phase = None
+            if node == self.tree.openElements[0]:
+                assert self.innerHTML
+                last = True
+                nodeName = self.innerHTML
+            # Check for conditions that should only happen in the innerHTML
+            # case
+            if nodeName in ("select", "colgroup", "head", "html"):
+                assert self.innerHTML
+
+            if not last and node.namespace != self.tree.defaultNamespace:
+                continue
+
+            if nodeName in newModes:
+                new_phase = self.phases[newModes[nodeName]]
+                break
+            elif last:
+                new_phase = self.phases["inBody"]
+                break
+
+        self.phase = new_phase
+
+    def parseRCDataRawtext(self, token, contentType):
+        # Generic RCDATA/RAWTEXT Parsing algorithm
+        assert contentType in ("RAWTEXT", "RCDATA")
+
+        self.tree.insertElement(token)
+
+        if contentType == "RAWTEXT":
+            self.tokenizer.state = self.tokenizer.rawtextState
+        else:
+            self.tokenizer.state = self.tokenizer.rcdataState
+
+        self.originalPhase = self.phase
+
+        self.phase = self.phases["text"]
+
+
+@_utils.memoize
+def getPhases(debug):
+    def log(function):
+        """Logger that records which phase processes each token"""
+        type_names = dict((value, key) for key, value in
+                          tokenTypes.items())
+
+        def wrapped(self, *args, **kwargs):
+            if function.__name__.startswith("process") and len(args) > 0:
+                token = args[0]
+                try:
+                    info = {"type": type_names[token['type']]}
+                except:
+                    raise
+                if token['type'] in tagTokenTypes:
+                    info["name"] = token['name']
+
+                self.parser.log.append((self.parser.tokenizer.state.__name__,
+                                        self.parser.phase.__class__.__name__,
+                                        self.__class__.__name__,
+                                        function.__name__,
+                                        info))
+                return function(self, *args, **kwargs)
+            else:
+                return function(self, *args, **kwargs)
+        return wrapped
+
+    def getMetaclass(use_metaclass, metaclass_func):
+        if use_metaclass:
+            return method_decorator_metaclass(metaclass_func)
+        else:
+            return type
+
+    # pylint:disable=unused-argument
+    class Phase(with_metaclass(getMetaclass(debug, log))):
+        """Base class for helper object that implements each phase of processing
+        """
+
+        def __init__(self, parser, tree):
+            self.parser = parser
+            self.tree = tree
+
+        def processEOF(self):
+            raise NotImplementedError
+
+        def processComment(self, token):
+            # For most phases the following is correct. Where it's not it will be
+            # overridden.
+            self.tree.insertComment(token, self.tree.openElements[-1])
+
+        def processDoctype(self, token):
+            self.parser.parseError("unexpected-doctype")
+
+        def processCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processSpaceCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processStartTag(self, token):
+            return self.startTagHandler[token["name"]](token)
+
+        def startTagHtml(self, token):
+            if not self.parser.firstStartTag and token["name"] == "html":
+                self.parser.parseError("non-html-root")
+            # XXX Need a check here to see if the first start tag token emitted is
+            # this token... If it's not, invoke self.parser.parseError().
+            for attr, value in token["data"].items():
+                if attr not in self.tree.openElements[0].attributes:
+                    self.tree.openElements[0].attributes[attr] = value
+            self.parser.firstStartTag = False
+
+        def processEndTag(self, token):
+            return self.endTagHandler[token["name"]](token)
+
+    class InitialPhase(Phase):
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processDoctype(self, token):
+            name = token["name"]
+            publicId = token["publicId"]
+            systemId = token["systemId"]
+            correct = token["correct"]
+
+            if (name != "html" or publicId is not None or
+                    systemId is not None and systemId != "about:legacy-compat"):
+                self.parser.parseError("unknown-doctype")
+
+            if publicId is None:
+                publicId = ""
+
+            self.tree.insertDoctype(token)
+
+            if publicId != "":
+                publicId = publicId.translate(asciiUpper2Lower)
+
+            if (not correct or token["name"] != "html" or
+                    publicId.startswith(
+                        ("+//silmaril//dtd html pro v0r11 19970101//",
+                         "-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
+                         "-//as//dtd html 3.0 aswedit + extensions//",
+                         "-//ietf//dtd html 2.0 level 1//",
+                         "-//ietf//dtd html 2.0 level 2//",
+                         "-//ietf//dtd html 2.0 strict level 1//",
+                         "-//ietf//dtd html 2.0 strict level 2//",
+                         "-//ietf//dtd html 2.0 strict//",
+                         "-//ietf//dtd html 2.0//",
+                         "-//ietf//dtd html 2.1e//",
+                         "-//ietf//dtd html 3.0//",
+                         "-//ietf//dtd html 3.2 final//",
+                         "-//ietf//dtd html 3.2//",
+                         "-//ietf//dtd html 3//",
+                         "-//ietf//dtd html level 0//",
+                         "-//ietf//dtd html level 1//",
+                         "-//ietf//dtd html level 2//",
+                         "-//ietf//dtd html level 3//",
+                         "-//ietf//dtd html strict level 0//",
+                         "-//ietf//dtd html strict level 1//",
+                         "-//ietf//dtd html strict level 2//",
+                         "-//ietf//dtd html strict level 3//",
+                         "-//ietf//dtd html strict//",
+                         "-//ietf//dtd html//",
+                         "-//metrius//dtd metrius presentational//",
+                         "-//microsoft//dtd internet explorer 2.0 html strict//",
+                         "-//microsoft//dtd internet explorer 2.0 html//",
+                         "-//microsoft//dtd internet explorer 2.0 tables//",
+                         "-//microsoft//dtd internet explorer 3.0 html strict//",
+                         "-//microsoft//dtd internet explorer 3.0 html//",
+                         "-//microsoft//dtd internet explorer 3.0 tables//",
+                         "-//netscape comm. corp.//dtd html//",
+                         "-//netscape comm. corp.//dtd strict html//",
+                         "-//o'reilly and associates//dtd html 2.0//",
+                         "-//o'reilly and associates//dtd html extended 1.0//",
+                         "-//o'reilly and associates//dtd html extended relaxed 1.0//",
+                         "-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
+                         "-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
+                         "-//spyglass//dtd html 2.0 extended//",
+                         "-//sq//dtd html 2.0 hotmetal + extensions//",
+                         "-//sun microsystems corp.//dtd hotjava html//",
+                         "-//sun microsystems corp.//dtd hotjava strict html//",
+                         "-//w3c//dtd html 3 1995-03-24//",
+                         "-//w3c//dtd html 3.2 draft//",
+                         "-//w3c//dtd html 3.2 final//",
+                         "-//w3c//dtd html 3.2//",
+                         "-//w3c//dtd html 3.2s draft//",
+                         "-//w3c//dtd html 4.0 frameset//",
+                         "-//w3c//dtd html 4.0 transitional//",
+                         "-//w3c//dtd html experimental 19960712//",
+                         "-//w3c//dtd html experimental 970421//",
+                         "-//w3c//dtd w3 html//",
+                         "-//w3o//dtd w3 html 3.0//",
+                         "-//webtechs//dtd mozilla html 2.0//",
+                         "-//webtechs//dtd mozilla html//")) or
+                    publicId in ("-//w3o//dtd w3 html strict 3.0//en//",
+                                 "-/w3c/dtd html 4.0 transitional/en",
+                                 "html") or
+                    publicId.startswith(
+                        ("-//w3c//dtd html 4.01 frameset//",
+                         "-//w3c//dtd html 4.01 transitional//")) and
+                    systemId is None or
+                    systemId and systemId.lower() == "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"):
+                self.parser.compatMode = "quirks"
+            elif (publicId.startswith(
+                    ("-//w3c//dtd xhtml 1.0 frameset//",
+                     "-//w3c//dtd xhtml 1.0 transitional//")) or
+                  publicId.startswith(
+                      ("-//w3c//dtd html 4.01 frameset//",
+                       "-//w3c//dtd html 4.01 transitional//")) and
+                  systemId is not None):
+                self.parser.compatMode = "limited quirks"
+
+            self.parser.phase = self.parser.phases["beforeHtml"]
+
+        def anythingElse(self):
+            self.parser.compatMode = "quirks"
+            self.parser.phase = self.parser.phases["beforeHtml"]
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-doctype-but-got-chars")
+            self.anythingElse()
+            return token
+
+        def processStartTag(self, token):
+            self.parser.parseError("expected-doctype-but-got-start-tag",
+                                   {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-doctype-but-got-end-tag",
+                                   {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def processEOF(self):
+            self.parser.parseError("expected-doctype-but-got-eof")
+            self.anythingElse()
+            return True
+
+    class BeforeHtmlPhase(Phase):
+        # helper methods
+        def insertHtmlElement(self):
+            self.tree.insertRoot(impliedTagToken("html", "StartTag"))
+            self.parser.phase = self.parser.phases["beforeHead"]
+
+        # other
+        def processEOF(self):
+            self.insertHtmlElement()
+            return True
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processCharacters(self, token):
+            self.insertHtmlElement()
+            return token
+
+        def processStartTag(self, token):
+            if token["name"] == "html":
+                self.parser.firstStartTag = True
+            self.insertHtmlElement()
+            return token
+
+        def processEndTag(self, token):
+            if token["name"] not in ("head", "body", "html", "br"):
+                self.parser.parseError("unexpected-end-tag-before-html",
+                                       {"name": token["name"]})
+            else:
+                self.insertHtmlElement()
+                return token
+
+    class BeforeHeadPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("head", self.startTagHead)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                (("head", "body", "html", "br"), self.endTagImplyHead)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return True
+
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processCharacters(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagHead(self, token):
+            self.tree.insertElement(token)
+            self.tree.headPointer = self.tree.openElements[-1]
+            self.parser.phase = self.parser.phases["inHead"]
+
+        def startTagOther(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def endTagImplyHead(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("end-tag-after-implied-root",
+                                   {"name": token["name"]})
+
+    class InHeadPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("title", self.startTagTitle),
+                (("noframes", "style"), self.startTagNoFramesStyle),
+                ("noscript", self.startTagNoscript),
+                ("script", self.startTagScript),
+                (("base", "basefont", "bgsound", "command", "link"),
+                 self.startTagBaseLinkCommand),
+                ("meta", self.startTagMeta),
+                ("head", self.startTagHead)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("head", self.endTagHead),
+                (("br", "html", "body"), self.endTagHtmlBodyBr)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # the real thing
+        def processEOF(self):
+            self.anythingElse()
+            return True
+
+        def processCharacters(self, token):
+            self.anythingElse()
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagHead(self, token):
+            self.parser.parseError("two-heads-are-not-better-than-one")
+
+        def startTagBaseLinkCommand(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagMeta(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+            attributes = token["data"]
+            if self.parser.tokenizer.stream.charEncoding[1] == "tentative":
+                if "charset" in attributes:
+                    self.parser.tokenizer.stream.changeEncoding(attributes["charset"])
+                elif ("content" in attributes and
+                      "http-equiv" in attributes and
+                      attributes["http-equiv"].lower() == "content-type"):
+                    # Encoding it as UTF-8 here is a hack, as really we should pass
+                    # the abstract Unicode string, and just use the
+                    # ContentAttrParser on that, but using UTF-8 allows all chars
+                    # to be encoded and as a ASCII-superset works.
+                    data = _inputstream.EncodingBytes(attributes["content"].encode("utf-8"))
+                    parser = _inputstream.ContentAttrParser(data)
+                    codec = parser.parse()
+                    self.parser.tokenizer.stream.changeEncoding(codec)
+
+        def startTagTitle(self, token):
+            self.parser.parseRCDataRawtext(token, "RCDATA")
+
+        def startTagNoFramesStyle(self, token):
+            # Need to decide whether to implement the scripting-disabled case
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagNoscript(self, token):
+            if self.parser.scripting:
+                self.parser.parseRCDataRawtext(token, "RAWTEXT")
+            else:
+                self.tree.insertElement(token)
+                self.parser.phase = self.parser.phases["inHeadNoscript"]
+
+        def startTagScript(self, token):
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.scriptDataState
+            self.parser.originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["text"]
+
+        def startTagOther(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagHead(self, token):
+            node = self.parser.tree.openElements.pop()
+            assert node.name == "head", "Expected head got %s" % node.name
+            self.parser.phase = self.parser.phases["afterHead"]
+
+        def endTagHtmlBodyBr(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            self.endTagHead(impliedTagToken("head"))
+
+    class InHeadNoscriptPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                (("basefont", "bgsound", "link", "meta", "noframes", "style"), self.startTagBaseLinkCommand),
+                (("head", "noscript"), self.startTagHeadNoscript),
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("noscript", self.endTagNoscript),
+                ("br", self.endTagBr),
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            self.parser.parseError("eof-in-head-noscript")
+            self.anythingElse()
+            return True
+
+        def processComment(self, token):
+            return self.parser.phases["inHead"].processComment(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("char-in-head-noscript")
+            self.anythingElse()
+            return token
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inHead"].processSpaceCharacters(token)
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagBaseLinkCommand(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagHeadNoscript(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def endTagNoscript(self, token):
+            node = self.parser.tree.openElements.pop()
+            assert node.name == "noscript", "Expected noscript got %s" % node.name
+            self.parser.phase = self.parser.phases["inHead"]
+
+        def endTagBr(self, token):
+            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            # Caller must raise parse error first!
+            self.endTagNoscript(impliedTagToken("noscript"))
+
+    class AfterHeadPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("body", self.startTagBody),
+                ("frameset", self.startTagFrameset),
+                (("base", "basefont", "bgsound", "link", "meta", "noframes", "script",
+                  "style", "title"),
+                 self.startTagFromHead),
+                ("head", self.startTagHead)
+            ])
+            self.startTagHandler.default = self.startTagOther
+            self.endTagHandler = _utils.MethodDispatcher([(("body", "html", "br"),
+                                                           self.endTagHtmlBodyBr)])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            self.anythingElse()
+            return True
+
+        def processCharacters(self, token):
+            self.anythingElse()
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagBody(self, token):
+            self.parser.framesetOK = False
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inBody"]
+
+        def startTagFrameset(self, token):
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inFrameset"]
+
+        def startTagFromHead(self, token):
+            self.parser.parseError("unexpected-start-tag-out-of-my-head",
+                                   {"name": token["name"]})
+            self.tree.openElements.append(self.tree.headPointer)
+            self.parser.phases["inHead"].processStartTag(token)
+            for node in self.tree.openElements[::-1]:
+                if node.name == "head":
+                    self.tree.openElements.remove(node)
+                    break
+
+        def startTagHead(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagHtmlBodyBr(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            self.tree.insertElement(impliedTagToken("body", "StartTag"))
+            self.parser.phase = self.parser.phases["inBody"]
+            self.parser.framesetOK = True
+
+    class InBodyPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#parsing-main-inbody
+        # the really-really-really-very crazy mode
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            # Set this to the default handler
+            self.processSpaceCharacters = self.processSpaceCharactersNonPre
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                (("base", "basefont", "bgsound", "command", "link", "meta",
+                  "script", "style", "title"),
+                 self.startTagProcessInHead),
+                ("body", self.startTagBody),
+                ("frameset", self.startTagFrameset),
+                (("address", "article", "aside", "blockquote", "center", "details",
+                  "dir", "div", "dl", "fieldset", "figcaption", "figure",
+                  "footer", "header", "hgroup", "main", "menu", "nav", "ol", "p",
+                  "section", "summary", "ul"),
+                 self.startTagCloseP),
+                (headingElements, self.startTagHeading),
+                (("pre", "listing"), self.startTagPreListing),
+                ("form", self.startTagForm),
+                (("li", "dd", "dt"), self.startTagListItem),
+                ("plaintext", self.startTagPlaintext),
+                ("a", self.startTagA),
+                (("b", "big", "code", "em", "font", "i", "s", "small", "strike",
+                  "strong", "tt", "u"), self.startTagFormatting),
+                ("nobr", self.startTagNobr),
+                ("button", self.startTagButton),
+                (("applet", "marquee", "object"), self.startTagAppletMarqueeObject),
+                ("xmp", self.startTagXmp),
+                ("table", self.startTagTable),
+                (("area", "br", "embed", "img", "keygen", "wbr"),
+                 self.startTagVoidFormatting),
+                (("param", "source", "track"), self.startTagParamSource),
+                ("input", self.startTagInput),
+                ("hr", self.startTagHr),
+                ("image", self.startTagImage),
+                ("isindex", self.startTagIsIndex),
+                ("textarea", self.startTagTextarea),
+                ("iframe", self.startTagIFrame),
+                ("noscript", self.startTagNoscript),
+                (("noembed", "noframes"), self.startTagRawtext),
+                ("select", self.startTagSelect),
+                (("rp", "rt"), self.startTagRpRt),
+                (("option", "optgroup"), self.startTagOpt),
+                (("math"), self.startTagMath),
+                (("svg"), self.startTagSvg),
+                (("caption", "col", "colgroup", "frame", "head",
+                  "tbody", "td", "tfoot", "th", "thead",
+                  "tr"), self.startTagMisplaced)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("body", self.endTagBody),
+                ("html", self.endTagHtml),
+                (("address", "article", "aside", "blockquote", "button", "center",
+                  "details", "dialog", "dir", "div", "dl", "fieldset", "figcaption", "figure",
+                  "footer", "header", "hgroup", "listing", "main", "menu", "nav", "ol", "pre",
+                  "section", "summary", "ul"), self.endTagBlock),
+                ("form", self.endTagForm),
+                ("p", self.endTagP),
+                (("dd", "dt", "li"), self.endTagListItem),
+                (headingElements, self.endTagHeading),
+                (("a", "b", "big", "code", "em", "font", "i", "nobr", "s", "small",
+                  "strike", "strong", "tt", "u"), self.endTagFormatting),
+                (("applet", "marquee", "object"), self.endTagAppletMarqueeObject),
+                ("br", self.endTagBr),
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def isMatchingFormattingElement(self, node1, node2):
+            return (node1.name == node2.name and
+                    node1.namespace == node2.namespace and
+                    node1.attributes == node2.attributes)
+
+        # helper
+        def addFormattingElement(self, token):
+            self.tree.insertElement(token)
+            element = self.tree.openElements[-1]
+
+            matchingElements = []
+            for node in self.tree.activeFormattingElements[::-1]:
+                if node is Marker:
+                    break
+                elif self.isMatchingFormattingElement(node, element):
+                    matchingElements.append(node)
+
+            assert len(matchingElements) <= 3
+            if len(matchingElements) == 3:
+                self.tree.activeFormattingElements.remove(matchingElements[-1])
+            self.tree.activeFormattingElements.append(element)
+
+        # the real deal
+        def processEOF(self):
+            allowed_elements = frozenset(("dd", "dt", "li", "p", "tbody", "td",
+                                          "tfoot", "th", "thead", "tr", "body",
+                                          "html"))
+            for node in self.tree.openElements[::-1]:
+                if node.name not in allowed_elements:
+                    self.parser.parseError("expected-closing-tag-but-got-eof")
+                    break
+            # Stop parsing
+
+        def processSpaceCharactersDropNewline(self, token):
+            # Sometimes (start of <pre>, <listing>, and <textarea> blocks) we
+            # want to drop leading newlines
+            data = token["data"]
+            self.processSpaceCharacters = self.processSpaceCharactersNonPre
+            if (data.startswith("\n") and
+                self.tree.openElements[-1].name in ("pre", "listing", "textarea") and
+                    not self.tree.openElements[-1].hasContent()):
+                data = data[1:]
+            if data:
+                self.tree.reconstructActiveFormattingElements()
+                self.tree.insertText(data)
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                # The tokenizer should always emit null on its own
+                return
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertText(token["data"])
+            # This must be bad for performance
+            if (self.parser.framesetOK and
+                any([char not in spaceCharacters
+                     for char in token["data"]])):
+                self.parser.framesetOK = False
+
+        def processSpaceCharactersNonPre(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertText(token["data"])
+
+        def startTagProcessInHead(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagBody(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": "body"})
+            if (len(self.tree.openElements) == 1 or
+                    self.tree.openElements[1].name != "body"):
+                assert self.parser.innerHTML
+            else:
+                self.parser.framesetOK = False
+                for attr, value in token["data"].items():
+                    if attr not in self.tree.openElements[1].attributes:
+                        self.tree.openElements[1].attributes[attr] = value
+
+        def startTagFrameset(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": "frameset"})
+            if (len(self.tree.openElements) == 1 or self.tree.openElements[1].name != "body"):
+                assert self.parser.innerHTML
+            elif not self.parser.framesetOK:
+                pass
+            else:
+                if self.tree.openElements[1].parent:
+                    self.tree.openElements[1].parent.removeChild(self.tree.openElements[1])
+                while self.tree.openElements[-1].name != "html":
+                    self.tree.openElements.pop()
+                self.tree.insertElement(token)
+                self.parser.phase = self.parser.phases["inFrameset"]
+
+        def startTagCloseP(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+
+        def startTagPreListing(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
+
+        def startTagForm(self, token):
+            if self.tree.formPointer:
+                self.parser.parseError("unexpected-start-tag", {"name": "form"})
+            else:
+                if self.tree.elementInScope("p", variant="button"):
+                    self.endTagP(impliedTagToken("p"))
+                self.tree.insertElement(token)
+                self.tree.formPointer = self.tree.openElements[-1]
+
+        def startTagListItem(self, token):
+            self.parser.framesetOK = False
+
+            stopNamesMap = {"li": ["li"],
+                            "dt": ["dt", "dd"],
+                            "dd": ["dt", "dd"]}
+            stopNames = stopNamesMap[token["name"]]
+            for node in reversed(self.tree.openElements):
+                if node.name in stopNames:
+                    self.parser.phase.processEndTag(
+                        impliedTagToken(node.name, "EndTag"))
+                    break
+                if (node.nameTuple in specialElements and
+                        node.name not in ("address", "div", "p")):
+                    break
+
+            if self.tree.elementInScope("p", variant="button"):
+                self.parser.phase.processEndTag(
+                    impliedTagToken("p", "EndTag"))
+
+            self.tree.insertElement(token)
+
+        def startTagPlaintext(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.plaintextState
+
+        def startTagHeading(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            if self.tree.openElements[-1].name in headingElements:
+                self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagA(self, token):
+            afeAElement = self.tree.elementInActiveFormattingElements("a")
+            if afeAElement:
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "a", "endName": "a"})
+                self.endTagFormatting(impliedTagToken("a"))
+                if afeAElement in self.tree.openElements:
+                    self.tree.openElements.remove(afeAElement)
+                if afeAElement in self.tree.activeFormattingElements:
+                    self.tree.activeFormattingElements.remove(afeAElement)
+            self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagFormatting(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagNobr(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            if self.tree.elementInScope("nobr"):
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "nobr", "endName": "nobr"})
+                self.processEndTag(impliedTagToken("nobr"))
+                # XXX Need tests that trigger the following
+                self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagButton(self, token):
+            if self.tree.elementInScope("button"):
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "button", "endName": "button"})
+                self.processEndTag(impliedTagToken("button"))
+                return token
+            else:
+                self.tree.reconstructActiveFormattingElements()
+                self.tree.insertElement(token)
+                self.parser.framesetOK = False
+
+        def startTagAppletMarqueeObject(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.tree.activeFormattingElements.append(Marker)
+            self.parser.framesetOK = False
+
+        def startTagXmp(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.framesetOK = False
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagTable(self, token):
+            if self.parser.compatMode != "quirks":
+                if self.tree.elementInScope("p", variant="button"):
+                    self.processEndTag(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            self.parser.phase = self.parser.phases["inTable"]
+
+        def startTagVoidFormatting(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+            self.parser.framesetOK = False
+
+        def startTagInput(self, token):
+            framesetOK = self.parser.framesetOK
+            self.startTagVoidFormatting(token)
+            if ("type" in token["data"] and
+                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
+                # input type=hidden doesn't change framesetOK
+                self.parser.framesetOK = framesetOK
+
+        def startTagParamSource(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagHr(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+            self.parser.framesetOK = False
+
+        def startTagImage(self, token):
+            # No really...
+            self.parser.parseError("unexpected-start-tag-treated-as",
+                                   {"originalName": "image", "newName": "img"})
+            self.processStartTag(impliedTagToken("img", "StartTag",
+                                                 attributes=token["data"],
+                                                 selfClosing=token["selfClosing"]))
+
+        def startTagIsIndex(self, token):
+            self.parser.parseError("deprecated-tag", {"name": "isindex"})
+            if self.tree.formPointer:
+                return
+            form_attrs = {}
+            if "action" in token["data"]:
+                form_attrs["action"] = token["data"]["action"]
+            self.processStartTag(impliedTagToken("form", "StartTag",
+                                                 attributes=form_attrs))
+            self.processStartTag(impliedTagToken("hr", "StartTag"))
+            self.processStartTag(impliedTagToken("label", "StartTag"))
+            # XXX Localization ...
+            if "prompt" in token["data"]:
+                prompt = token["data"]["prompt"]
+            else:
+                prompt = "This is a searchable index. Enter search keywords: "
+            self.processCharacters(
+                {"type": tokenTypes["Characters"], "data": prompt})
+            attributes = token["data"].copy()
+            if "action" in attributes:
+                del attributes["action"]
+            if "prompt" in attributes:
+                del attributes["prompt"]
+            attributes["name"] = "isindex"
+            self.processStartTag(impliedTagToken("input", "StartTag",
+                                                 attributes=attributes,
+                                                 selfClosing=token["selfClosing"]))
+            self.processEndTag(impliedTagToken("label"))
+            self.processStartTag(impliedTagToken("hr", "StartTag"))
+            self.processEndTag(impliedTagToken("form"))
+
+        def startTagTextarea(self, token):
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.rcdataState
+            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
+            self.parser.framesetOK = False
+
+        def startTagIFrame(self, token):
+            self.parser.framesetOK = False
+            self.startTagRawtext(token)
+
+        def startTagNoscript(self, token):
+            if self.parser.scripting:
+                self.startTagRawtext(token)
+            else:
+                self.startTagOther(token)
+
+        def startTagRawtext(self, token):
+            """iframe, noembed noframes, noscript(if scripting enabled)"""
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagOpt(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.parser.phase.processEndTag(impliedTagToken("option"))
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.tree.insertElement(token)
+
+        def startTagSelect(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            if self.parser.phase in (self.parser.phases["inTable"],
+                                     self.parser.phases["inCaption"],
+                                     self.parser.phases["inColumnGroup"],
+                                     self.parser.phases["inTableBody"],
+                                     self.parser.phases["inRow"],
+                                     self.parser.phases["inCell"]):
+                self.parser.phase = self.parser.phases["inSelectInTable"]
+            else:
+                self.parser.phase = self.parser.phases["inSelect"]
+
+        def startTagRpRt(self, token):
+            if self.tree.elementInScope("ruby"):
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "ruby":
+                    self.parser.parseError()
+            self.tree.insertElement(token)
+
+        def startTagMath(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.adjustMathMLAttributes(token)
+            self.parser.adjustForeignAttributes(token)
+            token["namespace"] = namespaces["mathml"]
+            self.tree.insertElement(token)
+            # Need to get the parse error right for the case where the token
+            # has a namespace not equal to the xmlns attribute
+            if token["selfClosing"]:
+                self.tree.openElements.pop()
+                token["selfClosingAcknowledged"] = True
+
+        def startTagSvg(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.adjustSVGAttributes(token)
+            self.parser.adjustForeignAttributes(token)
+            token["namespace"] = namespaces["svg"]
+            self.tree.insertElement(token)
+            # Need to get the parse error right for the case where the token
+            # has a namespace not equal to the xmlns attribute
+            if token["selfClosing"]:
+                self.tree.openElements.pop()
+                token["selfClosingAcknowledged"] = True
+
+        def startTagMisplaced(self, token):
+            """ Elements that should be children of other elements that have a
+            different insertion mode; here they are ignored
+            "caption", "col", "colgroup", "frame", "frameset", "head",
+            "option", "optgroup", "tbody", "td", "tfoot", "th", "thead",
+            "tr", "noscript"
+            """
+            self.parser.parseError("unexpected-start-tag-ignored", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+
+        def endTagP(self, token):
+            if not self.tree.elementInScope("p", variant="button"):
+                self.startTagCloseP(impliedTagToken("p", "StartTag"))
+                self.parser.parseError("unexpected-end-tag", {"name": "p"})
+                self.endTagP(impliedTagToken("p", "EndTag"))
+            else:
+                self.tree.generateImpliedEndTags("p")
+                if self.tree.openElements[-1].name != "p":
+                    self.parser.parseError("unexpected-end-tag", {"name": "p"})
+                node = self.tree.openElements.pop()
+                while node.name != "p":
+                    node = self.tree.openElements.pop()
+
+        def endTagBody(self, token):
+            if not self.tree.elementInScope("body"):
+                self.parser.parseError()
+                return
+            elif self.tree.openElements[-1].name != "body":
+                for node in self.tree.openElements[2:]:
+                    if node.name not in frozenset(("dd", "dt", "li", "optgroup",
+                                                   "option", "p", "rp", "rt",
+                                                   "tbody", "td", "tfoot",
+                                                   "th", "thead", "tr", "body",
+                                                   "html")):
+                        # Not sure this is the correct name for the parse error
+                        self.parser.parseError(
+                            "expected-one-end-tag-but-got-another",
+                            {"gotName": "body", "expectedName": node.name})
+                        break
+            self.parser.phase = self.parser.phases["afterBody"]
+
+        def endTagHtml(self, token):
+            # We repeat the test for the body end tag token being ignored here
+            if self.tree.elementInScope("body"):
+                self.endTagBody(impliedTagToken("body"))
+                return token
+
+        def endTagBlock(self, token):
+            # Put us back in the right whitespace handling mode
+            if token["name"] == "pre":
+                self.processSpaceCharacters = self.processSpaceCharactersNonPre
+            inScope = self.tree.elementInScope(token["name"])
+            if inScope:
+                self.tree.generateImpliedEndTags()
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+            if inScope:
+                node = self.tree.openElements.pop()
+                while node.name != token["name"]:
+                    node = self.tree.openElements.pop()
+
+        def endTagForm(self, token):
+            node = self.tree.formPointer
+            self.tree.formPointer = None
+            if node is None or not self.tree.elementInScope(node):
+                self.parser.parseError("unexpected-end-tag",
+                                       {"name": "form"})
+            else:
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1] != node:
+                    self.parser.parseError("end-tag-too-early-ignored",
+                                           {"name": "form"})
+                self.tree.openElements.remove(node)
+
+        def endTagListItem(self, token):
+            if token["name"] == "li":
+                variant = "list"
+            else:
+                variant = None
+            if not self.tree.elementInScope(token["name"], variant=variant):
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+            else:
+                self.tree.generateImpliedEndTags(exclude=token["name"])
+                if self.tree.openElements[-1].name != token["name"]:
+                    self.parser.parseError(
+                        "end-tag-too-early",
+                        {"name": token["name"]})
+                node = self.tree.openElements.pop()
+                while node.name != token["name"]:
+                    node = self.tree.openElements.pop()
+
+        def endTagHeading(self, token):
+            for item in headingElements:
+                if self.tree.elementInScope(item):
+                    self.tree.generateImpliedEndTags()
+                    break
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+
+            for item in headingElements:
+                if self.tree.elementInScope(item):
+                    item = self.tree.openElements.pop()
+                    while item.name not in headingElements:
+                        item = self.tree.openElements.pop()
+                    break
+
+        def endTagFormatting(self, token):
+            """The much-feared adoption agency algorithm"""
+            # http://svn.whatwg.org/webapps/complete.html#adoptionAgency revision 7867
+            # XXX Better parseError messages appreciated.
+
+            # Step 1
+            outerLoopCounter = 0
+
+            # Step 2
+            while outerLoopCounter < 8:
+
+                # Step 3
+                outerLoopCounter += 1
+
+                # Step 4:
+
+                # Let the formatting element be the last element in
+                # the list of active formatting elements that:
+                # - is between the end of the list and the last scope
+                # marker in the list, if any, or the start of the list
+                # otherwise, and
+                # - has the same tag name as the token.
+                formattingElement = self.tree.elementInActiveFormattingElements(
+                    token["name"])
+                if (not formattingElement or
+                    (formattingElement in self.tree.openElements and
+                     not self.tree.elementInScope(formattingElement.name))):
+                    # If there is no such node, then abort these steps
+                    # and instead act as described in the "any other
+                    # end tag" entry below.
+                    self.endTagOther(token)
+                    return
+
+                # Otherwise, if there is such a node, but that node is
+                # not in the stack of open elements, then this is a
+                # parse error; remove the element from the list, and
+                # abort these steps.
+                elif formattingElement not in self.tree.openElements:
+                    self.parser.parseError("adoption-agency-1.2", {"name": token["name"]})
+                    self.tree.activeFormattingElements.remove(formattingElement)
+                    return
+
+                # Otherwise, if there is such a node, and that node is
+                # also in the stack of open elements, but the element
+                # is not in scope, then this is a parse error; ignore
+                # the token, and abort these steps.
+                elif not self.tree.elementInScope(formattingElement.name):
+                    self.parser.parseError("adoption-agency-4.4", {"name": token["name"]})
+                    return
+
+                # Otherwise, there is a formatting element and that
+                # element is in the stack and is in scope. If the
+                # element is not the current node, this is a parse
+                # error. In any case, proceed with the algorithm as
+                # written in the following steps.
+                else:
+                    if formattingElement != self.tree.openElements[-1]:
+                        self.parser.parseError("adoption-agency-1.3", {"name": token["name"]})
+
+                # Step 5:
+
+                # Let the furthest block be the topmost node in the
+                # stack of open elements that is lower in the stack
+                # than the formatting element, and is an element in
+                # the special category. There might not be one.
+                afeIndex = self.tree.openElements.index(formattingElement)
+                furthestBlock = None
+                for element in self.tree.openElements[afeIndex:]:
+                    if element.nameTuple in specialElements:
+                        furthestBlock = element
+                        break
+
+                # Step 6:
+
+                # If there is no furthest block, then the UA must
+                # first pop all the nodes from the bottom of the stack
+                # of open elements, from the current node up to and
+                # including the formatting element, then remove the
+                # formatting element from the list of active
+                # formatting elements, and finally abort these steps.
+                if furthestBlock is None:
+                    element = self.tree.openElements.pop()
+                    while element != formattingElement:
+                        element = self.tree.openElements.pop()
+                    self.tree.activeFormattingElements.remove(element)
+                    return
+
+                # Step 7
+                commonAncestor = self.tree.openElements[afeIndex - 1]
+
+                # Step 8:
+                # The bookmark is supposed to help us identify where to reinsert
+                # nodes in step 15. We have to ensure that we reinsert nodes after
+                # the node before the active formatting element. Note the bookmark
+                # can move in step 9.7
+                bookmark = self.tree.activeFormattingElements.index(formattingElement)
+
+                # Step 9
+                lastNode = node = furthestBlock
+                innerLoopCounter = 0
+
+                index = self.tree.openElements.index(node)
+                while innerLoopCounter < 3:
+                    innerLoopCounter += 1
+                    # Node is element before node in open elements
+                    index -= 1
+                    node = self.tree.openElements[index]
+                    if node not in self.tree.activeFormattingElements:
+                        self.tree.openElements.remove(node)
+                        continue
+                    # Step 9.6
+                    if node == formattingElement:
+                        break
+                    # Step 9.7
+                    if lastNode == furthestBlock:
+                        bookmark = self.tree.activeFormattingElements.index(node) + 1
+                    # Step 9.8
+                    clone = node.cloneNode()
+                    # Replace node with clone
+                    self.tree.activeFormattingElements[
+                        self.tree.activeFormattingElements.index(node)] = clone
+                    self.tree.openElements[
+                        self.tree.openElements.index(node)] = clone
+                    node = clone
+                    # Step 9.9
+                    # Remove lastNode from its parents, if any
+                    if lastNode.parent:
+                        lastNode.parent.removeChild(lastNode)
+                    node.appendChild(lastNode)
+                    # Step 9.10
+                    lastNode = node
+
+                # Step 10
+                # Foster parent lastNode if commonAncestor is a
+                # table, tbody, tfoot, thead, or tr we need to foster
+                # parent the lastNode
+                if lastNode.parent:
+                    lastNode.parent.removeChild(lastNode)
+
+                if commonAncestor.name in frozenset(("table", "tbody", "tfoot", "thead", "tr")):
+                    parent, insertBefore = self.tree.getTableMisnestedNodePosition()
+                    parent.insertBefore(lastNode, insertBefore)
+                else:
+                    commonAncestor.appendChild(lastNode)
+
+                # Step 11
+                clone = formattingElement.cloneNode()
+
+                # Step 12
+                furthestBlock.reparentChildren(clone)
+
+                # Step 13
+                furthestBlock.appendChild(clone)
+
+                # Step 14
+                self.tree.activeFormattingElements.remove(formattingElement)
+                self.tree.activeFormattingElements.insert(bookmark, clone)
+
+                # Step 15
+                self.tree.openElements.remove(formattingElement)
+                self.tree.openElements.insert(
+                    self.tree.openElements.index(furthestBlock) + 1, clone)
+
+        def endTagAppletMarqueeObject(self, token):
+            if self.tree.elementInScope(token["name"]):
+                self.tree.generateImpliedEndTags()
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+
+            if self.tree.elementInScope(token["name"]):
+                element = self.tree.openElements.pop()
+                while element.name != token["name"]:
+                    element = self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+
+        def endTagBr(self, token):
+            self.parser.parseError("unexpected-end-tag-treated-as",
+                                   {"originalName": "br", "newName": "br element"})
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(impliedTagToken("br", "StartTag"))
+            self.tree.openElements.pop()
+
+        def endTagOther(self, token):
+            for node in self.tree.openElements[::-1]:
+                if node.name == token["name"]:
+                    self.tree.generateImpliedEndTags(exclude=token["name"])
+                    if self.tree.openElements[-1].name != token["name"]:
+                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+                    while self.tree.openElements.pop() != node:
+                        pass
+                    break
+                else:
+                    if node.nameTuple in specialElements:
+                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+                        break
+
+    class TextPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.startTagHandler = _utils.MethodDispatcher([])
+            self.startTagHandler.default = self.startTagOther
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("script", self.endTagScript)])
+            self.endTagHandler.default = self.endTagOther
+
+        def processCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processEOF(self):
+            self.parser.parseError("expected-named-closing-tag-but-got-eof",
+                                   {"name": self.tree.openElements[-1].name})
+            self.tree.openElements.pop()
+            self.parser.phase = self.parser.originalPhase
+            return True
+
+        def startTagOther(self, token):
+            assert False, "Tried to process start tag %s in RCDATA/RAWTEXT mode" % token['name']
+
+        def endTagScript(self, token):
+            node = self.tree.openElements.pop()
+            assert node.name == "script"
+            self.parser.phase = self.parser.originalPhase
+            # The rest of this method is all stuff that only happens if
+            # document.write works
+
+        def endTagOther(self, token):
+            self.tree.openElements.pop()
+            self.parser.phase = self.parser.originalPhase
+
+    class InTablePhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-table
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("caption", self.startTagCaption),
+                ("colgroup", self.startTagColgroup),
+                ("col", self.startTagCol),
+                (("tbody", "tfoot", "thead"), self.startTagRowGroup),
+                (("td", "th", "tr"), self.startTagImplyTbody),
+                ("table", self.startTagTable),
+                (("style", "script"), self.startTagStyleScript),
+                ("input", self.startTagInput),
+                ("form", self.startTagForm)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("table", self.endTagTable),
+                (("body", "caption", "col", "colgroup", "html", "tbody", "td",
+                  "tfoot", "th", "thead", "tr"), self.endTagIgnore)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # helper methods
+        def clearStackToTableContext(self):
+            # "clear the stack back to a table context"
+            while self.tree.openElements[-1].name not in ("table", "html"):
+                # self.parser.parseError("unexpected-implied-end-tag-in-table",
+                #  {"name":  self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+            # When the current node is <html> it's an innerHTML case
+
+        # processing methods
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-table")
+            else:
+                assert self.parser.innerHTML
+            # Stop parsing
+
+        def processSpaceCharacters(self, token):
+            originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["inTableText"]
+            self.parser.phase.originalPhase = originalPhase
+            self.parser.phase.processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["inTableText"]
+            self.parser.phase.originalPhase = originalPhase
+            self.parser.phase.processCharacters(token)
+
+        def insertText(self, token):
+            # If we get here there must be at least one non-whitespace character
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processCharacters(token)
+            self.tree.insertFromTable = False
+
+        def startTagCaption(self, token):
+            self.clearStackToTableContext()
+            self.tree.activeFormattingElements.append(Marker)
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inCaption"]
+
+        def startTagColgroup(self, token):
+            self.clearStackToTableContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inColumnGroup"]
+
+        def startTagCol(self, token):
+            self.startTagColgroup(impliedTagToken("colgroup", "StartTag"))
+            return token
+
+        def startTagRowGroup(self, token):
+            self.clearStackToTableContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inTableBody"]
+
+        def startTagImplyTbody(self, token):
+            self.startTagRowGroup(impliedTagToken("tbody", "StartTag"))
+            return token
+
+        def startTagTable(self, token):
+            self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                   {"startName": "table", "endName": "table"})
+            self.parser.phase.processEndTag(impliedTagToken("table"))
+            if not self.parser.innerHTML:
+                return token
+
+        def startTagStyleScript(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagInput(self, token):
+            if ("type" in token["data"] and
+                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
+                self.parser.parseError("unexpected-hidden-input-in-table")
+                self.tree.insertElement(token)
+                # XXX associate with form
+                self.tree.openElements.pop()
+            else:
+                self.startTagOther(token)
+
+        def startTagForm(self, token):
+            self.parser.parseError("unexpected-form-in-table")
+            if self.tree.formPointer is None:
+                self.tree.insertElement(token)
+                self.tree.formPointer = self.tree.openElements[-1]
+                self.tree.openElements.pop()
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-implies-table-voodoo", {"name": token["name"]})
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processStartTag(token)
+            self.tree.insertFromTable = False
+
+        def endTagTable(self, token):
+            if self.tree.elementInScope("table", variant="table"):
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "table":
+                    self.parser.parseError("end-tag-too-early-named",
+                                           {"gotName": "table",
+                                            "expectedName": self.tree.openElements[-1].name})
+                while self.tree.openElements[-1].name != "table":
+                    self.tree.openElements.pop()
+                self.tree.openElements.pop()
+                self.parser.resetInsertionMode()
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-implies-table-voodoo", {"name": token["name"]})
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processEndTag(token)
+            self.tree.insertFromTable = False
+
+    class InTableTextPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.originalPhase = None
+            self.characterTokens = []
+
+        def flushCharacters(self):
+            data = "".join([item["data"] for item in self.characterTokens])
+            if any([item not in spaceCharacters for item in data]):
+                token = {"type": tokenTypes["Characters"], "data": data}
+                self.parser.phases["inTable"].insertText(token)
+            elif data:
+                self.tree.insertText(data)
+            self.characterTokens = []
+
+        def processComment(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+        def processEOF(self):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return True
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                return
+            self.characterTokens.append(token)
+
+        def processSpaceCharacters(self, token):
+            # pretty sure we should never reach here
+            self.characterTokens.append(token)
+    #        assert False
+
+        def processStartTag(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+        def processEndTag(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+    class InCaptionPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-caption
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
+                  "thead", "tr"), self.startTagTableElement)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("caption", self.endTagCaption),
+                ("table", self.endTagTable),
+                (("body", "col", "colgroup", "html", "tbody", "td", "tfoot", "th",
+                  "thead", "tr"), self.endTagIgnore)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def ignoreEndTagCaption(self):
+            return not self.tree.elementInScope("caption", variant="table")
+
+        def processEOF(self):
+            self.parser.phases["inBody"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inBody"].processCharacters(token)
+
+        def startTagTableElement(self, token):
+            self.parser.parseError()
+            # XXX Have to duplicate logic here to find out if the tag is ignored
+            ignoreEndTag = self.ignoreEndTagCaption()
+            self.parser.phase.processEndTag(impliedTagToken("caption"))
+            if not ignoreEndTag:
+                return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def endTagCaption(self, token):
+            if not self.ignoreEndTagCaption():
+                # AT this code is quite similar to endTagTable in "InTable"
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "caption":
+                    self.parser.parseError("expected-one-end-tag-but-got-another",
+                                           {"gotName": "caption",
+                                            "expectedName": self.tree.openElements[-1].name})
+                while self.tree.openElements[-1].name != "caption":
+                    self.tree.openElements.pop()
+                self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+                self.parser.phase = self.parser.phases["inTable"]
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagTable(self, token):
+            self.parser.parseError()
+            ignoreEndTag = self.ignoreEndTagCaption()
+            self.parser.phase.processEndTag(impliedTagToken("caption"))
+            if not ignoreEndTag:
+                return token
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inBody"].processEndTag(token)
+
+    class InColumnGroupPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-column
+
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("col", self.startTagCol)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("colgroup", self.endTagColgroup),
+                ("col", self.endTagCol)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def ignoreEndTagColgroup(self):
+            return self.tree.openElements[-1].name == "html"
+
+        def processEOF(self):
+            if self.tree.openElements[-1].name == "html":
+                assert self.parser.innerHTML
+                return
+            else:
+                ignoreEndTag = self.ignoreEndTagColgroup()
+                self.endTagColgroup(impliedTagToken("colgroup"))
+                if not ignoreEndTag:
+                    return True
+
+        def processCharacters(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+        def startTagCol(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagOther(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+        def endTagColgroup(self, token):
+            if self.ignoreEndTagColgroup():
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+            else:
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTable"]
+
+        def endTagCol(self, token):
+            self.parser.parseError("no-end-tag", {"name": "col"})
+
+        def endTagOther(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+    class InTableBodyPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-table0
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("tr", self.startTagTr),
+                (("td", "th"), self.startTagTableCell),
+                (("caption", "col", "colgroup", "tbody", "tfoot", "thead"),
+                 self.startTagTableOther)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                (("tbody", "tfoot", "thead"), self.endTagTableRowGroup),
+                ("table", self.endTagTable),
+                (("body", "caption", "col", "colgroup", "html", "td", "th",
+                  "tr"), self.endTagIgnore)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # helper methods
+        def clearStackToTableBodyContext(self):
+            while self.tree.openElements[-1].name not in ("tbody", "tfoot",
+                                                          "thead", "html"):
+                # self.parser.parseError("unexpected-implied-end-tag-in-table",
+                #  {"name": self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+            if self.tree.openElements[-1].name == "html":
+                assert self.parser.innerHTML
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inTable"].processEOF()
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inTable"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            return self.parser.phases["inTable"].processCharacters(token)
+
+        def startTagTr(self, token):
+            self.clearStackToTableBodyContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inRow"]
+
+        def startTagTableCell(self, token):
+            self.parser.parseError("unexpected-cell-in-table-body",
+                                   {"name": token["name"]})
+            self.startTagTr(impliedTagToken("tr", "StartTag"))
+            return token
+
+        def startTagTableOther(self, token):
+            # XXX AT Any ideas on how to share this with endTagTable?
+            if (self.tree.elementInScope("tbody", variant="table") or
+                self.tree.elementInScope("thead", variant="table") or
+                    self.tree.elementInScope("tfoot", variant="table")):
+                self.clearStackToTableBodyContext()
+                self.endTagTableRowGroup(
+                    impliedTagToken(self.tree.openElements[-1].name))
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def startTagOther(self, token):
+            return self.parser.phases["inTable"].processStartTag(token)
+
+        def endTagTableRowGroup(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.clearStackToTableBodyContext()
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTable"]
+            else:
+                self.parser.parseError("unexpected-end-tag-in-table-body",
+                                       {"name": token["name"]})
+
+        def endTagTable(self, token):
+            if (self.tree.elementInScope("tbody", variant="table") or
+                self.tree.elementInScope("thead", variant="table") or
+                    self.tree.elementInScope("tfoot", variant="table")):
+                self.clearStackToTableBodyContext()
+                self.endTagTableRowGroup(
+                    impliedTagToken(self.tree.openElements[-1].name))
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag-in-table-body",
+                                   {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inTable"].processEndTag(token)
+
+    class InRowPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-row
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                (("td", "th"), self.startTagTableCell),
+                (("caption", "col", "colgroup", "tbody", "tfoot", "thead",
+                  "tr"), self.startTagTableOther)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("tr", self.endTagTr),
+                ("table", self.endTagTable),
+                (("tbody", "tfoot", "thead"), self.endTagTableRowGroup),
+                (("body", "caption", "col", "colgroup", "html", "td", "th"),
+                 self.endTagIgnore)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # helper methods (XXX unify this with other table helper methods)
+        def clearStackToTableRowContext(self):
+            while self.tree.openElements[-1].name not in ("tr", "html"):
+                self.parser.parseError("unexpected-implied-end-tag-in-table-row",
+                                       {"name": self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+
+        def ignoreEndTagTr(self):
+            return not self.tree.elementInScope("tr", variant="table")
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inTable"].processEOF()
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inTable"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            return self.parser.phases["inTable"].processCharacters(token)
+
+        def startTagTableCell(self, token):
+            self.clearStackToTableRowContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inCell"]
+            self.tree.activeFormattingElements.append(Marker)
+
+        def startTagTableOther(self, token):
+            ignoreEndTag = self.ignoreEndTagTr()
+            self.endTagTr(impliedTagToken("tr"))
+            # XXX how are we sure it's always ignored in the innerHTML case?
+            if not ignoreEndTag:
+                return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inTable"].processStartTag(token)
+
+        def endTagTr(self, token):
+            if not self.ignoreEndTagTr():
+                self.clearStackToTableRowContext()
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTableBody"]
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagTable(self, token):
+            ignoreEndTag = self.ignoreEndTagTr()
+            self.endTagTr(impliedTagToken("tr"))
+            # Reprocess the current tag if the tr end tag was not ignored
+            # XXX how are we sure it's always ignored in the innerHTML case?
+            if not ignoreEndTag:
+                return token
+
+        def endTagTableRowGroup(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.endTagTr(impliedTagToken("tr"))
+                return token
+            else:
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag-in-table-row",
+                                   {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inTable"].processEndTag(token)
+
+    class InCellPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-cell
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
+                  "thead", "tr"), self.startTagTableOther)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                (("td", "th"), self.endTagTableCell),
+                (("body", "caption", "col", "colgroup", "html"), self.endTagIgnore),
+                (("table", "tbody", "tfoot", "thead", "tr"), self.endTagImply)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # helper
+        def closeCell(self):
+            if self.tree.elementInScope("td", variant="table"):
+                self.endTagTableCell(impliedTagToken("td"))
+            elif self.tree.elementInScope("th", variant="table"):
+                self.endTagTableCell(impliedTagToken("th"))
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inBody"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inBody"].processCharacters(token)
+
+        def startTagTableOther(self, token):
+            if (self.tree.elementInScope("td", variant="table") or
+                    self.tree.elementInScope("th", variant="table")):
+                self.closeCell()
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def startTagOther(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def endTagTableCell(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.tree.generateImpliedEndTags(token["name"])
+                if self.tree.openElements[-1].name != token["name"]:
+                    self.parser.parseError("unexpected-cell-end-tag",
+                                           {"name": token["name"]})
+                    while True:
+                        node = self.tree.openElements.pop()
+                        if node.name == token["name"]:
+                            break
+                else:
+                    self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+                self.parser.phase = self.parser.phases["inRow"]
+            else:
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagImply(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.closeCell()
+                return token
+            else:
+                # sometimes innerHTML case
+                self.parser.parseError()
+
+        def endTagOther(self, token):
+            return self.parser.phases["inBody"].processEndTag(token)
+
+    class InSelectPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("option", self.startTagOption),
+                ("optgroup", self.startTagOptgroup),
+                ("select", self.startTagSelect),
+                (("input", "keygen", "textarea"), self.startTagInput),
+                ("script", self.startTagScript)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("option", self.endTagOption),
+                ("optgroup", self.endTagOptgroup),
+                ("select", self.endTagSelect)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-select
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-select")
+            else:
+                assert self.parser.innerHTML
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                return
+            self.tree.insertText(token["data"])
+
+        def startTagOption(self, token):
+            # We need to imply </option> if <option> is the current node.
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagOptgroup(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            if self.tree.openElements[-1].name == "optgroup":
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagSelect(self, token):
+            self.parser.parseError("unexpected-select-in-select")
+            self.endTagSelect(impliedTagToken("select"))
+
+        def startTagInput(self, token):
+            self.parser.parseError("unexpected-input-in-select")
+            if self.tree.elementInScope("select", variant="select"):
+                self.endTagSelect(impliedTagToken("select"))
+                return token
+            else:
+                assert self.parser.innerHTML
+
+        def startTagScript(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-in-select",
+                                   {"name": token["name"]})
+
+        def endTagOption(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            else:
+                self.parser.parseError("unexpected-end-tag-in-select",
+                                       {"name": "option"})
+
+        def endTagOptgroup(self, token):
+            # </optgroup> implicitly closes <option>
+            if (self.tree.openElements[-1].name == "option" and
+                    self.tree.openElements[-2].name == "optgroup"):
+                self.tree.openElements.pop()
+            # It also closes </optgroup>
+            if self.tree.openElements[-1].name == "optgroup":
+                self.tree.openElements.pop()
+            # But nothing else
+            else:
+                self.parser.parseError("unexpected-end-tag-in-select",
+                                       {"name": "optgroup"})
+
+        def endTagSelect(self, token):
+            if self.tree.elementInScope("select", variant="select"):
+                node = self.tree.openElements.pop()
+                while node.name != "select":
+                    node = self.tree.openElements.pop()
+                self.parser.resetInsertionMode()
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-in-select",
+                                   {"name": token["name"]})
+
+    class InSelectInTablePhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
+                 self.startTagTable)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
+                 self.endTagTable)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            self.parser.phases["inSelect"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inSelect"].processCharacters(token)
+
+        def startTagTable(self, token):
+            self.parser.parseError("unexpected-table-element-start-tag-in-select-in-table", {"name": token["name"]})
+            self.endTagOther(impliedTagToken("select"))
+            return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inSelect"].processStartTag(token)
+
+        def endTagTable(self, token):
+            self.parser.parseError("unexpected-table-element-end-tag-in-select-in-table", {"name": token["name"]})
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.endTagOther(impliedTagToken("select"))
+                return token
+
+        def endTagOther(self, token):
+            return self.parser.phases["inSelect"].processEndTag(token)
+
+    class InForeignContentPhase(Phase):
+        breakoutElements = frozenset(["b", "big", "blockquote", "body", "br",
+                                      "center", "code", "dd", "div", "dl", "dt",
+                                      "em", "embed", "h1", "h2", "h3",
+                                      "h4", "h5", "h6", "head", "hr", "i", "img",
+                                      "li", "listing", "menu", "meta", "nobr",
+                                      "ol", "p", "pre", "ruby", "s", "small",
+                                      "span", "strong", "strike", "sub", "sup",
+                                      "table", "tt", "u", "ul", "var"])
+
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+        def adjustSVGTagNames(self, token):
+            replacements = {"altglyph": "altGlyph",
+                            "altglyphdef": "altGlyphDef",
+                            "altglyphitem": "altGlyphItem",
+                            "animatecolor": "animateColor",
+                            "animatemotion": "animateMotion",
+                            "animatetransform": "animateTransform",
+                            "clippath": "clipPath",
+                            "feblend": "feBlend",
+                            "fecolormatrix": "feColorMatrix",
+                            "fecomponenttransfer": "feComponentTransfer",
+                            "fecomposite": "feComposite",
+                            "feconvolvematrix": "feConvolveMatrix",
+                            "fediffuselighting": "feDiffuseLighting",
+                            "fedisplacementmap": "feDisplacementMap",
+                            "fedistantlight": "feDistantLight",
+                            "feflood": "feFlood",
+                            "fefunca": "feFuncA",
+                            "fefuncb": "feFuncB",
+                            "fefuncg": "feFuncG",
+                            "fefuncr": "feFuncR",
+                            "fegaussianblur": "feGaussianBlur",
+                            "feimage": "feImage",
+                            "femerge": "feMerge",
+                            "femergenode": "feMergeNode",
+                            "femorphology": "feMorphology",
+                            "feoffset": "feOffset",
+                            "fepointlight": "fePointLight",
+                            "fespecularlighting": "feSpecularLighting",
+                            "fespotlight": "feSpotLight",
+                            "fetile": "feTile",
+                            "feturbulence": "feTurbulence",
+                            "foreignobject": "foreignObject",
+                            "glyphref": "glyphRef",
+                            "lineargradient": "linearGradient",
+                            "radialgradient": "radialGradient",
+                            "textpath": "textPath"}
+
+            if token["name"] in replacements:
+                token["name"] = replacements[token["name"]]
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                token["data"] = "\uFFFD"
+            elif (self.parser.framesetOK and
+                  any(char not in spaceCharacters for char in token["data"])):
+                self.parser.framesetOK = False
+            Phase.processCharacters(self, token)
+
+        def processStartTag(self, token):
+            currentNode = self.tree.openElements[-1]
+            if (token["name"] in self.breakoutElements or
+                (token["name"] == "font" and
+                 set(token["data"].keys()) & set(["color", "face", "size"]))):
+                self.parser.parseError("unexpected-html-element-in-foreign-content",
+                                       {"name": token["name"]})
+                while (self.tree.openElements[-1].namespace !=
+                       self.tree.defaultNamespace and
+                       not self.parser.isHTMLIntegrationPoint(self.tree.openElements[-1]) and
+                       not self.parser.isMathMLTextIntegrationPoint(self.tree.openElements[-1])):
+                    self.tree.openElements.pop()
+                return token
+
+            else:
+                if currentNode.namespace == namespaces["mathml"]:
+                    self.parser.adjustMathMLAttributes(token)
+                elif currentNode.namespace == namespaces["svg"]:
+                    self.adjustSVGTagNames(token)
+                    self.parser.adjustSVGAttributes(token)
+                self.parser.adjustForeignAttributes(token)
+                token["namespace"] = currentNode.namespace
+                self.tree.insertElement(token)
+                if token["selfClosing"]:
+                    self.tree.openElements.pop()
+                    token["selfClosingAcknowledged"] = True
+
+        def processEndTag(self, token):
+            nodeIndex = len(self.tree.openElements) - 1
+            node = self.tree.openElements[-1]
+            if node.name.translate(asciiUpper2Lower) != token["name"]:
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+            while True:
+                if node.name.translate(asciiUpper2Lower) == token["name"]:
+                    # XXX this isn't in the spec but it seems necessary
+                    if self.parser.phase == self.parser.phases["inTableText"]:
+                        self.parser.phase.flushCharacters()
+                        self.parser.phase = self.parser.phase.originalPhase
+                    while self.tree.openElements.pop() != node:
+                        assert self.tree.openElements
+                    new_token = None
+                    break
+                nodeIndex -= 1
+
+                node = self.tree.openElements[nodeIndex]
+                if node.namespace != self.tree.defaultNamespace:
+                    continue
+                else:
+                    new_token = self.parser.phase.processEndTag(token)
+                    break
+            return new_token
+
+    class AfterBodyPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([("html", self.endTagHtml)])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            # Stop parsing
+            pass
+
+        def processComment(self, token):
+            # This is needed because data is to be appended to the <html> element
+            # here and not to whatever is currently open.
+            self.tree.insertComment(token, self.tree.openElements[0])
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-after-body")
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-after-body",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def endTagHtml(self, name):
+            if self.parser.innerHTML:
+                self.parser.parseError("unexpected-end-tag-after-body-innerhtml")
+            else:
+                self.parser.phase = self.parser.phases["afterAfterBody"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-after-body",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+    class InFramesetPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-frameset
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("frameset", self.startTagFrameset),
+                ("frame", self.startTagFrame),
+                ("noframes", self.startTagNoframes)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("frameset", self.endTagFrameset)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-frameset")
+            else:
+                assert self.parser.innerHTML
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-in-frameset")
+
+        def startTagFrameset(self, token):
+            self.tree.insertElement(token)
+
+        def startTagFrame(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+
+        def startTagNoframes(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-in-frameset",
+                                   {"name": token["name"]})
+
+        def endTagFrameset(self, token):
+            if self.tree.openElements[-1].name == "html":
+                # innerHTML case
+                self.parser.parseError("unexpected-frameset-in-frameset-innerhtml")
+            else:
+                self.tree.openElements.pop()
+            if (not self.parser.innerHTML and
+                    self.tree.openElements[-1].name != "frameset"):
+                # If we're not in innerHTML mode and the current node is not a
+                # "frameset" element (anymore) then switch.
+                self.parser.phase = self.parser.phases["afterFrameset"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-in-frameset",
+                                   {"name": token["name"]})
+
+    class AfterFramesetPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#after3
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("noframes", self.startTagNoframes)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+            self.endTagHandler = _utils.MethodDispatcher([
+                ("html", self.endTagHtml)
+            ])
+            self.endTagHandler.default = self.endTagOther
+
+        def processEOF(self):
+            # Stop parsing
+            pass
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-after-frameset")
+
+        def startTagNoframes(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-after-frameset",
+                                   {"name": token["name"]})
+
+        def endTagHtml(self, token):
+            self.parser.phase = self.parser.phases["afterAfterFrameset"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-after-frameset",
+                                   {"name": token["name"]})
+
+    class AfterAfterBodyPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+        def processEOF(self):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inBody"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-eof-but-got-char")
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("expected-eof-but-got-start-tag",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-eof-but-got-end-tag",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+    class AfterAfterFramesetPhase(Phase):
+        def __init__(self, parser, tree):
+            Phase.__init__(self, parser, tree)
+
+            self.startTagHandler = _utils.MethodDispatcher([
+                ("html", self.startTagHtml),
+                ("noframes", self.startTagNoFrames)
+            ])
+            self.startTagHandler.default = self.startTagOther
+
+        def processEOF(self):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inBody"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-eof-but-got-char")
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagNoFrames(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("expected-eof-but-got-start-tag",
+                                   {"name": token["name"]})
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-eof-but-got-end-tag",
+                                   {"name": token["name"]})
+    # pylint:enable=unused-argument
+
+    return {
+        "initial": InitialPhase,
+        "beforeHtml": BeforeHtmlPhase,
+        "beforeHead": BeforeHeadPhase,
+        "inHead": InHeadPhase,
+        "inHeadNoscript": InHeadNoscriptPhase,
+        "afterHead": AfterHeadPhase,
+        "inBody": InBodyPhase,
+        "text": TextPhase,
+        "inTable": InTablePhase,
+        "inTableText": InTableTextPhase,
+        "inCaption": InCaptionPhase,
+        "inColumnGroup": InColumnGroupPhase,
+        "inTableBody": InTableBodyPhase,
+        "inRow": InRowPhase,
+        "inCell": InCellPhase,
+        "inSelect": InSelectPhase,
+        "inSelectInTable": InSelectInTablePhase,
+        "inForeignContent": InForeignContentPhase,
+        "afterBody": AfterBodyPhase,
+        "inFrameset": InFramesetPhase,
+        "afterFrameset": AfterFramesetPhase,
+        "afterAfterBody": AfterAfterBodyPhase,
+        "afterAfterFrameset": AfterAfterFramesetPhase,
+        # XXX after after frameset
+    }
+
+
+def adjust_attributes(token, replacements):
+    needs_adjustment = viewkeys(token['data']) & viewkeys(replacements)
+    if needs_adjustment:
+        token['data'] = OrderedDict((replacements.get(k, k), v)
+                                    for k, v in token['data'].items())
+
+
+def impliedTagToken(name, type="EndTag", attributes=None,
+                    selfClosing=False):
+    if attributes is None:
+        attributes = {}
+    return {"type": tokenTypes[type], "name": name, "data": attributes,
+            "selfClosing": selfClosing}
+
+
+class ParseError(Exception):
+    """Error in parsed document"""
+    pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/serializer.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/serializer.py
new file mode 100644
index 00000000..53f4d44c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/serializer.py
@@ -0,0 +1,409 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+import re
+
+from codecs import register_error, xmlcharrefreplace_errors
+
+from .constants import voidElements, booleanAttributes, spaceCharacters
+from .constants import rcdataElements, entities, xmlEntities
+from . import treewalkers, _utils
+from xml.sax.saxutils import escape
+
+_quoteAttributeSpecChars = "".join(spaceCharacters) + "\"'=<>`"
+_quoteAttributeSpec = re.compile("[" + _quoteAttributeSpecChars + "]")
+_quoteAttributeLegacy = re.compile("[" + _quoteAttributeSpecChars +
+                                   "\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n"
+                                   "\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15"
+                                   "\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
+                                   "\x20\x2f\x60\xa0\u1680\u180e\u180f\u2000"
+                                   "\u2001\u2002\u2003\u2004\u2005\u2006\u2007"
+                                   "\u2008\u2009\u200a\u2028\u2029\u202f\u205f"
+                                   "\u3000]")
+
+
+_encode_entity_map = {}
+_is_ucs4 = len("\U0010FFFF") == 1
+for k, v in list(entities.items()):
+    # skip multi-character entities
+    if ((_is_ucs4 and len(v) > 1) or
+            (not _is_ucs4 and len(v) > 2)):
+        continue
+    if v != "&":
+        if len(v) == 2:
+            v = _utils.surrogatePairToCodepoint(v)
+        else:
+            v = ord(v)
+        if v not in _encode_entity_map or k.islower():
+            # prefer &lt; over &LT; and similarly for &amp;, &gt;, etc.
+            _encode_entity_map[v] = k
+
+
+def htmlentityreplace_errors(exc):
+    if isinstance(exc, (UnicodeEncodeError, UnicodeTranslateError)):
+        res = []
+        codepoints = []
+        skip = False
+        for i, c in enumerate(exc.object[exc.start:exc.end]):
+            if skip:
+                skip = False
+                continue
+            index = i + exc.start
+            if _utils.isSurrogatePair(exc.object[index:min([exc.end, index + 2])]):
+                codepoint = _utils.surrogatePairToCodepoint(exc.object[index:index + 2])
+                skip = True
+            else:
+                codepoint = ord(c)
+            codepoints.append(codepoint)
+        for cp in codepoints:
+            e = _encode_entity_map.get(cp)
+            if e:
+                res.append("&")
+                res.append(e)
+                if not e.endswith(";"):
+                    res.append(";")
+            else:
+                res.append("&#x%s;" % (hex(cp)[2:]))
+        return ("".join(res), exc.end)
+    else:
+        return xmlcharrefreplace_errors(exc)
+
+
+register_error("htmlentityreplace", htmlentityreplace_errors)
+
+
+def serialize(input, tree="etree", encoding=None, **serializer_opts):
+    """Serializes the input token stream using the specified treewalker
+
+    :arg input: the token stream to serialize
+
+    :arg tree: the treewalker to use
+
+    :arg encoding: the encoding to use
+
+    :arg serializer_opts: any options to pass to the
+        :py:class:`html5lib.serializer.HTMLSerializer` that gets created
+
+    :returns: the tree serialized as a string
+
+    Example:
+
+    >>> from html5lib.html5parser import parse
+    >>> from html5lib.serializer import serialize
+    >>> token_stream = parse('<html><body><p>Hi!</p></body></html>')
+    >>> serialize(token_stream, omit_optional_tags=False)
+    '<html><head></head><body><p>Hi!</p></body></html>'
+
+    """
+    # XXX: Should we cache this?
+    walker = treewalkers.getTreeWalker(tree)
+    s = HTMLSerializer(**serializer_opts)
+    return s.render(walker(input), encoding)
+
+
+class HTMLSerializer(object):
+
+    # attribute quoting options
+    quote_attr_values = "legacy"  # be secure by default
+    quote_char = '"'
+    use_best_quote_char = True
+
+    # tag syntax options
+    omit_optional_tags = True
+    minimize_boolean_attributes = True
+    use_trailing_solidus = False
+    space_before_trailing_solidus = True
+
+    # escaping options
+    escape_lt_in_attrs = False
+    escape_rcdata = False
+    resolve_entities = True
+
+    # miscellaneous options
+    alphabetical_attributes = False
+    inject_meta_charset = True
+    strip_whitespace = False
+    sanitize = False
+
+    options = ("quote_attr_values", "quote_char", "use_best_quote_char",
+               "omit_optional_tags", "minimize_boolean_attributes",
+               "use_trailing_solidus", "space_before_trailing_solidus",
+               "escape_lt_in_attrs", "escape_rcdata", "resolve_entities",
+               "alphabetical_attributes", "inject_meta_charset",
+               "strip_whitespace", "sanitize")
+
+    def __init__(self, **kwargs):
+        """Initialize HTMLSerializer
+
+        :arg inject_meta_charset: Whether or not to inject the meta charset.
+
+            Defaults to ``True``.
+
+        :arg quote_attr_values: Whether to quote attribute values that don't
+            require quoting per legacy browser behavior (``"legacy"``), when
+            required by the standard (``"spec"``), or always (``"always"``).
+
+            Defaults to ``"legacy"``.
+
+        :arg quote_char: Use given quote character for attribute quoting.
+
+            Defaults to ``"`` which will use double quotes unless attribute
+            value contains a double quote, in which case single quotes are
+            used.
+
+        :arg escape_lt_in_attrs: Whether or not to escape ``<`` in attribute
+            values.
+
+            Defaults to ``False``.
+
+        :arg escape_rcdata: Whether to escape characters that need to be
+            escaped within normal elements within rcdata elements such as
+            style.
+
+            Defaults to ``False``.
+
+        :arg resolve_entities: Whether to resolve named character entities that
+            appear in the source tree. The XML predefined entities &lt; &gt;
+            &amp; &quot; &apos; are unaffected by this setting.
+
+            Defaults to ``True``.
+
+        :arg strip_whitespace: Whether to remove semantically meaningless
+            whitespace. (This compresses all whitespace to a single space
+            except within ``pre``.)
+
+            Defaults to ``False``.
+
+        :arg minimize_boolean_attributes: Shortens boolean attributes to give
+            just the attribute value, for example::
+
+              <input disabled="disabled">
+
+            becomes::
+
+              <input disabled>
+
+            Defaults to ``True``.
+
+        :arg use_trailing_solidus: Includes a close-tag slash at the end of the
+            start tag of void elements (empty elements whose end tag is
+            forbidden). E.g. ``<hr/>``.
+
+            Defaults to ``False``.
+
+        :arg space_before_trailing_solidus: Places a space immediately before
+            the closing slash in a tag using a trailing solidus. E.g.
+            ``<hr />``. Requires ``use_trailing_solidus=True``.
+
+            Defaults to ``True``.
+
+        :arg sanitize: Strip all unsafe or unknown constructs from output.
+            See :py:class:`html5lib.filters.sanitizer.Filter`.
+
+            Defaults to ``False``.
+
+        :arg omit_optional_tags: Omit start/end tags that are optional.
+
+            Defaults to ``True``.
+
+        :arg alphabetical_attributes: Reorder attributes to be in alphabetical order.
+
+            Defaults to ``False``.
+
+        """
+        unexpected_args = frozenset(kwargs) - frozenset(self.options)
+        if len(unexpected_args) > 0:
+            raise TypeError("__init__() got an unexpected keyword argument '%s'" % next(iter(unexpected_args)))
+        if 'quote_char' in kwargs:
+            self.use_best_quote_char = False
+        for attr in self.options:
+            setattr(self, attr, kwargs.get(attr, getattr(self, attr)))
+        self.errors = []
+        self.strict = False
+
+    def encode(self, string):
+        assert(isinstance(string, text_type))
+        if self.encoding:
+            return string.encode(self.encoding, "htmlentityreplace")
+        else:
+            return string
+
+    def encodeStrict(self, string):
+        assert(isinstance(string, text_type))
+        if self.encoding:
+            return string.encode(self.encoding, "strict")
+        else:
+            return string
+
+    def serialize(self, treewalker, encoding=None):
+        # pylint:disable=too-many-nested-blocks
+        self.encoding = encoding
+        in_cdata = False
+        self.errors = []
+
+        if encoding and self.inject_meta_charset:
+            from .filters.inject_meta_charset import Filter
+            treewalker = Filter(treewalker, encoding)
+        # Alphabetical attributes is here under the assumption that none of
+        # the later filters add or change order of attributes; it needs to be
+        # before the sanitizer so escaped elements come out correctly
+        if self.alphabetical_attributes:
+            from .filters.alphabeticalattributes import Filter
+            treewalker = Filter(treewalker)
+        # WhitespaceFilter should be used before OptionalTagFilter
+        # for maximum efficiently of this latter filter
+        if self.strip_whitespace:
+            from .filters.whitespace import Filter
+            treewalker = Filter(treewalker)
+        if self.sanitize:
+            from .filters.sanitizer import Filter
+            treewalker = Filter(treewalker)
+        if self.omit_optional_tags:
+            from .filters.optionaltags import Filter
+            treewalker = Filter(treewalker)
+
+        for token in treewalker:
+            type = token["type"]
+            if type == "Doctype":
+                doctype = "<!DOCTYPE %s" % token["name"]
+
+                if token["publicId"]:
+                    doctype += ' PUBLIC "%s"' % token["publicId"]
+                elif token["systemId"]:
+                    doctype += " SYSTEM"
+                if token["systemId"]:
+                    if token["systemId"].find('"') >= 0:
+                        if token["systemId"].find("'") >= 0:
+                            self.serializeError("System identifer contains both single and double quote characters")
+                        quote_char = "'"
+                    else:
+                        quote_char = '"'
+                    doctype += " %s%s%s" % (quote_char, token["systemId"], quote_char)
+
+                doctype += ">"
+                yield self.encodeStrict(doctype)
+
+            elif type in ("Characters", "SpaceCharacters"):
+                if type == "SpaceCharacters" or in_cdata:
+                    if in_cdata and token["data"].find("</") >= 0:
+                        self.serializeError("Unexpected </ in CDATA")
+                    yield self.encode(token["data"])
+                else:
+                    yield self.encode(escape(token["data"]))
+
+            elif type in ("StartTag", "EmptyTag"):
+                name = token["name"]
+                yield self.encodeStrict("<%s" % name)
+                if name in rcdataElements and not self.escape_rcdata:
+                    in_cdata = True
+                elif in_cdata:
+                    self.serializeError("Unexpected child element of a CDATA element")
+                for (_, attr_name), attr_value in token["data"].items():
+                    # TODO: Add namespace support here
+                    k = attr_name
+                    v = attr_value
+                    yield self.encodeStrict(' ')
+
+                    yield self.encodeStrict(k)
+                    if not self.minimize_boolean_attributes or \
+                        (k not in booleanAttributes.get(name, tuple()) and
+                         k not in booleanAttributes.get("", tuple())):
+                        yield self.encodeStrict("=")
+                        if self.quote_attr_values == "always" or len(v) == 0:
+                            quote_attr = True
+                        elif self.quote_attr_values == "spec":
+                            quote_attr = _quoteAttributeSpec.search(v) is not None
+                        elif self.quote_attr_values == "legacy":
+                            quote_attr = _quoteAttributeLegacy.search(v) is not None
+                        else:
+                            raise ValueError("quote_attr_values must be one of: "
+                                             "'always', 'spec', or 'legacy'")
+                        v = v.replace("&", "&amp;")
+                        if self.escape_lt_in_attrs:
+                            v = v.replace("<", "&lt;")
+                        if quote_attr:
+                            quote_char = self.quote_char
+                            if self.use_best_quote_char:
+                                if "'" in v and '"' not in v:
+                                    quote_char = '"'
+                                elif '"' in v and "'" not in v:
+                                    quote_char = "'"
+                            if quote_char == "'":
+                                v = v.replace("'", "&#39;")
+                            else:
+                                v = v.replace('"', "&quot;")
+                            yield self.encodeStrict(quote_char)
+                            yield self.encode(v)
+                            yield self.encodeStrict(quote_char)
+                        else:
+                            yield self.encode(v)
+                if name in voidElements and self.use_trailing_solidus:
+                    if self.space_before_trailing_solidus:
+                        yield self.encodeStrict(" /")
+                    else:
+                        yield self.encodeStrict("/")
+                yield self.encode(">")
+
+            elif type == "EndTag":
+                name = token["name"]
+                if name in rcdataElements:
+                    in_cdata = False
+                elif in_cdata:
+                    self.serializeError("Unexpected child element of a CDATA element")
+                yield self.encodeStrict("</%s>" % name)
+
+            elif type == "Comment":
+                data = token["data"]
+                if data.find("--") >= 0:
+                    self.serializeError("Comment contains --")
+                yield self.encodeStrict("<!--%s-->" % token["data"])
+
+            elif type == "Entity":
+                name = token["name"]
+                key = name + ";"
+                if key not in entities:
+                    self.serializeError("Entity %s not recognized" % name)
+                if self.resolve_entities and key not in xmlEntities:
+                    data = entities[key]
+                else:
+                    data = "&%s;" % name
+                yield self.encodeStrict(data)
+
+            else:
+                self.serializeError(token["data"])
+
+    def render(self, treewalker, encoding=None):
+        """Serializes the stream from the treewalker into a string
+
+        :arg treewalker: the treewalker to serialize
+
+        :arg encoding: the string encoding to use
+
+        :returns: the serialized tree
+
+        Example:
+
+        >>> from html5lib import parse, getTreeWalker
+        >>> from html5lib.serializer import HTMLSerializer
+        >>> token_stream = parse('<html><body>Hi!</body></html>')
+        >>> walker = getTreeWalker('etree')
+        >>> serializer = HTMLSerializer(omit_optional_tags=False)
+        >>> serializer.render(walker(token_stream))
+        '<html><head></head><body>Hi!</body></html>'
+
+        """
+        if encoding:
+            return b"".join(list(self.serialize(treewalker, encoding)))
+        else:
+            return "".join(list(self.serialize(treewalker)))
+
+    def serializeError(self, data="XXX ERROR MESSAGE NEEDED"):
+        # XXX The idea is to make data mandatory.
+        self.errors.append(data)
+        if self.strict:
+            raise SerializeError
+
+
+class SerializeError(Exception):
+    """Error in serialized tree"""
+    pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py
new file mode 100644
index 00000000..7ef59590
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py
@@ -0,0 +1,30 @@
+"""Tree adapters let you convert from one tree structure to another
+
+Example:
+
+.. code-block:: python
+
+   from pip._vendor import html5lib
+   from pip._vendor.html5lib.treeadapters import genshi
+
+   doc = '<html><body>Hi!</body></html>'
+   treebuilder = html5lib.getTreeBuilder('etree')
+   parser = html5lib.HTMLParser(tree=treebuilder)
+   tree = parser.parse(doc)
+   TreeWalker = html5lib.getTreeWalker('etree')
+
+   genshi_tree = genshi.to_genshi(TreeWalker(tree))
+
+"""
+from __future__ import absolute_import, division, unicode_literals
+
+from . import sax
+
+__all__ = ["sax"]
+
+try:
+    from . import genshi  # noqa
+except ImportError:
+    pass
+else:
+    __all__.append("genshi")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..6d4ae732
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/genshi.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/genshi.cpython-37.pyc
new file mode 100644
index 00000000..30c93203
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/genshi.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/sax.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/sax.cpython-37.pyc
new file mode 100644
index 00000000..c3567384
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/sax.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py
new file mode 100644
index 00000000..61d5fb6a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py
@@ -0,0 +1,54 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from genshi.core import QName, Attrs
+from genshi.core import START, END, TEXT, COMMENT, DOCTYPE
+
+
+def to_genshi(walker):
+    """Convert a tree to a genshi tree
+
+    :arg walker: the treewalker to use to walk the tree to convert it
+
+    :returns: generator of genshi nodes
+
+    """
+    text = []
+    for token in walker:
+        type = token["type"]
+        if type in ("Characters", "SpaceCharacters"):
+            text.append(token["data"])
+        elif text:
+            yield TEXT, "".join(text), (None, -1, -1)
+            text = []
+
+        if type in ("StartTag", "EmptyTag"):
+            if token["namespace"]:
+                name = "{%s}%s" % (token["namespace"], token["name"])
+            else:
+                name = token["name"]
+            attrs = Attrs([(QName("{%s}%s" % attr if attr[0] is not None else attr[1]), value)
+                           for attr, value in token["data"].items()])
+            yield (START, (QName(name), attrs), (None, -1, -1))
+            if type == "EmptyTag":
+                type = "EndTag"
+
+        if type == "EndTag":
+            if token["namespace"]:
+                name = "{%s}%s" % (token["namespace"], token["name"])
+            else:
+                name = token["name"]
+
+            yield END, QName(name), (None, -1, -1)
+
+        elif type == "Comment":
+            yield COMMENT, token["data"], (None, -1, -1)
+
+        elif type == "Doctype":
+            yield DOCTYPE, (token["name"], token["publicId"],
+                            token["systemId"]), (None, -1, -1)
+
+        else:
+            pass  # FIXME: What to do?
+
+    if text:
+        yield TEXT, "".join(text), (None, -1, -1)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/sax.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/sax.py
new file mode 100644
index 00000000..f4ccea5a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treeadapters/sax.py
@@ -0,0 +1,50 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.sax.xmlreader import AttributesNSImpl
+
+from ..constants import adjustForeignAttributes, unadjustForeignAttributes
+
+prefix_mapping = {}
+for prefix, localName, namespace in adjustForeignAttributes.values():
+    if prefix is not None:
+        prefix_mapping[prefix] = namespace
+
+
+def to_sax(walker, handler):
+    """Call SAX-like content handler based on treewalker walker
+
+    :arg walker: the treewalker to use to walk the tree to convert it
+
+    :arg handler: SAX handler to use
+
+    """
+    handler.startDocument()
+    for prefix, namespace in prefix_mapping.items():
+        handler.startPrefixMapping(prefix, namespace)
+
+    for token in walker:
+        type = token["type"]
+        if type == "Doctype":
+            continue
+        elif type in ("StartTag", "EmptyTag"):
+            attrs = AttributesNSImpl(token["data"],
+                                     unadjustForeignAttributes)
+            handler.startElementNS((token["namespace"], token["name"]),
+                                   token["name"],
+                                   attrs)
+            if type == "EmptyTag":
+                handler.endElementNS((token["namespace"], token["name"]),
+                                     token["name"])
+        elif type == "EndTag":
+            handler.endElementNS((token["namespace"], token["name"]),
+                                 token["name"])
+        elif type in ("Characters", "SpaceCharacters"):
+            handler.characters(token["data"])
+        elif type == "Comment":
+            pass
+        else:
+            assert False, "Unknown token type"
+
+    for prefix, namespace in prefix_mapping.items():
+        handler.endPrefixMapping(prefix)
+    handler.endDocument()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py
new file mode 100644
index 00000000..d44447ea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py
@@ -0,0 +1,88 @@
+"""A collection of modules for building different kinds of trees from HTML
+documents.
+
+To create a treebuilder for a new type of tree, you need to do
+implement several things:
+
+1. A set of classes for various types of elements: Document, Doctype, Comment,
+   Element. These must implement the interface of ``base.treebuilders.Node``
+   (although comment nodes have a different signature for their constructor,
+   see ``treebuilders.etree.Comment``) Textual content may also be implemented
+   as another node type, or not, as your tree implementation requires.
+
+2. A treebuilder object (called ``TreeBuilder`` by convention) that inherits
+   from ``treebuilders.base.TreeBuilder``. This has 4 required attributes:
+
+   * ``documentClass`` - the class to use for the bottommost node of a document
+   * ``elementClass`` - the class to use for HTML Elements
+   * ``commentClass`` - the class to use for comments
+   * ``doctypeClass`` - the class to use for doctypes
+
+   It also has one required method:
+
+   * ``getDocument`` - Returns the root node of the complete document tree
+
+3. If you wish to run the unit tests, you must also create a ``testSerializer``
+   method on your treebuilder which accepts a node and returns a string
+   containing Node and its children serialized according to the format used in
+   the unittests
+
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .._utils import default_etree
+
+treeBuilderCache = {}
+
+
+def getTreeBuilder(treeType, implementation=None, **kwargs):
+    """Get a TreeBuilder class for various types of trees with built-in support
+
+    :arg treeType: the name of the tree type required (case-insensitive). Supported
+        values are:
+
+        * "dom" - A generic builder for DOM implementations, defaulting to a
+          xml.dom.minidom based implementation.
+        * "etree" - A generic builder for tree implementations exposing an
+          ElementTree-like interface, defaulting to xml.etree.cElementTree if
+          available and xml.etree.ElementTree if not.
+        * "lxml" - A etree-based builder for lxml.etree, handling limitations
+          of lxml's implementation.
+
+    :arg implementation: (Currently applies to the "etree" and "dom" tree
+        types). A module implementing the tree type e.g. xml.etree.ElementTree
+        or xml.etree.cElementTree.
+
+    :arg kwargs: Any additional options to pass to the TreeBuilder when
+        creating it.
+
+    Example:
+
+    >>> from html5lib.treebuilders import getTreeBuilder
+    >>> builder = getTreeBuilder('etree')
+
+    """
+
+    treeType = treeType.lower()
+    if treeType not in treeBuilderCache:
+        if treeType == "dom":
+            from . import dom
+            # Come up with a sane default (pref. from the stdlib)
+            if implementation is None:
+                from xml.dom import minidom
+                implementation = minidom
+            # NEVER cache here, caching is done in the dom submodule
+            return dom.getDomModule(implementation, **kwargs).TreeBuilder
+        elif treeType == "lxml":
+            from . import etree_lxml
+            treeBuilderCache[treeType] = etree_lxml.TreeBuilder
+        elif treeType == "etree":
+            from . import etree
+            if implementation is None:
+                implementation = default_etree
+            # NEVER cache here, caching is done in the etree submodule
+            return etree.getETreeModule(implementation, **kwargs).TreeBuilder
+        else:
+            raise ValueError("""Unrecognised treebuilder "%s" """ % treeType)
+    return treeBuilderCache.get(treeType)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..4160076a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/base.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/base.cpython-37.pyc
new file mode 100644
index 00000000..f3290210
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/base.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/dom.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/dom.cpython-37.pyc
new file mode 100644
index 00000000..9e461bea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/dom.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree.cpython-37.pyc
new file mode 100644
index 00000000..bd7bceb3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree_lxml.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree_lxml.cpython-37.pyc
new file mode 100644
index 00000000..8aa7773e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/__pycache__/etree_lxml.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/base.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/base.py
new file mode 100644
index 00000000..73973db5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/base.py
@@ -0,0 +1,417 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from ..constants import scopingElements, tableInsertModeElements, namespaces
+
+# The scope markers are inserted when entering object elements,
+# marquees, table cells, and table captions, and are used to prevent formatting
+# from "leaking" into tables, object elements, and marquees.
+Marker = None
+
+listElementsMap = {
+    None: (frozenset(scopingElements), False),
+    "button": (frozenset(scopingElements | set([(namespaces["html"], "button")])), False),
+    "list": (frozenset(scopingElements | set([(namespaces["html"], "ol"),
+                                              (namespaces["html"], "ul")])), False),
+    "table": (frozenset([(namespaces["html"], "html"),
+                         (namespaces["html"], "table")]), False),
+    "select": (frozenset([(namespaces["html"], "optgroup"),
+                          (namespaces["html"], "option")]), True)
+}
+
+
+class Node(object):
+    """Represents an item in the tree"""
+    def __init__(self, name):
+        """Creates a Node
+
+        :arg name: The tag name associated with the node
+
+        """
+        # The tag name assocaited with the node
+        self.name = name
+        # The parent of the current node (or None for the document node)
+        self.parent = None
+        # The value of the current node (applies to text nodes and comments)
+        self.value = None
+        # A dict holding name -> value pairs for attributes of the node
+        self.attributes = {}
+        # A list of child nodes of the current node. This must include all
+        # elements but not necessarily other node types.
+        self.childNodes = []
+        # A list of miscellaneous flags that can be set on the node.
+        self._flags = []
+
+    def __str__(self):
+        attributesStr = " ".join(["%s=\"%s\"" % (name, value)
+                                  for name, value in
+                                  self.attributes.items()])
+        if attributesStr:
+            return "<%s %s>" % (self.name, attributesStr)
+        else:
+            return "<%s>" % (self.name)
+
+    def __repr__(self):
+        return "<%s>" % (self.name)
+
+    def appendChild(self, node):
+        """Insert node as a child of the current node
+
+        :arg node: the node to insert
+
+        """
+        raise NotImplementedError
+
+    def insertText(self, data, insertBefore=None):
+        """Insert data as text in the current node, positioned before the
+        start of node insertBefore or to the end of the node's text.
+
+        :arg data: the data to insert
+
+        :arg insertBefore: True if you want to insert the text before the node
+            and False if you want to insert it after the node
+
+        """
+        raise NotImplementedError
+
+    def insertBefore(self, node, refNode):
+        """Insert node as a child of the current node, before refNode in the
+        list of child nodes. Raises ValueError if refNode is not a child of
+        the current node
+
+        :arg node: the node to insert
+
+        :arg refNode: the child node to insert the node before
+
+        """
+        raise NotImplementedError
+
+    def removeChild(self, node):
+        """Remove node from the children of the current node
+
+        :arg node: the child node to remove
+
+        """
+        raise NotImplementedError
+
+    def reparentChildren(self, newParent):
+        """Move all the children of the current node to newParent.
+        This is needed so that trees that don't store text as nodes move the
+        text in the correct way
+
+        :arg newParent: the node to move all this node's children to
+
+        """
+        # XXX - should this method be made more general?
+        for child in self.childNodes:
+            newParent.appendChild(child)
+        self.childNodes = []
+
+    def cloneNode(self):
+        """Return a shallow copy of the current node i.e. a node with the same
+        name and attributes but with no parent or child nodes
+        """
+        raise NotImplementedError
+
+    def hasContent(self):
+        """Return true if the node has children or text, false otherwise
+        """
+        raise NotImplementedError
+
+
+class ActiveFormattingElements(list):
+    def append(self, node):
+        equalCount = 0
+        if node != Marker:
+            for element in self[::-1]:
+                if element == Marker:
+                    break
+                if self.nodesEqual(element, node):
+                    equalCount += 1
+                if equalCount == 3:
+                    self.remove(element)
+                    break
+        list.append(self, node)
+
+    def nodesEqual(self, node1, node2):
+        if not node1.nameTuple == node2.nameTuple:
+            return False
+
+        if not node1.attributes == node2.attributes:
+            return False
+
+        return True
+
+
+class TreeBuilder(object):
+    """Base treebuilder implementation
+
+    * documentClass - the class to use for the bottommost node of a document
+    * elementClass - the class to use for HTML Elements
+    * commentClass - the class to use for comments
+    * doctypeClass - the class to use for doctypes
+
+    """
+    # pylint:disable=not-callable
+
+    # Document class
+    documentClass = None
+
+    # The class to use for creating a node
+    elementClass = None
+
+    # The class to use for creating comments
+    commentClass = None
+
+    # The class to use for creating doctypes
+    doctypeClass = None
+
+    # Fragment class
+    fragmentClass = None
+
+    def __init__(self, namespaceHTMLElements):
+        """Create a TreeBuilder
+
+        :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+        """
+        if namespaceHTMLElements:
+            self.defaultNamespace = "http://www.w3.org/1999/xhtml"
+        else:
+            self.defaultNamespace = None
+        self.reset()
+
+    def reset(self):
+        self.openElements = []
+        self.activeFormattingElements = ActiveFormattingElements()
+
+        # XXX - rename these to headElement, formElement
+        self.headPointer = None
+        self.formPointer = None
+
+        self.insertFromTable = False
+
+        self.document = self.documentClass()
+
+    def elementInScope(self, target, variant=None):
+
+        # If we pass a node in we match that. if we pass a string
+        # match any node with that name
+        exactNode = hasattr(target, "nameTuple")
+        if not exactNode:
+            if isinstance(target, text_type):
+                target = (namespaces["html"], target)
+            assert isinstance(target, tuple)
+
+        listElements, invert = listElementsMap[variant]
+
+        for node in reversed(self.openElements):
+            if exactNode and node == target:
+                return True
+            elif not exactNode and node.nameTuple == target:
+                return True
+            elif (invert ^ (node.nameTuple in listElements)):
+                return False
+
+        assert False  # We should never reach this point
+
+    def reconstructActiveFormattingElements(self):
+        # Within this algorithm the order of steps described in the
+        # specification is not quite the same as the order of steps in the
+        # code. It should still do the same though.
+
+        # Step 1: stop the algorithm when there's nothing to do.
+        if not self.activeFormattingElements:
+            return
+
+        # Step 2 and step 3: we start with the last element. So i is -1.
+        i = len(self.activeFormattingElements) - 1
+        entry = self.activeFormattingElements[i]
+        if entry == Marker or entry in self.openElements:
+            return
+
+        # Step 6
+        while entry != Marker and entry not in self.openElements:
+            if i == 0:
+                # This will be reset to 0 below
+                i = -1
+                break
+            i -= 1
+            # Step 5: let entry be one earlier in the list.
+            entry = self.activeFormattingElements[i]
+
+        while True:
+            # Step 7
+            i += 1
+
+            # Step 8
+            entry = self.activeFormattingElements[i]
+            clone = entry.cloneNode()  # Mainly to get a new copy of the attributes
+
+            # Step 9
+            element = self.insertElement({"type": "StartTag",
+                                          "name": clone.name,
+                                          "namespace": clone.namespace,
+                                          "data": clone.attributes})
+
+            # Step 10
+            self.activeFormattingElements[i] = element
+
+            # Step 11
+            if element == self.activeFormattingElements[-1]:
+                break
+
+    def clearActiveFormattingElements(self):
+        entry = self.activeFormattingElements.pop()
+        while self.activeFormattingElements and entry != Marker:
+            entry = self.activeFormattingElements.pop()
+
+    def elementInActiveFormattingElements(self, name):
+        """Check if an element exists between the end of the active
+        formatting elements and the last marker. If it does, return it, else
+        return false"""
+
+        for item in self.activeFormattingElements[::-1]:
+            # Check for Marker first because if it's a Marker it doesn't have a
+            # name attribute.
+            if item == Marker:
+                break
+            elif item.name == name:
+                return item
+        return False
+
+    def insertRoot(self, token):
+        element = self.createElement(token)
+        self.openElements.append(element)
+        self.document.appendChild(element)
+
+    def insertDoctype(self, token):
+        name = token["name"]
+        publicId = token["publicId"]
+        systemId = token["systemId"]
+
+        doctype = self.doctypeClass(name, publicId, systemId)
+        self.document.appendChild(doctype)
+
+    def insertComment(self, token, parent=None):
+        if parent is None:
+            parent = self.openElements[-1]
+        parent.appendChild(self.commentClass(token["data"]))
+
+    def createElement(self, token):
+        """Create an element but don't insert it anywhere"""
+        name = token["name"]
+        namespace = token.get("namespace", self.defaultNamespace)
+        element = self.elementClass(name, namespace)
+        element.attributes = token["data"]
+        return element
+
+    def _getInsertFromTable(self):
+        return self._insertFromTable
+
+    def _setInsertFromTable(self, value):
+        """Switch the function used to insert an element from the
+        normal one to the misnested table one and back again"""
+        self._insertFromTable = value
+        if value:
+            self.insertElement = self.insertElementTable
+        else:
+            self.insertElement = self.insertElementNormal
+
+    insertFromTable = property(_getInsertFromTable, _setInsertFromTable)
+
+    def insertElementNormal(self, token):
+        name = token["name"]
+        assert isinstance(name, text_type), "Element %s not unicode" % name
+        namespace = token.get("namespace", self.defaultNamespace)
+        element = self.elementClass(name, namespace)
+        element.attributes = token["data"]
+        self.openElements[-1].appendChild(element)
+        self.openElements.append(element)
+        return element
+
+    def insertElementTable(self, token):
+        """Create an element and insert it into the tree"""
+        element = self.createElement(token)
+        if self.openElements[-1].name not in tableInsertModeElements:
+            return self.insertElementNormal(token)
+        else:
+            # We should be in the InTable mode. This means we want to do
+            # special magic element rearranging
+            parent, insertBefore = self.getTableMisnestedNodePosition()
+            if insertBefore is None:
+                parent.appendChild(element)
+            else:
+                parent.insertBefore(element, insertBefore)
+            self.openElements.append(element)
+        return element
+
+    def insertText(self, data, parent=None):
+        """Insert text data."""
+        if parent is None:
+            parent = self.openElements[-1]
+
+        if (not self.insertFromTable or (self.insertFromTable and
+                                         self.openElements[-1].name
+                                         not in tableInsertModeElements)):
+            parent.insertText(data)
+        else:
+            # We should be in the InTable mode. This means we want to do
+            # special magic element rearranging
+            parent, insertBefore = self.getTableMisnestedNodePosition()
+            parent.insertText(data, insertBefore)
+
+    def getTableMisnestedNodePosition(self):
+        """Get the foster parent element, and sibling to insert before
+        (or None) when inserting a misnested table node"""
+        # The foster parent element is the one which comes before the most
+        # recently opened table element
+        # XXX - this is really inelegant
+        lastTable = None
+        fosterParent = None
+        insertBefore = None
+        for elm in self.openElements[::-1]:
+            if elm.name == "table":
+                lastTable = elm
+                break
+        if lastTable:
+            # XXX - we should really check that this parent is actually a
+            # node here
+            if lastTable.parent:
+                fosterParent = lastTable.parent
+                insertBefore = lastTable
+            else:
+                fosterParent = self.openElements[
+                    self.openElements.index(lastTable) - 1]
+        else:
+            fosterParent = self.openElements[0]
+        return fosterParent, insertBefore
+
+    def generateImpliedEndTags(self, exclude=None):
+        name = self.openElements[-1].name
+        # XXX td, th and tr are not actually needed
+        if (name in frozenset(("dd", "dt", "li", "option", "optgroup", "p", "rp", "rt")) and
+                name != exclude):
+            self.openElements.pop()
+            # XXX This is not entirely what the specification says. We should
+            # investigate it more closely.
+            self.generateImpliedEndTags(exclude)
+
+    def getDocument(self):
+        """Return the final tree"""
+        return self.document
+
+    def getFragment(self):
+        """Return the final fragment"""
+        # assert self.innerHTML
+        fragment = self.fragmentClass()
+        self.openElements[0].reparentChildren(fragment)
+        return fragment
+
+    def testSerializer(self, node):
+        """Serialize the subtree of node in the format required by unit tests
+
+        :arg node: the node from which to start serializing
+
+        """
+        raise NotImplementedError
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/dom.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/dom.py
new file mode 100644
index 00000000..d8b53004
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/dom.py
@@ -0,0 +1,239 @@
+from __future__ import absolute_import, division, unicode_literals
+
+
+try:
+    from collections.abc import MutableMapping
+except ImportError:  # Python 2.7
+    from collections import MutableMapping
+from xml.dom import minidom, Node
+import weakref
+
+from . import base
+from .. import constants
+from ..constants import namespaces
+from .._utils import moduleFactoryFactory
+
+
+def getDomBuilder(DomImplementation):
+    Dom = DomImplementation
+
+    class AttrList(MutableMapping):
+        def __init__(self, element):
+            self.element = element
+
+        def __iter__(self):
+            return iter(self.element.attributes.keys())
+
+        def __setitem__(self, name, value):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                attr = self.element.ownerDocument.createAttribute(name)
+                attr.value = value
+                self.element.attributes[name] = attr
+
+        def __len__(self):
+            return len(self.element.attributes)
+
+        def items(self):
+            return list(self.element.attributes.items())
+
+        def values(self):
+            return list(self.element.attributes.values())
+
+        def __getitem__(self, name):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                return self.element.attributes[name].value
+
+        def __delitem__(self, name):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                del self.element.attributes[name]
+
+    class NodeBuilder(base.Node):
+        def __init__(self, element):
+            base.Node.__init__(self, element.nodeName)
+            self.element = element
+
+        namespace = property(lambda self: hasattr(self.element, "namespaceURI") and
+                             self.element.namespaceURI or None)
+
+        def appendChild(self, node):
+            node.parent = self
+            self.element.appendChild(node.element)
+
+        def insertText(self, data, insertBefore=None):
+            text = self.element.ownerDocument.createTextNode(data)
+            if insertBefore:
+                self.element.insertBefore(text, insertBefore.element)
+            else:
+                self.element.appendChild(text)
+
+        def insertBefore(self, node, refNode):
+            self.element.insertBefore(node.element, refNode.element)
+            node.parent = self
+
+        def removeChild(self, node):
+            if node.element.parentNode == self.element:
+                self.element.removeChild(node.element)
+            node.parent = None
+
+        def reparentChildren(self, newParent):
+            while self.element.hasChildNodes():
+                child = self.element.firstChild
+                self.element.removeChild(child)
+                newParent.element.appendChild(child)
+            self.childNodes = []
+
+        def getAttributes(self):
+            return AttrList(self.element)
+
+        def setAttributes(self, attributes):
+            if attributes:
+                for name, value in list(attributes.items()):
+                    if isinstance(name, tuple):
+                        if name[0] is not None:
+                            qualifiedName = (name[0] + ":" + name[1])
+                        else:
+                            qualifiedName = name[1]
+                        self.element.setAttributeNS(name[2], qualifiedName,
+                                                    value)
+                    else:
+                        self.element.setAttribute(
+                            name, value)
+        attributes = property(getAttributes, setAttributes)
+
+        def cloneNode(self):
+            return NodeBuilder(self.element.cloneNode(False))
+
+        def hasContent(self):
+            return self.element.hasChildNodes()
+
+        def getNameTuple(self):
+            if self.namespace is None:
+                return namespaces["html"], self.name
+            else:
+                return self.namespace, self.name
+
+        nameTuple = property(getNameTuple)
+
+    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
+        def documentClass(self):
+            self.dom = Dom.getDOMImplementation().createDocument(None, None, None)
+            return weakref.proxy(self)
+
+        def insertDoctype(self, token):
+            name = token["name"]
+            publicId = token["publicId"]
+            systemId = token["systemId"]
+
+            domimpl = Dom.getDOMImplementation()
+            doctype = domimpl.createDocumentType(name, publicId, systemId)
+            self.document.appendChild(NodeBuilder(doctype))
+            if Dom == minidom:
+                doctype.ownerDocument = self.dom
+
+        def elementClass(self, name, namespace=None):
+            if namespace is None and self.defaultNamespace is None:
+                node = self.dom.createElement(name)
+            else:
+                node = self.dom.createElementNS(namespace, name)
+
+            return NodeBuilder(node)
+
+        def commentClass(self, data):
+            return NodeBuilder(self.dom.createComment(data))
+
+        def fragmentClass(self):
+            return NodeBuilder(self.dom.createDocumentFragment())
+
+        def appendChild(self, node):
+            self.dom.appendChild(node.element)
+
+        def testSerializer(self, element):
+            return testSerializer(element)
+
+        def getDocument(self):
+            return self.dom
+
+        def getFragment(self):
+            return base.TreeBuilder.getFragment(self).element
+
+        def insertText(self, data, parent=None):
+            data = data
+            if parent != self:
+                base.TreeBuilder.insertText(self, data, parent)
+            else:
+                # HACK: allow text nodes as children of the document node
+                if hasattr(self.dom, '_child_node_types'):
+                    # pylint:disable=protected-access
+                    if Node.TEXT_NODE not in self.dom._child_node_types:
+                        self.dom._child_node_types = list(self.dom._child_node_types)
+                        self.dom._child_node_types.append(Node.TEXT_NODE)
+                self.dom.appendChild(self.dom.createTextNode(data))
+
+        implementation = DomImplementation
+        name = None
+
+    def testSerializer(element):
+        element.normalize()
+        rv = []
+
+        def serializeElement(element, indent=0):
+            if element.nodeType == Node.DOCUMENT_TYPE_NODE:
+                if element.name:
+                    if element.publicId or element.systemId:
+                        publicId = element.publicId or ""
+                        systemId = element.systemId or ""
+                        rv.append("""|%s<!DOCTYPE %s "%s" "%s">""" %
+                                  (' ' * indent, element.name, publicId, systemId))
+                    else:
+                        rv.append("|%s<!DOCTYPE %s>" % (' ' * indent, element.name))
+                else:
+                    rv.append("|%s<!DOCTYPE >" % (' ' * indent,))
+            elif element.nodeType == Node.DOCUMENT_NODE:
+                rv.append("#document")
+            elif element.nodeType == Node.DOCUMENT_FRAGMENT_NODE:
+                rv.append("#document-fragment")
+            elif element.nodeType == Node.COMMENT_NODE:
+                rv.append("|%s<!-- %s -->" % (' ' * indent, element.nodeValue))
+            elif element.nodeType == Node.TEXT_NODE:
+                rv.append("|%s\"%s\"" % (' ' * indent, element.nodeValue))
+            else:
+                if (hasattr(element, "namespaceURI") and
+                        element.namespaceURI is not None):
+                    name = "%s %s" % (constants.prefixes[element.namespaceURI],
+                                      element.nodeName)
+                else:
+                    name = element.nodeName
+                rv.append("|%s<%s>" % (' ' * indent, name))
+                if element.hasAttributes():
+                    attributes = []
+                    for i in range(len(element.attributes)):
+                        attr = element.attributes.item(i)
+                        name = attr.nodeName
+                        value = attr.value
+                        ns = attr.namespaceURI
+                        if ns:
+                            name = "%s %s" % (constants.prefixes[ns], attr.localName)
+                        else:
+                            name = attr.nodeName
+                        attributes.append((name, value))
+
+                    for name, value in sorted(attributes):
+                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+            indent += 2
+            for child in element.childNodes:
+                serializeElement(child, indent)
+        serializeElement(element, 0)
+
+        return "\n".join(rv)
+
+    return locals()
+
+
+# The actual means to get a module!
+getDomModule = moduleFactoryFactory(getDomBuilder)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree.py
new file mode 100644
index 00000000..0dedf441
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree.py
@@ -0,0 +1,340 @@
+from __future__ import absolute_import, division, unicode_literals
+# pylint:disable=protected-access
+
+from pip._vendor.six import text_type
+
+import re
+
+from . import base
+from .. import _ihatexml
+from .. import constants
+from ..constants import namespaces
+from .._utils import moduleFactoryFactory
+
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+
+def getETreeBuilder(ElementTreeImplementation, fullTree=False):
+    ElementTree = ElementTreeImplementation
+    ElementTreeCommentType = ElementTree.Comment("asd").tag
+
+    class Element(base.Node):
+        def __init__(self, name, namespace=None):
+            self._name = name
+            self._namespace = namespace
+            self._element = ElementTree.Element(self._getETreeTag(name,
+                                                                  namespace))
+            if namespace is None:
+                self.nameTuple = namespaces["html"], self._name
+            else:
+                self.nameTuple = self._namespace, self._name
+            self.parent = None
+            self._childNodes = []
+            self._flags = []
+
+        def _getETreeTag(self, name, namespace):
+            if namespace is None:
+                etree_tag = name
+            else:
+                etree_tag = "{%s}%s" % (namespace, name)
+            return etree_tag
+
+        def _setName(self, name):
+            self._name = name
+            self._element.tag = self._getETreeTag(self._name, self._namespace)
+
+        def _getName(self):
+            return self._name
+
+        name = property(_getName, _setName)
+
+        def _setNamespace(self, namespace):
+            self._namespace = namespace
+            self._element.tag = self._getETreeTag(self._name, self._namespace)
+
+        def _getNamespace(self):
+            return self._namespace
+
+        namespace = property(_getNamespace, _setNamespace)
+
+        def _getAttributes(self):
+            return self._element.attrib
+
+        def _setAttributes(self, attributes):
+            # Delete existing attributes first
+            # XXX - there may be a better way to do this...
+            for key in list(self._element.attrib.keys()):
+                del self._element.attrib[key]
+            for key, value in attributes.items():
+                if isinstance(key, tuple):
+                    name = "{%s}%s" % (key[2], key[1])
+                else:
+                    name = key
+                self._element.set(name, value)
+
+        attributes = property(_getAttributes, _setAttributes)
+
+        def _getChildNodes(self):
+            return self._childNodes
+
+        def _setChildNodes(self, value):
+            del self._element[:]
+            self._childNodes = []
+            for element in value:
+                self.insertChild(element)
+
+        childNodes = property(_getChildNodes, _setChildNodes)
+
+        def hasContent(self):
+            """Return true if the node has children or text"""
+            return bool(self._element.text or len(self._element))
+
+        def appendChild(self, node):
+            self._childNodes.append(node)
+            self._element.append(node._element)
+            node.parent = self
+
+        def insertBefore(self, node, refNode):
+            index = list(self._element).index(refNode._element)
+            self._element.insert(index, node._element)
+            node.parent = self
+
+        def removeChild(self, node):
+            self._childNodes.remove(node)
+            self._element.remove(node._element)
+            node.parent = None
+
+        def insertText(self, data, insertBefore=None):
+            if not(len(self._element)):
+                if not self._element.text:
+                    self._element.text = ""
+                self._element.text += data
+            elif insertBefore is None:
+                # Insert the text as the tail of the last child element
+                if not self._element[-1].tail:
+                    self._element[-1].tail = ""
+                self._element[-1].tail += data
+            else:
+                # Insert the text before the specified node
+                children = list(self._element)
+                index = children.index(insertBefore._element)
+                if index > 0:
+                    if not self._element[index - 1].tail:
+                        self._element[index - 1].tail = ""
+                    self._element[index - 1].tail += data
+                else:
+                    if not self._element.text:
+                        self._element.text = ""
+                    self._element.text += data
+
+        def cloneNode(self):
+            element = type(self)(self.name, self.namespace)
+            for name, value in self.attributes.items():
+                element.attributes[name] = value
+            return element
+
+        def reparentChildren(self, newParent):
+            if newParent.childNodes:
+                newParent.childNodes[-1]._element.tail += self._element.text
+            else:
+                if not newParent._element.text:
+                    newParent._element.text = ""
+                if self._element.text is not None:
+                    newParent._element.text += self._element.text
+            self._element.text = ""
+            base.Node.reparentChildren(self, newParent)
+
+    class Comment(Element):
+        def __init__(self, data):
+            # Use the superclass constructor to set all properties on the
+            # wrapper element
+            self._element = ElementTree.Comment(data)
+            self.parent = None
+            self._childNodes = []
+            self._flags = []
+
+        def _getData(self):
+            return self._element.text
+
+        def _setData(self, value):
+            self._element.text = value
+
+        data = property(_getData, _setData)
+
+    class DocumentType(Element):
+        def __init__(self, name, publicId, systemId):
+            Element.__init__(self, "<!DOCTYPE>")
+            self._element.text = name
+            self.publicId = publicId
+            self.systemId = systemId
+
+        def _getPublicId(self):
+            return self._element.get("publicId", "")
+
+        def _setPublicId(self, value):
+            if value is not None:
+                self._element.set("publicId", value)
+
+        publicId = property(_getPublicId, _setPublicId)
+
+        def _getSystemId(self):
+            return self._element.get("systemId", "")
+
+        def _setSystemId(self, value):
+            if value is not None:
+                self._element.set("systemId", value)
+
+        systemId = property(_getSystemId, _setSystemId)
+
+    class Document(Element):
+        def __init__(self):
+            Element.__init__(self, "DOCUMENT_ROOT")
+
+    class DocumentFragment(Element):
+        def __init__(self):
+            Element.__init__(self, "DOCUMENT_FRAGMENT")
+
+    def testSerializer(element):
+        rv = []
+
+        def serializeElement(element, indent=0):
+            if not(hasattr(element, "tag")):
+                element = element.getroot()
+            if element.tag == "<!DOCTYPE>":
+                if element.get("publicId") or element.get("systemId"):
+                    publicId = element.get("publicId") or ""
+                    systemId = element.get("systemId") or ""
+                    rv.append("""<!DOCTYPE %s "%s" "%s">""" %
+                              (element.text, publicId, systemId))
+                else:
+                    rv.append("<!DOCTYPE %s>" % (element.text,))
+            elif element.tag == "DOCUMENT_ROOT":
+                rv.append("#document")
+                if element.text is not None:
+                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+                if element.tail is not None:
+                    raise TypeError("Document node cannot have tail")
+                if hasattr(element, "attrib") and len(element.attrib):
+                    raise TypeError("Document node cannot have attributes")
+            elif element.tag == ElementTreeCommentType:
+                rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
+            else:
+                assert isinstance(element.tag, text_type), \
+                    "Expected unicode, got %s, %s" % (type(element.tag), element.tag)
+                nsmatch = tag_regexp.match(element.tag)
+
+                if nsmatch is None:
+                    name = element.tag
+                else:
+                    ns, name = nsmatch.groups()
+                    prefix = constants.prefixes[ns]
+                    name = "%s %s" % (prefix, name)
+                rv.append("|%s<%s>" % (' ' * indent, name))
+
+                if hasattr(element, "attrib"):
+                    attributes = []
+                    for name, value in element.attrib.items():
+                        nsmatch = tag_regexp.match(name)
+                        if nsmatch is not None:
+                            ns, name = nsmatch.groups()
+                            prefix = constants.prefixes[ns]
+                            attr_string = "%s %s" % (prefix, name)
+                        else:
+                            attr_string = name
+                        attributes.append((attr_string, value))
+
+                    for name, value in sorted(attributes):
+                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+                if element.text:
+                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+            indent += 2
+            for child in element:
+                serializeElement(child, indent)
+            if element.tail:
+                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
+        serializeElement(element, 0)
+
+        return "\n".join(rv)
+
+    def tostring(element):  # pylint:disable=unused-variable
+        """Serialize an element and its child nodes to a string"""
+        rv = []
+        filter = _ihatexml.InfosetFilter()
+
+        def serializeElement(element):
+            if isinstance(element, ElementTree.ElementTree):
+                element = element.getroot()
+
+            if element.tag == "<!DOCTYPE>":
+                if element.get("publicId") or element.get("systemId"):
+                    publicId = element.get("publicId") or ""
+                    systemId = element.get("systemId") or ""
+                    rv.append("""<!DOCTYPE %s PUBLIC "%s" "%s">""" %
+                              (element.text, publicId, systemId))
+                else:
+                    rv.append("<!DOCTYPE %s>" % (element.text,))
+            elif element.tag == "DOCUMENT_ROOT":
+                if element.text is not None:
+                    rv.append(element.text)
+                if element.tail is not None:
+                    raise TypeError("Document node cannot have tail")
+                if hasattr(element, "attrib") and len(element.attrib):
+                    raise TypeError("Document node cannot have attributes")
+
+                for child in element:
+                    serializeElement(child)
+
+            elif element.tag == ElementTreeCommentType:
+                rv.append("<!--%s-->" % (element.text,))
+            else:
+                # This is assumed to be an ordinary element
+                if not element.attrib:
+                    rv.append("<%s>" % (filter.fromXmlName(element.tag),))
+                else:
+                    attr = " ".join(["%s=\"%s\"" % (
+                        filter.fromXmlName(name), value)
+                        for name, value in element.attrib.items()])
+                    rv.append("<%s %s>" % (element.tag, attr))
+                if element.text:
+                    rv.append(element.text)
+
+                for child in element:
+                    serializeElement(child)
+
+                rv.append("</%s>" % (element.tag,))
+
+            if element.tail:
+                rv.append(element.tail)
+
+        serializeElement(element)
+
+        return "".join(rv)
+
+    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
+        documentClass = Document
+        doctypeClass = DocumentType
+        elementClass = Element
+        commentClass = Comment
+        fragmentClass = DocumentFragment
+        implementation = ElementTreeImplementation
+
+        def testSerializer(self, element):
+            return testSerializer(element)
+
+        def getDocument(self):
+            if fullTree:
+                return self.document._element
+            else:
+                if self.defaultNamespace is not None:
+                    return self.document._element.find(
+                        "{%s}html" % self.defaultNamespace)
+                else:
+                    return self.document._element.find("html")
+
+        def getFragment(self):
+            return base.TreeBuilder.getFragment(self)._element
+
+    return locals()
+
+
+getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py
new file mode 100644
index 00000000..ca12a99c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py
@@ -0,0 +1,366 @@
+"""Module for supporting the lxml.etree library. The idea here is to use as much
+of the native library as possible, without using fragile hacks like custom element
+names that break between releases. The downside of this is that we cannot represent
+all possible trees; specifically the following are known to cause problems:
+
+Text or comments as siblings of the root element
+Docypes with no name
+
+When any of these things occur, we emit a DataLossWarning
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+# pylint:disable=protected-access
+
+import warnings
+import re
+import sys
+
+from . import base
+from ..constants import DataLossWarning
+from .. import constants
+from . import etree as etree_builders
+from .. import _ihatexml
+
+import lxml.etree as etree
+
+
+fullTree = True
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+comment_type = etree.Comment("asd").tag
+
+
+class DocumentType(object):
+    def __init__(self, name, publicId, systemId):
+        self.name = name
+        self.publicId = publicId
+        self.systemId = systemId
+
+
+class Document(object):
+    def __init__(self):
+        self._elementTree = None
+        self._childNodes = []
+
+    def appendChild(self, element):
+        self._elementTree.getroot().addnext(element._element)
+
+    def _getChildNodes(self):
+        return self._childNodes
+
+    childNodes = property(_getChildNodes)
+
+
+def testSerializer(element):
+    rv = []
+    infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
+
+    def serializeElement(element, indent=0):
+        if not hasattr(element, "tag"):
+            if hasattr(element, "getroot"):
+                # Full tree case
+                rv.append("#document")
+                if element.docinfo.internalDTD:
+                    if not (element.docinfo.public_id or
+                            element.docinfo.system_url):
+                        dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
+                    else:
+                        dtd_str = """<!DOCTYPE %s "%s" "%s">""" % (
+                            element.docinfo.root_name,
+                            element.docinfo.public_id,
+                            element.docinfo.system_url)
+                    rv.append("|%s%s" % (' ' * (indent + 2), dtd_str))
+                next_element = element.getroot()
+                while next_element.getprevious() is not None:
+                    next_element = next_element.getprevious()
+                while next_element is not None:
+                    serializeElement(next_element, indent + 2)
+                    next_element = next_element.getnext()
+            elif isinstance(element, str) or isinstance(element, bytes):
+                # Text in a fragment
+                assert isinstance(element, str) or sys.version_info[0] == 2
+                rv.append("|%s\"%s\"" % (' ' * indent, element))
+            else:
+                # Fragment case
+                rv.append("#document-fragment")
+                for next_element in element:
+                    serializeElement(next_element, indent + 2)
+        elif element.tag == comment_type:
+            rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
+            if hasattr(element, "tail") and element.tail:
+                rv.append("|%s\"%s\"" % (' ' * indent, element.tail))
+        else:
+            assert isinstance(element, etree._Element)
+            nsmatch = etree_builders.tag_regexp.match(element.tag)
+            if nsmatch is not None:
+                ns = nsmatch.group(1)
+                tag = nsmatch.group(2)
+                prefix = constants.prefixes[ns]
+                rv.append("|%s<%s %s>" % (' ' * indent, prefix,
+                                          infosetFilter.fromXmlName(tag)))
+            else:
+                rv.append("|%s<%s>" % (' ' * indent,
+                                       infosetFilter.fromXmlName(element.tag)))
+
+            if hasattr(element, "attrib"):
+                attributes = []
+                for name, value in element.attrib.items():
+                    nsmatch = tag_regexp.match(name)
+                    if nsmatch is not None:
+                        ns, name = nsmatch.groups()
+                        name = infosetFilter.fromXmlName(name)
+                        prefix = constants.prefixes[ns]
+                        attr_string = "%s %s" % (prefix, name)
+                    else:
+                        attr_string = infosetFilter.fromXmlName(name)
+                    attributes.append((attr_string, value))
+
+                for name, value in sorted(attributes):
+                    rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+
+            if element.text:
+                rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+            indent += 2
+            for child in element:
+                serializeElement(child, indent)
+            if hasattr(element, "tail") and element.tail:
+                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
+    serializeElement(element, 0)
+
+    return "\n".join(rv)
+
+
+def tostring(element):
+    """Serialize an element and its child nodes to a string"""
+    rv = []
+
+    def serializeElement(element):
+        if not hasattr(element, "tag"):
+            if element.docinfo.internalDTD:
+                if element.docinfo.doctype:
+                    dtd_str = element.docinfo.doctype
+                else:
+                    dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
+                rv.append(dtd_str)
+            serializeElement(element.getroot())
+
+        elif element.tag == comment_type:
+            rv.append("<!--%s-->" % (element.text,))
+
+        else:
+            # This is assumed to be an ordinary element
+            if not element.attrib:
+                rv.append("<%s>" % (element.tag,))
+            else:
+                attr = " ".join(["%s=\"%s\"" % (name, value)
+                                 for name, value in element.attrib.items()])
+                rv.append("<%s %s>" % (element.tag, attr))
+            if element.text:
+                rv.append(element.text)
+
+            for child in element:
+                serializeElement(child)
+
+            rv.append("</%s>" % (element.tag,))
+
+        if hasattr(element, "tail") and element.tail:
+            rv.append(element.tail)
+
+    serializeElement(element)
+
+    return "".join(rv)
+
+
+class TreeBuilder(base.TreeBuilder):
+    documentClass = Document
+    doctypeClass = DocumentType
+    elementClass = None
+    commentClass = None
+    fragmentClass = Document
+    implementation = etree
+
+    def __init__(self, namespaceHTMLElements, fullTree=False):
+        builder = etree_builders.getETreeModule(etree, fullTree=fullTree)
+        infosetFilter = self.infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
+        self.namespaceHTMLElements = namespaceHTMLElements
+
+        class Attributes(dict):
+            def __init__(self, element, value=None):
+                if value is None:
+                    value = {}
+                self._element = element
+                dict.__init__(self, value)  # pylint:disable=non-parent-init-called
+                for key, value in self.items():
+                    if isinstance(key, tuple):
+                        name = "{%s}%s" % (key[2], infosetFilter.coerceAttribute(key[1]))
+                    else:
+                        name = infosetFilter.coerceAttribute(key)
+                    self._element._element.attrib[name] = value
+
+            def __setitem__(self, key, value):
+                dict.__setitem__(self, key, value)
+                if isinstance(key, tuple):
+                    name = "{%s}%s" % (key[2], infosetFilter.coerceAttribute(key[1]))
+                else:
+                    name = infosetFilter.coerceAttribute(key)
+                self._element._element.attrib[name] = value
+
+        class Element(builder.Element):
+            def __init__(self, name, namespace):
+                name = infosetFilter.coerceElement(name)
+                builder.Element.__init__(self, name, namespace=namespace)
+                self._attributes = Attributes(self)
+
+            def _setName(self, name):
+                self._name = infosetFilter.coerceElement(name)
+                self._element.tag = self._getETreeTag(
+                    self._name, self._namespace)
+
+            def _getName(self):
+                return infosetFilter.fromXmlName(self._name)
+
+            name = property(_getName, _setName)
+
+            def _getAttributes(self):
+                return self._attributes
+
+            def _setAttributes(self, attributes):
+                self._attributes = Attributes(self, attributes)
+
+            attributes = property(_getAttributes, _setAttributes)
+
+            def insertText(self, data, insertBefore=None):
+                data = infosetFilter.coerceCharacters(data)
+                builder.Element.insertText(self, data, insertBefore)
+
+            def appendChild(self, child):
+                builder.Element.appendChild(self, child)
+
+        class Comment(builder.Comment):
+            def __init__(self, data):
+                data = infosetFilter.coerceComment(data)
+                builder.Comment.__init__(self, data)
+
+            def _setData(self, data):
+                data = infosetFilter.coerceComment(data)
+                self._element.text = data
+
+            def _getData(self):
+                return self._element.text
+
+            data = property(_getData, _setData)
+
+        self.elementClass = Element
+        self.commentClass = Comment
+        # self.fragmentClass = builder.DocumentFragment
+        base.TreeBuilder.__init__(self, namespaceHTMLElements)
+
+    def reset(self):
+        base.TreeBuilder.reset(self)
+        self.insertComment = self.insertCommentInitial
+        self.initial_comments = []
+        self.doctype = None
+
+    def testSerializer(self, element):
+        return testSerializer(element)
+
+    def getDocument(self):
+        if fullTree:
+            return self.document._elementTree
+        else:
+            return self.document._elementTree.getroot()
+
+    def getFragment(self):
+        fragment = []
+        element = self.openElements[0]._element
+        if element.text:
+            fragment.append(element.text)
+        fragment.extend(list(element))
+        if element.tail:
+            fragment.append(element.tail)
+        return fragment
+
+    def insertDoctype(self, token):
+        name = token["name"]
+        publicId = token["publicId"]
+        systemId = token["systemId"]
+
+        if not name:
+            warnings.warn("lxml cannot represent empty doctype", DataLossWarning)
+            self.doctype = None
+        else:
+            coercedName = self.infosetFilter.coerceElement(name)
+            if coercedName != name:
+                warnings.warn("lxml cannot represent non-xml doctype", DataLossWarning)
+
+            doctype = self.doctypeClass(coercedName, publicId, systemId)
+            self.doctype = doctype
+
+    def insertCommentInitial(self, data, parent=None):
+        assert parent is None or parent is self.document
+        assert self.document._elementTree is None
+        self.initial_comments.append(data)
+
+    def insertCommentMain(self, data, parent=None):
+        if (parent == self.document and
+                self.document._elementTree.getroot()[-1].tag == comment_type):
+            warnings.warn("lxml cannot represent adjacent comments beyond the root elements", DataLossWarning)
+        super(TreeBuilder, self).insertComment(data, parent)
+
+    def insertRoot(self, token):
+        # Because of the way libxml2 works, it doesn't seem to be possible to
+        # alter information like the doctype after the tree has been parsed.
+        # Therefore we need to use the built-in parser to create our initial
+        # tree, after which we can add elements like normal
+        docStr = ""
+        if self.doctype:
+            assert self.doctype.name
+            docStr += "<!DOCTYPE %s" % self.doctype.name
+            if (self.doctype.publicId is not None or
+                    self.doctype.systemId is not None):
+                docStr += (' PUBLIC "%s" ' %
+                           (self.infosetFilter.coercePubid(self.doctype.publicId or "")))
+                if self.doctype.systemId:
+                    sysid = self.doctype.systemId
+                    if sysid.find("'") >= 0 and sysid.find('"') >= 0:
+                        warnings.warn("DOCTYPE system cannot contain single and double quotes", DataLossWarning)
+                        sysid = sysid.replace("'", 'U00027')
+                    if sysid.find("'") >= 0:
+                        docStr += '"%s"' % sysid
+                    else:
+                        docStr += "'%s'" % sysid
+                else:
+                    docStr += "''"
+            docStr += ">"
+            if self.doctype.name != token["name"]:
+                warnings.warn("lxml cannot represent doctype with a different name to the root element", DataLossWarning)
+        docStr += "<THIS_SHOULD_NEVER_APPEAR_PUBLICLY/>"
+        root = etree.fromstring(docStr)
+
+        # Append the initial comments:
+        for comment_token in self.initial_comments:
+            comment = self.commentClass(comment_token["data"])
+            root.addprevious(comment._element)
+
+        # Create the root document and add the ElementTree to it
+        self.document = self.documentClass()
+        self.document._elementTree = root.getroottree()
+
+        # Give the root element the right name
+        name = token["name"]
+        namespace = token.get("namespace", self.defaultNamespace)
+        if namespace is None:
+            etree_tag = name
+        else:
+            etree_tag = "{%s}%s" % (namespace, name)
+        root.tag = etree_tag
+
+        # Add the root element to the internal child/open data structures
+        root_element = self.elementClass(name, namespace)
+        root_element._element = root
+        self.document._childNodes.append(root_element)
+        self.openElements.append(root_element)
+
+        # Reset to the default insert comment function
+        self.insertComment = self.insertCommentMain
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py
new file mode 100644
index 00000000..9bec2076
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py
@@ -0,0 +1,154 @@
+"""A collection of modules for iterating through different kinds of
+tree, generating tokens identical to those produced by the tokenizer
+module.
+
+To create a tree walker for a new type of tree, you need to do
+implement a tree walker object (called TreeWalker by convention) that
+implements a 'serialize' method taking a tree as sole argument and
+returning an iterator generating tokens.
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .. import constants
+from .._utils import default_etree
+
+__all__ = ["getTreeWalker", "pprint"]
+
+treeWalkerCache = {}
+
+
+def getTreeWalker(treeType, implementation=None, **kwargs):
+    """Get a TreeWalker class for various types of tree with built-in support
+
+    :arg str treeType: the name of the tree type required (case-insensitive).
+        Supported values are:
+
+        * "dom": The xml.dom.minidom DOM implementation
+        * "etree": A generic walker for tree implementations exposing an
+          elementtree-like interface (known to work with ElementTree,
+          cElementTree and lxml.etree).
+        * "lxml": Optimized walker for lxml.etree
+        * "genshi": a Genshi stream
+
+    :arg implementation: A module implementing the tree type e.g.
+        xml.etree.ElementTree or cElementTree (Currently applies to the "etree"
+        tree type only).
+
+    :arg kwargs: keyword arguments passed to the etree walker--for other
+        walkers, this has no effect
+
+    :returns: a TreeWalker class
+
+    """
+
+    treeType = treeType.lower()
+    if treeType not in treeWalkerCache:
+        if treeType == "dom":
+            from . import dom
+            treeWalkerCache[treeType] = dom.TreeWalker
+        elif treeType == "genshi":
+            from . import genshi
+            treeWalkerCache[treeType] = genshi.TreeWalker
+        elif treeType == "lxml":
+            from . import etree_lxml
+            treeWalkerCache[treeType] = etree_lxml.TreeWalker
+        elif treeType == "etree":
+            from . import etree
+            if implementation is None:
+                implementation = default_etree
+            # XXX: NEVER cache here, caching is done in the etree submodule
+            return etree.getETreeModule(implementation, **kwargs).TreeWalker
+    return treeWalkerCache.get(treeType)
+
+
+def concatenateCharacterTokens(tokens):
+    pendingCharacters = []
+    for token in tokens:
+        type = token["type"]
+        if type in ("Characters", "SpaceCharacters"):
+            pendingCharacters.append(token["data"])
+        else:
+            if pendingCharacters:
+                yield {"type": "Characters", "data": "".join(pendingCharacters)}
+                pendingCharacters = []
+            yield token
+    if pendingCharacters:
+        yield {"type": "Characters", "data": "".join(pendingCharacters)}
+
+
+def pprint(walker):
+    """Pretty printer for tree walkers
+
+    Takes a TreeWalker instance and pretty prints the output of walking the tree.
+
+    :arg walker: a TreeWalker instance
+
+    """
+    output = []
+    indent = 0
+    for token in concatenateCharacterTokens(walker):
+        type = token["type"]
+        if type in ("StartTag", "EmptyTag"):
+            # tag name
+            if token["namespace"] and token["namespace"] != constants.namespaces["html"]:
+                if token["namespace"] in constants.prefixes:
+                    ns = constants.prefixes[token["namespace"]]
+                else:
+                    ns = token["namespace"]
+                name = "%s %s" % (ns, token["name"])
+            else:
+                name = token["name"]
+            output.append("%s<%s>" % (" " * indent, name))
+            indent += 2
+            # attributes (sorted for consistent ordering)
+            attrs = token["data"]
+            for (namespace, localname), value in sorted(attrs.items()):
+                if namespace:
+                    if namespace in constants.prefixes:
+                        ns = constants.prefixes[namespace]
+                    else:
+                        ns = namespace
+                    name = "%s %s" % (ns, localname)
+                else:
+                    name = localname
+                output.append("%s%s=\"%s\"" % (" " * indent, name, value))
+            # self-closing
+            if type == "EmptyTag":
+                indent -= 2
+
+        elif type == "EndTag":
+            indent -= 2
+
+        elif type == "Comment":
+            output.append("%s<!-- %s -->" % (" " * indent, token["data"]))
+
+        elif type == "Doctype":
+            if token["name"]:
+                if token["publicId"]:
+                    output.append("""%s<!DOCTYPE %s "%s" "%s">""" %
+                                  (" " * indent,
+                                   token["name"],
+                                   token["publicId"],
+                                   token["systemId"] if token["systemId"] else ""))
+                elif token["systemId"]:
+                    output.append("""%s<!DOCTYPE %s "" "%s">""" %
+                                  (" " * indent,
+                                   token["name"],
+                                   token["systemId"]))
+                else:
+                    output.append("%s<!DOCTYPE %s>" % (" " * indent,
+                                                       token["name"]))
+            else:
+                output.append("%s<!DOCTYPE >" % (" " * indent,))
+
+        elif type == "Characters":
+            output.append("%s\"%s\"" % (" " * indent, token["data"]))
+
+        elif type == "SpaceCharacters":
+            assert False, "concatenateCharacterTokens should have got rid of all Space tokens"
+
+        else:
+            raise ValueError("Unknown token type, %s" % type)
+
+    return "\n".join(output)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..e33f4ae2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/base.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/base.cpython-37.pyc
new file mode 100644
index 00000000..a3e9c3c9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/base.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/dom.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/dom.cpython-37.pyc
new file mode 100644
index 00000000..3e3407de
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/dom.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree.cpython-37.pyc
new file mode 100644
index 00000000..23bc58c5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree_lxml.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree_lxml.cpython-37.pyc
new file mode 100644
index 00000000..730e09a6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/etree_lxml.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/genshi.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/genshi.cpython-37.pyc
new file mode 100644
index 00000000..918c8cdd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/__pycache__/genshi.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/base.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/base.py
new file mode 100644
index 00000000..80c474c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/base.py
@@ -0,0 +1,252 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.dom import Node
+from ..constants import namespaces, voidElements, spaceCharacters
+
+__all__ = ["DOCUMENT", "DOCTYPE", "TEXT", "ELEMENT", "COMMENT", "ENTITY", "UNKNOWN",
+           "TreeWalker", "NonRecursiveTreeWalker"]
+
+DOCUMENT = Node.DOCUMENT_NODE
+DOCTYPE = Node.DOCUMENT_TYPE_NODE
+TEXT = Node.TEXT_NODE
+ELEMENT = Node.ELEMENT_NODE
+COMMENT = Node.COMMENT_NODE
+ENTITY = Node.ENTITY_NODE
+UNKNOWN = "<#UNKNOWN#>"
+
+spaceCharacters = "".join(spaceCharacters)
+
+
+class TreeWalker(object):
+    """Walks a tree yielding tokens
+
+    Tokens are dicts that all have a ``type`` field specifying the type of the
+    token.
+
+    """
+    def __init__(self, tree):
+        """Creates a TreeWalker
+
+        :arg tree: the tree to walk
+
+        """
+        self.tree = tree
+
+    def __iter__(self):
+        raise NotImplementedError
+
+    def error(self, msg):
+        """Generates an error token with the given message
+
+        :arg msg: the error message
+
+        :returns: SerializeError token
+
+        """
+        return {"type": "SerializeError", "data": msg}
+
+    def emptyTag(self, namespace, name, attrs, hasChildren=False):
+        """Generates an EmptyTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :arg attrs: the attributes of the element as a dict
+
+        :arg hasChildren: whether or not to yield a SerializationError because
+            this tag shouldn't have children
+
+        :returns: EmptyTag token
+
+        """
+        yield {"type": "EmptyTag", "name": name,
+               "namespace": namespace,
+               "data": attrs}
+        if hasChildren:
+            yield self.error("Void element has children")
+
+    def startTag(self, namespace, name, attrs):
+        """Generates a StartTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :arg attrs: the attributes of the element as a dict
+
+        :returns: StartTag token
+
+        """
+        return {"type": "StartTag",
+                "name": name,
+                "namespace": namespace,
+                "data": attrs}
+
+    def endTag(self, namespace, name):
+        """Generates an EndTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :returns: EndTag token
+
+        """
+        return {"type": "EndTag",
+                "name": name,
+                "namespace": namespace}
+
+    def text(self, data):
+        """Generates SpaceCharacters and Characters tokens
+
+        Depending on what's in the data, this generates one or more
+        ``SpaceCharacters`` and ``Characters`` tokens.
+
+        For example:
+
+            >>> from html5lib.treewalkers.base import TreeWalker
+            >>> # Give it an empty tree just so it instantiates
+            >>> walker = TreeWalker([])
+            >>> list(walker.text(''))
+            []
+            >>> list(walker.text('  '))
+            [{u'data': '  ', u'type': u'SpaceCharacters'}]
+            >>> list(walker.text(' abc '))  # doctest: +NORMALIZE_WHITESPACE
+            [{u'data': ' ', u'type': u'SpaceCharacters'},
+            {u'data': u'abc', u'type': u'Characters'},
+            {u'data': u' ', u'type': u'SpaceCharacters'}]
+
+        :arg data: the text data
+
+        :returns: one or more ``SpaceCharacters`` and ``Characters`` tokens
+
+        """
+        data = data
+        middle = data.lstrip(spaceCharacters)
+        left = data[:len(data) - len(middle)]
+        if left:
+            yield {"type": "SpaceCharacters", "data": left}
+        data = middle
+        middle = data.rstrip(spaceCharacters)
+        right = data[len(middle):]
+        if middle:
+            yield {"type": "Characters", "data": middle}
+        if right:
+            yield {"type": "SpaceCharacters", "data": right}
+
+    def comment(self, data):
+        """Generates a Comment token
+
+        :arg data: the comment
+
+        :returns: Comment token
+
+        """
+        return {"type": "Comment", "data": data}
+
+    def doctype(self, name, publicId=None, systemId=None):
+        """Generates a Doctype token
+
+        :arg name:
+
+        :arg publicId:
+
+        :arg systemId:
+
+        :returns: the Doctype token
+
+        """
+        return {"type": "Doctype",
+                "name": name,
+                "publicId": publicId,
+                "systemId": systemId}
+
+    def entity(self, name):
+        """Generates an Entity token
+
+        :arg name: the entity name
+
+        :returns: an Entity token
+
+        """
+        return {"type": "Entity", "name": name}
+
+    def unknown(self, nodeType):
+        """Handles unknown node types"""
+        return self.error("Unknown node type: " + nodeType)
+
+
+class NonRecursiveTreeWalker(TreeWalker):
+    def getNodeDetails(self, node):
+        raise NotImplementedError
+
+    def getFirstChild(self, node):
+        raise NotImplementedError
+
+    def getNextSibling(self, node):
+        raise NotImplementedError
+
+    def getParentNode(self, node):
+        raise NotImplementedError
+
+    def __iter__(self):
+        currentNode = self.tree
+        while currentNode is not None:
+            details = self.getNodeDetails(currentNode)
+            type, details = details[0], details[1:]
+            hasChildren = False
+
+            if type == DOCTYPE:
+                yield self.doctype(*details)
+
+            elif type == TEXT:
+                for token in self.text(*details):
+                    yield token
+
+            elif type == ELEMENT:
+                namespace, name, attributes, hasChildren = details
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    for token in self.emptyTag(namespace, name, attributes,
+                                               hasChildren):
+                        yield token
+                    hasChildren = False
+                else:
+                    yield self.startTag(namespace, name, attributes)
+
+            elif type == COMMENT:
+                yield self.comment(details[0])
+
+            elif type == ENTITY:
+                yield self.entity(details[0])
+
+            elif type == DOCUMENT:
+                hasChildren = True
+
+            else:
+                yield self.unknown(details[0])
+
+            if hasChildren:
+                firstChild = self.getFirstChild(currentNode)
+            else:
+                firstChild = None
+
+            if firstChild is not None:
+                currentNode = firstChild
+            else:
+                while currentNode is not None:
+                    details = self.getNodeDetails(currentNode)
+                    type, details = details[0], details[1:]
+                    if type == ELEMENT:
+                        namespace, name, attributes, hasChildren = details
+                        if (namespace and namespace != namespaces["html"]) or name not in voidElements:
+                            yield self.endTag(namespace, name)
+                    if self.tree is currentNode:
+                        currentNode = None
+                        break
+                    nextSibling = self.getNextSibling(currentNode)
+                    if nextSibling is not None:
+                        currentNode = nextSibling
+                        break
+                    else:
+                        currentNode = self.getParentNode(currentNode)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/dom.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/dom.py
new file mode 100644
index 00000000..b0c89b00
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/dom.py
@@ -0,0 +1,43 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.dom import Node
+
+from . import base
+
+
+class TreeWalker(base.NonRecursiveTreeWalker):
+    def getNodeDetails(self, node):
+        if node.nodeType == Node.DOCUMENT_TYPE_NODE:
+            return base.DOCTYPE, node.name, node.publicId, node.systemId
+
+        elif node.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
+            return base.TEXT, node.nodeValue
+
+        elif node.nodeType == Node.ELEMENT_NODE:
+            attrs = {}
+            for attr in list(node.attributes.keys()):
+                attr = node.getAttributeNode(attr)
+                if attr.namespaceURI:
+                    attrs[(attr.namespaceURI, attr.localName)] = attr.value
+                else:
+                    attrs[(None, attr.name)] = attr.value
+            return (base.ELEMENT, node.namespaceURI, node.nodeName,
+                    attrs, node.hasChildNodes())
+
+        elif node.nodeType == Node.COMMENT_NODE:
+            return base.COMMENT, node.nodeValue
+
+        elif node.nodeType in (Node.DOCUMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE):
+            return (base.DOCUMENT,)
+
+        else:
+            return base.UNKNOWN, node.nodeType
+
+    def getFirstChild(self, node):
+        return node.firstChild
+
+    def getNextSibling(self, node):
+        return node.nextSibling
+
+    def getParentNode(self, node):
+        return node.parentNode
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree.py
new file mode 100644
index 00000000..95fc0c17
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree.py
@@ -0,0 +1,130 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from collections import OrderedDict
+import re
+
+from pip._vendor.six import string_types
+
+from . import base
+from .._utils import moduleFactoryFactory
+
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+
+def getETreeBuilder(ElementTreeImplementation):
+    ElementTree = ElementTreeImplementation
+    ElementTreeCommentType = ElementTree.Comment("asd").tag
+
+    class TreeWalker(base.NonRecursiveTreeWalker):  # pylint:disable=unused-variable
+        """Given the particular ElementTree representation, this implementation,
+        to avoid using recursion, returns "nodes" as tuples with the following
+        content:
+
+        1. The current element
+
+        2. The index of the element relative to its parent
+
+        3. A stack of ancestor elements
+
+        4. A flag "text", "tail" or None to indicate if the current node is a
+           text node; either the text or tail of the current element (1)
+        """
+        def getNodeDetails(self, node):
+            if isinstance(node, tuple):  # It might be the root Element
+                elt, _, _, flag = node
+                if flag in ("text", "tail"):
+                    return base.TEXT, getattr(elt, flag)
+                else:
+                    node = elt
+
+            if not(hasattr(node, "tag")):
+                node = node.getroot()
+
+            if node.tag in ("DOCUMENT_ROOT", "DOCUMENT_FRAGMENT"):
+                return (base.DOCUMENT,)
+
+            elif node.tag == "<!DOCTYPE>":
+                return (base.DOCTYPE, node.text,
+                        node.get("publicId"), node.get("systemId"))
+
+            elif node.tag == ElementTreeCommentType:
+                return base.COMMENT, node.text
+
+            else:
+                assert isinstance(node.tag, string_types), type(node.tag)
+                # This is assumed to be an ordinary element
+                match = tag_regexp.match(node.tag)
+                if match:
+                    namespace, tag = match.groups()
+                else:
+                    namespace = None
+                    tag = node.tag
+                attrs = OrderedDict()
+                for name, value in list(node.attrib.items()):
+                    match = tag_regexp.match(name)
+                    if match:
+                        attrs[(match.group(1), match.group(2))] = value
+                    else:
+                        attrs[(None, name)] = value
+                return (base.ELEMENT, namespace, tag,
+                        attrs, len(node) or node.text)
+
+        def getFirstChild(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                element, key, parents, flag = node, None, [], None
+
+            if flag in ("text", "tail"):
+                return None
+            else:
+                if element.text:
+                    return element, key, parents, "text"
+                elif len(element):
+                    parents.append(element)
+                    return element[0], 0, parents, None
+                else:
+                    return None
+
+        def getNextSibling(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                return None
+
+            if flag == "text":
+                if len(element):
+                    parents.append(element)
+                    return element[0], 0, parents, None
+                else:
+                    return None
+            else:
+                if element.tail and flag != "tail":
+                    return element, key, parents, "tail"
+                elif key < len(parents[-1]) - 1:
+                    return parents[-1][key + 1], key + 1, parents, None
+                else:
+                    return None
+
+        def getParentNode(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                return None
+
+            if flag == "text":
+                if not parents:
+                    return element
+                else:
+                    return element, key, parents, None
+            else:
+                parent = parents.pop()
+                if not parents:
+                    return parent
+                else:
+                    assert list(parents[-1]).count(parent) == 1
+                    return parent, list(parents[-1]).index(parent), parents, None
+
+    return locals()
+
+getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py
new file mode 100644
index 00000000..e81ddf33
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py
@@ -0,0 +1,213 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from lxml import etree
+from ..treebuilders.etree import tag_regexp
+
+from . import base
+
+from .. import _ihatexml
+
+
+def ensure_str(s):
+    if s is None:
+        return None
+    elif isinstance(s, text_type):
+        return s
+    else:
+        return s.decode("ascii", "strict")
+
+
+class Root(object):
+    def __init__(self, et):
+        self.elementtree = et
+        self.children = []
+
+        try:
+            if et.docinfo.internalDTD:
+                self.children.append(Doctype(self,
+                                             ensure_str(et.docinfo.root_name),
+                                             ensure_str(et.docinfo.public_id),
+                                             ensure_str(et.docinfo.system_url)))
+        except AttributeError:
+            pass
+
+        try:
+            node = et.getroot()
+        except AttributeError:
+            node = et
+
+        while node.getprevious() is not None:
+            node = node.getprevious()
+        while node is not None:
+            self.children.append(node)
+            node = node.getnext()
+
+        self.text = None
+        self.tail = None
+
+    def __getitem__(self, key):
+        return self.children[key]
+
+    def getnext(self):
+        return None
+
+    def __len__(self):
+        return 1
+
+
+class Doctype(object):
+    def __init__(self, root_node, name, public_id, system_id):
+        self.root_node = root_node
+        self.name = name
+        self.public_id = public_id
+        self.system_id = system_id
+
+        self.text = None
+        self.tail = None
+
+    def getnext(self):
+        return self.root_node.children[1]
+
+
+class FragmentRoot(Root):
+    def __init__(self, children):
+        self.children = [FragmentWrapper(self, child) for child in children]
+        self.text = self.tail = None
+
+    def getnext(self):
+        return None
+
+
+class FragmentWrapper(object):
+    def __init__(self, fragment_root, obj):
+        self.root_node = fragment_root
+        self.obj = obj
+        if hasattr(self.obj, 'text'):
+            self.text = ensure_str(self.obj.text)
+        else:
+            self.text = None
+        if hasattr(self.obj, 'tail'):
+            self.tail = ensure_str(self.obj.tail)
+        else:
+            self.tail = None
+
+    def __getattr__(self, name):
+        return getattr(self.obj, name)
+
+    def getnext(self):
+        siblings = self.root_node.children
+        idx = siblings.index(self)
+        if idx < len(siblings) - 1:
+            return siblings[idx + 1]
+        else:
+            return None
+
+    def __getitem__(self, key):
+        return self.obj[key]
+
+    def __bool__(self):
+        return bool(self.obj)
+
+    def getparent(self):
+        return None
+
+    def __str__(self):
+        return str(self.obj)
+
+    def __unicode__(self):
+        return str(self.obj)
+
+    def __len__(self):
+        return len(self.obj)
+
+
+class TreeWalker(base.NonRecursiveTreeWalker):
+    def __init__(self, tree):
+        # pylint:disable=redefined-variable-type
+        if isinstance(tree, list):
+            self.fragmentChildren = set(tree)
+            tree = FragmentRoot(tree)
+        else:
+            self.fragmentChildren = set()
+            tree = Root(tree)
+        base.NonRecursiveTreeWalker.__init__(self, tree)
+        self.filter = _ihatexml.InfosetFilter()
+
+    def getNodeDetails(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            return base.TEXT, ensure_str(getattr(node, key))
+
+        elif isinstance(node, Root):
+            return (base.DOCUMENT,)
+
+        elif isinstance(node, Doctype):
+            return base.DOCTYPE, node.name, node.public_id, node.system_id
+
+        elif isinstance(node, FragmentWrapper) and not hasattr(node, "tag"):
+            return base.TEXT, ensure_str(node.obj)
+
+        elif node.tag == etree.Comment:
+            return base.COMMENT, ensure_str(node.text)
+
+        elif node.tag == etree.Entity:
+            return base.ENTITY, ensure_str(node.text)[1:-1]  # strip &;
+
+        else:
+            # This is assumed to be an ordinary element
+            match = tag_regexp.match(ensure_str(node.tag))
+            if match:
+                namespace, tag = match.groups()
+            else:
+                namespace = None
+                tag = ensure_str(node.tag)
+            attrs = {}
+            for name, value in list(node.attrib.items()):
+                name = ensure_str(name)
+                value = ensure_str(value)
+                match = tag_regexp.match(name)
+                if match:
+                    attrs[(match.group(1), match.group(2))] = value
+                else:
+                    attrs[(None, name)] = value
+            return (base.ELEMENT, namespace, self.filter.fromXmlName(tag),
+                    attrs, len(node) > 0 or node.text)
+
+    def getFirstChild(self, node):
+        assert not isinstance(node, tuple), "Text nodes have no children"
+
+        assert len(node) or node.text, "Node has no children"
+        if node.text:
+            return (node, "text")
+        else:
+            return node[0]
+
+    def getNextSibling(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            if key == "text":
+                # XXX: we cannot use a "bool(node) and node[0] or None" construct here
+                # because node[0] might evaluate to False if it has no child element
+                if len(node):
+                    return node[0]
+                else:
+                    return None
+            else:  # tail
+                return node.getnext()
+
+        return (node, "tail") if node.tail else node.getnext()
+
+    def getParentNode(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            if key == "text":
+                return node
+            # else: fallback to "normal" processing
+        elif node in self.fragmentChildren:
+            return None
+
+        return node.getparent()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py
new file mode 100644
index 00000000..7483be27
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py
@@ -0,0 +1,69 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from genshi.core import QName
+from genshi.core import START, END, XML_NAMESPACE, DOCTYPE, TEXT
+from genshi.core import START_NS, END_NS, START_CDATA, END_CDATA, PI, COMMENT
+
+from . import base
+
+from ..constants import voidElements, namespaces
+
+
+class TreeWalker(base.TreeWalker):
+    def __iter__(self):
+        # Buffer the events so we can pass in the following one
+        previous = None
+        for event in self.tree:
+            if previous is not None:
+                for token in self.tokens(previous, event):
+                    yield token
+            previous = event
+
+        # Don't forget the final event!
+        if previous is not None:
+            for token in self.tokens(previous, None):
+                yield token
+
+    def tokens(self, event, next):
+        kind, data, _ = event
+        if kind == START:
+            tag, attribs = data
+            name = tag.localname
+            namespace = tag.namespace
+            converted_attribs = {}
+            for k, v in attribs:
+                if isinstance(k, QName):
+                    converted_attribs[(k.namespace, k.localname)] = v
+                else:
+                    converted_attribs[(None, k)] = v
+
+            if namespace == namespaces["html"] and name in voidElements:
+                for token in self.emptyTag(namespace, name, converted_attribs,
+                                           not next or next[0] != END or
+                                           next[1] != tag):
+                    yield token
+            else:
+                yield self.startTag(namespace, name, converted_attribs)
+
+        elif kind == END:
+            name = data.localname
+            namespace = data.namespace
+            if namespace != namespaces["html"] or name not in voidElements:
+                yield self.endTag(namespace, name)
+
+        elif kind == COMMENT:
+            yield self.comment(data)
+
+        elif kind == TEXT:
+            for token in self.text(data):
+                yield token
+
+        elif kind == DOCTYPE:
+            yield self.doctype(*data)
+
+        elif kind in (XML_NAMESPACE, DOCTYPE, START_NS, END_NS,
+                      START_CDATA, END_CDATA, PI):
+            pass
+
+        else:
+            yield self.unknown(kind)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__init__.py
new file mode 100644
index 00000000..847bf935
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__init__.py
@@ -0,0 +1,2 @@
+from .package_data import __version__
+from .core import *
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..f57cf52a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/codec.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/codec.cpython-37.pyc
new file mode 100644
index 00000000..5252bf7d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/codec.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/compat.cpython-37.pyc
new file mode 100644
index 00000000..1cd10ab5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/core.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/core.cpython-37.pyc
new file mode 100644
index 00000000..3fc07800
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/core.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/idnadata.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/idnadata.cpython-37.pyc
new file mode 100644
index 00000000..d0dbb1a7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/idnadata.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/intranges.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/intranges.cpython-37.pyc
new file mode 100644
index 00000000..335806ce
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/intranges.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-37.pyc
new file mode 100644
index 00000000..7e5f9b95
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-37.pyc
new file mode 100644
index 00000000..831dfa7a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/codec.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/codec.py
new file mode 100644
index 00000000..98c65ead
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/codec.py
@@ -0,0 +1,118 @@
+from .core import encode, decode, alabel, ulabel, IDNAError
+import codecs
+import re
+
+_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
+
+class Codec(codecs.Codec):
+
+    def encode(self, data, errors='strict'):
+
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return "", 0
+
+        return encode(data), len(data)
+
+    def decode(self, data, errors='strict'):
+
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return u"", 0
+
+        return decode(data), len(data)
+
+class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
+    def _buffer_encode(self, data, errors, final):
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return ("", 0)
+
+        labels = _unicode_dots_re.split(data)
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = '.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = '.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(alabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        # Join with U+002E
+        result = ".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
+
+class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
+    def _buffer_decode(self, data, errors, final):
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return (u"", 0)
+
+        # IDNA allows decoding to operate on Unicode strings, too.
+        if isinstance(data, unicode):
+            labels = _unicode_dots_re.split(data)
+        else:
+            # Must be ASCII string
+            data = str(data)
+            unicode(data, "ascii")
+            labels = data.split(".")
+
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = u'.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = u'.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(ulabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        result = u".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+def getregentry():
+    return codecs.CodecInfo(
+        name='idna',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamwriter=StreamWriter,
+        streamreader=StreamReader,
+    )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/compat.py
new file mode 100644
index 00000000..4d47f336
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/compat.py
@@ -0,0 +1,12 @@
+from .core import *
+from .codec import *
+
+def ToASCII(label):
+    return encode(label)
+
+def ToUnicode(label):
+    return decode(label)
+
+def nameprep(s):
+    raise NotImplementedError("IDNA 2008 does not utilise nameprep protocol")
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/core.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/core.py
new file mode 100644
index 00000000..104624ad
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/core.py
@@ -0,0 +1,396 @@
+from . import idnadata
+import bisect
+import unicodedata
+import re
+import sys
+from .intranges import intranges_contain
+
+_virama_combining_class = 9
+_alabel_prefix = b'xn--'
+_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
+
+if sys.version_info[0] == 3:
+    unicode = str
+    unichr = chr
+
+class IDNAError(UnicodeError):
+    """ Base exception for all IDNA-encoding related problems """
+    pass
+
+
+class IDNABidiError(IDNAError):
+    """ Exception when bidirectional requirements are not satisfied """
+    pass
+
+
+class InvalidCodepoint(IDNAError):
+    """ Exception when a disallowed or unallocated codepoint is used """
+    pass
+
+
+class InvalidCodepointContext(IDNAError):
+    """ Exception when the codepoint is not valid in the context it is used """
+    pass
+
+
+def _combining_class(cp):
+    v = unicodedata.combining(unichr(cp))
+    if v == 0:
+        if not unicodedata.name(unichr(cp)):
+            raise ValueError("Unknown character in unicodedata")
+    return v
+
+def _is_script(cp, script):
+    return intranges_contain(ord(cp), idnadata.scripts[script])
+
+def _punycode(s):
+    return s.encode('punycode')
+
+def _unot(s):
+    return 'U+{0:04X}'.format(s)
+
+
+def valid_label_length(label):
+
+    if len(label) > 63:
+        return False
+    return True
+
+
+def valid_string_length(label, trailing_dot):
+
+    if len(label) > (254 if trailing_dot else 253):
+        return False
+    return True
+
+
+def check_bidi(label, check_ltr=False):
+
+    # Bidi rules should only be applied if string contains RTL characters
+    bidi_label = False
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+        if direction == '':
+            # String likely comes from a newer version of Unicode
+            raise IDNABidiError('Unknown directionality in label {0} at position {1}'.format(repr(label), idx))
+        if direction in ['R', 'AL', 'AN']:
+            bidi_label = True
+    if not bidi_label and not check_ltr:
+        return True
+
+    # Bidi rule 1
+    direction = unicodedata.bidirectional(label[0])
+    if direction in ['R', 'AL']:
+        rtl = True
+    elif direction == 'L':
+        rtl = False
+    else:
+        raise IDNABidiError('First codepoint in label {0} must be directionality L, R or AL'.format(repr(label)))
+
+    valid_ending = False
+    number_type = False
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+
+        if rtl:
+            # Bidi rule 2
+            if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {0} in a right-to-left label'.format(idx))
+            # Bidi rule 3
+            if direction in ['R', 'AL', 'EN', 'AN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+            # Bidi rule 4
+            if direction in ['AN', 'EN']:
+                if not number_type:
+                    number_type = direction
+                else:
+                    if number_type != direction:
+                        raise IDNABidiError('Can not mix numeral types in a right-to-left label')
+        else:
+            # Bidi rule 5
+            if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {0} in a left-to-right label'.format(idx))
+            # Bidi rule 6
+            if direction in ['L', 'EN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+
+    if not valid_ending:
+        raise IDNABidiError('Label ends with illegal codepoint directionality')
+
+    return True
+
+
+def check_initial_combiner(label):
+
+    if unicodedata.category(label[0])[0] == 'M':
+        raise IDNAError('Label begins with an illegal combining character')
+    return True
+
+
+def check_hyphen_ok(label):
+
+    if label[2:4] == '--':
+        raise IDNAError('Label has disallowed hyphens in 3rd and 4th position')
+    if label[0] == '-' or label[-1] == '-':
+        raise IDNAError('Label must not start or end with a hyphen')
+    return True
+
+
+def check_nfc(label):
+
+    if unicodedata.normalize('NFC', label) != label:
+        raise IDNAError('Label must be in Normalization Form C')
+
+
+def valid_contextj(label, pos):
+
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x200c:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+
+        ok = False
+        for i in range(pos-1, -1, -1):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('L'), ord('D')]:
+                ok = True
+                break
+
+        if not ok:
+            return False
+
+        ok = False
+        for i in range(pos+1, len(label)):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('R'), ord('D')]:
+                ok = True
+                break
+        return ok
+
+    if cp_value == 0x200d:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+        return False
+
+    else:
+
+        return False
+
+
+def valid_contexto(label, pos, exception=False):
+
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x00b7:
+        if 0 < pos < len(label)-1:
+            if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c:
+                return True
+        return False
+
+    elif cp_value == 0x0375:
+        if pos < len(label)-1 and len(label) > 1:
+            return _is_script(label[pos + 1], 'Greek')
+        return False
+
+    elif cp_value == 0x05f3 or cp_value == 0x05f4:
+        if pos > 0:
+            return _is_script(label[pos - 1], 'Hebrew')
+        return False
+
+    elif cp_value == 0x30fb:
+        for cp in label:
+            if cp == u'\u30fb':
+                continue
+            if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'):
+                return True
+        return False
+
+    elif 0x660 <= cp_value <= 0x669:
+        for cp in label:
+            if 0x6f0 <= ord(cp) <= 0x06f9:
+                return False
+        return True
+
+    elif 0x6f0 <= cp_value <= 0x6f9:
+        for cp in label:
+            if 0x660 <= ord(cp) <= 0x0669:
+                return False
+        return True
+
+
+def check_label(label):
+
+    if isinstance(label, (bytes, bytearray)):
+        label = label.decode('utf-8')
+    if len(label) == 0:
+        raise IDNAError('Empty Label')
+
+    check_nfc(label)
+    check_hyphen_ok(label)
+    check_initial_combiner(label)
+
+    for (pos, cp) in enumerate(label):
+        cp_value = ord(cp)
+        if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']):
+            continue
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']):
+            try:
+                if not valid_contextj(label, pos):
+                    raise InvalidCodepointContext('Joiner {0} not allowed at position {1} in {2}'.format(
+                        _unot(cp_value), pos+1, repr(label)))
+            except ValueError:
+                raise IDNAError('Unknown codepoint adjacent to joiner {0} at position {1} in {2}'.format(
+                    _unot(cp_value), pos+1, repr(label)))
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']):
+            if not valid_contexto(label, pos):
+                raise InvalidCodepointContext('Codepoint {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label)))
+        else:
+            raise InvalidCodepoint('Codepoint {0} at position {1} of {2} not allowed'.format(_unot(cp_value), pos+1, repr(label)))
+
+    check_bidi(label)
+
+
+def alabel(label):
+
+    try:
+        label = label.encode('ascii')
+        ulabel(label)
+        if not valid_label_length(label):
+            raise IDNAError('Label too long')
+        return label
+    except UnicodeEncodeError:
+        pass
+
+    if not label:
+        raise IDNAError('No Input')
+
+    label = unicode(label)
+    check_label(label)
+    label = _punycode(label)
+    label = _alabel_prefix + label
+
+    if not valid_label_length(label):
+        raise IDNAError('Label too long')
+
+    return label
+
+
+def ulabel(label):
+
+    if not isinstance(label, (bytes, bytearray)):
+        try:
+            label = label.encode('ascii')
+        except UnicodeEncodeError:
+            check_label(label)
+            return label
+
+    label = label.lower()
+    if label.startswith(_alabel_prefix):
+        label = label[len(_alabel_prefix):]
+    else:
+        check_label(label)
+        return label.decode('ascii')
+
+    label = label.decode('punycode')
+    check_label(label)
+    return label
+
+
+def uts46_remap(domain, std3_rules=True, transitional=False):
+    """Re-map the characters in the string according to UTS46 processing."""
+    from .uts46data import uts46data
+    output = u""
+    try:
+        for pos, char in enumerate(domain):
+            code_point = ord(char)
+            uts46row = uts46data[code_point if code_point < 256 else
+                bisect.bisect_left(uts46data, (code_point, "Z")) - 1]
+            status = uts46row[1]
+            replacement = uts46row[2] if len(uts46row) == 3 else None
+            if (status == "V" or
+                    (status == "D" and not transitional) or
+                    (status == "3" and not std3_rules and replacement is None)):
+                output += char
+            elif replacement is not None and (status == "M" or
+                    (status == "3" and not std3_rules) or
+                    (status == "D" and transitional)):
+                output += replacement
+            elif status != "I":
+                raise IndexError()
+        return unicodedata.normalize("NFC", output)
+    except IndexError:
+        raise InvalidCodepoint(
+            "Codepoint {0} not allowed at position {1} in {2}".format(
+            _unot(code_point), pos + 1, repr(domain)))
+
+
+def encode(s, strict=False, uts46=False, std3_rules=False, transitional=False):
+
+    if isinstance(s, (bytes, bytearray)):
+        s = s.decode("ascii")
+    if uts46:
+        s = uts46_remap(s, std3_rules, transitional)
+    trailing_dot = False
+    result = []
+    if strict:
+        labels = s.split('.')
+    else:
+        labels = _unicode_dots_re.split(s)
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if labels[-1] == '':
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = alabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append(b'')
+    s = b'.'.join(result)
+    if not valid_string_length(s, trailing_dot):
+        raise IDNAError('Domain too long')
+    return s
+
+
+def decode(s, strict=False, uts46=False, std3_rules=False):
+
+    if isinstance(s, (bytes, bytearray)):
+        s = s.decode("ascii")
+    if uts46:
+        s = uts46_remap(s, std3_rules, False)
+    trailing_dot = False
+    result = []
+    if not strict:
+        labels = _unicode_dots_re.split(s)
+    else:
+        labels = s.split(u'.')
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if not labels[-1]:
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = ulabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append(u'')
+    return u'.'.join(result)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/idnadata.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/idnadata.py
new file mode 100644
index 00000000..a80c959d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/idnadata.py
@@ -0,0 +1,1979 @@
+# This file is automatically generated by tools/idna-data
+
+__version__ = "11.0.0"
+scripts = {
+    'Greek': (
+        0x37000000374,
+        0x37500000378,
+        0x37a0000037e,
+        0x37f00000380,
+        0x38400000385,
+        0x38600000387,
+        0x3880000038b,
+        0x38c0000038d,
+        0x38e000003a2,
+        0x3a3000003e2,
+        0x3f000000400,
+        0x1d2600001d2b,
+        0x1d5d00001d62,
+        0x1d6600001d6b,
+        0x1dbf00001dc0,
+        0x1f0000001f16,
+        0x1f1800001f1e,
+        0x1f2000001f46,
+        0x1f4800001f4e,
+        0x1f5000001f58,
+        0x1f5900001f5a,
+        0x1f5b00001f5c,
+        0x1f5d00001f5e,
+        0x1f5f00001f7e,
+        0x1f8000001fb5,
+        0x1fb600001fc5,
+        0x1fc600001fd4,
+        0x1fd600001fdc,
+        0x1fdd00001ff0,
+        0x1ff200001ff5,
+        0x1ff600001fff,
+        0x212600002127,
+        0xab650000ab66,
+        0x101400001018f,
+        0x101a0000101a1,
+        0x1d2000001d246,
+    ),
+    'Han': (
+        0x2e8000002e9a,
+        0x2e9b00002ef4,
+        0x2f0000002fd6,
+        0x300500003006,
+        0x300700003008,
+        0x30210000302a,
+        0x30380000303c,
+        0x340000004db6,
+        0x4e0000009ff0,
+        0xf9000000fa6e,
+        0xfa700000fada,
+        0x200000002a6d7,
+        0x2a7000002b735,
+        0x2b7400002b81e,
+        0x2b8200002cea2,
+        0x2ceb00002ebe1,
+        0x2f8000002fa1e,
+    ),
+    'Hebrew': (
+        0x591000005c8,
+        0x5d0000005eb,
+        0x5ef000005f5,
+        0xfb1d0000fb37,
+        0xfb380000fb3d,
+        0xfb3e0000fb3f,
+        0xfb400000fb42,
+        0xfb430000fb45,
+        0xfb460000fb50,
+    ),
+    'Hiragana': (
+        0x304100003097,
+        0x309d000030a0,
+        0x1b0010001b11f,
+        0x1f2000001f201,
+    ),
+    'Katakana': (
+        0x30a1000030fb,
+        0x30fd00003100,
+        0x31f000003200,
+        0x32d0000032ff,
+        0x330000003358,
+        0xff660000ff70,
+        0xff710000ff9e,
+        0x1b0000001b001,
+    ),
+}
+joining_types = {
+    0x600: 85,
+    0x601: 85,
+    0x602: 85,
+    0x603: 85,
+    0x604: 85,
+    0x605: 85,
+    0x608: 85,
+    0x60b: 85,
+    0x620: 68,
+    0x621: 85,
+    0x622: 82,
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+    0x625: 82,
+    0x626: 68,
+    0x627: 82,
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+    0x10d15: 68,
+    0x10d16: 68,
+    0x10d17: 68,
+    0x10d18: 68,
+    0x10d19: 68,
+    0x10d1a: 68,
+    0x10d1b: 68,
+    0x10d1c: 68,
+    0x10d1d: 68,
+    0x10d1e: 68,
+    0x10d1f: 68,
+    0x10d20: 68,
+    0x10d21: 68,
+    0x10d22: 82,
+    0x10d23: 68,
+    0x10f30: 68,
+    0x10f31: 68,
+    0x10f32: 68,
+    0x10f33: 82,
+    0x10f34: 68,
+    0x10f35: 68,
+    0x10f36: 68,
+    0x10f37: 68,
+    0x10f38: 68,
+    0x10f39: 68,
+    0x10f3a: 68,
+    0x10f3b: 68,
+    0x10f3c: 68,
+    0x10f3d: 68,
+    0x10f3e: 68,
+    0x10f3f: 68,
+    0x10f40: 68,
+    0x10f41: 68,
+    0x10f42: 68,
+    0x10f43: 68,
+    0x10f44: 68,
+    0x10f45: 85,
+    0x10f51: 68,
+    0x10f52: 68,
+    0x10f53: 68,
+    0x10f54: 82,
+    0x110bd: 85,
+    0x110cd: 85,
+    0x1e900: 68,
+    0x1e901: 68,
+    0x1e902: 68,
+    0x1e903: 68,
+    0x1e904: 68,
+    0x1e905: 68,
+    0x1e906: 68,
+    0x1e907: 68,
+    0x1e908: 68,
+    0x1e909: 68,
+    0x1e90a: 68,
+    0x1e90b: 68,
+    0x1e90c: 68,
+    0x1e90d: 68,
+    0x1e90e: 68,
+    0x1e90f: 68,
+    0x1e910: 68,
+    0x1e911: 68,
+    0x1e912: 68,
+    0x1e913: 68,
+    0x1e914: 68,
+    0x1e915: 68,
+    0x1e916: 68,
+    0x1e917: 68,
+    0x1e918: 68,
+    0x1e919: 68,
+    0x1e91a: 68,
+    0x1e91b: 68,
+    0x1e91c: 68,
+    0x1e91d: 68,
+    0x1e91e: 68,
+    0x1e91f: 68,
+    0x1e920: 68,
+    0x1e921: 68,
+    0x1e922: 68,
+    0x1e923: 68,
+    0x1e924: 68,
+    0x1e925: 68,
+    0x1e926: 68,
+    0x1e927: 68,
+    0x1e928: 68,
+    0x1e929: 68,
+    0x1e92a: 68,
+    0x1e92b: 68,
+    0x1e92c: 68,
+    0x1e92d: 68,
+    0x1e92e: 68,
+    0x1e92f: 68,
+    0x1e930: 68,
+    0x1e931: 68,
+    0x1e932: 68,
+    0x1e933: 68,
+    0x1e934: 68,
+    0x1e935: 68,
+    0x1e936: 68,
+    0x1e937: 68,
+    0x1e938: 68,
+    0x1e939: 68,
+    0x1e93a: 68,
+    0x1e93b: 68,
+    0x1e93c: 68,
+    0x1e93d: 68,
+    0x1e93e: 68,
+    0x1e93f: 68,
+    0x1e940: 68,
+    0x1e941: 68,
+    0x1e942: 68,
+    0x1e943: 68,
+}
+codepoint_classes = {
+    'PVALID': (
+        0x2d0000002e,
+        0x300000003a,
+        0x610000007b,
+        0xdf000000f7,
+        0xf800000100,
+        0x10100000102,
+        0x10300000104,
+        0x10500000106,
+        0x10700000108,
+        0x1090000010a,
+        0x10b0000010c,
+        0x10d0000010e,
+        0x10f00000110,
+        0x11100000112,
+        0x11300000114,
+        0x11500000116,
+        0x11700000118,
+        0x1190000011a,
+        0x11b0000011c,
+        0x11d0000011e,
+        0x11f00000120,
+        0x12100000122,
+        0x12300000124,
+        0x12500000126,
+        0x12700000128,
+        0x1290000012a,
+        0x12b0000012c,
+        0x12d0000012e,
+        0x12f00000130,
+        0x13100000132,
+        0x13500000136,
+        0x13700000139,
+        0x13a0000013b,
+        0x13c0000013d,
+        0x13e0000013f,
+        0x14200000143,
+        0x14400000145,
+        0x14600000147,
+        0x14800000149,
+        0x14b0000014c,
+        0x14d0000014e,
+        0x14f00000150,
+        0x15100000152,
+        0x15300000154,
+        0x15500000156,
+        0x15700000158,
+        0x1590000015a,
+        0x15b0000015c,
+        0x15d0000015e,
+        0x15f00000160,
+        0x16100000162,
+        0x16300000164,
+        0x16500000166,
+        0x16700000168,
+        0x1690000016a,
+        0x16b0000016c,
+        0x16d0000016e,
+        0x16f00000170,
+        0x17100000172,
+        0x17300000174,
+        0x17500000176,
+        0x17700000178,
+        0x17a0000017b,
+        0x17c0000017d,
+        0x17e0000017f,
+        0x18000000181,
+        0x18300000184,
+        0x18500000186,
+        0x18800000189,
+        0x18c0000018e,
+        0x19200000193,
+        0x19500000196,
+        0x1990000019c,
+        0x19e0000019f,
+        0x1a1000001a2,
+        0x1a3000001a4,
+        0x1a5000001a6,
+        0x1a8000001a9,
+        0x1aa000001ac,
+        0x1ad000001ae,
+        0x1b0000001b1,
+        0x1b4000001b5,
+        0x1b6000001b7,
+        0x1b9000001bc,
+        0x1bd000001c4,
+        0x1ce000001cf,
+        0x1d0000001d1,
+        0x1d2000001d3,
+        0x1d4000001d5,
+        0x1d6000001d7,
+        0x1d8000001d9,
+        0x1da000001db,
+        0x1dc000001de,
+        0x1df000001e0,
+        0x1e1000001e2,
+        0x1e3000001e4,
+        0x1e5000001e6,
+        0x1e7000001e8,
+        0x1e9000001ea,
+        0x1eb000001ec,
+        0x1ed000001ee,
+        0x1ef000001f1,
+        0x1f5000001f6,
+        0x1f9000001fa,
+        0x1fb000001fc,
+        0x1fd000001fe,
+        0x1ff00000200,
+        0x20100000202,
+        0x20300000204,
+        0x20500000206,
+        0x20700000208,
+        0x2090000020a,
+        0x20b0000020c,
+        0x20d0000020e,
+        0x20f00000210,
+        0x21100000212,
+        0x21300000214,
+        0x21500000216,
+        0x21700000218,
+        0x2190000021a,
+        0x21b0000021c,
+        0x21d0000021e,
+        0x21f00000220,
+        0x22100000222,
+        0x22300000224,
+        0x22500000226,
+        0x22700000228,
+        0x2290000022a,
+        0x22b0000022c,
+        0x22d0000022e,
+        0x22f00000230,
+        0x23100000232,
+        0x2330000023a,
+        0x23c0000023d,
+        0x23f00000241,
+        0x24200000243,
+        0x24700000248,
+        0x2490000024a,
+        0x24b0000024c,
+        0x24d0000024e,
+        0x24f000002b0,
+        0x2b9000002c2,
+        0x2c6000002d2,
+        0x2ec000002ed,
+        0x2ee000002ef,
+        0x30000000340,
+        0x34200000343,
+        0x3460000034f,
+        0x35000000370,
+        0x37100000372,
+        0x37300000374,
+        0x37700000378,
+        0x37b0000037e,
+        0x39000000391,
+        0x3ac000003cf,
+        0x3d7000003d8,
+        0x3d9000003da,
+        0x3db000003dc,
+        0x3dd000003de,
+        0x3df000003e0,
+        0x3e1000003e2,
+        0x3e3000003e4,
+        0x3e5000003e6,
+        0x3e7000003e8,
+        0x3e9000003ea,
+        0x3eb000003ec,
+        0x3ed000003ee,
+        0x3ef000003f0,
+        0x3f3000003f4,
+        0x3f8000003f9,
+        0x3fb000003fd,
+        0x43000000460,
+        0x46100000462,
+        0x46300000464,
+        0x46500000466,
+        0x46700000468,
+        0x4690000046a,
+        0x46b0000046c,
+        0x46d0000046e,
+        0x46f00000470,
+        0x47100000472,
+        0x47300000474,
+        0x47500000476,
+        0x47700000478,
+        0x4790000047a,
+        0x47b0000047c,
+        0x47d0000047e,
+        0x47f00000480,
+        0x48100000482,
+        0x48300000488,
+        0x48b0000048c,
+        0x48d0000048e,
+        0x48f00000490,
+        0x49100000492,
+        0x49300000494,
+        0x49500000496,
+        0x49700000498,
+        0x4990000049a,
+        0x49b0000049c,
+        0x49d0000049e,
+        0x49f000004a0,
+        0x4a1000004a2,
+        0x4a3000004a4,
+        0x4a5000004a6,
+        0x4a7000004a8,
+        0x4a9000004aa,
+        0x4ab000004ac,
+        0x4ad000004ae,
+        0x4af000004b0,
+        0x4b1000004b2,
+        0x4b3000004b4,
+        0x4b5000004b6,
+        0x4b7000004b8,
+        0x4b9000004ba,
+        0x4bb000004bc,
+        0x4bd000004be,
+        0x4bf000004c0,
+        0x4c2000004c3,
+        0x4c4000004c5,
+        0x4c6000004c7,
+        0x4c8000004c9,
+        0x4ca000004cb,
+        0x4cc000004cd,
+        0x4ce000004d0,
+        0x4d1000004d2,
+        0x4d3000004d4,
+        0x4d5000004d6,
+        0x4d7000004d8,
+        0x4d9000004da,
+        0x4db000004dc,
+        0x4dd000004de,
+        0x4df000004e0,
+        0x4e1000004e2,
+        0x4e3000004e4,
+        0x4e5000004e6,
+        0x4e7000004e8,
+        0x4e9000004ea,
+        0x4eb000004ec,
+        0x4ed000004ee,
+        0x4ef000004f0,
+        0x4f1000004f2,
+        0x4f3000004f4,
+        0x4f5000004f6,
+        0x4f7000004f8,
+        0x4f9000004fa,
+        0x4fb000004fc,
+        0x4fd000004fe,
+        0x4ff00000500,
+        0x50100000502,
+        0x50300000504,
+        0x50500000506,
+        0x50700000508,
+        0x5090000050a,
+        0x50b0000050c,
+        0x50d0000050e,
+        0x50f00000510,
+        0x51100000512,
+        0x51300000514,
+        0x51500000516,
+        0x51700000518,
+        0x5190000051a,
+        0x51b0000051c,
+        0x51d0000051e,
+        0x51f00000520,
+        0x52100000522,
+        0x52300000524,
+        0x52500000526,
+        0x52700000528,
+        0x5290000052a,
+        0x52b0000052c,
+        0x52d0000052e,
+        0x52f00000530,
+        0x5590000055a,
+        0x56000000587,
+        0x58800000589,
+        0x591000005be,
+        0x5bf000005c0,
+        0x5c1000005c3,
+        0x5c4000005c6,
+        0x5c7000005c8,
+        0x5d0000005eb,
+        0x5ef000005f3,
+        0x6100000061b,
+        0x62000000640,
+        0x64100000660,
+        0x66e00000675,
+        0x679000006d4,
+        0x6d5000006dd,
+        0x6df000006e9,
+        0x6ea000006f0,
+        0x6fa00000700,
+        0x7100000074b,
+        0x74d000007b2,
+        0x7c0000007f6,
+        0x7fd000007fe,
+        0x8000000082e,
+        0x8400000085c,
+        0x8600000086b,
+        0x8a0000008b5,
+        0x8b6000008be,
+        0x8d3000008e2,
+        0x8e300000958,
+        0x96000000964,
+        0x96600000970,
+        0x97100000984,
+        0x9850000098d,
+        0x98f00000991,
+        0x993000009a9,
+        0x9aa000009b1,
+        0x9b2000009b3,
+        0x9b6000009ba,
+        0x9bc000009c5,
+        0x9c7000009c9,
+        0x9cb000009cf,
+        0x9d7000009d8,
+        0x9e0000009e4,
+        0x9e6000009f2,
+        0x9fc000009fd,
+        0x9fe000009ff,
+        0xa0100000a04,
+        0xa0500000a0b,
+        0xa0f00000a11,
+        0xa1300000a29,
+        0xa2a00000a31,
+        0xa3200000a33,
+        0xa3500000a36,
+        0xa3800000a3a,
+        0xa3c00000a3d,
+        0xa3e00000a43,
+        0xa4700000a49,
+        0xa4b00000a4e,
+        0xa5100000a52,
+        0xa5c00000a5d,
+        0xa6600000a76,
+        0xa8100000a84,
+        0xa8500000a8e,
+        0xa8f00000a92,
+        0xa9300000aa9,
+        0xaaa00000ab1,
+        0xab200000ab4,
+        0xab500000aba,
+        0xabc00000ac6,
+        0xac700000aca,
+        0xacb00000ace,
+        0xad000000ad1,
+        0xae000000ae4,
+        0xae600000af0,
+        0xaf900000b00,
+        0xb0100000b04,
+        0xb0500000b0d,
+        0xb0f00000b11,
+        0xb1300000b29,
+        0xb2a00000b31,
+        0xb3200000b34,
+        0xb3500000b3a,
+        0xb3c00000b45,
+        0xb4700000b49,
+        0xb4b00000b4e,
+        0xb5600000b58,
+        0xb5f00000b64,
+        0xb6600000b70,
+        0xb7100000b72,
+        0xb8200000b84,
+        0xb8500000b8b,
+        0xb8e00000b91,
+        0xb9200000b96,
+        0xb9900000b9b,
+        0xb9c00000b9d,
+        0xb9e00000ba0,
+        0xba300000ba5,
+        0xba800000bab,
+        0xbae00000bba,
+        0xbbe00000bc3,
+        0xbc600000bc9,
+        0xbca00000bce,
+        0xbd000000bd1,
+        0xbd700000bd8,
+        0xbe600000bf0,
+        0xc0000000c0d,
+        0xc0e00000c11,
+        0xc1200000c29,
+        0xc2a00000c3a,
+        0xc3d00000c45,
+        0xc4600000c49,
+        0xc4a00000c4e,
+        0xc5500000c57,
+        0xc5800000c5b,
+        0xc6000000c64,
+        0xc6600000c70,
+        0xc8000000c84,
+        0xc8500000c8d,
+        0xc8e00000c91,
+        0xc9200000ca9,
+        0xcaa00000cb4,
+        0xcb500000cba,
+        0xcbc00000cc5,
+        0xcc600000cc9,
+        0xcca00000cce,
+        0xcd500000cd7,
+        0xcde00000cdf,
+        0xce000000ce4,
+        0xce600000cf0,
+        0xcf100000cf3,
+        0xd0000000d04,
+        0xd0500000d0d,
+        0xd0e00000d11,
+        0xd1200000d45,
+        0xd4600000d49,
+        0xd4a00000d4f,
+        0xd5400000d58,
+        0xd5f00000d64,
+        0xd6600000d70,
+        0xd7a00000d80,
+        0xd8200000d84,
+        0xd8500000d97,
+        0xd9a00000db2,
+        0xdb300000dbc,
+        0xdbd00000dbe,
+        0xdc000000dc7,
+        0xdca00000dcb,
+        0xdcf00000dd5,
+        0xdd600000dd7,
+        0xdd800000de0,
+        0xde600000df0,
+        0xdf200000df4,
+        0xe0100000e33,
+        0xe3400000e3b,
+        0xe4000000e4f,
+        0xe5000000e5a,
+        0xe8100000e83,
+        0xe8400000e85,
+        0xe8700000e89,
+        0xe8a00000e8b,
+        0xe8d00000e8e,
+        0xe9400000e98,
+        0xe9900000ea0,
+        0xea100000ea4,
+        0xea500000ea6,
+        0xea700000ea8,
+        0xeaa00000eac,
+        0xead00000eb3,
+        0xeb400000eba,
+        0xebb00000ebe,
+        0xec000000ec5,
+        0xec600000ec7,
+        0xec800000ece,
+        0xed000000eda,
+        0xede00000ee0,
+        0xf0000000f01,
+        0xf0b00000f0c,
+        0xf1800000f1a,
+        0xf2000000f2a,
+        0xf3500000f36,
+        0xf3700000f38,
+        0xf3900000f3a,
+        0xf3e00000f43,
+        0xf4400000f48,
+        0xf4900000f4d,
+        0xf4e00000f52,
+        0xf5300000f57,
+        0xf5800000f5c,
+        0xf5d00000f69,
+        0xf6a00000f6d,
+        0xf7100000f73,
+        0xf7400000f75,
+        0xf7a00000f81,
+        0xf8200000f85,
+        0xf8600000f93,
+        0xf9400000f98,
+        0xf9900000f9d,
+        0xf9e00000fa2,
+        0xfa300000fa7,
+        0xfa800000fac,
+        0xfad00000fb9,
+        0xfba00000fbd,
+        0xfc600000fc7,
+        0x10000000104a,
+        0x10500000109e,
+        0x10d0000010fb,
+        0x10fd00001100,
+        0x120000001249,
+        0x124a0000124e,
+        0x125000001257,
+        0x125800001259,
+        0x125a0000125e,
+        0x126000001289,
+        0x128a0000128e,
+        0x1290000012b1,
+        0x12b2000012b6,
+        0x12b8000012bf,
+        0x12c0000012c1,
+        0x12c2000012c6,
+        0x12c8000012d7,
+        0x12d800001311,
+        0x131200001316,
+        0x13180000135b,
+        0x135d00001360,
+        0x138000001390,
+        0x13a0000013f6,
+        0x14010000166d,
+        0x166f00001680,
+        0x16810000169b,
+        0x16a0000016eb,
+        0x16f1000016f9,
+        0x17000000170d,
+        0x170e00001715,
+        0x172000001735,
+        0x174000001754,
+        0x17600000176d,
+        0x176e00001771,
+        0x177200001774,
+        0x1780000017b4,
+        0x17b6000017d4,
+        0x17d7000017d8,
+        0x17dc000017de,
+        0x17e0000017ea,
+        0x18100000181a,
+        0x182000001879,
+        0x1880000018ab,
+        0x18b0000018f6,
+        0x19000000191f,
+        0x19200000192c,
+        0x19300000193c,
+        0x19460000196e,
+        0x197000001975,
+        0x1980000019ac,
+        0x19b0000019ca,
+        0x19d0000019da,
+        0x1a0000001a1c,
+        0x1a2000001a5f,
+        0x1a6000001a7d,
+        0x1a7f00001a8a,
+        0x1a9000001a9a,
+        0x1aa700001aa8,
+        0x1ab000001abe,
+        0x1b0000001b4c,
+        0x1b5000001b5a,
+        0x1b6b00001b74,
+        0x1b8000001bf4,
+        0x1c0000001c38,
+        0x1c4000001c4a,
+        0x1c4d00001c7e,
+        0x1cd000001cd3,
+        0x1cd400001cfa,
+        0x1d0000001d2c,
+        0x1d2f00001d30,
+        0x1d3b00001d3c,
+        0x1d4e00001d4f,
+        0x1d6b00001d78,
+        0x1d7900001d9b,
+        0x1dc000001dfa,
+        0x1dfb00001e00,
+        0x1e0100001e02,
+        0x1e0300001e04,
+        0x1e0500001e06,
+        0x1e0700001e08,
+        0x1e0900001e0a,
+        0x1e0b00001e0c,
+        0x1e0d00001e0e,
+        0x1e0f00001e10,
+        0x1e1100001e12,
+        0x1e1300001e14,
+        0x1e1500001e16,
+        0x1e1700001e18,
+        0x1e1900001e1a,
+        0x1e1b00001e1c,
+        0x1e1d00001e1e,
+        0x1e1f00001e20,
+        0x1e2100001e22,
+        0x1e2300001e24,
+        0x1e2500001e26,
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+    ),
+    'CONTEXTJ': (
+        0x200c0000200e,
+    ),
+    'CONTEXTO': (
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+        0x5f3000005f5,
+        0x6600000066a,
+        0x6f0000006fa,
+        0x30fb000030fc,
+    ),
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/intranges.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/intranges.py
new file mode 100644
index 00000000..fa8a7356
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/intranges.py
@@ -0,0 +1,53 @@
+"""
+Given a list of integers, made up of (hopefully) a small number of long runs
+of consecutive integers, compute a representation of the form
+((start1, end1), (start2, end2) ...). Then answer the question "was x present
+in the original list?" in time O(log(# runs)).
+"""
+
+import bisect
+
+def intranges_from_list(list_):
+    """Represent a list of integers as a sequence of ranges:
+    ((start_0, end_0), (start_1, end_1), ...), such that the original
+    integers are exactly those x such that start_i <= x < end_i for some i.
+
+    Ranges are encoded as single integers (start << 32 | end), not as tuples.
+    """
+
+    sorted_list = sorted(list_)
+    ranges = []
+    last_write = -1
+    for i in range(len(sorted_list)):
+        if i+1 < len(sorted_list):
+            if sorted_list[i] == sorted_list[i+1]-1:
+                continue
+        current_range = sorted_list[last_write+1:i+1]
+        ranges.append(_encode_range(current_range[0], current_range[-1] + 1))
+        last_write = i
+
+    return tuple(ranges)
+
+def _encode_range(start, end):
+    return (start << 32) | end
+
+def _decode_range(r):
+    return (r >> 32), (r & ((1 << 32) - 1))
+
+
+def intranges_contain(int_, ranges):
+    """Determine if `int_` falls into one of the ranges in `ranges`."""
+    tuple_ = _encode_range(int_, 0)
+    pos = bisect.bisect_left(ranges, tuple_)
+    # we could be immediately ahead of a tuple (start, end)
+    # with start < int_ <= end
+    if pos > 0:
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+        if left <= int_ < right:
+            return True
+    # or we could be immediately behind a tuple (int_, end)
+    if pos < len(ranges):
+        left, _ = _decode_range(ranges[pos])
+        if left == int_:
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+    return False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/package_data.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/package_data.py
new file mode 100644
index 00000000..257e8989
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/package_data.py
@@ -0,0 +1,2 @@
+__version__ = '2.8'
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/uts46data.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/uts46data.py
new file mode 100644
index 00000000..a68ed4c0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/idna/uts46data.py
@@ -0,0 +1,8205 @@
+# This file is automatically generated by tools/idna-data
+# vim: set fileencoding=utf-8 :
+
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/ipaddress.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/ipaddress.py
new file mode 100644
index 00000000..f2d07668
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@@ -0,0 +1,2419 @@
+# Copyright 2007 Google Inc.
+#  Licensed to PSF under a Contributor Agreement.
+
+"""A fast, lightweight IPv4/IPv6 manipulation library in Python.
+
+This library is used to create/poke/manipulate IPv4 and IPv6 addresses
+and networks.
+
+"""
+
+from __future__ import unicode_literals
+
+
+import itertools
+import struct
+
+__version__ = '1.0.22'
+
+# Compatibility functions
+_compat_int_types = (int,)
+try:
+    _compat_int_types = (int, long)
+except NameError:
+    pass
+try:
+    _compat_str = unicode
+except NameError:
+    _compat_str = str
+    assert bytes != str
+if b'\0'[0] == 0:  # Python 3 semantics
+    def _compat_bytes_to_byte_vals(byt):
+        return byt
+else:
+    def _compat_bytes_to_byte_vals(byt):
+        return [struct.unpack(b'!B', b)[0] for b in byt]
+try:
+    _compat_int_from_byte_vals = int.from_bytes
+except AttributeError:
+    def _compat_int_from_byte_vals(bytvals, endianess):
+        assert endianess == 'big'
+        res = 0
+        for bv in bytvals:
+            assert isinstance(bv, _compat_int_types)
+            res = (res << 8) + bv
+        return res
+
+
+def _compat_to_bytes(intval, length, endianess):
+    assert isinstance(intval, _compat_int_types)
+    assert endianess == 'big'
+    if length == 4:
+        if intval < 0 or intval >= 2 ** 32:
+            raise struct.error("integer out of range for 'I' format code")
+        return struct.pack(b'!I', intval)
+    elif length == 16:
+        if intval < 0 or intval >= 2 ** 128:
+            raise struct.error("integer out of range for 'QQ' format code")
+        return struct.pack(b'!QQ', intval >> 64, intval & 0xffffffffffffffff)
+    else:
+        raise NotImplementedError()
+
+
+if hasattr(int, 'bit_length'):
+    # Not int.bit_length , since that won't work in 2.7 where long exists
+    def _compat_bit_length(i):
+        return i.bit_length()
+else:
+    def _compat_bit_length(i):
+        for res in itertools.count():
+            if i >> res == 0:
+                return res
+
+
+def _compat_range(start, end, step=1):
+    assert step > 0
+    i = start
+    while i < end:
+        yield i
+        i += step
+
+
+class _TotalOrderingMixin(object):
+    __slots__ = ()
+
+    # Helper that derives the other comparison operations from
+    # __lt__ and __eq__
+    # We avoid functools.total_ordering because it doesn't handle
+    # NotImplemented correctly yet (http://bugs.python.org/issue10042)
+    def __eq__(self, other):
+        raise NotImplementedError
+
+    def __ne__(self, other):
+        equal = self.__eq__(other)
+        if equal is NotImplemented:
+            return NotImplemented
+        return not equal
+
+    def __lt__(self, other):
+        raise NotImplementedError
+
+    def __le__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented or not less:
+            return self.__eq__(other)
+        return less
+
+    def __gt__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented:
+            return NotImplemented
+        equal = self.__eq__(other)
+        if equal is NotImplemented:
+            return NotImplemented
+        return not (less or equal)
+
+    def __ge__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented:
+            return NotImplemented
+        return not less
+
+
+IPV4LENGTH = 32
+IPV6LENGTH = 128
+
+
+class AddressValueError(ValueError):
+    """A Value Error related to the address."""
+
+
+class NetmaskValueError(ValueError):
+    """A Value Error related to the netmask."""
+
+
+def ip_address(address):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP address.  Either IPv4 or
+          IPv6 addresses may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Address or IPv6Address object.
+
+    Raises:
+        ValueError: if the *address* passed isn't either a v4 or a v6
+          address
+
+    """
+    try:
+        return IPv4Address(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Address(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    if isinstance(address, bytes):
+        raise AddressValueError(
+            '%r does not appear to be an IPv4 or IPv6 address. '
+            'Did you pass in a bytes (str in Python 2) instead of'
+            ' a unicode object?' % address)
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 address' %
+                     address)
+
+
+def ip_network(address, strict=True):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP network.  Either IPv4 or
+          IPv6 networks may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Network or IPv6Network object.
+
+    Raises:
+        ValueError: if the string passed isn't either a v4 or a v6
+          address. Or if the network has host bits set.
+
+    """
+    try:
+        return IPv4Network(address, strict)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Network(address, strict)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    if isinstance(address, bytes):
+        raise AddressValueError(
+            '%r does not appear to be an IPv4 or IPv6 network. '
+            'Did you pass in a bytes (str in Python 2) instead of'
+            ' a unicode object?' % address)
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 network' %
+                     address)
+
+
+def ip_interface(address):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP address.  Either IPv4 or
+          IPv6 addresses may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Interface or IPv6Interface object.
+
+    Raises:
+        ValueError: if the string passed isn't either a v4 or a v6
+          address.
+
+    Notes:
+        The IPv?Interface classes describe an Address on a particular
+        Network, so they're basically a combination of both the Address
+        and Network classes.
+
+    """
+    try:
+        return IPv4Interface(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Interface(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 interface' %
+                     address)
+
+
+def v4_int_to_packed(address):
+    """Represent an address as 4 packed bytes in network (big-endian) order.
+
+    Args:
+        address: An integer representation of an IPv4 IP address.
+
+    Returns:
+        The integer address packed as 4 bytes in network (big-endian) order.
+
+    Raises:
+        ValueError: If the integer is negative or too large to be an
+          IPv4 IP address.
+
+    """
+    try:
+        return _compat_to_bytes(address, 4, 'big')
+    except (struct.error, OverflowError):
+        raise ValueError("Address negative or too large for IPv4")
+
+
+def v6_int_to_packed(address):
+    """Represent an address as 16 packed bytes in network (big-endian) order.
+
+    Args:
+        address: An integer representation of an IPv6 IP address.
+
+    Returns:
+        The integer address packed as 16 bytes in network (big-endian) order.
+
+    """
+    try:
+        return _compat_to_bytes(address, 16, 'big')
+    except (struct.error, OverflowError):
+        raise ValueError("Address negative or too large for IPv6")
+
+
+def _split_optional_netmask(address):
+    """Helper to split the netmask and raise AddressValueError if needed"""
+    addr = _compat_str(address).split('/')
+    if len(addr) > 2:
+        raise AddressValueError("Only one '/' permitted in %r" % address)
+    return addr
+
+
+def _find_address_range(addresses):
+    """Find a sequence of sorted deduplicated IPv#Address.
+
+    Args:
+        addresses: a list of IPv#Address objects.
+
+    Yields:
+        A tuple containing the first and last IP addresses in the sequence.
+
+    """
+    it = iter(addresses)
+    first = last = next(it)
+    for ip in it:
+        if ip._ip != last._ip + 1:
+            yield first, last
+            first = ip
+        last = ip
+    yield first, last
+
+
+def _count_righthand_zero_bits(number, bits):
+    """Count the number of zero bits on the right hand side.
+
+    Args:
+        number: an integer.
+        bits: maximum number of bits to count.
+
+    Returns:
+        The number of zero bits on the right hand side of the number.
+
+    """
+    if number == 0:
+        return bits
+    return min(bits, _compat_bit_length(~number & (number - 1)))
+
+
+def summarize_address_range(first, last):
+    """Summarize a network range given the first and last IP addresses.
+
+    Example:
+        >>> list(summarize_address_range(IPv4Address('192.0.2.0'),
+        ...                              IPv4Address('192.0.2.130')))
+        ...                                #doctest: +NORMALIZE_WHITESPACE
+        [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'),
+         IPv4Network('192.0.2.130/32')]
+
+    Args:
+        first: the first IPv4Address or IPv6Address in the range.
+        last: the last IPv4Address or IPv6Address in the range.
+
+    Returns:
+        An iterator of the summarized IPv(4|6) network objects.
+
+    Raise:
+        TypeError:
+            If the first and last objects are not IP addresses.
+            If the first and last objects are not the same version.
+        ValueError:
+            If the last object is not greater than the first.
+            If the version of the first address is not 4 or 6.
+
+    """
+    if (not (isinstance(first, _BaseAddress) and
+             isinstance(last, _BaseAddress))):
+        raise TypeError('first and last must be IP addresses, not networks')
+    if first.version != last.version:
+        raise TypeError("%s and %s are not of the same version" % (
+                        first, last))
+    if first > last:
+        raise ValueError('last IP address must be greater than first')
+
+    if first.version == 4:
+        ip = IPv4Network
+    elif first.version == 6:
+        ip = IPv6Network
+    else:
+        raise ValueError('unknown IP version')
+
+    ip_bits = first._max_prefixlen
+    first_int = first._ip
+    last_int = last._ip
+    while first_int <= last_int:
+        nbits = min(_count_righthand_zero_bits(first_int, ip_bits),
+                    _compat_bit_length(last_int - first_int + 1) - 1)
+        net = ip((first_int, ip_bits - nbits))
+        yield net
+        first_int += 1 << nbits
+        if first_int - 1 == ip._ALL_ONES:
+            break
+
+
+def _collapse_addresses_internal(addresses):
+    """Loops through the addresses, collapsing concurrent netblocks.
+
+    Example:
+
+        ip1 = IPv4Network('192.0.2.0/26')
+        ip2 = IPv4Network('192.0.2.64/26')
+        ip3 = IPv4Network('192.0.2.128/26')
+        ip4 = IPv4Network('192.0.2.192/26')
+
+        _collapse_addresses_internal([ip1, ip2, ip3, ip4]) ->
+          [IPv4Network('192.0.2.0/24')]
+
+        This shouldn't be called directly; it is called via
+          collapse_addresses([]).
+
+    Args:
+        addresses: A list of IPv4Network's or IPv6Network's
+
+    Returns:
+        A list of IPv4Network's or IPv6Network's depending on what we were
+        passed.
+
+    """
+    # First merge
+    to_merge = list(addresses)
+    subnets = {}
+    while to_merge:
+        net = to_merge.pop()
+        supernet = net.supernet()
+        existing = subnets.get(supernet)
+        if existing is None:
+            subnets[supernet] = net
+        elif existing != net:
+            # Merge consecutive subnets
+            del subnets[supernet]
+            to_merge.append(supernet)
+    # Then iterate over resulting networks, skipping subsumed subnets
+    last = None
+    for net in sorted(subnets.values()):
+        if last is not None:
+            # Since they are sorted,
+            # last.network_address <= net.network_address is a given.
+            if last.broadcast_address >= net.broadcast_address:
+                continue
+        yield net
+        last = net
+
+
+def collapse_addresses(addresses):
+    """Collapse a list of IP objects.
+
+    Example:
+        collapse_addresses([IPv4Network('192.0.2.0/25'),
+                            IPv4Network('192.0.2.128/25')]) ->
+                           [IPv4Network('192.0.2.0/24')]
+
+    Args:
+        addresses: An iterator of IPv4Network or IPv6Network objects.
+
+    Returns:
+        An iterator of the collapsed IPv(4|6)Network objects.
+
+    Raises:
+        TypeError: If passed a list of mixed version objects.
+
+    """
+    addrs = []
+    ips = []
+    nets = []
+
+    # split IP addresses and networks
+    for ip in addresses:
+        if isinstance(ip, _BaseAddress):
+            if ips and ips[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, ips[-1]))
+            ips.append(ip)
+        elif ip._prefixlen == ip._max_prefixlen:
+            if ips and ips[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, ips[-1]))
+            try:
+                ips.append(ip.ip)
+            except AttributeError:
+                ips.append(ip.network_address)
+        else:
+            if nets and nets[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, nets[-1]))
+            nets.append(ip)
+
+    # sort and dedup
+    ips = sorted(set(ips))
+
+    # find consecutive address ranges in the sorted sequence and summarize them
+    if ips:
+        for first, last in _find_address_range(ips):
+            addrs.extend(summarize_address_range(first, last))
+
+    return _collapse_addresses_internal(addrs + nets)
+
+
+def get_mixed_type_key(obj):
+    """Return a key suitable for sorting between networks and addresses.
+
+    Address and Network objects are not sortable by default; they're
+    fundamentally different so the expression
+
+        IPv4Address('192.0.2.0') <= IPv4Network('192.0.2.0/24')
+
+    doesn't make any sense.  There are some times however, where you may wish
+    to have ipaddress sort these for you anyway. If you need to do this, you
+    can use this function as the key= argument to sorted().
+
+    Args:
+      obj: either a Network or Address object.
+    Returns:
+      appropriate key.
+
+    """
+    if isinstance(obj, _BaseNetwork):
+        return obj._get_networks_key()
+    elif isinstance(obj, _BaseAddress):
+        return obj._get_address_key()
+    return NotImplemented
+
+
+class _IPAddressBase(_TotalOrderingMixin):
+
+    """The mother class."""
+
+    __slots__ = ()
+
+    @property
+    def exploded(self):
+        """Return the longhand version of the IP address as a string."""
+        return self._explode_shorthand_ip_string()
+
+    @property
+    def compressed(self):
+        """Return the shorthand version of the IP address as a string."""
+        return _compat_str(self)
+
+    @property
+    def reverse_pointer(self):
+        """The name of the reverse DNS pointer for the IP address, e.g.:
+            >>> ipaddress.ip_address("127.0.0.1").reverse_pointer
+            '1.0.0.127.in-addr.arpa'
+            >>> ipaddress.ip_address("2001:db8::1").reverse_pointer
+            '1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa'
+
+        """
+        return self._reverse_pointer()
+
+    @property
+    def version(self):
+        msg = '%200s has no version specified' % (type(self),)
+        raise NotImplementedError(msg)
+
+    def _check_int_address(self, address):
+        if address < 0:
+            msg = "%d (< 0) is not permitted as an IPv%d address"
+            raise AddressValueError(msg % (address, self._version))
+        if address > self._ALL_ONES:
+            msg = "%d (>= 2**%d) is not permitted as an IPv%d address"
+            raise AddressValueError(msg % (address, self._max_prefixlen,
+                                           self._version))
+
+    def _check_packed_address(self, address, expected_len):
+        address_len = len(address)
+        if address_len != expected_len:
+            msg = (
+                '%r (len %d != %d) is not permitted as an IPv%d address. '
+                'Did you pass in a bytes (str in Python 2) instead of'
+                ' a unicode object?')
+            raise AddressValueError(msg % (address, address_len,
+                                           expected_len, self._version))
+
+    @classmethod
+    def _ip_int_from_prefix(cls, prefixlen):
+        """Turn the prefix length into a bitwise netmask
+
+        Args:
+            prefixlen: An integer, the prefix length.
+
+        Returns:
+            An integer.
+
+        """
+        return cls._ALL_ONES ^ (cls._ALL_ONES >> prefixlen)
+
+    @classmethod
+    def _prefix_from_ip_int(cls, ip_int):
+        """Return prefix length from the bitwise netmask.
+
+        Args:
+            ip_int: An integer, the netmask in expanded bitwise format
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            ValueError: If the input intermingles zeroes & ones
+        """
+        trailing_zeroes = _count_righthand_zero_bits(ip_int,
+                                                     cls._max_prefixlen)
+        prefixlen = cls._max_prefixlen - trailing_zeroes
+        leading_ones = ip_int >> trailing_zeroes
+        all_ones = (1 << prefixlen) - 1
+        if leading_ones != all_ones:
+            byteslen = cls._max_prefixlen // 8
+            details = _compat_to_bytes(ip_int, byteslen, 'big')
+            msg = 'Netmask pattern %r mixes zeroes & ones'
+            raise ValueError(msg % details)
+        return prefixlen
+
+    @classmethod
+    def _report_invalid_netmask(cls, netmask_str):
+        msg = '%r is not a valid netmask' % netmask_str
+        raise NetmaskValueError(msg)
+
+    @classmethod
+    def _prefix_from_prefix_string(cls, prefixlen_str):
+        """Return prefix length from a numeric string
+
+        Args:
+            prefixlen_str: The string to be converted
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            NetmaskValueError: If the input is not a valid netmask
+        """
+        # int allows a leading +/- as well as surrounding whitespace,
+        # so we ensure that isn't the case
+        if not _BaseV4._DECIMAL_DIGITS.issuperset(prefixlen_str):
+            cls._report_invalid_netmask(prefixlen_str)
+        try:
+            prefixlen = int(prefixlen_str)
+        except ValueError:
+            cls._report_invalid_netmask(prefixlen_str)
+        if not (0 <= prefixlen <= cls._max_prefixlen):
+            cls._report_invalid_netmask(prefixlen_str)
+        return prefixlen
+
+    @classmethod
+    def _prefix_from_ip_string(cls, ip_str):
+        """Turn a netmask/hostmask string into a prefix length
+
+        Args:
+            ip_str: The netmask/hostmask to be converted
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            NetmaskValueError: If the input is not a valid netmask/hostmask
+        """
+        # Parse the netmask/hostmask like an IP address.
+        try:
+            ip_int = cls._ip_int_from_string(ip_str)
+        except AddressValueError:
+            cls._report_invalid_netmask(ip_str)
+
+        # Try matching a netmask (this would be /1*0*/ as a bitwise regexp).
+        # Note that the two ambiguous cases (all-ones and all-zeroes) are
+        # treated as netmasks.
+        try:
+            return cls._prefix_from_ip_int(ip_int)
+        except ValueError:
+            pass
+
+        # Invert the bits, and try matching a /0+1+/ hostmask instead.
+        ip_int ^= cls._ALL_ONES
+        try:
+            return cls._prefix_from_ip_int(ip_int)
+        except ValueError:
+            cls._report_invalid_netmask(ip_str)
+
+    def __reduce__(self):
+        return self.__class__, (_compat_str(self),)
+
+
+class _BaseAddress(_IPAddressBase):
+
+    """A generic IP object.
+
+    This IP class contains the version independent methods which are
+    used by single IP addresses.
+    """
+
+    __slots__ = ()
+
+    def __int__(self):
+        return self._ip
+
+    def __eq__(self, other):
+        try:
+            return (self._ip == other._ip and
+                    self._version == other._version)
+        except AttributeError:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if not isinstance(other, _IPAddressBase):
+            return NotImplemented
+        if not isinstance(other, _BaseAddress):
+            raise TypeError('%s and %s are not of the same type' % (
+                self, other))
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same version' % (
+                self, other))
+        if self._ip != other._ip:
+            return self._ip < other._ip
+        return False
+
+    # Shorthand for Integer addition and subtraction. This is not
+    # meant to ever support addition/subtraction of addresses.
+    def __add__(self, other):
+        if not isinstance(other, _compat_int_types):
+            return NotImplemented
+        return self.__class__(int(self) + other)
+
+    def __sub__(self, other):
+        if not isinstance(other, _compat_int_types):
+            return NotImplemented
+        return self.__class__(int(self) - other)
+
+    def __repr__(self):
+        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
+
+    def __str__(self):
+        return _compat_str(self._string_from_ip_int(self._ip))
+
+    def __hash__(self):
+        return hash(hex(int(self._ip)))
+
+    def _get_address_key(self):
+        return (self._version, self)
+
+    def __reduce__(self):
+        return self.__class__, (self._ip,)
+
+
+class _BaseNetwork(_IPAddressBase):
+
+    """A generic IP network object.
+
+    This IP class contains the version independent methods which are
+    used by networks.
+
+    """
+    def __init__(self, address):
+        self._cache = {}
+
+    def __repr__(self):
+        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
+
+    def __str__(self):
+        return '%s/%d' % (self.network_address, self.prefixlen)
+
+    def hosts(self):
+        """Generate Iterator over usable hosts in a network.
+
+        This is like __iter__ except it doesn't return the network
+        or broadcast addresses.
+
+        """
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network + 1, broadcast):
+            yield self._address_class(x)
+
+    def __iter__(self):
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network, broadcast + 1):
+            yield self._address_class(x)
+
+    def __getitem__(self, n):
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        if n >= 0:
+            if network + n > broadcast:
+                raise IndexError('address out of range')
+            return self._address_class(network + n)
+        else:
+            n += 1
+            if broadcast + n < network:
+                raise IndexError('address out of range')
+            return self._address_class(broadcast + n)
+
+    def __lt__(self, other):
+        if not isinstance(other, _IPAddressBase):
+            return NotImplemented
+        if not isinstance(other, _BaseNetwork):
+            raise TypeError('%s and %s are not of the same type' % (
+                            self, other))
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same version' % (
+                            self, other))
+        if self.network_address != other.network_address:
+            return self.network_address < other.network_address
+        if self.netmask != other.netmask:
+            return self.netmask < other.netmask
+        return False
+
+    def __eq__(self, other):
+        try:
+            return (self._version == other._version and
+                    self.network_address == other.network_address and
+                    int(self.netmask) == int(other.netmask))
+        except AttributeError:
+            return NotImplemented
+
+    def __hash__(self):
+        return hash(int(self.network_address) ^ int(self.netmask))
+
+    def __contains__(self, other):
+        # always false if one is v4 and the other is v6.
+        if self._version != other._version:
+            return False
+        # dealing with another network.
+        if isinstance(other, _BaseNetwork):
+            return False
+        # dealing with another address
+        else:
+            # address
+            return (int(self.network_address) <= int(other._ip) <=
+                    int(self.broadcast_address))
+
+    def overlaps(self, other):
+        """Tell if self is partly contained in other."""
+        return self.network_address in other or (
+            self.broadcast_address in other or (
+                other.network_address in self or (
+                    other.broadcast_address in self)))
+
+    @property
+    def broadcast_address(self):
+        x = self._cache.get('broadcast_address')
+        if x is None:
+            x = self._address_class(int(self.network_address) |
+                                    int(self.hostmask))
+            self._cache['broadcast_address'] = x
+        return x
+
+    @property
+    def hostmask(self):
+        x = self._cache.get('hostmask')
+        if x is None:
+            x = self._address_class(int(self.netmask) ^ self._ALL_ONES)
+            self._cache['hostmask'] = x
+        return x
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%d' % (self.network_address, self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self.network_address, self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self.network_address, self.hostmask)
+
+    @property
+    def num_addresses(self):
+        """Number of hosts in the current subnet."""
+        return int(self.broadcast_address) - int(self.network_address) + 1
+
+    @property
+    def _address_class(self):
+        # Returning bare address objects (rather than interfaces) allows for
+        # more consistent behaviour across the network address, broadcast
+        # address and individual host addresses.
+        msg = '%200s has no associated address class' % (type(self),)
+        raise NotImplementedError(msg)
+
+    @property
+    def prefixlen(self):
+        return self._prefixlen
+
+    def address_exclude(self, other):
+        """Remove an address from a larger block.
+
+        For example:
+
+            addr1 = ip_network('192.0.2.0/28')
+            addr2 = ip_network('192.0.2.1/32')
+            list(addr1.address_exclude(addr2)) =
+                [IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'),
+                 IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')]
+
+        or IPv6:
+
+            addr1 = ip_network('2001:db8::1/32')
+            addr2 = ip_network('2001:db8::1/128')
+            list(addr1.address_exclude(addr2)) =
+                [ip_network('2001:db8::1/128'),
+                 ip_network('2001:db8::2/127'),
+                 ip_network('2001:db8::4/126'),
+                 ip_network('2001:db8::8/125'),
+                 ...
+                 ip_network('2001:db8:8000::/33')]
+
+        Args:
+            other: An IPv4Network or IPv6Network object of the same type.
+
+        Returns:
+            An iterator of the IPv(4|6)Network objects which is self
+            minus other.
+
+        Raises:
+            TypeError: If self and other are of differing address
+              versions, or if other is not a network object.
+            ValueError: If other is not completely contained by self.
+
+        """
+        if not self._version == other._version:
+            raise TypeError("%s and %s are not of the same version" % (
+                            self, other))
+
+        if not isinstance(other, _BaseNetwork):
+            raise TypeError("%s is not a network object" % other)
+
+        if not other.subnet_of(self):
+            raise ValueError('%s not contained in %s' % (other, self))
+        if other == self:
+            return
+
+        # Make sure we're comparing the network of other.
+        other = other.__class__('%s/%s' % (other.network_address,
+                                           other.prefixlen))
+
+        s1, s2 = self.subnets()
+        while s1 != other and s2 != other:
+            if other.subnet_of(s1):
+                yield s2
+                s1, s2 = s1.subnets()
+            elif other.subnet_of(s2):
+                yield s1
+                s1, s2 = s2.subnets()
+            else:
+                # If we got here, there's a bug somewhere.
+                raise AssertionError('Error performing exclusion: '
+                                     's1: %s s2: %s other: %s' %
+                                     (s1, s2, other))
+        if s1 == other:
+            yield s2
+        elif s2 == other:
+            yield s1
+        else:
+            # If we got here, there's a bug somewhere.
+            raise AssertionError('Error performing exclusion: '
+                                 's1: %s s2: %s other: %s' %
+                                 (s1, s2, other))
+
+    def compare_networks(self, other):
+        """Compare two IP objects.
+
+        This is only concerned about the comparison of the integer
+        representation of the network addresses.  This means that the
+        host bits aren't considered at all in this method.  If you want
+        to compare host bits, you can easily enough do a
+        'HostA._ip < HostB._ip'
+
+        Args:
+            other: An IP object.
+
+        Returns:
+            If the IP versions of self and other are the same, returns:
+
+            -1 if self < other:
+              eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25')
+              IPv6Network('2001:db8::1000/124') <
+                  IPv6Network('2001:db8::2000/124')
+            0 if self == other
+              eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24')
+              IPv6Network('2001:db8::1000/124') ==
+                  IPv6Network('2001:db8::1000/124')
+            1 if self > other
+              eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25')
+                  IPv6Network('2001:db8::2000/124') >
+                      IPv6Network('2001:db8::1000/124')
+
+          Raises:
+              TypeError if the IP versions are different.
+
+        """
+        # does this need to raise a ValueError?
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same type' % (
+                            self, other))
+        # self._version == other._version below here:
+        if self.network_address < other.network_address:
+            return -1
+        if self.network_address > other.network_address:
+            return 1
+        # self.network_address == other.network_address below here:
+        if self.netmask < other.netmask:
+            return -1
+        if self.netmask > other.netmask:
+            return 1
+        return 0
+
+    def _get_networks_key(self):
+        """Network-only key function.
+
+        Returns an object that identifies this address' network and
+        netmask. This function is a suitable "key" argument for sorted()
+        and list.sort().
+
+        """
+        return (self._version, self.network_address, self.netmask)
+
+    def subnets(self, prefixlen_diff=1, new_prefix=None):
+        """The subnets which join to make the current subnet.
+
+        In the case that self contains only one IP
+        (self._prefixlen == 32 for IPv4 or self._prefixlen == 128
+        for IPv6), yield an iterator with just ourself.
+
+        Args:
+            prefixlen_diff: An integer, the amount the prefix length
+              should be increased by. This should not be set if
+              new_prefix is also set.
+            new_prefix: The desired new prefix length. This must be a
+              larger number (smaller prefix) than the existing prefix.
+              This should not be set if prefixlen_diff is also set.
+
+        Returns:
+            An iterator of IPv(4|6) objects.
+
+        Raises:
+            ValueError: The prefixlen_diff is too small or too large.
+                OR
+            prefixlen_diff and new_prefix are both set or new_prefix
+              is a smaller number than the current prefix (smaller
+              number means a larger network)
+
+        """
+        if self._prefixlen == self._max_prefixlen:
+            yield self
+            return
+
+        if new_prefix is not None:
+            if new_prefix < self._prefixlen:
+                raise ValueError('new prefix must be longer')
+            if prefixlen_diff != 1:
+                raise ValueError('cannot set prefixlen_diff and new_prefix')
+            prefixlen_diff = new_prefix - self._prefixlen
+
+        if prefixlen_diff < 0:
+            raise ValueError('prefix length diff must be > 0')
+        new_prefixlen = self._prefixlen + prefixlen_diff
+
+        if new_prefixlen > self._max_prefixlen:
+            raise ValueError(
+                'prefix length diff %d is invalid for netblock %s' % (
+                    new_prefixlen, self))
+
+        start = int(self.network_address)
+        end = int(self.broadcast_address) + 1
+        step = (int(self.hostmask) + 1) >> prefixlen_diff
+        for new_addr in _compat_range(start, end, step):
+            current = self.__class__((new_addr, new_prefixlen))
+            yield current
+
+    def supernet(self, prefixlen_diff=1, new_prefix=None):
+        """The supernet containing the current network.
+
+        Args:
+            prefixlen_diff: An integer, the amount the prefix length of
+              the network should be decreased by.  For example, given a
+              /24 network and a prefixlen_diff of 3, a supernet with a
+              /21 netmask is returned.
+
+        Returns:
+            An IPv4 network object.
+
+        Raises:
+            ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have
+              a negative prefix length.
+                OR
+            If prefixlen_diff and new_prefix are both set or new_prefix is a
+              larger number than the current prefix (larger number means a
+              smaller network)
+
+        """
+        if self._prefixlen == 0:
+            return self
+
+        if new_prefix is not None:
+            if new_prefix > self._prefixlen:
+                raise ValueError('new prefix must be shorter')
+            if prefixlen_diff != 1:
+                raise ValueError('cannot set prefixlen_diff and new_prefix')
+            prefixlen_diff = self._prefixlen - new_prefix
+
+        new_prefixlen = self.prefixlen - prefixlen_diff
+        if new_prefixlen < 0:
+            raise ValueError(
+                'current prefixlen is %d, cannot have a prefixlen_diff of %d' %
+                (self.prefixlen, prefixlen_diff))
+        return self.__class__((
+            int(self.network_address) & (int(self.netmask) << prefixlen_diff),
+            new_prefixlen))
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is a multicast address.
+            See RFC 2373 2.7 for details.
+
+        """
+        return (self.network_address.is_multicast and
+                self.broadcast_address.is_multicast)
+
+    @staticmethod
+    def _is_subnet_of(a, b):
+        try:
+            # Always false if one is v4 and the other is v6.
+            if a._version != b._version:
+                raise TypeError("%s and %s are not of the same version" (a, b))
+            return (b.network_address <= a.network_address and
+                    b.broadcast_address >= a.broadcast_address)
+        except AttributeError:
+            raise TypeError("Unable to test subnet containment "
+                            "between %s and %s" % (a, b))
+
+    def subnet_of(self, other):
+        """Return True if this network is a subnet of other."""
+        return self._is_subnet_of(self, other)
+
+    def supernet_of(self, other):
+        """Return True if this network is a supernet of other."""
+        return self._is_subnet_of(other, self)
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+        Returns:
+            A boolean, True if the address is within one of the
+            reserved IPv6 Network ranges.
+
+        """
+        return (self.network_address.is_reserved and
+                self.broadcast_address.is_reserved)
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 4291.
+
+        """
+        return (self.network_address.is_link_local and
+                self.broadcast_address.is_link_local)
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv4-special-registry or iana-ipv6-special-registry.
+
+        """
+        return (self.network_address.is_private and
+                self.broadcast_address.is_private)
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, True if the address is not reserved per
+            iana-ipv4-special-registry or iana-ipv6-special-registry.
+
+        """
+        return not self.is_private
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 2373 2.5.2.
+
+        """
+        return (self.network_address.is_unspecified and
+                self.broadcast_address.is_unspecified)
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback address as defined in
+            RFC 2373 2.5.3.
+
+        """
+        return (self.network_address.is_loopback and
+                self.broadcast_address.is_loopback)
+
+
+class _BaseV4(object):
+
+    """Base IPv4 object.
+
+    The following methods are used by IPv4 objects in both single IP
+    addresses and networks.
+
+    """
+
+    __slots__ = ()
+    _version = 4
+    # Equivalent to 255.255.255.255 or 32 bits of 1's.
+    _ALL_ONES = (2 ** IPV4LENGTH) - 1
+    _DECIMAL_DIGITS = frozenset('0123456789')
+
+    # the valid octets for host and netmasks. only useful for IPv4.
+    _valid_mask_octets = frozenset([255, 254, 252, 248, 240, 224, 192, 128, 0])
+
+    _max_prefixlen = IPV4LENGTH
+    # There are only a handful of valid v4 netmasks, so we cache them all
+    # when constructed (see _make_netmask()).
+    _netmask_cache = {}
+
+    def _explode_shorthand_ip_string(self):
+        return _compat_str(self)
+
+    @classmethod
+    def _make_netmask(cls, arg):
+        """Make a (netmask, prefix_len) tuple from the given argument.
+
+        Argument can be:
+        - an integer (the prefix length)
+        - a string representing the prefix length (e.g. "24")
+        - a string representing the prefix netmask (e.g. "255.255.255.0")
+        """
+        if arg not in cls._netmask_cache:
+            if isinstance(arg, _compat_int_types):
+                prefixlen = arg
+            else:
+                try:
+                    # Check for a netmask in prefix length form
+                    prefixlen = cls._prefix_from_prefix_string(arg)
+                except NetmaskValueError:
+                    # Check for a netmask or hostmask in dotted-quad form.
+                    # This may raise NetmaskValueError.
+                    prefixlen = cls._prefix_from_ip_string(arg)
+            netmask = IPv4Address(cls._ip_int_from_prefix(prefixlen))
+            cls._netmask_cache[arg] = netmask, prefixlen
+        return cls._netmask_cache[arg]
+
+    @classmethod
+    def _ip_int_from_string(cls, ip_str):
+        """Turn the given IP string into an integer for comparison.
+
+        Args:
+            ip_str: A string, the IP ip_str.
+
+        Returns:
+            The IP ip_str as an integer.
+
+        Raises:
+            AddressValueError: if ip_str isn't a valid IPv4 Address.
+
+        """
+        if not ip_str:
+            raise AddressValueError('Address cannot be empty')
+
+        octets = ip_str.split('.')
+        if len(octets) != 4:
+            raise AddressValueError("Expected 4 octets in %r" % ip_str)
+
+        try:
+            return _compat_int_from_byte_vals(
+                map(cls._parse_octet, octets), 'big')
+        except ValueError as exc:
+            raise AddressValueError("%s in %r" % (exc, ip_str))
+
+    @classmethod
+    def _parse_octet(cls, octet_str):
+        """Convert a decimal octet into an integer.
+
+        Args:
+            octet_str: A string, the number to parse.
+
+        Returns:
+            The octet as an integer.
+
+        Raises:
+            ValueError: if the octet isn't strictly a decimal from [0..255].
+
+        """
+        if not octet_str:
+            raise ValueError("Empty octet not permitted")
+        # Whitelist the characters, since int() allows a lot of bizarre stuff.
+        if not cls._DECIMAL_DIGITS.issuperset(octet_str):
+            msg = "Only decimal digits permitted in %r"
+            raise ValueError(msg % octet_str)
+        # We do the length check second, since the invalid character error
+        # is likely to be more informative for the user
+        if len(octet_str) > 3:
+            msg = "At most 3 characters permitted in %r"
+            raise ValueError(msg % octet_str)
+        # Convert to integer (we know digits are legal)
+        octet_int = int(octet_str, 10)
+        # Any octets that look like they *might* be written in octal,
+        # and which don't look exactly the same in both octal and
+        # decimal are rejected as ambiguous
+        if octet_int > 7 and octet_str[0] == '0':
+            msg = "Ambiguous (octal/decimal) value in %r not permitted"
+            raise ValueError(msg % octet_str)
+        if octet_int > 255:
+            raise ValueError("Octet %d (> 255) not permitted" % octet_int)
+        return octet_int
+
+    @classmethod
+    def _string_from_ip_int(cls, ip_int):
+        """Turns a 32-bit integer into dotted decimal notation.
+
+        Args:
+            ip_int: An integer, the IP address.
+
+        Returns:
+            The IP address as a string in dotted decimal notation.
+
+        """
+        return '.'.join(_compat_str(struct.unpack(b'!B', b)[0]
+                                    if isinstance(b, bytes)
+                                    else b)
+                        for b in _compat_to_bytes(ip_int, 4, 'big'))
+
+    def _is_hostmask(self, ip_str):
+        """Test if the IP string is a hostmask (rather than a netmask).
+
+        Args:
+            ip_str: A string, the potential hostmask.
+
+        Returns:
+            A boolean, True if the IP string is a hostmask.
+
+        """
+        bits = ip_str.split('.')
+        try:
+            parts = [x for x in map(int, bits) if x in self._valid_mask_octets]
+        except ValueError:
+            return False
+        if len(parts) != len(bits):
+            return False
+        if parts[0] < parts[-1]:
+            return True
+        return False
+
+    def _reverse_pointer(self):
+        """Return the reverse DNS pointer name for the IPv4 address.
+
+        This implements the method described in RFC1035 3.5.
+
+        """
+        reverse_octets = _compat_str(self).split('.')[::-1]
+        return '.'.join(reverse_octets) + '.in-addr.arpa'
+
+    @property
+    def max_prefixlen(self):
+        return self._max_prefixlen
+
+    @property
+    def version(self):
+        return self._version
+
+
+class IPv4Address(_BaseV4, _BaseAddress):
+
+    """Represent and manipulate single IPv4 Addresses."""
+
+    __slots__ = ('_ip', '__weakref__')
+
+    def __init__(self, address):
+
+        """
+        Args:
+            address: A string or integer representing the IP
+
+              Additionally, an integer can be passed, so
+              IPv4Address('192.0.2.1') == IPv4Address(3221225985).
+              or, more generally
+              IPv4Address(int(IPv4Address('192.0.2.1'))) ==
+                IPv4Address('192.0.2.1')
+
+        Raises:
+            AddressValueError: If ipaddress isn't a valid IPv4 address.
+
+        """
+        # Efficient constructor from integer.
+        if isinstance(address, _compat_int_types):
+            self._check_int_address(address)
+            self._ip = address
+            return
+
+        # Constructing from a packed address
+        if isinstance(address, bytes):
+            self._check_packed_address(address, 4)
+            bvs = _compat_bytes_to_byte_vals(address)
+            self._ip = _compat_int_from_byte_vals(bvs, 'big')
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP string.
+        addr_str = _compat_str(address)
+        if '/' in addr_str:
+            raise AddressValueError("Unexpected '/' in %r" % address)
+        self._ip = self._ip_int_from_string(addr_str)
+
+    @property
+    def packed(self):
+        """The binary representation of this address."""
+        return v4_int_to_packed(self._ip)
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+         Returns:
+             A boolean, True if the address is within the
+             reserved IPv4 Network range.
+
+        """
+        return self in self._constants._reserved_network
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv4-special-registry.
+
+        """
+        return any(self in net for net in self._constants._private_networks)
+
+    @property
+    def is_global(self):
+        return (
+            self not in self._constants._public_network and
+            not self.is_private)
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is multicast.
+            See RFC 3171 for details.
+
+        """
+        return self in self._constants._multicast_network
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 5735 3.
+
+        """
+        return self == self._constants._unspecified_address
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback per RFC 3330.
+
+        """
+        return self in self._constants._loopback_network
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is link-local per RFC 3927.
+
+        """
+        return self in self._constants._linklocal_network
+
+
+class IPv4Interface(IPv4Address):
+
+    def __init__(self, address):
+        if isinstance(address, (bytes, _compat_int_types)):
+            IPv4Address.__init__(self, address)
+            self.network = IPv4Network(self._ip)
+            self._prefixlen = self._max_prefixlen
+            return
+
+        if isinstance(address, tuple):
+            IPv4Address.__init__(self, address[0])
+            if len(address) > 1:
+                self._prefixlen = int(address[1])
+            else:
+                self._prefixlen = self._max_prefixlen
+
+            self.network = IPv4Network(address, strict=False)
+            self.netmask = self.network.netmask
+            self.hostmask = self.network.hostmask
+            return
+
+        addr = _split_optional_netmask(address)
+        IPv4Address.__init__(self, addr[0])
+
+        self.network = IPv4Network(address, strict=False)
+        self._prefixlen = self.network._prefixlen
+
+        self.netmask = self.network.netmask
+        self.hostmask = self.network.hostmask
+
+    def __str__(self):
+        return '%s/%d' % (self._string_from_ip_int(self._ip),
+                          self.network.prefixlen)
+
+    def __eq__(self, other):
+        address_equal = IPv4Address.__eq__(self, other)
+        if not address_equal or address_equal is NotImplemented:
+            return address_equal
+        try:
+            return self.network == other.network
+        except AttributeError:
+            # An interface with an associated network is NOT the
+            # same as an unassociated address. That's why the hash
+            # takes the extra info into account.
+            return False
+
+    def __lt__(self, other):
+        address_less = IPv4Address.__lt__(self, other)
+        if address_less is NotImplemented:
+            return NotImplemented
+        try:
+            return (self.network < other.network or
+                    self.network == other.network and address_less)
+        except AttributeError:
+            # We *do* allow addresses and interfaces to be sorted. The
+            # unassociated address is considered less than all interfaces.
+            return False
+
+    def __hash__(self):
+        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+
+    __reduce__ = _IPAddressBase.__reduce__
+
+    @property
+    def ip(self):
+        return IPv4Address(self._ip)
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.hostmask)
+
+
+class IPv4Network(_BaseV4, _BaseNetwork):
+
+    """This class represents and manipulates 32-bit IPv4 network + addresses..
+
+    Attributes: [examples for IPv4Network('192.0.2.0/27')]
+        .network_address: IPv4Address('192.0.2.0')
+        .hostmask: IPv4Address('0.0.0.31')
+        .broadcast_address: IPv4Address('192.0.2.32')
+        .netmask: IPv4Address('255.255.255.224')
+        .prefixlen: 27
+
+    """
+    # Class to use when creating address objects
+    _address_class = IPv4Address
+
+    def __init__(self, address, strict=True):
+
+        """Instantiate a new IPv4 network object.
+
+        Args:
+            address: A string or integer representing the IP [& network].
+              '192.0.2.0/24'
+              '192.0.2.0/255.255.255.0'
+              '192.0.0.2/0.0.0.255'
+              are all functionally the same in IPv4. Similarly,
+              '192.0.2.1'
+              '192.0.2.1/255.255.255.255'
+              '192.0.2.1/32'
+              are also functionally equivalent. That is to say, failing to
+              provide a subnetmask will create an object with a mask of /32.
+
+              If the mask (portion after the / in the argument) is given in
+              dotted quad form, it is treated as a netmask if it starts with a
+              non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it
+              starts with a zero field (e.g. 0.255.255.255 == /8), with the
+              single exception of an all-zero mask which is treated as a
+              netmask == /0. If no mask is given, a default of /32 is used.
+
+              Additionally, an integer can be passed, so
+              IPv4Network('192.0.2.1') == IPv4Network(3221225985)
+              or, more generally
+              IPv4Interface(int(IPv4Interface('192.0.2.1'))) ==
+                IPv4Interface('192.0.2.1')
+
+        Raises:
+            AddressValueError: If ipaddress isn't a valid IPv4 address.
+            NetmaskValueError: If the netmask isn't valid for
+              an IPv4 address.
+            ValueError: If strict is True and a network address is not
+              supplied.
+
+        """
+        _BaseNetwork.__init__(self, address)
+
+        # Constructing from a packed address or integer
+        if isinstance(address, (_compat_int_types, bytes)):
+            self.network_address = IPv4Address(address)
+            self.netmask, self._prefixlen = self._make_netmask(
+                self._max_prefixlen)
+            # fixme: address/network test here.
+            return
+
+        if isinstance(address, tuple):
+            if len(address) > 1:
+                arg = address[1]
+            else:
+                # We weren't given an address[1]
+                arg = self._max_prefixlen
+            self.network_address = IPv4Address(address[0])
+            self.netmask, self._prefixlen = self._make_netmask(arg)
+            packed = int(self.network_address)
+            if packed & int(self.netmask) != packed:
+                if strict:
+                    raise ValueError('%s has host bits set' % self)
+                else:
+                    self.network_address = IPv4Address(packed &
+                                                       int(self.netmask))
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP prefix string.
+        addr = _split_optional_netmask(address)
+        self.network_address = IPv4Address(self._ip_int_from_string(addr[0]))
+
+        if len(addr) == 2:
+            arg = addr[1]
+        else:
+            arg = self._max_prefixlen
+        self.netmask, self._prefixlen = self._make_netmask(arg)
+
+        if strict:
+            if (IPv4Address(int(self.network_address) & int(self.netmask)) !=
+                    self.network_address):
+                raise ValueError('%s has host bits set' % self)
+        self.network_address = IPv4Address(int(self.network_address) &
+                                           int(self.netmask))
+
+        if self._prefixlen == (self._max_prefixlen - 1):
+            self.hosts = self.__iter__
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, True if the address is not reserved per
+            iana-ipv4-special-registry.
+
+        """
+        return (not (self.network_address in IPv4Network('100.64.0.0/10') and
+                self.broadcast_address in IPv4Network('100.64.0.0/10')) and
+                not self.is_private)
+
+
+class _IPv4Constants(object):
+
+    _linklocal_network = IPv4Network('169.254.0.0/16')
+
+    _loopback_network = IPv4Network('127.0.0.0/8')
+
+    _multicast_network = IPv4Network('224.0.0.0/4')
+
+    _public_network = IPv4Network('100.64.0.0/10')
+
+    _private_networks = [
+        IPv4Network('0.0.0.0/8'),
+        IPv4Network('10.0.0.0/8'),
+        IPv4Network('127.0.0.0/8'),
+        IPv4Network('169.254.0.0/16'),
+        IPv4Network('172.16.0.0/12'),
+        IPv4Network('192.0.0.0/29'),
+        IPv4Network('192.0.0.170/31'),
+        IPv4Network('192.0.2.0/24'),
+        IPv4Network('192.168.0.0/16'),
+        IPv4Network('198.18.0.0/15'),
+        IPv4Network('198.51.100.0/24'),
+        IPv4Network('203.0.113.0/24'),
+        IPv4Network('240.0.0.0/4'),
+        IPv4Network('255.255.255.255/32'),
+    ]
+
+    _reserved_network = IPv4Network('240.0.0.0/4')
+
+    _unspecified_address = IPv4Address('0.0.0.0')
+
+
+IPv4Address._constants = _IPv4Constants
+
+
+class _BaseV6(object):
+
+    """Base IPv6 object.
+
+    The following methods are used by IPv6 objects in both single IP
+    addresses and networks.
+
+    """
+
+    __slots__ = ()
+    _version = 6
+    _ALL_ONES = (2 ** IPV6LENGTH) - 1
+    _HEXTET_COUNT = 8
+    _HEX_DIGITS = frozenset('0123456789ABCDEFabcdef')
+    _max_prefixlen = IPV6LENGTH
+
+    # There are only a bunch of valid v6 netmasks, so we cache them all
+    # when constructed (see _make_netmask()).
+    _netmask_cache = {}
+
+    @classmethod
+    def _make_netmask(cls, arg):
+        """Make a (netmask, prefix_len) tuple from the given argument.
+
+        Argument can be:
+        - an integer (the prefix length)
+        - a string representing the prefix length (e.g. "24")
+        - a string representing the prefix netmask (e.g. "255.255.255.0")
+        """
+        if arg not in cls._netmask_cache:
+            if isinstance(arg, _compat_int_types):
+                prefixlen = arg
+            else:
+                prefixlen = cls._prefix_from_prefix_string(arg)
+            netmask = IPv6Address(cls._ip_int_from_prefix(prefixlen))
+            cls._netmask_cache[arg] = netmask, prefixlen
+        return cls._netmask_cache[arg]
+
+    @classmethod
+    def _ip_int_from_string(cls, ip_str):
+        """Turn an IPv6 ip_str into an integer.
+
+        Args:
+            ip_str: A string, the IPv6 ip_str.
+
+        Returns:
+            An int, the IPv6 address
+
+        Raises:
+            AddressValueError: if ip_str isn't a valid IPv6 Address.
+
+        """
+        if not ip_str:
+            raise AddressValueError('Address cannot be empty')
+
+        parts = ip_str.split(':')
+
+        # An IPv6 address needs at least 2 colons (3 parts).
+        _min_parts = 3
+        if len(parts) < _min_parts:
+            msg = "At least %d parts expected in %r" % (_min_parts, ip_str)
+            raise AddressValueError(msg)
+
+        # If the address has an IPv4-style suffix, convert it to hexadecimal.
+        if '.' in parts[-1]:
+            try:
+                ipv4_int = IPv4Address(parts.pop())._ip
+            except AddressValueError as exc:
+                raise AddressValueError("%s in %r" % (exc, ip_str))
+            parts.append('%x' % ((ipv4_int >> 16) & 0xFFFF))
+            parts.append('%x' % (ipv4_int & 0xFFFF))
+
+        # An IPv6 address can't have more than 8 colons (9 parts).
+        # The extra colon comes from using the "::" notation for a single
+        # leading or trailing zero part.
+        _max_parts = cls._HEXTET_COUNT + 1
+        if len(parts) > _max_parts:
+            msg = "At most %d colons permitted in %r" % (
+                _max_parts - 1, ip_str)
+            raise AddressValueError(msg)
+
+        # Disregarding the endpoints, find '::' with nothing in between.
+        # This indicates that a run of zeroes has been skipped.
+        skip_index = None
+        for i in _compat_range(1, len(parts) - 1):
+            if not parts[i]:
+                if skip_index is not None:
+                    # Can't have more than one '::'
+                    msg = "At most one '::' permitted in %r" % ip_str
+                    raise AddressValueError(msg)
+                skip_index = i
+
+        # parts_hi is the number of parts to copy from above/before the '::'
+        # parts_lo is the number of parts to copy from below/after the '::'
+        if skip_index is not None:
+            # If we found a '::', then check if it also covers the endpoints.
+            parts_hi = skip_index
+            parts_lo = len(parts) - skip_index - 1
+            if not parts[0]:
+                parts_hi -= 1
+                if parts_hi:
+                    msg = "Leading ':' only permitted as part of '::' in %r"
+                    raise AddressValueError(msg % ip_str)  # ^: requires ^::
+            if not parts[-1]:
+                parts_lo -= 1
+                if parts_lo:
+                    msg = "Trailing ':' only permitted as part of '::' in %r"
+                    raise AddressValueError(msg % ip_str)  # :$ requires ::$
+            parts_skipped = cls._HEXTET_COUNT - (parts_hi + parts_lo)
+            if parts_skipped < 1:
+                msg = "Expected at most %d other parts with '::' in %r"
+                raise AddressValueError(msg % (cls._HEXTET_COUNT - 1, ip_str))
+        else:
+            # Otherwise, allocate the entire address to parts_hi.  The
+            # endpoints could still be empty, but _parse_hextet() will check
+            # for that.
+            if len(parts) != cls._HEXTET_COUNT:
+                msg = "Exactly %d parts expected without '::' in %r"
+                raise AddressValueError(msg % (cls._HEXTET_COUNT, ip_str))
+            if not parts[0]:
+                msg = "Leading ':' only permitted as part of '::' in %r"
+                raise AddressValueError(msg % ip_str)  # ^: requires ^::
+            if not parts[-1]:
+                msg = "Trailing ':' only permitted as part of '::' in %r"
+                raise AddressValueError(msg % ip_str)  # :$ requires ::$
+            parts_hi = len(parts)
+            parts_lo = 0
+            parts_skipped = 0
+
+        try:
+            # Now, parse the hextets into a 128-bit integer.
+            ip_int = 0
+            for i in range(parts_hi):
+                ip_int <<= 16
+                ip_int |= cls._parse_hextet(parts[i])
+            ip_int <<= 16 * parts_skipped
+            for i in range(-parts_lo, 0):
+                ip_int <<= 16
+                ip_int |= cls._parse_hextet(parts[i])
+            return ip_int
+        except ValueError as exc:
+            raise AddressValueError("%s in %r" % (exc, ip_str))
+
+    @classmethod
+    def _parse_hextet(cls, hextet_str):
+        """Convert an IPv6 hextet string into an integer.
+
+        Args:
+            hextet_str: A string, the number to parse.
+
+        Returns:
+            The hextet as an integer.
+
+        Raises:
+            ValueError: if the input isn't strictly a hex number from
+              [0..FFFF].
+
+        """
+        # Whitelist the characters, since int() allows a lot of bizarre stuff.
+        if not cls._HEX_DIGITS.issuperset(hextet_str):
+            raise ValueError("Only hex digits permitted in %r" % hextet_str)
+        # We do the length check second, since the invalid character error
+        # is likely to be more informative for the user
+        if len(hextet_str) > 4:
+            msg = "At most 4 characters permitted in %r"
+            raise ValueError(msg % hextet_str)
+        # Length check means we can skip checking the integer value
+        return int(hextet_str, 16)
+
+    @classmethod
+    def _compress_hextets(cls, hextets):
+        """Compresses a list of hextets.
+
+        Compresses a list of strings, replacing the longest continuous
+        sequence of "0" in the list with "" and adding empty strings at
+        the beginning or at the end of the string such that subsequently
+        calling ":".join(hextets) will produce the compressed version of
+        the IPv6 address.
+
+        Args:
+            hextets: A list of strings, the hextets to compress.
+
+        Returns:
+            A list of strings.
+
+        """
+        best_doublecolon_start = -1
+        best_doublecolon_len = 0
+        doublecolon_start = -1
+        doublecolon_len = 0
+        for index, hextet in enumerate(hextets):
+            if hextet == '0':
+                doublecolon_len += 1
+                if doublecolon_start == -1:
+                    # Start of a sequence of zeros.
+                    doublecolon_start = index
+                if doublecolon_len > best_doublecolon_len:
+                    # This is the longest sequence of zeros so far.
+                    best_doublecolon_len = doublecolon_len
+                    best_doublecolon_start = doublecolon_start
+            else:
+                doublecolon_len = 0
+                doublecolon_start = -1
+
+        if best_doublecolon_len > 1:
+            best_doublecolon_end = (best_doublecolon_start +
+                                    best_doublecolon_len)
+            # For zeros at the end of the address.
+            if best_doublecolon_end == len(hextets):
+                hextets += ['']
+            hextets[best_doublecolon_start:best_doublecolon_end] = ['']
+            # For zeros at the beginning of the address.
+            if best_doublecolon_start == 0:
+                hextets = [''] + hextets
+
+        return hextets
+
+    @classmethod
+    def _string_from_ip_int(cls, ip_int=None):
+        """Turns a 128-bit integer into hexadecimal notation.
+
+        Args:
+            ip_int: An integer, the IP address.
+
+        Returns:
+            A string, the hexadecimal representation of the address.
+
+        Raises:
+            ValueError: The address is bigger than 128 bits of all ones.
+
+        """
+        if ip_int is None:
+            ip_int = int(cls._ip)
+
+        if ip_int > cls._ALL_ONES:
+            raise ValueError('IPv6 address is too large')
+
+        hex_str = '%032x' % ip_int
+        hextets = ['%x' % int(hex_str[x:x + 4], 16) for x in range(0, 32, 4)]
+
+        hextets = cls._compress_hextets(hextets)
+        return ':'.join(hextets)
+
+    def _explode_shorthand_ip_string(self):
+        """Expand a shortened IPv6 address.
+
+        Args:
+            ip_str: A string, the IPv6 address.
+
+        Returns:
+            A string, the expanded IPv6 address.
+
+        """
+        if isinstance(self, IPv6Network):
+            ip_str = _compat_str(self.network_address)
+        elif isinstance(self, IPv6Interface):
+            ip_str = _compat_str(self.ip)
+        else:
+            ip_str = _compat_str(self)
+
+        ip_int = self._ip_int_from_string(ip_str)
+        hex_str = '%032x' % ip_int
+        parts = [hex_str[x:x + 4] for x in range(0, 32, 4)]
+        if isinstance(self, (_BaseNetwork, IPv6Interface)):
+            return '%s/%d' % (':'.join(parts), self._prefixlen)
+        return ':'.join(parts)
+
+    def _reverse_pointer(self):
+        """Return the reverse DNS pointer name for the IPv6 address.
+
+        This implements the method described in RFC3596 2.5.
+
+        """
+        reverse_chars = self.exploded[::-1].replace(':', '')
+        return '.'.join(reverse_chars) + '.ip6.arpa'
+
+    @property
+    def max_prefixlen(self):
+        return self._max_prefixlen
+
+    @property
+    def version(self):
+        return self._version
+
+
+class IPv6Address(_BaseV6, _BaseAddress):
+
+    """Represent and manipulate single IPv6 Addresses."""
+
+    __slots__ = ('_ip', '__weakref__')
+
+    def __init__(self, address):
+        """Instantiate a new IPv6 address object.
+
+        Args:
+            address: A string or integer representing the IP
+
+              Additionally, an integer can be passed, so
+              IPv6Address('2001:db8::') ==
+                IPv6Address(42540766411282592856903984951653826560)
+              or, more generally
+              IPv6Address(int(IPv6Address('2001:db8::'))) ==
+                IPv6Address('2001:db8::')
+
+        Raises:
+            AddressValueError: If address isn't a valid IPv6 address.
+
+        """
+        # Efficient constructor from integer.
+        if isinstance(address, _compat_int_types):
+            self._check_int_address(address)
+            self._ip = address
+            return
+
+        # Constructing from a packed address
+        if isinstance(address, bytes):
+            self._check_packed_address(address, 16)
+            bvs = _compat_bytes_to_byte_vals(address)
+            self._ip = _compat_int_from_byte_vals(bvs, 'big')
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP string.
+        addr_str = _compat_str(address)
+        if '/' in addr_str:
+            raise AddressValueError("Unexpected '/' in %r" % address)
+        self._ip = self._ip_int_from_string(addr_str)
+
+    @property
+    def packed(self):
+        """The binary representation of this address."""
+        return v6_int_to_packed(self._ip)
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is a multicast address.
+            See RFC 2373 2.7 for details.
+
+        """
+        return self in self._constants._multicast_network
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+        Returns:
+            A boolean, True if the address is within one of the
+            reserved IPv6 Network ranges.
+
+        """
+        return any(self in x for x in self._constants._reserved_networks)
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 4291.
+
+        """
+        return self in self._constants._linklocal_network
+
+    @property
+    def is_site_local(self):
+        """Test if the address is reserved for site-local.
+
+        Note that the site-local address space has been deprecated by RFC 3879.
+        Use is_private to test if this address is in the space of unique local
+        addresses as defined by RFC 4193.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 3513 2.5.6.
+
+        """
+        return self in self._constants._sitelocal_network
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv6-special-registry.
+
+        """
+        return any(self in net for net in self._constants._private_networks)
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, true if the address is not reserved per
+            iana-ipv6-special-registry.
+
+        """
+        return not self.is_private
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 2373 2.5.2.
+
+        """
+        return self._ip == 0
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback address as defined in
+            RFC 2373 2.5.3.
+
+        """
+        return self._ip == 1
+
+    @property
+    def ipv4_mapped(self):
+        """Return the IPv4 mapped address.
+
+        Returns:
+            If the IPv6 address is a v4 mapped address, return the
+            IPv4 mapped address. Return None otherwise.
+
+        """
+        if (self._ip >> 32) != 0xFFFF:
+            return None
+        return IPv4Address(self._ip & 0xFFFFFFFF)
+
+    @property
+    def teredo(self):
+        """Tuple of embedded teredo IPs.
+
+        Returns:
+            Tuple of the (server, client) IPs or None if the address
+            doesn't appear to be a teredo address (doesn't start with
+            2001::/32)
+
+        """
+        if (self._ip >> 96) != 0x20010000:
+            return None
+        return (IPv4Address((self._ip >> 64) & 0xFFFFFFFF),
+                IPv4Address(~self._ip & 0xFFFFFFFF))
+
+    @property
+    def sixtofour(self):
+        """Return the IPv4 6to4 embedded address.
+
+        Returns:
+            The IPv4 6to4-embedded address if present or None if the
+            address doesn't appear to contain a 6to4 embedded address.
+
+        """
+        if (self._ip >> 112) != 0x2002:
+            return None
+        return IPv4Address((self._ip >> 80) & 0xFFFFFFFF)
+
+
+class IPv6Interface(IPv6Address):
+
+    def __init__(self, address):
+        if isinstance(address, (bytes, _compat_int_types)):
+            IPv6Address.__init__(self, address)
+            self.network = IPv6Network(self._ip)
+            self._prefixlen = self._max_prefixlen
+            return
+        if isinstance(address, tuple):
+            IPv6Address.__init__(self, address[0])
+            if len(address) > 1:
+                self._prefixlen = int(address[1])
+            else:
+                self._prefixlen = self._max_prefixlen
+            self.network = IPv6Network(address, strict=False)
+            self.netmask = self.network.netmask
+            self.hostmask = self.network.hostmask
+            return
+
+        addr = _split_optional_netmask(address)
+        IPv6Address.__init__(self, addr[0])
+        self.network = IPv6Network(address, strict=False)
+        self.netmask = self.network.netmask
+        self._prefixlen = self.network._prefixlen
+        self.hostmask = self.network.hostmask
+
+    def __str__(self):
+        return '%s/%d' % (self._string_from_ip_int(self._ip),
+                          self.network.prefixlen)
+
+    def __eq__(self, other):
+        address_equal = IPv6Address.__eq__(self, other)
+        if not address_equal or address_equal is NotImplemented:
+            return address_equal
+        try:
+            return self.network == other.network
+        except AttributeError:
+            # An interface with an associated network is NOT the
+            # same as an unassociated address. That's why the hash
+            # takes the extra info into account.
+            return False
+
+    def __lt__(self, other):
+        address_less = IPv6Address.__lt__(self, other)
+        if address_less is NotImplemented:
+            return NotImplemented
+        try:
+            return (self.network < other.network or
+                    self.network == other.network and address_less)
+        except AttributeError:
+            # We *do* allow addresses and interfaces to be sorted. The
+            # unassociated address is considered less than all interfaces.
+            return False
+
+    def __hash__(self):
+        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+
+    __reduce__ = _IPAddressBase.__reduce__
+
+    @property
+    def ip(self):
+        return IPv6Address(self._ip)
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.hostmask)
+
+    @property
+    def is_unspecified(self):
+        return self._ip == 0 and self.network.is_unspecified
+
+    @property
+    def is_loopback(self):
+        return self._ip == 1 and self.network.is_loopback
+
+
+class IPv6Network(_BaseV6, _BaseNetwork):
+
+    """This class represents and manipulates 128-bit IPv6 networks.
+
+    Attributes: [examples for IPv6('2001:db8::1000/124')]
+        .network_address: IPv6Address('2001:db8::1000')
+        .hostmask: IPv6Address('::f')
+        .broadcast_address: IPv6Address('2001:db8::100f')
+        .netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0')
+        .prefixlen: 124
+
+    """
+
+    # Class to use when creating address objects
+    _address_class = IPv6Address
+
+    def __init__(self, address, strict=True):
+        """Instantiate a new IPv6 Network object.
+
+        Args:
+            address: A string or integer representing the IPv6 network or the
+              IP and prefix/netmask.
+              '2001:db8::/128'
+              '2001:db8:0000:0000:0000:0000:0000:0000/128'
+              '2001:db8::'
+              are all functionally the same in IPv6.  That is to say,
+              failing to provide a subnetmask will create an object with
+              a mask of /128.
+
+              Additionally, an integer can be passed, so
+              IPv6Network('2001:db8::') ==
+                IPv6Network(42540766411282592856903984951653826560)
+              or, more generally
+              IPv6Network(int(IPv6Network('2001:db8::'))) ==
+                IPv6Network('2001:db8::')
+
+            strict: A boolean. If true, ensure that we have been passed
+              A true network address, eg, 2001:db8::1000/124 and not an
+              IP address on a network, eg, 2001:db8::1/124.
+
+        Raises:
+            AddressValueError: If address isn't a valid IPv6 address.
+            NetmaskValueError: If the netmask isn't valid for
+              an IPv6 address.
+            ValueError: If strict was True and a network address was not
+              supplied.
+
+        """
+        _BaseNetwork.__init__(self, address)
+
+        # Efficient constructor from integer or packed address
+        if isinstance(address, (bytes, _compat_int_types)):
+            self.network_address = IPv6Address(address)
+            self.netmask, self._prefixlen = self._make_netmask(
+                self._max_prefixlen)
+            return
+
+        if isinstance(address, tuple):
+            if len(address) > 1:
+                arg = address[1]
+            else:
+                arg = self._max_prefixlen
+            self.netmask, self._prefixlen = self._make_netmask(arg)
+            self.network_address = IPv6Address(address[0])
+            packed = int(self.network_address)
+            if packed & int(self.netmask) != packed:
+                if strict:
+                    raise ValueError('%s has host bits set' % self)
+                else:
+                    self.network_address = IPv6Address(packed &
+                                                       int(self.netmask))
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP prefix string.
+        addr = _split_optional_netmask(address)
+
+        self.network_address = IPv6Address(self._ip_int_from_string(addr[0]))
+
+        if len(addr) == 2:
+            arg = addr[1]
+        else:
+            arg = self._max_prefixlen
+        self.netmask, self._prefixlen = self._make_netmask(arg)
+
+        if strict:
+            if (IPv6Address(int(self.network_address) & int(self.netmask)) !=
+                    self.network_address):
+                raise ValueError('%s has host bits set' % self)
+        self.network_address = IPv6Address(int(self.network_address) &
+                                           int(self.netmask))
+
+        if self._prefixlen == (self._max_prefixlen - 1):
+            self.hosts = self.__iter__
+
+    def hosts(self):
+        """Generate Iterator over usable hosts in a network.
+
+          This is like __iter__ except it doesn't return the
+          Subnet-Router anycast address.
+
+        """
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network + 1, broadcast + 1):
+            yield self._address_class(x)
+
+    @property
+    def is_site_local(self):
+        """Test if the address is reserved for site-local.
+
+        Note that the site-local address space has been deprecated by RFC 3879.
+        Use is_private to test if this address is in the space of unique local
+        addresses as defined by RFC 4193.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 3513 2.5.6.
+
+        """
+        return (self.network_address.is_site_local and
+                self.broadcast_address.is_site_local)
+
+
+class _IPv6Constants(object):
+
+    _linklocal_network = IPv6Network('fe80::/10')
+
+    _multicast_network = IPv6Network('ff00::/8')
+
+    _private_networks = [
+        IPv6Network('::1/128'),
+        IPv6Network('::/128'),
+        IPv6Network('::ffff:0:0/96'),
+        IPv6Network('100::/64'),
+        IPv6Network('2001::/23'),
+        IPv6Network('2001:2::/48'),
+        IPv6Network('2001:db8::/32'),
+        IPv6Network('2001:10::/28'),
+        IPv6Network('fc00::/7'),
+        IPv6Network('fe80::/10'),
+    ]
+
+    _reserved_networks = [
+        IPv6Network('::/8'), IPv6Network('100::/8'),
+        IPv6Network('200::/7'), IPv6Network('400::/6'),
+        IPv6Network('800::/5'), IPv6Network('1000::/4'),
+        IPv6Network('4000::/3'), IPv6Network('6000::/3'),
+        IPv6Network('8000::/3'), IPv6Network('A000::/3'),
+        IPv6Network('C000::/3'), IPv6Network('E000::/4'),
+        IPv6Network('F000::/5'), IPv6Network('F800::/6'),
+        IPv6Network('FE00::/9'),
+    ]
+
+    _sitelocal_network = IPv6Network('fec0::/10')
+
+
+IPv6Address._constants = _IPv6Constants
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__init__.py
new file mode 100644
index 00000000..a6f44a55
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__init__.py
@@ -0,0 +1,347 @@
+# -*- coding: utf-8 -*-
+
+"""
+lockfile.py - Platform-independent advisory file locks.
+
+Requires Python 2.5 unless you apply 2.4.diff
+Locking is done on a per-thread basis instead of a per-process basis.
+
+Usage:
+
+>>> lock = LockFile('somefile')
+>>> try:
+...     lock.acquire()
+... except AlreadyLocked:
+...     print 'somefile', 'is locked already.'
+... except LockFailed:
+...     print 'somefile', 'can\\'t be locked.'
+... else:
+...     print 'got lock'
+got lock
+>>> print lock.is_locked()
+True
+>>> lock.release()
+
+>>> lock = LockFile('somefile')
+>>> print lock.is_locked()
+False
+>>> with lock:
+...    print lock.is_locked()
+True
+>>> print lock.is_locked()
+False
+
+>>> lock = LockFile('somefile')
+>>> # It is okay to lock twice from the same thread...
+>>> with lock:
+...     lock.acquire()
+...
+>>> # Though no counter is kept, so you can't unlock multiple times...
+>>> print lock.is_locked()
+False
+
+Exceptions:
+
+    Error - base class for other exceptions
+        LockError - base class for all locking exceptions
+            AlreadyLocked - Another thread or process already holds the lock
+            LockFailed - Lock failed for some other reason
+        UnlockError - base class for all unlocking exceptions
+            AlreadyUnlocked - File was not locked.
+            NotMyLock - File was locked but not by the current thread/process
+"""
+
+from __future__ import absolute_import
+
+import functools
+import os
+import socket
+import threading
+import warnings
+
+# Work with PEP8 and non-PEP8 versions of threading module.
+if not hasattr(threading, "current_thread"):
+    threading.current_thread = threading.currentThread
+if not hasattr(threading.Thread, "get_name"):
+    threading.Thread.get_name = threading.Thread.getName
+
+__all__ = ['Error', 'LockError', 'LockTimeout', 'AlreadyLocked',
+           'LockFailed', 'UnlockError', 'NotLocked', 'NotMyLock',
+           'LinkFileLock', 'MkdirFileLock', 'SQLiteFileLock',
+           'LockBase', 'locked']
+
+
+class Error(Exception):
+    """
+    Base class for other exceptions.
+
+    >>> try:
+    ...   raise Error
+    ... except Exception:
+    ...   pass
+    """
+    pass
+
+
+class LockError(Error):
+    """
+    Base class for error arising from attempts to acquire the lock.
+
+    >>> try:
+    ...   raise LockError
+    ... except Error:
+    ...   pass
+    """
+    pass
+
+
+class LockTimeout(LockError):
+    """Raised when lock creation fails within a user-defined period of time.
+
+    >>> try:
+    ...   raise LockTimeout
+    ... except LockError:
+    ...   pass
+    """
+    pass
+
+
+class AlreadyLocked(LockError):
+    """Some other thread/process is locking the file.
+
+    >>> try:
+    ...   raise AlreadyLocked
+    ... except LockError:
+    ...   pass
+    """
+    pass
+
+
+class LockFailed(LockError):
+    """Lock file creation failed for some other reason.
+
+    >>> try:
+    ...   raise LockFailed
+    ... except LockError:
+    ...   pass
+    """
+    pass
+
+
+class UnlockError(Error):
+    """
+    Base class for errors arising from attempts to release the lock.
+
+    >>> try:
+    ...   raise UnlockError
+    ... except Error:
+    ...   pass
+    """
+    pass
+
+
+class NotLocked(UnlockError):
+    """Raised when an attempt is made to unlock an unlocked file.
+
+    >>> try:
+    ...   raise NotLocked
+    ... except UnlockError:
+    ...   pass
+    """
+    pass
+
+
+class NotMyLock(UnlockError):
+    """Raised when an attempt is made to unlock a file someone else locked.
+
+    >>> try:
+    ...   raise NotMyLock
+    ... except UnlockError:
+    ...   pass
+    """
+    pass
+
+
+class _SharedBase(object):
+    def __init__(self, path):
+        self.path = path
+
+    def acquire(self, timeout=None):
+        """
+        Acquire the lock.
+
+        * If timeout is omitted (or None), wait forever trying to lock the
+          file.
+
+        * If timeout > 0, try to acquire the lock for that many seconds.  If
+          the lock period expires and the file is still locked, raise
+          LockTimeout.
+
+        * If timeout <= 0, raise AlreadyLocked immediately if the file is
+          already locked.
+        """
+        raise NotImplemented("implement in subclass")
+
+    def release(self):
+        """
+        Release the lock.
+
+        If the file is not locked, raise NotLocked.
+        """
+        raise NotImplemented("implement in subclass")
+
+    def __enter__(self):
+        """
+        Context manager support.
+        """
+        self.acquire()
+        return self
+
+    def __exit__(self, *_exc):
+        """
+        Context manager support.
+        """
+        self.release()
+
+    def __repr__(self):
+        return "<%s: %r>" % (self.__class__.__name__, self.path)
+
+
+class LockBase(_SharedBase):
+    """Base class for platform-specific lock classes."""
+    def __init__(self, path, threaded=True, timeout=None):
+        """
+        >>> lock = LockBase('somefile')
+        >>> lock = LockBase('somefile', threaded=False)
+        """
+        super(LockBase, self).__init__(path)
+        self.lock_file = os.path.abspath(path) + ".lock"
+        self.hostname = socket.gethostname()
+        self.pid = os.getpid()
+        if threaded:
+            t = threading.current_thread()
+            # Thread objects in Python 2.4 and earlier do not have ident
+            # attrs.  Worm around that.
+            ident = getattr(t, "ident", hash(t))
+            self.tname = "-%x" % (ident & 0xffffffff)
+        else:
+            self.tname = ""
+        dirname = os.path.dirname(self.lock_file)
+
+        # unique name is mostly about the current process, but must
+        # also contain the path -- otherwise, two adjacent locked
+        # files conflict (one file gets locked, creating lock-file and
+        # unique file, the other one gets locked, creating lock-file
+        # and overwriting the already existing lock-file, then one
+        # gets unlocked, deleting both lock-file and unique file,
+        # finally the last lock errors out upon releasing.
+        self.unique_name = os.path.join(dirname,
+                                        "%s%s.%s%s" % (self.hostname,
+                                                       self.tname,
+                                                       self.pid,
+                                                       hash(self.path)))
+        self.timeout = timeout
+
+    def is_locked(self):
+        """
+        Tell whether or not the file is locked.
+        """
+        raise NotImplemented("implement in subclass")
+
+    def i_am_locking(self):
+        """
+        Return True if this object is locking the file.
+        """
+        raise NotImplemented("implement in subclass")
+
+    def break_lock(self):
+        """
+        Remove a lock.  Useful if a locking thread failed to unlock.
+        """
+        raise NotImplemented("implement in subclass")
+
+    def __repr__(self):
+        return "<%s: %r -- %r>" % (self.__class__.__name__, self.unique_name,
+                                   self.path)
+
+
+def _fl_helper(cls, mod, *args, **kwds):
+    warnings.warn("Import from %s module instead of lockfile package" % mod,
+                  DeprecationWarning, stacklevel=2)
+    # This is a bit funky, but it's only for awhile.  The way the unit tests
+    # are constructed this function winds up as an unbound method, so it
+    # actually takes three args, not two.  We want to toss out self.
+    if not isinstance(args[0], str):
+        # We are testing, avoid the first arg
+        args = args[1:]
+    if len(args) == 1 and not kwds:
+        kwds["threaded"] = True
+    return cls(*args, **kwds)
+
+
+def LinkFileLock(*args, **kwds):
+    """Factory function provided for backwards compatibility.
+
+    Do not use in new code.  Instead, import LinkLockFile from the
+    lockfile.linklockfile module.
+    """
+    from . import linklockfile
+    return _fl_helper(linklockfile.LinkLockFile, "lockfile.linklockfile",
+                      *args, **kwds)
+
+
+def MkdirFileLock(*args, **kwds):
+    """Factory function provided for backwards compatibility.
+
+    Do not use in new code.  Instead, import MkdirLockFile from the
+    lockfile.mkdirlockfile module.
+    """
+    from . import mkdirlockfile
+    return _fl_helper(mkdirlockfile.MkdirLockFile, "lockfile.mkdirlockfile",
+                      *args, **kwds)
+
+
+def SQLiteFileLock(*args, **kwds):
+    """Factory function provided for backwards compatibility.
+
+    Do not use in new code.  Instead, import SQLiteLockFile from the
+    lockfile.mkdirlockfile module.
+    """
+    from . import sqlitelockfile
+    return _fl_helper(sqlitelockfile.SQLiteLockFile, "lockfile.sqlitelockfile",
+                      *args, **kwds)
+
+
+def locked(path, timeout=None):
+    """Decorator which enables locks for decorated function.
+
+    Arguments:
+     - path: path for lockfile.
+     - timeout (optional): Timeout for acquiring lock.
+
+     Usage:
+         @locked('/var/run/myname', timeout=0)
+         def myname(...):
+             ...
+    """
+    def decor(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kwargs):
+            lock = FileLock(path, timeout=timeout)
+            lock.acquire()
+            try:
+                return func(*args, **kwargs)
+            finally:
+                lock.release()
+        return wrapper
+    return decor
+
+
+if hasattr(os, "link"):
+    from . import linklockfile as _llf
+    LockFile = _llf.LinkLockFile
+else:
+    from . import mkdirlockfile as _mlf
+    LockFile = _mlf.MkdirLockFile
+
+FileLock = LockFile
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..22a11a87
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/linklockfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/linklockfile.cpython-37.pyc
new file mode 100644
index 00000000..eb655c83
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/linklockfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/mkdirlockfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/mkdirlockfile.cpython-37.pyc
new file mode 100644
index 00000000..b3efe287
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/mkdirlockfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/pidlockfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/pidlockfile.cpython-37.pyc
new file mode 100644
index 00000000..4447ee32
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/pidlockfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/sqlitelockfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/sqlitelockfile.cpython-37.pyc
new file mode 100644
index 00000000..c5f3955a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/sqlitelockfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/symlinklockfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/symlinklockfile.cpython-37.pyc
new file mode 100644
index 00000000..e32643a3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/__pycache__/symlinklockfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/linklockfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/linklockfile.py
new file mode 100644
index 00000000..2ca9be04
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/linklockfile.py
@@ -0,0 +1,73 @@
+from __future__ import absolute_import
+
+import time
+import os
+
+from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout,
+               AlreadyLocked)
+
+
+class LinkLockFile(LockBase):
+    """Lock access to a file using atomic property of link(2).
+
+    >>> lock = LinkLockFile('somefile')
+    >>> lock = LinkLockFile('somefile', threaded=False)
+    """
+
+    def acquire(self, timeout=None):
+        try:
+            open(self.unique_name, "wb").close()
+        except IOError:
+            raise LockFailed("failed to create %s" % self.unique_name)
+
+        timeout = timeout if timeout is not None else self.timeout
+        end_time = time.time()
+        if timeout is not None and timeout > 0:
+            end_time += timeout
+
+        while True:
+            # Try and create a hard link to it.
+            try:
+                os.link(self.unique_name, self.lock_file)
+            except OSError:
+                # Link creation failed.  Maybe we've double-locked?
+                nlinks = os.stat(self.unique_name).st_nlink
+                if nlinks == 2:
+                    # The original link plus the one I created == 2.  We're
+                    # good to go.
+                    return
+                else:
+                    # Otherwise the lock creation failed.
+                    if timeout is not None and time.time() > end_time:
+                        os.unlink(self.unique_name)
+                        if timeout > 0:
+                            raise LockTimeout("Timeout waiting to acquire"
+                                              " lock for %s" %
+                                              self.path)
+                        else:
+                            raise AlreadyLocked("%s is already locked" %
+                                                self.path)
+                    time.sleep(timeout is not None and timeout / 10 or 0.1)
+            else:
+                # Link creation succeeded.  We're good to go.
+                return
+
+    def release(self):
+        if not self.is_locked():
+            raise NotLocked("%s is not locked" % self.path)
+        elif not os.path.exists(self.unique_name):
+            raise NotMyLock("%s is locked, but not by me" % self.path)
+        os.unlink(self.unique_name)
+        os.unlink(self.lock_file)
+
+    def is_locked(self):
+        return os.path.exists(self.lock_file)
+
+    def i_am_locking(self):
+        return (self.is_locked() and
+                os.path.exists(self.unique_name) and
+                os.stat(self.unique_name).st_nlink == 2)
+
+    def break_lock(self):
+        if os.path.exists(self.lock_file):
+            os.unlink(self.lock_file)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/mkdirlockfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/mkdirlockfile.py
new file mode 100644
index 00000000..05a8c96c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/mkdirlockfile.py
@@ -0,0 +1,84 @@
+from __future__ import absolute_import, division
+
+import time
+import os
+import sys
+import errno
+
+from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout,
+               AlreadyLocked)
+
+
+class MkdirLockFile(LockBase):
+    """Lock file by creating a directory."""
+    def __init__(self, path, threaded=True, timeout=None):
+        """
+        >>> lock = MkdirLockFile('somefile')
+        >>> lock = MkdirLockFile('somefile', threaded=False)
+        """
+        LockBase.__init__(self, path, threaded, timeout)
+        # Lock file itself is a directory.  Place the unique file name into
+        # it.
+        self.unique_name = os.path.join(self.lock_file,
+                                        "%s.%s%s" % (self.hostname,
+                                                     self.tname,
+                                                     self.pid))
+
+    def acquire(self, timeout=None):
+        timeout = timeout if timeout is not None else self.timeout
+        end_time = time.time()
+        if timeout is not None and timeout > 0:
+            end_time += timeout
+
+        if timeout is None:
+            wait = 0.1
+        else:
+            wait = max(0, timeout / 10)
+
+        while True:
+            try:
+                os.mkdir(self.lock_file)
+            except OSError:
+                err = sys.exc_info()[1]
+                if err.errno == errno.EEXIST:
+                    # Already locked.
+                    if os.path.exists(self.unique_name):
+                        # Already locked by me.
+                        return
+                    if timeout is not None and time.time() > end_time:
+                        if timeout > 0:
+                            raise LockTimeout("Timeout waiting to acquire"
+                                              " lock for %s" %
+                                              self.path)
+                        else:
+                            # Someone else has the lock.
+                            raise AlreadyLocked("%s is already locked" %
+                                                self.path)
+                    time.sleep(wait)
+                else:
+                    # Couldn't create the lock for some other reason
+                    raise LockFailed("failed to create %s" % self.lock_file)
+            else:
+                open(self.unique_name, "wb").close()
+                return
+
+    def release(self):
+        if not self.is_locked():
+            raise NotLocked("%s is not locked" % self.path)
+        elif not os.path.exists(self.unique_name):
+            raise NotMyLock("%s is locked, but not by me" % self.path)
+        os.unlink(self.unique_name)
+        os.rmdir(self.lock_file)
+
+    def is_locked(self):
+        return os.path.exists(self.lock_file)
+
+    def i_am_locking(self):
+        return (self.is_locked() and
+                os.path.exists(self.unique_name))
+
+    def break_lock(self):
+        if os.path.exists(self.lock_file):
+            for name in os.listdir(self.lock_file):
+                os.unlink(os.path.join(self.lock_file, name))
+            os.rmdir(self.lock_file)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/pidlockfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/pidlockfile.py
new file mode 100644
index 00000000..069e85b1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/pidlockfile.py
@@ -0,0 +1,190 @@
+# -*- coding: utf-8 -*-
+
+# pidlockfile.py
+#
+# Copyright © 2008–2009 Ben Finney <ben+python@benfinney.id.au>
+#
+# This is free software: you may copy, modify, and/or distribute this work
+# under the terms of the Python Software Foundation License, version 2 or
+# later as published by the Python Software Foundation.
+# No warranty expressed or implied. See the file LICENSE.PSF-2 for details.
+
+""" Lockfile behaviour implemented via Unix PID files.
+    """
+
+from __future__ import absolute_import
+
+import errno
+import os
+import time
+
+from . import (LockBase, AlreadyLocked, LockFailed, NotLocked, NotMyLock,
+               LockTimeout)
+
+
+class PIDLockFile(LockBase):
+    """ Lockfile implemented as a Unix PID file.
+
+    The lock file is a normal file named by the attribute `path`.
+    A lock's PID file contains a single line of text, containing
+    the process ID (PID) of the process that acquired the lock.
+
+    >>> lock = PIDLockFile('somefile')
+    >>> lock = PIDLockFile('somefile')
+    """
+
+    def __init__(self, path, threaded=False, timeout=None):
+        # pid lockfiles don't support threaded operation, so always force
+        # False as the threaded arg.
+        LockBase.__init__(self, path, False, timeout)
+        self.unique_name = self.path
+
+    def read_pid(self):
+        """ Get the PID from the lock file.
+            """
+        return read_pid_from_pidfile(self.path)
+
+    def is_locked(self):
+        """ Test if the lock is currently held.
+
+            The lock is held if the PID file for this lock exists.
+
+            """
+        return os.path.exists(self.path)
+
+    def i_am_locking(self):
+        """ Test if the lock is held by the current process.
+
+        Returns ``True`` if the current process ID matches the
+        number stored in the PID file.
+        """
+        return self.is_locked() and os.getpid() == self.read_pid()
+
+    def acquire(self, timeout=None):
+        """ Acquire the lock.
+
+        Creates the PID file for this lock, or raises an error if
+        the lock could not be acquired.
+        """
+
+        timeout = timeout if timeout is not None else self.timeout
+        end_time = time.time()
+        if timeout is not None and timeout > 0:
+            end_time += timeout
+
+        while True:
+            try:
+                write_pid_to_pidfile(self.path)
+            except OSError as exc:
+                if exc.errno == errno.EEXIST:
+                    # The lock creation failed.  Maybe sleep a bit.
+                    if time.time() > end_time:
+                        if timeout is not None and timeout > 0:
+                            raise LockTimeout("Timeout waiting to acquire"
+                                              " lock for %s" %
+                                              self.path)
+                        else:
+                            raise AlreadyLocked("%s is already locked" %
+                                                self.path)
+                    time.sleep(timeout is not None and timeout / 10 or 0.1)
+                else:
+                    raise LockFailed("failed to create %s" % self.path)
+            else:
+                return
+
+    def release(self):
+        """ Release the lock.
+
+            Removes the PID file to release the lock, or raises an
+            error if the current process does not hold the lock.
+
+            """
+        if not self.is_locked():
+            raise NotLocked("%s is not locked" % self.path)
+        if not self.i_am_locking():
+            raise NotMyLock("%s is locked, but not by me" % self.path)
+        remove_existing_pidfile(self.path)
+
+    def break_lock(self):
+        """ Break an existing lock.
+
+            Removes the PID file if it already exists, otherwise does
+            nothing.
+
+            """
+        remove_existing_pidfile(self.path)
+
+
+def read_pid_from_pidfile(pidfile_path):
+    """ Read the PID recorded in the named PID file.
+
+        Read and return the numeric PID recorded as text in the named
+        PID file. If the PID file cannot be read, or if the content is
+        not a valid PID, return ``None``.
+
+        """
+    pid = None
+    try:
+        pidfile = open(pidfile_path, 'r')
+    except IOError:
+        pass
+    else:
+        # According to the FHS 2.3 section on PID files in /var/run:
+        #
+        #   The file must consist of the process identifier in
+        #   ASCII-encoded decimal, followed by a newline character.
+        #
+        #   Programs that read PID files should be somewhat flexible
+        #   in what they accept; i.e., they should ignore extra
+        #   whitespace, leading zeroes, absence of the trailing
+        #   newline, or additional lines in the PID file.
+
+        line = pidfile.readline().strip()
+        try:
+            pid = int(line)
+        except ValueError:
+            pass
+        pidfile.close()
+
+    return pid
+
+
+def write_pid_to_pidfile(pidfile_path):
+    """ Write the PID in the named PID file.
+
+        Get the numeric process ID (“PID”) of the current process
+        and write it to the named file as a line of text.
+
+        """
+    open_flags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY)
+    open_mode = 0o644
+    pidfile_fd = os.open(pidfile_path, open_flags, open_mode)
+    pidfile = os.fdopen(pidfile_fd, 'w')
+
+    # According to the FHS 2.3 section on PID files in /var/run:
+    #
+    #   The file must consist of the process identifier in
+    #   ASCII-encoded decimal, followed by a newline character. For
+    #   example, if crond was process number 25, /var/run/crond.pid
+    #   would contain three characters: two, five, and newline.
+
+    pid = os.getpid()
+    pidfile.write("%s\n" % pid)
+    pidfile.close()
+
+
+def remove_existing_pidfile(pidfile_path):
+    """ Remove the named PID file if it exists.
+
+        Removing a PID file that doesn't already exist puts us in the
+        desired state, so we ignore the condition if the file does not
+        exist.
+
+        """
+    try:
+        os.remove(pidfile_path)
+    except OSError as exc:
+        if exc.errno == errno.ENOENT:
+            pass
+        else:
+            raise
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/sqlitelockfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/sqlitelockfile.py
new file mode 100644
index 00000000..f997e244
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/sqlitelockfile.py
@@ -0,0 +1,156 @@
+from __future__ import absolute_import, division
+
+import time
+import os
+
+try:
+    unicode
+except NameError:
+    unicode = str
+
+from . import LockBase, NotLocked, NotMyLock, LockTimeout, AlreadyLocked
+
+
+class SQLiteLockFile(LockBase):
+    "Demonstrate SQL-based locking."
+
+    testdb = None
+
+    def __init__(self, path, threaded=True, timeout=None):
+        """
+        >>> lock = SQLiteLockFile('somefile')
+        >>> lock = SQLiteLockFile('somefile', threaded=False)
+        """
+        LockBase.__init__(self, path, threaded, timeout)
+        self.lock_file = unicode(self.lock_file)
+        self.unique_name = unicode(self.unique_name)
+
+        if SQLiteLockFile.testdb is None:
+            import tempfile
+            _fd, testdb = tempfile.mkstemp()
+            os.close(_fd)
+            os.unlink(testdb)
+            del _fd, tempfile
+            SQLiteLockFile.testdb = testdb
+
+        import sqlite3
+        self.connection = sqlite3.connect(SQLiteLockFile.testdb)
+
+        c = self.connection.cursor()
+        try:
+            c.execute("create table locks"
+                      "("
+                      "   lock_file varchar(32),"
+                      "   unique_name varchar(32)"
+                      ")")
+        except sqlite3.OperationalError:
+            pass
+        else:
+            self.connection.commit()
+            import atexit
+            atexit.register(os.unlink, SQLiteLockFile.testdb)
+
+    def acquire(self, timeout=None):
+        timeout = timeout if timeout is not None else self.timeout
+        end_time = time.time()
+        if timeout is not None and timeout > 0:
+            end_time += timeout
+
+        if timeout is None:
+            wait = 0.1
+        elif timeout <= 0:
+            wait = 0
+        else:
+            wait = timeout / 10
+
+        cursor = self.connection.cursor()
+
+        while True:
+            if not self.is_locked():
+                # Not locked.  Try to lock it.
+                cursor.execute("insert into locks"
+                               "  (lock_file, unique_name)"
+                               "  values"
+                               "  (?, ?)",
+                               (self.lock_file, self.unique_name))
+                self.connection.commit()
+
+                # Check to see if we are the only lock holder.
+                cursor.execute("select * from locks"
+                               "  where unique_name = ?",
+                               (self.unique_name,))
+                rows = cursor.fetchall()
+                if len(rows) > 1:
+                    # Nope.  Someone else got there.  Remove our lock.
+                    cursor.execute("delete from locks"
+                                   "  where unique_name = ?",
+                                   (self.unique_name,))
+                    self.connection.commit()
+                else:
+                    # Yup.  We're done, so go home.
+                    return
+            else:
+                # Check to see if we are the only lock holder.
+                cursor.execute("select * from locks"
+                               "  where unique_name = ?",
+                               (self.unique_name,))
+                rows = cursor.fetchall()
+                if len(rows) == 1:
+                    # We're the locker, so go home.
+                    return
+
+            # Maybe we should wait a bit longer.
+            if timeout is not None and time.time() > end_time:
+                if timeout > 0:
+                    # No more waiting.
+                    raise LockTimeout("Timeout waiting to acquire"
+                                      " lock for %s" %
+                                      self.path)
+                else:
+                    # Someone else has the lock and we are impatient..
+                    raise AlreadyLocked("%s is already locked" % self.path)
+
+            # Well, okay.  We'll give it a bit longer.
+            time.sleep(wait)
+
+    def release(self):
+        if not self.is_locked():
+            raise NotLocked("%s is not locked" % self.path)
+        if not self.i_am_locking():
+            raise NotMyLock("%s is locked, but not by me (by %s)" %
+                            (self.unique_name, self._who_is_locking()))
+        cursor = self.connection.cursor()
+        cursor.execute("delete from locks"
+                       "  where unique_name = ?",
+                       (self.unique_name,))
+        self.connection.commit()
+
+    def _who_is_locking(self):
+        cursor = self.connection.cursor()
+        cursor.execute("select unique_name from locks"
+                       "  where lock_file = ?",
+                       (self.lock_file,))
+        return cursor.fetchone()[0]
+
+    def is_locked(self):
+        cursor = self.connection.cursor()
+        cursor.execute("select * from locks"
+                       "  where lock_file = ?",
+                       (self.lock_file,))
+        rows = cursor.fetchall()
+        return not not rows
+
+    def i_am_locking(self):
+        cursor = self.connection.cursor()
+        cursor.execute("select * from locks"
+                       "  where lock_file = ?"
+                       "    and unique_name = ?",
+                       (self.lock_file, self.unique_name))
+        return not not cursor.fetchall()
+
+    def break_lock(self):
+        cursor = self.connection.cursor()
+        cursor.execute("delete from locks"
+                       "  where lock_file = ?",
+                       (self.lock_file,))
+        self.connection.commit()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/symlinklockfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/symlinklockfile.py
new file mode 100644
index 00000000..23b41f58
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/lockfile/symlinklockfile.py
@@ -0,0 +1,70 @@
+from __future__ import absolute_import
+
+import os
+import time
+
+from . import (LockBase, NotLocked, NotMyLock, LockTimeout,
+               AlreadyLocked)
+
+
+class SymlinkLockFile(LockBase):
+    """Lock access to a file using symlink(2)."""
+
+    def __init__(self, path, threaded=True, timeout=None):
+        # super(SymlinkLockFile).__init(...)
+        LockBase.__init__(self, path, threaded, timeout)
+        # split it back!
+        self.unique_name = os.path.split(self.unique_name)[1]
+
+    def acquire(self, timeout=None):
+        # Hopefully unnecessary for symlink.
+        # try:
+        #     open(self.unique_name, "wb").close()
+        # except IOError:
+        #     raise LockFailed("failed to create %s" % self.unique_name)
+        timeout = timeout if timeout is not None else self.timeout
+        end_time = time.time()
+        if timeout is not None and timeout > 0:
+            end_time += timeout
+
+        while True:
+            # Try and create a symbolic link to it.
+            try:
+                os.symlink(self.unique_name, self.lock_file)
+            except OSError:
+                # Link creation failed.  Maybe we've double-locked?
+                if self.i_am_locking():
+                    # Linked to out unique name. Proceed.
+                    return
+                else:
+                    # Otherwise the lock creation failed.
+                    if timeout is not None and time.time() > end_time:
+                        if timeout > 0:
+                            raise LockTimeout("Timeout waiting to acquire"
+                                              " lock for %s" %
+                                              self.path)
+                        else:
+                            raise AlreadyLocked("%s is already locked" %
+                                                self.path)
+                    time.sleep(timeout / 10 if timeout is not None else 0.1)
+            else:
+                # Link creation succeeded.  We're good to go.
+                return
+
+    def release(self):
+        if not self.is_locked():
+            raise NotLocked("%s is not locked" % self.path)
+        elif not self.i_am_locking():
+            raise NotMyLock("%s is locked, but not by me" % self.path)
+        os.unlink(self.lock_file)
+
+    def is_locked(self):
+        return os.path.islink(self.lock_file)
+
+    def i_am_locking(self):
+        return (os.path.islink(self.lock_file)
+                and os.readlink(self.lock_file) == self.unique_name)
+
+    def break_lock(self):
+        if os.path.islink(self.lock_file):  # exists && link
+            os.unlink(self.lock_file)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__init__.py
new file mode 100644
index 00000000..b3265075
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__init__.py
@@ -0,0 +1,65 @@
+# coding: utf-8
+from pip._vendor.msgpack._version import version
+from pip._vendor.msgpack.exceptions import *
+
+from collections import namedtuple
+
+
+class ExtType(namedtuple('ExtType', 'code data')):
+    """ExtType represents ext type in msgpack."""
+    def __new__(cls, code, data):
+        if not isinstance(code, int):
+            raise TypeError("code must be int")
+        if not isinstance(data, bytes):
+            raise TypeError("data must be bytes")
+        if not 0 <= code <= 127:
+            raise ValueError("code must be 0~127")
+        return super(ExtType, cls).__new__(cls, code, data)
+
+
+import os
+if os.environ.get('MSGPACK_PUREPYTHON'):
+    from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
+else:
+    try:
+        from pip._vendor.msgpack._cmsgpack import Packer, unpackb, Unpacker
+    except ImportError:
+        from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
+
+
+def pack(o, stream, **kwargs):
+    """
+    Pack object `o` and write it to `stream`
+
+    See :class:`Packer` for options.
+    """
+    packer = Packer(**kwargs)
+    stream.write(packer.pack(o))
+
+
+def packb(o, **kwargs):
+    """
+    Pack object `o` and return packed bytes
+
+    See :class:`Packer` for options.
+    """
+    return Packer(**kwargs).pack(o)
+
+
+def unpack(stream, **kwargs):
+    """
+    Unpack an object from `stream`.
+
+    Raises `ExtraData` when `stream` contains extra bytes.
+    See :class:`Unpacker` for options.
+    """
+    data = stream.read()
+    return unpackb(data, **kwargs)
+
+
+# alias for compatibility to simplejson/marshal/pickle.
+load = unpack
+loads = unpackb
+
+dump = pack
+dumps = packb
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..6005e61c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/_version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/_version.cpython-37.pyc
new file mode 100644
index 00000000..08709af5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/_version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-37.pyc
new file mode 100644
index 00000000..f90fa944
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-37.pyc
new file mode 100644
index 00000000..d4611aea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/_version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/_version.py
new file mode 100644
index 00000000..926c5e7b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/_version.py
@@ -0,0 +1 @@
+version = (0, 6, 1)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/exceptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/exceptions.py
new file mode 100644
index 00000000..d6d2615c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/exceptions.py
@@ -0,0 +1,48 @@
+class UnpackException(Exception):
+    """Base class for some exceptions raised while unpacking.
+
+    NOTE: unpack may raise exception other than subclass of
+    UnpackException.  If you want to catch all error, catch
+    Exception instead.
+    """
+
+
+class BufferFull(UnpackException):
+    pass
+
+
+class OutOfData(UnpackException):
+    pass
+
+
+class FormatError(ValueError, UnpackException):
+    """Invalid msgpack format"""
+
+
+class StackError(ValueError, UnpackException):
+    """Too nested"""
+
+
+# Deprecated.  Use ValueError instead
+UnpackValueError = ValueError
+
+
+class ExtraData(UnpackValueError):
+    """ExtraData is raised when there is trailing data.
+
+    This exception is raised while only one-shot (not streaming)
+    unpack.
+    """
+
+    def __init__(self, unpacked, extra):
+        self.unpacked = unpacked
+        self.extra = extra
+
+    def __str__(self):
+        return "unpack(b) received extra data."
+
+
+# Deprecated.  Use Exception instead to catch all exception during packing.
+PackException = Exception
+PackValueError = ValueError
+PackOverflowError = OverflowError
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/fallback.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/fallback.py
new file mode 100644
index 00000000..5b731ddd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/msgpack/fallback.py
@@ -0,0 +1,1027 @@
+"""Fallback pure Python implementation of msgpack"""
+
+import sys
+import struct
+import warnings
+
+
+if sys.version_info[0] == 2:
+    PY2 = True
+    int_types = (int, long)
+    def dict_iteritems(d):
+        return d.iteritems()
+else:
+    PY2 = False
+    int_types = int
+    unicode = str
+    xrange = range
+    def dict_iteritems(d):
+        return d.items()
+
+if sys.version_info < (3, 5):
+    # Ugly hack...
+    RecursionError = RuntimeError
+
+    def _is_recursionerror(e):
+        return len(e.args) == 1 and isinstance(e.args[0], str) and \
+            e.args[0].startswith('maximum recursion depth exceeded')
+else:
+    def _is_recursionerror(e):
+        return True
+
+if hasattr(sys, 'pypy_version_info'):
+    # cStringIO is slow on PyPy, StringIO is faster.  However: PyPy's own
+    # StringBuilder is fastest.
+    from __pypy__ import newlist_hint
+    try:
+        from __pypy__.builders import BytesBuilder as StringBuilder
+    except ImportError:
+        from __pypy__.builders import StringBuilder
+    USING_STRINGBUILDER = True
+    class StringIO(object):
+        def __init__(self, s=b''):
+            if s:
+                self.builder = StringBuilder(len(s))
+                self.builder.append(s)
+            else:
+                self.builder = StringBuilder()
+        def write(self, s):
+            if isinstance(s, memoryview):
+                s = s.tobytes()
+            elif isinstance(s, bytearray):
+                s = bytes(s)
+            self.builder.append(s)
+        def getvalue(self):
+            return self.builder.build()
+else:
+    USING_STRINGBUILDER = False
+    from io import BytesIO as StringIO
+    newlist_hint = lambda size: []
+
+
+from pip._vendor.msgpack.exceptions import (
+    BufferFull,
+    OutOfData,
+    ExtraData,
+    FormatError,
+    StackError,
+)
+
+from pip._vendor.msgpack import ExtType
+
+
+EX_SKIP                 = 0
+EX_CONSTRUCT            = 1
+EX_READ_ARRAY_HEADER    = 2
+EX_READ_MAP_HEADER      = 3
+
+TYPE_IMMEDIATE          = 0
+TYPE_ARRAY              = 1
+TYPE_MAP                = 2
+TYPE_RAW                = 3
+TYPE_BIN                = 4
+TYPE_EXT                = 5
+
+DEFAULT_RECURSE_LIMIT = 511
+
+
+def _check_type_strict(obj, t, type=type, tuple=tuple):
+    if type(t) is tuple:
+        return type(obj) in t
+    else:
+        return type(obj) is t
+
+
+def _get_data_from_buffer(obj):
+    try:
+        view = memoryview(obj)
+    except TypeError:
+        # try to use legacy buffer protocol if 2.7, otherwise re-raise
+        if PY2:
+            view = memoryview(buffer(obj))
+            warnings.warn("using old buffer interface to unpack %s; "
+                          "this leads to unpacking errors if slicing is used and "
+                          "will be removed in a future version" % type(obj),
+                          RuntimeWarning, stacklevel=3)
+        else:
+            raise
+    if view.itemsize != 1:
+        raise ValueError("cannot unpack from multi-byte object")
+    return view
+
+
+def unpack(stream, **kwargs):
+    warnings.warn(
+        "Direct calling implementation's unpack() is deprecated, Use msgpack.unpack() or unpackb() instead.",
+        DeprecationWarning, stacklevel=2)
+    data = stream.read()
+    return unpackb(data, **kwargs)
+
+
+def unpackb(packed, **kwargs):
+    """
+    Unpack an object from `packed`.
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``ValueError`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+
+    See :class:`Unpacker` for options.
+    """
+    unpacker = Unpacker(None, max_buffer_size=len(packed), **kwargs)
+    unpacker.feed(packed)
+    try:
+        ret = unpacker._unpack()
+    except OutOfData:
+        raise ValueError("Unpack failed: incomplete input")
+    except RecursionError as e:
+        if _is_recursionerror(e):
+            raise StackError
+        raise
+    if unpacker._got_extradata():
+        raise ExtraData(ret, unpacker._get_extradata())
+    return ret
+
+
+if sys.version_info < (2, 7, 6):
+    def _unpack_from(f, b, o=0):
+        """Explicit typcast for legacy struct.unpack_from"""
+        return struct.unpack_from(f, bytes(b), o)
+else:
+    _unpack_from = struct.unpack_from
+
+
+class Unpacker(object):
+    """Streaming unpacker.
+
+    arguments:
+
+    :param file_like:
+        File-like object having `.read(n)` method.
+        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
+
+    :param int read_size:
+        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
+
+    :param bool use_list:
+        If true, unpack msgpack array to Python list.
+        Otherwise, unpack to Python tuple. (default: True)
+
+    :param bool raw:
+        If true, unpack msgpack raw to Python bytes (default).
+        Otherwise, unpack to Python str (or unicode on Python 2) by decoding
+        with UTF-8 encoding (recommended).
+        Currently, the default is true, but it will be changed to false in
+        near future.  So you must specify it explicitly for keeping backward
+        compatibility.
+
+        *encoding* option which is deprecated overrides this option.
+
+    :param bool strict_map_key:
+        If true, only str or bytes are accepted for map (dict) keys.
+        It's False by default for backward-compatibility.
+        But it will be True from msgpack 1.0.
+
+    :param callable object_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a dict argument after unpacking msgpack map.
+        (See also simplejson)
+
+    :param callable object_pairs_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
+        (See also simplejson)
+
+    :param str encoding:
+        Encoding used for decoding msgpack raw.
+        If it is None (default), msgpack raw is deserialized to Python bytes.
+
+    :param str unicode_errors:
+        (deprecated) Used for decoding msgpack raw with *encoding*.
+        (default: `'strict'`)
+
+    :param int max_buffer_size:
+        Limits size of data waiting unpacked.  0 means system's INT_MAX (default).
+        Raises `BufferFull` exception when it is insufficient.
+        You should set this parameter when unpacking data from untrusted source.
+
+    :param int max_str_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of str. (default: max_buffer_size or 1024*1024)
+
+    :param int max_bin_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of bin. (default: max_buffer_size or 1024*1024)
+
+    :param int max_array_len:
+        Limits max length of array.
+        (default: max_buffer_size or 128*1024)
+
+    :param int max_map_len:
+        Limits max length of map.
+        (default: max_buffer_size//2 or 32*1024)
+
+    :param int max_ext_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max size of ext type.  (default: max_buffer_size or 1024*1024)
+
+    Example of streaming deserialize from file-like object::
+
+        unpacker = Unpacker(file_like, raw=False, max_buffer_size=10*1024*1024)
+        for o in unpacker:
+            process(o)
+
+    Example of streaming deserialize from socket::
+
+        unpacker = Unpacker(raw=False, max_buffer_size=10*1024*1024)
+        while True:
+            buf = sock.recv(1024**2)
+            if not buf:
+                break
+            unpacker.feed(buf)
+            for o in unpacker:
+                process(o)
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``OutOfData`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+    """
+
+    def __init__(self, file_like=None, read_size=0, use_list=True, raw=True, strict_map_key=False,
+                 object_hook=None, object_pairs_hook=None, list_hook=None,
+                 encoding=None, unicode_errors=None, max_buffer_size=0,
+                 ext_hook=ExtType,
+                 max_str_len=-1,
+                 max_bin_len=-1,
+                 max_array_len=-1,
+                 max_map_len=-1,
+                 max_ext_len=-1):
+        if encoding is not None:
+            warnings.warn(
+                "encoding is deprecated, Use raw=False instead.",
+                DeprecationWarning, stacklevel=2)
+
+        if unicode_errors is None:
+            unicode_errors = 'strict'
+
+        if file_like is None:
+            self._feeding = True
+        else:
+            if not callable(file_like.read):
+                raise TypeError("`file_like.read` must be callable")
+            self.file_like = file_like
+            self._feeding = False
+
+        #: array of bytes fed.
+        self._buffer = bytearray()
+        #: Which position we currently reads
+        self._buff_i = 0
+
+        # When Unpacker is used as an iterable, between the calls to next(),
+        # the buffer is not "consumed" completely, for efficiency sake.
+        # Instead, it is done sloppily.  To make sure we raise BufferFull at
+        # the correct moments, we have to keep track of how sloppy we were.
+        # Furthermore, when the buffer is incomplete (that is: in the case
+        # we raise an OutOfData) we need to rollback the buffer to the correct
+        # state, which _buf_checkpoint records.
+        self._buf_checkpoint = 0
+
+        if max_str_len == -1:
+            max_str_len = max_buffer_size or 1024*1024
+        if max_bin_len == -1:
+            max_bin_len = max_buffer_size or 1024*1024
+        if max_array_len == -1:
+            max_array_len = max_buffer_size or 128*1024
+        if max_map_len == -1:
+            max_map_len = max_buffer_size//2 or 32*1024
+        if max_ext_len == -1:
+            max_ext_len = max_buffer_size or 1024*1024
+
+        self._max_buffer_size = max_buffer_size or 2**31-1
+        if read_size > self._max_buffer_size:
+            raise ValueError("read_size must be smaller than max_buffer_size")
+        self._read_size = read_size or min(self._max_buffer_size, 16*1024)
+        self._raw = bool(raw)
+        self._strict_map_key = bool(strict_map_key)
+        self._encoding = encoding
+        self._unicode_errors = unicode_errors
+        self._use_list = use_list
+        self._list_hook = list_hook
+        self._object_hook = object_hook
+        self._object_pairs_hook = object_pairs_hook
+        self._ext_hook = ext_hook
+        self._max_str_len = max_str_len
+        self._max_bin_len = max_bin_len
+        self._max_array_len = max_array_len
+        self._max_map_len = max_map_len
+        self._max_ext_len = max_ext_len
+        self._stream_offset = 0
+
+        if list_hook is not None and not callable(list_hook):
+            raise TypeError('`list_hook` is not callable')
+        if object_hook is not None and not callable(object_hook):
+            raise TypeError('`object_hook` is not callable')
+        if object_pairs_hook is not None and not callable(object_pairs_hook):
+            raise TypeError('`object_pairs_hook` is not callable')
+        if object_hook is not None and object_pairs_hook is not None:
+            raise TypeError("object_pairs_hook and object_hook are mutually "
+                            "exclusive")
+        if not callable(ext_hook):
+            raise TypeError("`ext_hook` is not callable")
+
+    def feed(self, next_bytes):
+        assert self._feeding
+        view = _get_data_from_buffer(next_bytes)
+        if (len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size):
+            raise BufferFull
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[:self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
+        self._buffer.extend(view)
+
+    def _consume(self):
+        """ Gets rid of the used parts of the buffer. """
+        self._stream_offset += self._buff_i - self._buf_checkpoint
+        self._buf_checkpoint = self._buff_i
+
+    def _got_extradata(self):
+        return self._buff_i < len(self._buffer)
+
+    def _get_extradata(self):
+        return self._buffer[self._buff_i:]
+
+    def read_bytes(self, n):
+        return self._read(n)
+
+    def _read(self, n):
+        # (int) -> bytearray
+        self._reserve(n)
+        i = self._buff_i
+        self._buff_i = i+n
+        return self._buffer[i:i+n]
+
+    def _reserve(self, n):
+        remain_bytes = len(self._buffer) - self._buff_i - n
+
+        # Fast path: buffer has n bytes already
+        if remain_bytes >= 0:
+            return
+
+        if self._feeding:
+            self._buff_i = self._buf_checkpoint
+            raise OutOfData
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[:self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Read from file
+        remain_bytes = -remain_bytes
+        while remain_bytes > 0:
+            to_read_bytes = max(self._read_size, remain_bytes)
+            read_data = self.file_like.read(to_read_bytes)
+            if not read_data:
+                break
+            assert isinstance(read_data, bytes)
+            self._buffer += read_data
+            remain_bytes -= len(read_data)
+
+        if len(self._buffer) < n + self._buff_i:
+            self._buff_i = 0  # rollback
+            raise OutOfData
+
+    def _read_header(self, execute=EX_CONSTRUCT):
+        typ = TYPE_IMMEDIATE
+        n = 0
+        obj = None
+        self._reserve(1)
+        b = self._buffer[self._buff_i]
+        self._buff_i += 1
+        if b & 0b10000000 == 0:
+            obj = b
+        elif b & 0b11100000 == 0b11100000:
+            obj = -1 - (b ^ 0xff)
+        elif b & 0b11100000 == 0b10100000:
+            n = b & 0b00011111
+            typ = TYPE_RAW
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b & 0b11110000 == 0b10010000:
+            n = b & 0b00001111
+            typ = TYPE_ARRAY
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b & 0b11110000 == 0b10000000:
+            n = b & 0b00001111
+            typ = TYPE_MAP
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+        elif b == 0xc0:
+            obj = None
+        elif b == 0xc2:
+            obj = False
+        elif b == 0xc3:
+            obj = True
+        elif b == 0xc4:
+            typ = TYPE_BIN
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xc5:
+            typ = TYPE_BIN
+            self._reserve(2)
+            n = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xc6:
+            typ = TYPE_BIN
+            self._reserve(4)
+            n = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xc7:  # ext 8
+            typ = TYPE_EXT
+            self._reserve(2)
+            L, n = _unpack_from('Bb', self._buffer, self._buff_i)
+            self._buff_i += 2
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xc8:  # ext 16
+            typ = TYPE_EXT
+            self._reserve(3)
+            L, n = _unpack_from('>Hb', self._buffer, self._buff_i)
+            self._buff_i += 3
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xc9:  # ext 32
+            typ = TYPE_EXT
+            self._reserve(5)
+            L, n = _unpack_from('>Ib', self._buffer, self._buff_i)
+            self._buff_i += 5
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xca:
+            self._reserve(4)
+            obj = _unpack_from(">f", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xcb:
+            self._reserve(8)
+            obj = _unpack_from(">d", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xcc:
+            self._reserve(1)
+            obj = self._buffer[self._buff_i]
+            self._buff_i += 1
+        elif b == 0xcd:
+            self._reserve(2)
+            obj = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xce:
+            self._reserve(4)
+            obj = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xcf:
+            self._reserve(8)
+            obj = _unpack_from(">Q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xd0:
+            self._reserve(1)
+            obj = _unpack_from("b", self._buffer, self._buff_i)[0]
+            self._buff_i += 1
+        elif b == 0xd1:
+            self._reserve(2)
+            obj = _unpack_from(">h", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xd2:
+            self._reserve(4)
+            obj = _unpack_from(">i", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xd3:
+            self._reserve(8)
+            obj = _unpack_from(">q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xd4:  # fixext 1
+            typ = TYPE_EXT
+            if self._max_ext_len < 1:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (1, self._max_ext_len))
+            self._reserve(2)
+            n, obj = _unpack_from("b1s", self._buffer, self._buff_i)
+            self._buff_i += 2
+        elif b == 0xd5:  # fixext 2
+            typ = TYPE_EXT
+            if self._max_ext_len < 2:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (2, self._max_ext_len))
+            self._reserve(3)
+            n, obj = _unpack_from("b2s", self._buffer, self._buff_i)
+            self._buff_i += 3
+        elif b == 0xd6:  # fixext 4
+            typ = TYPE_EXT
+            if self._max_ext_len < 4:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (4, self._max_ext_len))
+            self._reserve(5)
+            n, obj = _unpack_from("b4s", self._buffer, self._buff_i)
+            self._buff_i += 5
+        elif b == 0xd7:  # fixext 8
+            typ = TYPE_EXT
+            if self._max_ext_len < 8:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (8, self._max_ext_len))
+            self._reserve(9)
+            n, obj = _unpack_from("b8s", self._buffer, self._buff_i)
+            self._buff_i += 9
+        elif b == 0xd8:  # fixext 16
+            typ = TYPE_EXT
+            if self._max_ext_len < 16:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (16, self._max_ext_len))
+            self._reserve(17)
+            n, obj = _unpack_from("b16s", self._buffer, self._buff_i)
+            self._buff_i += 17
+        elif b == 0xd9:
+            typ = TYPE_RAW
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xda:
+            typ = TYPE_RAW
+            self._reserve(2)
+            n, = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xdb:
+            typ = TYPE_RAW
+            self._reserve(4)
+            n, = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xdc:
+            typ = TYPE_ARRAY
+            self._reserve(2)
+            n, = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xdd:
+            typ = TYPE_ARRAY
+            self._reserve(4)
+            n, = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xde:
+            self._reserve(2)
+            n, = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        elif b == 0xdf:
+            self._reserve(4)
+            n, = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        else:
+            raise FormatError("Unknown header: 0x%x" % b)
+        return typ, n, obj
+
+    def _unpack(self, execute=EX_CONSTRUCT):
+        typ, n, obj = self._read_header(execute)
+
+        if execute == EX_READ_ARRAY_HEADER:
+            if typ != TYPE_ARRAY:
+                raise ValueError("Expected array")
+            return n
+        if execute == EX_READ_MAP_HEADER:
+            if typ != TYPE_MAP:
+                raise ValueError("Expected map")
+            return n
+        # TODO should we eliminate the recursion?
+        if typ == TYPE_ARRAY:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call `list_hook`
+                    self._unpack(EX_SKIP)
+                return
+            ret = newlist_hint(n)
+            for i in xrange(n):
+                ret.append(self._unpack(EX_CONSTRUCT))
+            if self._list_hook is not None:
+                ret = self._list_hook(ret)
+            # TODO is the interaction between `list_hook` and `use_list` ok?
+            return ret if self._use_list else tuple(ret)
+        if typ == TYPE_MAP:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call hooks
+                    self._unpack(EX_SKIP)
+                    self._unpack(EX_SKIP)
+                return
+            if self._object_pairs_hook is not None:
+                ret = self._object_pairs_hook(
+                    (self._unpack(EX_CONSTRUCT),
+                     self._unpack(EX_CONSTRUCT))
+                    for _ in xrange(n))
+            else:
+                ret = {}
+                for _ in xrange(n):
+                    key = self._unpack(EX_CONSTRUCT)
+                    if self._strict_map_key and type(key) not in (unicode, bytes):
+                        raise ValueError("%s is not allowed for map key" % str(type(key)))
+                    ret[key] = self._unpack(EX_CONSTRUCT)
+                if self._object_hook is not None:
+                    ret = self._object_hook(ret)
+            return ret
+        if execute == EX_SKIP:
+            return
+        if typ == TYPE_RAW:
+            if self._encoding is not None:
+                obj = obj.decode(self._encoding, self._unicode_errors)
+            elif self._raw:
+                obj = bytes(obj)
+            else:
+                obj = obj.decode('utf_8')
+            return obj
+        if typ == TYPE_EXT:
+            return self._ext_hook(n, bytes(obj))
+        if typ == TYPE_BIN:
+            return bytes(obj)
+        assert typ == TYPE_IMMEDIATE
+        return obj
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+            self._consume()
+            return ret
+        except OutOfData:
+            self._consume()
+            raise StopIteration
+        except RecursionError:
+            raise StackError
+
+    next = __next__
+
+    def skip(self):
+        self._unpack(EX_SKIP)
+        self._consume()
+
+    def unpack(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+        except RecursionError:
+            raise StackError
+        self._consume()
+        return ret
+
+    def read_array_header(self):
+        ret = self._unpack(EX_READ_ARRAY_HEADER)
+        self._consume()
+        return ret
+
+    def read_map_header(self):
+        ret = self._unpack(EX_READ_MAP_HEADER)
+        self._consume()
+        return ret
+
+    def tell(self):
+        return self._stream_offset
+
+
+class Packer(object):
+    """
+    MessagePack Packer
+
+    usage:
+
+        packer = Packer()
+        astream.write(packer.pack(a))
+        astream.write(packer.pack(b))
+
+    Packer's constructor has some keyword arguments:
+
+    :param callable default:
+        Convert user type to builtin type that Packer supports.
+        See also simplejson's document.
+
+    :param bool use_single_float:
+        Use single precision float type for float. (default: False)
+
+    :param bool autoreset:
+        Reset buffer after each pack and return its content as `bytes`. (default: True).
+        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
+
+    :param bool use_bin_type:
+        Use bin type introduced in msgpack spec 2.0 for bytes.
+        It also enables str8 type for unicode.
+
+    :param bool strict_types:
+        If set to true, types will be checked to be exact. Derived classes
+        from serializeable types will not be serialized and will be
+        treated as unsupported type and forwarded to default.
+        Additionally tuples will not be serialized as lists.
+        This is useful when trying to implement accurate serialization
+        for python types.
+
+    :param str encoding:
+        (deprecated) Convert unicode to bytes with this encoding. (default: 'utf-8')
+
+    :param str unicode_errors:
+        Error handler for encoding unicode. (default: 'strict')
+    """
+    def __init__(self, default=None, encoding=None, unicode_errors=None,
+                 use_single_float=False, autoreset=True, use_bin_type=False,
+                 strict_types=False):
+        if encoding is None:
+            encoding = 'utf_8'
+        else:
+            warnings.warn(
+                "encoding is deprecated, Use raw=False instead.",
+                DeprecationWarning, stacklevel=2)
+
+        if unicode_errors is None:
+            unicode_errors = 'strict'
+
+        self._strict_types = strict_types
+        self._use_float = use_single_float
+        self._autoreset = autoreset
+        self._use_bin_type = use_bin_type
+        self._encoding = encoding
+        self._unicode_errors = unicode_errors
+        self._buffer = StringIO()
+        if default is not None:
+            if not callable(default):
+                raise TypeError("default must be callable")
+        self._default = default
+
+    def _pack(self, obj, nest_limit=DEFAULT_RECURSE_LIMIT,
+              check=isinstance, check_type_strict=_check_type_strict):
+        default_used = False
+        if self._strict_types:
+            check = check_type_strict
+            list_types = list
+        else:
+            list_types = (list, tuple)
+        while True:
+            if nest_limit < 0:
+                raise ValueError("recursion limit exceeded")
+            if obj is None:
+                return self._buffer.write(b"\xc0")
+            if check(obj, bool):
+                if obj:
+                    return self._buffer.write(b"\xc3")
+                return self._buffer.write(b"\xc2")
+            if check(obj, int_types):
+                if 0 <= obj < 0x80:
+                    return self._buffer.write(struct.pack("B", obj))
+                if -0x20 <= obj < 0:
+                    return self._buffer.write(struct.pack("b", obj))
+                if 0x80 <= obj <= 0xff:
+                    return self._buffer.write(struct.pack("BB", 0xcc, obj))
+                if -0x80 <= obj < 0:
+                    return self._buffer.write(struct.pack(">Bb", 0xd0, obj))
+                if 0xff < obj <= 0xffff:
+                    return self._buffer.write(struct.pack(">BH", 0xcd, obj))
+                if -0x8000 <= obj < -0x80:
+                    return self._buffer.write(struct.pack(">Bh", 0xd1, obj))
+                if 0xffff < obj <= 0xffffffff:
+                    return self._buffer.write(struct.pack(">BI", 0xce, obj))
+                if -0x80000000 <= obj < -0x8000:
+                    return self._buffer.write(struct.pack(">Bi", 0xd2, obj))
+                if 0xffffffff < obj <= 0xffffffffffffffff:
+                    return self._buffer.write(struct.pack(">BQ", 0xcf, obj))
+                if -0x8000000000000000 <= obj < -0x80000000:
+                    return self._buffer.write(struct.pack(">Bq", 0xd3, obj))
+                if not default_used and self._default is not None:
+                    obj = self._default(obj)
+                    default_used = True
+                    continue
+                raise OverflowError("Integer value out of range")
+            if check(obj, (bytes, bytearray)):
+                n = len(obj)
+                if n >= 2**32:
+                    raise ValueError("%s is too large" % type(obj).__name__)
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, unicode):
+                if self._encoding is None:
+                    raise TypeError(
+                        "Can't encode unicode string: "
+                        "no encoding is specified")
+                obj = obj.encode(self._encoding, self._unicode_errors)
+                n = len(obj)
+                if n >= 2**32:
+                    raise ValueError("String is too large")
+                self._pack_raw_header(n)
+                return self._buffer.write(obj)
+            if check(obj, memoryview):
+                n = len(obj) * obj.itemsize
+                if n >= 2**32:
+                    raise ValueError("Memoryview is too large")
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, float):
+                if self._use_float:
+                    return self._buffer.write(struct.pack(">Bf", 0xca, obj))
+                return self._buffer.write(struct.pack(">Bd", 0xcb, obj))
+            if check(obj, ExtType):
+                code = obj.code
+                data = obj.data
+                assert isinstance(code, int)
+                assert isinstance(data, bytes)
+                L = len(data)
+                if L == 1:
+                    self._buffer.write(b'\xd4')
+                elif L == 2:
+                    self._buffer.write(b'\xd5')
+                elif L == 4:
+                    self._buffer.write(b'\xd6')
+                elif L == 8:
+                    self._buffer.write(b'\xd7')
+                elif L == 16:
+                    self._buffer.write(b'\xd8')
+                elif L <= 0xff:
+                    self._buffer.write(struct.pack(">BB", 0xc7, L))
+                elif L <= 0xffff:
+                    self._buffer.write(struct.pack(">BH", 0xc8, L))
+                else:
+                    self._buffer.write(struct.pack(">BI", 0xc9, L))
+                self._buffer.write(struct.pack("b", code))
+                self._buffer.write(data)
+                return
+            if check(obj, list_types):
+                n = len(obj)
+                self._pack_array_header(n)
+                for i in xrange(n):
+                    self._pack(obj[i], nest_limit - 1)
+                return
+            if check(obj, dict):
+                return self._pack_map_pairs(len(obj), dict_iteritems(obj),
+                                               nest_limit - 1)
+            if not default_used and self._default is not None:
+                obj = self._default(obj)
+                default_used = 1
+                continue
+            raise TypeError("Cannot serialize %r" % (obj, ))
+
+    def pack(self, obj):
+        try:
+            self._pack(obj)
+        except:
+            self._buffer = StringIO()  # force reset
+            raise
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_pairs(self, pairs):
+        self._pack_map_pairs(len(pairs), pairs)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_array_header(self, n):
+        if n >= 2**32:
+            raise ValueError
+        self._pack_array_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_header(self, n):
+        if n >= 2**32:
+            raise ValueError
+        self._pack_map_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_ext_type(self, typecode, data):
+        if not isinstance(typecode, int):
+            raise TypeError("typecode must have int type.")
+        if not 0 <= typecode <= 127:
+            raise ValueError("typecode should be 0-127")
+        if not isinstance(data, bytes):
+            raise TypeError("data must have bytes type")
+        L = len(data)
+        if L > 0xffffffff:
+            raise ValueError("Too large data")
+        if L == 1:
+            self._buffer.write(b'\xd4')
+        elif L == 2:
+            self._buffer.write(b'\xd5')
+        elif L == 4:
+            self._buffer.write(b'\xd6')
+        elif L == 8:
+            self._buffer.write(b'\xd7')
+        elif L == 16:
+            self._buffer.write(b'\xd8')
+        elif L <= 0xff:
+            self._buffer.write(b'\xc7' + struct.pack('B', L))
+        elif L <= 0xffff:
+            self._buffer.write(b'\xc8' + struct.pack('>H', L))
+        else:
+            self._buffer.write(b'\xc9' + struct.pack('>I', L))
+        self._buffer.write(struct.pack('B', typecode))
+        self._buffer.write(data)
+
+    def _pack_array_header(self, n):
+        if n <= 0x0f:
+            return self._buffer.write(struct.pack('B', 0x90 + n))
+        if n <= 0xffff:
+            return self._buffer.write(struct.pack(">BH", 0xdc, n))
+        if n <= 0xffffffff:
+            return self._buffer.write(struct.pack(">BI", 0xdd, n))
+        raise ValueError("Array is too large")
+
+    def _pack_map_header(self, n):
+        if n <= 0x0f:
+            return self._buffer.write(struct.pack('B', 0x80 + n))
+        if n <= 0xffff:
+            return self._buffer.write(struct.pack(">BH", 0xde, n))
+        if n <= 0xffffffff:
+            return self._buffer.write(struct.pack(">BI", 0xdf, n))
+        raise ValueError("Dict is too large")
+
+    def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT):
+        self._pack_map_header(n)
+        for (k, v) in pairs:
+            self._pack(k, nest_limit - 1)
+            self._pack(v, nest_limit - 1)
+
+    def _pack_raw_header(self, n):
+        if n <= 0x1f:
+            self._buffer.write(struct.pack('B', 0xa0 + n))
+        elif self._use_bin_type and n <= 0xff:
+            self._buffer.write(struct.pack('>BB', 0xd9, n))
+        elif n <= 0xffff:
+            self._buffer.write(struct.pack(">BH", 0xda, n))
+        elif n <= 0xffffffff:
+            self._buffer.write(struct.pack(">BI", 0xdb, n))
+        else:
+            raise ValueError('Raw is too large')
+
+    def _pack_bin_header(self, n):
+        if not self._use_bin_type:
+            return self._pack_raw_header(n)
+        elif n <= 0xff:
+            return self._buffer.write(struct.pack('>BB', 0xc4, n))
+        elif n <= 0xffff:
+            return self._buffer.write(struct.pack(">BH", 0xc5, n))
+        elif n <= 0xffffffff:
+            return self._buffer.write(struct.pack(">BI", 0xc6, n))
+        else:
+            raise ValueError('Bin is too large')
+
+    def bytes(self):
+        """Return internal buffer contents as bytes object"""
+        return self._buffer.getvalue()
+
+    def reset(self):
+        """Reset internal buffer.
+
+        This method is usaful only when autoreset=False.
+        """
+        self._buffer = StringIO()
+
+    def getbuffer(self):
+        """Return view of internal buffer."""
+        if USING_STRINGBUILDER or PY2:
+            return memoryview(self.bytes())
+        else:
+            return self._buffer.getbuffer()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__about__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__about__.py
new file mode 100644
index 00000000..7481c9e2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__about__.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "19.0"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2019 %s" % __author__
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__init__.py
new file mode 100644
index 00000000..a0cf67df
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__init__.py
@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__,
+    __copyright__,
+    __email__,
+    __license__,
+    __summary__,
+    __title__,
+    __uri__,
+    __version__,
+)
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__about__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
new file mode 100644
index 00000000..f32de6ee
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..f3820b38
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
new file mode 100644
index 00000000..ad7504d6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
new file mode 100644
index 00000000..49b10b35
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-37.pyc
new file mode 100644
index 00000000..267d8aa3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
new file mode 100644
index 00000000..e8cf0361
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
new file mode 100644
index 00000000..95caa337
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..69352849
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-37.pyc
new file mode 100644
index 00000000..ce06da04
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_compat.py
new file mode 100644
index 00000000..25da473c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_compat.py
@@ -0,0 +1,31 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = (str,)
+else:
+    string_types = (basestring,)
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_structures.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_structures.py
new file mode 100644
index 00000000..68dcca63
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+
+NegativeInfinity = NegativeInfinity()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/markers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/markers.py
new file mode 100644
index 00000000..54824768
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/markers.py
@@ -0,0 +1,296 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from pip._vendor.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from pip._vendor.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from pip._vendor.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker",
+    "UndefinedComparison",
+    "UndefinedEnvironmentName",
+    "Marker",
+    "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version")
+    | L("platform_python_implementation")
+    | L("implementation_name")
+    | L("python_full_version")
+    | L("platform_release")
+    | L("platform_version")
+    | L("platform_machine")
+    | L("platform_system")
+    | L("python_version")
+    | L("sys_platform")
+    | L("os_name")
+    | L("os.name")
+    | L("sys.platform")  # PEP-345
+    | L("platform.version")  # PEP-345
+    | L("platform.machine")  # PEP-345
+    | L("platform.python_implementation")  # PEP-345
+    | L("python_implementation")  # PEP-345
+    | L("extra")  # undocumented setuptools legacy
+)
+ALIASES = {
+    "os.name": "os_name",
+    "sys.platform": "sys_platform",
+    "platform.version": "platform_version",
+    "platform.machine": "platform_machine",
+    "platform.python_implementation": "platform_python_implementation",
+    "python_implementation": "platform_python_implementation",
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (
+        isinstance(marker, list)
+        and len(marker) == 1
+        and isinstance(marker[0], (list, tuple))
+    ):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = "{0.major}.{0.minor}.{0.micro}".format(info)
+    kind = info.releaselevel
+    if kind != "final":
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, "implementation"):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = "0"
+        implementation_name = ""
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc : e.loc + 8]
+            )
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/requirements.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/requirements.py
new file mode 100644
index 00000000..dbc5f11d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/requirements.py
@@ -0,0 +1,138 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from pip._vendor.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from pip._vendor.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from pip._vendor.pyparsing import Literal as L  # noqa
+from pip._vendor.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r"[^ ]+")("url")
+URL = AT + URI
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(
+    VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
+)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start : t._original_end])
+)
+MARKER_SEPARATOR = SEMICOLON
+MARKER = MARKER_SEPARATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+# pyparsing isn't thread safe during initialization, so we do it eagerly, see
+# issue #104
+REQUIREMENT.parseString("x[]")
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                'Parse error at "{0!r}": {1}'.format(
+                    requirement_string[e.loc : e.loc + 8], e.msg
+                )
+            )
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if parsed_url.scheme == "file":
+                if urlparse.urlunparse(parsed_url) != req.url:
+                    raise InvalidRequirement("Invalid URL given")
+            elif not (parsed_url.scheme and parsed_url.netloc) or (
+                not parsed_url.scheme and not parsed_url.netloc
+            ):
+                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+            if self.marker:
+                parts.append(" ")
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/specifiers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/specifiers.py
new file mode 100644
index 00000000..743576a0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/specifiers.py
@@ -0,0 +1,749 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (match.group("operator").strip(), match.group("version").strip())
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if parsed_version.is_prerelease and not (
+                    prereleases or self.prereleases
+                ):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the beginning.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
+            prospective, prefix
+        )
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[: len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is technically greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]) :])
+    right_split.append(right[len(right_split[0]) :])
+
+    # Insert our padding
+    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
+    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
+
+    return (list(itertools.chain(*left_split)), list(itertools.chain(*right_split)))
+
+
+class SpecifierSet(BaseSpecifier):
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(s.contains(item, prereleases=prereleases) for s in self._specs)
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/utils.py
new file mode 100644
index 00000000..88418786
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/utils.py
@@ -0,0 +1,57 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+from .version import InvalidVersion, Version
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
+
+
+def canonicalize_version(version):
+    """
+    This is very similar to Version.__str__, but has one subtle differences
+    with the way it handles the release segment.
+    """
+
+    try:
+        version = Version(version)
+    except InvalidVersion:
+        # Legacy versions cannot be normalized
+        return version
+
+    parts = []
+
+    # Epoch
+    if version.epoch != 0:
+        parts.append("{0}!".format(version.epoch))
+
+    # Release segment
+    # NB: This strips trailing '.0's to normalize
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
+
+    # Pre-release
+    if version.pre is not None:
+        parts.append("".join(str(x) for x in version.pre))
+
+    # Post-release
+    if version.post is not None:
+        parts.append(".post{0}".format(version.post))
+
+    # Development release
+    if version.dev is not None:
+        parts.append(".dev{0}".format(version.dev))
+
+    # Local version segment
+    if version.local is not None:
+        parts.append("+{0}".format(version.local))
+
+    return "".join(parts)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/version.py
new file mode 100644
index 00000000..95157a1f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/packaging/version.py
@@ -0,0 +1,420 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
+
+
+_Version = collections.namedtuple(
+    "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def epoch(self):
+        return -1
+
+    @property
+    def release(self):
+        return None
+
+    @property
+    def pre(self):
+        return None
+
+    @property
+    def post(self):
+        return None
+
+    @property
+    def dev(self):
+        return None
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+    @property
+    def is_devrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE)
+
+_legacy_version_replacement_map = {
+    "pre": "c",
+    "preview": "c",
+    "-": "final-",
+    "rc": "c",
+    "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
+            post=_parse_letter_version(
+                match.group("post_l"), match.group("post_n1") or match.group("post_n2")
+            ),
+            dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        # Pre-release
+        if self.pre is not None:
+            parts.append("".join(str(x) for x in self.pre))
+
+        # Post-release
+        if self.post is not None:
+            parts.append(".post{0}".format(self.post))
+
+        # Development release
+        if self.dev is not None:
+            parts.append(".dev{0}".format(self.dev))
+
+        # Local version segment
+        if self.local is not None:
+            parts.append("+{0}".format(self.local))
+
+        return "".join(parts)
+
+    @property
+    def epoch(self):
+        return self._version.epoch
+
+    @property
+    def release(self):
+        return self._version.release
+
+    @property
+    def pre(self):
+        return self._version.pre
+
+    @property
+    def post(self):
+        return self._version.post[1] if self._version.post else None
+
+    @property
+    def dev(self):
+        return self._version.dev[1] if self._version.dev else None
+
+    @property
+    def local(self):
+        if self._version.local:
+            return ".".join(str(x) for x in self._version.local)
+        else:
+            return None
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        return "".join(parts)
+
+    @property
+    def is_prerelease(self):
+        return self.dev is not None or self.pre is not None
+
+    @property
+    def is_postrelease(self):
+        return self.post is not None
+
+    @property
+    def is_devrelease(self):
+        return self.dev is not None
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_separators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_separators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple((i, "") if isinstance(i, int) else (-Infinity, i) for i in local)
+
+    return epoch, release, pre, post, dev, local
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__init__.py
new file mode 100644
index 00000000..9c1a098f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__init__.py
@@ -0,0 +1,4 @@
+"""Wrappers to build Python packages using PEP 517 hooks
+"""
+
+__version__ = '0.5.0'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..10aa9fea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/_in_process.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/_in_process.cpython-37.pyc
new file mode 100644
index 00000000..55f8ff17
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/_in_process.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-37.pyc
new file mode 100644
index 00000000..1ec4c7b1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-37.pyc
new file mode 100644
index 00000000..34d3785b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-37.pyc
new file mode 100644
index 00000000..29f35461
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/compat.cpython-37.pyc
new file mode 100644
index 00000000..0ccab21c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-37.pyc
new file mode 100644
index 00000000..661eb0d4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-37.pyc
new file mode 100644
index 00000000..bc4b5616
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py
new file mode 100644
index 00000000..d6524b66
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py
@@ -0,0 +1,207 @@
+"""This is invoked in a subprocess to call the build backend hooks.
+
+It expects:
+- Command line args: hook_name, control_dir
+- Environment variable: PEP517_BUILD_BACKEND=entry.point:spec
+- control_dir/input.json:
+  - {"kwargs": {...}}
+
+Results:
+- control_dir/output.json
+  - {"return_val": ...}
+"""
+from glob import glob
+from importlib import import_module
+import os
+from os.path import join as pjoin
+import re
+import shutil
+import sys
+
+# This is run as a script, not a module, so it can't do a relative import
+import compat
+
+
+class BackendUnavailable(Exception):
+    """Raised if we cannot import the backend"""
+
+
+def _build_backend():
+    """Find and load the build backend"""
+    ep = os.environ['PEP517_BUILD_BACKEND']
+    mod_path, _, obj_path = ep.partition(':')
+    try:
+        obj = import_module(mod_path)
+    except ImportError:
+        raise BackendUnavailable
+    if obj_path:
+        for path_part in obj_path.split('.'):
+            obj = getattr(obj, path_part)
+    return obj
+
+
+def get_requires_for_build_wheel(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_wheel
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+def prepare_metadata_for_build_wheel(metadata_directory, config_settings):
+    """Invoke optional prepare_metadata_for_build_wheel
+
+    Implements a fallback by building a wheel if the hook isn't defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.prepare_metadata_for_build_wheel
+    except AttributeError:
+        return _get_wheel_metadata_from_wheel(backend, metadata_directory,
+                                              config_settings)
+    else:
+        return hook(metadata_directory, config_settings)
+
+
+WHEEL_BUILT_MARKER = 'PEP517_ALREADY_BUILT_WHEEL'
+
+
+def _dist_info_files(whl_zip):
+    """Identify the .dist-info folder inside a wheel ZipFile."""
+    res = []
+    for path in whl_zip.namelist():
+        m = re.match(r'[^/\\]+-[^/\\]+\.dist-info/', path)
+        if m:
+            res.append(path)
+    if res:
+        return res
+    raise Exception("No .dist-info folder found in wheel")
+
+
+def _get_wheel_metadata_from_wheel(
+        backend, metadata_directory, config_settings):
+    """Build a wheel and extract the metadata from it.
+
+    Fallback for when the build backend does not
+    define the 'get_wheel_metadata' hook.
+    """
+    from zipfile import ZipFile
+    whl_basename = backend.build_wheel(metadata_directory, config_settings)
+    with open(os.path.join(metadata_directory, WHEEL_BUILT_MARKER), 'wb'):
+        pass  # Touch marker file
+
+    whl_file = os.path.join(metadata_directory, whl_basename)
+    with ZipFile(whl_file) as zipf:
+        dist_info = _dist_info_files(zipf)
+        zipf.extractall(path=metadata_directory, members=dist_info)
+    return dist_info[0].split('/')[0]
+
+
+def _find_already_built_wheel(metadata_directory):
+    """Check for a wheel already built during the get_wheel_metadata hook.
+    """
+    if not metadata_directory:
+        return None
+    metadata_parent = os.path.dirname(metadata_directory)
+    if not os.path.isfile(pjoin(metadata_parent, WHEEL_BUILT_MARKER)):
+        return None
+
+    whl_files = glob(os.path.join(metadata_parent, '*.whl'))
+    if not whl_files:
+        print('Found wheel built marker, but no .whl files')
+        return None
+    if len(whl_files) > 1:
+        print('Found multiple .whl files; unspecified behaviour. '
+              'Will call build_wheel.')
+        return None
+
+    # Exactly one .whl file
+    return whl_files[0]
+
+
+def build_wheel(wheel_directory, config_settings, metadata_directory=None):
+    """Invoke the mandatory build_wheel hook.
+
+    If a wheel was already built in the
+    prepare_metadata_for_build_wheel fallback, this
+    will copy it rather than rebuilding the wheel.
+    """
+    prebuilt_whl = _find_already_built_wheel(metadata_directory)
+    if prebuilt_whl:
+        shutil.copy2(prebuilt_whl, wheel_directory)
+        return os.path.basename(prebuilt_whl)
+
+    return _build_backend().build_wheel(wheel_directory, config_settings,
+                                        metadata_directory)
+
+
+def get_requires_for_build_sdist(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_sdist
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+class _DummyException(Exception):
+    """Nothing should ever raise this exception"""
+
+
+class GotUnsupportedOperation(Exception):
+    """For internal use when backend raises UnsupportedOperation"""
+
+
+def build_sdist(sdist_directory, config_settings):
+    """Invoke the mandatory build_sdist hook."""
+    backend = _build_backend()
+    try:
+        return backend.build_sdist(sdist_directory, config_settings)
+    except getattr(backend, 'UnsupportedOperation', _DummyException):
+        raise GotUnsupportedOperation
+
+
+HOOK_NAMES = {
+    'get_requires_for_build_wheel',
+    'prepare_metadata_for_build_wheel',
+    'build_wheel',
+    'get_requires_for_build_sdist',
+    'build_sdist',
+}
+
+
+def main():
+    if len(sys.argv) < 3:
+        sys.exit("Needs args: hook_name, control_dir")
+    hook_name = sys.argv[1]
+    control_dir = sys.argv[2]
+    if hook_name not in HOOK_NAMES:
+        sys.exit("Unknown hook: %s" % hook_name)
+    hook = globals()[hook_name]
+
+    hook_input = compat.read_json(pjoin(control_dir, 'input.json'))
+
+    json_out = {'unsupported': False, 'return_val': None}
+    try:
+        json_out['return_val'] = hook(**hook_input['kwargs'])
+    except BackendUnavailable:
+        json_out['no_backend'] = True
+    except GotUnsupportedOperation:
+        json_out['unsupported'] = True
+
+    compat.write_json(json_out, pjoin(control_dir, 'output.json'), indent=2)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/build.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/build.py
new file mode 100644
index 00000000..ac6c9495
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/build.py
@@ -0,0 +1,108 @@
+"""Build a project using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+import contextlib
+from pip._vendor import pytoml
+import shutil
+import errno
+import tempfile
+
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+@contextlib.contextmanager
+def tempdir():
+    td = tempfile.mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+
+def _do_build(hooks, env, dist, dest):
+    get_requires_name = 'get_requires_for_build_{dist}'.format(**locals())
+    get_requires = getattr(hooks, get_requires_name)
+    reqs = get_requires({})
+    log.info('Got build requires: %s', reqs)
+
+    env.pip_install(reqs)
+    log.info('Installed dynamic build dependencies')
+
+    with tempdir() as td:
+        log.info('Trying to build %s in %s', dist, td)
+        build_name = 'build_{dist}'.format(**locals())
+        build = getattr(hooks, build_name)
+        filename = build(td, {})
+        source = os.path.join(td, filename)
+        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
+
+
+def mkdir_p(*args, **kwargs):
+    """Like `mkdir`, but does not raise an exception if the
+    directory already exists.
+    """
+    try:
+        return os.mkdir(*args, **kwargs)
+    except OSError as exc:
+        if exc.errno != errno.EEXIST:
+            raise
+
+
+def build(source_dir, dist, dest=None):
+    pyproject = os.path.join(source_dir, 'pyproject.toml')
+    dest = os.path.join(source_dir, dest or 'dist')
+    mkdir_p(dest)
+
+    with open(pyproject) as f:
+        pyproject_data = pytoml.load(f)
+    # Ensure the mandatory data can be loaded
+    buildsys = pyproject_data['build-system']
+    requires = buildsys['requires']
+    backend = buildsys['build-backend']
+
+    hooks = Pep517HookCaller(source_dir, backend)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        _do_build(hooks, env, dist, dest)
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'source_dir',
+    help="A directory containing pyproject.toml",
+)
+parser.add_argument(
+    '--binary', '-b',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--source', '-s',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--out-dir', '-o',
+    help="Destination in which to save the builds relative to source dir",
+)
+
+
+def main(args):
+    # determine which dists to build
+    dists = list(filter(None, (
+        'sdist' if args.source or not args.binary else None,
+        'wheel' if args.binary or not args.source else None,
+    )))
+
+    for dist in dists:
+        build(args.source_dir, dist, args.out_dir)
+
+
+if __name__ == '__main__':
+    main(parser.parse_args())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/check.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/check.py
new file mode 100644
index 00000000..f4cdc6be
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/check.py
@@ -0,0 +1,202 @@
+"""Check a project and backend by attempting to build using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+from os.path import isfile, join as pjoin
+from pip._vendor.pytoml import TomlError, load as toml_load
+import shutil
+from subprocess import CalledProcessError
+import sys
+import tarfile
+from tempfile import mkdtemp
+import zipfile
+
+from .colorlog import enable_colourful_output
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def check_build_sdist(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_sdist({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build sdist in %s', td)
+        try:
+            try:
+                filename = hooks.build_sdist(td, {})
+                log.info('build_sdist returned %r', filename)
+            except Exception:
+                log.info('Failure in build_sdist', exc_info=True)
+                return False
+
+            if not filename.endswith('.tar.gz'):
+                log.error(
+                    "Filename %s doesn't have .tar.gz extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if tarfile.is_tarfile(path):
+                log.info("Output file is a tar file")
+            else:
+                log.error("Output file is not a tar file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check_build_wheel(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_wheel({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build wheel in %s', td)
+        try:
+            try:
+                filename = hooks.build_wheel(td, {})
+                log.info('build_wheel returned %r', filename)
+            except Exception:
+                log.info('Failure in build_wheel', exc_info=True)
+                return False
+
+            if not filename.endswith('.whl'):
+                log.error("Filename %s doesn't have .whl extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if zipfile.is_zipfile(path):
+                log.info("Output file is a zip file")
+            else:
+                log.error("Output file is not a zip file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check(source_dir):
+    pyproject = pjoin(source_dir, 'pyproject.toml')
+    if isfile(pyproject):
+        log.info('Found pyproject.toml')
+    else:
+        log.error('Missing pyproject.toml')
+        return False
+
+    try:
+        with open(pyproject) as f:
+            pyproject_data = toml_load(f)
+        # Ensure the mandatory data can be loaded
+        buildsys = pyproject_data['build-system']
+        requires = buildsys['requires']
+        backend = buildsys['build-backend']
+        log.info('Loaded pyproject.toml')
+    except (TomlError, KeyError):
+        log.error("Invalid pyproject.toml", exc_info=True)
+        return False
+
+    hooks = Pep517HookCaller(source_dir, backend)
+
+    sdist_ok = check_build_sdist(hooks, requires)
+    wheel_ok = check_build_wheel(hooks, requires)
+
+    if not sdist_ok:
+        log.warning('Sdist checks failed; scroll up to see')
+    if not wheel_ok:
+        log.warning('Wheel checks failed')
+
+    return sdist_ok
+
+
+def main(argv=None):
+    ap = argparse.ArgumentParser()
+    ap.add_argument(
+        'source_dir',
+        help="A directory containing pyproject.toml")
+    args = ap.parse_args(argv)
+
+    enable_colourful_output()
+
+    ok = check(args.source_dir)
+
+    if ok:
+        print(ansi('Checks passed', 'green'))
+    else:
+        print(ansi('Checks failed', 'red'))
+        sys.exit(1)
+
+
+ansi_codes = {
+    'reset': '\x1b[0m',
+    'bold': '\x1b[1m',
+    'red': '\x1b[31m',
+    'green': '\x1b[32m',
+}
+
+
+def ansi(s, attr):
+    if os.name != 'nt' and sys.stdout.isatty():
+        return ansi_codes[attr] + str(s) + ansi_codes['reset']
+    else:
+        return str(s)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/colorlog.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/colorlog.py
new file mode 100644
index 00000000..69c8a59d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/colorlog.py
@@ -0,0 +1,115 @@
+"""Nicer log formatting with colours.
+
+Code copied from Tornado, Apache licensed.
+"""
+# Copyright 2012 Facebook
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import logging
+import sys
+
+try:
+    import curses
+except ImportError:
+    curses = None
+
+
+def _stderr_supports_color():
+    color = False
+    if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty():
+        try:
+            curses.setupterm()
+            if curses.tigetnum("colors") > 0:
+                color = True
+        except Exception:
+            pass
+    return color
+
+
+class LogFormatter(logging.Formatter):
+    """Log formatter with colour support
+    """
+    DEFAULT_COLORS = {
+        logging.INFO: 2,  # Green
+        logging.WARNING: 3,  # Yellow
+        logging.ERROR: 1,  # Red
+        logging.CRITICAL: 1,
+    }
+
+    def __init__(self, color=True, datefmt=None):
+        r"""
+        :arg bool color: Enables color support.
+        :arg string fmt: Log message format.
+        It will be applied to the attributes dict of log records. The
+        text between ``%(color)s`` and ``%(end_color)s`` will be colored
+        depending on the level if color support is on.
+        :arg dict colors: color mappings from logging level to terminal color
+        code
+        :arg string datefmt: Datetime format.
+        Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``.
+        .. versionchanged:: 3.2
+        Added ``fmt`` and ``datefmt`` arguments.
+        """
+        logging.Formatter.__init__(self, datefmt=datefmt)
+        self._colors = {}
+        if color and _stderr_supports_color():
+            # The curses module has some str/bytes confusion in
+            # python3. Until version 3.2.3, most methods return
+            # bytes, but only accept strings. In addition, we want to
+            # output these strings with the logging module, which
+            # works with unicode strings. The explicit calls to
+            # unicode() below are harmless in python2 but will do the
+            # right conversion in python 3.
+            fg_color = (curses.tigetstr("setaf") or
+                        curses.tigetstr("setf") or "")
+            if (3, 0) < sys.version_info < (3, 2, 3):
+                fg_color = str(fg_color, "ascii")
+
+            for levelno, code in self.DEFAULT_COLORS.items():
+                self._colors[levelno] = str(
+                    curses.tparm(fg_color, code), "ascii")
+            self._normal = str(curses.tigetstr("sgr0"), "ascii")
+
+            scr = curses.initscr()
+            self.termwidth = scr.getmaxyx()[1]
+            curses.endwin()
+        else:
+            self._normal = ''
+            # Default width is usually 80, but too wide is
+            # worse than too narrow
+            self.termwidth = 70
+
+    def formatMessage(self, record):
+        mlen = len(record.message)
+        right_text = '{initial}-{name}'.format(initial=record.levelname[0],
+                                               name=record.name)
+        if mlen + len(right_text) < self.termwidth:
+            space = ' ' * (self.termwidth - (mlen + len(right_text)))
+        else:
+            space = '  '
+
+        if record.levelno in self._colors:
+            start_color = self._colors[record.levelno]
+            end_color = self._normal
+        else:
+            start_color = end_color = ''
+
+        return record.message + space + start_color + right_text + end_color
+
+
+def enable_colourful_output(level=logging.INFO):
+    handler = logging.StreamHandler()
+    handler.setFormatter(LogFormatter())
+    logging.root.addHandler(handler)
+    logging.root.setLevel(level)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/compat.py
new file mode 100644
index 00000000..01c66fc7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/compat.py
@@ -0,0 +1,23 @@
+"""Handle reading and writing JSON in UTF-8, on Python 3 and 2."""
+import json
+import sys
+
+if sys.version_info[0] >= 3:
+    # Python 3
+    def write_json(obj, path, **kwargs):
+        with open(path, 'w', encoding='utf-8') as f:
+            json.dump(obj, f, **kwargs)
+
+    def read_json(path):
+        with open(path, 'r', encoding='utf-8') as f:
+            return json.load(f)
+
+else:
+    # Python 2
+    def write_json(obj, path, **kwargs):
+        with open(path, 'wb') as f:
+            json.dump(obj, f, encoding='utf-8', **kwargs)
+
+    def read_json(path):
+        with open(path, 'rb') as f:
+            return json.load(f)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/envbuild.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/envbuild.py
new file mode 100644
index 00000000..f7ac5f46
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/envbuild.py
@@ -0,0 +1,158 @@
+"""Build wheels/sdists by installing build deps to a temporary environment.
+"""
+
+import os
+import logging
+from pip._vendor import pytoml
+import shutil
+from subprocess import check_call
+import sys
+from sysconfig import get_paths
+from tempfile import mkdtemp
+
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def _load_pyproject(source_dir):
+    with open(os.path.join(source_dir, 'pyproject.toml')) as f:
+        pyproject_data = pytoml.load(f)
+    buildsys = pyproject_data['build-system']
+    return buildsys['requires'], buildsys['build-backend']
+
+
+class BuildEnvironment(object):
+    """Context manager to install build deps in a simple temporary environment
+
+    Based on code I wrote for pip, which is MIT licensed.
+    """
+    # Copyright (c) 2008-2016 The pip developers (see AUTHORS.txt file)
+    #
+    # Permission is hereby granted, free of charge, to any person obtaining
+    # a copy of this software and associated documentation files (the
+    # "Software"), to deal in the Software without restriction, including
+    # without limitation the rights to use, copy, modify, merge, publish,
+    # distribute, sublicense, and/or sell copies of the Software, and to
+    # permit persons to whom the Software is furnished to do so, subject to
+    # the following conditions:
+    #
+    # The above copyright notice and this permission notice shall be
+    # included in all copies or substantial portions of the Software.
+    #
+    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    path = None
+
+    def __init__(self, cleanup=True):
+        self._cleanup = cleanup
+
+    def __enter__(self):
+        self.path = mkdtemp(prefix='pep517-build-env-')
+        log.info('Temporary build environment: %s', self.path)
+
+        self.save_path = os.environ.get('PATH', None)
+        self.save_pythonpath = os.environ.get('PYTHONPATH', None)
+
+        install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
+        install_dirs = get_paths(install_scheme, vars={
+            'base': self.path,
+            'platbase': self.path,
+        })
+
+        scripts = install_dirs['scripts']
+        if self.save_path:
+            os.environ['PATH'] = scripts + os.pathsep + self.save_path
+        else:
+            os.environ['PATH'] = scripts + os.pathsep + os.defpath
+
+        if install_dirs['purelib'] == install_dirs['platlib']:
+            lib_dirs = install_dirs['purelib']
+        else:
+            lib_dirs = install_dirs['purelib'] + os.pathsep + \
+                install_dirs['platlib']
+        if self.save_pythonpath:
+            os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
+                self.save_pythonpath
+        else:
+            os.environ['PYTHONPATH'] = lib_dirs
+
+        return self
+
+    def pip_install(self, reqs):
+        """Install dependencies into this env by calling pip in a subprocess"""
+        if not reqs:
+            return
+        log.info('Calling pip to install %s', reqs)
+        check_call([
+            sys.executable, '-m', 'pip', 'install', '--ignore-installed',
+            '--prefix', self.path] + list(reqs))
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        needs_cleanup = (
+            self._cleanup and
+            self.path is not None and
+            os.path.isdir(self.path)
+        )
+        if needs_cleanup:
+            shutil.rmtree(self.path)
+
+        if self.save_path is None:
+            os.environ.pop('PATH', None)
+        else:
+            os.environ['PATH'] = self.save_path
+
+        if self.save_pythonpath is None:
+            os.environ.pop('PYTHONPATH', None)
+        else:
+            os.environ['PYTHONPATH'] = self.save_pythonpath
+
+
+def build_wheel(source_dir, wheel_dir, config_settings=None):
+    """Build a wheel from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str wheel_dir: Target directory to create wheel in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_wheel(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_wheel(wheel_dir, config_settings)
+
+
+def build_sdist(source_dir, sdist_dir, config_settings=None):
+    """Build an sdist from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str sdist_dir: Target directory to place sdist in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_sdist(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_sdist(sdist_dir, config_settings)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/wrappers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/wrappers.py
new file mode 100644
index 00000000..b14b8991
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pep517/wrappers.py
@@ -0,0 +1,163 @@
+from contextlib import contextmanager
+import os
+from os.path import dirname, abspath, join as pjoin
+import shutil
+from subprocess import check_call
+import sys
+from tempfile import mkdtemp
+
+from . import compat
+
+_in_proc_script = pjoin(dirname(abspath(__file__)), '_in_process.py')
+
+
+@contextmanager
+def tempdir():
+    td = mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+
+class BackendUnavailable(Exception):
+    """Will be raised if the backend cannot be imported in the hook process."""
+
+
+class UnsupportedOperation(Exception):
+    """May be raised by build_sdist if the backend indicates that it can't."""
+
+
+def default_subprocess_runner(cmd, cwd=None, extra_environ=None):
+    """The default method of calling the wrapper subprocess."""
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    check_call(cmd, cwd=cwd, env=env)
+
+
+class Pep517HookCaller(object):
+    """A wrapper around a source directory to be built with a PEP 517 backend.
+
+    source_dir : The path to the source directory, containing pyproject.toml.
+    backend : The build backend spec, as per PEP 517, from pyproject.toml.
+    """
+    def __init__(self, source_dir, build_backend):
+        self.source_dir = abspath(source_dir)
+        self.build_backend = build_backend
+        self._subprocess_runner = default_subprocess_runner
+
+    # TODO: Is this over-engineered? Maybe frontends only need to
+    #       set this when creating the wrapper, not on every call.
+    @contextmanager
+    def subprocess_runner(self, runner):
+        prev = self._subprocess_runner
+        self._subprocess_runner = runner
+        yield
+        self._subprocess_runner = prev
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.:
+            ["wheel >= 0.25", "setuptools"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_wheel', {
+            'config_settings': config_settings
+        })
+
+    def prepare_metadata_for_build_wheel(
+            self, metadata_directory, config_settings=None):
+        """Prepare a *.dist-info folder with metadata for this project.
+
+        Returns the name of the newly created folder.
+
+        If the build backend defines a hook with this name, it will be called
+        in a subprocess. If not, the backend will be asked to build a wheel,
+        and the dist-info extracted from that.
+        """
+        return self._call_hook('prepare_metadata_for_build_wheel', {
+            'metadata_directory': abspath(metadata_directory),
+            'config_settings': config_settings,
+        })
+
+    def build_wheel(
+            self, wheel_directory, config_settings=None,
+            metadata_directory=None):
+        """Build a wheel from this project.
+
+        Returns the name of the newly created file.
+
+        In general, this will call the 'build_wheel' hook in the backend.
+        However, if that was previously called by
+        'prepare_metadata_for_build_wheel', and the same metadata_directory is
+        used, the previously built wheel will be copied to wheel_directory.
+        """
+        if metadata_directory is not None:
+            metadata_directory = abspath(metadata_directory)
+        return self._call_hook('build_wheel', {
+            'wheel_directory': abspath(wheel_directory),
+            'config_settings': config_settings,
+            'metadata_directory': metadata_directory,
+        })
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.:
+            ["setuptools >= 26"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_sdist', {
+            'config_settings': config_settings
+        })
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        """Build an sdist from this project.
+
+        Returns the name of the newly created file.
+
+        This calls the 'build_sdist' backend hook in a subprocess.
+        """
+        return self._call_hook('build_sdist', {
+            'sdist_directory': abspath(sdist_directory),
+            'config_settings': config_settings,
+        })
+
+    def _call_hook(self, hook_name, kwargs):
+        # On Python 2, pytoml returns Unicode values (which is correct) but the
+        # environment passed to check_call needs to contain string values. We
+        # convert here by encoding using ASCII (the backend can only contain
+        # letters, digits and _, . and : characters, and will be used as a
+        # Python identifier, so non-ASCII content is wrong on Python 2 in
+        # any case).
+        if sys.version_info[0] == 2:
+            build_backend = self.build_backend.encode('ASCII')
+        else:
+            build_backend = self.build_backend
+
+        with tempdir() as td:
+            compat.write_json({'kwargs': kwargs}, pjoin(td, 'input.json'),
+                              indent=2)
+
+            # Run the hook in a subprocess
+            self._subprocess_runner(
+                [sys.executable, _in_proc_script, hook_name, td],
+                cwd=self.source_dir,
+                extra_environ={'PEP517_BUILD_BACKEND': build_backend}
+            )
+
+            data = compat.read_json(pjoin(td, 'output.json'))
+            if data.get('unsupported'):
+                raise UnsupportedOperation
+            if data.get('no_backend'):
+                raise BackendUnavailable
+            return data['return_val']
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py
new file mode 100644
index 00000000..fdd40de4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__init__.py
@@ -0,0 +1,3286 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pip._vendor import six
+from pip._vendor.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pip._vendor import appdirs
+from pip._vendor import packaging
+__import__('pip._vendor.packaging.version')
+__import__('pip._vendor.packaging.specifiers')
+__import__('pip._vendor.packaging.requirements')
+__import__('pip._vendor.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 4):
+    raise RuntimeError("Python 3.4 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = sys.version[:3]
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or appdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        value = self._get(self._fn(self.egg_info, name))
+        return value.decode('utf-8') if six.PY3 else value
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..ded754dc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-37.pyc
new file mode 100644
index 00000000..d351c239
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/py31compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/py31compat.py
new file mode 100644
index 00000000..a2d3007c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from pip._vendor import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__init__.py
new file mode 100644
index 00000000..e434c257
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__init__.py
@@ -0,0 +1,177 @@
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import division, print_function
+
+from collections import deque
+from datetime import timedelta
+from math import ceil
+from sys import stderr
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
+
+
+__version__ = '1.5'
+
+HIDE_CURSOR = '\x1b[?25l'
+SHOW_CURSOR = '\x1b[?25h'
+
+
+class Infinite(object):
+    file = stderr
+    sma_window = 10         # Simple Moving Average window
+    check_tty = True
+    hide_cursor = True
+
+    def __init__(self, message='', **kwargs):
+        self.index = 0
+        self.start_ts = monotonic()
+        self.avg = 0
+        self._avg_update_ts = self.start_ts
+        self._ts = self.start_ts
+        self._xput = deque(maxlen=self.sma_window)
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+        self._width = 0
+        self.message = message
+
+        if self.file and self.is_tty():
+            if self.hide_cursor:
+                print(HIDE_CURSOR, end='', file=self.file)
+            print(self.message, end='', file=self.file)
+            self.file.flush()
+
+    def __getitem__(self, key):
+        if key.startswith('_'):
+            return None
+        return getattr(self, key, None)
+
+    @property
+    def elapsed(self):
+        return int(monotonic() - self.start_ts)
+
+    @property
+    def elapsed_td(self):
+        return timedelta(seconds=self.elapsed)
+
+    def update_avg(self, n, dt):
+        if n > 0:
+            xput_len = len(self._xput)
+            self._xput.append(dt / n)
+            now = monotonic()
+            # update when we're still filling _xput, then after every second
+            if (xput_len < self.sma_window or
+                    now - self._avg_update_ts > 1):
+                self.avg = sum(self._xput) / len(self._xput)
+                self._avg_update_ts = now
+
+    def update(self):
+        pass
+
+    def start(self):
+        pass
+
+    def clearln(self):
+        if self.file and self.is_tty():
+            print('\r\x1b[K', end='', file=self.file)
+
+    def write(self, s):
+        if self.file and self.is_tty():
+            line = self.message + s.ljust(self._width)
+            print('\r' + line, end='', file=self.file)
+            self._width = max(self._width, len(s))
+            self.file.flush()
+
+    def writeln(self, line):
+        if self.file and self.is_tty():
+            self.clearln()
+            print(line, end='', file=self.file)
+            self.file.flush()
+
+    def finish(self):
+        if self.file and self.is_tty():
+            print(file=self.file)
+            if self.hide_cursor:
+                print(SHOW_CURSOR, end='', file=self.file)
+
+    def is_tty(self):
+        return self.file.isatty() if self.check_tty else True
+
+    def next(self, n=1):
+        now = monotonic()
+        dt = now - self._ts
+        self.update_avg(n, dt)
+        self._ts = now
+        self.index = self.index + n
+        self.update()
+
+    def iter(self, it):
+        with self:
+            for x in it:
+                yield x
+                self.next()
+
+    def __enter__(self):
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.finish()
+
+
+class Progress(Infinite):
+    def __init__(self, *args, **kwargs):
+        super(Progress, self).__init__(*args, **kwargs)
+        self.max = kwargs.get('max', 100)
+
+    @property
+    def eta(self):
+        return int(ceil(self.avg * self.remaining))
+
+    @property
+    def eta_td(self):
+        return timedelta(seconds=self.eta)
+
+    @property
+    def percent(self):
+        return self.progress * 100
+
+    @property
+    def progress(self):
+        return min(1, self.index / self.max)
+
+    @property
+    def remaining(self):
+        return max(self.max - self.index, 0)
+
+    def start(self):
+        self.update()
+
+    def goto(self, index):
+        incr = index - self.index
+        self.next(incr)
+
+    def iter(self, it):
+        try:
+            self.max = len(it)
+        except TypeError:
+            pass
+
+        with self:
+            for x in it:
+                yield x
+                self.next()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..3b449b22
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/bar.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/bar.cpython-37.pyc
new file mode 100644
index 00000000..b30d33ff
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/bar.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/counter.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/counter.cpython-37.pyc
new file mode 100644
index 00000000..2b67d351
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/counter.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/spinner.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/spinner.cpython-37.pyc
new file mode 100644
index 00000000..9cd44f0c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/__pycache__/spinner.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/bar.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/bar.py
new file mode 100644
index 00000000..8819efda
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/bar.py
@@ -0,0 +1,91 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+
+import sys
+
+from . import Progress
+
+
+class Bar(Progress):
+    width = 32
+    suffix = '%(index)d/%(max)d'
+    bar_prefix = ' |'
+    bar_suffix = '| '
+    empty_fill = ' '
+    fill = '#'
+
+    def update(self):
+        filled_length = int(self.width * self.progress)
+        empty_length = self.width - filled_length
+
+        message = self.message % self
+        bar = self.fill * filled_length
+        empty = self.empty_fill * empty_length
+        suffix = self.suffix % self
+        line = ''.join([message, self.bar_prefix, bar, empty, self.bar_suffix,
+                        suffix])
+        self.writeln(line)
+
+
+class ChargingBar(Bar):
+    suffix = '%(percent)d%%'
+    bar_prefix = ' '
+    bar_suffix = ' '
+    empty_fill = '∙'
+    fill = '█'
+
+
+class FillingSquaresBar(ChargingBar):
+    empty_fill = '▢'
+    fill = '▣'
+
+
+class FillingCirclesBar(ChargingBar):
+    empty_fill = '◯'
+    fill = '◉'
+
+
+class IncrementalBar(Bar):
+    if sys.platform.startswith('win'):
+        phases = (u' ', u'▌', u'█')
+    else:
+        phases = (' ', '▏', '▎', '▍', '▌', '▋', '▊', '▉', '█')
+
+    def update(self):
+        nphases = len(self.phases)
+        filled_len = self.width * self.progress
+        nfull = int(filled_len)                      # Number of full chars
+        phase = int((filled_len - nfull) * nphases)  # Phase of last char
+        nempty = self.width - nfull                  # Number of empty chars
+
+        message = self.message % self
+        bar = self.phases[-1] * nfull
+        current = self.phases[phase] if phase > 0 else ''
+        empty = self.empty_fill * max(0, nempty - len(current))
+        suffix = self.suffix % self
+        line = ''.join([message, self.bar_prefix, bar, current, empty,
+                        self.bar_suffix, suffix])
+        self.writeln(line)
+
+
+class PixelBar(IncrementalBar):
+    phases = ('⡀', '⡄', '⡆', '⡇', '⣇', '⣧', '⣷', '⣿')
+
+
+class ShadyBar(IncrementalBar):
+    phases = (' ', '░', '▒', '▓', '█')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/counter.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/counter.py
new file mode 100644
index 00000000..d955ca47
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/counter.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+from . import Infinite, Progress
+
+
+class Counter(Infinite):
+    def update(self):
+        self.write(str(self.index))
+
+
+class Countdown(Progress):
+    def update(self):
+        self.write(str(self.remaining))
+
+
+class Stack(Progress):
+    phases = (' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█')
+
+    def update(self):
+        nphases = len(self.phases)
+        i = min(nphases - 1, int(self.progress * nphases))
+        self.write(self.phases[i])
+
+
+class Pie(Stack):
+    phases = ('○', '◔', '◑', '◕', '●')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/spinner.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/spinner.py
new file mode 100644
index 00000000..4e100cab
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/progress/spinner.py
@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+from . import Infinite
+
+
+class Spinner(Infinite):
+    phases = ('-', '\\', '|', '/')
+    hide_cursor = True
+
+    def update(self):
+        i = self.index % len(self.phases)
+        self.write(self.phases[i])
+
+
+class PieSpinner(Spinner):
+    phases = ['◷', '◶', '◵', '◴']
+
+
+class MoonSpinner(Spinner):
+    phases = ['◑', '◒', '◐', '◓']
+
+
+class LineSpinner(Spinner):
+    phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻']
+
+
+class PixelSpinner(Spinner):
+    phases = ['⣾', '⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pyparsing.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pyparsing.py
new file mode 100644
index 00000000..9d6a01d5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pyparsing.py
@@ -0,0 +1,6493 @@
+#-*- coding: utf-8 -*-
+# module pyparsing.py
+#
+# Copyright (c) 2003-2019  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and
+executing simple grammars, vs. the traditional lex/yacc approach, or the
+use of regular expressions.  With pyparsing, you don't need to learn
+a new syntax for defining grammars or matching expressions - the parsing
+module provides a library of classes that you use to construct the
+grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form
+``"<salutation>, <addressee>!"``), built up using :class:`Word`,
+:class:`Literal`, and :class:`And` elements
+(the :class:`'+'<ParserElement.__add__>` operators create :class:`And` expressions,
+and the strings are auto-converted to :class:`Literal` expressions)::
+
+    from pip._vendor.pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the
+self-explanatory class names, and the use of '+', '|' and '^' operators.
+
+The :class:`ParseResults` object returned from
+:class:`ParserElement.parseString` can be
+accessed as a nested list, a dictionary, or an object with named
+attributes.
+
+The pyparsing module handles some of the problems that are typically
+vexing when writing text parsers:
+
+  - extra or missing whitespace (the above program will also handle
+    "Hello,World!", "Hello  ,  World  !", etc.)
+  - quoted strings
+  - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes :class:`ParserElement` and :class:`ParseResults` to
+see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+
+ - construct literal match expressions from :class:`Literal` and
+   :class:`CaselessLiteral` classes
+ - construct character word-group expressions using the :class:`Word`
+   class
+ - see how to create repetitive expressions using :class:`ZeroOrMore`
+   and :class:`OneOrMore` classes
+ - use :class:`'+'<And>`, :class:`'|'<MatchFirst>`, :class:`'^'<Or>`,
+   and :class:`'&'<Each>` operators to combine simple expressions into
+   more complex ones
+ - associate names with your parsed results using
+   :class:`ParserElement.setResultsName`
+ - find some helpful expression short-cuts like :class:`delimitedList`
+   and :class:`oneOf`
+ - find more useful common expressions in the :class:`pyparsing_common`
+   namespace class
+"""
+
+__version__ = "2.4.0"
+__versionTime__ = "07 Apr 2019 18:28 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+
+try:
+    # Python 3
+    from itertools import filterfalse
+except ImportError:
+    from itertools import ifilterfalse as filterfalse
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+try:
+    from types import SimpleNamespace
+except ImportError:
+    class SimpleNamespace: pass
+
+# version compatibility configuration
+__compat__ = SimpleNamespace()
+__compat__.__doc__ = """
+    A cross-version compatibility configuration for pyparsing features that will be 
+    released in a future version. By setting values in this configuration to True, 
+    those features can be enabled in prior versions for compatibility development 
+    and testing.
+    
+     - collect_all_And_tokens - flag to enable fix for Issue #63 that fixes erroneous grouping
+       of results names when an And expression is nested within an Or or MatchFirst; set to 
+       True to enable bugfix to be released in pyparsing 2.4
+"""
+__compat__.collect_all_And_tokens = True
+
+
+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
+
+__all__ = [ '__version__', '__versionTime__', '__author__', '__compat__',
+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+'PrecededBy', 'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter',
+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore', 'Char',
+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity',
+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
+'CloseMatch', 'tokenMap', 'pyparsing_common', 'pyparsing_unicode', 'unicode_set',
+]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    unicode = str
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode
+        friendly. It first tries str(obj). If that fails with
+        a UnicodeEncodeError, then it tries unicode(obj). It then
+        < returns the unicode object | encodes it with the default
+        encoding | ... >.
+        """
+        if isinstance(obj,unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__,fname))
+        except AttributeError:
+            continue
+
+_generatorType = type((y for y in range(1)))
+
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
+    for from_,to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+alphas     = string.ascii_uppercase + string.ascii_lowercase
+nums       = "0123456789"
+hexnums    = nums + "ABCDEFabcdef"
+alphanums  = alphas + nums
+_bslash    = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, pstr, loc=0, msg=None, elem=None ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__( self, aname ):
+        """supported attributes by name are:
+           - lineno - returns the line number of the exception text
+           - col - returns the column number of the exception text
+           - line - returns the line containing the exception text
+        """
+        if( aname == "lineno" ):
+            return lineno( self.loc, self.pstr )
+        elif( aname in ("col", "column") ):
+            return col( self.loc, self.pstr )
+        elif( aname == "line" ):
+            return line( self.loc, self.pstr )
+        else:
+            raise AttributeError(aname)
+
+    def __str__( self ):
+        return "%s (at char %d), (line:%d, col:%d)" % \
+                ( self.msg, self.loc, self.lineno, self.column )
+    def __repr__( self ):
+        return _ustr(self)
+    def markInputline( self, markerString = ">!<" ):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+    - lineno - returns the line number of the exception text
+    - col - returns the column number of the exception text
+    - line - returns the line containing the exception text
+
+    Example::
+
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+
+    prints::
+
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+
+    """
+
+    @staticmethod
+    def explain(exc, depth=16):
+        """
+        Method to take an exception and translate the Python internal traceback into a list
+        of the pyparsing expressions that caused the exception to be raised.
+
+        Parameters:
+
+         - exc - exception raised during parsing (need not be a ParseException, in support
+           of Python exceptions that might be raised in a parse action)
+         - depth (default=16) - number of levels back in the stack trace to list expression
+           and function names; if None, the full stack trace names will be listed; if 0, only
+           the failing input line, marker, and exception string will be shown
+
+        Returns a multi-line string listing the ParserElements and/or function names in the
+        exception's stack trace.
+
+        Note: the diagnostic output will include string representations of the expressions
+        that failed to parse. These representations will be more helpful if you use `setName` to
+        give identifiable names to your expressions. Otherwise they will use the default string
+        forms, which may be cryptic to read.
+
+        explain() is only supported under Python 3.
+        """
+        import inspect
+
+        if depth is None:
+            depth = sys.getrecursionlimit()
+        ret = []
+        if isinstance(exc, ParseBaseException):
+            ret.append(exc.line)
+            ret.append(' ' * (exc.col - 1) + '^')
+        ret.append("{0}: {1}".format(type(exc).__name__, exc))
+
+        if depth > 0:
+            callers = inspect.getinnerframes(exc.__traceback__, context=depth)
+            seen = set()
+            for i, ff in enumerate(callers[-depth:]):
+                frm = ff[0]
+
+                f_self = frm.f_locals.get('self', None)
+                if isinstance(f_self, ParserElement):
+                    if frm.f_code.co_name not in ('parseImpl', '_parseNoCache'):
+                        continue
+                    if f_self in seen:
+                        continue
+                    seen.add(f_self)
+
+                    self_type = type(f_self)
+                    ret.append("{0}.{1} - {2}".format(self_type.__module__,
+                                                      self_type.__name__,
+                                                      f_self))
+                elif f_self is not None:
+                    self_type = type(f_self)
+                    ret.append("{0}.{1}".format(self_type.__module__,
+                                                self_type.__name__))
+                else:
+                    code = frm.f_code
+                    if code.co_name in ('wrapper', '<module>'):
+                        continue
+
+                    ret.append("{0}".format(code.co_name))
+
+                depth -= 1
+                if not depth:
+                    break
+
+        return '\n'.join(ret)
+
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like :class:`ParseFatalException`, but thrown internally
+    when an :class:`ErrorStop<And._ErrorStop>` ('-' operator) indicates
+    that parsing is to stop immediately because an unbacktrackable
+    syntax error has been found.
+    """
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by :class:`ParserElement.validate` if the
+    grammar could be improperly recursive
+    """
+    def __init__( self, parseElementList ):
+        self.parseElementTrace = parseElementList
+
+    def __str__( self ):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self,p1,p2):
+        self.tup = (p1,p2)
+    def __getitem__(self,i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self,i):
+        self.tup = (self.tup[0],i)
+
+class ParseResults(object):
+    """Structured parse results, to provide multiple means of access to
+    the parsed data:
+
+       - as a list (``len(results)``)
+       - by list index (``results[0], results[1]``, etc.)
+       - by attribute (``results.<resultsName>`` - see :class:`ParserElement.setResultsName`)
+
+    Example::
+
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/'
+                        + integer.setResultsName("month") + '/'
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+
+    prints::
+
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name,int):
+                name = _ustr(name) # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
+                if isinstance(toklist,basestring):
+                    toklist = [ toklist ]
+                if asList:
+                    if isinstance(toklist,ParseResults):
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist.__toklist), 0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError,TypeError,IndexError):
+                        self[name] = toklist
+
+    def __getitem__( self, i ):
+        if isinstance( i, (int,slice) ):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[i] ])
+
+    def __setitem__( self, k, v, isinstance=isinstance ):
+        if isinstance(v,_ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
+            sub = v[0]
+        elif isinstance(k,(int,slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
+            sub = v
+        if isinstance(sub,ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__( self, i ):
+        if isinstance(i,(int,slice)):
+            mylen = len( self.__toklist )
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i+1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name,occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__( self, k ):
+        return k in self.__tokdict
+
+    def __len__( self ): return len( self.__toklist )
+    def __bool__(self): return ( not not self.__toklist )
+    __nonzero__ = __bool__
+    def __iter__( self ): return iter( self.__toklist )
+    def __reversed__( self ): return iter( self.__toklist[::-1] )
+    def _iterkeys( self ):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues( self ):
+        return (self[k] for k in self._iterkeys())
+
+    def _iteritems( self ):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys
+        """Returns an iterator of all named result keys."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys( self ):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values( self ):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+
+        def items( self ):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys( self ):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+
+    def pop( self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default= ``last``).
+        Supports both ``list`` and ``dict`` semantics for ``pop()``. If
+        passed no argument or an integer argument, it will use ``list``
+        semantics and pop tokens from the list of parsed tokens. If passed
+        a non-integer argument (most likely a string), it will use ``dict``
+        semantics and pop the corresponding value from any defined results
+        names. A second default return value argument is supported, just as in
+        ``dict.pop()``.
+
+        Example::
+
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+
+        prints::
+
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k,v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int) or
+                        len(args) == 1 or
+                        args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given ``defaultValue`` or ``None`` if no
+        ``defaultValue`` is specified.
+
+        Similar to ``dict.get()``.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert( self, index, insStr ):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+
+        Similar to ``list.insert()``.
+
+        Example::
+
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name,occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append( self, item ):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend( self, itemseq ):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self.__iadd__(itemseq)
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear( self ):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__( self, name ):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+
+        if name in self.__tokdict:
+            if name not in self.__accumNames:
+                return self.__tokdict[name][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[name] ])
+        else:
+            return ""
+
+    def __add__( self, other ):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__( self, other ):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a<0 else a+offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
+                                for (k,vlist) in otheritems for v in vlist]
+            for k,v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0],ParseResults):
+                    v[0].__parent = wkref(self)
+
+        self.__toklist += other.__toklist
+        self.__accumNames.update( other.__accumNames )
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other,int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+
+    def __repr__( self ):
+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
+
+    def __str__( self ):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList( self, sep='' ):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance( item, ParseResults ):
+                out += item._asStringList()
+            else:
+                out.append( _ustr(item) )
+        return out
+
+    def asList( self ):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
+
+    def asDict( self ):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+
+        return dict((k,toItem(v)) for k,v in item_fn())
+
+    def copy( self ):
+        """
+        Returns a new copy of a :class:`ParseResults` object.
+        """
+        ret = ParseResults( self.__toklist )
+        ret.__tokdict = dict(self.__tokdict.items())
+        ret.__parent = self.__parent
+        ret.__accumNames.update( self.__accumNames )
+        ret.__name = self.__name
+        return ret
+
+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
+                                                            for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [ nl, indent, "<", selfTag, ">" ]
+
+        for i,res in enumerate(self.__toklist):
+            if isinstance(res,ParseResults):
+                if i in namedItems:
+                    out += [ res.asXML(namedItems[i],
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+                else:
+                    out += [ res.asXML(None,
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [ nl, nextLevelIndent, "<", resTag, ">",
+                                                xmlBodyText,
+                                                "</", resTag, ">" ]
+
+        out += [ nl, indent, "</", selfTag, ">" ]
+        return "".join(out)
+
+    def __lookup(self,sub):
+        for k,vlist in self.__tokdict.items():
+            for v,loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several
+        different expressions might match at a particular location.
+
+        Example::
+
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number")
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+
+        prints::
+
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1 and
+               len(self.__tokdict) == 1 and
+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', depth=0, full=True):
+        """
+        Diagnostic method for listing out the contents of
+        a :class:`ParseResults`. Accepts an optional ``indent`` argument so
+        that this string can be embedded in a nested display of other data.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+
+        prints::
+
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        out.append( indent+_ustr(self.asList()) )
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k,v in self.items())
+                for k,v in items:
+                    if out:
+                        out.append(NL)
+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
+                    if isinstance(v,ParseResults):
+                        if v:
+                            out.append( v.dump(indent,depth+1) )
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv,ParseResults) for vv in self):
+                v = self
+                for i,vv in enumerate(v):
+                    if isinstance(vv,ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
+
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the
+        `pprint <https://docs.python.org/3/library/pprint.html>`_ module.
+        Accepts additional positional or keyword args as defined for
+        `pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
+
+        Example::
+
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+
+        prints::
+
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return ( self.__toklist,
+                 ( self.__tokdict.copy(),
+                   self.__parent is not None and self.__parent() or None,
+                   self.__accumNames,
+                   self.__name ) )
+
+    def __setstate__(self,state):
+        self.__toklist = state[0]
+        (self.__tokdict,
+         par,
+         inAccumNames,
+         self.__name) = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return (dir(type(self)) + list(self.keys()))
+
+MutableMapping.register(ParseResults)
+
+def col (loc,strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See
+   :class:`ParserElement.parseString` for more
+   information on parsing strings containing ``<TAB>`` s, and suggested
+   methods to maintain a consistent view of the parsed string, the parse
+   location, and line and column positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc,strg):
+    """Returns current line number within a string, counting newlines as line separators.
+    The first line is number 1.
+
+    Note - the default parsing behavior is to expand tabs in the input string
+    before starting the parsing process.  See :class:`ParserElement.parseString`
+    for more information on parsing strings containing ``<TAB>`` s, and
+    suggested methods to maintain a consistent view of the parsed string, the
+    parse location, and line and column positions within the parsed string.
+    """
+    return strg.count("\n",0,loc) + 1
+
+def line( loc, strg ):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR+1:nextCR]
+    else:
+        return strg[lastCR+1:]
+
+def _defaultStartDebugAction( instring, loc, expr ):
+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
+
+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction( instring, loc, expr, exc ):
+    print ("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s,l,t: func(t)
+    limit = [0]
+    foundArity = [False]
+
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3,5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3,5,0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+
+    # synthesize what would be returned by traceback.extract_stack at the call to
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        del tb
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__',
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars( chars ):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+
+        Example::
+
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    def __init__( self, savelist=False ):
+        self.parseAction = list()
+        self.failAction = None
+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS)
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = ( None, None, None ) #custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy( self ):
+        """
+        Make a copy of this :class:`ParserElement`.  Useful for defining
+        different parse actions for the same parsing pattern, using copies of
+        the original parse element.
+
+        Example::
+
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+
+        prints::
+
+            [5120, 100, 655360, 268435456]
+
+        Equivalent form of ``expr.copy()`` is just ``expr()``::
+
+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+        """
+        cpy = copy.copy( self )
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName( self, name ):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+
+        Example::
+
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if hasattr(self,"exception"):
+            self.exception.msg = self.errmsg
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original :class:`ParserElement` object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        ``expr("name")`` in place of ``expr.setResultsName("name")``
+        - see :class:`__call__`.
+
+        Example::
+
+            date_str = (integer.setResultsName("year") + '/'
+                        + integer.setResultsName("month") + '/'
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches=True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self,breakFlag = True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set ``breakFlag`` to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                pdb.set_trace()
+                return _parseMethod( instring, loc, doActions, callPreParse )
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse,"_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction( self, *fns, **kwargs ):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as ``fn(s,loc,toks)`` ,
+        ``fn(loc,toks)`` , ``fn(toks)`` , or just ``fn()`` , where:
+
+        - s   = the original string being parsed (see note below)
+        - loc = the location of the matching substring
+        - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object
+
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        Optional keyword arguments:
+        - callDuringTry = (default= ``False`` ) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See :class:`parseString for more
+        information on parsing strings containing ``<TAB>`` s, and suggested
+        methods to maintain a consistent view of the parsed string, the parse
+        location, and line and column positions within the parsed string.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        self.parseAction = list(map(_trim_arity, list(fns)))
+        self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction( self, *fns, **kwargs ):
+        """
+        Add one or more parse actions to expression's list of parse actions. See :class:`setParseAction`.
+
+        See examples in :class:`copy`.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See
+        :class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
+        functions passed to ``addCondition`` need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+        - message = define a custom message to be used in the raised exception
+        - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+
+        Example::
+
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        msg = kwargs.get("message", "failed user-defined condition")
+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
+        for fn in fns:
+            fn = _trim_arity(fn)
+            def pa(s,l,t):
+                if not bool(fn(s,l,t)):
+                    raise exc_type(s,l,msg)
+            self.parseAction.append(pa)
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction( self, fn ):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           ``fn(s,loc,expr,err)`` where:
+           - s = string being parsed
+           - loc = location where expression match was attempted and failed
+           - expr = the parse expression that failed
+           - err = the exception thrown
+           The function returns no value.  It may throw :class:`ParseFatalException`
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables( self, instring, loc ):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc,dummy = e._parse( instring, loc )
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse( self, instring, loc ):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables( instring, loc )
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        return loc, []
+
+    def postParse( self, instring, loc, tokenlist ):
+        return tokenlist
+
+    #~ @profile
+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
+        debugging = ( self.debug ) #and doActions )
+
+        if debugging or self.failAction:
+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
+            if (self.debugActions[0] ):
+                self.debugActions[0]( instring, loc, self )
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            try:
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            except ParseBaseException as err:
+                #~ print ("Exception raised:", err)
+                if self.debugActions[2]:
+                    self.debugActions[2]( instring, tokensStart, self, err )
+                if self.failAction:
+                    self.failAction( instring, tokensStart, self, err )
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            else:
+                loc,tokens = self.parseImpl( instring, preloc, doActions )
+
+        tokens = self.postParse( instring, loc, tokens )
+
+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        try:
+                            tokens = fn( instring, tokensStart, retTokens )
+                        except IndexError as parse_action_exc:
+                            exc = ParseException("exception raised in parse action")
+                            exc.__cause__ = parse_action_exc
+                            raise exc
+
+                        if tokens is not None and tokens is not retTokens:
+                            retTokens = ParseResults( tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                      modal=self.modalResults )
+                except ParseBaseException as err:
+                    #~ print "Exception raised in user parse action:", err
+                    if (self.debugActions[2] ):
+                        self.debugActions[2]( instring, tokensStart, self, err )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    try:
+                        tokens = fn( instring, tokensStart, retTokens )
+                    except IndexError as parse_action_exc:
+                        exc = ParseException("exception raised in parse action")
+                        exc.__cause__ = parse_action_exc
+                        raise exc
+
+                    if tokens is not None and tokens is not retTokens:
+                        retTokens = ParseResults( tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                  modal=self.modalResults )
+        if debugging:
+            #~ print ("Matched",self,"->",retTokens.asList())
+            if (self.debugActions[1] ):
+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
+
+        return loc, retTokens
+
+    def tryParse( self, instring, loc ):
+        try:
+            return self._parse( instring, loc, doActions=False )[0]
+        except ParseFatalException:
+            raise ParseException( instring, loc, self.errmsg, self)
+
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return (value[0], value[1].copy())
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+
+           Parameters:
+
+           - cache_size_limit - (default= ``128``) - if an integer value is provided
+             will limit the size of the packrat cache; if None is passed, then
+             the cache size will be unbounded; if 0 is passed, the cache will
+             be effectively disabled.
+
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method :class:`ParserElement.enablePackrat`.
+           For best results, call ``enablePackrat()`` immediately after
+           importing pyparsing.
+
+           Example::
+
+               from pip._vendor import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString( self, instring, parseAll=False ):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set ``parseAll`` to True (equivalent to ending
+        the grammar with ``StringEnd()``).
+
+        Note: ``parseString`` implicitly calls ``expandtabs()`` on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the ``loc`` argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+
+        - calling ``parseWithTabs`` on your grammar before calling ``parseString``
+          (see :class:`parseWithTabs`)
+        - define your parse action using the full ``(s,loc,toks)`` signature, and
+          reference the input string using the parse action's ``s`` argument
+        - explictly expand the tabs in your input string before calling
+          ``parseString``
+
+        Example::
+
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            #~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse( instring, 0 )
+            if parseAll:
+                loc = self.preParse( instring, loc )
+                se = Empty() + StringEnd()
+                se._parse( instring, loc )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+        else:
+            return tokens
+
+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        ``maxMatches`` argument, to clip scanning after 'n' matches are found.  If
+        ``overlap`` is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See :class:`parseString` for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens,start,end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+
+        prints::
+
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn( instring, loc )
+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+                except ParseException:
+                    loc = preloc+1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn( instring, loc )
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc+1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def transformString( self, instring ):
+        """
+        Extension to :class:`scanString`, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use ``transformString``, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking ``transformString()`` on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  ``transformString()`` returns the resulting transformed string.
+
+        Example::
+
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+
+        prints::
+
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t,s,e in self.scanString( instring ):
+                out.append( instring[lastE:s] )
+                if t:
+                    if isinstance(t,ParseResults):
+                        out += t.asList()
+                    elif isinstance(t,list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr,_flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def searchString( self, instring, maxMatches=_MAX_INT ):
+        """
+        Another extension to :class:`scanString`, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        ``maxMatches`` argument, to clip searching after 'n' matches are found.
+
+        Example::
+
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+
+        prints::
+
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional ``maxsplit`` argument, to limit the number of splits;
+        and the optional ``includeSeparators`` argument (default= ``False``), if the separating
+        matching text should be included in the split results.
+
+        Example::
+
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+
+        prints::
+
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other ):
+        """
+        Implementation of + operator - returns :class:`And`. Adding strings to a ParserElement
+        converts them to :class:`Literal`s by default.
+
+        Example::
+
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+
+        prints::
+
+            Hello, World! -> ['Hello', ',', 'World', '!']
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return And( [ self, other ] )
+
+    def __radd__(self, other ):
+        """
+        Implementation of + operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns :class:`And` with error stop
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other ):
+        """
+        Implementation of - operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self,other):
+        """
+        Implementation of * operator, allows use of ``expr * 3`` in place of
+        ``expr + expr + expr``.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to ``{min,max}`` multipliers in regular expressions.  Tuples
+        may also include ``None`` as in:
+         - ``expr*(n,None)`` or ``expr*(n,)`` is equivalent
+              to ``expr*n + ZeroOrMore(expr)``
+              (read as "at least n instances of ``expr``")
+         - ``expr*(None,n)`` is equivalent to ``expr*(0,n)``
+              (read as "0 to n instances of ``expr``")
+         - ``expr*(None,None)`` is equivalent to ``ZeroOrMore(expr)``
+         - ``expr*(1,None)`` is equivalent to ``OneOrMore(expr)``
+
+        Note that ``expr*(None,n)`` does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        ``expr*(None,n)`` does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        ``expr*(None,n) + ~expr``
+        """
+        if isinstance(other,int):
+            minElements, optElements = other,0
+        elif isinstance(other,tuple):
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0],int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self*other[0] + ZeroOrMore(self)
+            elif isinstance(other[0],int) and isinstance(other[1],int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
+
+        if (optElements):
+            def makeOptionalList(n):
+                if n>1:
+                    return Optional(self + makeOptionalList(n-1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self]*minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self]*minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other ):
+        """
+        Implementation of | operator - returns :class:`MatchFirst`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst( [ self, other ] )
+
+    def __ror__(self, other ):
+        """
+        Implementation of | operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other ):
+        """
+        Implementation of ^ operator - returns :class:`Or`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Or( [ self, other ] )
+
+    def __rxor__(self, other ):
+        """
+        Implementation of ^ operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other ):
+        """
+        Implementation of & operator - returns :class:`Each`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Each( [ self, other ] )
+
+    def __rand__(self, other ):
+        """
+        Implementation of & operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__( self ):
+        """
+        Implementation of ~ operator - returns :class:`NotAny`
+        """
+        return NotAny( self )
+
+    def __call__(self, name=None):
+        """
+        Shortcut for :class:`setResultsName`, with ``listAllMatches=False``.
+
+        If ``name`` is given with a trailing ``'*'`` character, then ``listAllMatches`` will be
+        passed as ``True``.
+
+        If ``name` is omitted, same as calling :class:`copy`.
+
+        Example::
+
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")
+        """
+        if name is not None:
+            return self.setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress( self ):
+        """
+        Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress( self )
+
+    def leaveWhitespace( self ):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        :class:`ParserElement`'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars( self, chars ):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs( self ):
+        """
+        Overrides default behavior to expand ``<TAB>``s to spaces before parsing the input string.
+        Must be called before ``parseString`` when the input grammar contains elements that
+        match ``<TAB>`` characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore( self, other ):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append( Suppress( other.copy() ) )
+        return self
+
+    def setDebugActions( self, startAction, successAction, exceptionAction ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug( self, flag=True ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set ``flag`` to True to enable, False to disable.
+
+        Example::
+
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+
+        prints::
+
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using :class:`setDebugActions`. Prior to attempting
+        to match the ``wd`` expression, the debugging message ``"Match <exprname> at loc <n>(<line>,<col>)"``
+        is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"``
+        message is shown. Also note the use of :class:`setName` to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the :class:`Word` expression without calling ``setName`` is ``"W:(ABCD...)"``.
+        """
+        if flag:
+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
+        else:
+            self.debug = False
+        return self
+
+    def __str__( self ):
+        return self.name
+
+    def __repr__( self ):
+        return _ustr(self)
+
+    def streamline( self ):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        pass
+
+    def validate( self, validateTrace=[] ):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion( [] )
+
+    def parseFile( self, file_or_filename, parseAll=False ):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def __eq__(self,other):
+        if isinstance(other, ParserElement):
+            return self is other or vars(self) == vars(other)
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        else:
+            return super(ParserElement,self)==other
+
+    def __ne__(self,other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(id(self))
+
+    def __req__(self,other):
+        return self == other
+
+    def __rne__(self,other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple
+        inline microtests of sub expressions while building up larger parser.
+
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
+
+        Example::
+
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+
+    def runTests(self, tests, parseAll=True, comment='#',
+                 fullDump=True, printResults=True, failureTests=False, postParse=None):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
+         - comment - (default= ``'#'``) - expression for indicating embedded comments in the test
+              string; pass None to disable comment filtering
+         - fullDump - (default= ``True``) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default= ``True``) prints test output to stdout
+         - failureTests - (default= ``False``) indicates if these tests are expected to fail parsing
+         - postParse - (default= ``None``) optional callback for successful parse results; called as
+              `fn(test_string, parse_results)` and returns a string to be added to the test output
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if ``failureTests`` is True), and the results contain a list of lines of each
+        test's output
+
+        Example::
+
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+
+        prints::
+
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        allResults = []
+        comments = []
+        success = True
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n'.join(comments), t]
+            comments = []
+            try:
+                # convert newline marks to actual newlines, and strip leading BOM if present
+                NL = Literal(r'\n').addParseAction(replaceWith('\n')).ignore(quotedString)
+                BOM = '\ufeff'
+                t = NL.transformString(t.lstrip(BOM))
+                result = self.parseString(t, parseAll=parseAll)
+                out.append(result.dump(full=fullDump))
+                success = success and not failureTests
+                if postParse is not None:
+                    try:
+                        pp_value = postParse(t, result)
+                        if pp_value is not None:
+                            out.append(str(pp_value))
+                    except Exception as e:
+                        out.append("{0} failed: {1}: {2}".format(postParse.__name__, type(e).__name__, e))
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
+                else:
+                    out.append(' '*pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print('\n'.join(out))
+
+            allResults.append((t, result))
+
+        return success, allResults
+
+
+class Token(ParserElement):
+    """Abstract :class:`ParserElement` subclass, for defining atomic
+    matching patterns.
+    """
+    def __init__( self ):
+        super(Token,self).__init__( savelist=False )
+
+
+class Empty(Token):
+    """An empty token, will always match.
+    """
+    def __init__( self ):
+        super(Empty,self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """A token that will never match.
+    """
+    def __init__( self ):
+        super(NoMatch,self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """Token to exactly match a specified string.
+
+    Example::
+
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+
+    For case-insensitive matching, use :class:`CaselessLiteral`.
+
+    For keyword matching (force word break before and after the matched string),
+    use :class:`Keyword` or :class:`CaselessKeyword`.
+    """
+    def __init__( self, matchString ):
+        super(Literal,self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+    # Performance tuning: this routine gets called a *lot*
+    # if this is a single character match string  and the first character matches,
+    # short-circuit as quickly as possible, and avoid calling startswith
+    #~ @profile
+    def parseImpl( self, instring, loc, doActions=True ):
+        if (instring[loc] == self.firstMatchChar and
+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """Token to exactly match a specified string as a keyword, that is,
+    it must be immediately followed by a non-keyword character.  Compare
+    with :class:`Literal`:
+
+     - ``Literal("if")`` will match the leading ``'if'`` in
+       ``'ifAndOnlyIf'``.
+     - ``Keyword("if")`` will not; it will only match the leading
+       ``'if'`` in ``'if x=1'``, or ``'if(y==2)'``
+
+    Accepts two optional constructor arguments in addition to the
+    keyword string:
+
+     - ``identChars`` is a string of characters that would be valid
+       identifier characters, defaulting to all alphanumerics + "_" and
+       "$"
+     - ``caseless`` allows case-insensitive matching, default is ``False``.
+
+    Example::
+
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use :class:`CaselessKeyword`.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
+
+    def __init__( self, matchString, identChars=None, caseless=False ):
+        super(Keyword,self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.caseless:
+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        else:
+            if (instring[loc] == self.firstMatchChar and
+                (self.matchLen==1 or instring.startswith(self.match,loc)) and
+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
+                (loc == 0 or instring[loc-1] not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword,self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars( chars ):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessKeyword`.)
+    """
+    def __init__( self, matchString ):
+        super(CaselessLiteral,self).__init__( matchString.upper() )
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[ loc:loc+self.matchLen ].upper() == self.match:
+            return loc+self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of :class:`Keyword`.
+
+    Example::
+
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessLiteral`.)
+    """
+    def __init__( self, matchString, identChars=None ):
+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
+
+class CloseMatch(Token):
+    """A variation on :class:`Literal` which matches "close" matches,
+    that is, strings with at most 'n' mismatching characters.
+    :class:`CloseMatch` takes parameters:
+
+     - ``match_string`` - string to be matched
+     - ``maxMismatches`` - (``default=1``) maximum number of
+       mismatches allowed to count as a match
+
+    The results from a successful parse will contain the matched text
+    from the input string and the following named results:
+
+     - ``mismatches`` - a list of the positions within the
+       match_string where mismatches were found
+     - ``original`` - the original match_string used to compare
+       against the input string
+
+    If ``mismatches`` is an empty list, then the match was an exact
+    match.
+
+    Example::
+
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch,self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
+                src,mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = self.match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters, an
+    optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for ``min`` is
+    1 (a minimum value < 1 is not valid); the default values for
+    ``max`` and ``exact`` are 0, meaning no maximum or exact
+    length restriction. An optional ``excludeChars`` parameter can
+    list characters that might be found in the input ``bodyChars``
+    string; useful to define a word of all printables except for one or
+    two characters, for instance.
+
+    :class:`srange` is useful for defining custom character set strings
+    for defining ``Word`` expressions, using range notation from
+    regular expression character sets.
+
+    A common mistake is to use :class:`Word` to match a specific literal
+    string, as in ``Word("Address")``. Remember that :class:`Word`
+    uses the string argument to define *sets* of matchable characters.
+    This expression would match "Add", "AAA", "dAred", or any other word
+    made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an
+    exact literal string, use :class:`Literal` or :class:`Keyword`.
+
+    pyparsing includes helper strings for building Words:
+
+     - :class:`alphas`
+     - :class:`nums`
+     - :class:`alphanums`
+     - :class:`hexnums`
+     - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255
+       - accented, tilded, umlauted, etc.)
+     - :class:`punc8bit` (non-alphabetic characters in ASCII range
+       128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - :class:`printables` (any non-whitespace character)
+
+    Example::
+
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums+'-')
+
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
+        super(Word,self).__init__()
+        if excludeChars:
+            excludeChars = set(excludeChars)
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars :
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % \
+                                      (re.escape(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % \
+                                      (_escapeRegexRangeChars(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b"+self.reString+r"\b"
+            try:
+                self.re = re.compile( self.reString )
+            except Exception:
+                self.re = None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.re:
+            result = self.re.match(instring,loc)
+            if not result:
+                raise ParseException(instring, loc, self.errmsg, self)
+
+            loc = result.end()
+            return loc, result.group()
+
+        if instring[loc] not in self.initChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, instrlen )
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        elif self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        elif self.asKeyword:
+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(Word,self).__str__()
+        except Exception:
+            pass
+
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s)>4:
+                    return s[:4]+"..."
+                else:
+                    return s
+
+            if ( self.initCharsOrig != self.bodyCharsOrig ):
+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+
+class Char(Word):
+    """A short-cut class for defining ``Word(characters, exact=1)``,
+    when defining a match of any single character in a string of
+    characters.
+    """
+    def __init__(self, charset, asKeyword=False, excludeChars=None):
+        super(Char, self).__init__(charset, exact=1, asKeyword=asKeyword, excludeChars=excludeChars)
+        self.reString = "[%s]" % _escapeRegexRangeChars(self.initCharsOrig)
+        self.re = re.compile( self.reString )
+
+
+class Regex(Token):
+    r"""Token for matching strings that match a given regular
+    expression. Defined with string specifying the regular expression in
+    a form recognized by the stdlib Python  `re module <https://docs.python.org/3/library/re.html>`_.
+    If the given regex contains named groups (defined using ``(?P<name>...)``),
+    these will be preserved as named parse results.
+
+    Example::
+
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+    """
+    compiledREtype = type(re.compile("[A-Z]"))
+    def __init__( self, pattern, flags=0, asGroupList=False, asMatch=False):
+        """The parameters ``pattern`` and ``flags`` are passed
+        to the ``re.compile()`` function as-is. See the Python
+        `re module <https://docs.python.org/3/library/re.html>`_ module for an
+        explanation of the acceptable patterns and flags.
+        """
+        super(Regex,self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                        SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                    SyntaxWarning, stacklevel=2)
+                raise
+
+        elif isinstance(pattern, Regex.compiledREtype):
+            self.re = pattern
+            self.pattern = \
+            self.reString = str(pattern)
+            self.flags = flags
+
+        else:
+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+        self.asGroupList = asGroupList
+        self.asMatch = asMatch
+        if self.asGroupList:
+            self.parseImpl = self.parseImplAsGroupList
+        if self.asMatch:
+            self.parseImpl = self.parseImplAsMatch
+
+    def parseImpl(self, instring, loc, doActions=True):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = ParseResults(result.group())
+        d = result.groupdict()
+        if d:
+            for k, v in d.items():
+                ret[k] = v
+        return loc, ret
+
+    def parseImplAsGroupList(self, instring, loc, doActions=True):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.groups()
+        return loc, ret
+
+    def parseImplAsMatch(self, instring, loc, doActions=True):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(Regex,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+    def sub(self, repl):
+        r"""
+        Return Regex with an attached parse action to transform the parsed
+        result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
+
+        Example::
+
+            make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
+            print(make_html.transformString("h1:main title:"))
+            # prints "<h1>main title</h1>"
+        """
+        if self.asGroupList:
+            warnings.warn("cannot use sub() with Regex(asGroupList=True)",
+                           SyntaxWarning, stacklevel=2)
+            raise SyntaxError()
+
+        if self.asMatch and callable(repl):
+            warnings.warn("cannot use sub() with a callable with Regex(asMatch=True)",
+                           SyntaxWarning, stacklevel=2)
+            raise SyntaxError()
+
+        if self.asMatch:
+            def pa(tokens):
+                return tokens[0].expand(repl)
+        else:
+            def pa(tokens):
+                return self.re.sub(repl, tokens[0])
+        return self.addParseAction(pa)
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+
+    Defined with the following parameters:
+
+        - quoteChar - string of one or more characters defining the
+          quote delimiting string
+        - escChar - character to escape quotes, typically backslash
+          (default= ``None`` )
+        - escQuote - special quote sequence to escape an embedded quote
+          string (such as SQL's ``""`` to escape an embedded ``"``)
+          (default= ``None`` )
+        - multiline - boolean indicating whether quotes can span
+          multiple lines (default= ``False`` )
+        - unquoteResults - boolean indicating whether the matched text
+          should be unquoted (default= ``True`` )
+        - endQuoteChar - string of one or more characters defining the
+          end of the quote delimited string (default= ``None``  => same as
+          quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace
+          (``'\t'``, ``'\n'``, etc.) to actual whitespace
+          (default= ``True`` )
+
+    Example::
+
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+
+    prints::
+
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString,self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
+                )
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
+
+            if isinstance(ret,basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t' : '\t',
+                        r'\n' : '\n',
+                        r'\f' : '\f',
+                        r'\r' : '\r',
+                    }
+                    for wslit,wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(QuotedString,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """Token for matching words composed of characters *not* in a given
+    set (will include whitespace in matched characters if not listed in
+    the provided exclusion set - see example). Defined with string
+    containing all disallowed characters, and an optional minimum,
+    maximum, and/or exact length.  The default value for ``min`` is
+    1 (a minimum value < 1 is not valid); the default values for
+    ``max`` and ``exact`` are 0, meaning no maximum or exact
+    length restriction.
+
+    Example::
+
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+
+    prints::
+
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__( self, notChars, min=1, max=0, exact=0 ):
+        super(CharsNotIn,self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError(
+                "cannot specify a minimum length < 1; use " +
+                "Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = ( self.minLen == 0 )
+        self.mayIndexError = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min( start+self.maxLen, len(instring) )
+        while loc < maxlen and \
+              (instring[loc] not in notchars):
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """Special matching class for matching whitespace.  Normally,
+    whitespace is ignored by pyparsing grammars.  This class is included
+    when some whitespace structures are significant.  Define with
+    a string containing the whitespace characters to be matched; default
+    is ``" \\t\\r\\n"``.  Also takes optional ``min``,
+    ``max``, and ``exact`` arguments, as defined for the
+    :class:`Word` class.
+    """
+    whiteStrs = {
+        ' ' : '<SP>',
+        '\t': '<TAB>',
+        '\n': '<LF>',
+        '\r': '<CR>',
+        '\f': '<FF>',
+        'u\00A0': '<NBSP>',
+        'u\1680': '<OGHAM_SPACE_MARK>',
+        'u\180E': '<MONGOLIAN_VOWEL_SEPARATOR>',
+        'u\2000': '<EN_QUAD>',
+        'u\2001': '<EM_QUAD>',
+        'u\2002': '<EN_SPACE>',
+        'u\2003': '<EM_SPACE>',
+        'u\2004': '<THREE-PER-EM_SPACE>',
+        'u\2005': '<FOUR-PER-EM_SPACE>',
+        'u\2006': '<SIX-PER-EM_SPACE>',
+        'u\2007': '<FIGURE_SPACE>',
+        'u\2008': '<PUNCTUATION_SPACE>',
+        'u\2009': '<THIN_SPACE>',
+        'u\200A': '<HAIR_SPACE>',
+        'u\200B': '<ZERO_WIDTH_SPACE>',
+        'u\202F': '<NNBSP>',
+        'u\205F': '<MMSP>',
+        'u\3000': '<IDEOGRAPHIC_SPACE>',
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White,self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
+        #~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] not in self.matchWhite:
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, len(instring) )
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__( self ):
+        super(_PositionToken,self).__init__()
+        self.name=self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """Token to advance to a specific column of input text; useful for
+    tabular report scraping.
+    """
+    def __init__( self, colno ):
+        super(GoToColumn,self).__init__()
+        self.col = colno
+
+    def preParse( self, instring, loc ):
+        if col(loc,instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables( instring, loc )
+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
+                loc += 1
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        thiscol = col( loc, instring )
+        if thiscol > self.col:
+            raise ParseException( instring, loc, "Text not in expected column", self )
+        newloc = loc + self.col - thiscol
+        ret = instring[ loc: newloc ]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    r"""Matches if current position is at the beginning of a line within
+    the parse string
+
+    Example::
+
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+
+    prints::
+
+        ['AAA', ' this line']
+        ['AAA', ' and this line']
+
+    """
+    def __init__( self ):
+        super(LineStart,self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """Matches if current position is at the end of a line within the
+    parse string
+    """
+    def __init__( self ):
+        super(LineEnd,self).__init__()
+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
+        self.errmsg = "Expected end of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc<len(instring):
+            if instring[loc] == "\n":
+                return loc+1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """Matches if current position is at the beginning of the parse
+    string
+    """
+    def __init__( self ):
+        super(StringStart,self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse( instring, 0 ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """Matches if current position is at the end of the parse string
+    """
+    def __init__( self ):
+        super(StringEnd,self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """Matches if the current position is at the beginning of a Word,
+    and is not preceded by any character in a given set of
+    ``wordChars`` (default= ``printables``). To emulate the
+    ``\b`` behavior of regular expressions, use
+    ``WordStart(alphanums)``. ``WordStart`` will also match at
+    the beginning of the string being parsed, or at the beginning of
+    a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordStart,self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        if loc != 0:
+            if (instring[loc-1] in self.wordChars or
+                instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """Matches if the current position is at the end of a Word, and is
+    not followed by any character in a given set of ``wordChars``
+    (default= ``printables``). To emulate the ``\b`` behavior of
+    regular expressions, use ``WordEnd(alphanums)``. ``WordEnd``
+    will also match at the end of the string being parsed, or at the end
+    of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordEnd,self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        instrlen = len(instring)
+        if instrlen>0 and loc<instrlen:
+            if (instring[loc] in self.wordChars or
+                instring[loc-1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """Abstract subclass of ParserElement, for combining and
+    post-processing parsed tokens.
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(ParseExpression,self).__init__(savelist)
+        if isinstance( exprs, _generatorType ):
+            exprs = list(exprs)
+
+        if isinstance( exprs, basestring ):
+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
+        elif isinstance( exprs, Iterable ):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if all(isinstance(expr, basestring) for expr in exprs):
+                exprs = map(ParserElement._literalStringClass, exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list( exprs )
+            except TypeError:
+                self.exprs = [ exprs ]
+        self.callPreparse = False
+
+    def __getitem__( self, i ):
+        return self.exprs[i]
+
+    def append( self, other ):
+        self.exprs.append( other )
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace( self ):
+        """Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [ e.copy() for e in self.exprs ]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseExpression, self).ignore( other )
+                for e in self.exprs:
+                    e.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseExpression, self).ignore( other )
+            for e in self.exprs:
+                e.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def __str__( self ):
+        try:
+            return super(ParseExpression,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
+        return self.strRepr
+
+    def streamline( self ):
+        super(ParseExpression,self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if ( len(self.exprs) == 2 ):
+            other = self.exprs[0]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = other.exprs[:] + [ self.exprs[1] ]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+
+        return self
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion( [] )
+
+    def copy(self):
+        ret = super(ParseExpression,self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+class And(ParseExpression):
+    """
+    Requires all given :class:`ParseExpression` s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the ``'+'`` operator.
+    May also be constructed using the ``'-'`` operator, which will
+    suppress backtracking.
+
+    Example::
+
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"),name_expr("name"),integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop,self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__( self, exprs, savelist = True ):
+        super(And,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars( self.exprs[0].whiteChars )
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def streamline(self):
+        super(And, self).streamline()
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        return self
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse( instring, loc, doActions )
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse( instring, loc, doActions )
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #And( [ self, other ] )
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    two expressions match, the expression that matches the longest
+    string will be used. May be constructed using the ``'^'``
+    operator.
+
+    Example::
+
+        # construct Or using '^' operator
+
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+
+    prints::
+
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(Or,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self):
+        super(Or, self).streamline()
+        if __compat__.collect_all_And_tokens:
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+        return self
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse( instring, loc )
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            matches.sort(key=lambda x: -x[0])
+            for _,e in matches:
+                try:
+                    return e._parse( instring, loc, doActions )
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #Or( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class MatchFirst(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    two expressions match, the first one listed is the one that will
+    match. May be constructed using the ``'|'`` operator.
+
+    Example::
+
+        # construct MatchFirst using '|' operator
+
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(MatchFirst,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self):
+        super(MatchFirst, self).streamline()
+        if __compat__.collect_all_And_tokens:
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+        return self
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse( instring, loc, doActions )
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #MatchFirst( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class Each(ParseExpression):
+    """Requires all given :class:`ParseExpression` s to be found, but in
+    any order. Expressions may be separated by whitespace.
+
+    May be constructed using the ``'&'`` operator.
+
+    Example::
+
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+
+    prints::
+
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__( self, exprs, savelist = True ):
+        super(Each,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+        self.saveAsList = True
+
+    def streamline(self):
+        super(Each, self).streamline()
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        return self
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse( instring, tmpLoc )
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e),e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc,results = e._parse(instring,loc,doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class ParseElementEnhance(ParserElement):
+    """Abstract subclass of :class:`ParserElement`, for combining and
+    post-processing parsed tokens.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(ParseElementEnhance,self).__init__(savelist)
+        if isinstance( expr, basestring ):
+            if issubclass(ParserElement._literalStringClass, Token):
+                expr = ParserElement._literalStringClass(expr)
+            else:
+                expr = ParserElement._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars( expr.whiteChars )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr is not None:
+            return self.expr._parse( instring, loc, doActions, callPreParse=False )
+        else:
+            raise ParseException("",loc,self.errmsg,self)
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseElementEnhance, self).ignore( other )
+                if self.expr is not None:
+                    self.expr.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseElementEnhance, self).ignore( other )
+            if self.expr is not None:
+                self.expr.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def streamline( self ):
+        super(ParseElementEnhance,self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        if self in parseElementList:
+            raise RecursiveGrammarException( parseElementList+[self] )
+        subRecCheckList = parseElementList[:] + [ self ]
+        if self.expr is not None:
+            self.expr.checkRecursion( subRecCheckList )
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion( [] )
+
+    def __str__( self ):
+        try:
+            return super(ParseElementEnhance,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """Lookahead matching of the given parse expression.
+    ``FollowedBy`` does *not* advance the parsing position within
+    the input string, it only verifies that the specified parse
+    expression matches at the current position.  ``FollowedBy``
+    always returns a null token list. If any results names are defined
+    in the lookahead expression, those *will* be returned for access by
+    name.
+
+    Example::
+
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+
+    prints::
+
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__( self, expr ):
+        super(FollowedBy,self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        _, ret = self.expr._parse(instring, loc, doActions=doActions)
+        del ret[:]
+        return loc, ret
+
+
+class PrecededBy(ParseElementEnhance):
+    """Lookbehind matching of the given parse expression.
+    ``PrecededBy`` does not advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    matches prior to the current position.  ``PrecededBy`` always
+    returns a null token list, but if a results name is defined on the
+    given expression, it is returned.
+
+    Parameters:
+
+     - expr - expression that must match prior to the current parse
+       location
+     - retreat - (default= ``None``) - (int) maximum number of characters
+       to lookbehind prior to the current parse location
+
+    If the lookbehind expression is a string, Literal, Keyword, or
+    a Word or CharsNotIn with a specified exact or maximum length, then
+    the retreat parameter is not required. Otherwise, retreat must be
+    specified to give a maximum number of characters to look back from
+    the current parse position for a lookbehind match.
+
+    Example::
+
+        # VB-style variable names with type prefixes
+        int_var = PrecededBy("#") + pyparsing_common.identifier
+        str_var = PrecededBy("$") + pyparsing_common.identifier
+
+    """
+    def __init__(self, expr, retreat=None):
+        super(PrecededBy, self).__init__(expr)
+        self.expr = self.expr().leaveWhitespace()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.exact = False
+        if isinstance(expr, str):
+            retreat = len(expr)
+            self.exact = True
+        elif isinstance(expr, (Literal, Keyword)):
+            retreat = expr.matchLen
+            self.exact = True
+        elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT:
+            retreat = expr.maxLen
+            self.exact = True
+        elif isinstance(expr, _PositionToken):
+            retreat = 0
+            self.exact = True
+        self.retreat = retreat
+        self.errmsg = "not preceded by " + str(expr)
+        self.skipWhitespace = False
+
+    def parseImpl(self, instring, loc=0, doActions=True):
+        if self.exact:
+            if loc < self.retreat:
+                raise ParseException(instring, loc, self.errmsg)
+            start = loc - self.retreat
+            _, ret = self.expr._parse(instring, start)
+        else:
+            # retreat specified a maximum lookbehind window, iterate
+            test_expr = self.expr + StringEnd()
+            instring_slice = instring[:loc]
+            last_expr = ParseException(instring, loc, self.errmsg)
+            for offset in range(1, min(loc, self.retreat+1)):
+                try:
+                    _, ret = test_expr._parse(instring_slice, loc-offset)
+                except ParseBaseException as pbe:
+                    last_expr = pbe
+                else:
+                    break
+            else:
+                raise last_expr
+        # return empty list of tokens, but preserve any defined results names
+        del ret[:]
+        return loc, ret
+
+
+class NotAny(ParseElementEnhance):
+    """Lookahead to disallow matching with the given parse expression.
+    ``NotAny`` does *not* advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    does *not* match at the current position.  Also, ``NotAny`` does
+    *not* skip over leading whitespace. ``NotAny`` always returns
+    a null token list.  May be constructed using the '~' operator.
+
+    Example::
+
+        AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split())
+
+        # take care not to mistake keywords for identifiers
+        ident = ~(AND | OR | NOT) + Word(alphas)
+        boolean_term = Optional(NOT) + ident
+
+        # very crude boolean expression - to support parenthesis groups and
+        # operation hierarchy, use infixNotation
+        boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term)
+
+        # integers that are followed by "." are actually floats
+        integer = Word(nums) + ~Char(".")
+    """
+    def __init__( self, expr ):
+        super(NotAny,self).__init__(expr)
+        #~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__( self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = ParserElement._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables( instring, loc )
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException,IndexError):
+            pass
+
+        return loc, tokens
+
+class OneOrMore(_MultipleMatch):
+    """Repetition of one or more of the given expression.
+
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default= ``None``) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition
+          expression)
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """Optional repetition of zero or more of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default= ``None``) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition
+          expression)
+
+    Example: similar to :class:`OneOrMore`
+    """
+    def __init__( self, expr, stopOn=None):
+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException,IndexError):
+            return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+_optionalNotMatched = _NullToken()
+class Optional(ParseElementEnhance):
+    """Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+
+            # ZIP+4 form
+            12101-0001
+
+            # invalid ZIP
+            98765-
+            ''')
+
+    prints::
+
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    def __init__( self, expr, default=_optionalNotMatched ):
+        super(Optional,self).__init__( expr, savelist=False )
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
+        except (ParseException,IndexError):
+            if self.defaultValue is not _optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([ self.defaultValue ])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [ self.defaultValue ]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """Token for skipping over all undefined text until the matched
+    expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default= ``False``) if True, the target expression is also parsed
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default= ``None``) used to define grammars (typically quoted strings and
+          comments) that might contain false matches to the target expression
+     - failOn - (default= ``None``) define expressions that are not allowed to be
+          included in the skipped test; if found before the target expression is found,
+          the SkipTo is not a match
+
+    Example::
+
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP
+                      + string_data("sev") + SEP
+                      + string_data("desc") + SEP
+                      + integer("days_open"))
+
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+
+    prints::
+
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__( self, other, include=False, ignore=None, failOn=None ):
+        super( SkipTo, self ).__init__( other )
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.saveAsList = False
+        if isinstance(failOn, basestring):
+            self.failOn = ParserElement._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+
+        if self.includeMatch:
+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the ``Forward``
+    variable using the '<<' operator.
+
+    Note: take care when assigning to ``Forward`` not to overlook
+    precedence of operators.
+
+    Specifically, '|' has a lower precedence than '<<', so that::
+
+        fwdExpr << a | b | c
+
+    will actually be evaluated as::
+
+        (fwdExpr << a) | b | c
+
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the ``Forward``::
+
+        fwdExpr << (a | b | c)
+
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See :class:`ParseResults.pprint` for an example of a recursive
+    parser created using ``Forward``.
+    """
+    def __init__( self, other=None ):
+        super(Forward,self).__init__( other, savelist=False )
+
+    def __lshift__( self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars( self.expr.whiteChars )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+
+    def __ilshift__(self, other):
+        return self << other
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        return self
+
+    def streamline( self ):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate( self, validateTrace=[] ):
+        if self not in validateTrace:
+            tmp = validateTrace[:]+[self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        # Avoid infinite recursion by setting a temporary name
+        self.name = self.__class__.__name__ + ": ..."
+
+        # Use the string representation of main expression.
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)
+            else:
+                retString = "None"
+        finally:
+            del self.name
+        return self.__class__.__name__ + ": " + retString
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward,self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of :class:`ParseExpression`, for converting parsed results.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(TokenConverter,self).__init__( expr )#, savelist )
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the
+    input string; this can be disabled by specifying
+    ``'adjacent=False'`` in the constructor.
+
+    Example::
+
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__( self, expr, joinString="", adjacent=True ):
+        super(Combine,self).__init__( expr )
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore( self, other ):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super( Combine, self).ignore( other )
+        return self
+
+    def postParse( self, instring, loc, tokenlist ):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [ retToks ]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """Converter to return the matched tokens as a list - useful for
+    returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions.
+
+    Example::
+
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__( self, expr ):
+        super(Group,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        return [ tokenlist ]
+
+class Dict(TokenConverter):
+    """Converter to return a repetitive expression as a list, but also
+    as a dictionary. Each element can also be referenced using the first
+    token in the expression as its key. Useful for tabular report
+    scraping when the first column can be used as a item key.
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])
+        print(result.asDict())
+
+    prints::
+
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+
+    See more examples at :class:`ParseResults` of accessing fields by results name.
+    """
+    def __init__( self, expr ):
+        super(Dict,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        for i,tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey,int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok)==1:
+                tokenlist[ikey] = _ParseResultsWithOffset("",i)
+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
+            else:
+                dictvalue = tok.copy() #ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
+
+        if self.resultsName:
+            return [ tokenlist ]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """Converter for ignoring the results of a parsed expression.
+
+    Example::
+
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+
+    prints::
+
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+
+    (See also :class:`delimitedList`.)
+    """
+    def postParse( self, instring, loc, tokenlist ):
+        return []
+
+    def suppress( self ):
+        return self
+
+
+class OnlyOnce(object):
+    """Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self,s,l,t):
+        if not self.called:
+            results = self.callable(s,l,t)
+            self.called = True
+            return results
+        raise ParseException(s,l,"")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """Decorator for debugging parse actions.
+
+    When the parse action is called, this decorator will print
+    ``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
+    When the parse action completes, the decorator will print
+    ``"<<"`` followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+
+    prints::
+
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s,l,t = paArgs[-3:]
+        if len(paArgs)>3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
+            raise
+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList( expr, delim=",", combine=False ):
+    """Helper to define a delimited list of expressions - the delimiter
+    defaults to ','. By default, the list elements and delimiters can
+    have intervening whitespace, and comments, but this can be
+    overridden by passing ``combine=True`` in the constructor. If
+    ``combine`` is set to ``True``, the matching tokens are
+    returned as a single token string, with the delimiters included;
+    otherwise, the matching tokens are returned as a list of tokens,
+    with the delimiters suppressed.
+
+    Example::
+
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
+    if combine:
+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
+    else:
+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
+
+def countedArray( expr, intExpr=None ):
+    """Helper to define a counted list of expressions.
+
+    This helper defines a pattern of the form::
+
+        integer expr expr expr...
+
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the
+    leading count token is suppressed.
+
+    If ``intExpr`` is specified, it should be a pyparsing expression
+    that produces an integer value.
+
+    Example::
+
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s,l,t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i,list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches a previous literal, will also match the leading
+    ``"1:1"`` in ``"1:10"``. If this is not desired, use
+    :class:`matchPreviousExpr`. Do *not* use with packrat parsing
+    enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s,l,t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches by expressions, will *not* match the leading ``"1:1"``
+    in ``"1:10"``; the expressions are evaluated first, and then
+    compared, so ``"1"`` is compared with ``"10"``. Do *not* use
+    with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s,l,t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s,l,t):
+            theseTokens = _flatten(t.asList())
+            if  theseTokens != matchTokens:
+                raise ParseException("",0,"")
+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    #~  escape these chars: ^-]
+    for c in r"\^-]":
+        s = s.replace(c,_bslash+c)
+    s = s.replace("\n",r"\n")
+    s = s.replace("\t",r"\t")
+    return _ustr(s)
+
+def oneOf( strs, caseless=False, useRegex=True ):
+    """Helper to quickly define a set of alternative Literals, and makes
+    sure to do longest-first testing when there is a conflict,
+    regardless of the input order, but returns
+    a :class:`MatchFirst` for best performance.
+
+    Parameters:
+
+     - strs - a string of space-delimited literals, or a collection of
+       string literals
+     - caseless - (default= ``False``) - treat all literals as
+       caseless
+     - useRegex - (default= ``True``) - as an optimization, will
+       generate a Regex object; otherwise, will generate
+       a :class:`MatchFirst` object (if ``caseless=True``, or if
+       creating a :class:`Regex` raises an exception)
+
+    Example::
+
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+
+    prints::
+
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if caseless:
+        isequal = ( lambda a,b: a.upper() == b.upper() )
+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
+        parseElementClass = CaselessLiteral
+    else:
+        isequal = ( lambda a,b: a == b )
+        masks = ( lambda a,b: b.startswith(a) )
+        parseElementClass = Literal
+
+    symbols = []
+    if isinstance(strs,basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    i = 0
+    while i < len(symbols)-1:
+        cur = symbols[i]
+        for j,other in enumerate(symbols[i+1:]):
+            if ( isequal(other, cur) ):
+                del symbols[i+j+1]
+                break
+            elif ( masks(cur, other) ):
+                del symbols[i+j+1]
+                symbols.insert(i,other)
+                cur = other
+                break
+        else:
+            i += 1
+
+    if not caseless and useRegex:
+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
+        try:
+            if len(symbols)==len("".join(symbols)):
+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
+            else:
+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf( key, value ):
+    """Helper to easily and clearly define a dictionary by specifying
+    the respective patterns for the key and value.  Takes care of
+    defining the :class:`Dict`, :class:`ZeroOrMore`, and
+    :class:`Group` tokens in the proper order.  The key pattern
+    can include delimiting markers or punctuation, as long as they are
+    suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the :class:`Dict` results
+    can include named token fields.
+
+    Example::
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+
+    prints::
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict(OneOrMore(Group(key + value)))
+
+def originalTextFor(expr, asString=True):
+    """Helper to return the original, untokenized text for a given
+    expression.  Useful to restore the parsed fields of an HTML start
+    tag into the raw tag text itself, or to revert separate tokens with
+    intervening whitespace back to the original matching input text. By
+    default, returns astring containing the original parsed text.
+
+    If the optional ``asString`` argument is passed as
+    ``False``, then the return value is
+    a :class:`ParseResults` containing any results names that
+    were originally matched, and a single token containing the original
+    matched text from the input string.  So if the expression passed to
+    :class:`originalTextFor` contains expressions with defined
+    results names, you must set ``asString`` to ``False`` if you
+    want to preserve those results name values.
+
+    Example::
+
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b","i"):
+            opener,closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+
+    prints::
+
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s,l,t: s[t._original_start:t._original_end]
+    else:
+        def extractText(s,l,t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr):
+    """Helper to undo pyparsing's default grouping of And expressions,
+    even if all but one are non-empty.
+    """
+    return TokenConverter(expr).addParseAction(lambda t:t[0])
+
+def locatedExpr(expr):
+    """Helper to decorate a returned token with its starting and ending
+    locations in the input string.
+
+    This helper adds the following results names:
+
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains ``<TAB>`` characters, you
+    may want to call :class:`ParserElement.parseWithTabs`
+
+    Example::
+
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+
+    prints::
+
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s,l,t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
+
+def srange(s):
+    r"""Helper to easily define string ranges for use in Word
+    construction. Borrows syntax from regexp '[]' string range
+    definitions::
+
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+
+    The input string must be enclosed in []'s, and the returned string
+    is the expanded character set joined into a single string. The
+    values enclosed in the []'s may be:
+
+     - a single character
+     - an escaped character with a leading backslash (such as ``\-``
+       or ``\]``)
+     - an escaped hex character with a leading ``'\x'``
+       (``\x21``, which is a ``'!'`` character) (``\0x##``
+       is also supported for backwards compatibility)
+     - an escaped octal character with a leading ``'\0'``
+       (``\041``, which is a ``'!'`` character)
+     - a range of any of the above, separated by a dash (``'a-z'``,
+       etc.)
+     - any combination of the above (``'aeiouy'``,
+       ``'a-zA-Z0-9_$'``, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """Helper method for defining parse actions that require matching at
+    a specific column in the input text.
+    """
+    def verifyCol(strg,locn,toks):
+        if col(locn,strg) != n:
+            raise ParseException(strg,locn,"matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """Helper method for common parse actions that simply return
+    a literal value.  Especially useful when used with
+    :class:`transformString<ParserElement.transformString>` ().
+
+    Example::
+
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s,l,t: [replStr]
+
+def removeQuotes(s,l,t):
+    """Helper parse action for removing quotation marks from parsed
+    quoted strings.
+
+    Example::
+
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """Helper to define a parse action by mapping a function to all
+    elements of a ParseResults list. If any additional args are passed,
+    they are forwarded to the given function as additional arguments
+    after the token, as in
+    ``hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))``,
+    which will convert the parsed data to an integer using base 16.
+
+    Example (compare the last to example in :class:`ParserElement.transformString`::
+
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+
+    prints::
+
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s,l,t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__',
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case.
+Deprecated in favor of :class:`pyparsing_common.upcaseTokens`"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case.
+Deprecated in favor of :class:`pyparsing_common.downcaseTokens`"""
+
+def _makeTags(tagStr, xml,
+              suppress_LT=Suppress("<"),
+              suppress_GT=Suppress(">")):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr,basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas,alphanums+"_-:")
+    if (xml):
+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
+        openTag = (suppress_LT
+                   + tagStr("tag")
+                   + Dict(ZeroOrMore(Group(tagAttrName + Suppress("=") + tagAttrValue )))
+                   + Optional("/", default=[False])("empty").setParseAction(lambda s,l,t:t[0]=='/')
+                   + suppress_GT)
+    else:
+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printables, excludeChars=">")
+        openTag = (suppress_LT
+                   + tagStr("tag")
+                   + Dict(ZeroOrMore(Group(tagAttrName.setParseAction(downcaseTokens)
+                                           + Optional(Suppress("=") + tagAttrValue))))
+                   + Optional("/",default=[False])("empty").setParseAction(lambda s,l,t:t[0]=='/')
+                   + suppress_GT)
+    closeTag = Combine(_L("</") + tagStr + ">", adjacent=False)
+
+    openTag.setName("<%s>" % resname)
+    # add start<tagname> results name in parse action now that ungrouped names are not reported at two levels
+    openTag.addParseAction(lambda t: t.__setitem__("start"+"".join(resname.replace(":"," ").title().split()), t.copy()))
+    closeTag = closeTag("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    openTag.tag_body = SkipTo(closeTag())
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """Helper to construct opening and closing tag expressions for HTML,
+    given a tag name. Matches tags in either upper or lower case,
+    attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+
+        text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and
+        # closing tags as a 2-tuple
+        a,a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are
+            # also accessible as named results
+            print(link.link_text, '->', link.href)
+
+    prints::
+
+        pyparsing -> https://github.com/pyparsing/pyparsing/wiki
+    """
+    return _makeTags( tagStr, False )
+
+def makeXMLTags(tagStr):
+    """Helper to construct opening and closing tag expressions for XML,
+    given a tag name. Matches tags only in the given upper/lower case.
+
+    Example: similar to :class:`makeHTMLTags`
+    """
+    return _makeTags( tagStr, True )
+
+def withAttribute(*args,**attrDict):
+    """Helper to create a validating parse action to be used with start
+    tags created with :class:`makeXMLTags` or
+    :class:`makeHTMLTags`. Use ``withAttribute`` to qualify
+    a starting tag with a required attribute value, to avoid false
+    matches on common tags such as ``<TD>`` or ``<DIV>``.
+
+    Call ``withAttribute`` with a series of attribute names and
+    values. Specify the list of filter attributes names and values as:
+
+     - keyword arguments, as in ``(align="right")``, or
+     - as an explicit dict with ``**`` operator, when an attribute
+       name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
+     - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align","right"))``
+
+    For attribute names with a namespace prefix, you must use the second
+    form.  Attribute names are matched insensitive to upper/lower case.
+
+    If just testing for ``class`` (with or without a namespace), use
+    :class:`withClass`.
+
+    To verify that the attribute exists, but without specifying a value,
+    pass ``withAttribute.ANY_VALUE`` as the value.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k,v) for k,v in attrs]
+    def pa(s,l,tokens):
+        for attrName,attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s,l,"no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """Simplified version of :class:`withAttribute` when
+    matching on a div class - made difficult because ``class`` is
+    a reserved word in Python.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr : classname})
+
+opAssoc = SimpleNamespace()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
+    """Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary
+    or binary, left- or right-associative.  Parse actions can also be
+    attached to operator expressions. The generated parser will also
+    recognize the use of parentheses to override operator precedences
+    (see example below).
+
+    Note: if you define a deep operator list, you may see performance
+    issues when using infixNotation. See
+    :class:`ParserElement.enablePackrat` for a mechanism to potentially
+    improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the
+       nested
+     - opList - list of tuples, one for each operator precedence level
+       in the expression grammar; each tuple is of the form ``(opExpr,
+       numTerms, rightLeftAssoc, parseAction)``, where:
+
+       - opExpr is the pyparsing expression for the operator; may also
+         be a string, which will be converted to a Literal; if numTerms
+         is 3, opExpr is a tuple of two expressions, for the two
+         operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must be 1,
+         2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is right
+         or left associative, using the pyparsing-defined constants
+         ``opAssoc.RIGHT`` and ``opAssoc.LEFT``.
+       - parseAction is the parse action to be associated with
+         expressions matching this operator expression (the parse action
+         tuple member may be omitted); if the parse action is passed
+         a tuple or list of functions, this is equivalent to calling
+         ``setParseAction(*fn)``
+         (:class:`ParserElement.setParseAction`)
+     - lpar - expression for matching left-parentheses
+       (default= ``Suppress('(')``)
+     - rpar - expression for matching right-parentheses
+       (default= ``Suppress(')')``)
+
+    Example::
+
+        # simple example of four-function arithmetic with ints and
+        # variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier
+
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+
+    prints::
+
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    # captive version of FollowedBy that does not do parse actions or capture results names
+    class _FB(FollowedBy):
+        def parseImpl(self, instring, loc, doActions=True):
+            self.expr.tryParse(instring, loc)
+            return loc, []
+
+    ret = Forward()
+    lastExpr = baseExpr | ( lpar + ret + rpar )
+    for i,operDef in enumerate(opList):
+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError(
+                    "if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = _FB(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
+                else:
+                    matchExpr = _FB(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
+            elif arity == 3:
+                matchExpr = _FB(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = _FB(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
+                else:
+                    matchExpr = _FB(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
+            elif arity == 3:
+                matchExpr = _FB(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of :class:`infixNotation`, will be
+dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """Helper method for defining nested lists enclosed in opening and
+    closing delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list
+       (default= ``"("``); can also be a pyparsing expression
+     - closer - closing character for a nested list
+       (default= ``")"``); can also be a pyparsing expression
+     - content - expression for items within the nested lists
+       (default= ``None``)
+     - ignoreExpr - expression for ignoring opening and closing
+       delimiters (default= :class:`quotedString`)
+
+    If an expression is not provided for the content argument, the
+    nested expression will capture all whitespace-delimited content
+    between delimiters as a list of separate values.
+
+    Use the ``ignoreExpr`` argument to define expressions that may
+    contain opening or closing characters that should not be treated as
+    opening or closing characters for nesting, such as quotedString or
+    a comment expression.  Specify multiple expressions using an
+    :class:`Or` or :class:`MatchFirst`. The default is
+    :class:`quotedString`, but if no expressions are to be ignored, then
+    pass ``None`` for this argument.
+
+    Example::
+
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR,RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type")
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+
+        source_code = '''
+            int is_odd(int x) {
+                return (x%2);
+            }
+
+            int dec_to_hex(char hchar) {
+                if (hchar >= '0' && hchar <= '9') {
+                    return (ord(hchar)-ord('0'));
+                } else {
+                    return (10+ord(hchar)-ord('A'));
+                }
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+
+    prints::
+
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener,basestring) and isinstance(closer,basestring):
+            if len(opener) == 1 and len(closer)==1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
+                                ).setParseAction(lambda t:t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    ~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
+    else:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
+    ret.setName('nested %s%s expression' % (opener,closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """Helper method for defining space-delimited indentation blocks,
+    such as those used to define block statements in Python source code.
+
+    Parameters:
+
+     - blockStatementExpr - expression defining syntax of statement that
+       is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+       (multiple statementWithIndentedBlock expressions within a single
+       grammar should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond
+       the the current level; set to False for block of left-most
+       statements (default= ``True``)
+
+    A valid block must contain at least one ``blockStatement``.
+
+    Example::
+
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group( funcDecl + func_body )
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << ( funcDef | assignment | identifier )
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+
+    prints::
+
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]]
+    """
+    backup_stack = indentStack[:]
+
+    def reset_stack():
+        indentStack[:] = backup_stack
+
+    def checkPeerIndent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseException(s,l,"illegal nesting")
+            raise ParseException(s,l,"not a peer entry")
+
+    def checkSubIndent(s,l,t):
+        curCol = col(l,s)
+        if curCol > indentStack[-1]:
+            indentStack.append( curCol )
+        else:
+            raise ParseException(s,l,"not a subentry")
+
+    def checkUnindent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
+            raise ParseException(s,l,"not an unindent")
+        indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group( Optional(NL) +
+            #~ FollowedBy(blockStatementExpr) +
+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
+    else:
+        smExpr = Group( Optional(NL) +
+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
+    smExpr.setFailAction(lambda a, b, c, d: reset_stack())
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form ``/* ... */``"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form ``<!-- ... -->``"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form ``// ... (to end of line)``"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
+"Comment of either form :class:`cStyleComment` or :class:`dblSlashComment`"
+
+javaStyleComment = cppStyleComment
+"Same as :class:`cppStyleComment`"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form ``# ... (to end of line)``"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
+                                  Optional( Word(" \t") +
+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or
+quoted strings, separated by commas.
+
+This expression is deprecated in favor of :class:`pyparsing_common.comma_separated_list`.
+"""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """Here are some common low-level expressions that may be useful in
+    jump-starting parser development:
+
+     - numeric forms (:class:`integers<integer>`, :class:`reals<real>`,
+       :class:`scientific notation<sci_real>`)
+     - common :class:`programming identifiers<identifier>`
+     - network addresses (:class:`MAC<mac_address>`,
+       :class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
+     - ISO8601 :class:`dates<iso8601_date>` and
+       :class:`datetime<iso8601_datetime>`
+     - :class:`UUID<uuid>`
+     - :class:`comma-separated list<comma_separated_list>`
+
+    Parse actions:
+
+     - :class:`convertToInteger`
+     - :class:`convertToFloat`
+     - :class:`convertToDate`
+     - :class:`convertToDatetime`
+     - :class:`stripHTMLTags`
+     - :class:`upcaseTokens`
+     - :class:`downcaseTokens`
+
+    Example::
+
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+
+    prints::
+
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional
+    scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+
+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (``0.0.0.0 - 255.255.255.255``)"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
+
+        Example::
+
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+
+        prints::
+
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """Helper to create a parse action for converting parsed
+        datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
+
+        Example::
+
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+
+        prints::
+
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (``yyyy-mm-dd``)"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """Parse action to remove HTML tags from web page HTML source
+
+        Example::
+
+            # strip HTML links from normal text
+            text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+            td,td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            print(table_text.parseString(text).body)
+
+        Prints::
+
+            More info at the pyparsing wiki page
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',')
+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+class _lazyclassproperty(object):
+    def __init__(self, fn):
+        self.fn = fn
+        self.__doc__ = fn.__doc__
+        self.__name__ = fn.__name__
+
+    def __get__(self, obj, cls):
+        if cls is None:
+            cls = type(obj)
+        if not hasattr(cls, '_intern') or any(cls._intern is getattr(superclass, '_intern', []) for superclass in cls.__mro__[1:]):
+            cls._intern = {}
+        attrname = self.fn.__name__
+        if attrname not in cls._intern:
+            cls._intern[attrname] = self.fn(cls)
+        return cls._intern[attrname]
+
+
+class unicode_set(object):
+    """
+    A set of Unicode characters, for language-specific strings for
+    ``alphas``, ``nums``, ``alphanums``, and ``printables``.
+    A unicode_set is defined by a list of ranges in the Unicode character
+    set, in a class attribute ``_ranges``, such as::
+
+        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
+
+    A unicode set can also be defined using multiple inheritance of other unicode sets::
+
+        class CJK(Chinese, Japanese, Korean):
+            pass
+    """
+    _ranges = []
+
+    @classmethod
+    def _get_chars_for_ranges(cls):
+        ret = []
+        for cc in cls.__mro__:
+            if cc is unicode_set:
+                break
+            for rr in cc._ranges:
+                ret.extend(range(rr[0], rr[-1]+1))
+        return [unichr(c) for c in sorted(set(ret))]
+
+    @_lazyclassproperty
+    def printables(cls):
+        "all non-whitespace characters in this range"
+        return u''.join(filterfalse(unicode.isspace, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def alphas(cls):
+        "all alphabetic characters in this range"
+        return u''.join(filter(unicode.isalpha, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def nums(cls):
+        "all numeric digit characters in this range"
+        return u''.join(filter(unicode.isdigit, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def alphanums(cls):
+        "all alphanumeric characters in this range"
+        return cls.alphas + cls.nums
+
+
+class pyparsing_unicode(unicode_set):
+    """
+    A namespace class for defining common language unicode_sets.
+    """
+    _ranges = [(32, sys.maxunicode)]
+
+    class Latin1(unicode_set):
+        "Unicode set for Latin-1 Unicode Character Range"
+        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
+
+    class LatinA(unicode_set):
+        "Unicode set for Latin-A Unicode Character Range"
+        _ranges = [(0x0100, 0x017f),]
+
+    class LatinB(unicode_set):
+        "Unicode set for Latin-B Unicode Character Range"
+        _ranges = [(0x0180, 0x024f),]
+
+    class Greek(unicode_set):
+        "Unicode set for Greek Unicode Character Ranges"
+        _ranges = [
+            (0x0370, 0x03ff), (0x1f00, 0x1f15), (0x1f18, 0x1f1d), (0x1f20, 0x1f45), (0x1f48, 0x1f4d),
+            (0x1f50, 0x1f57), (0x1f59,), (0x1f5b,), (0x1f5d,), (0x1f5f, 0x1f7d), (0x1f80, 0x1fb4), (0x1fb6, 0x1fc4),
+            (0x1fc6, 0x1fd3), (0x1fd6, 0x1fdb), (0x1fdd, 0x1fef), (0x1ff2, 0x1ff4), (0x1ff6, 0x1ffe),
+        ]
+
+    class Cyrillic(unicode_set):
+        "Unicode set for Cyrillic Unicode Character Range"
+        _ranges = [(0x0400, 0x04ff)]
+
+    class Chinese(unicode_set):
+        "Unicode set for Chinese Unicode Character Range"
+        _ranges = [(0x4e00, 0x9fff), (0x3000, 0x303f), ]
+
+    class Japanese(unicode_set):
+        "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges"
+        _ranges = [ ]
+
+        class Kanji(unicode_set):
+            "Unicode set for Kanji Unicode Character Range"
+            _ranges = [(0x4E00, 0x9Fbf), (0x3000, 0x303f), ]
+
+        class Hiragana(unicode_set):
+            "Unicode set for Hiragana Unicode Character Range"
+            _ranges = [(0x3040, 0x309f), ]
+
+        class Katakana(unicode_set):
+            "Unicode set for Katakana  Unicode Character Range"
+            _ranges = [(0x30a0, 0x30ff), ]
+
+    class Korean(unicode_set):
+        "Unicode set for Korean Unicode Character Range"
+        _ranges = [(0xac00, 0xd7af), (0x1100, 0x11ff), (0x3130, 0x318f), (0xa960, 0xa97f), (0xd7b0, 0xd7ff), (0x3000, 0x303f), ]
+
+    class CJK(Chinese, Japanese, Korean):
+        "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range"
+        pass
+
+    class Thai(unicode_set):
+        "Unicode set for Thai Unicode Character Range"
+        _ranges = [(0x0e01, 0x0e3a), (0x0e3f, 0x0e5b), ]
+
+    class Arabic(unicode_set):
+        "Unicode set for Arabic Unicode Character Range"
+        _ranges = [(0x0600, 0x061b), (0x061e, 0x06ff), (0x0700, 0x077f), ]
+
+    class Hebrew(unicode_set):
+        "Unicode set for Hebrew Unicode Character Range"
+        _ranges = [(0x0590, 0x05ff), ]
+
+    class Devanagari(unicode_set):
+        "Unicode set for Devanagari Unicode Character Range"
+        _ranges = [(0x0900, 0x097f), (0xa8e0, 0xa8ff)]
+
+pyparsing_unicode.Japanese._ranges = (pyparsing_unicode.Japanese.Kanji._ranges
+                                      + pyparsing_unicode.Japanese.Hiragana._ranges
+                                      + pyparsing_unicode.Japanese.Katakana._ranges)
+
+# define ranges in language character sets
+if PY_3:
+    setattr(pyparsing_unicode, "العربية", pyparsing_unicode.Arabic)
+    setattr(pyparsing_unicode, "中文", pyparsing_unicode.Chinese)
+    setattr(pyparsing_unicode, "кириллица", pyparsing_unicode.Cyrillic)
+    setattr(pyparsing_unicode, "Ελληνικά", pyparsing_unicode.Greek)
+    setattr(pyparsing_unicode, "עִברִית", pyparsing_unicode.Hebrew)
+    setattr(pyparsing_unicode, "日本語", pyparsing_unicode.Japanese)
+    setattr(pyparsing_unicode.Japanese, "漢字", pyparsing_unicode.Japanese.Kanji)
+    setattr(pyparsing_unicode.Japanese, "カタカナ", pyparsing_unicode.Japanese.Katakana)
+    setattr(pyparsing_unicode.Japanese, "ひらがな", pyparsing_unicode.Japanese.Hiragana)
+    setattr(pyparsing_unicode, "한국어", pyparsing_unicode.Korean)
+    setattr(pyparsing_unicode, "ไทย", pyparsing_unicode.Thai)
+    setattr(pyparsing_unicode, "देवनागरी", pyparsing_unicode.Devanagari)
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__init__.py
new file mode 100644
index 00000000..8ed060ff
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__init__.py
@@ -0,0 +1,4 @@
+from .core import TomlError
+from .parser import load, loads
+from .test import translate_to_test
+from .writer import dump, dumps
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..c77bf0ce
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/core.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/core.cpython-37.pyc
new file mode 100644
index 00000000..eafd47e0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/core.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/parser.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/parser.cpython-37.pyc
new file mode 100644
index 00000000..1b92f436
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/parser.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/test.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/test.cpython-37.pyc
new file mode 100644
index 00000000..385d62e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/test.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..9c9019d7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/writer.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/writer.cpython-37.pyc
new file mode 100644
index 00000000..59a5706c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/__pycache__/writer.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/core.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/core.py
new file mode 100644
index 00000000..c182734e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/core.py
@@ -0,0 +1,13 @@
+class TomlError(RuntimeError):
+    def __init__(self, message, line, col, filename):
+        RuntimeError.__init__(self, message, line, col, filename)
+        self.message = message
+        self.line = line
+        self.col = col
+        self.filename = filename
+
+    def __str__(self):
+        return '{}({}, {}): {}'.format(self.filename, self.line, self.col, self.message)
+
+    def __repr__(self):
+        return 'TomlError({!r}, {!r}, {!r}, {!r})'.format(self.message, self.line, self.col, self.filename)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/parser.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/parser.py
new file mode 100644
index 00000000..3493aa64
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/parser.py
@@ -0,0 +1,341 @@
+import string, re, sys, datetime
+from .core import TomlError
+from .utils import rfc3339_re, parse_rfc3339_re
+
+if sys.version_info[0] == 2:
+    _chr = unichr
+else:
+    _chr = chr
+
+def load(fin, translate=lambda t, x, v: v, object_pairs_hook=dict):
+    return loads(fin.read(), translate=translate, object_pairs_hook=object_pairs_hook, filename=getattr(fin, 'name', repr(fin)))
+
+def loads(s, filename='<string>', translate=lambda t, x, v: v, object_pairs_hook=dict):
+    if isinstance(s, bytes):
+        s = s.decode('utf-8')
+
+    s = s.replace('\r\n', '\n')
+
+    root = object_pairs_hook()
+    tables = object_pairs_hook()
+    scope = root
+
+    src = _Source(s, filename=filename)
+    ast = _p_toml(src, object_pairs_hook=object_pairs_hook)
+
+    def error(msg):
+        raise TomlError(msg, pos[0], pos[1], filename)
+
+    def process_value(v, object_pairs_hook):
+        kind, text, value, pos = v
+        if kind == 'str' and value.startswith('\n'):
+            value = value[1:]
+        if kind == 'array':
+            if value and any(k != value[0][0] for k, t, v, p in value[1:]):
+                error('array-type-mismatch')
+            value = [process_value(item, object_pairs_hook=object_pairs_hook) for item in value]
+        elif kind == 'table':
+            value = object_pairs_hook([(k, process_value(value[k], object_pairs_hook=object_pairs_hook)) for k in value])
+        return translate(kind, text, value)
+
+    for kind, value, pos in ast:
+        if kind == 'kv':
+            k, v = value
+            if k in scope:
+                error('duplicate_keys. Key "{0}" was used more than once.'.format(k))
+            scope[k] = process_value(v, object_pairs_hook=object_pairs_hook)
+        else:
+            is_table_array = (kind == 'table_array')
+            cur = tables
+            for name in value[:-1]:
+                if isinstance(cur.get(name), list):
+                    d, cur = cur[name][-1]
+                else:
+                    d, cur = cur.setdefault(name, (None, object_pairs_hook()))
+
+            scope = object_pairs_hook()
+            name = value[-1]
+            if name not in cur:
+                if is_table_array:
+                    cur[name] = [(scope, object_pairs_hook())]
+                else:
+                    cur[name] = (scope, object_pairs_hook())
+            elif isinstance(cur[name], list):
+                if not is_table_array:
+                    error('table_type_mismatch')
+                cur[name].append((scope, object_pairs_hook()))
+            else:
+                if is_table_array:
+                    error('table_type_mismatch')
+                old_scope, next_table = cur[name]
+                if old_scope is not None:
+                    error('duplicate_tables')
+                cur[name] = (scope, next_table)
+
+    def merge_tables(scope, tables):
+        if scope is None:
+            scope = object_pairs_hook()
+        for k in tables:
+            if k in scope:
+                error('key_table_conflict')
+            v = tables[k]
+            if isinstance(v, list):
+                scope[k] = [merge_tables(sc, tbl) for sc, tbl in v]
+            else:
+                scope[k] = merge_tables(v[0], v[1])
+        return scope
+
+    return merge_tables(root, tables)
+
+class _Source:
+    def __init__(self, s, filename=None):
+        self.s = s
+        self._pos = (1, 1)
+        self._last = None
+        self._filename = filename
+        self.backtrack_stack = []
+
+    def last(self):
+        return self._last
+
+    def pos(self):
+        return self._pos
+
+    def fail(self):
+        return self._expect(None)
+
+    def consume_dot(self):
+        if self.s:
+            self._last = self.s[0]
+            self.s = self[1:]
+            self._advance(self._last)
+            return self._last
+        return None
+
+    def expect_dot(self):
+        return self._expect(self.consume_dot())
+
+    def consume_eof(self):
+        if not self.s:
+            self._last = ''
+            return True
+        return False
+
+    def expect_eof(self):
+        return self._expect(self.consume_eof())
+
+    def consume(self, s):
+        if self.s.startswith(s):
+            self.s = self.s[len(s):]
+            self._last = s
+            self._advance(s)
+            return True
+        return False
+
+    def expect(self, s):
+        return self._expect(self.consume(s))
+
+    def consume_re(self, re):
+        m = re.match(self.s)
+        if m:
+            self.s = self.s[len(m.group(0)):]
+            self._last = m
+            self._advance(m.group(0))
+            return m
+        return None
+
+    def expect_re(self, re):
+        return self._expect(self.consume_re(re))
+
+    def __enter__(self):
+        self.backtrack_stack.append((self.s, self._pos))
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            self.backtrack_stack.pop()
+        else:
+            self.s, self._pos = self.backtrack_stack.pop()
+        return type == TomlError
+
+    def commit(self):
+        self.backtrack_stack[-1] = (self.s, self._pos)
+
+    def _expect(self, r):
+        if not r:
+            raise TomlError('msg', self._pos[0], self._pos[1], self._filename)
+        return r
+
+    def _advance(self, s):
+        suffix_pos = s.rfind('\n')
+        if suffix_pos == -1:
+            self._pos = (self._pos[0], self._pos[1] + len(s))
+        else:
+            self._pos = (self._pos[0] + s.count('\n'), len(s) - suffix_pos)
+
+_ews_re = re.compile(r'(?:[ \t]|#[^\n]*\n|#[^\n]*\Z|\n)*')
+def _p_ews(s):
+    s.expect_re(_ews_re)
+
+_ws_re = re.compile(r'[ \t]*')
+def _p_ws(s):
+    s.expect_re(_ws_re)
+
+_escapes = { 'b': '\b', 'n': '\n', 'r': '\r', 't': '\t', '"': '"',
+    '\\': '\\', 'f': '\f' }
+
+_basicstr_re = re.compile(r'[^"\\\000-\037]*')
+_short_uni_re = re.compile(r'u([0-9a-fA-F]{4})')
+_long_uni_re = re.compile(r'U([0-9a-fA-F]{8})')
+_escapes_re = re.compile(r'[btnfr\"\\]')
+_newline_esc_re = re.compile('\n[ \t\n]*')
+def _p_basicstr_content(s, content=_basicstr_re):
+    res = []
+    while True:
+        res.append(s.expect_re(content).group(0))
+        if not s.consume('\\'):
+            break
+        if s.consume_re(_newline_esc_re):
+            pass
+        elif s.consume_re(_short_uni_re) or s.consume_re(_long_uni_re):
+            v = int(s.last().group(1), 16)
+            if 0xd800 <= v < 0xe000:
+                s.fail()
+            res.append(_chr(v))
+        else:
+            s.expect_re(_escapes_re)
+            res.append(_escapes[s.last().group(0)])
+    return ''.join(res)
+
+_key_re = re.compile(r'[0-9a-zA-Z-_]+')
+def _p_key(s):
+    with s:
+        s.expect('"')
+        r = _p_basicstr_content(s, _basicstr_re)
+        s.expect('"')
+        return r
+    if s.consume('\''):
+        if s.consume('\'\''):
+            r = s.expect_re(_litstr_ml_re).group(0)
+            s.expect('\'\'\'')
+        else:
+            r = s.expect_re(_litstr_re).group(0)
+            s.expect('\'')
+        return r
+    return s.expect_re(_key_re).group(0)
+
+_float_re = re.compile(r'[+-]?(?:0|[1-9](?:_?\d)*)(?:\.\d(?:_?\d)*)?(?:[eE][+-]?(?:\d(?:_?\d)*))?')
+
+_basicstr_ml_re = re.compile(r'(?:""?(?!")|[^"\\\000-\011\013-\037])*')
+_litstr_re = re.compile(r"[^'\000\010\012-\037]*")
+_litstr_ml_re = re.compile(r"(?:(?:|'|'')(?:[^'\000-\010\013-\037]))*")
+def _p_value(s, object_pairs_hook):
+    pos = s.pos()
+
+    if s.consume('true'):
+        return 'bool', s.last(), True, pos
+    if s.consume('false'):
+        return 'bool', s.last(), False, pos
+
+    if s.consume('"'):
+        if s.consume('""'):
+            r = _p_basicstr_content(s, _basicstr_ml_re)
+            s.expect('"""')
+        else:
+            r = _p_basicstr_content(s, _basicstr_re)
+            s.expect('"')
+        return 'str', r, r, pos
+
+    if s.consume('\''):
+        if s.consume('\'\''):
+            r = s.expect_re(_litstr_ml_re).group(0)
+            s.expect('\'\'\'')
+        else:
+            r = s.expect_re(_litstr_re).group(0)
+            s.expect('\'')
+        return 'str', r, r, pos
+
+    if s.consume_re(rfc3339_re):
+        m = s.last()
+        return 'datetime', m.group(0), parse_rfc3339_re(m), pos
+
+    if s.consume_re(_float_re):
+        m = s.last().group(0)
+        r = m.replace('_','')
+        if '.' in m or 'e' in m or 'E' in m:
+            return 'float', m, float(r), pos
+        else:
+            return 'int', m, int(r, 10), pos
+
+    if s.consume('['):
+        items = []
+        with s:
+            while True:
+                _p_ews(s)
+                items.append(_p_value(s, object_pairs_hook=object_pairs_hook))
+                s.commit()
+                _p_ews(s)
+                s.expect(',')
+                s.commit()
+        _p_ews(s)
+        s.expect(']')
+        return 'array', None, items, pos
+
+    if s.consume('{'):
+        _p_ws(s)
+        items = object_pairs_hook()
+        if not s.consume('}'):
+            k = _p_key(s)
+            _p_ws(s)
+            s.expect('=')
+            _p_ws(s)
+            items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
+            _p_ws(s)
+            while s.consume(','):
+                _p_ws(s)
+                k = _p_key(s)
+                _p_ws(s)
+                s.expect('=')
+                _p_ws(s)
+                items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
+                _p_ws(s)
+            s.expect('}')
+        return 'table', None, items, pos
+
+    s.fail()
+
+def _p_stmt(s, object_pairs_hook):
+    pos = s.pos()
+    if s.consume(   '['):
+        is_array = s.consume('[')
+        _p_ws(s)
+        keys = [_p_key(s)]
+        _p_ws(s)
+        while s.consume('.'):
+            _p_ws(s)
+            keys.append(_p_key(s))
+            _p_ws(s)
+        s.expect(']')
+        if is_array:
+            s.expect(']')
+        return 'table_array' if is_array else 'table', keys, pos
+
+    key = _p_key(s)
+    _p_ws(s)
+    s.expect('=')
+    _p_ws(s)
+    value = _p_value(s, object_pairs_hook=object_pairs_hook)
+    return 'kv', (key, value), pos
+
+_stmtsep_re = re.compile(r'(?:[ \t]*(?:#[^\n]*)?\n)+[ \t]*')
+def _p_toml(s, object_pairs_hook):
+    stmts = []
+    _p_ews(s)
+    with s:
+        stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
+        while True:
+            s.commit()
+            s.expect_re(_stmtsep_re)
+            stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
+    _p_ews(s)
+    s.expect_eof()
+    return stmts
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/test.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/test.py
new file mode 100644
index 00000000..ec8abfc6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/test.py
@@ -0,0 +1,30 @@
+import datetime
+from .utils import format_rfc3339
+
+try:
+    _string_types = (str, unicode)
+    _int_types = (int, long)
+except NameError:
+    _string_types = str
+    _int_types = int
+
+def translate_to_test(v):
+    if isinstance(v, dict):
+        return { k: translate_to_test(v) for k, v in v.items() }
+    if isinstance(v, list):
+        a = [translate_to_test(x) for x in v]
+        if v and isinstance(v[0], dict):
+            return a
+        else:
+            return {'type': 'array', 'value': a}
+    if isinstance(v, datetime.datetime):
+        return {'type': 'datetime', 'value': format_rfc3339(v)}
+    if isinstance(v, bool):
+        return {'type': 'bool', 'value': 'true' if v else 'false'}
+    if isinstance(v, _int_types):
+        return {'type': 'integer', 'value': str(v)}
+    if isinstance(v, float):
+        return {'type': 'float', 'value': '{:.17}'.format(v)}
+    if isinstance(v, _string_types):
+        return {'type': 'string', 'value': v}
+    raise RuntimeError('unexpected value: {!r}'.format(v))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/utils.py
new file mode 100644
index 00000000..636a680b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/utils.py
@@ -0,0 +1,67 @@
+import datetime
+import re
+
+rfc3339_re = re.compile(r'(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(\.\d+)?(?:Z|([+-]\d{2}):(\d{2}))')
+
+def parse_rfc3339(v):
+    m = rfc3339_re.match(v)
+    if not m or m.group(0) != v:
+        return None
+    return parse_rfc3339_re(m)
+
+def parse_rfc3339_re(m):
+    r = map(int, m.groups()[:6])
+    if m.group(7):
+        micro = float(m.group(7))
+    else:
+        micro = 0
+
+    if m.group(8):
+        g = int(m.group(8), 10) * 60 + int(m.group(9), 10)
+        tz = _TimeZone(datetime.timedelta(0, g * 60))
+    else:
+        tz = _TimeZone(datetime.timedelta(0, 0))
+
+    y, m, d, H, M, S = r
+    return datetime.datetime(y, m, d, H, M, S, int(micro * 1000000), tz)
+
+
+def format_rfc3339(v):
+    offs = v.utcoffset()
+    offs = int(offs.total_seconds()) // 60 if offs is not None else 0
+
+    if offs == 0:
+        suffix = 'Z'
+    else:
+        if offs > 0:
+            suffix = '+'
+        else:
+            suffix = '-'
+            offs = -offs
+        suffix = '{0}{1:02}:{2:02}'.format(suffix, offs // 60, offs % 60)
+
+    if v.microsecond:
+        return v.strftime('%Y-%m-%dT%H:%M:%S.%f') + suffix
+    else:
+        return v.strftime('%Y-%m-%dT%H:%M:%S') + suffix
+
+class _TimeZone(datetime.tzinfo):
+    def __init__(self, offset):
+        self._offset = offset
+
+    def utcoffset(self, dt):
+        return self._offset
+
+    def dst(self, dt):
+        return None
+
+    def tzname(self, dt):
+        m = self._offset.total_seconds() // 60
+        if m < 0:
+            res = '-'
+            m = -m
+        else:
+            res = '+'
+        h = m // 60
+        m = m - h * 60
+        return '{}{:.02}{:.02}'.format(res, h, m)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/writer.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/writer.py
new file mode 100644
index 00000000..73b5089c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/pytoml/writer.py
@@ -0,0 +1,106 @@
+from __future__ import unicode_literals
+import io, datetime, math, string, sys
+
+from .utils import format_rfc3339
+
+if sys.version_info[0] == 3:
+    long = int
+    unicode = str
+
+
+def dumps(obj, sort_keys=False):
+    fout = io.StringIO()
+    dump(obj, fout, sort_keys=sort_keys)
+    return fout.getvalue()
+
+
+_escapes = {'\n': 'n', '\r': 'r', '\\': '\\', '\t': 't', '\b': 'b', '\f': 'f', '"': '"'}
+
+
+def _escape_string(s):
+    res = []
+    start = 0
+
+    def flush():
+        if start != i:
+            res.append(s[start:i])
+        return i + 1
+
+    i = 0
+    while i < len(s):
+        c = s[i]
+        if c in '"\\\n\r\t\b\f':
+            start = flush()
+            res.append('\\' + _escapes[c])
+        elif ord(c) < 0x20:
+            start = flush()
+            res.append('\\u%04x' % ord(c))
+        i += 1
+
+    flush()
+    return '"' + ''.join(res) + '"'
+
+
+_key_chars = string.digits + string.ascii_letters + '-_'
+def _escape_id(s):
+    if any(c not in _key_chars for c in s):
+        return _escape_string(s)
+    return s
+
+
+def _format_value(v):
+    if isinstance(v, bool):
+        return 'true' if v else 'false'
+    if isinstance(v, int) or isinstance(v, long):
+        return unicode(v)
+    if isinstance(v, float):
+        if math.isnan(v) or math.isinf(v):
+            raise ValueError("{0} is not a valid TOML value".format(v))
+        else:
+            return repr(v)
+    elif isinstance(v, unicode) or isinstance(v, bytes):
+        return _escape_string(v)
+    elif isinstance(v, datetime.datetime):
+        return format_rfc3339(v)
+    elif isinstance(v, list):
+        return '[{0}]'.format(', '.join(_format_value(obj) for obj in v))
+    elif isinstance(v, dict):
+        return '{{{0}}}'.format(', '.join('{} = {}'.format(_escape_id(k), _format_value(obj)) for k, obj in v.items()))
+    else:
+        raise RuntimeError(v)
+
+
+def dump(obj, fout, sort_keys=False):
+    tables = [((), obj, False)]
+
+    while tables:
+        name, table, is_array = tables.pop()
+        if name:
+            section_name = '.'.join(_escape_id(c) for c in name)
+            if is_array:
+                fout.write('[[{0}]]\n'.format(section_name))
+            else:
+                fout.write('[{0}]\n'.format(section_name))
+
+        table_keys = sorted(table.keys()) if sort_keys else table.keys()
+        new_tables = []
+        has_kv = False
+        for k in table_keys:
+            v = table[k]
+            if isinstance(v, dict):
+                new_tables.append((name + (k,), v, False))
+            elif isinstance(v, list) and v and all(isinstance(o, dict) for o in v):
+                new_tables.extend((name + (k,), d, True) for d in v)
+            elif v is None:
+                # based on mojombo's comment: https://github.com/toml-lang/toml/issues/146#issuecomment-25019344
+                fout.write(
+                    '#{} = null  # To use: uncomment and replace null with value\n'.format(_escape_id(k)))
+                has_kv = True
+            else:
+                fout.write('{0} = {1}\n'.format(_escape_id(k), _format_value(v)))
+                has_kv = True
+
+        tables.extend(reversed(new_tables))
+
+        if (name or has_kv) and tables:
+            fout.write('\n')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__init__.py
new file mode 100644
index 00000000..1d30e3e0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__init__.py
@@ -0,0 +1,133 @@
+# -*- coding: utf-8 -*-
+
+#   __
+#  /__)  _  _     _   _ _/   _
+# / (   (- (/ (/ (- _)  /  _)
+#          /
+
+"""
+Requests HTTP Library
+~~~~~~~~~~~~~~~~~~~~~
+
+Requests is an HTTP library, written in Python, for human beings. Basic GET
+usage:
+
+   >>> import requests
+   >>> r = requests.get('https://www.python.org')
+   >>> r.status_code
+   200
+   >>> 'Python is a programming language' in r.content
+   True
+
+... or POST:
+
+   >>> payload = dict(key1='value1', key2='value2')
+   >>> r = requests.post('https://httpbin.org/post', data=payload)
+   >>> print(r.text)
+   {
+     ...
+     "form": {
+       "key2": "value2",
+       "key1": "value1"
+     },
+     ...
+   }
+
+The other HTTP methods are supported - see `requests.api`. Full documentation
+is at <http://python-requests.org>.
+
+:copyright: (c) 2017 by Kenneth Reitz.
+:license: Apache 2.0, see LICENSE for more details.
+"""
+
+from pip._vendor import urllib3
+from pip._vendor import chardet
+import warnings
+from .exceptions import RequestsDependencyWarning
+
+
+def check_compatibility(urllib3_version, chardet_version):
+    urllib3_version = urllib3_version.split('.')
+    assert urllib3_version != ['dev']  # Verify urllib3 isn't installed from git.
+
+    # Sometimes, urllib3 only reports its version as 16.1.
+    if len(urllib3_version) == 2:
+        urllib3_version.append('0')
+
+    # Check urllib3 for compatibility.
+    major, minor, patch = urllib3_version  # noqa: F811
+    major, minor, patch = int(major), int(minor), int(patch)
+    # urllib3 >= 1.21.1, <= 1.25
+    assert major == 1
+    assert minor >= 21
+    assert minor <= 25
+
+    # Check chardet for compatibility.
+    major, minor, patch = chardet_version.split('.')[:3]
+    major, minor, patch = int(major), int(minor), int(patch)
+    # chardet >= 3.0.2, < 3.1.0
+    assert major == 3
+    assert minor < 1
+    assert patch >= 2
+
+
+def _check_cryptography(cryptography_version):
+    # cryptography < 1.3.4
+    try:
+        cryptography_version = list(map(int, cryptography_version.split('.')))
+    except ValueError:
+        return
+
+    if cryptography_version < [1, 3, 4]:
+        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
+        warnings.warn(warning, RequestsDependencyWarning)
+
+# Check imported dependencies for compatibility.
+try:
+    check_compatibility(urllib3.__version__, chardet.__version__)
+except (AssertionError, ValueError):
+    warnings.warn("urllib3 ({}) or chardet ({}) doesn't match a supported "
+                  "version!".format(urllib3.__version__, chardet.__version__),
+                  RequestsDependencyWarning)
+
+# Attempt to enable urllib3's SNI support, if possible
+from pip._internal.utils.compat import WINDOWS
+if not WINDOWS:
+    try:
+        from pip._vendor.urllib3.contrib import pyopenssl
+        pyopenssl.inject_into_urllib3()
+
+        # Check cryptography version
+        from cryptography import __version__ as cryptography_version
+        _check_cryptography(cryptography_version)
+    except ImportError:
+        pass
+
+# urllib3's DependencyWarnings should be silenced.
+from pip._vendor.urllib3.exceptions import DependencyWarning
+warnings.simplefilter('ignore', DependencyWarning)
+
+from .__version__ import __title__, __description__, __url__, __version__
+from .__version__ import __build__, __author__, __author_email__, __license__
+from .__version__ import __copyright__, __cake__
+
+from . import utils
+from . import packages
+from .models import Request, Response, PreparedRequest
+from .api import request, get, head, post, patch, put, delete, options
+from .sessions import session, Session
+from .status_codes import codes
+from .exceptions import (
+    RequestException, Timeout, URLRequired,
+    TooManyRedirects, HTTPError, ConnectionError,
+    FileModeWarning, ConnectTimeout, ReadTimeout
+)
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+# FileModeWarnings go off per the default.
+warnings.simplefilter('default', FileModeWarning, append=True)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..7f3c9fc8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__version__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__version__.cpython-37.pyc
new file mode 100644
index 00000000..fb18c78b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/__version__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/_internal_utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/_internal_utils.cpython-37.pyc
new file mode 100644
index 00000000..f5ec913c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/_internal_utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/adapters.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/adapters.cpython-37.pyc
new file mode 100644
index 00000000..c2745459
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/adapters.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/api.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/api.cpython-37.pyc
new file mode 100644
index 00000000..a73135de
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/api.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/auth.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/auth.cpython-37.pyc
new file mode 100644
index 00000000..b9f45ad0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/auth.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/certs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/certs.cpython-37.pyc
new file mode 100644
index 00000000..fefda569
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/certs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/compat.cpython-37.pyc
new file mode 100644
index 00000000..ae2595b8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/cookies.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/cookies.cpython-37.pyc
new file mode 100644
index 00000000..8a7a2c99
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/cookies.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/exceptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/exceptions.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/exceptions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/help.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/help.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/help.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/hooks.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/hooks.cpython-37.pyc
new file mode 100644
index 00000000..e5b598be
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/hooks.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/models.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/models.cpython-37.pyc
new file mode 100644
index 00000000..8c77df8d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/models.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/packages.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/packages.cpython-37.pyc
new file mode 100644
index 00000000..ef0d3914
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/packages.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/sessions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/sessions.cpython-37.pyc
new file mode 100644
index 00000000..4627c7a0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/sessions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/status_codes.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/status_codes.cpython-37.pyc
new file mode 100644
index 00000000..f4ee09bd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/status_codes.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/structures.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/structures.cpython-37.pyc
new file mode 100644
index 00000000..93c5d2e5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/structures.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..9a00b700
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__version__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__version__.py
new file mode 100644
index 00000000..9844f740
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/__version__.py
@@ -0,0 +1,14 @@
+# .-. .-. .-. . . .-. .-. .-. .-.
+# |(  |-  |.| | | |-  `-.  |  `-.
+# ' ' `-' `-`.`-' `-' `-'  '  `-'
+
+__title__ = 'requests'
+__description__ = 'Python HTTP for Humans.'
+__url__ = 'http://python-requests.org'
+__version__ = '2.22.0'
+__build__ = 0x022200
+__author__ = 'Kenneth Reitz'
+__author_email__ = 'me@kennethreitz.org'
+__license__ = 'Apache 2.0'
+__copyright__ = 'Copyright 2019 Kenneth Reitz'
+__cake__ = u'\u2728 \U0001f370 \u2728'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/_internal_utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/_internal_utils.py
new file mode 100644
index 00000000..759d9a56
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/_internal_utils.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests._internal_utils
+~~~~~~~~~~~~~~
+
+Provides utility functions that are consumed internally by Requests
+which depend on extremely few external helpers (such as compat)
+"""
+
+from .compat import is_py2, builtin_str, str
+
+
+def to_native_string(string, encoding='ascii'):
+    """Given a string object, regardless of type, returns a representation of
+    that string in the native string type, encoding and decoding where
+    necessary. This assumes ASCII unless told otherwise.
+    """
+    if isinstance(string, builtin_str):
+        out = string
+    else:
+        if is_py2:
+            out = string.encode(encoding)
+        else:
+            out = string.decode(encoding)
+
+    return out
+
+
+def unicode_is_ascii(u_string):
+    """Determine if unicode string only contains ASCII characters.
+
+    :param str u_string: unicode string to check. Must be unicode
+        and not Python 2 `str`.
+    :rtype: bool
+    """
+    assert isinstance(u_string, str)
+    try:
+        u_string.encode('ascii')
+        return True
+    except UnicodeEncodeError:
+        return False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/adapters.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/adapters.py
new file mode 100644
index 00000000..c30e7c92
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/adapters.py
@@ -0,0 +1,533 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.adapters
+~~~~~~~~~~~~~~~~~
+
+This module contains the transport adapters that Requests uses to define
+and maintain connections.
+"""
+
+import os.path
+import socket
+
+from pip._vendor.urllib3.poolmanager import PoolManager, proxy_from_url
+from pip._vendor.urllib3.response import HTTPResponse
+from pip._vendor.urllib3.util import parse_url
+from pip._vendor.urllib3.util import Timeout as TimeoutSauce
+from pip._vendor.urllib3.util.retry import Retry
+from pip._vendor.urllib3.exceptions import ClosedPoolError
+from pip._vendor.urllib3.exceptions import ConnectTimeoutError
+from pip._vendor.urllib3.exceptions import HTTPError as _HTTPError
+from pip._vendor.urllib3.exceptions import MaxRetryError
+from pip._vendor.urllib3.exceptions import NewConnectionError
+from pip._vendor.urllib3.exceptions import ProxyError as _ProxyError
+from pip._vendor.urllib3.exceptions import ProtocolError
+from pip._vendor.urllib3.exceptions import ReadTimeoutError
+from pip._vendor.urllib3.exceptions import SSLError as _SSLError
+from pip._vendor.urllib3.exceptions import ResponseError
+from pip._vendor.urllib3.exceptions import LocationValueError
+
+from .models import Response
+from .compat import urlparse, basestring
+from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
+                    get_encoding_from_headers, prepend_scheme_if_needed,
+                    get_auth_from_url, urldefragauth, select_proxy)
+from .structures import CaseInsensitiveDict
+from .cookies import extract_cookies_to_jar
+from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
+                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
+                         InvalidURL)
+from .auth import _basic_auth_str
+
+try:
+    from pip._vendor.urllib3.contrib.socks import SOCKSProxyManager
+except ImportError:
+    def SOCKSProxyManager(*args, **kwargs):
+        raise InvalidSchema("Missing dependencies for SOCKS support.")
+
+DEFAULT_POOLBLOCK = False
+DEFAULT_POOLSIZE = 10
+DEFAULT_RETRIES = 0
+DEFAULT_POOL_TIMEOUT = None
+
+
+class BaseAdapter(object):
+    """The Base Transport Adapter"""
+
+    def __init__(self):
+        super(BaseAdapter, self).__init__()
+
+    def send(self, request, stream=False, timeout=None, verify=True,
+             cert=None, proxies=None):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        """
+        raise NotImplementedError
+
+    def close(self):
+        """Cleans up adapter specific items."""
+        raise NotImplementedError
+
+
+class HTTPAdapter(BaseAdapter):
+    """The built-in HTTP Adapter for urllib3.
+
+    Provides a general-case interface for Requests sessions to contact HTTP and
+    HTTPS urls by implementing the Transport Adapter interface. This class will
+    usually be created by the :class:`Session <Session>` class under the
+    covers.
+
+    :param pool_connections: The number of urllib3 connection pools to cache.
+    :param pool_maxsize: The maximum number of connections to save in the pool.
+    :param max_retries: The maximum number of retries each connection
+        should attempt. Note, this applies only to failed DNS lookups, socket
+        connections and connection timeouts, never to requests where data has
+        made it to the server. By default, Requests does not retry failed
+        connections. If you need granular control over the conditions under
+        which we retry a request, import urllib3's ``Retry`` class and pass
+        that instead.
+    :param pool_block: Whether the connection pool should block for connections.
+
+    Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
+      >>> s.mount('http://', a)
+    """
+    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
+                 '_pool_block']
+
+    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
+                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
+                 pool_block=DEFAULT_POOLBLOCK):
+        if max_retries == DEFAULT_RETRIES:
+            self.max_retries = Retry(0, read=False)
+        else:
+            self.max_retries = Retry.from_int(max_retries)
+        self.config = {}
+        self.proxy_manager = {}
+
+        super(HTTPAdapter, self).__init__()
+
+        self._pool_connections = pool_connections
+        self._pool_maxsize = pool_maxsize
+        self._pool_block = pool_block
+
+        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
+
+    def __getstate__(self):
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
+        # self.poolmanager uses a lambda function, which isn't pickleable.
+        self.proxy_manager = {}
+        self.config = {}
+
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
+                              block=self._pool_block)
+
+    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
+        """Initializes a urllib3 PoolManager.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param connections: The number of urllib3 connection pools to cache.
+        :param maxsize: The maximum number of connections to save in the pool.
+        :param block: Block when no free connections are available.
+        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
+        """
+        # save these values for pickling
+        self._pool_connections = connections
+        self._pool_maxsize = maxsize
+        self._pool_block = block
+
+        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
+                                       block=block, strict=True, **pool_kwargs)
+
+    def proxy_manager_for(self, proxy, **proxy_kwargs):
+        """Return urllib3 ProxyManager for the given proxy.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The proxy to return a urllib3 ProxyManager for.
+        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
+        :returns: ProxyManager
+        :rtype: urllib3.ProxyManager
+        """
+        if proxy in self.proxy_manager:
+            manager = self.proxy_manager[proxy]
+        elif proxy.lower().startswith('socks'):
+            username, password = get_auth_from_url(proxy)
+            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
+                proxy,
+                username=username,
+                password=password,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs
+            )
+        else:
+            proxy_headers = self.proxy_headers(proxy)
+            manager = self.proxy_manager[proxy] = proxy_from_url(
+                proxy,
+                proxy_headers=proxy_headers,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs)
+
+        return manager
+
+    def cert_verify(self, conn, url, verify, cert):
+        """Verify a SSL certificate. This method should not be called from user
+        code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param conn: The urllib3 connection object associated with the cert.
+        :param url: The requested URL.
+        :param verify: Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: The SSL certificate to verify.
+        """
+        if url.lower().startswith('https') and verify:
+
+            cert_loc = None
+
+            # Allow self-specified cert location.
+            if verify is not True:
+                cert_loc = verify
+
+            if not cert_loc:
+                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+
+            if not cert_loc or not os.path.exists(cert_loc):
+                raise IOError("Could not find a suitable TLS CA certificate bundle, "
+                              "invalid path: {}".format(cert_loc))
+
+            conn.cert_reqs = 'CERT_REQUIRED'
+
+            if not os.path.isdir(cert_loc):
+                conn.ca_certs = cert_loc
+            else:
+                conn.ca_cert_dir = cert_loc
+        else:
+            conn.cert_reqs = 'CERT_NONE'
+            conn.ca_certs = None
+            conn.ca_cert_dir = None
+
+        if cert:
+            if not isinstance(cert, basestring):
+                conn.cert_file = cert[0]
+                conn.key_file = cert[1]
+            else:
+                conn.cert_file = cert
+                conn.key_file = None
+            if conn.cert_file and not os.path.exists(conn.cert_file):
+                raise IOError("Could not find the TLS certificate file, "
+                              "invalid path: {}".format(conn.cert_file))
+            if conn.key_file and not os.path.exists(conn.key_file):
+                raise IOError("Could not find the TLS key file, "
+                              "invalid path: {}".format(conn.key_file))
+
+    def build_response(self, req, resp):
+        """Builds a :class:`Response <requests.Response>` object from a urllib3
+        response. This should not be called from user code, and is only exposed
+        for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
+
+        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
+        :param resp: The urllib3 response object.
+        :rtype: requests.Response
+        """
+        response = Response()
+
+        # Fallback to None if there's no status_code, for whatever reason.
+        response.status_code = getattr(resp, 'status', None)
+
+        # Make headers case-insensitive.
+        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
+
+        # Set encoding.
+        response.encoding = get_encoding_from_headers(response.headers)
+        response.raw = resp
+        response.reason = response.raw.reason
+
+        if isinstance(req.url, bytes):
+            response.url = req.url.decode('utf-8')
+        else:
+            response.url = req.url
+
+        # Add new cookies from the server.
+        extract_cookies_to_jar(response.cookies, req, resp)
+
+        # Give the Response some context.
+        response.request = req
+        response.connection = self
+
+        return response
+
+    def get_connection(self, url, proxies=None):
+        """Returns a urllib3 connection for the given URL. This should not be
+        called from user code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param url: The URL to connect to.
+        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
+        :rtype: urllib3.ConnectionPool
+        """
+        proxy = select_proxy(url, proxies)
+
+        if proxy:
+            proxy = prepend_scheme_if_needed(proxy, 'http')
+            proxy_url = parse_url(proxy)
+            if not proxy_url.host:
+                raise InvalidProxyURL("Please check proxy URL. It is malformed"
+                                      " and could be missing the host.")
+            proxy_manager = self.proxy_manager_for(proxy)
+            conn = proxy_manager.connection_from_url(url)
+        else:
+            # Only scheme should be lower case
+            parsed = urlparse(url)
+            url = parsed.geturl()
+            conn = self.poolmanager.connection_from_url(url)
+
+        return conn
+
+    def close(self):
+        """Disposes of any internal state.
+
+        Currently, this closes the PoolManager and any active ProxyManager,
+        which closes any pooled connections.
+        """
+        self.poolmanager.clear()
+        for proxy in self.proxy_manager.values():
+            proxy.clear()
+
+    def request_url(self, request, proxies):
+        """Obtain the url to use when making the final request.
+
+        If the message is being sent through a HTTP proxy, the full URL has to
+        be used. Otherwise, we should only use the path portion of the URL.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
+        :rtype: str
+        """
+        proxy = select_proxy(request.url, proxies)
+        scheme = urlparse(request.url).scheme
+
+        is_proxied_http_request = (proxy and scheme != 'https')
+        using_socks_proxy = False
+        if proxy:
+            proxy_scheme = urlparse(proxy).scheme.lower()
+            using_socks_proxy = proxy_scheme.startswith('socks')
+
+        url = request.path_url
+        if is_proxied_http_request and not using_socks_proxy:
+            url = urldefragauth(request.url)
+
+        return url
+
+    def add_headers(self, request, **kwargs):
+        """Add any headers needed by the connection. As of v2.0 this does
+        nothing by default, but is left for overriding by users that subclass
+        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
+        :param kwargs: The keyword arguments from the call to send().
+        """
+        pass
+
+    def proxy_headers(self, proxy):
+        """Returns a dictionary of the headers to add to any request sent
+        through a proxy. This works with urllib3 magic to ensure that they are
+        correctly sent to the proxy, rather than in a tunnelled request if
+        CONNECT is being used.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The url of the proxy being used for this request.
+        :rtype: dict
+        """
+        headers = {}
+        username, password = get_auth_from_url(proxy)
+
+        if username:
+            headers['Proxy-Authorization'] = _basic_auth_str(username,
+                                                             password)
+
+        return headers
+
+    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple or urllib3 Timeout object
+        :param verify: (optional) Either a boolean, in which case it controls whether
+            we verify the server's TLS certificate, or a string, in which case it
+            must be a path to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        :rtype: requests.Response
+        """
+
+        try:
+            conn = self.get_connection(request.url, proxies)
+        except LocationValueError as e:
+            raise InvalidURL(e, request=request)
+
+        self.cert_verify(conn, request.url, verify, cert)
+        url = self.request_url(request, proxies)
+        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
+
+        chunked = not (request.body is None or 'Content-Length' in request.headers)
+
+        if isinstance(timeout, tuple):
+            try:
+                connect, read = timeout
+                timeout = TimeoutSauce(connect=connect, read=read)
+            except ValueError as e:
+                # this may raise a string formatting error.
+                err = ("Invalid timeout {}. Pass a (connect, read) "
+                       "timeout tuple, or a single float to set "
+                       "both timeouts to the same value".format(timeout))
+                raise ValueError(err)
+        elif isinstance(timeout, TimeoutSauce):
+            pass
+        else:
+            timeout = TimeoutSauce(connect=timeout, read=timeout)
+
+        try:
+            if not chunked:
+                resp = conn.urlopen(
+                    method=request.method,
+                    url=url,
+                    body=request.body,
+                    headers=request.headers,
+                    redirect=False,
+                    assert_same_host=False,
+                    preload_content=False,
+                    decode_content=False,
+                    retries=self.max_retries,
+                    timeout=timeout
+                )
+
+            # Send the request.
+            else:
+                if hasattr(conn, 'proxy_pool'):
+                    conn = conn.proxy_pool
+
+                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
+
+                try:
+                    low_conn.putrequest(request.method,
+                                        url,
+                                        skip_accept_encoding=True)
+
+                    for header, value in request.headers.items():
+                        low_conn.putheader(header, value)
+
+                    low_conn.endheaders()
+
+                    for i in request.body:
+                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
+                        low_conn.send(b'\r\n')
+                        low_conn.send(i)
+                        low_conn.send(b'\r\n')
+                    low_conn.send(b'0\r\n\r\n')
+
+                    # Receive the response from the server
+                    try:
+                        # For Python 2.7, use buffering of HTTP responses
+                        r = low_conn.getresponse(buffering=True)
+                    except TypeError:
+                        # For compatibility with Python 3.3+
+                        r = low_conn.getresponse()
+
+                    resp = HTTPResponse.from_httplib(
+                        r,
+                        pool=conn,
+                        connection=low_conn,
+                        preload_content=False,
+                        decode_content=False
+                    )
+                except:
+                    # If we hit any problems here, clean up the connection.
+                    # Then, reraise so that we can handle the actual exception.
+                    low_conn.close()
+                    raise
+
+        except (ProtocolError, socket.error) as err:
+            raise ConnectionError(err, request=request)
+
+        except MaxRetryError as e:
+            if isinstance(e.reason, ConnectTimeoutError):
+                # TODO: Remove this in 3.0.0: see #2811
+                if not isinstance(e.reason, NewConnectionError):
+                    raise ConnectTimeout(e, request=request)
+
+            if isinstance(e.reason, ResponseError):
+                raise RetryError(e, request=request)
+
+            if isinstance(e.reason, _ProxyError):
+                raise ProxyError(e, request=request)
+
+            if isinstance(e.reason, _SSLError):
+                # This branch is for urllib3 v1.22 and later.
+                raise SSLError(e, request=request)
+
+            raise ConnectionError(e, request=request)
+
+        except ClosedPoolError as e:
+            raise ConnectionError(e, request=request)
+
+        except _ProxyError as e:
+            raise ProxyError(e)
+
+        except (_SSLError, _HTTPError) as e:
+            if isinstance(e, _SSLError):
+                # This branch is for urllib3 versions earlier than v1.22
+                raise SSLError(e, request=request)
+            elif isinstance(e, ReadTimeoutError):
+                raise ReadTimeout(e, request=request)
+            else:
+                raise
+
+        return self.build_response(request, resp)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/api.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/api.py
new file mode 100644
index 00000000..ef71d075
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/api.py
@@ -0,0 +1,158 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.api
+~~~~~~~~~~~~
+
+This module implements the Requests API.
+
+:copyright: (c) 2012 by Kenneth Reitz.
+:license: Apache2, see LICENSE for more details.
+"""
+
+from . import sessions
+
+
+def request(method, url, **kwargs):
+    """Constructs and sends a :class:`Request <Request>`.
+
+    :param method: method for the new :class:`Request` object.
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
+    :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
+    :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
+    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
+        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
+        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
+        defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
+        to add for the file.
+    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
+    :param timeout: (optional) How many seconds to wait for the server to send data
+        before giving up, as a float, or a :ref:`(connect timeout, read
+        timeout) <timeouts>` tuple.
+    :type timeout: float or tuple
+    :param allow_redirects: (optional) Boolean. Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.
+    :type allow_redirects: bool
+    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
+    :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``.
+    :param stream: (optional) if ``False``, the response content will be immediately downloaded.
+    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.request('GET', 'https://httpbin.org/get')
+      <Response [200]>
+    """
+
+    # By using the 'with' statement we are sure the session is closed, thus we
+    # avoid leaving sockets open which can trigger a ResourceWarning in some
+    # cases, and look like a memory leak in others.
+    with sessions.Session() as session:
+        return session.request(method=method, url=url, **kwargs)
+
+
+def get(url, params=None, **kwargs):
+    r"""Sends a GET request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', True)
+    return request('get', url, params=params, **kwargs)
+
+
+def options(url, **kwargs):
+    r"""Sends an OPTIONS request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', True)
+    return request('options', url, **kwargs)
+
+
+def head(url, **kwargs):
+    r"""Sends a HEAD request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', False)
+    return request('head', url, **kwargs)
+
+
+def post(url, data=None, json=None, **kwargs):
+    r"""Sends a POST request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('post', url, data=data, json=json, **kwargs)
+
+
+def put(url, data=None, **kwargs):
+    r"""Sends a PUT request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('put', url, data=data, **kwargs)
+
+
+def patch(url, data=None, **kwargs):
+    r"""Sends a PATCH request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('patch', url, data=data, **kwargs)
+
+
+def delete(url, **kwargs):
+    r"""Sends a DELETE request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('delete', url, **kwargs)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/auth.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/auth.py
new file mode 100644
index 00000000..bdde51c7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/auth.py
@@ -0,0 +1,305 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.auth
+~~~~~~~~~~~~~
+
+This module contains the authentication handlers for Requests.
+"""
+
+import os
+import re
+import time
+import hashlib
+import threading
+import warnings
+
+from base64 import b64encode
+
+from .compat import urlparse, str, basestring
+from .cookies import extract_cookies_to_jar
+from ._internal_utils import to_native_string
+from .utils import parse_dict_header
+
+CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
+CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
+
+
+def _basic_auth_str(username, password):
+    """Returns a Basic Auth string."""
+
+    # "I want us to put a big-ol' comment on top of it that
+    # says that this behaviour is dumb but we need to preserve
+    # it because people are relying on it."
+    #    - Lukasa
+    #
+    # These are here solely to maintain backwards compatibility
+    # for things like ints. This will be removed in 3.0.0.
+    if not isinstance(username, basestring):
+        warnings.warn(
+            "Non-string usernames will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(username),
+            category=DeprecationWarning,
+        )
+        username = str(username)
+
+    if not isinstance(password, basestring):
+        warnings.warn(
+            "Non-string passwords will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(password),
+            category=DeprecationWarning,
+        )
+        password = str(password)
+    # -- End Removal --
+
+    if isinstance(username, str):
+        username = username.encode('latin1')
+
+    if isinstance(password, str):
+        password = password.encode('latin1')
+
+    authstr = 'Basic ' + to_native_string(
+        b64encode(b':'.join((username, password))).strip()
+    )
+
+    return authstr
+
+
+class AuthBase(object):
+    """Base class that all auth implementations derive from"""
+
+    def __call__(self, r):
+        raise NotImplementedError('Auth hooks must be callable.')
+
+
+class HTTPBasicAuth(AuthBase):
+    """Attaches HTTP Basic Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __eq__(self, other):
+        return all([
+            self.username == getattr(other, 'username', None),
+            self.password == getattr(other, 'password', None)
+        ])
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __call__(self, r):
+        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPProxyAuth(HTTPBasicAuth):
+    """Attaches HTTP Proxy Authentication to a given Request object."""
+
+    def __call__(self, r):
+        r.headers['Proxy-Authorization'] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPDigestAuth(AuthBase):
+    """Attaches HTTP Digest Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+        # Keep state in per-thread local storage
+        self._thread_local = threading.local()
+
+    def init_per_thread_state(self):
+        # Ensure state is initialized just once per-thread
+        if not hasattr(self._thread_local, 'init'):
+            self._thread_local.init = True
+            self._thread_local.last_nonce = ''
+            self._thread_local.nonce_count = 0
+            self._thread_local.chal = {}
+            self._thread_local.pos = None
+            self._thread_local.num_401_calls = None
+
+    def build_digest_header(self, method, url):
+        """
+        :rtype: str
+        """
+
+        realm = self._thread_local.chal['realm']
+        nonce = self._thread_local.chal['nonce']
+        qop = self._thread_local.chal.get('qop')
+        algorithm = self._thread_local.chal.get('algorithm')
+        opaque = self._thread_local.chal.get('opaque')
+        hash_utf8 = None
+
+        if algorithm is None:
+            _algorithm = 'MD5'
+        else:
+            _algorithm = algorithm.upper()
+        # lambdas assume digest modules are imported at the top level
+        if _algorithm == 'MD5' or _algorithm == 'MD5-SESS':
+            def md5_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.md5(x).hexdigest()
+            hash_utf8 = md5_utf8
+        elif _algorithm == 'SHA':
+            def sha_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha1(x).hexdigest()
+            hash_utf8 = sha_utf8
+        elif _algorithm == 'SHA-256':
+            def sha256_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha256(x).hexdigest()
+            hash_utf8 = sha256_utf8
+        elif _algorithm == 'SHA-512':
+            def sha512_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha512(x).hexdigest()
+            hash_utf8 = sha512_utf8
+
+        KD = lambda s, d: hash_utf8("%s:%s" % (s, d))
+
+        if hash_utf8 is None:
+            return None
+
+        # XXX not implemented yet
+        entdig = None
+        p_parsed = urlparse(url)
+        #: path is request-uri defined in RFC 2616 which should not be empty
+        path = p_parsed.path or "/"
+        if p_parsed.query:
+            path += '?' + p_parsed.query
+
+        A1 = '%s:%s:%s' % (self.username, realm, self.password)
+        A2 = '%s:%s' % (method, path)
+
+        HA1 = hash_utf8(A1)
+        HA2 = hash_utf8(A2)
+
+        if nonce == self._thread_local.last_nonce:
+            self._thread_local.nonce_count += 1
+        else:
+            self._thread_local.nonce_count = 1
+        ncvalue = '%08x' % self._thread_local.nonce_count
+        s = str(self._thread_local.nonce_count).encode('utf-8')
+        s += nonce.encode('utf-8')
+        s += time.ctime().encode('utf-8')
+        s += os.urandom(8)
+
+        cnonce = (hashlib.sha1(s).hexdigest()[:16])
+        if _algorithm == 'MD5-SESS':
+            HA1 = hash_utf8('%s:%s:%s' % (HA1, nonce, cnonce))
+
+        if not qop:
+            respdig = KD(HA1, "%s:%s" % (nonce, HA2))
+        elif qop == 'auth' or 'auth' in qop.split(','):
+            noncebit = "%s:%s:%s:%s:%s" % (
+                nonce, ncvalue, cnonce, 'auth', HA2
+            )
+            respdig = KD(HA1, noncebit)
+        else:
+            # XXX handle auth-int.
+            return None
+
+        self._thread_local.last_nonce = nonce
+
+        # XXX should the partial digests be encoded too?
+        base = 'username="%s", realm="%s", nonce="%s", uri="%s", ' \
+               'response="%s"' % (self.username, realm, nonce, path, respdig)
+        if opaque:
+            base += ', opaque="%s"' % opaque
+        if algorithm:
+            base += ', algorithm="%s"' % algorithm
+        if entdig:
+            base += ', digest="%s"' % entdig
+        if qop:
+            base += ', qop="auth", nc=%s, cnonce="%s"' % (ncvalue, cnonce)
+
+        return 'Digest %s' % (base)
+
+    def handle_redirect(self, r, **kwargs):
+        """Reset num_401_calls counter on redirects."""
+        if r.is_redirect:
+            self._thread_local.num_401_calls = 1
+
+    def handle_401(self, r, **kwargs):
+        """
+        Takes the given response and tries digest-auth, if needed.
+
+        :rtype: requests.Response
+        """
+
+        # If response is not 4xx, do not auth
+        # See https://github.com/requests/requests/issues/3772
+        if not 400 <= r.status_code < 500:
+            self._thread_local.num_401_calls = 1
+            return r
+
+        if self._thread_local.pos is not None:
+            # Rewind the file position indicator of the body to where
+            # it was to resend the request.
+            r.request.body.seek(self._thread_local.pos)
+        s_auth = r.headers.get('www-authenticate', '')
+
+        if 'digest' in s_auth.lower() and self._thread_local.num_401_calls < 2:
+
+            self._thread_local.num_401_calls += 1
+            pat = re.compile(r'digest ', flags=re.IGNORECASE)
+            self._thread_local.chal = parse_dict_header(pat.sub('', s_auth, count=1))
+
+            # Consume content and release the original connection
+            # to allow our new request to reuse the same one.
+            r.content
+            r.close()
+            prep = r.request.copy()
+            extract_cookies_to_jar(prep._cookies, r.request, r.raw)
+            prep.prepare_cookies(prep._cookies)
+
+            prep.headers['Authorization'] = self.build_digest_header(
+                prep.method, prep.url)
+            _r = r.connection.send(prep, **kwargs)
+            _r.history.append(r)
+            _r.request = prep
+
+            return _r
+
+        self._thread_local.num_401_calls = 1
+        return r
+
+    def __call__(self, r):
+        # Initialize per-thread state, if needed
+        self.init_per_thread_state()
+        # If we have a saved nonce, skip the 401
+        if self._thread_local.last_nonce:
+            r.headers['Authorization'] = self.build_digest_header(r.method, r.url)
+        try:
+            self._thread_local.pos = r.body.tell()
+        except AttributeError:
+            # In the case of HTTPDigestAuth being reused and the body of
+            # the previous request was a file-like object, pos has the
+            # file position of the previous body. Ensure it's set to
+            # None.
+            self._thread_local.pos = None
+        r.register_hook('response', self.handle_401)
+        r.register_hook('response', self.handle_redirect)
+        self._thread_local.num_401_calls = 1
+
+        return r
+
+    def __eq__(self, other):
+        return all([
+            self.username == getattr(other, 'username', None),
+            self.password == getattr(other, 'password', None)
+        ])
+
+    def __ne__(self, other):
+        return not self == other
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/certs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/certs.py
new file mode 100644
index 00000000..06a594e5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/certs.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+requests.certs
+~~~~~~~~~~~~~~
+
+This module returns the preferred default CA certificate bundle. There is
+only one — the one from the certifi package.
+
+If you are packaging Requests, e.g., for a Linux distribution or a managed
+environment, you can change the definition of where() to return a separately
+packaged CA bundle.
+"""
+from pip._vendor.certifi import where
+
+if __name__ == '__main__':
+    print(where())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/compat.py
new file mode 100644
index 00000000..6a86893d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/compat.py
@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.compat
+~~~~~~~~~~~~~~~
+
+This module handles import compatibility issues between Python 2 and
+Python 3.
+"""
+
+from pip._vendor import chardet
+
+import sys
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+is_py2 = (_ver[0] == 2)
+
+#: Python 3.x?
+is_py3 = (_ver[0] == 3)
+
+# Note: We've patched out simplejson support in pip because it prevents
+#       upgrading simplejson on Windows.
+# try:
+#     import simplejson as json
+# except (ImportError, SyntaxError):
+#     # simplejson does not support Python 3.2, it throws a SyntaxError
+#     # because of u'...' Unicode literals.
+import json
+
+# ---------
+# Specifics
+# ---------
+
+if is_py2:
+    from urllib import (
+        quote, unquote, quote_plus, unquote_plus, urlencode, getproxies,
+        proxy_bypass, proxy_bypass_environment, getproxies_environment)
+    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urldefrag
+    from urllib2 import parse_http_list
+    import cookielib
+    from Cookie import Morsel
+    from StringIO import StringIO
+    from collections import Callable, Mapping, MutableMapping, OrderedDict
+
+
+    builtin_str = str
+    bytes = str
+    str = unicode
+    basestring = basestring
+    numeric_types = (int, long, float)
+    integer_types = (int, long)
+
+elif is_py3:
+    from urllib.parse import urlparse, urlunparse, urljoin, urlsplit, urlencode, quote, unquote, quote_plus, unquote_plus, urldefrag
+    from urllib.request import parse_http_list, getproxies, proxy_bypass, proxy_bypass_environment, getproxies_environment
+    from http import cookiejar as cookielib
+    from http.cookies import Morsel
+    from io import StringIO
+    from collections import OrderedDict
+    from collections.abc import Callable, Mapping, MutableMapping
+
+    builtin_str = str
+    str = str
+    bytes = bytes
+    basestring = (str, bytes)
+    numeric_types = (int, float)
+    integer_types = (int,)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/cookies.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/cookies.py
new file mode 100644
index 00000000..56fccd9c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/cookies.py
@@ -0,0 +1,549 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.cookies
+~~~~~~~~~~~~~~~~
+
+Compatibility code to be able to use `cookielib.CookieJar` with requests.
+
+requests.utils imports from here, so be careful with imports.
+"""
+
+import copy
+import time
+import calendar
+
+from ._internal_utils import to_native_string
+from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping
+
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading
+
+
+class MockRequest(object):
+    """Wraps a `requests.Request` to mimic a `urllib2.Request`.
+
+    The code in `cookielib.CookieJar` expects this interface in order to correctly
+    manage cookie policies, i.e., determine whether a cookie can be set, given the
+    domains of the request and the cookie.
+
+    The original request object is read-only. The client is responsible for collecting
+    the new headers via `get_new_headers()` and interpreting them appropriately. You
+    probably want `get_cookie_header`, defined below.
+    """
+
+    def __init__(self, request):
+        self._r = request
+        self._new_headers = {}
+        self.type = urlparse(self._r.url).scheme
+
+    def get_type(self):
+        return self.type
+
+    def get_host(self):
+        return urlparse(self._r.url).netloc
+
+    def get_origin_req_host(self):
+        return self.get_host()
+
+    def get_full_url(self):
+        # Only return the response's URL if the user hadn't set the Host
+        # header
+        if not self._r.headers.get('Host'):
+            return self._r.url
+        # If they did set it, retrieve it and reconstruct the expected domain
+        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
+        parsed = urlparse(self._r.url)
+        # Reconstruct the URL as we expect it
+        return urlunparse([
+            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
+            parsed.fragment
+        ])
+
+    def is_unverifiable(self):
+        return True
+
+    def has_header(self, name):
+        return name in self._r.headers or name in self._new_headers
+
+    def get_header(self, name, default=None):
+        return self._r.headers.get(name, self._new_headers.get(name, default))
+
+    def add_header(self, key, val):
+        """cookielib has no legitimate use for this method; add it back if you find one."""
+        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
+
+    def add_unredirected_header(self, name, value):
+        self._new_headers[name] = value
+
+    def get_new_headers(self):
+        return self._new_headers
+
+    @property
+    def unverifiable(self):
+        return self.is_unverifiable()
+
+    @property
+    def origin_req_host(self):
+        return self.get_origin_req_host()
+
+    @property
+    def host(self):
+        return self.get_host()
+
+
+class MockResponse(object):
+    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
+
+    ...what? Basically, expose the parsed HTTP headers from the server response
+    the way `cookielib` expects to see them.
+    """
+
+    def __init__(self, headers):
+        """Make a MockResponse for `cookielib` to read.
+
+        :param headers: a httplib.HTTPMessage or analogous carrying the headers
+        """
+        self._headers = headers
+
+    def info(self):
+        return self._headers
+
+    def getheaders(self, name):
+        self._headers.getheaders(name)
+
+
+def extract_cookies_to_jar(jar, request, response):
+    """Extract the cookies from the response into a CookieJar.
+
+    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
+    :param request: our own requests.Request object
+    :param response: urllib3.HTTPResponse object
+    """
+    if not (hasattr(response, '_original_response') and
+            response._original_response):
+        return
+    # the _original_response field is the wrapped httplib.HTTPResponse object,
+    req = MockRequest(request)
+    # pull out the HTTPMessage with the headers and put it in the mock:
+    res = MockResponse(response._original_response.msg)
+    jar.extract_cookies(res, req)
+
+
+def get_cookie_header(jar, request):
+    """
+    Produce an appropriate Cookie header string to be sent with `request`, or None.
+
+    :rtype: str
+    """
+    r = MockRequest(request)
+    jar.add_cookie_header(r)
+    return r.get_new_headers().get('Cookie')
+
+
+def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
+    """Unsets a cookie by name, by default over all domains and paths.
+
+    Wraps CookieJar.clear(), is O(n).
+    """
+    clearables = []
+    for cookie in cookiejar:
+        if cookie.name != name:
+            continue
+        if domain is not None and domain != cookie.domain:
+            continue
+        if path is not None and path != cookie.path:
+            continue
+        clearables.append((cookie.domain, cookie.path, cookie.name))
+
+    for domain, path, name in clearables:
+        cookiejar.clear(domain, path, name)
+
+
+class CookieConflictError(RuntimeError):
+    """There are two cookies that meet the criteria specified in the cookie jar.
+    Use .get and .set and include domain and path args in order to be more specific.
+    """
+
+
+class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
+    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
+    interface.
+
+    This is the CookieJar we create by default for requests and sessions that
+    don't specify one, since some clients may expect response.cookies and
+    session.cookies to support dict operations.
+
+    Requests does not use the dict interface internally; it's just for
+    compatibility with external client code. All requests code should work
+    out of the box with externally provided instances of ``CookieJar``, e.g.
+    ``LWPCookieJar`` and ``FileCookieJar``.
+
+    Unlike a regular CookieJar, this class is pickleable.
+
+    .. warning:: dictionary operations that are normally O(1) may be O(n).
+    """
+
+    def get(self, name, default=None, domain=None, path=None):
+        """Dict-like get() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        try:
+            return self._find_no_duplicates(name, domain, path)
+        except KeyError:
+            return default
+
+    def set(self, name, value, **kwargs):
+        """Dict-like set() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+        """
+        # support client code that unsets cookies by assignment of a None value:
+        if value is None:
+            remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
+            return
+
+        if isinstance(value, Morsel):
+            c = morsel_to_cookie(value)
+        else:
+            c = create_cookie(name, value, **kwargs)
+        self.set_cookie(c)
+        return c
+
+    def iterkeys(self):
+        """Dict-like iterkeys() that returns an iterator of names of cookies
+        from the jar.
+
+        .. seealso:: itervalues() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.name
+
+    def keys(self):
+        """Dict-like keys() that returns a list of names of cookies from the
+        jar.
+
+        .. seealso:: values() and items().
+        """
+        return list(self.iterkeys())
+
+    def itervalues(self):
+        """Dict-like itervalues() that returns an iterator of values of cookies
+        from the jar.
+
+        .. seealso:: iterkeys() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.value
+
+    def values(self):
+        """Dict-like values() that returns a list of values of cookies from the
+        jar.
+
+        .. seealso:: keys() and items().
+        """
+        return list(self.itervalues())
+
+    def iteritems(self):
+        """Dict-like iteritems() that returns an iterator of name-value tuples
+        from the jar.
+
+        .. seealso:: iterkeys() and itervalues().
+        """
+        for cookie in iter(self):
+            yield cookie.name, cookie.value
+
+    def items(self):
+        """Dict-like items() that returns a list of name-value tuples from the
+        jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
+        vanilla python dict of key value pairs.
+
+        .. seealso:: keys() and values().
+        """
+        return list(self.iteritems())
+
+    def list_domains(self):
+        """Utility method to list all the domains in the jar."""
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain not in domains:
+                domains.append(cookie.domain)
+        return domains
+
+    def list_paths(self):
+        """Utility method to list all the paths in the jar."""
+        paths = []
+        for cookie in iter(self):
+            if cookie.path not in paths:
+                paths.append(cookie.path)
+        return paths
+
+    def multiple_domains(self):
+        """Returns True if there are multiple domains in the jar.
+        Returns False otherwise.
+
+        :rtype: bool
+        """
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain is not None and cookie.domain in domains:
+                return True
+            domains.append(cookie.domain)
+        return False  # there is only one domain in jar
+
+    def get_dict(self, domain=None, path=None):
+        """Takes as an argument an optional domain and path and returns a plain
+        old Python dict of name-value pairs of cookies that meet the
+        requirements.
+
+        :rtype: dict
+        """
+        dictionary = {}
+        for cookie in iter(self):
+            if (
+                (domain is None or cookie.domain == domain) and
+                (path is None or cookie.path == path)
+            ):
+                dictionary[cookie.name] = cookie.value
+        return dictionary
+
+    def __contains__(self, name):
+        try:
+            return super(RequestsCookieJar, self).__contains__(name)
+        except CookieConflictError:
+            return True
+
+    def __getitem__(self, name):
+        """Dict-like __getitem__() for compatibility with client code. Throws
+        exception if there are more than one cookie with name. In that case,
+        use the more explicit get() method instead.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        return self._find_no_duplicates(name)
+
+    def __setitem__(self, name, value):
+        """Dict-like __setitem__ for compatibility with client code. Throws
+        exception if there is already a cookie of that name in the jar. In that
+        case, use the more explicit set() method instead.
+        """
+        self.set(name, value)
+
+    def __delitem__(self, name):
+        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
+        ``remove_cookie_by_name()``.
+        """
+        remove_cookie_by_name(self, name)
+
+    def set_cookie(self, cookie, *args, **kwargs):
+        if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
+            cookie.value = cookie.value.replace('\\"', '')
+        return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
+
+    def update(self, other):
+        """Updates this jar with cookies from another CookieJar or dict-like"""
+        if isinstance(other, cookielib.CookieJar):
+            for cookie in other:
+                self.set_cookie(copy.copy(cookie))
+        else:
+            super(RequestsCookieJar, self).update(other)
+
+    def _find(self, name, domain=None, path=None):
+        """Requests uses this method internally to get cookie values.
+
+        If there are conflicting cookies, _find arbitrarily chooses one.
+        See _find_no_duplicates if you want an exception thrown if there are
+        conflicting cookies.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :return: cookie.value
+        """
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        return cookie.value
+
+        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+
+    def _find_no_duplicates(self, name, domain=None, path=None):
+        """Both ``__get_item__`` and ``get`` call this function: it's never
+        used elsewhere in Requests.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :raises KeyError: if cookie is not found
+        :raises CookieConflictError: if there are multiple cookies
+            that match name and optionally domain and path
+        :return: cookie.value
+        """
+        toReturn = None
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
+                            raise CookieConflictError('There are multiple cookies with name, %r' % (name))
+                        toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
+
+        if toReturn:
+            return toReturn
+        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+
+    def __getstate__(self):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        state = self.__dict__.copy()
+        # remove the unpickleable RLock object
+        state.pop('_cookies_lock')
+        return state
+
+    def __setstate__(self, state):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        self.__dict__.update(state)
+        if '_cookies_lock' not in self.__dict__:
+            self._cookies_lock = threading.RLock()
+
+    def copy(self):
+        """Return a copy of this RequestsCookieJar."""
+        new_cj = RequestsCookieJar()
+        new_cj.set_policy(self.get_policy())
+        new_cj.update(self)
+        return new_cj
+
+    def get_policy(self):
+        """Return the CookiePolicy instance used."""
+        return self._policy
+
+
+def _copy_cookie_jar(jar):
+    if jar is None:
+        return None
+
+    if hasattr(jar, 'copy'):
+        # We're dealing with an instance of RequestsCookieJar
+        return jar.copy()
+    # We're dealing with a generic CookieJar instance
+    new_jar = copy.copy(jar)
+    new_jar.clear()
+    for cookie in jar:
+        new_jar.set_cookie(copy.copy(cookie))
+    return new_jar
+
+
+def create_cookie(name, value, **kwargs):
+    """Make a cookie from underspecified parameters.
+
+    By default, the pair of `name` and `value` will be set for the domain ''
+    and sent on every request (this is sometimes called a "supercookie").
+    """
+    result = {
+        'version': 0,
+        'name': name,
+        'value': value,
+        'port': None,
+        'domain': '',
+        'path': '/',
+        'secure': False,
+        'expires': None,
+        'discard': True,
+        'comment': None,
+        'comment_url': None,
+        'rest': {'HttpOnly': None},
+        'rfc2109': False,
+    }
+
+    badargs = set(kwargs) - set(result)
+    if badargs:
+        err = 'create_cookie() got unexpected keyword arguments: %s'
+        raise TypeError(err % list(badargs))
+
+    result.update(kwargs)
+    result['port_specified'] = bool(result['port'])
+    result['domain_specified'] = bool(result['domain'])
+    result['domain_initial_dot'] = result['domain'].startswith('.')
+    result['path_specified'] = bool(result['path'])
+
+    return cookielib.Cookie(**result)
+
+
+def morsel_to_cookie(morsel):
+    """Convert a Morsel object into a Cookie containing the one k/v pair."""
+
+    expires = None
+    if morsel['max-age']:
+        try:
+            expires = int(time.time() + int(morsel['max-age']))
+        except ValueError:
+            raise TypeError('max-age: %s must be integer' % morsel['max-age'])
+    elif morsel['expires']:
+        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
+        expires = calendar.timegm(
+            time.strptime(morsel['expires'], time_template)
+        )
+    return create_cookie(
+        comment=morsel['comment'],
+        comment_url=bool(morsel['comment']),
+        discard=False,
+        domain=morsel['domain'],
+        expires=expires,
+        name=morsel.key,
+        path=morsel['path'],
+        port=None,
+        rest={'HttpOnly': morsel['httponly']},
+        rfc2109=False,
+        secure=bool(morsel['secure']),
+        value=morsel.value,
+        version=morsel['version'] or 0,
+    )
+
+
+def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :param cookiejar: (optional) A cookiejar to add the cookies to.
+    :param overwrite: (optional) If False, will not replace cookies
+        already in the jar with new ones.
+    :rtype: CookieJar
+    """
+    if cookiejar is None:
+        cookiejar = RequestsCookieJar()
+
+    if cookie_dict is not None:
+        names_from_jar = [cookie.name for cookie in cookiejar]
+        for name in cookie_dict:
+            if overwrite or (name not in names_from_jar):
+                cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
+
+    return cookiejar
+
+
+def merge_cookies(cookiejar, cookies):
+    """Add cookies to cookiejar and returns a merged CookieJar.
+
+    :param cookiejar: CookieJar object to add the cookies to.
+    :param cookies: Dictionary or CookieJar object to be added.
+    :rtype: CookieJar
+    """
+    if not isinstance(cookiejar, cookielib.CookieJar):
+        raise ValueError('You can only merge into CookieJar')
+
+    if isinstance(cookies, dict):
+        cookiejar = cookiejar_from_dict(
+            cookies, cookiejar=cookiejar, overwrite=False)
+    elif isinstance(cookies, cookielib.CookieJar):
+        try:
+            cookiejar.update(cookies)
+        except AttributeError:
+            for cookie_in_jar in cookies:
+                cookiejar.set_cookie(cookie_in_jar)
+
+    return cookiejar
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/exceptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/exceptions.py
new file mode 100644
index 00000000..a91e1fd1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/exceptions.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.exceptions
+~~~~~~~~~~~~~~~~~~~
+
+This module contains the set of Requests' exceptions.
+"""
+from pip._vendor.urllib3.exceptions import HTTPError as BaseHTTPError
+
+
+class RequestException(IOError):
+    """There was an ambiguous exception that occurred while handling your
+    request.
+    """
+
+    def __init__(self, *args, **kwargs):
+        """Initialize RequestException with `request` and `response` objects."""
+        response = kwargs.pop('response', None)
+        self.response = response
+        self.request = kwargs.pop('request', None)
+        if (response is not None and not self.request and
+                hasattr(response, 'request')):
+            self.request = self.response.request
+        super(RequestException, self).__init__(*args, **kwargs)
+
+
+class HTTPError(RequestException):
+    """An HTTP error occurred."""
+
+
+class ConnectionError(RequestException):
+    """A Connection error occurred."""
+
+
+class ProxyError(ConnectionError):
+    """A proxy error occurred."""
+
+
+class SSLError(ConnectionError):
+    """An SSL error occurred."""
+
+
+class Timeout(RequestException):
+    """The request timed out.
+
+    Catching this error will catch both
+    :exc:`~requests.exceptions.ConnectTimeout` and
+    :exc:`~requests.exceptions.ReadTimeout` errors.
+    """
+
+
+class ConnectTimeout(ConnectionError, Timeout):
+    """The request timed out while trying to connect to the remote server.
+
+    Requests that produced this error are safe to retry.
+    """
+
+
+class ReadTimeout(Timeout):
+    """The server did not send any data in the allotted amount of time."""
+
+
+class URLRequired(RequestException):
+    """A valid URL is required to make a request."""
+
+
+class TooManyRedirects(RequestException):
+    """Too many redirects."""
+
+
+class MissingSchema(RequestException, ValueError):
+    """The URL schema (e.g. http or https) is missing."""
+
+
+class InvalidSchema(RequestException, ValueError):
+    """See defaults.py for valid schemas."""
+
+
+class InvalidURL(RequestException, ValueError):
+    """The URL provided was somehow invalid."""
+
+
+class InvalidHeader(RequestException, ValueError):
+    """The header value provided was somehow invalid."""
+
+
+class InvalidProxyURL(InvalidURL):
+    """The proxy URL provided is invalid."""
+
+
+class ChunkedEncodingError(RequestException):
+    """The server declared chunked encoding but sent an invalid chunk."""
+
+
+class ContentDecodingError(RequestException, BaseHTTPError):
+    """Failed to decode response content"""
+
+
+class StreamConsumedError(RequestException, TypeError):
+    """The content for this response was already consumed"""
+
+
+class RetryError(RequestException):
+    """Custom retries logic failed"""
+
+
+class UnrewindableBodyError(RequestException):
+    """Requests encountered an error when trying to rewind a body"""
+
+# Warnings
+
+
+class RequestsWarning(Warning):
+    """Base warning for Requests."""
+    pass
+
+
+class FileModeWarning(RequestsWarning, DeprecationWarning):
+    """A file was opened in text mode, but Requests determined its binary length."""
+    pass
+
+
+class RequestsDependencyWarning(RequestsWarning):
+    """An imported dependency doesn't match the expected version range."""
+    pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/help.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/help.py
new file mode 100644
index 00000000..3c3072ba
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/help.py
@@ -0,0 +1,119 @@
+"""Module containing bug report helper(s)."""
+from __future__ import print_function
+
+import json
+import platform
+import sys
+import ssl
+
+from pip._vendor import idna
+from pip._vendor import urllib3
+from pip._vendor import chardet
+
+from . import __version__ as requests_version
+
+try:
+    from pip._vendor.urllib3.contrib import pyopenssl
+except ImportError:
+    pyopenssl = None
+    OpenSSL = None
+    cryptography = None
+else:
+    import OpenSSL
+    import cryptography
+
+
+def _implementation():
+    """Return a dict with the Python implementation and version.
+
+    Provide both the name and the version of the Python implementation
+    currently running. For example, on CPython 2.7.5 it will return
+    {'name': 'CPython', 'version': '2.7.5'}.
+
+    This function works best on CPython and PyPy: in particular, it probably
+    doesn't work for Jython or IronPython. Future investigation should be done
+    to work out the correct shape of the code for those platforms.
+    """
+    implementation = platform.python_implementation()
+
+    if implementation == 'CPython':
+        implementation_version = platform.python_version()
+    elif implementation == 'PyPy':
+        implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
+                                               sys.pypy_version_info.minor,
+                                               sys.pypy_version_info.micro)
+        if sys.pypy_version_info.releaselevel != 'final':
+            implementation_version = ''.join([
+                implementation_version, sys.pypy_version_info.releaselevel
+            ])
+    elif implementation == 'Jython':
+        implementation_version = platform.python_version()  # Complete Guess
+    elif implementation == 'IronPython':
+        implementation_version = platform.python_version()  # Complete Guess
+    else:
+        implementation_version = 'Unknown'
+
+    return {'name': implementation, 'version': implementation_version}
+
+
+def info():
+    """Generate information for a bug report."""
+    try:
+        platform_info = {
+            'system': platform.system(),
+            'release': platform.release(),
+        }
+    except IOError:
+        platform_info = {
+            'system': 'Unknown',
+            'release': 'Unknown',
+        }
+
+    implementation_info = _implementation()
+    urllib3_info = {'version': urllib3.__version__}
+    chardet_info = {'version': chardet.__version__}
+
+    pyopenssl_info = {
+        'version': None,
+        'openssl_version': '',
+    }
+    if OpenSSL:
+        pyopenssl_info = {
+            'version': OpenSSL.__version__,
+            'openssl_version': '%x' % OpenSSL.SSL.OPENSSL_VERSION_NUMBER,
+        }
+    cryptography_info = {
+        'version': getattr(cryptography, '__version__', ''),
+    }
+    idna_info = {
+        'version': getattr(idna, '__version__', ''),
+    }
+
+    system_ssl = ssl.OPENSSL_VERSION_NUMBER
+    system_ssl_info = {
+        'version': '%x' % system_ssl if system_ssl is not None else ''
+    }
+
+    return {
+        'platform': platform_info,
+        'implementation': implementation_info,
+        'system_ssl': system_ssl_info,
+        'using_pyopenssl': pyopenssl is not None,
+        'pyOpenSSL': pyopenssl_info,
+        'urllib3': urllib3_info,
+        'chardet': chardet_info,
+        'cryptography': cryptography_info,
+        'idna': idna_info,
+        'requests': {
+            'version': requests_version,
+        },
+    }
+
+
+def main():
+    """Pretty-print the bug information as JSON."""
+    print(json.dumps(info(), sort_keys=True, indent=2))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/hooks.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/hooks.py
new file mode 100644
index 00000000..7a51f212
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/hooks.py
@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.hooks
+~~~~~~~~~~~~~~
+
+This module provides the capabilities for the Requests hooks system.
+
+Available hooks:
+
+``response``:
+    The response generated from a Request.
+"""
+HOOKS = ['response']
+
+
+def default_hooks():
+    return {event: [] for event in HOOKS}
+
+# TODO: response is the only one
+
+
+def dispatch_hook(key, hooks, hook_data, **kwargs):
+    """Dispatches a hook dictionary on a given piece of data."""
+    hooks = hooks or {}
+    hooks = hooks.get(key)
+    if hooks:
+        if hasattr(hooks, '__call__'):
+            hooks = [hooks]
+        for hook in hooks:
+            _hook_data = hook(hook_data, **kwargs)
+            if _hook_data is not None:
+                hook_data = _hook_data
+    return hook_data
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/models.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/models.py
new file mode 100644
index 00000000..08399574
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/models.py
@@ -0,0 +1,953 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.models
+~~~~~~~~~~~~~~~
+
+This module contains the primary objects that power Requests.
+"""
+
+import datetime
+import sys
+
+# Import encoding now, to avoid implicit import later.
+# Implicit import within threads may cause LookupError when standard library is in a ZIP,
+# such as in Embedded Python. See https://github.com/requests/requests/issues/3578.
+import encodings.idna
+
+from pip._vendor.urllib3.fields import RequestField
+from pip._vendor.urllib3.filepost import encode_multipart_formdata
+from pip._vendor.urllib3.util import parse_url
+from pip._vendor.urllib3.exceptions import (
+    DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
+
+from io import UnsupportedOperation
+from .hooks import default_hooks
+from .structures import CaseInsensitiveDict
+
+from .auth import HTTPBasicAuth
+from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
+from .exceptions import (
+    HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
+    ContentDecodingError, ConnectionError, StreamConsumedError)
+from ._internal_utils import to_native_string, unicode_is_ascii
+from .utils import (
+    guess_filename, get_auth_from_url, requote_uri,
+    stream_decode_response_unicode, to_key_val_list, parse_header_links,
+    iter_slices, guess_json_utf, super_len, check_header_validity)
+from .compat import (
+    Callable, Mapping,
+    cookielib, urlunparse, urlsplit, urlencode, str, bytes,
+    is_py2, chardet, builtin_str, basestring)
+from .compat import json as complexjson
+from .status_codes import codes
+
+#: The set of HTTP status codes that indicate an automatically
+#: processable redirect.
+REDIRECT_STATI = (
+    codes.moved,               # 301
+    codes.found,               # 302
+    codes.other,               # 303
+    codes.temporary_redirect,  # 307
+    codes.permanent_redirect,  # 308
+)
+
+DEFAULT_REDIRECT_LIMIT = 30
+CONTENT_CHUNK_SIZE = 10 * 1024
+ITER_CHUNK_SIZE = 512
+
+
+class RequestEncodingMixin(object):
+    @property
+    def path_url(self):
+        """Build the path URL to use."""
+
+        url = []
+
+        p = urlsplit(self.url)
+
+        path = p.path
+        if not path:
+            path = '/'
+
+        url.append(path)
+
+        query = p.query
+        if query:
+            url.append('?')
+            url.append(query)
+
+        return ''.join(url)
+
+    @staticmethod
+    def _encode_params(data):
+        """Encode parameters in a piece of data.
+
+        Will successfully encode parameters when passed as a dict or a list of
+        2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
+        if parameters are supplied as a dict.
+        """
+
+        if isinstance(data, (str, bytes)):
+            return data
+        elif hasattr(data, 'read'):
+            return data
+        elif hasattr(data, '__iter__'):
+            result = []
+            for k, vs in to_key_val_list(data):
+                if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
+                    vs = [vs]
+                for v in vs:
+                    if v is not None:
+                        result.append(
+                            (k.encode('utf-8') if isinstance(k, str) else k,
+                             v.encode('utf-8') if isinstance(v, str) else v))
+            return urlencode(result, doseq=True)
+        else:
+            return data
+
+    @staticmethod
+    def _encode_files(files, data):
+        """Build the body for a multipart/form-data request.
+
+        Will successfully encode files when passed as a dict or a list of
+        tuples. Order is retained if data is a list of tuples but arbitrary
+        if parameters are supplied as a dict.
+        The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
+        or 4-tuples (filename, fileobj, contentype, custom_headers).
+        """
+        if (not files):
+            raise ValueError("Files must be provided.")
+        elif isinstance(data, basestring):
+            raise ValueError("Data must not be a string.")
+
+        new_fields = []
+        fields = to_key_val_list(data or {})
+        files = to_key_val_list(files or {})
+
+        for field, val in fields:
+            if isinstance(val, basestring) or not hasattr(val, '__iter__'):
+                val = [val]
+            for v in val:
+                if v is not None:
+                    # Don't call str() on bytestrings: in Py3 it all goes wrong.
+                    if not isinstance(v, bytes):
+                        v = str(v)
+
+                    new_fields.append(
+                        (field.decode('utf-8') if isinstance(field, bytes) else field,
+                         v.encode('utf-8') if isinstance(v, str) else v))
+
+        for (k, v) in files:
+            # support for explicit filename
+            ft = None
+            fh = None
+            if isinstance(v, (tuple, list)):
+                if len(v) == 2:
+                    fn, fp = v
+                elif len(v) == 3:
+                    fn, fp, ft = v
+                else:
+                    fn, fp, ft, fh = v
+            else:
+                fn = guess_filename(v) or k
+                fp = v
+
+            if isinstance(fp, (str, bytes, bytearray)):
+                fdata = fp
+            elif hasattr(fp, 'read'):
+                fdata = fp.read()
+            elif fp is None:
+                continue
+            else:
+                fdata = fp
+
+            rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
+            rf.make_multipart(content_type=ft)
+            new_fields.append(rf)
+
+        body, content_type = encode_multipart_formdata(new_fields)
+
+        return body, content_type
+
+
+class RequestHooksMixin(object):
+    def register_hook(self, event, hook):
+        """Properly register a hook."""
+
+        if event not in self.hooks:
+            raise ValueError('Unsupported event specified, with event name "%s"' % (event))
+
+        if isinstance(hook, Callable):
+            self.hooks[event].append(hook)
+        elif hasattr(hook, '__iter__'):
+            self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
+
+    def deregister_hook(self, event, hook):
+        """Deregister a previously registered hook.
+        Returns True if the hook existed, False if not.
+        """
+
+        try:
+            self.hooks[event].remove(hook)
+            return True
+        except ValueError:
+            return False
+
+
+class Request(RequestHooksMixin):
+    """A user-created :class:`Request <Request>` object.
+
+    Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
+
+    :param method: HTTP method to use.
+    :param url: URL to send.
+    :param headers: dictionary of headers to send.
+    :param files: dictionary of {filename: fileobject} files to multipart upload.
+    :param data: the body to attach to the request. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param json: json for the body to attach to the request (if files or data is not specified).
+    :param params: URL parameters to append to the URL. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param auth: Auth handler or (user, pass) tuple.
+    :param cookies: dictionary or CookieJar of cookies to attach to this request.
+    :param hooks: dictionary of callback hooks, for internal usage.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> req.prepare()
+      <PreparedRequest [GET]>
+    """
+
+    def __init__(self,
+            method=None, url=None, headers=None, files=None, data=None,
+            params=None, auth=None, cookies=None, hooks=None, json=None):
+
+        # Default empty dicts for dict params.
+        data = [] if data is None else data
+        files = [] if files is None else files
+        headers = {} if headers is None else headers
+        params = {} if params is None else params
+        hooks = {} if hooks is None else hooks
+
+        self.hooks = default_hooks()
+        for (k, v) in list(hooks.items()):
+            self.register_hook(event=k, hook=v)
+
+        self.method = method
+        self.url = url
+        self.headers = headers
+        self.files = files
+        self.data = data
+        self.json = json
+        self.params = params
+        self.auth = auth
+        self.cookies = cookies
+
+    def __repr__(self):
+        return '<Request [%s]>' % (self.method)
+
+    def prepare(self):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
+        p = PreparedRequest()
+        p.prepare(
+            method=self.method,
+            url=self.url,
+            headers=self.headers,
+            files=self.files,
+            data=self.data,
+            json=self.json,
+            params=self.params,
+            auth=self.auth,
+            cookies=self.cookies,
+            hooks=self.hooks,
+        )
+        return p
+
+
+class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
+    """The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
+    containing the exact bytes that will be sent to the server.
+
+    Generated from either a :class:`Request <Request>` object or manually.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> r = req.prepare()
+      <PreparedRequest [GET]>
+
+      >>> s = requests.Session()
+      >>> s.send(r)
+      <Response [200]>
+    """
+
+    def __init__(self):
+        #: HTTP verb to send to the server.
+        self.method = None
+        #: HTTP URL to send the request to.
+        self.url = None
+        #: dictionary of HTTP headers.
+        self.headers = None
+        # The `CookieJar` used to create the Cookie header will be stored here
+        # after prepare_cookies is called
+        self._cookies = None
+        #: request body to send to the server.
+        self.body = None
+        #: dictionary of callback hooks, for internal usage.
+        self.hooks = default_hooks()
+        #: integer denoting starting position of a readable file-like body.
+        self._body_position = None
+
+    def prepare(self,
+            method=None, url=None, headers=None, files=None, data=None,
+            params=None, auth=None, cookies=None, hooks=None, json=None):
+        """Prepares the entire request with the given parameters."""
+
+        self.prepare_method(method)
+        self.prepare_url(url, params)
+        self.prepare_headers(headers)
+        self.prepare_cookies(cookies)
+        self.prepare_body(data, files, json)
+        self.prepare_auth(auth, url)
+
+        # Note that prepare_auth must be last to enable authentication schemes
+        # such as OAuth to work on a fully prepared request.
+
+        # This MUST go after prepare_auth. Authenticators could add a hook
+        self.prepare_hooks(hooks)
+
+    def __repr__(self):
+        return '<PreparedRequest [%s]>' % (self.method)
+
+    def copy(self):
+        p = PreparedRequest()
+        p.method = self.method
+        p.url = self.url
+        p.headers = self.headers.copy() if self.headers is not None else None
+        p._cookies = _copy_cookie_jar(self._cookies)
+        p.body = self.body
+        p.hooks = self.hooks
+        p._body_position = self._body_position
+        return p
+
+    def prepare_method(self, method):
+        """Prepares the given HTTP method."""
+        self.method = method
+        if self.method is not None:
+            self.method = to_native_string(self.method.upper())
+
+    @staticmethod
+    def _get_idna_encoded_host(host):
+        from pip._vendor import idna
+
+        try:
+            host = idna.encode(host, uts46=True).decode('utf-8')
+        except idna.IDNAError:
+            raise UnicodeError
+        return host
+
+    def prepare_url(self, url, params):
+        """Prepares the given HTTP URL."""
+        #: Accept objects that have string representations.
+        #: We're unable to blindly call unicode/str functions
+        #: as this will include the bytestring indicator (b'')
+        #: on python 3.x.
+        #: https://github.com/requests/requests/pull/2238
+        if isinstance(url, bytes):
+            url = url.decode('utf8')
+        else:
+            url = unicode(url) if is_py2 else str(url)
+
+        # Remove leading whitespaces from url
+        url = url.lstrip()
+
+        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
+        # `data` etc to work around exceptions from `url_parse`, which
+        # handles RFC 3986 only.
+        if ':' in url and not url.lower().startswith('http'):
+            self.url = url
+            return
+
+        # Support for unicode domain names and paths.
+        try:
+            scheme, auth, host, port, path, query, fragment = parse_url(url)
+        except LocationParseError as e:
+            raise InvalidURL(*e.args)
+
+        if not scheme:
+            error = ("Invalid URL {0!r}: No schema supplied. Perhaps you meant http://{0}?")
+            error = error.format(to_native_string(url, 'utf8'))
+
+            raise MissingSchema(error)
+
+        if not host:
+            raise InvalidURL("Invalid URL %r: No host supplied" % url)
+
+        # In general, we want to try IDNA encoding the hostname if the string contains
+        # non-ASCII characters. This allows users to automatically get the correct IDNA
+        # behaviour. For strings containing only ASCII characters, we need to also verify
+        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.
+        if not unicode_is_ascii(host):
+            try:
+                host = self._get_idna_encoded_host(host)
+            except UnicodeError:
+                raise InvalidURL('URL has an invalid label.')
+        elif host.startswith(u'*'):
+            raise InvalidURL('URL has an invalid label.')
+
+        # Carefully reconstruct the network location
+        netloc = auth or ''
+        if netloc:
+            netloc += '@'
+        netloc += host
+        if port:
+            netloc += ':' + str(port)
+
+        # Bare domains aren't valid URLs.
+        if not path:
+            path = '/'
+
+        if is_py2:
+            if isinstance(scheme, str):
+                scheme = scheme.encode('utf-8')
+            if isinstance(netloc, str):
+                netloc = netloc.encode('utf-8')
+            if isinstance(path, str):
+                path = path.encode('utf-8')
+            if isinstance(query, str):
+                query = query.encode('utf-8')
+            if isinstance(fragment, str):
+                fragment = fragment.encode('utf-8')
+
+        if isinstance(params, (str, bytes)):
+            params = to_native_string(params)
+
+        enc_params = self._encode_params(params)
+        if enc_params:
+            if query:
+                query = '%s&%s' % (query, enc_params)
+            else:
+                query = enc_params
+
+        url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
+        self.url = url
+
+    def prepare_headers(self, headers):
+        """Prepares the given HTTP headers."""
+
+        self.headers = CaseInsensitiveDict()
+        if headers:
+            for header in headers.items():
+                # Raise exception on invalid header value.
+                check_header_validity(header)
+                name, value = header
+                self.headers[to_native_string(name)] = value
+
+    def prepare_body(self, data, files, json=None):
+        """Prepares the given HTTP body data."""
+
+        # Check if file, fo, generator, iterator.
+        # If not, run through normal process.
+
+        # Nottin' on you.
+        body = None
+        content_type = None
+
+        if not data and json is not None:
+            # urllib3 requires a bytes-like body. Python 2's json.dumps
+            # provides this natively, but Python 3 gives a Unicode string.
+            content_type = 'application/json'
+            body = complexjson.dumps(json)
+            if not isinstance(body, bytes):
+                body = body.encode('utf-8')
+
+        is_stream = all([
+            hasattr(data, '__iter__'),
+            not isinstance(data, (basestring, list, tuple, Mapping))
+        ])
+
+        try:
+            length = super_len(data)
+        except (TypeError, AttributeError, UnsupportedOperation):
+            length = None
+
+        if is_stream:
+            body = data
+
+            if getattr(body, 'tell', None) is not None:
+                # Record the current file position before reading.
+                # This will allow us to rewind a file in the event
+                # of a redirect.
+                try:
+                    self._body_position = body.tell()
+                except (IOError, OSError):
+                    # This differentiates from None, allowing us to catch
+                    # a failed `tell()` later when trying to rewind the body
+                    self._body_position = object()
+
+            if files:
+                raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
+
+            if length:
+                self.headers['Content-Length'] = builtin_str(length)
+            else:
+                self.headers['Transfer-Encoding'] = 'chunked'
+        else:
+            # Multi-part file uploads.
+            if files:
+                (body, content_type) = self._encode_files(files, data)
+            else:
+                if data:
+                    body = self._encode_params(data)
+                    if isinstance(data, basestring) or hasattr(data, 'read'):
+                        content_type = None
+                    else:
+                        content_type = 'application/x-www-form-urlencoded'
+
+            self.prepare_content_length(body)
+
+            # Add content-type if it wasn't explicitly provided.
+            if content_type and ('content-type' not in self.headers):
+                self.headers['Content-Type'] = content_type
+
+        self.body = body
+
+    def prepare_content_length(self, body):
+        """Prepare Content-Length header based on request method and body"""
+        if body is not None:
+            length = super_len(body)
+            if length:
+                # If length exists, set it. Otherwise, we fallback
+                # to Transfer-Encoding: chunked.
+                self.headers['Content-Length'] = builtin_str(length)
+        elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
+            # Set Content-Length to 0 for methods that can have a body
+            # but don't provide one. (i.e. not GET or HEAD)
+            self.headers['Content-Length'] = '0'
+
+    def prepare_auth(self, auth, url=''):
+        """Prepares the given HTTP auth data."""
+
+        # If no Auth is explicitly provided, extract it from the URL first.
+        if auth is None:
+            url_auth = get_auth_from_url(self.url)
+            auth = url_auth if any(url_auth) else None
+
+        if auth:
+            if isinstance(auth, tuple) and len(auth) == 2:
+                # special-case basic HTTP auth
+                auth = HTTPBasicAuth(*auth)
+
+            # Allow auth to make its changes.
+            r = auth(self)
+
+            # Update self to reflect the auth changes.
+            self.__dict__.update(r.__dict__)
+
+            # Recompute Content-Length
+            self.prepare_content_length(self.body)
+
+    def prepare_cookies(self, cookies):
+        """Prepares the given HTTP cookie data.
+
+        This function eventually generates a ``Cookie`` header from the
+        given cookies using cookielib. Due to cookielib's design, the header
+        will not be regenerated if it already exists, meaning this function
+        can only be called once for the life of the
+        :class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
+        to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
+        header is removed beforehand.
+        """
+        if isinstance(cookies, cookielib.CookieJar):
+            self._cookies = cookies
+        else:
+            self._cookies = cookiejar_from_dict(cookies)
+
+        cookie_header = get_cookie_header(self._cookies, self)
+        if cookie_header is not None:
+            self.headers['Cookie'] = cookie_header
+
+    def prepare_hooks(self, hooks):
+        """Prepares the given hooks."""
+        # hooks can be passed as None to the prepare method and to this
+        # method. To prevent iterating over None, simply use an empty list
+        # if hooks is False-y
+        hooks = hooks or []
+        for event in hooks:
+            self.register_hook(event, hooks[event])
+
+
+class Response(object):
+    """The :class:`Response <Response>` object, which contains a
+    server's response to an HTTP request.
+    """
+
+    __attrs__ = [
+        '_content', 'status_code', 'headers', 'url', 'history',
+        'encoding', 'reason', 'cookies', 'elapsed', 'request'
+    ]
+
+    def __init__(self):
+        self._content = False
+        self._content_consumed = False
+        self._next = None
+
+        #: Integer Code of responded HTTP Status, e.g. 404 or 200.
+        self.status_code = None
+
+        #: Case-insensitive Dictionary of Response Headers.
+        #: For example, ``headers['content-encoding']`` will return the
+        #: value of a ``'Content-Encoding'`` response header.
+        self.headers = CaseInsensitiveDict()
+
+        #: File-like object representation of response (for advanced usage).
+        #: Use of ``raw`` requires that ``stream=True`` be set on the request.
+        # This requirement does not apply for use internally to Requests.
+        self.raw = None
+
+        #: Final URL location of Response.
+        self.url = None
+
+        #: Encoding to decode with when accessing r.text.
+        self.encoding = None
+
+        #: A list of :class:`Response <Response>` objects from
+        #: the history of the Request. Any redirect responses will end
+        #: up here. The list is sorted from the oldest to the most recent request.
+        self.history = []
+
+        #: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
+        self.reason = None
+
+        #: A CookieJar of Cookies the server sent back.
+        self.cookies = cookiejar_from_dict({})
+
+        #: The amount of time elapsed between sending the request
+        #: and the arrival of the response (as a timedelta).
+        #: This property specifically measures the time taken between sending
+        #: the first byte of the request and finishing parsing the headers. It
+        #: is therefore unaffected by consuming the response content or the
+        #: value of the ``stream`` keyword argument.
+        self.elapsed = datetime.timedelta(0)
+
+        #: The :class:`PreparedRequest <PreparedRequest>` object to which this
+        #: is a response.
+        self.request = None
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def __getstate__(self):
+        # Consume everything; accessing the content attribute makes
+        # sure the content has been fully read.
+        if not self._content_consumed:
+            self.content
+
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        for name, value in state.items():
+            setattr(self, name, value)
+
+        # pickled objects do not have .raw
+        setattr(self, '_content_consumed', True)
+        setattr(self, 'raw', None)
+
+    def __repr__(self):
+        return '<Response [%s]>' % (self.status_code)
+
+    def __bool__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __nonzero__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __iter__(self):
+        """Allows you to use a response as an iterator."""
+        return self.iter_content(128)
+
+    @property
+    def ok(self):
+        """Returns True if :attr:`status_code` is less than 400, False if not.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        try:
+            self.raise_for_status()
+        except HTTPError:
+            return False
+        return True
+
+    @property
+    def is_redirect(self):
+        """True if this Response is a well-formed HTTP redirect that could have
+        been processed automatically (by :meth:`Session.resolve_redirects`).
+        """
+        return ('location' in self.headers and self.status_code in REDIRECT_STATI)
+
+    @property
+    def is_permanent_redirect(self):
+        """True if this Response one of the permanent versions of redirect."""
+        return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
+
+    @property
+    def next(self):
+        """Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
+        return self._next
+
+    @property
+    def apparent_encoding(self):
+        """The apparent encoding, provided by the chardet library."""
+        return chardet.detect(self.content)['encoding']
+
+    def iter_content(self, chunk_size=1, decode_unicode=False):
+        """Iterates over the response data.  When stream=True is set on the
+        request, this avoids reading the content at once into memory for
+        large responses.  The chunk size is the number of bytes it should
+        read into memory.  This is not necessarily the length of each item
+        returned as decoding can take place.
+
+        chunk_size must be of type int or None. A value of None will
+        function differently depending on the value of `stream`.
+        stream=True will read data as it arrives in whatever size the
+        chunks are received. If stream=False, data is returned as
+        a single chunk.
+
+        If decode_unicode is True, content will be decoded using the best
+        available encoding based on the response.
+        """
+
+        def generate():
+            # Special case for urllib3.
+            if hasattr(self.raw, 'stream'):
+                try:
+                    for chunk in self.raw.stream(chunk_size, decode_content=True):
+                        yield chunk
+                except ProtocolError as e:
+                    raise ChunkedEncodingError(e)
+                except DecodeError as e:
+                    raise ContentDecodingError(e)
+                except ReadTimeoutError as e:
+                    raise ConnectionError(e)
+            else:
+                # Standard file-like object.
+                while True:
+                    chunk = self.raw.read(chunk_size)
+                    if not chunk:
+                        break
+                    yield chunk
+
+            self._content_consumed = True
+
+        if self._content_consumed and isinstance(self._content, bool):
+            raise StreamConsumedError()
+        elif chunk_size is not None and not isinstance(chunk_size, int):
+            raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
+        # simulate reading small chunks of the content
+        reused_chunks = iter_slices(self._content, chunk_size)
+
+        stream_chunks = generate()
+
+        chunks = reused_chunks if self._content_consumed else stream_chunks
+
+        if decode_unicode:
+            chunks = stream_decode_response_unicode(chunks, self)
+
+        return chunks
+
+    def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
+        """Iterates over the response data, one line at a time.  When
+        stream=True is set on the request, this avoids reading the
+        content at once into memory for large responses.
+
+        .. note:: This method is not reentrant safe.
+        """
+
+        pending = None
+
+        for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
+
+            if pending is not None:
+                chunk = pending + chunk
+
+            if delimiter:
+                lines = chunk.split(delimiter)
+            else:
+                lines = chunk.splitlines()
+
+            if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
+                pending = lines.pop()
+            else:
+                pending = None
+
+            for line in lines:
+                yield line
+
+        if pending is not None:
+            yield pending
+
+    @property
+    def content(self):
+        """Content of the response, in bytes."""
+
+        if self._content is False:
+            # Read the contents.
+            if self._content_consumed:
+                raise RuntimeError(
+                    'The content for this response was already consumed')
+
+            if self.status_code == 0 or self.raw is None:
+                self._content = None
+            else:
+                self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
+
+        self._content_consumed = True
+        # don't need to release the connection; that's been handled by urllib3
+        # since we exhausted the data.
+        return self._content
+
+    @property
+    def text(self):
+        """Content of the response, in unicode.
+
+        If Response.encoding is None, encoding will be guessed using
+        ``chardet``.
+
+        The encoding of the response content is determined based solely on HTTP
+        headers, following RFC 2616 to the letter. If you can take advantage of
+        non-HTTP knowledge to make a better guess at the encoding, you should
+        set ``r.encoding`` appropriately before accessing this property.
+        """
+
+        # Try charset from content-type
+        content = None
+        encoding = self.encoding
+
+        if not self.content:
+            return str('')
+
+        # Fallback to auto-detected encoding.
+        if self.encoding is None:
+            encoding = self.apparent_encoding
+
+        # Decode unicode from given encoding.
+        try:
+            content = str(self.content, encoding, errors='replace')
+        except (LookupError, TypeError):
+            # A LookupError is raised if the encoding was not found which could
+            # indicate a misspelling or similar mistake.
+            #
+            # A TypeError can be raised if encoding is None
+            #
+            # So we try blindly encoding.
+            content = str(self.content, errors='replace')
+
+        return content
+
+    def json(self, **kwargs):
+        r"""Returns the json-encoded content of a response, if any.
+
+        :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
+        :raises ValueError: If the response body does not contain valid json.
+        """
+
+        if not self.encoding and self.content and len(self.content) > 3:
+            # No encoding set. JSON RFC 4627 section 3 states we should expect
+            # UTF-8, -16 or -32. Detect which one to use; If the detection or
+            # decoding fails, fall back to `self.text` (using chardet to make
+            # a best guess).
+            encoding = guess_json_utf(self.content)
+            if encoding is not None:
+                try:
+                    return complexjson.loads(
+                        self.content.decode(encoding), **kwargs
+                    )
+                except UnicodeDecodeError:
+                    # Wrong UTF codec detected; usually because it's not UTF-8
+                    # but some other 8-bit codec.  This is an RFC violation,
+                    # and the server didn't bother to tell us what codec *was*
+                    # used.
+                    pass
+        return complexjson.loads(self.text, **kwargs)
+
+    @property
+    def links(self):
+        """Returns the parsed header links of the response, if any."""
+
+        header = self.headers.get('link')
+
+        # l = MultiDict()
+        l = {}
+
+        if header:
+            links = parse_header_links(header)
+
+            for link in links:
+                key = link.get('rel') or link.get('url')
+                l[key] = link
+
+        return l
+
+    def raise_for_status(self):
+        """Raises stored :class:`HTTPError`, if one occurred."""
+
+        http_error_msg = ''
+        if isinstance(self.reason, bytes):
+            # We attempt to decode utf-8 first because some servers
+            # choose to localize their reason strings. If the string
+            # isn't utf-8, we fall back to iso-8859-1 for all other
+            # encodings. (See PR #3538)
+            try:
+                reason = self.reason.decode('utf-8')
+            except UnicodeDecodeError:
+                reason = self.reason.decode('iso-8859-1')
+        else:
+            reason = self.reason
+
+        if 400 <= self.status_code < 500:
+            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
+
+        elif 500 <= self.status_code < 600:
+            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
+
+        if http_error_msg:
+            raise HTTPError(http_error_msg, response=self)
+
+    def close(self):
+        """Releases the connection back to the pool. Once this method has been
+        called the underlying ``raw`` object must not be accessed again.
+
+        *Note: Should not normally need to be called explicitly.*
+        """
+        if not self._content_consumed:
+            self.raw.close()
+
+        release_conn = getattr(self.raw, 'release_conn', None)
+        if release_conn is not None:
+            release_conn()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/packages.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/packages.py
new file mode 100644
index 00000000..9582fa73
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/packages.py
@@ -0,0 +1,16 @@
+import sys
+
+# This code exists for backwards compatibility reasons.
+# I don't like it either. Just look the other way. :)
+
+for package in ('urllib3', 'idna', 'chardet'):
+    vendored_package = "pip._vendor." + package
+    locals()[package] = __import__(vendored_package)
+    # This traversal is apparently necessary such that the identities are
+    # preserved (requests.packages.urllib3.* is urllib3.*)
+    for mod in list(sys.modules):
+        if mod == vendored_package or mod.startswith(vendored_package + '.'):
+            unprefixed_mod = mod[len("pip._vendor."):]
+            sys.modules['pip._vendor.requests.packages.' + unprefixed_mod] = sys.modules[mod]
+
+# Kinda cool, though, right?
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/sessions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/sessions.py
new file mode 100644
index 00000000..d73d700f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/sessions.py
@@ -0,0 +1,770 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.session
+~~~~~~~~~~~~~~~~
+
+This module provides a Session object to manage and persist settings across
+requests (cookies, auth, proxies).
+"""
+import os
+import sys
+import time
+from datetime import timedelta
+
+from .auth import _basic_auth_str
+from .compat import cookielib, is_py3, OrderedDict, urljoin, urlparse, Mapping
+from .cookies import (
+    cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
+from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
+from .hooks import default_hooks, dispatch_hook
+from ._internal_utils import to_native_string
+from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
+from .exceptions import (
+    TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
+
+from .structures import CaseInsensitiveDict
+from .adapters import HTTPAdapter
+
+from .utils import (
+    requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
+    get_auth_from_url, rewind_body
+)
+
+from .status_codes import codes
+
+# formerly defined here, reexposed here for backward compatibility
+from .models import REDIRECT_STATI
+
+# Preferred clock, based on which one is more accurate on a given system.
+if sys.platform == 'win32':
+    try:  # Python 3.4+
+        preferred_clock = time.perf_counter
+    except AttributeError:  # Earlier than Python 3.
+        preferred_clock = time.clock
+else:
+    preferred_clock = time.time
+
+
+def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
+    """Determines appropriate setting for a given request, taking into account
+    the explicit setting on that request, and the setting in the session. If a
+    setting is a dictionary, they will be merged together using `dict_class`
+    """
+
+    if session_setting is None:
+        return request_setting
+
+    if request_setting is None:
+        return session_setting
+
+    # Bypass if not a dictionary (e.g. verify)
+    if not (
+            isinstance(session_setting, Mapping) and
+            isinstance(request_setting, Mapping)
+    ):
+        return request_setting
+
+    merged_setting = dict_class(to_key_val_list(session_setting))
+    merged_setting.update(to_key_val_list(request_setting))
+
+    # Remove keys that are set to None. Extract keys first to avoid altering
+    # the dictionary during iteration.
+    none_keys = [k for (k, v) in merged_setting.items() if v is None]
+    for key in none_keys:
+        del merged_setting[key]
+
+    return merged_setting
+
+
+def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
+    """Properly merges both requests and session hooks.
+
+    This is necessary because when request_hooks == {'response': []}, the
+    merge breaks Session hooks entirely.
+    """
+    if session_hooks is None or session_hooks.get('response') == []:
+        return request_hooks
+
+    if request_hooks is None or request_hooks.get('response') == []:
+        return session_hooks
+
+    return merge_setting(request_hooks, session_hooks, dict_class)
+
+
+class SessionRedirectMixin(object):
+
+    def get_redirect_target(self, resp):
+        """Receives a Response. Returns a redirect URI or ``None``"""
+        # Due to the nature of how requests processes redirects this method will
+        # be called at least once upon the original response and at least twice
+        # on each subsequent redirect response (if any).
+        # If a custom mixin is used to handle this logic, it may be advantageous
+        # to cache the redirect location onto the response object as a private
+        # attribute.
+        if resp.is_redirect:
+            location = resp.headers['location']
+            # Currently the underlying http module on py3 decode headers
+            # in latin1, but empirical evidence suggests that latin1 is very
+            # rarely used with non-ASCII characters in HTTP headers.
+            # It is more likely to get UTF8 header rather than latin1.
+            # This causes incorrect handling of UTF8 encoded location headers.
+            # To solve this, we re-encode the location in latin1.
+            if is_py3:
+                location = location.encode('latin1')
+            return to_native_string(location, 'utf8')
+        return None
+
+    def should_strip_auth(self, old_url, new_url):
+        """Decide whether Authorization header should be removed when redirecting"""
+        old_parsed = urlparse(old_url)
+        new_parsed = urlparse(new_url)
+        if old_parsed.hostname != new_parsed.hostname:
+            return True
+        # Special case: allow http -> https redirect when using the standard
+        # ports. This isn't specified by RFC 7235, but is kept to avoid
+        # breaking backwards compatibility with older versions of requests
+        # that allowed any redirects on the same host.
+        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
+                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
+            return False
+
+        # Handle default port usage corresponding to scheme.
+        changed_port = old_parsed.port != new_parsed.port
+        changed_scheme = old_parsed.scheme != new_parsed.scheme
+        default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
+        if (not changed_scheme and old_parsed.port in default_port
+                and new_parsed.port in default_port):
+            return False
+
+        # Standard case: root URI must match
+        return changed_port or changed_scheme
+
+    def resolve_redirects(self, resp, req, stream=False, timeout=None,
+                          verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
+        """Receives a Response. Returns a generator of Responses or Requests."""
+
+        hist = []  # keep track of history
+
+        url = self.get_redirect_target(resp)
+        previous_fragment = urlparse(req.url).fragment
+        while url:
+            prepared_request = req.copy()
+
+            # Update history and keep track of redirects.
+            # resp.history must ignore the original request in this loop
+            hist.append(resp)
+            resp.history = hist[1:]
+
+            try:
+                resp.content  # Consume socket so it can be released
+            except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
+                resp.raw.read(decode_content=False)
+
+            if len(resp.history) >= self.max_redirects:
+                raise TooManyRedirects('Exceeded %s redirects.' % self.max_redirects, response=resp)
+
+            # Release the connection back into the pool.
+            resp.close()
+
+            # Handle redirection without scheme (see: RFC 1808 Section 4)
+            if url.startswith('//'):
+                parsed_rurl = urlparse(resp.url)
+                url = '%s:%s' % (to_native_string(parsed_rurl.scheme), url)
+
+            # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
+            parsed = urlparse(url)
+            if parsed.fragment == '' and previous_fragment:
+                parsed = parsed._replace(fragment=previous_fragment)
+            elif parsed.fragment:
+                previous_fragment = parsed.fragment
+            url = parsed.geturl()
+
+            # Facilitate relative 'location' headers, as allowed by RFC 7231.
+            # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
+            # Compliant with RFC3986, we percent encode the url.
+            if not parsed.netloc:
+                url = urljoin(resp.url, requote_uri(url))
+            else:
+                url = requote_uri(url)
+
+            prepared_request.url = to_native_string(url)
+
+            self.rebuild_method(prepared_request, resp)
+
+            # https://github.com/requests/requests/issues/1084
+            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
+                # https://github.com/requests/requests/issues/3490
+                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
+                for header in purged_headers:
+                    prepared_request.headers.pop(header, None)
+                prepared_request.body = None
+
+            headers = prepared_request.headers
+            try:
+                del headers['Cookie']
+            except KeyError:
+                pass
+
+            # Extract any cookies sent on the response to the cookiejar
+            # in the new request. Because we've mutated our copied prepared
+            # request, use the old one that we haven't yet touched.
+            extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
+            merge_cookies(prepared_request._cookies, self.cookies)
+            prepared_request.prepare_cookies(prepared_request._cookies)
+
+            # Rebuild auth and proxy information.
+            proxies = self.rebuild_proxies(prepared_request, proxies)
+            self.rebuild_auth(prepared_request, resp)
+
+            # A failed tell() sets `_body_position` to `object()`. This non-None
+            # value ensures `rewindable` will be True, allowing us to raise an
+            # UnrewindableBodyError, instead of hanging the connection.
+            rewindable = (
+                prepared_request._body_position is not None and
+                ('Content-Length' in headers or 'Transfer-Encoding' in headers)
+            )
+
+            # Attempt to rewind consumed file-like object.
+            if rewindable:
+                rewind_body(prepared_request)
+
+            # Override the original request.
+            req = prepared_request
+
+            if yield_requests:
+                yield req
+            else:
+
+                resp = self.send(
+                    req,
+                    stream=stream,
+                    timeout=timeout,
+                    verify=verify,
+                    cert=cert,
+                    proxies=proxies,
+                    allow_redirects=False,
+                    **adapter_kwargs
+                )
+
+                extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
+
+                # extract redirect url, if any, for the next loop
+                url = self.get_redirect_target(resp)
+                yield resp
+
+    def rebuild_auth(self, prepared_request, response):
+        """When being redirected we may want to strip authentication from the
+        request to avoid leaking credentials. This method intelligently removes
+        and reapplies authentication where possible to avoid credential loss.
+        """
+        headers = prepared_request.headers
+        url = prepared_request.url
+
+        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
+            # If we get redirected to a new host, we should strip out any
+            # authentication headers.
+            del headers['Authorization']
+
+        # .netrc might have more auth for us on our new host.
+        new_auth = get_netrc_auth(url) if self.trust_env else None
+        if new_auth is not None:
+            prepared_request.prepare_auth(new_auth)
+
+        return
+
+    def rebuild_proxies(self, prepared_request, proxies):
+        """This method re-evaluates the proxy configuration by considering the
+        environment variables. If we are redirected to a URL covered by
+        NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
+        proxy keys for this URL (in case they were stripped by a previous
+        redirect).
+
+        This method also replaces the Proxy-Authorization header where
+        necessary.
+
+        :rtype: dict
+        """
+        proxies = proxies if proxies is not None else {}
+        headers = prepared_request.headers
+        url = prepared_request.url
+        scheme = urlparse(url).scheme
+        new_proxies = proxies.copy()
+        no_proxy = proxies.get('no_proxy')
+
+        bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
+        if self.trust_env and not bypass_proxy:
+            environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+
+            proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
+
+            if proxy:
+                new_proxies.setdefault(scheme, proxy)
+
+        if 'Proxy-Authorization' in headers:
+            del headers['Proxy-Authorization']
+
+        try:
+            username, password = get_auth_from_url(new_proxies[scheme])
+        except KeyError:
+            username, password = None, None
+
+        if username and password:
+            headers['Proxy-Authorization'] = _basic_auth_str(username, password)
+
+        return new_proxies
+
+    def rebuild_method(self, prepared_request, response):
+        """When being redirected we may want to change the method of the request
+        based on certain specs or browser behavior.
+        """
+        method = prepared_request.method
+
+        # https://tools.ietf.org/html/rfc7231#section-6.4.4
+        if response.status_code == codes.see_other and method != 'HEAD':
+            method = 'GET'
+
+        # Do what the browsers do, despite standards...
+        # First, turn 302s into GETs.
+        if response.status_code == codes.found and method != 'HEAD':
+            method = 'GET'
+
+        # Second, if a POST is responded to with a 301, turn it into a GET.
+        # This bizarre behaviour is explained in Issue 1704.
+        if response.status_code == codes.moved and method == 'POST':
+            method = 'GET'
+
+        prepared_request.method = method
+
+
+class Session(SessionRedirectMixin):
+    """A Requests session.
+
+    Provides cookie persistence, connection-pooling, and configuration.
+
+    Basic Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> s.get('https://httpbin.org/get')
+      <Response [200]>
+
+    Or as a context manager::
+
+      >>> with requests.Session() as s:
+      >>>     s.get('https://httpbin.org/get')
+      <Response [200]>
+    """
+
+    __attrs__ = [
+        'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
+        'cert', 'prefetch', 'adapters', 'stream', 'trust_env',
+        'max_redirects',
+    ]
+
+    def __init__(self):
+
+        #: A case-insensitive dictionary of headers to be sent on each
+        #: :class:`Request <Request>` sent from this
+        #: :class:`Session <Session>`.
+        self.headers = default_headers()
+
+        #: Default Authentication tuple or object to attach to
+        #: :class:`Request <Request>`.
+        self.auth = None
+
+        #: Dictionary mapping protocol or protocol and host to the URL of the proxy
+        #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
+        #: be used on each :class:`Request <Request>`.
+        self.proxies = {}
+
+        #: Event-handling hooks.
+        self.hooks = default_hooks()
+
+        #: Dictionary of querystring data to attach to each
+        #: :class:`Request <Request>`. The dictionary values may be lists for
+        #: representing multivalued query parameters.
+        self.params = {}
+
+        #: Stream response content default.
+        self.stream = False
+
+        #: SSL Verification default.
+        self.verify = True
+
+        #: SSL client certificate default, if String, path to ssl client
+        #: cert file (.pem). If Tuple, ('cert', 'key') pair.
+        self.cert = None
+
+        #: Maximum number of redirects allowed. If the request exceeds this
+        #: limit, a :class:`TooManyRedirects` exception is raised.
+        #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
+        #: 30.
+        self.max_redirects = DEFAULT_REDIRECT_LIMIT
+
+        #: Trust environment settings for proxy configuration, default
+        #: authentication and similar.
+        self.trust_env = True
+
+        #: A CookieJar containing all currently outstanding cookies set on this
+        #: session. By default it is a
+        #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
+        #: may be any other ``cookielib.CookieJar`` compatible object.
+        self.cookies = cookiejar_from_dict({})
+
+        # Default connection adapters.
+        self.adapters = OrderedDict()
+        self.mount('https://', HTTPAdapter())
+        self.mount('http://', HTTPAdapter())
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def prepare_request(self, request):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for
+        transmission and returns it. The :class:`PreparedRequest` has settings
+        merged from the :class:`Request <Request>` instance and those of the
+        :class:`Session`.
+
+        :param request: :class:`Request` instance to prepare with this
+            session's settings.
+        :rtype: requests.PreparedRequest
+        """
+        cookies = request.cookies or {}
+
+        # Bootstrap CookieJar.
+        if not isinstance(cookies, cookielib.CookieJar):
+            cookies = cookiejar_from_dict(cookies)
+
+        # Merge with session cookies
+        merged_cookies = merge_cookies(
+            merge_cookies(RequestsCookieJar(), self.cookies), cookies)
+
+        # Set environment's basic authentication if not explicitly set.
+        auth = request.auth
+        if self.trust_env and not auth and not self.auth:
+            auth = get_netrc_auth(request.url)
+
+        p = PreparedRequest()
+        p.prepare(
+            method=request.method.upper(),
+            url=request.url,
+            files=request.files,
+            data=request.data,
+            json=request.json,
+            headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
+            params=merge_setting(request.params, self.params),
+            auth=merge_setting(auth, self.auth),
+            cookies=merged_cookies,
+            hooks=merge_hooks(request.hooks, self.hooks),
+        )
+        return p
+
+    def request(self, method, url,
+            params=None, data=None, headers=None, cookies=None, files=None,
+            auth=None, timeout=None, allow_redirects=True, proxies=None,
+            hooks=None, stream=None, verify=None, cert=None, json=None):
+        """Constructs a :class:`Request <Request>`, prepares it and sends it.
+        Returns :class:`Response <Response>` object.
+
+        :param method: method for the new :class:`Request` object.
+        :param url: URL for the new :class:`Request` object.
+        :param params: (optional) Dictionary or bytes to be sent in the query
+            string for the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the
+            :class:`Request`.
+        :param headers: (optional) Dictionary of HTTP Headers to send with the
+            :class:`Request`.
+        :param cookies: (optional) Dict or CookieJar object to send with the
+            :class:`Request`.
+        :param files: (optional) Dictionary of ``'filename': file-like-objects``
+            for multipart encoding upload.
+        :param auth: (optional) Auth tuple or callable to enable
+            Basic/Digest/Custom HTTP Auth.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param allow_redirects: (optional) Set to True by default.
+        :type allow_redirects: bool
+        :param proxies: (optional) Dictionary mapping protocol or protocol and
+            hostname to the URL of the proxy.
+        :param stream: (optional) whether to immediately download the response
+            content. Defaults to ``False``.
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``.
+        :param cert: (optional) if String, path to ssl client cert file (.pem).
+            If Tuple, ('cert', 'key') pair.
+        :rtype: requests.Response
+        """
+        # Create the Request.
+        req = Request(
+            method=method.upper(),
+            url=url,
+            headers=headers,
+            files=files,
+            data=data or {},
+            json=json,
+            params=params or {},
+            auth=auth,
+            cookies=cookies,
+            hooks=hooks,
+        )
+        prep = self.prepare_request(req)
+
+        proxies = proxies or {}
+
+        settings = self.merge_environment_settings(
+            prep.url, proxies, stream, verify, cert
+        )
+
+        # Send the request.
+        send_kwargs = {
+            'timeout': timeout,
+            'allow_redirects': allow_redirects,
+        }
+        send_kwargs.update(settings)
+        resp = self.send(prep, **send_kwargs)
+
+        return resp
+
+    def get(self, url, **kwargs):
+        r"""Sends a GET request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', True)
+        return self.request('GET', url, **kwargs)
+
+    def options(self, url, **kwargs):
+        r"""Sends a OPTIONS request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', True)
+        return self.request('OPTIONS', url, **kwargs)
+
+    def head(self, url, **kwargs):
+        r"""Sends a HEAD request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', False)
+        return self.request('HEAD', url, **kwargs)
+
+    def post(self, url, data=None, json=None, **kwargs):
+        r"""Sends a POST request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('POST', url, data=data, json=json, **kwargs)
+
+    def put(self, url, data=None, **kwargs):
+        r"""Sends a PUT request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('PUT', url, data=data, **kwargs)
+
+    def patch(self, url, data=None, **kwargs):
+        r"""Sends a PATCH request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('PATCH', url, data=data, **kwargs)
+
+    def delete(self, url, **kwargs):
+        r"""Sends a DELETE request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('DELETE', url, **kwargs)
+
+    def send(self, request, **kwargs):
+        """Send a given PreparedRequest.
+
+        :rtype: requests.Response
+        """
+        # Set defaults that the hooks can utilize to ensure they always have
+        # the correct parameters to reproduce the previous request.
+        kwargs.setdefault('stream', self.stream)
+        kwargs.setdefault('verify', self.verify)
+        kwargs.setdefault('cert', self.cert)
+        kwargs.setdefault('proxies', self.proxies)
+
+        # It's possible that users might accidentally send a Request object.
+        # Guard against that specific failure case.
+        if isinstance(request, Request):
+            raise ValueError('You can only send PreparedRequests.')
+
+        # Set up variables needed for resolve_redirects and dispatching of hooks
+        allow_redirects = kwargs.pop('allow_redirects', True)
+        stream = kwargs.get('stream')
+        hooks = request.hooks
+
+        # Get the appropriate adapter to use
+        adapter = self.get_adapter(url=request.url)
+
+        # Start time (approximately) of the request
+        start = preferred_clock()
+
+        # Send the request
+        r = adapter.send(request, **kwargs)
+
+        # Total elapsed time of the request (approximately)
+        elapsed = preferred_clock() - start
+        r.elapsed = timedelta(seconds=elapsed)
+
+        # Response manipulation hooks
+        r = dispatch_hook('response', hooks, r, **kwargs)
+
+        # Persist cookies
+        if r.history:
+
+            # If the hooks create history then we want those cookies too
+            for resp in r.history:
+                extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
+
+        extract_cookies_to_jar(self.cookies, request, r.raw)
+
+        # Redirect resolving generator.
+        gen = self.resolve_redirects(r, request, **kwargs)
+
+        # Resolve redirects if allowed.
+        history = [resp for resp in gen] if allow_redirects else []
+
+        # Shuffle things around if there's history.
+        if history:
+            # Insert the first (original) request at the start
+            history.insert(0, r)
+            # Get the last request made
+            r = history.pop()
+            r.history = history
+
+        # If redirects aren't being followed, store the response on the Request for Response.next().
+        if not allow_redirects:
+            try:
+                r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
+            except StopIteration:
+                pass
+
+        if not stream:
+            r.content
+
+        return r
+
+    def merge_environment_settings(self, url, proxies, stream, verify, cert):
+        """
+        Check the environment and merge it with some settings.
+
+        :rtype: dict
+        """
+        # Gather clues from the surrounding environment.
+        if self.trust_env:
+            # Set environment's proxies.
+            no_proxy = proxies.get('no_proxy') if proxies is not None else None
+            env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+            for (k, v) in env_proxies.items():
+                proxies.setdefault(k, v)
+
+            # Look for requests environment configuration and be compatible
+            # with cURL.
+            if verify is True or verify is None:
+                verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
+                          os.environ.get('CURL_CA_BUNDLE'))
+
+        # Merge all the kwargs.
+        proxies = merge_setting(proxies, self.proxies)
+        stream = merge_setting(stream, self.stream)
+        verify = merge_setting(verify, self.verify)
+        cert = merge_setting(cert, self.cert)
+
+        return {'verify': verify, 'proxies': proxies, 'stream': stream,
+                'cert': cert}
+
+    def get_adapter(self, url):
+        """
+        Returns the appropriate connection adapter for the given URL.
+
+        :rtype: requests.adapters.BaseAdapter
+        """
+        for (prefix, adapter) in self.adapters.items():
+
+            if url.lower().startswith(prefix.lower()):
+                return adapter
+
+        # Nothing matches :-/
+        raise InvalidSchema("No connection adapters were found for '%s'" % url)
+
+    def close(self):
+        """Closes all adapters and as such the session"""
+        for v in self.adapters.values():
+            v.close()
+
+    def mount(self, prefix, adapter):
+        """Registers a connection adapter to a prefix.
+
+        Adapters are sorted in descending order by prefix length.
+        """
+        self.adapters[prefix] = adapter
+        keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
+
+        for key in keys_to_move:
+            self.adapters[key] = self.adapters.pop(key)
+
+    def __getstate__(self):
+        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
+        return state
+
+    def __setstate__(self, state):
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+
+def session():
+    """
+    Returns a :class:`Session` for context-management.
+
+    .. deprecated:: 1.0.0
+
+        This method has been deprecated since version 1.0.0 and is only kept for
+        backwards compatibility. New code should use :class:`~requests.sessions.Session`
+        to create a session. This may be removed at a future date.
+
+    :rtype: Session
+    """
+    return Session()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/status_codes.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/status_codes.py
new file mode 100644
index 00000000..813e8c4e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/status_codes.py
@@ -0,0 +1,120 @@
+# -*- coding: utf-8 -*-
+
+r"""
+The ``codes`` object defines a mapping from common names for HTTP statuses
+to their numerical codes, accessible either as attributes or as dictionary
+items.
+
+>>> requests.codes['temporary_redirect']
+307
+>>> requests.codes.teapot
+418
+>>> requests.codes['\o/']
+200
+
+Some codes have multiple names, and both upper- and lower-case versions of
+the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
+``codes.okay`` all correspond to the HTTP status code 200.
+"""
+
+from .structures import LookupDict
+
+_codes = {
+
+    # Informational.
+    100: ('continue',),
+    101: ('switching_protocols',),
+    102: ('processing',),
+    103: ('checkpoint',),
+    122: ('uri_too_long', 'request_uri_too_long'),
+    200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
+    201: ('created',),
+    202: ('accepted',),
+    203: ('non_authoritative_info', 'non_authoritative_information'),
+    204: ('no_content',),
+    205: ('reset_content', 'reset'),
+    206: ('partial_content', 'partial'),
+    207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
+    208: ('already_reported',),
+    226: ('im_used',),
+
+    # Redirection.
+    300: ('multiple_choices',),
+    301: ('moved_permanently', 'moved', '\\o-'),
+    302: ('found',),
+    303: ('see_other', 'other'),
+    304: ('not_modified',),
+    305: ('use_proxy',),
+    306: ('switch_proxy',),
+    307: ('temporary_redirect', 'temporary_moved', 'temporary'),
+    308: ('permanent_redirect',
+          'resume_incomplete', 'resume',),  # These 2 to be removed in 3.0
+
+    # Client Error.
+    400: ('bad_request', 'bad'),
+    401: ('unauthorized',),
+    402: ('payment_required', 'payment'),
+    403: ('forbidden',),
+    404: ('not_found', '-o-'),
+    405: ('method_not_allowed', 'not_allowed'),
+    406: ('not_acceptable',),
+    407: ('proxy_authentication_required', 'proxy_auth', 'proxy_authentication'),
+    408: ('request_timeout', 'timeout'),
+    409: ('conflict',),
+    410: ('gone',),
+    411: ('length_required',),
+    412: ('precondition_failed', 'precondition'),
+    413: ('request_entity_too_large',),
+    414: ('request_uri_too_large',),
+    415: ('unsupported_media_type', 'unsupported_media', 'media_type'),
+    416: ('requested_range_not_satisfiable', 'requested_range', 'range_not_satisfiable'),
+    417: ('expectation_failed',),
+    418: ('im_a_teapot', 'teapot', 'i_am_a_teapot'),
+    421: ('misdirected_request',),
+    422: ('unprocessable_entity', 'unprocessable'),
+    423: ('locked',),
+    424: ('failed_dependency', 'dependency'),
+    425: ('unordered_collection', 'unordered'),
+    426: ('upgrade_required', 'upgrade'),
+    428: ('precondition_required', 'precondition'),
+    429: ('too_many_requests', 'too_many'),
+    431: ('header_fields_too_large', 'fields_too_large'),
+    444: ('no_response', 'none'),
+    449: ('retry_with', 'retry'),
+    450: ('blocked_by_windows_parental_controls', 'parental_controls'),
+    451: ('unavailable_for_legal_reasons', 'legal_reasons'),
+    499: ('client_closed_request',),
+
+    # Server Error.
+    500: ('internal_server_error', 'server_error', '/o\\', '✗'),
+    501: ('not_implemented',),
+    502: ('bad_gateway',),
+    503: ('service_unavailable', 'unavailable'),
+    504: ('gateway_timeout',),
+    505: ('http_version_not_supported', 'http_version'),
+    506: ('variant_also_negotiates',),
+    507: ('insufficient_storage',),
+    509: ('bandwidth_limit_exceeded', 'bandwidth'),
+    510: ('not_extended',),
+    511: ('network_authentication_required', 'network_auth', 'network_authentication'),
+}
+
+codes = LookupDict(name='status_codes')
+
+def _init():
+    for code, titles in _codes.items():
+        for title in titles:
+            setattr(codes, title, code)
+            if not title.startswith(('\\', '/')):
+                setattr(codes, title.upper(), code)
+
+    def doc(code):
+        names = ', '.join('``%s``' % n for n in _codes[code])
+        return '* %d: %s' % (code, names)
+
+    global __doc__
+    __doc__ = (__doc__ + '\n' +
+               '\n'.join(doc(code) for code in sorted(_codes))
+               if __doc__ is not None else None)
+
+_init()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/structures.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/structures.py
new file mode 100644
index 00000000..da930e28
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/structures.py
@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.structures
+~~~~~~~~~~~~~~~~~~~
+
+Data structures that power Requests.
+"""
+
+from .compat import OrderedDict, Mapping, MutableMapping
+
+
+class CaseInsensitiveDict(MutableMapping):
+    """A case-insensitive ``dict``-like object.
+
+    Implements all methods and operations of
+    ``MutableMapping`` as well as dict's ``copy``. Also
+    provides ``lower_items``.
+
+    All keys are expected to be strings. The structure remembers the
+    case of the last key to be set, and ``iter(instance)``,
+    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
+    will contain case-sensitive keys. However, querying and contains
+    testing is case insensitive::
+
+        cid = CaseInsensitiveDict()
+        cid['Accept'] = 'application/json'
+        cid['aCCEPT'] == 'application/json'  # True
+        list(cid) == ['Accept']  # True
+
+    For example, ``headers['content-encoding']`` will return the
+    value of a ``'Content-Encoding'`` response header, regardless
+    of how the header name was originally stored.
+
+    If the constructor, ``.update``, or equality comparison
+    operations are given keys that have equal ``.lower()``s, the
+    behavior is undefined.
+    """
+
+    def __init__(self, data=None, **kwargs):
+        self._store = OrderedDict()
+        if data is None:
+            data = {}
+        self.update(data, **kwargs)
+
+    def __setitem__(self, key, value):
+        # Use the lowercased key for lookups, but store the actual
+        # key alongside the value.
+        self._store[key.lower()] = (key, value)
+
+    def __getitem__(self, key):
+        return self._store[key.lower()][1]
+
+    def __delitem__(self, key):
+        del self._store[key.lower()]
+
+    def __iter__(self):
+        return (casedkey for casedkey, mappedvalue in self._store.values())
+
+    def __len__(self):
+        return len(self._store)
+
+    def lower_items(self):
+        """Like iteritems(), but with all lowercase keys."""
+        return (
+            (lowerkey, keyval[1])
+            for (lowerkey, keyval)
+            in self._store.items()
+        )
+
+    def __eq__(self, other):
+        if isinstance(other, Mapping):
+            other = CaseInsensitiveDict(other)
+        else:
+            return NotImplemented
+        # Compare insensitively
+        return dict(self.lower_items()) == dict(other.lower_items())
+
+    # Copy is required
+    def copy(self):
+        return CaseInsensitiveDict(self._store.values())
+
+    def __repr__(self):
+        return str(dict(self.items()))
+
+
+class LookupDict(dict):
+    """Dictionary lookup object."""
+
+    def __init__(self, name=None):
+        self.name = name
+        super(LookupDict, self).__init__()
+
+    def __repr__(self):
+        return '<lookup \'%s\'>' % (self.name)
+
+    def __getitem__(self, key):
+        # We allow fall-through here, so values default to None
+
+        return self.__dict__.get(key, None)
+
+    def get(self, key, default=None):
+        return self.__dict__.get(key, default)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/utils.py
new file mode 100644
index 00000000..8170a8d2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/requests/utils.py
@@ -0,0 +1,977 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.utils
+~~~~~~~~~~~~~~
+
+This module provides utility functions that are used within Requests
+that are also useful for external consumption.
+"""
+
+import codecs
+import contextlib
+import io
+import os
+import re
+import socket
+import struct
+import sys
+import tempfile
+import warnings
+import zipfile
+
+from .__version__ import __version__
+from . import certs
+# to_native_string is unused here, but imported here for backwards compatibility
+from ._internal_utils import to_native_string
+from .compat import parse_http_list as _parse_list_header
+from .compat import (
+    quote, urlparse, bytes, str, OrderedDict, unquote, getproxies,
+    proxy_bypass, urlunparse, basestring, integer_types, is_py3,
+    proxy_bypass_environment, getproxies_environment, Mapping)
+from .cookies import cookiejar_from_dict
+from .structures import CaseInsensitiveDict
+from .exceptions import (
+    InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
+
+NETRC_FILES = ('.netrc', '_netrc')
+
+DEFAULT_CA_BUNDLE_PATH = certs.where()
+
+DEFAULT_PORTS = {'http': 80, 'https': 443}
+
+
+if sys.platform == 'win32':
+    # provide a proxy_bypass version on Windows without DNS lookups
+
+    def proxy_bypass_registry(host):
+        try:
+            if is_py3:
+                import winreg
+            else:
+                import _winreg as winreg
+        except ImportError:
+            return False
+
+        try:
+            internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER,
+                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
+            # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
+            proxyEnable = int(winreg.QueryValueEx(internetSettings,
+                                              'ProxyEnable')[0])
+            # ProxyOverride is almost always a string
+            proxyOverride = winreg.QueryValueEx(internetSettings,
+                                                'ProxyOverride')[0]
+        except OSError:
+            return False
+        if not proxyEnable or not proxyOverride:
+            return False
+
+        # make a check value list from the registry entry: replace the
+        # '<local>' string by the localhost entry and the corresponding
+        # canonical entry.
+        proxyOverride = proxyOverride.split(';')
+        # now check if we match one of the registry values.
+        for test in proxyOverride:
+            if test == '<local>':
+                if '.' not in host:
+                    return True
+            test = test.replace(".", r"\.")     # mask dots
+            test = test.replace("*", r".*")     # change glob sequence
+            test = test.replace("?", r".")      # change glob char
+            if re.match(test, host, re.I):
+                return True
+        return False
+
+    def proxy_bypass(host):  # noqa
+        """Return True, if the host should be bypassed.
+
+        Checks proxy settings gathered from the environment, if specified,
+        or the registry.
+        """
+        if getproxies_environment():
+            return proxy_bypass_environment(host)
+        else:
+            return proxy_bypass_registry(host)
+
+
+def dict_to_sequence(d):
+    """Returns an internal sequence dictionary update."""
+
+    if hasattr(d, 'items'):
+        d = d.items()
+
+    return d
+
+
+def super_len(o):
+    total_length = None
+    current_position = 0
+
+    if hasattr(o, '__len__'):
+        total_length = len(o)
+
+    elif hasattr(o, 'len'):
+        total_length = o.len
+
+    elif hasattr(o, 'fileno'):
+        try:
+            fileno = o.fileno()
+        except io.UnsupportedOperation:
+            pass
+        else:
+            total_length = os.fstat(fileno).st_size
+
+            # Having used fstat to determine the file length, we need to
+            # confirm that this file was opened up in binary mode.
+            if 'b' not in o.mode:
+                warnings.warn((
+                    "Requests has determined the content-length for this "
+                    "request using the binary size of the file: however, the "
+                    "file has been opened in text mode (i.e. without the 'b' "
+                    "flag in the mode). This may lead to an incorrect "
+                    "content-length. In Requests 3.0, support will be removed "
+                    "for files in text mode."),
+                    FileModeWarning
+                )
+
+    if hasattr(o, 'tell'):
+        try:
+            current_position = o.tell()
+        except (OSError, IOError):
+            # This can happen in some weird situations, such as when the file
+            # is actually a special file descriptor like stdin. In this
+            # instance, we don't know what the length is, so set it to zero and
+            # let requests chunk it instead.
+            if total_length is not None:
+                current_position = total_length
+        else:
+            if hasattr(o, 'seek') and total_length is None:
+                # StringIO and BytesIO have seek but no useable fileno
+                try:
+                    # seek to end of file
+                    o.seek(0, 2)
+                    total_length = o.tell()
+
+                    # seek back to current position to support
+                    # partially read file-like objects
+                    o.seek(current_position or 0)
+                except (OSError, IOError):
+                    total_length = 0
+
+    if total_length is None:
+        total_length = 0
+
+    return max(0, total_length - current_position)
+
+
+def get_netrc_auth(url, raise_errors=False):
+    """Returns the Requests tuple auth for a given url from netrc."""
+
+    try:
+        from netrc import netrc, NetrcParseError
+
+        netrc_path = None
+
+        for f in NETRC_FILES:
+            try:
+                loc = os.path.expanduser('~/{}'.format(f))
+            except KeyError:
+                # os.path.expanduser can fail when $HOME is undefined and
+                # getpwuid fails. See https://bugs.python.org/issue20164 &
+                # https://github.com/requests/requests/issues/1846
+                return
+
+            if os.path.exists(loc):
+                netrc_path = loc
+                break
+
+        # Abort early if there isn't one.
+        if netrc_path is None:
+            return
+
+        ri = urlparse(url)
+
+        # Strip port numbers from netloc. This weird `if...encode`` dance is
+        # used for Python 3.2, which doesn't support unicode literals.
+        splitstr = b':'
+        if isinstance(url, str):
+            splitstr = splitstr.decode('ascii')
+        host = ri.netloc.split(splitstr)[0]
+
+        try:
+            _netrc = netrc(netrc_path).authenticators(host)
+            if _netrc:
+                # Return with login / password
+                login_i = (0 if _netrc[0] else 1)
+                return (_netrc[login_i], _netrc[2])
+        except (NetrcParseError, IOError):
+            # If there was a parsing error or a permissions issue reading the file,
+            # we'll just skip netrc auth unless explicitly asked to raise errors.
+            if raise_errors:
+                raise
+
+    # AppEngine hackiness.
+    except (ImportError, AttributeError):
+        pass
+
+
+def guess_filename(obj):
+    """Tries to guess the filename of the given object."""
+    name = getattr(obj, 'name', None)
+    if (name and isinstance(name, basestring) and name[0] != '<' and
+            name[-1] != '>'):
+        return os.path.basename(name)
+
+
+def extract_zipped_paths(path):
+    """Replace nonexistent paths that look like they refer to a member of a zip
+    archive with the location of an extracted copy of the target, or else
+    just return the provided path unchanged.
+    """
+    if os.path.exists(path):
+        # this is already a valid path, no need to do anything further
+        return path
+
+    # find the first valid part of the provided path and treat that as a zip archive
+    # assume the rest of the path is the name of a member in the archive
+    archive, member = os.path.split(path)
+    while archive and not os.path.exists(archive):
+        archive, prefix = os.path.split(archive)
+        member = '/'.join([prefix, member])
+
+    if not zipfile.is_zipfile(archive):
+        return path
+
+    zip_file = zipfile.ZipFile(archive)
+    if member not in zip_file.namelist():
+        return path
+
+    # we have a valid zip archive and a valid member of that archive
+    tmp = tempfile.gettempdir()
+    extracted_path = os.path.join(tmp, *member.split('/'))
+    if not os.path.exists(extracted_path):
+        extracted_path = zip_file.extract(member, path=tmp)
+
+    return extracted_path
+
+
+def from_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. Unless it can not be represented as such, return an
+    OrderedDict, e.g.,
+
+    ::
+
+        >>> from_key_val_list([('key', 'val')])
+        OrderedDict([('key', 'val')])
+        >>> from_key_val_list('string')
+        ValueError: cannot encode objects that are not 2-tuples
+        >>> from_key_val_list({'key': 'val'})
+        OrderedDict([('key', 'val')])
+
+    :rtype: OrderedDict
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError('cannot encode objects that are not 2-tuples')
+
+    return OrderedDict(value)
+
+
+def to_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. If it can be, return a list of tuples, e.g.,
+
+    ::
+
+        >>> to_key_val_list([('key', 'val')])
+        [('key', 'val')]
+        >>> to_key_val_list({'key': 'val'})
+        [('key', 'val')]
+        >>> to_key_val_list('string')
+        ValueError: cannot encode objects that are not 2-tuples.
+
+    :rtype: list
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError('cannot encode objects that are not 2-tuples')
+
+    if isinstance(value, Mapping):
+        value = value.items()
+
+    return list(value)
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_list_header(value):
+    """Parse lists as described by RFC 2068 Section 2.
+
+    In particular, parse comma-separated lists where the elements of
+    the list may include quoted-strings.  A quoted-string could
+    contain a comma.  A non-quoted string could have quotes in the
+    middle.  Quotes are removed automatically after parsing.
+
+    It basically works like :func:`parse_set_header` just that items
+    may appear multiple times and case sensitivity is preserved.
+
+    The return value is a standard :class:`list`:
+
+    >>> parse_list_header('token, "quoted value"')
+    ['token', 'quoted value']
+
+    To create a header from the :class:`list` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a list header.
+    :return: :class:`list`
+    :rtype: list
+    """
+    result = []
+    for item in _parse_list_header(value):
+        if item[:1] == item[-1:] == '"':
+            item = unquote_header_value(item[1:-1])
+        result.append(item)
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_dict_header(value):
+    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
+    convert them into a python dict:
+
+    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
+    >>> type(d) is dict
+    True
+    >>> sorted(d.items())
+    [('bar', 'as well'), ('foo', 'is a fish')]
+
+    If there is no value for a key it will be `None`:
+
+    >>> parse_dict_header('key_without_value')
+    {'key_without_value': None}
+
+    To create a header from the :class:`dict` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a dict header.
+    :return: :class:`dict`
+    :rtype: dict
+    """
+    result = {}
+    for item in _parse_list_header(value):
+        if '=' not in item:
+            result[item] = None
+            continue
+        name, value = item.split('=', 1)
+        if value[:1] == value[-1:] == '"':
+            value = unquote_header_value(value[1:-1])
+        result[name] = value
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def unquote_header_value(value, is_filename=False):
+    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
+    This does not use the real unquoting but what browsers are actually
+    using for quoting.
+
+    :param value: the header value to unquote.
+    :rtype: str
+    """
+    if value and value[0] == value[-1] == '"':
+        # this is not the real unquoting, but fixing this so that the
+        # RFC is met will result in bugs with internet explorer and
+        # probably some other browsers as well.  IE for example is
+        # uploading files with "C:\foo\bar.txt" as filename
+        value = value[1:-1]
+
+        # if this is a filename and the starting characters look like
+        # a UNC path, then just return the value without quotes.  Using the
+        # replace sequence below on a UNC path has the effect of turning
+        # the leading double slash into a single slash and then
+        # _fix_ie_filename() doesn't work correctly.  See #458.
+        if not is_filename or value[:2] != '\\\\':
+            return value.replace('\\\\', '\\').replace('\\"', '"')
+    return value
+
+
+def dict_from_cookiejar(cj):
+    """Returns a key/value dictionary from a CookieJar.
+
+    :param cj: CookieJar object to extract cookies from.
+    :rtype: dict
+    """
+
+    cookie_dict = {}
+
+    for cookie in cj:
+        cookie_dict[cookie.name] = cookie.value
+
+    return cookie_dict
+
+
+def add_dict_to_cookiejar(cj, cookie_dict):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cj: CookieJar to insert cookies into.
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :rtype: CookieJar
+    """
+
+    return cookiejar_from_dict(cookie_dict, cj)
+
+
+def get_encodings_from_content(content):
+    """Returns encodings from given content string.
+
+    :param content: bytestring to extract encodings from.
+    """
+    warnings.warn((
+        'In requests 3.0, get_encodings_from_content will be removed. For '
+        'more information, please see the discussion on issue #2266. (This'
+        ' warning should only appear once.)'),
+        DeprecationWarning)
+
+    charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
+    pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
+    xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
+
+    return (charset_re.findall(content) +
+            pragma_re.findall(content) +
+            xml_re.findall(content))
+
+
+def _parse_content_type_header(header):
+    """Returns content type and parameters from given header
+
+    :param header: string
+    :return: tuple containing content type and dictionary of
+         parameters
+    """
+
+    tokens = header.split(';')
+    content_type, params = tokens[0].strip(), tokens[1:]
+    params_dict = {}
+    items_to_strip = "\"' "
+
+    for param in params:
+        param = param.strip()
+        if param:
+            key, value = param, True
+            index_of_equals = param.find("=")
+            if index_of_equals != -1:
+                key = param[:index_of_equals].strip(items_to_strip)
+                value = param[index_of_equals + 1:].strip(items_to_strip)
+            params_dict[key.lower()] = value
+    return content_type, params_dict
+
+
+def get_encoding_from_headers(headers):
+    """Returns encodings from given HTTP Header Dict.
+
+    :param headers: dictionary to extract encoding from.
+    :rtype: str
+    """
+
+    content_type = headers.get('content-type')
+
+    if not content_type:
+        return None
+
+    content_type, params = _parse_content_type_header(content_type)
+
+    if 'charset' in params:
+        return params['charset'].strip("'\"")
+
+    if 'text' in content_type:
+        return 'ISO-8859-1'
+
+
+def stream_decode_response_unicode(iterator, r):
+    """Stream decodes a iterator."""
+
+    if r.encoding is None:
+        for item in iterator:
+            yield item
+        return
+
+    decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
+    for chunk in iterator:
+        rv = decoder.decode(chunk)
+        if rv:
+            yield rv
+    rv = decoder.decode(b'', final=True)
+    if rv:
+        yield rv
+
+
+def iter_slices(string, slice_length):
+    """Iterate over slices of a string."""
+    pos = 0
+    if slice_length is None or slice_length <= 0:
+        slice_length = len(string)
+    while pos < len(string):
+        yield string[pos:pos + slice_length]
+        pos += slice_length
+
+
+def get_unicode_from_response(r):
+    """Returns the requested content back in unicode.
+
+    :param r: Response object to get unicode content from.
+
+    Tried:
+
+    1. charset from content-type
+    2. fall back and replace all unicode characters
+
+    :rtype: str
+    """
+    warnings.warn((
+        'In requests 3.0, get_unicode_from_response will be removed. For '
+        'more information, please see the discussion on issue #2266. (This'
+        ' warning should only appear once.)'),
+        DeprecationWarning)
+
+    tried_encodings = []
+
+    # Try charset from content-type
+    encoding = get_encoding_from_headers(r.headers)
+
+    if encoding:
+        try:
+            return str(r.content, encoding)
+        except UnicodeError:
+            tried_encodings.append(encoding)
+
+    # Fall back:
+    try:
+        return str(r.content, encoding, errors='replace')
+    except TypeError:
+        return r.content
+
+
+# The unreserved URI characters (RFC 3986)
+UNRESERVED_SET = frozenset(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~")
+
+
+def unquote_unreserved(uri):
+    """Un-escape any percent-escape sequences in a URI that are unreserved
+    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
+
+    :rtype: str
+    """
+    parts = uri.split('%')
+    for i in range(1, len(parts)):
+        h = parts[i][0:2]
+        if len(h) == 2 and h.isalnum():
+            try:
+                c = chr(int(h, 16))
+            except ValueError:
+                raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
+
+            if c in UNRESERVED_SET:
+                parts[i] = c + parts[i][2:]
+            else:
+                parts[i] = '%' + parts[i]
+        else:
+            parts[i] = '%' + parts[i]
+    return ''.join(parts)
+
+
+def requote_uri(uri):
+    """Re-quote the given URI.
+
+    This function passes the given URI through an unquote/quote cycle to
+    ensure that it is fully and consistently quoted.
+
+    :rtype: str
+    """
+    safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
+    safe_without_percent = "!#$&'()*+,/:;=?@[]~"
+    try:
+        # Unquote only the unreserved characters
+        # Then quote only illegal characters (do not quote reserved,
+        # unreserved, or '%')
+        return quote(unquote_unreserved(uri), safe=safe_with_percent)
+    except InvalidURL:
+        # We couldn't unquote the given URI, so let's try quoting it, but
+        # there may be unquoted '%'s in the URI. We need to make sure they're
+        # properly quoted so they do not cause issues elsewhere.
+        return quote(uri, safe=safe_without_percent)
+
+
+def address_in_network(ip, net):
+    """This function allows you to check if an IP belongs to a network subnet
+
+    Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
+             returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
+
+    :rtype: bool
+    """
+    ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
+    netaddr, bits = net.split('/')
+    netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
+    network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
+    return (ipaddr & netmask) == (network & netmask)
+
+
+def dotted_netmask(mask):
+    """Converts mask from /xx format to xxx.xxx.xxx.xxx
+
+    Example: if mask is 24 function returns 255.255.255.0
+
+    :rtype: str
+    """
+    bits = 0xffffffff ^ (1 << 32 - mask) - 1
+    return socket.inet_ntoa(struct.pack('>I', bits))
+
+
+def is_ipv4_address(string_ip):
+    """
+    :rtype: bool
+    """
+    try:
+        socket.inet_aton(string_ip)
+    except socket.error:
+        return False
+    return True
+
+
+def is_valid_cidr(string_network):
+    """
+    Very simple check of the cidr format in no_proxy variable.
+
+    :rtype: bool
+    """
+    if string_network.count('/') == 1:
+        try:
+            mask = int(string_network.split('/')[1])
+        except ValueError:
+            return False
+
+        if mask < 1 or mask > 32:
+            return False
+
+        try:
+            socket.inet_aton(string_network.split('/')[0])
+        except socket.error:
+            return False
+    else:
+        return False
+    return True
+
+
+@contextlib.contextmanager
+def set_environ(env_name, value):
+    """Set the environment variable 'env_name' to 'value'
+
+    Save previous value, yield, and then restore the previous value stored in
+    the environment variable 'env_name'.
+
+    If 'value' is None, do nothing"""
+    value_changed = value is not None
+    if value_changed:
+        old_value = os.environ.get(env_name)
+        os.environ[env_name] = value
+    try:
+        yield
+    finally:
+        if value_changed:
+            if old_value is None:
+                del os.environ[env_name]
+            else:
+                os.environ[env_name] = old_value
+
+
+def should_bypass_proxies(url, no_proxy):
+    """
+    Returns whether we should bypass proxies or not.
+
+    :rtype: bool
+    """
+    # Prioritize lowercase environment variables over uppercase
+    # to keep a consistent behaviour with other http projects (curl, wget).
+    get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
+
+    # First check whether no_proxy is defined. If it is, check that the URL
+    # we're getting isn't in the no_proxy list.
+    no_proxy_arg = no_proxy
+    if no_proxy is None:
+        no_proxy = get_proxy('no_proxy')
+    parsed = urlparse(url)
+
+    if parsed.hostname is None:
+        # URLs don't always have hostnames, e.g. file:/// urls.
+        return True
+
+    if no_proxy:
+        # We need to check whether we match here. We need to see if we match
+        # the end of the hostname, both with and without the port.
+        no_proxy = (
+            host for host in no_proxy.replace(' ', '').split(',') if host
+        )
+
+        if is_ipv4_address(parsed.hostname):
+            for proxy_ip in no_proxy:
+                if is_valid_cidr(proxy_ip):
+                    if address_in_network(parsed.hostname, proxy_ip):
+                        return True
+                elif parsed.hostname == proxy_ip:
+                    # If no_proxy ip was defined in plain IP notation instead of cidr notation &
+                    # matches the IP of the index
+                    return True
+        else:
+            host_with_port = parsed.hostname
+            if parsed.port:
+                host_with_port += ':{}'.format(parsed.port)
+
+            for host in no_proxy:
+                if parsed.hostname.endswith(host) or host_with_port.endswith(host):
+                    # The URL does match something in no_proxy, so we don't want
+                    # to apply the proxies on this URL.
+                    return True
+
+    with set_environ('no_proxy', no_proxy_arg):
+        # parsed.hostname can be `None` in cases such as a file URI.
+        try:
+            bypass = proxy_bypass(parsed.hostname)
+        except (TypeError, socket.gaierror):
+            bypass = False
+
+    if bypass:
+        return True
+
+    return False
+
+
+def get_environ_proxies(url, no_proxy=None):
+    """
+    Return a dict of environment proxies.
+
+    :rtype: dict
+    """
+    if should_bypass_proxies(url, no_proxy=no_proxy):
+        return {}
+    else:
+        return getproxies()
+
+
+def select_proxy(url, proxies):
+    """Select a proxy for the url, if applicable.
+
+    :param url: The url being for the request
+    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
+    """
+    proxies = proxies or {}
+    urlparts = urlparse(url)
+    if urlparts.hostname is None:
+        return proxies.get(urlparts.scheme, proxies.get('all'))
+
+    proxy_keys = [
+        urlparts.scheme + '://' + urlparts.hostname,
+        urlparts.scheme,
+        'all://' + urlparts.hostname,
+        'all',
+    ]
+    proxy = None
+    for proxy_key in proxy_keys:
+        if proxy_key in proxies:
+            proxy = proxies[proxy_key]
+            break
+
+    return proxy
+
+
+def default_user_agent(name="python-requests"):
+    """
+    Return a string representing the default user agent.
+
+    :rtype: str
+    """
+    return '%s/%s' % (name, __version__)
+
+
+def default_headers():
+    """
+    :rtype: requests.structures.CaseInsensitiveDict
+    """
+    return CaseInsensitiveDict({
+        'User-Agent': default_user_agent(),
+        'Accept-Encoding': ', '.join(('gzip', 'deflate')),
+        'Accept': '*/*',
+        'Connection': 'keep-alive',
+    })
+
+
+def parse_header_links(value):
+    """Return a list of parsed link headers proxies.
+
+    i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
+
+    :rtype: list
+    """
+
+    links = []
+
+    replace_chars = ' \'"'
+
+    value = value.strip(replace_chars)
+    if not value:
+        return links
+
+    for val in re.split(', *<', value):
+        try:
+            url, params = val.split(';', 1)
+        except ValueError:
+            url, params = val, ''
+
+        link = {'url': url.strip('<> \'"')}
+
+        for param in params.split(';'):
+            try:
+                key, value = param.split('=')
+            except ValueError:
+                break
+
+            link[key.strip(replace_chars)] = value.strip(replace_chars)
+
+        links.append(link)
+
+    return links
+
+
+# Null bytes; no need to recreate these on each call to guess_json_utf
+_null = '\x00'.encode('ascii')  # encoding to ASCII for Python 3
+_null2 = _null * 2
+_null3 = _null * 3
+
+
+def guess_json_utf(data):
+    """
+    :rtype: str
+    """
+    # JSON always starts with two ASCII characters, so detection is as
+    # easy as counting the nulls and from their location and count
+    # determine the encoding. Also detect a BOM, if present.
+    sample = data[:4]
+    if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
+        return 'utf-32'     # BOM included
+    if sample[:3] == codecs.BOM_UTF8:
+        return 'utf-8-sig'  # BOM included, MS style (discouraged)
+    if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
+        return 'utf-16'     # BOM included
+    nullcount = sample.count(_null)
+    if nullcount == 0:
+        return 'utf-8'
+    if nullcount == 2:
+        if sample[::2] == _null2:   # 1st and 3rd are null
+            return 'utf-16-be'
+        if sample[1::2] == _null2:  # 2nd and 4th are null
+            return 'utf-16-le'
+        # Did not detect 2 valid UTF-16 ascii-range characters
+    if nullcount == 3:
+        if sample[:3] == _null3:
+            return 'utf-32-be'
+        if sample[1:] == _null3:
+            return 'utf-32-le'
+        # Did not detect a valid UTF-32 ascii-range character
+    return None
+
+
+def prepend_scheme_if_needed(url, new_scheme):
+    """Given a URL that may or may not have a scheme, prepend the given scheme.
+    Does not replace a present scheme with the one provided as an argument.
+
+    :rtype: str
+    """
+    scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme)
+
+    # urlparse is a finicky beast, and sometimes decides that there isn't a
+    # netloc present. Assume that it's being over-cautious, and switch netloc
+    # and path if urlparse decided there was no netloc.
+    if not netloc:
+        netloc, path = path, netloc
+
+    return urlunparse((scheme, netloc, path, params, query, fragment))
+
+
+def get_auth_from_url(url):
+    """Given a url with authentication components, extract them into a tuple of
+    username,password.
+
+    :rtype: (str,str)
+    """
+    parsed = urlparse(url)
+
+    try:
+        auth = (unquote(parsed.username), unquote(parsed.password))
+    except (AttributeError, TypeError):
+        auth = ('', '')
+
+    return auth
+
+
+# Moved outside of function to avoid recompile every call
+_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
+_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
+
+
+def check_header_validity(header):
+    """Verifies that header value is a string which doesn't contain
+    leading whitespace or return characters. This prevents unintended
+    header injection.
+
+    :param header: tuple, in the format (name, value).
+    """
+    name, value = header
+
+    if isinstance(value, bytes):
+        pat = _CLEAN_HEADER_REGEX_BYTE
+    else:
+        pat = _CLEAN_HEADER_REGEX_STR
+    try:
+        if not pat.match(value):
+            raise InvalidHeader("Invalid return character or leading space in header: %s" % name)
+    except TypeError:
+        raise InvalidHeader("Value for header {%s: %s} must be of type str or "
+                            "bytes, not %s" % (name, value, type(value)))
+
+
+def urldefragauth(url):
+    """
+    Given a url remove the fragment and the authentication part.
+
+    :rtype: str
+    """
+    scheme, netloc, path, params, query, fragment = urlparse(url)
+
+    # see func:`prepend_scheme_if_needed`
+    if not netloc:
+        netloc, path = path, netloc
+
+    netloc = netloc.rsplit('@', 1)[-1]
+
+    return urlunparse((scheme, netloc, path, params, query, ''))
+
+
+def rewind_body(prepared_request):
+    """Move file pointer back to its recorded starting position
+    so it can be read again on redirect.
+    """
+    body_seek = getattr(prepared_request.body, 'seek', None)
+    if body_seek is not None and isinstance(prepared_request._body_position, integer_types):
+        try:
+            body_seek(prepared_request._body_position)
+        except (IOError, OSError):
+            raise UnrewindableBodyError("An error occurred when rewinding request "
+                                        "body for redirect.")
+    else:
+        raise UnrewindableBodyError("Unable to rewind request body for redirect.")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/retrying.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/retrying.py
new file mode 100644
index 00000000..6d1e627a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/retrying.py
@@ -0,0 +1,267 @@
+## Copyright 2013-2014 Ray Holder
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+## http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+
+import random
+from pip._vendor import six
+import sys
+import time
+import traceback
+
+
+# sys.maxint / 2, since Python 3.2 doesn't have a sys.maxint...
+MAX_WAIT = 1073741823
+
+
+def retry(*dargs, **dkw):
+    """
+    Decorator function that instantiates the Retrying object
+    @param *dargs: positional arguments passed to Retrying object
+    @param **dkw: keyword arguments passed to the Retrying object
+    """
+    # support both @retry and @retry() as valid syntax
+    if len(dargs) == 1 and callable(dargs[0]):
+        def wrap_simple(f):
+
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying().call(f, *args, **kw)
+
+            return wrapped_f
+
+        return wrap_simple(dargs[0])
+
+    else:
+        def wrap(f):
+
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying(*dargs, **dkw).call(f, *args, **kw)
+
+            return wrapped_f
+
+        return wrap
+
+
+class Retrying(object):
+
+    def __init__(self,
+                 stop=None, wait=None,
+                 stop_max_attempt_number=None,
+                 stop_max_delay=None,
+                 wait_fixed=None,
+                 wait_random_min=None, wait_random_max=None,
+                 wait_incrementing_start=None, wait_incrementing_increment=None,
+                 wait_exponential_multiplier=None, wait_exponential_max=None,
+                 retry_on_exception=None,
+                 retry_on_result=None,
+                 wrap_exception=False,
+                 stop_func=None,
+                 wait_func=None,
+                 wait_jitter_max=None):
+
+        self._stop_max_attempt_number = 5 if stop_max_attempt_number is None else stop_max_attempt_number
+        self._stop_max_delay = 100 if stop_max_delay is None else stop_max_delay
+        self._wait_fixed = 1000 if wait_fixed is None else wait_fixed
+        self._wait_random_min = 0 if wait_random_min is None else wait_random_min
+        self._wait_random_max = 1000 if wait_random_max is None else wait_random_max
+        self._wait_incrementing_start = 0 if wait_incrementing_start is None else wait_incrementing_start
+        self._wait_incrementing_increment = 100 if wait_incrementing_increment is None else wait_incrementing_increment
+        self._wait_exponential_multiplier = 1 if wait_exponential_multiplier is None else wait_exponential_multiplier
+        self._wait_exponential_max = MAX_WAIT if wait_exponential_max is None else wait_exponential_max
+        self._wait_jitter_max = 0 if wait_jitter_max is None else wait_jitter_max
+
+        # TODO add chaining of stop behaviors
+        # stop behavior
+        stop_funcs = []
+        if stop_max_attempt_number is not None:
+            stop_funcs.append(self.stop_after_attempt)
+
+        if stop_max_delay is not None:
+            stop_funcs.append(self.stop_after_delay)
+
+        if stop_func is not None:
+            self.stop = stop_func
+
+        elif stop is None:
+            self.stop = lambda attempts, delay: any(f(attempts, delay) for f in stop_funcs)
+
+        else:
+            self.stop = getattr(self, stop)
+
+        # TODO add chaining of wait behaviors
+        # wait behavior
+        wait_funcs = [lambda *args, **kwargs: 0]
+        if wait_fixed is not None:
+            wait_funcs.append(self.fixed_sleep)
+
+        if wait_random_min is not None or wait_random_max is not None:
+            wait_funcs.append(self.random_sleep)
+
+        if wait_incrementing_start is not None or wait_incrementing_increment is not None:
+            wait_funcs.append(self.incrementing_sleep)
+
+        if wait_exponential_multiplier is not None or wait_exponential_max is not None:
+            wait_funcs.append(self.exponential_sleep)
+
+        if wait_func is not None:
+            self.wait = wait_func
+
+        elif wait is None:
+            self.wait = lambda attempts, delay: max(f(attempts, delay) for f in wait_funcs)
+
+        else:
+            self.wait = getattr(self, wait)
+
+        # retry on exception filter
+        if retry_on_exception is None:
+            self._retry_on_exception = self.always_reject
+        else:
+            self._retry_on_exception = retry_on_exception
+
+        # TODO simplify retrying by Exception types
+        # retry on result filter
+        if retry_on_result is None:
+            self._retry_on_result = self.never_reject
+        else:
+            self._retry_on_result = retry_on_result
+
+        self._wrap_exception = wrap_exception
+
+    def stop_after_attempt(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the previous attempt >= stop_max_attempt_number."""
+        return previous_attempt_number >= self._stop_max_attempt_number
+
+    def stop_after_delay(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the time from the first attempt >= stop_max_delay."""
+        return delay_since_first_attempt_ms >= self._stop_max_delay
+
+    def no_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Don't sleep at all before retrying."""
+        return 0
+
+    def fixed_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a fixed amount of time between each retry."""
+        return self._wait_fixed
+
+    def random_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a random amount of time between wait_random_min and wait_random_max"""
+        return random.randint(self._wait_random_min, self._wait_random_max)
+
+    def incrementing_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """
+        Sleep an incremental amount of time after each attempt, starting at
+        wait_incrementing_start and incrementing by wait_incrementing_increment
+        """
+        result = self._wait_incrementing_start + (self._wait_incrementing_increment * (previous_attempt_number - 1))
+        if result < 0:
+            result = 0
+        return result
+
+    def exponential_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        exp = 2 ** previous_attempt_number
+        result = self._wait_exponential_multiplier * exp
+        if result > self._wait_exponential_max:
+            result = self._wait_exponential_max
+        if result < 0:
+            result = 0
+        return result
+
+    def never_reject(self, result):
+        return False
+
+    def always_reject(self, result):
+        return True
+
+    def should_reject(self, attempt):
+        reject = False
+        if attempt.has_exception:
+            reject |= self._retry_on_exception(attempt.value[1])
+        else:
+            reject |= self._retry_on_result(attempt.value)
+
+        return reject
+
+    def call(self, fn, *args, **kwargs):
+        start_time = int(round(time.time() * 1000))
+        attempt_number = 1
+        while True:
+            try:
+                attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
+            except:
+                tb = sys.exc_info()
+                attempt = Attempt(tb, attempt_number, True)
+
+            if not self.should_reject(attempt):
+                return attempt.get(self._wrap_exception)
+
+            delay_since_first_attempt_ms = int(round(time.time() * 1000)) - start_time
+            if self.stop(attempt_number, delay_since_first_attempt_ms):
+                if not self._wrap_exception and attempt.has_exception:
+                    # get() on an attempt with an exception should cause it to be raised, but raise just in case
+                    raise attempt.get()
+                else:
+                    raise RetryError(attempt)
+            else:
+                sleep = self.wait(attempt_number, delay_since_first_attempt_ms)
+                if self._wait_jitter_max:
+                    jitter = random.random() * self._wait_jitter_max
+                    sleep = sleep + max(0, jitter)
+                time.sleep(sleep / 1000.0)
+
+            attempt_number += 1
+
+
+class Attempt(object):
+    """
+    An Attempt encapsulates a call to a target function that may end as a
+    normal return value from the function or an Exception depending on what
+    occurred during the execution.
+    """
+
+    def __init__(self, value, attempt_number, has_exception):
+        self.value = value
+        self.attempt_number = attempt_number
+        self.has_exception = has_exception
+
+    def get(self, wrap_exception=False):
+        """
+        Return the return value of this Attempt instance or raise an Exception.
+        If wrap_exception is true, this Attempt is wrapped inside of a
+        RetryError before being raised.
+        """
+        if self.has_exception:
+            if wrap_exception:
+                raise RetryError(self)
+            else:
+                six.reraise(self.value[0], self.value[1], self.value[2])
+        else:
+            return self.value
+
+    def __repr__(self):
+        if self.has_exception:
+            return "Attempts: {0}, Error:\n{1}".format(self.attempt_number, "".join(traceback.format_tb(self.value[2])))
+        else:
+            return "Attempts: {0}, Value: {1}".format(self.attempt_number, self.value)
+
+
+class RetryError(Exception):
+    """
+    A RetryError encapsulates the last Attempt instance right before giving up.
+    """
+
+    def __init__(self, last_attempt):
+        self.last_attempt = last_attempt
+
+    def __str__(self):
+        return "RetryError[{0}]".format(self.last_attempt)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/six.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/six.py
new file mode 100644
index 00000000..89b2188f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/six.py
@@ -0,0 +1,952 @@
+# Copyright (c) 2010-2018 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.12.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    try:
+        if from_value is None:
+            raise value
+        raise value from from_value
+    finally:
+        value = None
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        if hasattr(cls, '__qualname__'):
+            orig_vars['__qualname__'] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def ensure_binary(s, encoding='utf-8', errors='strict'):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif isinstance(s, binary_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    if PY2 and isinstance(s, text_type):
+        s = s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        s = s.decode(encoding, errors)
+    return s
+
+
+def ensure_text(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__init__.py
new file mode 100644
index 00000000..c4c0dde5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__init__.py
@@ -0,0 +1,91 @@
+"""
+urllib3 - Thread-safe connection pooling and re-using.
+"""
+from __future__ import absolute_import
+import warnings
+
+from .connectionpool import (
+    HTTPConnectionPool,
+    HTTPSConnectionPool,
+    connection_from_url
+)
+
+from . import exceptions
+from .filepost import encode_multipart_formdata
+from .poolmanager import PoolManager, ProxyManager, proxy_from_url
+from .response import HTTPResponse
+from .util.request import make_headers
+from .util.url import get_host
+from .util.timeout import Timeout
+from .util.retry import Retry
+
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+__author__ = 'Andrey Petrov (andrey.petrov@shazow.net)'
+__license__ = 'MIT'
+__version__ = '1.25.3'
+
+__all__ = (
+    'HTTPConnectionPool',
+    'HTTPSConnectionPool',
+    'PoolManager',
+    'ProxyManager',
+    'HTTPResponse',
+    'Retry',
+    'Timeout',
+    'add_stderr_logger',
+    'connection_from_url',
+    'disable_warnings',
+    'encode_multipart_formdata',
+    'get_host',
+    'make_headers',
+    'proxy_from_url',
+)
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+
+def add_stderr_logger(level=logging.DEBUG):
+    """
+    Helper for quickly adding a StreamHandler to the logger. Useful for
+    debugging.
+
+    Returns the handler after adding it.
+    """
+    # This method needs to be in this __init__.py to get the __name__ correct
+    # even if urllib3 is vendored within another package.
+    logger = logging.getLogger(__name__)
+    handler = logging.StreamHandler()
+    handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s %(message)s'))
+    logger.addHandler(handler)
+    logger.setLevel(level)
+    logger.debug('Added a stderr logging handler to logger: %s', __name__)
+    return handler
+
+
+# ... Clean up.
+del NullHandler
+
+
+# All warning filters *must* be appended unless you're really certain that they
+# shouldn't be: otherwise, it's very hard for users to use most Python
+# mechanisms to silence them.
+# SecurityWarning's always go off by default.
+warnings.simplefilter('always', exceptions.SecurityWarning, append=True)
+# SubjectAltNameWarning's should go off once per host
+warnings.simplefilter('default', exceptions.SubjectAltNameWarning, append=True)
+# InsecurePlatformWarning's don't vary between requests, so we keep it default.
+warnings.simplefilter('default', exceptions.InsecurePlatformWarning,
+                      append=True)
+# SNIMissingWarnings should go off only once.
+warnings.simplefilter('default', exceptions.SNIMissingWarning, append=True)
+
+
+def disable_warnings(category=exceptions.HTTPWarning):
+    """
+    Helper for quickly disabling all urllib3 warnings.
+    """
+    warnings.simplefilter('ignore', category)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..2787d349
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/_collections.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/_collections.cpython-37.pyc
new file mode 100644
index 00000000..7073c6b7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/_collections.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connection.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connection.cpython-37.pyc
new file mode 100644
index 00000000..6985c7d1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connection.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connectionpool.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connectionpool.cpython-37.pyc
new file mode 100644
index 00000000..0abcdf01
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/connectionpool.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/exceptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/exceptions.cpython-37.pyc
new file mode 100644
index 00000000..b3c2d1d5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/exceptions.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/fields.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/fields.cpython-37.pyc
new file mode 100644
index 00000000..8c719517
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/fields.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/filepost.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/filepost.cpython-37.pyc
new file mode 100644
index 00000000..32f52df8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/filepost.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/poolmanager.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/poolmanager.cpython-37.pyc
new file mode 100644
index 00000000..dcdda18f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/poolmanager.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/request.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/request.cpython-37.pyc
new file mode 100644
index 00000000..a89b1461
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/request.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/response.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/response.cpython-37.pyc
new file mode 100644
index 00000000..eb1cfd9d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/__pycache__/response.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/_collections.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/_collections.py
new file mode 100644
index 00000000..34f23811
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/_collections.py
@@ -0,0 +1,329 @@
+from __future__ import absolute_import
+try:
+    from collections.abc import Mapping, MutableMapping
+except ImportError:
+    from collections import Mapping, MutableMapping
+try:
+    from threading import RLock
+except ImportError:  # Platform-specific: No threads available
+    class RLock:
+        def __enter__(self):
+            pass
+
+        def __exit__(self, exc_type, exc_value, traceback):
+            pass
+
+
+from collections import OrderedDict
+from .exceptions import InvalidHeader
+from .packages.six import iterkeys, itervalues, PY3
+
+
+__all__ = ['RecentlyUsedContainer', 'HTTPHeaderDict']
+
+
+_Null = object()
+
+
+class RecentlyUsedContainer(MutableMapping):
+    """
+    Provides a thread-safe dict-like container which maintains up to
+    ``maxsize`` keys while throwing away the least-recently-used keys beyond
+    ``maxsize``.
+
+    :param maxsize:
+        Maximum number of recent elements to retain.
+
+    :param dispose_func:
+        Every time an item is evicted from the container,
+        ``dispose_func(value)`` is called.  Callback which will get called
+    """
+
+    ContainerCls = OrderedDict
+
+    def __init__(self, maxsize=10, dispose_func=None):
+        self._maxsize = maxsize
+        self.dispose_func = dispose_func
+
+        self._container = self.ContainerCls()
+        self.lock = RLock()
+
+    def __getitem__(self, key):
+        # Re-insert the item, moving it to the end of the eviction line.
+        with self.lock:
+            item = self._container.pop(key)
+            self._container[key] = item
+            return item
+
+    def __setitem__(self, key, value):
+        evicted_value = _Null
+        with self.lock:
+            # Possibly evict the existing value of 'key'
+            evicted_value = self._container.get(key, _Null)
+            self._container[key] = value
+
+            # If we didn't evict an existing value, we might have to evict the
+            # least recently used item from the beginning of the container.
+            if len(self._container) > self._maxsize:
+                _key, evicted_value = self._container.popitem(last=False)
+
+        if self.dispose_func and evicted_value is not _Null:
+            self.dispose_func(evicted_value)
+
+    def __delitem__(self, key):
+        with self.lock:
+            value = self._container.pop(key)
+
+        if self.dispose_func:
+            self.dispose_func(value)
+
+    def __len__(self):
+        with self.lock:
+            return len(self._container)
+
+    def __iter__(self):
+        raise NotImplementedError('Iteration over this class is unlikely to be threadsafe.')
+
+    def clear(self):
+        with self.lock:
+            # Copy pointers to all values, then wipe the mapping
+            values = list(itervalues(self._container))
+            self._container.clear()
+
+        if self.dispose_func:
+            for value in values:
+                self.dispose_func(value)
+
+    def keys(self):
+        with self.lock:
+            return list(iterkeys(self._container))
+
+
+class HTTPHeaderDict(MutableMapping):
+    """
+    :param headers:
+        An iterable of field-value pairs. Must not contain multiple field names
+        when compared case-insensitively.
+
+    :param kwargs:
+        Additional field-value pairs to pass in to ``dict.update``.
+
+    A ``dict`` like container for storing HTTP Headers.
+
+    Field names are stored and compared case-insensitively in compliance with
+    RFC 7230. Iteration provides the first case-sensitive key seen for each
+    case-insensitive pair.
+
+    Using ``__setitem__`` syntax overwrites fields that compare equal
+    case-insensitively in order to maintain ``dict``'s api. For fields that
+    compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
+    in a loop.
+
+    If multiple fields that are equal case-insensitively are passed to the
+    constructor or ``.update``, the behavior is undefined and some will be
+    lost.
+
+    >>> headers = HTTPHeaderDict()
+    >>> headers.add('Set-Cookie', 'foo=bar')
+    >>> headers.add('set-cookie', 'baz=quxx')
+    >>> headers['content-length'] = '7'
+    >>> headers['SET-cookie']
+    'foo=bar, baz=quxx'
+    >>> headers['Content-Length']
+    '7'
+    """
+
+    def __init__(self, headers=None, **kwargs):
+        super(HTTPHeaderDict, self).__init__()
+        self._container = OrderedDict()
+        if headers is not None:
+            if isinstance(headers, HTTPHeaderDict):
+                self._copy_from(headers)
+            else:
+                self.extend(headers)
+        if kwargs:
+            self.extend(kwargs)
+
+    def __setitem__(self, key, val):
+        self._container[key.lower()] = [key, val]
+        return self._container[key.lower()]
+
+    def __getitem__(self, key):
+        val = self._container[key.lower()]
+        return ', '.join(val[1:])
+
+    def __delitem__(self, key):
+        del self._container[key.lower()]
+
+    def __contains__(self, key):
+        return key.lower() in self._container
+
+    def __eq__(self, other):
+        if not isinstance(other, Mapping) and not hasattr(other, 'keys'):
+            return False
+        if not isinstance(other, type(self)):
+            other = type(self)(other)
+        return (dict((k.lower(), v) for k, v in self.itermerged()) ==
+                dict((k.lower(), v) for k, v in other.itermerged()))
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    if not PY3:  # Python 2
+        iterkeys = MutableMapping.iterkeys
+        itervalues = MutableMapping.itervalues
+
+    __marker = object()
+
+    def __len__(self):
+        return len(self._container)
+
+    def __iter__(self):
+        # Only provide the originally cased names
+        for vals in self._container.values():
+            yield vals[0]
+
+    def pop(self, key, default=__marker):
+        '''D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+          If key is not found, d is returned if given, otherwise KeyError is raised.
+        '''
+        # Using the MutableMapping function directly fails due to the private marker.
+        # Using ordinary dict.pop would expose the internal structures.
+        # So let's reinvent the wheel.
+        try:
+            value = self[key]
+        except KeyError:
+            if default is self.__marker:
+                raise
+            return default
+        else:
+            del self[key]
+            return value
+
+    def discard(self, key):
+        try:
+            del self[key]
+        except KeyError:
+            pass
+
+    def add(self, key, val):
+        """Adds a (name, value) pair, doesn't overwrite the value if it already
+        exists.
+
+        >>> headers = HTTPHeaderDict(foo='bar')
+        >>> headers.add('Foo', 'baz')
+        >>> headers['foo']
+        'bar, baz'
+        """
+        key_lower = key.lower()
+        new_vals = [key, val]
+        # Keep the common case aka no item present as fast as possible
+        vals = self._container.setdefault(key_lower, new_vals)
+        if new_vals is not vals:
+            vals.append(val)
+
+    def extend(self, *args, **kwargs):
+        """Generic import function for any type of header-like object.
+        Adapted version of MutableMapping.update in order to insert items
+        with self.add instead of self.__setitem__
+        """
+        if len(args) > 1:
+            raise TypeError("extend() takes at most 1 positional "
+                            "arguments ({0} given)".format(len(args)))
+        other = args[0] if len(args) >= 1 else ()
+
+        if isinstance(other, HTTPHeaderDict):
+            for key, val in other.iteritems():
+                self.add(key, val)
+        elif isinstance(other, Mapping):
+            for key in other:
+                self.add(key, other[key])
+        elif hasattr(other, "keys"):
+            for key in other.keys():
+                self.add(key, other[key])
+        else:
+            for key, value in other:
+                self.add(key, value)
+
+        for key, value in kwargs.items():
+            self.add(key, value)
+
+    def getlist(self, key, default=__marker):
+        """Returns a list of all the values for the named field. Returns an
+        empty list if the key doesn't exist."""
+        try:
+            vals = self._container[key.lower()]
+        except KeyError:
+            if default is self.__marker:
+                return []
+            return default
+        else:
+            return vals[1:]
+
+    # Backwards compatibility for httplib
+    getheaders = getlist
+    getallmatchingheaders = getlist
+    iget = getlist
+
+    # Backwards compatibility for http.cookiejar
+    get_all = getlist
+
+    def __repr__(self):
+        return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
+
+    def _copy_from(self, other):
+        for key in other:
+            val = other.getlist(key)
+            if isinstance(val, list):
+                # Don't need to convert tuples
+                val = list(val)
+            self._container[key.lower()] = [key] + val
+
+    def copy(self):
+        clone = type(self)()
+        clone._copy_from(self)
+        return clone
+
+    def iteritems(self):
+        """Iterate over all header lines, including duplicate ones."""
+        for key in self:
+            vals = self._container[key.lower()]
+            for val in vals[1:]:
+                yield vals[0], val
+
+    def itermerged(self):
+        """Iterate over all headers, merging duplicate ones together."""
+        for key in self:
+            val = self._container[key.lower()]
+            yield val[0], ', '.join(val[1:])
+
+    def items(self):
+        return list(self.iteritems())
+
+    @classmethod
+    def from_httplib(cls, message):  # Python 2
+        """Read headers from a Python 2 httplib message object."""
+        # python2.7 does not expose a proper API for exporting multiheaders
+        # efficiently. This function re-reads raw lines from the message
+        # object and extracts the multiheaders properly.
+        obs_fold_continued_leaders = (' ', '\t')
+        headers = []
+
+        for line in message.headers:
+            if line.startswith(obs_fold_continued_leaders):
+                if not headers:
+                    # We received a header line that starts with OWS as described
+                    # in RFC-7230 S3.2.4. This indicates a multiline header, but
+                    # there exists no previous header to which we can attach it.
+                    raise InvalidHeader(
+                        'Header continuation with no previous header: %s' % line
+                    )
+                else:
+                    key, value = headers[-1]
+                    headers[-1] = (key, value + ' ' + line.strip())
+                    continue
+
+            key, value = line.split(':', 1)
+            headers.append((key, value.strip()))
+
+        return cls(headers)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connection.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connection.py
new file mode 100644
index 00000000..57c58fed
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connection.py
@@ -0,0 +1,417 @@
+from __future__ import absolute_import
+import datetime
+import logging
+import os
+import socket
+from socket import error as SocketError, timeout as SocketTimeout
+import warnings
+from .packages import six
+from .packages.six.moves.http_client import HTTPConnection as _HTTPConnection
+from .packages.six.moves.http_client import HTTPException  # noqa: F401
+
+try:  # Compiled with SSL?
+    import ssl
+    BaseSSLError = ssl.SSLError
+except (ImportError, AttributeError):  # Platform-specific: No SSL.
+    ssl = None
+
+    class BaseSSLError(BaseException):
+        pass
+
+
+try:
+    # Python 3: not a no-op, we're adding this to the namespace so it can be imported.
+    ConnectionError = ConnectionError
+except NameError:
+    # Python 2
+    class ConnectionError(Exception):
+        pass
+
+
+from .exceptions import (
+    NewConnectionError,
+    ConnectTimeoutError,
+    SubjectAltNameWarning,
+    SystemTimeWarning,
+)
+from .packages.ssl_match_hostname import match_hostname, CertificateError
+
+from .util.ssl_ import (
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    assert_fingerprint,
+    create_urllib3_context,
+    ssl_wrap_socket
+)
+
+
+from .util import connection
+
+from ._collections import HTTPHeaderDict
+
+log = logging.getLogger(__name__)
+
+port_by_scheme = {
+    'http': 80,
+    'https': 443,
+}
+
+# When updating RECENT_DATE, move it to within two years of the current date,
+# and not less than 6 months ago.
+# Example: if Today is 2018-01-01, then RECENT_DATE should be any date on or
+# after 2016-01-01 (today - 2 years) AND before 2017-07-01 (today - 6 months)
+RECENT_DATE = datetime.date(2017, 6, 30)
+
+
+class DummyConnection(object):
+    """Used to detect a failed ConnectionCls import."""
+    pass
+
+
+class HTTPConnection(_HTTPConnection, object):
+    """
+    Based on httplib.HTTPConnection but provides an extra constructor
+    backwards-compatibility layer between older and newer Pythons.
+
+    Additional keyword parameters are used to configure attributes of the connection.
+    Accepted parameters include:
+
+      - ``strict``: See the documentation on :class:`urllib3.connectionpool.HTTPConnectionPool`
+      - ``source_address``: Set the source address for the current connection.
+      - ``socket_options``: Set specific options on the underlying socket. If not specified, then
+        defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
+        Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
+
+        For example, if you wish to enable TCP Keep Alive in addition to the defaults,
+        you might pass::
+
+            HTTPConnection.default_socket_options + [
+                (socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
+            ]
+
+        Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
+    """
+
+    default_port = port_by_scheme['http']
+
+    #: Disable Nagle's algorithm by default.
+    #: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
+    default_socket_options = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]
+
+    #: Whether this connection verifies the host's certificate.
+    is_verified = False
+
+    def __init__(self, *args, **kw):
+        if six.PY3:
+            kw.pop('strict', None)
+
+        # Pre-set source_address.
+        self.source_address = kw.get('source_address')
+
+        #: The socket options provided by the user. If no options are
+        #: provided, we use the default options.
+        self.socket_options = kw.pop('socket_options', self.default_socket_options)
+
+        _HTTPConnection.__init__(self, *args, **kw)
+
+    @property
+    def host(self):
+        """
+        Getter method to remove any trailing dots that indicate the hostname is an FQDN.
+
+        In general, SSL certificates don't include the trailing dot indicating a
+        fully-qualified domain name, and thus, they don't validate properly when
+        checked against a domain name that includes the dot. In addition, some
+        servers may not expect to receive the trailing dot when provided.
+
+        However, the hostname with trailing dot is critical to DNS resolution; doing a
+        lookup with the trailing dot will properly only resolve the appropriate FQDN,
+        whereas a lookup without a trailing dot will search the system's search domain
+        list. Thus, it's important to keep the original host around for use only in
+        those cases where it's appropriate (i.e., when doing DNS lookup to establish the
+        actual TCP connection across which we're going to send HTTP requests).
+        """
+        return self._dns_host.rstrip('.')
+
+    @host.setter
+    def host(self, value):
+        """
+        Setter for the `host` property.
+
+        We assume that only urllib3 uses the _dns_host attribute; httplib itself
+        only uses `host`, and it seems reasonable that other libraries follow suit.
+        """
+        self._dns_host = value
+
+    def _new_conn(self):
+        """ Establish a socket connection and set nodelay settings on it.
+
+        :return: New socket connection.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw['source_address'] = self.source_address
+
+        if self.socket_options:
+            extra_kw['socket_options'] = self.socket_options
+
+        try:
+            conn = connection.create_connection(
+                (self._dns_host, self.port), self.timeout, **extra_kw)
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self, "Connection to %s timed out. (connect timeout=%s)" %
+                (self.host, self.timeout))
+
+        except SocketError as e:
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e)
+
+        return conn
+
+    def _prepare_conn(self, conn):
+        self.sock = conn
+        # Google App Engine's httplib does not define _tunnel_host
+        if getattr(self, '_tunnel_host', None):
+            # TODO: Fix tunnel so it doesn't depend on self.sock state.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+    def connect(self):
+        conn = self._new_conn()
+        self._prepare_conn(conn)
+
+    def request_chunked(self, method, url, body=None, headers=None):
+        """
+        Alternative to the common request method, which sends the
+        body with chunked encoding and not as one block
+        """
+        headers = HTTPHeaderDict(headers if headers is not None else {})
+        skip_accept_encoding = 'accept-encoding' in headers
+        skip_host = 'host' in headers
+        self.putrequest(
+            method,
+            url,
+            skip_accept_encoding=skip_accept_encoding,
+            skip_host=skip_host
+        )
+        for header, value in headers.items():
+            self.putheader(header, value)
+        if 'transfer-encoding' not in headers:
+            self.putheader('Transfer-Encoding', 'chunked')
+        self.endheaders()
+
+        if body is not None:
+            stringish_types = six.string_types + (bytes,)
+            if isinstance(body, stringish_types):
+                body = (body,)
+            for chunk in body:
+                if not chunk:
+                    continue
+                if not isinstance(chunk, bytes):
+                    chunk = chunk.encode('utf8')
+                len_str = hex(len(chunk))[2:]
+                self.send(len_str.encode('utf-8'))
+                self.send(b'\r\n')
+                self.send(chunk)
+                self.send(b'\r\n')
+
+        # After the if clause, to always have a closed body
+        self.send(b'0\r\n\r\n')
+
+
+class HTTPSConnection(HTTPConnection):
+    default_port = port_by_scheme['https']
+
+    ssl_version = None
+
+    def __init__(self, host, port=None, key_file=None, cert_file=None,
+                 key_password=None, strict=None,
+                 timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+                 ssl_context=None, server_hostname=None, **kw):
+
+        HTTPConnection.__init__(self, host, port, strict=strict,
+                                timeout=timeout, **kw)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.key_password = key_password
+        self.ssl_context = ssl_context
+        self.server_hostname = server_hostname
+
+        # Required property for Google AppEngine 1.9.0 which otherwise causes
+        # HTTPS requests to go out as HTTP. (See Issue #356)
+        self._protocol = 'https'
+
+    def connect(self):
+        conn = self._new_conn()
+        self._prepare_conn(conn)
+
+        # Wrap socket using verification with the root certs in
+        # trusted_root_certs
+        default_ssl_context = False
+        if self.ssl_context is None:
+            default_ssl_context = True
+            self.ssl_context = create_urllib3_context(
+                ssl_version=resolve_ssl_version(self.ssl_version),
+                cert_reqs=resolve_cert_reqs(self.cert_reqs),
+            )
+
+        # Try to load OS default certs if none are given.
+        # Works well on Windows (requires Python3.4+)
+        context = self.ssl_context
+        if (not self.ca_certs and not self.ca_cert_dir and default_ssl_context
+                and hasattr(context, 'load_default_certs')):
+            context.load_default_certs()
+
+        self.sock = ssl_wrap_socket(
+            sock=conn,
+            keyfile=self.key_file,
+            certfile=self.cert_file,
+            key_password=self.key_password,
+            ssl_context=self.ssl_context,
+            server_hostname=self.server_hostname
+        )
+
+
+class VerifiedHTTPSConnection(HTTPSConnection):
+    """
+    Based on httplib.HTTPSConnection but wraps the socket with
+    SSL certification.
+    """
+    cert_reqs = None
+    ca_certs = None
+    ca_cert_dir = None
+    ssl_version = None
+    assert_fingerprint = None
+
+    def set_cert(self, key_file=None, cert_file=None,
+                 cert_reqs=None, key_password=None, ca_certs=None,
+                 assert_hostname=None, assert_fingerprint=None,
+                 ca_cert_dir=None):
+        """
+        This method should only be called once, before the connection is used.
+        """
+        # If cert_reqs is not provided we'll assume CERT_REQUIRED unless we also
+        # have an SSLContext object in which case we'll use its verify_mode.
+        if cert_reqs is None:
+            if self.ssl_context is not None:
+                cert_reqs = self.ssl_context.verify_mode
+            else:
+                cert_reqs = resolve_cert_reqs(None)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+        self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
+        self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
+
+    def connect(self):
+        # Add certificate verification
+        conn = self._new_conn()
+        hostname = self.host
+
+        # Google App Engine's httplib does not define _tunnel_host
+        if getattr(self, '_tunnel_host', None):
+            self.sock = conn
+            # Calls self._set_hostport(), so self.host is
+            # self._tunnel_host below.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+            # Override the host with the one we're requesting data from.
+            hostname = self._tunnel_host
+
+        server_hostname = hostname
+        if self.server_hostname is not None:
+            server_hostname = self.server_hostname
+
+        is_time_off = datetime.date.today() < RECENT_DATE
+        if is_time_off:
+            warnings.warn((
+                'System time is way off (before {0}). This will probably '
+                'lead to SSL verification errors').format(RECENT_DATE),
+                SystemTimeWarning
+            )
+
+        # Wrap socket using verification with the root certs in
+        # trusted_root_certs
+        default_ssl_context = False
+        if self.ssl_context is None:
+            default_ssl_context = True
+            self.ssl_context = create_urllib3_context(
+                ssl_version=resolve_ssl_version(self.ssl_version),
+                cert_reqs=resolve_cert_reqs(self.cert_reqs),
+            )
+
+        context = self.ssl_context
+        context.verify_mode = resolve_cert_reqs(self.cert_reqs)
+
+        # Try to load OS default certs if none are given.
+        # Works well on Windows (requires Python3.4+)
+        if (not self.ca_certs and not self.ca_cert_dir and default_ssl_context
+                and hasattr(context, 'load_default_certs')):
+            context.load_default_certs()
+
+        self.sock = ssl_wrap_socket(
+            sock=conn,
+            keyfile=self.key_file,
+            certfile=self.cert_file,
+            key_password=self.key_password,
+            ca_certs=self.ca_certs,
+            ca_cert_dir=self.ca_cert_dir,
+            server_hostname=server_hostname,
+            ssl_context=context)
+
+        if self.assert_fingerprint:
+            assert_fingerprint(self.sock.getpeercert(binary_form=True),
+                               self.assert_fingerprint)
+        elif context.verify_mode != ssl.CERT_NONE \
+                and not getattr(context, 'check_hostname', False) \
+                and self.assert_hostname is not False:
+            # While urllib3 attempts to always turn off hostname matching from
+            # the TLS library, this cannot always be done. So we check whether
+            # the TLS Library still thinks it's matching hostnames.
+            cert = self.sock.getpeercert()
+            if not cert.get('subjectAltName', ()):
+                warnings.warn((
+                    'Certificate for {0} has no `subjectAltName`, falling back to check for a '
+                    '`commonName` for now. This feature is being removed by major browsers and '
+                    'deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 '
+                    'for details.)'.format(hostname)),
+                    SubjectAltNameWarning
+                )
+            _match_hostname(cert, self.assert_hostname or server_hostname)
+
+        self.is_verified = (
+            context.verify_mode == ssl.CERT_REQUIRED or
+            self.assert_fingerprint is not None
+        )
+
+
+def _match_hostname(cert, asserted_hostname):
+    try:
+        match_hostname(cert, asserted_hostname)
+    except CertificateError as e:
+        log.error(
+            'Certificate did not match expected hostname: %s. '
+            'Certificate: %s', asserted_hostname, cert
+        )
+        # Add cert to exception and reraise so client code can inspect
+        # the cert when catching the exception, if they want to
+        e._peer_cert = cert
+        raise
+
+
+if ssl:
+    # Make a copy for testing.
+    UnverifiedHTTPSConnection = HTTPSConnection
+    HTTPSConnection = VerifiedHTTPSConnection
+else:
+    HTTPSConnection = DummyConnection
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connectionpool.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connectionpool.py
new file mode 100644
index 00000000..157568a3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/connectionpool.py
@@ -0,0 +1,897 @@
+from __future__ import absolute_import
+import errno
+import logging
+import sys
+import warnings
+
+from socket import error as SocketError, timeout as SocketTimeout
+import socket
+
+
+from .exceptions import (
+    ClosedPoolError,
+    ProtocolError,
+    EmptyPoolError,
+    HeaderParsingError,
+    HostChangedError,
+    LocationValueError,
+    MaxRetryError,
+    ProxyError,
+    ReadTimeoutError,
+    SSLError,
+    TimeoutError,
+    InsecureRequestWarning,
+    NewConnectionError,
+)
+from .packages.ssl_match_hostname import CertificateError
+from .packages import six
+from .packages.six.moves import queue
+from .packages.rfc3986.normalizers import normalize_host
+from .connection import (
+    port_by_scheme,
+    DummyConnection,
+    HTTPConnection, HTTPSConnection, VerifiedHTTPSConnection,
+    HTTPException, BaseSSLError,
+)
+from .request import RequestMethods
+from .response import HTTPResponse
+
+from .util.connection import is_connection_dropped
+from .util.request import set_file_position
+from .util.response import assert_header_parsing
+from .util.retry import Retry
+from .util.timeout import Timeout
+from .util.url import get_host, Url, NORMALIZABLE_SCHEMES
+from .util.queue import LifoQueue
+
+
+xrange = six.moves.xrange
+
+log = logging.getLogger(__name__)
+
+_Default = object()
+
+
+# Pool objects
+class ConnectionPool(object):
+    """
+    Base class for all connection pools, such as
+    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
+    """
+
+    scheme = None
+    QueueCls = LifoQueue
+
+    def __init__(self, host, port=None):
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        self.host = _normalize_host(host, scheme=self.scheme)
+        self._proxy_host = host.lower()
+        self.port = port
+
+    def __str__(self):
+        return '%s(host=%r, port=%r)' % (type(self).__name__,
+                                         self.host, self.port)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        pass
+
+
+# This is taken from http://hg.python.org/cpython/file/7aaba721ebc0/Lib/socket.py#l252
+_blocking_errnos = {errno.EAGAIN, errno.EWOULDBLOCK}
+
+
+class HTTPConnectionPool(ConnectionPool, RequestMethods):
+    """
+    Thread-safe connection pool for one host.
+
+    :param host:
+        Host used for this HTTP Connection (e.g. "localhost"), passed into
+        :class:`httplib.HTTPConnection`.
+
+    :param port:
+        Port used for this HTTP Connection (None is equivalent to 80), passed
+        into :class:`httplib.HTTPConnection`.
+
+    :param strict:
+        Causes BadStatusLine to be raised if the status line can't be parsed
+        as a valid HTTP/1.0 or 1.1 status line, passed into
+        :class:`httplib.HTTPConnection`.
+
+        .. note::
+           Only works in Python 2. This parameter is ignored in Python 3.
+
+    :param timeout:
+        Socket timeout in seconds for each individual connection. This can
+        be a float or integer, which sets the timeout for the HTTP request,
+        or an instance of :class:`urllib3.util.Timeout` which gives you more
+        fine-grained control over request timeouts. After the constructor has
+        been parsed, this is always a `urllib3.util.Timeout` object.
+
+    :param maxsize:
+        Number of connections to save that can be reused. More than 1 is useful
+        in multithreaded situations. If ``block`` is set to False, more
+        connections will be created but they will not be saved once they've
+        been used.
+
+    :param block:
+        If set to True, no more than ``maxsize`` connections will be used at
+        a time. When no free connections are available, the call will block
+        until a connection has been released. This is a useful side effect for
+        particular multithreaded situations where one does not want to use more
+        than maxsize connections per host to prevent flooding.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param retries:
+        Retry configuration to use by default with requests in this pool.
+
+    :param _proxy:
+        Parsed proxy URL, should not be used directly, instead, see
+        :class:`urllib3.connectionpool.ProxyManager`"
+
+    :param _proxy_headers:
+        A dictionary with proxy headers, should not be used directly,
+        instead, see :class:`urllib3.connectionpool.ProxyManager`"
+
+    :param \\**conn_kw:
+        Additional parameters are used to create fresh :class:`urllib3.connection.HTTPConnection`,
+        :class:`urllib3.connection.HTTPSConnection` instances.
+    """
+
+    scheme = 'http'
+    ConnectionCls = HTTPConnection
+    ResponseCls = HTTPResponse
+
+    def __init__(self, host, port=None, strict=False,
+                 timeout=Timeout.DEFAULT_TIMEOUT, maxsize=1, block=False,
+                 headers=None, retries=None,
+                 _proxy=None, _proxy_headers=None,
+                 **conn_kw):
+        ConnectionPool.__init__(self, host, port)
+        RequestMethods.__init__(self, headers)
+
+        self.strict = strict
+
+        if not isinstance(timeout, Timeout):
+            timeout = Timeout.from_float(timeout)
+
+        if retries is None:
+            retries = Retry.DEFAULT
+
+        self.timeout = timeout
+        self.retries = retries
+
+        self.pool = self.QueueCls(maxsize)
+        self.block = block
+
+        self.proxy = _proxy
+        self.proxy_headers = _proxy_headers or {}
+
+        # Fill the queue up so that doing get() on it will block properly
+        for _ in xrange(maxsize):
+            self.pool.put(None)
+
+        # These are mostly for testing and debugging purposes.
+        self.num_connections = 0
+        self.num_requests = 0
+        self.conn_kw = conn_kw
+
+        if self.proxy:
+            # Enable Nagle's algorithm for proxies, to avoid packet fragmentation.
+            # We cannot know if the user has added default socket options, so we cannot replace the
+            # list.
+            self.conn_kw.setdefault('socket_options', [])
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`HTTPConnection`.
+        """
+        self.num_connections += 1
+        log.debug("Starting new HTTP connection (%d): %s:%s",
+                  self.num_connections, self.host, self.port or "80")
+
+        conn = self.ConnectionCls(host=self.host, port=self.port,
+                                  timeout=self.timeout.connect_timeout,
+                                  strict=self.strict, **self.conn_kw)
+        return conn
+
+    def _get_conn(self, timeout=None):
+        """
+        Get a connection. Will return a pooled connection if one is available.
+
+        If no connections are available and :prop:`.block` is ``False``, then a
+        fresh connection is returned.
+
+        :param timeout:
+            Seconds to wait before giving up and raising
+            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
+            :prop:`.block` is ``True``.
+        """
+        conn = None
+        try:
+            conn = self.pool.get(block=self.block, timeout=timeout)
+
+        except AttributeError:  # self.pool is None
+            raise ClosedPoolError(self, "Pool is closed.")
+
+        except queue.Empty:
+            if self.block:
+                raise EmptyPoolError(self,
+                                     "Pool reached maximum size and no more "
+                                     "connections are allowed.")
+            pass  # Oh well, we'll create a new connection then
+
+        # If this is a persistent connection, check if it got disconnected
+        if conn and is_connection_dropped(conn):
+            log.debug("Resetting dropped connection: %s", self.host)
+            conn.close()
+            if getattr(conn, 'auto_open', 1) == 0:
+                # This is a proxied connection that has been mutated by
+                # httplib._tunnel() and cannot be reused (since it would
+                # attempt to bypass the proxy)
+                conn = None
+
+        return conn or self._new_conn()
+
+    def _put_conn(self, conn):
+        """
+        Put a connection back into the pool.
+
+        :param conn:
+            Connection object for the current host and port as returned by
+            :meth:`._new_conn` or :meth:`._get_conn`.
+
+        If the pool is already full, the connection is closed and discarded
+        because we exceeded maxsize. If connections are discarded frequently,
+        then maxsize should be increased.
+
+        If the pool is closed, then the connection will be closed and discarded.
+        """
+        try:
+            self.pool.put(conn, block=False)
+            return  # Everything is dandy, done.
+        except AttributeError:
+            # self.pool is None.
+            pass
+        except queue.Full:
+            # This should never happen if self.block == True
+            log.warning(
+                "Connection pool is full, discarding connection: %s",
+                self.host)
+
+        # Connection never got put back into the pool, close it.
+        if conn:
+            conn.close()
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        pass
+
+    def _prepare_proxy(self, conn):
+        # Nothing to do for HTTP connections.
+        pass
+
+    def _get_timeout(self, timeout):
+        """ Helper that always returns a :class:`urllib3.util.Timeout` """
+        if timeout is _Default:
+            return self.timeout.clone()
+
+        if isinstance(timeout, Timeout):
+            return timeout.clone()
+        else:
+            # User passed us an int/float. This is for backwards compatibility,
+            # can be removed later
+            return Timeout.from_float(timeout)
+
+    def _raise_timeout(self, err, url, timeout_value):
+        """Is the error actually a timeout? Will raise a ReadTimeout or pass"""
+
+        if isinstance(err, SocketTimeout):
+            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
+
+        # See the above comment about EAGAIN in Python 3. In Python 2 we have
+        # to specifically catch it and throw the timeout error
+        if hasattr(err, 'errno') and err.errno in _blocking_errnos:
+            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
+
+        # Catch possible read timeouts thrown as SSL errors. If not the
+        # case, rethrow the original. We need to do this because of:
+        # http://bugs.python.org/issue10272
+        if 'timed out' in str(err) or 'did not complete (read)' in str(err):  # Python < 2.7.4
+            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
+
+    def _make_request(self, conn, method, url, timeout=_Default, chunked=False,
+                      **httplib_request_kw):
+        """
+        Perform a request on a given urllib connection object taken from our
+        pool.
+
+        :param conn:
+            a connection from one of our connection pools
+
+        :param timeout:
+            Socket timeout in seconds for the request. This can be a
+            float or integer, which will set the same timeout value for
+            the socket connect and the socket read, or an instance of
+            :class:`urllib3.util.Timeout`, which gives you more fine-grained
+            control over your timeouts.
+        """
+        self.num_requests += 1
+
+        timeout_obj = self._get_timeout(timeout)
+        timeout_obj.start_connect()
+        conn.timeout = timeout_obj.connect_timeout
+
+        # Trigger any extra validation we need to do.
+        try:
+            self._validate_conn(conn)
+        except (SocketTimeout, BaseSSLError) as e:
+            # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.
+            self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
+            raise
+
+        # conn.request() calls httplib.*.request, not the method in
+        # urllib3.request. It also calls makefile (recv) on the socket.
+        if chunked:
+            conn.request_chunked(method, url, **httplib_request_kw)
+        else:
+            conn.request(method, url, **httplib_request_kw)
+
+        # Reset the timeout for the recv() on the socket
+        read_timeout = timeout_obj.read_timeout
+
+        # App Engine doesn't have a sock attr
+        if getattr(conn, 'sock', None):
+            # In Python 3 socket.py will catch EAGAIN and return None when you
+            # try and read into the file pointer created by http.client, which
+            # instead raises a BadStatusLine exception. Instead of catching
+            # the exception and assuming all BadStatusLine exceptions are read
+            # timeouts, check for a zero timeout before making the request.
+            if read_timeout == 0:
+                raise ReadTimeoutError(
+                    self, url, "Read timed out. (read timeout=%s)" % read_timeout)
+            if read_timeout is Timeout.DEFAULT_TIMEOUT:
+                conn.sock.settimeout(socket.getdefaulttimeout())
+            else:  # None or a value
+                conn.sock.settimeout(read_timeout)
+
+        # Receive the response from the server
+        try:
+            try:
+                # Python 2.7, use buffering of HTTP responses
+                httplib_response = conn.getresponse(buffering=True)
+            except TypeError:
+                # Python 3
+                try:
+                    httplib_response = conn.getresponse()
+                except Exception as e:
+                    # Remove the TypeError from the exception chain in Python 3;
+                    # otherwise it looks like a programming error was the cause.
+                    six.raise_from(e, None)
+        except (SocketTimeout, BaseSSLError, SocketError) as e:
+            self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
+            raise
+
+        # AppEngine doesn't have a version attr.
+        http_version = getattr(conn, '_http_vsn_str', 'HTTP/?')
+        log.debug("%s://%s:%s \"%s %s %s\" %s %s", self.scheme, self.host, self.port,
+                  method, url, http_version, httplib_response.status,
+                  httplib_response.length)
+
+        try:
+            assert_header_parsing(httplib_response.msg)
+        except (HeaderParsingError, TypeError) as hpe:  # Platform-specific: Python 3
+            log.warning(
+                'Failed to parse headers (url=%s): %s',
+                self._absolute_url(url), hpe, exc_info=True)
+
+        return httplib_response
+
+    def _absolute_url(self, path):
+        return Url(scheme=self.scheme, host=self.host, port=self.port, path=path).url
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        if self.pool is None:
+            return
+        # Disable access to the pool
+        old_pool, self.pool = self.pool, None
+
+        try:
+            while True:
+                conn = old_pool.get(block=False)
+                if conn:
+                    conn.close()
+
+        except queue.Empty:
+            pass  # Done.
+
+    def is_same_host(self, url):
+        """
+        Check if the given ``url`` is a member of the same host as this
+        connection pool.
+        """
+        if url.startswith('/'):
+            return True
+
+        # TODO: Add optional support for socket.gethostbyname checking.
+        scheme, host, port = get_host(url)
+        if host is not None:
+            host = _normalize_host(host, scheme=scheme)
+
+        # Use explicit default port for comparison when none is given
+        if self.port and not port:
+            port = port_by_scheme.get(scheme)
+        elif not self.port and port == port_by_scheme.get(scheme):
+            port = None
+
+        return (scheme, host, port) == (self.scheme, self.host, self.port)
+
+    def urlopen(self, method, url, body=None, headers=None, retries=None,
+                redirect=True, assert_same_host=True, timeout=_Default,
+                pool_timeout=None, release_conn=None, chunked=False,
+                body_pos=None, **response_kw):
+        """
+        Get a connection from the pool and perform an HTTP request. This is the
+        lowest level call for making a request, so you'll need to specify all
+        the raw details.
+
+        .. note::
+
+           More commonly, it's appropriate to use a convenience method provided
+           by :class:`.RequestMethods`, such as :meth:`request`.
+
+        .. note::
+
+           `release_conn` will only behave as expected if
+           `preload_content=False` because we want to make
+           `preload_content=False` the default behaviour someday soon without
+           breaking backwards compatibility.
+
+        :param method:
+            HTTP request method (such as GET, POST, PUT, etc.)
+
+        :param body:
+            Data to send in the request body (useful for creating
+            POST requests, see HTTPConnectionPool.post_url for
+            more convenience).
+
+        :param headers:
+            Dictionary of custom headers to send, such as User-Agent,
+            If-None-Match, etc. If None, pool headers are used. If provided,
+            these headers completely replace any pool-specific headers.
+
+        :param retries:
+            Configure the number of retries to allow before raising a
+            :class:`~urllib3.exceptions.MaxRetryError` exception.
+
+            Pass ``None`` to retry until you receive a response. Pass a
+            :class:`~urllib3.util.retry.Retry` object for fine-grained control
+            over different types of retries.
+            Pass an integer number to retry connection errors that many times,
+            but no other types of errors. Pass zero to never retry.
+
+            If ``False``, then retries are disabled and any exception is raised
+            immediately. Also, instead of raising a MaxRetryError on redirects,
+            the redirect response will be returned.
+
+        :type retries: :class:`~urllib3.util.retry.Retry`, False, or an int.
+
+        :param redirect:
+            If True, automatically handle redirects (status codes 301, 302,
+            303, 307, 308). Each redirect counts as a retry. Disabling retries
+            will disable redirect, too.
+
+        :param assert_same_host:
+            If ``True``, will make sure that the host of the pool requests is
+            consistent else will raise HostChangedError. When False, you can
+            use the pool on an HTTP proxy and request foreign hosts.
+
+        :param timeout:
+            If specified, overrides the default timeout for this one
+            request. It may be a float (in seconds) or an instance of
+            :class:`urllib3.util.Timeout`.
+
+        :param pool_timeout:
+            If set and the pool is set to block=True, then this method will
+            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
+            connection is available within the time period.
+
+        :param release_conn:
+            If False, then the urlopen call will not release the connection
+            back into the pool once a response is received (but will release if
+            you read the entire contents of the response such as when
+            `preload_content=True`). This is useful if you're not preloading
+            the response's content immediately. You will need to call
+            ``r.release_conn()`` on the response ``r`` to return the connection
+            back into the pool. If None, it takes the value of
+            ``response_kw.get('preload_content', True)``.
+
+        :param chunked:
+            If True, urllib3 will send the body using chunked transfer
+            encoding. Otherwise, urllib3 will send the body using the standard
+            content-length form. Defaults to False.
+
+        :param int body_pos:
+            Position to seek to in file-like body in the event of a retry or
+            redirect. Typically this won't need to be set because urllib3 will
+            auto-populate the value when needed.
+
+        :param \\**response_kw:
+            Additional parameters are passed to
+            :meth:`urllib3.response.HTTPResponse.from_httplib`
+        """
+        if headers is None:
+            headers = self.headers
+
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
+
+        if release_conn is None:
+            release_conn = response_kw.get('preload_content', True)
+
+        # Check host
+        if assert_same_host and not self.is_same_host(url):
+            raise HostChangedError(self, url, retries)
+
+        conn = None
+
+        # Track whether `conn` needs to be released before
+        # returning/raising/recursing. Update this variable if necessary, and
+        # leave `release_conn` constant throughout the function. That way, if
+        # the function recurses, the original value of `release_conn` will be
+        # passed down into the recursive call, and its value will be respected.
+        #
+        # See issue #651 [1] for details.
+        #
+        # [1] <https://github.com/shazow/urllib3/issues/651>
+        release_this_conn = release_conn
+
+        # Merge the proxy headers. Only do this in HTTP. We have to copy the
+        # headers dict so we can safely change it without those changes being
+        # reflected in anyone else's copy.
+        if self.scheme == 'http':
+            headers = headers.copy()
+            headers.update(self.proxy_headers)
+
+        # Must keep the exception bound to a separate variable or else Python 3
+        # complains about UnboundLocalError.
+        err = None
+
+        # Keep track of whether we cleanly exited the except block. This
+        # ensures we do proper cleanup in finally.
+        clean_exit = False
+
+        # Rewind body position, if needed. Record current position
+        # for future rewinds in the event of a redirect/retry.
+        body_pos = set_file_position(body, body_pos)
+
+        try:
+            # Request a connection from the queue.
+            timeout_obj = self._get_timeout(timeout)
+            conn = self._get_conn(timeout=pool_timeout)
+
+            conn.timeout = timeout_obj.connect_timeout
+
+            is_new_proxy_conn = self.proxy is not None and not getattr(conn, 'sock', None)
+            if is_new_proxy_conn:
+                self._prepare_proxy(conn)
+
+            # Make the request on the httplib connection object.
+            httplib_response = self._make_request(conn, method, url,
+                                                  timeout=timeout_obj,
+                                                  body=body, headers=headers,
+                                                  chunked=chunked)
+
+            # If we're going to release the connection in ``finally:``, then
+            # the response doesn't need to know about the connection. Otherwise
+            # it will also try to release it and we'll have a double-release
+            # mess.
+            response_conn = conn if not release_conn else None
+
+            # Pass method to Response for length checking
+            response_kw['request_method'] = method
+
+            # Import httplib's response into our own wrapper object
+            response = self.ResponseCls.from_httplib(httplib_response,
+                                                     pool=self,
+                                                     connection=response_conn,
+                                                     retries=retries,
+                                                     **response_kw)
+
+            # Everything went great!
+            clean_exit = True
+
+        except queue.Empty:
+            # Timed out by queue.
+            raise EmptyPoolError(self, "No pool connections are available.")
+
+        except (TimeoutError, HTTPException, SocketError, ProtocolError,
+                BaseSSLError, SSLError, CertificateError) as e:
+            # Discard the connection for these exceptions. It will be
+            # replaced during the next _get_conn() call.
+            clean_exit = False
+            if isinstance(e, (BaseSSLError, CertificateError)):
+                e = SSLError(e)
+            elif isinstance(e, (SocketError, NewConnectionError)) and self.proxy:
+                e = ProxyError('Cannot connect to proxy.', e)
+            elif isinstance(e, (SocketError, HTTPException)):
+                e = ProtocolError('Connection aborted.', e)
+
+            retries = retries.increment(method, url, error=e, _pool=self,
+                                        _stacktrace=sys.exc_info()[2])
+            retries.sleep()
+
+            # Keep track of the error for the retry warning.
+            err = e
+
+        finally:
+            if not clean_exit:
+                # We hit some kind of exception, handled or otherwise. We need
+                # to throw the connection away unless explicitly told not to.
+                # Close the connection, set the variable to None, and make sure
+                # we put the None back in the pool to avoid leaking it.
+                conn = conn and conn.close()
+                release_this_conn = True
+
+            if release_this_conn:
+                # Put the connection back to be reused. If the connection is
+                # expired then it will be None, which will get replaced with a
+                # fresh connection during _get_conn.
+                self._put_conn(conn)
+
+        if not conn:
+            # Try again
+            log.warning("Retrying (%r) after connection "
+                        "broken by '%r': %s", retries, err, url)
+            return self.urlopen(method, url, body, headers, retries,
+                                redirect, assert_same_host,
+                                timeout=timeout, pool_timeout=pool_timeout,
+                                release_conn=release_conn, body_pos=body_pos,
+                                **response_kw)
+
+        def drain_and_release_conn(response):
+            try:
+                # discard any remaining response body, the connection will be
+                # released back to the pool once the entire response is read
+                response.read()
+            except (TimeoutError, HTTPException, SocketError, ProtocolError,
+                    BaseSSLError, SSLError):
+                pass
+
+        # Handle redirect?
+        redirect_location = redirect and response.get_redirect_location()
+        if redirect_location:
+            if response.status == 303:
+                method = 'GET'
+
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_redirect:
+                    # Drain and release the connection for this response, since
+                    # we're not returning it to be released manually.
+                    drain_and_release_conn(response)
+                    raise
+                return response
+
+            # drain and return the connection to the pool before recursing
+            drain_and_release_conn(response)
+
+            retries.sleep_for_retry(response)
+            log.debug("Redirecting %s -> %s", url, redirect_location)
+            return self.urlopen(
+                method, redirect_location, body, headers,
+                retries=retries, redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout, pool_timeout=pool_timeout,
+                release_conn=release_conn, body_pos=body_pos,
+                **response_kw)
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(response.getheader('Retry-After'))
+        if retries.is_retry(method, response.status, has_retry_after):
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_status:
+                    # Drain and release the connection for this response, since
+                    # we're not returning it to be released manually.
+                    drain_and_release_conn(response)
+                    raise
+                return response
+
+            # drain and return the connection to the pool before recursing
+            drain_and_release_conn(response)
+
+            retries.sleep(response)
+            log.debug("Retry: %s", url)
+            return self.urlopen(
+                method, url, body, headers,
+                retries=retries, redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout, pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                body_pos=body_pos, **response_kw)
+
+        return response
+
+
+class HTTPSConnectionPool(HTTPConnectionPool):
+    """
+    Same as :class:`.HTTPConnectionPool`, but HTTPS.
+
+    When Python is compiled with the :mod:`ssl` module, then
+    :class:`.VerifiedHTTPSConnection` is used, which *can* verify certificates,
+    instead of :class:`.HTTPSConnection`.
+
+    :class:`.VerifiedHTTPSConnection` uses one of ``assert_fingerprint``,
+    ``assert_hostname`` and ``host`` in this order to verify connections.
+    If ``assert_hostname`` is False, no verification is done.
+
+    The ``key_file``, ``cert_file``, ``cert_reqs``, ``ca_certs``,
+    ``ca_cert_dir``, ``ssl_version``, ``key_password`` are only used if :mod:`ssl`
+    is available and are fed into :meth:`urllib3.util.ssl_wrap_socket` to upgrade
+    the connection socket into an SSL socket.
+    """
+
+    scheme = 'https'
+    ConnectionCls = HTTPSConnection
+
+    def __init__(self, host, port=None,
+                 strict=False, timeout=Timeout.DEFAULT_TIMEOUT, maxsize=1,
+                 block=False, headers=None, retries=None,
+                 _proxy=None, _proxy_headers=None,
+                 key_file=None, cert_file=None, cert_reqs=None,
+                 key_password=None, ca_certs=None, ssl_version=None,
+                 assert_hostname=None, assert_fingerprint=None,
+                 ca_cert_dir=None, **conn_kw):
+
+        HTTPConnectionPool.__init__(self, host, port, strict, timeout, maxsize,
+                                    block, headers, retries, _proxy, _proxy_headers,
+                                    **conn_kw)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.ca_certs = ca_certs
+        self.ca_cert_dir = ca_cert_dir
+        self.ssl_version = ssl_version
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+
+    def _prepare_conn(self, conn):
+        """
+        Prepare the ``connection`` for :meth:`urllib3.util.ssl_wrap_socket`
+        and establish the tunnel if proxy is used.
+        """
+
+        if isinstance(conn, VerifiedHTTPSConnection):
+            conn.set_cert(key_file=self.key_file,
+                          key_password=self.key_password,
+                          cert_file=self.cert_file,
+                          cert_reqs=self.cert_reqs,
+                          ca_certs=self.ca_certs,
+                          ca_cert_dir=self.ca_cert_dir,
+                          assert_hostname=self.assert_hostname,
+                          assert_fingerprint=self.assert_fingerprint)
+            conn.ssl_version = self.ssl_version
+        return conn
+
+    def _prepare_proxy(self, conn):
+        """
+        Establish tunnel connection early, because otherwise httplib
+        would improperly set Host: header to proxy's IP:port.
+        """
+        conn.set_tunnel(self._proxy_host, self.port, self.proxy_headers)
+        conn.connect()
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`httplib.HTTPSConnection`.
+        """
+        self.num_connections += 1
+        log.debug("Starting new HTTPS connection (%d): %s:%s",
+                  self.num_connections, self.host, self.port or "443")
+
+        if not self.ConnectionCls or self.ConnectionCls is DummyConnection:
+            raise SSLError("Can't connect to HTTPS URL because the SSL "
+                           "module is not available.")
+
+        actual_host = self.host
+        actual_port = self.port
+        if self.proxy is not None:
+            actual_host = self.proxy.host
+            actual_port = self.proxy.port
+
+        conn = self.ConnectionCls(host=actual_host, port=actual_port,
+                                  timeout=self.timeout.connect_timeout,
+                                  strict=self.strict, cert_file=self.cert_file,
+                                  key_file=self.key_file, key_password=self.key_password,
+                                  **self.conn_kw)
+
+        return self._prepare_conn(conn)
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        super(HTTPSConnectionPool, self)._validate_conn(conn)
+
+        # Force connect early to allow us to validate the connection.
+        if not getattr(conn, 'sock', None):  # AppEngine might not have  `.sock`
+            conn.connect()
+
+        if not conn.is_verified:
+            warnings.warn((
+                'Unverified HTTPS request is being made. '
+                'Adding certificate verification is strongly advised. See: '
+                'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
+                '#ssl-warnings'),
+                InsecureRequestWarning)
+
+
+def connection_from_url(url, **kw):
+    """
+    Given a url, return an :class:`.ConnectionPool` instance of its host.
+
+    This is a shortcut for not having to parse out the scheme, host, and port
+    of the url before creating an :class:`.ConnectionPool` instance.
+
+    :param url:
+        Absolute URL string that must include the scheme. Port is optional.
+
+    :param \\**kw:
+        Passes additional parameters to the constructor of the appropriate
+        :class:`.ConnectionPool`. Useful for specifying things like
+        timeout, maxsize, headers, etc.
+
+    Example::
+
+        >>> conn = connection_from_url('http://google.com/')
+        >>> r = conn.request('GET', '/')
+    """
+    scheme, host, port = get_host(url)
+    port = port or port_by_scheme.get(scheme, 80)
+    if scheme == 'https':
+        return HTTPSConnectionPool(host, port=port, **kw)
+    else:
+        return HTTPConnectionPool(host, port=port, **kw)
+
+
+def _normalize_host(host, scheme):
+    """
+    Normalize hosts for comparisons and use with sockets.
+    """
+
+    # httplib doesn't like it when we include brackets in IPv6 addresses
+    # Specifically, if we include brackets but also pass the port then
+    # httplib crazily doubles up the square brackets on the Host header.
+    # Instead, we need to make sure we never pass ``None`` as the port.
+    # However, for backward compatibility reasons we can't actually
+    # *assert* that.  See http://bugs.python.org/issue28539
+    if host.startswith('[') and host.endswith(']'):
+        host = host.strip('[]')
+    if scheme in NORMALIZABLE_SCHEMES:
+        host = normalize_host(host)
+    return host
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..cc3c1476
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/_appengine_environ.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/_appengine_environ.cpython-37.pyc
new file mode 100644
index 00000000..089018cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/_appengine_environ.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/appengine.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/appengine.cpython-37.pyc
new file mode 100644
index 00000000..12138869
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/appengine.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/ntlmpool.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/ntlmpool.cpython-37.pyc
new file mode 100644
index 00000000..69eaa274
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/ntlmpool.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/pyopenssl.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/pyopenssl.cpython-37.pyc
new file mode 100644
index 00000000..1ae8648f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/pyopenssl.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/securetransport.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/securetransport.cpython-37.pyc
new file mode 100644
index 00000000..65274966
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/securetransport.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/socks.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/socks.cpython-37.pyc
new file mode 100644
index 00000000..3cda2194
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/__pycache__/socks.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_appengine_environ.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_appengine_environ.py
new file mode 100644
index 00000000..f3e00942
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_appengine_environ.py
@@ -0,0 +1,30 @@
+"""
+This module provides means to detect the App Engine environment.
+"""
+
+import os
+
+
+def is_appengine():
+    return (is_local_appengine() or
+            is_prod_appengine() or
+            is_prod_appengine_mvms())
+
+
+def is_appengine_sandbox():
+    return is_appengine() and not is_prod_appengine_mvms()
+
+
+def is_local_appengine():
+    return ('APPENGINE_RUNTIME' in os.environ and
+            'Development/' in os.environ['SERVER_SOFTWARE'])
+
+
+def is_prod_appengine():
+    return ('APPENGINE_RUNTIME' in os.environ and
+            'Google App Engine/' in os.environ['SERVER_SOFTWARE'] and
+            not is_prod_appengine_mvms())
+
+
+def is_prod_appengine_mvms():
+    return os.environ.get('GAE_VM', False) == 'true'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..646ccac4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/bindings.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/bindings.cpython-37.pyc
new file mode 100644
index 00000000..873fe675
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/bindings.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/low_level.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/low_level.cpython-37.pyc
new file mode 100644
index 00000000..f9538aa9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/__pycache__/low_level.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/bindings.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
new file mode 100644
index 00000000..be342153
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
@@ -0,0 +1,593 @@
+"""
+This module uses ctypes to bind a whole bunch of functions and constants from
+SecureTransport. The goal here is to provide the low-level API to
+SecureTransport. These are essentially the C-level functions and constants, and
+they're pretty gross to work with.
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import platform
+from ctypes.util import find_library
+from ctypes import (
+    c_void_p, c_int32, c_char_p, c_size_t, c_byte, c_uint32, c_ulong, c_long,
+    c_bool
+)
+from ctypes import CDLL, POINTER, CFUNCTYPE
+
+
+security_path = find_library('Security')
+if not security_path:
+    raise ImportError('The library Security could not be found')
+
+
+core_foundation_path = find_library('CoreFoundation')
+if not core_foundation_path:
+    raise ImportError('The library CoreFoundation could not be found')
+
+
+version = platform.mac_ver()[0]
+version_info = tuple(map(int, version.split('.')))
+if version_info < (10, 8):
+    raise OSError(
+        'Only OS X 10.8 and newer are supported, not %s.%s' % (
+            version_info[0], version_info[1]
+        )
+    )
+
+Security = CDLL(security_path, use_errno=True)
+CoreFoundation = CDLL(core_foundation_path, use_errno=True)
+
+Boolean = c_bool
+CFIndex = c_long
+CFStringEncoding = c_uint32
+CFData = c_void_p
+CFString = c_void_p
+CFArray = c_void_p
+CFMutableArray = c_void_p
+CFDictionary = c_void_p
+CFError = c_void_p
+CFType = c_void_p
+CFTypeID = c_ulong
+
+CFTypeRef = POINTER(CFType)
+CFAllocatorRef = c_void_p
+
+OSStatus = c_int32
+
+CFDataRef = POINTER(CFData)
+CFStringRef = POINTER(CFString)
+CFArrayRef = POINTER(CFArray)
+CFMutableArrayRef = POINTER(CFMutableArray)
+CFDictionaryRef = POINTER(CFDictionary)
+CFArrayCallBacks = c_void_p
+CFDictionaryKeyCallBacks = c_void_p
+CFDictionaryValueCallBacks = c_void_p
+
+SecCertificateRef = POINTER(c_void_p)
+SecExternalFormat = c_uint32
+SecExternalItemType = c_uint32
+SecIdentityRef = POINTER(c_void_p)
+SecItemImportExportFlags = c_uint32
+SecItemImportExportKeyParameters = c_void_p
+SecKeychainRef = POINTER(c_void_p)
+SSLProtocol = c_uint32
+SSLCipherSuite = c_uint32
+SSLContextRef = POINTER(c_void_p)
+SecTrustRef = POINTER(c_void_p)
+SSLConnectionRef = c_uint32
+SecTrustResultType = c_uint32
+SecTrustOptionFlags = c_uint32
+SSLProtocolSide = c_uint32
+SSLConnectionType = c_uint32
+SSLSessionOption = c_uint32
+
+
+try:
+    Security.SecItemImport.argtypes = [
+        CFDataRef,
+        CFStringRef,
+        POINTER(SecExternalFormat),
+        POINTER(SecExternalItemType),
+        SecItemImportExportFlags,
+        POINTER(SecItemImportExportKeyParameters),
+        SecKeychainRef,
+        POINTER(CFArrayRef),
+    ]
+    Security.SecItemImport.restype = OSStatus
+
+    Security.SecCertificateGetTypeID.argtypes = []
+    Security.SecCertificateGetTypeID.restype = CFTypeID
+
+    Security.SecIdentityGetTypeID.argtypes = []
+    Security.SecIdentityGetTypeID.restype = CFTypeID
+
+    Security.SecKeyGetTypeID.argtypes = []
+    Security.SecKeyGetTypeID.restype = CFTypeID
+
+    Security.SecCertificateCreateWithData.argtypes = [
+        CFAllocatorRef,
+        CFDataRef
+    ]
+    Security.SecCertificateCreateWithData.restype = SecCertificateRef
+
+    Security.SecCertificateCopyData.argtypes = [
+        SecCertificateRef
+    ]
+    Security.SecCertificateCopyData.restype = CFDataRef
+
+    Security.SecCopyErrorMessageString.argtypes = [
+        OSStatus,
+        c_void_p
+    ]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SecIdentityCreateWithCertificate.argtypes = [
+        CFTypeRef,
+        SecCertificateRef,
+        POINTER(SecIdentityRef)
+    ]
+    Security.SecIdentityCreateWithCertificate.restype = OSStatus
+
+    Security.SecKeychainCreate.argtypes = [
+        c_char_p,
+        c_uint32,
+        c_void_p,
+        Boolean,
+        c_void_p,
+        POINTER(SecKeychainRef)
+    ]
+    Security.SecKeychainCreate.restype = OSStatus
+
+    Security.SecKeychainDelete.argtypes = [
+        SecKeychainRef
+    ]
+    Security.SecKeychainDelete.restype = OSStatus
+
+    Security.SecPKCS12Import.argtypes = [
+        CFDataRef,
+        CFDictionaryRef,
+        POINTER(CFArrayRef)
+    ]
+    Security.SecPKCS12Import.restype = OSStatus
+
+    SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
+    SSLWriteFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t))
+
+    Security.SSLSetIOFuncs.argtypes = [
+        SSLContextRef,
+        SSLReadFunc,
+        SSLWriteFunc
+    ]
+    Security.SSLSetIOFuncs.restype = OSStatus
+
+    Security.SSLSetPeerID.argtypes = [
+        SSLContextRef,
+        c_char_p,
+        c_size_t
+    ]
+    Security.SSLSetPeerID.restype = OSStatus
+
+    Security.SSLSetCertificate.argtypes = [
+        SSLContextRef,
+        CFArrayRef
+    ]
+    Security.SSLSetCertificate.restype = OSStatus
+
+    Security.SSLSetCertificateAuthorities.argtypes = [
+        SSLContextRef,
+        CFTypeRef,
+        Boolean
+    ]
+    Security.SSLSetCertificateAuthorities.restype = OSStatus
+
+    Security.SSLSetConnection.argtypes = [
+        SSLContextRef,
+        SSLConnectionRef
+    ]
+    Security.SSLSetConnection.restype = OSStatus
+
+    Security.SSLSetPeerDomainName.argtypes = [
+        SSLContextRef,
+        c_char_p,
+        c_size_t
+    ]
+    Security.SSLSetPeerDomainName.restype = OSStatus
+
+    Security.SSLHandshake.argtypes = [
+        SSLContextRef
+    ]
+    Security.SSLHandshake.restype = OSStatus
+
+    Security.SSLRead.argtypes = [
+        SSLContextRef,
+        c_char_p,
+        c_size_t,
+        POINTER(c_size_t)
+    ]
+    Security.SSLRead.restype = OSStatus
+
+    Security.SSLWrite.argtypes = [
+        SSLContextRef,
+        c_char_p,
+        c_size_t,
+        POINTER(c_size_t)
+    ]
+    Security.SSLWrite.restype = OSStatus
+
+    Security.SSLClose.argtypes = [
+        SSLContextRef
+    ]
+    Security.SSLClose.restype = OSStatus
+
+    Security.SSLGetNumberSupportedCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(c_size_t)
+    ]
+    Security.SSLGetNumberSupportedCiphers.restype = OSStatus
+
+    Security.SSLGetSupportedCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t)
+    ]
+    Security.SSLGetSupportedCiphers.restype = OSStatus
+
+    Security.SSLSetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        c_size_t
+    ]
+    Security.SSLSetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNumberEnabledCiphers.argtype = [
+        SSLContextRef,
+        POINTER(c_size_t)
+    ]
+    Security.SSLGetNumberEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t)
+    ]
+    Security.SSLGetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNegotiatedCipher.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite)
+    ]
+    Security.SSLGetNegotiatedCipher.restype = OSStatus
+
+    Security.SSLGetNegotiatedProtocolVersion.argtypes = [
+        SSLContextRef,
+        POINTER(SSLProtocol)
+    ]
+    Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
+
+    Security.SSLCopyPeerTrust.argtypes = [
+        SSLContextRef,
+        POINTER(SecTrustRef)
+    ]
+    Security.SSLCopyPeerTrust.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificates.argtypes = [
+        SecTrustRef,
+        CFArrayRef
+    ]
+    Security.SecTrustSetAnchorCertificates.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificatesOnly.argstypes = [
+        SecTrustRef,
+        Boolean
+    ]
+    Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
+
+    Security.SecTrustEvaluate.argtypes = [
+        SecTrustRef,
+        POINTER(SecTrustResultType)
+    ]
+    Security.SecTrustEvaluate.restype = OSStatus
+
+    Security.SecTrustGetCertificateCount.argtypes = [
+        SecTrustRef
+    ]
+    Security.SecTrustGetCertificateCount.restype = CFIndex
+
+    Security.SecTrustGetCertificateAtIndex.argtypes = [
+        SecTrustRef,
+        CFIndex
+    ]
+    Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
+
+    Security.SSLCreateContext.argtypes = [
+        CFAllocatorRef,
+        SSLProtocolSide,
+        SSLConnectionType
+    ]
+    Security.SSLCreateContext.restype = SSLContextRef
+
+    Security.SSLSetSessionOption.argtypes = [
+        SSLContextRef,
+        SSLSessionOption,
+        Boolean
+    ]
+    Security.SSLSetSessionOption.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMin.argtypes = [
+        SSLContextRef,
+        SSLProtocol
+    ]
+    Security.SSLSetProtocolVersionMin.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMax.argtypes = [
+        SSLContextRef,
+        SSLProtocol
+    ]
+    Security.SSLSetProtocolVersionMax.restype = OSStatus
+
+    Security.SecCopyErrorMessageString.argtypes = [
+        OSStatus,
+        c_void_p
+    ]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SSLReadFunc = SSLReadFunc
+    Security.SSLWriteFunc = SSLWriteFunc
+    Security.SSLContextRef = SSLContextRef
+    Security.SSLProtocol = SSLProtocol
+    Security.SSLCipherSuite = SSLCipherSuite
+    Security.SecIdentityRef = SecIdentityRef
+    Security.SecKeychainRef = SecKeychainRef
+    Security.SecTrustRef = SecTrustRef
+    Security.SecTrustResultType = SecTrustResultType
+    Security.SecExternalFormat = SecExternalFormat
+    Security.OSStatus = OSStatus
+
+    Security.kSecImportExportPassphrase = CFStringRef.in_dll(
+        Security, 'kSecImportExportPassphrase'
+    )
+    Security.kSecImportItemIdentity = CFStringRef.in_dll(
+        Security, 'kSecImportItemIdentity'
+    )
+
+    # CoreFoundation time!
+    CoreFoundation.CFRetain.argtypes = [
+        CFTypeRef
+    ]
+    CoreFoundation.CFRetain.restype = CFTypeRef
+
+    CoreFoundation.CFRelease.argtypes = [
+        CFTypeRef
+    ]
+    CoreFoundation.CFRelease.restype = None
+
+    CoreFoundation.CFGetTypeID.argtypes = [
+        CFTypeRef
+    ]
+    CoreFoundation.CFGetTypeID.restype = CFTypeID
+
+    CoreFoundation.CFStringCreateWithCString.argtypes = [
+        CFAllocatorRef,
+        c_char_p,
+        CFStringEncoding
+    ]
+    CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
+
+    CoreFoundation.CFStringGetCStringPtr.argtypes = [
+        CFStringRef,
+        CFStringEncoding
+    ]
+    CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
+
+    CoreFoundation.CFStringGetCString.argtypes = [
+        CFStringRef,
+        c_char_p,
+        CFIndex,
+        CFStringEncoding
+    ]
+    CoreFoundation.CFStringGetCString.restype = c_bool
+
+    CoreFoundation.CFDataCreate.argtypes = [
+        CFAllocatorRef,
+        c_char_p,
+        CFIndex
+    ]
+    CoreFoundation.CFDataCreate.restype = CFDataRef
+
+    CoreFoundation.CFDataGetLength.argtypes = [
+        CFDataRef
+    ]
+    CoreFoundation.CFDataGetLength.restype = CFIndex
+
+    CoreFoundation.CFDataGetBytePtr.argtypes = [
+        CFDataRef
+    ]
+    CoreFoundation.CFDataGetBytePtr.restype = c_void_p
+
+    CoreFoundation.CFDictionaryCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFDictionaryKeyCallBacks,
+        CFDictionaryValueCallBacks
+    ]
+    CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
+
+    CoreFoundation.CFDictionaryGetValue.argtypes = [
+        CFDictionaryRef,
+        CFTypeRef
+    ]
+    CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
+
+    CoreFoundation.CFArrayCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFArrayCallBacks,
+    ]
+    CoreFoundation.CFArrayCreate.restype = CFArrayRef
+
+    CoreFoundation.CFArrayCreateMutable.argtypes = [
+        CFAllocatorRef,
+        CFIndex,
+        CFArrayCallBacks
+    ]
+    CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
+
+    CoreFoundation.CFArrayAppendValue.argtypes = [
+        CFMutableArrayRef,
+        c_void_p
+    ]
+    CoreFoundation.CFArrayAppendValue.restype = None
+
+    CoreFoundation.CFArrayGetCount.argtypes = [
+        CFArrayRef
+    ]
+    CoreFoundation.CFArrayGetCount.restype = CFIndex
+
+    CoreFoundation.CFArrayGetValueAtIndex.argtypes = [
+        CFArrayRef,
+        CFIndex
+    ]
+    CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
+
+    CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
+        CoreFoundation, 'kCFAllocatorDefault'
+    )
+    CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(CoreFoundation, 'kCFTypeArrayCallBacks')
+    CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
+        CoreFoundation, 'kCFTypeDictionaryKeyCallBacks'
+    )
+    CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
+        CoreFoundation, 'kCFTypeDictionaryValueCallBacks'
+    )
+
+    CoreFoundation.CFTypeRef = CFTypeRef
+    CoreFoundation.CFArrayRef = CFArrayRef
+    CoreFoundation.CFStringRef = CFStringRef
+    CoreFoundation.CFDictionaryRef = CFDictionaryRef
+
+except (AttributeError):
+    raise ImportError('Error initializing ctypes')
+
+
+class CFConst(object):
+    """
+    A class object that acts as essentially a namespace for CoreFoundation
+    constants.
+    """
+    kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
+
+
+class SecurityConst(object):
+    """
+    A class object that acts as essentially a namespace for Security constants.
+    """
+    kSSLSessionOptionBreakOnServerAuth = 0
+
+    kSSLProtocol2 = 1
+    kSSLProtocol3 = 2
+    kTLSProtocol1 = 4
+    kTLSProtocol11 = 7
+    kTLSProtocol12 = 8
+    kTLSProtocol13 = 10
+    kTLSProtocolMaxSupported = 999
+
+    kSSLClientSide = 1
+    kSSLStreamType = 0
+
+    kSecFormatPEMSequence = 10
+
+    kSecTrustResultInvalid = 0
+    kSecTrustResultProceed = 1
+    # This gap is present on purpose: this was kSecTrustResultConfirm, which
+    # is deprecated.
+    kSecTrustResultDeny = 3
+    kSecTrustResultUnspecified = 4
+    kSecTrustResultRecoverableTrustFailure = 5
+    kSecTrustResultFatalTrustFailure = 6
+    kSecTrustResultOtherError = 7
+
+    errSSLProtocol = -9800
+    errSSLWouldBlock = -9803
+    errSSLClosedGraceful = -9805
+    errSSLClosedNoNotify = -9816
+    errSSLClosedAbort = -9806
+
+    errSSLXCertChainInvalid = -9807
+    errSSLCrypto = -9809
+    errSSLInternal = -9810
+    errSSLCertExpired = -9814
+    errSSLCertNotYetValid = -9815
+    errSSLUnknownRootCert = -9812
+    errSSLNoRootCert = -9813
+    errSSLHostNameMismatch = -9843
+    errSSLPeerHandshakeFail = -9824
+    errSSLPeerUserCancelled = -9839
+    errSSLWeakPeerEphemeralDHKey = -9850
+    errSSLServerAuthCompleted = -9841
+    errSSLRecordOverflow = -9847
+
+    errSecVerifyFailed = -67808
+    errSecNoTrustSettings = -25263
+    errSecItemNotFound = -25300
+    errSecInvalidTrustSettings = -25262
+
+    # Cipher suites. We only pick the ones our default cipher string allows.
+    # Source: https://developer.apple.com/documentation/security/1550981-ssl_cipher_suite_values
+    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
+    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
+    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
+    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
+    TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA9
+    TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA8
+    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
+    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
+    TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
+    TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
+    TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
+    TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
+    TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
+    TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
+    TLS_AES_128_GCM_SHA256 = 0x1301
+    TLS_AES_256_GCM_SHA384 = 0x1302
+    TLS_AES_128_CCM_8_SHA256 = 0x1305
+    TLS_AES_128_CCM_SHA256 = 0x1304
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
new file mode 100644
index 00000000..b13cd9e7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
@@ -0,0 +1,346 @@
+"""
+Low-level helpers for the SecureTransport bindings.
+
+These are Python functions that are not directly related to the high-level APIs
+but are necessary to get them to work. They include a whole bunch of low-level
+CoreFoundation messing about and memory management. The concerns in this module
+are almost entirely about trying to avoid memory leaks and providing
+appropriate and useful assistance to the higher-level code.
+"""
+import base64
+import ctypes
+import itertools
+import re
+import os
+import ssl
+import tempfile
+
+from .bindings import Security, CoreFoundation, CFConst
+
+
+# This regular expression is used to grab PEM data out of a PEM bundle.
+_PEM_CERTS_RE = re.compile(
+    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
+)
+
+
+def _cf_data_from_bytes(bytestring):
+    """
+    Given a bytestring, create a CFData object from it. This CFData object must
+    be CFReleased by the caller.
+    """
+    return CoreFoundation.CFDataCreate(
+        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
+    )
+
+
+def _cf_dictionary_from_tuples(tuples):
+    """
+    Given a list of Python tuples, create an associated CFDictionary.
+    """
+    dictionary_size = len(tuples)
+
+    # We need to get the dictionary keys and values out in the same order.
+    keys = (t[0] for t in tuples)
+    values = (t[1] for t in tuples)
+    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
+    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
+
+    return CoreFoundation.CFDictionaryCreate(
+        CoreFoundation.kCFAllocatorDefault,
+        cf_keys,
+        cf_values,
+        dictionary_size,
+        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
+        CoreFoundation.kCFTypeDictionaryValueCallBacks,
+    )
+
+
+def _cf_string_to_unicode(value):
+    """
+    Creates a Unicode string from a CFString object. Used entirely for error
+    reporting.
+
+    Yes, it annoys me quite a lot that this function is this complex.
+    """
+    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
+
+    string = CoreFoundation.CFStringGetCStringPtr(
+        value_as_void_p,
+        CFConst.kCFStringEncodingUTF8
+    )
+    if string is None:
+        buffer = ctypes.create_string_buffer(1024)
+        result = CoreFoundation.CFStringGetCString(
+            value_as_void_p,
+            buffer,
+            1024,
+            CFConst.kCFStringEncodingUTF8
+        )
+        if not result:
+            raise OSError('Error copying C string from CFStringRef')
+        string = buffer.value
+    if string is not None:
+        string = string.decode('utf-8')
+    return string
+
+
+def _assert_no_error(error, exception_class=None):
+    """
+    Checks the return code and throws an exception if there is an error to
+    report
+    """
+    if error == 0:
+        return
+
+    cf_error_string = Security.SecCopyErrorMessageString(error, None)
+    output = _cf_string_to_unicode(cf_error_string)
+    CoreFoundation.CFRelease(cf_error_string)
+
+    if output is None or output == u'':
+        output = u'OSStatus %s' % error
+
+    if exception_class is None:
+        exception_class = ssl.SSLError
+
+    raise exception_class(output)
+
+
+def _cert_array_from_pem(pem_bundle):
+    """
+    Given a bundle of certs in PEM format, turns them into a CFArray of certs
+    that can be used to validate a cert chain.
+    """
+    # Normalize the PEM bundle's line endings.
+    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
+
+    der_certs = [
+        base64.b64decode(match.group(1))
+        for match in _PEM_CERTS_RE.finditer(pem_bundle)
+    ]
+    if not der_certs:
+        raise ssl.SSLError("No root certificates specified")
+
+    cert_array = CoreFoundation.CFArrayCreateMutable(
+        CoreFoundation.kCFAllocatorDefault,
+        0,
+        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks)
+    )
+    if not cert_array:
+        raise ssl.SSLError("Unable to allocate memory!")
+
+    try:
+        for der_bytes in der_certs:
+            certdata = _cf_data_from_bytes(der_bytes)
+            if not certdata:
+                raise ssl.SSLError("Unable to allocate memory!")
+            cert = Security.SecCertificateCreateWithData(
+                CoreFoundation.kCFAllocatorDefault, certdata
+            )
+            CoreFoundation.CFRelease(certdata)
+            if not cert:
+                raise ssl.SSLError("Unable to build cert object!")
+
+            CoreFoundation.CFArrayAppendValue(cert_array, cert)
+            CoreFoundation.CFRelease(cert)
+    except Exception:
+        # We need to free the array before the exception bubbles further.
+        # We only want to do that if an error occurs: otherwise, the caller
+        # should free.
+        CoreFoundation.CFRelease(cert_array)
+
+    return cert_array
+
+
+def _is_cert(item):
+    """
+    Returns True if a given CFTypeRef is a certificate.
+    """
+    expected = Security.SecCertificateGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _is_identity(item):
+    """
+    Returns True if a given CFTypeRef is an identity.
+    """
+    expected = Security.SecIdentityGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _temporary_keychain():
+    """
+    This function creates a temporary Mac keychain that we can use to work with
+    credentials. This keychain uses a one-time password and a temporary file to
+    store the data. We expect to have one keychain per socket. The returned
+    SecKeychainRef must be freed by the caller, including calling
+    SecKeychainDelete.
+
+    Returns a tuple of the SecKeychainRef and the path to the temporary
+    directory that contains it.
+    """
+    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
+    # means we cannot use mkstemp to use a generic temporary file. Instead,
+    # we're going to create a temporary directory and a filename to use there.
+    # This filename will be 8 random bytes expanded into base64. We also need
+    # some random bytes to password-protect the keychain we're creating, so we
+    # ask for 40 random bytes.
+    random_bytes = os.urandom(40)
+    filename = base64.b16encode(random_bytes[:8]).decode('utf-8')
+    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
+    tempdirectory = tempfile.mkdtemp()
+
+    keychain_path = os.path.join(tempdirectory, filename).encode('utf-8')
+
+    # We now want to create the keychain itself.
+    keychain = Security.SecKeychainRef()
+    status = Security.SecKeychainCreate(
+        keychain_path,
+        len(password),
+        password,
+        False,
+        None,
+        ctypes.byref(keychain)
+    )
+    _assert_no_error(status)
+
+    # Having created the keychain, we want to pass it off to the caller.
+    return keychain, tempdirectory
+
+
+def _load_items_from_file(keychain, path):
+    """
+    Given a single file, loads all the trust objects from it into arrays and
+    the keychain.
+    Returns a tuple of lists: the first list is a list of identities, the
+    second a list of certs.
+    """
+    certificates = []
+    identities = []
+    result_array = None
+
+    with open(path, 'rb') as f:
+        raw_filedata = f.read()
+
+    try:
+        filedata = CoreFoundation.CFDataCreate(
+            CoreFoundation.kCFAllocatorDefault,
+            raw_filedata,
+            len(raw_filedata)
+        )
+        result_array = CoreFoundation.CFArrayRef()
+        result = Security.SecItemImport(
+            filedata,  # cert data
+            None,  # Filename, leaving it out for now
+            None,  # What the type of the file is, we don't care
+            None,  # what's in the file, we don't care
+            0,  # import flags
+            None,  # key params, can include passphrase in the future
+            keychain,  # The keychain to insert into
+            ctypes.byref(result_array)  # Results
+        )
+        _assert_no_error(result)
+
+        # A CFArray is not very useful to us as an intermediary
+        # representation, so we are going to extract the objects we want
+        # and then free the array. We don't need to keep hold of keys: the
+        # keychain already has them!
+        result_count = CoreFoundation.CFArrayGetCount(result_array)
+        for index in range(result_count):
+            item = CoreFoundation.CFArrayGetValueAtIndex(
+                result_array, index
+            )
+            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
+
+            if _is_cert(item):
+                CoreFoundation.CFRetain(item)
+                certificates.append(item)
+            elif _is_identity(item):
+                CoreFoundation.CFRetain(item)
+                identities.append(item)
+    finally:
+        if result_array:
+            CoreFoundation.CFRelease(result_array)
+
+        CoreFoundation.CFRelease(filedata)
+
+    return (identities, certificates)
+
+
+def _load_client_cert_chain(keychain, *paths):
+    """
+    Load certificates and maybe keys from a number of files. Has the end goal
+    of returning a CFArray containing one SecIdentityRef, and then zero or more
+    SecCertificateRef objects, suitable for use as a client certificate trust
+    chain.
+    """
+    # Ok, the strategy.
+    #
+    # This relies on knowing that macOS will not give you a SecIdentityRef
+    # unless you have imported a key into a keychain. This is a somewhat
+    # artificial limitation of macOS (for example, it doesn't necessarily
+    # affect iOS), but there is nothing inside Security.framework that lets you
+    # get a SecIdentityRef without having a key in a keychain.
+    #
+    # So the policy here is we take all the files and iterate them in order.
+    # Each one will use SecItemImport to have one or more objects loaded from
+    # it. We will also point at a keychain that macOS can use to work with the
+    # private key.
+    #
+    # Once we have all the objects, we'll check what we actually have. If we
+    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
+    # we'll take the first certificate (which we assume to be our leaf) and
+    # ask the keychain to give us a SecIdentityRef with that cert's associated
+    # key.
+    #
+    # We'll then return a CFArray containing the trust chain: one
+    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
+    # responsibility for freeing this CFArray will be with the caller. This
+    # CFArray must remain alive for the entire connection, so in practice it
+    # will be stored with a single SSLSocket, along with the reference to the
+    # keychain.
+    certificates = []
+    identities = []
+
+    # Filter out bad paths.
+    paths = (path for path in paths if path)
+
+    try:
+        for file_path in paths:
+            new_identities, new_certs = _load_items_from_file(
+                keychain, file_path
+            )
+            identities.extend(new_identities)
+            certificates.extend(new_certs)
+
+        # Ok, we have everything. The question is: do we have an identity? If
+        # not, we want to grab one from the first cert we have.
+        if not identities:
+            new_identity = Security.SecIdentityRef()
+            status = Security.SecIdentityCreateWithCertificate(
+                keychain,
+                certificates[0],
+                ctypes.byref(new_identity)
+            )
+            _assert_no_error(status)
+            identities.append(new_identity)
+
+            # We now want to release the original certificate, as we no longer
+            # need it.
+            CoreFoundation.CFRelease(certificates.pop(0))
+
+        # We now need to build a new CFArray that holds the trust chain.
+        trust_chain = CoreFoundation.CFArrayCreateMutable(
+            CoreFoundation.kCFAllocatorDefault,
+            0,
+            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+        )
+        for item in itertools.chain(identities, certificates):
+            # ArrayAppendValue does a CFRetain on the item. That's fine,
+            # because the finally block will release our other refs to them.
+            CoreFoundation.CFArrayAppendValue(trust_chain, item)
+
+        return trust_chain
+    finally:
+        for obj in itertools.chain(identities, certificates):
+            CoreFoundation.CFRelease(obj)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/appengine.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/appengine.py
new file mode 100644
index 00000000..9b42952d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/appengine.py
@@ -0,0 +1,289 @@
+"""
+This module provides a pool manager that uses Google App Engine's
+`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+Example usage::
+
+    from pip._vendor.urllib3 import PoolManager
+    from pip._vendor.urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox
+
+    if is_appengine_sandbox():
+        # AppEngineManager uses AppEngine's URLFetch API behind the scenes
+        http = AppEngineManager()
+    else:
+        # PoolManager uses a socket-level API behind the scenes
+        http = PoolManager()
+
+    r = http.request('GET', 'https://google.com/')
+
+There are `limitations <https://cloud.google.com/appengine/docs/python/\
+urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be
+the best choice for your application. There are three options for using
+urllib3 on Google App Engine:
+
+1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is
+   cost-effective in many circumstances as long as your usage is within the
+   limitations.
+2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets.
+   Sockets also have `limitations and restrictions
+   <https://cloud.google.com/appengine/docs/python/sockets/\
+   #limitations-and-restrictions>`_ and have a lower free quota than URLFetch.
+   To use sockets, be sure to specify the following in your ``app.yaml``::
+
+        env_variables:
+            GAE_USE_SOCKETS_HTTPLIB : 'true'
+
+3. If you are using `App Engine Flexible
+<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard
+:class:`PoolManager` without any configuration or special environment variables.
+"""
+
+from __future__ import absolute_import
+import io
+import logging
+import warnings
+from ..packages.six.moves.urllib.parse import urljoin
+
+from ..exceptions import (
+    HTTPError,
+    HTTPWarning,
+    MaxRetryError,
+    ProtocolError,
+    TimeoutError,
+    SSLError
+)
+
+from ..request import RequestMethods
+from ..response import HTTPResponse
+from ..util.timeout import Timeout
+from ..util.retry import Retry
+from . import _appengine_environ
+
+try:
+    from google.appengine.api import urlfetch
+except ImportError:
+    urlfetch = None
+
+
+log = logging.getLogger(__name__)
+
+
+class AppEnginePlatformWarning(HTTPWarning):
+    pass
+
+
+class AppEnginePlatformError(HTTPError):
+    pass
+
+
+class AppEngineManager(RequestMethods):
+    """
+    Connection manager for Google App Engine sandbox applications.
+
+    This manager uses the URLFetch service directly instead of using the
+    emulated httplib, and is subject to URLFetch limitations as described in
+    the App Engine documentation `here
+    <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+    Notably it will raise an :class:`AppEnginePlatformError` if:
+        * URLFetch is not available.
+        * If you attempt to use this on App Engine Flexible, as full socket
+          support is available.
+        * If a request size is more than 10 megabytes.
+        * If a response size is more than 32 megabtyes.
+        * If you use an unsupported request method such as OPTIONS.
+
+    Beyond those cases, it will raise normal urllib3 errors.
+    """
+
+    def __init__(self, headers=None, retries=None, validate_certificate=True,
+                 urlfetch_retries=True):
+        if not urlfetch:
+            raise AppEnginePlatformError(
+                "URLFetch is not available in this environment.")
+
+        if is_prod_appengine_mvms():
+            raise AppEnginePlatformError(
+                "Use normal urllib3.PoolManager instead of AppEngineManager"
+                "on Managed VMs, as using URLFetch is not necessary in "
+                "this environment.")
+
+        warnings.warn(
+            "urllib3 is using URLFetch on Google App Engine sandbox instead "
+            "of sockets. To use sockets directly instead of URLFetch see "
+            "https://urllib3.readthedocs.io/en/latest/reference/urllib3.contrib.html.",
+            AppEnginePlatformWarning)
+
+        RequestMethods.__init__(self, headers)
+        self.validate_certificate = validate_certificate
+        self.urlfetch_retries = urlfetch_retries
+
+        self.retries = retries or Retry.DEFAULT
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def urlopen(self, method, url, body=None, headers=None,
+                retries=None, redirect=True, timeout=Timeout.DEFAULT_TIMEOUT,
+                **response_kw):
+
+        retries = self._get_retries(retries, redirect)
+
+        try:
+            follow_redirects = (
+                    redirect and
+                    retries.redirect != 0 and
+                    retries.total)
+            response = urlfetch.fetch(
+                url,
+                payload=body,
+                method=method,
+                headers=headers or {},
+                allow_truncated=False,
+                follow_redirects=self.urlfetch_retries and follow_redirects,
+                deadline=self._get_absolute_timeout(timeout),
+                validate_certificate=self.validate_certificate,
+            )
+        except urlfetch.DeadlineExceededError as e:
+            raise TimeoutError(self, e)
+
+        except urlfetch.InvalidURLError as e:
+            if 'too large' in str(e):
+                raise AppEnginePlatformError(
+                    "URLFetch request too large, URLFetch only "
+                    "supports requests up to 10mb in size.", e)
+            raise ProtocolError(e)
+
+        except urlfetch.DownloadError as e:
+            if 'Too many redirects' in str(e):
+                raise MaxRetryError(self, url, reason=e)
+            raise ProtocolError(e)
+
+        except urlfetch.ResponseTooLargeError as e:
+            raise AppEnginePlatformError(
+                "URLFetch response too large, URLFetch only supports"
+                "responses up to 32mb in size.", e)
+
+        except urlfetch.SSLCertificateError as e:
+            raise SSLError(e)
+
+        except urlfetch.InvalidMethodError as e:
+            raise AppEnginePlatformError(
+                "URLFetch does not support method: %s" % method, e)
+
+        http_response = self._urlfetch_response_to_http_response(
+            response, retries=retries, **response_kw)
+
+        # Handle redirect?
+        redirect_location = redirect and http_response.get_redirect_location()
+        if redirect_location:
+            # Check for redirect response
+            if (self.urlfetch_retries and retries.raise_on_redirect):
+                raise MaxRetryError(self, url, "too many redirects")
+            else:
+                if http_response.status == 303:
+                    method = 'GET'
+
+                try:
+                    retries = retries.increment(method, url, response=http_response, _pool=self)
+                except MaxRetryError:
+                    if retries.raise_on_redirect:
+                        raise MaxRetryError(self, url, "too many redirects")
+                    return http_response
+
+                retries.sleep_for_retry(http_response)
+                log.debug("Redirecting %s -> %s", url, redirect_location)
+                redirect_url = urljoin(url, redirect_location)
+                return self.urlopen(
+                    method, redirect_url, body, headers,
+                    retries=retries, redirect=redirect,
+                    timeout=timeout, **response_kw)
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(http_response.getheader('Retry-After'))
+        if retries.is_retry(method, http_response.status, has_retry_after):
+            retries = retries.increment(
+                method, url, response=http_response, _pool=self)
+            log.debug("Retry: %s", url)
+            retries.sleep(http_response)
+            return self.urlopen(
+                method, url,
+                body=body, headers=headers,
+                retries=retries, redirect=redirect,
+                timeout=timeout, **response_kw)
+
+        return http_response
+
+    def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw):
+
+        if is_prod_appengine():
+            # Production GAE handles deflate encoding automatically, but does
+            # not remove the encoding header.
+            content_encoding = urlfetch_resp.headers.get('content-encoding')
+
+            if content_encoding == 'deflate':
+                del urlfetch_resp.headers['content-encoding']
+
+        transfer_encoding = urlfetch_resp.headers.get('transfer-encoding')
+        # We have a full response's content,
+        # so let's make sure we don't report ourselves as chunked data.
+        if transfer_encoding == 'chunked':
+            encodings = transfer_encoding.split(",")
+            encodings.remove('chunked')
+            urlfetch_resp.headers['transfer-encoding'] = ','.join(encodings)
+
+        original_response = HTTPResponse(
+            # In order for decoding to work, we must present the content as
+            # a file-like object.
+            body=io.BytesIO(urlfetch_resp.content),
+            msg=urlfetch_resp.header_msg,
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            **response_kw
+        )
+
+        return HTTPResponse(
+            body=io.BytesIO(urlfetch_resp.content),
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            original_response=original_response,
+            **response_kw
+        )
+
+    def _get_absolute_timeout(self, timeout):
+        if timeout is Timeout.DEFAULT_TIMEOUT:
+            return None  # Defer to URLFetch's default.
+        if isinstance(timeout, Timeout):
+            if timeout._read is not None or timeout._connect is not None:
+                warnings.warn(
+                    "URLFetch does not support granular timeout settings, "
+                    "reverting to total or default URLFetch timeout.",
+                    AppEnginePlatformWarning)
+            return timeout.total
+        return timeout
+
+    def _get_retries(self, retries, redirect):
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(
+                retries, redirect=redirect, default=self.retries)
+
+        if retries.connect or retries.read or retries.redirect:
+            warnings.warn(
+                "URLFetch only supports total retries and does not "
+                "recognize connect, read, or redirect retry parameters.",
+                AppEnginePlatformWarning)
+
+        return retries
+
+
+# Alias methods from _appengine_environ to maintain public API interface.
+
+is_appengine = _appengine_environ.is_appengine
+is_appengine_sandbox = _appengine_environ.is_appengine_sandbox
+is_local_appengine = _appengine_environ.is_local_appengine
+is_prod_appengine = _appengine_environ.is_prod_appengine
+is_prod_appengine_mvms = _appengine_environ.is_prod_appengine_mvms
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
new file mode 100644
index 00000000..8ea127c5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
@@ -0,0 +1,111 @@
+"""
+NTLM authenticating pool, contributed by erikcederstran
+
+Issue #10, see: http://code.google.com/p/urllib3/issues/detail?id=10
+"""
+from __future__ import absolute_import
+
+from logging import getLogger
+from ntlm import ntlm
+
+from .. import HTTPSConnectionPool
+from ..packages.six.moves.http_client import HTTPSConnection
+
+
+log = getLogger(__name__)
+
+
+class NTLMConnectionPool(HTTPSConnectionPool):
+    """
+    Implements an NTLM authentication version of an urllib3 connection pool
+    """
+
+    scheme = 'https'
+
+    def __init__(self, user, pw, authurl, *args, **kwargs):
+        """
+        authurl is a random URL on the server that is protected by NTLM.
+        user is the Windows user, probably in the DOMAIN\\username format.
+        pw is the password for the user.
+        """
+        super(NTLMConnectionPool, self).__init__(*args, **kwargs)
+        self.authurl = authurl
+        self.rawuser = user
+        user_parts = user.split('\\', 1)
+        self.domain = user_parts[0].upper()
+        self.user = user_parts[1]
+        self.pw = pw
+
+    def _new_conn(self):
+        # Performs the NTLM handshake that secures the connection. The socket
+        # must be kept open while requests are performed.
+        self.num_connections += 1
+        log.debug('Starting NTLM HTTPS connection no. %d: https://%s%s',
+                  self.num_connections, self.host, self.authurl)
+
+        headers = {'Connection': 'Keep-Alive'}
+        req_header = 'Authorization'
+        resp_header = 'www-authenticate'
+
+        conn = HTTPSConnection(host=self.host, port=self.port)
+
+        # Send negotiation message
+        headers[req_header] = (
+            'NTLM %s' % ntlm.create_NTLM_NEGOTIATE_MESSAGE(self.rawuser))
+        log.debug('Request headers: %s', headers)
+        conn.request('GET', self.authurl, None, headers)
+        res = conn.getresponse()
+        reshdr = dict(res.getheaders())
+        log.debug('Response status: %s %s', res.status, res.reason)
+        log.debug('Response headers: %s', reshdr)
+        log.debug('Response data: %s [...]', res.read(100))
+
+        # Remove the reference to the socket, so that it can not be closed by
+        # the response object (we want to keep the socket open)
+        res.fp = None
+
+        # Server should respond with a challenge message
+        auth_header_values = reshdr[resp_header].split(', ')
+        auth_header_value = None
+        for s in auth_header_values:
+            if s[:5] == 'NTLM ':
+                auth_header_value = s[5:]
+        if auth_header_value is None:
+            raise Exception('Unexpected %s response header: %s' %
+                            (resp_header, reshdr[resp_header]))
+
+        # Send authentication message
+        ServerChallenge, NegotiateFlags = \
+            ntlm.parse_NTLM_CHALLENGE_MESSAGE(auth_header_value)
+        auth_msg = ntlm.create_NTLM_AUTHENTICATE_MESSAGE(ServerChallenge,
+                                                         self.user,
+                                                         self.domain,
+                                                         self.pw,
+                                                         NegotiateFlags)
+        headers[req_header] = 'NTLM %s' % auth_msg
+        log.debug('Request headers: %s', headers)
+        conn.request('GET', self.authurl, None, headers)
+        res = conn.getresponse()
+        log.debug('Response status: %s %s', res.status, res.reason)
+        log.debug('Response headers: %s', dict(res.getheaders()))
+        log.debug('Response data: %s [...]', res.read()[:100])
+        if res.status != 200:
+            if res.status == 401:
+                raise Exception('Server rejected request: wrong '
+                                'username or password')
+            raise Exception('Wrong server response: %s %s' %
+                            (res.status, res.reason))
+
+        res.fp = None
+        log.debug('Connection established')
+        return conn
+
+    def urlopen(self, method, url, body=None, headers=None, retries=3,
+                redirect=True, assert_same_host=True):
+        if headers is None:
+            headers = {}
+        headers['Connection'] = 'Keep-Alive'
+        return super(NTLMConnectionPool, self).urlopen(method, url, body,
+                                                       headers, retries,
+                                                       redirect,
+                                                       assert_same_host)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
new file mode 100644
index 00000000..abfc3191
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
@@ -0,0 +1,485 @@
+"""
+SSL with SNI_-support for Python 2. Follow these instructions if you would
+like to verify SSL certificates in Python 2. Note, the default libraries do
+*not* do certificate checking; you need to do additional work to validate
+certificates yourself.
+
+This needs the following packages installed:
+
+* pyOpenSSL (tested with 16.0.0)
+* cryptography (minimum 1.3.4, from pyopenssl)
+* idna (minimum 2.0, from cryptography)
+
+However, pyopenssl depends on cryptography, which depends on idna, so while we
+use all three directly here we end up having relatively few packages required.
+
+You can install them with the following command:
+
+    pip install pyopenssl cryptography idna
+
+To activate certificate checking, call
+:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
+before you begin making HTTP requests. This can be done in a ``sitecustomize``
+module, or at any other time before your application begins using ``urllib3``,
+like this::
+
+    try:
+        import urllib3.contrib.pyopenssl
+        urllib3.contrib.pyopenssl.inject_into_urllib3()
+    except ImportError:
+        pass
+
+Now you can use :mod:`urllib3` as you normally would, and it will support SNI
+when the required modules are installed.
+
+Activating this module also has the positive side effect of disabling SSL/TLS
+compression in Python 2 (see `CRIME attack`_).
+
+If you want to configure the default list of supported cipher suites, you can
+set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable.
+
+.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
+.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
+"""
+from __future__ import absolute_import
+
+import OpenSSL.SSL
+from cryptography import x509
+from cryptography.hazmat.backends.openssl import backend as openssl_backend
+from cryptography.hazmat.backends.openssl.x509 import _Certificate
+try:
+    from cryptography.x509 import UnsupportedExtension
+except ImportError:
+    # UnsupportedExtension is gone in cryptography >= 2.1.0
+    class UnsupportedExtension(Exception):
+        pass
+
+from socket import timeout, error as SocketError
+from io import BytesIO
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+import logging
+import ssl
+from ..packages import six
+import sys
+
+from .. import util
+
+
+__all__ = ['inject_into_urllib3', 'extract_from_urllib3']
+
+# SNI always works.
+HAS_SNI = True
+
+# Map from urllib3 to PyOpenSSL compatible parameter-values.
+_openssl_versions = {
+    util.PROTOCOL_TLS: OpenSSL.SSL.SSLv23_METHOD,
+    ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
+}
+
+if hasattr(ssl, 'PROTOCOL_SSLv3') and hasattr(OpenSSL.SSL, 'SSLv3_METHOD'):
+    _openssl_versions[ssl.PROTOCOL_SSLv3] = OpenSSL.SSL.SSLv3_METHOD
+
+if hasattr(ssl, 'PROTOCOL_TLSv1_1') and hasattr(OpenSSL.SSL, 'TLSv1_1_METHOD'):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
+
+if hasattr(ssl, 'PROTOCOL_TLSv1_2') and hasattr(OpenSSL.SSL, 'TLSv1_2_METHOD'):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
+
+
+_stdlib_to_openssl_verify = {
+    ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
+    ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
+    ssl.CERT_REQUIRED:
+        OpenSSL.SSL.VERIFY_PEER + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
+}
+_openssl_to_stdlib_verify = dict(
+    (v, k) for k, v in _stdlib_to_openssl_verify.items()
+)
+
+# OpenSSL will only write 16K at a time
+SSL_WRITE_BLOCKSIZE = 16384
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+
+log = logging.getLogger(__name__)
+
+
+def inject_into_urllib3():
+    'Monkey-patch urllib3 with PyOpenSSL-backed SSL-support.'
+
+    _validate_dependencies_met()
+
+    util.SSLContext = PyOpenSSLContext
+    util.ssl_.SSLContext = PyOpenSSLContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_PYOPENSSL = True
+    util.ssl_.IS_PYOPENSSL = True
+
+
+def extract_from_urllib3():
+    'Undo monkey-patching by :func:`inject_into_urllib3`.'
+
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_PYOPENSSL = False
+    util.ssl_.IS_PYOPENSSL = False
+
+
+def _validate_dependencies_met():
+    """
+    Verifies that PyOpenSSL's package-level dependencies have been met.
+    Throws `ImportError` if they are not met.
+    """
+    # Method added in `cryptography==1.1`; not available in older versions
+    from cryptography.x509.extensions import Extensions
+    if getattr(Extensions, "get_extension_for_class", None) is None:
+        raise ImportError("'cryptography' module missing required functionality.  "
+                          "Try upgrading to v1.3.4 or newer.")
+
+    # pyOpenSSL 0.14 and above use cryptography for OpenSSL bindings. The _x509
+    # attribute is only present on those versions.
+    from OpenSSL.crypto import X509
+    x509 = X509()
+    if getattr(x509, "_x509", None) is None:
+        raise ImportError("'pyOpenSSL' module missing required functionality. "
+                          "Try upgrading to v0.14 or newer.")
+
+
+def _dnsname_to_stdlib(name):
+    """
+    Converts a dNSName SubjectAlternativeName field to the form used by the
+    standard library on the given Python version.
+
+    Cryptography produces a dNSName as a unicode string that was idna-decoded
+    from ASCII bytes. We need to idna-encode that string to get it back, and
+    then on Python 3 we also need to convert to unicode via UTF-8 (the stdlib
+    uses PyUnicode_FromStringAndSize on it, which decodes via UTF-8).
+
+    If the name cannot be idna-encoded then we return None signalling that
+    the name given should be skipped.
+    """
+    def idna_encode(name):
+        """
+        Borrowed wholesale from the Python Cryptography Project. It turns out
+        that we can't just safely call `idna.encode`: it can explode for
+        wildcard names. This avoids that problem.
+        """
+        from pip._vendor import idna
+
+        try:
+            for prefix in [u'*.', u'.']:
+                if name.startswith(prefix):
+                    name = name[len(prefix):]
+                    return prefix.encode('ascii') + idna.encode(name)
+            return idna.encode(name)
+        except idna.core.IDNAError:
+            return None
+
+    # Don't send IPv6 addresses through the IDNA encoder.
+    if ':' in name:
+        return name
+
+    name = idna_encode(name)
+    if name is None:
+        return None
+    elif sys.version_info >= (3, 0):
+        name = name.decode('utf-8')
+    return name
+
+
+def get_subj_alt_name(peer_cert):
+    """
+    Given an PyOpenSSL certificate, provides all the subject alternative names.
+    """
+    # Pass the cert to cryptography, which has much better APIs for this.
+    if hasattr(peer_cert, "to_cryptography"):
+        cert = peer_cert.to_cryptography()
+    else:
+        # This is technically using private APIs, but should work across all
+        # relevant versions before PyOpenSSL got a proper API for this.
+        cert = _Certificate(openssl_backend, peer_cert._x509)
+
+    # We want to find the SAN extension. Ask Cryptography to locate it (it's
+    # faster than looping in Python)
+    try:
+        ext = cert.extensions.get_extension_for_class(
+            x509.SubjectAlternativeName
+        ).value
+    except x509.ExtensionNotFound:
+        # No such extension, return the empty list.
+        return []
+    except (x509.DuplicateExtension, UnsupportedExtension,
+            x509.UnsupportedGeneralNameType, UnicodeError) as e:
+        # A problem has been found with the quality of the certificate. Assume
+        # no SAN field is present.
+        log.warning(
+            "A problem was encountered with the certificate that prevented "
+            "urllib3 from finding the SubjectAlternativeName field. This can "
+            "affect certificate validation. The error was %s",
+            e,
+        )
+        return []
+
+    # We want to return dNSName and iPAddress fields. We need to cast the IPs
+    # back to strings because the match_hostname function wants them as
+    # strings.
+    # Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
+    # decoded. This is pretty frustrating, but that's what the standard library
+    # does with certificates, and so we need to attempt to do the same.
+    # We also want to skip over names which cannot be idna encoded.
+    names = [
+        ('DNS', name) for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
+        if name is not None
+    ]
+    names.extend(
+        ('IP Address', str(name))
+        for name in ext.get_values_for_type(x509.IPAddress)
+    )
+
+    return names
+
+
+class WrappedSocket(object):
+    '''API-compatibility wrapper for Python OpenSSL's Connection-class.
+
+    Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
+    collector of pypy.
+    '''
+
+    def __init__(self, connection, socket, suppress_ragged_eofs=True):
+        self.connection = connection
+        self.socket = socket
+        self.suppress_ragged_eofs = suppress_ragged_eofs
+        self._makefile_refs = 0
+        self._closed = False
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, *args, **kwargs):
+        try:
+            data = self.connection.recv(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
+                return b''
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return b''
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout('The read operation timed out')
+            else:
+                return self.recv(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+        else:
+            return data
+
+    def recv_into(self, *args, **kwargs):
+        try:
+            return self.connection.recv_into(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
+                return 0
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return 0
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout('The read operation timed out')
+            else:
+                return self.recv_into(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+
+    def settimeout(self, timeout):
+        return self.socket.settimeout(timeout)
+
+    def _send_until_done(self, data):
+        while True:
+            try:
+                return self.connection.send(data)
+            except OpenSSL.SSL.WantWriteError:
+                if not util.wait_for_write(self.socket, self.socket.gettimeout()):
+                    raise timeout()
+                continue
+            except OpenSSL.SSL.SysCallError as e:
+                raise SocketError(str(e))
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
+            total_sent += sent
+
+    def shutdown(self):
+        # FIXME rethrow compatible exceptions should we ever use this
+        self.connection.shutdown()
+
+    def close(self):
+        if self._makefile_refs < 1:
+            try:
+                self._closed = True
+                return self.connection.close()
+            except OpenSSL.SSL.Error:
+                return
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        x509 = self.connection.get_peer_certificate()
+
+        if not x509:
+            return x509
+
+        if binary_form:
+            return OpenSSL.crypto.dump_certificate(
+                OpenSSL.crypto.FILETYPE_ASN1,
+                x509)
+
+        return {
+            'subject': (
+                (('commonName', x509.get_subject().CN),),
+            ),
+            'subjectAltName': get_subj_alt_name(x509)
+        }
+
+    def version(self):
+        return self.connection.get_protocol_version_name()
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+else:  # Platform-specific: Python 3
+    makefile = backport_makefile
+
+WrappedSocket.makefile = makefile
+
+
+class PyOpenSSLContext(object):
+    """
+    I am a wrapper class for the PyOpenSSL ``Context`` object. I am responsible
+    for translating the interface of the standard library ``SSLContext`` object
+    to calls into PyOpenSSL.
+    """
+    def __init__(self, protocol):
+        self.protocol = _openssl_versions[protocol]
+        self._ctx = OpenSSL.SSL.Context(self.protocol)
+        self._options = 0
+        self.check_hostname = False
+
+    @property
+    def options(self):
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        self._options = value
+        self._ctx.set_options(value)
+
+    @property
+    def verify_mode(self):
+        return _openssl_to_stdlib_verify[self._ctx.get_verify_mode()]
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._ctx.set_verify(
+            _stdlib_to_openssl_verify[value],
+            _verify_callback
+        )
+
+    def set_default_verify_paths(self):
+        self._ctx.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        if isinstance(ciphers, six.text_type):
+            ciphers = ciphers.encode('utf-8')
+        self._ctx.set_cipher_list(ciphers)
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        if cafile is not None:
+            cafile = cafile.encode('utf-8')
+        if capath is not None:
+            capath = capath.encode('utf-8')
+        self._ctx.load_verify_locations(cafile, capath)
+        if cadata is not None:
+            self._ctx.load_verify_locations(BytesIO(cadata))
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._ctx.use_certificate_chain_file(certfile)
+        if password is not None:
+            if not isinstance(password, six.binary_type):
+                password = password.encode('utf-8')
+            self._ctx.set_passwd_cb(lambda *_: password)
+        self._ctx.use_privatekey_file(keyfile or certfile)
+
+    def wrap_socket(self, sock, server_side=False,
+                    do_handshake_on_connect=True, suppress_ragged_eofs=True,
+                    server_hostname=None):
+        cnx = OpenSSL.SSL.Connection(self._ctx, sock)
+
+        if isinstance(server_hostname, six.text_type):  # Platform-specific: Python 3
+            server_hostname = server_hostname.encode('utf-8')
+
+        if server_hostname is not None:
+            cnx.set_tlsext_host_name(server_hostname)
+
+        cnx.set_connect_state()
+
+        while True:
+            try:
+                cnx.do_handshake()
+            except OpenSSL.SSL.WantReadError:
+                if not util.wait_for_read(sock, sock.gettimeout()):
+                    raise timeout('select timed out')
+                continue
+            except OpenSSL.SSL.Error as e:
+                raise ssl.SSLError('bad handshake: %r' % e)
+            break
+
+        return WrappedSocket(cnx, sock)
+
+
+def _verify_callback(cnx, x509, err_no, err_depth, return_code):
+    return err_no == 0
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/securetransport.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
new file mode 100644
index 00000000..4dc48484
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
@@ -0,0 +1,853 @@
+"""
+SecureTranport support for urllib3 via ctypes.
+
+This makes platform-native TLS available to urllib3 users on macOS without the
+use of a compiler. This is an important feature because the Python Package
+Index is moving to become a TLSv1.2-or-higher server, and the default OpenSSL
+that ships with macOS is not capable of doing TLSv1.2. The only way to resolve
+this is to give macOS users an alternative solution to the problem, and that
+solution is to use SecureTransport.
+
+We use ctypes here because this solution must not require a compiler. That's
+because pip is not allowed to require a compiler either.
+
+This is not intended to be a seriously long-term solution to this problem.
+The hope is that PEP 543 will eventually solve this issue for us, at which
+point we can retire this contrib module. But in the short term, we need to
+solve the impending tire fire that is Python on Mac without this kind of
+contrib module. So...here we are.
+
+To use this module, simply import and inject it::
+
+    import urllib3.contrib.securetransport
+    urllib3.contrib.securetransport.inject_into_urllib3()
+
+Happy TLSing!
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import contextlib
+import ctypes
+import errno
+import os.path
+import shutil
+import socket
+import ssl
+import threading
+import weakref
+
+from .. import util
+from ._securetransport.bindings import (
+    Security, SecurityConst, CoreFoundation
+)
+from ._securetransport.low_level import (
+    _assert_no_error, _cert_array_from_pem, _temporary_keychain,
+    _load_client_cert_chain
+)
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+__all__ = ['inject_into_urllib3', 'extract_from_urllib3']
+
+# SNI always works
+HAS_SNI = True
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+# This dictionary is used by the read callback to obtain a handle to the
+# calling wrapped socket. This is a pretty silly approach, but for now it'll
+# do. I feel like I should be able to smuggle a handle to the wrapped socket
+# directly in the SSLConnectionRef, but for now this approach will work I
+# guess.
+#
+# We need to lock around this structure for inserts, but we don't do it for
+# reads/writes in the callbacks. The reasoning here goes as follows:
+#
+#    1. It is not possible to call into the callbacks before the dictionary is
+#       populated, so once in the callback the id must be in the dictionary.
+#    2. The callbacks don't mutate the dictionary, they only read from it, and
+#       so cannot conflict with any of the insertions.
+#
+# This is good: if we had to lock in the callbacks we'd drastically slow down
+# the performance of this code.
+_connection_refs = weakref.WeakValueDictionary()
+_connection_ref_lock = threading.Lock()
+
+# Limit writes to 16kB. This is OpenSSL's limit, but we'll cargo-cult it over
+# for no better reason than we need *a* limit, and this one is right there.
+SSL_WRITE_BLOCKSIZE = 16384
+
+# This is our equivalent of util.ssl_.DEFAULT_CIPHERS, but expanded out to
+# individual cipher suites. We need to do this because this is how
+# SecureTransport wants them.
+CIPHER_SUITES = [
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_AES_256_GCM_SHA384,
+    SecurityConst.TLS_AES_128_GCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_AES_128_CCM_8_SHA256,
+    SecurityConst.TLS_AES_128_CCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA,
+]
+
+# Basically this is simple: for PROTOCOL_SSLv23 we turn it into a low of
+# TLSv1 and a high of TLSv1.3. For everything else, we pin to that version.
+# TLSv1 to 1.2 are supported on macOS 10.8+ and TLSv1.3 is macOS 10.13+
+_protocol_to_min_max = {
+    util.PROTOCOL_TLS: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocolMaxSupported),
+}
+
+if hasattr(ssl, "PROTOCOL_SSLv2"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv2] = (
+        SecurityConst.kSSLProtocol2, SecurityConst.kSSLProtocol2
+    )
+if hasattr(ssl, "PROTOCOL_SSLv3"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv3] = (
+        SecurityConst.kSSLProtocol3, SecurityConst.kSSLProtocol3
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1] = (
+        SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol1
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_1] = (
+        SecurityConst.kTLSProtocol11, SecurityConst.kTLSProtocol11
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_2"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_2] = (
+        SecurityConst.kTLSProtocol12, SecurityConst.kTLSProtocol12
+    )
+
+
+def inject_into_urllib3():
+    """
+    Monkey-patch urllib3 with SecureTransport-backed SSL-support.
+    """
+    util.SSLContext = SecureTransportContext
+    util.ssl_.SSLContext = SecureTransportContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_SECURETRANSPORT = True
+    util.ssl_.IS_SECURETRANSPORT = True
+
+
+def extract_from_urllib3():
+    """
+    Undo monkey-patching by :func:`inject_into_urllib3`.
+    """
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_SECURETRANSPORT = False
+    util.ssl_.IS_SECURETRANSPORT = False
+
+
+def _read_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport read callback. This is called by ST to request that data
+    be returned from the socket.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        requested_length = data_length_pointer[0]
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        read_count = 0
+
+        try:
+            while read_count < requested_length:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_read(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, 'timed out')
+
+                remaining = requested_length - read_count
+                buffer = (ctypes.c_char * remaining).from_address(
+                    data_buffer + read_count
+                )
+                chunk_size = base_socket.recv_into(buffer, remaining)
+                read_count += chunk_size
+                if not chunk_size:
+                    if not read_count:
+                        return SecurityConst.errSSLClosedGraceful
+                    break
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = read_count
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = read_count
+
+        if read_count != requested_length:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+def _write_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport write callback. This is called by ST to request that data
+    actually be sent on the network.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        bytes_to_write = data_length_pointer[0]
+        data = ctypes.string_at(data_buffer, bytes_to_write)
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        sent = 0
+
+        try:
+            while sent < bytes_to_write:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_write(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, 'timed out')
+                chunk_sent = base_socket.send(data)
+                sent += chunk_sent
+
+                # This has some needless copying here, but I'm not sure there's
+                # much value in optimising this data path.
+                data = data[chunk_sent:]
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = sent
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = sent
+
+        if sent != bytes_to_write:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+# We need to keep these two objects references alive: if they get GC'd while
+# in use then SecureTransport could attempt to call a function that is in freed
+# memory. That would be...uh...bad. Yeah, that's the word. Bad.
+_read_callback_pointer = Security.SSLReadFunc(_read_callback)
+_write_callback_pointer = Security.SSLWriteFunc(_write_callback)
+
+
+class WrappedSocket(object):
+    """
+    API-compatibility wrapper for Python's OpenSSL wrapped socket object.
+
+    Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage
+    collector of PyPy.
+    """
+    def __init__(self, socket):
+        self.socket = socket
+        self.context = None
+        self._makefile_refs = 0
+        self._closed = False
+        self._exception = None
+        self._keychain = None
+        self._keychain_dir = None
+        self._client_cert_chain = None
+
+        # We save off the previously-configured timeout and then set it to
+        # zero. This is done because we use select and friends to handle the
+        # timeouts, but if we leave the timeout set on the lower socket then
+        # Python will "kindly" call select on that socket again for us. Avoid
+        # that by forcing the timeout to zero.
+        self._timeout = self.socket.gettimeout()
+        self.socket.settimeout(0)
+
+    @contextlib.contextmanager
+    def _raise_on_error(self):
+        """
+        A context manager that can be used to wrap calls that do I/O from
+        SecureTransport. If any of the I/O callbacks hit an exception, this
+        context manager will correctly propagate the exception after the fact.
+        This avoids silently swallowing those exceptions.
+
+        It also correctly forces the socket closed.
+        """
+        self._exception = None
+
+        # We explicitly don't catch around this yield because in the unlikely
+        # event that an exception was hit in the block we don't want to swallow
+        # it.
+        yield
+        if self._exception is not None:
+            exception, self._exception = self._exception, None
+            self.close()
+            raise exception
+
+    def _set_ciphers(self):
+        """
+        Sets up the allowed ciphers. By default this matches the set in
+        util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
+        custom and doesn't allow changing at this time, mostly because parsing
+        OpenSSL cipher strings is going to be a freaking nightmare.
+        """
+        ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
+        result = Security.SSLSetEnabledCiphers(
+            self.context, ciphers, len(CIPHER_SUITES)
+        )
+        _assert_no_error(result)
+
+    def _custom_validate(self, verify, trust_bundle):
+        """
+        Called when we have set custom validation. We do this in two cases:
+        first, when cert validation is entirely disabled; and second, when
+        using a custom trust DB.
+        """
+        # If we disabled cert validation, just say: cool.
+        if not verify:
+            return
+
+        # We want data in memory, so load it up.
+        if os.path.isfile(trust_bundle):
+            with open(trust_bundle, 'rb') as f:
+                trust_bundle = f.read()
+
+        cert_array = None
+        trust = Security.SecTrustRef()
+
+        try:
+            # Get a CFArray that contains the certs we want.
+            cert_array = _cert_array_from_pem(trust_bundle)
+
+            # Ok, now the hard part. We want to get the SecTrustRef that ST has
+            # created for this connection, shove our CAs into it, tell ST to
+            # ignore everything else it knows, and then ask if it can build a
+            # chain. This is a buuuunch of code.
+            result = Security.SSLCopyPeerTrust(
+                self.context, ctypes.byref(trust)
+            )
+            _assert_no_error(result)
+            if not trust:
+                raise ssl.SSLError("Failed to copy trust reference")
+
+            result = Security.SecTrustSetAnchorCertificates(trust, cert_array)
+            _assert_no_error(result)
+
+            result = Security.SecTrustSetAnchorCertificatesOnly(trust, True)
+            _assert_no_error(result)
+
+            trust_result = Security.SecTrustResultType()
+            result = Security.SecTrustEvaluate(
+                trust, ctypes.byref(trust_result)
+            )
+            _assert_no_error(result)
+        finally:
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+            if cert_array is not None:
+                CoreFoundation.CFRelease(cert_array)
+
+        # Ok, now we can look at what the result was.
+        successes = (
+            SecurityConst.kSecTrustResultUnspecified,
+            SecurityConst.kSecTrustResultProceed
+        )
+        if trust_result.value not in successes:
+            raise ssl.SSLError(
+                "certificate verify failed, error code: %d" %
+                trust_result.value
+            )
+
+    def handshake(self,
+                  server_hostname,
+                  verify,
+                  trust_bundle,
+                  min_version,
+                  max_version,
+                  client_cert,
+                  client_key,
+                  client_key_passphrase):
+        """
+        Actually performs the TLS handshake. This is run automatically by
+        wrapped socket, and shouldn't be needed in user code.
+        """
+        # First, we do the initial bits of connection setup. We need to create
+        # a context, set its I/O funcs, and set the connection reference.
+        self.context = Security.SSLCreateContext(
+            None, SecurityConst.kSSLClientSide, SecurityConst.kSSLStreamType
+        )
+        result = Security.SSLSetIOFuncs(
+            self.context, _read_callback_pointer, _write_callback_pointer
+        )
+        _assert_no_error(result)
+
+        # Here we need to compute the handle to use. We do this by taking the
+        # id of self modulo 2**31 - 1. If this is already in the dictionary, we
+        # just keep incrementing by one until we find a free space.
+        with _connection_ref_lock:
+            handle = id(self) % 2147483647
+            while handle in _connection_refs:
+                handle = (handle + 1) % 2147483647
+            _connection_refs[handle] = self
+
+        result = Security.SSLSetConnection(self.context, handle)
+        _assert_no_error(result)
+
+        # If we have a server hostname, we should set that too.
+        if server_hostname:
+            if not isinstance(server_hostname, bytes):
+                server_hostname = server_hostname.encode('utf-8')
+
+            result = Security.SSLSetPeerDomainName(
+                self.context, server_hostname, len(server_hostname)
+            )
+            _assert_no_error(result)
+
+        # Setup the ciphers.
+        self._set_ciphers()
+
+        # Set the minimum and maximum TLS versions.
+        result = Security.SSLSetProtocolVersionMin(self.context, min_version)
+        _assert_no_error(result)
+
+        # TLS 1.3 isn't necessarily enabled by the OS
+        # so we have to detect when we error out and try
+        # setting TLS 1.3 if it's allowed. kTLSProtocolMaxSupported
+        # was added in macOS 10.13 along with kTLSProtocol13.
+        result = Security.SSLSetProtocolVersionMax(self.context, max_version)
+        if result != 0 and max_version == SecurityConst.kTLSProtocolMaxSupported:
+            result = Security.SSLSetProtocolVersionMax(self.context, SecurityConst.kTLSProtocol12)
+        _assert_no_error(result)
+
+        # If there's a trust DB, we need to use it. We do that by telling
+        # SecureTransport to break on server auth. We also do that if we don't
+        # want to validate the certs at all: we just won't actually do any
+        # authing in that case.
+        if not verify or trust_bundle is not None:
+            result = Security.SSLSetSessionOption(
+                self.context,
+                SecurityConst.kSSLSessionOptionBreakOnServerAuth,
+                True
+            )
+            _assert_no_error(result)
+
+        # If there's a client cert, we need to use it.
+        if client_cert:
+            self._keychain, self._keychain_dir = _temporary_keychain()
+            self._client_cert_chain = _load_client_cert_chain(
+                self._keychain, client_cert, client_key
+            )
+            result = Security.SSLSetCertificate(
+                self.context, self._client_cert_chain
+            )
+            _assert_no_error(result)
+
+        while True:
+            with self._raise_on_error():
+                result = Security.SSLHandshake(self.context)
+
+                if result == SecurityConst.errSSLWouldBlock:
+                    raise socket.timeout("handshake timed out")
+                elif result == SecurityConst.errSSLServerAuthCompleted:
+                    self._custom_validate(verify, trust_bundle)
+                    continue
+                else:
+                    _assert_no_error(result)
+                    break
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, bufsiz):
+        buffer = ctypes.create_string_buffer(bufsiz)
+        bytes_read = self.recv_into(buffer, bufsiz)
+        data = buffer[:bytes_read]
+        return data
+
+    def recv_into(self, buffer, nbytes=None):
+        # Read short on EOF.
+        if self._closed:
+            return 0
+
+        if nbytes is None:
+            nbytes = len(buffer)
+
+        buffer = (ctypes.c_char * nbytes).from_buffer(buffer)
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLRead(
+                self.context, buffer, nbytes, ctypes.byref(processed_bytes)
+            )
+
+        # There are some result codes that we want to treat as "not always
+        # errors". Specifically, those are errSSLWouldBlock,
+        # errSSLClosedGraceful, and errSSLClosedNoNotify.
+        if (result == SecurityConst.errSSLWouldBlock):
+            # If we didn't process any bytes, then this was just a time out.
+            # However, we can get errSSLWouldBlock in situations when we *did*
+            # read some data, and in those cases we should just read "short"
+            # and return.
+            if processed_bytes.value == 0:
+                # Timed out, no data read.
+                raise socket.timeout("recv timed out")
+        elif result in (SecurityConst.errSSLClosedGraceful, SecurityConst.errSSLClosedNoNotify):
+            # The remote peer has closed this connection. We should do so as
+            # well. Note that we don't actually return here because in
+            # principle this could actually be fired along with return data.
+            # It's unlikely though.
+            self.close()
+        else:
+            _assert_no_error(result)
+
+        # Ok, we read and probably succeeded. We should return whatever data
+        # was actually read.
+        return processed_bytes.value
+
+    def settimeout(self, timeout):
+        self._timeout = timeout
+
+    def gettimeout(self):
+        return self._timeout
+
+    def send(self, data):
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLWrite(
+                self.context, data, len(data), ctypes.byref(processed_bytes)
+            )
+
+        if result == SecurityConst.errSSLWouldBlock and processed_bytes.value == 0:
+            # Timed out
+            raise socket.timeout("send timed out")
+        else:
+            _assert_no_error(result)
+
+        # We sent, and probably succeeded. Tell them how much we sent.
+        return processed_bytes.value
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self.send(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
+            total_sent += sent
+
+    def shutdown(self):
+        with self._raise_on_error():
+            Security.SSLClose(self.context)
+
+    def close(self):
+        # TODO: should I do clean shutdown here? Do I have to?
+        if self._makefile_refs < 1:
+            self._closed = True
+            if self.context:
+                CoreFoundation.CFRelease(self.context)
+                self.context = None
+            if self._client_cert_chain:
+                CoreFoundation.CFRelease(self._client_cert_chain)
+                self._client_cert_chain = None
+            if self._keychain:
+                Security.SecKeychainDelete(self._keychain)
+                CoreFoundation.CFRelease(self._keychain)
+                shutil.rmtree(self._keychain_dir)
+                self._keychain = self._keychain_dir = None
+            return self.socket.close()
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        # Urgh, annoying.
+        #
+        # Here's how we do this:
+        #
+        # 1. Call SSLCopyPeerTrust to get hold of the trust object for this
+        #    connection.
+        # 2. Call SecTrustGetCertificateAtIndex for index 0 to get the leaf.
+        # 3. To get the CN, call SecCertificateCopyCommonName and process that
+        #    string so that it's of the appropriate type.
+        # 4. To get the SAN, we need to do something a bit more complex:
+        #    a. Call SecCertificateCopyValues to get the data, requesting
+        #       kSecOIDSubjectAltName.
+        #    b. Mess about with this dictionary to try to get the SANs out.
+        #
+        # This is gross. Really gross. It's going to be a few hundred LoC extra
+        # just to repeat something that SecureTransport can *already do*. So my
+        # operating assumption at this time is that what we want to do is
+        # instead to just flag to urllib3 that it shouldn't do its own hostname
+        # validation when using SecureTransport.
+        if not binary_form:
+            raise ValueError(
+                "SecureTransport only supports dumping binary certs"
+            )
+        trust = Security.SecTrustRef()
+        certdata = None
+        der_bytes = None
+
+        try:
+            # Grab the trust store.
+            result = Security.SSLCopyPeerTrust(
+                self.context, ctypes.byref(trust)
+            )
+            _assert_no_error(result)
+            if not trust:
+                # Probably we haven't done the handshake yet. No biggie.
+                return None
+
+            cert_count = Security.SecTrustGetCertificateCount(trust)
+            if not cert_count:
+                # Also a case that might happen if we haven't handshaked.
+                # Handshook? Handshaken?
+                return None
+
+            leaf = Security.SecTrustGetCertificateAtIndex(trust, 0)
+            assert leaf
+
+            # Ok, now we want the DER bytes.
+            certdata = Security.SecCertificateCopyData(leaf)
+            assert certdata
+
+            data_length = CoreFoundation.CFDataGetLength(certdata)
+            data_buffer = CoreFoundation.CFDataGetBytePtr(certdata)
+            der_bytes = ctypes.string_at(data_buffer, data_length)
+        finally:
+            if certdata:
+                CoreFoundation.CFRelease(certdata)
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+        return der_bytes
+
+    def version(self):
+        protocol = Security.SSLProtocol()
+        result = Security.SSLGetNegotiatedProtocolVersion(self.context, ctypes.byref(protocol))
+        _assert_no_error(result)
+        if protocol.value == SecurityConst.kTLSProtocol13:
+            return 'TLSv1.3'
+        elif protocol.value == SecurityConst.kTLSProtocol12:
+            return 'TLSv1.2'
+        elif protocol.value == SecurityConst.kTLSProtocol11:
+            return 'TLSv1.1'
+        elif protocol.value == SecurityConst.kTLSProtocol1:
+            return 'TLSv1'
+        elif protocol.value == SecurityConst.kSSLProtocol3:
+            return 'SSLv3'
+        elif protocol.value == SecurityConst.kSSLProtocol2:
+            return 'SSLv2'
+        else:
+            raise ssl.SSLError('Unknown TLS version: %r' % protocol)
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+else:  # Platform-specific: Python 3
+    def makefile(self, mode="r", buffering=None, *args, **kwargs):
+        # We disable buffering with SecureTransport because it conflicts with
+        # the buffering that ST does internally (see issue #1153 for more).
+        buffering = 0
+        return backport_makefile(self, mode, buffering, *args, **kwargs)
+
+WrappedSocket.makefile = makefile
+
+
+class SecureTransportContext(object):
+    """
+    I am a wrapper class for the SecureTransport library, to translate the
+    interface of the standard library ``SSLContext`` object to calls into
+    SecureTransport.
+    """
+    def __init__(self, protocol):
+        self._min_version, self._max_version = _protocol_to_min_max[protocol]
+        self._options = 0
+        self._verify = False
+        self._trust_bundle = None
+        self._client_cert = None
+        self._client_key = None
+        self._client_key_passphrase = None
+
+    @property
+    def check_hostname(self):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        return True
+
+    @check_hostname.setter
+    def check_hostname(self, value):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        pass
+
+    @property
+    def options(self):
+        # TODO: Well, crap.
+        #
+        # So this is the bit of the code that is the most likely to cause us
+        # trouble. Essentially we need to enumerate all of the SSL options that
+        # users might want to use and try to see if we can sensibly translate
+        # them, or whether we should just ignore them.
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        # TODO: Update in line with above.
+        self._options = value
+
+    @property
+    def verify_mode(self):
+        return ssl.CERT_REQUIRED if self._verify else ssl.CERT_NONE
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._verify = True if value == ssl.CERT_REQUIRED else False
+
+    def set_default_verify_paths(self):
+        # So, this has to do something a bit weird. Specifically, what it does
+        # is nothing.
+        #
+        # This means that, if we had previously had load_verify_locations
+        # called, this does not undo that. We need to do that because it turns
+        # out that the rest of the urllib3 code will attempt to load the
+        # default verify paths if it hasn't been told about any paths, even if
+        # the context itself was sometime earlier. We resolve that by just
+        # ignoring it.
+        pass
+
+    def load_default_certs(self):
+        return self.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        # For now, we just require the default cipher string.
+        if ciphers != util.ssl_.DEFAULT_CIPHERS:
+            raise ValueError(
+                "SecureTransport doesn't support custom cipher strings"
+            )
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        # OK, we only really support cadata and cafile.
+        if capath is not None:
+            raise ValueError(
+                "SecureTransport does not support cert directories"
+            )
+
+        self._trust_bundle = cafile or cadata
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._client_cert = certfile
+        self._client_key = keyfile
+        self._client_cert_passphrase = password
+
+    def wrap_socket(self, sock, server_side=False,
+                    do_handshake_on_connect=True, suppress_ragged_eofs=True,
+                    server_hostname=None):
+        # So, what do we do here? Firstly, we assert some properties. This is a
+        # stripped down shim, so there is some functionality we don't support.
+        # See PEP 543 for the real deal.
+        assert not server_side
+        assert do_handshake_on_connect
+        assert suppress_ragged_eofs
+
+        # Ok, we're good to go. Now we want to create the wrapped socket object
+        # and store it in the appropriate place.
+        wrapped_socket = WrappedSocket(sock)
+
+        # Now we can handshake
+        wrapped_socket.handshake(
+            server_hostname, self._verify, self._trust_bundle,
+            self._min_version, self._max_version, self._client_cert,
+            self._client_key, self._client_key_passphrase
+        )
+        return wrapped_socket
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/socks.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/socks.py
new file mode 100644
index 00000000..636d261f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/contrib/socks.py
@@ -0,0 +1,205 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains provisional support for SOCKS proxies from within
+urllib3. This module supports SOCKS4, SOCKS4A (an extension of SOCKS4), and
+SOCKS5. To enable its functionality, either install PySocks or install this
+module with the ``socks`` extra.
+
+The SOCKS implementation supports the full range of urllib3 features. It also
+supports the following SOCKS features:
+
+- SOCKS4A (``proxy_url='socks4a://...``)
+- SOCKS4 (``proxy_url='socks4://...``)
+- SOCKS5 with remote DNS (``proxy_url='socks5h://...``)
+- SOCKS5 with local DNS (``proxy_url='socks5://...``)
+- Usernames and passwords for the SOCKS proxy
+
+ .. note::
+    It is recommended to use ``socks5h://`` or ``socks4a://`` schemes in
+    your ``proxy_url`` to ensure that DNS resolution is done from the remote
+    server instead of client-side when connecting to a domain name.
+
+SOCKS4 supports IPv4 and domain names with the SOCKS4A extension. SOCKS5
+supports IPv4, IPv6, and domain names.
+
+When connecting to a SOCKS4 proxy the ``username`` portion of the ``proxy_url``
+will be sent as the ``userid`` section of the SOCKS request::
+
+    proxy_url="socks4a://<userid>@proxy-host"
+
+When connecting to a SOCKS5 proxy the ``username`` and ``password`` portion
+of the ``proxy_url`` will be sent as the username/password to authenticate
+with the proxy::
+
+    proxy_url="socks5h://<username>:<password>@proxy-host"
+
+"""
+from __future__ import absolute_import
+
+try:
+    import socks
+except ImportError:
+    import warnings
+    from ..exceptions import DependencyWarning
+
+    warnings.warn((
+        'SOCKS support in urllib3 requires the installation of optional '
+        'dependencies: specifically, PySocks.  For more information, see '
+        'https://urllib3.readthedocs.io/en/latest/contrib.html#socks-proxies'
+        ),
+        DependencyWarning
+    )
+    raise
+
+from socket import error as SocketError, timeout as SocketTimeout
+
+from ..connection import (
+    HTTPConnection, HTTPSConnection
+)
+from ..connectionpool import (
+    HTTPConnectionPool, HTTPSConnectionPool
+)
+from ..exceptions import ConnectTimeoutError, NewConnectionError
+from ..poolmanager import PoolManager
+from ..util.url import parse_url
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+
+class SOCKSConnection(HTTPConnection):
+    """
+    A plain-text HTTP connection that connects via a SOCKS proxy.
+    """
+    def __init__(self, *args, **kwargs):
+        self._socks_options = kwargs.pop('_socks_options')
+        super(SOCKSConnection, self).__init__(*args, **kwargs)
+
+    def _new_conn(self):
+        """
+        Establish a new connection via the SOCKS proxy.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw['source_address'] = self.source_address
+
+        if self.socket_options:
+            extra_kw['socket_options'] = self.socket_options
+
+        try:
+            conn = socks.create_connection(
+                (self.host, self.port),
+                proxy_type=self._socks_options['socks_version'],
+                proxy_addr=self._socks_options['proxy_host'],
+                proxy_port=self._socks_options['proxy_port'],
+                proxy_username=self._socks_options['username'],
+                proxy_password=self._socks_options['password'],
+                proxy_rdns=self._socks_options['rdns'],
+                timeout=self.timeout,
+                **extra_kw
+            )
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self, "Connection to %s timed out. (connect timeout=%s)" %
+                (self.host, self.timeout))
+
+        except socks.ProxyError as e:
+            # This is fragile as hell, but it seems to be the only way to raise
+            # useful errors here.
+            if e.socket_err:
+                error = e.socket_err
+                if isinstance(error, SocketTimeout):
+                    raise ConnectTimeoutError(
+                        self,
+                        "Connection to %s timed out. (connect timeout=%s)" %
+                        (self.host, self.timeout)
+                    )
+                else:
+                    raise NewConnectionError(
+                        self,
+                        "Failed to establish a new connection: %s" % error
+                    )
+            else:
+                raise NewConnectionError(
+                    self,
+                    "Failed to establish a new connection: %s" % e
+                )
+
+        except SocketError as e:  # Defensive: PySocks should catch all these.
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e)
+
+        return conn
+
+
+# We don't need to duplicate the Verified/Unverified distinction from
+# urllib3/connection.py here because the HTTPSConnection will already have been
+# correctly set to either the Verified or Unverified form by that module. This
+# means the SOCKSHTTPSConnection will automatically be the correct type.
+class SOCKSHTTPSConnection(SOCKSConnection, HTTPSConnection):
+    pass
+
+
+class SOCKSHTTPConnectionPool(HTTPConnectionPool):
+    ConnectionCls = SOCKSConnection
+
+
+class SOCKSHTTPSConnectionPool(HTTPSConnectionPool):
+    ConnectionCls = SOCKSHTTPSConnection
+
+
+class SOCKSProxyManager(PoolManager):
+    """
+    A version of the urllib3 ProxyManager that routes connections via the
+    defined SOCKS proxy.
+    """
+    pool_classes_by_scheme = {
+        'http': SOCKSHTTPConnectionPool,
+        'https': SOCKSHTTPSConnectionPool,
+    }
+
+    def __init__(self, proxy_url, username=None, password=None,
+                 num_pools=10, headers=None, **connection_pool_kw):
+        parsed = parse_url(proxy_url)
+
+        if username is None and password is None and parsed.auth is not None:
+            split = parsed.auth.split(':')
+            if len(split) == 2:
+                username, password = split
+        if parsed.scheme == 'socks5':
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = False
+        elif parsed.scheme == 'socks5h':
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = True
+        elif parsed.scheme == 'socks4':
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = False
+        elif parsed.scheme == 'socks4a':
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = True
+        else:
+            raise ValueError(
+                "Unable to determine SOCKS version from %s" % proxy_url
+            )
+
+        self.proxy_url = proxy_url
+
+        socks_options = {
+            'socks_version': socks_version,
+            'proxy_host': parsed.host,
+            'proxy_port': parsed.port,
+            'username': username,
+            'password': password,
+            'rdns': rdns
+        }
+        connection_pool_kw['_socks_options'] = socks_options
+
+        super(SOCKSProxyManager, self).__init__(
+            num_pools, headers, **connection_pool_kw
+        )
+
+        self.pool_classes_by_scheme = SOCKSProxyManager.pool_classes_by_scheme
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/exceptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/exceptions.py
new file mode 100644
index 00000000..7bbaa987
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/exceptions.py
@@ -0,0 +1,246 @@
+from __future__ import absolute_import
+from .packages.six.moves.http_client import (
+    IncompleteRead as httplib_IncompleteRead
+)
+# Base Exceptions
+
+
+class HTTPError(Exception):
+    "Base exception used by this module."
+    pass
+
+
+class HTTPWarning(Warning):
+    "Base warning used by this module."
+    pass
+
+
+class PoolError(HTTPError):
+    "Base exception for errors caused within a pool."
+    def __init__(self, pool, message):
+        self.pool = pool
+        HTTPError.__init__(self, "%s: %s" % (pool, message))
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, None)
+
+
+class RequestError(PoolError):
+    "Base exception for PoolErrors that have associated URLs."
+    def __init__(self, pool, url, message):
+        self.url = url
+        PoolError.__init__(self, pool, message)
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, self.url, None)
+
+
+class SSLError(HTTPError):
+    "Raised when SSL certificate fails in an HTTPS connection."
+    pass
+
+
+class ProxyError(HTTPError):
+    "Raised when the connection to a proxy fails."
+    pass
+
+
+class DecodeError(HTTPError):
+    "Raised when automatic decoding based on Content-Type fails."
+    pass
+
+
+class ProtocolError(HTTPError):
+    "Raised when something unexpected happens mid-request/response."
+    pass
+
+
+#: Renamed to ProtocolError but aliased for backwards compatibility.
+ConnectionError = ProtocolError
+
+
+# Leaf Exceptions
+
+class MaxRetryError(RequestError):
+    """Raised when the maximum number of retries is exceeded.
+
+    :param pool: The connection pool
+    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
+    :param string url: The requested Url
+    :param exceptions.Exception reason: The underlying error
+
+    """
+
+    def __init__(self, pool, url, reason=None):
+        self.reason = reason
+
+        message = "Max retries exceeded with url: %s (Caused by %r)" % (
+            url, reason)
+
+        RequestError.__init__(self, pool, url, message)
+
+
+class HostChangedError(RequestError):
+    "Raised when an existing pool gets a request for a foreign host."
+
+    def __init__(self, pool, url, retries=3):
+        message = "Tried to open a foreign host with url: %s" % url
+        RequestError.__init__(self, pool, url, message)
+        self.retries = retries
+
+
+class TimeoutStateError(HTTPError):
+    """ Raised when passing an invalid state to a timeout """
+    pass
+
+
+class TimeoutError(HTTPError):
+    """ Raised when a socket timeout error occurs.
+
+    Catching this error will catch both :exc:`ReadTimeoutErrors
+    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
+    """
+    pass
+
+
+class ReadTimeoutError(TimeoutError, RequestError):
+    "Raised when a socket timeout occurs while receiving data from a server"
+    pass
+
+
+# This timeout error does not have a URL attached and needs to inherit from the
+# base HTTPError
+class ConnectTimeoutError(TimeoutError):
+    "Raised when a socket timeout occurs while connecting to a server"
+    pass
+
+
+class NewConnectionError(ConnectTimeoutError, PoolError):
+    "Raised when we fail to establish a new connection. Usually ECONNREFUSED."
+    pass
+
+
+class EmptyPoolError(PoolError):
+    "Raised when a pool runs out of connections and no more are allowed."
+    pass
+
+
+class ClosedPoolError(PoolError):
+    "Raised when a request enters a pool after the pool has been closed."
+    pass
+
+
+class LocationValueError(ValueError, HTTPError):
+    "Raised when there is something wrong with a given URL input."
+    pass
+
+
+class LocationParseError(LocationValueError):
+    "Raised when get_host or similar fails to parse the URL input."
+
+    def __init__(self, location):
+        message = "Failed to parse: %s" % location
+        HTTPError.__init__(self, message)
+
+        self.location = location
+
+
+class ResponseError(HTTPError):
+    "Used as a container for an error reason supplied in a MaxRetryError."
+    GENERIC_ERROR = 'too many error responses'
+    SPECIFIC_ERROR = 'too many {status_code} error responses'
+
+
+class SecurityWarning(HTTPWarning):
+    "Warned when performing security reducing actions"
+    pass
+
+
+class SubjectAltNameWarning(SecurityWarning):
+    "Warned when connecting to a host with a certificate missing a SAN."
+    pass
+
+
+class InsecureRequestWarning(SecurityWarning):
+    "Warned when making an unverified HTTPS request."
+    pass
+
+
+class SystemTimeWarning(SecurityWarning):
+    "Warned when system time is suspected to be wrong"
+    pass
+
+
+class InsecurePlatformWarning(SecurityWarning):
+    "Warned when certain SSL configuration is not available on a platform."
+    pass
+
+
+class SNIMissingWarning(HTTPWarning):
+    "Warned when making a HTTPS request without SNI available."
+    pass
+
+
+class DependencyWarning(HTTPWarning):
+    """
+    Warned when an attempt is made to import a module with missing optional
+    dependencies.
+    """
+    pass
+
+
+class ResponseNotChunked(ProtocolError, ValueError):
+    "Response needs to be chunked in order to read it as chunks."
+    pass
+
+
+class BodyNotHttplibCompatible(HTTPError):
+    """
+    Body should be httplib.HTTPResponse like (have an fp attribute which
+    returns raw chunks) for read_chunked().
+    """
+    pass
+
+
+class IncompleteRead(HTTPError, httplib_IncompleteRead):
+    """
+    Response length doesn't match expected Content-Length
+
+    Subclass of http_client.IncompleteRead to allow int value
+    for `partial` to avoid creating large objects on streamed
+    reads.
+    """
+    def __init__(self, partial, expected):
+        super(IncompleteRead, self).__init__(partial, expected)
+
+    def __repr__(self):
+        return ('IncompleteRead(%i bytes read, '
+                '%i more expected)' % (self.partial, self.expected))
+
+
+class InvalidHeader(HTTPError):
+    "The header provided was somehow invalid."
+    pass
+
+
+class ProxySchemeUnknown(AssertionError, ValueError):
+    "ProxyManager does not support the supplied scheme"
+    # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
+
+    def __init__(self, scheme):
+        message = "Not supported proxy scheme %s" % scheme
+        super(ProxySchemeUnknown, self).__init__(message)
+
+
+class HeaderParsingError(HTTPError):
+    "Raised by assert_header_parsing, but we convert it to a log.warning statement."
+    def __init__(self, defects, unparsed_data):
+        message = '%s, unparsed data: %r' % (defects or 'Unknown', unparsed_data)
+        super(HeaderParsingError, self).__init__(message)
+
+
+class UnrewindableBodyError(HTTPError):
+    "urllib3 encountered an error when trying to rewind a body"
+    pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/fields.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/fields.py
new file mode 100644
index 00000000..6a9a5a7f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/fields.py
@@ -0,0 +1,272 @@
+from __future__ import absolute_import
+import email.utils
+import mimetypes
+import re
+
+from .packages import six
+
+
+def guess_content_type(filename, default='application/octet-stream'):
+    """
+    Guess the "Content-Type" of a file.
+
+    :param filename:
+        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
+    :param default:
+        If no "Content-Type" can be guessed, default to `default`.
+    """
+    if filename:
+        return mimetypes.guess_type(filename)[0] or default
+    return default
+
+
+def format_header_param_rfc2231(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    strategy defined in RFC 2231.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows RFC 2388 Section 4.4.
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        An RFC-2231-formatted unicode string.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    if not any(ch in value for ch in '"\\\r\n'):
+        result = u'%s="%s"' % (name, value)
+        try:
+            result.encode('ascii')
+        except (UnicodeEncodeError, UnicodeDecodeError):
+            pass
+        else:
+            return result
+
+    if not six.PY3:  # Python 2:
+        value = value.encode('utf-8')
+
+    # encode_rfc2231 accepts an encoded string and returns an ascii-encoded
+    # string in Python 2 but accepts and returns unicode strings in Python 3
+    value = email.utils.encode_rfc2231(value, 'utf-8')
+    value = '%s*=%s' % (name, value)
+
+    if not six.PY3:  # Python 2:
+        value = value.decode('utf-8')
+
+    return value
+
+
+_HTML5_REPLACEMENTS = {
+    u"\u0022": u"%22",
+    # Replace "\" with "\\".
+    u"\u005C": u"\u005C\u005C",
+    u"\u005C": u"\u005C\u005C",
+}
+
+# All control characters from 0x00 to 0x1F *except* 0x1B.
+_HTML5_REPLACEMENTS.update({
+    six.unichr(cc): u"%{:02X}".format(cc)
+    for cc
+    in range(0x00, 0x1F+1)
+    if cc not in (0x1B,)
+})
+
+
+def _replace_multiple(value, needles_and_replacements):
+
+    def replacer(match):
+        return needles_and_replacements[match.group(0)]
+
+    pattern = re.compile(
+        r"|".join([
+            re.escape(needle) for needle in needles_and_replacements.keys()
+        ])
+    )
+
+    result = pattern.sub(replacer, value)
+
+    return result
+
+
+def format_header_param_html5(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    HTML5 strategy.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows the `HTML5 Working Draft
+    Section 4.10.22.7`_ and matches the behavior of curl and modern browsers.
+
+    .. _HTML5 Working Draft Section 4.10.22.7:
+        https://w3c.github.io/html/sec-forms.html#multipart-form-data
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        A unicode string, stripped of troublesome characters.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    value = _replace_multiple(value, _HTML5_REPLACEMENTS)
+
+    return u'%s="%s"' % (name, value)
+
+
+# For backwards-compatibility.
+format_header_param = format_header_param_html5
+
+
+class RequestField(object):
+    """
+    A data container for request body parameters.
+
+    :param name:
+        The name of this request field. Must be unicode.
+    :param data:
+        The data/value body.
+    :param filename:
+        An optional filename of the request field. Must be unicode.
+    :param headers:
+        An optional dict-like object of headers to initially use for the field.
+    :param header_formatter:
+        An optional callable that is used to encode and format the headers. By
+        default, this is :func:`format_header_param_html5`.
+    """
+    def __init__(
+            self,
+            name,
+            data,
+            filename=None,
+            headers=None,
+            header_formatter=format_header_param_html5):
+        self._name = name
+        self._filename = filename
+        self.data = data
+        self.headers = {}
+        if headers:
+            self.headers = dict(headers)
+        self.header_formatter = header_formatter
+
+    @classmethod
+    def from_tuples(
+            cls,
+            fieldname,
+            value,
+            header_formatter=format_header_param_html5):
+        """
+        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
+
+        Supports constructing :class:`~urllib3.fields.RequestField` from
+        parameter of key/value strings AND key/filetuple. A filetuple is a
+        (filename, data, MIME type) tuple where the MIME type is optional.
+        For example::
+
+            'foo': 'bar',
+            'fakefile': ('foofile.txt', 'contents of foofile'),
+            'realfile': ('barfile.txt', open('realfile').read()),
+            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
+            'nonamefile': 'contents of nonamefile field',
+
+        Field names and filenames must be unicode.
+        """
+        if isinstance(value, tuple):
+            if len(value) == 3:
+                filename, data, content_type = value
+            else:
+                filename, data = value
+                content_type = guess_content_type(filename)
+        else:
+            filename = None
+            content_type = None
+            data = value
+
+        request_param = cls(
+            fieldname, data, filename=filename, header_formatter=header_formatter)
+        request_param.make_multipart(content_type=content_type)
+
+        return request_param
+
+    def _render_part(self, name, value):
+        """
+        Overridable helper function to format a single header parameter. By
+        default, this calls ``self.header_formatter``.
+
+        :param name:
+            The name of the parameter, a string expected to be ASCII only.
+        :param value:
+            The value of the parameter, provided as a unicode string.
+        """
+
+        return self.header_formatter(name, value)
+
+    def _render_parts(self, header_parts):
+        """
+        Helper function to format and quote a single header.
+
+        Useful for single headers that are composed of multiple items. E.g.,
+        'Content-Disposition' fields.
+
+        :param header_parts:
+            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
+            as `k1="v1"; k2="v2"; ...`.
+        """
+        parts = []
+        iterable = header_parts
+        if isinstance(header_parts, dict):
+            iterable = header_parts.items()
+
+        for name, value in iterable:
+            if value is not None:
+                parts.append(self._render_part(name, value))
+
+        return u'; '.join(parts)
+
+    def render_headers(self):
+        """
+        Renders the headers for this request field.
+        """
+        lines = []
+
+        sort_keys = ['Content-Disposition', 'Content-Type', 'Content-Location']
+        for sort_key in sort_keys:
+            if self.headers.get(sort_key, False):
+                lines.append(u'%s: %s' % (sort_key, self.headers[sort_key]))
+
+        for header_name, header_value in self.headers.items():
+            if header_name not in sort_keys:
+                if header_value:
+                    lines.append(u'%s: %s' % (header_name, header_value))
+
+        lines.append(u'\r\n')
+        return u'\r\n'.join(lines)
+
+    def make_multipart(self, content_disposition=None, content_type=None,
+                       content_location=None):
+        """
+        Makes this request field into a multipart request field.
+
+        This method overrides "Content-Disposition", "Content-Type" and
+        "Content-Location" headers to the request parameter.
+
+        :param content_type:
+            The 'Content-Type' of the request body.
+        :param content_location:
+            The 'Content-Location' of the request body.
+
+        """
+        self.headers['Content-Disposition'] = content_disposition or u'form-data'
+        self.headers['Content-Disposition'] += u'; '.join([
+            u'', self._render_parts(
+                ((u'name', self._name), (u'filename', self._filename))
+            )
+        ])
+        self.headers['Content-Type'] = content_type
+        self.headers['Content-Location'] = content_location
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/filepost.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/filepost.py
new file mode 100644
index 00000000..78f1e19b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/filepost.py
@@ -0,0 +1,98 @@
+from __future__ import absolute_import
+import binascii
+import codecs
+import os
+
+from io import BytesIO
+
+from .packages import six
+from .packages.six import b
+from .fields import RequestField
+
+writer = codecs.lookup('utf-8')[3]
+
+
+def choose_boundary():
+    """
+    Our embarrassingly-simple replacement for mimetools.choose_boundary.
+    """
+    boundary = binascii.hexlify(os.urandom(16))
+    if six.PY3:
+        boundary = boundary.decode('ascii')
+    return boundary
+
+
+def iter_field_objects(fields):
+    """
+    Iterate over fields.
+
+    Supports list of (k, v) tuples and dicts, and lists of
+    :class:`~urllib3.fields.RequestField`.
+
+    """
+    if isinstance(fields, dict):
+        i = six.iteritems(fields)
+    else:
+        i = iter(fields)
+
+    for field in i:
+        if isinstance(field, RequestField):
+            yield field
+        else:
+            yield RequestField.from_tuples(*field)
+
+
+def iter_fields(fields):
+    """
+    .. deprecated:: 1.6
+
+    Iterate over fields.
+
+    The addition of :class:`~urllib3.fields.RequestField` makes this function
+    obsolete. Instead, use :func:`iter_field_objects`, which returns
+    :class:`~urllib3.fields.RequestField` objects.
+
+    Supports list of (k, v) tuples and dicts.
+    """
+    if isinstance(fields, dict):
+        return ((k, v) for k, v in six.iteritems(fields))
+
+    return ((k, v) for k, v in fields)
+
+
+def encode_multipart_formdata(fields, boundary=None):
+    """
+    Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
+
+    :param fields:
+        Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
+
+    :param boundary:
+        If not specified, then a random boundary will be generated using
+        :func:`urllib3.filepost.choose_boundary`.
+    """
+    body = BytesIO()
+    if boundary is None:
+        boundary = choose_boundary()
+
+    for field in iter_field_objects(fields):
+        body.write(b('--%s\r\n' % (boundary)))
+
+        writer(body).write(field.render_headers())
+        data = field.data
+
+        if isinstance(data, int):
+            data = str(data)  # Backwards compatibility
+
+        if isinstance(data, six.text_type):
+            writer(body).write(data)
+        else:
+            body.write(data)
+
+        body.write(b'\r\n')
+
+    body.write(b('--%s--\r\n' % (boundary)))
+
+    content_type = str('multipart/form-data; boundary=%s' % boundary)
+
+    return body.getvalue(), content_type
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__init__.py
new file mode 100644
index 00000000..170e974c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__init__.py
@@ -0,0 +1,5 @@
+from __future__ import absolute_import
+
+from . import ssl_match_hostname
+
+__all__ = ('ssl_match_hostname', )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..cc9ded82
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/six.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/six.cpython-37.pyc
new file mode 100644
index 00000000..a549e6df
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/__pycache__/six.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..50ab4d17
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-37.pyc
new file mode 100644
index 00000000..053988eb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
new file mode 100644
index 00000000..740db377
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+"""
+backports.makefile
+~~~~~~~~~~~~~~~~~~
+
+Backports the Python 3 ``socket.makefile`` method for use with anything that
+wants to create a "fake" socket object.
+"""
+import io
+
+from socket import SocketIO
+
+
+def backport_makefile(self, mode="r", buffering=None, encoding=None,
+                      errors=None, newline=None):
+    """
+    Backport of ``socket.makefile`` from Python 3.5.
+    """
+    if not set(mode) <= {"r", "w", "b"}:
+        raise ValueError(
+            "invalid mode %r (only r, w, b allowed)" % (mode,)
+        )
+    writing = "w" in mode
+    reading = "r" in mode or not writing
+    assert reading or writing
+    binary = "b" in mode
+    rawmode = ""
+    if reading:
+        rawmode += "r"
+    if writing:
+        rawmode += "w"
+    raw = SocketIO(self, rawmode)
+    self._makefile_refs += 1
+    if buffering is None:
+        buffering = -1
+    if buffering < 0:
+        buffering = io.DEFAULT_BUFFER_SIZE
+    if buffering == 0:
+        if not binary:
+            raise ValueError("unbuffered streams must be binary")
+        return raw
+    if reading and writing:
+        buffer = io.BufferedRWPair(raw, raw, buffering)
+    elif reading:
+        buffer = io.BufferedReader(raw, buffering)
+    else:
+        assert writing
+        buffer = io.BufferedWriter(raw, buffering)
+    if binary:
+        return buffer
+    text = io.TextIOWrapper(buffer, encoding, errors, newline)
+    text.mode = mode
+    return text
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__init__.py
new file mode 100644
index 00000000..371c6dd5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__init__.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+An implementation of semantics and validations described in RFC 3986.
+
+See http://rfc3986.readthedocs.io/ for detailed documentation.
+
+:copyright: (c) 2014 Rackspace
+:license: Apache v2.0, see LICENSE for details
+"""
+
+from .api import iri_reference
+from .api import IRIReference
+from .api import is_valid_uri
+from .api import normalize_uri
+from .api import uri_reference
+from .api import URIReference
+from .api import urlparse
+from .parseresult import ParseResult
+
+__title__ = 'rfc3986'
+__author__ = 'Ian Stapleton Cordasco'
+__author_email__ = 'graffatcolmingov@gmail.com'
+__license__ = 'Apache v2.0'
+__copyright__ = 'Copyright 2014 Rackspace'
+__version__ = '1.3.2'
+
+__all__ = (
+    'ParseResult',
+    'URIReference',
+    'IRIReference',
+    'is_valid_uri',
+    'normalize_uri',
+    'uri_reference',
+    'iri_reference',
+    'urlparse',
+    '__title__',
+    '__author__',
+    '__author_email__',
+    '__license__',
+    '__copyright__',
+    '__version__',
+)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/__init__.cpython-37.pyc
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--- /dev/null
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/_mixin.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/_mixin.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/abnf_regexp.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/abnf_regexp.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/api.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/api.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/builder.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/builder.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/compat.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/exceptions.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/exceptions.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/iri.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/iri.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/misc.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/misc.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/normalizers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/normalizers.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/parseresult.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/parseresult.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/uri.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/uri.cpython-37.pyc
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+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/uri.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/validators.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/__pycache__/validators.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/_mixin.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/_mixin.py
new file mode 100644
index 00000000..543925cd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/_mixin.py
@@ -0,0 +1,353 @@
+"""Module containing the implementation of the URIMixin class."""
+import warnings
+
+from . import exceptions as exc
+from . import misc
+from . import normalizers
+from . import validators
+
+
+class URIMixin(object):
+    """Mixin with all shared methods for URIs and IRIs."""
+
+    __hash__ = tuple.__hash__
+
+    def authority_info(self):
+        """Return a dictionary with the ``userinfo``, ``host``, and ``port``.
+
+        If the authority is not valid, it will raise a
+        :class:`~rfc3986.exceptions.InvalidAuthority` Exception.
+
+        :returns:
+            ``{'userinfo': 'username:password', 'host': 'www.example.com',
+            'port': '80'}``
+        :rtype: dict
+        :raises rfc3986.exceptions.InvalidAuthority:
+            If the authority is not ``None`` and can not be parsed.
+        """
+        if not self.authority:
+            return {'userinfo': None, 'host': None, 'port': None}
+
+        match = self._match_subauthority()
+
+        if match is None:
+            # In this case, we have an authority that was parsed from the URI
+            # Reference, but it cannot be further parsed by our
+            # misc.SUBAUTHORITY_MATCHER. In this case it must not be a valid
+            # authority.
+            raise exc.InvalidAuthority(self.authority.encode(self.encoding))
+
+        # We had a match, now let's ensure that it is actually a valid host
+        # address if it is IPv4
+        matches = match.groupdict()
+        host = matches.get('host')
+
+        if (host and misc.IPv4_MATCHER.match(host) and not
+                validators.valid_ipv4_host_address(host)):
+            # If we have a host, it appears to be IPv4 and it does not have
+            # valid bytes, it is an InvalidAuthority.
+            raise exc.InvalidAuthority(self.authority.encode(self.encoding))
+
+        return matches
+
+    def _match_subauthority(self):
+        return misc.SUBAUTHORITY_MATCHER.match(self.authority)
+
+    @property
+    def host(self):
+        """If present, a string representing the host."""
+        try:
+            authority = self.authority_info()
+        except exc.InvalidAuthority:
+            return None
+        return authority['host']
+
+    @property
+    def port(self):
+        """If present, the port extracted from the authority."""
+        try:
+            authority = self.authority_info()
+        except exc.InvalidAuthority:
+            return None
+        return authority['port']
+
+    @property
+    def userinfo(self):
+        """If present, the userinfo extracted from the authority."""
+        try:
+            authority = self.authority_info()
+        except exc.InvalidAuthority:
+            return None
+        return authority['userinfo']
+
+    def is_absolute(self):
+        """Determine if this URI Reference is an absolute URI.
+
+        See http://tools.ietf.org/html/rfc3986#section-4.3 for explanation.
+
+        :returns: ``True`` if it is an absolute URI, ``False`` otherwise.
+        :rtype: bool
+        """
+        return bool(misc.ABSOLUTE_URI_MATCHER.match(self.unsplit()))
+
+    def is_valid(self, **kwargs):
+        """Determine if the URI is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the :class:`~rfc3986.validators.Validator` object instead.
+
+        :param bool require_scheme: Set to ``True`` if you wish to require the
+            presence of the scheme component.
+        :param bool require_authority: Set to ``True`` if you wish to require
+            the presence of the authority component.
+        :param bool require_path: Set to ``True`` if you wish to require the
+            presence of the path component.
+        :param bool require_query: Set to ``True`` if you wish to require the
+            presence of the query component.
+        :param bool require_fragment: Set to ``True`` if you wish to require
+            the presence of the fragment component.
+        :returns: ``True`` if the URI is valid. ``False`` otherwise.
+        :rtype: bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        validators = [
+            (self.scheme_is_valid, kwargs.get('require_scheme', False)),
+            (self.authority_is_valid, kwargs.get('require_authority', False)),
+            (self.path_is_valid, kwargs.get('require_path', False)),
+            (self.query_is_valid, kwargs.get('require_query', False)),
+            (self.fragment_is_valid, kwargs.get('require_fragment', False)),
+            ]
+        return all(v(r) for v, r in validators)
+
+    def authority_is_valid(self, require=False):
+        """Determine if the authority component is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the :class:`~rfc3986.validators.Validator` object instead.
+
+        :param bool require:
+            Set to ``True`` to require the presence of this component.
+        :returns:
+            ``True`` if the authority is valid. ``False`` otherwise.
+        :rtype:
+            bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        try:
+            self.authority_info()
+        except exc.InvalidAuthority:
+            return False
+
+        return validators.authority_is_valid(
+            self.authority,
+            host=self.host,
+            require=require,
+        )
+
+    def scheme_is_valid(self, require=False):
+        """Determine if the scheme component is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the :class:`~rfc3986.validators.Validator` object instead.
+
+        :param str require: Set to ``True`` to require the presence of this
+            component.
+        :returns: ``True`` if the scheme is valid. ``False`` otherwise.
+        :rtype: bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        return validators.scheme_is_valid(self.scheme, require)
+
+    def path_is_valid(self, require=False):
+        """Determine if the path component is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the :class:`~rfc3986.validators.Validator` object instead.
+
+        :param str require: Set to ``True`` to require the presence of this
+            component.
+        :returns: ``True`` if the path is valid. ``False`` otherwise.
+        :rtype: bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        return validators.path_is_valid(self.path, require)
+
+    def query_is_valid(self, require=False):
+        """Determine if the query component is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the :class:`~rfc3986.validators.Validator` object instead.
+
+        :param str require: Set to ``True`` to require the presence of this
+            component.
+        :returns: ``True`` if the query is valid. ``False`` otherwise.
+        :rtype: bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        return validators.query_is_valid(self.query, require)
+
+    def fragment_is_valid(self, require=False):
+        """Determine if the fragment component is valid.
+
+        .. deprecated:: 1.1.0
+
+            Use the Validator object instead.
+
+        :param str require: Set to ``True`` to require the presence of this
+            component.
+        :returns: ``True`` if the fragment is valid. ``False`` otherwise.
+        :rtype: bool
+        """
+        warnings.warn("Please use rfc3986.validators.Validator instead. "
+                      "This method will be eventually removed.",
+                      DeprecationWarning)
+        return validators.fragment_is_valid(self.fragment, require)
+
+    def normalized_equality(self, other_ref):
+        """Compare this URIReference to another URIReference.
+
+        :param URIReference other_ref: (required), The reference with which
+            we're comparing.
+        :returns: ``True`` if the references are equal, ``False`` otherwise.
+        :rtype: bool
+        """
+        return tuple(self.normalize()) == tuple(other_ref.normalize())
+
+    def resolve_with(self, base_uri, strict=False):
+        """Use an absolute URI Reference to resolve this relative reference.
+
+        Assuming this is a relative reference that you would like to resolve,
+        use the provided base URI to resolve it.
+
+        See http://tools.ietf.org/html/rfc3986#section-5 for more information.
+
+        :param base_uri: Either a string or URIReference. It must be an
+            absolute URI or it will raise an exception.
+        :returns: A new URIReference which is the result of resolving this
+            reference using ``base_uri``.
+        :rtype: :class:`URIReference`
+        :raises rfc3986.exceptions.ResolutionError:
+            If the ``base_uri`` is not an absolute URI.
+        """
+        if not isinstance(base_uri, URIMixin):
+            base_uri = type(self).from_string(base_uri)
+
+        if not base_uri.is_absolute():
+            raise exc.ResolutionError(base_uri)
+
+        # This is optional per
+        # http://tools.ietf.org/html/rfc3986#section-5.2.1
+        base_uri = base_uri.normalize()
+
+        # The reference we're resolving
+        resolving = self
+
+        if not strict and resolving.scheme == base_uri.scheme:
+            resolving = resolving.copy_with(scheme=None)
+
+        # http://tools.ietf.org/html/rfc3986#page-32
+        if resolving.scheme is not None:
+            target = resolving.copy_with(
+                path=normalizers.normalize_path(resolving.path)
+            )
+        else:
+            if resolving.authority is not None:
+                target = resolving.copy_with(
+                    scheme=base_uri.scheme,
+                    path=normalizers.normalize_path(resolving.path)
+                )
+            else:
+                if resolving.path is None:
+                    if resolving.query is not None:
+                        query = resolving.query
+                    else:
+                        query = base_uri.query
+                    target = resolving.copy_with(
+                        scheme=base_uri.scheme,
+                        authority=base_uri.authority,
+                        path=base_uri.path,
+                        query=query
+                    )
+                else:
+                    if resolving.path.startswith('/'):
+                        path = normalizers.normalize_path(resolving.path)
+                    else:
+                        path = normalizers.normalize_path(
+                            misc.merge_paths(base_uri, resolving.path)
+                        )
+                    target = resolving.copy_with(
+                        scheme=base_uri.scheme,
+                        authority=base_uri.authority,
+                        path=path,
+                        query=resolving.query
+                    )
+        return target
+
+    def unsplit(self):
+        """Create a URI string from the components.
+
+        :returns: The URI Reference reconstituted as a string.
+        :rtype: str
+        """
+        # See http://tools.ietf.org/html/rfc3986#section-5.3
+        result_list = []
+        if self.scheme:
+            result_list.extend([self.scheme, ':'])
+        if self.authority:
+            result_list.extend(['//', self.authority])
+        if self.path:
+            result_list.append(self.path)
+        if self.query is not None:
+            result_list.extend(['?', self.query])
+        if self.fragment is not None:
+            result_list.extend(['#', self.fragment])
+        return ''.join(result_list)
+
+    def copy_with(self, scheme=misc.UseExisting, authority=misc.UseExisting,
+                  path=misc.UseExisting, query=misc.UseExisting,
+                  fragment=misc.UseExisting):
+        """Create a copy of this reference with the new components.
+
+        :param str scheme:
+            (optional) The scheme to use for the new reference.
+        :param str authority:
+            (optional) The authority to use for the new reference.
+        :param str path:
+            (optional) The path to use for the new reference.
+        :param str query:
+            (optional) The query to use for the new reference.
+        :param str fragment:
+            (optional) The fragment to use for the new reference.
+        :returns:
+            New URIReference with provided components.
+        :rtype:
+            URIReference
+        """
+        attributes = {
+            'scheme': scheme,
+            'authority': authority,
+            'path': path,
+            'query': query,
+            'fragment': fragment,
+        }
+        for key, value in list(attributes.items()):
+            if value is misc.UseExisting:
+                del attributes[key]
+        uri = self._replace(**attributes)
+        uri.encoding = self.encoding
+        return uri
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/abnf_regexp.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/abnf_regexp.py
new file mode 100644
index 00000000..24c9c3d0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/abnf_regexp.py
@@ -0,0 +1,267 @@
+# -*- coding: utf-8 -*-
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module for the regular expressions crafted from ABNF."""
+
+import sys
+
+# https://tools.ietf.org/html/rfc3986#page-13
+GEN_DELIMS = GENERIC_DELIMITERS = ":/?#[]@"
+GENERIC_DELIMITERS_SET = set(GENERIC_DELIMITERS)
+# https://tools.ietf.org/html/rfc3986#page-13
+SUB_DELIMS = SUB_DELIMITERS = "!$&'()*+,;="
+SUB_DELIMITERS_SET = set(SUB_DELIMITERS)
+# Escape the '*' for use in regular expressions
+SUB_DELIMITERS_RE = r"!$&'()\*+,;="
+RESERVED_CHARS_SET = GENERIC_DELIMITERS_SET.union(SUB_DELIMITERS_SET)
+ALPHA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
+DIGIT = '0123456789'
+# https://tools.ietf.org/html/rfc3986#section-2.3
+UNRESERVED = UNRESERVED_CHARS = ALPHA + DIGIT + r'._!-'
+UNRESERVED_CHARS_SET = set(UNRESERVED_CHARS)
+NON_PCT_ENCODED_SET = RESERVED_CHARS_SET.union(UNRESERVED_CHARS_SET)
+# We need to escape the '-' in this case:
+UNRESERVED_RE = r'A-Za-z0-9._~\-'
+
+# Percent encoded character values
+PERCENT_ENCODED = PCT_ENCODED = '%[A-Fa-f0-9]{2}'
+PCHAR = '([' + UNRESERVED_RE + SUB_DELIMITERS_RE + ':@]|%s)' % PCT_ENCODED
+
+# NOTE(sigmavirus24): We're going to use more strict regular expressions
+# than appear in Appendix B for scheme. This will prevent over-eager
+# consuming of items that aren't schemes.
+SCHEME_RE = '[a-zA-Z][a-zA-Z0-9+.-]*'
+_AUTHORITY_RE = '[^/?#]*'
+_PATH_RE = '[^?#]*'
+_QUERY_RE = '[^#]*'
+_FRAGMENT_RE = '.*'
+
+# Extracted from http://tools.ietf.org/html/rfc3986#appendix-B
+COMPONENT_PATTERN_DICT = {
+    'scheme': SCHEME_RE,
+    'authority': _AUTHORITY_RE,
+    'path': _PATH_RE,
+    'query': _QUERY_RE,
+    'fragment': _FRAGMENT_RE,
+}
+
+# See http://tools.ietf.org/html/rfc3986#appendix-B
+# In this case, we name each of the important matches so we can use
+# SRE_Match#groupdict to parse the values out if we so choose. This is also
+# modified to ignore other matches that are not important to the parsing of
+# the reference so we can also simply use SRE_Match#groups.
+URL_PARSING_RE = (
+    r'(?:(?P<scheme>{scheme}):)?(?://(?P<authority>{authority}))?'
+    r'(?P<path>{path})(?:\?(?P<query>{query}))?'
+    r'(?:#(?P<fragment>{fragment}))?'
+).format(**COMPONENT_PATTERN_DICT)
+
+
+# #########################
+# Authority Matcher Section
+# #########################
+
+# Host patterns, see: http://tools.ietf.org/html/rfc3986#section-3.2.2
+# The pattern for a regular name, e.g.,  www.google.com, api.github.com
+REGULAR_NAME_RE = REG_NAME = '((?:{0}|[{1}])*)'.format(
+    '%[0-9A-Fa-f]{2}', SUB_DELIMITERS_RE + UNRESERVED_RE
+)
+# The pattern for an IPv4 address, e.g., 192.168.255.255, 127.0.0.1,
+IPv4_RE = r'([0-9]{1,3}\.){3}[0-9]{1,3}'
+# Hexadecimal characters used in each piece of an IPv6 address
+HEXDIG_RE = '[0-9A-Fa-f]{1,4}'
+# Least-significant 32 bits of an IPv6 address
+LS32_RE = '({hex}:{hex}|{ipv4})'.format(hex=HEXDIG_RE, ipv4=IPv4_RE)
+# Substitutions into the following patterns for IPv6 patterns defined
+# http://tools.ietf.org/html/rfc3986#page-20
+_subs = {'hex': HEXDIG_RE, 'ls32': LS32_RE}
+
+# Below: h16 = hexdig, see: https://tools.ietf.org/html/rfc5234 for details
+# about ABNF (Augmented Backus-Naur Form) use in the comments
+variations = [
+    #                            6( h16 ":" ) ls32
+    '(%(hex)s:){6}%(ls32)s' % _subs,
+    #                       "::" 5( h16 ":" ) ls32
+    '::(%(hex)s:){5}%(ls32)s' % _subs,
+    # [               h16 ] "::" 4( h16 ":" ) ls32
+    '(%(hex)s)?::(%(hex)s:){4}%(ls32)s' % _subs,
+    # [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
+    '((%(hex)s:)?%(hex)s)?::(%(hex)s:){3}%(ls32)s' % _subs,
+    # [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
+    '((%(hex)s:){0,2}%(hex)s)?::(%(hex)s:){2}%(ls32)s' % _subs,
+    # [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
+    '((%(hex)s:){0,3}%(hex)s)?::%(hex)s:%(ls32)s' % _subs,
+    # [ *4( h16 ":" ) h16 ] "::"              ls32
+    '((%(hex)s:){0,4}%(hex)s)?::%(ls32)s' % _subs,
+    # [ *5( h16 ":" ) h16 ] "::"              h16
+    '((%(hex)s:){0,5}%(hex)s)?::%(hex)s' % _subs,
+    # [ *6( h16 ":" ) h16 ] "::"
+    '((%(hex)s:){0,6}%(hex)s)?::' % _subs,
+]
+
+IPv6_RE = '(({0})|({1})|({2})|({3})|({4})|({5})|({6})|({7})|({8}))'.format(
+    *variations
+)
+
+IPv_FUTURE_RE = r'v[0-9A-Fa-f]+\.[%s]+' % (
+    UNRESERVED_RE + SUB_DELIMITERS_RE + ':'
+)
+
+# RFC 6874 Zone ID ABNF
+ZONE_ID = '(?:[' + UNRESERVED_RE + ']|' + PCT_ENCODED + ')+'
+
+IPv6_ADDRZ_RFC4007_RE = IPv6_RE + '(?:(?:%25|%)' + ZONE_ID + ')?'
+IPv6_ADDRZ_RE = IPv6_RE + '(?:%25' + ZONE_ID + ')?'
+
+IP_LITERAL_RE = r'\[({0}|{1})\]'.format(
+    IPv6_ADDRZ_RFC4007_RE,
+    IPv_FUTURE_RE,
+)
+
+# Pattern for matching the host piece of the authority
+HOST_RE = HOST_PATTERN = '({0}|{1}|{2})'.format(
+    REG_NAME,
+    IPv4_RE,
+    IP_LITERAL_RE,
+)
+USERINFO_RE = '^([' + UNRESERVED_RE + SUB_DELIMITERS_RE + ':]|%s)+' % (
+    PCT_ENCODED
+)
+PORT_RE = '[0-9]{1,5}'
+
+# ####################
+# Path Matcher Section
+# ####################
+
+# See http://tools.ietf.org/html/rfc3986#section-3.3 for more information
+# about the path patterns defined below.
+segments = {
+    'segment': PCHAR + '*',
+    # Non-zero length segment
+    'segment-nz': PCHAR + '+',
+    # Non-zero length segment without ":"
+    'segment-nz-nc': PCHAR.replace(':', '') + '+'
+}
+
+# Path types taken from Section 3.3 (linked above)
+PATH_EMPTY = '^$'
+PATH_ROOTLESS = '%(segment-nz)s(/%(segment)s)*' % segments
+PATH_NOSCHEME = '%(segment-nz-nc)s(/%(segment)s)*' % segments
+PATH_ABSOLUTE = '/(%s)?' % PATH_ROOTLESS
+PATH_ABEMPTY = '(/%(segment)s)*' % segments
+PATH_RE = '^(%s|%s|%s|%s|%s)$' % (
+    PATH_ABEMPTY, PATH_ABSOLUTE, PATH_NOSCHEME, PATH_ROOTLESS, PATH_EMPTY
+)
+
+FRAGMENT_RE = QUERY_RE = (
+    '^([/?:@' + UNRESERVED_RE + SUB_DELIMITERS_RE + ']|%s)*$' % PCT_ENCODED
+)
+
+# ##########################
+# Relative reference matcher
+# ##########################
+
+# See http://tools.ietf.org/html/rfc3986#section-4.2 for details
+RELATIVE_PART_RE = '(//%s%s|%s|%s|%s)' % (
+    COMPONENT_PATTERN_DICT['authority'],
+    PATH_ABEMPTY,
+    PATH_ABSOLUTE,
+    PATH_NOSCHEME,
+    PATH_EMPTY,
+)
+
+# See http://tools.ietf.org/html/rfc3986#section-3 for definition
+HIER_PART_RE = '(//%s%s|%s|%s|%s)' % (
+    COMPONENT_PATTERN_DICT['authority'],
+    PATH_ABEMPTY,
+    PATH_ABSOLUTE,
+    PATH_ROOTLESS,
+    PATH_EMPTY,
+)
+
+# ###############
+# IRIs / RFC 3987
+# ###############
+
+# Only wide-unicode gets the high-ranges of UCSCHAR
+if sys.maxunicode > 0xFFFF:  # pragma: no cover
+    IPRIVATE = u'\uE000-\uF8FF\U000F0000-\U000FFFFD\U00100000-\U0010FFFD'
+    UCSCHAR_RE = (
+        u'\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF'
+        u'\U00010000-\U0001FFFD\U00020000-\U0002FFFD'
+        u'\U00030000-\U0003FFFD\U00040000-\U0004FFFD'
+        u'\U00050000-\U0005FFFD\U00060000-\U0006FFFD'
+        u'\U00070000-\U0007FFFD\U00080000-\U0008FFFD'
+        u'\U00090000-\U0009FFFD\U000A0000-\U000AFFFD'
+        u'\U000B0000-\U000BFFFD\U000C0000-\U000CFFFD'
+        u'\U000D0000-\U000DFFFD\U000E1000-\U000EFFFD'
+    )
+else:  # pragma: no cover
+    IPRIVATE = u'\uE000-\uF8FF'
+    UCSCHAR_RE = (
+        u'\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF'
+    )
+
+IUNRESERVED_RE = u'A-Za-z0-9\\._~\\-' + UCSCHAR_RE
+IPCHAR = u'([' + IUNRESERVED_RE + SUB_DELIMITERS_RE + u':@]|%s)' % PCT_ENCODED
+
+isegments = {
+    'isegment': IPCHAR + u'*',
+    # Non-zero length segment
+    'isegment-nz': IPCHAR + u'+',
+    # Non-zero length segment without ":"
+    'isegment-nz-nc': IPCHAR.replace(':', '') + u'+'
+}
+
+IPATH_ROOTLESS = u'%(isegment-nz)s(/%(isegment)s)*' % isegments
+IPATH_NOSCHEME = u'%(isegment-nz-nc)s(/%(isegment)s)*' % isegments
+IPATH_ABSOLUTE = u'/(?:%s)?' % IPATH_ROOTLESS
+IPATH_ABEMPTY = u'(?:/%(isegment)s)*' % isegments
+IPATH_RE = u'^(?:%s|%s|%s|%s|%s)$' % (
+    IPATH_ABEMPTY, IPATH_ABSOLUTE, IPATH_NOSCHEME, IPATH_ROOTLESS, PATH_EMPTY
+)
+
+IREGULAR_NAME_RE = IREG_NAME = u'(?:{0}|[{1}])*'.format(
+    u'%[0-9A-Fa-f]{2}', SUB_DELIMITERS_RE + IUNRESERVED_RE
+)
+
+IHOST_RE = IHOST_PATTERN = u'({0}|{1}|{2})'.format(
+    IREG_NAME,
+    IPv4_RE,
+    IP_LITERAL_RE,
+)
+
+IUSERINFO_RE = u'^(?:[' + IUNRESERVED_RE + SUB_DELIMITERS_RE + u':]|%s)+' % (
+    PCT_ENCODED
+)
+
+IFRAGMENT_RE = (u'^(?:[/?:@' + IUNRESERVED_RE + SUB_DELIMITERS_RE
+                + u']|%s)*$' % PCT_ENCODED)
+IQUERY_RE = (u'^(?:[/?:@' + IUNRESERVED_RE + SUB_DELIMITERS_RE
+             + IPRIVATE + u']|%s)*$' % PCT_ENCODED)
+
+IRELATIVE_PART_RE = u'(//%s%s|%s|%s|%s)' % (
+    COMPONENT_PATTERN_DICT['authority'],
+    IPATH_ABEMPTY,
+    IPATH_ABSOLUTE,
+    IPATH_NOSCHEME,
+    PATH_EMPTY,
+)
+
+IHIER_PART_RE = u'(//%s%s|%s|%s|%s)' % (
+    COMPONENT_PATTERN_DICT['authority'],
+    IPATH_ABEMPTY,
+    IPATH_ABSOLUTE,
+    IPATH_ROOTLESS,
+    PATH_EMPTY,
+)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/api.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/api.py
new file mode 100644
index 00000000..ddc4a1cd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/api.py
@@ -0,0 +1,106 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Module containing the simple and functional API for rfc3986.
+
+This module defines functions and provides access to the public attributes
+and classes of rfc3986.
+"""
+
+from .iri import IRIReference
+from .parseresult import ParseResult
+from .uri import URIReference
+
+
+def uri_reference(uri, encoding='utf-8'):
+    """Parse a URI string into a URIReference.
+
+    This is a convenience function. You could achieve the same end by using
+    ``URIReference.from_string(uri)``.
+
+    :param str uri: The URI which needs to be parsed into a reference.
+    :param str encoding: The encoding of the string provided
+    :returns: A parsed URI
+    :rtype: :class:`URIReference`
+    """
+    return URIReference.from_string(uri, encoding)
+
+
+def iri_reference(iri, encoding='utf-8'):
+    """Parse a IRI string into an IRIReference.
+
+    This is a convenience function. You could achieve the same end by using
+    ``IRIReference.from_string(iri)``.
+
+    :param str iri: The IRI which needs to be parsed into a reference.
+    :param str encoding: The encoding of the string provided
+    :returns: A parsed IRI
+    :rtype: :class:`IRIReference`
+    """
+    return IRIReference.from_string(iri, encoding)
+
+
+def is_valid_uri(uri, encoding='utf-8', **kwargs):
+    """Determine if the URI given is valid.
+
+    This is a convenience function. You could use either
+    ``uri_reference(uri).is_valid()`` or
+    ``URIReference.from_string(uri).is_valid()`` to achieve the same result.
+
+    :param str uri: The URI to be validated.
+    :param str encoding: The encoding of the string provided
+    :param bool require_scheme: Set to ``True`` if you wish to require the
+        presence of the scheme component.
+    :param bool require_authority: Set to ``True`` if you wish to require the
+        presence of the authority component.
+    :param bool require_path: Set to ``True`` if you wish to require the
+        presence of the path component.
+    :param bool require_query: Set to ``True`` if you wish to require the
+        presence of the query component.
+    :param bool require_fragment: Set to ``True`` if you wish to require the
+        presence of the fragment component.
+    :returns: ``True`` if the URI is valid, ``False`` otherwise.
+    :rtype: bool
+    """
+    return URIReference.from_string(uri, encoding).is_valid(**kwargs)
+
+
+def normalize_uri(uri, encoding='utf-8'):
+    """Normalize the given URI.
+
+    This is a convenience function. You could use either
+    ``uri_reference(uri).normalize().unsplit()`` or
+    ``URIReference.from_string(uri).normalize().unsplit()`` instead.
+
+    :param str uri: The URI to be normalized.
+    :param str encoding: The encoding of the string provided
+    :returns: The normalized URI.
+    :rtype: str
+    """
+    normalized_reference = URIReference.from_string(uri, encoding).normalize()
+    return normalized_reference.unsplit()
+
+
+def urlparse(uri, encoding='utf-8'):
+    """Parse a given URI and return a ParseResult.
+
+    This is a partial replacement of the standard library's urlparse function.
+
+    :param str uri: The URI to be parsed.
+    :param str encoding: The encoding of the string provided.
+    :returns: A parsed URI
+    :rtype: :class:`~rfc3986.parseresult.ParseResult`
+    """
+    return ParseResult.from_string(uri, encoding, strict=False)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/builder.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/builder.py
new file mode 100644
index 00000000..79342799
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/builder.py
@@ -0,0 +1,298 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017 Ian Stapleton Cordasco
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module containing the logic for the URIBuilder object."""
+from . import compat
+from . import normalizers
+from . import uri
+
+
+class URIBuilder(object):
+    """Object to aid in building up a URI Reference from parts.
+
+    .. note::
+
+        This object should be instantiated by the user, but it's recommended
+        that it is not provided with arguments. Instead, use the available
+        method to populate the fields.
+
+    """
+
+    def __init__(self, scheme=None, userinfo=None, host=None, port=None,
+                 path=None, query=None, fragment=None):
+        """Initialize our URI builder.
+
+        :param str scheme:
+            (optional)
+        :param str userinfo:
+            (optional)
+        :param str host:
+            (optional)
+        :param int port:
+            (optional)
+        :param str path:
+            (optional)
+        :param str query:
+            (optional)
+        :param str fragment:
+            (optional)
+        """
+        self.scheme = scheme
+        self.userinfo = userinfo
+        self.host = host
+        self.port = port
+        self.path = path
+        self.query = query
+        self.fragment = fragment
+
+    def __repr__(self):
+        """Provide a convenient view of our builder object."""
+        formatstr = ('URIBuilder(scheme={b.scheme}, userinfo={b.userinfo}, '
+                     'host={b.host}, port={b.port}, path={b.path}, '
+                     'query={b.query}, fragment={b.fragment})')
+        return formatstr.format(b=self)
+
+    def add_scheme(self, scheme):
+        """Add a scheme to our builder object.
+
+        After normalizing, this will generate a new URIBuilder instance with
+        the specified scheme and all other attributes the same.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_scheme('HTTPS')
+            URIBuilder(scheme='https', userinfo=None, host=None, port=None,
+                    path=None, query=None, fragment=None)
+
+        """
+        scheme = normalizers.normalize_scheme(scheme)
+        return URIBuilder(
+            scheme=scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port=self.port,
+            path=self.path,
+            query=self.query,
+            fragment=self.fragment,
+        )
+
+    def add_credentials(self, username, password):
+        """Add credentials as the userinfo portion of the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_credentials('root', 's3crete')
+            URIBuilder(scheme=None, userinfo='root:s3crete', host=None,
+                    port=None, path=None, query=None, fragment=None)
+
+            >>> URIBuilder().add_credentials('root', None)
+            URIBuilder(scheme=None, userinfo='root', host=None,
+                    port=None, path=None, query=None, fragment=None)
+        """
+        if username is None:
+            raise ValueError('Username cannot be None')
+        userinfo = normalizers.normalize_username(username)
+
+        if password is not None:
+            userinfo = '{}:{}'.format(
+                userinfo,
+                normalizers.normalize_password(password),
+            )
+
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=userinfo,
+            host=self.host,
+            port=self.port,
+            path=self.path,
+            query=self.query,
+            fragment=self.fragment,
+        )
+
+    def add_host(self, host):
+        """Add hostname to the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_host('google.com')
+            URIBuilder(scheme=None, userinfo=None, host='google.com',
+                    port=None, path=None, query=None, fragment=None)
+
+        """
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=normalizers.normalize_host(host),
+            port=self.port,
+            path=self.path,
+            query=self.query,
+            fragment=self.fragment,
+        )
+
+    def add_port(self, port):
+        """Add port to the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_port(80)
+            URIBuilder(scheme=None, userinfo=None, host=None, port='80',
+                    path=None, query=None, fragment=None)
+
+            >>> URIBuilder().add_port(443)
+            URIBuilder(scheme=None, userinfo=None, host=None, port='443',
+                    path=None, query=None, fragment=None)
+
+        """
+        port_int = int(port)
+        if port_int < 0:
+            raise ValueError(
+                'ports are not allowed to be negative. You provided {}'.format(
+                    port_int,
+                )
+            )
+        if port_int > 65535:
+            raise ValueError(
+                'ports are not allowed to be larger than 65535. '
+                'You provided {}'.format(
+                    port_int,
+                )
+            )
+
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port='{}'.format(port_int),
+            path=self.path,
+            query=self.query,
+            fragment=self.fragment,
+        )
+
+    def add_path(self, path):
+        """Add a path to the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_path('sigmavirus24/rfc3985')
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path='/sigmavirus24/rfc3986', query=None, fragment=None)
+
+            >>> URIBuilder().add_path('/checkout.php')
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path='/checkout.php', query=None, fragment=None)
+
+        """
+        if not path.startswith('/'):
+            path = '/{}'.format(path)
+
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port=self.port,
+            path=normalizers.normalize_path(path),
+            query=self.query,
+            fragment=self.fragment,
+        )
+
+    def add_query_from(self, query_items):
+        """Generate and add a query a dictionary or list of tuples.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_query_from({'a': 'b c'})
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path=None, query='a=b+c', fragment=None)
+
+            >>> URIBuilder().add_query_from([('a', 'b c')])
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path=None, query='a=b+c', fragment=None)
+
+        """
+        query = normalizers.normalize_query(compat.urlencode(query_items))
+
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port=self.port,
+            path=self.path,
+            query=query,
+            fragment=self.fragment,
+        )
+
+    def add_query(self, query):
+        """Add a pre-formated query string to the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_query('a=b&c=d')
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path=None, query='a=b&c=d', fragment=None)
+
+        """
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port=self.port,
+            path=self.path,
+            query=normalizers.normalize_query(query),
+            fragment=self.fragment,
+        )
+
+    def add_fragment(self, fragment):
+        """Add a fragment to the URI.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_fragment('section-2.6.1')
+            URIBuilder(scheme=None, userinfo=None, host=None, port=None,
+                    path=None, query=None, fragment='section-2.6.1')
+
+        """
+        return URIBuilder(
+            scheme=self.scheme,
+            userinfo=self.userinfo,
+            host=self.host,
+            port=self.port,
+            path=self.path,
+            query=self.query,
+            fragment=normalizers.normalize_fragment(fragment),
+        )
+
+    def finalize(self):
+        """Create a URIReference from our builder.
+
+        .. code-block:: python
+
+            >>> URIBuilder().add_scheme('https').add_host('github.com'
+            ...     ).add_path('sigmavirus24/rfc3986').finalize().unsplit()
+            'https://github.com/sigmavirus24/rfc3986'
+
+            >>> URIBuilder().add_scheme('https').add_host('github.com'
+            ...     ).add_path('sigmavirus24/rfc3986').add_credentials(
+            ...     'sigmavirus24', 'not-re@l').finalize().unsplit()
+            'https://sigmavirus24:not-re%40l@github.com/sigmavirus24/rfc3986'
+
+        """
+        return uri.URIReference(
+            self.scheme,
+            normalizers.normalize_authority(
+                (self.userinfo, self.host, self.port)
+            ),
+            self.path,
+            self.query,
+            self.fragment,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/compat.py
new file mode 100644
index 00000000..8968c384
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/compat.py
@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Compatibility module for Python 2 and 3 support."""
+import sys
+
+try:
+    from urllib.parse import quote as urlquote
+except ImportError:  # Python 2.x
+    from urllib import quote as urlquote
+
+try:
+    from urllib.parse import urlencode
+except ImportError:  # Python 2.x
+    from urllib import urlencode
+
+__all__ = (
+    'to_bytes',
+    'to_str',
+    'urlquote',
+    'urlencode',
+)
+
+PY3 = (3, 0) <= sys.version_info < (4, 0)
+PY2 = (2, 6) <= sys.version_info < (2, 8)
+
+
+if PY3:
+    unicode = str  # Python 3.x
+
+
+def to_str(b, encoding='utf-8'):
+    """Ensure that b is text in the specified encoding."""
+    if hasattr(b, 'decode') and not isinstance(b, unicode):
+        b = b.decode(encoding)
+    return b
+
+
+def to_bytes(s, encoding='utf-8'):
+    """Ensure that s is converted to bytes from the encoding."""
+    if hasattr(s, 'encode') and not isinstance(s, bytes):
+        s = s.encode(encoding)
+    return s
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/exceptions.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/exceptions.py
new file mode 100644
index 00000000..da8ca7cb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/exceptions.py
@@ -0,0 +1,118 @@
+# -*- coding: utf-8 -*-
+"""Exceptions module for rfc3986."""
+
+from . import compat
+
+
+class RFC3986Exception(Exception):
+    """Base class for all rfc3986 exception classes."""
+
+    pass
+
+
+class InvalidAuthority(RFC3986Exception):
+    """Exception when the authority string is invalid."""
+
+    def __init__(self, authority):
+        """Initialize the exception with the invalid authority."""
+        super(InvalidAuthority, self).__init__(
+            u"The authority ({0}) is not valid.".format(
+                compat.to_str(authority)))
+
+
+class InvalidPort(RFC3986Exception):
+    """Exception when the port is invalid."""
+
+    def __init__(self, port):
+        """Initialize the exception with the invalid port."""
+        super(InvalidPort, self).__init__(
+            'The port ("{0}") is not valid.'.format(port))
+
+
+class ResolutionError(RFC3986Exception):
+    """Exception to indicate a failure to resolve a URI."""
+
+    def __init__(self, uri):
+        """Initialize the error with the failed URI."""
+        super(ResolutionError, self).__init__(
+            "{0} is not an absolute URI.".format(uri.unsplit()))
+
+
+class ValidationError(RFC3986Exception):
+    """Exception raised during Validation of a URI."""
+
+    pass
+
+
+class MissingComponentError(ValidationError):
+    """Exception raised when a required component is missing."""
+
+    def __init__(self, uri, *component_names):
+        """Initialize the error with the missing component name."""
+        verb = 'was'
+        if len(component_names) > 1:
+            verb = 'were'
+
+        self.uri = uri
+        self.components = sorted(component_names)
+        components = ', '.join(self.components)
+        super(MissingComponentError, self).__init__(
+            "{} {} required but missing".format(components, verb),
+            uri,
+            self.components,
+        )
+
+
+class UnpermittedComponentError(ValidationError):
+    """Exception raised when a component has an unpermitted value."""
+
+    def __init__(self, component_name, component_value, allowed_values):
+        """Initialize the error with the unpermitted component."""
+        super(UnpermittedComponentError, self).__init__(
+            "{} was required to be one of {!r} but was {!r}".format(
+                component_name, list(sorted(allowed_values)), component_value,
+            ),
+            component_name,
+            component_value,
+            allowed_values,
+        )
+        self.component_name = component_name
+        self.component_value = component_value
+        self.allowed_values = allowed_values
+
+
+class PasswordForbidden(ValidationError):
+    """Exception raised when a URL has a password in the userinfo section."""
+
+    def __init__(self, uri):
+        """Initialize the error with the URI that failed validation."""
+        unsplit = getattr(uri, 'unsplit', lambda: uri)
+        super(PasswordForbidden, self).__init__(
+            '"{}" contained a password when validation forbade it'.format(
+                unsplit()
+            )
+        )
+        self.uri = uri
+
+
+class InvalidComponentsError(ValidationError):
+    """Exception raised when one or more components are invalid."""
+
+    def __init__(self, uri, *component_names):
+        """Initialize the error with the invalid component name(s)."""
+        verb = 'was'
+        if len(component_names) > 1:
+            verb = 'were'
+
+        self.uri = uri
+        self.components = sorted(component_names)
+        components = ', '.join(self.components)
+        super(InvalidComponentsError, self).__init__(
+            "{} {} found to be invalid".format(components, verb),
+            uri,
+            self.components,
+        )
+
+
+class MissingDependencyError(RFC3986Exception):
+    """Exception raised when an IRI is encoded without the 'idna' module."""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/iri.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/iri.py
new file mode 100644
index 00000000..416cae4a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/iri.py
@@ -0,0 +1,147 @@
+"""Module containing the implementation of the IRIReference class."""
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Copyright (c) 2015 Ian Stapleton Cordasco
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from collections import namedtuple
+
+from . import compat
+from . import exceptions
+from . import misc
+from . import normalizers
+from . import uri
+
+
+try:
+    from pip._vendor import idna
+except ImportError:  # pragma: no cover
+    idna = None
+
+
+class IRIReference(namedtuple('IRIReference', misc.URI_COMPONENTS),
+                   uri.URIMixin):
+    """Immutable object representing a parsed IRI Reference.
+
+    Can be encoded into an URIReference object via the procedure
+    specified in RFC 3987 Section 3.1
+
+     .. note::
+        The IRI submodule is a new interface and may possibly change in
+        the future. Check for changes to the interface when upgrading.
+    """
+
+    slots = ()
+
+    def __new__(cls, scheme, authority, path, query, fragment,
+                encoding='utf-8'):
+        """Create a new IRIReference."""
+        ref = super(IRIReference, cls).__new__(
+            cls,
+            scheme or None,
+            authority or None,
+            path or None,
+            query,
+            fragment)
+        ref.encoding = encoding
+        return ref
+
+    def __eq__(self, other):
+        """Compare this reference to another."""
+        other_ref = other
+        if isinstance(other, tuple):
+            other_ref = self.__class__(*other)
+        elif not isinstance(other, IRIReference):
+            try:
+                other_ref = self.__class__.from_string(other)
+            except TypeError:
+                raise TypeError(
+                    'Unable to compare {0}() to {1}()'.format(
+                        type(self).__name__, type(other).__name__))
+
+        # See http://tools.ietf.org/html/rfc3986#section-6.2
+        return tuple(self) == tuple(other_ref)
+
+    def _match_subauthority(self):
+        return misc.ISUBAUTHORITY_MATCHER.match(self.authority)
+
+    @classmethod
+    def from_string(cls, iri_string, encoding='utf-8'):
+        """Parse a IRI reference from the given unicode IRI string.
+
+        :param str iri_string: Unicode IRI to be parsed into a reference.
+        :param str encoding: The encoding of the string provided
+        :returns: :class:`IRIReference` or subclass thereof
+        """
+        iri_string = compat.to_str(iri_string, encoding)
+
+        split_iri = misc.IRI_MATCHER.match(iri_string).groupdict()
+        return cls(
+            split_iri['scheme'], split_iri['authority'],
+            normalizers.encode_component(split_iri['path'], encoding),
+            normalizers.encode_component(split_iri['query'], encoding),
+            normalizers.encode_component(split_iri['fragment'], encoding),
+            encoding,
+        )
+
+    def encode(self, idna_encoder=None):  # noqa: C901
+        """Encode an IRIReference into a URIReference instance.
+
+        If the ``idna`` module is installed or the ``rfc3986[idna]``
+        extra is used then unicode characters in the IRI host
+        component will be encoded with IDNA2008.
+
+        :param idna_encoder:
+            Function that encodes each part of the host component
+            If not given will raise an exception if the IRI
+            contains a host component.
+        :rtype: uri.URIReference
+        :returns: A URI reference
+        """
+        authority = self.authority
+        if authority:
+            if idna_encoder is None:
+                if idna is None:  # pragma: no cover
+                    raise exceptions.MissingDependencyError(
+                        "Could not import the 'idna' module "
+                        "and the IRI hostname requires encoding"
+                    )
+
+                def idna_encoder(name):
+                    if any(ord(c) > 128 for c in name):
+                        try:
+                            return idna.encode(name.lower(),
+                                               strict=True,
+                                               std3_rules=True)
+                        except idna.IDNAError:
+                            raise exceptions.InvalidAuthority(self.authority)
+                    return name
+
+            authority = ""
+            if self.host:
+                authority = ".".join([compat.to_str(idna_encoder(part))
+                                      for part in self.host.split(".")])
+
+            if self.userinfo is not None:
+                authority = (normalizers.encode_component(
+                             self.userinfo, self.encoding) + '@' + authority)
+
+            if self.port is not None:
+                authority += ":" + str(self.port)
+
+        return uri.URIReference(self.scheme,
+                                authority,
+                                path=self.path,
+                                query=self.query,
+                                fragment=self.fragment,
+                                encoding=self.encoding)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/misc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/misc.py
new file mode 100644
index 00000000..b735e044
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/misc.py
@@ -0,0 +1,124 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Module containing compiled regular expressions and constants.
+
+This module contains important constants, patterns, and compiled regular
+expressions for parsing and validating URIs and their components.
+"""
+
+import re
+
+from . import abnf_regexp
+
+# These are enumerated for the named tuple used as a superclass of
+# URIReference
+URI_COMPONENTS = ['scheme', 'authority', 'path', 'query', 'fragment']
+
+important_characters = {
+    'generic_delimiters': abnf_regexp.GENERIC_DELIMITERS,
+    'sub_delimiters': abnf_regexp.SUB_DELIMITERS,
+    # We need to escape the '*' in this case
+    're_sub_delimiters': abnf_regexp.SUB_DELIMITERS_RE,
+    'unreserved_chars': abnf_regexp.UNRESERVED_CHARS,
+    # We need to escape the '-' in this case:
+    're_unreserved': abnf_regexp.UNRESERVED_RE,
+}
+
+# For details about delimiters and reserved characters, see:
+# http://tools.ietf.org/html/rfc3986#section-2.2
+GENERIC_DELIMITERS = abnf_regexp.GENERIC_DELIMITERS_SET
+SUB_DELIMITERS = abnf_regexp.SUB_DELIMITERS_SET
+RESERVED_CHARS = abnf_regexp.RESERVED_CHARS_SET
+# For details about unreserved characters, see:
+# http://tools.ietf.org/html/rfc3986#section-2.3
+UNRESERVED_CHARS = abnf_regexp.UNRESERVED_CHARS_SET
+NON_PCT_ENCODED = abnf_regexp.NON_PCT_ENCODED_SET
+
+URI_MATCHER = re.compile(abnf_regexp.URL_PARSING_RE)
+
+SUBAUTHORITY_MATCHER = re.compile((
+    '^(?:(?P<userinfo>{0})@)?'  # userinfo
+    '(?P<host>{1})'  # host
+    ':?(?P<port>{2})?$'  # port
+    ).format(abnf_regexp.USERINFO_RE,
+             abnf_regexp.HOST_PATTERN,
+             abnf_regexp.PORT_RE))
+
+
+HOST_MATCHER = re.compile('^' + abnf_regexp.HOST_RE + '$')
+IPv4_MATCHER = re.compile('^' + abnf_regexp.IPv4_RE + '$')
+IPv6_MATCHER = re.compile(r'^\[' + abnf_regexp.IPv6_ADDRZ_RFC4007_RE + r'\]$')
+
+# Used by host validator
+IPv6_NO_RFC4007_MATCHER = re.compile(r'^\[%s\]$' % (
+    abnf_regexp.IPv6_ADDRZ_RE
+))
+
+# Matcher used to validate path components
+PATH_MATCHER = re.compile(abnf_regexp.PATH_RE)
+
+
+# ##################################
+# Query and Fragment Matcher Section
+# ##################################
+
+QUERY_MATCHER = re.compile(abnf_regexp.QUERY_RE)
+
+FRAGMENT_MATCHER = QUERY_MATCHER
+
+# Scheme validation, see: http://tools.ietf.org/html/rfc3986#section-3.1
+SCHEME_MATCHER = re.compile('^{0}$'.format(abnf_regexp.SCHEME_RE))
+
+RELATIVE_REF_MATCHER = re.compile(r'^%s(\?%s)?(#%s)?$' % (
+    abnf_regexp.RELATIVE_PART_RE,
+    abnf_regexp.QUERY_RE,
+    abnf_regexp.FRAGMENT_RE,
+))
+
+# See http://tools.ietf.org/html/rfc3986#section-4.3
+ABSOLUTE_URI_MATCHER = re.compile(r'^%s:%s(\?%s)?$' % (
+    abnf_regexp.COMPONENT_PATTERN_DICT['scheme'],
+    abnf_regexp.HIER_PART_RE,
+    abnf_regexp.QUERY_RE[1:-1],
+))
+
+# ###############
+# IRIs / RFC 3987
+# ###############
+
+IRI_MATCHER = re.compile(abnf_regexp.URL_PARSING_RE, re.UNICODE)
+
+ISUBAUTHORITY_MATCHER = re.compile((
+    u'^(?:(?P<userinfo>{0})@)?'  # iuserinfo
+    u'(?P<host>{1})'  # ihost
+    u':?(?P<port>{2})?$'  # port
+    ).format(abnf_regexp.IUSERINFO_RE,
+             abnf_regexp.IHOST_RE,
+             abnf_regexp.PORT_RE), re.UNICODE)
+
+
+# Path merger as defined in http://tools.ietf.org/html/rfc3986#section-5.2.3
+def merge_paths(base_uri, relative_path):
+    """Merge a base URI's path with a relative URI's path."""
+    if base_uri.path is None and base_uri.authority is not None:
+        return '/' + relative_path
+    else:
+        path = base_uri.path or ''
+        index = path.rfind('/')
+        return path[:index] + '/' + relative_path
+
+
+UseExisting = object()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/normalizers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/normalizers.py
new file mode 100644
index 00000000..2eb1bb36
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/normalizers.py
@@ -0,0 +1,167 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module with functions to normalize components."""
+import re
+
+from . import compat
+from . import misc
+
+
+def normalize_scheme(scheme):
+    """Normalize the scheme component."""
+    return scheme.lower()
+
+
+def normalize_authority(authority):
+    """Normalize an authority tuple to a string."""
+    userinfo, host, port = authority
+    result = ''
+    if userinfo:
+        result += normalize_percent_characters(userinfo) + '@'
+    if host:
+        result += normalize_host(host)
+    if port:
+        result += ':' + port
+    return result
+
+
+def normalize_username(username):
+    """Normalize a username to make it safe to include in userinfo."""
+    return compat.urlquote(username)
+
+
+def normalize_password(password):
+    """Normalize a password to make safe for userinfo."""
+    return compat.urlquote(password)
+
+
+def normalize_host(host):
+    """Normalize a host string."""
+    if misc.IPv6_MATCHER.match(host):
+        percent = host.find('%')
+        if percent != -1:
+            percent_25 = host.find('%25')
+
+            # Replace RFC 4007 IPv6 Zone ID delimiter '%' with '%25'
+            # from RFC 6874. If the host is '[<IPv6 addr>%25]' then we
+            # assume RFC 4007 and normalize to '[<IPV6 addr>%2525]'
+            if percent_25 == -1 or percent < percent_25 or \
+                    (percent == percent_25 and percent_25 == len(host) - 4):
+                host = host.replace('%', '%25', 1)
+
+            # Don't normalize the casing of the Zone ID
+            return host[:percent].lower() + host[percent:]
+
+    return host.lower()
+
+
+def normalize_path(path):
+    """Normalize the path string."""
+    if not path:
+        return path
+
+    path = normalize_percent_characters(path)
+    return remove_dot_segments(path)
+
+
+def normalize_query(query):
+    """Normalize the query string."""
+    if not query:
+        return query
+    return normalize_percent_characters(query)
+
+
+def normalize_fragment(fragment):
+    """Normalize the fragment string."""
+    if not fragment:
+        return fragment
+    return normalize_percent_characters(fragment)
+
+
+PERCENT_MATCHER = re.compile('%[A-Fa-f0-9]{2}')
+
+
+def normalize_percent_characters(s):
+    """All percent characters should be upper-cased.
+
+    For example, ``"%3afoo%DF%ab"`` should be turned into ``"%3Afoo%DF%AB"``.
+    """
+    matches = set(PERCENT_MATCHER.findall(s))
+    for m in matches:
+        if not m.isupper():
+            s = s.replace(m, m.upper())
+    return s
+
+
+def remove_dot_segments(s):
+    """Remove dot segments from the string.
+
+    See also Section 5.2.4 of :rfc:`3986`.
+    """
+    # See http://tools.ietf.org/html/rfc3986#section-5.2.4 for pseudo-code
+    segments = s.split('/')  # Turn the path into a list of segments
+    output = []  # Initialize the variable to use to store output
+
+    for segment in segments:
+        # '.' is the current directory, so ignore it, it is superfluous
+        if segment == '.':
+            continue
+        # Anything other than '..', should be appended to the output
+        elif segment != '..':
+            output.append(segment)
+        # In this case segment == '..', if we can, we should pop the last
+        # element
+        elif output:
+            output.pop()
+
+    # If the path starts with '/' and the output is empty or the first string
+    # is non-empty
+    if s.startswith('/') and (not output or output[0]):
+        output.insert(0, '')
+
+    # If the path starts with '/.' or '/..' ensure we add one more empty
+    # string to add a trailing '/'
+    if s.endswith(('/.', '/..')):
+        output.append('')
+
+    return '/'.join(output)
+
+
+def encode_component(uri_component, encoding):
+    """Encode the specific component in the provided encoding."""
+    if uri_component is None:
+        return uri_component
+
+    # Try to see if the component we're encoding is already percent-encoded
+    # so we can skip all '%' characters but still encode all others.
+    percent_encodings = len(PERCENT_MATCHER.findall(
+                            compat.to_str(uri_component, encoding)))
+
+    uri_bytes = compat.to_bytes(uri_component, encoding)
+    is_percent_encoded = percent_encodings == uri_bytes.count(b'%')
+
+    encoded_uri = bytearray()
+
+    for i in range(0, len(uri_bytes)):
+        # Will return a single character bytestring on both Python 2 & 3
+        byte = uri_bytes[i:i+1]
+        byte_ord = ord(byte)
+        if ((is_percent_encoded and byte == b'%')
+                or (byte_ord < 128 and byte.decode() in misc.NON_PCT_ENCODED)):
+            encoded_uri.extend(byte)
+            continue
+        encoded_uri.extend('%{0:02x}'.format(byte_ord).encode().upper())
+
+    return encoded_uri.decode(encoding)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/parseresult.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/parseresult.py
new file mode 100644
index 00000000..0a734566
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/parseresult.py
@@ -0,0 +1,385 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2015 Ian Stapleton Cordasco
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module containing the urlparse compatibility logic."""
+from collections import namedtuple
+
+from . import compat
+from . import exceptions
+from . import misc
+from . import normalizers
+from . import uri
+
+__all__ = ('ParseResult', 'ParseResultBytes')
+
+PARSED_COMPONENTS = ('scheme', 'userinfo', 'host', 'port', 'path', 'query',
+                     'fragment')
+
+
+class ParseResultMixin(object):
+    def _generate_authority(self, attributes):
+        # I swear I did not align the comparisons below. That's just how they
+        # happened to align based on pep8 and attribute lengths.
+        userinfo, host, port = (attributes[p]
+                                for p in ('userinfo', 'host', 'port'))
+        if (self.userinfo != userinfo or
+                self.host != host or
+                self.port != port):
+            if port:
+                port = '{0}'.format(port)
+            return normalizers.normalize_authority(
+                (compat.to_str(userinfo, self.encoding),
+                 compat.to_str(host, self.encoding),
+                 port)
+            )
+        return self.authority
+
+    def geturl(self):
+        """Shim to match the standard library method."""
+        return self.unsplit()
+
+    @property
+    def hostname(self):
+        """Shim to match the standard library."""
+        return self.host
+
+    @property
+    def netloc(self):
+        """Shim to match the standard library."""
+        return self.authority
+
+    @property
+    def params(self):
+        """Shim to match the standard library."""
+        return self.query
+
+
+class ParseResult(namedtuple('ParseResult', PARSED_COMPONENTS),
+                  ParseResultMixin):
+    """Implementation of urlparse compatibility class.
+
+    This uses the URIReference logic to handle compatibility with the
+    urlparse.ParseResult class.
+    """
+
+    slots = ()
+
+    def __new__(cls, scheme, userinfo, host, port, path, query, fragment,
+                uri_ref, encoding='utf-8'):
+        """Create a new ParseResult."""
+        parse_result = super(ParseResult, cls).__new__(
+            cls,
+            scheme or None,
+            userinfo or None,
+            host,
+            port or None,
+            path or None,
+            query,
+            fragment)
+        parse_result.encoding = encoding
+        parse_result.reference = uri_ref
+        return parse_result
+
+    @classmethod
+    def from_parts(cls, scheme=None, userinfo=None, host=None, port=None,
+                   path=None, query=None, fragment=None, encoding='utf-8'):
+        """Create a ParseResult instance from its parts."""
+        authority = ''
+        if userinfo is not None:
+            authority += userinfo + '@'
+        if host is not None:
+            authority += host
+        if port is not None:
+            authority += ':{0}'.format(port)
+        uri_ref = uri.URIReference(scheme=scheme,
+                                   authority=authority,
+                                   path=path,
+                                   query=query,
+                                   fragment=fragment,
+                                   encoding=encoding).normalize()
+        userinfo, host, port = authority_from(uri_ref, strict=True)
+        return cls(scheme=uri_ref.scheme,
+                   userinfo=userinfo,
+                   host=host,
+                   port=port,
+                   path=uri_ref.path,
+                   query=uri_ref.query,
+                   fragment=uri_ref.fragment,
+                   uri_ref=uri_ref,
+                   encoding=encoding)
+
+    @classmethod
+    def from_string(cls, uri_string, encoding='utf-8', strict=True,
+                    lazy_normalize=True):
+        """Parse a URI from the given unicode URI string.
+
+        :param str uri_string: Unicode URI to be parsed into a reference.
+        :param str encoding: The encoding of the string provided
+        :param bool strict: Parse strictly according to :rfc:`3986` if True.
+            If False, parse similarly to the standard library's urlparse
+            function.
+        :returns: :class:`ParseResult` or subclass thereof
+        """
+        reference = uri.URIReference.from_string(uri_string, encoding)
+        if not lazy_normalize:
+            reference = reference.normalize()
+        userinfo, host, port = authority_from(reference, strict)
+
+        return cls(scheme=reference.scheme,
+                   userinfo=userinfo,
+                   host=host,
+                   port=port,
+                   path=reference.path,
+                   query=reference.query,
+                   fragment=reference.fragment,
+                   uri_ref=reference,
+                   encoding=encoding)
+
+    @property
+    def authority(self):
+        """Return the normalized authority."""
+        return self.reference.authority
+
+    def copy_with(self, scheme=misc.UseExisting, userinfo=misc.UseExisting,
+                  host=misc.UseExisting, port=misc.UseExisting,
+                  path=misc.UseExisting, query=misc.UseExisting,
+                  fragment=misc.UseExisting):
+        """Create a copy of this instance replacing with specified parts."""
+        attributes = zip(PARSED_COMPONENTS,
+                         (scheme, userinfo, host, port, path, query, fragment))
+        attrs_dict = {}
+        for name, value in attributes:
+            if value is misc.UseExisting:
+                value = getattr(self, name)
+            attrs_dict[name] = value
+        authority = self._generate_authority(attrs_dict)
+        ref = self.reference.copy_with(scheme=attrs_dict['scheme'],
+                                       authority=authority,
+                                       path=attrs_dict['path'],
+                                       query=attrs_dict['query'],
+                                       fragment=attrs_dict['fragment'])
+        return ParseResult(uri_ref=ref, encoding=self.encoding, **attrs_dict)
+
+    def encode(self, encoding=None):
+        """Convert to an instance of ParseResultBytes."""
+        encoding = encoding or self.encoding
+        attrs = dict(
+            zip(PARSED_COMPONENTS,
+                (attr.encode(encoding) if hasattr(attr, 'encode') else attr
+                 for attr in self)))
+        return ParseResultBytes(
+            uri_ref=self.reference,
+            encoding=encoding,
+            **attrs
+        )
+
+    def unsplit(self, use_idna=False):
+        """Create a URI string from the components.
+
+        :returns: The parsed URI reconstituted as a string.
+        :rtype: str
+        """
+        parse_result = self
+        if use_idna and self.host:
+            hostbytes = self.host.encode('idna')
+            host = hostbytes.decode(self.encoding)
+            parse_result = self.copy_with(host=host)
+        return parse_result.reference.unsplit()
+
+
+class ParseResultBytes(namedtuple('ParseResultBytes', PARSED_COMPONENTS),
+                       ParseResultMixin):
+    """Compatibility shim for the urlparse.ParseResultBytes object."""
+
+    def __new__(cls, scheme, userinfo, host, port, path, query, fragment,
+                uri_ref, encoding='utf-8', lazy_normalize=True):
+        """Create a new ParseResultBytes instance."""
+        parse_result = super(ParseResultBytes, cls).__new__(
+            cls,
+            scheme or None,
+            userinfo or None,
+            host,
+            port or None,
+            path or None,
+            query or None,
+            fragment or None)
+        parse_result.encoding = encoding
+        parse_result.reference = uri_ref
+        parse_result.lazy_normalize = lazy_normalize
+        return parse_result
+
+    @classmethod
+    def from_parts(cls, scheme=None, userinfo=None, host=None, port=None,
+                   path=None, query=None, fragment=None, encoding='utf-8',
+                   lazy_normalize=True):
+        """Create a ParseResult instance from its parts."""
+        authority = ''
+        if userinfo is not None:
+            authority += userinfo + '@'
+        if host is not None:
+            authority += host
+        if port is not None:
+            authority += ':{0}'.format(int(port))
+        uri_ref = uri.URIReference(scheme=scheme,
+                                   authority=authority,
+                                   path=path,
+                                   query=query,
+                                   fragment=fragment,
+                                   encoding=encoding)
+        if not lazy_normalize:
+            uri_ref = uri_ref.normalize()
+        to_bytes = compat.to_bytes
+        userinfo, host, port = authority_from(uri_ref, strict=True)
+        return cls(scheme=to_bytes(scheme, encoding),
+                   userinfo=to_bytes(userinfo, encoding),
+                   host=to_bytes(host, encoding),
+                   port=port,
+                   path=to_bytes(path, encoding),
+                   query=to_bytes(query, encoding),
+                   fragment=to_bytes(fragment, encoding),
+                   uri_ref=uri_ref,
+                   encoding=encoding,
+                   lazy_normalize=lazy_normalize)
+
+    @classmethod
+    def from_string(cls, uri_string, encoding='utf-8', strict=True,
+                    lazy_normalize=True):
+        """Parse a URI from the given unicode URI string.
+
+        :param str uri_string: Unicode URI to be parsed into a reference.
+        :param str encoding: The encoding of the string provided
+        :param bool strict: Parse strictly according to :rfc:`3986` if True.
+            If False, parse similarly to the standard library's urlparse
+            function.
+        :returns: :class:`ParseResultBytes` or subclass thereof
+        """
+        reference = uri.URIReference.from_string(uri_string, encoding)
+        if not lazy_normalize:
+            reference = reference.normalize()
+        userinfo, host, port = authority_from(reference, strict)
+
+        to_bytes = compat.to_bytes
+        return cls(scheme=to_bytes(reference.scheme, encoding),
+                   userinfo=to_bytes(userinfo, encoding),
+                   host=to_bytes(host, encoding),
+                   port=port,
+                   path=to_bytes(reference.path, encoding),
+                   query=to_bytes(reference.query, encoding),
+                   fragment=to_bytes(reference.fragment, encoding),
+                   uri_ref=reference,
+                   encoding=encoding,
+                   lazy_normalize=lazy_normalize)
+
+    @property
+    def authority(self):
+        """Return the normalized authority."""
+        return self.reference.authority.encode(self.encoding)
+
+    def copy_with(self, scheme=misc.UseExisting, userinfo=misc.UseExisting,
+                  host=misc.UseExisting, port=misc.UseExisting,
+                  path=misc.UseExisting, query=misc.UseExisting,
+                  fragment=misc.UseExisting, lazy_normalize=True):
+        """Create a copy of this instance replacing with specified parts."""
+        attributes = zip(PARSED_COMPONENTS,
+                         (scheme, userinfo, host, port, path, query, fragment))
+        attrs_dict = {}
+        for name, value in attributes:
+            if value is misc.UseExisting:
+                value = getattr(self, name)
+            if not isinstance(value, bytes) and hasattr(value, 'encode'):
+                value = value.encode(self.encoding)
+            attrs_dict[name] = value
+        authority = self._generate_authority(attrs_dict)
+        to_str = compat.to_str
+        ref = self.reference.copy_with(
+            scheme=to_str(attrs_dict['scheme'], self.encoding),
+            authority=to_str(authority, self.encoding),
+            path=to_str(attrs_dict['path'], self.encoding),
+            query=to_str(attrs_dict['query'], self.encoding),
+            fragment=to_str(attrs_dict['fragment'], self.encoding)
+        )
+        if not lazy_normalize:
+            ref = ref.normalize()
+        return ParseResultBytes(
+            uri_ref=ref,
+            encoding=self.encoding,
+            lazy_normalize=lazy_normalize,
+            **attrs_dict
+        )
+
+    def unsplit(self, use_idna=False):
+        """Create a URI bytes object from the components.
+
+        :returns: The parsed URI reconstituted as a string.
+        :rtype: bytes
+        """
+        parse_result = self
+        if use_idna and self.host:
+            # self.host is bytes, to encode to idna, we need to decode it
+            # first
+            host = self.host.decode(self.encoding)
+            hostbytes = host.encode('idna')
+            parse_result = self.copy_with(host=hostbytes)
+        if self.lazy_normalize:
+            parse_result = parse_result.copy_with(lazy_normalize=False)
+        uri = parse_result.reference.unsplit()
+        return uri.encode(self.encoding)
+
+
+def split_authority(authority):
+    # Initialize our expected return values
+    userinfo = host = port = None
+    # Initialize an extra var we may need to use
+    extra_host = None
+    # Set-up rest in case there is no userinfo portion
+    rest = authority
+
+    if '@' in authority:
+        userinfo, rest = authority.rsplit('@', 1)
+
+    # Handle IPv6 host addresses
+    if rest.startswith('['):
+        host, rest = rest.split(']', 1)
+        host += ']'
+
+    if ':' in rest:
+        extra_host, port = rest.split(':', 1)
+    elif not host and rest:
+        host = rest
+
+    if extra_host and not host:
+        host = extra_host
+
+    return userinfo, host, port
+
+
+def authority_from(reference, strict):
+    try:
+        subauthority = reference.authority_info()
+    except exceptions.InvalidAuthority:
+        if strict:
+            raise
+        userinfo, host, port = split_authority(reference.authority)
+    else:
+        # Thanks to Richard Barrell for this idea:
+        # https://twitter.com/0x2ba22e11/status/617338811975139328
+        userinfo, host, port = (subauthority.get(p)
+                                for p in ('userinfo', 'host', 'port'))
+
+    if port:
+        try:
+            port = int(port)
+        except ValueError:
+            raise exceptions.InvalidPort(port)
+    return userinfo, host, port
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/uri.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/uri.py
new file mode 100644
index 00000000..d1d71505
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/uri.py
@@ -0,0 +1,153 @@
+"""Module containing the implementation of the URIReference class."""
+# -*- coding: utf-8 -*-
+# Copyright (c) 2014 Rackspace
+# Copyright (c) 2015 Ian Stapleton Cordasco
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from collections import namedtuple
+
+from . import compat
+from . import misc
+from . import normalizers
+from ._mixin import URIMixin
+
+
+class URIReference(namedtuple('URIReference', misc.URI_COMPONENTS), URIMixin):
+    """Immutable object representing a parsed URI Reference.
+
+    .. note::
+
+        This class is not intended to be directly instantiated by the user.
+
+    This object exposes attributes for the following components of a
+    URI:
+
+    - scheme
+    - authority
+    - path
+    - query
+    - fragment
+
+    .. attribute:: scheme
+
+        The scheme that was parsed for the URI Reference. For example,
+        ``http``, ``https``, ``smtp``, ``imap``, etc.
+
+    .. attribute:: authority
+
+        Component of the URI that contains the user information, host,
+        and port sub-components. For example,
+        ``google.com``, ``127.0.0.1:5000``, ``username@[::1]``,
+        ``username:password@example.com:443``, etc.
+
+    .. attribute:: path
+
+        The path that was parsed for the given URI Reference. For example,
+        ``/``, ``/index.php``, etc.
+
+    .. attribute:: query
+
+        The query component for a given URI Reference. For example, ``a=b``,
+        ``a=b%20c``, ``a=b+c``, ``a=b,c=d,e=%20f``, etc.
+
+    .. attribute:: fragment
+
+        The fragment component of a URI. For example, ``section-3.1``.
+
+    This class also provides extra attributes for easier access to information
+    like the subcomponents of the authority component.
+
+    .. attribute:: userinfo
+
+        The user information parsed from the authority.
+
+    .. attribute:: host
+
+        The hostname, IPv4, or IPv6 adddres parsed from the authority.
+
+    .. attribute:: port
+
+        The port parsed from the authority.
+    """
+
+    slots = ()
+
+    def __new__(cls, scheme, authority, path, query, fragment,
+                encoding='utf-8'):
+        """Create a new URIReference."""
+        ref = super(URIReference, cls).__new__(
+            cls,
+            scheme or None,
+            authority or None,
+            path or None,
+            query,
+            fragment)
+        ref.encoding = encoding
+        return ref
+
+    __hash__ = tuple.__hash__
+
+    def __eq__(self, other):
+        """Compare this reference to another."""
+        other_ref = other
+        if isinstance(other, tuple):
+            other_ref = URIReference(*other)
+        elif not isinstance(other, URIReference):
+            try:
+                other_ref = URIReference.from_string(other)
+            except TypeError:
+                raise TypeError(
+                    'Unable to compare URIReference() to {0}()'.format(
+                        type(other).__name__))
+
+        # See http://tools.ietf.org/html/rfc3986#section-6.2
+        naive_equality = tuple(self) == tuple(other_ref)
+        return naive_equality or self.normalized_equality(other_ref)
+
+    def normalize(self):
+        """Normalize this reference as described in Section 6.2.2.
+
+        This is not an in-place normalization. Instead this creates a new
+        URIReference.
+
+        :returns: A new reference object with normalized components.
+        :rtype: URIReference
+        """
+        # See http://tools.ietf.org/html/rfc3986#section-6.2.2 for logic in
+        # this method.
+        return URIReference(normalizers.normalize_scheme(self.scheme or ''),
+                            normalizers.normalize_authority(
+                                (self.userinfo, self.host, self.port)),
+                            normalizers.normalize_path(self.path or ''),
+                            normalizers.normalize_query(self.query),
+                            normalizers.normalize_fragment(self.fragment),
+                            self.encoding)
+
+    @classmethod
+    def from_string(cls, uri_string, encoding='utf-8'):
+        """Parse a URI reference from the given unicode URI string.
+
+        :param str uri_string: Unicode URI to be parsed into a reference.
+        :param str encoding: The encoding of the string provided
+        :returns: :class:`URIReference` or subclass thereof
+        """
+        uri_string = compat.to_str(uri_string, encoding)
+
+        split_uri = misc.URI_MATCHER.match(uri_string).groupdict()
+        return cls(
+            split_uri['scheme'], split_uri['authority'],
+            normalizers.encode_component(split_uri['path'], encoding),
+            normalizers.encode_component(split_uri['query'], encoding),
+            normalizers.encode_component(split_uri['fragment'], encoding),
+            encoding,
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/validators.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/validators.py
new file mode 100644
index 00000000..7fc97215
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/rfc3986/validators.py
@@ -0,0 +1,450 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017 Ian Stapleton Cordasco
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Module containing the validation logic for rfc3986."""
+from . import exceptions
+from . import misc
+from . import normalizers
+
+
+class Validator(object):
+    """Object used to configure validation of all objects in rfc3986.
+
+    .. versionadded:: 1.0
+
+    Example usage::
+
+         >>> from rfc3986 import api, validators
+         >>> uri = api.uri_reference('https://github.com/')
+         >>> validator = validators.Validator().require_presence_of(
+         ...    'scheme', 'host', 'path',
+         ... ).allow_schemes(
+         ...    'http', 'https',
+         ... ).allow_hosts(
+         ...    '127.0.0.1', 'github.com',
+         ... )
+         >>> validator.validate(uri)
+         >>> invalid_uri = rfc3986.uri_reference('imap://mail.google.com')
+         >>> validator.validate(invalid_uri)
+         Traceback (most recent call last):
+         ...
+         rfc3986.exceptions.MissingComponentError: ('path was required but
+         missing', URIReference(scheme=u'imap', authority=u'mail.google.com',
+         path=None, query=None, fragment=None), ['path'])
+
+    """
+
+    COMPONENT_NAMES = frozenset([
+        'scheme',
+        'userinfo',
+        'host',
+        'port',
+        'path',
+        'query',
+        'fragment',
+    ])
+
+    def __init__(self):
+        """Initialize our default validations."""
+        self.allowed_schemes = set()
+        self.allowed_hosts = set()
+        self.allowed_ports = set()
+        self.allow_password = True
+        self.required_components = {
+            'scheme': False,
+            'userinfo': False,
+            'host': False,
+            'port': False,
+            'path': False,
+            'query': False,
+            'fragment': False,
+        }
+        self.validated_components = self.required_components.copy()
+
+    def allow_schemes(self, *schemes):
+        """Require the scheme to be one of the provided schemes.
+
+        .. versionadded:: 1.0
+
+        :param schemes:
+            Schemes, without ``://`` that are allowed.
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        for scheme in schemes:
+            self.allowed_schemes.add(normalizers.normalize_scheme(scheme))
+        return self
+
+    def allow_hosts(self, *hosts):
+        """Require the host to be one of the provided hosts.
+
+        .. versionadded:: 1.0
+
+        :param hosts:
+            Hosts that are allowed.
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        for host in hosts:
+            self.allowed_hosts.add(normalizers.normalize_host(host))
+        return self
+
+    def allow_ports(self, *ports):
+        """Require the port to be one of the provided ports.
+
+        .. versionadded:: 1.0
+
+        :param ports:
+            Ports that are allowed.
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        for port in ports:
+            port_int = int(port, base=10)
+            if 0 <= port_int <= 65535:
+                self.allowed_ports.add(port)
+        return self
+
+    def allow_use_of_password(self):
+        """Allow passwords to be present in the URI.
+
+        .. versionadded:: 1.0
+
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        self.allow_password = True
+        return self
+
+    def forbid_use_of_password(self):
+        """Prevent passwords from being included in the URI.
+
+        .. versionadded:: 1.0
+
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        self.allow_password = False
+        return self
+
+    def check_validity_of(self, *components):
+        """Check the validity of the components provided.
+
+        This can be specified repeatedly.
+
+        .. versionadded:: 1.1
+
+        :param components:
+            Names of components from :attr:`Validator.COMPONENT_NAMES`.
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        components = [c.lower() for c in components]
+        for component in components:
+            if component not in self.COMPONENT_NAMES:
+                raise ValueError(
+                    '"{}" is not a valid component'.format(component)
+                )
+        self.validated_components.update({
+            component: True for component in components
+        })
+        return self
+
+    def require_presence_of(self, *components):
+        """Require the components provided.
+
+        This can be specified repeatedly.
+
+        .. versionadded:: 1.0
+
+        :param components:
+            Names of components from :attr:`Validator.COMPONENT_NAMES`.
+        :returns:
+            The validator instance.
+        :rtype:
+            Validator
+        """
+        components = [c.lower() for c in components]
+        for component in components:
+            if component not in self.COMPONENT_NAMES:
+                raise ValueError(
+                    '"{}" is not a valid component'.format(component)
+                )
+        self.required_components.update({
+            component: True for component in components
+        })
+        return self
+
+    def validate(self, uri):
+        """Check a URI for conditions specified on this validator.
+
+        .. versionadded:: 1.0
+
+        :param uri:
+            Parsed URI to validate.
+        :type uri:
+            rfc3986.uri.URIReference
+        :raises MissingComponentError:
+            When a required component is missing.
+        :raises UnpermittedComponentError:
+            When a component is not one of those allowed.
+        :raises PasswordForbidden:
+            When a password is present in the userinfo component but is
+            not permitted by configuration.
+        :raises InvalidComponentsError:
+            When a component was found to be invalid.
+        """
+        if not self.allow_password:
+            check_password(uri)
+
+        required_components = [
+            component
+            for component, required in self.required_components.items()
+            if required
+        ]
+        validated_components = [
+            component
+            for component, required in self.validated_components.items()
+            if required
+        ]
+        if required_components:
+            ensure_required_components_exist(uri, required_components)
+        if validated_components:
+            ensure_components_are_valid(uri, validated_components)
+
+        ensure_one_of(self.allowed_schemes, uri, 'scheme')
+        ensure_one_of(self.allowed_hosts, uri, 'host')
+        ensure_one_of(self.allowed_ports, uri, 'port')
+
+
+def check_password(uri):
+    """Assert that there is no password present in the uri."""
+    userinfo = uri.userinfo
+    if not userinfo:
+        return
+    credentials = userinfo.split(':', 1)
+    if len(credentials) <= 1:
+        return
+    raise exceptions.PasswordForbidden(uri)
+
+
+def ensure_one_of(allowed_values, uri, attribute):
+    """Assert that the uri's attribute is one of the allowed values."""
+    value = getattr(uri, attribute)
+    if value is not None and allowed_values and value not in allowed_values:
+        raise exceptions.UnpermittedComponentError(
+            attribute, value, allowed_values,
+        )
+
+
+def ensure_required_components_exist(uri, required_components):
+    """Assert that all required components are present in the URI."""
+    missing_components = sorted([
+        component
+        for component in required_components
+        if getattr(uri, component) is None
+    ])
+    if missing_components:
+        raise exceptions.MissingComponentError(uri, *missing_components)
+
+
+def is_valid(value, matcher, require):
+    """Determine if a value is valid based on the provided matcher.
+
+    :param str value:
+        Value to validate.
+    :param matcher:
+        Compiled regular expression to use to validate the value.
+    :param require:
+        Whether or not the value is required.
+    """
+    if require:
+        return (value is not None
+                and matcher.match(value))
+
+    # require is False and value is not None
+    return value is None or matcher.match(value)
+
+
+def authority_is_valid(authority, host=None, require=False):
+    """Determine if the authority string is valid.
+
+    :param str authority:
+        The authority to validate.
+    :param str host:
+        (optional) The host portion of the authority to validate.
+    :param bool require:
+        (optional) Specify if authority must not be None.
+    :returns:
+        ``True`` if valid, ``False`` otherwise
+    :rtype:
+        bool
+    """
+    validated = is_valid(authority, misc.SUBAUTHORITY_MATCHER, require)
+    if validated and host is not None:
+        return host_is_valid(host, require)
+    return validated
+
+
+def host_is_valid(host, require=False):
+    """Determine if the host string is valid.
+
+    :param str host:
+        The host to validate.
+    :param bool require:
+        (optional) Specify if host must not be None.
+    :returns:
+        ``True`` if valid, ``False`` otherwise
+    :rtype:
+        bool
+    """
+    validated = is_valid(host, misc.HOST_MATCHER, require)
+    if validated and host is not None and misc.IPv4_MATCHER.match(host):
+        return valid_ipv4_host_address(host)
+    elif validated and host is not None and misc.IPv6_MATCHER.match(host):
+        return misc.IPv6_NO_RFC4007_MATCHER.match(host) is not None
+    return validated
+
+
+def scheme_is_valid(scheme, require=False):
+    """Determine if the scheme is valid.
+
+    :param str scheme:
+        The scheme string to validate.
+    :param bool require:
+        (optional) Set to ``True`` to require the presence of a scheme.
+    :returns:
+        ``True`` if the scheme is valid. ``False`` otherwise.
+    :rtype:
+        bool
+    """
+    return is_valid(scheme, misc.SCHEME_MATCHER, require)
+
+
+def path_is_valid(path, require=False):
+    """Determine if the path component is valid.
+
+    :param str path:
+        The path string to validate.
+    :param bool require:
+        (optional) Set to ``True`` to require the presence of a path.
+    :returns:
+        ``True`` if the path is valid. ``False`` otherwise.
+    :rtype:
+        bool
+    """
+    return is_valid(path, misc.PATH_MATCHER, require)
+
+
+def query_is_valid(query, require=False):
+    """Determine if the query component is valid.
+
+    :param str query:
+        The query string to validate.
+    :param bool require:
+        (optional) Set to ``True`` to require the presence of a query.
+    :returns:
+        ``True`` if the query is valid. ``False`` otherwise.
+    :rtype:
+        bool
+    """
+    return is_valid(query, misc.QUERY_MATCHER, require)
+
+
+def fragment_is_valid(fragment, require=False):
+    """Determine if the fragment component is valid.
+
+    :param str fragment:
+        The fragment string to validate.
+    :param bool require:
+        (optional) Set to ``True`` to require the presence of a fragment.
+    :returns:
+        ``True`` if the fragment is valid. ``False`` otherwise.
+    :rtype:
+        bool
+    """
+    return is_valid(fragment, misc.FRAGMENT_MATCHER, require)
+
+
+def valid_ipv4_host_address(host):
+    """Determine if the given host is a valid IPv4 address."""
+    # If the host exists, and it might be IPv4, check each byte in the
+    # address.
+    return all([0 <= int(byte, base=10) <= 255 for byte in host.split('.')])
+
+
+_COMPONENT_VALIDATORS = {
+    'scheme': scheme_is_valid,
+    'path': path_is_valid,
+    'query': query_is_valid,
+    'fragment': fragment_is_valid,
+}
+
+_SUBAUTHORITY_VALIDATORS = set(['userinfo', 'host', 'port'])
+
+
+def subauthority_component_is_valid(uri, component):
+    """Determine if the userinfo, host, and port are valid."""
+    try:
+        subauthority_dict = uri.authority_info()
+    except exceptions.InvalidAuthority:
+        return False
+
+    # If we can parse the authority into sub-components and we're not
+    # validating the port, we can assume it's valid.
+    if component == 'host':
+        return host_is_valid(subauthority_dict['host'])
+    elif component != 'port':
+        return True
+
+    try:
+        port = int(subauthority_dict['port'])
+    except TypeError:
+        # If the port wasn't provided it'll be None and int(None) raises a
+        # TypeError
+        return True
+
+    return (0 <= port <= 65535)
+
+
+def ensure_components_are_valid(uri, validated_components):
+    """Assert that all components are valid in the URI."""
+    invalid_components = set([])
+    for component in validated_components:
+        if component in _SUBAUTHORITY_VALIDATORS:
+            if not subauthority_component_is_valid(uri, component):
+                invalid_components.add(component)
+            # Python's peephole optimizer means that while this continue *is*
+            # actually executed, coverage.py cannot detect that. See also,
+            # https://bitbucket.org/ned/coveragepy/issues/198/continue-marked-as-not-covered
+            continue  # nocov: Python 2.7, 3.3, 3.4
+
+        validator = _COMPONENT_VALIDATORS[component]
+        if not validator(getattr(uri, component)):
+            invalid_components.add(component)
+
+    if invalid_components:
+        raise exceptions.InvalidComponentsError(uri, *invalid_components)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/six.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/six.py
new file mode 100644
index 00000000..190c0239
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
new file mode 100644
index 00000000..d6594eb2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
@@ -0,0 +1,19 @@
+import sys
+
+try:
+    # Our match_hostname function is the same as 3.5's, so we only want to
+    # import the match_hostname function if it's at least that good.
+    if sys.version_info < (3, 5):
+        raise ImportError("Fallback to vendored code")
+
+    from ssl import CertificateError, match_hostname
+except ImportError:
+    try:
+        # Backport of the function from a pypi module
+        from backports.ssl_match_hostname import CertificateError, match_hostname
+    except ImportError:
+        # Our vendored copy
+        from ._implementation import CertificateError, match_hostname
+
+# Not needed, but documenting what we provide.
+__all__ = ('CertificateError', 'match_hostname')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..106e7574
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-37.pyc
new file mode 100644
index 00000000..b9b34b08
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
new file mode 100644
index 00000000..970cf653
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
@@ -0,0 +1,156 @@
+"""The match_hostname() function from Python 3.3.3, essential when using SSL."""
+
+# Note: This file is under the PSF license as the code comes from the python
+# stdlib.   http://docs.python.org/3/license.html
+
+import re
+import sys
+
+# ipaddress has been backported to 2.6+ in pypi.  If it is installed on the
+# system, use it to handle IPAddress ServerAltnames (this was added in
+# python-3.5) otherwise only do DNS matching.  This allows
+# backports.ssl_match_hostname to continue to be used in Python 2.7.
+try:
+    from pip._vendor import ipaddress
+except ImportError:
+    ipaddress = None
+
+__version__ = '3.5.0.1'
+
+
+class CertificateError(ValueError):
+    pass
+
+
+def _dnsname_match(dn, hostname, max_wildcards=1):
+    """Matching according to RFC 6125, section 6.4.3
+
+    http://tools.ietf.org/html/rfc6125#section-6.4.3
+    """
+    pats = []
+    if not dn:
+        return False
+
+    # Ported from python3-syntax:
+    # leftmost, *remainder = dn.split(r'.')
+    parts = dn.split(r'.')
+    leftmost = parts[0]
+    remainder = parts[1:]
+
+    wildcards = leftmost.count('*')
+    if wildcards > max_wildcards:
+        # Issue #17980: avoid denials of service by refusing more
+        # than one wildcard per fragment.  A survey of established
+        # policy among SSL implementations showed it to be a
+        # reasonable choice.
+        raise CertificateError(
+            "too many wildcards in certificate DNS name: " + repr(dn))
+
+    # speed up common case w/o wildcards
+    if not wildcards:
+        return dn.lower() == hostname.lower()
+
+    # RFC 6125, section 6.4.3, subitem 1.
+    # The client SHOULD NOT attempt to match a presented identifier in which
+    # the wildcard character comprises a label other than the left-most label.
+    if leftmost == '*':
+        # When '*' is a fragment by itself, it matches a non-empty dotless
+        # fragment.
+        pats.append('[^.]+')
+    elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+        # RFC 6125, section 6.4.3, subitem 3.
+        # The client SHOULD NOT attempt to match a presented identifier
+        # where the wildcard character is embedded within an A-label or
+        # U-label of an internationalized domain name.
+        pats.append(re.escape(leftmost))
+    else:
+        # Otherwise, '*' matches any dotless string, e.g. www*
+        pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+    # add the remaining fragments, ignore any wildcards
+    for frag in remainder:
+        pats.append(re.escape(frag))
+
+    pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+    return pat.match(hostname)
+
+
+def _to_unicode(obj):
+    if isinstance(obj, str) and sys.version_info < (3,):
+        obj = unicode(obj, encoding='ascii', errors='strict')
+    return obj
+
+def _ipaddress_match(ipname, host_ip):
+    """Exact matching of IP addresses.
+
+    RFC 6125 explicitly doesn't define an algorithm for this
+    (section 1.7.2 - "Out of Scope").
+    """
+    # OpenSSL may add a trailing newline to a subjectAltName's IP address
+    # Divergence from upstream: ipaddress can't handle byte str
+    ip = ipaddress.ip_address(_to_unicode(ipname).rstrip())
+    return ip == host_ip
+
+
+def match_hostname(cert, hostname):
+    """Verify that *cert* (in decoded format as returned by
+    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+    rules are followed, but IP addresses are not accepted for *hostname*.
+
+    CertificateError is raised on failure. On success, the function
+    returns nothing.
+    """
+    if not cert:
+        raise ValueError("empty or no certificate, match_hostname needs a "
+                         "SSL socket or SSL context with either "
+                         "CERT_OPTIONAL or CERT_REQUIRED")
+    try:
+        # Divergence from upstream: ipaddress can't handle byte str
+        host_ip = ipaddress.ip_address(_to_unicode(hostname))
+    except ValueError:
+        # Not an IP address (common case)
+        host_ip = None
+    except UnicodeError:
+        # Divergence from upstream: Have to deal with ipaddress not taking
+        # byte strings.  addresses should be all ascii, so we consider it not
+        # an ipaddress in this case
+        host_ip = None
+    except AttributeError:
+        # Divergence from upstream: Make ipaddress library optional
+        if ipaddress is None:
+            host_ip = None
+        else:
+            raise
+    dnsnames = []
+    san = cert.get('subjectAltName', ())
+    for key, value in san:
+        if key == 'DNS':
+            if host_ip is None and _dnsname_match(value, hostname):
+                return
+            dnsnames.append(value)
+        elif key == 'IP Address':
+            if host_ip is not None and _ipaddress_match(value, host_ip):
+                return
+            dnsnames.append(value)
+    if not dnsnames:
+        # The subject is only checked when there is no dNSName entry
+        # in subjectAltName
+        for sub in cert.get('subject', ()):
+            for key, value in sub:
+                # XXX according to RFC 2818, the most specific Common Name
+                # must be used.
+                if key == 'commonName':
+                    if _dnsname_match(value, hostname):
+                        return
+                    dnsnames.append(value)
+    if len(dnsnames) > 1:
+        raise CertificateError("hostname %r "
+            "doesn't match either of %s"
+            % (hostname, ', '.join(map(repr, dnsnames))))
+    elif len(dnsnames) == 1:
+        raise CertificateError("hostname %r "
+            "doesn't match %r"
+            % (hostname, dnsnames[0]))
+    else:
+        raise CertificateError("no appropriate commonName or "
+            "subjectAltName fields were found")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/poolmanager.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/poolmanager.py
new file mode 100644
index 00000000..a6ade6e9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/poolmanager.py
@@ -0,0 +1,455 @@
+from __future__ import absolute_import
+import collections
+import functools
+import logging
+
+from ._collections import RecentlyUsedContainer
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
+from .connectionpool import port_by_scheme
+from .exceptions import LocationValueError, MaxRetryError, ProxySchemeUnknown
+from .packages import six
+from .packages.six.moves.urllib.parse import urljoin
+from .request import RequestMethods
+from .util.url import parse_url
+from .util.retry import Retry
+
+
+__all__ = ['PoolManager', 'ProxyManager', 'proxy_from_url']
+
+
+log = logging.getLogger(__name__)
+
+SSL_KEYWORDS = ('key_file', 'cert_file', 'cert_reqs', 'ca_certs',
+                'ssl_version', 'ca_cert_dir', 'ssl_context',
+                'key_password')
+
+# All known keyword arguments that could be provided to the pool manager, its
+# pools, or the underlying connections. This is used to construct a pool key.
+_key_fields = (
+    'key_scheme',  # str
+    'key_host',  # str
+    'key_port',  # int
+    'key_timeout',  # int or float or Timeout
+    'key_retries',  # int or Retry
+    'key_strict',  # bool
+    'key_block',  # bool
+    'key_source_address',  # str
+    'key_key_file',  # str
+    'key_key_password',  # str
+    'key_cert_file',  # str
+    'key_cert_reqs',  # str
+    'key_ca_certs',  # str
+    'key_ssl_version',  # str
+    'key_ca_cert_dir',  # str
+    'key_ssl_context',  # instance of ssl.SSLContext or urllib3.util.ssl_.SSLContext
+    'key_maxsize',  # int
+    'key_headers',  # dict
+    'key__proxy',  # parsed proxy url
+    'key__proxy_headers',  # dict
+    'key_socket_options',  # list of (level (int), optname (int), value (int or str)) tuples
+    'key__socks_options',  # dict
+    'key_assert_hostname',  # bool or string
+    'key_assert_fingerprint',  # str
+    'key_server_hostname',  # str
+)
+
+#: The namedtuple class used to construct keys for the connection pool.
+#: All custom key schemes should include the fields in this key at a minimum.
+PoolKey = collections.namedtuple('PoolKey', _key_fields)
+
+
+def _default_key_normalizer(key_class, request_context):
+    """
+    Create a pool key out of a request context dictionary.
+
+    According to RFC 3986, both the scheme and host are case-insensitive.
+    Therefore, this function normalizes both before constructing the pool
+    key for an HTTPS request. If you wish to change this behaviour, provide
+    alternate callables to ``key_fn_by_scheme``.
+
+    :param key_class:
+        The class to use when constructing the key. This should be a namedtuple
+        with the ``scheme`` and ``host`` keys at a minimum.
+    :type  key_class: namedtuple
+    :param request_context:
+        A dictionary-like object that contain the context for a request.
+    :type  request_context: dict
+
+    :return: A namedtuple that can be used as a connection pool key.
+    :rtype:  PoolKey
+    """
+    # Since we mutate the dictionary, make a copy first
+    context = request_context.copy()
+    context['scheme'] = context['scheme'].lower()
+    context['host'] = context['host'].lower()
+
+    # These are both dictionaries and need to be transformed into frozensets
+    for key in ('headers', '_proxy_headers', '_socks_options'):
+        if key in context and context[key] is not None:
+            context[key] = frozenset(context[key].items())
+
+    # The socket_options key may be a list and needs to be transformed into a
+    # tuple.
+    socket_opts = context.get('socket_options')
+    if socket_opts is not None:
+        context['socket_options'] = tuple(socket_opts)
+
+    # Map the kwargs to the names in the namedtuple - this is necessary since
+    # namedtuples can't have fields starting with '_'.
+    for key in list(context.keys()):
+        context['key_' + key] = context.pop(key)
+
+    # Default to ``None`` for keys missing from the context
+    for field in key_class._fields:
+        if field not in context:
+            context[field] = None
+
+    return key_class(**context)
+
+
+#: A dictionary that maps a scheme to a callable that creates a pool key.
+#: This can be used to alter the way pool keys are constructed, if desired.
+#: Each PoolManager makes a copy of this dictionary so they can be configured
+#: globally here, or individually on the instance.
+key_fn_by_scheme = {
+    'http': functools.partial(_default_key_normalizer, PoolKey),
+    'https': functools.partial(_default_key_normalizer, PoolKey),
+}
+
+pool_classes_by_scheme = {
+    'http': HTTPConnectionPool,
+    'https': HTTPSConnectionPool,
+}
+
+
+class PoolManager(RequestMethods):
+    """
+    Allows for arbitrary requests while transparently keeping track of
+    necessary connection pools for you.
+
+    :param num_pools:
+        Number of connection pools to cache before discarding the least
+        recently used pool.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param \\**connection_pool_kw:
+        Additional parameters are used to create fresh
+        :class:`urllib3.connectionpool.ConnectionPool` instances.
+
+    Example::
+
+        >>> manager = PoolManager(num_pools=2)
+        >>> r = manager.request('GET', 'http://google.com/')
+        >>> r = manager.request('GET', 'http://google.com/mail')
+        >>> r = manager.request('GET', 'http://yahoo.com/')
+        >>> len(manager.pools)
+        2
+
+    """
+
+    proxy = None
+
+    def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
+        RequestMethods.__init__(self, headers)
+        self.connection_pool_kw = connection_pool_kw
+        self.pools = RecentlyUsedContainer(num_pools,
+                                           dispose_func=lambda p: p.close())
+
+        # Locally set the pool classes and keys so other PoolManagers can
+        # override them.
+        self.pool_classes_by_scheme = pool_classes_by_scheme
+        self.key_fn_by_scheme = key_fn_by_scheme.copy()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.clear()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def _new_pool(self, scheme, host, port, request_context=None):
+        """
+        Create a new :class:`ConnectionPool` based on host, port, scheme, and
+        any additional pool keyword arguments.
+
+        If ``request_context`` is provided, it is provided as keyword arguments
+        to the pool class used. This method is used to actually create the
+        connection pools handed out by :meth:`connection_from_url` and
+        companion methods. It is intended to be overridden for customization.
+        """
+        pool_cls = self.pool_classes_by_scheme[scheme]
+        if request_context is None:
+            request_context = self.connection_pool_kw.copy()
+
+        # Although the context has everything necessary to create the pool,
+        # this function has historically only used the scheme, host, and port
+        # in the positional args. When an API change is acceptable these can
+        # be removed.
+        for key in ('scheme', 'host', 'port'):
+            request_context.pop(key, None)
+
+        if scheme == 'http':
+            for kw in SSL_KEYWORDS:
+                request_context.pop(kw, None)
+
+        return pool_cls(host, port, **request_context)
+
+    def clear(self):
+        """
+        Empty our store of pools and direct them all to close.
+
+        This will not affect in-flight connections, but they will not be
+        re-used after completion.
+        """
+        self.pools.clear()
+
+    def connection_from_host(self, host, port=None, scheme='http', pool_kwargs=None):
+        """
+        Get a :class:`ConnectionPool` based on the host, port, and scheme.
+
+        If ``port`` isn't given, it will be derived from the ``scheme`` using
+        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
+        provided, it is merged with the instance's ``connection_pool_kw``
+        variable and used to create the new connection pool, if one is
+        needed.
+        """
+
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        request_context = self._merge_pool_kwargs(pool_kwargs)
+        request_context['scheme'] = scheme or 'http'
+        if not port:
+            port = port_by_scheme.get(request_context['scheme'].lower(), 80)
+        request_context['port'] = port
+        request_context['host'] = host
+
+        return self.connection_from_context(request_context)
+
+    def connection_from_context(self, request_context):
+        """
+        Get a :class:`ConnectionPool` based on the request context.
+
+        ``request_context`` must at least contain the ``scheme`` key and its
+        value must be a key in ``key_fn_by_scheme`` instance variable.
+        """
+        scheme = request_context['scheme'].lower()
+        pool_key_constructor = self.key_fn_by_scheme[scheme]
+        pool_key = pool_key_constructor(request_context)
+
+        return self.connection_from_pool_key(pool_key, request_context=request_context)
+
+    def connection_from_pool_key(self, pool_key, request_context=None):
+        """
+        Get a :class:`ConnectionPool` based on the provided pool key.
+
+        ``pool_key`` should be a namedtuple that only contains immutable
+        objects. At a minimum it must have the ``scheme``, ``host``, and
+        ``port`` fields.
+        """
+        with self.pools.lock:
+            # If the scheme, host, or port doesn't match existing open
+            # connections, open a new ConnectionPool.
+            pool = self.pools.get(pool_key)
+            if pool:
+                return pool
+
+            # Make a fresh ConnectionPool of the desired type
+            scheme = request_context['scheme']
+            host = request_context['host']
+            port = request_context['port']
+            pool = self._new_pool(scheme, host, port, request_context=request_context)
+            self.pools[pool_key] = pool
+
+        return pool
+
+    def connection_from_url(self, url, pool_kwargs=None):
+        """
+        Similar to :func:`urllib3.connectionpool.connection_from_url`.
+
+        If ``pool_kwargs`` is not provided and a new pool needs to be
+        constructed, ``self.connection_pool_kw`` is used to initialize
+        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
+        is provided, it is used instead. Note that if a new pool does not
+        need to be created for the request, the provided ``pool_kwargs`` are
+        not used.
+        """
+        u = parse_url(url)
+        return self.connection_from_host(u.host, port=u.port, scheme=u.scheme,
+                                         pool_kwargs=pool_kwargs)
+
+    def _merge_pool_kwargs(self, override):
+        """
+        Merge a dictionary of override values for self.connection_pool_kw.
+
+        This does not modify self.connection_pool_kw and returns a new dict.
+        Any keys in the override dictionary with a value of ``None`` are
+        removed from the merged dictionary.
+        """
+        base_pool_kwargs = self.connection_pool_kw.copy()
+        if override:
+            for key, value in override.items():
+                if value is None:
+                    try:
+                        del base_pool_kwargs[key]
+                    except KeyError:
+                        pass
+                else:
+                    base_pool_kwargs[key] = value
+        return base_pool_kwargs
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        """
+        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
+        with custom cross-host redirect logic and only sends the request-uri
+        portion of the ``url``.
+
+        The given ``url`` parameter must be absolute, such that an appropriate
+        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
+        """
+        u = parse_url(url)
+        conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
+
+        kw['assert_same_host'] = False
+        kw['redirect'] = False
+
+        if 'headers' not in kw:
+            kw['headers'] = self.headers.copy()
+
+        if self.proxy is not None and u.scheme == "http":
+            response = conn.urlopen(method, url, **kw)
+        else:
+            response = conn.urlopen(method, u.request_uri, **kw)
+
+        redirect_location = redirect and response.get_redirect_location()
+        if not redirect_location:
+            return response
+
+        # Support relative URLs for redirecting.
+        redirect_location = urljoin(url, redirect_location)
+
+        # RFC 7231, Section 6.4.4
+        if response.status == 303:
+            method = 'GET'
+
+        retries = kw.get('retries')
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect)
+
+        # Strip headers marked as unsafe to forward to the redirected location.
+        # Check remove_headers_on_redirect to avoid a potential network call within
+        # conn.is_same_host() which may use socket.gethostbyname() in the future.
+        if (retries.remove_headers_on_redirect
+                and not conn.is_same_host(redirect_location)):
+            headers = list(six.iterkeys(kw['headers']))
+            for header in headers:
+                if header.lower() in retries.remove_headers_on_redirect:
+                    kw['headers'].pop(header, None)
+
+        try:
+            retries = retries.increment(method, url, response=response, _pool=conn)
+        except MaxRetryError:
+            if retries.raise_on_redirect:
+                raise
+            return response
+
+        kw['retries'] = retries
+        kw['redirect'] = redirect
+
+        log.info("Redirecting %s -> %s", url, redirect_location)
+        return self.urlopen(method, redirect_location, **kw)
+
+
+class ProxyManager(PoolManager):
+    """
+    Behaves just like :class:`PoolManager`, but sends all requests through
+    the defined proxy, using the CONNECT method for HTTPS URLs.
+
+    :param proxy_url:
+        The URL of the proxy to be used.
+
+    :param proxy_headers:
+        A dictionary containing headers that will be sent to the proxy. In case
+        of HTTP they are being sent with each request, while in the
+        HTTPS/CONNECT case they are sent only once. Could be used for proxy
+        authentication.
+
+    Example:
+        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
+        >>> r1 = proxy.request('GET', 'http://google.com/')
+        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
+        >>> len(proxy.pools)
+        1
+        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
+        >>> r4 = proxy.request('GET', 'https://twitter.com/')
+        >>> len(proxy.pools)
+        3
+
+    """
+
+    def __init__(self, proxy_url, num_pools=10, headers=None,
+                 proxy_headers=None, **connection_pool_kw):
+
+        if isinstance(proxy_url, HTTPConnectionPool):
+            proxy_url = '%s://%s:%i' % (proxy_url.scheme, proxy_url.host,
+                                        proxy_url.port)
+        proxy = parse_url(proxy_url)
+        if not proxy.port:
+            port = port_by_scheme.get(proxy.scheme, 80)
+            proxy = proxy._replace(port=port)
+
+        if proxy.scheme not in ("http", "https"):
+            raise ProxySchemeUnknown(proxy.scheme)
+
+        self.proxy = proxy
+        self.proxy_headers = proxy_headers or {}
+
+        connection_pool_kw['_proxy'] = self.proxy
+        connection_pool_kw['_proxy_headers'] = self.proxy_headers
+
+        super(ProxyManager, self).__init__(
+            num_pools, headers, **connection_pool_kw)
+
+    def connection_from_host(self, host, port=None, scheme='http', pool_kwargs=None):
+        if scheme == "https":
+            return super(ProxyManager, self).connection_from_host(
+                host, port, scheme, pool_kwargs=pool_kwargs)
+
+        return super(ProxyManager, self).connection_from_host(
+            self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs)
+
+    def _set_proxy_headers(self, url, headers=None):
+        """
+        Sets headers needed by proxies: specifically, the Accept and Host
+        headers. Only sets headers not provided by the user.
+        """
+        headers_ = {'Accept': '*/*'}
+
+        netloc = parse_url(url).netloc
+        if netloc:
+            headers_['Host'] = netloc
+
+        if headers:
+            headers_.update(headers)
+        return headers_
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
+        u = parse_url(url)
+
+        if u.scheme == "http":
+            # For proxied HTTPS requests, httplib sets the necessary headers
+            # on the CONNECT to the proxy. For HTTP, we'll definitely
+            # need to set 'Host' at the very least.
+            headers = kw.get('headers', self.headers)
+            kw['headers'] = self._set_proxy_headers(url, headers)
+
+        return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
+
+
+def proxy_from_url(url, **kw):
+    return ProxyManager(proxy_url=url, **kw)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/request.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/request.py
new file mode 100644
index 00000000..8f2f44bb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/request.py
@@ -0,0 +1,150 @@
+from __future__ import absolute_import
+
+from .filepost import encode_multipart_formdata
+from .packages.six.moves.urllib.parse import urlencode
+
+
+__all__ = ['RequestMethods']
+
+
+class RequestMethods(object):
+    """
+    Convenience mixin for classes who implement a :meth:`urlopen` method, such
+    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
+    :class:`~urllib3.poolmanager.PoolManager`.
+
+    Provides behavior for making common types of HTTP request methods and
+    decides which type of request field encoding to use.
+
+    Specifically,
+
+    :meth:`.request_encode_url` is for sending requests whose fields are
+    encoded in the URL (such as GET, HEAD, DELETE).
+
+    :meth:`.request_encode_body` is for sending requests whose fields are
+    encoded in the *body* of the request using multipart or www-form-urlencoded
+    (such as for POST, PUT, PATCH).
+
+    :meth:`.request` is for making any kind of request, it will look up the
+    appropriate encoding format and use one of the above two methods to make
+    the request.
+
+    Initializer parameters:
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+    """
+
+    _encode_url_methods = {'DELETE', 'GET', 'HEAD', 'OPTIONS'}
+
+    def __init__(self, headers=None):
+        self.headers = headers or {}
+
+    def urlopen(self, method, url, body=None, headers=None,
+                encode_multipart=True, multipart_boundary=None,
+                **kw):  # Abstract
+        raise NotImplementedError("Classes extending RequestMethods must implement "
+                                  "their own ``urlopen`` method.")
+
+    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the appropriate encoding of
+        ``fields`` based on the ``method`` used.
+
+        This is a convenience method that requires the least amount of manual
+        effort. It can be used in most situations, while still having the
+        option to drop down to more specific methods when necessary, such as
+        :meth:`request_encode_url`, :meth:`request_encode_body`,
+        or even the lowest level :meth:`urlopen`.
+        """
+        method = method.upper()
+
+        urlopen_kw['request_url'] = url
+
+        if method in self._encode_url_methods:
+            return self.request_encode_url(method, url, fields=fields,
+                                           headers=headers,
+                                           **urlopen_kw)
+        else:
+            return self.request_encode_body(method, url, fields=fields,
+                                            headers=headers,
+                                            **urlopen_kw)
+
+    def request_encode_url(self, method, url, fields=None, headers=None,
+                           **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {'headers': headers}
+        extra_kw.update(urlopen_kw)
+
+        if fields:
+            url += '?' + urlencode(fields)
+
+        return self.urlopen(method, url, **extra_kw)
+
+    def request_encode_body(self, method, url, fields=None, headers=None,
+                            encode_multipart=True, multipart_boundary=None,
+                            **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the body. This is useful for request methods like POST, PUT, PATCH, etc.
+
+        When ``encode_multipart=True`` (default), then
+        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode
+        the payload with the appropriate content type. Otherwise
+        :meth:`urllib.urlencode` is used with the
+        'application/x-www-form-urlencoded' content type.
+
+        Multipart encoding must be used when posting files, and it's reasonably
+        safe to use it in other times too. However, it may break request
+        signing, such as with OAuth.
+
+        Supports an optional ``fields`` parameter of key/value strings AND
+        key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
+        the MIME type is optional. For example::
+
+            fields = {
+                'foo': 'bar',
+                'fakefile': ('foofile.txt', 'contents of foofile'),
+                'realfile': ('barfile.txt', open('realfile').read()),
+                'typedfile': ('bazfile.bin', open('bazfile').read(),
+                              'image/jpeg'),
+                'nonamefile': 'contents of nonamefile field',
+            }
+
+        When uploading a file, providing a filename (the first parameter of the
+        tuple) is optional but recommended to best mimic behavior of browsers.
+
+        Note that if ``headers`` are supplied, the 'Content-Type' header will
+        be overwritten because it depends on the dynamic random boundary string
+        which is used to compose the body of the request. The random boundary
+        string can be explicitly set with the ``multipart_boundary`` parameter.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {'headers': {}}
+
+        if fields:
+            if 'body' in urlopen_kw:
+                raise TypeError(
+                    "request got values for both 'fields' and 'body', can only specify one.")
+
+            if encode_multipart:
+                body, content_type = encode_multipart_formdata(fields, boundary=multipart_boundary)
+            else:
+                body, content_type = urlencode(fields), 'application/x-www-form-urlencoded'
+
+            extra_kw['body'] = body
+            extra_kw['headers'] = {'Content-Type': content_type}
+
+        extra_kw['headers'].update(headers)
+        extra_kw.update(urlopen_kw)
+
+        return self.urlopen(method, url, **extra_kw)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/response.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/response.py
new file mode 100644
index 00000000..4f857932
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/response.py
@@ -0,0 +1,760 @@
+from __future__ import absolute_import
+from contextlib import contextmanager
+import zlib
+import io
+import logging
+from socket import timeout as SocketTimeout
+from socket import error as SocketError
+
+try:
+    import brotli
+except ImportError:
+    brotli = None
+
+from ._collections import HTTPHeaderDict
+from .exceptions import (
+    BodyNotHttplibCompatible, ProtocolError, DecodeError, ReadTimeoutError,
+    ResponseNotChunked, IncompleteRead, InvalidHeader
+)
+from .packages.six import string_types as basestring, PY3
+from .packages.six.moves import http_client as httplib
+from .connection import HTTPException, BaseSSLError
+from .util.response import is_fp_closed, is_response_to_head
+
+log = logging.getLogger(__name__)
+
+
+class DeflateDecoder(object):
+
+    def __init__(self):
+        self._first_try = True
+        self._data = b''
+        self._obj = zlib.decompressobj()
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        if not data:
+            return data
+
+        if not self._first_try:
+            return self._obj.decompress(data)
+
+        self._data += data
+        try:
+            decompressed = self._obj.decompress(data)
+            if decompressed:
+                self._first_try = False
+                self._data = None
+            return decompressed
+        except zlib.error:
+            self._first_try = False
+            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
+            try:
+                return self.decompress(self._data)
+            finally:
+                self._data = None
+
+
+class GzipDecoderState(object):
+
+    FIRST_MEMBER = 0
+    OTHER_MEMBERS = 1
+    SWALLOW_DATA = 2
+
+
+class GzipDecoder(object):
+
+    def __init__(self):
+        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+        self._state = GzipDecoderState.FIRST_MEMBER
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        ret = bytearray()
+        if self._state == GzipDecoderState.SWALLOW_DATA or not data:
+            return bytes(ret)
+        while True:
+            try:
+                ret += self._obj.decompress(data)
+            except zlib.error:
+                previous_state = self._state
+                # Ignore data after the first error
+                self._state = GzipDecoderState.SWALLOW_DATA
+                if previous_state == GzipDecoderState.OTHER_MEMBERS:
+                    # Allow trailing garbage acceptable in other gzip clients
+                    return bytes(ret)
+                raise
+            data = self._obj.unused_data
+            if not data:
+                return bytes(ret)
+            self._state = GzipDecoderState.OTHER_MEMBERS
+            self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+
+
+if brotli is not None:
+    class BrotliDecoder(object):
+        # Supports both 'brotlipy' and 'Brotli' packages
+        # since they share an import name. The top branches
+        # are for 'brotlipy' and bottom branches for 'Brotli'
+        def __init__(self):
+            self._obj = brotli.Decompressor()
+
+        def decompress(self, data):
+            if hasattr(self._obj, 'decompress'):
+                return self._obj.decompress(data)
+            return self._obj.process(data)
+
+        def flush(self):
+            if hasattr(self._obj, 'flush'):
+                return self._obj.flush()
+            return b''
+
+
+class MultiDecoder(object):
+    """
+    From RFC7231:
+        If one or more encodings have been applied to a representation, the
+        sender that applied the encodings MUST generate a Content-Encoding
+        header field that lists the content codings in the order in which
+        they were applied.
+    """
+
+    def __init__(self, modes):
+        self._decoders = [_get_decoder(m.strip()) for m in modes.split(',')]
+
+    def flush(self):
+        return self._decoders[0].flush()
+
+    def decompress(self, data):
+        for d in reversed(self._decoders):
+            data = d.decompress(data)
+        return data
+
+
+def _get_decoder(mode):
+    if ',' in mode:
+        return MultiDecoder(mode)
+
+    if mode == 'gzip':
+        return GzipDecoder()
+
+    if brotli is not None and mode == 'br':
+        return BrotliDecoder()
+
+    return DeflateDecoder()
+
+
+class HTTPResponse(io.IOBase):
+    """
+    HTTP Response container.
+
+    Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
+    loaded and decoded on-demand when the ``data`` property is accessed.  This
+    class is also compatible with the Python standard library's :mod:`io`
+    module, and can hence be treated as a readable object in the context of that
+    framework.
+
+    Extra parameters for behaviour not present in httplib.HTTPResponse:
+
+    :param preload_content:
+        If True, the response's body will be preloaded during construction.
+
+    :param decode_content:
+        If True, will attempt to decode the body based on the
+        'content-encoding' header.
+
+    :param original_response:
+        When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
+        object, it's convenient to include the original for debug purposes. It's
+        otherwise unused.
+
+    :param retries:
+        The retries contains the last :class:`~urllib3.util.retry.Retry` that
+        was used during the request.
+
+    :param enforce_content_length:
+        Enforce content length checking. Body returned by server must match
+        value of Content-Length header, if present. Otherwise, raise error.
+    """
+
+    CONTENT_DECODERS = ['gzip', 'deflate']
+    if brotli is not None:
+        CONTENT_DECODERS += ['br']
+    REDIRECT_STATUSES = [301, 302, 303, 307, 308]
+
+    def __init__(self, body='', headers=None, status=0, version=0, reason=None,
+                 strict=0, preload_content=True, decode_content=True,
+                 original_response=None, pool=None, connection=None, msg=None,
+                 retries=None, enforce_content_length=False,
+                 request_method=None, request_url=None):
+
+        if isinstance(headers, HTTPHeaderDict):
+            self.headers = headers
+        else:
+            self.headers = HTTPHeaderDict(headers)
+        self.status = status
+        self.version = version
+        self.reason = reason
+        self.strict = strict
+        self.decode_content = decode_content
+        self.retries = retries
+        self.enforce_content_length = enforce_content_length
+
+        self._decoder = None
+        self._body = None
+        self._fp = None
+        self._original_response = original_response
+        self._fp_bytes_read = 0
+        self.msg = msg
+        self._request_url = request_url
+
+        if body and isinstance(body, (basestring, bytes)):
+            self._body = body
+
+        self._pool = pool
+        self._connection = connection
+
+        if hasattr(body, 'read'):
+            self._fp = body
+
+        # Are we using the chunked-style of transfer encoding?
+        self.chunked = False
+        self.chunk_left = None
+        tr_enc = self.headers.get('transfer-encoding', '').lower()
+        # Don't incur the penalty of creating a list and then discarding it
+        encodings = (enc.strip() for enc in tr_enc.split(","))
+        if "chunked" in encodings:
+            self.chunked = True
+
+        # Determine length of response
+        self.length_remaining = self._init_length(request_method)
+
+        # If requested, preload the body.
+        if preload_content and not self._body:
+            self._body = self.read(decode_content=decode_content)
+
+    def get_redirect_location(self):
+        """
+        Should we redirect and where to?
+
+        :returns: Truthy redirect location string if we got a redirect status
+            code and valid location. ``None`` if redirect status and no
+            location. ``False`` if not a redirect status code.
+        """
+        if self.status in self.REDIRECT_STATUSES:
+            return self.headers.get('location')
+
+        return False
+
+    def release_conn(self):
+        if not self._pool or not self._connection:
+            return
+
+        self._pool._put_conn(self._connection)
+        self._connection = None
+
+    @property
+    def data(self):
+        # For backwords-compat with earlier urllib3 0.4 and earlier.
+        if self._body:
+            return self._body
+
+        if self._fp:
+            return self.read(cache_content=True)
+
+    @property
+    def connection(self):
+        return self._connection
+
+    def isclosed(self):
+        return is_fp_closed(self._fp)
+
+    def tell(self):
+        """
+        Obtain the number of bytes pulled over the wire so far. May differ from
+        the amount of content returned by :meth:``HTTPResponse.read`` if bytes
+        are encoded on the wire (e.g, compressed).
+        """
+        return self._fp_bytes_read
+
+    def _init_length(self, request_method):
+        """
+        Set initial length value for Response content if available.
+        """
+        length = self.headers.get('content-length')
+
+        if length is not None:
+            if self.chunked:
+                # This Response will fail with an IncompleteRead if it can't be
+                # received as chunked. This method falls back to attempt reading
+                # the response before raising an exception.
+                log.warning("Received response with both Content-Length and "
+                            "Transfer-Encoding set. This is expressly forbidden "
+                            "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
+                            "attempting to process response as Transfer-Encoding: "
+                            "chunked.")
+                return None
+
+            try:
+                # RFC 7230 section 3.3.2 specifies multiple content lengths can
+                # be sent in a single Content-Length header
+                # (e.g. Content-Length: 42, 42). This line ensures the values
+                # are all valid ints and that as long as the `set` length is 1,
+                # all values are the same. Otherwise, the header is invalid.
+                lengths = set([int(val) for val in length.split(',')])
+                if len(lengths) > 1:
+                    raise InvalidHeader("Content-Length contained multiple "
+                                        "unmatching values (%s)" % length)
+                length = lengths.pop()
+            except ValueError:
+                length = None
+            else:
+                if length < 0:
+                    length = None
+
+        # Convert status to int for comparison
+        # In some cases, httplib returns a status of "_UNKNOWN"
+        try:
+            status = int(self.status)
+        except ValueError:
+            status = 0
+
+        # Check for responses that shouldn't include a body
+        if status in (204, 304) or 100 <= status < 200 or request_method == 'HEAD':
+            length = 0
+
+        return length
+
+    def _init_decoder(self):
+        """
+        Set-up the _decoder attribute if necessary.
+        """
+        # Note: content-encoding value should be case-insensitive, per RFC 7230
+        # Section 3.2
+        content_encoding = self.headers.get('content-encoding', '').lower()
+        if self._decoder is None:
+            if content_encoding in self.CONTENT_DECODERS:
+                self._decoder = _get_decoder(content_encoding)
+            elif ',' in content_encoding:
+                encodings = [
+                    e.strip() for e in content_encoding.split(',')
+                    if e.strip() in self.CONTENT_DECODERS]
+                if len(encodings):
+                    self._decoder = _get_decoder(content_encoding)
+
+    DECODER_ERROR_CLASSES = (IOError, zlib.error)
+    if brotli is not None:
+        DECODER_ERROR_CLASSES += (brotli.error,)
+
+    def _decode(self, data, decode_content, flush_decoder):
+        """
+        Decode the data passed in and potentially flush the decoder.
+        """
+        if not decode_content:
+            return data
+
+        try:
+            if self._decoder:
+                data = self._decoder.decompress(data)
+        except self.DECODER_ERROR_CLASSES as e:
+            content_encoding = self.headers.get('content-encoding', '').lower()
+            raise DecodeError(
+                "Received response with content-encoding: %s, but "
+                "failed to decode it." % content_encoding, e)
+        if flush_decoder:
+            data += self._flush_decoder()
+
+        return data
+
+    def _flush_decoder(self):
+        """
+        Flushes the decoder. Should only be called if the decoder is actually
+        being used.
+        """
+        if self._decoder:
+            buf = self._decoder.decompress(b'')
+            return buf + self._decoder.flush()
+
+        return b''
+
+    @contextmanager
+    def _error_catcher(self):
+        """
+        Catch low-level python exceptions, instead re-raising urllib3
+        variants, so that low-level exceptions are not leaked in the
+        high-level api.
+
+        On exit, release the connection back to the pool.
+        """
+        clean_exit = False
+
+        try:
+            try:
+                yield
+
+            except SocketTimeout:
+                # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
+                # there is yet no clean way to get at it from this context.
+                raise ReadTimeoutError(self._pool, None, 'Read timed out.')
+
+            except BaseSSLError as e:
+                # FIXME: Is there a better way to differentiate between SSLErrors?
+                if 'read operation timed out' not in str(e):  # Defensive:
+                    # This shouldn't happen but just in case we're missing an edge
+                    # case, let's avoid swallowing SSL errors.
+                    raise
+
+                raise ReadTimeoutError(self._pool, None, 'Read timed out.')
+
+            except (HTTPException, SocketError) as e:
+                # This includes IncompleteRead.
+                raise ProtocolError('Connection broken: %r' % e, e)
+
+            # If no exception is thrown, we should avoid cleaning up
+            # unnecessarily.
+            clean_exit = True
+        finally:
+            # If we didn't terminate cleanly, we need to throw away our
+            # connection.
+            if not clean_exit:
+                # The response may not be closed but we're not going to use it
+                # anymore so close it now to ensure that the connection is
+                # released back to the pool.
+                if self._original_response:
+                    self._original_response.close()
+
+                # Closing the response may not actually be sufficient to close
+                # everything, so if we have a hold of the connection close that
+                # too.
+                if self._connection:
+                    self._connection.close()
+
+            # If we hold the original response but it's closed now, we should
+            # return the connection back to the pool.
+            if self._original_response and self._original_response.isclosed():
+                self.release_conn()
+
+    def read(self, amt=None, decode_content=None, cache_content=False):
+        """
+        Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
+        parameters: ``decode_content`` and ``cache_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+
+        :param cache_content:
+            If True, will save the returned data such that the same result is
+            returned despite of the state of the underlying file object. This
+            is useful if you want the ``.data`` property to continue working
+            after having ``.read()`` the file object. (Overridden if ``amt`` is
+            set.)
+        """
+        self._init_decoder()
+        if decode_content is None:
+            decode_content = self.decode_content
+
+        if self._fp is None:
+            return
+
+        flush_decoder = False
+        data = None
+
+        with self._error_catcher():
+            if amt is None:
+                # cStringIO doesn't like amt=None
+                data = self._fp.read()
+                flush_decoder = True
+            else:
+                cache_content = False
+                data = self._fp.read(amt)
+                if amt != 0 and not data:  # Platform-specific: Buggy versions of Python.
+                    # Close the connection when no data is returned
+                    #
+                    # This is redundant to what httplib/http.client _should_
+                    # already do.  However, versions of python released before
+                    # December 15, 2012 (http://bugs.python.org/issue16298) do
+                    # not properly close the connection in all cases. There is
+                    # no harm in redundantly calling close.
+                    self._fp.close()
+                    flush_decoder = True
+                    if self.enforce_content_length and self.length_remaining not in (0, None):
+                        # This is an edge case that httplib failed to cover due
+                        # to concerns of backward compatibility. We're
+                        # addressing it here to make sure IncompleteRead is
+                        # raised during streaming, so all calls with incorrect
+                        # Content-Length are caught.
+                        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
+
+        if data:
+            self._fp_bytes_read += len(data)
+            if self.length_remaining is not None:
+                self.length_remaining -= len(data)
+
+            data = self._decode(data, decode_content, flush_decoder)
+
+            if cache_content:
+                self._body = data
+
+        return data
+
+    def stream(self, amt=2**16, decode_content=None):
+        """
+        A generator wrapper for the read() method. A call will block until
+        ``amt`` bytes have been read from the connection or until the
+        connection is closed.
+
+        :param amt:
+            How much of the content to read. The generator will return up to
+            much data per iteration, but may return less. This is particularly
+            likely when using compressed data. However, the empty string will
+            never be returned.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        if self.chunked and self.supports_chunked_reads():
+            for line in self.read_chunked(amt, decode_content=decode_content):
+                yield line
+        else:
+            while not is_fp_closed(self._fp):
+                data = self.read(amt=amt, decode_content=decode_content)
+
+                if data:
+                    yield data
+
+    @classmethod
+    def from_httplib(ResponseCls, r, **response_kw):
+        """
+        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
+        corresponding :class:`urllib3.response.HTTPResponse` object.
+
+        Remaining parameters are passed to the HTTPResponse constructor, along
+        with ``original_response=r``.
+        """
+        headers = r.msg
+
+        if not isinstance(headers, HTTPHeaderDict):
+            if PY3:
+                headers = HTTPHeaderDict(headers.items())
+            else:
+                # Python 2.7
+                headers = HTTPHeaderDict.from_httplib(headers)
+
+        # HTTPResponse objects in Python 3 don't have a .strict attribute
+        strict = getattr(r, 'strict', 0)
+        resp = ResponseCls(body=r,
+                           headers=headers,
+                           status=r.status,
+                           version=r.version,
+                           reason=r.reason,
+                           strict=strict,
+                           original_response=r,
+                           **response_kw)
+        return resp
+
+    # Backwards-compatibility methods for httplib.HTTPResponse
+    def getheaders(self):
+        return self.headers
+
+    def getheader(self, name, default=None):
+        return self.headers.get(name, default)
+
+    # Backwards compatibility for http.cookiejar
+    def info(self):
+        return self.headers
+
+    # Overrides from io.IOBase
+    def close(self):
+        if not self.closed:
+            self._fp.close()
+
+        if self._connection:
+            self._connection.close()
+
+    @property
+    def closed(self):
+        if self._fp is None:
+            return True
+        elif hasattr(self._fp, 'isclosed'):
+            return self._fp.isclosed()
+        elif hasattr(self._fp, 'closed'):
+            return self._fp.closed
+        else:
+            return True
+
+    def fileno(self):
+        if self._fp is None:
+            raise IOError("HTTPResponse has no file to get a fileno from")
+        elif hasattr(self._fp, "fileno"):
+            return self._fp.fileno()
+        else:
+            raise IOError("The file-like object this HTTPResponse is wrapped "
+                          "around has no file descriptor")
+
+    def flush(self):
+        if self._fp is not None and hasattr(self._fp, 'flush'):
+            return self._fp.flush()
+
+    def readable(self):
+        # This method is required for `io` module compatibility.
+        return True
+
+    def readinto(self, b):
+        # This method is required for `io` module compatibility.
+        temp = self.read(len(b))
+        if len(temp) == 0:
+            return 0
+        else:
+            b[:len(temp)] = temp
+            return len(temp)
+
+    def supports_chunked_reads(self):
+        """
+        Checks if the underlying file-like object looks like a
+        httplib.HTTPResponse object. We do this by testing for the fp
+        attribute. If it is present we assume it returns raw chunks as
+        processed by read_chunked().
+        """
+        return hasattr(self._fp, 'fp')
+
+    def _update_chunk_length(self):
+        # First, we'll figure out length of a chunk and then
+        # we'll try to read it from socket.
+        if self.chunk_left is not None:
+            return
+        line = self._fp.fp.readline()
+        line = line.split(b';', 1)[0]
+        try:
+            self.chunk_left = int(line, 16)
+        except ValueError:
+            # Invalid chunked protocol response, abort.
+            self.close()
+            raise httplib.IncompleteRead(line)
+
+    def _handle_chunk(self, amt):
+        returned_chunk = None
+        if amt is None:
+            chunk = self._fp._safe_read(self.chunk_left)
+            returned_chunk = chunk
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        elif amt < self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self.chunk_left = self.chunk_left - amt
+            returned_chunk = value
+        elif amt == self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+            returned_chunk = value
+        else:  # amt > self.chunk_left
+            returned_chunk = self._fp._safe_read(self.chunk_left)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        return returned_chunk
+
+    def read_chunked(self, amt=None, decode_content=None):
+        """
+        Similar to :meth:`HTTPResponse.read`, but with an additional
+        parameter: ``decode_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        self._init_decoder()
+        # FIXME: Rewrite this method and make it a class with a better structured logic.
+        if not self.chunked:
+            raise ResponseNotChunked(
+                "Response is not chunked. "
+                "Header 'transfer-encoding: chunked' is missing.")
+        if not self.supports_chunked_reads():
+            raise BodyNotHttplibCompatible(
+                "Body should be httplib.HTTPResponse like. "
+                "It should have have an fp attribute which returns raw chunks.")
+
+        with self._error_catcher():
+            # Don't bother reading the body of a HEAD request.
+            if self._original_response and is_response_to_head(self._original_response):
+                self._original_response.close()
+                return
+
+            # If a response is already read and closed
+            # then return immediately.
+            if self._fp.fp is None:
+                return
+
+            while True:
+                self._update_chunk_length()
+                if self.chunk_left == 0:
+                    break
+                chunk = self._handle_chunk(amt)
+                decoded = self._decode(chunk, decode_content=decode_content,
+                                       flush_decoder=False)
+                if decoded:
+                    yield decoded
+
+            if decode_content:
+                # On CPython and PyPy, we should never need to flush the
+                # decoder. However, on Jython we *might* need to, so
+                # lets defensively do it anyway.
+                decoded = self._flush_decoder()
+                if decoded:  # Platform-specific: Jython.
+                    yield decoded
+
+            # Chunk content ends with \r\n: discard it.
+            while True:
+                line = self._fp.fp.readline()
+                if not line:
+                    # Some sites may not end with '\r\n'.
+                    break
+                if line == b'\r\n':
+                    break
+
+            # We read everything; close the "file".
+            if self._original_response:
+                self._original_response.close()
+
+    def geturl(self):
+        """
+        Returns the URL that was the source of this response.
+        If the request that generated this response redirected, this method
+        will return the final redirect location.
+        """
+        if self.retries is not None and len(self.retries.history):
+            return self.retries.history[-1].redirect_location
+        else:
+            return self._request_url
+
+    def __iter__(self):
+        buffer = [b""]
+        for chunk in self.stream(decode_content=True):
+            if b"\n" in chunk:
+                chunk = chunk.split(b"\n")
+                yield b"".join(buffer) + chunk[0] + b"\n"
+                for x in chunk[1:-1]:
+                    yield x + b"\n"
+                if chunk[-1]:
+                    buffer = [chunk[-1]]
+                else:
+                    buffer = []
+            else:
+                buffer.append(chunk)
+        if buffer:
+            yield b"".join(buffer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__init__.py
new file mode 100644
index 00000000..2914bb46
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__init__.py
@@ -0,0 +1,56 @@
+from __future__ import absolute_import
+# For backwards compatibility, provide imports that used to be here.
+from .connection import is_connection_dropped
+from .request import make_headers
+from .response import is_fp_closed
+from .ssl_ import (
+    SSLContext,
+    HAS_SNI,
+    IS_PYOPENSSL,
+    IS_SECURETRANSPORT,
+    assert_fingerprint,
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    ssl_wrap_socket,
+    PROTOCOL_TLS,
+)
+from .timeout import (
+    current_time,
+    Timeout,
+)
+
+from .retry import Retry
+from .url import (
+    get_host,
+    parse_url,
+    split_first,
+    Url,
+)
+from .wait import (
+    wait_for_read,
+    wait_for_write
+)
+
+__all__ = (
+    'HAS_SNI',
+    'IS_PYOPENSSL',
+    'IS_SECURETRANSPORT',
+    'SSLContext',
+    'PROTOCOL_TLS',
+    'Retry',
+    'Timeout',
+    'Url',
+    'assert_fingerprint',
+    'current_time',
+    'is_connection_dropped',
+    'is_fp_closed',
+    'get_host',
+    'parse_url',
+    'make_headers',
+    'resolve_cert_reqs',
+    'resolve_ssl_version',
+    'split_first',
+    'ssl_wrap_socket',
+    'wait_for_read',
+    'wait_for_write'
+)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..514b361e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/connection.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/connection.cpython-37.pyc
new file mode 100644
index 00000000..8244ec96
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/connection.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/queue.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/queue.cpython-37.pyc
new file mode 100644
index 00000000..548ec88d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/queue.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/request.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/request.cpython-37.pyc
new file mode 100644
index 00000000..d062891a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/request.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/response.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/response.cpython-37.pyc
new file mode 100644
index 00000000..cd8cf970
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/response.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/retry.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/retry.cpython-37.pyc
new file mode 100644
index 00000000..64bd141e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/retry.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/ssl_.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/ssl_.cpython-37.pyc
new file mode 100644
index 00000000..1f7e7f5e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/ssl_.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/timeout.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/timeout.cpython-37.pyc
new file mode 100644
index 00000000..3af342ba
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/timeout.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/url.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/url.cpython-37.pyc
new file mode 100644
index 00000000..2bad415b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/url.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/wait.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/wait.cpython-37.pyc
new file mode 100644
index 00000000..c9f47e30
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/__pycache__/wait.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/connection.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/connection.py
new file mode 100644
index 00000000..5ad70b2f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/connection.py
@@ -0,0 +1,134 @@
+from __future__ import absolute_import
+import socket
+from .wait import NoWayToWaitForSocketError, wait_for_read
+from ..contrib import _appengine_environ
+
+
+def is_connection_dropped(conn):  # Platform-specific
+    """
+    Returns True if the connection is dropped and should be closed.
+
+    :param conn:
+        :class:`httplib.HTTPConnection` object.
+
+    Note: For platforms like AppEngine, this will always return ``False`` to
+    let the platform handle connection recycling transparently for us.
+    """
+    sock = getattr(conn, 'sock', False)
+    if sock is False:  # Platform-specific: AppEngine
+        return False
+    if sock is None:  # Connection already closed (such as by httplib).
+        return True
+    try:
+        # Returns True if readable, which here means it's been dropped
+        return wait_for_read(sock, timeout=0.0)
+    except NoWayToWaitForSocketError:  # Platform-specific: AppEngine
+        return False
+
+
+# This function is copied from socket.py in the Python 2.7 standard
+# library test suite. Added to its signature is only `socket_options`.
+# One additional modification is that we avoid binding to IPv6 servers
+# discovered in DNS if the system doesn't have IPv6 functionality.
+def create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+                      source_address=None, socket_options=None):
+    """Connect to *address* and return the socket object.
+
+    Convenience function.  Connect to *address* (a 2-tuple ``(host,
+    port)``) and return the socket object.  Passing the optional
+    *timeout* parameter will set the timeout on the socket instance
+    before attempting to connect.  If no *timeout* is supplied, the
+    global default timeout setting returned by :func:`getdefaulttimeout`
+    is used.  If *source_address* is set it must be a tuple of (host, port)
+    for the socket to bind as a source address before making the connection.
+    An host of '' or port 0 tells the OS to use the default.
+    """
+
+    host, port = address
+    if host.startswith('['):
+        host = host.strip('[]')
+    err = None
+
+    # Using the value from allowed_gai_family() in the context of getaddrinfo lets
+    # us select whether to work with IPv4 DNS records, IPv6 records, or both.
+    # The original create_connection function always returns all records.
+    family = allowed_gai_family()
+
+    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
+        af, socktype, proto, canonname, sa = res
+        sock = None
+        try:
+            sock = socket.socket(af, socktype, proto)
+
+            # If provided, set socket level options before connecting.
+            _set_socket_options(sock, socket_options)
+
+            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
+                sock.settimeout(timeout)
+            if source_address:
+                sock.bind(source_address)
+            sock.connect(sa)
+            return sock
+
+        except socket.error as e:
+            err = e
+            if sock is not None:
+                sock.close()
+                sock = None
+
+    if err is not None:
+        raise err
+
+    raise socket.error("getaddrinfo returns an empty list")
+
+
+def _set_socket_options(sock, options):
+    if options is None:
+        return
+
+    for opt in options:
+        sock.setsockopt(*opt)
+
+
+def allowed_gai_family():
+    """This function is designed to work in the context of
+    getaddrinfo, where family=socket.AF_UNSPEC is the default and
+    will perform a DNS search for both IPv6 and IPv4 records."""
+
+    family = socket.AF_INET
+    if HAS_IPV6:
+        family = socket.AF_UNSPEC
+    return family
+
+
+def _has_ipv6(host):
+    """ Returns True if the system can bind an IPv6 address. """
+    sock = None
+    has_ipv6 = False
+
+    # App Engine doesn't support IPV6 sockets and actually has a quota on the
+    # number of sockets that can be used, so just early out here instead of
+    # creating a socket needlessly.
+    # See https://github.com/urllib3/urllib3/issues/1446
+    if _appengine_environ.is_appengine_sandbox():
+        return False
+
+    if socket.has_ipv6:
+        # has_ipv6 returns true if cPython was compiled with IPv6 support.
+        # It does not tell us if the system has IPv6 support enabled. To
+        # determine that we must bind to an IPv6 address.
+        # https://github.com/shazow/urllib3/pull/611
+        # https://bugs.python.org/issue658327
+        try:
+            sock = socket.socket(socket.AF_INET6)
+            sock.bind((host, 0))
+            has_ipv6 = True
+        except Exception:
+            pass
+
+    if sock:
+        sock.close()
+    return has_ipv6
+
+
+HAS_IPV6 = _has_ipv6('::1')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/queue.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/queue.py
new file mode 100644
index 00000000..d3d379a1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/queue.py
@@ -0,0 +1,21 @@
+import collections
+from ..packages import six
+from ..packages.six.moves import queue
+
+if six.PY2:
+    # Queue is imported for side effects on MS Windows. See issue #229.
+    import Queue as _unused_module_Queue  # noqa: F401
+
+
+class LifoQueue(queue.Queue):
+    def _init(self, _):
+        self.queue = collections.deque()
+
+    def _qsize(self, len=len):
+        return len(self.queue)
+
+    def _put(self, item):
+        self.queue.append(item)
+
+    def _get(self):
+        return self.queue.pop()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/request.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/request.py
new file mode 100644
index 00000000..280b8530
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/request.py
@@ -0,0 +1,125 @@
+from __future__ import absolute_import
+from base64 import b64encode
+
+from ..packages.six import b, integer_types
+from ..exceptions import UnrewindableBodyError
+
+ACCEPT_ENCODING = 'gzip,deflate'
+try:
+    import brotli as _unused_module_brotli  # noqa: F401
+except ImportError:
+    pass
+else:
+    ACCEPT_ENCODING += ',br'
+
+_FAILEDTELL = object()
+
+
+def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
+                 basic_auth=None, proxy_basic_auth=None, disable_cache=None):
+    """
+    Shortcuts for generating request headers.
+
+    :param keep_alive:
+        If ``True``, adds 'connection: keep-alive' header.
+
+    :param accept_encoding:
+        Can be a boolean, list, or string.
+        ``True`` translates to 'gzip,deflate'.
+        List will get joined by comma.
+        String will be used as provided.
+
+    :param user_agent:
+        String representing the user-agent you want, such as
+        "python-urllib3/0.6"
+
+    :param basic_auth:
+        Colon-separated username:password string for 'authorization: basic ...'
+        auth header.
+
+    :param proxy_basic_auth:
+        Colon-separated username:password string for 'proxy-authorization: basic ...'
+        auth header.
+
+    :param disable_cache:
+        If ``True``, adds 'cache-control: no-cache' header.
+
+    Example::
+
+        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
+        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
+        >>> make_headers(accept_encoding=True)
+        {'accept-encoding': 'gzip,deflate'}
+    """
+    headers = {}
+    if accept_encoding:
+        if isinstance(accept_encoding, str):
+            pass
+        elif isinstance(accept_encoding, list):
+            accept_encoding = ','.join(accept_encoding)
+        else:
+            accept_encoding = ACCEPT_ENCODING
+        headers['accept-encoding'] = accept_encoding
+
+    if user_agent:
+        headers['user-agent'] = user_agent
+
+    if keep_alive:
+        headers['connection'] = 'keep-alive'
+
+    if basic_auth:
+        headers['authorization'] = 'Basic ' + \
+            b64encode(b(basic_auth)).decode('utf-8')
+
+    if proxy_basic_auth:
+        headers['proxy-authorization'] = 'Basic ' + \
+            b64encode(b(proxy_basic_auth)).decode('utf-8')
+
+    if disable_cache:
+        headers['cache-control'] = 'no-cache'
+
+    return headers
+
+
+def set_file_position(body, pos):
+    """
+    If a position is provided, move file to that point.
+    Otherwise, we'll attempt to record a position for future use.
+    """
+    if pos is not None:
+        rewind_body(body, pos)
+    elif getattr(body, 'tell', None) is not None:
+        try:
+            pos = body.tell()
+        except (IOError, OSError):
+            # This differentiates from None, allowing us to catch
+            # a failed `tell()` later when trying to rewind the body.
+            pos = _FAILEDTELL
+
+    return pos
+
+
+def rewind_body(body, body_pos):
+    """
+    Attempt to rewind body to a certain position.
+    Primarily used for request redirects and retries.
+
+    :param body:
+        File-like object that supports seek.
+
+    :param int pos:
+        Position to seek to in file.
+    """
+    body_seek = getattr(body, 'seek', None)
+    if body_seek is not None and isinstance(body_pos, integer_types):
+        try:
+            body_seek(body_pos)
+        except (IOError, OSError):
+            raise UnrewindableBodyError("An error occurred when rewinding request "
+                                        "body for redirect/retry.")
+    elif body_pos is _FAILEDTELL:
+        raise UnrewindableBodyError("Unable to record file position for rewinding "
+                                    "request body during a redirect/retry.")
+    else:
+        raise ValueError("body_pos must be of type integer, "
+                         "instead it was %s." % type(body_pos))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/response.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/response.py
new file mode 100644
index 00000000..3d548648
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/response.py
@@ -0,0 +1,87 @@
+from __future__ import absolute_import
+from ..packages.six.moves import http_client as httplib
+
+from ..exceptions import HeaderParsingError
+
+
+def is_fp_closed(obj):
+    """
+    Checks whether a given file-like object is closed.
+
+    :param obj:
+        The file-like object to check.
+    """
+
+    try:
+        # Check `isclosed()` first, in case Python3 doesn't set `closed`.
+        # GH Issue #928
+        return obj.isclosed()
+    except AttributeError:
+        pass
+
+    try:
+        # Check via the official file-like-object way.
+        return obj.closed
+    except AttributeError:
+        pass
+
+    try:
+        # Check if the object is a container for another file-like object that
+        # gets released on exhaustion (e.g. HTTPResponse).
+        return obj.fp is None
+    except AttributeError:
+        pass
+
+    raise ValueError("Unable to determine whether fp is closed.")
+
+
+def assert_header_parsing(headers):
+    """
+    Asserts whether all headers have been successfully parsed.
+    Extracts encountered errors from the result of parsing headers.
+
+    Only works on Python 3.
+
+    :param headers: Headers to verify.
+    :type headers: `httplib.HTTPMessage`.
+
+    :raises urllib3.exceptions.HeaderParsingError:
+        If parsing errors are found.
+    """
+
+    # This will fail silently if we pass in the wrong kind of parameter.
+    # To make debugging easier add an explicit check.
+    if not isinstance(headers, httplib.HTTPMessage):
+        raise TypeError('expected httplib.Message, got {0}.'.format(
+            type(headers)))
+
+    defects = getattr(headers, 'defects', None)
+    get_payload = getattr(headers, 'get_payload', None)
+
+    unparsed_data = None
+    if get_payload:
+        # get_payload is actually email.message.Message.get_payload;
+        # we're only interested in the result if it's not a multipart message
+        if not headers.is_multipart():
+            payload = get_payload()
+
+            if isinstance(payload, (bytes, str)):
+                unparsed_data = payload
+
+    if defects or unparsed_data:
+        raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data)
+
+
+def is_response_to_head(response):
+    """
+    Checks whether the request of a response has been a HEAD-request.
+    Handles the quirks of AppEngine.
+
+    :param conn:
+    :type conn: :class:`httplib.HTTPResponse`
+    """
+    # FIXME: Can we do this somehow without accessing private httplib _method?
+    method = response._method
+    if isinstance(method, int):  # Platform-specific: Appengine
+        return method == 3
+    return method.upper() == 'HEAD'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/retry.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/retry.py
new file mode 100644
index 00000000..02429ee8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/retry.py
@@ -0,0 +1,412 @@
+from __future__ import absolute_import
+import time
+import logging
+from collections import namedtuple
+from itertools import takewhile
+import email
+import re
+
+from ..exceptions import (
+    ConnectTimeoutError,
+    MaxRetryError,
+    ProtocolError,
+    ReadTimeoutError,
+    ResponseError,
+    InvalidHeader,
+)
+from ..packages import six
+
+
+log = logging.getLogger(__name__)
+
+
+# Data structure for representing the metadata of requests that result in a retry.
+RequestHistory = namedtuple('RequestHistory', ["method", "url", "error",
+                                               "status", "redirect_location"])
+
+
+class Retry(object):
+    """ Retry configuration.
+
+    Each retry attempt will create a new Retry object with updated values, so
+    they can be safely reused.
+
+    Retries can be defined as a default for a pool::
+
+        retries = Retry(connect=5, read=2, redirect=5)
+        http = PoolManager(retries=retries)
+        response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool)::
+
+        response = http.request('GET', 'http://example.com/', retries=Retry(10))
+
+    Retries can be disabled by passing ``False``::
+
+        response = http.request('GET', 'http://example.com/', retries=False)
+
+    Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless
+    retries are disabled, in which case the causing exception will be raised.
+
+    :param int total:
+        Total number of retries to allow. Takes precedence over other counts.
+
+        Set to ``None`` to remove this constraint and fall back on other
+        counts. It's a good idea to set this to some sensibly-high value to
+        account for unexpected edge cases and avoid infinite retry loops.
+
+        Set to ``0`` to fail on the first retry.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int connect:
+        How many connection-related errors to retry on.
+
+        These are errors raised before the request is sent to the remote server,
+        which we assume has not triggered the server to process the request.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int read:
+        How many times to retry on read errors.
+
+        These errors are raised after the request was sent to the server, so the
+        request may have side-effects.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int redirect:
+        How many redirects to perform. Limit this to avoid infinite redirect
+        loops.
+
+        A redirect is a HTTP response with a status code 301, 302, 303, 307 or
+        308.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int status:
+        How many times to retry on bad status codes.
+
+        These are retries made on responses, where status code matches
+        ``status_forcelist``.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param iterable method_whitelist:
+        Set of uppercased HTTP method verbs that we should retry on.
+
+        By default, we only retry on methods which are considered to be
+        idempotent (multiple requests with the same parameters end with the
+        same state). See :attr:`Retry.DEFAULT_METHOD_WHITELIST`.
+
+        Set to a ``False`` value to retry on any verb.
+
+    :param iterable status_forcelist:
+        A set of integer HTTP status codes that we should force a retry on.
+        A retry is initiated if the request method is in ``method_whitelist``
+        and the response status code is in ``status_forcelist``.
+
+        By default, this is disabled with ``None``.
+
+    :param float backoff_factor:
+        A backoff factor to apply between attempts after the second try
+        (most errors are resolved immediately by a second try without a
+        delay). urllib3 will sleep for::
+
+            {backoff factor} * (2 ** ({number of total retries} - 1))
+
+        seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep
+        for [0.0s, 0.2s, 0.4s, ...] between retries. It will never be longer
+        than :attr:`Retry.BACKOFF_MAX`.
+
+        By default, backoff is disabled (set to 0).
+
+    :param bool raise_on_redirect: Whether, if the number of redirects is
+        exhausted, to raise a MaxRetryError, or to return a response with a
+        response code in the 3xx range.
+
+    :param bool raise_on_status: Similar meaning to ``raise_on_redirect``:
+        whether we should raise an exception, or return a response,
+        if status falls in ``status_forcelist`` range and retries have
+        been exhausted.
+
+    :param tuple history: The history of the request encountered during
+        each call to :meth:`~Retry.increment`. The list is in the order
+        the requests occurred. Each list item is of class :class:`RequestHistory`.
+
+    :param bool respect_retry_after_header:
+        Whether to respect Retry-After header on status codes defined as
+        :attr:`Retry.RETRY_AFTER_STATUS_CODES` or not.
+
+    :param iterable remove_headers_on_redirect:
+        Sequence of headers to remove from the request when a response
+        indicating a redirect is returned before firing off the redirected
+        request.
+    """
+
+    DEFAULT_METHOD_WHITELIST = frozenset([
+        'HEAD', 'GET', 'PUT', 'DELETE', 'OPTIONS', 'TRACE'])
+
+    RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
+
+    DEFAULT_REDIRECT_HEADERS_BLACKLIST = frozenset(['Authorization'])
+
+    #: Maximum backoff time.
+    BACKOFF_MAX = 120
+
+    def __init__(self, total=10, connect=None, read=None, redirect=None, status=None,
+                 method_whitelist=DEFAULT_METHOD_WHITELIST, status_forcelist=None,
+                 backoff_factor=0, raise_on_redirect=True, raise_on_status=True,
+                 history=None, respect_retry_after_header=True,
+                 remove_headers_on_redirect=DEFAULT_REDIRECT_HEADERS_BLACKLIST):
+
+        self.total = total
+        self.connect = connect
+        self.read = read
+        self.status = status
+
+        if redirect is False or total is False:
+            redirect = 0
+            raise_on_redirect = False
+
+        self.redirect = redirect
+        self.status_forcelist = status_forcelist or set()
+        self.method_whitelist = method_whitelist
+        self.backoff_factor = backoff_factor
+        self.raise_on_redirect = raise_on_redirect
+        self.raise_on_status = raise_on_status
+        self.history = history or tuple()
+        self.respect_retry_after_header = respect_retry_after_header
+        self.remove_headers_on_redirect = frozenset([
+            h.lower() for h in remove_headers_on_redirect])
+
+    def new(self, **kw):
+        params = dict(
+            total=self.total,
+            connect=self.connect, read=self.read, redirect=self.redirect, status=self.status,
+            method_whitelist=self.method_whitelist,
+            status_forcelist=self.status_forcelist,
+            backoff_factor=self.backoff_factor,
+            raise_on_redirect=self.raise_on_redirect,
+            raise_on_status=self.raise_on_status,
+            history=self.history,
+            remove_headers_on_redirect=self.remove_headers_on_redirect
+        )
+        params.update(kw)
+        return type(self)(**params)
+
+    @classmethod
+    def from_int(cls, retries, redirect=True, default=None):
+        """ Backwards-compatibility for the old retries format."""
+        if retries is None:
+            retries = default if default is not None else cls.DEFAULT
+
+        if isinstance(retries, Retry):
+            return retries
+
+        redirect = bool(redirect) and None
+        new_retries = cls(retries, redirect=redirect)
+        log.debug("Converted retries value: %r -> %r", retries, new_retries)
+        return new_retries
+
+    def get_backoff_time(self):
+        """ Formula for computing the current backoff
+
+        :rtype: float
+        """
+        # We want to consider only the last consecutive errors sequence (Ignore redirects).
+        consecutive_errors_len = len(list(takewhile(lambda x: x.redirect_location is None,
+                                                    reversed(self.history))))
+        if consecutive_errors_len <= 1:
+            return 0
+
+        backoff_value = self.backoff_factor * (2 ** (consecutive_errors_len - 1))
+        return min(self.BACKOFF_MAX, backoff_value)
+
+    def parse_retry_after(self, retry_after):
+        # Whitespace: https://tools.ietf.org/html/rfc7230#section-3.2.4
+        if re.match(r"^\s*[0-9]+\s*$", retry_after):
+            seconds = int(retry_after)
+        else:
+            retry_date_tuple = email.utils.parsedate(retry_after)
+            if retry_date_tuple is None:
+                raise InvalidHeader("Invalid Retry-After header: %s" % retry_after)
+            retry_date = time.mktime(retry_date_tuple)
+            seconds = retry_date - time.time()
+
+        if seconds < 0:
+            seconds = 0
+
+        return seconds
+
+    def get_retry_after(self, response):
+        """ Get the value of Retry-After in seconds. """
+
+        retry_after = response.getheader("Retry-After")
+
+        if retry_after is None:
+            return None
+
+        return self.parse_retry_after(retry_after)
+
+    def sleep_for_retry(self, response=None):
+        retry_after = self.get_retry_after(response)
+        if retry_after:
+            time.sleep(retry_after)
+            return True
+
+        return False
+
+    def _sleep_backoff(self):
+        backoff = self.get_backoff_time()
+        if backoff <= 0:
+            return
+        time.sleep(backoff)
+
+    def sleep(self, response=None):
+        """ Sleep between retry attempts.
+
+        This method will respect a server's ``Retry-After`` response header
+        and sleep the duration of the time requested. If that is not present, it
+        will use an exponential backoff. By default, the backoff factor is 0 and
+        this method will return immediately.
+        """
+
+        if response:
+            slept = self.sleep_for_retry(response)
+            if slept:
+                return
+
+        self._sleep_backoff()
+
+    def _is_connection_error(self, err):
+        """ Errors when we're fairly sure that the server did not receive the
+        request, so it should be safe to retry.
+        """
+        return isinstance(err, ConnectTimeoutError)
+
+    def _is_read_error(self, err):
+        """ Errors that occur after the request has been started, so we should
+        assume that the server began processing it.
+        """
+        return isinstance(err, (ReadTimeoutError, ProtocolError))
+
+    def _is_method_retryable(self, method):
+        """ Checks if a given HTTP method should be retried upon, depending if
+        it is included on the method whitelist.
+        """
+        if self.method_whitelist and method.upper() not in self.method_whitelist:
+            return False
+
+        return True
+
+    def is_retry(self, method, status_code, has_retry_after=False):
+        """ Is this method/status code retryable? (Based on whitelists and control
+        variables such as the number of total retries to allow, whether to
+        respect the Retry-After header, whether this header is present, and
+        whether the returned status code is on the list of status codes to
+        be retried upon on the presence of the aforementioned header)
+        """
+        if not self._is_method_retryable(method):
+            return False
+
+        if self.status_forcelist and status_code in self.status_forcelist:
+            return True
+
+        return (self.total and self.respect_retry_after_header and
+                has_retry_after and (status_code in self.RETRY_AFTER_STATUS_CODES))
+
+    def is_exhausted(self):
+        """ Are we out of retries? """
+        retry_counts = (self.total, self.connect, self.read, self.redirect, self.status)
+        retry_counts = list(filter(None, retry_counts))
+        if not retry_counts:
+            return False
+
+        return min(retry_counts) < 0
+
+    def increment(self, method=None, url=None, response=None, error=None,
+                  _pool=None, _stacktrace=None):
+        """ Return a new Retry object with incremented retry counters.
+
+        :param response: A response object, or None, if the server did not
+            return a response.
+        :type response: :class:`~urllib3.response.HTTPResponse`
+        :param Exception error: An error encountered during the request, or
+            None if the response was received successfully.
+
+        :return: A new ``Retry`` object.
+        """
+        if self.total is False and error:
+            # Disabled, indicate to re-raise the error.
+            raise six.reraise(type(error), error, _stacktrace)
+
+        total = self.total
+        if total is not None:
+            total -= 1
+
+        connect = self.connect
+        read = self.read
+        redirect = self.redirect
+        status_count = self.status
+        cause = 'unknown'
+        status = None
+        redirect_location = None
+
+        if error and self._is_connection_error(error):
+            # Connect retry?
+            if connect is False:
+                raise six.reraise(type(error), error, _stacktrace)
+            elif connect is not None:
+                connect -= 1
+
+        elif error and self._is_read_error(error):
+            # Read retry?
+            if read is False or not self._is_method_retryable(method):
+                raise six.reraise(type(error), error, _stacktrace)
+            elif read is not None:
+                read -= 1
+
+        elif response and response.get_redirect_location():
+            # Redirect retry?
+            if redirect is not None:
+                redirect -= 1
+            cause = 'too many redirects'
+            redirect_location = response.get_redirect_location()
+            status = response.status
+
+        else:
+            # Incrementing because of a server error like a 500 in
+            # status_forcelist and a the given method is in the whitelist
+            cause = ResponseError.GENERIC_ERROR
+            if response and response.status:
+                if status_count is not None:
+                    status_count -= 1
+                cause = ResponseError.SPECIFIC_ERROR.format(
+                    status_code=response.status)
+                status = response.status
+
+        history = self.history + (RequestHistory(method, url, error, status, redirect_location),)
+
+        new_retry = self.new(
+            total=total,
+            connect=connect, read=read, redirect=redirect, status=status_count,
+            history=history)
+
+        if new_retry.is_exhausted():
+            raise MaxRetryError(_pool, url, error or ResponseError(cause))
+
+        log.debug("Incremented Retry for (url='%s'): %r", url, new_retry)
+
+        return new_retry
+
+    def __repr__(self):
+        return ('{cls.__name__}(total={self.total}, connect={self.connect}, '
+                'read={self.read}, redirect={self.redirect}, status={self.status})').format(
+                    cls=type(self), self=self)
+
+
+# For backwards compatibility (equivalent to pre-v1.9):
+Retry.DEFAULT = Retry(3)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/ssl_.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/ssl_.py
new file mode 100644
index 00000000..fbdef65d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/ssl_.py
@@ -0,0 +1,392 @@
+from __future__ import absolute_import
+import errno
+import warnings
+import hmac
+import re
+
+from binascii import hexlify, unhexlify
+from hashlib import md5, sha1, sha256
+
+from ..exceptions import SSLError, InsecurePlatformWarning, SNIMissingWarning
+from ..packages import six
+from ..packages.rfc3986 import abnf_regexp
+
+
+SSLContext = None
+HAS_SNI = False
+IS_PYOPENSSL = False
+IS_SECURETRANSPORT = False
+
+# Maps the length of a digest to a possible hash function producing this digest
+HASHFUNC_MAP = {
+    32: md5,
+    40: sha1,
+    64: sha256,
+}
+
+
+def _const_compare_digest_backport(a, b):
+    """
+    Compare two digests of equal length in constant time.
+
+    The digests must be of type str/bytes.
+    Returns True if the digests match, and False otherwise.
+    """
+    result = abs(len(a) - len(b))
+    for l, r in zip(bytearray(a), bytearray(b)):
+        result |= l ^ r
+    return result == 0
+
+
+_const_compare_digest = getattr(hmac, 'compare_digest',
+                                _const_compare_digest_backport)
+
+# Borrow rfc3986's regular expressions for IPv4
+# and IPv6 addresses for use in is_ipaddress()
+_IP_ADDRESS_REGEX = re.compile(
+    r'^(?:%s|%s|%s)$' % (
+        abnf_regexp.IPv4_RE,
+        abnf_regexp.IPv6_RE,
+        abnf_regexp.IPv6_ADDRZ_RFC4007_RE
+    )
+)
+
+try:  # Test for SSL features
+    import ssl
+    from ssl import wrap_socket, CERT_REQUIRED
+    from ssl import HAS_SNI  # Has SNI?
+except ImportError:
+    pass
+
+try:  # Platform-specific: Python 3.6
+    from ssl import PROTOCOL_TLS
+    PROTOCOL_SSLv23 = PROTOCOL_TLS
+except ImportError:
+    try:
+        from ssl import PROTOCOL_SSLv23 as PROTOCOL_TLS
+        PROTOCOL_SSLv23 = PROTOCOL_TLS
+    except ImportError:
+        PROTOCOL_SSLv23 = PROTOCOL_TLS = 2
+
+
+try:
+    from ssl import OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_COMPRESSION
+except ImportError:
+    OP_NO_SSLv2, OP_NO_SSLv3 = 0x1000000, 0x2000000
+    OP_NO_COMPRESSION = 0x20000
+
+
+# A secure default.
+# Sources for more information on TLS ciphers:
+#
+# - https://wiki.mozilla.org/Security/Server_Side_TLS
+# - https://www.ssllabs.com/projects/best-practices/index.html
+# - https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
+#
+# The general intent is:
+# - prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE),
+# - prefer ECDHE over DHE for better performance,
+# - prefer any AES-GCM and ChaCha20 over any AES-CBC for better performance and
+#   security,
+# - prefer AES-GCM over ChaCha20 because hardware-accelerated AES is common,
+# - disable NULL authentication, MD5 MACs, DSS, and other
+#   insecure ciphers for security reasons.
+# - NOTE: TLS 1.3 cipher suites are managed through a different interface
+#   not exposed by CPython (yet!) and are enabled by default if they're available.
+DEFAULT_CIPHERS = ':'.join([
+    'ECDHE+AESGCM',
+    'ECDHE+CHACHA20',
+    'DHE+AESGCM',
+    'DHE+CHACHA20',
+    'ECDH+AESGCM',
+    'DH+AESGCM',
+    'ECDH+AES',
+    'DH+AES',
+    'RSA+AESGCM',
+    'RSA+AES',
+    '!aNULL',
+    '!eNULL',
+    '!MD5',
+    '!DSS',
+])
+
+try:
+    from ssl import SSLContext  # Modern SSL?
+except ImportError:
+    class SSLContext(object):  # Platform-specific: Python 2
+        def __init__(self, protocol_version):
+            self.protocol = protocol_version
+            # Use default values from a real SSLContext
+            self.check_hostname = False
+            self.verify_mode = ssl.CERT_NONE
+            self.ca_certs = None
+            self.options = 0
+            self.certfile = None
+            self.keyfile = None
+            self.ciphers = None
+
+        def load_cert_chain(self, certfile, keyfile):
+            self.certfile = certfile
+            self.keyfile = keyfile
+
+        def load_verify_locations(self, cafile=None, capath=None):
+            self.ca_certs = cafile
+
+            if capath is not None:
+                raise SSLError("CA directories not supported in older Pythons")
+
+        def set_ciphers(self, cipher_suite):
+            self.ciphers = cipher_suite
+
+        def wrap_socket(self, socket, server_hostname=None, server_side=False):
+            warnings.warn(
+                'A true SSLContext object is not available. This prevents '
+                'urllib3 from configuring SSL appropriately and may cause '
+                'certain SSL connections to fail. You can upgrade to a newer '
+                'version of Python to solve this. For more information, see '
+                'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
+                '#ssl-warnings',
+                InsecurePlatformWarning
+            )
+            kwargs = {
+                'keyfile': self.keyfile,
+                'certfile': self.certfile,
+                'ca_certs': self.ca_certs,
+                'cert_reqs': self.verify_mode,
+                'ssl_version': self.protocol,
+                'server_side': server_side,
+            }
+            return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
+
+
+def assert_fingerprint(cert, fingerprint):
+    """
+    Checks if given fingerprint matches the supplied certificate.
+
+    :param cert:
+        Certificate as bytes object.
+    :param fingerprint:
+        Fingerprint as string of hexdigits, can be interspersed by colons.
+    """
+
+    fingerprint = fingerprint.replace(':', '').lower()
+    digest_length = len(fingerprint)
+    hashfunc = HASHFUNC_MAP.get(digest_length)
+    if not hashfunc:
+        raise SSLError(
+            'Fingerprint of invalid length: {0}'.format(fingerprint))
+
+    # We need encode() here for py32; works on py2 and p33.
+    fingerprint_bytes = unhexlify(fingerprint.encode())
+
+    cert_digest = hashfunc(cert).digest()
+
+    if not _const_compare_digest(cert_digest, fingerprint_bytes):
+        raise SSLError('Fingerprints did not match. Expected "{0}", got "{1}".'
+                       .format(fingerprint, hexlify(cert_digest)))
+
+
+def resolve_cert_reqs(candidate):
+    """
+    Resolves the argument to a numeric constant, which can be passed to
+    the wrap_socket function/method from the ssl module.
+    Defaults to :data:`ssl.CERT_NONE`.
+    If given a string it is assumed to be the name of the constant in the
+    :mod:`ssl` module or its abbreviation.
+    (So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
+    If it's neither `None` nor a string we assume it is already the numeric
+    constant which can directly be passed to wrap_socket.
+    """
+    if candidate is None:
+        return CERT_REQUIRED
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, 'CERT_' + candidate)
+        return res
+
+    return candidate
+
+
+def resolve_ssl_version(candidate):
+    """
+    like resolve_cert_reqs
+    """
+    if candidate is None:
+        return PROTOCOL_TLS
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, 'PROTOCOL_' + candidate)
+        return res
+
+    return candidate
+
+
+def create_urllib3_context(ssl_version=None, cert_reqs=None,
+                           options=None, ciphers=None):
+    """All arguments have the same meaning as ``ssl_wrap_socket``.
+
+    By default, this function does a lot of the same work that
+    ``ssl.create_default_context`` does on Python 3.4+. It:
+
+    - Disables SSLv2, SSLv3, and compression
+    - Sets a restricted set of server ciphers
+
+    If you wish to enable SSLv3, you can do::
+
+        from pip._vendor.urllib3.util import ssl_
+        context = ssl_.create_urllib3_context()
+        context.options &= ~ssl_.OP_NO_SSLv3
+
+    You can do the same to enable compression (substituting ``COMPRESSION``
+    for ``SSLv3`` in the last line above).
+
+    :param ssl_version:
+        The desired protocol version to use. This will default to
+        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
+        the server and your installation of OpenSSL support.
+    :param cert_reqs:
+        Whether to require the certificate verification. This defaults to
+        ``ssl.CERT_REQUIRED``.
+    :param options:
+        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
+        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
+    :param ciphers:
+        Which cipher suites to allow the server to select.
+    :returns:
+        Constructed SSLContext object with specified options
+    :rtype: SSLContext
+    """
+    context = SSLContext(ssl_version or PROTOCOL_TLS)
+
+    context.set_ciphers(ciphers or DEFAULT_CIPHERS)
+
+    # Setting the default here, as we may have no ssl module on import
+    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
+
+    if options is None:
+        options = 0
+        # SSLv2 is easily broken and is considered harmful and dangerous
+        options |= OP_NO_SSLv2
+        # SSLv3 has several problems and is now dangerous
+        options |= OP_NO_SSLv3
+        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
+        # (issue #309)
+        options |= OP_NO_COMPRESSION
+
+    context.options |= options
+
+    context.verify_mode = cert_reqs
+    if getattr(context, 'check_hostname', None) is not None:  # Platform-specific: Python 3.2
+        # We do our own verification, including fingerprints and alternative
+        # hostnames. So disable it here
+        context.check_hostname = False
+    return context
+
+
+def ssl_wrap_socket(sock, keyfile=None, certfile=None, cert_reqs=None,
+                    ca_certs=None, server_hostname=None,
+                    ssl_version=None, ciphers=None, ssl_context=None,
+                    ca_cert_dir=None, key_password=None):
+    """
+    All arguments except for server_hostname, ssl_context, and ca_cert_dir have
+    the same meaning as they do when using :func:`ssl.wrap_socket`.
+
+    :param server_hostname:
+        When SNI is supported, the expected hostname of the certificate
+    :param ssl_context:
+        A pre-made :class:`SSLContext` object. If none is provided, one will
+        be created using :func:`create_urllib3_context`.
+    :param ciphers:
+        A string of ciphers we wish the client to support.
+    :param ca_cert_dir:
+        A directory containing CA certificates in multiple separate files, as
+        supported by OpenSSL's -CApath flag or the capath argument to
+        SSLContext.load_verify_locations().
+    :param key_password:
+        Optional password if the keyfile is encrypted.
+    """
+    context = ssl_context
+    if context is None:
+        # Note: This branch of code and all the variables in it are no longer
+        # used by urllib3 itself. We should consider deprecating and removing
+        # this code.
+        context = create_urllib3_context(ssl_version, cert_reqs,
+                                         ciphers=ciphers)
+
+    if ca_certs or ca_cert_dir:
+        try:
+            context.load_verify_locations(ca_certs, ca_cert_dir)
+        except IOError as e:  # Platform-specific: Python 2.7
+            raise SSLError(e)
+        # Py33 raises FileNotFoundError which subclasses OSError
+        # These are not equivalent unless we check the errno attribute
+        except OSError as e:  # Platform-specific: Python 3.3 and beyond
+            if e.errno == errno.ENOENT:
+                raise SSLError(e)
+            raise
+
+    elif ssl_context is None and hasattr(context, 'load_default_certs'):
+        # try to load OS default certs; works well on Windows (require Python3.4+)
+        context.load_default_certs()
+
+    # Attempt to detect if we get the goofy behavior of the
+    # keyfile being encrypted and OpenSSL asking for the
+    # passphrase via the terminal and instead error out.
+    if keyfile and key_password is None and _is_key_file_encrypted(keyfile):
+        raise SSLError("Client private key is encrypted, password is required")
+
+    if certfile:
+        if key_password is None:
+            context.load_cert_chain(certfile, keyfile)
+        else:
+            context.load_cert_chain(certfile, keyfile, key_password)
+
+    # If we detect server_hostname is an IP address then the SNI
+    # extension should not be used according to RFC3546 Section 3.1
+    # We shouldn't warn the user if SNI isn't available but we would
+    # not be using SNI anyways due to IP address for server_hostname.
+    if ((server_hostname is not None and not is_ipaddress(server_hostname))
+            or IS_SECURETRANSPORT):
+        if HAS_SNI and server_hostname is not None:
+            return context.wrap_socket(sock, server_hostname=server_hostname)
+
+        warnings.warn(
+            'An HTTPS request has been made, but the SNI (Server Name '
+            'Indication) extension to TLS is not available on this platform. '
+            'This may cause the server to present an incorrect TLS '
+            'certificate, which can cause validation failures. You can upgrade to '
+            'a newer version of Python to solve this. For more information, see '
+            'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
+            '#ssl-warnings',
+            SNIMissingWarning
+        )
+
+    return context.wrap_socket(sock)
+
+
+def is_ipaddress(hostname):
+    """Detects whether the hostname given is an IPv4 or IPv6 address.
+    Also detects IPv6 addresses with Zone IDs.
+
+    :param str hostname: Hostname to examine.
+    :return: True if the hostname is an IP address, False otherwise.
+    """
+    if six.PY3 and isinstance(hostname, bytes):
+        # IDN A-label bytes are ASCII compatible.
+        hostname = hostname.decode('ascii')
+    return _IP_ADDRESS_REGEX.match(hostname) is not None
+
+
+def _is_key_file_encrypted(key_file):
+    """Detects if a key file is encrypted or not."""
+    with open(key_file, 'r') as f:
+        for line in f:
+            # Look for Proc-Type: 4,ENCRYPTED
+            if 'ENCRYPTED' in line:
+                return True
+
+    return False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/timeout.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/timeout.py
new file mode 100644
index 00000000..a4d004a8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/timeout.py
@@ -0,0 +1,243 @@
+from __future__ import absolute_import
+# The default socket timeout, used by httplib to indicate that no timeout was
+# specified by the user
+from socket import _GLOBAL_DEFAULT_TIMEOUT
+import time
+
+from ..exceptions import TimeoutStateError
+
+# A sentinel value to indicate that no timeout was specified by the user in
+# urllib3
+_Default = object()
+
+
+# Use time.monotonic if available.
+current_time = getattr(time, "monotonic", time.time)
+
+
+class Timeout(object):
+    """ Timeout configuration.
+
+    Timeouts can be defined as a default for a pool::
+
+        timeout = Timeout(connect=2.0, read=7.0)
+        http = PoolManager(timeout=timeout)
+        response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool)::
+
+        response = http.request('GET', 'http://example.com/', timeout=Timeout(10))
+
+    Timeouts can be disabled by setting all the parameters to ``None``::
+
+        no_timeout = Timeout(connect=None, read=None)
+        response = http.request('GET', 'http://example.com/, timeout=no_timeout)
+
+
+    :param total:
+        This combines the connect and read timeouts into one; the read timeout
+        will be set to the time leftover from the connect attempt. In the
+        event that both a connect timeout and a total are specified, or a read
+        timeout and a total are specified, the shorter timeout will be applied.
+
+        Defaults to None.
+
+    :type total: integer, float, or None
+
+    :param connect:
+        The maximum amount of time to wait for a connection attempt to a server
+        to succeed. Omitting the parameter will default the connect timeout to
+        the system default, probably `the global default timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout for connection attempts.
+
+    :type connect: integer, float, or None
+
+    :param read:
+        The maximum amount of time to wait between consecutive
+        read operations for a response from the server. Omitting
+        the parameter will default the read timeout to the system
+        default, probably `the global default timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout.
+
+    :type read: integer, float, or None
+
+    .. note::
+
+        Many factors can affect the total amount of time for urllib3 to return
+        an HTTP response.
+
+        For example, Python's DNS resolver does not obey the timeout specified
+        on the socket. Other factors that can affect total request time include
+        high CPU load, high swap, the program running at a low priority level,
+        or other behaviors.
+
+        In addition, the read and total timeouts only measure the time between
+        read operations on the socket connecting the client and the server,
+        not the total amount of time for the request to return a complete
+        response. For most requests, the timeout is raised because the server
+        has not sent the first byte in the specified time. This is not always
+        the case; if a server streams one byte every fifteen seconds, a timeout
+        of 20 seconds will not trigger, even though the request will take
+        several minutes to complete.
+
+        If your goal is to cut off any request after a set amount of wall clock
+        time, consider having a second "watcher" thread to cut off a slow
+        request.
+    """
+
+    #: A sentinel object representing the default timeout value
+    DEFAULT_TIMEOUT = _GLOBAL_DEFAULT_TIMEOUT
+
+    def __init__(self, total=None, connect=_Default, read=_Default):
+        self._connect = self._validate_timeout(connect, 'connect')
+        self._read = self._validate_timeout(read, 'read')
+        self.total = self._validate_timeout(total, 'total')
+        self._start_connect = None
+
+    def __str__(self):
+        return '%s(connect=%r, read=%r, total=%r)' % (
+            type(self).__name__, self._connect, self._read, self.total)
+
+    @classmethod
+    def _validate_timeout(cls, value, name):
+        """ Check that a timeout attribute is valid.
+
+        :param value: The timeout value to validate
+        :param name: The name of the timeout attribute to validate. This is
+            used to specify in error messages.
+        :return: The validated and casted version of the given value.
+        :raises ValueError: If it is a numeric value less than or equal to
+            zero, or the type is not an integer, float, or None.
+        """
+        if value is _Default:
+            return cls.DEFAULT_TIMEOUT
+
+        if value is None or value is cls.DEFAULT_TIMEOUT:
+            return value
+
+        if isinstance(value, bool):
+            raise ValueError("Timeout cannot be a boolean value. It must "
+                             "be an int, float or None.")
+        try:
+            float(value)
+        except (TypeError, ValueError):
+            raise ValueError("Timeout value %s was %s, but it must be an "
+                             "int, float or None." % (name, value))
+
+        try:
+            if value <= 0:
+                raise ValueError("Attempted to set %s timeout to %s, but the "
+                                 "timeout cannot be set to a value less "
+                                 "than or equal to 0." % (name, value))
+        except TypeError:
+            # Python 3
+            raise ValueError("Timeout value %s was %s, but it must be an "
+                             "int, float or None." % (name, value))
+
+        return value
+
+    @classmethod
+    def from_float(cls, timeout):
+        """ Create a new Timeout from a legacy timeout value.
+
+        The timeout value used by httplib.py sets the same timeout on the
+        connect(), and recv() socket requests. This creates a :class:`Timeout`
+        object that sets the individual timeouts to the ``timeout`` value
+        passed to this function.
+
+        :param timeout: The legacy timeout value.
+        :type timeout: integer, float, sentinel default object, or None
+        :return: Timeout object
+        :rtype: :class:`Timeout`
+        """
+        return Timeout(read=timeout, connect=timeout)
+
+    def clone(self):
+        """ Create a copy of the timeout object
+
+        Timeout properties are stored per-pool but each request needs a fresh
+        Timeout object to ensure each one has its own start/stop configured.
+
+        :return: a copy of the timeout object
+        :rtype: :class:`Timeout`
+        """
+        # We can't use copy.deepcopy because that will also create a new object
+        # for _GLOBAL_DEFAULT_TIMEOUT, which socket.py uses as a sentinel to
+        # detect the user default.
+        return Timeout(connect=self._connect, read=self._read,
+                       total=self.total)
+
+    def start_connect(self):
+        """ Start the timeout clock, used during a connect() attempt
+
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to start a timer that has been started already.
+        """
+        if self._start_connect is not None:
+            raise TimeoutStateError("Timeout timer has already been started.")
+        self._start_connect = current_time()
+        return self._start_connect
+
+    def get_connect_duration(self):
+        """ Gets the time elapsed since the call to :meth:`start_connect`.
+
+        :return: Elapsed time.
+        :rtype: float
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to get duration for a timer that hasn't been started.
+        """
+        if self._start_connect is None:
+            raise TimeoutStateError("Can't get connect duration for timer "
+                                    "that has not started.")
+        return current_time() - self._start_connect
+
+    @property
+    def connect_timeout(self):
+        """ Get the value to use when setting a connection timeout.
+
+        This will be a positive float or integer, the value None
+        (never timeout), or the default system timeout.
+
+        :return: Connect timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        """
+        if self.total is None:
+            return self._connect
+
+        if self._connect is None or self._connect is self.DEFAULT_TIMEOUT:
+            return self.total
+
+        return min(self._connect, self.total)
+
+    @property
+    def read_timeout(self):
+        """ Get the value for the read timeout.
+
+        This assumes some time has elapsed in the connection timeout and
+        computes the read timeout appropriately.
+
+        If self.total is set, the read timeout is dependent on the amount of
+        time taken by the connect timeout. If the connection time has not been
+        established, a :exc:`~urllib3.exceptions.TimeoutStateError` will be
+        raised.
+
+        :return: Value to use for the read timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        :raises urllib3.exceptions.TimeoutStateError: If :meth:`start_connect`
+            has not yet been called on this object.
+        """
+        if (self.total is not None and
+                self.total is not self.DEFAULT_TIMEOUT and
+                self._read is not None and
+                self._read is not self.DEFAULT_TIMEOUT):
+            # In case the connect timeout has not yet been established.
+            if self._start_connect is None:
+                return self._read
+            return max(0, min(self.total - self.get_connect_duration(),
+                              self._read))
+        elif self.total is not None and self.total is not self.DEFAULT_TIMEOUT:
+            return max(0, self.total - self.get_connect_duration())
+        else:
+            return self._read
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/url.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/url.py
new file mode 100644
index 00000000..aefa119b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/url.py
@@ -0,0 +1,289 @@
+from __future__ import absolute_import
+import re
+from collections import namedtuple
+
+from ..exceptions import LocationParseError
+from ..packages import six, rfc3986
+from ..packages.rfc3986.exceptions import RFC3986Exception, ValidationError
+from ..packages.rfc3986.validators import Validator
+from ..packages.rfc3986 import abnf_regexp, normalizers, compat, misc
+
+
+url_attrs = ['scheme', 'auth', 'host', 'port', 'path', 'query', 'fragment']
+
+# We only want to normalize urls with an HTTP(S) scheme.
+# urllib3 infers URLs without a scheme (None) to be http.
+NORMALIZABLE_SCHEMES = ('http', 'https', None)
+
+# Regex for detecting URLs with schemes. RFC 3986 Section 3.1
+SCHEME_REGEX = re.compile(r"^(?:[a-zA-Z][a-zA-Z0-9+\-]*:|/)")
+
+PATH_CHARS = abnf_regexp.UNRESERVED_CHARS_SET | abnf_regexp.SUB_DELIMITERS_SET | {':', '@', '/'}
+QUERY_CHARS = FRAGMENT_CHARS = PATH_CHARS | {'?'}
+
+
+class Url(namedtuple('Url', url_attrs)):
+    """
+    Data structure for representing an HTTP URL. Used as a return value for
+    :func:`parse_url`. Both the scheme and host are normalized as they are
+    both case-insensitive according to RFC 3986.
+    """
+    __slots__ = ()
+
+    def __new__(cls, scheme=None, auth=None, host=None, port=None, path=None,
+                query=None, fragment=None):
+        if path and not path.startswith('/'):
+            path = '/' + path
+        if scheme is not None:
+            scheme = scheme.lower()
+        return super(Url, cls).__new__(cls, scheme, auth, host, port, path,
+                                       query, fragment)
+
+    @property
+    def hostname(self):
+        """For backwards-compatibility with urlparse. We're nice like that."""
+        return self.host
+
+    @property
+    def request_uri(self):
+        """Absolute path including the query string."""
+        uri = self.path or '/'
+
+        if self.query is not None:
+            uri += '?' + self.query
+
+        return uri
+
+    @property
+    def netloc(self):
+        """Network location including host and port"""
+        if self.port:
+            return '%s:%d' % (self.host, self.port)
+        return self.host
+
+    @property
+    def url(self):
+        """
+        Convert self into a url
+
+        This function should more or less round-trip with :func:`.parse_url`. The
+        returned url may not be exactly the same as the url inputted to
+        :func:`.parse_url`, but it should be equivalent by the RFC (e.g., urls
+        with a blank port will have : removed).
+
+        Example: ::
+
+            >>> U = parse_url('http://google.com/mail/')
+            >>> U.url
+            'http://google.com/mail/'
+            >>> Url('http', 'username:password', 'host.com', 80,
+            ... '/path', 'query', 'fragment').url
+            'http://username:password@host.com:80/path?query#fragment'
+        """
+        scheme, auth, host, port, path, query, fragment = self
+        url = u''
+
+        # We use "is not None" we want things to happen with empty strings (or 0 port)
+        if scheme is not None:
+            url += scheme + u'://'
+        if auth is not None:
+            url += auth + u'@'
+        if host is not None:
+            url += host
+        if port is not None:
+            url += u':' + str(port)
+        if path is not None:
+            url += path
+        if query is not None:
+            url += u'?' + query
+        if fragment is not None:
+            url += u'#' + fragment
+
+        return url
+
+    def __str__(self):
+        return self.url
+
+
+def split_first(s, delims):
+    """
+    .. deprecated:: 1.25
+
+    Given a string and an iterable of delimiters, split on the first found
+    delimiter. Return two split parts and the matched delimiter.
+
+    If not found, then the first part is the full input string.
+
+    Example::
+
+        >>> split_first('foo/bar?baz', '?/=')
+        ('foo', 'bar?baz', '/')
+        >>> split_first('foo/bar?baz', '123')
+        ('foo/bar?baz', '', None)
+
+    Scales linearly with number of delims. Not ideal for large number of delims.
+    """
+    min_idx = None
+    min_delim = None
+    for d in delims:
+        idx = s.find(d)
+        if idx < 0:
+            continue
+
+        if min_idx is None or idx < min_idx:
+            min_idx = idx
+            min_delim = d
+
+    if min_idx is None or min_idx < 0:
+        return s, '', None
+
+    return s[:min_idx], s[min_idx + 1:], min_delim
+
+
+def _encode_invalid_chars(component, allowed_chars, encoding='utf-8'):
+    """Percent-encodes a URI component without reapplying
+    onto an already percent-encoded component. Based on
+    rfc3986.normalizers.encode_component()
+    """
+    if component is None:
+        return component
+
+    # Try to see if the component we're encoding is already percent-encoded
+    # so we can skip all '%' characters but still encode all others.
+    percent_encodings = len(normalizers.PERCENT_MATCHER.findall(
+                            compat.to_str(component, encoding)))
+
+    uri_bytes = component.encode('utf-8', 'surrogatepass')
+    is_percent_encoded = percent_encodings == uri_bytes.count(b'%')
+
+    encoded_component = bytearray()
+
+    for i in range(0, len(uri_bytes)):
+        # Will return a single character bytestring on both Python 2 & 3
+        byte = uri_bytes[i:i+1]
+        byte_ord = ord(byte)
+        if ((is_percent_encoded and byte == b'%')
+                or (byte_ord < 128 and byte.decode() in allowed_chars)):
+            encoded_component.extend(byte)
+            continue
+        encoded_component.extend('%{0:02x}'.format(byte_ord).encode().upper())
+
+    return encoded_component.decode(encoding)
+
+
+def parse_url(url):
+    """
+    Given a url, return a parsed :class:`.Url` namedtuple. Best-effort is
+    performed to parse incomplete urls. Fields not provided will be None.
+    This parser is RFC 3986 compliant.
+
+    :param str url: URL to parse into a :class:`.Url` namedtuple.
+
+    Partly backwards-compatible with :mod:`urlparse`.
+
+    Example::
+
+        >>> parse_url('http://google.com/mail/')
+        Url(scheme='http', host='google.com', port=None, path='/mail/', ...)
+        >>> parse_url('google.com:80')
+        Url(scheme=None, host='google.com', port=80, path=None, ...)
+        >>> parse_url('/foo?bar')
+        Url(scheme=None, host=None, port=None, path='/foo', query='bar', ...)
+    """
+    if not url:
+        # Empty
+        return Url()
+
+    is_string = not isinstance(url, six.binary_type)
+
+    # RFC 3986 doesn't like URLs that have a host but don't start
+    # with a scheme and we support URLs like that so we need to
+    # detect that problem and add an empty scheme indication.
+    # We don't get hurt on path-only URLs here as it's stripped
+    # off and given an empty scheme anyways.
+    if not SCHEME_REGEX.search(url):
+        url = "//" + url
+
+    def idna_encode(name):
+        if name and any([ord(x) > 128 for x in name]):
+            try:
+                from pip._vendor import idna
+            except ImportError:
+                raise LocationParseError("Unable to parse URL without the 'idna' module")
+            try:
+                return idna.encode(name.lower(), strict=True, std3_rules=True)
+            except idna.IDNAError:
+                raise LocationParseError(u"Name '%s' is not a valid IDNA label" % name)
+        return name
+
+    try:
+        split_iri = misc.IRI_MATCHER.match(compat.to_str(url)).groupdict()
+        iri_ref = rfc3986.IRIReference(
+            split_iri['scheme'], split_iri['authority'],
+            _encode_invalid_chars(split_iri['path'], PATH_CHARS),
+            _encode_invalid_chars(split_iri['query'], QUERY_CHARS),
+            _encode_invalid_chars(split_iri['fragment'], FRAGMENT_CHARS)
+        )
+        has_authority = iri_ref.authority is not None
+        uri_ref = iri_ref.encode(idna_encoder=idna_encode)
+    except (ValueError, RFC3986Exception):
+        return six.raise_from(LocationParseError(url), None)
+
+    # rfc3986 strips the authority if it's invalid
+    if has_authority and uri_ref.authority is None:
+        raise LocationParseError(url)
+
+    # Only normalize schemes we understand to not break http+unix
+    # or other schemes that don't follow RFC 3986.
+    if uri_ref.scheme is None or uri_ref.scheme.lower() in NORMALIZABLE_SCHEMES:
+        uri_ref = uri_ref.normalize()
+
+    # Validate all URIReference components and ensure that all
+    # components that were set before are still set after
+    # normalization has completed.
+    validator = Validator()
+    try:
+        validator.check_validity_of(
+            *validator.COMPONENT_NAMES
+        ).validate(uri_ref)
+    except ValidationError:
+        return six.raise_from(LocationParseError(url), None)
+
+    # For the sake of backwards compatibility we put empty
+    # string values for path if there are any defined values
+    # beyond the path in the URL.
+    # TODO: Remove this when we break backwards compatibility.
+    path = uri_ref.path
+    if not path:
+        if (uri_ref.query is not None
+                or uri_ref.fragment is not None):
+            path = ""
+        else:
+            path = None
+
+    # Ensure that each part of the URL is a `str` for
+    # backwards compatibility.
+    def to_input_type(x):
+        if x is None:
+            return None
+        elif not is_string and not isinstance(x, six.binary_type):
+            return x.encode('utf-8')
+        return x
+
+    return Url(
+        scheme=to_input_type(uri_ref.scheme),
+        auth=to_input_type(uri_ref.userinfo),
+        host=to_input_type(uri_ref.host),
+        port=int(uri_ref.port) if uri_ref.port is not None else None,
+        path=to_input_type(path),
+        query=to_input_type(uri_ref.query),
+        fragment=to_input_type(uri_ref.fragment)
+    )
+
+
+def get_host(url):
+    """
+    Deprecated. Use :func:`parse_url` instead.
+    """
+    p = parse_url(url)
+    return p.scheme or 'http', p.hostname, p.port
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/wait.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/wait.py
new file mode 100644
index 00000000..4db71baf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/urllib3/util/wait.py
@@ -0,0 +1,150 @@
+import errno
+from functools import partial
+import select
+import sys
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
+
+__all__ = ["NoWayToWaitForSocketError", "wait_for_read", "wait_for_write"]
+
+
+class NoWayToWaitForSocketError(Exception):
+    pass
+
+
+# How should we wait on sockets?
+#
+# There are two types of APIs you can use for waiting on sockets: the fancy
+# modern stateful APIs like epoll/kqueue, and the older stateless APIs like
+# select/poll. The stateful APIs are more efficient when you have a lots of
+# sockets to keep track of, because you can set them up once and then use them
+# lots of times. But we only ever want to wait on a single socket at a time
+# and don't want to keep track of state, so the stateless APIs are actually
+# more efficient. So we want to use select() or poll().
+#
+# Now, how do we choose between select() and poll()? On traditional Unixes,
+# select() has a strange calling convention that makes it slow, or fail
+# altogether, for high-numbered file descriptors. The point of poll() is to fix
+# that, so on Unixes, we prefer poll().
+#
+# On Windows, there is no poll() (or at least Python doesn't provide a wrapper
+# for it), but that's OK, because on Windows, select() doesn't have this
+# strange calling convention; plain select() works fine.
+#
+# So: on Windows we use select(), and everywhere else we use poll(). We also
+# fall back to select() in case poll() is somehow broken or missing.
+
+if sys.version_info >= (3, 5):
+    # Modern Python, that retries syscalls by default
+    def _retry_on_intr(fn, timeout):
+        return fn(timeout)
+else:
+    # Old and broken Pythons.
+    def _retry_on_intr(fn, timeout):
+        if timeout is None:
+            deadline = float("inf")
+        else:
+            deadline = monotonic() + timeout
+
+        while True:
+            try:
+                return fn(timeout)
+            # OSError for 3 <= pyver < 3.5, select.error for pyver <= 2.7
+            except (OSError, select.error) as e:
+                # 'e.args[0]' incantation works for both OSError and select.error
+                if e.args[0] != errno.EINTR:
+                    raise
+                else:
+                    timeout = deadline - monotonic()
+                    if timeout < 0:
+                        timeout = 0
+                    if timeout == float("inf"):
+                        timeout = None
+                    continue
+
+
+def select_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    rcheck = []
+    wcheck = []
+    if read:
+        rcheck.append(sock)
+    if write:
+        wcheck.append(sock)
+    # When doing a non-blocking connect, most systems signal success by
+    # marking the socket writable. Windows, though, signals success by marked
+    # it as "exceptional". We paper over the difference by checking the write
+    # sockets for both conditions. (The stdlib selectors module does the same
+    # thing.)
+    fn = partial(select.select, rcheck, wcheck, wcheck)
+    rready, wready, xready = _retry_on_intr(fn, timeout)
+    return bool(rready or wready or xready)
+
+
+def poll_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    mask = 0
+    if read:
+        mask |= select.POLLIN
+    if write:
+        mask |= select.POLLOUT
+    poll_obj = select.poll()
+    poll_obj.register(sock, mask)
+
+    # For some reason, poll() takes timeout in milliseconds
+    def do_poll(t):
+        if t is not None:
+            t *= 1000
+        return poll_obj.poll(t)
+
+    return bool(_retry_on_intr(do_poll, timeout))
+
+
+def null_wait_for_socket(*args, **kwargs):
+    raise NoWayToWaitForSocketError("no select-equivalent available")
+
+
+def _have_working_poll():
+    # Apparently some systems have a select.poll that fails as soon as you try
+    # to use it, either due to strange configuration or broken monkeypatching
+    # from libraries like eventlet/greenlet.
+    try:
+        poll_obj = select.poll()
+        _retry_on_intr(poll_obj.poll, 0)
+    except (AttributeError, OSError):
+        return False
+    else:
+        return True
+
+
+def wait_for_socket(*args, **kwargs):
+    # We delay choosing which implementation to use until the first time we're
+    # called. We could do it at import time, but then we might make the wrong
+    # decision if someone goes wild with monkeypatching select.poll after
+    # we're imported.
+    global wait_for_socket
+    if _have_working_poll():
+        wait_for_socket = poll_wait_for_socket
+    elif hasattr(select, "select"):
+        wait_for_socket = select_wait_for_socket
+    else:  # Platform-specific: Appengine.
+        wait_for_socket = null_wait_for_socket
+    return wait_for_socket(*args, **kwargs)
+
+
+def wait_for_read(sock, timeout=None):
+    """ Waits for reading to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, read=True, timeout=timeout)
+
+
+def wait_for_write(sock, timeout=None):
+    """ Waits for writing to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, write=True, timeout=timeout)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__init__.py
new file mode 100644
index 00000000..d21d697c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__init__.py
@@ -0,0 +1,342 @@
+# coding: utf-8
+"""
+
+    webencodings
+    ~~~~~~~~~~~~
+
+    This is a Python implementation of the `WHATWG Encoding standard
+    <http://encoding.spec.whatwg.org/>`. See README for details.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+from .labels import LABELS
+
+
+VERSION = '0.5.1'
+
+
+# Some names in Encoding are not valid Python aliases. Remap these.
+PYTHON_NAMES = {
+    'iso-8859-8-i': 'iso-8859-8',
+    'x-mac-cyrillic': 'mac-cyrillic',
+    'macintosh': 'mac-roman',
+    'windows-874': 'cp874'}
+
+CACHE = {}
+
+
+def ascii_lower(string):
+    r"""Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.
+
+    :param string: An Unicode string.
+    :returns: A new Unicode string.
+
+    This is used for `ASCII case-insensitive
+    <http://encoding.spec.whatwg.org/#ascii-case-insensitive>`_
+    matching of encoding labels.
+    The same matching is also used, among other things,
+    for `CSS keywords <http://dev.w3.org/csswg/css-values/#keywords>`_.
+
+    This is different from the :meth:`~py:str.lower` method of Unicode strings
+    which also affect non-ASCII characters,
+    sometimes mapping them into the ASCII range:
+
+        >>> keyword = u'Bac\N{KELVIN SIGN}ground'
+        >>> assert keyword.lower() == u'background'
+        >>> assert ascii_lower(keyword) != keyword.lower()
+        >>> assert ascii_lower(keyword) == u'bac\N{KELVIN SIGN}ground'
+
+    """
+    # This turns out to be faster than unicode.translate()
+    return string.encode('utf8').lower().decode('utf8')
+
+
+def lookup(label):
+    """
+    Look for an encoding by its label.
+    This is the spec’s `get an encoding
+    <http://encoding.spec.whatwg.org/#concept-encoding-get>`_ algorithm.
+    Supported labels are listed there.
+
+    :param label: A string.
+    :returns:
+        An :class:`Encoding` object, or :obj:`None` for an unknown label.
+
+    """
+    # Only strip ASCII whitespace: U+0009, U+000A, U+000C, U+000D, and U+0020.
+    label = ascii_lower(label.strip('\t\n\f\r '))
+    name = LABELS.get(label)
+    if name is None:
+        return None
+    encoding = CACHE.get(name)
+    if encoding is None:
+        if name == 'x-user-defined':
+            from .x_user_defined import codec_info
+        else:
+            python_name = PYTHON_NAMES.get(name, name)
+            # Any python_name value that gets to here should be valid.
+            codec_info = codecs.lookup(python_name)
+        encoding = Encoding(name, codec_info)
+        CACHE[name] = encoding
+    return encoding
+
+
+def _get_encoding(encoding_or_label):
+    """
+    Accept either an encoding object or label.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :returns: An :class:`Encoding` object.
+    :raises: :exc:`~exceptions.LookupError` for an unknown label.
+
+    """
+    if hasattr(encoding_or_label, 'codec_info'):
+        return encoding_or_label
+
+    encoding = lookup(encoding_or_label)
+    if encoding is None:
+        raise LookupError('Unknown encoding label: %r' % encoding_or_label)
+    return encoding
+
+
+class Encoding(object):
+    """Reresents a character encoding such as UTF-8,
+    that can be used for decoding or encoding.
+
+    .. attribute:: name
+
+        Canonical name of the encoding
+
+    .. attribute:: codec_info
+
+        The actual implementation of the encoding,
+        a stdlib :class:`~codecs.CodecInfo` object.
+        See :func:`codecs.register`.
+
+    """
+    def __init__(self, name, codec_info):
+        self.name = name
+        self.codec_info = codec_info
+
+    def __repr__(self):
+        return '<Encoding %s>' % self.name
+
+
+#: The UTF-8 encoding. Should be used for new content and formats.
+UTF8 = lookup('utf-8')
+
+_UTF16LE = lookup('utf-16le')
+_UTF16BE = lookup('utf-16be')
+
+
+def decode(input, fallback_encoding, errors='replace'):
+    """
+    Decode a single string.
+
+    :param input: A byte string
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return:
+        A ``(output, encoding)`` tuple of an Unicode string
+        and an :obj:`Encoding`.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    fallback_encoding = _get_encoding(fallback_encoding)
+    bom_encoding, input = _detect_bom(input)
+    encoding = bom_encoding or fallback_encoding
+    return encoding.codec_info.decode(input, errors)[0], encoding
+
+
+def _detect_bom(input):
+    """Return (bom_encoding, input), with any BOM removed from the input."""
+    if input.startswith(b'\xFF\xFE'):
+        return _UTF16LE, input[2:]
+    if input.startswith(b'\xFE\xFF'):
+        return _UTF16BE, input[2:]
+    if input.startswith(b'\xEF\xBB\xBF'):
+        return UTF8, input[3:]
+    return None, input
+
+
+def encode(input, encoding=UTF8, errors='strict'):
+    """
+    Encode a single string.
+
+    :param input: An Unicode string.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return: A byte string.
+
+    """
+    return _get_encoding(encoding).codec_info.encode(input, errors)[0]
+
+
+def iter_decode(input, fallback_encoding, errors='replace'):
+    """
+    "Pull"-based decoder.
+
+    :param input:
+        An iterable of byte strings.
+
+        The input is first consumed just enough to determine the encoding
+        based on the precense of a BOM,
+        then consumed on demand when the return value is.
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns:
+        An ``(output, encoding)`` tuple.
+        :obj:`output` is an iterable of Unicode strings,
+        :obj:`encoding` is the :obj:`Encoding` that is being used.
+
+    """
+
+    decoder = IncrementalDecoder(fallback_encoding, errors)
+    generator = _iter_decode_generator(input, decoder)
+    encoding = next(generator)
+    return generator, encoding
+
+
+def _iter_decode_generator(input, decoder):
+    """Return a generator that first yields the :obj:`Encoding`,
+    then yields output chukns as Unicode strings.
+
+    """
+    decode = decoder.decode
+    input = iter(input)
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            assert decoder.encoding is not None
+            yield decoder.encoding
+            yield output
+            break
+    else:
+        # Input exhausted without determining the encoding
+        output = decode(b'', final=True)
+        assert decoder.encoding is not None
+        yield decoder.encoding
+        if output:
+            yield output
+        return
+
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            yield output
+    output = decode(b'', final=True)
+    if output:
+        yield output
+
+
+def iter_encode(input, encoding=UTF8, errors='strict'):
+    """
+    “Pull”-based encoder.
+
+    :param input: An iterable of Unicode strings.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns: An iterable of byte strings.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    encode = IncrementalEncoder(encoding, errors).encode
+    return _iter_encode_generator(input, encode)
+
+
+def _iter_encode_generator(input, encode):
+    for chunck in input:
+        output = encode(chunck)
+        if output:
+            yield output
+    output = encode('', final=True)
+    if output:
+        yield output
+
+
+class IncrementalDecoder(object):
+    """
+    “Push”-based decoder.
+
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    """
+    def __init__(self, fallback_encoding, errors='replace'):
+        # Fail early if `encoding` is an invalid label.
+        self._fallback_encoding = _get_encoding(fallback_encoding)
+        self._errors = errors
+        self._buffer = b''
+        self._decoder = None
+        #: The actual :class:`Encoding` that is being used,
+        #: or :obj:`None` if that is not determined yet.
+        #: (Ie. if there is not enough input yet to determine
+        #: if there is a BOM.)
+        self.encoding = None  # Not known yet.
+
+    def decode(self, input, final=False):
+        """Decode one chunk of the input.
+
+        :param input: A byte string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: An Unicode string.
+
+        """
+        decoder = self._decoder
+        if decoder is not None:
+            return decoder(input, final)
+
+        input = self._buffer + input
+        encoding, input = _detect_bom(input)
+        if encoding is None:
+            if len(input) < 3 and not final:  # Not enough data yet.
+                self._buffer = input
+                return ''
+            else:  # No BOM
+                encoding = self._fallback_encoding
+        decoder = encoding.codec_info.incrementaldecoder(self._errors).decode
+        self._decoder = decoder
+        self.encoding = encoding
+        return decoder(input, final)
+
+
+class IncrementalEncoder(object):
+    """
+    “Push”-based encoder.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    .. method:: encode(input, final=False)
+
+        :param input: An Unicode string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: A byte string.
+
+    """
+    def __init__(self, encoding=UTF8, errors='strict'):
+        encoding = _get_encoding(encoding)
+        self.encode = encoding.codec_info.incrementalencoder(errors).encode
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..2bfe6909
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-37.pyc
new file mode 100644
index 00000000..55863c8b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-37.pyc
new file mode 100644
index 00000000..5f5e37c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-37.pyc
new file mode 100644
index 00000000..b67d7809
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-37.pyc
new file mode 100644
index 00000000..f49e7ebf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/labels.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/labels.py
new file mode 100644
index 00000000..29cbf91e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/labels.py
@@ -0,0 +1,231 @@
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+    'unicode-1-1-utf-8':   'utf-8',
+    'utf-8':               'utf-8',
+    'utf8':                'utf-8',
+    '866':                 'ibm866',
+    'cp866':               'ibm866',
+    'csibm866':            'ibm866',
+    'ibm866':              'ibm866',
+    'csisolatin2':         'iso-8859-2',
+    'iso-8859-2':          'iso-8859-2',
+    'iso-ir-101':          'iso-8859-2',
+    'iso8859-2':           'iso-8859-2',
+    'iso88592':            'iso-8859-2',
+    'iso_8859-2':          'iso-8859-2',
+    'iso_8859-2:1987':     'iso-8859-2',
+    'l2':                  'iso-8859-2',
+    'latin2':              'iso-8859-2',
+    'csisolatin3':         'iso-8859-3',
+    'iso-8859-3':          'iso-8859-3',
+    'iso-ir-109':          'iso-8859-3',
+    'iso8859-3':           'iso-8859-3',
+    'iso88593':            'iso-8859-3',
+    'iso_8859-3':          'iso-8859-3',
+    'iso_8859-3:1988':     'iso-8859-3',
+    'l3':                  'iso-8859-3',
+    'latin3':              'iso-8859-3',
+    'csisolatin4':         'iso-8859-4',
+    'iso-8859-4':          'iso-8859-4',
+    'iso-ir-110':          'iso-8859-4',
+    'iso8859-4':           'iso-8859-4',
+    'iso88594':            'iso-8859-4',
+    'iso_8859-4':          'iso-8859-4',
+    'iso_8859-4:1988':     'iso-8859-4',
+    'l4':                  'iso-8859-4',
+    'latin4':              'iso-8859-4',
+    'csisolatincyrillic':  'iso-8859-5',
+    'cyrillic':            'iso-8859-5',
+    'iso-8859-5':          'iso-8859-5',
+    'iso-ir-144':          'iso-8859-5',
+    'iso8859-5':           'iso-8859-5',
+    'iso88595':            'iso-8859-5',
+    'iso_8859-5':          'iso-8859-5',
+    'iso_8859-5:1988':     'iso-8859-5',
+    'arabic':              'iso-8859-6',
+    'asmo-708':            'iso-8859-6',
+    'csiso88596e':         'iso-8859-6',
+    'csiso88596i':         'iso-8859-6',
+    'csisolatinarabic':    'iso-8859-6',
+    'ecma-114':            'iso-8859-6',
+    'iso-8859-6':          'iso-8859-6',
+    'iso-8859-6-e':        'iso-8859-6',
+    'iso-8859-6-i':        'iso-8859-6',
+    'iso-ir-127':          'iso-8859-6',
+    'iso8859-6':           'iso-8859-6',
+    'iso88596':            'iso-8859-6',
+    'iso_8859-6':          'iso-8859-6',
+    'iso_8859-6:1987':     'iso-8859-6',
+    'csisolatingreek':     'iso-8859-7',
+    'ecma-118':            'iso-8859-7',
+    'elot_928':            'iso-8859-7',
+    'greek':               'iso-8859-7',
+    'greek8':              'iso-8859-7',
+    'iso-8859-7':          'iso-8859-7',
+    'iso-ir-126':          'iso-8859-7',
+    'iso8859-7':           'iso-8859-7',
+    'iso88597':            'iso-8859-7',
+    'iso_8859-7':          'iso-8859-7',
+    'iso_8859-7:1987':     'iso-8859-7',
+    'sun_eu_greek':        'iso-8859-7',
+    'csiso88598e':         'iso-8859-8',
+    'csisolatinhebrew':    'iso-8859-8',
+    'hebrew':              'iso-8859-8',
+    'iso-8859-8':          'iso-8859-8',
+    'iso-8859-8-e':        'iso-8859-8',
+    'iso-ir-138':          'iso-8859-8',
+    'iso8859-8':           'iso-8859-8',
+    'iso88598':            'iso-8859-8',
+    'iso_8859-8':          'iso-8859-8',
+    'iso_8859-8:1988':     'iso-8859-8',
+    'visual':              'iso-8859-8',
+    'csiso88598i':         'iso-8859-8-i',
+    'iso-8859-8-i':        'iso-8859-8-i',
+    'logical':             'iso-8859-8-i',
+    'csisolatin6':         'iso-8859-10',
+    'iso-8859-10':         'iso-8859-10',
+    'iso-ir-157':          'iso-8859-10',
+    'iso8859-10':          'iso-8859-10',
+    'iso885910':           'iso-8859-10',
+    'l6':                  'iso-8859-10',
+    'latin6':              'iso-8859-10',
+    'iso-8859-13':         'iso-8859-13',
+    'iso8859-13':          'iso-8859-13',
+    'iso885913':           'iso-8859-13',
+    'iso-8859-14':         'iso-8859-14',
+    'iso8859-14':          'iso-8859-14',
+    'iso885914':           'iso-8859-14',
+    'csisolatin9':         'iso-8859-15',
+    'iso-8859-15':         'iso-8859-15',
+    'iso8859-15':          'iso-8859-15',
+    'iso885915':           'iso-8859-15',
+    'iso_8859-15':         'iso-8859-15',
+    'l9':                  'iso-8859-15',
+    'iso-8859-16':         'iso-8859-16',
+    'cskoi8r':             'koi8-r',
+    'koi':                 'koi8-r',
+    'koi8':                'koi8-r',
+    'koi8-r':              'koi8-r',
+    'koi8_r':              'koi8-r',
+    'koi8-u':              'koi8-u',
+    'csmacintosh':         'macintosh',
+    'mac':                 'macintosh',
+    'macintosh':           'macintosh',
+    'x-mac-roman':         'macintosh',
+    'dos-874':             'windows-874',
+    'iso-8859-11':         'windows-874',
+    'iso8859-11':          'windows-874',
+    'iso885911':           'windows-874',
+    'tis-620':             'windows-874',
+    'windows-874':         'windows-874',
+    'cp1250':              'windows-1250',
+    'windows-1250':        'windows-1250',
+    'x-cp1250':            'windows-1250',
+    'cp1251':              'windows-1251',
+    'windows-1251':        'windows-1251',
+    'x-cp1251':            'windows-1251',
+    'ansi_x3.4-1968':      'windows-1252',
+    'ascii':               'windows-1252',
+    'cp1252':              'windows-1252',
+    'cp819':               'windows-1252',
+    'csisolatin1':         'windows-1252',
+    'ibm819':              'windows-1252',
+    'iso-8859-1':          'windows-1252',
+    'iso-ir-100':          'windows-1252',
+    'iso8859-1':           'windows-1252',
+    'iso88591':            'windows-1252',
+    'iso_8859-1':          'windows-1252',
+    'iso_8859-1:1987':     'windows-1252',
+    'l1':                  'windows-1252',
+    'latin1':              'windows-1252',
+    'us-ascii':            'windows-1252',
+    'windows-1252':        'windows-1252',
+    'x-cp1252':            'windows-1252',
+    'cp1253':              'windows-1253',
+    'windows-1253':        'windows-1253',
+    'x-cp1253':            'windows-1253',
+    'cp1254':              'windows-1254',
+    'csisolatin5':         'windows-1254',
+    'iso-8859-9':          'windows-1254',
+    'iso-ir-148':          'windows-1254',
+    'iso8859-9':           'windows-1254',
+    'iso88599':            'windows-1254',
+    'iso_8859-9':          'windows-1254',
+    'iso_8859-9:1989':     'windows-1254',
+    'l5':                  'windows-1254',
+    'latin5':              'windows-1254',
+    'windows-1254':        'windows-1254',
+    'x-cp1254':            'windows-1254',
+    'cp1255':              'windows-1255',
+    'windows-1255':        'windows-1255',
+    'x-cp1255':            'windows-1255',
+    'cp1256':              'windows-1256',
+    'windows-1256':        'windows-1256',
+    'x-cp1256':            'windows-1256',
+    'cp1257':              'windows-1257',
+    'windows-1257':        'windows-1257',
+    'x-cp1257':            'windows-1257',
+    'cp1258':              'windows-1258',
+    'windows-1258':        'windows-1258',
+    'x-cp1258':            'windows-1258',
+    'x-mac-cyrillic':      'x-mac-cyrillic',
+    'x-mac-ukrainian':     'x-mac-cyrillic',
+    'chinese':             'gbk',
+    'csgb2312':            'gbk',
+    'csiso58gb231280':     'gbk',
+    'gb2312':              'gbk',
+    'gb_2312':             'gbk',
+    'gb_2312-80':          'gbk',
+    'gbk':                 'gbk',
+    'iso-ir-58':           'gbk',
+    'x-gbk':               'gbk',
+    'gb18030':             'gb18030',
+    'hz-gb-2312':          'hz-gb-2312',
+    'big5':                'big5',
+    'big5-hkscs':          'big5',
+    'cn-big5':             'big5',
+    'csbig5':              'big5',
+    'x-x-big5':            'big5',
+    'cseucpkdfmtjapanese': 'euc-jp',
+    'euc-jp':              'euc-jp',
+    'x-euc-jp':            'euc-jp',
+    'csiso2022jp':         'iso-2022-jp',
+    'iso-2022-jp':         'iso-2022-jp',
+    'csshiftjis':          'shift_jis',
+    'ms_kanji':            'shift_jis',
+    'shift-jis':           'shift_jis',
+    'shift_jis':           'shift_jis',
+    'sjis':                'shift_jis',
+    'windows-31j':         'shift_jis',
+    'x-sjis':              'shift_jis',
+    'cseuckr':             'euc-kr',
+    'csksc56011987':       'euc-kr',
+    'euc-kr':              'euc-kr',
+    'iso-ir-149':          'euc-kr',
+    'korean':              'euc-kr',
+    'ks_c_5601-1987':      'euc-kr',
+    'ks_c_5601-1989':      'euc-kr',
+    'ksc5601':             'euc-kr',
+    'ksc_5601':            'euc-kr',
+    'windows-949':         'euc-kr',
+    'csiso2022kr':         'iso-2022-kr',
+    'iso-2022-kr':         'iso-2022-kr',
+    'utf-16be':            'utf-16be',
+    'utf-16':              'utf-16le',
+    'utf-16le':            'utf-16le',
+    'x-user-defined':      'x-user-defined',
+}
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/mklabels.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/mklabels.py
new file mode 100644
index 00000000..295dc928
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/mklabels.py
@@ -0,0 +1,59 @@
+"""
+
+    webencodings.mklabels
+    ~~~~~~~~~~~~~~~~~~~~~
+
+    Regenarate the webencodings.labels module.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+import json
+try:
+    from urllib import urlopen
+except ImportError:
+    from urllib.request import urlopen
+
+
+def assert_lower(string):
+    assert string == string.lower()
+    return string
+
+
+def generate(url):
+    parts = ['''\
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+''']
+    labels = [
+        (repr(assert_lower(label)).lstrip('u'),
+         repr(encoding['name']).lstrip('u'))
+        for category in json.loads(urlopen(url).read().decode('ascii'))
+        for encoding in category['encodings']
+        for label in encoding['labels']]
+    max_len = max(len(label) for label, name in labels)
+    parts.extend(
+        '    %s:%s %s,\n' % (label, ' ' * (max_len - len(label)), name)
+        for label, name in labels)
+    parts.append('}')
+    return ''.join(parts)
+
+
+if __name__ == '__main__':
+    print(generate('http://encoding.spec.whatwg.org/encodings.json'))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/tests.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/tests.py
new file mode 100644
index 00000000..e12c10d0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/tests.py
@@ -0,0 +1,153 @@
+# coding: utf-8
+"""
+
+    webencodings.tests
+    ~~~~~~~~~~~~~~~~~~
+
+    A basic test suite for Encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+from . import (lookup, LABELS, decode, encode, iter_decode, iter_encode,
+               IncrementalDecoder, IncrementalEncoder, UTF8)
+
+
+def assert_raises(exception, function, *args, **kwargs):
+    try:
+        function(*args, **kwargs)
+    except exception:
+        return
+    else:  # pragma: no cover
+        raise AssertionError('Did not raise %s.' % exception)
+
+
+def test_labels():
+    assert lookup('utf-8').name == 'utf-8'
+    assert lookup('Utf-8').name == 'utf-8'
+    assert lookup('UTF-8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8 ').name == 'utf-8'
+    assert lookup(' \r\nutf8\t').name == 'utf-8'
+    assert lookup('u8') is None  # Python label.
+    assert lookup('utf-8 ') is None  # Non-ASCII white space.
+
+    assert lookup('US-ASCII').name == 'windows-1252'
+    assert lookup('iso-8859-1').name == 'windows-1252'
+    assert lookup('latin1').name == 'windows-1252'
+    assert lookup('LATIN1').name == 'windows-1252'
+    assert lookup('latin-1') is None
+    assert lookup('LATİN1') is None  # ASCII-only case insensitivity.
+
+
+def test_all_labels():
+    for label in LABELS:
+        assert decode(b'', label) == ('', lookup(label))
+        assert encode('', label) == b''
+        for repeat in [0, 1, 12]:
+            output, _ = iter_decode([b''] * repeat, label)
+            assert list(output) == []
+            assert list(iter_encode([''] * repeat, label)) == []
+        decoder = IncrementalDecoder(label)
+        assert decoder.decode(b'') == ''
+        assert decoder.decode(b'', final=True) == ''
+        encoder = IncrementalEncoder(label)
+        assert encoder.encode('') == b''
+        assert encoder.encode('', final=True) == b''
+    # All encoding names are valid labels too:
+    for name in set(LABELS.values()):
+        assert lookup(name).name == name
+
+
+def test_invalid_label():
+    assert_raises(LookupError, decode, b'\xEF\xBB\xBF\xc3\xa9', 'invalid')
+    assert_raises(LookupError, encode, 'é', 'invalid')
+    assert_raises(LookupError, iter_decode, [], 'invalid')
+    assert_raises(LookupError, iter_encode, [], 'invalid')
+    assert_raises(LookupError, IncrementalDecoder, 'invalid')
+    assert_raises(LookupError, IncrementalEncoder, 'invalid')
+
+
+def test_decode():
+    assert decode(b'\x80', 'latin1') == ('€', lookup('latin1'))
+    assert decode(b'\x80', lookup('latin1')) == ('€', lookup('latin1'))
+    assert decode(b'\xc3\xa9', 'utf8') == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', UTF8) == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', 'ascii') == ('é', lookup('ascii'))
+    assert decode(b'\xEF\xBB\xBF\xc3\xa9', 'ascii') == ('é', lookup('utf8'))  # UTF-8 with BOM
+
+    assert decode(b'\xFE\xFF\x00\xe9', 'ascii') == ('é', lookup('utf-16be'))  # UTF-16-BE with BOM
+    assert decode(b'\xFF\xFE\xe9\x00', 'ascii') == ('é', lookup('utf-16le'))  # UTF-16-LE with BOM
+    assert decode(b'\xFE\xFF\xe9\x00', 'ascii') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\xFF\xFE\x00\xe9', 'ascii') == ('\ue900', lookup('utf-16le'))
+
+    assert decode(b'\x00\xe9', 'UTF-16BE') == ('é', lookup('utf-16be'))
+    assert decode(b'\xe9\x00', 'UTF-16LE') == ('é', lookup('utf-16le'))
+    assert decode(b'\xe9\x00', 'UTF-16') == ('é', lookup('utf-16le'))
+
+    assert decode(b'\xe9\x00', 'UTF-16BE') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\x00\xe9', 'UTF-16LE') == ('\ue900', lookup('utf-16le'))
+    assert decode(b'\x00\xe9', 'UTF-16') == ('\ue900', lookup('utf-16le'))
+
+
+def test_encode():
+    assert encode('é', 'latin1') == b'\xe9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf-16') == b'\xe9\x00'
+    assert encode('é', 'utf-16le') == b'\xe9\x00'
+    assert encode('é', 'utf-16be') == b'\x00\xe9'
+
+
+def test_iter_decode():
+    def iter_decode_to_string(input, fallback_encoding):
+        output, _encoding = iter_decode(input, fallback_encoding)
+        return ''.join(output)
+    assert iter_decode_to_string([], 'latin1') == ''
+    assert iter_decode_to_string([b''], 'latin1') == ''
+    assert iter_decode_to_string([b'\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'hello'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'he', b'llo'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'hell', b'o'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'\xc3\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF\xc3\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'a', b'\xc3'], 'latin1') == 'a\uFFFD'
+    assert iter_decode_to_string([
+        b'', b'\xEF', b'', b'', b'\xBB\xBF\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF'], 'latin1') == ''
+    assert iter_decode_to_string([b'\xEF\xBB'], 'latin1') == 'ï»'
+    assert iter_decode_to_string([b'\xFE\xFF\x00\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xFF\xFE\xe9\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'\xFF', b'', b'', b'\xFE\xe9', b'\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'h\xe9', b'llo'], 'x-user-defined') == 'h\uF7E9llo'
+
+
+def test_iter_encode():
+    assert b''.join(iter_encode([], 'latin1')) == b''
+    assert b''.join(iter_encode([''], 'latin1')) == b''
+    assert b''.join(iter_encode(['é'], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16le')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16be')) == b'\x00\xe9'
+    assert b''.join(iter_encode([
+        '', 'h\uF7E9', '', 'llo'], 'x-user-defined')) == b'h\xe9llo'
+
+
+def test_x_user_defined():
+    encoded = b'2,\x0c\x0b\x1aO\xd9#\xcb\x0f\xc9\xbbt\xcf\xa8\xca'
+    decoded = '2,\x0c\x0b\x1aO\uf7d9#\uf7cb\x0f\uf7c9\uf7bbt\uf7cf\uf7a8\uf7ca'
+    encoded = b'aa'
+    decoded = 'aa'
+    assert decode(encoded, 'x-user-defined') == (decoded, lookup('x-user-defined'))
+    assert encode(decoded, 'x-user-defined') == encoded
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/x_user_defined.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/x_user_defined.py
new file mode 100644
index 00000000..d16e3260
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pip/_vendor/webencodings/x_user_defined.py
@@ -0,0 +1,325 @@
+# coding: utf-8
+"""
+
+    webencodings.x_user_defined
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    An implementation of the x-user-defined encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+
+### Codec APIs
+
+class Codec(codecs.Codec):
+
+    def encode(self, input, errors='strict'):
+        return codecs.charmap_encode(input, errors, encoding_table)
+
+    def decode(self, input, errors='strict'):
+        return codecs.charmap_decode(input, errors, decoding_table)
+
+
+class IncrementalEncoder(codecs.IncrementalEncoder):
+    def encode(self, input, final=False):
+        return codecs.charmap_encode(input, self.errors, encoding_table)[0]
+
+
+class IncrementalDecoder(codecs.IncrementalDecoder):
+    def decode(self, input, final=False):
+        return codecs.charmap_decode(input, self.errors, decoding_table)[0]
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+
+### encodings module API
+
+codec_info = codecs.CodecInfo(
+    name='x-user-defined',
+    encode=Codec().encode,
+    decode=Codec().decode,
+    incrementalencoder=IncrementalEncoder,
+    incrementaldecoder=IncrementalDecoder,
+    streamreader=StreamReader,
+    streamwriter=StreamWriter,
+)
+
+
+### Decoding Table
+
+# Python 3:
+# for c in range(256): print('    %r' % chr(c if c < 128 else c + 0xF700))
+decoding_table = (
+    '\x00'
+    '\x01'
+    '\x02'
+    '\x03'
+    '\x04'
+    '\x05'
+    '\x06'
+    '\x07'
+    '\x08'
+    '\t'
+    '\n'
+    '\x0b'
+    '\x0c'
+    '\r'
+    '\x0e'
+    '\x0f'
+    '\x10'
+    '\x11'
+    '\x12'
+    '\x13'
+    '\x14'
+    '\x15'
+    '\x16'
+    '\x17'
+    '\x18'
+    '\x19'
+    '\x1a'
+    '\x1b'
+    '\x1c'
+    '\x1d'
+    '\x1e'
+    '\x1f'
+    ' '
+    '!'
+    '"'
+    '#'
+    '$'
+    '%'
+    '&'
+    "'"
+    '('
+    ')'
+    '*'
+    '+'
+    ','
+    '-'
+    '.'
+    '/'
+    '0'
+    '1'
+    '2'
+    '3'
+    '4'
+    '5'
+    '6'
+    '7'
+    '8'
+    '9'
+    ':'
+    ';'
+    '<'
+    '='
+    '>'
+    '?'
+    '@'
+    'A'
+    'B'
+    'C'
+    'D'
+    'E'
+    'F'
+    'G'
+    'H'
+    'I'
+    'J'
+    'K'
+    'L'
+    'M'
+    'N'
+    'O'
+    'P'
+    'Q'
+    'R'
+    'S'
+    'T'
+    'U'
+    'V'
+    'W'
+    'X'
+    'Y'
+    'Z'
+    '['
+    '\\'
+    ']'
+    '^'
+    '_'
+    '`'
+    'a'
+    'b'
+    'c'
+    'd'
+    'e'
+    'f'
+    'g'
+    'h'
+    'i'
+    'j'
+    'k'
+    'l'
+    'm'
+    'n'
+    'o'
+    'p'
+    'q'
+    'r'
+    's'
+    't'
+    'u'
+    'v'
+    'w'
+    'x'
+    'y'
+    'z'
+    '{'
+    '|'
+    '}'
+    '~'
+    '\x7f'
+    '\uf780'
+    '\uf781'
+    '\uf782'
+    '\uf783'
+    '\uf784'
+    '\uf785'
+    '\uf786'
+    '\uf787'
+    '\uf788'
+    '\uf789'
+    '\uf78a'
+    '\uf78b'
+    '\uf78c'
+    '\uf78d'
+    '\uf78e'
+    '\uf78f'
+    '\uf790'
+    '\uf791'
+    '\uf792'
+    '\uf793'
+    '\uf794'
+    '\uf795'
+    '\uf796'
+    '\uf797'
+    '\uf798'
+    '\uf799'
+    '\uf79a'
+    '\uf79b'
+    '\uf79c'
+    '\uf79d'
+    '\uf79e'
+    '\uf79f'
+    '\uf7a0'
+    '\uf7a1'
+    '\uf7a2'
+    '\uf7a3'
+    '\uf7a4'
+    '\uf7a5'
+    '\uf7a6'
+    '\uf7a7'
+    '\uf7a8'
+    '\uf7a9'
+    '\uf7aa'
+    '\uf7ab'
+    '\uf7ac'
+    '\uf7ad'
+    '\uf7ae'
+    '\uf7af'
+    '\uf7b0'
+    '\uf7b1'
+    '\uf7b2'
+    '\uf7b3'
+    '\uf7b4'
+    '\uf7b5'
+    '\uf7b6'
+    '\uf7b7'
+    '\uf7b8'
+    '\uf7b9'
+    '\uf7ba'
+    '\uf7bb'
+    '\uf7bc'
+    '\uf7bd'
+    '\uf7be'
+    '\uf7bf'
+    '\uf7c0'
+    '\uf7c1'
+    '\uf7c2'
+    '\uf7c3'
+    '\uf7c4'
+    '\uf7c5'
+    '\uf7c6'
+    '\uf7c7'
+    '\uf7c8'
+    '\uf7c9'
+    '\uf7ca'
+    '\uf7cb'
+    '\uf7cc'
+    '\uf7cd'
+    '\uf7ce'
+    '\uf7cf'
+    '\uf7d0'
+    '\uf7d1'
+    '\uf7d2'
+    '\uf7d3'
+    '\uf7d4'
+    '\uf7d5'
+    '\uf7d6'
+    '\uf7d7'
+    '\uf7d8'
+    '\uf7d9'
+    '\uf7da'
+    '\uf7db'
+    '\uf7dc'
+    '\uf7dd'
+    '\uf7de'
+    '\uf7df'
+    '\uf7e0'
+    '\uf7e1'
+    '\uf7e2'
+    '\uf7e3'
+    '\uf7e4'
+    '\uf7e5'
+    '\uf7e6'
+    '\uf7e7'
+    '\uf7e8'
+    '\uf7e9'
+    '\uf7ea'
+    '\uf7eb'
+    '\uf7ec'
+    '\uf7ed'
+    '\uf7ee'
+    '\uf7ef'
+    '\uf7f0'
+    '\uf7f1'
+    '\uf7f2'
+    '\uf7f3'
+    '\uf7f4'
+    '\uf7f5'
+    '\uf7f6'
+    '\uf7f7'
+    '\uf7f8'
+    '\uf7f9'
+    '\uf7fa'
+    '\uf7fb'
+    '\uf7fc'
+    '\uf7fd'
+    '\uf7fe'
+    '\uf7ff'
+)
+
+### Encoding table
+encoding_table = codecs.charmap_build(decoding_table)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__init__.py
new file mode 100644
index 00000000..97e08d68
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__init__.py
@@ -0,0 +1,3286 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pkg_resources.extern import six
+from pkg_resources.extern.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pkg_resources.extern import appdirs
+from pkg_resources.extern import packaging
+__import__('pkg_resources.extern.packaging.version')
+__import__('pkg_resources.extern.packaging.specifiers')
+__import__('pkg_resources.extern.packaging.requirements')
+__import__('pkg_resources.extern.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 4):
+    raise RuntimeError("Python 3.4 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = sys.version[:3]
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or appdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        value = self._get(self._fn(self.egg_info, name))
+        return value.decode('utf-8') if six.PY3 else value
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..25be3bed
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/py31compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/py31compat.cpython-37.pyc
new file mode 100644
index 00000000..623620f8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/__pycache__/py31compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..ea52e968
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/appdirs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/appdirs.cpython-37.pyc
new file mode 100644
index 00000000..47c93873
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/appdirs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/pyparsing.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/pyparsing.cpython-37.pyc
new file mode 100644
index 00000000..ecd2300d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/pyparsing.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/six.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/six.cpython-37.pyc
new file mode 100644
index 00000000..40bb47c5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/__pycache__/six.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/appdirs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/appdirs.py
new file mode 100644
index 00000000..ae67001a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/appdirs.py
@@ -0,0 +1,608 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2005-2010 ActiveState Software Inc.
+# Copyright (c) 2013 Eddy Petrișor
+
+"""Utilities for determining application-specific dirs.
+
+See <http://github.com/ActiveState/appdirs> for details and usage.
+"""
+# Dev Notes:
+# - MSDN on where to store app data files:
+#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
+# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
+# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+__version_info__ = (1, 4, 3)
+__version__ = '.'.join(map(str, __version_info__))
+
+
+import sys
+import os
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    unicode = str
+
+if sys.platform.startswith('java'):
+    import platform
+    os_name = platform.java_ver()[3][0]
+    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
+        system = 'win32'
+    elif os_name.startswith('Mac'): # "Mac OS X", etc.
+        system = 'darwin'
+    else: # "Linux", "SunOS", "FreeBSD", etc.
+        # Setting this to "linux2" is not ideal, but only Windows or Mac
+        # are actually checked for and the rest of the module expects
+        # *sys.platform* style strings.
+        system = 'linux2'
+else:
+    system = sys.platform
+
+
+
+def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               ~/Library/Application Support/<AppName>
+        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
+        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
+        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(_get_win_folder(const))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Application Support/')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of data dirs should be
+            returned. By default, the first item from XDG_DATA_DIRS is
+            returned, or '/usr/local/share/<AppName>',
+            if XDG_DATA_DIRS is not set
+
+    Typical site data directories are:
+        Mac OS X:   /Library/Application Support/<AppName>
+        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
+        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
+
+    For Unix, this is using the $XDG_DATA_DIRS[0] default.
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('/Library/Application Support')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        # XDG default for $XDG_DATA_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_DATA_DIRS',
+                         os.pathsep.join(['/usr/local/share', '/usr/share']))
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+        return path
+
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user config directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of config dirs should be
+            returned. By default, the first item from XDG_CONFIG_DIRS is
+            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
+
+    Typical site config directories are:
+        Mac OS X:   same as site_data_dir
+        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
+                    $XDG_CONFIG_DIRS
+        Win *:      same as site_data_dir
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+
+    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system in ["win32", "darwin"]:
+        path = site_data_dir(appname, appauthor)
+        if appname and version:
+            path = os.path.join(path, version)
+    else:
+        # XDG default for $XDG_CONFIG_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+    return path
+
+
+def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Cache" to the base app data dir for Windows. See
+            discussion below.
+
+    Typical user cache directories are:
+        Mac OS X:   ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go in
+    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
+    app data dir (the default returned by `user_data_dir` above). Apps typically
+    put cache data somewhere *under* the given dir here. Some examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+            if opinion:
+                path = os.path.join(path, "Cache")
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Caches')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific state dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user state directories are:
+        Mac OS X:  same as user_data_dir
+        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
+        Win *:     same as user_data_dir
+
+    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
+    to extend the XDG spec and support $XDG_STATE_HOME.
+
+    That means, by default "~/.local/state/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific log dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Logs" to the base app data dir for Windows, and "log" to the
+            base cache dir for Unix. See discussion below.
+
+    Typical user log directories are:
+        Mac OS X:   ~/Library/Logs/<AppName>
+        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
+
+    On Windows the only suggestion in the MSDN docs is that local settings
+    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
+    examples of what some windows apps use for a logs dir.)
+
+    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
+    value for Windows and appends "log" to the user cache dir for Unix.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "darwin":
+        path = os.path.join(
+            os.path.expanduser('~/Library/Logs'),
+            appname)
+    elif system == "win32":
+        path = user_data_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "Logs")
+    else:
+        path = user_cache_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "log")
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+class AppDirs(object):
+    """Convenience wrapper for getting application dirs."""
+    def __init__(self, appname=None, appauthor=None, version=None,
+            roaming=False, multipath=False):
+        self.appname = appname
+        self.appauthor = appauthor
+        self.version = version
+        self.roaming = roaming
+        self.multipath = multipath
+
+    @property
+    def user_data_dir(self):
+        return user_data_dir(self.appname, self.appauthor,
+                             version=self.version, roaming=self.roaming)
+
+    @property
+    def site_data_dir(self):
+        return site_data_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_config_dir(self):
+        return user_config_dir(self.appname, self.appauthor,
+                               version=self.version, roaming=self.roaming)
+
+    @property
+    def site_config_dir(self):
+        return site_config_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_cache_dir(self):
+        return user_cache_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_state_dir(self):
+        return user_state_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_log_dir(self):
+        return user_log_dir(self.appname, self.appauthor,
+                            version=self.version)
+
+
+#---- internal support stuff
+
+def _get_win_folder_from_registry(csidl_name):
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    if PY3:
+      import winreg as _winreg
+    else:
+      import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
+    return dir
+
+
+def _get_win_folder_with_pywin32(csidl_name):
+    from win32com.shell import shellcon, shell
+    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
+    # Try to make this a unicode path because SHGetFolderPath does
+    # not return unicode strings when there is unicode data in the
+    # path.
+    try:
+        dir = unicode(dir)
+
+        # Downgrade to short path name if have highbit chars. See
+        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+        has_high_char = False
+        for c in dir:
+            if ord(c) > 255:
+                has_high_char = True
+                break
+        if has_high_char:
+            try:
+                import win32api
+                dir = win32api.GetShortPathName(dir)
+            except ImportError:
+                pass
+    except UnicodeError:
+        pass
+    return dir
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    import ctypes
+
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+def _get_win_folder_with_jna(csidl_name):
+    import array
+    from com.sun import jna
+    from com.sun.jna.platform import win32
+
+    buf_size = win32.WinDef.MAX_PATH * 2
+    buf = array.zeros('c', buf_size)
+    shell = win32.Shell32.INSTANCE
+    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
+    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in dir:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf = array.zeros('c', buf_size)
+        kernel = win32.Kernel32.INSTANCE
+        if kernel.GetShortPathName(dir, buf, buf_size):
+            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    return dir
+
+if system == "win32":
+    try:
+        import win32com.shell
+        _get_win_folder = _get_win_folder_with_pywin32
+    except ImportError:
+        try:
+            from ctypes import windll
+            _get_win_folder = _get_win_folder_with_ctypes
+        except ImportError:
+            try:
+                import com.sun.jna
+                _get_win_folder = _get_win_folder_with_jna
+            except ImportError:
+                _get_win_folder = _get_win_folder_from_registry
+
+
+#---- self test code
+
+if __name__ == "__main__":
+    appname = "MyApp"
+    appauthor = "MyCompany"
+
+    props = ("user_data_dir",
+             "user_config_dir",
+             "user_cache_dir",
+             "user_state_dir",
+             "user_log_dir",
+             "site_data_dir",
+             "site_config_dir")
+
+    print("-- app dirs %s --" % __version__)
+
+    print("-- app dirs (with optional 'version')")
+    dirs = AppDirs(appname, appauthor, version="1.0")
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = AppDirs(appname, appauthor)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = AppDirs(appname)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = AppDirs(appname, appauthor=False)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__about__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__about__.py
new file mode 100644
index 00000000..95d330ef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__about__.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "16.8"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2016 %s" % __author__
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__init__.py
new file mode 100644
index 00000000..5ee62202
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__init__.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__, __copyright__, __email__, __license__, __summary__, __title__,
+    __uri__, __version__
+)
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
new file mode 100644
index 00000000..794fec7f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..ce02e93a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
new file mode 100644
index 00000000..39dbed44
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
new file mode 100644
index 00000000..aefe08e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-37.pyc
new file mode 100644
index 00000000..b6e6bae0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
new file mode 100644
index 00000000..ac664abb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
new file mode 100644
index 00000000..ad31b83d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..35064cff
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-37.pyc
new file mode 100644
index 00000000..bbe22b8f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_compat.py
new file mode 100644
index 00000000..210bb80b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_compat.py
@@ -0,0 +1,30 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = str,
+else:
+    string_types = basestring,
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_structures.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_structures.py
new file mode 100644
index 00000000..ccc27861
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+NegativeInfinity = NegativeInfinity()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/markers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/markers.py
new file mode 100644
index 00000000..892e578e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/markers.py
@@ -0,0 +1,301 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from pkg_resources.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from pkg_resources.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker", "UndefinedComparison", "UndefinedEnvironmentName",
+    "Marker", "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version") |
+    L("platform_python_implementation") |
+    L("implementation_name") |
+    L("python_full_version") |
+    L("platform_release") |
+    L("platform_version") |
+    L("platform_machine") |
+    L("platform_system") |
+    L("python_version") |
+    L("sys_platform") |
+    L("os_name") |
+    L("os.name") |  # PEP-345
+    L("sys.platform") |  # PEP-345
+    L("platform.version") |  # PEP-345
+    L("platform.machine") |  # PEP-345
+    L("platform.python_implementation") |  # PEP-345
+    L("python_implementation") |  # undocumented setuptools legacy
+    L("extra")
+)
+ALIASES = {
+    'os.name': 'os_name',
+    'sys.platform': 'sys_platform',
+    'platform.version': 'platform_version',
+    'platform.machine': 'platform_machine',
+    'platform.python_implementation': 'platform_python_implementation',
+    'python_implementation': 'platform_python_implementation'
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") |
+    L("==") |
+    L(">=") |
+    L("<=") |
+    L("!=") |
+    L("~=") |
+    L(">") |
+    L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (isinstance(marker, list) and len(marker) == 1 and
+            isinstance(marker[0], (list, tuple))):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = '{0.major}.{0.minor}.{0.micro}'.format(info)
+    kind = info.releaselevel
+    if kind != 'final':
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, 'implementation'):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = '0'
+        implementation_name = ''
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc:e.loc + 8])
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/requirements.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/requirements.py
new file mode 100644
index 00000000..0c8c4a38
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/requirements.py
@@ -0,0 +1,127 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from pkg_resources.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from pkg_resources.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+from pkg_resources.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r'[^ ]+')("url")
+URL = (AT + URI)
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE),
+                       joinString=",", adjacent=False)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or '')
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start:t._original_end])
+)
+MARKER_SEPERATOR = SEMICOLON
+MARKER = MARKER_SEPERATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = \
+    NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                "Invalid requirement, parse error at \"{0!r}\"".format(
+                    requirement_string[e.loc:e.loc + 8]))
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if not (parsed_url.scheme and parsed_url.netloc) or (
+                    not parsed_url.scheme and not parsed_url.netloc):
+                raise InvalidRequirement("Invalid URL given")
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/specifiers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/specifiers.py
new file mode 100644
index 00000000..7f5a76cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/specifiers.py
@@ -0,0 +1,774 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(
+            self.__class__.__name__,
+            str(self),
+            pre,
+        )
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if (parsed_version.is_prerelease and not
+                        (prereleases or self.prereleases)):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the begining.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not
+                               x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return (self._get_operator(">=")(prospective, spec) and
+                self._get_operator("==")(prospective, prefix))
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[:len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is techincally greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]):])
+    right_split.append(right[len(right_split[0]):])
+
+    # Insert our padding
+    left_split.insert(
+        1,
+        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
+    )
+    right_split.insert(
+        1,
+        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
+    )
+
+    return (
+        list(itertools.chain(*left_split)),
+        list(itertools.chain(*right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(
+            s.contains(item, prereleases=prereleases)
+            for s in self._specs
+        )
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/utils.py
new file mode 100644
index 00000000..942387ce
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/utils.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/version.py
new file mode 100644
index 00000000..83b5ee8c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/version.py
@@ -0,0 +1,393 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = [
+    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
+]
+
+
+_Version = collections.namedtuple(
+    "_Version",
+    ["epoch", "release", "dev", "pre", "post", "local"],
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(
+    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
+)
+
+_legacy_version_replacement_map = {
+    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(
+        r"^\s*" + VERSION_PATTERN + r"\s*$",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(
+                match.group("pre_l"),
+                match.group("pre_n"),
+            ),
+            post=_parse_letter_version(
+                match.group("post_l"),
+                match.group("post_n1") or match.group("post_n2"),
+            ),
+            dev=_parse_letter_version(
+                match.group("dev_l"),
+                match.group("dev_n"),
+            ),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        # Pre-release
+        if self._version.pre is not None:
+            parts.append("".join(str(x) for x in self._version.pre))
+
+        # Post-release
+        if self._version.post is not None:
+            parts.append(".post{0}".format(self._version.post[1]))
+
+        # Development release
+        if self._version.dev is not None:
+            parts.append(".dev{0}".format(self._version.dev[1]))
+
+        # Local version segment
+        if self._version.local is not None:
+            parts.append(
+                "+{0}".format(".".join(str(x) for x in self._version.local))
+            )
+
+        return "".join(parts)
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        return "".join(parts)
+
+    @property
+    def local(self):
+        version_string = str(self)
+        if "+" in version_string:
+            return version_string.split("+", 1)[1]
+
+    @property
+    def is_prerelease(self):
+        return bool(self._version.dev or self._version.pre)
+
+    @property
+    def is_postrelease(self):
+        return bool(self._version.post)
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_seperators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_seperators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(
+            itertools.dropwhile(
+                lambda x: x == 0,
+                reversed(release),
+            )
+        ))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple(
+            (i, "") if isinstance(i, int) else (-Infinity, i)
+            for i in local
+        )
+
+    return epoch, release, pre, post, dev, local
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/pyparsing.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/pyparsing.py
new file mode 100644
index 00000000..cf75e1e5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py

+#

+# Copyright (c) 2003-2018  Paul T. McGuire

+#

+# Permission is hereby granted, free of charge, to any person obtaining

+# a copy of this software and associated documentation files (the

+# "Software"), to deal in the Software without restriction, including

+# without limitation the rights to use, copy, modify, merge, publish,

+# distribute, sublicense, and/or sell copies of the Software, and to

+# permit persons to whom the Software is furnished to do so, subject to

+# the following conditions:

+#

+# The above copyright notice and this permission notice shall be

+# included in all copies or substantial portions of the Software.

+#

+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+#

+

+__doc__ = \

+"""

+pyparsing module - Classes and methods to define and execute parsing grammars

+=============================================================================

+

+The pyparsing module is an alternative approach to creating and executing simple grammars,

+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you

+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module

+provides a library of classes that you use to construct the grammar directly in Python.

+

+Here is a program to parse "Hello, World!" (or any greeting of the form 

+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 

+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to

+L{Literal} expressions)::

+

+    from pyparsing import Word, alphas

+

+    # define grammar of a greeting

+    greet = Word(alphas) + "," + Word(alphas) + "!"

+

+    hello = "Hello, World!"

+    print (hello, "->", greet.parseString(hello))

+

+The program outputs the following::

+

+    Hello, World! -> ['Hello', ',', 'World', '!']

+

+The Python representation of the grammar is quite readable, owing to the self-explanatory

+class names, and the use of '+', '|' and '^' operators.

+

+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an

+object with named attributes.

+

+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:

+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)

+ - quoted strings

+ - embedded comments

+

+

+Getting Started -

+-----------------

+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing

+classes inherit from. Use the docstrings for examples of how to:

+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes

+ - construct character word-group expressions using the L{Word} class

+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes

+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones

+ - associate names with your parsed results using L{ParserElement.setResultsName}

+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}

+ - find more useful common expressions in the L{pyparsing_common} namespace class

+"""

+

+__version__ = "2.2.1"

+__versionTime__ = "18 Sep 2018 00:49 UTC"

+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"

+

+import string

+from weakref import ref as wkref

+import copy

+import sys

+import warnings

+import re

+import sre_constants

+import collections

+import pprint

+import traceback

+import types

+from datetime import datetime

+

+try:

+    from _thread import RLock

+except ImportError:

+    from threading import RLock

+

+try:

+    # Python 3

+    from collections.abc import Iterable

+    from collections.abc import MutableMapping

+except ImportError:

+    # Python 2.7

+    from collections import Iterable

+    from collections import MutableMapping

+

+try:

+    from collections import OrderedDict as _OrderedDict

+except ImportError:

+    try:

+        from ordereddict import OrderedDict as _OrderedDict

+    except ImportError:

+        _OrderedDict = None

+

+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )

+

+__all__ = [

+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',

+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',

+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',

+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',

+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',

+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 

+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',

+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',

+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',

+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',

+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',

+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',

+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',

+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 

+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',

+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',

+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',

+'CloseMatch', 'tokenMap', 'pyparsing_common',

+]

+

+system_version = tuple(sys.version_info)[:3]

+PY_3 = system_version[0] == 3

+if PY_3:

+    _MAX_INT = sys.maxsize

+    basestring = str

+    unichr = chr

+    _ustr = str

+

+    # build list of single arg builtins, that can be used as parse actions

+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]

+

+else:

+    _MAX_INT = sys.maxint

+    range = xrange

+

+    def _ustr(obj):

+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries

+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It

+           then < returns the unicode object | encodes it with the default encoding | ... >.

+        """

+        if isinstance(obj,unicode):

+            return obj

+

+        try:

+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so

+            # it won't break any existing code.

+            return str(obj)

+

+        except UnicodeEncodeError:

+            # Else encode it

+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')

+            xmlcharref = Regex(r'&#\d+;')

+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])

+            return xmlcharref.transformString(ret)

+

+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions

+    singleArgBuiltins = []

+    import __builtin__

+    for fname in "sum len sorted reversed list tuple set any all min max".split():

+        try:

+            singleArgBuiltins.append(getattr(__builtin__,fname))

+        except AttributeError:

+            continue

+            

+_generatorType = type((y for y in range(1)))

+ 

+def _xml_escape(data):

+    """Escape &, <, >, ", ', etc. in a string of data."""

+

+    # ampersand must be replaced first

+    from_symbols = '&><"\''

+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())

+    for from_,to_ in zip(from_symbols, to_symbols):

+        data = data.replace(from_, to_)

+    return data

+

+class _Constants(object):

+    pass

+

+alphas     = string.ascii_uppercase + string.ascii_lowercase

+nums       = "0123456789"

+hexnums    = nums + "ABCDEFabcdef"

+alphanums  = alphas + nums

+_bslash    = chr(92)

+printables = "".join(c for c in string.printable if c not in string.whitespace)

+

+class ParseBaseException(Exception):

+    """base exception class for all parsing runtime exceptions"""

+    # Performance tuning: we construct a *lot* of these, so keep this

+    # constructor as small and fast as possible

+    def __init__( self, pstr, loc=0, msg=None, elem=None ):

+        self.loc = loc

+        if msg is None:

+            self.msg = pstr

+            self.pstr = ""

+        else:

+            self.msg = msg

+            self.pstr = pstr

+        self.parserElement = elem

+        self.args = (pstr, loc, msg)

+

+    @classmethod

+    def _from_exception(cls, pe):

+        """

+        internal factory method to simplify creating one type of ParseException 

+        from another - avoids having __init__ signature conflicts among subclasses

+        """

+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)

+

+    def __getattr__( self, aname ):

+        """supported attributes by name are:

+            - lineno - returns the line number of the exception text

+            - col - returns the column number of the exception text

+            - line - returns the line containing the exception text

+        """

+        if( aname == "lineno" ):

+            return lineno( self.loc, self.pstr )

+        elif( aname in ("col", "column") ):

+            return col( self.loc, self.pstr )

+        elif( aname == "line" ):

+            return line( self.loc, self.pstr )

+        else:

+            raise AttributeError(aname)

+

+    def __str__( self ):

+        return "%s (at char %d), (line:%d, col:%d)" % \

+                ( self.msg, self.loc, self.lineno, self.column )

+    def __repr__( self ):

+        return _ustr(self)

+    def markInputline( self, markerString = ">!<" ):

+        """Extracts the exception line from the input string, and marks

+           the location of the exception with a special symbol.

+        """

+        line_str = self.line

+        line_column = self.column - 1

+        if markerString:

+            line_str = "".join((line_str[:line_column],

+                                markerString, line_str[line_column:]))

+        return line_str.strip()

+    def __dir__(self):

+        return "lineno col line".split() + dir(type(self))

+

+class ParseException(ParseBaseException):

+    """

+    Exception thrown when parse expressions don't match class;

+    supported attributes by name are:

+     - lineno - returns the line number of the exception text

+     - col - returns the column number of the exception text

+     - line - returns the line containing the exception text

+        

+    Example::

+        try:

+            Word(nums).setName("integer").parseString("ABC")

+        except ParseException as pe:

+            print(pe)

+            print("column: {}".format(pe.col))

+            

+    prints::

+       Expected integer (at char 0), (line:1, col:1)

+        column: 1

+    """

+    pass

+

+class ParseFatalException(ParseBaseException):

+    """user-throwable exception thrown when inconsistent parse content

+       is found; stops all parsing immediately"""

+    pass

+

+class ParseSyntaxException(ParseFatalException):

+    """just like L{ParseFatalException}, but thrown internally when an

+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 

+       immediately because an unbacktrackable syntax error has been found"""

+    pass

+

+#~ class ReparseException(ParseBaseException):

+    #~ """Experimental class - parse actions can raise this exception to cause

+       #~ pyparsing to reparse the input string:

+        #~ - with a modified input string, and/or

+        #~ - with a modified start location

+       #~ Set the values of the ReparseException in the constructor, and raise the

+       #~ exception in a parse action to cause pyparsing to use the new string/location.

+       #~ Setting the values as None causes no change to be made.

+       #~ """

+    #~ def __init_( self, newstring, restartLoc ):

+        #~ self.newParseText = newstring

+        #~ self.reparseLoc = restartLoc

+

+class RecursiveGrammarException(Exception):

+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""

+    def __init__( self, parseElementList ):

+        self.parseElementTrace = parseElementList

+

+    def __str__( self ):

+        return "RecursiveGrammarException: %s" % self.parseElementTrace

+

+class _ParseResultsWithOffset(object):

+    def __init__(self,p1,p2):

+        self.tup = (p1,p2)

+    def __getitem__(self,i):

+        return self.tup[i]

+    def __repr__(self):

+        return repr(self.tup[0])

+    def setOffset(self,i):

+        self.tup = (self.tup[0],i)

+

+class ParseResults(object):

+    """

+    Structured parse results, to provide multiple means of access to the parsed data:

+       - as a list (C{len(results)})

+       - by list index (C{results[0], results[1]}, etc.)

+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})

+

+    Example::

+        integer = Word(nums)

+        date_str = (integer.setResultsName("year") + '/' 

+                        + integer.setResultsName("month") + '/' 

+                        + integer.setResultsName("day"))

+        # equivalent form:

+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+

+        # parseString returns a ParseResults object

+        result = date_str.parseString("1999/12/31")

+

+        def test(s, fn=repr):

+            print("%s -> %s" % (s, fn(eval(s))))

+        test("list(result)")

+        test("result[0]")

+        test("result['month']")

+        test("result.day")

+        test("'month' in result")

+        test("'minutes' in result")

+        test("result.dump()", str)

+    prints::

+        list(result) -> ['1999', '/', '12', '/', '31']

+        result[0] -> '1999'

+        result['month'] -> '12'

+        result.day -> '31'

+        'month' in result -> True

+        'minutes' in result -> False

+        result.dump() -> ['1999', '/', '12', '/', '31']

+        - day: 31

+        - month: 12

+        - year: 1999

+    """

+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):

+        if isinstance(toklist, cls):

+            return toklist

+        retobj = object.__new__(cls)

+        retobj.__doinit = True

+        return retobj

+

+    # Performance tuning: we construct a *lot* of these, so keep this

+    # constructor as small and fast as possible

+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):

+        if self.__doinit:

+            self.__doinit = False

+            self.__name = None

+            self.__parent = None

+            self.__accumNames = {}

+            self.__asList = asList

+            self.__modal = modal

+            if toklist is None:

+                toklist = []

+            if isinstance(toklist, list):

+                self.__toklist = toklist[:]

+            elif isinstance(toklist, _generatorType):

+                self.__toklist = list(toklist)

+            else:

+                self.__toklist = [toklist]

+            self.__tokdict = dict()

+

+        if name is not None and name:

+            if not modal:

+                self.__accumNames[name] = 0

+            if isinstance(name,int):

+                name = _ustr(name) # will always return a str, but use _ustr for consistency

+            self.__name = name

+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):

+                if isinstance(toklist,basestring):

+                    toklist = [ toklist ]

+                if asList:

+                    if isinstance(toklist,ParseResults):

+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)

+                    else:

+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)

+                    self[name].__name = name

+                else:

+                    try:

+                        self[name] = toklist[0]

+                    except (KeyError,TypeError,IndexError):

+                        self[name] = toklist

+

+    def __getitem__( self, i ):

+        if isinstance( i, (int,slice) ):

+            return self.__toklist[i]

+        else:

+            if i not in self.__accumNames:

+                return self.__tokdict[i][-1][0]

+            else:

+                return ParseResults([ v[0] for v in self.__tokdict[i] ])

+

+    def __setitem__( self, k, v, isinstance=isinstance ):

+        if isinstance(v,_ParseResultsWithOffset):

+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]

+            sub = v[0]

+        elif isinstance(k,(int,slice)):

+            self.__toklist[k] = v

+            sub = v

+        else:

+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]

+            sub = v

+        if isinstance(sub,ParseResults):

+            sub.__parent = wkref(self)

+

+    def __delitem__( self, i ):

+        if isinstance(i,(int,slice)):

+            mylen = len( self.__toklist )

+            del self.__toklist[i]

+

+            # convert int to slice

+            if isinstance(i, int):

+                if i < 0:

+                    i += mylen

+                i = slice(i, i+1)

+            # get removed indices

+            removed = list(range(*i.indices(mylen)))

+            removed.reverse()

+            # fixup indices in token dictionary

+            for name,occurrences in self.__tokdict.items():

+                for j in removed:

+                    for k, (value, position) in enumerate(occurrences):

+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))

+        else:

+            del self.__tokdict[i]

+

+    def __contains__( self, k ):

+        return k in self.__tokdict

+

+    def __len__( self ): return len( self.__toklist )

+    def __bool__(self): return ( not not self.__toklist )

+    __nonzero__ = __bool__

+    def __iter__( self ): return iter( self.__toklist )

+    def __reversed__( self ): return iter( self.__toklist[::-1] )

+    def _iterkeys( self ):

+        if hasattr(self.__tokdict, "iterkeys"):

+            return self.__tokdict.iterkeys()

+        else:

+            return iter(self.__tokdict)

+

+    def _itervalues( self ):

+        return (self[k] for k in self._iterkeys())

+            

+    def _iteritems( self ):

+        return ((k, self[k]) for k in self._iterkeys())

+

+    if PY_3:

+        keys = _iterkeys       

+        """Returns an iterator of all named result keys (Python 3.x only)."""

+

+        values = _itervalues

+        """Returns an iterator of all named result values (Python 3.x only)."""

+

+        items = _iteritems

+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""

+

+    else:

+        iterkeys = _iterkeys

+        """Returns an iterator of all named result keys (Python 2.x only)."""

+

+        itervalues = _itervalues

+        """Returns an iterator of all named result values (Python 2.x only)."""

+

+        iteritems = _iteritems

+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""

+

+        def keys( self ):

+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.iterkeys())

+

+        def values( self ):

+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.itervalues())

+                

+        def items( self ):

+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.iteritems())

+

+    def haskeys( self ):

+        """Since keys() returns an iterator, this method is helpful in bypassing

+           code that looks for the existence of any defined results names."""

+        return bool(self.__tokdict)

+        

+    def pop( self, *args, **kwargs):

+        """

+        Removes and returns item at specified index (default=C{last}).

+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no

+        argument or an integer argument, it will use C{list} semantics

+        and pop tokens from the list of parsed tokens. If passed a 

+        non-integer argument (most likely a string), it will use C{dict}

+        semantics and pop the corresponding value from any defined 

+        results names. A second default return value argument is 

+        supported, just as in C{dict.pop()}.

+

+        Example::

+            def remove_first(tokens):

+                tokens.pop(0)

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']

+

+            label = Word(alphas)

+            patt = label("LABEL") + OneOrMore(Word(nums))

+            print(patt.parseString("AAB 123 321").dump())

+

+            # Use pop() in a parse action to remove named result (note that corresponding value is not

+            # removed from list form of results)

+            def remove_LABEL(tokens):

+                tokens.pop("LABEL")

+                return tokens

+            patt.addParseAction(remove_LABEL)

+            print(patt.parseString("AAB 123 321").dump())

+        prints::

+            ['AAB', '123', '321']

+            - LABEL: AAB

+

+            ['AAB', '123', '321']

+        """

+        if not args:

+            args = [-1]

+        for k,v in kwargs.items():

+            if k == 'default':

+                args = (args[0], v)

+            else:

+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)

+        if (isinstance(args[0], int) or 

+                        len(args) == 1 or 

+                        args[0] in self):

+            index = args[0]

+            ret = self[index]

+            del self[index]

+            return ret

+        else:

+            defaultvalue = args[1]

+            return defaultvalue

+

+    def get(self, key, defaultValue=None):

+        """

+        Returns named result matching the given key, or if there is no

+        such name, then returns the given C{defaultValue} or C{None} if no

+        C{defaultValue} is specified.

+

+        Similar to C{dict.get()}.

+        

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            result = date_str.parseString("1999/12/31")

+            print(result.get("year")) # -> '1999'

+            print(result.get("hour", "not specified")) # -> 'not specified'

+            print(result.get("hour")) # -> None

+        """

+        if key in self:

+            return self[key]

+        else:

+            return defaultValue

+

+    def insert( self, index, insStr ):

+        """

+        Inserts new element at location index in the list of parsed tokens.

+        

+        Similar to C{list.insert()}.

+

+        Example::

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+

+            # use a parse action to insert the parse location in the front of the parsed results

+            def insert_locn(locn, tokens):

+                tokens.insert(0, locn)

+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']

+        """

+        self.__toklist.insert(index, insStr)

+        # fixup indices in token dictionary

+        for name,occurrences in self.__tokdict.items():

+            for k, (value, position) in enumerate(occurrences):

+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))

+

+    def append( self, item ):

+        """

+        Add single element to end of ParseResults list of elements.

+

+        Example::

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+            

+            # use a parse action to compute the sum of the parsed integers, and add it to the end

+            def append_sum(tokens):

+                tokens.append(sum(map(int, tokens)))

+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]

+        """

+        self.__toklist.append(item)

+

+    def extend( self, itemseq ):

+        """

+        Add sequence of elements to end of ParseResults list of elements.

+

+        Example::

+            patt = OneOrMore(Word(alphas))

+            

+            # use a parse action to append the reverse of the matched strings, to make a palindrome

+            def make_palindrome(tokens):

+                tokens.extend(reversed([t[::-1] for t in tokens]))

+                return ''.join(tokens)

+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'

+        """

+        if isinstance(itemseq, ParseResults):

+            self += itemseq

+        else:

+            self.__toklist.extend(itemseq)

+

+    def clear( self ):

+        """

+        Clear all elements and results names.

+        """

+        del self.__toklist[:]

+        self.__tokdict.clear()

+

+    def __getattr__( self, name ):

+        try:

+            return self[name]

+        except KeyError:

+            return ""

+            

+        if name in self.__tokdict:

+            if name not in self.__accumNames:

+                return self.__tokdict[name][-1][0]

+            else:

+                return ParseResults([ v[0] for v in self.__tokdict[name] ])

+        else:

+            return ""

+

+    def __add__( self, other ):

+        ret = self.copy()

+        ret += other

+        return ret

+

+    def __iadd__( self, other ):

+        if other.__tokdict:

+            offset = len(self.__toklist)

+            addoffset = lambda a: offset if a<0 else a+offset

+            otheritems = other.__tokdict.items()

+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )

+                                for (k,vlist) in otheritems for v in vlist]

+            for k,v in otherdictitems:

+                self[k] = v

+                if isinstance(v[0],ParseResults):

+                    v[0].__parent = wkref(self)

+            

+        self.__toklist += other.__toklist

+        self.__accumNames.update( other.__accumNames )

+        return self

+

+    def __radd__(self, other):

+        if isinstance(other,int) and other == 0:

+            # useful for merging many ParseResults using sum() builtin

+            return self.copy()

+        else:

+            # this may raise a TypeError - so be it

+            return other + self

+        

+    def __repr__( self ):

+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )

+

+    def __str__( self ):

+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'

+

+    def _asStringList( self, sep='' ):

+        out = []

+        for item in self.__toklist:

+            if out and sep:

+                out.append(sep)

+            if isinstance( item, ParseResults ):

+                out += item._asStringList()

+            else:

+                out.append( _ustr(item) )

+        return out

+

+    def asList( self ):

+        """

+        Returns the parse results as a nested list of matching tokens, all converted to strings.

+

+        Example::

+            patt = OneOrMore(Word(alphas))

+            result = patt.parseString("sldkj lsdkj sldkj")

+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults

+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']

+            

+            # Use asList() to create an actual list

+            result_list = result.asList()

+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']

+        """

+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]

+

+    def asDict( self ):

+        """

+        Returns the named parse results as a nested dictionary.

+

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+            

+            result = date_str.parseString('12/31/1999')

+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})

+            

+            result_dict = result.asDict()

+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}

+

+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict

+            import json

+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable

+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}

+        """

+        if PY_3:

+            item_fn = self.items

+        else:

+            item_fn = self.iteritems

+            

+        def toItem(obj):

+            if isinstance(obj, ParseResults):

+                if obj.haskeys():

+                    return obj.asDict()

+                else:

+                    return [toItem(v) for v in obj]

+            else:

+                return obj

+                

+        return dict((k,toItem(v)) for k,v in item_fn())

+

+    def copy( self ):

+        """

+        Returns a new copy of a C{ParseResults} object.

+        """

+        ret = ParseResults( self.__toklist )

+        ret.__tokdict = self.__tokdict.copy()

+        ret.__parent = self.__parent

+        ret.__accumNames.update( self.__accumNames )

+        ret.__name = self.__name

+        return ret

+

+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):

+        """

+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.

+        """

+        nl = "\n"

+        out = []

+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()

+                                                            for v in vlist)

+        nextLevelIndent = indent + "  "

+

+        # collapse out indents if formatting is not desired

+        if not formatted:

+            indent = ""

+            nextLevelIndent = ""

+            nl = ""

+

+        selfTag = None

+        if doctag is not None:

+            selfTag = doctag

+        else:

+            if self.__name:

+                selfTag = self.__name

+

+        if not selfTag:

+            if namedItemsOnly:

+                return ""

+            else:

+                selfTag = "ITEM"

+

+        out += [ nl, indent, "<", selfTag, ">" ]

+

+        for i,res in enumerate(self.__toklist):

+            if isinstance(res,ParseResults):

+                if i in namedItems:

+                    out += [ res.asXML(namedItems[i],

+                                        namedItemsOnly and doctag is None,

+                                        nextLevelIndent,

+                                        formatted)]

+                else:

+                    out += [ res.asXML(None,

+                                        namedItemsOnly and doctag is None,

+                                        nextLevelIndent,

+                                        formatted)]

+            else:

+                # individual token, see if there is a name for it

+                resTag = None

+                if i in namedItems:

+                    resTag = namedItems[i]

+                if not resTag:

+                    if namedItemsOnly:

+                        continue

+                    else:

+                        resTag = "ITEM"

+                xmlBodyText = _xml_escape(_ustr(res))

+                out += [ nl, nextLevelIndent, "<", resTag, ">",

+                                                xmlBodyText,

+                                                "</", resTag, ">" ]

+

+        out += [ nl, indent, "</", selfTag, ">" ]

+        return "".join(out)

+

+    def __lookup(self,sub):

+        for k,vlist in self.__tokdict.items():

+            for v,loc in vlist:

+                if sub is v:

+                    return k

+        return None

+

+    def getName(self):

+        r"""

+        Returns the results name for this token expression. Useful when several 

+        different expressions might match at a particular location.

+

+        Example::

+            integer = Word(nums)

+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")

+            house_number_expr = Suppress('#') + Word(nums, alphanums)

+            user_data = (Group(house_number_expr)("house_number") 

+                        | Group(ssn_expr)("ssn")

+                        | Group(integer)("age"))

+            user_info = OneOrMore(user_data)

+            

+            result = user_info.parseString("22 111-22-3333 #221B")

+            for item in result:

+                print(item.getName(), ':', item[0])

+        prints::

+            age : 22

+            ssn : 111-22-3333

+            house_number : 221B

+        """

+        if self.__name:

+            return self.__name

+        elif self.__parent:

+            par = self.__parent()

+            if par:

+                return par.__lookup(self)

+            else:

+                return None

+        elif (len(self) == 1 and

+               len(self.__tokdict) == 1 and

+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):

+            return next(iter(self.__tokdict.keys()))

+        else:

+            return None

+

+    def dump(self, indent='', depth=0, full=True):

+        """

+        Diagnostic method for listing out the contents of a C{ParseResults}.

+        Accepts an optional C{indent} argument so that this string can be embedded

+        in a nested display of other data.

+

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+            

+            result = date_str.parseString('12/31/1999')

+            print(result.dump())

+        prints::

+            ['12', '/', '31', '/', '1999']

+            - day: 1999

+            - month: 31

+            - year: 12

+        """

+        out = []

+        NL = '\n'

+        out.append( indent+_ustr(self.asList()) )

+        if full:

+            if self.haskeys():

+                items = sorted((str(k), v) for k,v in self.items())

+                for k,v in items:

+                    if out:

+                        out.append(NL)

+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )

+                    if isinstance(v,ParseResults):

+                        if v:

+                            out.append( v.dump(indent,depth+1) )

+                        else:

+                            out.append(_ustr(v))

+                    else:

+                        out.append(repr(v))

+            elif any(isinstance(vv,ParseResults) for vv in self):

+                v = self

+                for i,vv in enumerate(v):

+                    if isinstance(vv,ParseResults):

+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))

+                    else:

+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))

+            

+        return "".join(out)

+

+    def pprint(self, *args, **kwargs):

+        """

+        Pretty-printer for parsed results as a list, using the C{pprint} module.

+        Accepts additional positional or keyword args as defined for the 

+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})

+

+        Example::

+            ident = Word(alphas, alphanums)

+            num = Word(nums)

+            func = Forward()

+            term = ident | num | Group('(' + func + ')')

+            func <<= ident + Group(Optional(delimitedList(term)))

+            result = func.parseString("fna a,b,(fnb c,d,200),100")

+            result.pprint(width=40)

+        prints::

+            ['fna',

+             ['a',

+              'b',

+              ['(', 'fnb', ['c', 'd', '200'], ')'],

+              '100']]

+        """

+        pprint.pprint(self.asList(), *args, **kwargs)

+

+    # add support for pickle protocol

+    def __getstate__(self):

+        return ( self.__toklist,

+                 ( self.__tokdict.copy(),

+                   self.__parent is not None and self.__parent() or None,

+                   self.__accumNames,

+                   self.__name ) )

+

+    def __setstate__(self,state):

+        self.__toklist = state[0]

+        (self.__tokdict,

+         par,

+         inAccumNames,

+         self.__name) = state[1]

+        self.__accumNames = {}

+        self.__accumNames.update(inAccumNames)

+        if par is not None:

+            self.__parent = wkref(par)

+        else:

+            self.__parent = None

+

+    def __getnewargs__(self):

+        return self.__toklist, self.__name, self.__asList, self.__modal

+

+    def __dir__(self):

+        return (dir(type(self)) + list(self.keys()))

+

+MutableMapping.register(ParseResults)

+

+def col (loc,strg):

+    """Returns current column within a string, counting newlines as line separators.

+   The first column is number 1.

+

+   Note: the default parsing behavior is to expand tabs in the input string

+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information

+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+   consistent view of the parsed string, the parse location, and line and column

+   positions within the parsed string.

+   """

+    s = strg

+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)

+

+def lineno(loc,strg):

+    """Returns current line number within a string, counting newlines as line separators.

+   The first line is number 1.

+

+   Note: the default parsing behavior is to expand tabs in the input string

+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information

+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+   consistent view of the parsed string, the parse location, and line and column

+   positions within the parsed string.

+   """

+    return strg.count("\n",0,loc) + 1

+

+def line( loc, strg ):

+    """Returns the line of text containing loc within a string, counting newlines as line separators.

+       """

+    lastCR = strg.rfind("\n", 0, loc)

+    nextCR = strg.find("\n", loc)

+    if nextCR >= 0:

+        return strg[lastCR+1:nextCR]

+    else:

+        return strg[lastCR+1:]

+

+def _defaultStartDebugAction( instring, loc, expr ):

+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))

+

+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):

+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))

+

+def _defaultExceptionDebugAction( instring, loc, expr, exc ):

+    print ("Exception raised:" + _ustr(exc))

+

+def nullDebugAction(*args):

+    """'Do-nothing' debug action, to suppress debugging output during parsing."""

+    pass

+

+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs

+#~ 'decorator to trim function calls to match the arity of the target'

+#~ def _trim_arity(func, maxargs=3):

+    #~ if func in singleArgBuiltins:

+        #~ return lambda s,l,t: func(t)

+    #~ limit = 0

+    #~ foundArity = False

+    #~ def wrapper(*args):

+        #~ nonlocal limit,foundArity

+        #~ while 1:

+            #~ try:

+                #~ ret = func(*args[limit:])

+                #~ foundArity = True

+                #~ return ret

+            #~ except TypeError:

+                #~ if limit == maxargs or foundArity:

+                    #~ raise

+                #~ limit += 1

+                #~ continue

+    #~ return wrapper

+

+# this version is Python 2.x-3.x cross-compatible

+'decorator to trim function calls to match the arity of the target'

+def _trim_arity(func, maxargs=2):

+    if func in singleArgBuiltins:

+        return lambda s,l,t: func(t)

+    limit = [0]

+    foundArity = [False]

+    

+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples

+    if system_version[:2] >= (3,5):

+        def extract_stack(limit=0):

+            # special handling for Python 3.5.0 - extra deep call stack by 1

+            offset = -3 if system_version == (3,5,0) else -2

+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]

+            return [frame_summary[:2]]

+        def extract_tb(tb, limit=0):

+            frames = traceback.extract_tb(tb, limit=limit)

+            frame_summary = frames[-1]

+            return [frame_summary[:2]]

+    else:

+        extract_stack = traceback.extract_stack

+        extract_tb = traceback.extract_tb

+    

+    # synthesize what would be returned by traceback.extract_stack at the call to 

+    # user's parse action 'func', so that we don't incur call penalty at parse time

+    

+    LINE_DIFF = 6

+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 

+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!

+    this_line = extract_stack(limit=2)[-1]

+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)

+

+    def wrapper(*args):

+        while 1:

+            try:

+                ret = func(*args[limit[0]:])

+                foundArity[0] = True

+                return ret

+            except TypeError:

+                # re-raise TypeErrors if they did not come from our arity testing

+                if foundArity[0]:

+                    raise

+                else:

+                    try:

+                        tb = sys.exc_info()[-1]

+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:

+                            raise

+                    finally:

+                        del tb

+

+                if limit[0] <= maxargs:

+                    limit[0] += 1

+                    continue

+                raise

+

+    # copy func name to wrapper for sensible debug output

+    func_name = "<parse action>"

+    try:

+        func_name = getattr(func, '__name__', 

+                            getattr(func, '__class__').__name__)

+    except Exception:

+        func_name = str(func)

+    wrapper.__name__ = func_name

+

+    return wrapper

+

+class ParserElement(object):

+    """Abstract base level parser element class."""

+    DEFAULT_WHITE_CHARS = " \n\t\r"

+    verbose_stacktrace = False

+

+    @staticmethod

+    def setDefaultWhitespaceChars( chars ):

+        r"""

+        Overrides the default whitespace chars

+

+        Example::

+            # default whitespace chars are space, <TAB> and newline

+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']

+            

+            # change to just treat newline as significant

+            ParserElement.setDefaultWhitespaceChars(" \t")

+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']

+        """

+        ParserElement.DEFAULT_WHITE_CHARS = chars

+

+    @staticmethod

+    def inlineLiteralsUsing(cls):

+        """

+        Set class to be used for inclusion of string literals into a parser.

+        

+        Example::

+            # default literal class used is Literal

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']

+

+

+            # change to Suppress

+            ParserElement.inlineLiteralsUsing(Suppress)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']

+        """

+        ParserElement._literalStringClass = cls

+

+    def __init__( self, savelist=False ):

+        self.parseAction = list()

+        self.failAction = None

+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall

+        self.strRepr = None

+        self.resultsName = None

+        self.saveAsList = savelist

+        self.skipWhitespace = True

+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS

+        self.copyDefaultWhiteChars = True

+        self.mayReturnEmpty = False # used when checking for left-recursion

+        self.keepTabs = False

+        self.ignoreExprs = list()

+        self.debug = False

+        self.streamlined = False

+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index

+        self.errmsg = ""

+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)

+        self.debugActions = ( None, None, None ) #custom debug actions

+        self.re = None

+        self.callPreparse = True # used to avoid redundant calls to preParse

+        self.callDuringTry = False

+

+    def copy( self ):

+        """

+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions

+        for the same parsing pattern, using copies of the original parse element.

+        

+        Example::

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")

+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")

+            

+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))

+        prints::

+            [5120, 100, 655360, 268435456]

+        Equivalent form of C{expr.copy()} is just C{expr()}::

+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")

+        """

+        cpy = copy.copy( self )

+        cpy.parseAction = self.parseAction[:]

+        cpy.ignoreExprs = self.ignoreExprs[:]

+        if self.copyDefaultWhiteChars:

+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS

+        return cpy

+

+    def setName( self, name ):

+        """

+        Define name for this expression, makes debugging and exception messages clearer.

+        

+        Example::

+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)

+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)

+        """

+        self.name = name

+        self.errmsg = "Expected " + self.name

+        if hasattr(self,"exception"):

+            self.exception.msg = self.errmsg

+        return self

+

+    def setResultsName( self, name, listAllMatches=False ):

+        """

+        Define name for referencing matching tokens as a nested attribute

+        of the returned parse results.

+        NOTE: this returns a *copy* of the original C{ParserElement} object;

+        this is so that the client can define a basic element, such as an

+        integer, and reference it in multiple places with different names.

+

+        You can also set results names using the abbreviated syntax,

+        C{expr("name")} in place of C{expr.setResultsName("name")} - 

+        see L{I{__call__}<__call__>}.

+

+        Example::

+            date_str = (integer.setResultsName("year") + '/' 

+                        + integer.setResultsName("month") + '/' 

+                        + integer.setResultsName("day"))

+

+            # equivalent form:

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+        """

+        newself = self.copy()

+        if name.endswith("*"):

+            name = name[:-1]

+            listAllMatches=True

+        newself.resultsName = name

+        newself.modalResults = not listAllMatches

+        return newself

+

+    def setBreak(self,breakFlag = True):

+        """Method to invoke the Python pdb debugger when this element is

+           about to be parsed. Set C{breakFlag} to True to enable, False to

+           disable.

+        """

+        if breakFlag:

+            _parseMethod = self._parse

+            def breaker(instring, loc, doActions=True, callPreParse=True):

+                import pdb

+                pdb.set_trace()

+                return _parseMethod( instring, loc, doActions, callPreParse )

+            breaker._originalParseMethod = _parseMethod

+            self._parse = breaker

+        else:

+            if hasattr(self._parse,"_originalParseMethod"):

+                self._parse = self._parse._originalParseMethod

+        return self

+

+    def setParseAction( self, *fns, **kwargs ):

+        """

+        Define one or more actions to perform when successfully matching parse element definition.

+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},

+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:

+         - s   = the original string being parsed (see note below)

+         - loc = the location of the matching substring

+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object

+        If the functions in fns modify the tokens, they can return them as the return

+        value from fn, and the modified list of tokens will replace the original.

+        Otherwise, fn does not need to return any value.

+

+        Optional keyword arguments:

+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing

+

+        Note: the default parsing behavior is to expand tabs in the input string

+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information

+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+        consistent view of the parsed string, the parse location, and line and column

+        positions within the parsed string.

+        

+        Example::

+            integer = Word(nums)

+            date_str = integer + '/' + integer + '/' + integer

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']

+

+            # use parse action to convert to ints at parse time

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            date_str = integer + '/' + integer + '/' + integer

+

+            # note that integer fields are now ints, not strings

+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]

+        """

+        self.parseAction = list(map(_trim_arity, list(fns)))

+        self.callDuringTry = kwargs.get("callDuringTry", False)

+        return self

+

+    def addParseAction( self, *fns, **kwargs ):

+        """

+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.

+        

+        See examples in L{I{copy}<copy>}.

+        """

+        self.parseAction += list(map(_trim_arity, list(fns)))

+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)

+        return self

+

+    def addCondition(self, *fns, **kwargs):

+        """Add a boolean predicate function to expression's list of parse actions. See 

+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 

+        functions passed to C{addCondition} need to return boolean success/fail of the condition.

+

+        Optional keyword arguments:

+         - message = define a custom message to be used in the raised exception

+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException

+         

+        Example::

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            year_int = integer.copy()

+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")

+            date_str = year_int + '/' + integer + '/' + integer

+

+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)

+        """

+        msg = kwargs.get("message", "failed user-defined condition")

+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException

+        for fn in fns:

+            def pa(s,l,t):

+                if not bool(_trim_arity(fn)(s,l,t)):

+                    raise exc_type(s,l,msg)

+            self.parseAction.append(pa)

+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)

+        return self

+

+    def setFailAction( self, fn ):

+        """Define action to perform if parsing fails at this expression.

+           Fail acton fn is a callable function that takes the arguments

+           C{fn(s,loc,expr,err)} where:

+            - s = string being parsed

+            - loc = location where expression match was attempted and failed

+            - expr = the parse expression that failed

+            - err = the exception thrown

+           The function returns no value.  It may throw C{L{ParseFatalException}}

+           if it is desired to stop parsing immediately."""

+        self.failAction = fn

+        return self

+

+    def _skipIgnorables( self, instring, loc ):

+        exprsFound = True

+        while exprsFound:

+            exprsFound = False

+            for e in self.ignoreExprs:

+                try:

+                    while 1:

+                        loc,dummy = e._parse( instring, loc )

+                        exprsFound = True

+                except ParseException:

+                    pass

+        return loc

+

+    def preParse( self, instring, loc ):

+        if self.ignoreExprs:

+            loc = self._skipIgnorables( instring, loc )

+

+        if self.skipWhitespace:

+            wt = self.whiteChars

+            instrlen = len(instring)

+            while loc < instrlen and instring[loc] in wt:

+                loc += 1

+

+        return loc

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        return loc, []

+

+    def postParse( self, instring, loc, tokenlist ):

+        return tokenlist

+

+    #~ @profile

+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):

+        debugging = ( self.debug ) #and doActions )

+

+        if debugging or self.failAction:

+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))

+            if (self.debugActions[0] ):

+                self.debugActions[0]( instring, loc, self )

+            if callPreParse and self.callPreparse:

+                preloc = self.preParse( instring, loc )

+            else:

+                preloc = loc

+            tokensStart = preloc

+            try:

+                try:

+                    loc,tokens = self.parseImpl( instring, preloc, doActions )

+                except IndexError:

+                    raise ParseException( instring, len(instring), self.errmsg, self )

+            except ParseBaseException as err:

+                #~ print ("Exception raised:", err)

+                if self.debugActions[2]:

+                    self.debugActions[2]( instring, tokensStart, self, err )

+                if self.failAction:

+                    self.failAction( instring, tokensStart, self, err )

+                raise

+        else:

+            if callPreParse and self.callPreparse:

+                preloc = self.preParse( instring, loc )

+            else:

+                preloc = loc

+            tokensStart = preloc

+            if self.mayIndexError or preloc >= len(instring):

+                try:

+                    loc,tokens = self.parseImpl( instring, preloc, doActions )

+                except IndexError:

+                    raise ParseException( instring, len(instring), self.errmsg, self )

+            else:

+                loc,tokens = self.parseImpl( instring, preloc, doActions )

+

+        tokens = self.postParse( instring, loc, tokens )

+

+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )

+        if self.parseAction and (doActions or self.callDuringTry):

+            if debugging:

+                try:

+                    for fn in self.parseAction:

+                        tokens = fn( instring, tokensStart, retTokens )

+                        if tokens is not None:

+                            retTokens = ParseResults( tokens,

+                                                      self.resultsName,

+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),

+                                                      modal=self.modalResults )

+                except ParseBaseException as err:

+                    #~ print "Exception raised in user parse action:", err

+                    if (self.debugActions[2] ):

+                        self.debugActions[2]( instring, tokensStart, self, err )

+                    raise

+            else:

+                for fn in self.parseAction:

+                    tokens = fn( instring, tokensStart, retTokens )

+                    if tokens is not None:

+                        retTokens = ParseResults( tokens,

+                                                  self.resultsName,

+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),

+                                                  modal=self.modalResults )

+        if debugging:

+            #~ print ("Matched",self,"->",retTokens.asList())

+            if (self.debugActions[1] ):

+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )

+

+        return loc, retTokens

+

+    def tryParse( self, instring, loc ):

+        try:

+            return self._parse( instring, loc, doActions=False )[0]

+        except ParseFatalException:

+            raise ParseException( instring, loc, self.errmsg, self)

+    

+    def canParseNext(self, instring, loc):

+        try:

+            self.tryParse(instring, loc)

+        except (ParseException, IndexError):

+            return False

+        else:

+            return True

+

+    class _UnboundedCache(object):

+        def __init__(self):

+            cache = {}

+            self.not_in_cache = not_in_cache = object()

+

+            def get(self, key):

+                return cache.get(key, not_in_cache)

+

+            def set(self, key, value):

+                cache[key] = value

+

+            def clear(self):

+                cache.clear()

+                

+            def cache_len(self):

+                return len(cache)

+

+            self.get = types.MethodType(get, self)

+            self.set = types.MethodType(set, self)

+            self.clear = types.MethodType(clear, self)

+            self.__len__ = types.MethodType(cache_len, self)

+

+    if _OrderedDict is not None:

+        class _FifoCache(object):

+            def __init__(self, size):

+                self.not_in_cache = not_in_cache = object()

+

+                cache = _OrderedDict()

+

+                def get(self, key):

+                    return cache.get(key, not_in_cache)

+

+                def set(self, key, value):

+                    cache[key] = value

+                    while len(cache) > size:

+                        try:

+                            cache.popitem(False)

+                        except KeyError:

+                            pass

+

+                def clear(self):

+                    cache.clear()

+

+                def cache_len(self):

+                    return len(cache)

+

+                self.get = types.MethodType(get, self)

+                self.set = types.MethodType(set, self)

+                self.clear = types.MethodType(clear, self)

+                self.__len__ = types.MethodType(cache_len, self)

+

+    else:

+        class _FifoCache(object):

+            def __init__(self, size):

+                self.not_in_cache = not_in_cache = object()

+

+                cache = {}

+                key_fifo = collections.deque([], size)

+

+                def get(self, key):

+                    return cache.get(key, not_in_cache)

+

+                def set(self, key, value):

+                    cache[key] = value

+                    while len(key_fifo) > size:

+                        cache.pop(key_fifo.popleft(), None)

+                    key_fifo.append(key)

+

+                def clear(self):

+                    cache.clear()

+                    key_fifo.clear()

+

+                def cache_len(self):

+                    return len(cache)

+

+                self.get = types.MethodType(get, self)

+                self.set = types.MethodType(set, self)

+                self.clear = types.MethodType(clear, self)

+                self.__len__ = types.MethodType(cache_len, self)

+

+    # argument cache for optimizing repeated calls when backtracking through recursive expressions

+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail

+    packrat_cache_lock = RLock()

+    packrat_cache_stats = [0, 0]

+

+    # this method gets repeatedly called during backtracking with the same arguments -

+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression

+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):

+        HIT, MISS = 0, 1

+        lookup = (self, instring, loc, callPreParse, doActions)

+        with ParserElement.packrat_cache_lock:

+            cache = ParserElement.packrat_cache

+            value = cache.get(lookup)

+            if value is cache.not_in_cache:

+                ParserElement.packrat_cache_stats[MISS] += 1

+                try:

+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)

+                except ParseBaseException as pe:

+                    # cache a copy of the exception, without the traceback

+                    cache.set(lookup, pe.__class__(*pe.args))

+                    raise

+                else:

+                    cache.set(lookup, (value[0], value[1].copy()))

+                    return value

+            else:

+                ParserElement.packrat_cache_stats[HIT] += 1

+                if isinstance(value, Exception):

+                    raise value

+                return (value[0], value[1].copy())

+

+    _parse = _parseNoCache

+

+    @staticmethod

+    def resetCache():

+        ParserElement.packrat_cache.clear()

+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)

+

+    _packratEnabled = False

+    @staticmethod

+    def enablePackrat(cache_size_limit=128):

+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.

+           Repeated parse attempts at the same string location (which happens

+           often in many complex grammars) can immediately return a cached value,

+           instead of re-executing parsing/validating code.  Memoizing is done of

+           both valid results and parsing exceptions.

+           

+           Parameters:

+            - cache_size_limit - (default=C{128}) - if an integer value is provided

+              will limit the size of the packrat cache; if None is passed, then

+              the cache size will be unbounded; if 0 is passed, the cache will

+              be effectively disabled.

+            

+           This speedup may break existing programs that use parse actions that

+           have side-effects.  For this reason, packrat parsing is disabled when

+           you first import pyparsing.  To activate the packrat feature, your

+           program must call the class method C{ParserElement.enablePackrat()}.  If

+           your program uses C{psyco} to "compile as you go", you must call

+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,

+           Python will crash.  For best results, call C{enablePackrat()} immediately

+           after importing pyparsing.

+           

+           Example::

+               import pyparsing

+               pyparsing.ParserElement.enablePackrat()

+        """

+        if not ParserElement._packratEnabled:

+            ParserElement._packratEnabled = True

+            if cache_size_limit is None:

+                ParserElement.packrat_cache = ParserElement._UnboundedCache()

+            else:

+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)

+            ParserElement._parse = ParserElement._parseCache

+

+    def parseString( self, instring, parseAll=False ):

+        """

+        Execute the parse expression with the given string.

+        This is the main interface to the client code, once the complete

+        expression has been built.

+

+        If you want the grammar to require that the entire input string be

+        successfully parsed, then set C{parseAll} to True (equivalent to ending

+        the grammar with C{L{StringEnd()}}).

+

+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,

+        in order to report proper column numbers in parse actions.

+        If the input string contains tabs and

+        the grammar uses parse actions that use the C{loc} argument to index into the

+        string being parsed, you can ensure you have a consistent view of the input

+        string by:

+         - calling C{parseWithTabs} on your grammar before calling C{parseString}

+           (see L{I{parseWithTabs}<parseWithTabs>})

+         - define your parse action using the full C{(s,loc,toks)} signature, and

+           reference the input string using the parse action's C{s} argument

+         - explictly expand the tabs in your input string before calling

+           C{parseString}

+        

+        Example::

+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']

+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text

+        """

+        ParserElement.resetCache()

+        if not self.streamlined:

+            self.streamline()

+            #~ self.saveAsList = True

+        for e in self.ignoreExprs:

+            e.streamline()

+        if not self.keepTabs:

+            instring = instring.expandtabs()

+        try:

+            loc, tokens = self._parse( instring, 0 )

+            if parseAll:

+                loc = self.preParse( instring, loc )

+                se = Empty() + StringEnd()

+                se._parse( instring, loc )

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+        else:

+            return tokens

+

+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):

+        """

+        Scan the input string for expression matches.  Each match will return the

+        matching tokens, start location, and end location.  May be called with optional

+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If

+        C{overlap} is specified, then overlapping matches will be reported.

+

+        Note that the start and end locations are reported relative to the string

+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing

+        strings with embedded tabs.

+

+        Example::

+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"

+            print(source)

+            for tokens,start,end in Word(alphas).scanString(source):

+                print(' '*start + '^'*(end-start))

+                print(' '*start + tokens[0])

+        

+        prints::

+        

+            sldjf123lsdjjkf345sldkjf879lkjsfd987

+            ^^^^^

+            sldjf

+                    ^^^^^^^

+                    lsdjjkf

+                              ^^^^^^

+                              sldkjf

+                                       ^^^^^^

+                                       lkjsfd

+        """

+        if not self.streamlined:

+            self.streamline()

+        for e in self.ignoreExprs:

+            e.streamline()

+

+        if not self.keepTabs:

+            instring = _ustr(instring).expandtabs()

+        instrlen = len(instring)

+        loc = 0

+        preparseFn = self.preParse

+        parseFn = self._parse

+        ParserElement.resetCache()

+        matches = 0

+        try:

+            while loc <= instrlen and matches < maxMatches:

+                try:

+                    preloc = preparseFn( instring, loc )

+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )

+                except ParseException:

+                    loc = preloc+1

+                else:

+                    if nextLoc > loc:

+                        matches += 1

+                        yield tokens, preloc, nextLoc

+                        if overlap:

+                            nextloc = preparseFn( instring, loc )

+                            if nextloc > loc:

+                                loc = nextLoc

+                            else:

+                                loc += 1

+                        else:

+                            loc = nextLoc

+                    else:

+                        loc = preloc+1

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def transformString( self, instring ):

+        """

+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may

+        be returned from a parse action.  To use C{transformString}, define a grammar and

+        attach a parse action to it that modifies the returned token list.

+        Invoking C{transformString()} on a target string will then scan for matches,

+        and replace the matched text patterns according to the logic in the parse

+        action.  C{transformString()} returns the resulting transformed string.

+        

+        Example::

+            wd = Word(alphas)

+            wd.setParseAction(lambda toks: toks[0].title())

+            

+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))

+        Prints::

+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.

+        """

+        out = []

+        lastE = 0

+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to

+        # keep string locs straight between transformString and scanString

+        self.keepTabs = True

+        try:

+            for t,s,e in self.scanString( instring ):

+                out.append( instring[lastE:s] )

+                if t:

+                    if isinstance(t,ParseResults):

+                        out += t.asList()

+                    elif isinstance(t,list):

+                        out += t

+                    else:

+                        out.append(t)

+                lastE = e

+            out.append(instring[lastE:])

+            out = [o for o in out if o]

+            return "".join(map(_ustr,_flatten(out)))

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def searchString( self, instring, maxMatches=_MAX_INT ):

+        """

+        Another extension to C{L{scanString}}, simplifying the access to the tokens found

+        to match the given parse expression.  May be called with optional

+        C{maxMatches} argument, to clip searching after 'n' matches are found.

+        

+        Example::

+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters

+            cap_word = Word(alphas.upper(), alphas.lower())

+            

+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))

+

+            # the sum() builtin can be used to merge results into a single ParseResults object

+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))

+        prints::

+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]

+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']

+        """

+        try:

+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):

+        """

+        Generator method to split a string using the given expression as a separator.

+        May be called with optional C{maxsplit} argument, to limit the number of splits;

+        and the optional C{includeSeparators} argument (default=C{False}), if the separating

+        matching text should be included in the split results.

+        

+        Example::        

+            punc = oneOf(list(".,;:/-!?"))

+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))

+        prints::

+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']

+        """

+        splits = 0

+        last = 0

+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):

+            yield instring[last:s]

+            if includeSeparators:

+                yield t[0]

+            last = e

+        yield instring[last:]

+

+    def __add__(self, other ):

+        """

+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement

+        converts them to L{Literal}s by default.

+        

+        Example::

+            greet = Word(alphas) + "," + Word(alphas) + "!"

+            hello = "Hello, World!"

+            print (hello, "->", greet.parseString(hello))

+        Prints::

+            Hello, World! -> ['Hello', ',', 'World', '!']

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return And( [ self, other ] )

+

+    def __radd__(self, other ):

+        """

+        Implementation of + operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other + self

+

+    def __sub__(self, other):

+        """

+        Implementation of - operator, returns C{L{And}} with error stop

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return self + And._ErrorStop() + other

+

+    def __rsub__(self, other ):

+        """

+        Implementation of - operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other - self

+

+    def __mul__(self,other):

+        """

+        Implementation of * operator, allows use of C{expr * 3} in place of

+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer

+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples

+        may also include C{None} as in:

+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent

+              to C{expr*n + L{ZeroOrMore}(expr)}

+              (read as "at least n instances of C{expr}")

+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}

+              (read as "0 to n instances of C{expr}")

+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}

+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}

+

+        Note that C{expr*(None,n)} does not raise an exception if

+        more than n exprs exist in the input stream; that is,

+        C{expr*(None,n)} does not enforce a maximum number of expr

+        occurrences.  If this behavior is desired, then write

+        C{expr*(None,n) + ~expr}

+        """

+        if isinstance(other,int):

+            minElements, optElements = other,0

+        elif isinstance(other,tuple):

+            other = (other + (None, None))[:2]

+            if other[0] is None:

+                other = (0, other[1])

+            if isinstance(other[0],int) and other[1] is None:

+                if other[0] == 0:

+                    return ZeroOrMore(self)

+                if other[0] == 1:

+                    return OneOrMore(self)

+                else:

+                    return self*other[0] + ZeroOrMore(self)

+            elif isinstance(other[0],int) and isinstance(other[1],int):

+                minElements, optElements = other

+                optElements -= minElements

+            else:

+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))

+        else:

+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))

+

+        if minElements < 0:

+            raise ValueError("cannot multiply ParserElement by negative value")

+        if optElements < 0:

+            raise ValueError("second tuple value must be greater or equal to first tuple value")

+        if minElements == optElements == 0:

+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")

+

+        if (optElements):

+            def makeOptionalList(n):

+                if n>1:

+                    return Optional(self + makeOptionalList(n-1))

+                else:

+                    return Optional(self)

+            if minElements:

+                if minElements == 1:

+                    ret = self + makeOptionalList(optElements)

+                else:

+                    ret = And([self]*minElements) + makeOptionalList(optElements)

+            else:

+                ret = makeOptionalList(optElements)

+        else:

+            if minElements == 1:

+                ret = self

+            else:

+                ret = And([self]*minElements)

+        return ret

+

+    def __rmul__(self, other):

+        return self.__mul__(other)

+

+    def __or__(self, other ):

+        """

+        Implementation of | operator - returns C{L{MatchFirst}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return MatchFirst( [ self, other ] )

+

+    def __ror__(self, other ):

+        """

+        Implementation of | operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other | self

+

+    def __xor__(self, other ):

+        """

+        Implementation of ^ operator - returns C{L{Or}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return Or( [ self, other ] )

+

+    def __rxor__(self, other ):

+        """

+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other ^ self

+

+    def __and__(self, other ):

+        """

+        Implementation of & operator - returns C{L{Each}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return Each( [ self, other ] )

+

+    def __rand__(self, other ):

+        """

+        Implementation of & operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other & self

+

+    def __invert__( self ):

+        """

+        Implementation of ~ operator - returns C{L{NotAny}}

+        """

+        return NotAny( self )

+

+    def __call__(self, name=None):

+        """

+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.

+        

+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be

+        passed as C{True}.

+           

+        If C{name} is omitted, same as calling C{L{copy}}.

+

+        Example::

+            # these are equivalent

+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")

+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             

+        """

+        if name is not None:

+            return self.setResultsName(name)

+        else:

+            return self.copy()

+

+    def suppress( self ):

+        """

+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from

+        cluttering up returned output.

+        """

+        return Suppress( self )

+

+    def leaveWhitespace( self ):

+        """

+        Disables the skipping of whitespace before matching the characters in the

+        C{ParserElement}'s defined pattern.  This is normally only used internally by

+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.

+        """

+        self.skipWhitespace = False

+        return self

+

+    def setWhitespaceChars( self, chars ):

+        """

+        Overrides the default whitespace chars

+        """

+        self.skipWhitespace = True

+        self.whiteChars = chars

+        self.copyDefaultWhiteChars = False

+        return self

+

+    def parseWithTabs( self ):

+        """

+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.

+        Must be called before C{parseString} when the input grammar contains elements that

+        match C{<TAB>} characters.

+        """

+        self.keepTabs = True

+        return self

+

+    def ignore( self, other ):

+        """

+        Define expression to be ignored (e.g., comments) while doing pattern

+        matching; may be called repeatedly, to define multiple comment or other

+        ignorable patterns.

+        

+        Example::

+            patt = OneOrMore(Word(alphas))

+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']

+            

+            patt.ignore(cStyleComment)

+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']

+        """

+        if isinstance(other, basestring):

+            other = Suppress(other)

+

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                self.ignoreExprs.append(other)

+        else:

+            self.ignoreExprs.append( Suppress( other.copy() ) )

+        return self

+

+    def setDebugActions( self, startAction, successAction, exceptionAction ):

+        """

+        Enable display of debugging messages while doing pattern matching.

+        """

+        self.debugActions = (startAction or _defaultStartDebugAction,

+                             successAction or _defaultSuccessDebugAction,

+                             exceptionAction or _defaultExceptionDebugAction)

+        self.debug = True

+        return self

+

+    def setDebug( self, flag=True ):

+        """

+        Enable display of debugging messages while doing pattern matching.

+        Set C{flag} to True to enable, False to disable.

+

+        Example::

+            wd = Word(alphas).setName("alphaword")

+            integer = Word(nums).setName("numword")

+            term = wd | integer

+            

+            # turn on debugging for wd

+            wd.setDebug()

+

+            OneOrMore(term).parseString("abc 123 xyz 890")

+        

+        prints::

+            Match alphaword at loc 0(1,1)

+            Matched alphaword -> ['abc']

+            Match alphaword at loc 3(1,4)

+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)

+            Match alphaword at loc 7(1,8)

+            Matched alphaword -> ['xyz']

+            Match alphaword at loc 11(1,12)

+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)

+            Match alphaword at loc 15(1,16)

+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)

+

+        The output shown is that produced by the default debug actions - custom debug actions can be

+        specified using L{setDebugActions}. Prior to attempting

+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}

+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}

+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,

+        which makes debugging and exception messages easier to understand - for instance, the default

+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.

+        """

+        if flag:

+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )

+        else:

+            self.debug = False

+        return self

+

+    def __str__( self ):

+        return self.name

+

+    def __repr__( self ):

+        return _ustr(self)

+

+    def streamline( self ):

+        self.streamlined = True

+        self.strRepr = None

+        return self

+

+    def checkRecursion( self, parseElementList ):

+        pass

+

+    def validate( self, validateTrace=[] ):

+        """

+        Check defined expressions for valid structure, check for infinite recursive definitions.

+        """

+        self.checkRecursion( [] )

+

+    def parseFile( self, file_or_filename, parseAll=False ):

+        """

+        Execute the parse expression on the given file or filename.

+        If a filename is specified (instead of a file object),

+        the entire file is opened, read, and closed before parsing.

+        """

+        try:

+            file_contents = file_or_filename.read()

+        except AttributeError:

+            with open(file_or_filename, "r") as f:

+                file_contents = f.read()

+        try:

+            return self.parseString(file_contents, parseAll)

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def __eq__(self,other):

+        if isinstance(other, ParserElement):

+            return self is other or vars(self) == vars(other)

+        elif isinstance(other, basestring):

+            return self.matches(other)

+        else:

+            return super(ParserElement,self)==other

+

+    def __ne__(self,other):

+        return not (self == other)

+

+    def __hash__(self):

+        return hash(id(self))

+

+    def __req__(self,other):

+        return self == other

+

+    def __rne__(self,other):

+        return not (self == other)

+

+    def matches(self, testString, parseAll=True):

+        """

+        Method for quick testing of a parser against a test string. Good for simple 

+        inline microtests of sub expressions while building up larger parser.

+           

+        Parameters:

+         - testString - to test against this expression for a match

+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests

+            

+        Example::

+            expr = Word(nums)

+            assert expr.matches("100")

+        """

+        try:

+            self.parseString(_ustr(testString), parseAll=parseAll)

+            return True

+        except ParseBaseException:

+            return False

+                

+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):

+        """

+        Execute the parse expression on a series of test strings, showing each

+        test, the parsed results or where the parse failed. Quick and easy way to

+        run a parse expression against a list of sample strings.

+           

+        Parameters:

+         - tests - a list of separate test strings, or a multiline string of test strings

+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           

+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 

+              string; pass None to disable comment filtering

+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;

+              if False, only dump nested list

+         - printResults - (default=C{True}) prints test output to stdout

+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing

+

+        Returns: a (success, results) tuple, where success indicates that all tests succeeded

+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 

+        test's output

+        

+        Example::

+            number_expr = pyparsing_common.number.copy()

+

+            result = number_expr.runTests('''

+                # unsigned integer

+                100

+                # negative integer

+                -100

+                # float with scientific notation

+                6.02e23

+                # integer with scientific notation

+                1e-12

+                ''')

+            print("Success" if result[0] else "Failed!")

+

+            result = number_expr.runTests('''

+                # stray character

+                100Z

+                # missing leading digit before '.'

+                -.100

+                # too many '.'

+                3.14.159

+                ''', failureTests=True)

+            print("Success" if result[0] else "Failed!")

+        prints::

+            # unsigned integer

+            100

+            [100]

+

+            # negative integer

+            -100

+            [-100]

+

+            # float with scientific notation

+            6.02e23

+            [6.02e+23]

+

+            # integer with scientific notation

+            1e-12

+            [1e-12]

+

+            Success

+            

+            # stray character

+            100Z

+               ^

+            FAIL: Expected end of text (at char 3), (line:1, col:4)

+

+            # missing leading digit before '.'

+            -.100

+            ^

+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)

+

+            # too many '.'

+            3.14.159

+                ^

+            FAIL: Expected end of text (at char 4), (line:1, col:5)

+

+            Success

+

+        Each test string must be on a single line. If you want to test a string that spans multiple

+        lines, create a test like this::

+

+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")

+        

+        (Note that this is a raw string literal, you must include the leading 'r'.)

+        """

+        if isinstance(tests, basestring):

+            tests = list(map(str.strip, tests.rstrip().splitlines()))

+        if isinstance(comment, basestring):

+            comment = Literal(comment)

+        allResults = []

+        comments = []

+        success = True

+        for t in tests:

+            if comment is not None and comment.matches(t, False) or comments and not t:

+                comments.append(t)

+                continue

+            if not t:

+                continue

+            out = ['\n'.join(comments), t]

+            comments = []

+            try:

+                t = t.replace(r'\n','\n')

+                result = self.parseString(t, parseAll=parseAll)

+                out.append(result.dump(full=fullDump))

+                success = success and not failureTests

+            except ParseBaseException as pe:

+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""

+                if '\n' in t:

+                    out.append(line(pe.loc, t))

+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)

+                else:

+                    out.append(' '*pe.loc + '^' + fatal)

+                out.append("FAIL: " + str(pe))

+                success = success and failureTests

+                result = pe

+            except Exception as exc:

+                out.append("FAIL-EXCEPTION: " + str(exc))

+                success = success and failureTests

+                result = exc

+

+            if printResults:

+                if fullDump:

+                    out.append('')

+                print('\n'.join(out))

+

+            allResults.append((t, result))

+        

+        return success, allResults

+

+        

+class Token(ParserElement):

+    """

+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.

+    """

+    def __init__( self ):

+        super(Token,self).__init__( savelist=False )

+

+

+class Empty(Token):

+    """

+    An empty token, will always match.

+    """

+    def __init__( self ):

+        super(Empty,self).__init__()

+        self.name = "Empty"

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+

+

+class NoMatch(Token):

+    """

+    A token that will never match.

+    """

+    def __init__( self ):

+        super(NoMatch,self).__init__()

+        self.name = "NoMatch"

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+        self.errmsg = "Unmatchable token"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        raise ParseException(instring, loc, self.errmsg, self)

+

+

+class Literal(Token):

+    """

+    Token to exactly match a specified string.

+    

+    Example::

+        Literal('blah').parseString('blah')  # -> ['blah']

+        Literal('blah').parseString('blahfooblah')  # -> ['blah']

+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"

+    

+    For case-insensitive matching, use L{CaselessLiteral}.

+    

+    For keyword matching (force word break before and after the matched string),

+    use L{Keyword} or L{CaselessKeyword}.

+    """

+    def __init__( self, matchString ):

+        super(Literal,self).__init__()

+        self.match = matchString

+        self.matchLen = len(matchString)

+        try:

+            self.firstMatchChar = matchString[0]

+        except IndexError:

+            warnings.warn("null string passed to Literal; use Empty() instead",

+                            SyntaxWarning, stacklevel=2)

+            self.__class__ = Empty

+        self.name = '"%s"' % _ustr(self.match)

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = False

+        self.mayIndexError = False

+

+    # Performance tuning: this routine gets called a *lot*

+    # if this is a single character match string  and the first character matches,

+    # short-circuit as quickly as possible, and avoid calling startswith

+    #~ @profile

+    def parseImpl( self, instring, loc, doActions=True ):

+        if (instring[loc] == self.firstMatchChar and

+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):

+            return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+_L = Literal

+ParserElement._literalStringClass = Literal

+

+class Keyword(Token):

+    """

+    Token to exactly match a specified string as a keyword, that is, it must be

+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:

+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.

+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}

+    Accepts two optional constructor arguments in addition to the keyword string:

+     - C{identChars} is a string of characters that would be valid identifier characters,

+          defaulting to all alphanumerics + "_" and "$"

+     - C{caseless} allows case-insensitive matching, default is C{False}.

+       

+    Example::

+        Keyword("start").parseString("start")  # -> ['start']

+        Keyword("start").parseString("starting")  # -> Exception

+

+    For case-insensitive matching, use L{CaselessKeyword}.

+    """

+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"

+

+    def __init__( self, matchString, identChars=None, caseless=False ):

+        super(Keyword,self).__init__()

+        if identChars is None:

+            identChars = Keyword.DEFAULT_KEYWORD_CHARS

+        self.match = matchString

+        self.matchLen = len(matchString)

+        try:

+            self.firstMatchChar = matchString[0]

+        except IndexError:

+            warnings.warn("null string passed to Keyword; use Empty() instead",

+                            SyntaxWarning, stacklevel=2)

+        self.name = '"%s"' % self.match

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = False

+        self.mayIndexError = False

+        self.caseless = caseless

+        if caseless:

+            self.caselessmatch = matchString.upper()

+            identChars = identChars.upper()

+        self.identChars = set(identChars)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.caseless:

+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and

+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and

+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):

+                return loc+self.matchLen, self.match

+        else:

+            if (instring[loc] == self.firstMatchChar and

+                (self.matchLen==1 or instring.startswith(self.match,loc)) and

+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and

+                (loc == 0 or instring[loc-1] not in self.identChars) ):

+                return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+

+    def copy(self):

+        c = super(Keyword,self).copy()

+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS

+        return c

+

+    @staticmethod

+    def setDefaultKeywordChars( chars ):

+        """Overrides the default Keyword chars

+        """

+        Keyword.DEFAULT_KEYWORD_CHARS = chars

+

+class CaselessLiteral(Literal):

+    """

+    Token to match a specified string, ignoring case of letters.

+    Note: the matched results will always be in the case of the given

+    match string, NOT the case of the input text.

+

+    Example::

+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']

+        

+    (Contrast with example for L{CaselessKeyword}.)

+    """

+    def __init__( self, matchString ):

+        super(CaselessLiteral,self).__init__( matchString.upper() )

+        # Preserve the defining literal.

+        self.returnString = matchString

+        self.name = "'%s'" % self.returnString

+        self.errmsg = "Expected " + self.name

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if instring[ loc:loc+self.matchLen ].upper() == self.match:

+            return loc+self.matchLen, self.returnString

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class CaselessKeyword(Keyword):

+    """

+    Caseless version of L{Keyword}.

+

+    Example::

+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']

+        

+    (Contrast with example for L{CaselessLiteral}.)

+    """

+    def __init__( self, matchString, identChars=None ):

+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and

+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):

+            return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class CloseMatch(Token):

+    """

+    A variation on L{Literal} which matches "close" matches, that is, 

+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:

+     - C{match_string} - string to be matched

+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match

+    

+    The results from a successful parse will contain the matched text from the input string and the following named results:

+     - C{mismatches} - a list of the positions within the match_string where mismatches were found

+     - C{original} - the original match_string used to compare against the input string

+    

+    If C{mismatches} is an empty list, then the match was an exact match.

+    

+    Example::

+        patt = CloseMatch("ATCATCGAATGGA")

+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})

+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)

+

+        # exact match

+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})

+

+        # close match allowing up to 2 mismatches

+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)

+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})

+    """

+    def __init__(self, match_string, maxMismatches=1):

+        super(CloseMatch,self).__init__()

+        self.name = match_string

+        self.match_string = match_string

+        self.maxMismatches = maxMismatches

+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)

+        self.mayIndexError = False

+        self.mayReturnEmpty = False

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        start = loc

+        instrlen = len(instring)

+        maxloc = start + len(self.match_string)

+

+        if maxloc <= instrlen:

+            match_string = self.match_string

+            match_stringloc = 0

+            mismatches = []

+            maxMismatches = self.maxMismatches

+

+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):

+                src,mat = s_m

+                if src != mat:

+                    mismatches.append(match_stringloc)

+                    if len(mismatches) > maxMismatches:

+                        break

+            else:

+                loc = match_stringloc + 1

+                results = ParseResults([instring[start:loc]])

+                results['original'] = self.match_string

+                results['mismatches'] = mismatches

+                return loc, results

+

+        raise ParseException(instring, loc, self.errmsg, self)

+

+

+class Word(Token):

+    """

+    Token for matching words composed of allowed character sets.

+    Defined with string containing all allowed initial characters,

+    an optional string containing allowed body characters (if omitted,

+    defaults to the initial character set), and an optional minimum,

+    maximum, and/or exact length.  The default value for C{min} is 1 (a

+    minimum value < 1 is not valid); the default values for C{max} and C{exact}

+    are 0, meaning no maximum or exact length restriction. An optional

+    C{excludeChars} parameter can list characters that might be found in 

+    the input C{bodyChars} string; useful to define a word of all printables

+    except for one or two characters, for instance.

+    

+    L{srange} is useful for defining custom character set strings for defining 

+    C{Word} expressions, using range notation from regular expression character sets.

+    

+    A common mistake is to use C{Word} to match a specific literal string, as in 

+    C{Word("Address")}. Remember that C{Word} uses the string argument to define

+    I{sets} of matchable characters. This expression would match "Add", "AAA",

+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.

+    To match an exact literal string, use L{Literal} or L{Keyword}.

+

+    pyparsing includes helper strings for building Words:

+     - L{alphas}

+     - L{nums}

+     - L{alphanums}

+     - L{hexnums}

+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)

+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)

+     - L{printables} (any non-whitespace character)

+

+    Example::

+        # a word composed of digits

+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))

+        

+        # a word with a leading capital, and zero or more lowercase

+        capital_word = Word(alphas.upper(), alphas.lower())

+

+        # hostnames are alphanumeric, with leading alpha, and '-'

+        hostname = Word(alphas, alphanums+'-')

+        

+        # roman numeral (not a strict parser, accepts invalid mix of characters)

+        roman = Word("IVXLCDM")

+        

+        # any string of non-whitespace characters, except for ','

+        csv_value = Word(printables, excludeChars=",")

+    """

+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):

+        super(Word,self).__init__()

+        if excludeChars:

+            initChars = ''.join(c for c in initChars if c not in excludeChars)

+            if bodyChars:

+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)

+        self.initCharsOrig = initChars

+        self.initChars = set(initChars)

+        if bodyChars :

+            self.bodyCharsOrig = bodyChars

+            self.bodyChars = set(bodyChars)

+        else:

+            self.bodyCharsOrig = initChars

+            self.bodyChars = set(initChars)

+

+        self.maxSpecified = max > 0

+

+        if min < 1:

+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.asKeyword = asKeyword

+

+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):

+            if self.bodyCharsOrig == self.initCharsOrig:

+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)

+            elif len(self.initCharsOrig) == 1:

+                self.reString = "%s[%s]*" % \

+                                      (re.escape(self.initCharsOrig),

+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)

+            else:

+                self.reString = "[%s][%s]*" % \

+                                      (_escapeRegexRangeChars(self.initCharsOrig),

+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)

+            if self.asKeyword:

+                self.reString = r"\b"+self.reString+r"\b"

+            try:

+                self.re = re.compile( self.reString )

+            except Exception:

+                self.re = None

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.re:

+            result = self.re.match(instring,loc)

+            if not result:

+                raise ParseException(instring, loc, self.errmsg, self)

+

+            loc = result.end()

+            return loc, result.group()

+

+        if not(instring[ loc ] in self.initChars):

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        start = loc

+        loc += 1

+        instrlen = len(instring)

+        bodychars = self.bodyChars

+        maxloc = start + self.maxLen

+        maxloc = min( maxloc, instrlen )

+        while loc < maxloc and instring[loc] in bodychars:

+            loc += 1

+

+        throwException = False

+        if loc - start < self.minLen:

+            throwException = True

+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:

+            throwException = True

+        if self.asKeyword:

+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):

+                throwException = True

+

+        if throwException:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+    def __str__( self ):

+        try:

+            return super(Word,self).__str__()

+        except Exception:

+            pass

+

+

+        if self.strRepr is None:

+

+            def charsAsStr(s):

+                if len(s)>4:

+                    return s[:4]+"..."

+                else:

+                    return s

+

+            if ( self.initCharsOrig != self.bodyCharsOrig ):

+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )

+            else:

+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)

+

+        return self.strRepr

+

+

+class Regex(Token):

+    r"""

+    Token for matching strings that match a given regular expression.

+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.

+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 

+    named parse results.

+

+    Example::

+        realnum = Regex(r"[+-]?\d+\.\d*")

+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')

+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression

+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")

+    """

+    compiledREtype = type(re.compile("[A-Z]"))

+    def __init__( self, pattern, flags=0):

+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""

+        super(Regex,self).__init__()

+

+        if isinstance(pattern, basestring):

+            if not pattern:

+                warnings.warn("null string passed to Regex; use Empty() instead",

+                        SyntaxWarning, stacklevel=2)

+

+            self.pattern = pattern

+            self.flags = flags

+

+            try:

+                self.re = re.compile(self.pattern, self.flags)

+                self.reString = self.pattern

+            except sre_constants.error:

+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,

+                    SyntaxWarning, stacklevel=2)

+                raise

+

+        elif isinstance(pattern, Regex.compiledREtype):

+            self.re = pattern

+            self.pattern = \

+            self.reString = str(pattern)

+            self.flags = flags

+            

+        else:

+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        result = self.re.match(instring,loc)

+        if not result:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        loc = result.end()

+        d = result.groupdict()

+        ret = ParseResults(result.group())

+        if d:

+            for k in d:

+                ret[k] = d[k]

+        return loc,ret

+

+    def __str__( self ):

+        try:

+            return super(Regex,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "Re:(%s)" % repr(self.pattern)

+

+        return self.strRepr

+

+

+class QuotedString(Token):

+    r"""

+    Token for matching strings that are delimited by quoting characters.

+    

+    Defined with the following parameters:

+        - quoteChar - string of one or more characters defining the quote delimiting string

+        - escChar - character to escape quotes, typically backslash (default=C{None})

+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})

+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})

+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})

+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)

+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})

+

+    Example::

+        qs = QuotedString('"')

+        print(qs.searchString('lsjdf "This is the quote" sldjf'))

+        complex_qs = QuotedString('{{', endQuoteChar='}}')

+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))

+        sql_qs = QuotedString('"', escQuote='""')

+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))

+    prints::

+        [['This is the quote']]

+        [['This is the "quote"']]

+        [['This is the quote with "embedded" quotes']]

+    """

+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):

+        super(QuotedString,self).__init__()

+

+        # remove white space from quote chars - wont work anyway

+        quoteChar = quoteChar.strip()

+        if not quoteChar:

+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)

+            raise SyntaxError()

+

+        if endQuoteChar is None:

+            endQuoteChar = quoteChar

+        else:

+            endQuoteChar = endQuoteChar.strip()

+            if not endQuoteChar:

+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)

+                raise SyntaxError()

+

+        self.quoteChar = quoteChar

+        self.quoteCharLen = len(quoteChar)

+        self.firstQuoteChar = quoteChar[0]

+        self.endQuoteChar = endQuoteChar

+        self.endQuoteCharLen = len(endQuoteChar)

+        self.escChar = escChar

+        self.escQuote = escQuote

+        self.unquoteResults = unquoteResults

+        self.convertWhitespaceEscapes = convertWhitespaceEscapes

+

+        if multiline:

+            self.flags = re.MULTILINE | re.DOTALL

+            self.pattern = r'%s(?:[^%s%s]' % \

+                ( re.escape(self.quoteChar),

+                  _escapeRegexRangeChars(self.endQuoteChar[0]),

+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )

+        else:

+            self.flags = 0

+            self.pattern = r'%s(?:[^%s\n\r%s]' % \

+                ( re.escape(self.quoteChar),

+                  _escapeRegexRangeChars(self.endQuoteChar[0]),

+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )

+        if len(self.endQuoteChar) > 1:

+            self.pattern += (

+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),

+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))

+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'

+                )

+        if escQuote:

+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))

+        if escChar:

+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))

+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"

+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))

+

+        try:

+            self.re = re.compile(self.pattern, self.flags)

+            self.reString = self.pattern

+        except sre_constants.error:

+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,

+                SyntaxWarning, stacklevel=2)

+            raise

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None

+        if not result:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        loc = result.end()

+        ret = result.group()

+

+        if self.unquoteResults:

+

+            # strip off quotes

+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]

+

+            if isinstance(ret,basestring):

+                # replace escaped whitespace

+                if '\\' in ret and self.convertWhitespaceEscapes:

+                    ws_map = {

+                        r'\t' : '\t',

+                        r'\n' : '\n',

+                        r'\f' : '\f',

+                        r'\r' : '\r',

+                    }

+                    for wslit,wschar in ws_map.items():

+                        ret = ret.replace(wslit, wschar)

+

+                # replace escaped characters

+                if self.escChar:

+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)

+

+                # replace escaped quotes

+                if self.escQuote:

+                    ret = ret.replace(self.escQuote, self.endQuoteChar)

+

+        return loc, ret

+

+    def __str__( self ):

+        try:

+            return super(QuotedString,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)

+

+        return self.strRepr

+

+

+class CharsNotIn(Token):

+    """

+    Token for matching words composed of characters I{not} in a given set (will

+    include whitespace in matched characters if not listed in the provided exclusion set - see example).

+    Defined with string containing all disallowed characters, and an optional

+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a

+    minimum value < 1 is not valid); the default values for C{max} and C{exact}

+    are 0, meaning no maximum or exact length restriction.

+

+    Example::

+        # define a comma-separated-value as anything that is not a ','

+        csv_value = CharsNotIn(',')

+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))

+    prints::

+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']

+    """

+    def __init__( self, notChars, min=1, max=0, exact=0 ):

+        super(CharsNotIn,self).__init__()

+        self.skipWhitespace = False

+        self.notChars = notChars

+

+        if min < 1:

+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = ( self.minLen == 0 )

+        self.mayIndexError = False

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if instring[loc] in self.notChars:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        start = loc

+        loc += 1

+        notchars = self.notChars

+        maxlen = min( start+self.maxLen, len(instring) )

+        while loc < maxlen and \

+              (instring[loc] not in notchars):

+            loc += 1

+

+        if loc - start < self.minLen:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+    def __str__( self ):

+        try:

+            return super(CharsNotIn, self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            if len(self.notChars) > 4:

+                self.strRepr = "!W:(%s...)" % self.notChars[:4]

+            else:

+                self.strRepr = "!W:(%s)" % self.notChars

+

+        return self.strRepr

+

+class White(Token):

+    """

+    Special matching class for matching whitespace.  Normally, whitespace is ignored

+    by pyparsing grammars.  This class is included when some whitespace structures

+    are significant.  Define with a string containing the whitespace characters to be

+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,

+    as defined for the C{L{Word}} class.

+    """

+    whiteStrs = {

+        " " : "<SPC>",

+        "\t": "<TAB>",

+        "\n": "<LF>",

+        "\r": "<CR>",

+        "\f": "<FF>",

+        }

+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):

+        super(White,self).__init__()

+        self.matchWhite = ws

+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )

+        #~ self.leaveWhitespace()

+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))

+        self.mayReturnEmpty = True

+        self.errmsg = "Expected " + self.name

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if not(instring[ loc ] in self.matchWhite):

+            raise ParseException(instring, loc, self.errmsg, self)

+        start = loc

+        loc += 1

+        maxloc = start + self.maxLen

+        maxloc = min( maxloc, len(instring) )

+        while loc < maxloc and instring[loc] in self.matchWhite:

+            loc += 1

+

+        if loc - start < self.minLen:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+

+class _PositionToken(Token):

+    def __init__( self ):

+        super(_PositionToken,self).__init__()

+        self.name=self.__class__.__name__

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+

+class GoToColumn(_PositionToken):

+    """

+    Token to advance to a specific column of input text; useful for tabular report scraping.

+    """

+    def __init__( self, colno ):

+        super(GoToColumn,self).__init__()

+        self.col = colno

+

+    def preParse( self, instring, loc ):

+        if col(loc,instring) != self.col:

+            instrlen = len(instring)

+            if self.ignoreExprs:

+                loc = self._skipIgnorables( instring, loc )

+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :

+                loc += 1

+        return loc

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        thiscol = col( loc, instring )

+        if thiscol > self.col:

+            raise ParseException( instring, loc, "Text not in expected column", self )

+        newloc = loc + self.col - thiscol

+        ret = instring[ loc: newloc ]

+        return newloc, ret

+

+

+class LineStart(_PositionToken):

+    """

+    Matches if current position is at the beginning of a line within the parse string

+    

+    Example::

+    

+        test = '''\

+        AAA this line

+        AAA and this line

+          AAA but not this one

+        B AAA and definitely not this one

+        '''

+

+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):

+            print(t)

+    

+    Prints::

+        ['AAA', ' this line']

+        ['AAA', ' and this line']    

+

+    """

+    def __init__( self ):

+        super(LineStart,self).__init__()

+        self.errmsg = "Expected start of line"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if col(loc, instring) == 1:

+            return loc, []

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class LineEnd(_PositionToken):

+    """

+    Matches if current position is at the end of a line within the parse string

+    """

+    def __init__( self ):

+        super(LineEnd,self).__init__()

+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )

+        self.errmsg = "Expected end of line"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc<len(instring):

+            if instring[loc] == "\n":

+                return loc+1, "\n"

+            else:

+                raise ParseException(instring, loc, self.errmsg, self)

+        elif loc == len(instring):

+            return loc+1, []

+        else:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+class StringStart(_PositionToken):

+    """

+    Matches if current position is at the beginning of the parse string

+    """

+    def __init__( self ):

+        super(StringStart,self).__init__()

+        self.errmsg = "Expected start of text"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc != 0:

+            # see if entire string up to here is just whitespace and ignoreables

+            if loc != self.preParse( instring, 0 ):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+class StringEnd(_PositionToken):

+    """

+    Matches if current position is at the end of the parse string

+    """

+    def __init__( self ):

+        super(StringEnd,self).__init__()

+        self.errmsg = "Expected end of text"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc < len(instring):

+            raise ParseException(instring, loc, self.errmsg, self)

+        elif loc == len(instring):

+            return loc+1, []

+        elif loc > len(instring):

+            return loc, []

+        else:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+class WordStart(_PositionToken):

+    """

+    Matches if the current position is at the beginning of a Word, and

+    is not preceded by any character in a given set of C{wordChars}

+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,

+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of

+    the string being parsed, or at the beginning of a line.

+    """

+    def __init__(self, wordChars = printables):

+        super(WordStart,self).__init__()

+        self.wordChars = set(wordChars)

+        self.errmsg = "Not at the start of a word"

+

+    def parseImpl(self, instring, loc, doActions=True ):

+        if loc != 0:

+            if (instring[loc-1] in self.wordChars or

+                instring[loc] not in self.wordChars):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+class WordEnd(_PositionToken):

+    """

+    Matches if the current position is at the end of a Word, and

+    is not followed by any character in a given set of C{wordChars}

+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,

+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of

+    the string being parsed, or at the end of a line.

+    """

+    def __init__(self, wordChars = printables):

+        super(WordEnd,self).__init__()

+        self.wordChars = set(wordChars)

+        self.skipWhitespace = False

+        self.errmsg = "Not at the end of a word"

+

+    def parseImpl(self, instring, loc, doActions=True ):

+        instrlen = len(instring)

+        if instrlen>0 and loc<instrlen:

+            if (instring[loc] in self.wordChars or

+                instring[loc-1] not in self.wordChars):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+

+class ParseExpression(ParserElement):

+    """

+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(ParseExpression,self).__init__(savelist)

+        if isinstance( exprs, _generatorType ):

+            exprs = list(exprs)

+

+        if isinstance( exprs, basestring ):

+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]

+        elif isinstance( exprs, Iterable ):

+            exprs = list(exprs)

+            # if sequence of strings provided, wrap with Literal

+            if all(isinstance(expr, basestring) for expr in exprs):

+                exprs = map(ParserElement._literalStringClass, exprs)

+            self.exprs = list(exprs)

+        else:

+            try:

+                self.exprs = list( exprs )

+            except TypeError:

+                self.exprs = [ exprs ]

+        self.callPreparse = False

+

+    def __getitem__( self, i ):

+        return self.exprs[i]

+

+    def append( self, other ):

+        self.exprs.append( other )

+        self.strRepr = None

+        return self

+

+    def leaveWhitespace( self ):

+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on

+           all contained expressions."""

+        self.skipWhitespace = False

+        self.exprs = [ e.copy() for e in self.exprs ]

+        for e in self.exprs:

+            e.leaveWhitespace()

+        return self

+

+    def ignore( self, other ):

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                super( ParseExpression, self).ignore( other )

+                for e in self.exprs:

+                    e.ignore( self.ignoreExprs[-1] )

+        else:

+            super( ParseExpression, self).ignore( other )

+            for e in self.exprs:

+                e.ignore( self.ignoreExprs[-1] )

+        return self

+

+    def __str__( self ):

+        try:

+            return super(ParseExpression,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )

+        return self.strRepr

+

+    def streamline( self ):

+        super(ParseExpression,self).streamline()

+

+        for e in self.exprs:

+            e.streamline()

+

+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )

+        # but only if there are no parse actions or resultsNames on the nested And's

+        # (likewise for Or's and MatchFirst's)

+        if ( len(self.exprs) == 2 ):

+            other = self.exprs[0]

+            if ( isinstance( other, self.__class__ ) and

+                  not(other.parseAction) and

+                  other.resultsName is None and

+                  not other.debug ):

+                self.exprs = other.exprs[:] + [ self.exprs[1] ]

+                self.strRepr = None

+                self.mayReturnEmpty |= other.mayReturnEmpty

+                self.mayIndexError  |= other.mayIndexError

+

+            other = self.exprs[-1]

+            if ( isinstance( other, self.__class__ ) and

+                  not(other.parseAction) and

+                  other.resultsName is None and

+                  not other.debug ):

+                self.exprs = self.exprs[:-1] + other.exprs[:]

+                self.strRepr = None

+                self.mayReturnEmpty |= other.mayReturnEmpty

+                self.mayIndexError  |= other.mayIndexError

+

+        self.errmsg = "Expected " + _ustr(self)

+        

+        return self

+

+    def setResultsName( self, name, listAllMatches=False ):

+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)

+        return ret

+

+    def validate( self, validateTrace=[] ):

+        tmp = validateTrace[:]+[self]

+        for e in self.exprs:

+            e.validate(tmp)

+        self.checkRecursion( [] )

+        

+    def copy(self):

+        ret = super(ParseExpression,self).copy()

+        ret.exprs = [e.copy() for e in self.exprs]

+        return ret

+

+class And(ParseExpression):

+    """

+    Requires all given C{ParseExpression}s to be found in the given order.

+    Expressions may be separated by whitespace.

+    May be constructed using the C{'+'} operator.

+    May also be constructed using the C{'-'} operator, which will suppress backtracking.

+

+    Example::

+        integer = Word(nums)

+        name_expr = OneOrMore(Word(alphas))

+

+        expr = And([integer("id"),name_expr("name"),integer("age")])

+        # more easily written as:

+        expr = integer("id") + name_expr("name") + integer("age")

+    """

+

+    class _ErrorStop(Empty):

+        def __init__(self, *args, **kwargs):

+            super(And._ErrorStop,self).__init__(*args, **kwargs)

+            self.name = '-'

+            self.leaveWhitespace()

+

+    def __init__( self, exprs, savelist = True ):

+        super(And,self).__init__(exprs, savelist)

+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)

+        self.setWhitespaceChars( self.exprs[0].whiteChars )

+        self.skipWhitespace = self.exprs[0].skipWhitespace

+        self.callPreparse = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        # pass False as last arg to _parse for first element, since we already

+        # pre-parsed the string as part of our And pre-parsing

+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )

+        errorStop = False

+        for e in self.exprs[1:]:

+            if isinstance(e, And._ErrorStop):

+                errorStop = True

+                continue

+            if errorStop:

+                try:

+                    loc, exprtokens = e._parse( instring, loc, doActions )

+                except ParseSyntaxException:

+                    raise

+                except ParseBaseException as pe:

+                    pe.__traceback__ = None

+                    raise ParseSyntaxException._from_exception(pe)

+                except IndexError:

+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)

+            else:

+                loc, exprtokens = e._parse( instring, loc, doActions )

+            if exprtokens or exprtokens.haskeys():

+                resultlist += exprtokens

+        return loc, resultlist

+

+    def __iadd__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #And( [ self, other ] )

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+            if not e.mayReturnEmpty:

+                break

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+

+class Or(ParseExpression):

+    """

+    Requires that at least one C{ParseExpression} is found.

+    If two expressions match, the expression that matches the longest string will be used.

+    May be constructed using the C{'^'} operator.

+

+    Example::

+        # construct Or using '^' operator

+        

+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))

+        print(number.searchString("123 3.1416 789"))

+    prints::

+        [['123'], ['3.1416'], ['789']]

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(Or,self).__init__(exprs, savelist)

+        if self.exprs:

+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)

+        else:

+            self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        maxExcLoc = -1

+        maxException = None

+        matches = []

+        for e in self.exprs:

+            try:

+                loc2 = e.tryParse( instring, loc )

+            except ParseException as err:

+                err.__traceback__ = None

+                if err.loc > maxExcLoc:

+                    maxException = err

+                    maxExcLoc = err.loc

+            except IndexError:

+                if len(instring) > maxExcLoc:

+                    maxException = ParseException(instring,len(instring),e.errmsg,self)

+                    maxExcLoc = len(instring)

+            else:

+                # save match among all matches, to retry longest to shortest

+                matches.append((loc2, e))

+

+        if matches:

+            matches.sort(key=lambda x: -x[0])

+            for _,e in matches:

+                try:

+                    return e._parse( instring, loc, doActions )

+                except ParseException as err:

+                    err.__traceback__ = None

+                    if err.loc > maxExcLoc:

+                        maxException = err

+                        maxExcLoc = err.loc

+

+        if maxException is not None:

+            maxException.msg = self.errmsg

+            raise maxException

+        else:

+            raise ParseException(instring, loc, "no defined alternatives to match", self)

+

+

+    def __ixor__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #Or( [ self, other ] )

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class MatchFirst(ParseExpression):

+    """

+    Requires that at least one C{ParseExpression} is found.

+    If two expressions match, the first one listed is the one that will match.

+    May be constructed using the C{'|'} operator.

+

+    Example::

+        # construct MatchFirst using '|' operator

+        

+        # watch the order of expressions to match

+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))

+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]

+

+        # put more selective expression first

+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)

+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(MatchFirst,self).__init__(exprs, savelist)

+        if self.exprs:

+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)

+        else:

+            self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        maxExcLoc = -1

+        maxException = None

+        for e in self.exprs:

+            try:

+                ret = e._parse( instring, loc, doActions )

+                return ret

+            except ParseException as err:

+                if err.loc > maxExcLoc:

+                    maxException = err

+                    maxExcLoc = err.loc

+            except IndexError:

+                if len(instring) > maxExcLoc:

+                    maxException = ParseException(instring,len(instring),e.errmsg,self)

+                    maxExcLoc = len(instring)

+

+        # only got here if no expression matched, raise exception for match that made it the furthest

+        else:

+            if maxException is not None:

+                maxException.msg = self.errmsg

+                raise maxException

+            else:

+                raise ParseException(instring, loc, "no defined alternatives to match", self)

+

+    def __ior__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #MatchFirst( [ self, other ] )

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class Each(ParseExpression):

+    """

+    Requires all given C{ParseExpression}s to be found, but in any order.

+    Expressions may be separated by whitespace.

+    May be constructed using the C{'&'} operator.

+

+    Example::

+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")

+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")

+        integer = Word(nums)

+        shape_attr = "shape:" + shape_type("shape")

+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")

+        color_attr = "color:" + color("color")

+        size_attr = "size:" + integer("size")

+

+        # use Each (using operator '&') to accept attributes in any order 

+        # (shape and posn are required, color and size are optional)

+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)

+

+        shape_spec.runTests('''

+            shape: SQUARE color: BLACK posn: 100, 120

+            shape: CIRCLE size: 50 color: BLUE posn: 50,80

+            color:GREEN size:20 shape:TRIANGLE posn:20,40

+            '''

+            )

+    prints::

+        shape: SQUARE color: BLACK posn: 100, 120

+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]

+        - color: BLACK

+        - posn: ['100', ',', '120']

+          - x: 100

+          - y: 120

+        - shape: SQUARE

+

+

+        shape: CIRCLE size: 50 color: BLUE posn: 50,80

+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]

+        - color: BLUE

+        - posn: ['50', ',', '80']

+          - x: 50

+          - y: 80

+        - shape: CIRCLE

+        - size: 50

+

+

+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40

+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]

+        - color: GREEN

+        - posn: ['20', ',', '40']

+          - x: 20

+          - y: 40

+        - shape: TRIANGLE

+        - size: 20

+    """

+    def __init__( self, exprs, savelist = True ):

+        super(Each,self).__init__(exprs, savelist)

+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)

+        self.skipWhitespace = True

+        self.initExprGroups = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.initExprGroups:

+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))

+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]

+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]

+            self.optionals = opt1 + opt2

+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]

+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]

+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]

+            self.required += self.multirequired

+            self.initExprGroups = False

+        tmpLoc = loc

+        tmpReqd = self.required[:]

+        tmpOpt  = self.optionals[:]

+        matchOrder = []

+

+        keepMatching = True

+        while keepMatching:

+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired

+            failed = []

+            for e in tmpExprs:

+                try:

+                    tmpLoc = e.tryParse( instring, tmpLoc )

+                except ParseException:

+                    failed.append(e)

+                else:

+                    matchOrder.append(self.opt1map.get(id(e),e))

+                    if e in tmpReqd:

+                        tmpReqd.remove(e)

+                    elif e in tmpOpt:

+                        tmpOpt.remove(e)

+            if len(failed) == len(tmpExprs):

+                keepMatching = False

+

+        if tmpReqd:

+            missing = ", ".join(_ustr(e) for e in tmpReqd)

+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )

+

+        # add any unmatched Optionals, in case they have default values defined

+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]

+

+        resultlist = []

+        for e in matchOrder:

+            loc,results = e._parse(instring,loc,doActions)

+            resultlist.append(results)

+

+        finalResults = sum(resultlist, ParseResults([]))

+        return loc, finalResults

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class ParseElementEnhance(ParserElement):

+    """

+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.

+    """

+    def __init__( self, expr, savelist=False ):

+        super(ParseElementEnhance,self).__init__(savelist)

+        if isinstance( expr, basestring ):

+            if issubclass(ParserElement._literalStringClass, Token):

+                expr = ParserElement._literalStringClass(expr)

+            else:

+                expr = ParserElement._literalStringClass(Literal(expr))

+        self.expr = expr

+        self.strRepr = None

+        if expr is not None:

+            self.mayIndexError = expr.mayIndexError

+            self.mayReturnEmpty = expr.mayReturnEmpty

+            self.setWhitespaceChars( expr.whiteChars )

+            self.skipWhitespace = expr.skipWhitespace

+            self.saveAsList = expr.saveAsList

+            self.callPreparse = expr.callPreparse

+            self.ignoreExprs.extend(expr.ignoreExprs)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.expr is not None:

+            return self.expr._parse( instring, loc, doActions, callPreParse=False )

+        else:

+            raise ParseException("",loc,self.errmsg,self)

+

+    def leaveWhitespace( self ):

+        self.skipWhitespace = False

+        self.expr = self.expr.copy()

+        if self.expr is not None:

+            self.expr.leaveWhitespace()

+        return self

+

+    def ignore( self, other ):

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                super( ParseElementEnhance, self).ignore( other )

+                if self.expr is not None:

+                    self.expr.ignore( self.ignoreExprs[-1] )

+        else:

+            super( ParseElementEnhance, self).ignore( other )

+            if self.expr is not None:

+                self.expr.ignore( self.ignoreExprs[-1] )

+        return self

+

+    def streamline( self ):

+        super(ParseElementEnhance,self).streamline()

+        if self.expr is not None:

+            self.expr.streamline()

+        return self

+

+    def checkRecursion( self, parseElementList ):

+        if self in parseElementList:

+            raise RecursiveGrammarException( parseElementList+[self] )

+        subRecCheckList = parseElementList[:] + [ self ]

+        if self.expr is not None:

+            self.expr.checkRecursion( subRecCheckList )

+

+    def validate( self, validateTrace=[] ):

+        tmp = validateTrace[:]+[self]

+        if self.expr is not None:

+            self.expr.validate(tmp)

+        self.checkRecursion( [] )

+

+    def __str__( self ):

+        try:

+            return super(ParseElementEnhance,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None and self.expr is not None:

+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )

+        return self.strRepr

+

+

+class FollowedBy(ParseElementEnhance):

+    """

+    Lookahead matching of the given parse expression.  C{FollowedBy}

+    does I{not} advance the parsing position within the input string, it only

+    verifies that the specified parse expression matches at the current

+    position.  C{FollowedBy} always returns a null token list.

+

+    Example::

+        # use FollowedBy to match a label only if it is followed by a ':'

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        

+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()

+    prints::

+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]

+    """

+    def __init__( self, expr ):

+        super(FollowedBy,self).__init__(expr)

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        self.expr.tryParse( instring, loc )

+        return loc, []

+

+

+class NotAny(ParseElementEnhance):

+    """

+    Lookahead to disallow matching with the given parse expression.  C{NotAny}

+    does I{not} advance the parsing position within the input string, it only

+    verifies that the specified parse expression does I{not} match at the current

+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}

+    always returns a null token list.  May be constructed using the '~' operator.

+

+    Example::

+        

+    """

+    def __init__( self, expr ):

+        super(NotAny,self).__init__(expr)

+        #~ self.leaveWhitespace()

+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs

+        self.mayReturnEmpty = True

+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.expr.canParseNext(instring, loc):

+            raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "~{" + _ustr(self.expr) + "}"

+

+        return self.strRepr

+

+class _MultipleMatch(ParseElementEnhance):

+    def __init__( self, expr, stopOn=None):

+        super(_MultipleMatch, self).__init__(expr)

+        self.saveAsList = True

+        ender = stopOn

+        if isinstance(ender, basestring):

+            ender = ParserElement._literalStringClass(ender)

+        self.not_ender = ~ender if ender is not None else None

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        self_expr_parse = self.expr._parse

+        self_skip_ignorables = self._skipIgnorables

+        check_ender = self.not_ender is not None

+        if check_ender:

+            try_not_ender = self.not_ender.tryParse

+        

+        # must be at least one (but first see if we are the stopOn sentinel;

+        # if so, fail)

+        if check_ender:

+            try_not_ender(instring, loc)

+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )

+        try:

+            hasIgnoreExprs = (not not self.ignoreExprs)

+            while 1:

+                if check_ender:

+                    try_not_ender(instring, loc)

+                if hasIgnoreExprs:

+                    preloc = self_skip_ignorables( instring, loc )

+                else:

+                    preloc = loc

+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )

+                if tmptokens or tmptokens.haskeys():

+                    tokens += tmptokens

+        except (ParseException,IndexError):

+            pass

+

+        return loc, tokens

+        

+class OneOrMore(_MultipleMatch):

+    """

+    Repetition of one or more of the given expression.

+    

+    Parameters:

+     - expr - expression that must match one or more times

+     - stopOn - (default=C{None}) - expression for a terminating sentinel

+          (only required if the sentinel would ordinarily match the repetition 

+          expression)          

+

+    Example::

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))

+

+        text = "shape: SQUARE posn: upper left color: BLACK"

+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]

+

+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]

+        

+        # could also be written as

+        (attr_expr * (1,)).parseString(text).pprint()

+    """

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + _ustr(self.expr) + "}..."

+

+        return self.strRepr

+

+class ZeroOrMore(_MultipleMatch):

+    """

+    Optional repetition of zero or more of the given expression.

+    

+    Parameters:

+     - expr - expression that must match zero or more times

+     - stopOn - (default=C{None}) - expression for a terminating sentinel

+          (only required if the sentinel would ordinarily match the repetition 

+          expression)          

+

+    Example: similar to L{OneOrMore}

+    """

+    def __init__( self, expr, stopOn=None):

+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)

+        self.mayReturnEmpty = True

+        

+    def parseImpl( self, instring, loc, doActions=True ):

+        try:

+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)

+        except (ParseException,IndexError):

+            return loc, []

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "[" + _ustr(self.expr) + "]..."

+

+        return self.strRepr

+

+class _NullToken(object):

+    def __bool__(self):

+        return False

+    __nonzero__ = __bool__

+    def __str__(self):

+        return ""

+

+_optionalNotMatched = _NullToken()

+class Optional(ParseElementEnhance):

+    """

+    Optional matching of the given expression.

+

+    Parameters:

+     - expr - expression that must match zero or more times

+     - default (optional) - value to be returned if the optional expression is not found.

+

+    Example::

+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier

+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))

+        zip.runTests('''

+            # traditional ZIP code

+            12345

+            

+            # ZIP+4 form

+            12101-0001

+            

+            # invalid ZIP

+            98765-

+            ''')

+    prints::

+        # traditional ZIP code

+        12345

+        ['12345']

+

+        # ZIP+4 form

+        12101-0001

+        ['12101-0001']

+

+        # invalid ZIP

+        98765-

+             ^

+        FAIL: Expected end of text (at char 5), (line:1, col:6)

+    """

+    def __init__( self, expr, default=_optionalNotMatched ):

+        super(Optional,self).__init__( expr, savelist=False )

+        self.saveAsList = self.expr.saveAsList

+        self.defaultValue = default

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        try:

+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )

+        except (ParseException,IndexError):

+            if self.defaultValue is not _optionalNotMatched:

+                if self.expr.resultsName:

+                    tokens = ParseResults([ self.defaultValue ])

+                    tokens[self.expr.resultsName] = self.defaultValue

+                else:

+                    tokens = [ self.defaultValue ]

+            else:

+                tokens = []

+        return loc, tokens

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "[" + _ustr(self.expr) + "]"

+

+        return self.strRepr

+

+class SkipTo(ParseElementEnhance):

+    """

+    Token for skipping over all undefined text until the matched expression is found.

+

+    Parameters:

+     - expr - target expression marking the end of the data to be skipped

+     - include - (default=C{False}) if True, the target expression is also parsed 

+          (the skipped text and target expression are returned as a 2-element list).

+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 

+          comments) that might contain false matches to the target expression

+     - failOn - (default=C{None}) define expressions that are not allowed to be 

+          included in the skipped test; if found before the target expression is found, 

+          the SkipTo is not a match

+

+    Example::

+        report = '''

+            Outstanding Issues Report - 1 Jan 2000

+

+               # | Severity | Description                               |  Days Open

+            -----+----------+-------------------------------------------+-----------

+             101 | Critical | Intermittent system crash                 |          6

+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14

+              79 | Minor    | System slow when running too many reports |         47

+            '''

+        integer = Word(nums)

+        SEP = Suppress('|')

+        # use SkipTo to simply match everything up until the next SEP

+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match

+        # - parse action will call token.strip() for each matched token, i.e., the description body

+        string_data = SkipTo(SEP, ignore=quotedString)

+        string_data.setParseAction(tokenMap(str.strip))

+        ticket_expr = (integer("issue_num") + SEP 

+                      + string_data("sev") + SEP 

+                      + string_data("desc") + SEP 

+                      + integer("days_open"))

+        

+        for tkt in ticket_expr.searchString(report):

+            print tkt.dump()

+    prints::

+        ['101', 'Critical', 'Intermittent system crash', '6']

+        - days_open: 6

+        - desc: Intermittent system crash

+        - issue_num: 101

+        - sev: Critical

+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']

+        - days_open: 14

+        - desc: Spelling error on Login ('log|n')

+        - issue_num: 94

+        - sev: Cosmetic

+        ['79', 'Minor', 'System slow when running too many reports', '47']

+        - days_open: 47

+        - desc: System slow when running too many reports

+        - issue_num: 79

+        - sev: Minor

+    """

+    def __init__( self, other, include=False, ignore=None, failOn=None ):

+        super( SkipTo, self ).__init__( other )

+        self.ignoreExpr = ignore

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+        self.includeMatch = include

+        self.asList = False

+        if isinstance(failOn, basestring):

+            self.failOn = ParserElement._literalStringClass(failOn)

+        else:

+            self.failOn = failOn

+        self.errmsg = "No match found for "+_ustr(self.expr)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        startloc = loc

+        instrlen = len(instring)

+        expr = self.expr

+        expr_parse = self.expr._parse

+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None

+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None

+        

+        tmploc = loc

+        while tmploc <= instrlen:

+            if self_failOn_canParseNext is not None:

+                # break if failOn expression matches

+                if self_failOn_canParseNext(instring, tmploc):

+                    break

+                    

+            if self_ignoreExpr_tryParse is not None:

+                # advance past ignore expressions

+                while 1:

+                    try:

+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)

+                    except ParseBaseException:

+                        break

+            

+            try:

+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)

+            except (ParseException, IndexError):

+                # no match, advance loc in string

+                tmploc += 1

+            else:

+                # matched skipto expr, done

+                break

+

+        else:

+            # ran off the end of the input string without matching skipto expr, fail

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        # build up return values

+        loc = tmploc

+        skiptext = instring[startloc:loc]

+        skipresult = ParseResults(skiptext)

+        

+        if self.includeMatch:

+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)

+            skipresult += mat

+

+        return loc, skipresult

+

+class Forward(ParseElementEnhance):

+    """

+    Forward declaration of an expression to be defined later -

+    used for recursive grammars, such as algebraic infix notation.

+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.

+

+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.

+    Specifically, '|' has a lower precedence than '<<', so that::

+        fwdExpr << a | b | c

+    will actually be evaluated as::

+        (fwdExpr << a) | b | c

+    thereby leaving b and c out as parseable alternatives.  It is recommended that you

+    explicitly group the values inserted into the C{Forward}::

+        fwdExpr << (a | b | c)

+    Converting to use the '<<=' operator instead will avoid this problem.

+

+    See L{ParseResults.pprint} for an example of a recursive parser created using

+    C{Forward}.

+    """

+    def __init__( self, other=None ):

+        super(Forward,self).__init__( other, savelist=False )

+

+    def __lshift__( self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass(other)

+        self.expr = other

+        self.strRepr = None

+        self.mayIndexError = self.expr.mayIndexError

+        self.mayReturnEmpty = self.expr.mayReturnEmpty

+        self.setWhitespaceChars( self.expr.whiteChars )

+        self.skipWhitespace = self.expr.skipWhitespace

+        self.saveAsList = self.expr.saveAsList

+        self.ignoreExprs.extend(self.expr.ignoreExprs)

+        return self

+        

+    def __ilshift__(self, other):

+        return self << other

+    

+    def leaveWhitespace( self ):

+        self.skipWhitespace = False

+        return self

+

+    def streamline( self ):

+        if not self.streamlined:

+            self.streamlined = True

+            if self.expr is not None:

+                self.expr.streamline()

+        return self

+

+    def validate( self, validateTrace=[] ):

+        if self not in validateTrace:

+            tmp = validateTrace[:]+[self]

+            if self.expr is not None:

+                self.expr.validate(tmp)

+        self.checkRecursion([])

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+        return self.__class__.__name__ + ": ..."

+

+        # stubbed out for now - creates awful memory and perf issues

+        self._revertClass = self.__class__

+        self.__class__ = _ForwardNoRecurse

+        try:

+            if self.expr is not None:

+                retString = _ustr(self.expr)

+            else:

+                retString = "None"

+        finally:

+            self.__class__ = self._revertClass

+        return self.__class__.__name__ + ": " + retString

+

+    def copy(self):

+        if self.expr is not None:

+            return super(Forward,self).copy()

+        else:

+            ret = Forward()

+            ret <<= self

+            return ret

+

+class _ForwardNoRecurse(Forward):

+    def __str__( self ):

+        return "..."

+

+class TokenConverter(ParseElementEnhance):

+    """

+    Abstract subclass of C{ParseExpression}, for converting parsed results.

+    """

+    def __init__( self, expr, savelist=False ):

+        super(TokenConverter,self).__init__( expr )#, savelist )

+        self.saveAsList = False

+

+class Combine(TokenConverter):

+    """

+    Converter to concatenate all matching tokens to a single string.

+    By default, the matching patterns must also be contiguous in the input string;

+    this can be disabled by specifying C{'adjacent=False'} in the constructor.

+

+    Example::

+        real = Word(nums) + '.' + Word(nums)

+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']

+        # will also erroneously match the following

+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']

+

+        real = Combine(Word(nums) + '.' + Word(nums))

+        print(real.parseString('3.1416')) # -> ['3.1416']

+        # no match when there are internal spaces

+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)

+    """

+    def __init__( self, expr, joinString="", adjacent=True ):

+        super(Combine,self).__init__( expr )

+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself

+        if adjacent:

+            self.leaveWhitespace()

+        self.adjacent = adjacent

+        self.skipWhitespace = True

+        self.joinString = joinString

+        self.callPreparse = True

+

+    def ignore( self, other ):

+        if self.adjacent:

+            ParserElement.ignore(self, other)

+        else:

+            super( Combine, self).ignore( other )

+        return self

+

+    def postParse( self, instring, loc, tokenlist ):

+        retToks = tokenlist.copy()

+        del retToks[:]

+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)

+

+        if self.resultsName and retToks.haskeys():

+            return [ retToks ]

+        else:

+            return retToks

+

+class Group(TokenConverter):

+    """

+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.

+

+    Example::

+        ident = Word(alphas)

+        num = Word(nums)

+        term = ident | num

+        func = ident + Optional(delimitedList(term))

+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']

+

+        func = ident + Group(Optional(delimitedList(term)))

+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]

+    """

+    def __init__( self, expr ):

+        super(Group,self).__init__( expr )

+        self.saveAsList = True

+

+    def postParse( self, instring, loc, tokenlist ):

+        return [ tokenlist ]

+

+class Dict(TokenConverter):

+    """

+    Converter to return a repetitive expression as a list, but also as a dictionary.

+    Each element can also be referenced using the first token in the expression as its key.

+    Useful for tabular report scraping when the first column can be used as a item key.

+

+    Example::

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))

+

+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"

+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        

+        # print attributes as plain groups

+        print(OneOrMore(attr_expr).parseString(text).dump())

+        

+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names

+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)

+        print(result.dump())

+        

+        # access named fields as dict entries, or output as dict

+        print(result['shape'])        

+        print(result.asDict())

+    prints::

+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']

+

+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]

+        - color: light blue

+        - posn: upper left

+        - shape: SQUARE

+        - texture: burlap

+        SQUARE

+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}

+    See more examples at L{ParseResults} of accessing fields by results name.

+    """

+    def __init__( self, expr ):

+        super(Dict,self).__init__( expr )

+        self.saveAsList = True

+

+    def postParse( self, instring, loc, tokenlist ):

+        for i,tok in enumerate(tokenlist):

+            if len(tok) == 0:

+                continue

+            ikey = tok[0]

+            if isinstance(ikey,int):

+                ikey = _ustr(tok[0]).strip()

+            if len(tok)==1:

+                tokenlist[ikey] = _ParseResultsWithOffset("",i)

+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):

+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)

+            else:

+                dictvalue = tok.copy() #ParseResults(i)

+                del dictvalue[0]

+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):

+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)

+                else:

+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)

+

+        if self.resultsName:

+            return [ tokenlist ]

+        else:

+            return tokenlist

+

+

+class Suppress(TokenConverter):

+    """

+    Converter for ignoring the results of a parsed expression.

+

+    Example::

+        source = "a, b, c,d"

+        wd = Word(alphas)

+        wd_list1 = wd + ZeroOrMore(',' + wd)

+        print(wd_list1.parseString(source))

+

+        # often, delimiters that are useful during parsing are just in the

+        # way afterward - use Suppress to keep them out of the parsed output

+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)

+        print(wd_list2.parseString(source))

+    prints::

+        ['a', ',', 'b', ',', 'c', ',', 'd']

+        ['a', 'b', 'c', 'd']

+    (See also L{delimitedList}.)

+    """

+    def postParse( self, instring, loc, tokenlist ):

+        return []

+

+    def suppress( self ):

+        return self

+

+

+class OnlyOnce(object):

+    """

+    Wrapper for parse actions, to ensure they are only called once.

+    """

+    def __init__(self, methodCall):

+        self.callable = _trim_arity(methodCall)

+        self.called = False

+    def __call__(self,s,l,t):

+        if not self.called:

+            results = self.callable(s,l,t)

+            self.called = True

+            return results

+        raise ParseException(s,l,"")

+    def reset(self):

+        self.called = False

+

+def traceParseAction(f):

+    """

+    Decorator for debugging parse actions. 

+    

+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}

+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.

+

+    Example::

+        wd = Word(alphas)

+

+        @traceParseAction

+        def remove_duplicate_chars(tokens):

+            return ''.join(sorted(set(''.join(tokens))))

+

+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)

+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))

+    prints::

+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))

+        <<leaving remove_duplicate_chars (ret: 'dfjkls')

+        ['dfjkls']

+    """

+    f = _trim_arity(f)

+    def z(*paArgs):

+        thisFunc = f.__name__

+        s,l,t = paArgs[-3:]

+        if len(paArgs)>3:

+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc

+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )

+        try:

+            ret = f(*paArgs)

+        except Exception as exc:

+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )

+            raise

+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )

+        return ret

+    try:

+        z.__name__ = f.__name__

+    except AttributeError:

+        pass

+    return z

+

+#

+# global helpers

+#

+def delimitedList( expr, delim=",", combine=False ):

+    """

+    Helper to define a delimited list of expressions - the delimiter defaults to ','.

+    By default, the list elements and delimiters can have intervening whitespace, and

+    comments, but this can be overridden by passing C{combine=True} in the constructor.

+    If C{combine} is set to C{True}, the matching tokens are returned as a single token

+    string, with the delimiters included; otherwise, the matching tokens are returned

+    as a list of tokens, with the delimiters suppressed.

+

+    Example::

+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']

+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']

+    """

+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."

+    if combine:

+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)

+    else:

+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)

+

+def countedArray( expr, intExpr=None ):

+    """

+    Helper to define a counted list of expressions.

+    This helper defines a pattern of the form::

+        integer expr expr expr...

+    where the leading integer tells how many expr expressions follow.

+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.

+    

+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.

+

+    Example::

+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']

+

+        # in this parser, the leading integer value is given in binary,

+        # '10' indicating that 2 values are in the array

+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))

+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']

+    """

+    arrayExpr = Forward()

+    def countFieldParseAction(s,l,t):

+        n = t[0]

+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))

+        return []

+    if intExpr is None:

+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))

+    else:

+        intExpr = intExpr.copy()

+    intExpr.setName("arrayLen")

+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)

+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')

+

+def _flatten(L):

+    ret = []

+    for i in L:

+        if isinstance(i,list):

+            ret.extend(_flatten(i))

+        else:

+            ret.append(i)

+    return ret

+

+def matchPreviousLiteral(expr):

+    """

+    Helper to define an expression that is indirectly defined from

+    the tokens matched in a previous expression, that is, it looks

+    for a 'repeat' of a previous expression.  For example::

+        first = Word(nums)

+        second = matchPreviousLiteral(first)

+        matchExpr = first + ":" + second

+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a

+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.

+    If this is not desired, use C{matchPreviousExpr}.

+    Do I{not} use with packrat parsing enabled.

+    """

+    rep = Forward()

+    def copyTokenToRepeater(s,l,t):

+        if t:

+            if len(t) == 1:

+                rep << t[0]

+            else:

+                # flatten t tokens

+                tflat = _flatten(t.asList())

+                rep << And(Literal(tt) for tt in tflat)

+        else:

+            rep << Empty()

+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)

+    rep.setName('(prev) ' + _ustr(expr))

+    return rep

+

+def matchPreviousExpr(expr):

+    """

+    Helper to define an expression that is indirectly defined from

+    the tokens matched in a previous expression, that is, it looks

+    for a 'repeat' of a previous expression.  For example::

+        first = Word(nums)

+        second = matchPreviousExpr(first)

+        matchExpr = first + ":" + second

+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by

+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};

+    the expressions are evaluated first, and then compared, so

+    C{"1"} is compared with C{"10"}.

+    Do I{not} use with packrat parsing enabled.

+    """

+    rep = Forward()

+    e2 = expr.copy()

+    rep <<= e2

+    def copyTokenToRepeater(s,l,t):

+        matchTokens = _flatten(t.asList())

+        def mustMatchTheseTokens(s,l,t):

+            theseTokens = _flatten(t.asList())

+            if  theseTokens != matchTokens:

+                raise ParseException("",0,"")

+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )

+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)

+    rep.setName('(prev) ' + _ustr(expr))

+    return rep

+

+def _escapeRegexRangeChars(s):

+    #~  escape these chars: ^-]

+    for c in r"\^-]":

+        s = s.replace(c,_bslash+c)

+    s = s.replace("\n",r"\n")

+    s = s.replace("\t",r"\t")

+    return _ustr(s)

+

+def oneOf( strs, caseless=False, useRegex=True ):

+    """

+    Helper to quickly define a set of alternative Literals, and makes sure to do

+    longest-first testing when there is a conflict, regardless of the input order,

+    but returns a C{L{MatchFirst}} for best performance.

+

+    Parameters:

+     - strs - a string of space-delimited literals, or a collection of string literals

+     - caseless - (default=C{False}) - treat all literals as caseless

+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex

+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or

+          if creating a C{Regex} raises an exception)

+

+    Example::

+        comp_oper = oneOf("< = > <= >= !=")

+        var = Word(alphas)

+        number = Word(nums)

+        term = var | number

+        comparison_expr = term + comp_oper + term

+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))

+    prints::

+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]

+    """

+    if caseless:

+        isequal = ( lambda a,b: a.upper() == b.upper() )

+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )

+        parseElementClass = CaselessLiteral

+    else:

+        isequal = ( lambda a,b: a == b )

+        masks = ( lambda a,b: b.startswith(a) )

+        parseElementClass = Literal

+

+    symbols = []

+    if isinstance(strs,basestring):

+        symbols = strs.split()

+    elif isinstance(strs, Iterable):

+        symbols = list(strs)

+    else:

+        warnings.warn("Invalid argument to oneOf, expected string or iterable",

+                SyntaxWarning, stacklevel=2)

+    if not symbols:

+        return NoMatch()

+

+    i = 0

+    while i < len(symbols)-1:

+        cur = symbols[i]

+        for j,other in enumerate(symbols[i+1:]):

+            if ( isequal(other, cur) ):

+                del symbols[i+j+1]

+                break

+            elif ( masks(cur, other) ):

+                del symbols[i+j+1]

+                symbols.insert(i,other)

+                cur = other

+                break

+        else:

+            i += 1

+

+    if not caseless and useRegex:

+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))

+        try:

+            if len(symbols)==len("".join(symbols)):

+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))

+            else:

+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))

+        except Exception:

+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",

+                    SyntaxWarning, stacklevel=2)

+

+

+    # last resort, just use MatchFirst

+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))

+

+def dictOf( key, value ):

+    """

+    Helper to easily and clearly define a dictionary by specifying the respective patterns

+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens

+    in the proper order.  The key pattern can include delimiting markers or punctuation,

+    as long as they are suppressed, thereby leaving the significant key text.  The value

+    pattern can include named results, so that the C{Dict} results can include named token

+    fields.

+

+    Example::

+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"

+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        print(OneOrMore(attr_expr).parseString(text).dump())

+        

+        attr_label = label

+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)

+

+        # similar to Dict, but simpler call format

+        result = dictOf(attr_label, attr_value).parseString(text)

+        print(result.dump())

+        print(result['shape'])

+        print(result.shape)  # object attribute access works too

+        print(result.asDict())

+    prints::

+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]

+        - color: light blue

+        - posn: upper left

+        - shape: SQUARE

+        - texture: burlap

+        SQUARE

+        SQUARE

+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}

+    """

+    return Dict( ZeroOrMore( Group ( key + value ) ) )

+

+def originalTextFor(expr, asString=True):

+    """

+    Helper to return the original, untokenized text for a given expression.  Useful to

+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to

+    revert separate tokens with intervening whitespace back to the original matching

+    input text. By default, returns astring containing the original parsed text.  

+       

+    If the optional C{asString} argument is passed as C{False}, then the return value is a 

+    C{L{ParseResults}} containing any results names that were originally matched, and a 

+    single token containing the original matched text from the input string.  So if 

+    the expression passed to C{L{originalTextFor}} contains expressions with defined

+    results names, you must set C{asString} to C{False} if you want to preserve those

+    results name values.

+

+    Example::

+        src = "this is test <b> bold <i>text</i> </b> normal text "

+        for tag in ("b","i"):

+            opener,closer = makeHTMLTags(tag)

+            patt = originalTextFor(opener + SkipTo(closer) + closer)

+            print(patt.searchString(src)[0])

+    prints::

+        ['<b> bold <i>text</i> </b>']

+        ['<i>text</i>']

+    """

+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)

+    endlocMarker = locMarker.copy()

+    endlocMarker.callPreparse = False

+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")

+    if asString:

+        extractText = lambda s,l,t: s[t._original_start:t._original_end]

+    else:

+        def extractText(s,l,t):

+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]

+    matchExpr.setParseAction(extractText)

+    matchExpr.ignoreExprs = expr.ignoreExprs

+    return matchExpr

+

+def ungroup(expr): 

+    """

+    Helper to undo pyparsing's default grouping of And expressions, even

+    if all but one are non-empty.

+    """

+    return TokenConverter(expr).setParseAction(lambda t:t[0])

+

+def locatedExpr(expr):

+    """

+    Helper to decorate a returned token with its starting and ending locations in the input string.

+    This helper adds the following results names:

+     - locn_start = location where matched expression begins

+     - locn_end = location where matched expression ends

+     - value = the actual parsed results

+

+    Be careful if the input text contains C{<TAB>} characters, you may want to call

+    C{L{ParserElement.parseWithTabs}}

+

+    Example::

+        wd = Word(alphas)

+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):

+            print(match)

+    prints::

+        [[0, 'ljsdf', 5]]

+        [[8, 'lksdjjf', 15]]

+        [[18, 'lkkjj', 23]]

+    """

+    locator = Empty().setParseAction(lambda s,l,t: l)

+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))

+

+

+# convenience constants for positional expressions

+empty       = Empty().setName("empty")

+lineStart   = LineStart().setName("lineStart")

+lineEnd     = LineEnd().setName("lineEnd")

+stringStart = StringStart().setName("stringStart")

+stringEnd   = StringEnd().setName("stringEnd")

+

+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])

+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))

+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))

+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)

+_charRange = Group(_singleChar + Suppress("-") + _singleChar)

+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"

+

+def srange(s):

+    r"""

+    Helper to easily define string ranges for use in Word construction.  Borrows

+    syntax from regexp '[]' string range definitions::

+        srange("[0-9]")   -> "0123456789"

+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"

+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"

+    The input string must be enclosed in []'s, and the returned string is the expanded

+    character set joined into a single string.

+    The values enclosed in the []'s may be:

+     - a single character

+     - an escaped character with a leading backslash (such as C{\-} or C{\]})

+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 

+         (C{\0x##} is also supported for backwards compatibility) 

+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)

+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)

+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)

+    """

+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))

+    try:

+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)

+    except Exception:

+        return ""

+

+def matchOnlyAtCol(n):

+    """

+    Helper method for defining parse actions that require matching at a specific

+    column in the input text.

+    """

+    def verifyCol(strg,locn,toks):

+        if col(locn,strg) != n:

+            raise ParseException(strg,locn,"matched token not at column %d" % n)

+    return verifyCol

+

+def replaceWith(replStr):

+    """

+    Helper method for common parse actions that simply return a literal value.  Especially

+    useful when used with C{L{transformString<ParserElement.transformString>}()}.

+

+    Example::

+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))

+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))

+        term = na | num

+        

+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]

+    """

+    return lambda s,l,t: [replStr]

+

+def removeQuotes(s,l,t):

+    """

+    Helper parse action for removing quotation marks from parsed quoted strings.

+

+    Example::

+        # by default, quotation marks are included in parsed results

+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]

+

+        # use removeQuotes to strip quotation marks from parsed results

+        quotedString.setParseAction(removeQuotes)

+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]

+    """

+    return t[0][1:-1]

+

+def tokenMap(func, *args):

+    """

+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 

+    args are passed, they are forwarded to the given function as additional arguments after

+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the

+    parsed data to an integer using base 16.

+

+    Example (compare the last to example in L{ParserElement.transformString}::

+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))

+        hex_ints.runTests('''

+            00 11 22 aa FF 0a 0d 1a

+            ''')

+        

+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))

+        OneOrMore(upperword).runTests('''

+            my kingdom for a horse

+            ''')

+

+        wd = Word(alphas).setParseAction(tokenMap(str.title))

+        OneOrMore(wd).setParseAction(' '.join).runTests('''

+            now is the winter of our discontent made glorious summer by this sun of york

+            ''')

+    prints::

+        00 11 22 aa FF 0a 0d 1a

+        [0, 17, 34, 170, 255, 10, 13, 26]

+

+        my kingdom for a horse

+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']

+

+        now is the winter of our discontent made glorious summer by this sun of york

+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']

+    """

+    def pa(s,l,t):

+        return [func(tokn, *args) for tokn in t]

+

+    try:

+        func_name = getattr(func, '__name__', 

+                            getattr(func, '__class__').__name__)

+    except Exception:

+        func_name = str(func)

+    pa.__name__ = func_name

+

+    return pa

+

+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())

+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""

+

+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())

+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""

+    

+def _makeTags(tagStr, xml):

+    """Internal helper to construct opening and closing tag expressions, given a tag name"""

+    if isinstance(tagStr,basestring):

+        resname = tagStr

+        tagStr = Keyword(tagStr, caseless=not xml)

+    else:

+        resname = tagStr.name

+

+    tagAttrName = Word(alphas,alphanums+"_-:")

+    if (xml):

+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )

+        openTag = Suppress("<") + tagStr("tag") + \

+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \

+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")

+    else:

+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")

+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)

+        openTag = Suppress("<") + tagStr("tag") + \

+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \

+                Optional( Suppress("=") + tagAttrValue ) ))) + \

+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")

+    closeTag = Combine(_L("</") + tagStr + ">")

+

+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)

+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)

+    openTag.tag = resname

+    closeTag.tag = resname

+    return openTag, closeTag

+

+def makeHTMLTags(tagStr):

+    """

+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches

+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.

+

+    Example::

+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'

+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple

+        a,a_end = makeHTMLTags("A")

+        link_expr = a + SkipTo(a_end)("link_text") + a_end

+        

+        for link in link_expr.searchString(text):

+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results

+            print(link.link_text, '->', link.href)

+    prints::

+        pyparsing -> http://pyparsing.wikispaces.com

+    """

+    return _makeTags( tagStr, False )

+

+def makeXMLTags(tagStr):

+    """

+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches

+    tags only in the given upper/lower case.

+

+    Example: similar to L{makeHTMLTags}

+    """

+    return _makeTags( tagStr, True )

+

+def withAttribute(*args,**attrDict):

+    """

+    Helper to create a validating parse action to be used with start tags created

+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag

+    with a required attribute value, to avoid false matches on common tags such as

+    C{<TD>} or C{<DIV>}.

+

+    Call C{withAttribute} with a series of attribute names and values. Specify the list

+    of filter attributes names and values as:

+     - keyword arguments, as in C{(align="right")}, or

+     - as an explicit dict with C{**} operator, when an attribute name is also a Python

+          reserved word, as in C{**{"class":"Customer", "align":"right"}}

+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )

+    For attribute names with a namespace prefix, you must use the second form.  Attribute

+    names are matched insensitive to upper/lower case.

+       

+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.

+

+    To verify that the attribute exists, but without specifying a value, pass

+    C{withAttribute.ANY_VALUE} as the value.

+

+    Example::

+        html = '''

+            <div>

+            Some text

+            <div type="grid">1 4 0 1 0</div>

+            <div type="graph">1,3 2,3 1,1</div>

+            <div>this has no type</div>

+            </div>

+                

+        '''

+        div,div_end = makeHTMLTags("div")

+

+        # only match div tag having a type attribute with value "grid"

+        div_grid = div().setParseAction(withAttribute(type="grid"))

+        grid_expr = div_grid + SkipTo(div | div_end)("body")

+        for grid_header in grid_expr.searchString(html):

+            print(grid_header.body)

+        

+        # construct a match with any div tag having a type attribute, regardless of the value

+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))

+        div_expr = div_any_type + SkipTo(div | div_end)("body")

+        for div_header in div_expr.searchString(html):

+            print(div_header.body)

+    prints::

+        1 4 0 1 0

+

+        1 4 0 1 0

+        1,3 2,3 1,1

+    """

+    if args:

+        attrs = args[:]

+    else:

+        attrs = attrDict.items()

+    attrs = [(k,v) for k,v in attrs]

+    def pa(s,l,tokens):

+        for attrName,attrValue in attrs:

+            if attrName not in tokens:

+                raise ParseException(s,l,"no matching attribute " + attrName)

+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:

+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %

+                                            (attrName, tokens[attrName], attrValue))

+    return pa

+withAttribute.ANY_VALUE = object()

+

+def withClass(classname, namespace=''):

+    """

+    Simplified version of C{L{withAttribute}} when matching on a div class - made

+    difficult because C{class} is a reserved word in Python.

+

+    Example::

+        html = '''

+            <div>

+            Some text

+            <div class="grid">1 4 0 1 0</div>

+            <div class="graph">1,3 2,3 1,1</div>

+            <div>this &lt;div&gt; has no class</div>

+            </div>

+                

+        '''

+        div,div_end = makeHTMLTags("div")

+        div_grid = div().setParseAction(withClass("grid"))

+        

+        grid_expr = div_grid + SkipTo(div | div_end)("body")

+        for grid_header in grid_expr.searchString(html):

+            print(grid_header.body)

+        

+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))

+        div_expr = div_any_type + SkipTo(div | div_end)("body")

+        for div_header in div_expr.searchString(html):

+            print(div_header.body)

+    prints::

+        1 4 0 1 0

+

+        1 4 0 1 0

+        1,3 2,3 1,1

+    """

+    classattr = "%s:class" % namespace if namespace else "class"

+    return withAttribute(**{classattr : classname})        

+

+opAssoc = _Constants()

+opAssoc.LEFT = object()

+opAssoc.RIGHT = object()

+

+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):

+    """

+    Helper method for constructing grammars of expressions made up of

+    operators working in a precedence hierarchy.  Operators may be unary or

+    binary, left- or right-associative.  Parse actions can also be attached

+    to operator expressions. The generated parser will also recognize the use 

+    of parentheses to override operator precedences (see example below).

+    

+    Note: if you define a deep operator list, you may see performance issues

+    when using infixNotation. See L{ParserElement.enablePackrat} for a

+    mechanism to potentially improve your parser performance.

+

+    Parameters:

+     - baseExpr - expression representing the most basic element for the nested

+     - opList - list of tuples, one for each operator precedence level in the

+      expression grammar; each tuple is of the form

+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:

+       - opExpr is the pyparsing expression for the operator;

+          may also be a string, which will be converted to a Literal;

+          if numTerms is 3, opExpr is a tuple of two expressions, for the

+          two operators separating the 3 terms

+       - numTerms is the number of terms for this operator (must

+          be 1, 2, or 3)

+       - rightLeftAssoc is the indicator whether the operator is

+          right or left associative, using the pyparsing-defined

+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.

+       - parseAction is the parse action to be associated with

+          expressions matching this operator expression (the

+          parse action tuple member may be omitted); if the parse action

+          is passed a tuple or list of functions, this is equivalent to

+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})

+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})

+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})

+

+    Example::

+        # simple example of four-function arithmetic with ints and variable names

+        integer = pyparsing_common.signed_integer

+        varname = pyparsing_common.identifier 

+        

+        arith_expr = infixNotation(integer | varname,

+            [

+            ('-', 1, opAssoc.RIGHT),

+            (oneOf('* /'), 2, opAssoc.LEFT),

+            (oneOf('+ -'), 2, opAssoc.LEFT),

+            ])

+        

+        arith_expr.runTests('''

+            5+3*6

+            (5+3)*6

+            -2--11

+            ''', fullDump=False)

+    prints::

+        5+3*6

+        [[5, '+', [3, '*', 6]]]

+

+        (5+3)*6

+        [[[5, '+', 3], '*', 6]]

+

+        -2--11

+        [[['-', 2], '-', ['-', 11]]]

+    """

+    ret = Forward()

+    lastExpr = baseExpr | ( lpar + ret + rpar )

+    for i,operDef in enumerate(opList):

+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]

+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr

+        if arity == 3:

+            if opExpr is None or len(opExpr) != 2:

+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")

+            opExpr1, opExpr2 = opExpr

+        thisExpr = Forward().setName(termName)

+        if rightLeftAssoc == opAssoc.LEFT:

+            if arity == 1:

+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )

+            elif arity == 2:

+                if opExpr is not None:

+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )

+                else:

+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )

+            elif arity == 3:

+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \

+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )

+            else:

+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")

+        elif rightLeftAssoc == opAssoc.RIGHT:

+            if arity == 1:

+                # try to avoid LR with this extra test

+                if not isinstance(opExpr, Optional):

+                    opExpr = Optional(opExpr)

+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )

+            elif arity == 2:

+                if opExpr is not None:

+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )

+                else:

+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )

+            elif arity == 3:

+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \

+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )

+            else:

+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")

+        else:

+            raise ValueError("operator must indicate right or left associativity")

+        if pa:

+            if isinstance(pa, (tuple, list)):

+                matchExpr.setParseAction(*pa)

+            else:

+                matchExpr.setParseAction(pa)

+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )

+        lastExpr = thisExpr

+    ret <<= lastExpr

+    return ret

+

+operatorPrecedence = infixNotation

+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""

+

+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")

+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")

+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|

+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")

+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")

+

+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):

+    """

+    Helper method for defining nested lists enclosed in opening and closing

+    delimiters ("(" and ")" are the default).

+

+    Parameters:

+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression

+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression

+     - content - expression for items within the nested lists (default=C{None})

+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})

+

+    If an expression is not provided for the content argument, the nested

+    expression will capture all whitespace-delimited content between delimiters

+    as a list of separate values.

+

+    Use the C{ignoreExpr} argument to define expressions that may contain

+    opening or closing characters that should not be treated as opening

+    or closing characters for nesting, such as quotedString or a comment

+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.

+    The default is L{quotedString}, but if no expressions are to be ignored,

+    then pass C{None} for this argument.

+

+    Example::

+        data_type = oneOf("void int short long char float double")

+        decl_data_type = Combine(data_type + Optional(Word('*')))

+        ident = Word(alphas+'_', alphanums+'_')

+        number = pyparsing_common.number

+        arg = Group(decl_data_type + ident)

+        LPAR,RPAR = map(Suppress, "()")

+

+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))

+

+        c_function = (decl_data_type("type") 

+                      + ident("name")

+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 

+                      + code_body("body"))

+        c_function.ignore(cStyleComment)

+        

+        source_code = '''

+            int is_odd(int x) { 

+                return (x%2); 

+            }

+                

+            int dec_to_hex(char hchar) { 

+                if (hchar >= '0' && hchar <= '9') { 

+                    return (ord(hchar)-ord('0')); 

+                } else { 

+                    return (10+ord(hchar)-ord('A'));

+                } 

+            }

+        '''

+        for func in c_function.searchString(source_code):

+            print("%(name)s (%(type)s) args: %(args)s" % func)

+

+    prints::

+        is_odd (int) args: [['int', 'x']]

+        dec_to_hex (int) args: [['char', 'hchar']]

+    """

+    if opener == closer:

+        raise ValueError("opening and closing strings cannot be the same")

+    if content is None:

+        if isinstance(opener,basestring) and isinstance(closer,basestring):

+            if len(opener) == 1 and len(closer)==1:

+                if ignoreExpr is not None:

+                    content = (Combine(OneOrMore(~ignoreExpr +

+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+                else:

+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS

+                                ).setParseAction(lambda t:t[0].strip()))

+            else:

+                if ignoreExpr is not None:

+                    content = (Combine(OneOrMore(~ignoreExpr + 

+                                    ~Literal(opener) + ~Literal(closer) +

+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+                else:

+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +

+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+        else:

+            raise ValueError("opening and closing arguments must be strings if no content expression is given")

+    ret = Forward()

+    if ignoreExpr is not None:

+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )

+    else:

+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )

+    ret.setName('nested %s%s expression' % (opener,closer))

+    return ret

+

+def indentedBlock(blockStatementExpr, indentStack, indent=True):

+    """

+    Helper method for defining space-delimited indentation blocks, such as

+    those used to define block statements in Python source code.

+

+    Parameters:

+     - blockStatementExpr - expression defining syntax of statement that

+            is repeated within the indented block

+     - indentStack - list created by caller to manage indentation stack

+            (multiple statementWithIndentedBlock expressions within a single grammar

+            should share a common indentStack)

+     - indent - boolean indicating whether block must be indented beyond the

+            the current level; set to False for block of left-most statements

+            (default=C{True})

+

+    A valid block must contain at least one C{blockStatement}.

+

+    Example::

+        data = '''

+        def A(z):

+          A1

+          B = 100

+          G = A2

+          A2

+          A3

+        B

+        def BB(a,b,c):

+          BB1

+          def BBA():

+            bba1

+            bba2

+            bba3

+        C

+        D

+        def spam(x,y):

+             def eggs(z):

+                 pass

+        '''

+

+

+        indentStack = [1]

+        stmt = Forward()

+

+        identifier = Word(alphas, alphanums)

+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")

+        func_body = indentedBlock(stmt, indentStack)

+        funcDef = Group( funcDecl + func_body )

+

+        rvalue = Forward()

+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")

+        rvalue << (funcCall | identifier | Word(nums))

+        assignment = Group(identifier + "=" + rvalue)

+        stmt << ( funcDef | assignment | identifier )

+

+        module_body = OneOrMore(stmt)

+

+        parseTree = module_body.parseString(data)

+        parseTree.pprint()

+    prints::

+        [['def',

+          'A',

+          ['(', 'z', ')'],

+          ':',

+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],

+         'B',

+         ['def',

+          'BB',

+          ['(', 'a', 'b', 'c', ')'],

+          ':',

+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],

+         'C',

+         'D',

+         ['def',

+          'spam',

+          ['(', 'x', 'y', ')'],

+          ':',

+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 

+    """

+    def checkPeerIndent(s,l,t):

+        if l >= len(s): return

+        curCol = col(l,s)

+        if curCol != indentStack[-1]:

+            if curCol > indentStack[-1]:

+                raise ParseFatalException(s,l,"illegal nesting")

+            raise ParseException(s,l,"not a peer entry")

+

+    def checkSubIndent(s,l,t):

+        curCol = col(l,s)

+        if curCol > indentStack[-1]:

+            indentStack.append( curCol )

+        else:

+            raise ParseException(s,l,"not a subentry")

+

+    def checkUnindent(s,l,t):

+        if l >= len(s): return

+        curCol = col(l,s)

+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):

+            raise ParseException(s,l,"not an unindent")

+        indentStack.pop()

+

+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())

+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')

+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')

+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')

+    if indent:

+        smExpr = Group( Optional(NL) +

+            #~ FollowedBy(blockStatementExpr) +

+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)

+    else:

+        smExpr = Group( Optional(NL) +

+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )

+    blockStatementExpr.ignore(_bslash + LineEnd())

+    return smExpr.setName('indented block')

+

+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")

+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")

+

+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))

+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))

+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")

+def replaceHTMLEntity(t):

+    """Helper parser action to replace common HTML entities with their special characters"""

+    return _htmlEntityMap.get(t.entity)

+

+# it's easy to get these comment structures wrong - they're very common, so may as well make them available

+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")

+"Comment of the form C{/* ... */}"

+

+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")

+"Comment of the form C{<!-- ... -->}"

+

+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")

+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")

+"Comment of the form C{// ... (to end of line)}"

+

+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")

+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"

+

+javaStyleComment = cppStyleComment

+"Same as C{L{cppStyleComment}}"

+

+pythonStyleComment = Regex(r"#.*").setName("Python style comment")

+"Comment of the form C{# ... (to end of line)}"

+

+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +

+                                  Optional( Word(" \t") +

+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")

+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")

+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.

+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""

+

+# some other useful expressions - using lower-case class name since we are really using this as a namespace

+class pyparsing_common:

+    """

+    Here are some common low-level expressions that may be useful in jump-starting parser development:

+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})

+     - common L{programming identifiers<identifier>}

+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})

+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}

+     - L{UUID<uuid>}

+     - L{comma-separated list<comma_separated_list>}

+    Parse actions:

+     - C{L{convertToInteger}}

+     - C{L{convertToFloat}}

+     - C{L{convertToDate}}

+     - C{L{convertToDatetime}}

+     - C{L{stripHTMLTags}}

+     - C{L{upcaseTokens}}

+     - C{L{downcaseTokens}}

+

+    Example::

+        pyparsing_common.number.runTests('''

+            # any int or real number, returned as the appropriate type

+            100

+            -100

+            +100

+            3.14159

+            6.02e23

+            1e-12

+            ''')

+

+        pyparsing_common.fnumber.runTests('''

+            # any int or real number, returned as float

+            100

+            -100

+            +100

+            3.14159

+            6.02e23

+            1e-12

+            ''')

+

+        pyparsing_common.hex_integer.runTests('''

+            # hex numbers

+            100

+            FF

+            ''')

+

+        pyparsing_common.fraction.runTests('''

+            # fractions

+            1/2

+            -3/4

+            ''')

+

+        pyparsing_common.mixed_integer.runTests('''

+            # mixed fractions

+            1

+            1/2

+            -3/4

+            1-3/4

+            ''')

+

+        import uuid

+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))

+        pyparsing_common.uuid.runTests('''

+            # uuid

+            12345678-1234-5678-1234-567812345678

+            ''')

+    prints::

+        # any int or real number, returned as the appropriate type

+        100

+        [100]

+

+        -100

+        [-100]

+

+        +100

+        [100]

+

+        3.14159

+        [3.14159]

+

+        6.02e23

+        [6.02e+23]

+

+        1e-12

+        [1e-12]

+

+        # any int or real number, returned as float

+        100

+        [100.0]

+

+        -100

+        [-100.0]

+

+        +100

+        [100.0]

+

+        3.14159

+        [3.14159]

+

+        6.02e23

+        [6.02e+23]

+

+        1e-12

+        [1e-12]

+

+        # hex numbers

+        100

+        [256]

+

+        FF

+        [255]

+

+        # fractions

+        1/2

+        [0.5]

+

+        -3/4

+        [-0.75]

+

+        # mixed fractions

+        1

+        [1]

+

+        1/2

+        [0.5]

+

+        -3/4

+        [-0.75]

+

+        1-3/4

+        [1.75]

+

+        # uuid

+        12345678-1234-5678-1234-567812345678

+        [UUID('12345678-1234-5678-1234-567812345678')]

+    """

+

+    convertToInteger = tokenMap(int)

+    """

+    Parse action for converting parsed integers to Python int

+    """

+

+    convertToFloat = tokenMap(float)

+    """

+    Parse action for converting parsed numbers to Python float

+    """

+

+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)

+    """expression that parses an unsigned integer, returns an int"""

+

+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))

+    """expression that parses a hexadecimal integer, returns an int"""

+

+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)

+    """expression that parses an integer with optional leading sign, returns an int"""

+

+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")

+    """fractional expression of an integer divided by an integer, returns a float"""

+    fraction.addParseAction(lambda t: t[0]/t[-1])

+

+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")

+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""

+    mixed_integer.addParseAction(sum)

+

+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)

+    """expression that parses a floating point number and returns a float"""

+

+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)

+    """expression that parses a floating point number with optional scientific notation and returns a float"""

+

+    # streamlining this expression makes the docs nicer-looking

+    number = (sci_real | real | signed_integer).streamline()

+    """any numeric expression, returns the corresponding Python type"""

+

+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)

+    """any int or real number, returned as float"""

+    

+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")

+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""

+    

+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")

+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"

+

+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")

+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")

+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")

+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)

+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")

+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")

+    "IPv6 address (long, short, or mixed form)"

+    

+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")

+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"

+

+    @staticmethod

+    def convertToDate(fmt="%Y-%m-%d"):

+        """

+        Helper to create a parse action for converting parsed date string to Python datetime.date

+

+        Params -

+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})

+

+        Example::

+            date_expr = pyparsing_common.iso8601_date.copy()

+            date_expr.setParseAction(pyparsing_common.convertToDate())

+            print(date_expr.parseString("1999-12-31"))

+        prints::

+            [datetime.date(1999, 12, 31)]

+        """

+        def cvt_fn(s,l,t):

+            try:

+                return datetime.strptime(t[0], fmt).date()

+            except ValueError as ve:

+                raise ParseException(s, l, str(ve))

+        return cvt_fn

+

+    @staticmethod

+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):

+        """

+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime

+

+        Params -

+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})

+

+        Example::

+            dt_expr = pyparsing_common.iso8601_datetime.copy()

+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())

+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))

+        prints::

+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]

+        """

+        def cvt_fn(s,l,t):

+            try:

+                return datetime.strptime(t[0], fmt)

+            except ValueError as ve:

+                raise ParseException(s, l, str(ve))

+        return cvt_fn

+

+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")

+    "ISO8601 date (C{yyyy-mm-dd})"

+

+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")

+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"

+

+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")

+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"

+

+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()

+    @staticmethod

+    def stripHTMLTags(s, l, tokens):

+        """

+        Parse action to remove HTML tags from web page HTML source

+

+        Example::

+            # strip HTML links from normal text 

+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'

+            td,td_end = makeHTMLTags("TD")

+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end

+            

+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'

+        """

+        return pyparsing_common._html_stripper.transformString(tokens[0])

+

+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 

+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")

+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")

+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""

+

+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))

+    """Parse action to convert tokens to upper case."""

+

+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))

+    """Parse action to convert tokens to lower case."""

+

+

+if __name__ == "__main__":

+

+    selectToken    = CaselessLiteral("select")

+    fromToken      = CaselessLiteral("from")

+

+    ident          = Word(alphas, alphanums + "_$")

+

+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)

+    columnNameList = Group(delimitedList(columnName)).setName("columns")

+    columnSpec     = ('*' | columnNameList)

+

+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)

+    tableNameList  = Group(delimitedList(tableName)).setName("tables")

+    

+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")

+

+    # demo runTests method, including embedded comments in test string

+    simpleSQL.runTests("""

+        # '*' as column list and dotted table name

+        select * from SYS.XYZZY

+

+        # caseless match on "SELECT", and casts back to "select"

+        SELECT * from XYZZY, ABC

+

+        # list of column names, and mixed case SELECT keyword

+        Select AA,BB,CC from Sys.dual

+

+        # multiple tables

+        Select A, B, C from Sys.dual, Table2

+

+        # invalid SELECT keyword - should fail

+        Xelect A, B, C from Sys.dual

+

+        # incomplete command - should fail

+        Select

+

+        # invalid column name - should fail

+        Select ^^^ frox Sys.dual

+

+        """)

+

+    pyparsing_common.number.runTests("""

+        100

+        -100

+        +100

+        3.14159

+        6.02e23

+        1e-12

+        """)

+

+    # any int or real number, returned as float

+    pyparsing_common.fnumber.runTests("""

+        100

+        -100

+        +100

+        3.14159

+        6.02e23

+        1e-12

+        """)

+

+    pyparsing_common.hex_integer.runTests("""

+        100

+        FF

+        """)

+

+    import uuid

+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))

+    pyparsing_common.uuid.runTests("""

+        12345678-1234-5678-1234-567812345678

+        """)

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/six.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/six.py
new file mode 100644
index 00000000..190c0239
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__init__.py
new file mode 100644
index 00000000..c1eb9e99
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if prefix and sys.version_info > (3, 3):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'packaging', 'pyparsing', 'six', 'appdirs'
+VendorImporter(__name__, names).install()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..e3349d80
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/py31compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/py31compat.py
new file mode 100644
index 00000000..a381c424
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from .extern import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/LICENSE b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/LICENSE
new file mode 100644
index 00000000..6e0693b4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/LICENSE
@@ -0,0 +1,19 @@
+Copyright (C) 2016 Jason R Coombs <jaraco@jaraco.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/METADATA
new file mode 100644
index 00000000..571a5cb2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/METADATA
@@ -0,0 +1,77 @@
+Metadata-Version: 2.1
+Name: setuptools
+Version: 41.0.1
+Summary: Easily download, build, install, upgrade, and uninstall Python packages
+Home-page: https://github.com/pypa/setuptools
+Author: Python Packaging Authority
+Author-email: distutils-sig@python.org
+License: UNKNOWN
+Project-URL: Documentation, https://setuptools.readthedocs.io/
+Keywords: CPAN PyPI distutils eggs package management
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: System :: Archiving :: Packaging
+Classifier: Topic :: System :: Systems Administration
+Classifier: Topic :: Utilities
+Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
+Description-Content-Type: text/x-rst; charset=UTF-8
+Provides-Extra: certs
+Requires-Dist: certifi (==2016.9.26) ; extra == 'certs'
+Provides-Extra: ssl
+Requires-Dist: wincertstore (==0.2) ; (sys_platform=='win32') and extra == 'ssl'
+
+.. image:: https://img.shields.io/pypi/v/setuptools.svg
+   :target: https://pypi.org/project/setuptools
+
+.. image:: https://img.shields.io/readthedocs/setuptools/latest.svg
+    :target: https://setuptools.readthedocs.io
+
+.. image:: https://img.shields.io/travis/pypa/setuptools/master.svg?label=Linux%20CI&logo=travis&logoColor=white
+   :target: https://travis-ci.org/pypa/setuptools
+
+.. image:: https://img.shields.io/appveyor/ci/pypa/setuptools/master.svg?label=Windows%20CI&logo=appveyor&logoColor=white
+   :target: https://ci.appveyor.com/project/pypa/setuptools/branch/master
+
+.. image:: https://img.shields.io/codecov/c/github/pypa/setuptools/master.svg?logo=codecov&logoColor=white
+   :target: https://codecov.io/gh/pypa/setuptools
+
+.. image:: https://tidelift.com/badges/github/pypa/setuptools?style=flat
+   :target: https://tidelift.com/subscription/pkg/pypi-setuptools?utm_source=pypi-setuptools&utm_medium=readme
+
+.. image:: https://img.shields.io/pypi/pyversions/setuptools.svg
+
+See the `Installation Instructions
+<https://packaging.python.org/installing/>`_ in the Python Packaging
+User's Guide for instructions on installing, upgrading, and uninstalling
+Setuptools.
+
+Questions and comments should be directed to the `distutils-sig
+mailing list <http://mail.python.org/pipermail/distutils-sig/>`_.
+Bug reports and especially tested patches may be
+submitted directly to the `bug tracker
+<https://github.com/pypa/setuptools/issues>`_.
+
+To report a security vulnerability, please use the
+`Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+Code of Conduct
+---------------
+
+Everyone interacting in the setuptools project's codebases, issue trackers,
+chat rooms, and mailing lists is expected to follow the
+`PyPA Code of Conduct <https://www.pypa.io/en/latest/code-of-conduct/>`_.
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/RECORD
new file mode 100644
index 00000000..be0cb901
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/RECORD
@@ -0,0 +1,186 @@
+../../../bin/easy_install,sha256=B6cUEpyg_hzdVeR-d-Ll5xSaZt6UOMwjmlwF-tpAfdw,278

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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/WHEEL
new file mode 100644
index 00000000..c8240f03
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.1)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/dependency_links.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/dependency_links.txt
new file mode 100644
index 00000000..e87d0210
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/dependency_links.txt
@@ -0,0 +1,2 @@
+https://files.pythonhosted.org/packages/source/c/certifi/certifi-2016.9.26.tar.gz#md5=baa81e951a29958563689d868ef1064d
+https://files.pythonhosted.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/entry_points.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/entry_points.txt
new file mode 100644
index 00000000..4159fd0a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/entry_points.txt
@@ -0,0 +1,65 @@
+[console_scripts]
+easy_install = setuptools.command.easy_install:main
+easy_install-3.6 = setuptools.command.easy_install:main
+
+[distutils.commands]
+alias = setuptools.command.alias:alias
+bdist_egg = setuptools.command.bdist_egg:bdist_egg
+bdist_rpm = setuptools.command.bdist_rpm:bdist_rpm
+bdist_wininst = setuptools.command.bdist_wininst:bdist_wininst
+build_clib = setuptools.command.build_clib:build_clib
+build_ext = setuptools.command.build_ext:build_ext
+build_py = setuptools.command.build_py:build_py
+develop = setuptools.command.develop:develop
+dist_info = setuptools.command.dist_info:dist_info
+easy_install = setuptools.command.easy_install:easy_install
+egg_info = setuptools.command.egg_info:egg_info
+install = setuptools.command.install:install
+install_egg_info = setuptools.command.install_egg_info:install_egg_info
+install_lib = setuptools.command.install_lib:install_lib
+install_scripts = setuptools.command.install_scripts:install_scripts
+register = setuptools.command.register:register
+rotate = setuptools.command.rotate:rotate
+saveopts = setuptools.command.saveopts:saveopts
+sdist = setuptools.command.sdist:sdist
+setopt = setuptools.command.setopt:setopt
+test = setuptools.command.test:test
+upload = setuptools.command.upload:upload
+upload_docs = setuptools.command.upload_docs:upload_docs
+
+[distutils.setup_keywords]
+convert_2to3_doctests = setuptools.dist:assert_string_list
+dependency_links = setuptools.dist:assert_string_list
+eager_resources = setuptools.dist:assert_string_list
+entry_points = setuptools.dist:check_entry_points
+exclude_package_data = setuptools.dist:check_package_data
+extras_require = setuptools.dist:check_extras
+include_package_data = setuptools.dist:assert_bool
+install_requires = setuptools.dist:check_requirements
+namespace_packages = setuptools.dist:check_nsp
+package_data = setuptools.dist:check_package_data
+packages = setuptools.dist:check_packages
+python_requires = setuptools.dist:check_specifier
+setup_requires = setuptools.dist:check_requirements
+test_loader = setuptools.dist:check_importable
+test_runner = setuptools.dist:check_importable
+test_suite = setuptools.dist:check_test_suite
+tests_require = setuptools.dist:check_requirements
+use_2to3 = setuptools.dist:assert_bool
+use_2to3_exclude_fixers = setuptools.dist:assert_string_list
+use_2to3_fixers = setuptools.dist:assert_string_list
+zip_safe = setuptools.dist:assert_bool
+
+[egg_info.writers]
+PKG-INFO = setuptools.command.egg_info:write_pkg_info
+dependency_links.txt = setuptools.command.egg_info:overwrite_arg
+depends.txt = setuptools.command.egg_info:warn_depends_obsolete
+eager_resources.txt = setuptools.command.egg_info:overwrite_arg
+entry_points.txt = setuptools.command.egg_info:write_entries
+namespace_packages.txt = setuptools.command.egg_info:overwrite_arg
+requires.txt = setuptools.command.egg_info:write_requirements
+top_level.txt = setuptools.command.egg_info:write_toplevel_names
+
+[setuptools.installation]
+eggsecutable = setuptools.command.easy_install:bootstrap
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/top_level.txt
new file mode 100644
index 00000000..4577c6a7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/top_level.txt
@@ -0,0 +1,3 @@
+easy_install
+pkg_resources
+setuptools
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/zip-safe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/zip-safe
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools-41.0.1.dist-info/zip-safe
@@ -0,0 +1 @@
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__init__.py
new file mode 100644
index 00000000..a71b2bbd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__init__.py
@@ -0,0 +1,228 @@
+"""Extensions to the 'distutils' for large or complex distributions"""
+
+import os
+import sys
+import functools
+import distutils.core
+import distutils.filelist
+import re
+from distutils.errors import DistutilsOptionError
+from distutils.util import convert_path
+from fnmatch import fnmatchcase
+
+from ._deprecation_warning import SetuptoolsDeprecationWarning
+
+from setuptools.extern.six import PY3, string_types
+from setuptools.extern.six.moves import filter, map
+
+import setuptools.version
+from setuptools.extension import Extension
+from setuptools.dist import Distribution, Feature
+from setuptools.depends import Require
+from . import monkey
+
+__metaclass__ = type
+
+
+__all__ = [
+    'setup', 'Distribution', 'Feature', 'Command', 'Extension', 'Require',
+    'SetuptoolsDeprecationWarning',
+    'find_packages'
+]
+
+if PY3:
+  __all__.append('find_namespace_packages')
+
+__version__ = setuptools.version.__version__
+
+bootstrap_install_from = None
+
+# If we run 2to3 on .py files, should we also convert docstrings?
+# Default: yes; assume that we can detect doctests reliably
+run_2to3_on_doctests = True
+# Standard package names for fixer packages
+lib2to3_fixer_packages = ['lib2to3.fixes']
+
+
+class PackageFinder:
+    """
+    Generate a list of all Python packages found within a directory
+    """
+
+    @classmethod
+    def find(cls, where='.', exclude=(), include=('*',)):
+        """Return a list all Python packages found within directory 'where'
+
+        'where' is the root directory which will be searched for packages.  It
+        should be supplied as a "cross-platform" (i.e. URL-style) path; it will
+        be converted to the appropriate local path syntax.
+
+        'exclude' is a sequence of package names to exclude; '*' can be used
+        as a wildcard in the names, such that 'foo.*' will exclude all
+        subpackages of 'foo' (but not 'foo' itself).
+
+        'include' is a sequence of package names to include.  If it's
+        specified, only the named packages will be included.  If it's not
+        specified, all found packages will be included.  'include' can contain
+        shell style wildcard patterns just like 'exclude'.
+        """
+
+        return list(cls._find_packages_iter(
+            convert_path(where),
+            cls._build_filter('ez_setup', '*__pycache__', *exclude),
+            cls._build_filter(*include)))
+
+    @classmethod
+    def _find_packages_iter(cls, where, exclude, include):
+        """
+        All the packages found in 'where' that pass the 'include' filter, but
+        not the 'exclude' filter.
+        """
+        for root, dirs, files in os.walk(where, followlinks=True):
+            # Copy dirs to iterate over it, then empty dirs.
+            all_dirs = dirs[:]
+            dirs[:] = []
+
+            for dir in all_dirs:
+                full_path = os.path.join(root, dir)
+                rel_path = os.path.relpath(full_path, where)
+                package = rel_path.replace(os.path.sep, '.')
+
+                # Skip directory trees that are not valid packages
+                if ('.' in dir or not cls._looks_like_package(full_path)):
+                    continue
+
+                # Should this package be included?
+                if include(package) and not exclude(package):
+                    yield package
+
+                # Keep searching subdirectories, as there may be more packages
+                # down there, even if the parent was excluded.
+                dirs.append(dir)
+
+    @staticmethod
+    def _looks_like_package(path):
+        """Does a directory look like a package?"""
+        return os.path.isfile(os.path.join(path, '__init__.py'))
+
+    @staticmethod
+    def _build_filter(*patterns):
+        """
+        Given a list of patterns, return a callable that will be true only if
+        the input matches at least one of the patterns.
+        """
+        return lambda name: any(fnmatchcase(name, pat=pat) for pat in patterns)
+
+
+class PEP420PackageFinder(PackageFinder):
+    @staticmethod
+    def _looks_like_package(path):
+        return True
+
+
+find_packages = PackageFinder.find
+
+if PY3:
+  find_namespace_packages = PEP420PackageFinder.find
+
+
+def _install_setup_requires(attrs):
+    # Note: do not use `setuptools.Distribution` directly, as
+    # our PEP 517 backend patch `distutils.core.Distribution`.
+    dist = distutils.core.Distribution(dict(
+        (k, v) for k, v in attrs.items()
+        if k in ('dependency_links', 'setup_requires')
+    ))
+    # Honor setup.cfg's options.
+    dist.parse_config_files(ignore_option_errors=True)
+    if dist.setup_requires:
+        dist.fetch_build_eggs(dist.setup_requires)
+
+
+def setup(**attrs):
+    # Make sure we have any requirements needed to interpret 'attrs'.
+    _install_setup_requires(attrs)
+    return distutils.core.setup(**attrs)
+
+setup.__doc__ = distutils.core.setup.__doc__
+
+
+_Command = monkey.get_unpatched(distutils.core.Command)
+
+
+class Command(_Command):
+    __doc__ = _Command.__doc__
+
+    command_consumes_arguments = False
+
+    def __init__(self, dist, **kw):
+        """
+        Construct the command for dist, updating
+        vars(self) with any keyword parameters.
+        """
+        _Command.__init__(self, dist)
+        vars(self).update(kw)
+
+    def _ensure_stringlike(self, option, what, default=None):
+        val = getattr(self, option)
+        if val is None:
+            setattr(self, option, default)
+            return default
+        elif not isinstance(val, string_types):
+            raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
+                                       % (option, what, val))
+        return val
+
+    def ensure_string_list(self, option):
+        r"""Ensure that 'option' is a list of strings.  If 'option' is
+        currently a string, we split it either on /,\s*/ or /\s+/, so
+        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
+        ["foo", "bar", "baz"].
+        """
+        val = getattr(self, option)
+        if val is None:
+            return
+        elif isinstance(val, string_types):
+            setattr(self, option, re.split(r',\s*|\s+', val))
+        else:
+            if isinstance(val, list):
+                ok = all(isinstance(v, string_types) for v in val)
+            else:
+                ok = False
+            if not ok:
+                raise DistutilsOptionError(
+                      "'%s' must be a list of strings (got %r)"
+                      % (option, val))
+
+    def reinitialize_command(self, command, reinit_subcommands=0, **kw):
+        cmd = _Command.reinitialize_command(self, command, reinit_subcommands)
+        vars(cmd).update(kw)
+        return cmd
+
+
+def _find_all_simple(path):
+    """
+    Find all files under 'path'
+    """
+    results = (
+        os.path.join(base, file)
+        for base, dirs, files in os.walk(path, followlinks=True)
+        for file in files
+    )
+    return filter(os.path.isfile, results)
+
+
+def findall(dir=os.curdir):
+    """
+    Find all files under 'dir' and return the list of full filenames.
+    Unless dir is '.', return full filenames with dir prepended.
+    """
+    files = _find_all_simple(dir)
+    if dir == os.curdir:
+        make_rel = functools.partial(os.path.relpath, start=dir)
+        files = map(make_rel, files)
+    return list(files)
+
+
+# Apply monkey patches
+monkey.patch_all()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/__init__.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/wheel.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/windows_support.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/windows_support.cpython-37.pyc
new file mode 100644
index 00000000..7daf5d94
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/__pycache__/windows_support.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_deprecation_warning.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_deprecation_warning.py
new file mode 100644
index 00000000..086b64dd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_deprecation_warning.py
@@ -0,0 +1,7 @@
+class SetuptoolsDeprecationWarning(Warning):
+    """
+    Base class for warning deprecations in ``setuptools``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__init__.py
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/__init__.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/pyparsing.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/pyparsing.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/pyparsing.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/six.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/six.cpython-37.pyc
new file mode 100644
index 00000000..97652377
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/__pycache__/six.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__about__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__about__.py
new file mode 100644
index 00000000..95d330ef
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__about__.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "16.8"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2016 %s" % __author__
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__init__.py
new file mode 100644
index 00000000..5ee62202
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__init__.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__, __copyright__, __email__, __license__, __summary__, __title__,
+    __uri__, __version__
+)
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__about__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
new file mode 100644
index 00000000..ae980b07
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__about__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..5a4980dc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
new file mode 100644
index 00000000..7f5346f9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
new file mode 100644
index 00000000..88caf3c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-37.pyc
new file mode 100644
index 00000000..f7950c1b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
new file mode 100644
index 00000000..07656b27
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
new file mode 100644
index 00000000..aa976eb0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-37.pyc
new file mode 100644
index 00000000..c1daa272
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-37.pyc
new file mode 100644
index 00000000..61f8f612
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_compat.py
new file mode 100644
index 00000000..210bb80b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_compat.py
@@ -0,0 +1,30 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = str,
+else:
+    string_types = basestring,
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_structures.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_structures.py
new file mode 100644
index 00000000..ccc27861
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+NegativeInfinity = NegativeInfinity()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/markers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/markers.py
new file mode 100644
index 00000000..031332a3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/markers.py
@@ -0,0 +1,301 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from setuptools.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from setuptools.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from setuptools.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker", "UndefinedComparison", "UndefinedEnvironmentName",
+    "Marker", "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version") |
+    L("platform_python_implementation") |
+    L("implementation_name") |
+    L("python_full_version") |
+    L("platform_release") |
+    L("platform_version") |
+    L("platform_machine") |
+    L("platform_system") |
+    L("python_version") |
+    L("sys_platform") |
+    L("os_name") |
+    L("os.name") |  # PEP-345
+    L("sys.platform") |  # PEP-345
+    L("platform.version") |  # PEP-345
+    L("platform.machine") |  # PEP-345
+    L("platform.python_implementation") |  # PEP-345
+    L("python_implementation") |  # undocumented setuptools legacy
+    L("extra")
+)
+ALIASES = {
+    'os.name': 'os_name',
+    'sys.platform': 'sys_platform',
+    'platform.version': 'platform_version',
+    'platform.machine': 'platform_machine',
+    'platform.python_implementation': 'platform_python_implementation',
+    'python_implementation': 'platform_python_implementation'
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") |
+    L("==") |
+    L(">=") |
+    L("<=") |
+    L("!=") |
+    L("~=") |
+    L(">") |
+    L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (isinstance(marker, list) and len(marker) == 1 and
+            isinstance(marker[0], (list, tuple))):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = '{0.major}.{0.minor}.{0.micro}'.format(info)
+    kind = info.releaselevel
+    if kind != 'final':
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, 'implementation'):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = '0'
+        implementation_name = ''
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc:e.loc + 8])
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/requirements.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/requirements.py
new file mode 100644
index 00000000..5b493416
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/requirements.py
@@ -0,0 +1,127 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from setuptools.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from setuptools.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from setuptools.extern.pyparsing import Literal as L  # noqa
+from setuptools.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r'[^ ]+')("url")
+URL = (AT + URI)
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE),
+                       joinString=",", adjacent=False)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or '')
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start:t._original_end])
+)
+MARKER_SEPERATOR = SEMICOLON
+MARKER = MARKER_SEPERATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = \
+    NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                "Invalid requirement, parse error at \"{0!r}\"".format(
+                    requirement_string[e.loc:e.loc + 8]))
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if not (parsed_url.scheme and parsed_url.netloc) or (
+                    not parsed_url.scheme and not parsed_url.netloc):
+                raise InvalidRequirement("Invalid URL given")
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/specifiers.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/specifiers.py
new file mode 100644
index 00000000..7f5a76cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/specifiers.py
@@ -0,0 +1,774 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(
+            self.__class__.__name__,
+            str(self),
+            pre,
+        )
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if (parsed_version.is_prerelease and not
+                        (prereleases or self.prereleases)):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the begining.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not
+                               x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return (self._get_operator(">=")(prospective, spec) and
+                self._get_operator("==")(prospective, prefix))
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[:len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is techincally greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]):])
+    right_split.append(right[len(right_split[0]):])
+
+    # Insert our padding
+    left_split.insert(
+        1,
+        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
+    )
+    right_split.insert(
+        1,
+        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
+    )
+
+    return (
+        list(itertools.chain(*left_split)),
+        list(itertools.chain(*right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(
+            s.contains(item, prereleases=prereleases)
+            for s in self._specs
+        )
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/utils.py
new file mode 100644
index 00000000..942387ce
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/utils.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/version.py
new file mode 100644
index 00000000..83b5ee8c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/packaging/version.py
@@ -0,0 +1,393 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = [
+    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
+]
+
+
+_Version = collections.namedtuple(
+    "_Version",
+    ["epoch", "release", "dev", "pre", "post", "local"],
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(
+    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
+)
+
+_legacy_version_replacement_map = {
+    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(
+        r"^\s*" + VERSION_PATTERN + r"\s*$",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(
+                match.group("pre_l"),
+                match.group("pre_n"),
+            ),
+            post=_parse_letter_version(
+                match.group("post_l"),
+                match.group("post_n1") or match.group("post_n2"),
+            ),
+            dev=_parse_letter_version(
+                match.group("dev_l"),
+                match.group("dev_n"),
+            ),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        # Pre-release
+        if self._version.pre is not None:
+            parts.append("".join(str(x) for x in self._version.pre))
+
+        # Post-release
+        if self._version.post is not None:
+            parts.append(".post{0}".format(self._version.post[1]))
+
+        # Development release
+        if self._version.dev is not None:
+            parts.append(".dev{0}".format(self._version.dev[1]))
+
+        # Local version segment
+        if self._version.local is not None:
+            parts.append(
+                "+{0}".format(".".join(str(x) for x in self._version.local))
+            )
+
+        return "".join(parts)
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        return "".join(parts)
+
+    @property
+    def local(self):
+        version_string = str(self)
+        if "+" in version_string:
+            return version_string.split("+", 1)[1]
+
+    @property
+    def is_prerelease(self):
+        return bool(self._version.dev or self._version.pre)
+
+    @property
+    def is_postrelease(self):
+        return bool(self._version.post)
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_seperators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_seperators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(
+            itertools.dropwhile(
+                lambda x: x == 0,
+                reversed(release),
+            )
+        ))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple(
+            (i, "") if isinstance(i, int) else (-Infinity, i)
+            for i in local
+        )
+
+    return epoch, release, pre, post, dev, local
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/pyparsing.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/pyparsing.py
new file mode 100644
index 00000000..cf75e1e5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py

+#

+# Copyright (c) 2003-2018  Paul T. McGuire

+#

+# Permission is hereby granted, free of charge, to any person obtaining

+# a copy of this software and associated documentation files (the

+# "Software"), to deal in the Software without restriction, including

+# without limitation the rights to use, copy, modify, merge, publish,

+# distribute, sublicense, and/or sell copies of the Software, and to

+# permit persons to whom the Software is furnished to do so, subject to

+# the following conditions:

+#

+# The above copyright notice and this permission notice shall be

+# included in all copies or substantial portions of the Software.

+#

+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+#

+

+__doc__ = \

+"""

+pyparsing module - Classes and methods to define and execute parsing grammars

+=============================================================================

+

+The pyparsing module is an alternative approach to creating and executing simple grammars,

+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you

+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module

+provides a library of classes that you use to construct the grammar directly in Python.

+

+Here is a program to parse "Hello, World!" (or any greeting of the form 

+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 

+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to

+L{Literal} expressions)::

+

+    from pyparsing import Word, alphas

+

+    # define grammar of a greeting

+    greet = Word(alphas) + "," + Word(alphas) + "!"

+

+    hello = "Hello, World!"

+    print (hello, "->", greet.parseString(hello))

+

+The program outputs the following::

+

+    Hello, World! -> ['Hello', ',', 'World', '!']

+

+The Python representation of the grammar is quite readable, owing to the self-explanatory

+class names, and the use of '+', '|' and '^' operators.

+

+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an

+object with named attributes.

+

+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:

+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)

+ - quoted strings

+ - embedded comments

+

+

+Getting Started -

+-----------------

+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing

+classes inherit from. Use the docstrings for examples of how to:

+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes

+ - construct character word-group expressions using the L{Word} class

+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes

+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones

+ - associate names with your parsed results using L{ParserElement.setResultsName}

+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}

+ - find more useful common expressions in the L{pyparsing_common} namespace class

+"""

+

+__version__ = "2.2.1"

+__versionTime__ = "18 Sep 2018 00:49 UTC"

+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"

+

+import string

+from weakref import ref as wkref

+import copy

+import sys

+import warnings

+import re

+import sre_constants

+import collections

+import pprint

+import traceback

+import types

+from datetime import datetime

+

+try:

+    from _thread import RLock

+except ImportError:

+    from threading import RLock

+

+try:

+    # Python 3

+    from collections.abc import Iterable

+    from collections.abc import MutableMapping

+except ImportError:

+    # Python 2.7

+    from collections import Iterable

+    from collections import MutableMapping

+

+try:

+    from collections import OrderedDict as _OrderedDict

+except ImportError:

+    try:

+        from ordereddict import OrderedDict as _OrderedDict

+    except ImportError:

+        _OrderedDict = None

+

+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )

+

+__all__ = [

+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',

+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',

+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',

+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',

+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',

+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 

+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',

+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',

+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',

+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',

+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',

+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',

+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',

+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 

+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',

+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',

+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',

+'CloseMatch', 'tokenMap', 'pyparsing_common',

+]

+

+system_version = tuple(sys.version_info)[:3]

+PY_3 = system_version[0] == 3

+if PY_3:

+    _MAX_INT = sys.maxsize

+    basestring = str

+    unichr = chr

+    _ustr = str

+

+    # build list of single arg builtins, that can be used as parse actions

+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]

+

+else:

+    _MAX_INT = sys.maxint

+    range = xrange

+

+    def _ustr(obj):

+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries

+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It

+           then < returns the unicode object | encodes it with the default encoding | ... >.

+        """

+        if isinstance(obj,unicode):

+            return obj

+

+        try:

+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so

+            # it won't break any existing code.

+            return str(obj)

+

+        except UnicodeEncodeError:

+            # Else encode it

+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')

+            xmlcharref = Regex(r'&#\d+;')

+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])

+            return xmlcharref.transformString(ret)

+

+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions

+    singleArgBuiltins = []

+    import __builtin__

+    for fname in "sum len sorted reversed list tuple set any all min max".split():

+        try:

+            singleArgBuiltins.append(getattr(__builtin__,fname))

+        except AttributeError:

+            continue

+            

+_generatorType = type((y for y in range(1)))

+ 

+def _xml_escape(data):

+    """Escape &, <, >, ", ', etc. in a string of data."""

+

+    # ampersand must be replaced first

+    from_symbols = '&><"\''

+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())

+    for from_,to_ in zip(from_symbols, to_symbols):

+        data = data.replace(from_, to_)

+    return data

+

+class _Constants(object):

+    pass

+

+alphas     = string.ascii_uppercase + string.ascii_lowercase

+nums       = "0123456789"

+hexnums    = nums + "ABCDEFabcdef"

+alphanums  = alphas + nums

+_bslash    = chr(92)

+printables = "".join(c for c in string.printable if c not in string.whitespace)

+

+class ParseBaseException(Exception):

+    """base exception class for all parsing runtime exceptions"""

+    # Performance tuning: we construct a *lot* of these, so keep this

+    # constructor as small and fast as possible

+    def __init__( self, pstr, loc=0, msg=None, elem=None ):

+        self.loc = loc

+        if msg is None:

+            self.msg = pstr

+            self.pstr = ""

+        else:

+            self.msg = msg

+            self.pstr = pstr

+        self.parserElement = elem

+        self.args = (pstr, loc, msg)

+

+    @classmethod

+    def _from_exception(cls, pe):

+        """

+        internal factory method to simplify creating one type of ParseException 

+        from another - avoids having __init__ signature conflicts among subclasses

+        """

+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)

+

+    def __getattr__( self, aname ):

+        """supported attributes by name are:

+            - lineno - returns the line number of the exception text

+            - col - returns the column number of the exception text

+            - line - returns the line containing the exception text

+        """

+        if( aname == "lineno" ):

+            return lineno( self.loc, self.pstr )

+        elif( aname in ("col", "column") ):

+            return col( self.loc, self.pstr )

+        elif( aname == "line" ):

+            return line( self.loc, self.pstr )

+        else:

+            raise AttributeError(aname)

+

+    def __str__( self ):

+        return "%s (at char %d), (line:%d, col:%d)" % \

+                ( self.msg, self.loc, self.lineno, self.column )

+    def __repr__( self ):

+        return _ustr(self)

+    def markInputline( self, markerString = ">!<" ):

+        """Extracts the exception line from the input string, and marks

+           the location of the exception with a special symbol.

+        """

+        line_str = self.line

+        line_column = self.column - 1

+        if markerString:

+            line_str = "".join((line_str[:line_column],

+                                markerString, line_str[line_column:]))

+        return line_str.strip()

+    def __dir__(self):

+        return "lineno col line".split() + dir(type(self))

+

+class ParseException(ParseBaseException):

+    """

+    Exception thrown when parse expressions don't match class;

+    supported attributes by name are:

+     - lineno - returns the line number of the exception text

+     - col - returns the column number of the exception text

+     - line - returns the line containing the exception text

+        

+    Example::

+        try:

+            Word(nums).setName("integer").parseString("ABC")

+        except ParseException as pe:

+            print(pe)

+            print("column: {}".format(pe.col))

+            

+    prints::

+       Expected integer (at char 0), (line:1, col:1)

+        column: 1

+    """

+    pass

+

+class ParseFatalException(ParseBaseException):

+    """user-throwable exception thrown when inconsistent parse content

+       is found; stops all parsing immediately"""

+    pass

+

+class ParseSyntaxException(ParseFatalException):

+    """just like L{ParseFatalException}, but thrown internally when an

+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 

+       immediately because an unbacktrackable syntax error has been found"""

+    pass

+

+#~ class ReparseException(ParseBaseException):

+    #~ """Experimental class - parse actions can raise this exception to cause

+       #~ pyparsing to reparse the input string:

+        #~ - with a modified input string, and/or

+        #~ - with a modified start location

+       #~ Set the values of the ReparseException in the constructor, and raise the

+       #~ exception in a parse action to cause pyparsing to use the new string/location.

+       #~ Setting the values as None causes no change to be made.

+       #~ """

+    #~ def __init_( self, newstring, restartLoc ):

+        #~ self.newParseText = newstring

+        #~ self.reparseLoc = restartLoc

+

+class RecursiveGrammarException(Exception):

+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""

+    def __init__( self, parseElementList ):

+        self.parseElementTrace = parseElementList

+

+    def __str__( self ):

+        return "RecursiveGrammarException: %s" % self.parseElementTrace

+

+class _ParseResultsWithOffset(object):

+    def __init__(self,p1,p2):

+        self.tup = (p1,p2)

+    def __getitem__(self,i):

+        return self.tup[i]

+    def __repr__(self):

+        return repr(self.tup[0])

+    def setOffset(self,i):

+        self.tup = (self.tup[0],i)

+

+class ParseResults(object):

+    """

+    Structured parse results, to provide multiple means of access to the parsed data:

+       - as a list (C{len(results)})

+       - by list index (C{results[0], results[1]}, etc.)

+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})

+

+    Example::

+        integer = Word(nums)

+        date_str = (integer.setResultsName("year") + '/' 

+                        + integer.setResultsName("month") + '/' 

+                        + integer.setResultsName("day"))

+        # equivalent form:

+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+

+        # parseString returns a ParseResults object

+        result = date_str.parseString("1999/12/31")

+

+        def test(s, fn=repr):

+            print("%s -> %s" % (s, fn(eval(s))))

+        test("list(result)")

+        test("result[0]")

+        test("result['month']")

+        test("result.day")

+        test("'month' in result")

+        test("'minutes' in result")

+        test("result.dump()", str)

+    prints::

+        list(result) -> ['1999', '/', '12', '/', '31']

+        result[0] -> '1999'

+        result['month'] -> '12'

+        result.day -> '31'

+        'month' in result -> True

+        'minutes' in result -> False

+        result.dump() -> ['1999', '/', '12', '/', '31']

+        - day: 31

+        - month: 12

+        - year: 1999

+    """

+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):

+        if isinstance(toklist, cls):

+            return toklist

+        retobj = object.__new__(cls)

+        retobj.__doinit = True

+        return retobj

+

+    # Performance tuning: we construct a *lot* of these, so keep this

+    # constructor as small and fast as possible

+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):

+        if self.__doinit:

+            self.__doinit = False

+            self.__name = None

+            self.__parent = None

+            self.__accumNames = {}

+            self.__asList = asList

+            self.__modal = modal

+            if toklist is None:

+                toklist = []

+            if isinstance(toklist, list):

+                self.__toklist = toklist[:]

+            elif isinstance(toklist, _generatorType):

+                self.__toklist = list(toklist)

+            else:

+                self.__toklist = [toklist]

+            self.__tokdict = dict()

+

+        if name is not None and name:

+            if not modal:

+                self.__accumNames[name] = 0

+            if isinstance(name,int):

+                name = _ustr(name) # will always return a str, but use _ustr for consistency

+            self.__name = name

+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):

+                if isinstance(toklist,basestring):

+                    toklist = [ toklist ]

+                if asList:

+                    if isinstance(toklist,ParseResults):

+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)

+                    else:

+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)

+                    self[name].__name = name

+                else:

+                    try:

+                        self[name] = toklist[0]

+                    except (KeyError,TypeError,IndexError):

+                        self[name] = toklist

+

+    def __getitem__( self, i ):

+        if isinstance( i, (int,slice) ):

+            return self.__toklist[i]

+        else:

+            if i not in self.__accumNames:

+                return self.__tokdict[i][-1][0]

+            else:

+                return ParseResults([ v[0] for v in self.__tokdict[i] ])

+

+    def __setitem__( self, k, v, isinstance=isinstance ):

+        if isinstance(v,_ParseResultsWithOffset):

+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]

+            sub = v[0]

+        elif isinstance(k,(int,slice)):

+            self.__toklist[k] = v

+            sub = v

+        else:

+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]

+            sub = v

+        if isinstance(sub,ParseResults):

+            sub.__parent = wkref(self)

+

+    def __delitem__( self, i ):

+        if isinstance(i,(int,slice)):

+            mylen = len( self.__toklist )

+            del self.__toklist[i]

+

+            # convert int to slice

+            if isinstance(i, int):

+                if i < 0:

+                    i += mylen

+                i = slice(i, i+1)

+            # get removed indices

+            removed = list(range(*i.indices(mylen)))

+            removed.reverse()

+            # fixup indices in token dictionary

+            for name,occurrences in self.__tokdict.items():

+                for j in removed:

+                    for k, (value, position) in enumerate(occurrences):

+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))

+        else:

+            del self.__tokdict[i]

+

+    def __contains__( self, k ):

+        return k in self.__tokdict

+

+    def __len__( self ): return len( self.__toklist )

+    def __bool__(self): return ( not not self.__toklist )

+    __nonzero__ = __bool__

+    def __iter__( self ): return iter( self.__toklist )

+    def __reversed__( self ): return iter( self.__toklist[::-1] )

+    def _iterkeys( self ):

+        if hasattr(self.__tokdict, "iterkeys"):

+            return self.__tokdict.iterkeys()

+        else:

+            return iter(self.__tokdict)

+

+    def _itervalues( self ):

+        return (self[k] for k in self._iterkeys())

+            

+    def _iteritems( self ):

+        return ((k, self[k]) for k in self._iterkeys())

+

+    if PY_3:

+        keys = _iterkeys       

+        """Returns an iterator of all named result keys (Python 3.x only)."""

+

+        values = _itervalues

+        """Returns an iterator of all named result values (Python 3.x only)."""

+

+        items = _iteritems

+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""

+

+    else:

+        iterkeys = _iterkeys

+        """Returns an iterator of all named result keys (Python 2.x only)."""

+

+        itervalues = _itervalues

+        """Returns an iterator of all named result values (Python 2.x only)."""

+

+        iteritems = _iteritems

+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""

+

+        def keys( self ):

+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.iterkeys())

+

+        def values( self ):

+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.itervalues())

+                

+        def items( self ):

+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""

+            return list(self.iteritems())

+

+    def haskeys( self ):

+        """Since keys() returns an iterator, this method is helpful in bypassing

+           code that looks for the existence of any defined results names."""

+        return bool(self.__tokdict)

+        

+    def pop( self, *args, **kwargs):

+        """

+        Removes and returns item at specified index (default=C{last}).

+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no

+        argument or an integer argument, it will use C{list} semantics

+        and pop tokens from the list of parsed tokens. If passed a 

+        non-integer argument (most likely a string), it will use C{dict}

+        semantics and pop the corresponding value from any defined 

+        results names. A second default return value argument is 

+        supported, just as in C{dict.pop()}.

+

+        Example::

+            def remove_first(tokens):

+                tokens.pop(0)

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']

+

+            label = Word(alphas)

+            patt = label("LABEL") + OneOrMore(Word(nums))

+            print(patt.parseString("AAB 123 321").dump())

+

+            # Use pop() in a parse action to remove named result (note that corresponding value is not

+            # removed from list form of results)

+            def remove_LABEL(tokens):

+                tokens.pop("LABEL")

+                return tokens

+            patt.addParseAction(remove_LABEL)

+            print(patt.parseString("AAB 123 321").dump())

+        prints::

+            ['AAB', '123', '321']

+            - LABEL: AAB

+

+            ['AAB', '123', '321']

+        """

+        if not args:

+            args = [-1]

+        for k,v in kwargs.items():

+            if k == 'default':

+                args = (args[0], v)

+            else:

+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)

+        if (isinstance(args[0], int) or 

+                        len(args) == 1 or 

+                        args[0] in self):

+            index = args[0]

+            ret = self[index]

+            del self[index]

+            return ret

+        else:

+            defaultvalue = args[1]

+            return defaultvalue

+

+    def get(self, key, defaultValue=None):

+        """

+        Returns named result matching the given key, or if there is no

+        such name, then returns the given C{defaultValue} or C{None} if no

+        C{defaultValue} is specified.

+

+        Similar to C{dict.get()}.

+        

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            result = date_str.parseString("1999/12/31")

+            print(result.get("year")) # -> '1999'

+            print(result.get("hour", "not specified")) # -> 'not specified'

+            print(result.get("hour")) # -> None

+        """

+        if key in self:

+            return self[key]

+        else:

+            return defaultValue

+

+    def insert( self, index, insStr ):

+        """

+        Inserts new element at location index in the list of parsed tokens.

+        

+        Similar to C{list.insert()}.

+

+        Example::

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+

+            # use a parse action to insert the parse location in the front of the parsed results

+            def insert_locn(locn, tokens):

+                tokens.insert(0, locn)

+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']

+        """

+        self.__toklist.insert(index, insStr)

+        # fixup indices in token dictionary

+        for name,occurrences in self.__tokdict.items():

+            for k, (value, position) in enumerate(occurrences):

+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))

+

+    def append( self, item ):

+        """

+        Add single element to end of ParseResults list of elements.

+

+        Example::

+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']

+            

+            # use a parse action to compute the sum of the parsed integers, and add it to the end

+            def append_sum(tokens):

+                tokens.append(sum(map(int, tokens)))

+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]

+        """

+        self.__toklist.append(item)

+

+    def extend( self, itemseq ):

+        """

+        Add sequence of elements to end of ParseResults list of elements.

+

+        Example::

+            patt = OneOrMore(Word(alphas))

+            

+            # use a parse action to append the reverse of the matched strings, to make a palindrome

+            def make_palindrome(tokens):

+                tokens.extend(reversed([t[::-1] for t in tokens]))

+                return ''.join(tokens)

+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'

+        """

+        if isinstance(itemseq, ParseResults):

+            self += itemseq

+        else:

+            self.__toklist.extend(itemseq)

+

+    def clear( self ):

+        """

+        Clear all elements and results names.

+        """

+        del self.__toklist[:]

+        self.__tokdict.clear()

+

+    def __getattr__( self, name ):

+        try:

+            return self[name]

+        except KeyError:

+            return ""

+            

+        if name in self.__tokdict:

+            if name not in self.__accumNames:

+                return self.__tokdict[name][-1][0]

+            else:

+                return ParseResults([ v[0] for v in self.__tokdict[name] ])

+        else:

+            return ""

+

+    def __add__( self, other ):

+        ret = self.copy()

+        ret += other

+        return ret

+

+    def __iadd__( self, other ):

+        if other.__tokdict:

+            offset = len(self.__toklist)

+            addoffset = lambda a: offset if a<0 else a+offset

+            otheritems = other.__tokdict.items()

+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )

+                                for (k,vlist) in otheritems for v in vlist]

+            for k,v in otherdictitems:

+                self[k] = v

+                if isinstance(v[0],ParseResults):

+                    v[0].__parent = wkref(self)

+            

+        self.__toklist += other.__toklist

+        self.__accumNames.update( other.__accumNames )

+        return self

+

+    def __radd__(self, other):

+        if isinstance(other,int) and other == 0:

+            # useful for merging many ParseResults using sum() builtin

+            return self.copy()

+        else:

+            # this may raise a TypeError - so be it

+            return other + self

+        

+    def __repr__( self ):

+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )

+

+    def __str__( self ):

+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'

+

+    def _asStringList( self, sep='' ):

+        out = []

+        for item in self.__toklist:

+            if out and sep:

+                out.append(sep)

+            if isinstance( item, ParseResults ):

+                out += item._asStringList()

+            else:

+                out.append( _ustr(item) )

+        return out

+

+    def asList( self ):

+        """

+        Returns the parse results as a nested list of matching tokens, all converted to strings.

+

+        Example::

+            patt = OneOrMore(Word(alphas))

+            result = patt.parseString("sldkj lsdkj sldkj")

+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults

+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']

+            

+            # Use asList() to create an actual list

+            result_list = result.asList()

+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']

+        """

+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]

+

+    def asDict( self ):

+        """

+        Returns the named parse results as a nested dictionary.

+

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+            

+            result = date_str.parseString('12/31/1999')

+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})

+            

+            result_dict = result.asDict()

+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}

+

+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict

+            import json

+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable

+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}

+        """

+        if PY_3:

+            item_fn = self.items

+        else:

+            item_fn = self.iteritems

+            

+        def toItem(obj):

+            if isinstance(obj, ParseResults):

+                if obj.haskeys():

+                    return obj.asDict()

+                else:

+                    return [toItem(v) for v in obj]

+            else:

+                return obj

+                

+        return dict((k,toItem(v)) for k,v in item_fn())

+

+    def copy( self ):

+        """

+        Returns a new copy of a C{ParseResults} object.

+        """

+        ret = ParseResults( self.__toklist )

+        ret.__tokdict = self.__tokdict.copy()

+        ret.__parent = self.__parent

+        ret.__accumNames.update( self.__accumNames )

+        ret.__name = self.__name

+        return ret

+

+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):

+        """

+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.

+        """

+        nl = "\n"

+        out = []

+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()

+                                                            for v in vlist)

+        nextLevelIndent = indent + "  "

+

+        # collapse out indents if formatting is not desired

+        if not formatted:

+            indent = ""

+            nextLevelIndent = ""

+            nl = ""

+

+        selfTag = None

+        if doctag is not None:

+            selfTag = doctag

+        else:

+            if self.__name:

+                selfTag = self.__name

+

+        if not selfTag:

+            if namedItemsOnly:

+                return ""

+            else:

+                selfTag = "ITEM"

+

+        out += [ nl, indent, "<", selfTag, ">" ]

+

+        for i,res in enumerate(self.__toklist):

+            if isinstance(res,ParseResults):

+                if i in namedItems:

+                    out += [ res.asXML(namedItems[i],

+                                        namedItemsOnly and doctag is None,

+                                        nextLevelIndent,

+                                        formatted)]

+                else:

+                    out += [ res.asXML(None,

+                                        namedItemsOnly and doctag is None,

+                                        nextLevelIndent,

+                                        formatted)]

+            else:

+                # individual token, see if there is a name for it

+                resTag = None

+                if i in namedItems:

+                    resTag = namedItems[i]

+                if not resTag:

+                    if namedItemsOnly:

+                        continue

+                    else:

+                        resTag = "ITEM"

+                xmlBodyText = _xml_escape(_ustr(res))

+                out += [ nl, nextLevelIndent, "<", resTag, ">",

+                                                xmlBodyText,

+                                                "</", resTag, ">" ]

+

+        out += [ nl, indent, "</", selfTag, ">" ]

+        return "".join(out)

+

+    def __lookup(self,sub):

+        for k,vlist in self.__tokdict.items():

+            for v,loc in vlist:

+                if sub is v:

+                    return k

+        return None

+

+    def getName(self):

+        r"""

+        Returns the results name for this token expression. Useful when several 

+        different expressions might match at a particular location.

+

+        Example::

+            integer = Word(nums)

+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")

+            house_number_expr = Suppress('#') + Word(nums, alphanums)

+            user_data = (Group(house_number_expr)("house_number") 

+                        | Group(ssn_expr)("ssn")

+                        | Group(integer)("age"))

+            user_info = OneOrMore(user_data)

+            

+            result = user_info.parseString("22 111-22-3333 #221B")

+            for item in result:

+                print(item.getName(), ':', item[0])

+        prints::

+            age : 22

+            ssn : 111-22-3333

+            house_number : 221B

+        """

+        if self.__name:

+            return self.__name

+        elif self.__parent:

+            par = self.__parent()

+            if par:

+                return par.__lookup(self)

+            else:

+                return None

+        elif (len(self) == 1 and

+               len(self.__tokdict) == 1 and

+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):

+            return next(iter(self.__tokdict.keys()))

+        else:

+            return None

+

+    def dump(self, indent='', depth=0, full=True):

+        """

+        Diagnostic method for listing out the contents of a C{ParseResults}.

+        Accepts an optional C{indent} argument so that this string can be embedded

+        in a nested display of other data.

+

+        Example::

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+            

+            result = date_str.parseString('12/31/1999')

+            print(result.dump())

+        prints::

+            ['12', '/', '31', '/', '1999']

+            - day: 1999

+            - month: 31

+            - year: 12

+        """

+        out = []

+        NL = '\n'

+        out.append( indent+_ustr(self.asList()) )

+        if full:

+            if self.haskeys():

+                items = sorted((str(k), v) for k,v in self.items())

+                for k,v in items:

+                    if out:

+                        out.append(NL)

+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )

+                    if isinstance(v,ParseResults):

+                        if v:

+                            out.append( v.dump(indent,depth+1) )

+                        else:

+                            out.append(_ustr(v))

+                    else:

+                        out.append(repr(v))

+            elif any(isinstance(vv,ParseResults) for vv in self):

+                v = self

+                for i,vv in enumerate(v):

+                    if isinstance(vv,ParseResults):

+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))

+                    else:

+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))

+            

+        return "".join(out)

+

+    def pprint(self, *args, **kwargs):

+        """

+        Pretty-printer for parsed results as a list, using the C{pprint} module.

+        Accepts additional positional or keyword args as defined for the 

+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})

+

+        Example::

+            ident = Word(alphas, alphanums)

+            num = Word(nums)

+            func = Forward()

+            term = ident | num | Group('(' + func + ')')

+            func <<= ident + Group(Optional(delimitedList(term)))

+            result = func.parseString("fna a,b,(fnb c,d,200),100")

+            result.pprint(width=40)

+        prints::

+            ['fna',

+             ['a',

+              'b',

+              ['(', 'fnb', ['c', 'd', '200'], ')'],

+              '100']]

+        """

+        pprint.pprint(self.asList(), *args, **kwargs)

+

+    # add support for pickle protocol

+    def __getstate__(self):

+        return ( self.__toklist,

+                 ( self.__tokdict.copy(),

+                   self.__parent is not None and self.__parent() or None,

+                   self.__accumNames,

+                   self.__name ) )

+

+    def __setstate__(self,state):

+        self.__toklist = state[0]

+        (self.__tokdict,

+         par,

+         inAccumNames,

+         self.__name) = state[1]

+        self.__accumNames = {}

+        self.__accumNames.update(inAccumNames)

+        if par is not None:

+            self.__parent = wkref(par)

+        else:

+            self.__parent = None

+

+    def __getnewargs__(self):

+        return self.__toklist, self.__name, self.__asList, self.__modal

+

+    def __dir__(self):

+        return (dir(type(self)) + list(self.keys()))

+

+MutableMapping.register(ParseResults)

+

+def col (loc,strg):

+    """Returns current column within a string, counting newlines as line separators.

+   The first column is number 1.

+

+   Note: the default parsing behavior is to expand tabs in the input string

+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information

+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+   consistent view of the parsed string, the parse location, and line and column

+   positions within the parsed string.

+   """

+    s = strg

+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)

+

+def lineno(loc,strg):

+    """Returns current line number within a string, counting newlines as line separators.

+   The first line is number 1.

+

+   Note: the default parsing behavior is to expand tabs in the input string

+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information

+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+   consistent view of the parsed string, the parse location, and line and column

+   positions within the parsed string.

+   """

+    return strg.count("\n",0,loc) + 1

+

+def line( loc, strg ):

+    """Returns the line of text containing loc within a string, counting newlines as line separators.

+       """

+    lastCR = strg.rfind("\n", 0, loc)

+    nextCR = strg.find("\n", loc)

+    if nextCR >= 0:

+        return strg[lastCR+1:nextCR]

+    else:

+        return strg[lastCR+1:]

+

+def _defaultStartDebugAction( instring, loc, expr ):

+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))

+

+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):

+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))

+

+def _defaultExceptionDebugAction( instring, loc, expr, exc ):

+    print ("Exception raised:" + _ustr(exc))

+

+def nullDebugAction(*args):

+    """'Do-nothing' debug action, to suppress debugging output during parsing."""

+    pass

+

+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs

+#~ 'decorator to trim function calls to match the arity of the target'

+#~ def _trim_arity(func, maxargs=3):

+    #~ if func in singleArgBuiltins:

+        #~ return lambda s,l,t: func(t)

+    #~ limit = 0

+    #~ foundArity = False

+    #~ def wrapper(*args):

+        #~ nonlocal limit,foundArity

+        #~ while 1:

+            #~ try:

+                #~ ret = func(*args[limit:])

+                #~ foundArity = True

+                #~ return ret

+            #~ except TypeError:

+                #~ if limit == maxargs or foundArity:

+                    #~ raise

+                #~ limit += 1

+                #~ continue

+    #~ return wrapper

+

+# this version is Python 2.x-3.x cross-compatible

+'decorator to trim function calls to match the arity of the target'

+def _trim_arity(func, maxargs=2):

+    if func in singleArgBuiltins:

+        return lambda s,l,t: func(t)

+    limit = [0]

+    foundArity = [False]

+    

+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples

+    if system_version[:2] >= (3,5):

+        def extract_stack(limit=0):

+            # special handling for Python 3.5.0 - extra deep call stack by 1

+            offset = -3 if system_version == (3,5,0) else -2

+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]

+            return [frame_summary[:2]]

+        def extract_tb(tb, limit=0):

+            frames = traceback.extract_tb(tb, limit=limit)

+            frame_summary = frames[-1]

+            return [frame_summary[:2]]

+    else:

+        extract_stack = traceback.extract_stack

+        extract_tb = traceback.extract_tb

+    

+    # synthesize what would be returned by traceback.extract_stack at the call to 

+    # user's parse action 'func', so that we don't incur call penalty at parse time

+    

+    LINE_DIFF = 6

+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 

+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!

+    this_line = extract_stack(limit=2)[-1]

+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)

+

+    def wrapper(*args):

+        while 1:

+            try:

+                ret = func(*args[limit[0]:])

+                foundArity[0] = True

+                return ret

+            except TypeError:

+                # re-raise TypeErrors if they did not come from our arity testing

+                if foundArity[0]:

+                    raise

+                else:

+                    try:

+                        tb = sys.exc_info()[-1]

+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:

+                            raise

+                    finally:

+                        del tb

+

+                if limit[0] <= maxargs:

+                    limit[0] += 1

+                    continue

+                raise

+

+    # copy func name to wrapper for sensible debug output

+    func_name = "<parse action>"

+    try:

+        func_name = getattr(func, '__name__', 

+                            getattr(func, '__class__').__name__)

+    except Exception:

+        func_name = str(func)

+    wrapper.__name__ = func_name

+

+    return wrapper

+

+class ParserElement(object):

+    """Abstract base level parser element class."""

+    DEFAULT_WHITE_CHARS = " \n\t\r"

+    verbose_stacktrace = False

+

+    @staticmethod

+    def setDefaultWhitespaceChars( chars ):

+        r"""

+        Overrides the default whitespace chars

+

+        Example::

+            # default whitespace chars are space, <TAB> and newline

+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']

+            

+            # change to just treat newline as significant

+            ParserElement.setDefaultWhitespaceChars(" \t")

+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']

+        """

+        ParserElement.DEFAULT_WHITE_CHARS = chars

+

+    @staticmethod

+    def inlineLiteralsUsing(cls):

+        """

+        Set class to be used for inclusion of string literals into a parser.

+        

+        Example::

+            # default literal class used is Literal

+            integer = Word(nums)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']

+

+

+            # change to Suppress

+            ParserElement.inlineLiteralsUsing(Suppress)

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']

+        """

+        ParserElement._literalStringClass = cls

+

+    def __init__( self, savelist=False ):

+        self.parseAction = list()

+        self.failAction = None

+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall

+        self.strRepr = None

+        self.resultsName = None

+        self.saveAsList = savelist

+        self.skipWhitespace = True

+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS

+        self.copyDefaultWhiteChars = True

+        self.mayReturnEmpty = False # used when checking for left-recursion

+        self.keepTabs = False

+        self.ignoreExprs = list()

+        self.debug = False

+        self.streamlined = False

+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index

+        self.errmsg = ""

+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)

+        self.debugActions = ( None, None, None ) #custom debug actions

+        self.re = None

+        self.callPreparse = True # used to avoid redundant calls to preParse

+        self.callDuringTry = False

+

+    def copy( self ):

+        """

+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions

+        for the same parsing pattern, using copies of the original parse element.

+        

+        Example::

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")

+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")

+            

+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))

+        prints::

+            [5120, 100, 655360, 268435456]

+        Equivalent form of C{expr.copy()} is just C{expr()}::

+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")

+        """

+        cpy = copy.copy( self )

+        cpy.parseAction = self.parseAction[:]

+        cpy.ignoreExprs = self.ignoreExprs[:]

+        if self.copyDefaultWhiteChars:

+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS

+        return cpy

+

+    def setName( self, name ):

+        """

+        Define name for this expression, makes debugging and exception messages clearer.

+        

+        Example::

+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)

+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)

+        """

+        self.name = name

+        self.errmsg = "Expected " + self.name

+        if hasattr(self,"exception"):

+            self.exception.msg = self.errmsg

+        return self

+

+    def setResultsName( self, name, listAllMatches=False ):

+        """

+        Define name for referencing matching tokens as a nested attribute

+        of the returned parse results.

+        NOTE: this returns a *copy* of the original C{ParserElement} object;

+        this is so that the client can define a basic element, such as an

+        integer, and reference it in multiple places with different names.

+

+        You can also set results names using the abbreviated syntax,

+        C{expr("name")} in place of C{expr.setResultsName("name")} - 

+        see L{I{__call__}<__call__>}.

+

+        Example::

+            date_str = (integer.setResultsName("year") + '/' 

+                        + integer.setResultsName("month") + '/' 

+                        + integer.setResultsName("day"))

+

+            # equivalent form:

+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")

+        """

+        newself = self.copy()

+        if name.endswith("*"):

+            name = name[:-1]

+            listAllMatches=True

+        newself.resultsName = name

+        newself.modalResults = not listAllMatches

+        return newself

+

+    def setBreak(self,breakFlag = True):

+        """Method to invoke the Python pdb debugger when this element is

+           about to be parsed. Set C{breakFlag} to True to enable, False to

+           disable.

+        """

+        if breakFlag:

+            _parseMethod = self._parse

+            def breaker(instring, loc, doActions=True, callPreParse=True):

+                import pdb

+                pdb.set_trace()

+                return _parseMethod( instring, loc, doActions, callPreParse )

+            breaker._originalParseMethod = _parseMethod

+            self._parse = breaker

+        else:

+            if hasattr(self._parse,"_originalParseMethod"):

+                self._parse = self._parse._originalParseMethod

+        return self

+

+    def setParseAction( self, *fns, **kwargs ):

+        """

+        Define one or more actions to perform when successfully matching parse element definition.

+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},

+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:

+         - s   = the original string being parsed (see note below)

+         - loc = the location of the matching substring

+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object

+        If the functions in fns modify the tokens, they can return them as the return

+        value from fn, and the modified list of tokens will replace the original.

+        Otherwise, fn does not need to return any value.

+

+        Optional keyword arguments:

+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing

+

+        Note: the default parsing behavior is to expand tabs in the input string

+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information

+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a

+        consistent view of the parsed string, the parse location, and line and column

+        positions within the parsed string.

+        

+        Example::

+            integer = Word(nums)

+            date_str = integer + '/' + integer + '/' + integer

+

+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']

+

+            # use parse action to convert to ints at parse time

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            date_str = integer + '/' + integer + '/' + integer

+

+            # note that integer fields are now ints, not strings

+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]

+        """

+        self.parseAction = list(map(_trim_arity, list(fns)))

+        self.callDuringTry = kwargs.get("callDuringTry", False)

+        return self

+

+    def addParseAction( self, *fns, **kwargs ):

+        """

+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.

+        

+        See examples in L{I{copy}<copy>}.

+        """

+        self.parseAction += list(map(_trim_arity, list(fns)))

+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)

+        return self

+

+    def addCondition(self, *fns, **kwargs):

+        """Add a boolean predicate function to expression's list of parse actions. See 

+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 

+        functions passed to C{addCondition} need to return boolean success/fail of the condition.

+

+        Optional keyword arguments:

+         - message = define a custom message to be used in the raised exception

+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException

+         

+        Example::

+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))

+            year_int = integer.copy()

+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")

+            date_str = year_int + '/' + integer + '/' + integer

+

+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)

+        """

+        msg = kwargs.get("message", "failed user-defined condition")

+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException

+        for fn in fns:

+            def pa(s,l,t):

+                if not bool(_trim_arity(fn)(s,l,t)):

+                    raise exc_type(s,l,msg)

+            self.parseAction.append(pa)

+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)

+        return self

+

+    def setFailAction( self, fn ):

+        """Define action to perform if parsing fails at this expression.

+           Fail acton fn is a callable function that takes the arguments

+           C{fn(s,loc,expr,err)} where:

+            - s = string being parsed

+            - loc = location where expression match was attempted and failed

+            - expr = the parse expression that failed

+            - err = the exception thrown

+           The function returns no value.  It may throw C{L{ParseFatalException}}

+           if it is desired to stop parsing immediately."""

+        self.failAction = fn

+        return self

+

+    def _skipIgnorables( self, instring, loc ):

+        exprsFound = True

+        while exprsFound:

+            exprsFound = False

+            for e in self.ignoreExprs:

+                try:

+                    while 1:

+                        loc,dummy = e._parse( instring, loc )

+                        exprsFound = True

+                except ParseException:

+                    pass

+        return loc

+

+    def preParse( self, instring, loc ):

+        if self.ignoreExprs:

+            loc = self._skipIgnorables( instring, loc )

+

+        if self.skipWhitespace:

+            wt = self.whiteChars

+            instrlen = len(instring)

+            while loc < instrlen and instring[loc] in wt:

+                loc += 1

+

+        return loc

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        return loc, []

+

+    def postParse( self, instring, loc, tokenlist ):

+        return tokenlist

+

+    #~ @profile

+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):

+        debugging = ( self.debug ) #and doActions )

+

+        if debugging or self.failAction:

+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))

+            if (self.debugActions[0] ):

+                self.debugActions[0]( instring, loc, self )

+            if callPreParse and self.callPreparse:

+                preloc = self.preParse( instring, loc )

+            else:

+                preloc = loc

+            tokensStart = preloc

+            try:

+                try:

+                    loc,tokens = self.parseImpl( instring, preloc, doActions )

+                except IndexError:

+                    raise ParseException( instring, len(instring), self.errmsg, self )

+            except ParseBaseException as err:

+                #~ print ("Exception raised:", err)

+                if self.debugActions[2]:

+                    self.debugActions[2]( instring, tokensStart, self, err )

+                if self.failAction:

+                    self.failAction( instring, tokensStart, self, err )

+                raise

+        else:

+            if callPreParse and self.callPreparse:

+                preloc = self.preParse( instring, loc )

+            else:

+                preloc = loc

+            tokensStart = preloc

+            if self.mayIndexError or preloc >= len(instring):

+                try:

+                    loc,tokens = self.parseImpl( instring, preloc, doActions )

+                except IndexError:

+                    raise ParseException( instring, len(instring), self.errmsg, self )

+            else:

+                loc,tokens = self.parseImpl( instring, preloc, doActions )

+

+        tokens = self.postParse( instring, loc, tokens )

+

+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )

+        if self.parseAction and (doActions or self.callDuringTry):

+            if debugging:

+                try:

+                    for fn in self.parseAction:

+                        tokens = fn( instring, tokensStart, retTokens )

+                        if tokens is not None:

+                            retTokens = ParseResults( tokens,

+                                                      self.resultsName,

+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),

+                                                      modal=self.modalResults )

+                except ParseBaseException as err:

+                    #~ print "Exception raised in user parse action:", err

+                    if (self.debugActions[2] ):

+                        self.debugActions[2]( instring, tokensStart, self, err )

+                    raise

+            else:

+                for fn in self.parseAction:

+                    tokens = fn( instring, tokensStart, retTokens )

+                    if tokens is not None:

+                        retTokens = ParseResults( tokens,

+                                                  self.resultsName,

+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),

+                                                  modal=self.modalResults )

+        if debugging:

+            #~ print ("Matched",self,"->",retTokens.asList())

+            if (self.debugActions[1] ):

+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )

+

+        return loc, retTokens

+

+    def tryParse( self, instring, loc ):

+        try:

+            return self._parse( instring, loc, doActions=False )[0]

+        except ParseFatalException:

+            raise ParseException( instring, loc, self.errmsg, self)

+    

+    def canParseNext(self, instring, loc):

+        try:

+            self.tryParse(instring, loc)

+        except (ParseException, IndexError):

+            return False

+        else:

+            return True

+

+    class _UnboundedCache(object):

+        def __init__(self):

+            cache = {}

+            self.not_in_cache = not_in_cache = object()

+

+            def get(self, key):

+                return cache.get(key, not_in_cache)

+

+            def set(self, key, value):

+                cache[key] = value

+

+            def clear(self):

+                cache.clear()

+                

+            def cache_len(self):

+                return len(cache)

+

+            self.get = types.MethodType(get, self)

+            self.set = types.MethodType(set, self)

+            self.clear = types.MethodType(clear, self)

+            self.__len__ = types.MethodType(cache_len, self)

+

+    if _OrderedDict is not None:

+        class _FifoCache(object):

+            def __init__(self, size):

+                self.not_in_cache = not_in_cache = object()

+

+                cache = _OrderedDict()

+

+                def get(self, key):

+                    return cache.get(key, not_in_cache)

+

+                def set(self, key, value):

+                    cache[key] = value

+                    while len(cache) > size:

+                        try:

+                            cache.popitem(False)

+                        except KeyError:

+                            pass

+

+                def clear(self):

+                    cache.clear()

+

+                def cache_len(self):

+                    return len(cache)

+

+                self.get = types.MethodType(get, self)

+                self.set = types.MethodType(set, self)

+                self.clear = types.MethodType(clear, self)

+                self.__len__ = types.MethodType(cache_len, self)

+

+    else:

+        class _FifoCache(object):

+            def __init__(self, size):

+                self.not_in_cache = not_in_cache = object()

+

+                cache = {}

+                key_fifo = collections.deque([], size)

+

+                def get(self, key):

+                    return cache.get(key, not_in_cache)

+

+                def set(self, key, value):

+                    cache[key] = value

+                    while len(key_fifo) > size:

+                        cache.pop(key_fifo.popleft(), None)

+                    key_fifo.append(key)

+

+                def clear(self):

+                    cache.clear()

+                    key_fifo.clear()

+

+                def cache_len(self):

+                    return len(cache)

+

+                self.get = types.MethodType(get, self)

+                self.set = types.MethodType(set, self)

+                self.clear = types.MethodType(clear, self)

+                self.__len__ = types.MethodType(cache_len, self)

+

+    # argument cache for optimizing repeated calls when backtracking through recursive expressions

+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail

+    packrat_cache_lock = RLock()

+    packrat_cache_stats = [0, 0]

+

+    # this method gets repeatedly called during backtracking with the same arguments -

+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression

+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):

+        HIT, MISS = 0, 1

+        lookup = (self, instring, loc, callPreParse, doActions)

+        with ParserElement.packrat_cache_lock:

+            cache = ParserElement.packrat_cache

+            value = cache.get(lookup)

+            if value is cache.not_in_cache:

+                ParserElement.packrat_cache_stats[MISS] += 1

+                try:

+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)

+                except ParseBaseException as pe:

+                    # cache a copy of the exception, without the traceback

+                    cache.set(lookup, pe.__class__(*pe.args))

+                    raise

+                else:

+                    cache.set(lookup, (value[0], value[1].copy()))

+                    return value

+            else:

+                ParserElement.packrat_cache_stats[HIT] += 1

+                if isinstance(value, Exception):

+                    raise value

+                return (value[0], value[1].copy())

+

+    _parse = _parseNoCache

+

+    @staticmethod

+    def resetCache():

+        ParserElement.packrat_cache.clear()

+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)

+

+    _packratEnabled = False

+    @staticmethod

+    def enablePackrat(cache_size_limit=128):

+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.

+           Repeated parse attempts at the same string location (which happens

+           often in many complex grammars) can immediately return a cached value,

+           instead of re-executing parsing/validating code.  Memoizing is done of

+           both valid results and parsing exceptions.

+           

+           Parameters:

+            - cache_size_limit - (default=C{128}) - if an integer value is provided

+              will limit the size of the packrat cache; if None is passed, then

+              the cache size will be unbounded; if 0 is passed, the cache will

+              be effectively disabled.

+            

+           This speedup may break existing programs that use parse actions that

+           have side-effects.  For this reason, packrat parsing is disabled when

+           you first import pyparsing.  To activate the packrat feature, your

+           program must call the class method C{ParserElement.enablePackrat()}.  If

+           your program uses C{psyco} to "compile as you go", you must call

+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,

+           Python will crash.  For best results, call C{enablePackrat()} immediately

+           after importing pyparsing.

+           

+           Example::

+               import pyparsing

+               pyparsing.ParserElement.enablePackrat()

+        """

+        if not ParserElement._packratEnabled:

+            ParserElement._packratEnabled = True

+            if cache_size_limit is None:

+                ParserElement.packrat_cache = ParserElement._UnboundedCache()

+            else:

+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)

+            ParserElement._parse = ParserElement._parseCache

+

+    def parseString( self, instring, parseAll=False ):

+        """

+        Execute the parse expression with the given string.

+        This is the main interface to the client code, once the complete

+        expression has been built.

+

+        If you want the grammar to require that the entire input string be

+        successfully parsed, then set C{parseAll} to True (equivalent to ending

+        the grammar with C{L{StringEnd()}}).

+

+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,

+        in order to report proper column numbers in parse actions.

+        If the input string contains tabs and

+        the grammar uses parse actions that use the C{loc} argument to index into the

+        string being parsed, you can ensure you have a consistent view of the input

+        string by:

+         - calling C{parseWithTabs} on your grammar before calling C{parseString}

+           (see L{I{parseWithTabs}<parseWithTabs>})

+         - define your parse action using the full C{(s,loc,toks)} signature, and

+           reference the input string using the parse action's C{s} argument

+         - explictly expand the tabs in your input string before calling

+           C{parseString}

+        

+        Example::

+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']

+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text

+        """

+        ParserElement.resetCache()

+        if not self.streamlined:

+            self.streamline()

+            #~ self.saveAsList = True

+        for e in self.ignoreExprs:

+            e.streamline()

+        if not self.keepTabs:

+            instring = instring.expandtabs()

+        try:

+            loc, tokens = self._parse( instring, 0 )

+            if parseAll:

+                loc = self.preParse( instring, loc )

+                se = Empty() + StringEnd()

+                se._parse( instring, loc )

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+        else:

+            return tokens

+

+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):

+        """

+        Scan the input string for expression matches.  Each match will return the

+        matching tokens, start location, and end location.  May be called with optional

+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If

+        C{overlap} is specified, then overlapping matches will be reported.

+

+        Note that the start and end locations are reported relative to the string

+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing

+        strings with embedded tabs.

+

+        Example::

+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"

+            print(source)

+            for tokens,start,end in Word(alphas).scanString(source):

+                print(' '*start + '^'*(end-start))

+                print(' '*start + tokens[0])

+        

+        prints::

+        

+            sldjf123lsdjjkf345sldkjf879lkjsfd987

+            ^^^^^

+            sldjf

+                    ^^^^^^^

+                    lsdjjkf

+                              ^^^^^^

+                              sldkjf

+                                       ^^^^^^

+                                       lkjsfd

+        """

+        if not self.streamlined:

+            self.streamline()

+        for e in self.ignoreExprs:

+            e.streamline()

+

+        if not self.keepTabs:

+            instring = _ustr(instring).expandtabs()

+        instrlen = len(instring)

+        loc = 0

+        preparseFn = self.preParse

+        parseFn = self._parse

+        ParserElement.resetCache()

+        matches = 0

+        try:

+            while loc <= instrlen and matches < maxMatches:

+                try:

+                    preloc = preparseFn( instring, loc )

+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )

+                except ParseException:

+                    loc = preloc+1

+                else:

+                    if nextLoc > loc:

+                        matches += 1

+                        yield tokens, preloc, nextLoc

+                        if overlap:

+                            nextloc = preparseFn( instring, loc )

+                            if nextloc > loc:

+                                loc = nextLoc

+                            else:

+                                loc += 1

+                        else:

+                            loc = nextLoc

+                    else:

+                        loc = preloc+1

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def transformString( self, instring ):

+        """

+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may

+        be returned from a parse action.  To use C{transformString}, define a grammar and

+        attach a parse action to it that modifies the returned token list.

+        Invoking C{transformString()} on a target string will then scan for matches,

+        and replace the matched text patterns according to the logic in the parse

+        action.  C{transformString()} returns the resulting transformed string.

+        

+        Example::

+            wd = Word(alphas)

+            wd.setParseAction(lambda toks: toks[0].title())

+            

+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))

+        Prints::

+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.

+        """

+        out = []

+        lastE = 0

+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to

+        # keep string locs straight between transformString and scanString

+        self.keepTabs = True

+        try:

+            for t,s,e in self.scanString( instring ):

+                out.append( instring[lastE:s] )

+                if t:

+                    if isinstance(t,ParseResults):

+                        out += t.asList()

+                    elif isinstance(t,list):

+                        out += t

+                    else:

+                        out.append(t)

+                lastE = e

+            out.append(instring[lastE:])

+            out = [o for o in out if o]

+            return "".join(map(_ustr,_flatten(out)))

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def searchString( self, instring, maxMatches=_MAX_INT ):

+        """

+        Another extension to C{L{scanString}}, simplifying the access to the tokens found

+        to match the given parse expression.  May be called with optional

+        C{maxMatches} argument, to clip searching after 'n' matches are found.

+        

+        Example::

+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters

+            cap_word = Word(alphas.upper(), alphas.lower())

+            

+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))

+

+            # the sum() builtin can be used to merge results into a single ParseResults object

+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))

+        prints::

+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]

+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']

+        """

+        try:

+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):

+        """

+        Generator method to split a string using the given expression as a separator.

+        May be called with optional C{maxsplit} argument, to limit the number of splits;

+        and the optional C{includeSeparators} argument (default=C{False}), if the separating

+        matching text should be included in the split results.

+        

+        Example::        

+            punc = oneOf(list(".,;:/-!?"))

+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))

+        prints::

+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']

+        """

+        splits = 0

+        last = 0

+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):

+            yield instring[last:s]

+            if includeSeparators:

+                yield t[0]

+            last = e

+        yield instring[last:]

+

+    def __add__(self, other ):

+        """

+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement

+        converts them to L{Literal}s by default.

+        

+        Example::

+            greet = Word(alphas) + "," + Word(alphas) + "!"

+            hello = "Hello, World!"

+            print (hello, "->", greet.parseString(hello))

+        Prints::

+            Hello, World! -> ['Hello', ',', 'World', '!']

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return And( [ self, other ] )

+

+    def __radd__(self, other ):

+        """

+        Implementation of + operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other + self

+

+    def __sub__(self, other):

+        """

+        Implementation of - operator, returns C{L{And}} with error stop

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return self + And._ErrorStop() + other

+

+    def __rsub__(self, other ):

+        """

+        Implementation of - operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other - self

+

+    def __mul__(self,other):

+        """

+        Implementation of * operator, allows use of C{expr * 3} in place of

+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer

+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples

+        may also include C{None} as in:

+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent

+              to C{expr*n + L{ZeroOrMore}(expr)}

+              (read as "at least n instances of C{expr}")

+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}

+              (read as "0 to n instances of C{expr}")

+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}

+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}

+

+        Note that C{expr*(None,n)} does not raise an exception if

+        more than n exprs exist in the input stream; that is,

+        C{expr*(None,n)} does not enforce a maximum number of expr

+        occurrences.  If this behavior is desired, then write

+        C{expr*(None,n) + ~expr}

+        """

+        if isinstance(other,int):

+            minElements, optElements = other,0

+        elif isinstance(other,tuple):

+            other = (other + (None, None))[:2]

+            if other[0] is None:

+                other = (0, other[1])

+            if isinstance(other[0],int) and other[1] is None:

+                if other[0] == 0:

+                    return ZeroOrMore(self)

+                if other[0] == 1:

+                    return OneOrMore(self)

+                else:

+                    return self*other[0] + ZeroOrMore(self)

+            elif isinstance(other[0],int) and isinstance(other[1],int):

+                minElements, optElements = other

+                optElements -= minElements

+            else:

+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))

+        else:

+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))

+

+        if minElements < 0:

+            raise ValueError("cannot multiply ParserElement by negative value")

+        if optElements < 0:

+            raise ValueError("second tuple value must be greater or equal to first tuple value")

+        if minElements == optElements == 0:

+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")

+

+        if (optElements):

+            def makeOptionalList(n):

+                if n>1:

+                    return Optional(self + makeOptionalList(n-1))

+                else:

+                    return Optional(self)

+            if minElements:

+                if minElements == 1:

+                    ret = self + makeOptionalList(optElements)

+                else:

+                    ret = And([self]*minElements) + makeOptionalList(optElements)

+            else:

+                ret = makeOptionalList(optElements)

+        else:

+            if minElements == 1:

+                ret = self

+            else:

+                ret = And([self]*minElements)

+        return ret

+

+    def __rmul__(self, other):

+        return self.__mul__(other)

+

+    def __or__(self, other ):

+        """

+        Implementation of | operator - returns C{L{MatchFirst}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return MatchFirst( [ self, other ] )

+

+    def __ror__(self, other ):

+        """

+        Implementation of | operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other | self

+

+    def __xor__(self, other ):

+        """

+        Implementation of ^ operator - returns C{L{Or}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return Or( [ self, other ] )

+

+    def __rxor__(self, other ):

+        """

+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other ^ self

+

+    def __and__(self, other ):

+        """

+        Implementation of & operator - returns C{L{Each}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return Each( [ self, other ] )

+

+    def __rand__(self, other ):

+        """

+        Implementation of & operator when left operand is not a C{L{ParserElement}}

+        """

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        if not isinstance( other, ParserElement ):

+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),

+                    SyntaxWarning, stacklevel=2)

+            return None

+        return other & self

+

+    def __invert__( self ):

+        """

+        Implementation of ~ operator - returns C{L{NotAny}}

+        """

+        return NotAny( self )

+

+    def __call__(self, name=None):

+        """

+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.

+        

+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be

+        passed as C{True}.

+           

+        If C{name} is omitted, same as calling C{L{copy}}.

+

+        Example::

+            # these are equivalent

+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")

+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             

+        """

+        if name is not None:

+            return self.setResultsName(name)

+        else:

+            return self.copy()

+

+    def suppress( self ):

+        """

+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from

+        cluttering up returned output.

+        """

+        return Suppress( self )

+

+    def leaveWhitespace( self ):

+        """

+        Disables the skipping of whitespace before matching the characters in the

+        C{ParserElement}'s defined pattern.  This is normally only used internally by

+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.

+        """

+        self.skipWhitespace = False

+        return self

+

+    def setWhitespaceChars( self, chars ):

+        """

+        Overrides the default whitespace chars

+        """

+        self.skipWhitespace = True

+        self.whiteChars = chars

+        self.copyDefaultWhiteChars = False

+        return self

+

+    def parseWithTabs( self ):

+        """

+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.

+        Must be called before C{parseString} when the input grammar contains elements that

+        match C{<TAB>} characters.

+        """

+        self.keepTabs = True

+        return self

+

+    def ignore( self, other ):

+        """

+        Define expression to be ignored (e.g., comments) while doing pattern

+        matching; may be called repeatedly, to define multiple comment or other

+        ignorable patterns.

+        

+        Example::

+            patt = OneOrMore(Word(alphas))

+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']

+            

+            patt.ignore(cStyleComment)

+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']

+        """

+        if isinstance(other, basestring):

+            other = Suppress(other)

+

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                self.ignoreExprs.append(other)

+        else:

+            self.ignoreExprs.append( Suppress( other.copy() ) )

+        return self

+

+    def setDebugActions( self, startAction, successAction, exceptionAction ):

+        """

+        Enable display of debugging messages while doing pattern matching.

+        """

+        self.debugActions = (startAction or _defaultStartDebugAction,

+                             successAction or _defaultSuccessDebugAction,

+                             exceptionAction or _defaultExceptionDebugAction)

+        self.debug = True

+        return self

+

+    def setDebug( self, flag=True ):

+        """

+        Enable display of debugging messages while doing pattern matching.

+        Set C{flag} to True to enable, False to disable.

+

+        Example::

+            wd = Word(alphas).setName("alphaword")

+            integer = Word(nums).setName("numword")

+            term = wd | integer

+            

+            # turn on debugging for wd

+            wd.setDebug()

+

+            OneOrMore(term).parseString("abc 123 xyz 890")

+        

+        prints::

+            Match alphaword at loc 0(1,1)

+            Matched alphaword -> ['abc']

+            Match alphaword at loc 3(1,4)

+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)

+            Match alphaword at loc 7(1,8)

+            Matched alphaword -> ['xyz']

+            Match alphaword at loc 11(1,12)

+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)

+            Match alphaword at loc 15(1,16)

+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)

+

+        The output shown is that produced by the default debug actions - custom debug actions can be

+        specified using L{setDebugActions}. Prior to attempting

+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}

+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}

+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,

+        which makes debugging and exception messages easier to understand - for instance, the default

+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.

+        """

+        if flag:

+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )

+        else:

+            self.debug = False

+        return self

+

+    def __str__( self ):

+        return self.name

+

+    def __repr__( self ):

+        return _ustr(self)

+

+    def streamline( self ):

+        self.streamlined = True

+        self.strRepr = None

+        return self

+

+    def checkRecursion( self, parseElementList ):

+        pass

+

+    def validate( self, validateTrace=[] ):

+        """

+        Check defined expressions for valid structure, check for infinite recursive definitions.

+        """

+        self.checkRecursion( [] )

+

+    def parseFile( self, file_or_filename, parseAll=False ):

+        """

+        Execute the parse expression on the given file or filename.

+        If a filename is specified (instead of a file object),

+        the entire file is opened, read, and closed before parsing.

+        """

+        try:

+            file_contents = file_or_filename.read()

+        except AttributeError:

+            with open(file_or_filename, "r") as f:

+                file_contents = f.read()

+        try:

+            return self.parseString(file_contents, parseAll)

+        except ParseBaseException as exc:

+            if ParserElement.verbose_stacktrace:

+                raise

+            else:

+                # catch and re-raise exception from here, clears out pyparsing internal stack trace

+                raise exc

+

+    def __eq__(self,other):

+        if isinstance(other, ParserElement):

+            return self is other or vars(self) == vars(other)

+        elif isinstance(other, basestring):

+            return self.matches(other)

+        else:

+            return super(ParserElement,self)==other

+

+    def __ne__(self,other):

+        return not (self == other)

+

+    def __hash__(self):

+        return hash(id(self))

+

+    def __req__(self,other):

+        return self == other

+

+    def __rne__(self,other):

+        return not (self == other)

+

+    def matches(self, testString, parseAll=True):

+        """

+        Method for quick testing of a parser against a test string. Good for simple 

+        inline microtests of sub expressions while building up larger parser.

+           

+        Parameters:

+         - testString - to test against this expression for a match

+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests

+            

+        Example::

+            expr = Word(nums)

+            assert expr.matches("100")

+        """

+        try:

+            self.parseString(_ustr(testString), parseAll=parseAll)

+            return True

+        except ParseBaseException:

+            return False

+                

+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):

+        """

+        Execute the parse expression on a series of test strings, showing each

+        test, the parsed results or where the parse failed. Quick and easy way to

+        run a parse expression against a list of sample strings.

+           

+        Parameters:

+         - tests - a list of separate test strings, or a multiline string of test strings

+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           

+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 

+              string; pass None to disable comment filtering

+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;

+              if False, only dump nested list

+         - printResults - (default=C{True}) prints test output to stdout

+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing

+

+        Returns: a (success, results) tuple, where success indicates that all tests succeeded

+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 

+        test's output

+        

+        Example::

+            number_expr = pyparsing_common.number.copy()

+

+            result = number_expr.runTests('''

+                # unsigned integer

+                100

+                # negative integer

+                -100

+                # float with scientific notation

+                6.02e23

+                # integer with scientific notation

+                1e-12

+                ''')

+            print("Success" if result[0] else "Failed!")

+

+            result = number_expr.runTests('''

+                # stray character

+                100Z

+                # missing leading digit before '.'

+                -.100

+                # too many '.'

+                3.14.159

+                ''', failureTests=True)

+            print("Success" if result[0] else "Failed!")

+        prints::

+            # unsigned integer

+            100

+            [100]

+

+            # negative integer

+            -100

+            [-100]

+

+            # float with scientific notation

+            6.02e23

+            [6.02e+23]

+

+            # integer with scientific notation

+            1e-12

+            [1e-12]

+

+            Success

+            

+            # stray character

+            100Z

+               ^

+            FAIL: Expected end of text (at char 3), (line:1, col:4)

+

+            # missing leading digit before '.'

+            -.100

+            ^

+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)

+

+            # too many '.'

+            3.14.159

+                ^

+            FAIL: Expected end of text (at char 4), (line:1, col:5)

+

+            Success

+

+        Each test string must be on a single line. If you want to test a string that spans multiple

+        lines, create a test like this::

+

+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")

+        

+        (Note that this is a raw string literal, you must include the leading 'r'.)

+        """

+        if isinstance(tests, basestring):

+            tests = list(map(str.strip, tests.rstrip().splitlines()))

+        if isinstance(comment, basestring):

+            comment = Literal(comment)

+        allResults = []

+        comments = []

+        success = True

+        for t in tests:

+            if comment is not None and comment.matches(t, False) or comments and not t:

+                comments.append(t)

+                continue

+            if not t:

+                continue

+            out = ['\n'.join(comments), t]

+            comments = []

+            try:

+                t = t.replace(r'\n','\n')

+                result = self.parseString(t, parseAll=parseAll)

+                out.append(result.dump(full=fullDump))

+                success = success and not failureTests

+            except ParseBaseException as pe:

+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""

+                if '\n' in t:

+                    out.append(line(pe.loc, t))

+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)

+                else:

+                    out.append(' '*pe.loc + '^' + fatal)

+                out.append("FAIL: " + str(pe))

+                success = success and failureTests

+                result = pe

+            except Exception as exc:

+                out.append("FAIL-EXCEPTION: " + str(exc))

+                success = success and failureTests

+                result = exc

+

+            if printResults:

+                if fullDump:

+                    out.append('')

+                print('\n'.join(out))

+

+            allResults.append((t, result))

+        

+        return success, allResults

+

+        

+class Token(ParserElement):

+    """

+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.

+    """

+    def __init__( self ):

+        super(Token,self).__init__( savelist=False )

+

+

+class Empty(Token):

+    """

+    An empty token, will always match.

+    """

+    def __init__( self ):

+        super(Empty,self).__init__()

+        self.name = "Empty"

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+

+

+class NoMatch(Token):

+    """

+    A token that will never match.

+    """

+    def __init__( self ):

+        super(NoMatch,self).__init__()

+        self.name = "NoMatch"

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+        self.errmsg = "Unmatchable token"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        raise ParseException(instring, loc, self.errmsg, self)

+

+

+class Literal(Token):

+    """

+    Token to exactly match a specified string.

+    

+    Example::

+        Literal('blah').parseString('blah')  # -> ['blah']

+        Literal('blah').parseString('blahfooblah')  # -> ['blah']

+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"

+    

+    For case-insensitive matching, use L{CaselessLiteral}.

+    

+    For keyword matching (force word break before and after the matched string),

+    use L{Keyword} or L{CaselessKeyword}.

+    """

+    def __init__( self, matchString ):

+        super(Literal,self).__init__()

+        self.match = matchString

+        self.matchLen = len(matchString)

+        try:

+            self.firstMatchChar = matchString[0]

+        except IndexError:

+            warnings.warn("null string passed to Literal; use Empty() instead",

+                            SyntaxWarning, stacklevel=2)

+            self.__class__ = Empty

+        self.name = '"%s"' % _ustr(self.match)

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = False

+        self.mayIndexError = False

+

+    # Performance tuning: this routine gets called a *lot*

+    # if this is a single character match string  and the first character matches,

+    # short-circuit as quickly as possible, and avoid calling startswith

+    #~ @profile

+    def parseImpl( self, instring, loc, doActions=True ):

+        if (instring[loc] == self.firstMatchChar and

+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):

+            return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+_L = Literal

+ParserElement._literalStringClass = Literal

+

+class Keyword(Token):

+    """

+    Token to exactly match a specified string as a keyword, that is, it must be

+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:

+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.

+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}

+    Accepts two optional constructor arguments in addition to the keyword string:

+     - C{identChars} is a string of characters that would be valid identifier characters,

+          defaulting to all alphanumerics + "_" and "$"

+     - C{caseless} allows case-insensitive matching, default is C{False}.

+       

+    Example::

+        Keyword("start").parseString("start")  # -> ['start']

+        Keyword("start").parseString("starting")  # -> Exception

+

+    For case-insensitive matching, use L{CaselessKeyword}.

+    """

+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"

+

+    def __init__( self, matchString, identChars=None, caseless=False ):

+        super(Keyword,self).__init__()

+        if identChars is None:

+            identChars = Keyword.DEFAULT_KEYWORD_CHARS

+        self.match = matchString

+        self.matchLen = len(matchString)

+        try:

+            self.firstMatchChar = matchString[0]

+        except IndexError:

+            warnings.warn("null string passed to Keyword; use Empty() instead",

+                            SyntaxWarning, stacklevel=2)

+        self.name = '"%s"' % self.match

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = False

+        self.mayIndexError = False

+        self.caseless = caseless

+        if caseless:

+            self.caselessmatch = matchString.upper()

+            identChars = identChars.upper()

+        self.identChars = set(identChars)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.caseless:

+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and

+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and

+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):

+                return loc+self.matchLen, self.match

+        else:

+            if (instring[loc] == self.firstMatchChar and

+                (self.matchLen==1 or instring.startswith(self.match,loc)) and

+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and

+                (loc == 0 or instring[loc-1] not in self.identChars) ):

+                return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+

+    def copy(self):

+        c = super(Keyword,self).copy()

+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS

+        return c

+

+    @staticmethod

+    def setDefaultKeywordChars( chars ):

+        """Overrides the default Keyword chars

+        """

+        Keyword.DEFAULT_KEYWORD_CHARS = chars

+

+class CaselessLiteral(Literal):

+    """

+    Token to match a specified string, ignoring case of letters.

+    Note: the matched results will always be in the case of the given

+    match string, NOT the case of the input text.

+

+    Example::

+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']

+        

+    (Contrast with example for L{CaselessKeyword}.)

+    """

+    def __init__( self, matchString ):

+        super(CaselessLiteral,self).__init__( matchString.upper() )

+        # Preserve the defining literal.

+        self.returnString = matchString

+        self.name = "'%s'" % self.returnString

+        self.errmsg = "Expected " + self.name

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if instring[ loc:loc+self.matchLen ].upper() == self.match:

+            return loc+self.matchLen, self.returnString

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class CaselessKeyword(Keyword):

+    """

+    Caseless version of L{Keyword}.

+

+    Example::

+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']

+        

+    (Contrast with example for L{CaselessLiteral}.)

+    """

+    def __init__( self, matchString, identChars=None ):

+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and

+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):

+            return loc+self.matchLen, self.match

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class CloseMatch(Token):

+    """

+    A variation on L{Literal} which matches "close" matches, that is, 

+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:

+     - C{match_string} - string to be matched

+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match

+    

+    The results from a successful parse will contain the matched text from the input string and the following named results:

+     - C{mismatches} - a list of the positions within the match_string where mismatches were found

+     - C{original} - the original match_string used to compare against the input string

+    

+    If C{mismatches} is an empty list, then the match was an exact match.

+    

+    Example::

+        patt = CloseMatch("ATCATCGAATGGA")

+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})

+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)

+

+        # exact match

+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})

+

+        # close match allowing up to 2 mismatches

+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)

+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})

+    """

+    def __init__(self, match_string, maxMismatches=1):

+        super(CloseMatch,self).__init__()

+        self.name = match_string

+        self.match_string = match_string

+        self.maxMismatches = maxMismatches

+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)

+        self.mayIndexError = False

+        self.mayReturnEmpty = False

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        start = loc

+        instrlen = len(instring)

+        maxloc = start + len(self.match_string)

+

+        if maxloc <= instrlen:

+            match_string = self.match_string

+            match_stringloc = 0

+            mismatches = []

+            maxMismatches = self.maxMismatches

+

+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):

+                src,mat = s_m

+                if src != mat:

+                    mismatches.append(match_stringloc)

+                    if len(mismatches) > maxMismatches:

+                        break

+            else:

+                loc = match_stringloc + 1

+                results = ParseResults([instring[start:loc]])

+                results['original'] = self.match_string

+                results['mismatches'] = mismatches

+                return loc, results

+

+        raise ParseException(instring, loc, self.errmsg, self)

+

+

+class Word(Token):

+    """

+    Token for matching words composed of allowed character sets.

+    Defined with string containing all allowed initial characters,

+    an optional string containing allowed body characters (if omitted,

+    defaults to the initial character set), and an optional minimum,

+    maximum, and/or exact length.  The default value for C{min} is 1 (a

+    minimum value < 1 is not valid); the default values for C{max} and C{exact}

+    are 0, meaning no maximum or exact length restriction. An optional

+    C{excludeChars} parameter can list characters that might be found in 

+    the input C{bodyChars} string; useful to define a word of all printables

+    except for one or two characters, for instance.

+    

+    L{srange} is useful for defining custom character set strings for defining 

+    C{Word} expressions, using range notation from regular expression character sets.

+    

+    A common mistake is to use C{Word} to match a specific literal string, as in 

+    C{Word("Address")}. Remember that C{Word} uses the string argument to define

+    I{sets} of matchable characters. This expression would match "Add", "AAA",

+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.

+    To match an exact literal string, use L{Literal} or L{Keyword}.

+

+    pyparsing includes helper strings for building Words:

+     - L{alphas}

+     - L{nums}

+     - L{alphanums}

+     - L{hexnums}

+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)

+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)

+     - L{printables} (any non-whitespace character)

+

+    Example::

+        # a word composed of digits

+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))

+        

+        # a word with a leading capital, and zero or more lowercase

+        capital_word = Word(alphas.upper(), alphas.lower())

+

+        # hostnames are alphanumeric, with leading alpha, and '-'

+        hostname = Word(alphas, alphanums+'-')

+        

+        # roman numeral (not a strict parser, accepts invalid mix of characters)

+        roman = Word("IVXLCDM")

+        

+        # any string of non-whitespace characters, except for ','

+        csv_value = Word(printables, excludeChars=",")

+    """

+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):

+        super(Word,self).__init__()

+        if excludeChars:

+            initChars = ''.join(c for c in initChars if c not in excludeChars)

+            if bodyChars:

+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)

+        self.initCharsOrig = initChars

+        self.initChars = set(initChars)

+        if bodyChars :

+            self.bodyCharsOrig = bodyChars

+            self.bodyChars = set(bodyChars)

+        else:

+            self.bodyCharsOrig = initChars

+            self.bodyChars = set(initChars)

+

+        self.maxSpecified = max > 0

+

+        if min < 1:

+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.asKeyword = asKeyword

+

+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):

+            if self.bodyCharsOrig == self.initCharsOrig:

+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)

+            elif len(self.initCharsOrig) == 1:

+                self.reString = "%s[%s]*" % \

+                                      (re.escape(self.initCharsOrig),

+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)

+            else:

+                self.reString = "[%s][%s]*" % \

+                                      (_escapeRegexRangeChars(self.initCharsOrig),

+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)

+            if self.asKeyword:

+                self.reString = r"\b"+self.reString+r"\b"

+            try:

+                self.re = re.compile( self.reString )

+            except Exception:

+                self.re = None

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.re:

+            result = self.re.match(instring,loc)

+            if not result:

+                raise ParseException(instring, loc, self.errmsg, self)

+

+            loc = result.end()

+            return loc, result.group()

+

+        if not(instring[ loc ] in self.initChars):

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        start = loc

+        loc += 1

+        instrlen = len(instring)

+        bodychars = self.bodyChars

+        maxloc = start + self.maxLen

+        maxloc = min( maxloc, instrlen )

+        while loc < maxloc and instring[loc] in bodychars:

+            loc += 1

+

+        throwException = False

+        if loc - start < self.minLen:

+            throwException = True

+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:

+            throwException = True

+        if self.asKeyword:

+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):

+                throwException = True

+

+        if throwException:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+    def __str__( self ):

+        try:

+            return super(Word,self).__str__()

+        except Exception:

+            pass

+

+

+        if self.strRepr is None:

+

+            def charsAsStr(s):

+                if len(s)>4:

+                    return s[:4]+"..."

+                else:

+                    return s

+

+            if ( self.initCharsOrig != self.bodyCharsOrig ):

+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )

+            else:

+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)

+

+        return self.strRepr

+

+

+class Regex(Token):

+    r"""

+    Token for matching strings that match a given regular expression.

+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.

+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 

+    named parse results.

+

+    Example::

+        realnum = Regex(r"[+-]?\d+\.\d*")

+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')

+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression

+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")

+    """

+    compiledREtype = type(re.compile("[A-Z]"))

+    def __init__( self, pattern, flags=0):

+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""

+        super(Regex,self).__init__()

+

+        if isinstance(pattern, basestring):

+            if not pattern:

+                warnings.warn("null string passed to Regex; use Empty() instead",

+                        SyntaxWarning, stacklevel=2)

+

+            self.pattern = pattern

+            self.flags = flags

+

+            try:

+                self.re = re.compile(self.pattern, self.flags)

+                self.reString = self.pattern

+            except sre_constants.error:

+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,

+                    SyntaxWarning, stacklevel=2)

+                raise

+

+        elif isinstance(pattern, Regex.compiledREtype):

+            self.re = pattern

+            self.pattern = \

+            self.reString = str(pattern)

+            self.flags = flags

+            

+        else:

+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        result = self.re.match(instring,loc)

+        if not result:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        loc = result.end()

+        d = result.groupdict()

+        ret = ParseResults(result.group())

+        if d:

+            for k in d:

+                ret[k] = d[k]

+        return loc,ret

+

+    def __str__( self ):

+        try:

+            return super(Regex,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "Re:(%s)" % repr(self.pattern)

+

+        return self.strRepr

+

+

+class QuotedString(Token):

+    r"""

+    Token for matching strings that are delimited by quoting characters.

+    

+    Defined with the following parameters:

+        - quoteChar - string of one or more characters defining the quote delimiting string

+        - escChar - character to escape quotes, typically backslash (default=C{None})

+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})

+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})

+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})

+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)

+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})

+

+    Example::

+        qs = QuotedString('"')

+        print(qs.searchString('lsjdf "This is the quote" sldjf'))

+        complex_qs = QuotedString('{{', endQuoteChar='}}')

+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))

+        sql_qs = QuotedString('"', escQuote='""')

+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))

+    prints::

+        [['This is the quote']]

+        [['This is the "quote"']]

+        [['This is the quote with "embedded" quotes']]

+    """

+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):

+        super(QuotedString,self).__init__()

+

+        # remove white space from quote chars - wont work anyway

+        quoteChar = quoteChar.strip()

+        if not quoteChar:

+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)

+            raise SyntaxError()

+

+        if endQuoteChar is None:

+            endQuoteChar = quoteChar

+        else:

+            endQuoteChar = endQuoteChar.strip()

+            if not endQuoteChar:

+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)

+                raise SyntaxError()

+

+        self.quoteChar = quoteChar

+        self.quoteCharLen = len(quoteChar)

+        self.firstQuoteChar = quoteChar[0]

+        self.endQuoteChar = endQuoteChar

+        self.endQuoteCharLen = len(endQuoteChar)

+        self.escChar = escChar

+        self.escQuote = escQuote

+        self.unquoteResults = unquoteResults

+        self.convertWhitespaceEscapes = convertWhitespaceEscapes

+

+        if multiline:

+            self.flags = re.MULTILINE | re.DOTALL

+            self.pattern = r'%s(?:[^%s%s]' % \

+                ( re.escape(self.quoteChar),

+                  _escapeRegexRangeChars(self.endQuoteChar[0]),

+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )

+        else:

+            self.flags = 0

+            self.pattern = r'%s(?:[^%s\n\r%s]' % \

+                ( re.escape(self.quoteChar),

+                  _escapeRegexRangeChars(self.endQuoteChar[0]),

+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )

+        if len(self.endQuoteChar) > 1:

+            self.pattern += (

+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),

+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))

+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'

+                )

+        if escQuote:

+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))

+        if escChar:

+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))

+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"

+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))

+

+        try:

+            self.re = re.compile(self.pattern, self.flags)

+            self.reString = self.pattern

+        except sre_constants.error:

+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,

+                SyntaxWarning, stacklevel=2)

+            raise

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayIndexError = False

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None

+        if not result:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        loc = result.end()

+        ret = result.group()

+

+        if self.unquoteResults:

+

+            # strip off quotes

+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]

+

+            if isinstance(ret,basestring):

+                # replace escaped whitespace

+                if '\\' in ret and self.convertWhitespaceEscapes:

+                    ws_map = {

+                        r'\t' : '\t',

+                        r'\n' : '\n',

+                        r'\f' : '\f',

+                        r'\r' : '\r',

+                    }

+                    for wslit,wschar in ws_map.items():

+                        ret = ret.replace(wslit, wschar)

+

+                # replace escaped characters

+                if self.escChar:

+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)

+

+                # replace escaped quotes

+                if self.escQuote:

+                    ret = ret.replace(self.escQuote, self.endQuoteChar)

+

+        return loc, ret

+

+    def __str__( self ):

+        try:

+            return super(QuotedString,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)

+

+        return self.strRepr

+

+

+class CharsNotIn(Token):

+    """

+    Token for matching words composed of characters I{not} in a given set (will

+    include whitespace in matched characters if not listed in the provided exclusion set - see example).

+    Defined with string containing all disallowed characters, and an optional

+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a

+    minimum value < 1 is not valid); the default values for C{max} and C{exact}

+    are 0, meaning no maximum or exact length restriction.

+

+    Example::

+        # define a comma-separated-value as anything that is not a ','

+        csv_value = CharsNotIn(',')

+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))

+    prints::

+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']

+    """

+    def __init__( self, notChars, min=1, max=0, exact=0 ):

+        super(CharsNotIn,self).__init__()

+        self.skipWhitespace = False

+        self.notChars = notChars

+

+        if min < 1:

+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+        self.name = _ustr(self)

+        self.errmsg = "Expected " + self.name

+        self.mayReturnEmpty = ( self.minLen == 0 )

+        self.mayIndexError = False

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if instring[loc] in self.notChars:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        start = loc

+        loc += 1

+        notchars = self.notChars

+        maxlen = min( start+self.maxLen, len(instring) )

+        while loc < maxlen and \

+              (instring[loc] not in notchars):

+            loc += 1

+

+        if loc - start < self.minLen:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+    def __str__( self ):

+        try:

+            return super(CharsNotIn, self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            if len(self.notChars) > 4:

+                self.strRepr = "!W:(%s...)" % self.notChars[:4]

+            else:

+                self.strRepr = "!W:(%s)" % self.notChars

+

+        return self.strRepr

+

+class White(Token):

+    """

+    Special matching class for matching whitespace.  Normally, whitespace is ignored

+    by pyparsing grammars.  This class is included when some whitespace structures

+    are significant.  Define with a string containing the whitespace characters to be

+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,

+    as defined for the C{L{Word}} class.

+    """

+    whiteStrs = {

+        " " : "<SPC>",

+        "\t": "<TAB>",

+        "\n": "<LF>",

+        "\r": "<CR>",

+        "\f": "<FF>",

+        }

+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):

+        super(White,self).__init__()

+        self.matchWhite = ws

+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )

+        #~ self.leaveWhitespace()

+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))

+        self.mayReturnEmpty = True

+        self.errmsg = "Expected " + self.name

+

+        self.minLen = min

+

+        if max > 0:

+            self.maxLen = max

+        else:

+            self.maxLen = _MAX_INT

+

+        if exact > 0:

+            self.maxLen = exact

+            self.minLen = exact

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if not(instring[ loc ] in self.matchWhite):

+            raise ParseException(instring, loc, self.errmsg, self)

+        start = loc

+        loc += 1

+        maxloc = start + self.maxLen

+        maxloc = min( maxloc, len(instring) )

+        while loc < maxloc and instring[loc] in self.matchWhite:

+            loc += 1

+

+        if loc - start < self.minLen:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        return loc, instring[start:loc]

+

+

+class _PositionToken(Token):

+    def __init__( self ):

+        super(_PositionToken,self).__init__()

+        self.name=self.__class__.__name__

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+

+class GoToColumn(_PositionToken):

+    """

+    Token to advance to a specific column of input text; useful for tabular report scraping.

+    """

+    def __init__( self, colno ):

+        super(GoToColumn,self).__init__()

+        self.col = colno

+

+    def preParse( self, instring, loc ):

+        if col(loc,instring) != self.col:

+            instrlen = len(instring)

+            if self.ignoreExprs:

+                loc = self._skipIgnorables( instring, loc )

+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :

+                loc += 1

+        return loc

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        thiscol = col( loc, instring )

+        if thiscol > self.col:

+            raise ParseException( instring, loc, "Text not in expected column", self )

+        newloc = loc + self.col - thiscol

+        ret = instring[ loc: newloc ]

+        return newloc, ret

+

+

+class LineStart(_PositionToken):

+    """

+    Matches if current position is at the beginning of a line within the parse string

+    

+    Example::

+    

+        test = '''\

+        AAA this line

+        AAA and this line

+          AAA but not this one

+        B AAA and definitely not this one

+        '''

+

+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):

+            print(t)

+    

+    Prints::

+        ['AAA', ' this line']

+        ['AAA', ' and this line']    

+

+    """

+    def __init__( self ):

+        super(LineStart,self).__init__()

+        self.errmsg = "Expected start of line"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if col(loc, instring) == 1:

+            return loc, []

+        raise ParseException(instring, loc, self.errmsg, self)

+

+class LineEnd(_PositionToken):

+    """

+    Matches if current position is at the end of a line within the parse string

+    """

+    def __init__( self ):

+        super(LineEnd,self).__init__()

+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )

+        self.errmsg = "Expected end of line"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc<len(instring):

+            if instring[loc] == "\n":

+                return loc+1, "\n"

+            else:

+                raise ParseException(instring, loc, self.errmsg, self)

+        elif loc == len(instring):

+            return loc+1, []

+        else:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+class StringStart(_PositionToken):

+    """

+    Matches if current position is at the beginning of the parse string

+    """

+    def __init__( self ):

+        super(StringStart,self).__init__()

+        self.errmsg = "Expected start of text"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc != 0:

+            # see if entire string up to here is just whitespace and ignoreables

+            if loc != self.preParse( instring, 0 ):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+class StringEnd(_PositionToken):

+    """

+    Matches if current position is at the end of the parse string

+    """

+    def __init__( self ):

+        super(StringEnd,self).__init__()

+        self.errmsg = "Expected end of text"

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if loc < len(instring):

+            raise ParseException(instring, loc, self.errmsg, self)

+        elif loc == len(instring):

+            return loc+1, []

+        elif loc > len(instring):

+            return loc, []

+        else:

+            raise ParseException(instring, loc, self.errmsg, self)

+

+class WordStart(_PositionToken):

+    """

+    Matches if the current position is at the beginning of a Word, and

+    is not preceded by any character in a given set of C{wordChars}

+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,

+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of

+    the string being parsed, or at the beginning of a line.

+    """

+    def __init__(self, wordChars = printables):

+        super(WordStart,self).__init__()

+        self.wordChars = set(wordChars)

+        self.errmsg = "Not at the start of a word"

+

+    def parseImpl(self, instring, loc, doActions=True ):

+        if loc != 0:

+            if (instring[loc-1] in self.wordChars or

+                instring[loc] not in self.wordChars):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+class WordEnd(_PositionToken):

+    """

+    Matches if the current position is at the end of a Word, and

+    is not followed by any character in a given set of C{wordChars}

+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,

+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of

+    the string being parsed, or at the end of a line.

+    """

+    def __init__(self, wordChars = printables):

+        super(WordEnd,self).__init__()

+        self.wordChars = set(wordChars)

+        self.skipWhitespace = False

+        self.errmsg = "Not at the end of a word"

+

+    def parseImpl(self, instring, loc, doActions=True ):

+        instrlen = len(instring)

+        if instrlen>0 and loc<instrlen:

+            if (instring[loc] in self.wordChars or

+                instring[loc-1] not in self.wordChars):

+                raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+

+class ParseExpression(ParserElement):

+    """

+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(ParseExpression,self).__init__(savelist)

+        if isinstance( exprs, _generatorType ):

+            exprs = list(exprs)

+

+        if isinstance( exprs, basestring ):

+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]

+        elif isinstance( exprs, Iterable ):

+            exprs = list(exprs)

+            # if sequence of strings provided, wrap with Literal

+            if all(isinstance(expr, basestring) for expr in exprs):

+                exprs = map(ParserElement._literalStringClass, exprs)

+            self.exprs = list(exprs)

+        else:

+            try:

+                self.exprs = list( exprs )

+            except TypeError:

+                self.exprs = [ exprs ]

+        self.callPreparse = False

+

+    def __getitem__( self, i ):

+        return self.exprs[i]

+

+    def append( self, other ):

+        self.exprs.append( other )

+        self.strRepr = None

+        return self

+

+    def leaveWhitespace( self ):

+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on

+           all contained expressions."""

+        self.skipWhitespace = False

+        self.exprs = [ e.copy() for e in self.exprs ]

+        for e in self.exprs:

+            e.leaveWhitespace()

+        return self

+

+    def ignore( self, other ):

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                super( ParseExpression, self).ignore( other )

+                for e in self.exprs:

+                    e.ignore( self.ignoreExprs[-1] )

+        else:

+            super( ParseExpression, self).ignore( other )

+            for e in self.exprs:

+                e.ignore( self.ignoreExprs[-1] )

+        return self

+

+    def __str__( self ):

+        try:

+            return super(ParseExpression,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None:

+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )

+        return self.strRepr

+

+    def streamline( self ):

+        super(ParseExpression,self).streamline()

+

+        for e in self.exprs:

+            e.streamline()

+

+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )

+        # but only if there are no parse actions or resultsNames on the nested And's

+        # (likewise for Or's and MatchFirst's)

+        if ( len(self.exprs) == 2 ):

+            other = self.exprs[0]

+            if ( isinstance( other, self.__class__ ) and

+                  not(other.parseAction) and

+                  other.resultsName is None and

+                  not other.debug ):

+                self.exprs = other.exprs[:] + [ self.exprs[1] ]

+                self.strRepr = None

+                self.mayReturnEmpty |= other.mayReturnEmpty

+                self.mayIndexError  |= other.mayIndexError

+

+            other = self.exprs[-1]

+            if ( isinstance( other, self.__class__ ) and

+                  not(other.parseAction) and

+                  other.resultsName is None and

+                  not other.debug ):

+                self.exprs = self.exprs[:-1] + other.exprs[:]

+                self.strRepr = None

+                self.mayReturnEmpty |= other.mayReturnEmpty

+                self.mayIndexError  |= other.mayIndexError

+

+        self.errmsg = "Expected " + _ustr(self)

+        

+        return self

+

+    def setResultsName( self, name, listAllMatches=False ):

+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)

+        return ret

+

+    def validate( self, validateTrace=[] ):

+        tmp = validateTrace[:]+[self]

+        for e in self.exprs:

+            e.validate(tmp)

+        self.checkRecursion( [] )

+        

+    def copy(self):

+        ret = super(ParseExpression,self).copy()

+        ret.exprs = [e.copy() for e in self.exprs]

+        return ret

+

+class And(ParseExpression):

+    """

+    Requires all given C{ParseExpression}s to be found in the given order.

+    Expressions may be separated by whitespace.

+    May be constructed using the C{'+'} operator.

+    May also be constructed using the C{'-'} operator, which will suppress backtracking.

+

+    Example::

+        integer = Word(nums)

+        name_expr = OneOrMore(Word(alphas))

+

+        expr = And([integer("id"),name_expr("name"),integer("age")])

+        # more easily written as:

+        expr = integer("id") + name_expr("name") + integer("age")

+    """

+

+    class _ErrorStop(Empty):

+        def __init__(self, *args, **kwargs):

+            super(And._ErrorStop,self).__init__(*args, **kwargs)

+            self.name = '-'

+            self.leaveWhitespace()

+

+    def __init__( self, exprs, savelist = True ):

+        super(And,self).__init__(exprs, savelist)

+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)

+        self.setWhitespaceChars( self.exprs[0].whiteChars )

+        self.skipWhitespace = self.exprs[0].skipWhitespace

+        self.callPreparse = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        # pass False as last arg to _parse for first element, since we already

+        # pre-parsed the string as part of our And pre-parsing

+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )

+        errorStop = False

+        for e in self.exprs[1:]:

+            if isinstance(e, And._ErrorStop):

+                errorStop = True

+                continue

+            if errorStop:

+                try:

+                    loc, exprtokens = e._parse( instring, loc, doActions )

+                except ParseSyntaxException:

+                    raise

+                except ParseBaseException as pe:

+                    pe.__traceback__ = None

+                    raise ParseSyntaxException._from_exception(pe)

+                except IndexError:

+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)

+            else:

+                loc, exprtokens = e._parse( instring, loc, doActions )

+            if exprtokens or exprtokens.haskeys():

+                resultlist += exprtokens

+        return loc, resultlist

+

+    def __iadd__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #And( [ self, other ] )

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+            if not e.mayReturnEmpty:

+                break

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+

+class Or(ParseExpression):

+    """

+    Requires that at least one C{ParseExpression} is found.

+    If two expressions match, the expression that matches the longest string will be used.

+    May be constructed using the C{'^'} operator.

+

+    Example::

+        # construct Or using '^' operator

+        

+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))

+        print(number.searchString("123 3.1416 789"))

+    prints::

+        [['123'], ['3.1416'], ['789']]

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(Or,self).__init__(exprs, savelist)

+        if self.exprs:

+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)

+        else:

+            self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        maxExcLoc = -1

+        maxException = None

+        matches = []

+        for e in self.exprs:

+            try:

+                loc2 = e.tryParse( instring, loc )

+            except ParseException as err:

+                err.__traceback__ = None

+                if err.loc > maxExcLoc:

+                    maxException = err

+                    maxExcLoc = err.loc

+            except IndexError:

+                if len(instring) > maxExcLoc:

+                    maxException = ParseException(instring,len(instring),e.errmsg,self)

+                    maxExcLoc = len(instring)

+            else:

+                # save match among all matches, to retry longest to shortest

+                matches.append((loc2, e))

+

+        if matches:

+            matches.sort(key=lambda x: -x[0])

+            for _,e in matches:

+                try:

+                    return e._parse( instring, loc, doActions )

+                except ParseException as err:

+                    err.__traceback__ = None

+                    if err.loc > maxExcLoc:

+                        maxException = err

+                        maxExcLoc = err.loc

+

+        if maxException is not None:

+            maxException.msg = self.errmsg

+            raise maxException

+        else:

+            raise ParseException(instring, loc, "no defined alternatives to match", self)

+

+

+    def __ixor__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #Or( [ self, other ] )

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class MatchFirst(ParseExpression):

+    """

+    Requires that at least one C{ParseExpression} is found.

+    If two expressions match, the first one listed is the one that will match.

+    May be constructed using the C{'|'} operator.

+

+    Example::

+        # construct MatchFirst using '|' operator

+        

+        # watch the order of expressions to match

+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))

+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]

+

+        # put more selective expression first

+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)

+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]

+    """

+    def __init__( self, exprs, savelist = False ):

+        super(MatchFirst,self).__init__(exprs, savelist)

+        if self.exprs:

+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)

+        else:

+            self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        maxExcLoc = -1

+        maxException = None

+        for e in self.exprs:

+            try:

+                ret = e._parse( instring, loc, doActions )

+                return ret

+            except ParseException as err:

+                if err.loc > maxExcLoc:

+                    maxException = err

+                    maxExcLoc = err.loc

+            except IndexError:

+                if len(instring) > maxExcLoc:

+                    maxException = ParseException(instring,len(instring),e.errmsg,self)

+                    maxExcLoc = len(instring)

+

+        # only got here if no expression matched, raise exception for match that made it the furthest

+        else:

+            if maxException is not None:

+                maxException.msg = self.errmsg

+                raise maxException

+            else:

+                raise ParseException(instring, loc, "no defined alternatives to match", self)

+

+    def __ior__(self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass( other )

+        return self.append( other ) #MatchFirst( [ self, other ] )

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class Each(ParseExpression):

+    """

+    Requires all given C{ParseExpression}s to be found, but in any order.

+    Expressions may be separated by whitespace.

+    May be constructed using the C{'&'} operator.

+

+    Example::

+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")

+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")

+        integer = Word(nums)

+        shape_attr = "shape:" + shape_type("shape")

+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")

+        color_attr = "color:" + color("color")

+        size_attr = "size:" + integer("size")

+

+        # use Each (using operator '&') to accept attributes in any order 

+        # (shape and posn are required, color and size are optional)

+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)

+

+        shape_spec.runTests('''

+            shape: SQUARE color: BLACK posn: 100, 120

+            shape: CIRCLE size: 50 color: BLUE posn: 50,80

+            color:GREEN size:20 shape:TRIANGLE posn:20,40

+            '''

+            )

+    prints::

+        shape: SQUARE color: BLACK posn: 100, 120

+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]

+        - color: BLACK

+        - posn: ['100', ',', '120']

+          - x: 100

+          - y: 120

+        - shape: SQUARE

+

+

+        shape: CIRCLE size: 50 color: BLUE posn: 50,80

+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]

+        - color: BLUE

+        - posn: ['50', ',', '80']

+          - x: 50

+          - y: 80

+        - shape: CIRCLE

+        - size: 50

+

+

+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40

+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]

+        - color: GREEN

+        - posn: ['20', ',', '40']

+          - x: 20

+          - y: 40

+        - shape: TRIANGLE

+        - size: 20

+    """

+    def __init__( self, exprs, savelist = True ):

+        super(Each,self).__init__(exprs, savelist)

+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)

+        self.skipWhitespace = True

+        self.initExprGroups = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.initExprGroups:

+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))

+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]

+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]

+            self.optionals = opt1 + opt2

+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]

+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]

+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]

+            self.required += self.multirequired

+            self.initExprGroups = False

+        tmpLoc = loc

+        tmpReqd = self.required[:]

+        tmpOpt  = self.optionals[:]

+        matchOrder = []

+

+        keepMatching = True

+        while keepMatching:

+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired

+            failed = []

+            for e in tmpExprs:

+                try:

+                    tmpLoc = e.tryParse( instring, tmpLoc )

+                except ParseException:

+                    failed.append(e)

+                else:

+                    matchOrder.append(self.opt1map.get(id(e),e))

+                    if e in tmpReqd:

+                        tmpReqd.remove(e)

+                    elif e in tmpOpt:

+                        tmpOpt.remove(e)

+            if len(failed) == len(tmpExprs):

+                keepMatching = False

+

+        if tmpReqd:

+            missing = ", ".join(_ustr(e) for e in tmpReqd)

+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )

+

+        # add any unmatched Optionals, in case they have default values defined

+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]

+

+        resultlist = []

+        for e in matchOrder:

+            loc,results = e._parse(instring,loc,doActions)

+            resultlist.append(results)

+

+        finalResults = sum(resultlist, ParseResults([]))

+        return loc, finalResults

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"

+

+        return self.strRepr

+

+    def checkRecursion( self, parseElementList ):

+        subRecCheckList = parseElementList[:] + [ self ]

+        for e in self.exprs:

+            e.checkRecursion( subRecCheckList )

+

+

+class ParseElementEnhance(ParserElement):

+    """

+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.

+    """

+    def __init__( self, expr, savelist=False ):

+        super(ParseElementEnhance,self).__init__(savelist)

+        if isinstance( expr, basestring ):

+            if issubclass(ParserElement._literalStringClass, Token):

+                expr = ParserElement._literalStringClass(expr)

+            else:

+                expr = ParserElement._literalStringClass(Literal(expr))

+        self.expr = expr

+        self.strRepr = None

+        if expr is not None:

+            self.mayIndexError = expr.mayIndexError

+            self.mayReturnEmpty = expr.mayReturnEmpty

+            self.setWhitespaceChars( expr.whiteChars )

+            self.skipWhitespace = expr.skipWhitespace

+            self.saveAsList = expr.saveAsList

+            self.callPreparse = expr.callPreparse

+            self.ignoreExprs.extend(expr.ignoreExprs)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.expr is not None:

+            return self.expr._parse( instring, loc, doActions, callPreParse=False )

+        else:

+            raise ParseException("",loc,self.errmsg,self)

+

+    def leaveWhitespace( self ):

+        self.skipWhitespace = False

+        self.expr = self.expr.copy()

+        if self.expr is not None:

+            self.expr.leaveWhitespace()

+        return self

+

+    def ignore( self, other ):

+        if isinstance( other, Suppress ):

+            if other not in self.ignoreExprs:

+                super( ParseElementEnhance, self).ignore( other )

+                if self.expr is not None:

+                    self.expr.ignore( self.ignoreExprs[-1] )

+        else:

+            super( ParseElementEnhance, self).ignore( other )

+            if self.expr is not None:

+                self.expr.ignore( self.ignoreExprs[-1] )

+        return self

+

+    def streamline( self ):

+        super(ParseElementEnhance,self).streamline()

+        if self.expr is not None:

+            self.expr.streamline()

+        return self

+

+    def checkRecursion( self, parseElementList ):

+        if self in parseElementList:

+            raise RecursiveGrammarException( parseElementList+[self] )

+        subRecCheckList = parseElementList[:] + [ self ]

+        if self.expr is not None:

+            self.expr.checkRecursion( subRecCheckList )

+

+    def validate( self, validateTrace=[] ):

+        tmp = validateTrace[:]+[self]

+        if self.expr is not None:

+            self.expr.validate(tmp)

+        self.checkRecursion( [] )

+

+    def __str__( self ):

+        try:

+            return super(ParseElementEnhance,self).__str__()

+        except Exception:

+            pass

+

+        if self.strRepr is None and self.expr is not None:

+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )

+        return self.strRepr

+

+

+class FollowedBy(ParseElementEnhance):

+    """

+    Lookahead matching of the given parse expression.  C{FollowedBy}

+    does I{not} advance the parsing position within the input string, it only

+    verifies that the specified parse expression matches at the current

+    position.  C{FollowedBy} always returns a null token list.

+

+    Example::

+        # use FollowedBy to match a label only if it is followed by a ':'

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        

+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()

+    prints::

+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]

+    """

+    def __init__( self, expr ):

+        super(FollowedBy,self).__init__(expr)

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        self.expr.tryParse( instring, loc )

+        return loc, []

+

+

+class NotAny(ParseElementEnhance):

+    """

+    Lookahead to disallow matching with the given parse expression.  C{NotAny}

+    does I{not} advance the parsing position within the input string, it only

+    verifies that the specified parse expression does I{not} match at the current

+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}

+    always returns a null token list.  May be constructed using the '~' operator.

+

+    Example::

+        

+    """

+    def __init__( self, expr ):

+        super(NotAny,self).__init__(expr)

+        #~ self.leaveWhitespace()

+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs

+        self.mayReturnEmpty = True

+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        if self.expr.canParseNext(instring, loc):

+            raise ParseException(instring, loc, self.errmsg, self)

+        return loc, []

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "~{" + _ustr(self.expr) + "}"

+

+        return self.strRepr

+

+class _MultipleMatch(ParseElementEnhance):

+    def __init__( self, expr, stopOn=None):

+        super(_MultipleMatch, self).__init__(expr)

+        self.saveAsList = True

+        ender = stopOn

+        if isinstance(ender, basestring):

+            ender = ParserElement._literalStringClass(ender)

+        self.not_ender = ~ender if ender is not None else None

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        self_expr_parse = self.expr._parse

+        self_skip_ignorables = self._skipIgnorables

+        check_ender = self.not_ender is not None

+        if check_ender:

+            try_not_ender = self.not_ender.tryParse

+        

+        # must be at least one (but first see if we are the stopOn sentinel;

+        # if so, fail)

+        if check_ender:

+            try_not_ender(instring, loc)

+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )

+        try:

+            hasIgnoreExprs = (not not self.ignoreExprs)

+            while 1:

+                if check_ender:

+                    try_not_ender(instring, loc)

+                if hasIgnoreExprs:

+                    preloc = self_skip_ignorables( instring, loc )

+                else:

+                    preloc = loc

+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )

+                if tmptokens or tmptokens.haskeys():

+                    tokens += tmptokens

+        except (ParseException,IndexError):

+            pass

+

+        return loc, tokens

+        

+class OneOrMore(_MultipleMatch):

+    """

+    Repetition of one or more of the given expression.

+    

+    Parameters:

+     - expr - expression that must match one or more times

+     - stopOn - (default=C{None}) - expression for a terminating sentinel

+          (only required if the sentinel would ordinarily match the repetition 

+          expression)          

+

+    Example::

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))

+

+        text = "shape: SQUARE posn: upper left color: BLACK"

+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]

+

+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]

+        

+        # could also be written as

+        (attr_expr * (1,)).parseString(text).pprint()

+    """

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "{" + _ustr(self.expr) + "}..."

+

+        return self.strRepr

+

+class ZeroOrMore(_MultipleMatch):

+    """

+    Optional repetition of zero or more of the given expression.

+    

+    Parameters:

+     - expr - expression that must match zero or more times

+     - stopOn - (default=C{None}) - expression for a terminating sentinel

+          (only required if the sentinel would ordinarily match the repetition 

+          expression)          

+

+    Example: similar to L{OneOrMore}

+    """

+    def __init__( self, expr, stopOn=None):

+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)

+        self.mayReturnEmpty = True

+        

+    def parseImpl( self, instring, loc, doActions=True ):

+        try:

+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)

+        except (ParseException,IndexError):

+            return loc, []

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "[" + _ustr(self.expr) + "]..."

+

+        return self.strRepr

+

+class _NullToken(object):

+    def __bool__(self):

+        return False

+    __nonzero__ = __bool__

+    def __str__(self):

+        return ""

+

+_optionalNotMatched = _NullToken()

+class Optional(ParseElementEnhance):

+    """

+    Optional matching of the given expression.

+

+    Parameters:

+     - expr - expression that must match zero or more times

+     - default (optional) - value to be returned if the optional expression is not found.

+

+    Example::

+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier

+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))

+        zip.runTests('''

+            # traditional ZIP code

+            12345

+            

+            # ZIP+4 form

+            12101-0001

+            

+            # invalid ZIP

+            98765-

+            ''')

+    prints::

+        # traditional ZIP code

+        12345

+        ['12345']

+

+        # ZIP+4 form

+        12101-0001

+        ['12101-0001']

+

+        # invalid ZIP

+        98765-

+             ^

+        FAIL: Expected end of text (at char 5), (line:1, col:6)

+    """

+    def __init__( self, expr, default=_optionalNotMatched ):

+        super(Optional,self).__init__( expr, savelist=False )

+        self.saveAsList = self.expr.saveAsList

+        self.defaultValue = default

+        self.mayReturnEmpty = True

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        try:

+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )

+        except (ParseException,IndexError):

+            if self.defaultValue is not _optionalNotMatched:

+                if self.expr.resultsName:

+                    tokens = ParseResults([ self.defaultValue ])

+                    tokens[self.expr.resultsName] = self.defaultValue

+                else:

+                    tokens = [ self.defaultValue ]

+            else:

+                tokens = []

+        return loc, tokens

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+

+        if self.strRepr is None:

+            self.strRepr = "[" + _ustr(self.expr) + "]"

+

+        return self.strRepr

+

+class SkipTo(ParseElementEnhance):

+    """

+    Token for skipping over all undefined text until the matched expression is found.

+

+    Parameters:

+     - expr - target expression marking the end of the data to be skipped

+     - include - (default=C{False}) if True, the target expression is also parsed 

+          (the skipped text and target expression are returned as a 2-element list).

+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 

+          comments) that might contain false matches to the target expression

+     - failOn - (default=C{None}) define expressions that are not allowed to be 

+          included in the skipped test; if found before the target expression is found, 

+          the SkipTo is not a match

+

+    Example::

+        report = '''

+            Outstanding Issues Report - 1 Jan 2000

+

+               # | Severity | Description                               |  Days Open

+            -----+----------+-------------------------------------------+-----------

+             101 | Critical | Intermittent system crash                 |          6

+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14

+              79 | Minor    | System slow when running too many reports |         47

+            '''

+        integer = Word(nums)

+        SEP = Suppress('|')

+        # use SkipTo to simply match everything up until the next SEP

+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match

+        # - parse action will call token.strip() for each matched token, i.e., the description body

+        string_data = SkipTo(SEP, ignore=quotedString)

+        string_data.setParseAction(tokenMap(str.strip))

+        ticket_expr = (integer("issue_num") + SEP 

+                      + string_data("sev") + SEP 

+                      + string_data("desc") + SEP 

+                      + integer("days_open"))

+        

+        for tkt in ticket_expr.searchString(report):

+            print tkt.dump()

+    prints::

+        ['101', 'Critical', 'Intermittent system crash', '6']

+        - days_open: 6

+        - desc: Intermittent system crash

+        - issue_num: 101

+        - sev: Critical

+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']

+        - days_open: 14

+        - desc: Spelling error on Login ('log|n')

+        - issue_num: 94

+        - sev: Cosmetic

+        ['79', 'Minor', 'System slow when running too many reports', '47']

+        - days_open: 47

+        - desc: System slow when running too many reports

+        - issue_num: 79

+        - sev: Minor

+    """

+    def __init__( self, other, include=False, ignore=None, failOn=None ):

+        super( SkipTo, self ).__init__( other )

+        self.ignoreExpr = ignore

+        self.mayReturnEmpty = True

+        self.mayIndexError = False

+        self.includeMatch = include

+        self.asList = False

+        if isinstance(failOn, basestring):

+            self.failOn = ParserElement._literalStringClass(failOn)

+        else:

+            self.failOn = failOn

+        self.errmsg = "No match found for "+_ustr(self.expr)

+

+    def parseImpl( self, instring, loc, doActions=True ):

+        startloc = loc

+        instrlen = len(instring)

+        expr = self.expr

+        expr_parse = self.expr._parse

+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None

+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None

+        

+        tmploc = loc

+        while tmploc <= instrlen:

+            if self_failOn_canParseNext is not None:

+                # break if failOn expression matches

+                if self_failOn_canParseNext(instring, tmploc):

+                    break

+                    

+            if self_ignoreExpr_tryParse is not None:

+                # advance past ignore expressions

+                while 1:

+                    try:

+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)

+                    except ParseBaseException:

+                        break

+            

+            try:

+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)

+            except (ParseException, IndexError):

+                # no match, advance loc in string

+                tmploc += 1

+            else:

+                # matched skipto expr, done

+                break

+

+        else:

+            # ran off the end of the input string without matching skipto expr, fail

+            raise ParseException(instring, loc, self.errmsg, self)

+

+        # build up return values

+        loc = tmploc

+        skiptext = instring[startloc:loc]

+        skipresult = ParseResults(skiptext)

+        

+        if self.includeMatch:

+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)

+            skipresult += mat

+

+        return loc, skipresult

+

+class Forward(ParseElementEnhance):

+    """

+    Forward declaration of an expression to be defined later -

+    used for recursive grammars, such as algebraic infix notation.

+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.

+

+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.

+    Specifically, '|' has a lower precedence than '<<', so that::

+        fwdExpr << a | b | c

+    will actually be evaluated as::

+        (fwdExpr << a) | b | c

+    thereby leaving b and c out as parseable alternatives.  It is recommended that you

+    explicitly group the values inserted into the C{Forward}::

+        fwdExpr << (a | b | c)

+    Converting to use the '<<=' operator instead will avoid this problem.

+

+    See L{ParseResults.pprint} for an example of a recursive parser created using

+    C{Forward}.

+    """

+    def __init__( self, other=None ):

+        super(Forward,self).__init__( other, savelist=False )

+

+    def __lshift__( self, other ):

+        if isinstance( other, basestring ):

+            other = ParserElement._literalStringClass(other)

+        self.expr = other

+        self.strRepr = None

+        self.mayIndexError = self.expr.mayIndexError

+        self.mayReturnEmpty = self.expr.mayReturnEmpty

+        self.setWhitespaceChars( self.expr.whiteChars )

+        self.skipWhitespace = self.expr.skipWhitespace

+        self.saveAsList = self.expr.saveAsList

+        self.ignoreExprs.extend(self.expr.ignoreExprs)

+        return self

+        

+    def __ilshift__(self, other):

+        return self << other

+    

+    def leaveWhitespace( self ):

+        self.skipWhitespace = False

+        return self

+

+    def streamline( self ):

+        if not self.streamlined:

+            self.streamlined = True

+            if self.expr is not None:

+                self.expr.streamline()

+        return self

+

+    def validate( self, validateTrace=[] ):

+        if self not in validateTrace:

+            tmp = validateTrace[:]+[self]

+            if self.expr is not None:

+                self.expr.validate(tmp)

+        self.checkRecursion([])

+

+    def __str__( self ):

+        if hasattr(self,"name"):

+            return self.name

+        return self.__class__.__name__ + ": ..."

+

+        # stubbed out for now - creates awful memory and perf issues

+        self._revertClass = self.__class__

+        self.__class__ = _ForwardNoRecurse

+        try:

+            if self.expr is not None:

+                retString = _ustr(self.expr)

+            else:

+                retString = "None"

+        finally:

+            self.__class__ = self._revertClass

+        return self.__class__.__name__ + ": " + retString

+

+    def copy(self):

+        if self.expr is not None:

+            return super(Forward,self).copy()

+        else:

+            ret = Forward()

+            ret <<= self

+            return ret

+

+class _ForwardNoRecurse(Forward):

+    def __str__( self ):

+        return "..."

+

+class TokenConverter(ParseElementEnhance):

+    """

+    Abstract subclass of C{ParseExpression}, for converting parsed results.

+    """

+    def __init__( self, expr, savelist=False ):

+        super(TokenConverter,self).__init__( expr )#, savelist )

+        self.saveAsList = False

+

+class Combine(TokenConverter):

+    """

+    Converter to concatenate all matching tokens to a single string.

+    By default, the matching patterns must also be contiguous in the input string;

+    this can be disabled by specifying C{'adjacent=False'} in the constructor.

+

+    Example::

+        real = Word(nums) + '.' + Word(nums)

+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']

+        # will also erroneously match the following

+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']

+

+        real = Combine(Word(nums) + '.' + Word(nums))

+        print(real.parseString('3.1416')) # -> ['3.1416']

+        # no match when there are internal spaces

+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)

+    """

+    def __init__( self, expr, joinString="", adjacent=True ):

+        super(Combine,self).__init__( expr )

+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself

+        if adjacent:

+            self.leaveWhitespace()

+        self.adjacent = adjacent

+        self.skipWhitespace = True

+        self.joinString = joinString

+        self.callPreparse = True

+

+    def ignore( self, other ):

+        if self.adjacent:

+            ParserElement.ignore(self, other)

+        else:

+            super( Combine, self).ignore( other )

+        return self

+

+    def postParse( self, instring, loc, tokenlist ):

+        retToks = tokenlist.copy()

+        del retToks[:]

+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)

+

+        if self.resultsName and retToks.haskeys():

+            return [ retToks ]

+        else:

+            return retToks

+

+class Group(TokenConverter):

+    """

+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.

+

+    Example::

+        ident = Word(alphas)

+        num = Word(nums)

+        term = ident | num

+        func = ident + Optional(delimitedList(term))

+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']

+

+        func = ident + Group(Optional(delimitedList(term)))

+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]

+    """

+    def __init__( self, expr ):

+        super(Group,self).__init__( expr )

+        self.saveAsList = True

+

+    def postParse( self, instring, loc, tokenlist ):

+        return [ tokenlist ]

+

+class Dict(TokenConverter):

+    """

+    Converter to return a repetitive expression as a list, but also as a dictionary.

+    Each element can also be referenced using the first token in the expression as its key.

+    Useful for tabular report scraping when the first column can be used as a item key.

+

+    Example::

+        data_word = Word(alphas)

+        label = data_word + FollowedBy(':')

+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))

+

+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"

+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        

+        # print attributes as plain groups

+        print(OneOrMore(attr_expr).parseString(text).dump())

+        

+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names

+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)

+        print(result.dump())

+        

+        # access named fields as dict entries, or output as dict

+        print(result['shape'])        

+        print(result.asDict())

+    prints::

+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']

+

+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]

+        - color: light blue

+        - posn: upper left

+        - shape: SQUARE

+        - texture: burlap

+        SQUARE

+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}

+    See more examples at L{ParseResults} of accessing fields by results name.

+    """

+    def __init__( self, expr ):

+        super(Dict,self).__init__( expr )

+        self.saveAsList = True

+

+    def postParse( self, instring, loc, tokenlist ):

+        for i,tok in enumerate(tokenlist):

+            if len(tok) == 0:

+                continue

+            ikey = tok[0]

+            if isinstance(ikey,int):

+                ikey = _ustr(tok[0]).strip()

+            if len(tok)==1:

+                tokenlist[ikey] = _ParseResultsWithOffset("",i)

+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):

+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)

+            else:

+                dictvalue = tok.copy() #ParseResults(i)

+                del dictvalue[0]

+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):

+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)

+                else:

+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)

+

+        if self.resultsName:

+            return [ tokenlist ]

+        else:

+            return tokenlist

+

+

+class Suppress(TokenConverter):

+    """

+    Converter for ignoring the results of a parsed expression.

+

+    Example::

+        source = "a, b, c,d"

+        wd = Word(alphas)

+        wd_list1 = wd + ZeroOrMore(',' + wd)

+        print(wd_list1.parseString(source))

+

+        # often, delimiters that are useful during parsing are just in the

+        # way afterward - use Suppress to keep them out of the parsed output

+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)

+        print(wd_list2.parseString(source))

+    prints::

+        ['a', ',', 'b', ',', 'c', ',', 'd']

+        ['a', 'b', 'c', 'd']

+    (See also L{delimitedList}.)

+    """

+    def postParse( self, instring, loc, tokenlist ):

+        return []

+

+    def suppress( self ):

+        return self

+

+

+class OnlyOnce(object):

+    """

+    Wrapper for parse actions, to ensure they are only called once.

+    """

+    def __init__(self, methodCall):

+        self.callable = _trim_arity(methodCall)

+        self.called = False

+    def __call__(self,s,l,t):

+        if not self.called:

+            results = self.callable(s,l,t)

+            self.called = True

+            return results

+        raise ParseException(s,l,"")

+    def reset(self):

+        self.called = False

+

+def traceParseAction(f):

+    """

+    Decorator for debugging parse actions. 

+    

+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}

+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.

+

+    Example::

+        wd = Word(alphas)

+

+        @traceParseAction

+        def remove_duplicate_chars(tokens):

+            return ''.join(sorted(set(''.join(tokens))))

+

+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)

+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))

+    prints::

+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))

+        <<leaving remove_duplicate_chars (ret: 'dfjkls')

+        ['dfjkls']

+    """

+    f = _trim_arity(f)

+    def z(*paArgs):

+        thisFunc = f.__name__

+        s,l,t = paArgs[-3:]

+        if len(paArgs)>3:

+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc

+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )

+        try:

+            ret = f(*paArgs)

+        except Exception as exc:

+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )

+            raise

+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )

+        return ret

+    try:

+        z.__name__ = f.__name__

+    except AttributeError:

+        pass

+    return z

+

+#

+# global helpers

+#

+def delimitedList( expr, delim=",", combine=False ):

+    """

+    Helper to define a delimited list of expressions - the delimiter defaults to ','.

+    By default, the list elements and delimiters can have intervening whitespace, and

+    comments, but this can be overridden by passing C{combine=True} in the constructor.

+    If C{combine} is set to C{True}, the matching tokens are returned as a single token

+    string, with the delimiters included; otherwise, the matching tokens are returned

+    as a list of tokens, with the delimiters suppressed.

+

+    Example::

+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']

+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']

+    """

+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."

+    if combine:

+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)

+    else:

+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)

+

+def countedArray( expr, intExpr=None ):

+    """

+    Helper to define a counted list of expressions.

+    This helper defines a pattern of the form::

+        integer expr expr expr...

+    where the leading integer tells how many expr expressions follow.

+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.

+    

+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.

+

+    Example::

+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']

+

+        # in this parser, the leading integer value is given in binary,

+        # '10' indicating that 2 values are in the array

+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))

+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']

+    """

+    arrayExpr = Forward()

+    def countFieldParseAction(s,l,t):

+        n = t[0]

+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))

+        return []

+    if intExpr is None:

+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))

+    else:

+        intExpr = intExpr.copy()

+    intExpr.setName("arrayLen")

+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)

+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')

+

+def _flatten(L):

+    ret = []

+    for i in L:

+        if isinstance(i,list):

+            ret.extend(_flatten(i))

+        else:

+            ret.append(i)

+    return ret

+

+def matchPreviousLiteral(expr):

+    """

+    Helper to define an expression that is indirectly defined from

+    the tokens matched in a previous expression, that is, it looks

+    for a 'repeat' of a previous expression.  For example::

+        first = Word(nums)

+        second = matchPreviousLiteral(first)

+        matchExpr = first + ":" + second

+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a

+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.

+    If this is not desired, use C{matchPreviousExpr}.

+    Do I{not} use with packrat parsing enabled.

+    """

+    rep = Forward()

+    def copyTokenToRepeater(s,l,t):

+        if t:

+            if len(t) == 1:

+                rep << t[0]

+            else:

+                # flatten t tokens

+                tflat = _flatten(t.asList())

+                rep << And(Literal(tt) for tt in tflat)

+        else:

+            rep << Empty()

+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)

+    rep.setName('(prev) ' + _ustr(expr))

+    return rep

+

+def matchPreviousExpr(expr):

+    """

+    Helper to define an expression that is indirectly defined from

+    the tokens matched in a previous expression, that is, it looks

+    for a 'repeat' of a previous expression.  For example::

+        first = Word(nums)

+        second = matchPreviousExpr(first)

+        matchExpr = first + ":" + second

+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by

+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};

+    the expressions are evaluated first, and then compared, so

+    C{"1"} is compared with C{"10"}.

+    Do I{not} use with packrat parsing enabled.

+    """

+    rep = Forward()

+    e2 = expr.copy()

+    rep <<= e2

+    def copyTokenToRepeater(s,l,t):

+        matchTokens = _flatten(t.asList())

+        def mustMatchTheseTokens(s,l,t):

+            theseTokens = _flatten(t.asList())

+            if  theseTokens != matchTokens:

+                raise ParseException("",0,"")

+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )

+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)

+    rep.setName('(prev) ' + _ustr(expr))

+    return rep

+

+def _escapeRegexRangeChars(s):

+    #~  escape these chars: ^-]

+    for c in r"\^-]":

+        s = s.replace(c,_bslash+c)

+    s = s.replace("\n",r"\n")

+    s = s.replace("\t",r"\t")

+    return _ustr(s)

+

+def oneOf( strs, caseless=False, useRegex=True ):

+    """

+    Helper to quickly define a set of alternative Literals, and makes sure to do

+    longest-first testing when there is a conflict, regardless of the input order,

+    but returns a C{L{MatchFirst}} for best performance.

+

+    Parameters:

+     - strs - a string of space-delimited literals, or a collection of string literals

+     - caseless - (default=C{False}) - treat all literals as caseless

+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex

+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or

+          if creating a C{Regex} raises an exception)

+

+    Example::

+        comp_oper = oneOf("< = > <= >= !=")

+        var = Word(alphas)

+        number = Word(nums)

+        term = var | number

+        comparison_expr = term + comp_oper + term

+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))

+    prints::

+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]

+    """

+    if caseless:

+        isequal = ( lambda a,b: a.upper() == b.upper() )

+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )

+        parseElementClass = CaselessLiteral

+    else:

+        isequal = ( lambda a,b: a == b )

+        masks = ( lambda a,b: b.startswith(a) )

+        parseElementClass = Literal

+

+    symbols = []

+    if isinstance(strs,basestring):

+        symbols = strs.split()

+    elif isinstance(strs, Iterable):

+        symbols = list(strs)

+    else:

+        warnings.warn("Invalid argument to oneOf, expected string or iterable",

+                SyntaxWarning, stacklevel=2)

+    if not symbols:

+        return NoMatch()

+

+    i = 0

+    while i < len(symbols)-1:

+        cur = symbols[i]

+        for j,other in enumerate(symbols[i+1:]):

+            if ( isequal(other, cur) ):

+                del symbols[i+j+1]

+                break

+            elif ( masks(cur, other) ):

+                del symbols[i+j+1]

+                symbols.insert(i,other)

+                cur = other

+                break

+        else:

+            i += 1

+

+    if not caseless and useRegex:

+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))

+        try:

+            if len(symbols)==len("".join(symbols)):

+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))

+            else:

+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))

+        except Exception:

+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",

+                    SyntaxWarning, stacklevel=2)

+

+

+    # last resort, just use MatchFirst

+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))

+

+def dictOf( key, value ):

+    """

+    Helper to easily and clearly define a dictionary by specifying the respective patterns

+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens

+    in the proper order.  The key pattern can include delimiting markers or punctuation,

+    as long as they are suppressed, thereby leaving the significant key text.  The value

+    pattern can include named results, so that the C{Dict} results can include named token

+    fields.

+

+    Example::

+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"

+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))

+        print(OneOrMore(attr_expr).parseString(text).dump())

+        

+        attr_label = label

+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)

+

+        # similar to Dict, but simpler call format

+        result = dictOf(attr_label, attr_value).parseString(text)

+        print(result.dump())

+        print(result['shape'])

+        print(result.shape)  # object attribute access works too

+        print(result.asDict())

+    prints::

+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]

+        - color: light blue

+        - posn: upper left

+        - shape: SQUARE

+        - texture: burlap

+        SQUARE

+        SQUARE

+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}

+    """

+    return Dict( ZeroOrMore( Group ( key + value ) ) )

+

+def originalTextFor(expr, asString=True):

+    """

+    Helper to return the original, untokenized text for a given expression.  Useful to

+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to

+    revert separate tokens with intervening whitespace back to the original matching

+    input text. By default, returns astring containing the original parsed text.  

+       

+    If the optional C{asString} argument is passed as C{False}, then the return value is a 

+    C{L{ParseResults}} containing any results names that were originally matched, and a 

+    single token containing the original matched text from the input string.  So if 

+    the expression passed to C{L{originalTextFor}} contains expressions with defined

+    results names, you must set C{asString} to C{False} if you want to preserve those

+    results name values.

+

+    Example::

+        src = "this is test <b> bold <i>text</i> </b> normal text "

+        for tag in ("b","i"):

+            opener,closer = makeHTMLTags(tag)

+            patt = originalTextFor(opener + SkipTo(closer) + closer)

+            print(patt.searchString(src)[0])

+    prints::

+        ['<b> bold <i>text</i> </b>']

+        ['<i>text</i>']

+    """

+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)

+    endlocMarker = locMarker.copy()

+    endlocMarker.callPreparse = False

+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")

+    if asString:

+        extractText = lambda s,l,t: s[t._original_start:t._original_end]

+    else:

+        def extractText(s,l,t):

+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]

+    matchExpr.setParseAction(extractText)

+    matchExpr.ignoreExprs = expr.ignoreExprs

+    return matchExpr

+

+def ungroup(expr): 

+    """

+    Helper to undo pyparsing's default grouping of And expressions, even

+    if all but one are non-empty.

+    """

+    return TokenConverter(expr).setParseAction(lambda t:t[0])

+

+def locatedExpr(expr):

+    """

+    Helper to decorate a returned token with its starting and ending locations in the input string.

+    This helper adds the following results names:

+     - locn_start = location where matched expression begins

+     - locn_end = location where matched expression ends

+     - value = the actual parsed results

+

+    Be careful if the input text contains C{<TAB>} characters, you may want to call

+    C{L{ParserElement.parseWithTabs}}

+

+    Example::

+        wd = Word(alphas)

+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):

+            print(match)

+    prints::

+        [[0, 'ljsdf', 5]]

+        [[8, 'lksdjjf', 15]]

+        [[18, 'lkkjj', 23]]

+    """

+    locator = Empty().setParseAction(lambda s,l,t: l)

+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))

+

+

+# convenience constants for positional expressions

+empty       = Empty().setName("empty")

+lineStart   = LineStart().setName("lineStart")

+lineEnd     = LineEnd().setName("lineEnd")

+stringStart = StringStart().setName("stringStart")

+stringEnd   = StringEnd().setName("stringEnd")

+

+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])

+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))

+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))

+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)

+_charRange = Group(_singleChar + Suppress("-") + _singleChar)

+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"

+

+def srange(s):

+    r"""

+    Helper to easily define string ranges for use in Word construction.  Borrows

+    syntax from regexp '[]' string range definitions::

+        srange("[0-9]")   -> "0123456789"

+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"

+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"

+    The input string must be enclosed in []'s, and the returned string is the expanded

+    character set joined into a single string.

+    The values enclosed in the []'s may be:

+     - a single character

+     - an escaped character with a leading backslash (such as C{\-} or C{\]})

+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 

+         (C{\0x##} is also supported for backwards compatibility) 

+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)

+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)

+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)

+    """

+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))

+    try:

+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)

+    except Exception:

+        return ""

+

+def matchOnlyAtCol(n):

+    """

+    Helper method for defining parse actions that require matching at a specific

+    column in the input text.

+    """

+    def verifyCol(strg,locn,toks):

+        if col(locn,strg) != n:

+            raise ParseException(strg,locn,"matched token not at column %d" % n)

+    return verifyCol

+

+def replaceWith(replStr):

+    """

+    Helper method for common parse actions that simply return a literal value.  Especially

+    useful when used with C{L{transformString<ParserElement.transformString>}()}.

+

+    Example::

+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))

+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))

+        term = na | num

+        

+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]

+    """

+    return lambda s,l,t: [replStr]

+

+def removeQuotes(s,l,t):

+    """

+    Helper parse action for removing quotation marks from parsed quoted strings.

+

+    Example::

+        # by default, quotation marks are included in parsed results

+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]

+

+        # use removeQuotes to strip quotation marks from parsed results

+        quotedString.setParseAction(removeQuotes)

+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]

+    """

+    return t[0][1:-1]

+

+def tokenMap(func, *args):

+    """

+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 

+    args are passed, they are forwarded to the given function as additional arguments after

+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the

+    parsed data to an integer using base 16.

+

+    Example (compare the last to example in L{ParserElement.transformString}::

+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))

+        hex_ints.runTests('''

+            00 11 22 aa FF 0a 0d 1a

+            ''')

+        

+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))

+        OneOrMore(upperword).runTests('''

+            my kingdom for a horse

+            ''')

+

+        wd = Word(alphas).setParseAction(tokenMap(str.title))

+        OneOrMore(wd).setParseAction(' '.join).runTests('''

+            now is the winter of our discontent made glorious summer by this sun of york

+            ''')

+    prints::

+        00 11 22 aa FF 0a 0d 1a

+        [0, 17, 34, 170, 255, 10, 13, 26]

+

+        my kingdom for a horse

+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']

+

+        now is the winter of our discontent made glorious summer by this sun of york

+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']

+    """

+    def pa(s,l,t):

+        return [func(tokn, *args) for tokn in t]

+

+    try:

+        func_name = getattr(func, '__name__', 

+                            getattr(func, '__class__').__name__)

+    except Exception:

+        func_name = str(func)

+    pa.__name__ = func_name

+

+    return pa

+

+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())

+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""

+

+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())

+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""

+    

+def _makeTags(tagStr, xml):

+    """Internal helper to construct opening and closing tag expressions, given a tag name"""

+    if isinstance(tagStr,basestring):

+        resname = tagStr

+        tagStr = Keyword(tagStr, caseless=not xml)

+    else:

+        resname = tagStr.name

+

+    tagAttrName = Word(alphas,alphanums+"_-:")

+    if (xml):

+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )

+        openTag = Suppress("<") + tagStr("tag") + \

+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \

+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")

+    else:

+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")

+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)

+        openTag = Suppress("<") + tagStr("tag") + \

+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \

+                Optional( Suppress("=") + tagAttrValue ) ))) + \

+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")

+    closeTag = Combine(_L("</") + tagStr + ">")

+

+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)

+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)

+    openTag.tag = resname

+    closeTag.tag = resname

+    return openTag, closeTag

+

+def makeHTMLTags(tagStr):

+    """

+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches

+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.

+

+    Example::

+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'

+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple

+        a,a_end = makeHTMLTags("A")

+        link_expr = a + SkipTo(a_end)("link_text") + a_end

+        

+        for link in link_expr.searchString(text):

+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results

+            print(link.link_text, '->', link.href)

+    prints::

+        pyparsing -> http://pyparsing.wikispaces.com

+    """

+    return _makeTags( tagStr, False )

+

+def makeXMLTags(tagStr):

+    """

+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches

+    tags only in the given upper/lower case.

+

+    Example: similar to L{makeHTMLTags}

+    """

+    return _makeTags( tagStr, True )

+

+def withAttribute(*args,**attrDict):

+    """

+    Helper to create a validating parse action to be used with start tags created

+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag

+    with a required attribute value, to avoid false matches on common tags such as

+    C{<TD>} or C{<DIV>}.

+

+    Call C{withAttribute} with a series of attribute names and values. Specify the list

+    of filter attributes names and values as:

+     - keyword arguments, as in C{(align="right")}, or

+     - as an explicit dict with C{**} operator, when an attribute name is also a Python

+          reserved word, as in C{**{"class":"Customer", "align":"right"}}

+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )

+    For attribute names with a namespace prefix, you must use the second form.  Attribute

+    names are matched insensitive to upper/lower case.

+       

+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.

+

+    To verify that the attribute exists, but without specifying a value, pass

+    C{withAttribute.ANY_VALUE} as the value.

+

+    Example::

+        html = '''

+            <div>

+            Some text

+            <div type="grid">1 4 0 1 0</div>

+            <div type="graph">1,3 2,3 1,1</div>

+            <div>this has no type</div>

+            </div>

+                

+        '''

+        div,div_end = makeHTMLTags("div")

+

+        # only match div tag having a type attribute with value "grid"

+        div_grid = div().setParseAction(withAttribute(type="grid"))

+        grid_expr = div_grid + SkipTo(div | div_end)("body")

+        for grid_header in grid_expr.searchString(html):

+            print(grid_header.body)

+        

+        # construct a match with any div tag having a type attribute, regardless of the value

+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))

+        div_expr = div_any_type + SkipTo(div | div_end)("body")

+        for div_header in div_expr.searchString(html):

+            print(div_header.body)

+    prints::

+        1 4 0 1 0

+

+        1 4 0 1 0

+        1,3 2,3 1,1

+    """

+    if args:

+        attrs = args[:]

+    else:

+        attrs = attrDict.items()

+    attrs = [(k,v) for k,v in attrs]

+    def pa(s,l,tokens):

+        for attrName,attrValue in attrs:

+            if attrName not in tokens:

+                raise ParseException(s,l,"no matching attribute " + attrName)

+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:

+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %

+                                            (attrName, tokens[attrName], attrValue))

+    return pa

+withAttribute.ANY_VALUE = object()

+

+def withClass(classname, namespace=''):

+    """

+    Simplified version of C{L{withAttribute}} when matching on a div class - made

+    difficult because C{class} is a reserved word in Python.

+

+    Example::

+        html = '''

+            <div>

+            Some text

+            <div class="grid">1 4 0 1 0</div>

+            <div class="graph">1,3 2,3 1,1</div>

+            <div>this &lt;div&gt; has no class</div>

+            </div>

+                

+        '''

+        div,div_end = makeHTMLTags("div")

+        div_grid = div().setParseAction(withClass("grid"))

+        

+        grid_expr = div_grid + SkipTo(div | div_end)("body")

+        for grid_header in grid_expr.searchString(html):

+            print(grid_header.body)

+        

+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))

+        div_expr = div_any_type + SkipTo(div | div_end)("body")

+        for div_header in div_expr.searchString(html):

+            print(div_header.body)

+    prints::

+        1 4 0 1 0

+

+        1 4 0 1 0

+        1,3 2,3 1,1

+    """

+    classattr = "%s:class" % namespace if namespace else "class"

+    return withAttribute(**{classattr : classname})        

+

+opAssoc = _Constants()

+opAssoc.LEFT = object()

+opAssoc.RIGHT = object()

+

+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):

+    """

+    Helper method for constructing grammars of expressions made up of

+    operators working in a precedence hierarchy.  Operators may be unary or

+    binary, left- or right-associative.  Parse actions can also be attached

+    to operator expressions. The generated parser will also recognize the use 

+    of parentheses to override operator precedences (see example below).

+    

+    Note: if you define a deep operator list, you may see performance issues

+    when using infixNotation. See L{ParserElement.enablePackrat} for a

+    mechanism to potentially improve your parser performance.

+

+    Parameters:

+     - baseExpr - expression representing the most basic element for the nested

+     - opList - list of tuples, one for each operator precedence level in the

+      expression grammar; each tuple is of the form

+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:

+       - opExpr is the pyparsing expression for the operator;

+          may also be a string, which will be converted to a Literal;

+          if numTerms is 3, opExpr is a tuple of two expressions, for the

+          two operators separating the 3 terms

+       - numTerms is the number of terms for this operator (must

+          be 1, 2, or 3)

+       - rightLeftAssoc is the indicator whether the operator is

+          right or left associative, using the pyparsing-defined

+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.

+       - parseAction is the parse action to be associated with

+          expressions matching this operator expression (the

+          parse action tuple member may be omitted); if the parse action

+          is passed a tuple or list of functions, this is equivalent to

+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})

+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})

+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})

+

+    Example::

+        # simple example of four-function arithmetic with ints and variable names

+        integer = pyparsing_common.signed_integer

+        varname = pyparsing_common.identifier 

+        

+        arith_expr = infixNotation(integer | varname,

+            [

+            ('-', 1, opAssoc.RIGHT),

+            (oneOf('* /'), 2, opAssoc.LEFT),

+            (oneOf('+ -'), 2, opAssoc.LEFT),

+            ])

+        

+        arith_expr.runTests('''

+            5+3*6

+            (5+3)*6

+            -2--11

+            ''', fullDump=False)

+    prints::

+        5+3*6

+        [[5, '+', [3, '*', 6]]]

+

+        (5+3)*6

+        [[[5, '+', 3], '*', 6]]

+

+        -2--11

+        [[['-', 2], '-', ['-', 11]]]

+    """

+    ret = Forward()

+    lastExpr = baseExpr | ( lpar + ret + rpar )

+    for i,operDef in enumerate(opList):

+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]

+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr

+        if arity == 3:

+            if opExpr is None or len(opExpr) != 2:

+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")

+            opExpr1, opExpr2 = opExpr

+        thisExpr = Forward().setName(termName)

+        if rightLeftAssoc == opAssoc.LEFT:

+            if arity == 1:

+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )

+            elif arity == 2:

+                if opExpr is not None:

+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )

+                else:

+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )

+            elif arity == 3:

+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \

+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )

+            else:

+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")

+        elif rightLeftAssoc == opAssoc.RIGHT:

+            if arity == 1:

+                # try to avoid LR with this extra test

+                if not isinstance(opExpr, Optional):

+                    opExpr = Optional(opExpr)

+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )

+            elif arity == 2:

+                if opExpr is not None:

+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )

+                else:

+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )

+            elif arity == 3:

+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \

+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )

+            else:

+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")

+        else:

+            raise ValueError("operator must indicate right or left associativity")

+        if pa:

+            if isinstance(pa, (tuple, list)):

+                matchExpr.setParseAction(*pa)

+            else:

+                matchExpr.setParseAction(pa)

+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )

+        lastExpr = thisExpr

+    ret <<= lastExpr

+    return ret

+

+operatorPrecedence = infixNotation

+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""

+

+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")

+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")

+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|

+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")

+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")

+

+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):

+    """

+    Helper method for defining nested lists enclosed in opening and closing

+    delimiters ("(" and ")" are the default).

+

+    Parameters:

+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression

+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression

+     - content - expression for items within the nested lists (default=C{None})

+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})

+

+    If an expression is not provided for the content argument, the nested

+    expression will capture all whitespace-delimited content between delimiters

+    as a list of separate values.

+

+    Use the C{ignoreExpr} argument to define expressions that may contain

+    opening or closing characters that should not be treated as opening

+    or closing characters for nesting, such as quotedString or a comment

+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.

+    The default is L{quotedString}, but if no expressions are to be ignored,

+    then pass C{None} for this argument.

+

+    Example::

+        data_type = oneOf("void int short long char float double")

+        decl_data_type = Combine(data_type + Optional(Word('*')))

+        ident = Word(alphas+'_', alphanums+'_')

+        number = pyparsing_common.number

+        arg = Group(decl_data_type + ident)

+        LPAR,RPAR = map(Suppress, "()")

+

+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))

+

+        c_function = (decl_data_type("type") 

+                      + ident("name")

+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 

+                      + code_body("body"))

+        c_function.ignore(cStyleComment)

+        

+        source_code = '''

+            int is_odd(int x) { 

+                return (x%2); 

+            }

+                

+            int dec_to_hex(char hchar) { 

+                if (hchar >= '0' && hchar <= '9') { 

+                    return (ord(hchar)-ord('0')); 

+                } else { 

+                    return (10+ord(hchar)-ord('A'));

+                } 

+            }

+        '''

+        for func in c_function.searchString(source_code):

+            print("%(name)s (%(type)s) args: %(args)s" % func)

+

+    prints::

+        is_odd (int) args: [['int', 'x']]

+        dec_to_hex (int) args: [['char', 'hchar']]

+    """

+    if opener == closer:

+        raise ValueError("opening and closing strings cannot be the same")

+    if content is None:

+        if isinstance(opener,basestring) and isinstance(closer,basestring):

+            if len(opener) == 1 and len(closer)==1:

+                if ignoreExpr is not None:

+                    content = (Combine(OneOrMore(~ignoreExpr +

+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+                else:

+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS

+                                ).setParseAction(lambda t:t[0].strip()))

+            else:

+                if ignoreExpr is not None:

+                    content = (Combine(OneOrMore(~ignoreExpr + 

+                                    ~Literal(opener) + ~Literal(closer) +

+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+                else:

+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +

+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))

+                                ).setParseAction(lambda t:t[0].strip()))

+        else:

+            raise ValueError("opening and closing arguments must be strings if no content expression is given")

+    ret = Forward()

+    if ignoreExpr is not None:

+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )

+    else:

+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )

+    ret.setName('nested %s%s expression' % (opener,closer))

+    return ret

+

+def indentedBlock(blockStatementExpr, indentStack, indent=True):

+    """

+    Helper method for defining space-delimited indentation blocks, such as

+    those used to define block statements in Python source code.

+

+    Parameters:

+     - blockStatementExpr - expression defining syntax of statement that

+            is repeated within the indented block

+     - indentStack - list created by caller to manage indentation stack

+            (multiple statementWithIndentedBlock expressions within a single grammar

+            should share a common indentStack)

+     - indent - boolean indicating whether block must be indented beyond the

+            the current level; set to False for block of left-most statements

+            (default=C{True})

+

+    A valid block must contain at least one C{blockStatement}.

+

+    Example::

+        data = '''

+        def A(z):

+          A1

+          B = 100

+          G = A2

+          A2

+          A3

+        B

+        def BB(a,b,c):

+          BB1

+          def BBA():

+            bba1

+            bba2

+            bba3

+        C

+        D

+        def spam(x,y):

+             def eggs(z):

+                 pass

+        '''

+

+

+        indentStack = [1]

+        stmt = Forward()

+

+        identifier = Word(alphas, alphanums)

+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")

+        func_body = indentedBlock(stmt, indentStack)

+        funcDef = Group( funcDecl + func_body )

+

+        rvalue = Forward()

+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")

+        rvalue << (funcCall | identifier | Word(nums))

+        assignment = Group(identifier + "=" + rvalue)

+        stmt << ( funcDef | assignment | identifier )

+

+        module_body = OneOrMore(stmt)

+

+        parseTree = module_body.parseString(data)

+        parseTree.pprint()

+    prints::

+        [['def',

+          'A',

+          ['(', 'z', ')'],

+          ':',

+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],

+         'B',

+         ['def',

+          'BB',

+          ['(', 'a', 'b', 'c', ')'],

+          ':',

+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],

+         'C',

+         'D',

+         ['def',

+          'spam',

+          ['(', 'x', 'y', ')'],

+          ':',

+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 

+    """

+    def checkPeerIndent(s,l,t):

+        if l >= len(s): return

+        curCol = col(l,s)

+        if curCol != indentStack[-1]:

+            if curCol > indentStack[-1]:

+                raise ParseFatalException(s,l,"illegal nesting")

+            raise ParseException(s,l,"not a peer entry")

+

+    def checkSubIndent(s,l,t):

+        curCol = col(l,s)

+        if curCol > indentStack[-1]:

+            indentStack.append( curCol )

+        else:

+            raise ParseException(s,l,"not a subentry")

+

+    def checkUnindent(s,l,t):

+        if l >= len(s): return

+        curCol = col(l,s)

+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):

+            raise ParseException(s,l,"not an unindent")

+        indentStack.pop()

+

+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())

+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')

+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')

+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')

+    if indent:

+        smExpr = Group( Optional(NL) +

+            #~ FollowedBy(blockStatementExpr) +

+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)

+    else:

+        smExpr = Group( Optional(NL) +

+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )

+    blockStatementExpr.ignore(_bslash + LineEnd())

+    return smExpr.setName('indented block')

+

+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")

+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")

+

+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))

+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))

+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")

+def replaceHTMLEntity(t):

+    """Helper parser action to replace common HTML entities with their special characters"""

+    return _htmlEntityMap.get(t.entity)

+

+# it's easy to get these comment structures wrong - they're very common, so may as well make them available

+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")

+"Comment of the form C{/* ... */}"

+

+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")

+"Comment of the form C{<!-- ... -->}"

+

+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")

+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")

+"Comment of the form C{// ... (to end of line)}"

+

+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")

+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"

+

+javaStyleComment = cppStyleComment

+"Same as C{L{cppStyleComment}}"

+

+pythonStyleComment = Regex(r"#.*").setName("Python style comment")

+"Comment of the form C{# ... (to end of line)}"

+

+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +

+                                  Optional( Word(" \t") +

+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")

+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")

+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.

+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""

+

+# some other useful expressions - using lower-case class name since we are really using this as a namespace

+class pyparsing_common:

+    """

+    Here are some common low-level expressions that may be useful in jump-starting parser development:

+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})

+     - common L{programming identifiers<identifier>}

+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})

+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}

+     - L{UUID<uuid>}

+     - L{comma-separated list<comma_separated_list>}

+    Parse actions:

+     - C{L{convertToInteger}}

+     - C{L{convertToFloat}}

+     - C{L{convertToDate}}

+     - C{L{convertToDatetime}}

+     - C{L{stripHTMLTags}}

+     - C{L{upcaseTokens}}

+     - C{L{downcaseTokens}}

+

+    Example::

+        pyparsing_common.number.runTests('''

+            # any int or real number, returned as the appropriate type

+            100

+            -100

+            +100

+            3.14159

+            6.02e23

+            1e-12

+            ''')

+

+        pyparsing_common.fnumber.runTests('''

+            # any int or real number, returned as float

+            100

+            -100

+            +100

+            3.14159

+            6.02e23

+            1e-12

+            ''')

+

+        pyparsing_common.hex_integer.runTests('''

+            # hex numbers

+            100

+            FF

+            ''')

+

+        pyparsing_common.fraction.runTests('''

+            # fractions

+            1/2

+            -3/4

+            ''')

+

+        pyparsing_common.mixed_integer.runTests('''

+            # mixed fractions

+            1

+            1/2

+            -3/4

+            1-3/4

+            ''')

+

+        import uuid

+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))

+        pyparsing_common.uuid.runTests('''

+            # uuid

+            12345678-1234-5678-1234-567812345678

+            ''')

+    prints::

+        # any int or real number, returned as the appropriate type

+        100

+        [100]

+

+        -100

+        [-100]

+

+        +100

+        [100]

+

+        3.14159

+        [3.14159]

+

+        6.02e23

+        [6.02e+23]

+

+        1e-12

+        [1e-12]

+

+        # any int or real number, returned as float

+        100

+        [100.0]

+

+        -100

+        [-100.0]

+

+        +100

+        [100.0]

+

+        3.14159

+        [3.14159]

+

+        6.02e23

+        [6.02e+23]

+

+        1e-12

+        [1e-12]

+

+        # hex numbers

+        100

+        [256]

+

+        FF

+        [255]

+

+        # fractions

+        1/2

+        [0.5]

+

+        -3/4

+        [-0.75]

+

+        # mixed fractions

+        1

+        [1]

+

+        1/2

+        [0.5]

+

+        -3/4

+        [-0.75]

+

+        1-3/4

+        [1.75]

+

+        # uuid

+        12345678-1234-5678-1234-567812345678

+        [UUID('12345678-1234-5678-1234-567812345678')]

+    """

+

+    convertToInteger = tokenMap(int)

+    """

+    Parse action for converting parsed integers to Python int

+    """

+

+    convertToFloat = tokenMap(float)

+    """

+    Parse action for converting parsed numbers to Python float

+    """

+

+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)

+    """expression that parses an unsigned integer, returns an int"""

+

+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))

+    """expression that parses a hexadecimal integer, returns an int"""

+

+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)

+    """expression that parses an integer with optional leading sign, returns an int"""

+

+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")

+    """fractional expression of an integer divided by an integer, returns a float"""

+    fraction.addParseAction(lambda t: t[0]/t[-1])

+

+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")

+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""

+    mixed_integer.addParseAction(sum)

+

+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)

+    """expression that parses a floating point number and returns a float"""

+

+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)

+    """expression that parses a floating point number with optional scientific notation and returns a float"""

+

+    # streamlining this expression makes the docs nicer-looking

+    number = (sci_real | real | signed_integer).streamline()

+    """any numeric expression, returns the corresponding Python type"""

+

+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)

+    """any int or real number, returned as float"""

+    

+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")

+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""

+    

+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")

+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"

+

+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")

+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")

+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")

+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)

+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")

+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")

+    "IPv6 address (long, short, or mixed form)"

+    

+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")

+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"

+

+    @staticmethod

+    def convertToDate(fmt="%Y-%m-%d"):

+        """

+        Helper to create a parse action for converting parsed date string to Python datetime.date

+

+        Params -

+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})

+

+        Example::

+            date_expr = pyparsing_common.iso8601_date.copy()

+            date_expr.setParseAction(pyparsing_common.convertToDate())

+            print(date_expr.parseString("1999-12-31"))

+        prints::

+            [datetime.date(1999, 12, 31)]

+        """

+        def cvt_fn(s,l,t):

+            try:

+                return datetime.strptime(t[0], fmt).date()

+            except ValueError as ve:

+                raise ParseException(s, l, str(ve))

+        return cvt_fn

+

+    @staticmethod

+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):

+        """

+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime

+

+        Params -

+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})

+

+        Example::

+            dt_expr = pyparsing_common.iso8601_datetime.copy()

+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())

+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))

+        prints::

+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]

+        """

+        def cvt_fn(s,l,t):

+            try:

+                return datetime.strptime(t[0], fmt)

+            except ValueError as ve:

+                raise ParseException(s, l, str(ve))

+        return cvt_fn

+

+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")

+    "ISO8601 date (C{yyyy-mm-dd})"

+

+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")

+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"

+

+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")

+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"

+

+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()

+    @staticmethod

+    def stripHTMLTags(s, l, tokens):

+        """

+        Parse action to remove HTML tags from web page HTML source

+

+        Example::

+            # strip HTML links from normal text 

+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'

+            td,td_end = makeHTMLTags("TD")

+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end

+            

+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'

+        """

+        return pyparsing_common._html_stripper.transformString(tokens[0])

+

+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 

+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")

+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")

+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""

+

+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))

+    """Parse action to convert tokens to upper case."""

+

+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))

+    """Parse action to convert tokens to lower case."""

+

+

+if __name__ == "__main__":

+

+    selectToken    = CaselessLiteral("select")

+    fromToken      = CaselessLiteral("from")

+

+    ident          = Word(alphas, alphanums + "_$")

+

+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)

+    columnNameList = Group(delimitedList(columnName)).setName("columns")

+    columnSpec     = ('*' | columnNameList)

+

+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)

+    tableNameList  = Group(delimitedList(tableName)).setName("tables")

+    

+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")

+

+    # demo runTests method, including embedded comments in test string

+    simpleSQL.runTests("""

+        # '*' as column list and dotted table name

+        select * from SYS.XYZZY

+

+        # caseless match on "SELECT", and casts back to "select"

+        SELECT * from XYZZY, ABC

+

+        # list of column names, and mixed case SELECT keyword

+        Select AA,BB,CC from Sys.dual

+

+        # multiple tables

+        Select A, B, C from Sys.dual, Table2

+

+        # invalid SELECT keyword - should fail

+        Xelect A, B, C from Sys.dual

+

+        # incomplete command - should fail

+        Select

+

+        # invalid column name - should fail

+        Select ^^^ frox Sys.dual

+

+        """)

+

+    pyparsing_common.number.runTests("""

+        100

+        -100

+        +100

+        3.14159

+        6.02e23

+        1e-12

+        """)

+

+    # any int or real number, returned as float

+    pyparsing_common.fnumber.runTests("""

+        100

+        -100

+        +100

+        3.14159

+        6.02e23

+        1e-12

+        """)

+

+    pyparsing_common.hex_integer.runTests("""

+        100

+        FF

+        """)

+

+    import uuid

+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))

+    pyparsing_common.uuid.runTests("""

+        12345678-1234-5678-1234-567812345678

+        """)

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/six.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/six.py
new file mode 100644
index 00000000..190c0239
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/archive_util.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/archive_util.py
new file mode 100644
index 00000000..81436044
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/archive_util.py
@@ -0,0 +1,173 @@
+"""Utilities for extracting common archive formats"""
+
+import zipfile
+import tarfile
+import os
+import shutil
+import posixpath
+import contextlib
+from distutils.errors import DistutilsError
+
+from pkg_resources import ensure_directory
+
+__all__ = [
+    "unpack_archive", "unpack_zipfile", "unpack_tarfile", "default_filter",
+    "UnrecognizedFormat", "extraction_drivers", "unpack_directory",
+]
+
+
+class UnrecognizedFormat(DistutilsError):
+    """Couldn't recognize the archive type"""
+
+
+def default_filter(src, dst):
+    """The default progress/filter callback; returns True for all files"""
+    return dst
+
+
+def unpack_archive(filename, extract_dir, progress_filter=default_filter,
+        drivers=None):
+    """Unpack `filename` to `extract_dir`, or raise ``UnrecognizedFormat``
+
+    `progress_filter` is a function taking two arguments: a source path
+    internal to the archive ('/'-separated), and a filesystem path where it
+    will be extracted.  The callback must return the desired extract path
+    (which may be the same as the one passed in), or else ``None`` to skip
+    that file or directory.  The callback can thus be used to report on the
+    progress of the extraction, as well as to filter the items extracted or
+    alter their extraction paths.
+
+    `drivers`, if supplied, must be a non-empty sequence of functions with the
+    same signature as this function (minus the `drivers` argument), that raise
+    ``UnrecognizedFormat`` if they do not support extracting the designated
+    archive type.  The `drivers` are tried in sequence until one is found that
+    does not raise an error, or until all are exhausted (in which case
+    ``UnrecognizedFormat`` is raised).  If you do not supply a sequence of
+    drivers, the module's ``extraction_drivers`` constant will be used, which
+    means that ``unpack_zipfile`` and ``unpack_tarfile`` will be tried, in that
+    order.
+    """
+    for driver in drivers or extraction_drivers:
+        try:
+            driver(filename, extract_dir, progress_filter)
+        except UnrecognizedFormat:
+            continue
+        else:
+            return
+    else:
+        raise UnrecognizedFormat(
+            "Not a recognized archive type: %s" % filename
+        )
+
+
+def unpack_directory(filename, extract_dir, progress_filter=default_filter):
+    """"Unpack" a directory, using the same interface as for archives
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a directory
+    """
+    if not os.path.isdir(filename):
+        raise UnrecognizedFormat("%s is not a directory" % filename)
+
+    paths = {
+        filename: ('', extract_dir),
+    }
+    for base, dirs, files in os.walk(filename):
+        src, dst = paths[base]
+        for d in dirs:
+            paths[os.path.join(base, d)] = src + d + '/', os.path.join(dst, d)
+        for f in files:
+            target = os.path.join(dst, f)
+            target = progress_filter(src + f, target)
+            if not target:
+                # skip non-files
+                continue
+            ensure_directory(target)
+            f = os.path.join(base, f)
+            shutil.copyfile(f, target)
+            shutil.copystat(f, target)
+
+
+def unpack_zipfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack zip `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a zipfile (as determined
+    by ``zipfile.is_zipfile()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+
+    if not zipfile.is_zipfile(filename):
+        raise UnrecognizedFormat("%s is not a zip file" % (filename,))
+
+    with zipfile.ZipFile(filename) as z:
+        for info in z.infolist():
+            name = info.filename
+
+            # don't extract absolute paths or ones with .. in them
+            if name.startswith('/') or '..' in name.split('/'):
+                continue
+
+            target = os.path.join(extract_dir, *name.split('/'))
+            target = progress_filter(name, target)
+            if not target:
+                continue
+            if name.endswith('/'):
+                # directory
+                ensure_directory(target)
+            else:
+                # file
+                ensure_directory(target)
+                data = z.read(info.filename)
+                with open(target, 'wb') as f:
+                    f.write(data)
+            unix_attributes = info.external_attr >> 16
+            if unix_attributes:
+                os.chmod(target, unix_attributes)
+
+
+def unpack_tarfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a tarfile (as determined
+    by ``tarfile.open()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+    try:
+        tarobj = tarfile.open(filename)
+    except tarfile.TarError:
+        raise UnrecognizedFormat(
+            "%s is not a compressed or uncompressed tar file" % (filename,)
+        )
+    with contextlib.closing(tarobj):
+        # don't do any chowning!
+        tarobj.chown = lambda *args: None
+        for member in tarobj:
+            name = member.name
+            # don't extract absolute paths or ones with .. in them
+            if not name.startswith('/') and '..' not in name.split('/'):
+                prelim_dst = os.path.join(extract_dir, *name.split('/'))
+
+                # resolve any links and to extract the link targets as normal
+                # files
+                while member is not None and (member.islnk() or member.issym()):
+                    linkpath = member.linkname
+                    if member.issym():
+                        base = posixpath.dirname(member.name)
+                        linkpath = posixpath.join(base, linkpath)
+                        linkpath = posixpath.normpath(linkpath)
+                    member = tarobj._getmember(linkpath)
+
+                if member is not None and (member.isfile() or member.isdir()):
+                    final_dst = progress_filter(name, prelim_dst)
+                    if final_dst:
+                        if final_dst.endswith(os.sep):
+                            final_dst = final_dst[:-1]
+                        try:
+                            # XXX Ugh
+                            tarobj._extract_member(member, final_dst)
+                        except tarfile.ExtractError:
+                            # chown/chmod/mkfifo/mknode/makedev failed
+                            pass
+        return True
+
+
+extraction_drivers = unpack_directory, unpack_zipfile, unpack_tarfile
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/build_meta.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/build_meta.py
new file mode 100644
index 00000000..e40904a5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/build_meta.py
@@ -0,0 +1,254 @@
+"""A PEP 517 interface to setuptools
+
+Previously, when a user or a command line tool (let's call it a "frontend")
+needed to make a request of setuptools to take a certain action, for
+example, generating a list of installation requirements, the frontend would
+would call "setup.py egg_info" or "setup.py bdist_wheel" on the command line.
+
+PEP 517 defines a different method of interfacing with setuptools. Rather
+than calling "setup.py" directly, the frontend should:
+
+  1. Set the current directory to the directory with a setup.py file
+  2. Import this module into a safe python interpreter (one in which
+     setuptools can potentially set global variables or crash hard).
+  3. Call one of the functions defined in PEP 517.
+
+What each function does is defined in PEP 517. However, here is a "casual"
+definition of the functions (this definition should not be relied on for
+bug reports or API stability):
+
+  - `build_wheel`: build a wheel in the folder and return the basename
+  - `get_requires_for_build_wheel`: get the `setup_requires` to build
+  - `prepare_metadata_for_build_wheel`: get the `install_requires`
+  - `build_sdist`: build an sdist in the folder and return the basename
+  - `get_requires_for_build_sdist`: get the `setup_requires` to build
+
+Again, this is not a formal definition! Just a "taste" of the module.
+"""
+
+import io
+import os
+import sys
+import tokenize
+import shutil
+import contextlib
+
+import setuptools
+import distutils
+from setuptools.py31compat import TemporaryDirectory
+
+from pkg_resources import parse_requirements
+
+__all__ = ['get_requires_for_build_sdist',
+           'get_requires_for_build_wheel',
+           'prepare_metadata_for_build_wheel',
+           'build_wheel',
+           'build_sdist',
+           '__legacy__',
+           'SetupRequirementsError']
+
+class SetupRequirementsError(BaseException):
+    def __init__(self, specifiers):
+        self.specifiers = specifiers
+
+
+class Distribution(setuptools.dist.Distribution):
+    def fetch_build_eggs(self, specifiers):
+        specifier_list = list(map(str, parse_requirements(specifiers)))
+
+        raise SetupRequirementsError(specifier_list)
+
+    @classmethod
+    @contextlib.contextmanager
+    def patch(cls):
+        """
+        Replace
+        distutils.dist.Distribution with this class
+        for the duration of this context.
+        """
+        orig = distutils.core.Distribution
+        distutils.core.Distribution = cls
+        try:
+            yield
+        finally:
+            distutils.core.Distribution = orig
+
+
+def _to_str(s):
+    """
+    Convert a filename to a string (on Python 2, explicitly
+    a byte string, not Unicode) as distutils checks for the
+    exact type str.
+    """
+    if sys.version_info[0] == 2 and not isinstance(s, str):
+        # Assume it's Unicode, as that's what the PEP says
+        # should be provided.
+        return s.encode(sys.getfilesystemencoding())
+    return s
+
+
+def _get_immediate_subdirectories(a_dir):
+    return [name for name in os.listdir(a_dir)
+            if os.path.isdir(os.path.join(a_dir, name))]
+
+
+def _file_with_extension(directory, extension):
+    matching = (
+        f for f in os.listdir(directory)
+        if f.endswith(extension)
+    )
+    file, = matching
+    return file
+
+
+def _open_setup_script(setup_script):
+    if not os.path.exists(setup_script):
+        # Supply a default setup.py
+        return io.StringIO(u"from setuptools import setup; setup()")
+
+    return getattr(tokenize, 'open', open)(setup_script)
+
+
+class _BuildMetaBackend(object):
+
+    def _fix_config(self, config_settings):
+        config_settings = config_settings or {}
+        config_settings.setdefault('--global-option', [])
+        return config_settings
+
+    def _get_build_requires(self, config_settings, requirements):
+        config_settings = self._fix_config(config_settings)
+
+        sys.argv = sys.argv[:1] + ['egg_info'] + \
+            config_settings["--global-option"]
+        try:
+            with Distribution.patch():
+                self.run_setup()
+        except SetupRequirementsError as e:
+            requirements += e.specifiers
+
+        return requirements
+
+    def run_setup(self, setup_script='setup.py'):
+        # Note that we can reuse our build directory between calls
+        # Correctness comes first, then optimization later
+        __file__ = setup_script
+        __name__ = '__main__'
+
+        with _open_setup_script(__file__) as f:
+            code = f.read().replace(r'\r\n', r'\n')
+
+        exec(compile(code, __file__, 'exec'), locals())
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=['wheel'])
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=[])
+
+    def prepare_metadata_for_build_wheel(self, metadata_directory,
+                                         config_settings=None):
+        sys.argv = sys.argv[:1] + ['dist_info', '--egg-base',
+                                   _to_str(metadata_directory)]
+        self.run_setup()
+
+        dist_info_directory = metadata_directory
+        while True:
+            dist_infos = [f for f in os.listdir(dist_info_directory)
+                          if f.endswith('.dist-info')]
+
+            if (len(dist_infos) == 0 and
+                len(_get_immediate_subdirectories(dist_info_directory)) == 1):
+
+                dist_info_directory = os.path.join(
+                    dist_info_directory, os.listdir(dist_info_directory)[0])
+                continue
+
+            assert len(dist_infos) == 1
+            break
+
+        # PEP 517 requires that the .dist-info directory be placed in the
+        # metadata_directory. To comply, we MUST copy the directory to the root
+        if dist_info_directory != metadata_directory:
+            shutil.move(
+                os.path.join(dist_info_directory, dist_infos[0]),
+                metadata_directory)
+            shutil.rmtree(dist_info_directory, ignore_errors=True)
+
+        return dist_infos[0]
+
+    def build_wheel(self, wheel_directory, config_settings=None,
+                    metadata_directory=None):
+        config_settings = self._fix_config(config_settings)
+        wheel_directory = os.path.abspath(wheel_directory)
+
+        # Build the wheel in a temporary directory, then copy to the target
+        with TemporaryDirectory(dir=wheel_directory) as tmp_dist_dir:
+            sys.argv = (sys.argv[:1] +
+                        ['bdist_wheel', '--dist-dir', tmp_dist_dir] +
+                        config_settings["--global-option"])
+            self.run_setup()
+
+            wheel_basename = _file_with_extension(tmp_dist_dir, '.whl')
+            wheel_path = os.path.join(wheel_directory, wheel_basename)
+            if os.path.exists(wheel_path):
+                # os.rename will fail overwriting on non-unix env
+                os.remove(wheel_path)
+            os.rename(os.path.join(tmp_dist_dir, wheel_basename), wheel_path)
+
+        return wheel_basename
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        sdist_directory = os.path.abspath(sdist_directory)
+        sys.argv = sys.argv[:1] + ['sdist', '--formats', 'gztar'] + \
+            config_settings["--global-option"] + \
+            ["--dist-dir", sdist_directory]
+        self.run_setup()
+
+        return _file_with_extension(sdist_directory, '.tar.gz')
+
+
+class _BuildMetaLegacyBackend(_BuildMetaBackend):
+    """Compatibility backend for setuptools
+
+    This is a version of setuptools.build_meta that endeavors to maintain backwards
+    compatibility with pre-PEP 517 modes of invocation. It exists as a temporary
+    bridge between the old packaging mechanism and the new packaging mechanism,
+    and will eventually be removed.
+    """
+    def run_setup(self, setup_script='setup.py'):
+        # In order to maintain compatibility with scripts assuming that
+        # the setup.py script is in a directory on the PYTHONPATH, inject
+        # '' into sys.path. (pypa/setuptools#1642)
+        sys_path = list(sys.path)           # Save the original path
+
+        script_dir = os.path.dirname(os.path.abspath(setup_script))
+        if script_dir not in sys.path:
+            sys.path.insert(0, script_dir)
+
+        try:
+            super(_BuildMetaLegacyBackend,
+                  self).run_setup(setup_script=setup_script)
+        finally:
+            # While PEP 517 frontends should be calling each hook in a fresh
+            # subprocess according to the standard (and thus it should not be
+            # strictly necessary to restore the old sys.path), we'll restore
+            # the original path so that the path manipulation does not persist
+            # within the hook after run_setup is called.
+            sys.path[:] = sys_path
+
+# The primary backend
+_BACKEND = _BuildMetaBackend()
+
+get_requires_for_build_wheel = _BACKEND.get_requires_for_build_wheel
+get_requires_for_build_sdist = _BACKEND.get_requires_for_build_sdist
+prepare_metadata_for_build_wheel = _BACKEND.prepare_metadata_for_build_wheel
+build_wheel = _BACKEND.build_wheel
+build_sdist = _BACKEND.build_sdist
+
+
+# The legacy backend
+__legacy__ = _BuildMetaLegacyBackend()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-32.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-32.exe
new file mode 100644
index 00000000..b1487b78
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-32.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-64.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-64.exe
new file mode 100644
index 00000000..675e6bf3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli-64.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli.exe
new file mode 100644
index 00000000..b1487b78
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/cli.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__init__.py
new file mode 100644
index 00000000..fe619e2e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__init__.py
@@ -0,0 +1,18 @@
+__all__ = [
+    'alias', 'bdist_egg', 'bdist_rpm', 'build_ext', 'build_py', 'develop',
+    'easy_install', 'egg_info', 'install', 'install_lib', 'rotate', 'saveopts',
+    'sdist', 'setopt', 'test', 'install_egg_info', 'install_scripts',
+    'register', 'bdist_wininst', 'upload_docs', 'upload', 'build_clib',
+    'dist_info',
+]
+
+from distutils.command.bdist import bdist
+import sys
+
+from setuptools.command import install_scripts
+
+if 'egg' not in bdist.format_commands:
+    bdist.format_command['egg'] = ('bdist_egg', "Python .egg file")
+    bdist.format_commands.append('egg')
+
+del bdist, sys
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..61a1a150
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/alias.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/alias.cpython-37.pyc
new file mode 100644
index 00000000..f37983aa
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/alias.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_egg.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_egg.cpython-37.pyc
new file mode 100644
index 00000000..b85169d8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_egg.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_rpm.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_rpm.cpython-37.pyc
new file mode 100644
index 00000000..ca2f11e6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_rpm.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_wininst.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_wininst.cpython-37.pyc
new file mode 100644
index 00000000..9c1f4dde
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/bdist_wininst.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_clib.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_clib.cpython-37.pyc
new file mode 100644
index 00000000..63c9d96a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_clib.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_ext.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_ext.cpython-37.pyc
new file mode 100644
index 00000000..46bdbc53
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_ext.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_py.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_py.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/build_py.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/develop.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/develop.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/develop.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/dist_info.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/dist_info.cpython-37.pyc
new file mode 100644
index 00000000..311ec753
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/dist_info.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/easy_install.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/easy_install.cpython-37.pyc
new file mode 100644
index 00000000..1978c656
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/easy_install.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/egg_info.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/egg_info.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/egg_info.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_egg_info.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_egg_info.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_egg_info.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_lib.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_lib.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_lib.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_scripts.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_scripts.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/install_scripts.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/py36compat.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/py36compat.cpython-37.pyc
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diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/register.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/register.cpython-37.pyc
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+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/register.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/rotate.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/rotate.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/rotate.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/saveopts.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/saveopts.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/saveopts.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/sdist.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/sdist.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/sdist.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/setopt.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/setopt.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/setopt.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/test.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/test.cpython-37.pyc
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/test.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload.cpython-37.pyc
new file mode 100644
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--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload_docs.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload_docs.cpython-37.pyc
new file mode 100644
index 00000000..a20736e8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/__pycache__/upload_docs.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/alias.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/alias.py
new file mode 100644
index 00000000..4532b1cc
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/alias.py
@@ -0,0 +1,80 @@
+from distutils.errors import DistutilsOptionError
+
+from setuptools.extern.six.moves import map
+
+from setuptools.command.setopt import edit_config, option_base, config_file
+
+
+def shquote(arg):
+    """Quote an argument for later parsing by shlex.split()"""
+    for c in '"', "'", "\\", "#":
+        if c in arg:
+            return repr(arg)
+    if arg.split() != [arg]:
+        return repr(arg)
+    return arg
+
+
+class alias(option_base):
+    """Define a shortcut that invokes one or more commands"""
+
+    description = "define a shortcut to invoke one or more commands"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('remove', 'r', 'remove (unset) the alias'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.args = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.remove and len(self.args) != 1:
+            raise DistutilsOptionError(
+                "Must specify exactly one argument (the alias name) when "
+                "using --remove"
+            )
+
+    def run(self):
+        aliases = self.distribution.get_option_dict('aliases')
+
+        if not self.args:
+            print("Command Aliases")
+            print("---------------")
+            for alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+            return
+
+        elif len(self.args) == 1:
+            alias, = self.args
+            if self.remove:
+                command = None
+            elif alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+                return
+            else:
+                print("No alias definition found for %r" % alias)
+                return
+        else:
+            alias = self.args[0]
+            command = ' '.join(map(shquote, self.args[1:]))
+
+        edit_config(self.filename, {'aliases': {alias: command}}, self.dry_run)
+
+
+def format_alias(name, aliases):
+    source, command = aliases[name]
+    if source == config_file('global'):
+        source = '--global-config '
+    elif source == config_file('user'):
+        source = '--user-config '
+    elif source == config_file('local'):
+        source = ''
+    else:
+        source = '--filename=%r' % source
+    return source + name + ' ' + command
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_egg.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_egg.py
new file mode 100644
index 00000000..9f8df917
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_egg.py
@@ -0,0 +1,502 @@
+"""setuptools.command.bdist_egg
+
+Build .egg distributions"""
+
+from distutils.errors import DistutilsSetupError
+from distutils.dir_util import remove_tree, mkpath
+from distutils import log
+from types import CodeType
+import sys
+import os
+import re
+import textwrap
+import marshal
+
+from setuptools.extern import six
+
+from pkg_resources import get_build_platform, Distribution, ensure_directory
+from pkg_resources import EntryPoint
+from setuptools.extension import Library
+from setuptools import Command
+
+try:
+    # Python 2.7 or >=3.2
+    from sysconfig import get_path, get_python_version
+
+    def _get_purelib():
+        return get_path("purelib")
+except ImportError:
+    from distutils.sysconfig import get_python_lib, get_python_version
+
+    def _get_purelib():
+        return get_python_lib(False)
+
+
+def strip_module(filename):
+    if '.' in filename:
+        filename = os.path.splitext(filename)[0]
+    if filename.endswith('module'):
+        filename = filename[:-6]
+    return filename
+
+
+def sorted_walk(dir):
+    """Do os.walk in a reproducible way,
+    independent of indeterministic filesystem readdir order
+    """
+    for base, dirs, files in os.walk(dir):
+        dirs.sort()
+        files.sort()
+        yield base, dirs, files
+
+
+def write_stub(resource, pyfile):
+    _stub_template = textwrap.dedent("""
+        def __bootstrap__():
+            global __bootstrap__, __loader__, __file__
+            import sys, pkg_resources, imp
+            __file__ = pkg_resources.resource_filename(__name__, %r)
+            __loader__ = None; del __bootstrap__, __loader__
+            imp.load_dynamic(__name__,__file__)
+        __bootstrap__()
+        """).lstrip()
+    with open(pyfile, 'w') as f:
+        f.write(_stub_template % resource)
+
+
+class bdist_egg(Command):
+    description = "create an \"egg\" distribution"
+
+    user_options = [
+        ('bdist-dir=', 'b',
+         "temporary directory for creating the distribution"),
+        ('plat-name=', 'p', "platform name to embed in generated filenames "
+                            "(default: %s)" % get_build_platform()),
+        ('exclude-source-files', None,
+         "remove all .py files from the generated egg"),
+        ('keep-temp', 'k',
+         "keep the pseudo-installation tree around after " +
+         "creating the distribution archive"),
+        ('dist-dir=', 'd',
+         "directory to put final built distributions in"),
+        ('skip-build', None,
+         "skip rebuilding everything (for testing/debugging)"),
+    ]
+
+    boolean_options = [
+        'keep-temp', 'skip-build', 'exclude-source-files'
+    ]
+
+    def initialize_options(self):
+        self.bdist_dir = None
+        self.plat_name = None
+        self.keep_temp = 0
+        self.dist_dir = None
+        self.skip_build = 0
+        self.egg_output = None
+        self.exclude_source_files = None
+
+    def finalize_options(self):
+        ei_cmd = self.ei_cmd = self.get_finalized_command("egg_info")
+        self.egg_info = ei_cmd.egg_info
+
+        if self.bdist_dir is None:
+            bdist_base = self.get_finalized_command('bdist').bdist_base
+            self.bdist_dir = os.path.join(bdist_base, 'egg')
+
+        if self.plat_name is None:
+            self.plat_name = get_build_platform()
+
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+        if self.egg_output is None:
+
+            # Compute filename of the output egg
+            basename = Distribution(
+                None, None, ei_cmd.egg_name, ei_cmd.egg_version,
+                get_python_version(),
+                self.distribution.has_ext_modules() and self.plat_name
+            ).egg_name()
+
+            self.egg_output = os.path.join(self.dist_dir, basename + '.egg')
+
+    def do_install_data(self):
+        # Hack for packages that install data to install's --install-lib
+        self.get_finalized_command('install').install_lib = self.bdist_dir
+
+        site_packages = os.path.normcase(os.path.realpath(_get_purelib()))
+        old, self.distribution.data_files = self.distribution.data_files, []
+
+        for item in old:
+            if isinstance(item, tuple) and len(item) == 2:
+                if os.path.isabs(item[0]):
+                    realpath = os.path.realpath(item[0])
+                    normalized = os.path.normcase(realpath)
+                    if normalized == site_packages or normalized.startswith(
+                        site_packages + os.sep
+                    ):
+                        item = realpath[len(site_packages) + 1:], item[1]
+                        # XXX else: raise ???
+            self.distribution.data_files.append(item)
+
+        try:
+            log.info("installing package data to %s", self.bdist_dir)
+            self.call_command('install_data', force=0, root=None)
+        finally:
+            self.distribution.data_files = old
+
+    def get_outputs(self):
+        return [self.egg_output]
+
+    def call_command(self, cmdname, **kw):
+        """Invoke reinitialized command `cmdname` with keyword args"""
+        for dirname in INSTALL_DIRECTORY_ATTRS:
+            kw.setdefault(dirname, self.bdist_dir)
+        kw.setdefault('skip_build', self.skip_build)
+        kw.setdefault('dry_run', self.dry_run)
+        cmd = self.reinitialize_command(cmdname, **kw)
+        self.run_command(cmdname)
+        return cmd
+
+    def run(self):
+        # Generate metadata first
+        self.run_command("egg_info")
+        # We run install_lib before install_data, because some data hacks
+        # pull their data path from the install_lib command.
+        log.info("installing library code to %s", self.bdist_dir)
+        instcmd = self.get_finalized_command('install')
+        old_root = instcmd.root
+        instcmd.root = None
+        if self.distribution.has_c_libraries() and not self.skip_build:
+            self.run_command('build_clib')
+        cmd = self.call_command('install_lib', warn_dir=0)
+        instcmd.root = old_root
+
+        all_outputs, ext_outputs = self.get_ext_outputs()
+        self.stubs = []
+        to_compile = []
+        for (p, ext_name) in enumerate(ext_outputs):
+            filename, ext = os.path.splitext(ext_name)
+            pyfile = os.path.join(self.bdist_dir, strip_module(filename) +
+                                  '.py')
+            self.stubs.append(pyfile)
+            log.info("creating stub loader for %s", ext_name)
+            if not self.dry_run:
+                write_stub(os.path.basename(ext_name), pyfile)
+            to_compile.append(pyfile)
+            ext_outputs[p] = ext_name.replace(os.sep, '/')
+
+        if to_compile:
+            cmd.byte_compile(to_compile)
+        if self.distribution.data_files:
+            self.do_install_data()
+
+        # Make the EGG-INFO directory
+        archive_root = self.bdist_dir
+        egg_info = os.path.join(archive_root, 'EGG-INFO')
+        self.mkpath(egg_info)
+        if self.distribution.scripts:
+            script_dir = os.path.join(egg_info, 'scripts')
+            log.info("installing scripts to %s", script_dir)
+            self.call_command('install_scripts', install_dir=script_dir,
+                              no_ep=1)
+
+        self.copy_metadata_to(egg_info)
+        native_libs = os.path.join(egg_info, "native_libs.txt")
+        if all_outputs:
+            log.info("writing %s", native_libs)
+            if not self.dry_run:
+                ensure_directory(native_libs)
+                libs_file = open(native_libs, 'wt')
+                libs_file.write('\n'.join(all_outputs))
+                libs_file.write('\n')
+                libs_file.close()
+        elif os.path.isfile(native_libs):
+            log.info("removing %s", native_libs)
+            if not self.dry_run:
+                os.unlink(native_libs)
+
+        write_safety_flag(
+            os.path.join(archive_root, 'EGG-INFO'), self.zip_safe()
+        )
+
+        if os.path.exists(os.path.join(self.egg_info, 'depends.txt')):
+            log.warn(
+                "WARNING: 'depends.txt' will not be used by setuptools 0.6!\n"
+                "Use the install_requires/extras_require setup() args instead."
+            )
+
+        if self.exclude_source_files:
+            self.zap_pyfiles()
+
+        # Make the archive
+        make_zipfile(self.egg_output, archive_root, verbose=self.verbose,
+                     dry_run=self.dry_run, mode=self.gen_header())
+        if not self.keep_temp:
+            remove_tree(self.bdist_dir, dry_run=self.dry_run)
+
+        # Add to 'Distribution.dist_files' so that the "upload" command works
+        getattr(self.distribution, 'dist_files', []).append(
+            ('bdist_egg', get_python_version(), self.egg_output))
+
+    def zap_pyfiles(self):
+        log.info("Removing .py files from temporary directory")
+        for base, dirs, files in walk_egg(self.bdist_dir):
+            for name in files:
+                path = os.path.join(base, name)
+
+                if name.endswith('.py'):
+                    log.debug("Deleting %s", path)
+                    os.unlink(path)
+
+                if base.endswith('__pycache__'):
+                    path_old = path
+
+                    pattern = r'(?P<name>.+)\.(?P<magic>[^.]+)\.pyc'
+                    m = re.match(pattern, name)
+                    path_new = os.path.join(
+                        base, os.pardir, m.group('name') + '.pyc')
+                    log.info(
+                        "Renaming file from [%s] to [%s]"
+                        % (path_old, path_new))
+                    try:
+                        os.remove(path_new)
+                    except OSError:
+                        pass
+                    os.rename(path_old, path_new)
+
+    def zip_safe(self):
+        safe = getattr(self.distribution, 'zip_safe', None)
+        if safe is not None:
+            return safe
+        log.warn("zip_safe flag not set; analyzing archive contents...")
+        return analyze_egg(self.bdist_dir, self.stubs)
+
+    def gen_header(self):
+        epm = EntryPoint.parse_map(self.distribution.entry_points or '')
+        ep = epm.get('setuptools.installation', {}).get('eggsecutable')
+        if ep is None:
+            return 'w'  # not an eggsecutable, do it the usual way.
+
+        if not ep.attrs or ep.extras:
+            raise DistutilsSetupError(
+                "eggsecutable entry point (%r) cannot have 'extras' "
+                "or refer to a module" % (ep,)
+            )
+
+        pyver = sys.version[:3]
+        pkg = ep.module_name
+        full = '.'.join(ep.attrs)
+        base = ep.attrs[0]
+        basename = os.path.basename(self.egg_output)
+
+        header = (
+            "#!/bin/sh\n"
+            'if [ `basename $0` = "%(basename)s" ]\n'
+            'then exec python%(pyver)s -c "'
+            "import sys, os; sys.path.insert(0, os.path.abspath('$0')); "
+            "from %(pkg)s import %(base)s; sys.exit(%(full)s())"
+            '" "$@"\n'
+            'else\n'
+            '  echo $0 is not the correct name for this egg file.\n'
+            '  echo Please rename it back to %(basename)s and try again.\n'
+            '  exec false\n'
+            'fi\n'
+        ) % locals()
+
+        if not self.dry_run:
+            mkpath(os.path.dirname(self.egg_output), dry_run=self.dry_run)
+            f = open(self.egg_output, 'w')
+            f.write(header)
+            f.close()
+        return 'a'
+
+    def copy_metadata_to(self, target_dir):
+        "Copy metadata (egg info) to the target_dir"
+        # normalize the path (so that a forward-slash in egg_info will
+        # match using startswith below)
+        norm_egg_info = os.path.normpath(self.egg_info)
+        prefix = os.path.join(norm_egg_info, '')
+        for path in self.ei_cmd.filelist.files:
+            if path.startswith(prefix):
+                target = os.path.join(target_dir, path[len(prefix):])
+                ensure_directory(target)
+                self.copy_file(path, target)
+
+    def get_ext_outputs(self):
+        """Get a list of relative paths to C extensions in the output distro"""
+
+        all_outputs = []
+        ext_outputs = []
+
+        paths = {self.bdist_dir: ''}
+        for base, dirs, files in sorted_walk(self.bdist_dir):
+            for filename in files:
+                if os.path.splitext(filename)[1].lower() in NATIVE_EXTENSIONS:
+                    all_outputs.append(paths[base] + filename)
+            for filename in dirs:
+                paths[os.path.join(base, filename)] = (paths[base] +
+                                                       filename + '/')
+
+        if self.distribution.has_ext_modules():
+            build_cmd = self.get_finalized_command('build_ext')
+            for ext in build_cmd.extensions:
+                if isinstance(ext, Library):
+                    continue
+                fullname = build_cmd.get_ext_fullname(ext.name)
+                filename = build_cmd.get_ext_filename(fullname)
+                if not os.path.basename(filename).startswith('dl-'):
+                    if os.path.exists(os.path.join(self.bdist_dir, filename)):
+                        ext_outputs.append(filename)
+
+        return all_outputs, ext_outputs
+
+
+NATIVE_EXTENSIONS = dict.fromkeys('.dll .so .dylib .pyd'.split())
+
+
+def walk_egg(egg_dir):
+    """Walk an unpacked egg's contents, skipping the metadata directory"""
+    walker = sorted_walk(egg_dir)
+    base, dirs, files = next(walker)
+    if 'EGG-INFO' in dirs:
+        dirs.remove('EGG-INFO')
+    yield base, dirs, files
+    for bdf in walker:
+        yield bdf
+
+
+def analyze_egg(egg_dir, stubs):
+    # check for existing flag in EGG-INFO
+    for flag, fn in safety_flags.items():
+        if os.path.exists(os.path.join(egg_dir, 'EGG-INFO', fn)):
+            return flag
+    if not can_scan():
+        return False
+    safe = True
+    for base, dirs, files in walk_egg(egg_dir):
+        for name in files:
+            if name.endswith('.py') or name.endswith('.pyw'):
+                continue
+            elif name.endswith('.pyc') or name.endswith('.pyo'):
+                # always scan, even if we already know we're not safe
+                safe = scan_module(egg_dir, base, name, stubs) and safe
+    return safe
+
+
+def write_safety_flag(egg_dir, safe):
+    # Write or remove zip safety flag file(s)
+    for flag, fn in safety_flags.items():
+        fn = os.path.join(egg_dir, fn)
+        if os.path.exists(fn):
+            if safe is None or bool(safe) != flag:
+                os.unlink(fn)
+        elif safe is not None and bool(safe) == flag:
+            f = open(fn, 'wt')
+            f.write('\n')
+            f.close()
+
+
+safety_flags = {
+    True: 'zip-safe',
+    False: 'not-zip-safe',
+}
+
+
+def scan_module(egg_dir, base, name, stubs):
+    """Check whether module possibly uses unsafe-for-zipfile stuff"""
+
+    filename = os.path.join(base, name)
+    if filename[:-1] in stubs:
+        return True  # Extension module
+    pkg = base[len(egg_dir) + 1:].replace(os.sep, '.')
+    module = pkg + (pkg and '.' or '') + os.path.splitext(name)[0]
+    if six.PY2:
+        skip = 8  # skip magic & date
+    elif sys.version_info < (3, 7):
+        skip = 12  # skip magic & date & file size
+    else:
+        skip = 16  # skip magic & reserved? & date & file size
+    f = open(filename, 'rb')
+    f.read(skip)
+    code = marshal.load(f)
+    f.close()
+    safe = True
+    symbols = dict.fromkeys(iter_symbols(code))
+    for bad in ['__file__', '__path__']:
+        if bad in symbols:
+            log.warn("%s: module references %s", module, bad)
+            safe = False
+    if 'inspect' in symbols:
+        for bad in [
+            'getsource', 'getabsfile', 'getsourcefile', 'getfile'
+            'getsourcelines', 'findsource', 'getcomments', 'getframeinfo',
+            'getinnerframes', 'getouterframes', 'stack', 'trace'
+        ]:
+            if bad in symbols:
+                log.warn("%s: module MAY be using inspect.%s", module, bad)
+                safe = False
+    return safe
+
+
+def iter_symbols(code):
+    """Yield names and strings used by `code` and its nested code objects"""
+    for name in code.co_names:
+        yield name
+    for const in code.co_consts:
+        if isinstance(const, six.string_types):
+            yield const
+        elif isinstance(const, CodeType):
+            for name in iter_symbols(const):
+                yield name
+
+
+def can_scan():
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        # CPython, PyPy, etc.
+        return True
+    log.warn("Unable to analyze compiled code on this platform.")
+    log.warn("Please ask the author to include a 'zip_safe'"
+             " setting (either True or False) in the package's setup.py")
+
+
+# Attribute names of options for commands that might need to be convinced to
+# install to the egg build directory
+
+INSTALL_DIRECTORY_ATTRS = [
+    'install_lib', 'install_dir', 'install_data', 'install_base'
+]
+
+
+def make_zipfile(zip_filename, base_dir, verbose=0, dry_run=0, compress=True,
+                 mode='w'):
+    """Create a zip file from all the files under 'base_dir'.  The output
+    zip file will be named 'base_dir' + ".zip".  Uses either the "zipfile"
+    Python module (if available) or the InfoZIP "zip" utility (if installed
+    and found on the default search path).  If neither tool is available,
+    raises DistutilsExecError.  Returns the name of the output zip file.
+    """
+    import zipfile
+
+    mkpath(os.path.dirname(zip_filename), dry_run=dry_run)
+    log.info("creating '%s' and adding '%s' to it", zip_filename, base_dir)
+
+    def visit(z, dirname, names):
+        for name in names:
+            path = os.path.normpath(os.path.join(dirname, name))
+            if os.path.isfile(path):
+                p = path[len(base_dir) + 1:]
+                if not dry_run:
+                    z.write(path, p)
+                log.debug("adding '%s'", p)
+
+    compression = zipfile.ZIP_DEFLATED if compress else zipfile.ZIP_STORED
+    if not dry_run:
+        z = zipfile.ZipFile(zip_filename, mode, compression=compression)
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(z, dirname, files)
+        z.close()
+    else:
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(None, dirname, files)
+    return zip_filename
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_rpm.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_rpm.py
new file mode 100644
index 00000000..70730927
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_rpm.py
@@ -0,0 +1,43 @@
+import distutils.command.bdist_rpm as orig
+
+
+class bdist_rpm(orig.bdist_rpm):
+    """
+    Override the default bdist_rpm behavior to do the following:
+
+    1. Run egg_info to ensure the name and version are properly calculated.
+    2. Always run 'install' using --single-version-externally-managed to
+       disable eggs in RPM distributions.
+    3. Replace dash with underscore in the version numbers for better RPM
+       compatibility.
+    """
+
+    def run(self):
+        # ensure distro name is up-to-date
+        self.run_command('egg_info')
+
+        orig.bdist_rpm.run(self)
+
+    def _make_spec_file(self):
+        version = self.distribution.get_version()
+        rpmversion = version.replace('-', '_')
+        spec = orig.bdist_rpm._make_spec_file(self)
+        line23 = '%define version ' + version
+        line24 = '%define version ' + rpmversion
+        spec = [
+            line.replace(
+                "Source0: %{name}-%{version}.tar",
+                "Source0: %{name}-%{unmangled_version}.tar"
+            ).replace(
+                "setup.py install ",
+                "setup.py install --single-version-externally-managed "
+            ).replace(
+                "%setup",
+                "%setup -n %{name}-%{unmangled_version}"
+            ).replace(line23, line24)
+            for line in spec
+        ]
+        insert_loc = spec.index(line24) + 1
+        unmangled_version = "%define unmangled_version " + version
+        spec.insert(insert_loc, unmangled_version)
+        return spec
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_wininst.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_wininst.py
new file mode 100644
index 00000000..073de97b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/bdist_wininst.py
@@ -0,0 +1,21 @@
+import distutils.command.bdist_wininst as orig
+
+
+class bdist_wininst(orig.bdist_wininst):
+    def reinitialize_command(self, command, reinit_subcommands=0):
+        """
+        Supplement reinitialize_command to work around
+        http://bugs.python.org/issue20819
+        """
+        cmd = self.distribution.reinitialize_command(
+            command, reinit_subcommands)
+        if command in ('install', 'install_lib'):
+            cmd.install_lib = None
+        return cmd
+
+    def run(self):
+        self._is_running = True
+        try:
+            orig.bdist_wininst.run(self)
+        finally:
+            self._is_running = False
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_clib.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_clib.py
new file mode 100644
index 00000000..09caff6f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_clib.py
@@ -0,0 +1,98 @@
+import distutils.command.build_clib as orig
+from distutils.errors import DistutilsSetupError
+from distutils import log
+from setuptools.dep_util import newer_pairwise_group
+
+
+class build_clib(orig.build_clib):
+    """
+    Override the default build_clib behaviour to do the following:
+
+    1. Implement a rudimentary timestamp-based dependency system
+       so 'compile()' doesn't run every time.
+    2. Add more keys to the 'build_info' dictionary:
+        * obj_deps - specify dependencies for each object compiled.
+                     this should be a dictionary mapping a key
+                     with the source filename to a list of
+                     dependencies. Use an empty string for global
+                     dependencies.
+        * cflags   - specify a list of additional flags to pass to
+                     the compiler.
+    """
+
+    def build_libraries(self, libraries):
+        for (lib_name, build_info) in libraries:
+            sources = build_info.get('sources')
+            if sources is None or not isinstance(sources, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'sources' must be present and must be "
+                       "a list of source filenames" % lib_name)
+            sources = list(sources)
+
+            log.info("building '%s' library", lib_name)
+
+            # Make sure everything is the correct type.
+            # obj_deps should be a dictionary of keys as sources
+            # and a list/tuple of files that are its dependencies.
+            obj_deps = build_info.get('obj_deps', dict())
+            if not isinstance(obj_deps, dict):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+            dependencies = []
+
+            # Get the global dependencies that are specified by the '' key.
+            # These will go into every source's dependency list.
+            global_deps = obj_deps.get('', list())
+            if not isinstance(global_deps, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+
+            # Build the list to be used by newer_pairwise_group
+            # each source will be auto-added to its dependencies.
+            for source in sources:
+                src_deps = [source]
+                src_deps.extend(global_deps)
+                extra_deps = obj_deps.get(source, list())
+                if not isinstance(extra_deps, (list, tuple)):
+                    raise DistutilsSetupError(
+                           "in 'libraries' option (library '%s'), "
+                           "'obj_deps' must be a dictionary of "
+                           "type 'source: list'" % lib_name)
+                src_deps.extend(extra_deps)
+                dependencies.append(src_deps)
+
+            expected_objects = self.compiler.object_filenames(
+                    sources,
+                    output_dir=self.build_temp
+                    )
+
+            if newer_pairwise_group(dependencies, expected_objects) != ([], []):
+                # First, compile the source code to object files in the library
+                # directory.  (This should probably change to putting object
+                # files in a temporary build directory.)
+                macros = build_info.get('macros')
+                include_dirs = build_info.get('include_dirs')
+                cflags = build_info.get('cflags')
+                objects = self.compiler.compile(
+                        sources,
+                        output_dir=self.build_temp,
+                        macros=macros,
+                        include_dirs=include_dirs,
+                        extra_postargs=cflags,
+                        debug=self.debug
+                        )
+
+            # Now "link" the object files together into a static library.
+            # (On Unix at least, this isn't really linking -- it just
+            # builds an archive.  Whatever.)
+            self.compiler.create_static_lib(
+                    expected_objects,
+                    lib_name,
+                    output_dir=self.build_clib,
+                    debug=self.debug
+                    )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_ext.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_ext.py
new file mode 100644
index 00000000..60a8a32f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_ext.py
@@ -0,0 +1,321 @@
+import os
+import sys
+import itertools
+import imp
+from distutils.command.build_ext import build_ext as _du_build_ext
+from distutils.file_util import copy_file
+from distutils.ccompiler import new_compiler
+from distutils.sysconfig import customize_compiler, get_config_var
+from distutils.errors import DistutilsError
+from distutils import log
+
+from setuptools.extension import Library
+from setuptools.extern import six
+
+try:
+    # Attempt to use Cython for building extensions, if available
+    from Cython.Distutils.build_ext import build_ext as _build_ext
+    # Additionally, assert that the compiler module will load
+    # also. Ref #1229.
+    __import__('Cython.Compiler.Main')
+except ImportError:
+    _build_ext = _du_build_ext
+
+# make sure _config_vars is initialized
+get_config_var("LDSHARED")
+from distutils.sysconfig import _config_vars as _CONFIG_VARS
+
+
+def _customize_compiler_for_shlib(compiler):
+    if sys.platform == "darwin":
+        # building .dylib requires additional compiler flags on OSX; here we
+        # temporarily substitute the pyconfig.h variables so that distutils'
+        # 'customize_compiler' uses them before we build the shared libraries.
+        tmp = _CONFIG_VARS.copy()
+        try:
+            # XXX Help!  I don't have any idea whether these are right...
+            _CONFIG_VARS['LDSHARED'] = (
+                "gcc -Wl,-x -dynamiclib -undefined dynamic_lookup")
+            _CONFIG_VARS['CCSHARED'] = " -dynamiclib"
+            _CONFIG_VARS['SO'] = ".dylib"
+            customize_compiler(compiler)
+        finally:
+            _CONFIG_VARS.clear()
+            _CONFIG_VARS.update(tmp)
+    else:
+        customize_compiler(compiler)
+
+
+have_rtld = False
+use_stubs = False
+libtype = 'shared'
+
+if sys.platform == "darwin":
+    use_stubs = True
+elif os.name != 'nt':
+    try:
+        import dl
+        use_stubs = have_rtld = hasattr(dl, 'RTLD_NOW')
+    except ImportError:
+        pass
+
+if_dl = lambda s: s if have_rtld else ''
+
+
+def get_abi3_suffix():
+    """Return the file extension for an abi3-compliant Extension()"""
+    for suffix, _, _ in (s for s in imp.get_suffixes() if s[2] == imp.C_EXTENSION):
+        if '.abi3' in suffix:  # Unix
+            return suffix
+        elif suffix == '.pyd':  # Windows
+            return suffix
+
+
+class build_ext(_build_ext):
+    def run(self):
+        """Build extensions in build directory, then copy if --inplace"""
+        old_inplace, self.inplace = self.inplace, 0
+        _build_ext.run(self)
+        self.inplace = old_inplace
+        if old_inplace:
+            self.copy_extensions_to_source()
+
+    def copy_extensions_to_source(self):
+        build_py = self.get_finalized_command('build_py')
+        for ext in self.extensions:
+            fullname = self.get_ext_fullname(ext.name)
+            filename = self.get_ext_filename(fullname)
+            modpath = fullname.split('.')
+            package = '.'.join(modpath[:-1])
+            package_dir = build_py.get_package_dir(package)
+            dest_filename = os.path.join(package_dir,
+                                         os.path.basename(filename))
+            src_filename = os.path.join(self.build_lib, filename)
+
+            # Always copy, even if source is older than destination, to ensure
+            # that the right extensions for the current Python/platform are
+            # used.
+            copy_file(
+                src_filename, dest_filename, verbose=self.verbose,
+                dry_run=self.dry_run
+            )
+            if ext._needs_stub:
+                self.write_stub(package_dir or os.curdir, ext, True)
+
+    def get_ext_filename(self, fullname):
+        filename = _build_ext.get_ext_filename(self, fullname)
+        if fullname in self.ext_map:
+            ext = self.ext_map[fullname]
+            use_abi3 = (
+                six.PY3
+                and getattr(ext, 'py_limited_api')
+                and get_abi3_suffix()
+            )
+            if use_abi3:
+                so_ext = get_config_var('EXT_SUFFIX')
+                filename = filename[:-len(so_ext)]
+                filename = filename + get_abi3_suffix()
+            if isinstance(ext, Library):
+                fn, ext = os.path.splitext(filename)
+                return self.shlib_compiler.library_filename(fn, libtype)
+            elif use_stubs and ext._links_to_dynamic:
+                d, fn = os.path.split(filename)
+                return os.path.join(d, 'dl-' + fn)
+        return filename
+
+    def initialize_options(self):
+        _build_ext.initialize_options(self)
+        self.shlib_compiler = None
+        self.shlibs = []
+        self.ext_map = {}
+
+    def finalize_options(self):
+        _build_ext.finalize_options(self)
+        self.extensions = self.extensions or []
+        self.check_extensions_list(self.extensions)
+        self.shlibs = [ext for ext in self.extensions
+                       if isinstance(ext, Library)]
+        if self.shlibs:
+            self.setup_shlib_compiler()
+        for ext in self.extensions:
+            ext._full_name = self.get_ext_fullname(ext.name)
+        for ext in self.extensions:
+            fullname = ext._full_name
+            self.ext_map[fullname] = ext
+
+            # distutils 3.1 will also ask for module names
+            # XXX what to do with conflicts?
+            self.ext_map[fullname.split('.')[-1]] = ext
+
+            ltd = self.shlibs and self.links_to_dynamic(ext) or False
+            ns = ltd and use_stubs and not isinstance(ext, Library)
+            ext._links_to_dynamic = ltd
+            ext._needs_stub = ns
+            filename = ext._file_name = self.get_ext_filename(fullname)
+            libdir = os.path.dirname(os.path.join(self.build_lib, filename))
+            if ltd and libdir not in ext.library_dirs:
+                ext.library_dirs.append(libdir)
+            if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
+                ext.runtime_library_dirs.append(os.curdir)
+
+    def setup_shlib_compiler(self):
+        compiler = self.shlib_compiler = new_compiler(
+            compiler=self.compiler, dry_run=self.dry_run, force=self.force
+        )
+        _customize_compiler_for_shlib(compiler)
+
+        if self.include_dirs is not None:
+            compiler.set_include_dirs(self.include_dirs)
+        if self.define is not None:
+            # 'define' option is a list of (name,value) tuples
+            for (name, value) in self.define:
+                compiler.define_macro(name, value)
+        if self.undef is not None:
+            for macro in self.undef:
+                compiler.undefine_macro(macro)
+        if self.libraries is not None:
+            compiler.set_libraries(self.libraries)
+        if self.library_dirs is not None:
+            compiler.set_library_dirs(self.library_dirs)
+        if self.rpath is not None:
+            compiler.set_runtime_library_dirs(self.rpath)
+        if self.link_objects is not None:
+            compiler.set_link_objects(self.link_objects)
+
+        # hack so distutils' build_extension() builds a library instead
+        compiler.link_shared_object = link_shared_object.__get__(compiler)
+
+    def get_export_symbols(self, ext):
+        if isinstance(ext, Library):
+            return ext.export_symbols
+        return _build_ext.get_export_symbols(self, ext)
+
+    def build_extension(self, ext):
+        ext._convert_pyx_sources_to_lang()
+        _compiler = self.compiler
+        try:
+            if isinstance(ext, Library):
+                self.compiler = self.shlib_compiler
+            _build_ext.build_extension(self, ext)
+            if ext._needs_stub:
+                cmd = self.get_finalized_command('build_py').build_lib
+                self.write_stub(cmd, ext)
+        finally:
+            self.compiler = _compiler
+
+    def links_to_dynamic(self, ext):
+        """Return true if 'ext' links to a dynamic lib in the same package"""
+        # XXX this should check to ensure the lib is actually being built
+        # XXX as dynamic, and not just using a locally-found version or a
+        # XXX static-compiled version
+        libnames = dict.fromkeys([lib._full_name for lib in self.shlibs])
+        pkg = '.'.join(ext._full_name.split('.')[:-1] + [''])
+        return any(pkg + libname in libnames for libname in ext.libraries)
+
+    def get_outputs(self):
+        return _build_ext.get_outputs(self) + self.__get_stubs_outputs()
+
+    def __get_stubs_outputs(self):
+        # assemble the base name for each extension that needs a stub
+        ns_ext_bases = (
+            os.path.join(self.build_lib, *ext._full_name.split('.'))
+            for ext in self.extensions
+            if ext._needs_stub
+        )
+        # pair each base with the extension
+        pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
+        return list(base + fnext for base, fnext in pairs)
+
+    def __get_output_extensions(self):
+        yield '.py'
+        yield '.pyc'
+        if self.get_finalized_command('build_py').optimize:
+            yield '.pyo'
+
+    def write_stub(self, output_dir, ext, compile=False):
+        log.info("writing stub loader for %s to %s", ext._full_name,
+                 output_dir)
+        stub_file = (os.path.join(output_dir, *ext._full_name.split('.')) +
+                     '.py')
+        if compile and os.path.exists(stub_file):
+            raise DistutilsError(stub_file + " already exists! Please delete.")
+        if not self.dry_run:
+            f = open(stub_file, 'w')
+            f.write(
+                '\n'.join([
+                    "def __bootstrap__():",
+                    "   global __bootstrap__, __file__, __loader__",
+                    "   import sys, os, pkg_resources, imp" + if_dl(", dl"),
+                    "   __file__ = pkg_resources.resource_filename"
+                    "(__name__,%r)"
+                    % os.path.basename(ext._file_name),
+                    "   del __bootstrap__",
+                    "   if '__loader__' in globals():",
+                    "       del __loader__",
+                    if_dl("   old_flags = sys.getdlopenflags()"),
+                    "   old_dir = os.getcwd()",
+                    "   try:",
+                    "     os.chdir(os.path.dirname(__file__))",
+                    if_dl("     sys.setdlopenflags(dl.RTLD_NOW)"),
+                    "     imp.load_dynamic(__name__,__file__)",
+                    "   finally:",
+                    if_dl("     sys.setdlopenflags(old_flags)"),
+                    "     os.chdir(old_dir)",
+                    "__bootstrap__()",
+                    ""  # terminal \n
+                ])
+            )
+            f.close()
+        if compile:
+            from distutils.util import byte_compile
+
+            byte_compile([stub_file], optimize=0,
+                         force=True, dry_run=self.dry_run)
+            optimize = self.get_finalized_command('install_lib').optimize
+            if optimize > 0:
+                byte_compile([stub_file], optimize=optimize,
+                             force=True, dry_run=self.dry_run)
+            if os.path.exists(stub_file) and not self.dry_run:
+                os.unlink(stub_file)
+
+
+if use_stubs or os.name == 'nt':
+    # Build shared libraries
+    #
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        self.link(
+            self.SHARED_LIBRARY, objects, output_libname,
+            output_dir, libraries, library_dirs, runtime_library_dirs,
+            export_symbols, debug, extra_preargs, extra_postargs,
+            build_temp, target_lang
+        )
+else:
+    # Build static libraries everywhere else
+    libtype = 'static'
+
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        # XXX we need to either disallow these attrs on Library instances,
+        # or warn/abort here if set, or something...
+        # libraries=None, library_dirs=None, runtime_library_dirs=None,
+        # export_symbols=None, extra_preargs=None, extra_postargs=None,
+        # build_temp=None
+
+        assert output_dir is None  # distutils build_ext doesn't pass this
+        output_dir, filename = os.path.split(output_libname)
+        basename, ext = os.path.splitext(filename)
+        if self.library_filename("x").startswith('lib'):
+            # strip 'lib' prefix; this is kludgy if some platform uses
+            # a different prefix
+            basename = basename[3:]
+
+        self.create_static_lib(
+            objects, basename, output_dir, debug, target_lang
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_py.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_py.py
new file mode 100644
index 00000000..b0314fd4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/build_py.py
@@ -0,0 +1,270 @@
+from glob import glob
+from distutils.util import convert_path
+import distutils.command.build_py as orig
+import os
+import fnmatch
+import textwrap
+import io
+import distutils.errors
+import itertools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+try:
+    from setuptools.lib2to3_ex import Mixin2to3
+except ImportError:
+
+    class Mixin2to3:
+        def run_2to3(self, files, doctests=True):
+            "do nothing"
+
+
+class build_py(orig.build_py, Mixin2to3):
+    """Enhanced 'build_py' command that includes data files with packages
+
+    The data files are specified via a 'package_data' argument to 'setup()'.
+    See 'setuptools.dist.Distribution' for more details.
+
+    Also, this version of the 'build_py' command allows you to specify both
+    'py_modules' and 'packages' in the same setup operation.
+    """
+
+    def finalize_options(self):
+        orig.build_py.finalize_options(self)
+        self.package_data = self.distribution.package_data
+        self.exclude_package_data = (self.distribution.exclude_package_data or
+                                     {})
+        if 'data_files' in self.__dict__:
+            del self.__dict__['data_files']
+        self.__updated_files = []
+        self.__doctests_2to3 = []
+
+    def run(self):
+        """Build modules, packages, and copy data files to build directory"""
+        if not self.py_modules and not self.packages:
+            return
+
+        if self.py_modules:
+            self.build_modules()
+
+        if self.packages:
+            self.build_packages()
+            self.build_package_data()
+
+        self.run_2to3(self.__updated_files, False)
+        self.run_2to3(self.__updated_files, True)
+        self.run_2to3(self.__doctests_2to3, True)
+
+        # Only compile actual .py files, using our base class' idea of what our
+        # output files are.
+        self.byte_compile(orig.build_py.get_outputs(self, include_bytecode=0))
+
+    def __getattr__(self, attr):
+        "lazily compute data files"
+        if attr == 'data_files':
+            self.data_files = self._get_data_files()
+            return self.data_files
+        return orig.build_py.__getattr__(self, attr)
+
+    def build_module(self, module, module_file, package):
+        if six.PY2 and isinstance(package, six.string_types):
+            # avoid errors on Python 2 when unicode is passed (#190)
+            package = package.split('.')
+        outfile, copied = orig.build_py.build_module(self, module, module_file,
+                                                     package)
+        if copied:
+            self.__updated_files.append(outfile)
+        return outfile, copied
+
+    def _get_data_files(self):
+        """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
+        self.analyze_manifest()
+        return list(map(self._get_pkg_data_files, self.packages or ()))
+
+    def _get_pkg_data_files(self, package):
+        # Locate package source directory
+        src_dir = self.get_package_dir(package)
+
+        # Compute package build directory
+        build_dir = os.path.join(*([self.build_lib] + package.split('.')))
+
+        # Strip directory from globbed filenames
+        filenames = [
+            os.path.relpath(file, src_dir)
+            for file in self.find_data_files(package, src_dir)
+        ]
+        return package, src_dir, build_dir, filenames
+
+    def find_data_files(self, package, src_dir):
+        """Return filenames for package's data files in 'src_dir'"""
+        patterns = self._get_platform_patterns(
+            self.package_data,
+            package,
+            src_dir,
+        )
+        globs_expanded = map(glob, patterns)
+        # flatten the expanded globs into an iterable of matches
+        globs_matches = itertools.chain.from_iterable(globs_expanded)
+        glob_files = filter(os.path.isfile, globs_matches)
+        files = itertools.chain(
+            self.manifest_files.get(package, []),
+            glob_files,
+        )
+        return self.exclude_data_files(package, src_dir, files)
+
+    def build_package_data(self):
+        """Copy data files into build directory"""
+        for package, src_dir, build_dir, filenames in self.data_files:
+            for filename in filenames:
+                target = os.path.join(build_dir, filename)
+                self.mkpath(os.path.dirname(target))
+                srcfile = os.path.join(src_dir, filename)
+                outf, copied = self.copy_file(srcfile, target)
+                srcfile = os.path.abspath(srcfile)
+                if (copied and
+                        srcfile in self.distribution.convert_2to3_doctests):
+                    self.__doctests_2to3.append(outf)
+
+    def analyze_manifest(self):
+        self.manifest_files = mf = {}
+        if not self.distribution.include_package_data:
+            return
+        src_dirs = {}
+        for package in self.packages or ():
+            # Locate package source directory
+            src_dirs[assert_relative(self.get_package_dir(package))] = package
+
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        for path in ei_cmd.filelist.files:
+            d, f = os.path.split(assert_relative(path))
+            prev = None
+            oldf = f
+            while d and d != prev and d not in src_dirs:
+                prev = d
+                d, df = os.path.split(d)
+                f = os.path.join(df, f)
+            if d in src_dirs:
+                if path.endswith('.py') and f == oldf:
+                    continue  # it's a module, not data
+                mf.setdefault(src_dirs[d], []).append(path)
+
+    def get_data_files(self):
+        pass  # Lazily compute data files in _get_data_files() function.
+
+    def check_package(self, package, package_dir):
+        """Check namespace packages' __init__ for declare_namespace"""
+        try:
+            return self.packages_checked[package]
+        except KeyError:
+            pass
+
+        init_py = orig.build_py.check_package(self, package, package_dir)
+        self.packages_checked[package] = init_py
+
+        if not init_py or not self.distribution.namespace_packages:
+            return init_py
+
+        for pkg in self.distribution.namespace_packages:
+            if pkg == package or pkg.startswith(package + '.'):
+                break
+        else:
+            return init_py
+
+        with io.open(init_py, 'rb') as f:
+            contents = f.read()
+        if b'declare_namespace' not in contents:
+            raise distutils.errors.DistutilsError(
+                "Namespace package problem: %s is a namespace package, but "
+                "its\n__init__.py does not call declare_namespace()! Please "
+                'fix it.\n(See the setuptools manual under '
+                '"Namespace Packages" for details.)\n"' % (package,)
+            )
+        return init_py
+
+    def initialize_options(self):
+        self.packages_checked = {}
+        orig.build_py.initialize_options(self)
+
+    def get_package_dir(self, package):
+        res = orig.build_py.get_package_dir(self, package)
+        if self.distribution.src_root is not None:
+            return os.path.join(self.distribution.src_root, res)
+        return res
+
+    def exclude_data_files(self, package, src_dir, files):
+        """Filter filenames for package's data files in 'src_dir'"""
+        files = list(files)
+        patterns = self._get_platform_patterns(
+            self.exclude_package_data,
+            package,
+            src_dir,
+        )
+        match_groups = (
+            fnmatch.filter(files, pattern)
+            for pattern in patterns
+        )
+        # flatten the groups of matches into an iterable of matches
+        matches = itertools.chain.from_iterable(match_groups)
+        bad = set(matches)
+        keepers = (
+            fn
+            for fn in files
+            if fn not in bad
+        )
+        # ditch dupes
+        return list(_unique_everseen(keepers))
+
+    @staticmethod
+    def _get_platform_patterns(spec, package, src_dir):
+        """
+        yield platform-specific path patterns (suitable for glob
+        or fn_match) from a glob-based spec (such as
+        self.package_data or self.exclude_package_data)
+        matching package in src_dir.
+        """
+        raw_patterns = itertools.chain(
+            spec.get('', []),
+            spec.get(package, []),
+        )
+        return (
+            # Each pattern has to be converted to a platform-specific path
+            os.path.join(src_dir, convert_path(pattern))
+            for pattern in raw_patterns
+        )
+
+
+# from Python docs
+def _unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def assert_relative(path):
+    if not os.path.isabs(path):
+        return path
+    from distutils.errors import DistutilsSetupError
+
+    msg = textwrap.dedent("""
+        Error: setup script specifies an absolute path:
+
+            %s
+
+        setup() arguments must *always* be /-separated paths relative to the
+        setup.py directory, *never* absolute paths.
+        """).lstrip() % path
+    raise DistutilsSetupError(msg)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/develop.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/develop.py
new file mode 100644
index 00000000..009e4f93
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/develop.py
@@ -0,0 +1,221 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsError, DistutilsOptionError
+import os
+import glob
+import io
+
+from setuptools.extern import six
+
+import pkg_resources
+from setuptools.command.easy_install import easy_install
+from setuptools import namespaces
+import setuptools
+
+__metaclass__ = type
+
+
+class develop(namespaces.DevelopInstaller, easy_install):
+    """Set up package for development"""
+
+    description = "install package in 'development mode'"
+
+    user_options = easy_install.user_options + [
+        ("uninstall", "u", "Uninstall this source package"),
+        ("egg-path=", None, "Set the path to be used in the .egg-link file"),
+    ]
+
+    boolean_options = easy_install.boolean_options + ['uninstall']
+
+    command_consumes_arguments = False  # override base
+
+    def run(self):
+        if self.uninstall:
+            self.multi_version = True
+            self.uninstall_link()
+            self.uninstall_namespaces()
+        else:
+            self.install_for_development()
+        self.warn_deprecated_options()
+
+    def initialize_options(self):
+        self.uninstall = None
+        self.egg_path = None
+        easy_install.initialize_options(self)
+        self.setup_path = None
+        self.always_copy_from = '.'  # always copy eggs installed in curdir
+
+    def finalize_options(self):
+        ei = self.get_finalized_command("egg_info")
+        if ei.broken_egg_info:
+            template = "Please rename %r to %r before using 'develop'"
+            args = ei.egg_info, ei.broken_egg_info
+            raise DistutilsError(template % args)
+        self.args = [ei.egg_name]
+
+        easy_install.finalize_options(self)
+        self.expand_basedirs()
+        self.expand_dirs()
+        # pick up setup-dir .egg files only: no .egg-info
+        self.package_index.scan(glob.glob('*.egg'))
+
+        egg_link_fn = ei.egg_name + '.egg-link'
+        self.egg_link = os.path.join(self.install_dir, egg_link_fn)
+        self.egg_base = ei.egg_base
+        if self.egg_path is None:
+            self.egg_path = os.path.abspath(ei.egg_base)
+
+        target = pkg_resources.normalize_path(self.egg_base)
+        egg_path = pkg_resources.normalize_path(
+            os.path.join(self.install_dir, self.egg_path))
+        if egg_path != target:
+            raise DistutilsOptionError(
+                "--egg-path must be a relative path from the install"
+                " directory to " + target
+            )
+
+        # Make a distribution for the package's source
+        self.dist = pkg_resources.Distribution(
+            target,
+            pkg_resources.PathMetadata(target, os.path.abspath(ei.egg_info)),
+            project_name=ei.egg_name
+        )
+
+        self.setup_path = self._resolve_setup_path(
+            self.egg_base,
+            self.install_dir,
+            self.egg_path,
+        )
+
+    @staticmethod
+    def _resolve_setup_path(egg_base, install_dir, egg_path):
+        """
+        Generate a path from egg_base back to '.' where the
+        setup script resides and ensure that path points to the
+        setup path from $install_dir/$egg_path.
+        """
+        path_to_setup = egg_base.replace(os.sep, '/').rstrip('/')
+        if path_to_setup != os.curdir:
+            path_to_setup = '../' * (path_to_setup.count('/') + 1)
+        resolved = pkg_resources.normalize_path(
+            os.path.join(install_dir, egg_path, path_to_setup)
+        )
+        if resolved != pkg_resources.normalize_path(os.curdir):
+            raise DistutilsOptionError(
+                "Can't get a consistent path to setup script from"
+                " installation directory", resolved,
+                pkg_resources.normalize_path(os.curdir))
+        return path_to_setup
+
+    def install_for_development(self):
+        if six.PY3 and getattr(self.distribution, 'use_2to3', False):
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = pkg_resources.normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+
+            # Fixup egg-link and easy-install.pth
+            ei_cmd = self.get_finalized_command("egg_info")
+            self.egg_path = build_path
+            self.dist.location = build_path
+            # XXX
+            self.dist._provider = pkg_resources.PathMetadata(
+                build_path, ei_cmd.egg_info)
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        self.install_site_py()  # ensure that target dir is site-safe
+        if setuptools.bootstrap_install_from:
+            self.easy_install(setuptools.bootstrap_install_from)
+            setuptools.bootstrap_install_from = None
+
+        self.install_namespaces()
+
+        # create an .egg-link in the installation dir, pointing to our egg
+        log.info("Creating %s (link to %s)", self.egg_link, self.egg_base)
+        if not self.dry_run:
+            with open(self.egg_link, "w") as f:
+                f.write(self.egg_path + "\n" + self.setup_path)
+        # postprocess the installed distro, fixing up .pth, installing scripts,
+        # and handling requirements
+        self.process_distribution(None, self.dist, not self.no_deps)
+
+    def uninstall_link(self):
+        if os.path.exists(self.egg_link):
+            log.info("Removing %s (link to %s)", self.egg_link, self.egg_base)
+            egg_link_file = open(self.egg_link)
+            contents = [line.rstrip() for line in egg_link_file]
+            egg_link_file.close()
+            if contents not in ([self.egg_path],
+                                [self.egg_path, self.setup_path]):
+                log.warn("Link points to %s: uninstall aborted", contents)
+                return
+            if not self.dry_run:
+                os.unlink(self.egg_link)
+        if not self.dry_run:
+            self.update_pth(self.dist)  # remove any .pth link to us
+        if self.distribution.scripts:
+            # XXX should also check for entry point scripts!
+            log.warn("Note: you must uninstall or replace scripts manually!")
+
+    def install_egg_scripts(self, dist):
+        if dist is not self.dist:
+            # Installing a dependency, so fall back to normal behavior
+            return easy_install.install_egg_scripts(self, dist)
+
+        # create wrapper scripts in the script dir, pointing to dist.scripts
+
+        # new-style...
+        self.install_wrapper_scripts(dist)
+
+        # ...and old-style
+        for script_name in self.distribution.scripts or []:
+            script_path = os.path.abspath(convert_path(script_name))
+            script_name = os.path.basename(script_path)
+            with io.open(script_path) as strm:
+                script_text = strm.read()
+            self.install_script(dist, script_name, script_text, script_path)
+
+    def install_wrapper_scripts(self, dist):
+        dist = VersionlessRequirement(dist)
+        return easy_install.install_wrapper_scripts(self, dist)
+
+
+class VersionlessRequirement:
+    """
+    Adapt a pkg_resources.Distribution to simply return the project
+    name as the 'requirement' so that scripts will work across
+    multiple versions.
+
+    >>> from pkg_resources import Distribution
+    >>> dist = Distribution(project_name='foo', version='1.0')
+    >>> str(dist.as_requirement())
+    'foo==1.0'
+    >>> adapted_dist = VersionlessRequirement(dist)
+    >>> str(adapted_dist.as_requirement())
+    'foo'
+    """
+
+    def __init__(self, dist):
+        self.__dist = dist
+
+    def __getattr__(self, name):
+        return getattr(self.__dist, name)
+
+    def as_requirement(self):
+        return self.project_name
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/dist_info.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/dist_info.py
new file mode 100644
index 00000000..c45258fa
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/dist_info.py
@@ -0,0 +1,36 @@
+"""
+Create a dist_info directory
+As defined in the wheel specification
+"""
+
+import os
+
+from distutils.core import Command
+from distutils import log
+
+
+class dist_info(Command):
+
+    description = 'create a .dist-info directory'
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+    ]
+
+    def initialize_options(self):
+        self.egg_base = None
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        egg_info = self.get_finalized_command('egg_info')
+        egg_info.egg_base = self.egg_base
+        egg_info.finalize_options()
+        egg_info.run()
+        dist_info_dir = egg_info.egg_info[:-len('.egg-info')] + '.dist-info'
+        log.info("creating '{}'".format(os.path.abspath(dist_info_dir)))
+
+        bdist_wheel = self.get_finalized_command('bdist_wheel')
+        bdist_wheel.egg2dist(egg_info.egg_info, dist_info_dir)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/easy_install.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/easy_install.py
new file mode 100644
index 00000000..06c98271
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/easy_install.py
@@ -0,0 +1,2342 @@
+#!/usr/bin/env python
+"""
+Easy Install
+------------
+
+A tool for doing automatic download/extract/build of distutils-based Python
+packages.  For detailed documentation, see the accompanying EasyInstall.txt
+file, or visit the `EasyInstall home page`__.
+
+__ https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+"""
+
+from glob import glob
+from distutils.util import get_platform
+from distutils.util import convert_path, subst_vars
+from distutils.errors import (
+    DistutilsArgError, DistutilsOptionError,
+    DistutilsError, DistutilsPlatformError,
+)
+from distutils.command.install import INSTALL_SCHEMES, SCHEME_KEYS
+from distutils import log, dir_util
+from distutils.command.build_scripts import first_line_re
+from distutils.spawn import find_executable
+import sys
+import os
+import zipimport
+import shutil
+import tempfile
+import zipfile
+import re
+import stat
+import random
+import textwrap
+import warnings
+import site
+import struct
+import contextlib
+import subprocess
+import shlex
+import io
+
+
+from sysconfig import get_config_vars, get_path
+
+from setuptools import SetuptoolsDeprecationWarning
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import configparser, map
+
+from setuptools import Command
+from setuptools.sandbox import run_setup
+from setuptools.py27compat import rmtree_safe
+from setuptools.command import setopt
+from setuptools.archive_util import unpack_archive
+from setuptools.package_index import (
+    PackageIndex, parse_requirement_arg, URL_SCHEME,
+)
+from setuptools.command import bdist_egg, egg_info
+from setuptools.wheel import Wheel
+from pkg_resources import (
+    yield_lines, normalize_path, resource_string, ensure_directory,
+    get_distribution, find_distributions, Environment, Requirement,
+    Distribution, PathMetadata, EggMetadata, WorkingSet, DistributionNotFound,
+    VersionConflict, DEVELOP_DIST,
+)
+import pkg_resources.py31compat
+
+__metaclass__ = type
+
+# Turn on PEP440Warnings
+warnings.filterwarnings("default", category=pkg_resources.PEP440Warning)
+
+__all__ = [
+    'samefile', 'easy_install', 'PthDistributions', 'extract_wininst_cfg',
+    'main', 'get_exe_prefixes',
+]
+
+
+def is_64bit():
+    return struct.calcsize("P") == 8
+
+
+def samefile(p1, p2):
+    """
+    Determine if two paths reference the same file.
+
+    Augments os.path.samefile to work on Windows and
+    suppresses errors if the path doesn't exist.
+    """
+    both_exist = os.path.exists(p1) and os.path.exists(p2)
+    use_samefile = hasattr(os.path, 'samefile') and both_exist
+    if use_samefile:
+        return os.path.samefile(p1, p2)
+    norm_p1 = os.path.normpath(os.path.normcase(p1))
+    norm_p2 = os.path.normpath(os.path.normcase(p2))
+    return norm_p1 == norm_p2
+
+
+if six.PY2:
+
+    def _to_bytes(s):
+        return s
+
+    def isascii(s):
+        try:
+            six.text_type(s, 'ascii')
+            return True
+        except UnicodeError:
+            return False
+else:
+
+    def _to_bytes(s):
+        return s.encode('utf8')
+
+    def isascii(s):
+        try:
+            s.encode('ascii')
+            return True
+        except UnicodeError:
+            return False
+
+
+_one_liner = lambda text: textwrap.dedent(text).strip().replace('\n', '; ')
+
+
+class easy_install(Command):
+    """Manage a download/build/install process"""
+    description = "Find/get/install Python packages"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('prefix=', None, "installation prefix"),
+        ("zip-ok", "z", "install package as a zipfile"),
+        ("multi-version", "m", "make apps have to require() a version"),
+        ("upgrade", "U", "force upgrade (searches PyPI for latest versions)"),
+        ("install-dir=", "d", "install package to DIR"),
+        ("script-dir=", "s", "install scripts to DIR"),
+        ("exclude-scripts", "x", "Don't install scripts"),
+        ("always-copy", "a", "Copy all needed packages to install dir"),
+        ("index-url=", "i", "base URL of Python Package Index"),
+        ("find-links=", "f", "additional URL(s) to search for packages"),
+        ("build-directory=", "b",
+         "download/extract/build in DIR; keep the results"),
+        ('optimize=', 'O',
+         "also compile with optimization: -O1 for \"python -O\", "
+         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
+        ('record=', None,
+         "filename in which to record list of installed files"),
+        ('always-unzip', 'Z', "don't install as a zipfile, no matter what"),
+        ('site-dirs=', 'S', "list of directories where .pth files work"),
+        ('editable', 'e', "Install specified packages in editable form"),
+        ('no-deps', 'N', "don't install dependencies"),
+        ('allow-hosts=', 'H', "pattern(s) that hostnames must match"),
+        ('local-snapshots-ok', 'l',
+         "allow building eggs from local checkouts"),
+        ('version', None, "print version information and exit"),
+        ('no-find-links', None,
+         "Don't load find-links defined in packages being installed")
+    ]
+    boolean_options = [
+        'zip-ok', 'multi-version', 'exclude-scripts', 'upgrade', 'always-copy',
+        'editable',
+        'no-deps', 'local-snapshots-ok', 'version'
+    ]
+
+    if site.ENABLE_USER_SITE:
+        help_msg = "install in user site-package '%s'" % site.USER_SITE
+        user_options.append(('user', None, help_msg))
+        boolean_options.append('user')
+
+    negative_opt = {'always-unzip': 'zip-ok'}
+    create_index = PackageIndex
+
+    def initialize_options(self):
+        # the --user option seems to be an opt-in one,
+        # so the default should be False.
+        self.user = 0
+        self.zip_ok = self.local_snapshots_ok = None
+        self.install_dir = self.script_dir = self.exclude_scripts = None
+        self.index_url = None
+        self.find_links = None
+        self.build_directory = None
+        self.args = None
+        self.optimize = self.record = None
+        self.upgrade = self.always_copy = self.multi_version = None
+        self.editable = self.no_deps = self.allow_hosts = None
+        self.root = self.prefix = self.no_report = None
+        self.version = None
+        self.install_purelib = None  # for pure module distributions
+        self.install_platlib = None  # non-pure (dists w/ extensions)
+        self.install_headers = None  # for C/C++ headers
+        self.install_lib = None  # set to either purelib or platlib
+        self.install_scripts = None
+        self.install_data = None
+        self.install_base = None
+        self.install_platbase = None
+        if site.ENABLE_USER_SITE:
+            self.install_userbase = site.USER_BASE
+            self.install_usersite = site.USER_SITE
+        else:
+            self.install_userbase = None
+            self.install_usersite = None
+        self.no_find_links = None
+
+        # Options not specifiable via command line
+        self.package_index = None
+        self.pth_file = self.always_copy_from = None
+        self.site_dirs = None
+        self.installed_projects = {}
+        self.sitepy_installed = False
+        # Always read easy_install options, even if we are subclassed, or have
+        # an independent instance created.  This ensures that defaults will
+        # always come from the standard configuration file(s)' "easy_install"
+        # section, even if this is a "develop" or "install" command, or some
+        # other embedding.
+        self._dry_run = None
+        self.verbose = self.distribution.verbose
+        self.distribution._set_command_options(
+            self, self.distribution.get_option_dict('easy_install')
+        )
+
+    def delete_blockers(self, blockers):
+        extant_blockers = (
+            filename for filename in blockers
+            if os.path.exists(filename) or os.path.islink(filename)
+        )
+        list(map(self._delete_path, extant_blockers))
+
+    def _delete_path(self, path):
+        log.info("Deleting %s", path)
+        if self.dry_run:
+            return
+
+        is_tree = os.path.isdir(path) and not os.path.islink(path)
+        remover = rmtree if is_tree else os.unlink
+        remover(path)
+
+    @staticmethod
+    def _render_version():
+        """
+        Render the Setuptools version and installation details, then exit.
+        """
+        ver = sys.version[:3]
+        dist = get_distribution('setuptools')
+        tmpl = 'setuptools {dist.version} from {dist.location} (Python {ver})'
+        print(tmpl.format(**locals()))
+        raise SystemExit()
+
+    def finalize_options(self):
+        self.version and self._render_version()
+
+        py_version = sys.version.split()[0]
+        prefix, exec_prefix = get_config_vars('prefix', 'exec_prefix')
+
+        self.config_vars = {
+            'dist_name': self.distribution.get_name(),
+            'dist_version': self.distribution.get_version(),
+            'dist_fullname': self.distribution.get_fullname(),
+            'py_version': py_version,
+            'py_version_short': py_version[0:3],
+            'py_version_nodot': py_version[0] + py_version[2],
+            'sys_prefix': prefix,
+            'prefix': prefix,
+            'sys_exec_prefix': exec_prefix,
+            'exec_prefix': exec_prefix,
+            # Only python 3.2+ has abiflags
+            'abiflags': getattr(sys, 'abiflags', ''),
+        }
+
+        if site.ENABLE_USER_SITE:
+            self.config_vars['userbase'] = self.install_userbase
+            self.config_vars['usersite'] = self.install_usersite
+
+        self._fix_install_dir_for_user_site()
+
+        self.expand_basedirs()
+        self.expand_dirs()
+
+        self._expand(
+            'install_dir', 'script_dir', 'build_directory',
+            'site_dirs',
+        )
+        # If a non-default installation directory was specified, default the
+        # script directory to match it.
+        if self.script_dir is None:
+            self.script_dir = self.install_dir
+
+        if self.no_find_links is None:
+            self.no_find_links = False
+
+        # Let install_dir get set by install_lib command, which in turn
+        # gets its info from the install command, and takes into account
+        # --prefix and --home and all that other crud.
+        self.set_undefined_options(
+            'install_lib', ('install_dir', 'install_dir')
+        )
+        # Likewise, set default script_dir from 'install_scripts.install_dir'
+        self.set_undefined_options(
+            'install_scripts', ('install_dir', 'script_dir')
+        )
+
+        if self.user and self.install_purelib:
+            self.install_dir = self.install_purelib
+            self.script_dir = self.install_scripts
+        # default --record from the install command
+        self.set_undefined_options('install', ('record', 'record'))
+        # Should this be moved to the if statement below? It's not used
+        # elsewhere
+        normpath = map(normalize_path, sys.path)
+        self.all_site_dirs = get_site_dirs()
+        if self.site_dirs is not None:
+            site_dirs = [
+                os.path.expanduser(s.strip()) for s in
+                self.site_dirs.split(',')
+            ]
+            for d in site_dirs:
+                if not os.path.isdir(d):
+                    log.warn("%s (in --site-dirs) does not exist", d)
+                elif normalize_path(d) not in normpath:
+                    raise DistutilsOptionError(
+                        d + " (in --site-dirs) is not on sys.path"
+                    )
+                else:
+                    self.all_site_dirs.append(normalize_path(d))
+        if not self.editable:
+            self.check_site_dir()
+        self.index_url = self.index_url or "https://pypi.org/simple/"
+        self.shadow_path = self.all_site_dirs[:]
+        for path_item in self.install_dir, normalize_path(self.script_dir):
+            if path_item not in self.shadow_path:
+                self.shadow_path.insert(0, path_item)
+
+        if self.allow_hosts is not None:
+            hosts = [s.strip() for s in self.allow_hosts.split(',')]
+        else:
+            hosts = ['*']
+        if self.package_index is None:
+            self.package_index = self.create_index(
+                self.index_url, search_path=self.shadow_path, hosts=hosts,
+            )
+        self.local_index = Environment(self.shadow_path + sys.path)
+
+        if self.find_links is not None:
+            if isinstance(self.find_links, six.string_types):
+                self.find_links = self.find_links.split()
+        else:
+            self.find_links = []
+        if self.local_snapshots_ok:
+            self.package_index.scan_egg_links(self.shadow_path + sys.path)
+        if not self.no_find_links:
+            self.package_index.add_find_links(self.find_links)
+        self.set_undefined_options('install_lib', ('optimize', 'optimize'))
+        if not isinstance(self.optimize, int):
+            try:
+                self.optimize = int(self.optimize)
+                if not (0 <= self.optimize <= 2):
+                    raise ValueError
+            except ValueError:
+                raise DistutilsOptionError("--optimize must be 0, 1, or 2")
+
+        if self.editable and not self.build_directory:
+            raise DistutilsArgError(
+                "Must specify a build directory (-b) when using --editable"
+            )
+        if not self.args:
+            raise DistutilsArgError(
+                "No urls, filenames, or requirements specified (see --help)")
+
+        self.outputs = []
+
+    def _fix_install_dir_for_user_site(self):
+        """
+        Fix the install_dir if "--user" was used.
+        """
+        if not self.user or not site.ENABLE_USER_SITE:
+            return
+
+        self.create_home_path()
+        if self.install_userbase is None:
+            msg = "User base directory is not specified"
+            raise DistutilsPlatformError(msg)
+        self.install_base = self.install_platbase = self.install_userbase
+        scheme_name = os.name.replace('posix', 'unix') + '_user'
+        self.select_scheme(scheme_name)
+
+    def _expand_attrs(self, attrs):
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                if os.name == 'posix' or os.name == 'nt':
+                    val = os.path.expanduser(val)
+                val = subst_vars(val, self.config_vars)
+                setattr(self, attr, val)
+
+    def expand_basedirs(self):
+        """Calls `os.path.expanduser` on install_base, install_platbase and
+        root."""
+        self._expand_attrs(['install_base', 'install_platbase', 'root'])
+
+    def expand_dirs(self):
+        """Calls `os.path.expanduser` on install dirs."""
+        dirs = [
+            'install_purelib',
+            'install_platlib',
+            'install_lib',
+            'install_headers',
+            'install_scripts',
+            'install_data',
+        ]
+        self._expand_attrs(dirs)
+
+    def run(self):
+        if self.verbose != self.distribution.verbose:
+            log.set_verbosity(self.verbose)
+        try:
+            for spec in self.args:
+                self.easy_install(spec, not self.no_deps)
+            if self.record:
+                outputs = self.outputs
+                if self.root:  # strip any package prefix
+                    root_len = len(self.root)
+                    for counter in range(len(outputs)):
+                        outputs[counter] = outputs[counter][root_len:]
+                from distutils import file_util
+
+                self.execute(
+                    file_util.write_file, (self.record, outputs),
+                    "writing list of installed files to '%s'" %
+                    self.record
+                )
+            self.warn_deprecated_options()
+        finally:
+            log.set_verbosity(self.distribution.verbose)
+
+    def pseudo_tempname(self):
+        """Return a pseudo-tempname base in the install directory.
+        This code is intentionally naive; if a malicious party can write to
+        the target directory you're already in deep doodoo.
+        """
+        try:
+            pid = os.getpid()
+        except Exception:
+            pid = random.randint(0, sys.maxsize)
+        return os.path.join(self.install_dir, "test-easy-install-%s" % pid)
+
+    def warn_deprecated_options(self):
+        pass
+
+    def check_site_dir(self):
+        """Verify that self.install_dir is .pth-capable dir, if needed"""
+
+        instdir = normalize_path(self.install_dir)
+        pth_file = os.path.join(instdir, 'easy-install.pth')
+
+        # Is it a configured, PYTHONPATH, implicit, or explicit site dir?
+        is_site_dir = instdir in self.all_site_dirs
+
+        if not is_site_dir and not self.multi_version:
+            # No?  Then directly test whether it does .pth file processing
+            is_site_dir = self.check_pth_processing()
+        else:
+            # make sure we can write to target dir
+            testfile = self.pseudo_tempname() + '.write-test'
+            test_exists = os.path.exists(testfile)
+            try:
+                if test_exists:
+                    os.unlink(testfile)
+                open(testfile, 'w').close()
+                os.unlink(testfile)
+            except (OSError, IOError):
+                self.cant_write_to_target()
+
+        if not is_site_dir and not self.multi_version:
+            # Can't install non-multi to non-site dir
+            raise DistutilsError(self.no_default_version_msg())
+
+        if is_site_dir:
+            if self.pth_file is None:
+                self.pth_file = PthDistributions(pth_file, self.all_site_dirs)
+        else:
+            self.pth_file = None
+
+        if instdir not in map(normalize_path, _pythonpath()):
+            # only PYTHONPATH dirs need a site.py, so pretend it's there
+            self.sitepy_installed = True
+        elif self.multi_version and not os.path.exists(pth_file):
+            self.sitepy_installed = True  # don't need site.py in this case
+            self.pth_file = None  # and don't create a .pth file
+        self.install_dir = instdir
+
+    __cant_write_msg = textwrap.dedent("""
+        can't create or remove files in install directory
+
+        The following error occurred while trying to add or remove files in the
+        installation directory:
+
+            %s
+
+        The installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+        """).lstrip()
+
+    __not_exists_id = textwrap.dedent("""
+        This directory does not currently exist.  Please create it and try again, or
+        choose a different installation directory (using the -d or --install-dir
+        option).
+        """).lstrip()
+
+    __access_msg = textwrap.dedent("""
+        Perhaps your account does not have write access to this directory?  If the
+        installation directory is a system-owned directory, you may need to sign in
+        as the administrator or "root" account.  If you do not have administrative
+        access to this machine, you may wish to choose a different installation
+        directory, preferably one that is listed in your PYTHONPATH environment
+        variable.
+
+        For information on other options, you may wish to consult the
+        documentation at:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+        Please make the appropriate changes for your system and try again.
+        """).lstrip()
+
+    def cant_write_to_target(self):
+        msg = self.__cant_write_msg % (sys.exc_info()[1], self.install_dir,)
+
+        if not os.path.exists(self.install_dir):
+            msg += '\n' + self.__not_exists_id
+        else:
+            msg += '\n' + self.__access_msg
+        raise DistutilsError(msg)
+
+    def check_pth_processing(self):
+        """Empirically verify whether .pth files are supported in inst. dir"""
+        instdir = self.install_dir
+        log.info("Checking .pth file support in %s", instdir)
+        pth_file = self.pseudo_tempname() + ".pth"
+        ok_file = pth_file + '.ok'
+        ok_exists = os.path.exists(ok_file)
+        tmpl = _one_liner("""
+            import os
+            f = open({ok_file!r}, 'w')
+            f.write('OK')
+            f.close()
+            """) + '\n'
+        try:
+            if ok_exists:
+                os.unlink(ok_file)
+            dirname = os.path.dirname(ok_file)
+            pkg_resources.py31compat.makedirs(dirname, exist_ok=True)
+            f = open(pth_file, 'w')
+        except (OSError, IOError):
+            self.cant_write_to_target()
+        else:
+            try:
+                f.write(tmpl.format(**locals()))
+                f.close()
+                f = None
+                executable = sys.executable
+                if os.name == 'nt':
+                    dirname, basename = os.path.split(executable)
+                    alt = os.path.join(dirname, 'pythonw.exe')
+                    use_alt = (
+                        basename.lower() == 'python.exe' and
+                        os.path.exists(alt)
+                    )
+                    if use_alt:
+                        # use pythonw.exe to avoid opening a console window
+                        executable = alt
+
+                from distutils.spawn import spawn
+
+                spawn([executable, '-E', '-c', 'pass'], 0)
+
+                if os.path.exists(ok_file):
+                    log.info(
+                        "TEST PASSED: %s appears to support .pth files",
+                        instdir
+                    )
+                    return True
+            finally:
+                if f:
+                    f.close()
+                if os.path.exists(ok_file):
+                    os.unlink(ok_file)
+                if os.path.exists(pth_file):
+                    os.unlink(pth_file)
+        if not self.multi_version:
+            log.warn("TEST FAILED: %s does NOT support .pth files", instdir)
+        return False
+
+    def install_egg_scripts(self, dist):
+        """Write all the scripts for `dist`, unless scripts are excluded"""
+        if not self.exclude_scripts and dist.metadata_isdir('scripts'):
+            for script_name in dist.metadata_listdir('scripts'):
+                if dist.metadata_isdir('scripts/' + script_name):
+                    # The "script" is a directory, likely a Python 3
+                    # __pycache__ directory, so skip it.
+                    continue
+                self.install_script(
+                    dist, script_name,
+                    dist.get_metadata('scripts/' + script_name)
+                )
+        self.install_wrapper_scripts(dist)
+
+    def add_output(self, path):
+        if os.path.isdir(path):
+            for base, dirs, files in os.walk(path):
+                for filename in files:
+                    self.outputs.append(os.path.join(base, filename))
+        else:
+            self.outputs.append(path)
+
+    def not_editable(self, spec):
+        if self.editable:
+            raise DistutilsArgError(
+                "Invalid argument %r: you can't use filenames or URLs "
+                "with --editable (except via the --find-links option)."
+                % (spec,)
+            )
+
+    def check_editable(self, spec):
+        if not self.editable:
+            return
+
+        if os.path.exists(os.path.join(self.build_directory, spec.key)):
+            raise DistutilsArgError(
+                "%r already exists in %s; can't do a checkout there" %
+                (spec.key, self.build_directory)
+            )
+
+    @contextlib.contextmanager
+    def _tmpdir(self):
+        tmpdir = tempfile.mkdtemp(prefix=u"easy_install-")
+        try:
+            # cast to str as workaround for #709 and #710 and #712
+            yield str(tmpdir)
+        finally:
+            os.path.exists(tmpdir) and rmtree(rmtree_safe(tmpdir))
+
+    def easy_install(self, spec, deps=False):
+        if not self.editable:
+            self.install_site_py()
+
+        with self._tmpdir() as tmpdir:
+            if not isinstance(spec, Requirement):
+                if URL_SCHEME(spec):
+                    # It's a url, download it to tmpdir and process
+                    self.not_editable(spec)
+                    dl = self.package_index.download(spec, tmpdir)
+                    return self.install_item(None, dl, tmpdir, deps, True)
+
+                elif os.path.exists(spec):
+                    # Existing file or directory, just process it directly
+                    self.not_editable(spec)
+                    return self.install_item(None, spec, tmpdir, deps, True)
+                else:
+                    spec = parse_requirement_arg(spec)
+
+            self.check_editable(spec)
+            dist = self.package_index.fetch_distribution(
+                spec, tmpdir, self.upgrade, self.editable,
+                not self.always_copy, self.local_index
+            )
+            if dist is None:
+                msg = "Could not find suitable distribution for %r" % spec
+                if self.always_copy:
+                    msg += " (--always-copy skips system and development eggs)"
+                raise DistutilsError(msg)
+            elif dist.precedence == DEVELOP_DIST:
+                # .egg-info dists don't need installing, just process deps
+                self.process_distribution(spec, dist, deps, "Using")
+                return dist
+            else:
+                return self.install_item(spec, dist.location, tmpdir, deps)
+
+    def install_item(self, spec, download, tmpdir, deps, install_needed=False):
+
+        # Installation is also needed if file in tmpdir or is not an egg
+        install_needed = install_needed or self.always_copy
+        install_needed = install_needed or os.path.dirname(download) == tmpdir
+        install_needed = install_needed or not download.endswith('.egg')
+        install_needed = install_needed or (
+            self.always_copy_from is not None and
+            os.path.dirname(normalize_path(download)) ==
+            normalize_path(self.always_copy_from)
+        )
+
+        if spec and not install_needed:
+            # at this point, we know it's a local .egg, we just don't know if
+            # it's already installed.
+            for dist in self.local_index[spec.project_name]:
+                if dist.location == download:
+                    break
+            else:
+                install_needed = True  # it's not in the local index
+
+        log.info("Processing %s", os.path.basename(download))
+
+        if install_needed:
+            dists = self.install_eggs(spec, download, tmpdir)
+            for dist in dists:
+                self.process_distribution(spec, dist, deps)
+        else:
+            dists = [self.egg_distribution(download)]
+            self.process_distribution(spec, dists[0], deps, "Using")
+
+        if spec is not None:
+            for dist in dists:
+                if dist in spec:
+                    return dist
+
+    def select_scheme(self, name):
+        """Sets the install directories by applying the install schemes."""
+        # it's the caller's problem if they supply a bad name!
+        scheme = INSTALL_SCHEMES[name]
+        for key in SCHEME_KEYS:
+            attrname = 'install_' + key
+            if getattr(self, attrname) is None:
+                setattr(self, attrname, scheme[key])
+
+    def process_distribution(self, requirement, dist, deps=True, *info):
+        self.update_pth(dist)
+        self.package_index.add(dist)
+        if dist in self.local_index[dist.key]:
+            self.local_index.remove(dist)
+        self.local_index.add(dist)
+        self.install_egg_scripts(dist)
+        self.installed_projects[dist.key] = dist
+        log.info(self.installation_report(requirement, dist, *info))
+        if (dist.has_metadata('dependency_links.txt') and
+                not self.no_find_links):
+            self.package_index.add_find_links(
+                dist.get_metadata_lines('dependency_links.txt')
+            )
+        if not deps and not self.always_copy:
+            return
+        elif requirement is not None and dist.key != requirement.key:
+            log.warn("Skipping dependencies for %s", dist)
+            return  # XXX this is not the distribution we were looking for
+        elif requirement is None or dist not in requirement:
+            # if we wound up with a different version, resolve what we've got
+            distreq = dist.as_requirement()
+            requirement = Requirement(str(distreq))
+        log.info("Processing dependencies for %s", requirement)
+        try:
+            distros = WorkingSet([]).resolve(
+                [requirement], self.local_index, self.easy_install
+            )
+        except DistributionNotFound as e:
+            raise DistutilsError(str(e))
+        except VersionConflict as e:
+            raise DistutilsError(e.report())
+        if self.always_copy or self.always_copy_from:
+            # Force all the relevant distros to be copied or activated
+            for dist in distros:
+                if dist.key not in self.installed_projects:
+                    self.easy_install(dist.as_requirement())
+        log.info("Finished processing dependencies for %s", requirement)
+
+    def should_unzip(self, dist):
+        if self.zip_ok is not None:
+            return not self.zip_ok
+        if dist.has_metadata('not-zip-safe'):
+            return True
+        if not dist.has_metadata('zip-safe'):
+            return True
+        return False
+
+    def maybe_move(self, spec, dist_filename, setup_base):
+        dst = os.path.join(self.build_directory, spec.key)
+        if os.path.exists(dst):
+            msg = (
+                "%r already exists in %s; build directory %s will not be kept"
+            )
+            log.warn(msg, spec.key, self.build_directory, setup_base)
+            return setup_base
+        if os.path.isdir(dist_filename):
+            setup_base = dist_filename
+        else:
+            if os.path.dirname(dist_filename) == setup_base:
+                os.unlink(dist_filename)  # get it out of the tmp dir
+            contents = os.listdir(setup_base)
+            if len(contents) == 1:
+                dist_filename = os.path.join(setup_base, contents[0])
+                if os.path.isdir(dist_filename):
+                    # if the only thing there is a directory, move it instead
+                    setup_base = dist_filename
+        ensure_directory(dst)
+        shutil.move(setup_base, dst)
+        return dst
+
+    def install_wrapper_scripts(self, dist):
+        if self.exclude_scripts:
+            return
+        for args in ScriptWriter.best().get_args(dist):
+            self.write_script(*args)
+
+    def install_script(self, dist, script_name, script_text, dev_path=None):
+        """Generate a legacy script wrapper and install it"""
+        spec = str(dist.as_requirement())
+        is_script = is_python_script(script_text, script_name)
+
+        if is_script:
+            body = self._load_template(dev_path) % locals()
+            script_text = ScriptWriter.get_header(script_text) + body
+        self.write_script(script_name, _to_bytes(script_text), 'b')
+
+    @staticmethod
+    def _load_template(dev_path):
+        """
+        There are a couple of template scripts in the package. This
+        function loads one of them and prepares it for use.
+        """
+        # See https://github.com/pypa/setuptools/issues/134 for info
+        # on script file naming and downstream issues with SVR4
+        name = 'script.tmpl'
+        if dev_path:
+            name = name.replace('.tmpl', ' (dev).tmpl')
+
+        raw_bytes = resource_string('setuptools', name)
+        return raw_bytes.decode('utf-8')
+
+    def write_script(self, script_name, contents, mode="t", blockers=()):
+        """Write an executable file to the scripts directory"""
+        self.delete_blockers(  # clean up old .py/.pyw w/o a script
+            [os.path.join(self.script_dir, x) for x in blockers]
+        )
+        log.info("Installing %s script to %s", script_name, self.script_dir)
+        target = os.path.join(self.script_dir, script_name)
+        self.add_output(target)
+
+        if self.dry_run:
+            return
+
+        mask = current_umask()
+        ensure_directory(target)
+        if os.path.exists(target):
+            os.unlink(target)
+        with open(target, "w" + mode) as f:
+            f.write(contents)
+        chmod(target, 0o777 - mask)
+
+    def install_eggs(self, spec, dist_filename, tmpdir):
+        # .egg dirs or files are already built, so just return them
+        if dist_filename.lower().endswith('.egg'):
+            return [self.install_egg(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.exe'):
+            return [self.install_exe(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.whl'):
+            return [self.install_wheel(dist_filename, tmpdir)]
+
+        # Anything else, try to extract and build
+        setup_base = tmpdir
+        if os.path.isfile(dist_filename) and not dist_filename.endswith('.py'):
+            unpack_archive(dist_filename, tmpdir, self.unpack_progress)
+        elif os.path.isdir(dist_filename):
+            setup_base = os.path.abspath(dist_filename)
+
+        if (setup_base.startswith(tmpdir)  # something we downloaded
+                and self.build_directory and spec is not None):
+            setup_base = self.maybe_move(spec, dist_filename, setup_base)
+
+        # Find the setup.py file
+        setup_script = os.path.join(setup_base, 'setup.py')
+
+        if not os.path.exists(setup_script):
+            setups = glob(os.path.join(setup_base, '*', 'setup.py'))
+            if not setups:
+                raise DistutilsError(
+                    "Couldn't find a setup script in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            if len(setups) > 1:
+                raise DistutilsError(
+                    "Multiple setup scripts in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            setup_script = setups[0]
+
+        # Now run it, and return the result
+        if self.editable:
+            log.info(self.report_editable(spec, setup_script))
+            return []
+        else:
+            return self.build_and_install(setup_script, setup_base)
+
+    def egg_distribution(self, egg_path):
+        if os.path.isdir(egg_path):
+            metadata = PathMetadata(egg_path, os.path.join(egg_path,
+                                                           'EGG-INFO'))
+        else:
+            metadata = EggMetadata(zipimport.zipimporter(egg_path))
+        return Distribution.from_filename(egg_path, metadata=metadata)
+
+    def install_egg(self, egg_path, tmpdir):
+        destination = os.path.join(
+            self.install_dir,
+            os.path.basename(egg_path),
+        )
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+
+        dist = self.egg_distribution(egg_path)
+        if not samefile(egg_path, destination):
+            if os.path.isdir(destination) and not os.path.islink(destination):
+                dir_util.remove_tree(destination, dry_run=self.dry_run)
+            elif os.path.exists(destination):
+                self.execute(
+                    os.unlink,
+                    (destination,),
+                    "Removing " + destination,
+                )
+            try:
+                new_dist_is_zipped = False
+                if os.path.isdir(egg_path):
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copytree, "Copying"
+                elif self.should_unzip(dist):
+                    self.mkpath(destination)
+                    f, m = self.unpack_and_compile, "Extracting"
+                else:
+                    new_dist_is_zipped = True
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copy2, "Copying"
+                self.execute(
+                    f,
+                    (egg_path, destination),
+                    (m + " %s to %s") % (
+                        os.path.basename(egg_path),
+                        os.path.dirname(destination)
+                    ),
+                )
+                update_dist_caches(
+                    destination,
+                    fix_zipimporter_caches=new_dist_is_zipped,
+                )
+            except Exception:
+                update_dist_caches(destination, fix_zipimporter_caches=False)
+                raise
+
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    def install_exe(self, dist_filename, tmpdir):
+        # See if it's valid, get data
+        cfg = extract_wininst_cfg(dist_filename)
+        if cfg is None:
+            raise DistutilsError(
+                "%s is not a valid distutils Windows .exe" % dist_filename
+            )
+        # Create a dummy distribution object until we build the real distro
+        dist = Distribution(
+            None,
+            project_name=cfg.get('metadata', 'name'),
+            version=cfg.get('metadata', 'version'), platform=get_platform(),
+        )
+
+        # Convert the .exe to an unpacked egg
+        egg_path = os.path.join(tmpdir, dist.egg_name() + '.egg')
+        dist.location = egg_path
+        egg_tmp = egg_path + '.tmp'
+        _egg_info = os.path.join(egg_tmp, 'EGG-INFO')
+        pkg_inf = os.path.join(_egg_info, 'PKG-INFO')
+        ensure_directory(pkg_inf)  # make sure EGG-INFO dir exists
+        dist._provider = PathMetadata(egg_tmp, _egg_info)  # XXX
+        self.exe_to_egg(dist_filename, egg_tmp)
+
+        # Write EGG-INFO/PKG-INFO
+        if not os.path.exists(pkg_inf):
+            f = open(pkg_inf, 'w')
+            f.write('Metadata-Version: 1.0\n')
+            for k, v in cfg.items('metadata'):
+                if k != 'target_version':
+                    f.write('%s: %s\n' % (k.replace('_', '-').title(), v))
+            f.close()
+        script_dir = os.path.join(_egg_info, 'scripts')
+        # delete entry-point scripts to avoid duping
+        self.delete_blockers([
+            os.path.join(script_dir, args[0])
+            for args in ScriptWriter.get_args(dist)
+        ])
+        # Build .egg file from tmpdir
+        bdist_egg.make_zipfile(
+            egg_path, egg_tmp, verbose=self.verbose, dry_run=self.dry_run,
+        )
+        # install the .egg
+        return self.install_egg(egg_path, tmpdir)
+
+    def exe_to_egg(self, dist_filename, egg_tmp):
+        """Extract a bdist_wininst to the directories an egg would use"""
+        # Check for .pth file and set up prefix translations
+        prefixes = get_exe_prefixes(dist_filename)
+        to_compile = []
+        native_libs = []
+        top_level = {}
+
+        def process(src, dst):
+            s = src.lower()
+            for old, new in prefixes:
+                if s.startswith(old):
+                    src = new + src[len(old):]
+                    parts = src.split('/')
+                    dst = os.path.join(egg_tmp, *parts)
+                    dl = dst.lower()
+                    if dl.endswith('.pyd') or dl.endswith('.dll'):
+                        parts[-1] = bdist_egg.strip_module(parts[-1])
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        native_libs.append(src)
+                    elif dl.endswith('.py') and old != 'SCRIPTS/':
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        to_compile.append(dst)
+                    return dst
+            if not src.endswith('.pth'):
+                log.warn("WARNING: can't process %s", src)
+            return None
+
+        # extract, tracking .pyd/.dll->native_libs and .py -> to_compile
+        unpack_archive(dist_filename, egg_tmp, process)
+        stubs = []
+        for res in native_libs:
+            if res.lower().endswith('.pyd'):  # create stubs for .pyd's
+                parts = res.split('/')
+                resource = parts[-1]
+                parts[-1] = bdist_egg.strip_module(parts[-1]) + '.py'
+                pyfile = os.path.join(egg_tmp, *parts)
+                to_compile.append(pyfile)
+                stubs.append(pyfile)
+                bdist_egg.write_stub(resource, pyfile)
+        self.byte_compile(to_compile)  # compile .py's
+        bdist_egg.write_safety_flag(
+            os.path.join(egg_tmp, 'EGG-INFO'),
+            bdist_egg.analyze_egg(egg_tmp, stubs))  # write zip-safety flag
+
+        for name in 'top_level', 'native_libs':
+            if locals()[name]:
+                txt = os.path.join(egg_tmp, 'EGG-INFO', name + '.txt')
+                if not os.path.exists(txt):
+                    f = open(txt, 'w')
+                    f.write('\n'.join(locals()[name]) + '\n')
+                    f.close()
+
+    def install_wheel(self, wheel_path, tmpdir):
+        wheel = Wheel(wheel_path)
+        assert wheel.is_compatible()
+        destination = os.path.join(self.install_dir, wheel.egg_name())
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+        if os.path.isdir(destination) and not os.path.islink(destination):
+            dir_util.remove_tree(destination, dry_run=self.dry_run)
+        elif os.path.exists(destination):
+            self.execute(
+                os.unlink,
+                (destination,),
+                "Removing " + destination,
+            )
+        try:
+            self.execute(
+                wheel.install_as_egg,
+                (destination,),
+                ("Installing %s to %s") % (
+                    os.path.basename(wheel_path),
+                    os.path.dirname(destination)
+                ),
+            )
+        finally:
+            update_dist_caches(destination, fix_zipimporter_caches=False)
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    __mv_warning = textwrap.dedent("""
+        Because this distribution was installed --multi-version, before you can
+        import modules from this package in an application, you will need to
+        'import pkg_resources' and then use a 'require()' call similar to one of
+        these examples, in order to select the desired version:
+
+            pkg_resources.require("%(name)s")  # latest installed version
+            pkg_resources.require("%(name)s==%(version)s")  # this exact version
+            pkg_resources.require("%(name)s>=%(version)s")  # this version or higher
+        """).lstrip()
+
+    __id_warning = textwrap.dedent("""
+        Note also that the installation directory must be on sys.path at runtime for
+        this to work.  (e.g. by being the application's script directory, by being on
+        PYTHONPATH, or by being added to sys.path by your code.)
+        """)
+
+    def installation_report(self, req, dist, what="Installed"):
+        """Helpful installation message for display to package users"""
+        msg = "\n%(what)s %(eggloc)s%(extras)s"
+        if self.multi_version and not self.no_report:
+            msg += '\n' + self.__mv_warning
+            if self.install_dir not in map(normalize_path, sys.path):
+                msg += '\n' + self.__id_warning
+
+        eggloc = dist.location
+        name = dist.project_name
+        version = dist.version
+        extras = ''  # TODO: self.report_extras(req, dist)
+        return msg % locals()
+
+    __editable_msg = textwrap.dedent("""
+        Extracted editable version of %(spec)s to %(dirname)s
+
+        If it uses setuptools in its setup script, you can activate it in
+        "development" mode by going to that directory and running::
+
+            %(python)s setup.py develop
+
+        See the setuptools documentation for the "develop" command for more info.
+        """).lstrip()
+
+    def report_editable(self, spec, setup_script):
+        dirname = os.path.dirname(setup_script)
+        python = sys.executable
+        return '\n' + self.__editable_msg % locals()
+
+    def run_setup(self, setup_script, setup_base, args):
+        sys.modules.setdefault('distutils.command.bdist_egg', bdist_egg)
+        sys.modules.setdefault('distutils.command.egg_info', egg_info)
+
+        args = list(args)
+        if self.verbose > 2:
+            v = 'v' * (self.verbose - 1)
+            args.insert(0, '-' + v)
+        elif self.verbose < 2:
+            args.insert(0, '-q')
+        if self.dry_run:
+            args.insert(0, '-n')
+        log.info(
+            "Running %s %s", setup_script[len(setup_base) + 1:], ' '.join(args)
+        )
+        try:
+            run_setup(setup_script, args)
+        except SystemExit as v:
+            raise DistutilsError("Setup script exited with %s" % (v.args[0],))
+
+    def build_and_install(self, setup_script, setup_base):
+        args = ['bdist_egg', '--dist-dir']
+
+        dist_dir = tempfile.mkdtemp(
+            prefix='egg-dist-tmp-', dir=os.path.dirname(setup_script)
+        )
+        try:
+            self._set_fetcher_options(os.path.dirname(setup_script))
+            args.append(dist_dir)
+
+            self.run_setup(setup_script, setup_base, args)
+            all_eggs = Environment([dist_dir])
+            eggs = []
+            for key in all_eggs:
+                for dist in all_eggs[key]:
+                    eggs.append(self.install_egg(dist.location, setup_base))
+            if not eggs and not self.dry_run:
+                log.warn("No eggs found in %s (setup script problem?)",
+                         dist_dir)
+            return eggs
+        finally:
+            rmtree(dist_dir)
+            log.set_verbosity(self.verbose)  # restore our log verbosity
+
+    def _set_fetcher_options(self, base):
+        """
+        When easy_install is about to run bdist_egg on a source dist, that
+        source dist might have 'setup_requires' directives, requiring
+        additional fetching. Ensure the fetcher options given to easy_install
+        are available to that command as well.
+        """
+        # find the fetch options from easy_install and write them out
+        # to the setup.cfg file.
+        ei_opts = self.distribution.get_option_dict('easy_install').copy()
+        fetch_directives = (
+            'find_links', 'site_dirs', 'index_url', 'optimize',
+            'site_dirs', 'allow_hosts',
+        )
+        fetch_options = {}
+        for key, val in ei_opts.items():
+            if key not in fetch_directives:
+                continue
+            fetch_options[key.replace('_', '-')] = val[1]
+        # create a settings dictionary suitable for `edit_config`
+        settings = dict(easy_install=fetch_options)
+        cfg_filename = os.path.join(base, 'setup.cfg')
+        setopt.edit_config(cfg_filename, settings)
+
+    def update_pth(self, dist):
+        if self.pth_file is None:
+            return
+
+        for d in self.pth_file[dist.key]:  # drop old entries
+            if self.multi_version or d.location != dist.location:
+                log.info("Removing %s from easy-install.pth file", d)
+                self.pth_file.remove(d)
+                if d.location in self.shadow_path:
+                    self.shadow_path.remove(d.location)
+
+        if not self.multi_version:
+            if dist.location in self.pth_file.paths:
+                log.info(
+                    "%s is already the active version in easy-install.pth",
+                    dist,
+                )
+            else:
+                log.info("Adding %s to easy-install.pth file", dist)
+                self.pth_file.add(dist)  # add new entry
+                if dist.location not in self.shadow_path:
+                    self.shadow_path.append(dist.location)
+
+        if not self.dry_run:
+
+            self.pth_file.save()
+
+            if dist.key == 'setuptools':
+                # Ensure that setuptools itself never becomes unavailable!
+                # XXX should this check for latest version?
+                filename = os.path.join(self.install_dir, 'setuptools.pth')
+                if os.path.islink(filename):
+                    os.unlink(filename)
+                f = open(filename, 'wt')
+                f.write(self.pth_file.make_relative(dist.location) + '\n')
+                f.close()
+
+    def unpack_progress(self, src, dst):
+        # Progress filter for unpacking
+        log.debug("Unpacking %s to %s", src, dst)
+        return dst  # only unpack-and-compile skips files for dry run
+
+    def unpack_and_compile(self, egg_path, destination):
+        to_compile = []
+        to_chmod = []
+
+        def pf(src, dst):
+            if dst.endswith('.py') and not src.startswith('EGG-INFO/'):
+                to_compile.append(dst)
+            elif dst.endswith('.dll') or dst.endswith('.so'):
+                to_chmod.append(dst)
+            self.unpack_progress(src, dst)
+            return not self.dry_run and dst or None
+
+        unpack_archive(egg_path, destination, pf)
+        self.byte_compile(to_compile)
+        if not self.dry_run:
+            for f in to_chmod:
+                mode = ((os.stat(f)[stat.ST_MODE]) | 0o555) & 0o7755
+                chmod(f, mode)
+
+    def byte_compile(self, to_compile):
+        if sys.dont_write_bytecode:
+            return
+
+        from distutils.util import byte_compile
+
+        try:
+            # try to make the byte compile messages quieter
+            log.set_verbosity(self.verbose - 1)
+
+            byte_compile(to_compile, optimize=0, force=1, dry_run=self.dry_run)
+            if self.optimize:
+                byte_compile(
+                    to_compile, optimize=self.optimize, force=1,
+                    dry_run=self.dry_run,
+                )
+        finally:
+            log.set_verbosity(self.verbose)  # restore original verbosity
+
+    __no_default_msg = textwrap.dedent("""
+        bad install directory or PYTHONPATH
+
+        You are attempting to install a package to a directory that is not
+        on PYTHONPATH and which Python does not read ".pth" files from.  The
+        installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+
+        and your PYTHONPATH environment variable currently contains:
+
+            %r
+
+        Here are some of your options for correcting the problem:
+
+        * You can choose a different installation directory, i.e., one that is
+          on PYTHONPATH or supports .pth files
+
+        * You can add the installation directory to the PYTHONPATH environment
+          variable.  (It must then also be on PYTHONPATH whenever you run
+          Python and want to use the package(s) you are installing.)
+
+        * You can set up the installation directory to support ".pth" files by
+          using one of the approaches described here:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html#custom-installation-locations
+
+
+        Please make the appropriate changes for your system and try again.""").lstrip()
+
+    def no_default_version_msg(self):
+        template = self.__no_default_msg
+        return template % (self.install_dir, os.environ.get('PYTHONPATH', ''))
+
+    def install_site_py(self):
+        """Make sure there's a site.py in the target dir, if needed"""
+
+        if self.sitepy_installed:
+            return  # already did it, or don't need to
+
+        sitepy = os.path.join(self.install_dir, "site.py")
+        source = resource_string("setuptools", "site-patch.py")
+        source = source.decode('utf-8')
+        current = ""
+
+        if os.path.exists(sitepy):
+            log.debug("Checking existing site.py in %s", self.install_dir)
+            with io.open(sitepy) as strm:
+                current = strm.read()
+
+            if not current.startswith('def __boot():'):
+                raise DistutilsError(
+                    "%s is not a setuptools-generated site.py; please"
+                    " remove it." % sitepy
+                )
+
+        if current != source:
+            log.info("Creating %s", sitepy)
+            if not self.dry_run:
+                ensure_directory(sitepy)
+                with io.open(sitepy, 'w', encoding='utf-8') as strm:
+                    strm.write(source)
+            self.byte_compile([sitepy])
+
+        self.sitepy_installed = True
+
+    def create_home_path(self):
+        """Create directories under ~."""
+        if not self.user:
+            return
+        home = convert_path(os.path.expanduser("~"))
+        for name, path in six.iteritems(self.config_vars):
+            if path.startswith(home) and not os.path.isdir(path):
+                self.debug_print("os.makedirs('%s', 0o700)" % path)
+                os.makedirs(path, 0o700)
+
+    INSTALL_SCHEMES = dict(
+        posix=dict(
+            install_dir='$base/lib/python$py_version_short/site-packages',
+            script_dir='$base/bin',
+        ),
+    )
+
+    DEFAULT_SCHEME = dict(
+        install_dir='$base/Lib/site-packages',
+        script_dir='$base/Scripts',
+    )
+
+    def _expand(self, *attrs):
+        config_vars = self.get_finalized_command('install').config_vars
+
+        if self.prefix:
+            # Set default install_dir/scripts from --prefix
+            config_vars = config_vars.copy()
+            config_vars['base'] = self.prefix
+            scheme = self.INSTALL_SCHEMES.get(os.name, self.DEFAULT_SCHEME)
+            for attr, val in scheme.items():
+                if getattr(self, attr, None) is None:
+                    setattr(self, attr, val)
+
+        from distutils.util import subst_vars
+
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                val = subst_vars(val, config_vars)
+                if os.name == 'posix':
+                    val = os.path.expanduser(val)
+                setattr(self, attr, val)
+
+
+def _pythonpath():
+    items = os.environ.get('PYTHONPATH', '').split(os.pathsep)
+    return filter(None, items)
+
+
+def get_site_dirs():
+    """
+    Return a list of 'site' dirs
+    """
+
+    sitedirs = []
+
+    # start with PYTHONPATH
+    sitedirs.extend(_pythonpath())
+
+    prefixes = [sys.prefix]
+    if sys.exec_prefix != sys.prefix:
+        prefixes.append(sys.exec_prefix)
+    for prefix in prefixes:
+        if prefix:
+            if sys.platform in ('os2emx', 'riscos'):
+                sitedirs.append(os.path.join(prefix, "Lib", "site-packages"))
+            elif os.sep == '/':
+                sitedirs.extend([
+                    os.path.join(
+                        prefix,
+                        "lib",
+                        "python" + sys.version[:3],
+                        "site-packages",
+                    ),
+                    os.path.join(prefix, "lib", "site-python"),
+                ])
+            else:
+                sitedirs.extend([
+                    prefix,
+                    os.path.join(prefix, "lib", "site-packages"),
+                ])
+            if sys.platform == 'darwin':
+                # for framework builds *only* we add the standard Apple
+                # locations. Currently only per-user, but /Library and
+                # /Network/Library could be added too
+                if 'Python.framework' in prefix:
+                    home = os.environ.get('HOME')
+                    if home:
+                        home_sp = os.path.join(
+                            home,
+                            'Library',
+                            'Python',
+                            sys.version[:3],
+                            'site-packages',
+                        )
+                        sitedirs.append(home_sp)
+    lib_paths = get_path('purelib'), get_path('platlib')
+    for site_lib in lib_paths:
+        if site_lib not in sitedirs:
+            sitedirs.append(site_lib)
+
+    if site.ENABLE_USER_SITE:
+        sitedirs.append(site.USER_SITE)
+
+    try:
+        sitedirs.extend(site.getsitepackages())
+    except AttributeError:
+        pass
+
+    sitedirs = list(map(normalize_path, sitedirs))
+
+    return sitedirs
+
+
+def expand_paths(inputs):
+    """Yield sys.path directories that might contain "old-style" packages"""
+
+    seen = {}
+
+    for dirname in inputs:
+        dirname = normalize_path(dirname)
+        if dirname in seen:
+            continue
+
+        seen[dirname] = 1
+        if not os.path.isdir(dirname):
+            continue
+
+        files = os.listdir(dirname)
+        yield dirname, files
+
+        for name in files:
+            if not name.endswith('.pth'):
+                # We only care about the .pth files
+                continue
+            if name in ('easy-install.pth', 'setuptools.pth'):
+                # Ignore .pth files that we control
+                continue
+
+            # Read the .pth file
+            f = open(os.path.join(dirname, name))
+            lines = list(yield_lines(f))
+            f.close()
+
+            # Yield existing non-dupe, non-import directory lines from it
+            for line in lines:
+                if not line.startswith("import"):
+                    line = normalize_path(line.rstrip())
+                    if line not in seen:
+                        seen[line] = 1
+                        if not os.path.isdir(line):
+                            continue
+                        yield line, os.listdir(line)
+
+
+def extract_wininst_cfg(dist_filename):
+    """Extract configuration data from a bdist_wininst .exe
+
+    Returns a configparser.RawConfigParser, or None
+    """
+    f = open(dist_filename, 'rb')
+    try:
+        endrec = zipfile._EndRecData(f)
+        if endrec is None:
+            return None
+
+        prepended = (endrec[9] - endrec[5]) - endrec[6]
+        if prepended < 12:  # no wininst data here
+            return None
+        f.seek(prepended - 12)
+
+        tag, cfglen, bmlen = struct.unpack("<iii", f.read(12))
+        if tag not in (0x1234567A, 0x1234567B):
+            return None  # not a valid tag
+
+        f.seek(prepended - (12 + cfglen))
+        init = {'version': '', 'target_version': ''}
+        cfg = configparser.RawConfigParser(init)
+        try:
+            part = f.read(cfglen)
+            # Read up to the first null byte.
+            config = part.split(b'\0', 1)[0]
+            # Now the config is in bytes, but for RawConfigParser, it should
+            #  be text, so decode it.
+            config = config.decode(sys.getfilesystemencoding())
+            cfg.readfp(six.StringIO(config))
+        except configparser.Error:
+            return None
+        if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
+            return None
+        return cfg
+
+    finally:
+        f.close()
+
+
+def get_exe_prefixes(exe_filename):
+    """Get exe->egg path translations for a given .exe file"""
+
+    prefixes = [
+        ('PURELIB/', ''),
+        ('PLATLIB/pywin32_system32', ''),
+        ('PLATLIB/', ''),
+        ('SCRIPTS/', 'EGG-INFO/scripts/'),
+        ('DATA/lib/site-packages', ''),
+    ]
+    z = zipfile.ZipFile(exe_filename)
+    try:
+        for info in z.infolist():
+            name = info.filename
+            parts = name.split('/')
+            if len(parts) == 3 and parts[2] == 'PKG-INFO':
+                if parts[1].endswith('.egg-info'):
+                    prefixes.insert(0, ('/'.join(parts[:2]), 'EGG-INFO/'))
+                    break
+            if len(parts) != 2 or not name.endswith('.pth'):
+                continue
+            if name.endswith('-nspkg.pth'):
+                continue
+            if parts[0].upper() in ('PURELIB', 'PLATLIB'):
+                contents = z.read(name)
+                if six.PY3:
+                    contents = contents.decode()
+                for pth in yield_lines(contents):
+                    pth = pth.strip().replace('\\', '/')
+                    if not pth.startswith('import'):
+                        prefixes.append((('%s/%s/' % (parts[0], pth)), ''))
+    finally:
+        z.close()
+    prefixes = [(x.lower(), y) for x, y in prefixes]
+    prefixes.sort()
+    prefixes.reverse()
+    return prefixes
+
+
+class PthDistributions(Environment):
+    """A .pth file with Distribution paths in it"""
+
+    dirty = False
+
+    def __init__(self, filename, sitedirs=()):
+        self.filename = filename
+        self.sitedirs = list(map(normalize_path, sitedirs))
+        self.basedir = normalize_path(os.path.dirname(self.filename))
+        self._load()
+        Environment.__init__(self, [], None, None)
+        for path in yield_lines(self.paths):
+            list(map(self.add, find_distributions(path, True)))
+
+    def _load(self):
+        self.paths = []
+        saw_import = False
+        seen = dict.fromkeys(self.sitedirs)
+        if os.path.isfile(self.filename):
+            f = open(self.filename, 'rt')
+            for line in f:
+                if line.startswith('import'):
+                    saw_import = True
+                    continue
+                path = line.rstrip()
+                self.paths.append(path)
+                if not path.strip() or path.strip().startswith('#'):
+                    continue
+                # skip non-existent paths, in case somebody deleted a package
+                # manually, and duplicate paths as well
+                path = self.paths[-1] = normalize_path(
+                    os.path.join(self.basedir, path)
+                )
+                if not os.path.exists(path) or path in seen:
+                    self.paths.pop()  # skip it
+                    self.dirty = True  # we cleaned up, so we're dirty now :)
+                    continue
+                seen[path] = 1
+            f.close()
+
+        if self.paths and not saw_import:
+            self.dirty = True  # ensure anything we touch has import wrappers
+        while self.paths and not self.paths[-1].strip():
+            self.paths.pop()
+
+    def save(self):
+        """Write changed .pth file back to disk"""
+        if not self.dirty:
+            return
+
+        rel_paths = list(map(self.make_relative, self.paths))
+        if rel_paths:
+            log.debug("Saving %s", self.filename)
+            lines = self._wrap_lines(rel_paths)
+            data = '\n'.join(lines) + '\n'
+
+            if os.path.islink(self.filename):
+                os.unlink(self.filename)
+            with open(self.filename, 'wt') as f:
+                f.write(data)
+
+        elif os.path.exists(self.filename):
+            log.debug("Deleting empty %s", self.filename)
+            os.unlink(self.filename)
+
+        self.dirty = False
+
+    @staticmethod
+    def _wrap_lines(lines):
+        return lines
+
+    def add(self, dist):
+        """Add `dist` to the distribution map"""
+        new_path = (
+            dist.location not in self.paths and (
+                dist.location not in self.sitedirs or
+                # account for '.' being in PYTHONPATH
+                dist.location == os.getcwd()
+            )
+        )
+        if new_path:
+            self.paths.append(dist.location)
+            self.dirty = True
+        Environment.add(self, dist)
+
+    def remove(self, dist):
+        """Remove `dist` from the distribution map"""
+        while dist.location in self.paths:
+            self.paths.remove(dist.location)
+            self.dirty = True
+        Environment.remove(self, dist)
+
+    def make_relative(self, path):
+        npath, last = os.path.split(normalize_path(path))
+        baselen = len(self.basedir)
+        parts = [last]
+        sep = os.altsep == '/' and '/' or os.sep
+        while len(npath) >= baselen:
+            if npath == self.basedir:
+                parts.append(os.curdir)
+                parts.reverse()
+                return sep.join(parts)
+            npath, last = os.path.split(npath)
+            parts.append(last)
+        else:
+            return path
+
+
+class RewritePthDistributions(PthDistributions):
+    @classmethod
+    def _wrap_lines(cls, lines):
+        yield cls.prelude
+        for line in lines:
+            yield line
+        yield cls.postlude
+
+    prelude = _one_liner("""
+        import sys
+        sys.__plen = len(sys.path)
+        """)
+    postlude = _one_liner("""
+        import sys
+        new = sys.path[sys.__plen:]
+        del sys.path[sys.__plen:]
+        p = getattr(sys, '__egginsert', 0)
+        sys.path[p:p] = new
+        sys.__egginsert = p + len(new)
+        """)
+
+
+if os.environ.get('SETUPTOOLS_SYS_PATH_TECHNIQUE', 'raw') == 'rewrite':
+    PthDistributions = RewritePthDistributions
+
+
+def _first_line_re():
+    """
+    Return a regular expression based on first_line_re suitable for matching
+    strings.
+    """
+    if isinstance(first_line_re.pattern, str):
+        return first_line_re
+
+    # first_line_re in Python >=3.1.4 and >=3.2.1 is a bytes pattern.
+    return re.compile(first_line_re.pattern.decode())
+
+
+def auto_chmod(func, arg, exc):
+    if func in [os.unlink, os.remove] and os.name == 'nt':
+        chmod(arg, stat.S_IWRITE)
+        return func(arg)
+    et, ev, _ = sys.exc_info()
+    six.reraise(et, (ev[0], ev[1] + (" %s %s" % (func, arg))))
+
+
+def update_dist_caches(dist_path, fix_zipimporter_caches):
+    """
+    Fix any globally cached `dist_path` related data
+
+    `dist_path` should be a path of a newly installed egg distribution (zipped
+    or unzipped).
+
+    sys.path_importer_cache contains finder objects that have been cached when
+    importing data from the original distribution. Any such finders need to be
+    cleared since the replacement distribution might be packaged differently,
+    e.g. a zipped egg distribution might get replaced with an unzipped egg
+    folder or vice versa. Having the old finders cached may then cause Python
+    to attempt loading modules from the replacement distribution using an
+    incorrect loader.
+
+    zipimport.zipimporter objects are Python loaders charged with importing
+    data packaged inside zip archives. If stale loaders referencing the
+    original distribution, are left behind, they can fail to load modules from
+    the replacement distribution. E.g. if an old zipimport.zipimporter instance
+    is used to load data from a new zipped egg archive, it may cause the
+    operation to attempt to locate the requested data in the wrong location -
+    one indicated by the original distribution's zip archive directory
+    information. Such an operation may then fail outright, e.g. report having
+    read a 'bad local file header', or even worse, it may fail silently &
+    return invalid data.
+
+    zipimport._zip_directory_cache contains cached zip archive directory
+    information for all existing zipimport.zipimporter instances and all such
+    instances connected to the same archive share the same cached directory
+    information.
+
+    If asked, and the underlying Python implementation allows it, we can fix
+    all existing zipimport.zipimporter instances instead of having to track
+    them down and remove them one by one, by updating their shared cached zip
+    archive directory information. This, of course, assumes that the
+    replacement distribution is packaged as a zipped egg.
+
+    If not asked to fix existing zipimport.zipimporter instances, we still do
+    our best to clear any remaining zipimport.zipimporter related cached data
+    that might somehow later get used when attempting to load data from the new
+    distribution and thus cause such load operations to fail. Note that when
+    tracking down such remaining stale data, we can not catch every conceivable
+    usage from here, and we clear only those that we know of and have found to
+    cause problems if left alive. Any remaining caches should be updated by
+    whomever is in charge of maintaining them, i.e. they should be ready to
+    handle us replacing their zip archives with new distributions at runtime.
+
+    """
+    # There are several other known sources of stale zipimport.zipimporter
+    # instances that we do not clear here, but might if ever given a reason to
+    # do so:
+    # * Global setuptools pkg_resources.working_set (a.k.a. 'master working
+    # set') may contain distributions which may in turn contain their
+    #   zipimport.zipimporter loaders.
+    # * Several zipimport.zipimporter loaders held by local variables further
+    #   up the function call stack when running the setuptools installation.
+    # * Already loaded modules may have their __loader__ attribute set to the
+    #   exact loader instance used when importing them. Python 3.4 docs state
+    #   that this information is intended mostly for introspection and so is
+    #   not expected to cause us problems.
+    normalized_path = normalize_path(dist_path)
+    _uncache(normalized_path, sys.path_importer_cache)
+    if fix_zipimporter_caches:
+        _replace_zip_directory_cache_data(normalized_path)
+    else:
+        # Here, even though we do not want to fix existing and now stale
+        # zipimporter cache information, we still want to remove it. Related to
+        # Python's zip archive directory information cache, we clear each of
+        # its stale entries in two phases:
+        #   1. Clear the entry so attempting to access zip archive information
+        #      via any existing stale zipimport.zipimporter instances fails.
+        #   2. Remove the entry from the cache so any newly constructed
+        #      zipimport.zipimporter instances do not end up using old stale
+        #      zip archive directory information.
+        # This whole stale data removal step does not seem strictly necessary,
+        # but has been left in because it was done before we started replacing
+        # the zip archive directory information cache content if possible, and
+        # there are no relevant unit tests that we can depend on to tell us if
+        # this is really needed.
+        _remove_and_clear_zip_directory_cache_data(normalized_path)
+
+
+def _collect_zipimporter_cache_entries(normalized_path, cache):
+    """
+    Return zipimporter cache entry keys related to a given normalized path.
+
+    Alternative path spellings (e.g. those using different character case or
+    those using alternative path separators) related to the same path are
+    included. Any sub-path entries are included as well, i.e. those
+    corresponding to zip archives embedded in other zip archives.
+
+    """
+    result = []
+    prefix_len = len(normalized_path)
+    for p in cache:
+        np = normalize_path(p)
+        if (np.startswith(normalized_path) and
+                np[prefix_len:prefix_len + 1] in (os.sep, '')):
+            result.append(p)
+    return result
+
+
+def _update_zipimporter_cache(normalized_path, cache, updater=None):
+    """
+    Update zipimporter cache data for a given normalized path.
+
+    Any sub-path entries are processed as well, i.e. those corresponding to zip
+    archives embedded in other zip archives.
+
+    Given updater is a callable taking a cache entry key and the original entry
+    (after already removing the entry from the cache), and expected to update
+    the entry and possibly return a new one to be inserted in its place.
+    Returning None indicates that the entry should not be replaced with a new
+    one. If no updater is given, the cache entries are simply removed without
+    any additional processing, the same as if the updater simply returned None.
+
+    """
+    for p in _collect_zipimporter_cache_entries(normalized_path, cache):
+        # N.B. pypy's custom zipimport._zip_directory_cache implementation does
+        # not support the complete dict interface:
+        # * Does not support item assignment, thus not allowing this function
+        #    to be used only for removing existing cache entries.
+        #  * Does not support the dict.pop() method, forcing us to use the
+        #    get/del patterns instead. For more detailed information see the
+        #    following links:
+        #      https://github.com/pypa/setuptools/issues/202#issuecomment-202913420
+        #      http://bit.ly/2h9itJX
+        old_entry = cache[p]
+        del cache[p]
+        new_entry = updater and updater(p, old_entry)
+        if new_entry is not None:
+            cache[p] = new_entry
+
+
+def _uncache(normalized_path, cache):
+    _update_zipimporter_cache(normalized_path, cache)
+
+
+def _remove_and_clear_zip_directory_cache_data(normalized_path):
+    def clear_and_remove_cached_zip_archive_directory_data(path, old_entry):
+        old_entry.clear()
+
+    _update_zipimporter_cache(
+        normalized_path, zipimport._zip_directory_cache,
+        updater=clear_and_remove_cached_zip_archive_directory_data)
+
+
+# PyPy Python implementation does not allow directly writing to the
+# zipimport._zip_directory_cache and so prevents us from attempting to correct
+# its content. The best we can do there is clear the problematic cache content
+# and have PyPy repopulate it as needed. The downside is that if there are any
+# stale zipimport.zipimporter instances laying around, attempting to use them
+# will fail due to not having its zip archive directory information available
+# instead of being automatically corrected to use the new correct zip archive
+# directory information.
+if '__pypy__' in sys.builtin_module_names:
+    _replace_zip_directory_cache_data = \
+        _remove_and_clear_zip_directory_cache_data
+else:
+
+    def _replace_zip_directory_cache_data(normalized_path):
+        def replace_cached_zip_archive_directory_data(path, old_entry):
+            # N.B. In theory, we could load the zip directory information just
+            # once for all updated path spellings, and then copy it locally and
+            # update its contained path strings to contain the correct
+            # spelling, but that seems like a way too invasive move (this cache
+            # structure is not officially documented anywhere and could in
+            # theory change with new Python releases) for no significant
+            # benefit.
+            old_entry.clear()
+            zipimport.zipimporter(path)
+            old_entry.update(zipimport._zip_directory_cache[path])
+            return old_entry
+
+        _update_zipimporter_cache(
+            normalized_path, zipimport._zip_directory_cache,
+            updater=replace_cached_zip_archive_directory_data)
+
+
+def is_python(text, filename='<string>'):
+    "Is this string a valid Python script?"
+    try:
+        compile(text, filename, 'exec')
+    except (SyntaxError, TypeError):
+        return False
+    else:
+        return True
+
+
+def is_sh(executable):
+    """Determine if the specified executable is a .sh (contains a #! line)"""
+    try:
+        with io.open(executable, encoding='latin-1') as fp:
+            magic = fp.read(2)
+    except (OSError, IOError):
+        return executable
+    return magic == '#!'
+
+
+def nt_quote_arg(arg):
+    """Quote a command line argument according to Windows parsing rules"""
+    return subprocess.list2cmdline([arg])
+
+
+def is_python_script(script_text, filename):
+    """Is this text, as a whole, a Python script? (as opposed to shell/bat/etc.
+    """
+    if filename.endswith('.py') or filename.endswith('.pyw'):
+        return True  # extension says it's Python
+    if is_python(script_text, filename):
+        return True  # it's syntactically valid Python
+    if script_text.startswith('#!'):
+        # It begins with a '#!' line, so check if 'python' is in it somewhere
+        return 'python' in script_text.splitlines()[0].lower()
+
+    return False  # Not any Python I can recognize
+
+
+try:
+    from os import chmod as _chmod
+except ImportError:
+    # Jython compatibility
+    def _chmod(*args):
+        pass
+
+
+def chmod(path, mode):
+    log.debug("changing mode of %s to %o", path, mode)
+    try:
+        _chmod(path, mode)
+    except os.error as e:
+        log.debug("chmod failed: %s", e)
+
+
+class CommandSpec(list):
+    """
+    A command spec for a #! header, specified as a list of arguments akin to
+    those passed to Popen.
+    """
+
+    options = []
+    split_args = dict()
+
+    @classmethod
+    def best(cls):
+        """
+        Choose the best CommandSpec class based on environmental conditions.
+        """
+        return cls
+
+    @classmethod
+    def _sys_executable(cls):
+        _default = os.path.normpath(sys.executable)
+        return os.environ.get('__PYVENV_LAUNCHER__', _default)
+
+    @classmethod
+    def from_param(cls, param):
+        """
+        Construct a CommandSpec from a parameter to build_scripts, which may
+        be None.
+        """
+        if isinstance(param, cls):
+            return param
+        if isinstance(param, list):
+            return cls(param)
+        if param is None:
+            return cls.from_environment()
+        # otherwise, assume it's a string.
+        return cls.from_string(param)
+
+    @classmethod
+    def from_environment(cls):
+        return cls([cls._sys_executable()])
+
+    @classmethod
+    def from_string(cls, string):
+        """
+        Construct a command spec from a simple string representing a command
+        line parseable by shlex.split.
+        """
+        items = shlex.split(string, **cls.split_args)
+        return cls(items)
+
+    def install_options(self, script_text):
+        self.options = shlex.split(self._extract_options(script_text))
+        cmdline = subprocess.list2cmdline(self)
+        if not isascii(cmdline):
+            self.options[:0] = ['-x']
+
+    @staticmethod
+    def _extract_options(orig_script):
+        """
+        Extract any options from the first line of the script.
+        """
+        first = (orig_script + '\n').splitlines()[0]
+        match = _first_line_re().match(first)
+        options = match.group(1) or '' if match else ''
+        return options.strip()
+
+    def as_header(self):
+        return self._render(self + list(self.options))
+
+    @staticmethod
+    def _strip_quotes(item):
+        _QUOTES = '"\''
+        for q in _QUOTES:
+            if item.startswith(q) and item.endswith(q):
+                return item[1:-1]
+        return item
+
+    @staticmethod
+    def _render(items):
+        cmdline = subprocess.list2cmdline(
+            CommandSpec._strip_quotes(item.strip()) for item in items)
+        return '#!' + cmdline + '\n'
+
+
+# For pbr compat; will be removed in a future version.
+sys_executable = CommandSpec._sys_executable()
+
+
+class WindowsCommandSpec(CommandSpec):
+    split_args = dict(posix=False)
+
+
+class ScriptWriter:
+    """
+    Encapsulates behavior around writing entry point scripts for console and
+    gui apps.
+    """
+
+    template = textwrap.dedent(r"""
+        # EASY-INSTALL-ENTRY-SCRIPT: %(spec)r,%(group)r,%(name)r
+        __requires__ = %(spec)r
+        import re
+        import sys
+        from pkg_resources import load_entry_point
+
+        if __name__ == '__main__':
+            sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+            sys.exit(
+                load_entry_point(%(spec)r, %(group)r, %(name)r)()
+            )
+    """).lstrip()
+
+    command_spec_class = CommandSpec
+
+    @classmethod
+    def get_script_args(cls, dist, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_args", EasyInstallDeprecationWarning)
+        writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
+        header = cls.get_script_header("", executable, wininst)
+        return writer.get_args(dist, header)
+
+    @classmethod
+    def get_script_header(cls, script_text, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_header", EasyInstallDeprecationWarning, stacklevel=2)
+        if wininst:
+            executable = "python.exe"
+        return cls.get_header(script_text, executable)
+
+    @classmethod
+    def get_args(cls, dist, header=None):
+        """
+        Yield write_script() argument tuples for a distribution's
+        console_scripts and gui_scripts entry points.
+        """
+        if header is None:
+            header = cls.get_header()
+        spec = str(dist.as_requirement())
+        for type_ in 'console', 'gui':
+            group = type_ + '_scripts'
+            for name, ep in dist.get_entry_map(group).items():
+                cls._ensure_safe_name(name)
+                script_text = cls.template % locals()
+                args = cls._get_script_args(type_, name, header, script_text)
+                for res in args:
+                    yield res
+
+    @staticmethod
+    def _ensure_safe_name(name):
+        """
+        Prevent paths in *_scripts entry point names.
+        """
+        has_path_sep = re.search(r'[\\/]', name)
+        if has_path_sep:
+            raise ValueError("Path separators not allowed in script names")
+
+    @classmethod
+    def get_writer(cls, force_windows):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return WindowsScriptWriter.best() if force_windows else cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter for this environment.
+        """
+        if sys.platform == 'win32' or (os.name == 'java' and os._name == 'nt'):
+            return WindowsScriptWriter.best()
+        else:
+            return cls
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        # Simply write the stub with no extension.
+        yield (name, header + script_text)
+
+    @classmethod
+    def get_header(cls, script_text="", executable=None):
+        """Create a #! line, getting options (if any) from script_text"""
+        cmd = cls.command_spec_class.best().from_param(executable)
+        cmd.install_options(script_text)
+        return cmd.as_header()
+
+
+class WindowsScriptWriter(ScriptWriter):
+    command_spec_class = WindowsCommandSpec
+
+    @classmethod
+    def get_writer(cls):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter suitable for Windows
+        """
+        writer_lookup = dict(
+            executable=WindowsExecutableLauncherWriter,
+            natural=cls,
+        )
+        # for compatibility, use the executable launcher by default
+        launcher = os.environ.get('SETUPTOOLS_LAUNCHER', 'executable')
+        return writer_lookup[launcher]
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        "For Windows, add a .py extension"
+        ext = dict(console='.pya', gui='.pyw')[type_]
+        if ext not in os.environ['PATHEXT'].lower().split(';'):
+            msg = (
+                "{ext} not listed in PATHEXT; scripts will not be "
+                "recognized as executables."
+            ).format(**locals())
+            warnings.warn(msg, UserWarning)
+        old = ['.pya', '.py', '-script.py', '.pyc', '.pyo', '.pyw', '.exe']
+        old.remove(ext)
+        header = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield name + ext, header + script_text, 't', blockers
+
+    @classmethod
+    def _adjust_header(cls, type_, orig_header):
+        """
+        Make sure 'pythonw' is used for gui and and 'python' is used for
+        console (regardless of what sys.executable is).
+        """
+        pattern = 'pythonw.exe'
+        repl = 'python.exe'
+        if type_ == 'gui':
+            pattern, repl = repl, pattern
+        pattern_ob = re.compile(re.escape(pattern), re.IGNORECASE)
+        new_header = pattern_ob.sub(string=orig_header, repl=repl)
+        return new_header if cls._use_header(new_header) else orig_header
+
+    @staticmethod
+    def _use_header(new_header):
+        """
+        Should _adjust_header use the replaced header?
+
+        On non-windows systems, always use. On
+        Windows systems, only use the replaced header if it resolves
+        to an executable on the system.
+        """
+        clean_header = new_header[2:-1].strip('"')
+        return sys.platform != 'win32' or find_executable(clean_header)
+
+
+class WindowsExecutableLauncherWriter(WindowsScriptWriter):
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        """
+        For Windows, add a .py extension and an .exe launcher
+        """
+        if type_ == 'gui':
+            launcher_type = 'gui'
+            ext = '-script.pyw'
+            old = ['.pyw']
+        else:
+            launcher_type = 'cli'
+            ext = '-script.py'
+            old = ['.py', '.pyc', '.pyo']
+        hdr = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield (name + ext, hdr + script_text, 't', blockers)
+        yield (
+            name + '.exe', get_win_launcher(launcher_type),
+            'b'  # write in binary mode
+        )
+        if not is_64bit():
+            # install a manifest for the launcher to prevent Windows
+            # from detecting it as an installer (which it will for
+            #  launchers like easy_install.exe). Consider only
+            #  adding a manifest for launchers detected as installers.
+            #  See Distribute #143 for details.
+            m_name = name + '.exe.manifest'
+            yield (m_name, load_launcher_manifest(name), 't')
+
+
+# for backward-compatibility
+get_script_args = ScriptWriter.get_script_args
+get_script_header = ScriptWriter.get_script_header
+
+
+def get_win_launcher(type):
+    """
+    Load the Windows launcher (executable) suitable for launching a script.
+
+    `type` should be either 'cli' or 'gui'
+
+    Returns the executable as a byte string.
+    """
+    launcher_fn = '%s.exe' % type
+    if is_64bit():
+        launcher_fn = launcher_fn.replace(".", "-64.")
+    else:
+        launcher_fn = launcher_fn.replace(".", "-32.")
+    return resource_string('setuptools', launcher_fn)
+
+
+def load_launcher_manifest(name):
+    manifest = pkg_resources.resource_string(__name__, 'launcher manifest.xml')
+    if six.PY2:
+        return manifest % vars()
+    else:
+        return manifest.decode('utf-8') % vars()
+
+
+def rmtree(path, ignore_errors=False, onerror=auto_chmod):
+    return shutil.rmtree(path, ignore_errors, onerror)
+
+
+def current_umask():
+    tmp = os.umask(0o022)
+    os.umask(tmp)
+    return tmp
+
+
+def bootstrap():
+    # This function is called when setuptools*.egg is run using /bin/sh
+    import setuptools
+
+    argv0 = os.path.dirname(setuptools.__path__[0])
+    sys.argv[0] = argv0
+    sys.argv.append(argv0)
+    main()
+
+
+def main(argv=None, **kw):
+    from setuptools import setup
+    from setuptools.dist import Distribution
+
+    class DistributionWithoutHelpCommands(Distribution):
+        common_usage = ""
+
+        def _show_help(self, *args, **kw):
+            with _patch_usage():
+                Distribution._show_help(self, *args, **kw)
+
+    if argv is None:
+        argv = sys.argv[1:]
+
+    with _patch_usage():
+        setup(
+            script_args=['-q', 'easy_install', '-v'] + argv,
+            script_name=sys.argv[0] or 'easy_install',
+            distclass=DistributionWithoutHelpCommands,
+            **kw
+        )
+
+
+@contextlib.contextmanager
+def _patch_usage():
+    import distutils.core
+    USAGE = textwrap.dedent("""
+        usage: %(script)s [options] requirement_or_url ...
+           or: %(script)s --help
+        """).lstrip()
+
+    def gen_usage(script_name):
+        return USAGE % dict(
+            script=os.path.basename(script_name),
+        )
+
+    saved = distutils.core.gen_usage
+    distutils.core.gen_usage = gen_usage
+    try:
+        yield
+    finally:
+        distutils.core.gen_usage = saved
+
+class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in EasyInstall in SetupTools. Not ignored by default, unlike DeprecationWarning."""
+    
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/egg_info.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/egg_info.py
new file mode 100644
index 00000000..5d8f451e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/egg_info.py
@@ -0,0 +1,717 @@
+"""setuptools.command.egg_info
+
+Create a distribution's .egg-info directory and contents"""
+
+from distutils.filelist import FileList as _FileList
+from distutils.errors import DistutilsInternalError
+from distutils.util import convert_path
+from distutils import log
+import distutils.errors
+import distutils.filelist
+import os
+import re
+import sys
+import io
+import warnings
+import time
+import collections
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map
+
+from setuptools import Command
+from setuptools.command.sdist import sdist
+from setuptools.command.sdist import walk_revctrl
+from setuptools.command.setopt import edit_config
+from setuptools.command import bdist_egg
+from pkg_resources import (
+    parse_requirements, safe_name, parse_version,
+    safe_version, yield_lines, EntryPoint, iter_entry_points, to_filename)
+import setuptools.unicode_utils as unicode_utils
+from setuptools.glob import glob
+
+from setuptools.extern import packaging
+from setuptools import SetuptoolsDeprecationWarning
+
+def translate_pattern(glob):
+    """
+    Translate a file path glob like '*.txt' in to a regular expression.
+    This differs from fnmatch.translate which allows wildcards to match
+    directory separators. It also knows about '**/' which matches any number of
+    directories.
+    """
+    pat = ''
+
+    # This will split on '/' within [character classes]. This is deliberate.
+    chunks = glob.split(os.path.sep)
+
+    sep = re.escape(os.sep)
+    valid_char = '[^%s]' % (sep,)
+
+    for c, chunk in enumerate(chunks):
+        last_chunk = c == len(chunks) - 1
+
+        # Chunks that are a literal ** are globstars. They match anything.
+        if chunk == '**':
+            if last_chunk:
+                # Match anything if this is the last component
+                pat += '.*'
+            else:
+                # Match '(name/)*'
+                pat += '(?:%s+%s)*' % (valid_char, sep)
+            continue  # Break here as the whole path component has been handled
+
+        # Find any special characters in the remainder
+        i = 0
+        chunk_len = len(chunk)
+        while i < chunk_len:
+            char = chunk[i]
+            if char == '*':
+                # Match any number of name characters
+                pat += valid_char + '*'
+            elif char == '?':
+                # Match a name character
+                pat += valid_char
+            elif char == '[':
+                # Character class
+                inner_i = i + 1
+                # Skip initial !/] chars
+                if inner_i < chunk_len and chunk[inner_i] == '!':
+                    inner_i = inner_i + 1
+                if inner_i < chunk_len and chunk[inner_i] == ']':
+                    inner_i = inner_i + 1
+
+                # Loop till the closing ] is found
+                while inner_i < chunk_len and chunk[inner_i] != ']':
+                    inner_i = inner_i + 1
+
+                if inner_i >= chunk_len:
+                    # Got to the end of the string without finding a closing ]
+                    # Do not treat this as a matching group, but as a literal [
+                    pat += re.escape(char)
+                else:
+                    # Grab the insides of the [brackets]
+                    inner = chunk[i + 1:inner_i]
+                    char_class = ''
+
+                    # Class negation
+                    if inner[0] == '!':
+                        char_class = '^'
+                        inner = inner[1:]
+
+                    char_class += re.escape(inner)
+                    pat += '[%s]' % (char_class,)
+
+                    # Skip to the end ]
+                    i = inner_i
+            else:
+                pat += re.escape(char)
+            i += 1
+
+        # Join each chunk with the dir separator
+        if not last_chunk:
+            pat += sep
+
+    pat += r'\Z'
+    return re.compile(pat, flags=re.MULTILINE|re.DOTALL)
+
+
+class InfoCommon:
+    tag_build = None
+    tag_date = None
+
+    @property
+    def name(self):
+        return safe_name(self.distribution.get_name())
+
+    def tagged_version(self):
+        version = self.distribution.get_version()
+        # egg_info may be called more than once for a distribution,
+        # in which case the version string already contains all tags.
+        if self.vtags and version.endswith(self.vtags):
+            return safe_version(version)
+        return safe_version(version + self.vtags)
+
+    def tags(self):
+        version = ''
+        if self.tag_build:
+            version += self.tag_build
+        if self.tag_date:
+            version += time.strftime("-%Y%m%d")
+        return version
+    vtags = property(tags)
+
+
+class egg_info(InfoCommon, Command):
+    description = "create a distribution's .egg-info directory"
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+        ('tag-date', 'd', "Add date stamp (e.g. 20050528) to version number"),
+        ('tag-build=', 'b', "Specify explicit tag to add to version number"),
+        ('no-date', 'D', "Don't include date stamp [default]"),
+    ]
+
+    boolean_options = ['tag-date']
+    negative_opt = {
+        'no-date': 'tag-date',
+    }
+
+    def initialize_options(self):
+        self.egg_base = None
+        self.egg_name = None
+        self.egg_info = None
+        self.egg_version = None
+        self.broken_egg_info = False
+
+    ####################################
+    # allow the 'tag_svn_revision' to be detected and
+    # set, supporting sdists built on older Setuptools.
+    @property
+    def tag_svn_revision(self):
+        pass
+
+    @tag_svn_revision.setter
+    def tag_svn_revision(self, value):
+        pass
+    ####################################
+
+    def save_version_info(self, filename):
+        """
+        Materialize the value of date into the
+        build tag. Install build keys in a deterministic order
+        to avoid arbitrary reordering on subsequent builds.
+        """
+        egg_info = collections.OrderedDict()
+        # follow the order these keys would have been added
+        # when PYTHONHASHSEED=0
+        egg_info['tag_build'] = self.tags()
+        egg_info['tag_date'] = 0
+        edit_config(filename, dict(egg_info=egg_info))
+
+    def finalize_options(self):
+        # Note: we need to capture the current value returned
+        # by `self.tagged_version()`, so we can later update
+        # `self.distribution.metadata.version` without
+        # repercussions.
+        self.egg_name = self.name
+        self.egg_version = self.tagged_version()
+        parsed_version = parse_version(self.egg_version)
+
+        try:
+            is_version = isinstance(parsed_version, packaging.version.Version)
+            spec = (
+                "%s==%s" if is_version else "%s===%s"
+            )
+            list(
+                parse_requirements(spec % (self.egg_name, self.egg_version))
+            )
+        except ValueError:
+            raise distutils.errors.DistutilsOptionError(
+                "Invalid distribution name or version syntax: %s-%s" %
+                (self.egg_name, self.egg_version)
+            )
+
+        if self.egg_base is None:
+            dirs = self.distribution.package_dir
+            self.egg_base = (dirs or {}).get('', os.curdir)
+
+        self.ensure_dirname('egg_base')
+        self.egg_info = to_filename(self.egg_name) + '.egg-info'
+        if self.egg_base != os.curdir:
+            self.egg_info = os.path.join(self.egg_base, self.egg_info)
+        if '-' in self.egg_name:
+            self.check_broken_egg_info()
+
+        # Set package version for the benefit of dumber commands
+        # (e.g. sdist, bdist_wininst, etc.)
+        #
+        self.distribution.metadata.version = self.egg_version
+
+        # If we bootstrapped around the lack of a PKG-INFO, as might be the
+        # case in a fresh checkout, make sure that any special tags get added
+        # to the version info
+        #
+        pd = self.distribution._patched_dist
+        if pd is not None and pd.key == self.egg_name.lower():
+            pd._version = self.egg_version
+            pd._parsed_version = parse_version(self.egg_version)
+            self.distribution._patched_dist = None
+
+    def write_or_delete_file(self, what, filename, data, force=False):
+        """Write `data` to `filename` or delete if empty
+
+        If `data` is non-empty, this routine is the same as ``write_file()``.
+        If `data` is empty but not ``None``, this is the same as calling
+        ``delete_file(filename)`.  If `data` is ``None``, then this is a no-op
+        unless `filename` exists, in which case a warning is issued about the
+        orphaned file (if `force` is false), or deleted (if `force` is true).
+        """
+        if data:
+            self.write_file(what, filename, data)
+        elif os.path.exists(filename):
+            if data is None and not force:
+                log.warn(
+                    "%s not set in setup(), but %s exists", what, filename
+                )
+                return
+            else:
+                self.delete_file(filename)
+
+    def write_file(self, what, filename, data):
+        """Write `data` to `filename` (if not a dry run) after announcing it
+
+        `what` is used in a log message to identify what is being written
+        to the file.
+        """
+        log.info("writing %s to %s", what, filename)
+        if six.PY3:
+            data = data.encode("utf-8")
+        if not self.dry_run:
+            f = open(filename, 'wb')
+            f.write(data)
+            f.close()
+
+    def delete_file(self, filename):
+        """Delete `filename` (if not a dry run) after announcing it"""
+        log.info("deleting %s", filename)
+        if not self.dry_run:
+            os.unlink(filename)
+
+    def run(self):
+        self.mkpath(self.egg_info)
+        os.utime(self.egg_info, None)
+        installer = self.distribution.fetch_build_egg
+        for ep in iter_entry_points('egg_info.writers'):
+            ep.require(installer=installer)
+            writer = ep.resolve()
+            writer(self, ep.name, os.path.join(self.egg_info, ep.name))
+
+        # Get rid of native_libs.txt if it was put there by older bdist_egg
+        nl = os.path.join(self.egg_info, "native_libs.txt")
+        if os.path.exists(nl):
+            self.delete_file(nl)
+
+        self.find_sources()
+
+    def find_sources(self):
+        """Generate SOURCES.txt manifest file"""
+        manifest_filename = os.path.join(self.egg_info, "SOURCES.txt")
+        mm = manifest_maker(self.distribution)
+        mm.manifest = manifest_filename
+        mm.run()
+        self.filelist = mm.filelist
+
+    def check_broken_egg_info(self):
+        bei = self.egg_name + '.egg-info'
+        if self.egg_base != os.curdir:
+            bei = os.path.join(self.egg_base, bei)
+        if os.path.exists(bei):
+            log.warn(
+                "-" * 78 + '\n'
+                "Note: Your current .egg-info directory has a '-' in its name;"
+                '\nthis will not work correctly with "setup.py develop".\n\n'
+                'Please rename %s to %s to correct this problem.\n' + '-' * 78,
+                bei, self.egg_info
+            )
+            self.broken_egg_info = self.egg_info
+            self.egg_info = bei  # make it work for now
+
+
+class FileList(_FileList):
+    # Implementations of the various MANIFEST.in commands
+
+    def process_template_line(self, line):
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dir_pattern).
+        (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            self.debug_print("include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.include(pattern):
+                    log.warn("warning: no files found matching '%s'", pattern)
+
+        elif action == 'exclude':
+            self.debug_print("exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.exclude(pattern):
+                    log.warn(("warning: no previously-included files "
+                              "found matching '%s'"), pattern)
+
+        elif action == 'global-include':
+            self.debug_print("global-include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_include(pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "anywhere in distribution"), pattern)
+
+        elif action == 'global-exclude':
+            self.debug_print("global-exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_exclude(pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found anywhere in distribution"),
+                             pattern)
+
+        elif action == 'recursive-include':
+            self.debug_print("recursive-include %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_include(dir, pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'recursive-exclude':
+            self.debug_print("recursive-exclude %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_exclude(dir, pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'graft':
+            self.debug_print("graft " + dir_pattern)
+            if not self.graft(dir_pattern):
+                log.warn("warning: no directories found matching '%s'",
+                         dir_pattern)
+
+        elif action == 'prune':
+            self.debug_print("prune " + dir_pattern)
+            if not self.prune(dir_pattern):
+                log.warn(("no previously-included directories found "
+                          "matching '%s'"), dir_pattern)
+
+        else:
+            raise DistutilsInternalError(
+                "this cannot happen: invalid action '%s'" % action)
+
+    def _remove_files(self, predicate):
+        """
+        Remove all files from the file list that match the predicate.
+        Return True if any matching files were removed
+        """
+        found = False
+        for i in range(len(self.files) - 1, -1, -1):
+            if predicate(self.files[i]):
+                self.debug_print(" removing " + self.files[i])
+                del self.files[i]
+                found = True
+        return found
+
+    def include(self, pattern):
+        """Include files that match 'pattern'."""
+        found = [f for f in glob(pattern) if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def exclude(self, pattern):
+        """Exclude files that match 'pattern'."""
+        match = translate_pattern(pattern)
+        return self._remove_files(match.match)
+
+    def recursive_include(self, dir, pattern):
+        """
+        Include all files anywhere in 'dir/' that match the pattern.
+        """
+        full_pattern = os.path.join(dir, '**', pattern)
+        found = [f for f in glob(full_pattern, recursive=True)
+                 if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def recursive_exclude(self, dir, pattern):
+        """
+        Exclude any file anywhere in 'dir/' that match the pattern.
+        """
+        match = translate_pattern(os.path.join(dir, '**', pattern))
+        return self._remove_files(match.match)
+
+    def graft(self, dir):
+        """Include all files from 'dir/'."""
+        found = [
+            item
+            for match_dir in glob(dir)
+            for item in distutils.filelist.findall(match_dir)
+        ]
+        self.extend(found)
+        return bool(found)
+
+    def prune(self, dir):
+        """Filter out files from 'dir/'."""
+        match = translate_pattern(os.path.join(dir, '**'))
+        return self._remove_files(match.match)
+
+    def global_include(self, pattern):
+        """
+        Include all files anywhere in the current directory that match the
+        pattern. This is very inefficient on large file trees.
+        """
+        if self.allfiles is None:
+            self.findall()
+        match = translate_pattern(os.path.join('**', pattern))
+        found = [f for f in self.allfiles if match.match(f)]
+        self.extend(found)
+        return bool(found)
+
+    def global_exclude(self, pattern):
+        """
+        Exclude all files anywhere that match the pattern.
+        """
+        match = translate_pattern(os.path.join('**', pattern))
+        return self._remove_files(match.match)
+
+    def append(self, item):
+        if item.endswith('\r'):  # Fix older sdists built on Windows
+            item = item[:-1]
+        path = convert_path(item)
+
+        if self._safe_path(path):
+            self.files.append(path)
+
+    def extend(self, paths):
+        self.files.extend(filter(self._safe_path, paths))
+
+    def _repair(self):
+        """
+        Replace self.files with only safe paths
+
+        Because some owners of FileList manipulate the underlying
+        ``files`` attribute directly, this method must be called to
+        repair those paths.
+        """
+        self.files = list(filter(self._safe_path, self.files))
+
+    def _safe_path(self, path):
+        enc_warn = "'%s' not %s encodable -- skipping"
+
+        # To avoid accidental trans-codings errors, first to unicode
+        u_path = unicode_utils.filesys_decode(path)
+        if u_path is None:
+            log.warn("'%s' in unexpected encoding -- skipping" % path)
+            return False
+
+        # Must ensure utf-8 encodability
+        utf8_path = unicode_utils.try_encode(u_path, "utf-8")
+        if utf8_path is None:
+            log.warn(enc_warn, path, 'utf-8')
+            return False
+
+        try:
+            # accept is either way checks out
+            if os.path.exists(u_path) or os.path.exists(utf8_path):
+                return True
+        # this will catch any encode errors decoding u_path
+        except UnicodeEncodeError:
+            log.warn(enc_warn, path, sys.getfilesystemencoding())
+
+
+class manifest_maker(sdist):
+    template = "MANIFEST.in"
+
+    def initialize_options(self):
+        self.use_defaults = 1
+        self.prune = 1
+        self.manifest_only = 1
+        self.force_manifest = 1
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        self.filelist = FileList()
+        if not os.path.exists(self.manifest):
+            self.write_manifest()  # it must exist so it'll get in the list
+        self.add_defaults()
+        if os.path.exists(self.template):
+            self.read_template()
+        self.prune_file_list()
+        self.filelist.sort()
+        self.filelist.remove_duplicates()
+        self.write_manifest()
+
+    def _manifest_normalize(self, path):
+        path = unicode_utils.filesys_decode(path)
+        return path.replace(os.sep, '/')
+
+    def write_manifest(self):
+        """
+        Write the file list in 'self.filelist' to the manifest file
+        named by 'self.manifest'.
+        """
+        self.filelist._repair()
+
+        # Now _repairs should encodability, but not unicode
+        files = [self._manifest_normalize(f) for f in self.filelist.files]
+        msg = "writing manifest file '%s'" % self.manifest
+        self.execute(write_file, (self.manifest, files), msg)
+
+    def warn(self, msg):
+        if not self._should_suppress_warning(msg):
+            sdist.warn(self, msg)
+
+    @staticmethod
+    def _should_suppress_warning(msg):
+        """
+        suppress missing-file warnings from sdist
+        """
+        return re.match(r"standard file .*not found", msg)
+
+    def add_defaults(self):
+        sdist.add_defaults(self)
+        self.check_license()
+        self.filelist.append(self.template)
+        self.filelist.append(self.manifest)
+        rcfiles = list(walk_revctrl())
+        if rcfiles:
+            self.filelist.extend(rcfiles)
+        elif os.path.exists(self.manifest):
+            self.read_manifest()
+
+        if os.path.exists("setup.py"):
+            # setup.py should be included by default, even if it's not
+            # the script called to create the sdist
+            self.filelist.append("setup.py")
+
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist.graft(ei_cmd.egg_info)
+
+    def prune_file_list(self):
+        build = self.get_finalized_command('build')
+        base_dir = self.distribution.get_fullname()
+        self.filelist.prune(build.build_base)
+        self.filelist.prune(base_dir)
+        sep = re.escape(os.sep)
+        self.filelist.exclude_pattern(r'(^|' + sep + r')(RCS|CVS|\.svn)' + sep,
+                                      is_regex=1)
+
+
+def write_file(filename, contents):
+    """Create a file with the specified name and write 'contents' (a
+    sequence of strings without line terminators) to it.
+    """
+    contents = "\n".join(contents)
+
+    # assuming the contents has been vetted for utf-8 encoding
+    contents = contents.encode("utf-8")
+
+    with open(filename, "wb") as f:  # always write POSIX-style manifest
+        f.write(contents)
+
+
+def write_pkg_info(cmd, basename, filename):
+    log.info("writing %s", filename)
+    if not cmd.dry_run:
+        metadata = cmd.distribution.metadata
+        metadata.version, oldver = cmd.egg_version, metadata.version
+        metadata.name, oldname = cmd.egg_name, metadata.name
+
+        try:
+            # write unescaped data to PKG-INFO, so older pkg_resources
+            # can still parse it
+            metadata.write_pkg_info(cmd.egg_info)
+        finally:
+            metadata.name, metadata.version = oldname, oldver
+
+        safe = getattr(cmd.distribution, 'zip_safe', None)
+
+        bdist_egg.write_safety_flag(cmd.egg_info, safe)
+
+
+def warn_depends_obsolete(cmd, basename, filename):
+    if os.path.exists(filename):
+        log.warn(
+            "WARNING: 'depends.txt' is not used by setuptools 0.6!\n"
+            "Use the install_requires/extras_require setup() args instead."
+        )
+
+
+def _write_requirements(stream, reqs):
+    lines = yield_lines(reqs or ())
+    append_cr = lambda line: line + '\n'
+    lines = map(append_cr, lines)
+    stream.writelines(lines)
+
+
+def write_requirements(cmd, basename, filename):
+    dist = cmd.distribution
+    data = six.StringIO()
+    _write_requirements(data, dist.install_requires)
+    extras_require = dist.extras_require or {}
+    for extra in sorted(extras_require):
+        data.write('\n[{extra}]\n'.format(**vars()))
+        _write_requirements(data, extras_require[extra])
+    cmd.write_or_delete_file("requirements", filename, data.getvalue())
+
+
+def write_setup_requirements(cmd, basename, filename):
+    data = io.StringIO()
+    _write_requirements(data, cmd.distribution.setup_requires)
+    cmd.write_or_delete_file("setup-requirements", filename, data.getvalue())
+
+
+def write_toplevel_names(cmd, basename, filename):
+    pkgs = dict.fromkeys(
+        [
+            k.split('.', 1)[0]
+            for k in cmd.distribution.iter_distribution_names()
+        ]
+    )
+    cmd.write_file("top-level names", filename, '\n'.join(sorted(pkgs)) + '\n')
+
+
+def overwrite_arg(cmd, basename, filename):
+    write_arg(cmd, basename, filename, True)
+
+
+def write_arg(cmd, basename, filename, force=False):
+    argname = os.path.splitext(basename)[0]
+    value = getattr(cmd.distribution, argname, None)
+    if value is not None:
+        value = '\n'.join(value) + '\n'
+    cmd.write_or_delete_file(argname, filename, value, force)
+
+
+def write_entries(cmd, basename, filename):
+    ep = cmd.distribution.entry_points
+
+    if isinstance(ep, six.string_types) or ep is None:
+        data = ep
+    elif ep is not None:
+        data = []
+        for section, contents in sorted(ep.items()):
+            if not isinstance(contents, six.string_types):
+                contents = EntryPoint.parse_group(section, contents)
+                contents = '\n'.join(sorted(map(str, contents.values())))
+            data.append('[%s]\n%s\n\n' % (section, contents))
+        data = ''.join(data)
+
+    cmd.write_or_delete_file('entry points', filename, data, True)
+
+
+def get_pkg_info_revision():
+    """
+    Get a -r### off of PKG-INFO Version in case this is an sdist of
+    a subversion revision.
+    """
+    warnings.warn("get_pkg_info_revision is deprecated.", EggInfoDeprecationWarning)
+    if os.path.exists('PKG-INFO'):
+        with io.open('PKG-INFO') as f:
+            for line in f:
+                match = re.match(r"Version:.*-r(\d+)\s*$", line)
+                if match:
+                    return int(match.group(1))
+    return 0
+
+
+class EggInfoDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in eggInfo in setupTools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install.py
new file mode 100644
index 00000000..31a5ddb5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install.py
@@ -0,0 +1,125 @@
+from distutils.errors import DistutilsArgError
+import inspect
+import glob
+import warnings
+import platform
+import distutils.command.install as orig
+
+import setuptools
+
+# Prior to numpy 1.9, NumPy relies on the '_install' name, so provide it for
+# now. See https://github.com/pypa/setuptools/issues/199/
+_install = orig.install
+
+
+class install(orig.install):
+    """Use easy_install to install the package, w/dependencies"""
+
+    user_options = orig.install.user_options + [
+        ('old-and-unmanageable', None, "Try not to use this!"),
+        ('single-version-externally-managed', None,
+         "used by system package builders to create 'flat' eggs"),
+    ]
+    boolean_options = orig.install.boolean_options + [
+        'old-and-unmanageable', 'single-version-externally-managed',
+    ]
+    new_commands = [
+        ('install_egg_info', lambda self: True),
+        ('install_scripts', lambda self: True),
+    ]
+    _nc = dict(new_commands)
+
+    def initialize_options(self):
+        orig.install.initialize_options(self)
+        self.old_and_unmanageable = None
+        self.single_version_externally_managed = None
+
+    def finalize_options(self):
+        orig.install.finalize_options(self)
+        if self.root:
+            self.single_version_externally_managed = True
+        elif self.single_version_externally_managed:
+            if not self.root and not self.record:
+                raise DistutilsArgError(
+                    "You must specify --record or --root when building system"
+                    " packages"
+                )
+
+    def handle_extra_path(self):
+        if self.root or self.single_version_externally_managed:
+            # explicit backward-compatibility mode, allow extra_path to work
+            return orig.install.handle_extra_path(self)
+
+        # Ignore extra_path when installing an egg (or being run by another
+        # command without --root or --single-version-externally-managed
+        self.path_file = None
+        self.extra_dirs = ''
+
+    def run(self):
+        # Explicit request for old-style install?  Just do it
+        if self.old_and_unmanageable or self.single_version_externally_managed:
+            return orig.install.run(self)
+
+        if not self._called_from_setup(inspect.currentframe()):
+            # Run in backward-compatibility mode to support bdist_* commands.
+            orig.install.run(self)
+        else:
+            self.do_egg_install()
+
+    @staticmethod
+    def _called_from_setup(run_frame):
+        """
+        Attempt to detect whether run() was called from setup() or by another
+        command.  If called by setup(), the parent caller will be the
+        'run_command' method in 'distutils.dist', and *its* caller will be
+        the 'run_commands' method.  If called any other way, the
+        immediate caller *might* be 'run_command', but it won't have been
+        called by 'run_commands'. Return True in that case or if a call stack
+        is unavailable. Return False otherwise.
+        """
+        if run_frame is None:
+            msg = "Call stack not available. bdist_* commands may fail."
+            warnings.warn(msg)
+            if platform.python_implementation() == 'IronPython':
+                msg = "For best results, pass -X:Frames to enable call stack."
+                warnings.warn(msg)
+            return True
+        res = inspect.getouterframes(run_frame)[2]
+        caller, = res[:1]
+        info = inspect.getframeinfo(caller)
+        caller_module = caller.f_globals.get('__name__', '')
+        return (
+            caller_module == 'distutils.dist'
+            and info.function == 'run_commands'
+        )
+
+    def do_egg_install(self):
+
+        easy_install = self.distribution.get_command_class('easy_install')
+
+        cmd = easy_install(
+            self.distribution, args="x", root=self.root, record=self.record,
+        )
+        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
+        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed
+
+        # pick up setup-dir .egg files only: no .egg-info
+        cmd.package_index.scan(glob.glob('*.egg'))
+
+        self.run_command('bdist_egg')
+        args = [self.distribution.get_command_obj('bdist_egg').egg_output]
+
+        if setuptools.bootstrap_install_from:
+            # Bootstrap self-installation of setuptools
+            args.insert(0, setuptools.bootstrap_install_from)
+
+        cmd.args = args
+        cmd.run()
+        setuptools.bootstrap_install_from = None
+
+
+# XXX Python 3.1 doesn't see _nc if this is inside the class
+install.sub_commands = (
+    [cmd for cmd in orig.install.sub_commands if cmd[0] not in install._nc] +
+    install.new_commands
+)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_egg_info.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_egg_info.py
new file mode 100644
index 00000000..edc4718b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_egg_info.py
@@ -0,0 +1,62 @@
+from distutils import log, dir_util
+import os
+
+from setuptools import Command
+from setuptools import namespaces
+from setuptools.archive_util import unpack_archive
+import pkg_resources
+
+
+class install_egg_info(namespaces.Installer, Command):
+    """Install an .egg-info directory for the package"""
+
+    description = "Install an .egg-info directory for the package"
+
+    user_options = [
+        ('install-dir=', 'd', "directory to install to"),
+    ]
+
+    def initialize_options(self):
+        self.install_dir = None
+
+    def finalize_options(self):
+        self.set_undefined_options('install_lib',
+                                   ('install_dir', 'install_dir'))
+        ei_cmd = self.get_finalized_command("egg_info")
+        basename = pkg_resources.Distribution(
+            None, None, ei_cmd.egg_name, ei_cmd.egg_version
+        ).egg_name() + '.egg-info'
+        self.source = ei_cmd.egg_info
+        self.target = os.path.join(self.install_dir, basename)
+        self.outputs = []
+
+    def run(self):
+        self.run_command('egg_info')
+        if os.path.isdir(self.target) and not os.path.islink(self.target):
+            dir_util.remove_tree(self.target, dry_run=self.dry_run)
+        elif os.path.exists(self.target):
+            self.execute(os.unlink, (self.target,), "Removing " + self.target)
+        if not self.dry_run:
+            pkg_resources.ensure_directory(self.target)
+        self.execute(
+            self.copytree, (), "Copying %s to %s" % (self.source, self.target)
+        )
+        self.install_namespaces()
+
+    def get_outputs(self):
+        return self.outputs
+
+    def copytree(self):
+        # Copy the .egg-info tree to site-packages
+        def skimmer(src, dst):
+            # filter out source-control directories; note that 'src' is always
+            # a '/'-separated path, regardless of platform.  'dst' is a
+            # platform-specific path.
+            for skip in '.svn/', 'CVS/':
+                if src.startswith(skip) or '/' + skip in src:
+                    return None
+            self.outputs.append(dst)
+            log.debug("Copying %s to %s", src, dst)
+            return dst
+
+        unpack_archive(self.source, self.target, skimmer)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_lib.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_lib.py
new file mode 100644
index 00000000..2b31c3e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_lib.py
@@ -0,0 +1,121 @@
+import os
+import imp
+from itertools import product, starmap
+import distutils.command.install_lib as orig
+
+
+class install_lib(orig.install_lib):
+    """Don't add compiled flags to filenames of non-Python files"""
+
+    def run(self):
+        self.build()
+        outfiles = self.install()
+        if outfiles is not None:
+            # always compile, in case we have any extension stubs to deal with
+            self.byte_compile(outfiles)
+
+    def get_exclusions(self):
+        """
+        Return a collections.Sized collections.Container of paths to be
+        excluded for single_version_externally_managed installations.
+        """
+        all_packages = (
+            pkg
+            for ns_pkg in self._get_SVEM_NSPs()
+            for pkg in self._all_packages(ns_pkg)
+        )
+
+        excl_specs = product(all_packages, self._gen_exclusion_paths())
+        return set(starmap(self._exclude_pkg_path, excl_specs))
+
+    def _exclude_pkg_path(self, pkg, exclusion_path):
+        """
+        Given a package name and exclusion path within that package,
+        compute the full exclusion path.
+        """
+        parts = pkg.split('.') + [exclusion_path]
+        return os.path.join(self.install_dir, *parts)
+
+    @staticmethod
+    def _all_packages(pkg_name):
+        """
+        >>> list(install_lib._all_packages('foo.bar.baz'))
+        ['foo.bar.baz', 'foo.bar', 'foo']
+        """
+        while pkg_name:
+            yield pkg_name
+            pkg_name, sep, child = pkg_name.rpartition('.')
+
+    def _get_SVEM_NSPs(self):
+        """
+        Get namespace packages (list) but only for
+        single_version_externally_managed installations and empty otherwise.
+        """
+        # TODO: is it necessary to short-circuit here? i.e. what's the cost
+        # if get_finalized_command is called even when namespace_packages is
+        # False?
+        if not self.distribution.namespace_packages:
+            return []
+
+        install_cmd = self.get_finalized_command('install')
+        svem = install_cmd.single_version_externally_managed
+
+        return self.distribution.namespace_packages if svem else []
+
+    @staticmethod
+    def _gen_exclusion_paths():
+        """
+        Generate file paths to be excluded for namespace packages (bytecode
+        cache files).
+        """
+        # always exclude the package module itself
+        yield '__init__.py'
+
+        yield '__init__.pyc'
+        yield '__init__.pyo'
+
+        if not hasattr(imp, 'get_tag'):
+            return
+
+        base = os.path.join('__pycache__', '__init__.' + imp.get_tag())
+        yield base + '.pyc'
+        yield base + '.pyo'
+        yield base + '.opt-1.pyc'
+        yield base + '.opt-2.pyc'
+
+    def copy_tree(
+            self, infile, outfile,
+            preserve_mode=1, preserve_times=1, preserve_symlinks=0, level=1
+    ):
+        assert preserve_mode and preserve_times and not preserve_symlinks
+        exclude = self.get_exclusions()
+
+        if not exclude:
+            return orig.install_lib.copy_tree(self, infile, outfile)
+
+        # Exclude namespace package __init__.py* files from the output
+
+        from setuptools.archive_util import unpack_directory
+        from distutils import log
+
+        outfiles = []
+
+        def pf(src, dst):
+            if dst in exclude:
+                log.warn("Skipping installation of %s (namespace package)",
+                         dst)
+                return False
+
+            log.info("copying %s -> %s", src, os.path.dirname(dst))
+            outfiles.append(dst)
+            return dst
+
+        unpack_directory(infile, outfile, pf)
+        return outfiles
+
+    def get_outputs(self):
+        outputs = orig.install_lib.get_outputs(self)
+        exclude = self.get_exclusions()
+        if exclude:
+            return [f for f in outputs if f not in exclude]
+        return outputs
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_scripts.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_scripts.py
new file mode 100644
index 00000000..16234273
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/install_scripts.py
@@ -0,0 +1,65 @@
+from distutils import log
+import distutils.command.install_scripts as orig
+import os
+import sys
+
+from pkg_resources import Distribution, PathMetadata, ensure_directory
+
+
+class install_scripts(orig.install_scripts):
+    """Do normal script install, plus any egg_info wrapper scripts"""
+
+    def initialize_options(self):
+        orig.install_scripts.initialize_options(self)
+        self.no_ep = False
+
+    def run(self):
+        import setuptools.command.easy_install as ei
+
+        self.run_command("egg_info")
+        if self.distribution.scripts:
+            orig.install_scripts.run(self)  # run first to set up self.outfiles
+        else:
+            self.outfiles = []
+        if self.no_ep:
+            # don't install entry point scripts into .egg file!
+            return
+
+        ei_cmd = self.get_finalized_command("egg_info")
+        dist = Distribution(
+            ei_cmd.egg_base, PathMetadata(ei_cmd.egg_base, ei_cmd.egg_info),
+            ei_cmd.egg_name, ei_cmd.egg_version,
+        )
+        bs_cmd = self.get_finalized_command('build_scripts')
+        exec_param = getattr(bs_cmd, 'executable', None)
+        bw_cmd = self.get_finalized_command("bdist_wininst")
+        is_wininst = getattr(bw_cmd, '_is_running', False)
+        writer = ei.ScriptWriter
+        if is_wininst:
+            exec_param = "python.exe"
+            writer = ei.WindowsScriptWriter
+        if exec_param == sys.executable:
+            # In case the path to the Python executable contains a space, wrap
+            # it so it's not split up.
+            exec_param = [exec_param]
+        # resolve the writer to the environment
+        writer = writer.best()
+        cmd = writer.command_spec_class.best().from_param(exec_param)
+        for args in writer.get_args(dist, cmd.as_header()):
+            self.write_script(*args)
+
+    def write_script(self, script_name, contents, mode="t", *ignored):
+        """Write an executable file to the scripts directory"""
+        from setuptools.command.easy_install import chmod, current_umask
+
+        log.info("Installing %s script to %s", script_name, self.install_dir)
+        target = os.path.join(self.install_dir, script_name)
+        self.outfiles.append(target)
+
+        mask = current_umask()
+        if not self.dry_run:
+            ensure_directory(target)
+            f = open(target, "w" + mode)
+            f.write(contents)
+            f.close()
+            chmod(target, 0o777 - mask)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/launcher manifest.xml b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/launcher manifest.xml
new file mode 100644
index 00000000..5972a96d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/launcher manifest.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+    <assemblyIdentity version="1.0.0.0"
+                      processorArchitecture="X86"
+                      name="%(name)s"
+                      type="win32"/>
+    <!-- Identify the application security requirements. -->
+    <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+        <security>
+            <requestedPrivileges>
+                <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+            </requestedPrivileges>
+        </security>
+    </trustInfo>
+</assembly>
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/py36compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/py36compat.py
new file mode 100644
index 00000000..61063e75
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/py36compat.py
@@ -0,0 +1,136 @@
+import os
+from glob import glob
+from distutils.util import convert_path
+from distutils.command import sdist
+
+from setuptools.extern.six.moves import filter
+
+
+class sdist_add_defaults:
+    """
+    Mix-in providing forward-compatibility for functionality as found in
+    distutils on Python 3.7.
+
+    Do not edit the code in this class except to update functionality
+    as implemented in distutils. Instead, override in the subclass.
+    """
+
+    def add_defaults(self):
+        """Add all the default files to self.filelist:
+          - README or README.txt
+          - setup.py
+          - test/test*.py
+          - all pure Python modules mentioned in setup script
+          - all files pointed by package_data (build_py)
+          - all files defined in data_files.
+          - all files defined as scripts.
+          - all C sources listed as part of extensions or C libraries
+            in the setup script (doesn't catch C headers!)
+        Warns if (README or README.txt) or setup.py are missing; everything
+        else is optional.
+        """
+        self._add_defaults_standards()
+        self._add_defaults_optional()
+        self._add_defaults_python()
+        self._add_defaults_data_files()
+        self._add_defaults_ext()
+        self._add_defaults_c_libs()
+        self._add_defaults_scripts()
+
+    @staticmethod
+    def _cs_path_exists(fspath):
+        """
+        Case-sensitive path existence check
+
+        >>> sdist_add_defaults._cs_path_exists(__file__)
+        True
+        >>> sdist_add_defaults._cs_path_exists(__file__.upper())
+        False
+        """
+        if not os.path.exists(fspath):
+            return False
+        # make absolute so we always have a directory
+        abspath = os.path.abspath(fspath)
+        directory, filename = os.path.split(abspath)
+        return filename in os.listdir(directory)
+
+    def _add_defaults_standards(self):
+        standards = [self.READMES, self.distribution.script_name]
+        for fn in standards:
+            if isinstance(fn, tuple):
+                alts = fn
+                got_it = False
+                for fn in alts:
+                    if self._cs_path_exists(fn):
+                        got_it = True
+                        self.filelist.append(fn)
+                        break
+
+                if not got_it:
+                    self.warn("standard file not found: should have one of " +
+                              ', '.join(alts))
+            else:
+                if self._cs_path_exists(fn):
+                    self.filelist.append(fn)
+                else:
+                    self.warn("standard file '%s' not found" % fn)
+
+    def _add_defaults_optional(self):
+        optional = ['test/test*.py', 'setup.cfg']
+        for pattern in optional:
+            files = filter(os.path.isfile, glob(pattern))
+            self.filelist.extend(files)
+
+    def _add_defaults_python(self):
+        # build_py is used to get:
+        #  - python modules
+        #  - files defined in package_data
+        build_py = self.get_finalized_command('build_py')
+
+        # getting python files
+        if self.distribution.has_pure_modules():
+            self.filelist.extend(build_py.get_source_files())
+
+        # getting package_data files
+        # (computed in build_py.data_files by build_py.finalize_options)
+        for pkg, src_dir, build_dir, filenames in build_py.data_files:
+            for filename in filenames:
+                self.filelist.append(os.path.join(src_dir, filename))
+
+    def _add_defaults_data_files(self):
+        # getting distribution.data_files
+        if self.distribution.has_data_files():
+            for item in self.distribution.data_files:
+                if isinstance(item, str):
+                    # plain file
+                    item = convert_path(item)
+                    if os.path.isfile(item):
+                        self.filelist.append(item)
+                else:
+                    # a (dirname, filenames) tuple
+                    dirname, filenames = item
+                    for f in filenames:
+                        f = convert_path(f)
+                        if os.path.isfile(f):
+                            self.filelist.append(f)
+
+    def _add_defaults_ext(self):
+        if self.distribution.has_ext_modules():
+            build_ext = self.get_finalized_command('build_ext')
+            self.filelist.extend(build_ext.get_source_files())
+
+    def _add_defaults_c_libs(self):
+        if self.distribution.has_c_libraries():
+            build_clib = self.get_finalized_command('build_clib')
+            self.filelist.extend(build_clib.get_source_files())
+
+    def _add_defaults_scripts(self):
+        if self.distribution.has_scripts():
+            build_scripts = self.get_finalized_command('build_scripts')
+            self.filelist.extend(build_scripts.get_source_files())
+
+
+if hasattr(sdist.sdist, '_add_defaults_standards'):
+    # disable the functionality already available upstream
+    class sdist_add_defaults:
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/register.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/register.py
new file mode 100644
index 00000000..98bc0156
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/register.py
@@ -0,0 +1,18 @@
+from distutils import log
+import distutils.command.register as orig
+
+
+class register(orig.register):
+    __doc__ = orig.register.__doc__
+
+    def run(self):
+        try:
+            # Make sure that we are using valid current name/version info
+            self.run_command('egg_info')
+            orig.register.run(self)
+        finally:
+            self.announce(
+                "WARNING: Registering is deprecated, use twine to "
+                "upload instead (https://pypi.org/p/twine/)",
+                log.WARN
+            )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/rotate.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/rotate.py
new file mode 100644
index 00000000..b89353f5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/rotate.py
@@ -0,0 +1,66 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import shutil
+
+from setuptools.extern import six
+
+from setuptools import Command
+
+
+class rotate(Command):
+    """Delete older distributions"""
+
+    description = "delete older distributions, keeping N newest files"
+    user_options = [
+        ('match=', 'm', "patterns to match (required)"),
+        ('dist-dir=', 'd', "directory where the distributions are"),
+        ('keep=', 'k', "number of matching distributions to keep"),
+    ]
+
+    boolean_options = []
+
+    def initialize_options(self):
+        self.match = None
+        self.dist_dir = None
+        self.keep = None
+
+    def finalize_options(self):
+        if self.match is None:
+            raise DistutilsOptionError(
+                "Must specify one or more (comma-separated) match patterns "
+                "(e.g. '.zip' or '.egg')"
+            )
+        if self.keep is None:
+            raise DistutilsOptionError("Must specify number of files to keep")
+        try:
+            self.keep = int(self.keep)
+        except ValueError:
+            raise DistutilsOptionError("--keep must be an integer")
+        if isinstance(self.match, six.string_types):
+            self.match = [
+                convert_path(p.strip()) for p in self.match.split(',')
+            ]
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+    def run(self):
+        self.run_command("egg_info")
+        from glob import glob
+
+        for pattern in self.match:
+            pattern = self.distribution.get_name() + '*' + pattern
+            files = glob(os.path.join(self.dist_dir, pattern))
+            files = [(os.path.getmtime(f), f) for f in files]
+            files.sort()
+            files.reverse()
+
+            log.info("%d file(s) matching %s", len(files), pattern)
+            files = files[self.keep:]
+            for (t, f) in files:
+                log.info("Deleting %s", f)
+                if not self.dry_run:
+                    if os.path.isdir(f):
+                        shutil.rmtree(f)
+                    else:
+                        os.unlink(f)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/saveopts.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/saveopts.py
new file mode 100644
index 00000000..611cec55
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/saveopts.py
@@ -0,0 +1,22 @@
+from setuptools.command.setopt import edit_config, option_base
+
+
+class saveopts(option_base):
+    """Save command-line options to a file"""
+
+    description = "save supplied options to setup.cfg or other config file"
+
+    def run(self):
+        dist = self.distribution
+        settings = {}
+
+        for cmd in dist.command_options:
+
+            if cmd == 'saveopts':
+                continue  # don't save our own options!
+
+            for opt, (src, val) in dist.get_option_dict(cmd).items():
+                if src == "command line":
+                    settings.setdefault(cmd, {})[opt] = val
+
+        edit_config(self.filename, settings, self.dry_run)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/sdist.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/sdist.py
new file mode 100644
index 00000000..dc253981
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/sdist.py
@@ -0,0 +1,221 @@
+from distutils import log
+import distutils.command.sdist as orig
+import os
+import sys
+import io
+import contextlib
+
+from setuptools.extern import six
+
+from .py36compat import sdist_add_defaults
+
+import pkg_resources
+
+_default_revctrl = list
+
+
+def walk_revctrl(dirname=''):
+    """Find all files under revision control"""
+    for ep in pkg_resources.iter_entry_points('setuptools.file_finders'):
+        for item in ep.load()(dirname):
+            yield item
+
+
+class sdist(sdist_add_defaults, orig.sdist):
+    """Smart sdist that finds anything supported by revision control"""
+
+    user_options = [
+        ('formats=', None,
+         "formats for source distribution (comma-separated list)"),
+        ('keep-temp', 'k',
+         "keep the distribution tree around after creating " +
+         "archive file(s)"),
+        ('dist-dir=', 'd',
+         "directory to put the source distribution archive(s) in "
+         "[default: dist]"),
+    ]
+
+    negative_opt = {}
+
+    README_EXTENSIONS = ['', '.rst', '.txt', '.md']
+    READMES = tuple('README{0}'.format(ext) for ext in README_EXTENSIONS)
+
+    def run(self):
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist = ei_cmd.filelist
+        self.filelist.append(os.path.join(ei_cmd.egg_info, 'SOURCES.txt'))
+        self.check_readme()
+
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        self.make_distribution()
+
+        dist_files = getattr(self.distribution, 'dist_files', [])
+        for file in self.archive_files:
+            data = ('sdist', '', file)
+            if data not in dist_files:
+                dist_files.append(data)
+
+    def initialize_options(self):
+        orig.sdist.initialize_options(self)
+
+        self._default_to_gztar()
+
+    def _default_to_gztar(self):
+        # only needed on Python prior to 3.6.
+        if sys.version_info >= (3, 6, 0, 'beta', 1):
+            return
+        self.formats = ['gztar']
+
+    def make_distribution(self):
+        """
+        Workaround for #516
+        """
+        with self._remove_os_link():
+            orig.sdist.make_distribution(self)
+
+    @staticmethod
+    @contextlib.contextmanager
+    def _remove_os_link():
+        """
+        In a context, remove and restore os.link if it exists
+        """
+
+        class NoValue:
+            pass
+
+        orig_val = getattr(os, 'link', NoValue)
+        try:
+            del os.link
+        except Exception:
+            pass
+        try:
+            yield
+        finally:
+            if orig_val is not NoValue:
+                setattr(os, 'link', orig_val)
+
+    def __read_template_hack(self):
+        # This grody hack closes the template file (MANIFEST.in) if an
+        #  exception occurs during read_template.
+        # Doing so prevents an error when easy_install attempts to delete the
+        #  file.
+        try:
+            orig.sdist.read_template(self)
+        except Exception:
+            _, _, tb = sys.exc_info()
+            tb.tb_next.tb_frame.f_locals['template'].close()
+            raise
+
+    # Beginning with Python 2.7.2, 3.1.4, and 3.2.1, this leaky file handle
+    #  has been fixed, so only override the method if we're using an earlier
+    #  Python.
+    has_leaky_handle = (
+        sys.version_info < (2, 7, 2)
+        or (3, 0) <= sys.version_info < (3, 1, 4)
+        or (3, 2) <= sys.version_info < (3, 2, 1)
+    )
+    if has_leaky_handle:
+        read_template = __read_template_hack
+
+    def _add_defaults_python(self):
+        """getting python files"""
+        if self.distribution.has_pure_modules():
+            build_py = self.get_finalized_command('build_py')
+            self.filelist.extend(build_py.get_source_files())
+            # This functionality is incompatible with include_package_data, and
+            # will in fact create an infinite recursion if include_package_data
+            # is True.  Use of include_package_data will imply that
+            # distutils-style automatic handling of package_data is disabled
+            if not self.distribution.include_package_data:
+                for _, src_dir, _, filenames in build_py.data_files:
+                    self.filelist.extend([os.path.join(src_dir, filename)
+                                          for filename in filenames])
+
+    def _add_defaults_data_files(self):
+        try:
+            if six.PY2:
+                sdist_add_defaults._add_defaults_data_files(self)
+            else:
+                super()._add_defaults_data_files()
+        except TypeError:
+            log.warn("data_files contains unexpected objects")
+
+    def check_readme(self):
+        for f in self.READMES:
+            if os.path.exists(f):
+                return
+        else:
+            self.warn(
+                "standard file not found: should have one of " +
+                ', '.join(self.READMES)
+            )
+
+    def make_release_tree(self, base_dir, files):
+        orig.sdist.make_release_tree(self, base_dir, files)
+
+        # Save any egg_info command line options used to create this sdist
+        dest = os.path.join(base_dir, 'setup.cfg')
+        if hasattr(os, 'link') and os.path.exists(dest):
+            # unlink and re-copy, since it might be hard-linked, and
+            # we don't want to change the source version
+            os.unlink(dest)
+            self.copy_file('setup.cfg', dest)
+
+        self.get_finalized_command('egg_info').save_version_info(dest)
+
+    def _manifest_is_not_generated(self):
+        # check for special comment used in 2.7.1 and higher
+        if not os.path.isfile(self.manifest):
+            return False
+
+        with io.open(self.manifest, 'rb') as fp:
+            first_line = fp.readline()
+        return (first_line !=
+                '# file GENERATED by distutils, do NOT edit\n'.encode())
+
+    def read_manifest(self):
+        """Read the manifest file (named by 'self.manifest') and use it to
+        fill in 'self.filelist', the list of files to include in the source
+        distribution.
+        """
+        log.info("reading manifest file '%s'", self.manifest)
+        manifest = open(self.manifest, 'rb')
+        for line in manifest:
+            # The manifest must contain UTF-8. See #303.
+            if six.PY3:
+                try:
+                    line = line.decode('UTF-8')
+                except UnicodeDecodeError:
+                    log.warn("%r not UTF-8 decodable -- skipping" % line)
+                    continue
+            # ignore comments and blank lines
+            line = line.strip()
+            if line.startswith('#') or not line:
+                continue
+            self.filelist.append(line)
+        manifest.close()
+
+    def check_license(self):
+        """Checks if license_file' is configured and adds it to
+        'self.filelist' if the value contains a valid path.
+        """
+
+        opts = self.distribution.get_option_dict('metadata')
+
+        # ignore the source of the value
+        _, license_file = opts.get('license_file', (None, None))
+
+        if license_file is None:
+            log.debug("'license_file' option was not specified")
+            return
+
+        if not os.path.exists(license_file):
+            log.warn("warning: Failed to find the configured license file '%s'",
+                    license_file)
+            return
+
+        self.filelist.append(license_file)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/setopt.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/setopt.py
new file mode 100644
index 00000000..7e57cc02
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/setopt.py
@@ -0,0 +1,149 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import distutils
+import os
+
+from setuptools.extern.six.moves import configparser
+
+from setuptools import Command
+
+__all__ = ['config_file', 'edit_config', 'option_base', 'setopt']
+
+
+def config_file(kind="local"):
+    """Get the filename of the distutils, local, global, or per-user config
+
+    `kind` must be one of "local", "global", or "user"
+    """
+    if kind == 'local':
+        return 'setup.cfg'
+    if kind == 'global':
+        return os.path.join(
+            os.path.dirname(distutils.__file__), 'distutils.cfg'
+        )
+    if kind == 'user':
+        dot = os.name == 'posix' and '.' or ''
+        return os.path.expanduser(convert_path("~/%spydistutils.cfg" % dot))
+    raise ValueError(
+        "config_file() type must be 'local', 'global', or 'user'", kind
+    )
+
+
+def edit_config(filename, settings, dry_run=False):
+    """Edit a configuration file to include `settings`
+
+    `settings` is a dictionary of dictionaries or ``None`` values, keyed by
+    command/section name.  A ``None`` value means to delete the entire section,
+    while a dictionary lists settings to be changed or deleted in that section.
+    A setting of ``None`` means to delete that setting.
+    """
+    log.debug("Reading configuration from %s", filename)
+    opts = configparser.RawConfigParser()
+    opts.read([filename])
+    for section, options in settings.items():
+        if options is None:
+            log.info("Deleting section [%s] from %s", section, filename)
+            opts.remove_section(section)
+        else:
+            if not opts.has_section(section):
+                log.debug("Adding new section [%s] to %s", section, filename)
+                opts.add_section(section)
+            for option, value in options.items():
+                if value is None:
+                    log.debug(
+                        "Deleting %s.%s from %s",
+                        section, option, filename
+                    )
+                    opts.remove_option(section, option)
+                    if not opts.options(section):
+                        log.info("Deleting empty [%s] section from %s",
+                                 section, filename)
+                        opts.remove_section(section)
+                else:
+                    log.debug(
+                        "Setting %s.%s to %r in %s",
+                        section, option, value, filename
+                    )
+                    opts.set(section, option, value)
+
+    log.info("Writing %s", filename)
+    if not dry_run:
+        with open(filename, 'w') as f:
+            opts.write(f)
+
+
+class option_base(Command):
+    """Abstract base class for commands that mess with config files"""
+
+    user_options = [
+        ('global-config', 'g',
+         "save options to the site-wide distutils.cfg file"),
+        ('user-config', 'u',
+         "save options to the current user's pydistutils.cfg file"),
+        ('filename=', 'f',
+         "configuration file to use (default=setup.cfg)"),
+    ]
+
+    boolean_options = [
+        'global-config', 'user-config',
+    ]
+
+    def initialize_options(self):
+        self.global_config = None
+        self.user_config = None
+        self.filename = None
+
+    def finalize_options(self):
+        filenames = []
+        if self.global_config:
+            filenames.append(config_file('global'))
+        if self.user_config:
+            filenames.append(config_file('user'))
+        if self.filename is not None:
+            filenames.append(self.filename)
+        if not filenames:
+            filenames.append(config_file('local'))
+        if len(filenames) > 1:
+            raise DistutilsOptionError(
+                "Must specify only one configuration file option",
+                filenames
+            )
+        self.filename, = filenames
+
+
+class setopt(option_base):
+    """Save command-line options to a file"""
+
+    description = "set an option in setup.cfg or another config file"
+
+    user_options = [
+        ('command=', 'c', 'command to set an option for'),
+        ('option=', 'o', 'option to set'),
+        ('set-value=', 's', 'value of the option'),
+        ('remove', 'r', 'remove (unset) the value'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.command = None
+        self.option = None
+        self.set_value = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.command is None or self.option is None:
+            raise DistutilsOptionError("Must specify --command *and* --option")
+        if self.set_value is None and not self.remove:
+            raise DistutilsOptionError("Must specify --set-value or --remove")
+
+    def run(self):
+        edit_config(
+            self.filename, {
+                self.command: {self.option.replace('-', '_'): self.set_value}
+            },
+            self.dry_run
+        )
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/test.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/test.py
new file mode 100644
index 00000000..973e4eb2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/test.py
@@ -0,0 +1,271 @@
+import os
+import operator
+import sys
+import contextlib
+import itertools
+import unittest
+from distutils.errors import DistutilsError, DistutilsOptionError
+from distutils import log
+from unittest import TestLoader
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter
+
+from pkg_resources import (resource_listdir, resource_exists, normalize_path,
+                           working_set, _namespace_packages, evaluate_marker,
+                           add_activation_listener, require, EntryPoint)
+from setuptools import Command
+from .build_py import _unique_everseen
+
+__metaclass__ = type
+
+
+class ScanningLoader(TestLoader):
+
+    def __init__(self):
+        TestLoader.__init__(self)
+        self._visited = set()
+
+    def loadTestsFromModule(self, module, pattern=None):
+        """Return a suite of all tests cases contained in the given module
+
+        If the module is a package, load tests from all the modules in it.
+        If the module has an ``additional_tests`` function, call it and add
+        the return value to the tests.
+        """
+        if module in self._visited:
+            return None
+        self._visited.add(module)
+
+        tests = []
+        tests.append(TestLoader.loadTestsFromModule(self, module))
+
+        if hasattr(module, "additional_tests"):
+            tests.append(module.additional_tests())
+
+        if hasattr(module, '__path__'):
+            for file in resource_listdir(module.__name__, ''):
+                if file.endswith('.py') and file != '__init__.py':
+                    submodule = module.__name__ + '.' + file[:-3]
+                else:
+                    if resource_exists(module.__name__, file + '/__init__.py'):
+                        submodule = module.__name__ + '.' + file
+                    else:
+                        continue
+                tests.append(self.loadTestsFromName(submodule))
+
+        if len(tests) != 1:
+            return self.suiteClass(tests)
+        else:
+            return tests[0]  # don't create a nested suite for only one return
+
+
+# adapted from jaraco.classes.properties:NonDataProperty
+class NonDataProperty:
+    def __init__(self, fget):
+        self.fget = fget
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return self
+        return self.fget(obj)
+
+
+class test(Command):
+    """Command to run unit tests after in-place build"""
+
+    description = "run unit tests after in-place build"
+
+    user_options = [
+        ('test-module=', 'm', "Run 'test_suite' in specified module"),
+        ('test-suite=', 's',
+         "Run single test, case or suite (e.g. 'module.test_suite')"),
+        ('test-runner=', 'r', "Test runner to use"),
+    ]
+
+    def initialize_options(self):
+        self.test_suite = None
+        self.test_module = None
+        self.test_loader = None
+        self.test_runner = None
+
+    def finalize_options(self):
+
+        if self.test_suite and self.test_module:
+            msg = "You may specify a module or a suite, but not both"
+            raise DistutilsOptionError(msg)
+
+        if self.test_suite is None:
+            if self.test_module is None:
+                self.test_suite = self.distribution.test_suite
+            else:
+                self.test_suite = self.test_module + ".test_suite"
+
+        if self.test_loader is None:
+            self.test_loader = getattr(self.distribution, 'test_loader', None)
+        if self.test_loader is None:
+            self.test_loader = "setuptools.command.test:ScanningLoader"
+        if self.test_runner is None:
+            self.test_runner = getattr(self.distribution, 'test_runner', None)
+
+    @NonDataProperty
+    def test_args(self):
+        return list(self._test_args())
+
+    def _test_args(self):
+        if not self.test_suite and sys.version_info >= (2, 7):
+            yield 'discover'
+        if self.verbose:
+            yield '--verbose'
+        if self.test_suite:
+            yield self.test_suite
+
+    def with_project_on_sys_path(self, func):
+        """
+        Backward compatibility for project_on_sys_path context.
+        """
+        with self.project_on_sys_path():
+            func()
+
+    @contextlib.contextmanager
+    def project_on_sys_path(self, include_dists=[]):
+        with_2to3 = six.PY3 and getattr(self.distribution, 'use_2to3', False)
+
+        if with_2to3:
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        ei_cmd = self.get_finalized_command("egg_info")
+
+        old_path = sys.path[:]
+        old_modules = sys.modules.copy()
+
+        try:
+            project_path = normalize_path(ei_cmd.egg_base)
+            sys.path.insert(0, project_path)
+            working_set.__init__()
+            add_activation_listener(lambda dist: dist.activate())
+            require('%s==%s' % (ei_cmd.egg_name, ei_cmd.egg_version))
+            with self.paths_on_pythonpath([project_path]):
+                yield
+        finally:
+            sys.path[:] = old_path
+            sys.modules.clear()
+            sys.modules.update(old_modules)
+            working_set.__init__()
+
+    @staticmethod
+    @contextlib.contextmanager
+    def paths_on_pythonpath(paths):
+        """
+        Add the indicated paths to the head of the PYTHONPATH environment
+        variable so that subprocesses will also see the packages at
+        these paths.
+
+        Do this in a context that restores the value on exit.
+        """
+        nothing = object()
+        orig_pythonpath = os.environ.get('PYTHONPATH', nothing)
+        current_pythonpath = os.environ.get('PYTHONPATH', '')
+        try:
+            prefix = os.pathsep.join(_unique_everseen(paths))
+            to_join = filter(None, [prefix, current_pythonpath])
+            new_path = os.pathsep.join(to_join)
+            if new_path:
+                os.environ['PYTHONPATH'] = new_path
+            yield
+        finally:
+            if orig_pythonpath is nothing:
+                os.environ.pop('PYTHONPATH', None)
+            else:
+                os.environ['PYTHONPATH'] = orig_pythonpath
+
+    @staticmethod
+    def install_dists(dist):
+        """
+        Install the requirements indicated by self.distribution and
+        return an iterable of the dists that were built.
+        """
+        ir_d = dist.fetch_build_eggs(dist.install_requires)
+        tr_d = dist.fetch_build_eggs(dist.tests_require or [])
+        er_d = dist.fetch_build_eggs(
+            v for k, v in dist.extras_require.items()
+            if k.startswith(':') and evaluate_marker(k[1:])
+        )
+        return itertools.chain(ir_d, tr_d, er_d)
+
+    def run(self):
+        installed_dists = self.install_dists(self.distribution)
+
+        cmd = ' '.join(self._argv)
+        if self.dry_run:
+            self.announce('skipping "%s" (dry run)' % cmd)
+            return
+
+        self.announce('running "%s"' % cmd)
+
+        paths = map(operator.attrgetter('location'), installed_dists)
+        with self.paths_on_pythonpath(paths):
+            with self.project_on_sys_path():
+                self.run_tests()
+
+    def run_tests(self):
+        # Purge modules under test from sys.modules. The test loader will
+        # re-import them from the build location. Required when 2to3 is used
+        # with namespace packages.
+        if six.PY3 and getattr(self.distribution, 'use_2to3', False):
+            module = self.test_suite.split('.')[0]
+            if module in _namespace_packages:
+                del_modules = []
+                if module in sys.modules:
+                    del_modules.append(module)
+                module += '.'
+                for name in sys.modules:
+                    if name.startswith(module):
+                        del_modules.append(name)
+                list(map(sys.modules.__delitem__, del_modules))
+
+        test = unittest.main(
+            None, None, self._argv,
+            testLoader=self._resolve_as_ep(self.test_loader),
+            testRunner=self._resolve_as_ep(self.test_runner),
+            exit=False,
+        )
+        if not test.result.wasSuccessful():
+            msg = 'Test failed: %s' % test.result
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
+    @property
+    def _argv(self):
+        return ['unittest'] + self.test_args
+
+    @staticmethod
+    def _resolve_as_ep(val):
+        """
+        Load the indicated attribute value, called, as a as if it were
+        specified as an entry point.
+        """
+        if val is None:
+            return
+        parsed = EntryPoint.parse("x=" + val)
+        return parsed.resolve()()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload.py
new file mode 100644
index 00000000..6db8888b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload.py
@@ -0,0 +1,196 @@
+import io
+import os
+import hashlib
+import getpass
+
+from base64 import standard_b64encode
+
+from distutils import log
+from distutils.command import upload as orig
+from distutils.spawn import spawn
+
+from distutils.errors import DistutilsError
+
+from setuptools.extern.six.moves.urllib.request import urlopen, Request
+from setuptools.extern.six.moves.urllib.error import HTTPError
+from setuptools.extern.six.moves.urllib.parse import urlparse
+
+
+class upload(orig.upload):
+    """
+    Override default upload behavior to obtain password
+    in a variety of different ways.
+    """
+    def run(self):
+        try:
+            orig.upload.run(self)
+        finally:
+            self.announce(
+                "WARNING: Uploading via this command is deprecated, use twine "
+                "to upload instead (https://pypi.org/p/twine/)",
+                log.WARN
+            )
+
+    def finalize_options(self):
+        orig.upload.finalize_options(self)
+        self.username = (
+            self.username or
+            getpass.getuser()
+        )
+        # Attempt to obtain password. Short circuit evaluation at the first
+        # sign of success.
+        self.password = (
+            self.password or
+            self._load_password_from_keyring() or
+            self._prompt_for_password()
+        )
+
+    def upload_file(self, command, pyversion, filename):
+        # Makes sure the repository URL is compliant
+        schema, netloc, url, params, query, fragments = \
+            urlparse(self.repository)
+        if params or query or fragments:
+            raise AssertionError("Incompatible url %s" % self.repository)
+
+        if schema not in ('http', 'https'):
+            raise AssertionError("unsupported schema " + schema)
+
+        # Sign if requested
+        if self.sign:
+            gpg_args = ["gpg", "--detach-sign", "-a", filename]
+            if self.identity:
+                gpg_args[2:2] = ["--local-user", self.identity]
+            spawn(gpg_args,
+                  dry_run=self.dry_run)
+
+        # Fill in the data - send all the meta-data in case we need to
+        # register a new release
+        with open(filename, 'rb') as f:
+            content = f.read()
+
+        meta = self.distribution.metadata
+
+        data = {
+            # action
+            ':action': 'file_upload',
+            'protocol_version': '1',
+
+            # identify release
+            'name': meta.get_name(),
+            'version': meta.get_version(),
+
+            # file content
+            'content': (os.path.basename(filename), content),
+            'filetype': command,
+            'pyversion': pyversion,
+            'md5_digest': hashlib.md5(content).hexdigest(),
+
+            # additional meta-data
+            'metadata_version': str(meta.get_metadata_version()),
+            'summary': meta.get_description(),
+            'home_page': meta.get_url(),
+            'author': meta.get_contact(),
+            'author_email': meta.get_contact_email(),
+            'license': meta.get_licence(),
+            'description': meta.get_long_description(),
+            'keywords': meta.get_keywords(),
+            'platform': meta.get_platforms(),
+            'classifiers': meta.get_classifiers(),
+            'download_url': meta.get_download_url(),
+            # PEP 314
+            'provides': meta.get_provides(),
+            'requires': meta.get_requires(),
+            'obsoletes': meta.get_obsoletes(),
+            }
+
+        data['comment'] = ''
+
+        if self.sign:
+            data['gpg_signature'] = (os.path.basename(filename) + ".asc",
+                                     open(filename+".asc", "rb").read())
+
+        # set up the authentication
+        user_pass = (self.username + ":" + self.password).encode('ascii')
+        # The exact encoding of the authentication string is debated.
+        # Anyway PyPI only accepts ascii for both username or password.
+        auth = "Basic " + standard_b64encode(user_pass).decode('ascii')
+
+        # Build up the MIME payload for the POST data
+        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\r\n--' + boundary.encode('ascii')
+        end_boundary = sep_boundary + b'--\r\n'
+        body = io.BytesIO()
+        for key, value in data.items():
+            title = '\r\nContent-Disposition: form-data; name="%s"' % key
+            # handle multiple entries for the same name
+            if not isinstance(value, list):
+                value = [value]
+            for value in value:
+                if type(value) is tuple:
+                    title += '; filename="%s"' % value[0]
+                    value = value[1]
+                else:
+                    value = str(value).encode('utf-8')
+                body.write(sep_boundary)
+                body.write(title.encode('utf-8'))
+                body.write(b"\r\n\r\n")
+                body.write(value)
+        body.write(end_boundary)
+        body = body.getvalue()
+
+        msg = "Submitting %s to %s" % (filename, self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        headers = {
+            'Content-type': 'multipart/form-data; boundary=%s' % boundary,
+            'Content-length': str(len(body)),
+            'Authorization': auth,
+        }
+
+        request = Request(self.repository, data=body,
+                          headers=headers)
+        # send the data
+        try:
+            result = urlopen(request)
+            status = result.getcode()
+            reason = result.msg
+        except HTTPError as e:
+            status = e.code
+            reason = e.msg
+        except OSError as e:
+            self.announce(str(e), log.ERROR)
+            raise
+
+        if status == 200:
+            self.announce('Server response (%s): %s' % (status, reason),
+                          log.INFO)
+            if self.show_response:
+                text = getattr(self, '_read_pypi_response',
+                               lambda x: None)(result)
+                if text is not None:
+                    msg = '\n'.join(('-' * 75, text, '-' * 75))
+                    self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (status, reason)
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
+    def _load_password_from_keyring(self):
+        """
+        Attempt to load password from keyring. Suppress Exceptions.
+        """
+        try:
+            keyring = __import__('keyring')
+            return keyring.get_password(self.repository, self.username)
+        except Exception:
+            pass
+
+    def _prompt_for_password(self):
+        """
+        Prompt for a password on the tty. Suppress Exceptions.
+        """
+        try:
+            return getpass.getpass()
+        except (Exception, KeyboardInterrupt):
+            pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload_docs.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload_docs.py
new file mode 100644
index 00000000..07aa564a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/command/upload_docs.py
@@ -0,0 +1,206 @@
+# -*- coding: utf-8 -*-
+"""upload_docs
+
+Implements a Distutils 'upload_docs' subcommand (upload documentation to
+PyPI's pythonhosted.org).
+"""
+
+from base64 import standard_b64encode
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import socket
+import zipfile
+import tempfile
+import shutil
+import itertools
+import functools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import http_client, urllib
+
+from pkg_resources import iter_entry_points
+from .upload import upload
+
+
+def _encode(s):
+    errors = 'surrogateescape' if six.PY3 else 'strict'
+    return s.encode('utf-8', errors)
+
+
+class upload_docs(upload):
+    # override the default repository as upload_docs isn't
+    # supported by Warehouse (and won't be).
+    DEFAULT_REPOSITORY = 'https://pypi.python.org/pypi/'
+
+    description = 'Upload documentation to PyPI'
+
+    user_options = [
+        ('repository=', 'r',
+         "url of repository [default: %s]" % upload.DEFAULT_REPOSITORY),
+        ('show-response', None,
+         'display full response text from server'),
+        ('upload-dir=', None, 'directory to upload'),
+    ]
+    boolean_options = upload.boolean_options
+
+    def has_sphinx(self):
+        if self.upload_dir is None:
+            for ep in iter_entry_points('distutils.commands', 'build_sphinx'):
+                return True
+
+    sub_commands = [('build_sphinx', has_sphinx)]
+
+    def initialize_options(self):
+        upload.initialize_options(self)
+        self.upload_dir = None
+        self.target_dir = None
+
+    def finalize_options(self):
+        upload.finalize_options(self)
+        if self.upload_dir is None:
+            if self.has_sphinx():
+                build_sphinx = self.get_finalized_command('build_sphinx')
+                self.target_dir = build_sphinx.builder_target_dir
+            else:
+                build = self.get_finalized_command('build')
+                self.target_dir = os.path.join(build.build_base, 'docs')
+        else:
+            self.ensure_dirname('upload_dir')
+            self.target_dir = self.upload_dir
+        if 'pypi.python.org' in self.repository:
+            log.warn("Upload_docs command is deprecated. Use RTD instead.")
+        self.announce('Using upload directory %s' % self.target_dir)
+
+    def create_zipfile(self, filename):
+        zip_file = zipfile.ZipFile(filename, "w")
+        try:
+            self.mkpath(self.target_dir)  # just in case
+            for root, dirs, files in os.walk(self.target_dir):
+                if root == self.target_dir and not files:
+                    tmpl = "no files found in upload directory '%s'"
+                    raise DistutilsOptionError(tmpl % self.target_dir)
+                for name in files:
+                    full = os.path.join(root, name)
+                    relative = root[len(self.target_dir):].lstrip(os.path.sep)
+                    dest = os.path.join(relative, name)
+                    zip_file.write(full, dest)
+        finally:
+            zip_file.close()
+
+    def run(self):
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        tmp_dir = tempfile.mkdtemp()
+        name = self.distribution.metadata.get_name()
+        zip_file = os.path.join(tmp_dir, "%s.zip" % name)
+        try:
+            self.create_zipfile(zip_file)
+            self.upload_file(zip_file)
+        finally:
+            shutil.rmtree(tmp_dir)
+
+    @staticmethod
+    def _build_part(item, sep_boundary):
+        key, values = item
+        title = '\nContent-Disposition: form-data; name="%s"' % key
+        # handle multiple entries for the same name
+        if not isinstance(values, list):
+            values = [values]
+        for value in values:
+            if isinstance(value, tuple):
+                title += '; filename="%s"' % value[0]
+                value = value[1]
+            else:
+                value = _encode(value)
+            yield sep_boundary
+            yield _encode(title)
+            yield b"\n\n"
+            yield value
+            if value and value[-1:] == b'\r':
+                yield b'\n'  # write an extra newline (lurve Macs)
+
+    @classmethod
+    def _build_multipart(cls, data):
+        """
+        Build up the MIME payload for the POST data
+        """
+        boundary = b'--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\n--' + boundary
+        end_boundary = sep_boundary + b'--'
+        end_items = end_boundary, b"\n",
+        builder = functools.partial(
+            cls._build_part,
+            sep_boundary=sep_boundary,
+        )
+        part_groups = map(builder, data.items())
+        parts = itertools.chain.from_iterable(part_groups)
+        body_items = itertools.chain(parts, end_items)
+        content_type = 'multipart/form-data; boundary=%s' % boundary.decode('ascii')
+        return b''.join(body_items), content_type
+
+    def upload_file(self, filename):
+        with open(filename, 'rb') as f:
+            content = f.read()
+        meta = self.distribution.metadata
+        data = {
+            ':action': 'doc_upload',
+            'name': meta.get_name(),
+            'content': (os.path.basename(filename), content),
+        }
+        # set up the authentication
+        credentials = _encode(self.username + ':' + self.password)
+        credentials = standard_b64encode(credentials)
+        if six.PY3:
+            credentials = credentials.decode('ascii')
+        auth = "Basic " + credentials
+
+        body, ct = self._build_multipart(data)
+
+        msg = "Submitting documentation to %s" % (self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        # We can't use urllib2 since we need to send the Basic
+        # auth right with the first request
+        schema, netloc, url, params, query, fragments = \
+            urllib.parse.urlparse(self.repository)
+        assert not params and not query and not fragments
+        if schema == 'http':
+            conn = http_client.HTTPConnection(netloc)
+        elif schema == 'https':
+            conn = http_client.HTTPSConnection(netloc)
+        else:
+            raise AssertionError("unsupported schema " + schema)
+
+        data = ''
+        try:
+            conn.connect()
+            conn.putrequest("POST", url)
+            content_type = ct
+            conn.putheader('Content-type', content_type)
+            conn.putheader('Content-length', str(len(body)))
+            conn.putheader('Authorization', auth)
+            conn.endheaders()
+            conn.send(body)
+        except socket.error as e:
+            self.announce(str(e), log.ERROR)
+            return
+
+        r = conn.getresponse()
+        if r.status == 200:
+            msg = 'Server response (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.INFO)
+        elif r.status == 301:
+            location = r.getheader('Location')
+            if location is None:
+                location = 'https://pythonhosted.org/%s/' % meta.get_name()
+            msg = 'Upload successful. Visit %s' % location
+            self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.ERROR)
+        if self.show_response:
+            print('-' * 75, r.read(), '-' * 75)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/config.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/config.py
new file mode 100644
index 00000000..b6626043
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/config.py
@@ -0,0 +1,656 @@
+from __future__ import absolute_import, unicode_literals
+import io
+import os
+import sys
+
+import warnings
+import functools
+from collections import defaultdict
+from functools import partial
+from functools import wraps
+from importlib import import_module
+
+from distutils.errors import DistutilsOptionError, DistutilsFileError
+from setuptools.extern.packaging.version import LegacyVersion, parse
+from setuptools.extern.six import string_types, PY3
+
+
+__metaclass__ = type
+
+
+def read_configuration(
+        filepath, find_others=False, ignore_option_errors=False):
+    """Read given configuration file and returns options from it as a dict.
+
+    :param str|unicode filepath: Path to configuration file
+        to get options from.
+
+    :param bool find_others: Whether to search for other configuration files
+        which could be on in various places.
+
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+
+    :rtype: dict
+    """
+    from setuptools.dist import Distribution, _Distribution
+
+    filepath = os.path.abspath(filepath)
+
+    if not os.path.isfile(filepath):
+        raise DistutilsFileError(
+            'Configuration file %s does not exist.' % filepath)
+
+    current_directory = os.getcwd()
+    os.chdir(os.path.dirname(filepath))
+
+    try:
+        dist = Distribution()
+
+        filenames = dist.find_config_files() if find_others else []
+        if filepath not in filenames:
+            filenames.append(filepath)
+
+        _Distribution.parse_config_files(dist, filenames=filenames)
+
+        handlers = parse_configuration(
+            dist, dist.command_options,
+            ignore_option_errors=ignore_option_errors)
+
+    finally:
+        os.chdir(current_directory)
+
+    return configuration_to_dict(handlers)
+
+
+def _get_option(target_obj, key):
+    """
+    Given a target object and option key, get that option from
+    the target object, either through a get_{key} method or
+    from an attribute directly.
+    """
+    getter_name = 'get_{key}'.format(**locals())
+    by_attribute = functools.partial(getattr, target_obj, key)
+    getter = getattr(target_obj, getter_name, by_attribute)
+    return getter()
+
+
+def configuration_to_dict(handlers):
+    """Returns configuration data gathered by given handlers as a dict.
+
+    :param list[ConfigHandler] handlers: Handlers list,
+        usually from parse_configuration()
+
+    :rtype: dict
+    """
+    config_dict = defaultdict(dict)
+
+    for handler in handlers:
+        for option in handler.set_options:
+            value = _get_option(handler.target_obj, option)
+            config_dict[handler.section_prefix][option] = value
+
+    return config_dict
+
+
+def parse_configuration(
+        distribution, command_options, ignore_option_errors=False):
+    """Performs additional parsing of configuration options
+    for a distribution.
+
+    Returns a list of used option handlers.
+
+    :param Distribution distribution:
+    :param dict command_options:
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+    :rtype: list
+    """
+    options = ConfigOptionsHandler(
+        distribution, command_options, ignore_option_errors)
+    options.parse()
+
+    meta = ConfigMetadataHandler(
+        distribution.metadata, command_options, ignore_option_errors,
+        distribution.package_dir)
+    meta.parse()
+
+    return meta, options
+
+
+class ConfigHandler:
+    """Handles metadata supplied in configuration files."""
+
+    section_prefix = None
+    """Prefix for config sections handled by this handler.
+    Must be provided by class heirs.
+
+    """
+
+    aliases = {}
+    """Options aliases.
+    For compatibility with various packages. E.g.: d2to1 and pbr.
+    Note: `-` in keys is replaced with `_` by config parser.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False):
+        sections = {}
+
+        section_prefix = self.section_prefix
+        for section_name, section_options in options.items():
+            if not section_name.startswith(section_prefix):
+                continue
+
+            section_name = section_name.replace(section_prefix, '').strip('.')
+            sections[section_name] = section_options
+
+        self.ignore_option_errors = ignore_option_errors
+        self.target_obj = target_obj
+        self.sections = sections
+        self.set_options = []
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        raise NotImplementedError(
+            '%s must provide .parsers property' % self.__class__.__name__)
+
+    def __setitem__(self, option_name, value):
+        unknown = tuple()
+        target_obj = self.target_obj
+
+        # Translate alias into real name.
+        option_name = self.aliases.get(option_name, option_name)
+
+        current_value = getattr(target_obj, option_name, unknown)
+
+        if current_value is unknown:
+            raise KeyError(option_name)
+
+        if current_value:
+            # Already inhabited. Skipping.
+            return
+
+        skip_option = False
+        parser = self.parsers.get(option_name)
+        if parser:
+            try:
+                value = parser(value)
+
+            except Exception:
+                skip_option = True
+                if not self.ignore_option_errors:
+                    raise
+
+        if skip_option:
+            return
+
+        setter = getattr(target_obj, 'set_%s' % option_name, None)
+        if setter is None:
+            setattr(target_obj, option_name, value)
+        else:
+            setter(value)
+
+        self.set_options.append(option_name)
+
+    @classmethod
+    def _parse_list(cls, value, separator=','):
+        """Represents value as a list.
+
+        Value is split either by separator (defaults to comma) or by lines.
+
+        :param value:
+        :param separator: List items separator character.
+        :rtype: list
+        """
+        if isinstance(value, list):  # _get_parser_compound case
+            return value
+
+        if '\n' in value:
+            value = value.splitlines()
+        else:
+            value = value.split(separator)
+
+        return [chunk.strip() for chunk in value if chunk.strip()]
+
+    @classmethod
+    def _parse_dict(cls, value):
+        """Represents value as a dict.
+
+        :param value:
+        :rtype: dict
+        """
+        separator = '='
+        result = {}
+        for line in cls._parse_list(value):
+            key, sep, val = line.partition(separator)
+            if sep != separator:
+                raise DistutilsOptionError(
+                    'Unable to parse option value to dict: %s' % value)
+            result[key.strip()] = val.strip()
+
+        return result
+
+    @classmethod
+    def _parse_bool(cls, value):
+        """Represents value as boolean.
+
+        :param value:
+        :rtype: bool
+        """
+        value = value.lower()
+        return value in ('1', 'true', 'yes')
+
+    @classmethod
+    def _exclude_files_parser(cls, key):
+        """Returns a parser function to make sure field inputs
+        are not files.
+
+        Parses a value after getting the key so error messages are
+        more informative.
+
+        :param key:
+        :rtype: callable
+        """
+        def parser(value):
+            exclude_directive = 'file:'
+            if value.startswith(exclude_directive):
+                raise ValueError(
+                    'Only strings are accepted for the {0} field, '
+                    'files are not accepted'.format(key))
+            return value
+        return parser
+
+    @classmethod
+    def _parse_file(cls, value):
+        """Represents value as a string, allowing including text
+        from nearest files using `file:` directive.
+
+        Directive is sandboxed and won't reach anything outside
+        directory with setup.py.
+
+        Examples:
+            file: README.rst, CHANGELOG.md, src/file.txt
+
+        :param str value:
+        :rtype: str
+        """
+        include_directive = 'file:'
+
+        if not isinstance(value, string_types):
+            return value
+
+        if not value.startswith(include_directive):
+            return value
+
+        spec = value[len(include_directive):]
+        filepaths = (os.path.abspath(path.strip()) for path in spec.split(','))
+        return '\n'.join(
+            cls._read_file(path)
+            for path in filepaths
+            if (cls._assert_local(path) or True)
+            and os.path.isfile(path)
+        )
+
+    @staticmethod
+    def _assert_local(filepath):
+        if not filepath.startswith(os.getcwd()):
+            raise DistutilsOptionError(
+                '`file:` directive can not access %s' % filepath)
+
+    @staticmethod
+    def _read_file(filepath):
+        with io.open(filepath, encoding='utf-8') as f:
+            return f.read()
+
+    @classmethod
+    def _parse_attr(cls, value, package_dir=None):
+        """Represents value as a module attribute.
+
+        Examples:
+            attr: package.attr
+            attr: package.module.attr
+
+        :param str value:
+        :rtype: str
+        """
+        attr_directive = 'attr:'
+        if not value.startswith(attr_directive):
+            return value
+
+        attrs_path = value.replace(attr_directive, '').strip().split('.')
+        attr_name = attrs_path.pop()
+
+        module_name = '.'.join(attrs_path)
+        module_name = module_name or '__init__'
+
+        parent_path = os.getcwd()
+        if package_dir:
+            if attrs_path[0] in package_dir:
+                # A custom path was specified for the module we want to import
+                custom_path = package_dir[attrs_path[0]]
+                parts = custom_path.rsplit('/', 1)
+                if len(parts) > 1:
+                    parent_path = os.path.join(os.getcwd(), parts[0])
+                    module_name = parts[1]
+                else:
+                    module_name = custom_path
+            elif '' in package_dir:
+                # A custom parent directory was specified for all root modules
+                parent_path = os.path.join(os.getcwd(), package_dir[''])
+        sys.path.insert(0, parent_path)
+        try:
+            module = import_module(module_name)
+            value = getattr(module, attr_name)
+
+        finally:
+            sys.path = sys.path[1:]
+
+        return value
+
+    @classmethod
+    def _get_parser_compound(cls, *parse_methods):
+        """Returns parser function to represents value as a list.
+
+        Parses a value applying given methods one after another.
+
+        :param parse_methods:
+        :rtype: callable
+        """
+        def parse(value):
+            parsed = value
+
+            for method in parse_methods:
+                parsed = method(parsed)
+
+            return parsed
+
+        return parse
+
+    @classmethod
+    def _parse_section_to_dict(cls, section_options, values_parser=None):
+        """Parses section options into a dictionary.
+
+        Optionally applies a given parser to values.
+
+        :param dict section_options:
+        :param callable values_parser:
+        :rtype: dict
+        """
+        value = {}
+        values_parser = values_parser or (lambda val: val)
+        for key, (_, val) in section_options.items():
+            value[key] = values_parser(val)
+        return value
+
+    def parse_section(self, section_options):
+        """Parses configuration file section.
+
+        :param dict section_options:
+        """
+        for (name, (_, value)) in section_options.items():
+            try:
+                self[name] = value
+
+            except KeyError:
+                pass  # Keep silent for a new option may appear anytime.
+
+    def parse(self):
+        """Parses configuration file items from one
+        or more related sections.
+
+        """
+        for section_name, section_options in self.sections.items():
+
+            method_postfix = ''
+            if section_name:  # [section.option] variant
+                method_postfix = '_%s' % section_name
+
+            section_parser_method = getattr(
+                self,
+                # Dots in section names are translated into dunderscores.
+                ('parse_section%s' % method_postfix).replace('.', '__'),
+                None)
+
+            if section_parser_method is None:
+                raise DistutilsOptionError(
+                    'Unsupported distribution option section: [%s.%s]' % (
+                        self.section_prefix, section_name))
+
+            section_parser_method(section_options)
+
+    def _deprecated_config_handler(self, func, msg, warning_class):
+        """ this function will wrap around parameters that are deprecated
+
+        :param msg: deprecation message
+        :param warning_class: class of warning exception to be raised
+        :param func: function to be wrapped around
+        """
+        @wraps(func)
+        def config_handler(*args, **kwargs):
+            warnings.warn(msg, warning_class)
+            return func(*args, **kwargs)
+
+        return config_handler
+
+
+class ConfigMetadataHandler(ConfigHandler):
+
+    section_prefix = 'metadata'
+
+    aliases = {
+        'home_page': 'url',
+        'summary': 'description',
+        'classifier': 'classifiers',
+        'platform': 'platforms',
+    }
+
+    strict_mode = False
+    """We need to keep it loose, to be partially compatible with
+    `pbr` and `d2to1` packages which also uses `metadata` section.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False,
+                 package_dir=None):
+        super(ConfigMetadataHandler, self).__init__(target_obj, options,
+                                                    ignore_option_errors)
+        self.package_dir = package_dir
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_file = self._parse_file
+        parse_dict = self._parse_dict
+        exclude_files_parser = self._exclude_files_parser
+
+        return {
+            'platforms': parse_list,
+            'keywords': parse_list,
+            'provides': parse_list,
+            'requires': self._deprecated_config_handler(
+                parse_list,
+                "The requires parameter is deprecated, please use "
+                "install_requires for runtime dependencies.",
+                DeprecationWarning),
+            'obsoletes': parse_list,
+            'classifiers': self._get_parser_compound(parse_file, parse_list),
+            'license': exclude_files_parser('license'),
+            'description': parse_file,
+            'long_description': parse_file,
+            'version': self._parse_version,
+            'project_urls': parse_dict,
+        }
+
+    def _parse_version(self, value):
+        """Parses `version` option value.
+
+        :param value:
+        :rtype: str
+
+        """
+        version = self._parse_file(value)
+
+        if version != value:
+            version = version.strip()
+            # Be strict about versions loaded from file because it's easy to
+            # accidentally include newlines and other unintended content
+            if isinstance(parse(version), LegacyVersion):
+                tmpl = (
+                    'Version loaded from {value} does not '
+                    'comply with PEP 440: {version}'
+                )
+                raise DistutilsOptionError(tmpl.format(**locals()))
+
+            return version
+
+        version = self._parse_attr(value, self.package_dir)
+
+        if callable(version):
+            version = version()
+
+        if not isinstance(version, string_types):
+            if hasattr(version, '__iter__'):
+                version = '.'.join(map(str, version))
+            else:
+                version = '%s' % version
+
+        return version
+
+
+class ConfigOptionsHandler(ConfigHandler):
+
+    section_prefix = 'options'
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_list_semicolon = partial(self._parse_list, separator=';')
+        parse_bool = self._parse_bool
+        parse_dict = self._parse_dict
+
+        return {
+            'zip_safe': parse_bool,
+            'use_2to3': parse_bool,
+            'include_package_data': parse_bool,
+            'package_dir': parse_dict,
+            'use_2to3_fixers': parse_list,
+            'use_2to3_exclude_fixers': parse_list,
+            'convert_2to3_doctests': parse_list,
+            'scripts': parse_list,
+            'eager_resources': parse_list,
+            'dependency_links': parse_list,
+            'namespace_packages': parse_list,
+            'install_requires': parse_list_semicolon,
+            'setup_requires': parse_list_semicolon,
+            'tests_require': parse_list_semicolon,
+            'packages': self._parse_packages,
+            'entry_points': self._parse_file,
+            'py_modules': parse_list,
+        }
+
+    def _parse_packages(self, value):
+        """Parses `packages` option value.
+
+        :param value:
+        :rtype: list
+        """
+        find_directives = ['find:', 'find_namespace:']
+        trimmed_value = value.strip()
+
+        if trimmed_value not in find_directives:
+            return self._parse_list(value)
+
+        findns = trimmed_value == find_directives[1]
+        if findns and not PY3:
+            raise DistutilsOptionError(
+                'find_namespace: directive is unsupported on Python < 3.3')
+
+        # Read function arguments from a dedicated section.
+        find_kwargs = self.parse_section_packages__find(
+            self.sections.get('packages.find', {}))
+
+        if findns:
+            from setuptools import find_namespace_packages as find_packages
+        else:
+            from setuptools import find_packages
+
+        return find_packages(**find_kwargs)
+
+    def parse_section_packages__find(self, section_options):
+        """Parses `packages.find` configuration file section.
+
+        To be used in conjunction with _parse_packages().
+
+        :param dict section_options:
+        """
+        section_data = self._parse_section_to_dict(
+            section_options, self._parse_list)
+
+        valid_keys = ['where', 'include', 'exclude']
+
+        find_kwargs = dict(
+            [(k, v) for k, v in section_data.items() if k in valid_keys and v])
+
+        where = find_kwargs.get('where')
+        if where is not None:
+            find_kwargs['where'] = where[0]  # cast list to single val
+
+        return find_kwargs
+
+    def parse_section_entry_points(self, section_options):
+        """Parses `entry_points` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['entry_points'] = parsed
+
+    def _parse_package_data(self, section_options):
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+
+        root = parsed.get('*')
+        if root:
+            parsed[''] = root
+            del parsed['*']
+
+        return parsed
+
+    def parse_section_package_data(self, section_options):
+        """Parses `package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['package_data'] = self._parse_package_data(section_options)
+
+    def parse_section_exclude_package_data(self, section_options):
+        """Parses `exclude_package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['exclude_package_data'] = self._parse_package_data(
+            section_options)
+
+    def parse_section_extras_require(self, section_options):
+        """Parses `extras_require` configuration file section.
+
+        :param dict section_options:
+        """
+        parse_list = partial(self._parse_list, separator=';')
+        self['extras_require'] = self._parse_section_to_dict(
+            section_options, parse_list)
+
+    def parse_section_data_files(self, section_options):
+        """Parses `data_files` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['data_files'] = [(k, v) for k, v in parsed.items()]
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dep_util.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dep_util.py
new file mode 100644
index 00000000..2931c13e
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dep_util.py
@@ -0,0 +1,23 @@
+from distutils.dep_util import newer_group
+
+# yes, this is was almost entirely copy-pasted from
+# 'newer_pairwise()', this is just another convenience
+# function.
+def newer_pairwise_group(sources_groups, targets):
+    """Walk both arguments in parallel, testing if each source group is newer
+    than its corresponding target. Returns a pair of lists (sources_groups,
+    targets) where sources is newer than target, according to the semantics
+    of 'newer_group()'.
+    """
+    if len(sources_groups) != len(targets):
+        raise ValueError("'sources_group' and 'targets' must be the same length")
+
+    # build a pair of lists (sources_groups, targets) where source is newer
+    n_sources = []
+    n_targets = []
+    for i in range(len(sources_groups)):
+        if newer_group(sources_groups[i], targets[i]):
+            n_sources.append(sources_groups[i])
+            n_targets.append(targets[i])
+
+    return n_sources, n_targets
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/depends.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/depends.py
new file mode 100644
index 00000000..45e7052d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/depends.py
@@ -0,0 +1,186 @@
+import sys
+import imp
+import marshal
+from distutils.version import StrictVersion
+from imp import PKG_DIRECTORY, PY_COMPILED, PY_SOURCE, PY_FROZEN
+
+from .py33compat import Bytecode
+
+
+__all__ = [
+    'Require', 'find_module', 'get_module_constant', 'extract_constant'
+]
+
+
+class Require:
+    """A prerequisite to building or installing a distribution"""
+
+    def __init__(self, name, requested_version, module, homepage='',
+            attribute=None, format=None):
+
+        if format is None and requested_version is not None:
+            format = StrictVersion
+
+        if format is not None:
+            requested_version = format(requested_version)
+            if attribute is None:
+                attribute = '__version__'
+
+        self.__dict__.update(locals())
+        del self.self
+
+    def full_name(self):
+        """Return full package/distribution name, w/version"""
+        if self.requested_version is not None:
+            return '%s-%s' % (self.name, self.requested_version)
+        return self.name
+
+    def version_ok(self, version):
+        """Is 'version' sufficiently up-to-date?"""
+        return self.attribute is None or self.format is None or \
+            str(version) != "unknown" and version >= self.requested_version
+
+    def get_version(self, paths=None, default="unknown"):
+        """Get version number of installed module, 'None', or 'default'
+
+        Search 'paths' for module.  If not found, return 'None'.  If found,
+        return the extracted version attribute, or 'default' if no version
+        attribute was specified, or the value cannot be determined without
+        importing the module.  The version is formatted according to the
+        requirement's version format (if any), unless it is 'None' or the
+        supplied 'default'.
+        """
+
+        if self.attribute is None:
+            try:
+                f, p, i = find_module(self.module, paths)
+                if f:
+                    f.close()
+                return default
+            except ImportError:
+                return None
+
+        v = get_module_constant(self.module, self.attribute, default, paths)
+
+        if v is not None and v is not default and self.format is not None:
+            return self.format(v)
+
+        return v
+
+    def is_present(self, paths=None):
+        """Return true if dependency is present on 'paths'"""
+        return self.get_version(paths) is not None
+
+    def is_current(self, paths=None):
+        """Return true if dependency is present and up-to-date on 'paths'"""
+        version = self.get_version(paths)
+        if version is None:
+            return False
+        return self.version_ok(version)
+
+
+def find_module(module, paths=None):
+    """Just like 'imp.find_module()', but with package support"""
+
+    parts = module.split('.')
+
+    while parts:
+        part = parts.pop(0)
+        f, path, (suffix, mode, kind) = info = imp.find_module(part, paths)
+
+        if kind == PKG_DIRECTORY:
+            parts = parts or ['__init__']
+            paths = [path]
+
+        elif parts:
+            raise ImportError("Can't find %r in %s" % (parts, module))
+
+    return info
+
+
+def get_module_constant(module, symbol, default=-1, paths=None):
+    """Find 'module' by searching 'paths', and extract 'symbol'
+
+    Return 'None' if 'module' does not exist on 'paths', or it does not define
+    'symbol'.  If the module defines 'symbol' as a constant, return the
+    constant.  Otherwise, return 'default'."""
+
+    try:
+        f, path, (suffix, mode, kind) = find_module(module, paths)
+    except ImportError:
+        # Module doesn't exist
+        return None
+
+    try:
+        if kind == PY_COMPILED:
+            f.read(8)  # skip magic & date
+            code = marshal.load(f)
+        elif kind == PY_FROZEN:
+            code = imp.get_frozen_object(module)
+        elif kind == PY_SOURCE:
+            code = compile(f.read(), path, 'exec')
+        else:
+            # Not something we can parse; we'll have to import it.  :(
+            if module not in sys.modules:
+                imp.load_module(module, f, path, (suffix, mode, kind))
+            return getattr(sys.modules[module], symbol, None)
+
+    finally:
+        if f:
+            f.close()
+
+    return extract_constant(code, symbol, default)
+
+
+def extract_constant(code, symbol, default=-1):
+    """Extract the constant value of 'symbol' from 'code'
+
+    If the name 'symbol' is bound to a constant value by the Python code
+    object 'code', return that value.  If 'symbol' is bound to an expression,
+    return 'default'.  Otherwise, return 'None'.
+
+    Return value is based on the first assignment to 'symbol'.  'symbol' must
+    be a global, or at least a non-"fast" local in the code block.  That is,
+    only 'STORE_NAME' and 'STORE_GLOBAL' opcodes are checked, and 'symbol'
+    must be present in 'code.co_names'.
+    """
+    if symbol not in code.co_names:
+        # name's not there, can't possibly be an assignment
+        return None
+
+    name_idx = list(code.co_names).index(symbol)
+
+    STORE_NAME = 90
+    STORE_GLOBAL = 97
+    LOAD_CONST = 100
+
+    const = default
+
+    for byte_code in Bytecode(code):
+        op = byte_code.opcode
+        arg = byte_code.arg
+
+        if op == LOAD_CONST:
+            const = code.co_consts[arg]
+        elif arg == name_idx and (op == STORE_NAME or op == STORE_GLOBAL):
+            return const
+        else:
+            const = default
+
+
+def _update_globals():
+    """
+    Patch the globals to remove the objects not available on some platforms.
+
+    XXX it'd be better to test assertions about bytecode instead.
+    """
+
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        return
+    incompatible = 'extract_constant', 'get_module_constant'
+    for name in incompatible:
+        del globals()[name]
+        __all__.remove(name)
+
+
+_update_globals()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dist.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dist.py
new file mode 100644
index 00000000..9a165de0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/dist.py
@@ -0,0 +1,1278 @@
+# -*- coding: utf-8 -*-
+__all__ = ['Distribution']
+
+import io
+import sys
+import re
+import os
+import warnings
+import numbers
+import distutils.log
+import distutils.core
+import distutils.cmd
+import distutils.dist
+from distutils.util import strtobool
+from distutils.debug import DEBUG
+from distutils.fancy_getopt import translate_longopt
+import itertools
+
+from collections import defaultdict
+from email import message_from_file
+
+from distutils.errors import (
+    DistutilsOptionError, DistutilsPlatformError, DistutilsSetupError,
+)
+from distutils.util import rfc822_escape
+from distutils.version import StrictVersion
+
+from setuptools.extern import six
+from setuptools.extern import packaging
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+from . import SetuptoolsDeprecationWarning
+
+from setuptools.depends import Require
+from setuptools import windows_support
+from setuptools.monkey import get_unpatched
+from setuptools.config import parse_configuration
+import pkg_resources
+
+__import__('setuptools.extern.packaging.specifiers')
+__import__('setuptools.extern.packaging.version')
+
+
+def _get_unpatched(cls):
+    warnings.warn("Do not call this function", DistDeprecationWarning)
+    return get_unpatched(cls)
+
+
+def get_metadata_version(self):
+    mv = getattr(self, 'metadata_version', None)
+
+    if mv is None:
+        if self.long_description_content_type or self.provides_extras:
+            mv = StrictVersion('2.1')
+        elif (self.maintainer is not None or
+              self.maintainer_email is not None or
+              getattr(self, 'python_requires', None) is not None):
+            mv = StrictVersion('1.2')
+        elif (self.provides or self.requires or self.obsoletes or
+                self.classifiers or self.download_url):
+            mv = StrictVersion('1.1')
+        else:
+            mv = StrictVersion('1.0')
+
+        self.metadata_version = mv
+
+    return mv
+
+
+def read_pkg_file(self, file):
+    """Reads the metadata values from a file object."""
+    msg = message_from_file(file)
+
+    def _read_field(name):
+        value = msg[name]
+        if value == 'UNKNOWN':
+            return None
+        return value
+
+    def _read_list(name):
+        values = msg.get_all(name, None)
+        if values == []:
+            return None
+        return values
+
+    self.metadata_version = StrictVersion(msg['metadata-version'])
+    self.name = _read_field('name')
+    self.version = _read_field('version')
+    self.description = _read_field('summary')
+    # we are filling author only.
+    self.author = _read_field('author')
+    self.maintainer = None
+    self.author_email = _read_field('author-email')
+    self.maintainer_email = None
+    self.url = _read_field('home-page')
+    self.license = _read_field('license')
+
+    if 'download-url' in msg:
+        self.download_url = _read_field('download-url')
+    else:
+        self.download_url = None
+
+    self.long_description = _read_field('description')
+    self.description = _read_field('summary')
+
+    if 'keywords' in msg:
+        self.keywords = _read_field('keywords').split(',')
+
+    self.platforms = _read_list('platform')
+    self.classifiers = _read_list('classifier')
+
+    # PEP 314 - these fields only exist in 1.1
+    if self.metadata_version == StrictVersion('1.1'):
+        self.requires = _read_list('requires')
+        self.provides = _read_list('provides')
+        self.obsoletes = _read_list('obsoletes')
+    else:
+        self.requires = None
+        self.provides = None
+        self.obsoletes = None
+
+
+# Based on Python 3.5 version
+def write_pkg_file(self, file):
+    """Write the PKG-INFO format data to a file object.
+    """
+    version = self.get_metadata_version()
+
+    if six.PY2:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, self._encode_field(value)))
+    else:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, value))
+
+    write_field('Metadata-Version', str(version))
+    write_field('Name', self.get_name())
+    write_field('Version', self.get_version())
+    write_field('Summary', self.get_description())
+    write_field('Home-page', self.get_url())
+
+    if version < StrictVersion('1.2'):
+        write_field('Author', self.get_contact())
+        write_field('Author-email', self.get_contact_email())
+    else:
+        optional_fields = (
+            ('Author', 'author'),
+            ('Author-email', 'author_email'),
+            ('Maintainer', 'maintainer'),
+            ('Maintainer-email', 'maintainer_email'),
+        )
+
+        for field, attr in optional_fields:
+            attr_val = getattr(self, attr)
+
+            if attr_val is not None:
+                write_field(field, attr_val)
+
+    write_field('License', self.get_license())
+    if self.download_url:
+        write_field('Download-URL', self.download_url)
+    for project_url in self.project_urls.items():
+        write_field('Project-URL',  '%s, %s' % project_url)
+
+    long_desc = rfc822_escape(self.get_long_description())
+    write_field('Description', long_desc)
+
+    keywords = ','.join(self.get_keywords())
+    if keywords:
+        write_field('Keywords', keywords)
+
+    if version >= StrictVersion('1.2'):
+        for platform in self.get_platforms():
+            write_field('Platform', platform)
+    else:
+        self._write_list(file, 'Platform', self.get_platforms())
+
+    self._write_list(file, 'Classifier', self.get_classifiers())
+
+    # PEP 314
+    self._write_list(file, 'Requires', self.get_requires())
+    self._write_list(file, 'Provides', self.get_provides())
+    self._write_list(file, 'Obsoletes', self.get_obsoletes())
+
+    # Setuptools specific for PEP 345
+    if hasattr(self, 'python_requires'):
+        write_field('Requires-Python', self.python_requires)
+
+    # PEP 566
+    if self.long_description_content_type:
+        write_field(
+            'Description-Content-Type',
+            self.long_description_content_type
+        )
+    if self.provides_extras:
+        for extra in self.provides_extras:
+            write_field('Provides-Extra', extra)
+
+
+sequence = tuple, list
+
+
+def check_importable(dist, attr, value):
+    try:
+        ep = pkg_resources.EntryPoint.parse('x=' + value)
+        assert not ep.extras
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be importable 'module:attrs' string (got %r)"
+            % (attr, value)
+        )
+
+
+def assert_string_list(dist, attr, value):
+    """Verify that value is a string list or None"""
+    try:
+        assert ''.join(value) != value
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be a list of strings (got %r)" % (attr, value)
+        )
+
+
+def check_nsp(dist, attr, value):
+    """Verify that namespace packages are valid"""
+    ns_packages = value
+    assert_string_list(dist, attr, ns_packages)
+    for nsp in ns_packages:
+        if not dist.has_contents_for(nsp):
+            raise DistutilsSetupError(
+                "Distribution contains no modules or packages for " +
+                "namespace package %r" % nsp
+            )
+        parent, sep, child = nsp.rpartition('.')
+        if parent and parent not in ns_packages:
+            distutils.log.warn(
+                "WARNING: %r is declared as a package namespace, but %r"
+                " is not: please correct this in setup.py", nsp, parent
+            )
+
+
+def check_extras(dist, attr, value):
+    """Verify that extras_require mapping is valid"""
+    try:
+        list(itertools.starmap(_check_extra, value.items()))
+    except (TypeError, ValueError, AttributeError):
+        raise DistutilsSetupError(
+            "'extras_require' must be a dictionary whose values are "
+            "strings or lists of strings containing valid project/version "
+            "requirement specifiers."
+        )
+
+
+def _check_extra(extra, reqs):
+    name, sep, marker = extra.partition(':')
+    if marker and pkg_resources.invalid_marker(marker):
+        raise DistutilsSetupError("Invalid environment marker: " + marker)
+    list(pkg_resources.parse_requirements(reqs))
+
+
+def assert_bool(dist, attr, value):
+    """Verify that value is True, False, 0, or 1"""
+    if bool(value) != value:
+        tmpl = "{attr!r} must be a boolean value (got {value!r})"
+        raise DistutilsSetupError(tmpl.format(attr=attr, value=value))
+
+
+def check_requirements(dist, attr, value):
+    """Verify that install_requires is a valid requirements list"""
+    try:
+        list(pkg_resources.parse_requirements(value))
+        if isinstance(value, (dict, set)):
+            raise TypeError("Unordered types are not allowed")
+    except (TypeError, ValueError) as error:
+        tmpl = (
+            "{attr!r} must be a string or list of strings "
+            "containing valid project/version requirement specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_specifier(dist, attr, value):
+    """Verify that value is a valid version specifier"""
+    try:
+        packaging.specifiers.SpecifierSet(value)
+    except packaging.specifiers.InvalidSpecifier as error:
+        tmpl = (
+            "{attr!r} must be a string "
+            "containing valid version specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_entry_points(dist, attr, value):
+    """Verify that entry_points map is parseable"""
+    try:
+        pkg_resources.EntryPoint.parse_map(value)
+    except ValueError as e:
+        raise DistutilsSetupError(e)
+
+
+def check_test_suite(dist, attr, value):
+    if not isinstance(value, six.string_types):
+        raise DistutilsSetupError("test_suite must be a string")
+
+
+def check_package_data(dist, attr, value):
+    """Verify that value is a dictionary of package names to glob lists"""
+    if isinstance(value, dict):
+        for k, v in value.items():
+            if not isinstance(k, str):
+                break
+            try:
+                iter(v)
+            except TypeError:
+                break
+        else:
+            return
+    raise DistutilsSetupError(
+        attr + " must be a dictionary mapping package names to lists of "
+        "wildcard patterns"
+    )
+
+
+def check_packages(dist, attr, value):
+    for pkgname in value:
+        if not re.match(r'\w+(\.\w+)*', pkgname):
+            distutils.log.warn(
+                "WARNING: %r not a valid package name; please use only "
+                ".-separated package names in setup.py", pkgname
+            )
+
+
+_Distribution = get_unpatched(distutils.core.Distribution)
+
+
+class Distribution(_Distribution):
+    """Distribution with support for features, tests, and package data
+
+    This is an enhanced version of 'distutils.dist.Distribution' that
+    effectively adds the following new optional keyword arguments to 'setup()':
+
+     'install_requires' -- a string or sequence of strings specifying project
+        versions that the distribution requires when installed, in the format
+        used by 'pkg_resources.require()'.  They will be installed
+        automatically when the package is installed.  If you wish to use
+        packages that are not available in PyPI, or want to give your users an
+        alternate download location, you can add a 'find_links' option to the
+        '[easy_install]' section of your project's 'setup.cfg' file, and then
+        setuptools will scan the listed web pages for links that satisfy the
+        requirements.
+
+     'extras_require' -- a dictionary mapping names of optional "extras" to the
+        additional requirement(s) that using those extras incurs. For example,
+        this::
+
+            extras_require = dict(reST = ["docutils>=0.3", "reSTedit"])
+
+        indicates that the distribution can optionally provide an extra
+        capability called "reST", but it can only be used if docutils and
+        reSTedit are installed.  If the user installs your package using
+        EasyInstall and requests one of your extras, the corresponding
+        additional requirements will be installed if needed.
+
+     'features' **deprecated** -- a dictionary mapping option names to
+        'setuptools.Feature'
+        objects.  Features are a portion of the distribution that can be
+        included or excluded based on user options, inter-feature dependencies,
+        and availability on the current system.  Excluded features are omitted
+        from all setup commands, including source and binary distributions, so
+        you can create multiple distributions from the same source tree.
+        Feature names should be valid Python identifiers, except that they may
+        contain the '-' (minus) sign.  Features can be included or excluded
+        via the command line options '--with-X' and '--without-X', where 'X' is
+        the name of the feature.  Whether a feature is included by default, and
+        whether you are allowed to control this from the command line, is
+        determined by the Feature object.  See the 'Feature' class for more
+        information.
+
+     'test_suite' -- the name of a test suite to run for the 'test' command.
+        If the user runs 'python setup.py test', the package will be installed,
+        and the named test suite will be run.  The format is the same as
+        would be used on a 'unittest.py' command line.  That is, it is the
+        dotted name of an object to import and call to generate a test suite.
+
+     'package_data' -- a dictionary mapping package names to lists of filenames
+        or globs to use to find data files contained in the named packages.
+        If the dictionary has filenames or globs listed under '""' (the empty
+        string), those names will be searched for in every package, in addition
+        to any names for the specific package.  Data files found using these
+        names/globs will be installed along with the package, in the same
+        location as the package.  Note that globs are allowed to reference
+        the contents of non-package subdirectories, as long as you use '/' as
+        a path separator.  (Globs are automatically converted to
+        platform-specific paths at runtime.)
+
+    In addition to these new keywords, this class also has several new methods
+    for manipulating the distribution's contents.  For example, the 'include()'
+    and 'exclude()' methods can be thought of as in-place add and subtract
+    commands that add or remove packages, modules, extensions, and so on from
+    the distribution.  They are used by the feature subsystem to configure the
+    distribution for the included and excluded features.
+    """
+
+    _DISTUTILS_UNSUPPORTED_METADATA = {
+        'long_description_content_type': None,
+        'project_urls': dict,
+        'provides_extras': set,
+    }
+
+    _patched_dist = None
+
+    def patch_missing_pkg_info(self, attrs):
+        # Fake up a replacement for the data that would normally come from
+        # PKG-INFO, but which might not yet be built if this is a fresh
+        # checkout.
+        #
+        if not attrs or 'name' not in attrs or 'version' not in attrs:
+            return
+        key = pkg_resources.safe_name(str(attrs['name'])).lower()
+        dist = pkg_resources.working_set.by_key.get(key)
+        if dist is not None and not dist.has_metadata('PKG-INFO'):
+            dist._version = pkg_resources.safe_version(str(attrs['version']))
+            self._patched_dist = dist
+
+    def __init__(self, attrs=None):
+        have_package_data = hasattr(self, "package_data")
+        if not have_package_data:
+            self.package_data = {}
+        attrs = attrs or {}
+        if 'features' in attrs or 'require_features' in attrs:
+            Feature.warn_deprecated()
+        self.require_features = []
+        self.features = {}
+        self.dist_files = []
+        # Filter-out setuptools' specific options.
+        self.src_root = attrs.pop("src_root", None)
+        self.patch_missing_pkg_info(attrs)
+        self.dependency_links = attrs.pop('dependency_links', [])
+        self.setup_requires = attrs.pop('setup_requires', [])
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            vars(self).setdefault(ep.name, None)
+        _Distribution.__init__(self, {
+            k: v for k, v in attrs.items()
+            if k not in self._DISTUTILS_UNSUPPORTED_METADATA
+        })
+
+        # Fill-in missing metadata fields not supported by distutils.
+        # Note some fields may have been set by other tools (e.g. pbr)
+        # above; they are taken preferrentially to setup() arguments
+        for option, default in self._DISTUTILS_UNSUPPORTED_METADATA.items():
+            for source in self.metadata.__dict__, attrs:
+                if option in source:
+                    value = source[option]
+                    break
+            else:
+                value = default() if default else None
+            setattr(self.metadata, option, value)
+
+        if isinstance(self.metadata.version, numbers.Number):
+            # Some people apparently take "version number" too literally :)
+            self.metadata.version = str(self.metadata.version)
+
+        if self.metadata.version is not None:
+            try:
+                ver = packaging.version.Version(self.metadata.version)
+                normalized_version = str(ver)
+                if self.metadata.version != normalized_version:
+                    warnings.warn(
+                        "Normalizing '%s' to '%s'" % (
+                            self.metadata.version,
+                            normalized_version,
+                        )
+                    )
+                    self.metadata.version = normalized_version
+            except (packaging.version.InvalidVersion, TypeError):
+                warnings.warn(
+                    "The version specified (%r) is an invalid version, this "
+                    "may not work as expected with newer versions of "
+                    "setuptools, pip, and PyPI. Please see PEP 440 for more "
+                    "details." % self.metadata.version
+                )
+        self._finalize_requires()
+
+    def _finalize_requires(self):
+        """
+        Set `metadata.python_requires` and fix environment markers
+        in `install_requires` and `extras_require`.
+        """
+        if getattr(self, 'python_requires', None):
+            self.metadata.python_requires = self.python_requires
+
+        if getattr(self, 'extras_require', None):
+            for extra in self.extras_require.keys():
+                # Since this gets called multiple times at points where the
+                # keys have become 'converted' extras, ensure that we are only
+                # truly adding extras we haven't seen before here.
+                extra = extra.split(':')[0]
+                if extra:
+                    self.metadata.provides_extras.add(extra)
+
+        self._convert_extras_requirements()
+        self._move_install_requirements_markers()
+
+    def _convert_extras_requirements(self):
+        """
+        Convert requirements in `extras_require` of the form
+        `"extra": ["barbazquux; {marker}"]` to
+        `"extra:{marker}": ["barbazquux"]`.
+        """
+        spec_ext_reqs = getattr(self, 'extras_require', None) or {}
+        self._tmp_extras_require = defaultdict(list)
+        for section, v in spec_ext_reqs.items():
+            # Do not strip empty sections.
+            self._tmp_extras_require[section]
+            for r in pkg_resources.parse_requirements(v):
+                suffix = self._suffix_for(r)
+                self._tmp_extras_require[section + suffix].append(r)
+
+    @staticmethod
+    def _suffix_for(req):
+        """
+        For a requirement, return the 'extras_require' suffix for
+        that requirement.
+        """
+        return ':' + str(req.marker) if req.marker else ''
+
+    def _move_install_requirements_markers(self):
+        """
+        Move requirements in `install_requires` that are using environment
+        markers `extras_require`.
+        """
+
+        # divide the install_requires into two sets, simple ones still
+        # handled by install_requires and more complex ones handled
+        # by extras_require.
+
+        def is_simple_req(req):
+            return not req.marker
+
+        spec_inst_reqs = getattr(self, 'install_requires', None) or ()
+        inst_reqs = list(pkg_resources.parse_requirements(spec_inst_reqs))
+        simple_reqs = filter(is_simple_req, inst_reqs)
+        complex_reqs = filterfalse(is_simple_req, inst_reqs)
+        self.install_requires = list(map(str, simple_reqs))
+
+        for r in complex_reqs:
+            self._tmp_extras_require[':' + str(r.marker)].append(r)
+        self.extras_require = dict(
+            (k, [str(r) for r in map(self._clean_req, v)])
+            for k, v in self._tmp_extras_require.items()
+        )
+
+    def _clean_req(self, req):
+        """
+        Given a Requirement, remove environment markers and return it.
+        """
+        req.marker = None
+        return req
+
+    def _parse_config_files(self, filenames=None):
+        """
+        Adapted from distutils.dist.Distribution.parse_config_files,
+        this method provides the same functionality in subtly-improved
+        ways.
+        """
+        from setuptools.extern.six.moves.configparser import ConfigParser
+
+        # Ignore install directory options if we have a venv
+        if six.PY3 and sys.prefix != sys.base_prefix:
+            ignore_options = [
+                'install-base', 'install-platbase', 'install-lib',
+                'install-platlib', 'install-purelib', 'install-headers',
+                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
+                'home', 'user', 'root']
+        else:
+            ignore_options = []
+
+        ignore_options = frozenset(ignore_options)
+
+        if filenames is None:
+            filenames = self.find_config_files()
+
+        if DEBUG:
+            self.announce("Distribution.parse_config_files():")
+
+        parser = ConfigParser()
+        for filename in filenames:
+            with io.open(filename, encoding='utf-8') as reader:
+                if DEBUG:
+                    self.announce("  reading {filename}".format(**locals()))
+                (parser.read_file if six.PY3 else parser.readfp)(reader)
+            for section in parser.sections():
+                options = parser.options(section)
+                opt_dict = self.get_option_dict(section)
+
+                for opt in options:
+                    if opt != '__name__' and opt not in ignore_options:
+                        val = self._try_str(parser.get(section, opt))
+                        opt = opt.replace('-', '_')
+                        opt_dict[opt] = (filename, val)
+
+            # Make the ConfigParser forget everything (so we retain
+            # the original filenames that options come from)
+            parser.__init__()
+
+        # If there was a "global" section in the config file, use it
+        # to set Distribution options.
+
+        if 'global' in self.command_options:
+            for (opt, (src, val)) in self.command_options['global'].items():
+                alias = self.negative_opt.get(opt)
+                try:
+                    if alias:
+                        setattr(self, alias, not strtobool(val))
+                    elif opt in ('verbose', 'dry_run'):  # ugh!
+                        setattr(self, opt, strtobool(val))
+                    else:
+                        setattr(self, opt, val)
+                except ValueError as msg:
+                    raise DistutilsOptionError(msg)
+
+    @staticmethod
+    def _try_str(val):
+        """
+        On Python 2, much of distutils relies on string values being of
+        type 'str' (bytes) and not unicode text. If the value can be safely
+        encoded to bytes using the default encoding, prefer that.
+
+        Why the default encoding? Because that value can be implicitly
+        decoded back to text if needed.
+
+        Ref #1653
+        """
+        if six.PY3:
+            return val
+        try:
+            return val.encode()
+        except UnicodeEncodeError:
+            pass
+        return val
+
+    def _set_command_options(self, command_obj, option_dict=None):
+        """
+        Set the options for 'command_obj' from 'option_dict'.  Basically
+        this means copying elements of a dictionary ('option_dict') to
+        attributes of an instance ('command').
+
+        'command_obj' must be a Command instance.  If 'option_dict' is not
+        supplied, uses the standard option dictionary for this command
+        (from 'self.command_options').
+
+        (Adopted from distutils.dist.Distribution._set_command_options)
+        """
+        command_name = command_obj.get_command_name()
+        if option_dict is None:
+            option_dict = self.get_option_dict(command_name)
+
+        if DEBUG:
+            self.announce("  setting options for '%s' command:" % command_name)
+        for (option, (source, value)) in option_dict.items():
+            if DEBUG:
+                self.announce("    %s = %s (from %s)" % (option, value,
+                                                         source))
+            try:
+                bool_opts = [translate_longopt(o)
+                             for o in command_obj.boolean_options]
+            except AttributeError:
+                bool_opts = []
+            try:
+                neg_opt = command_obj.negative_opt
+            except AttributeError:
+                neg_opt = {}
+
+            try:
+                is_string = isinstance(value, six.string_types)
+                if option in neg_opt and is_string:
+                    setattr(command_obj, neg_opt[option], not strtobool(value))
+                elif option in bool_opts and is_string:
+                    setattr(command_obj, option, strtobool(value))
+                elif hasattr(command_obj, option):
+                    setattr(command_obj, option, value)
+                else:
+                    raise DistutilsOptionError(
+                        "error in %s: command '%s' has no such option '%s'"
+                        % (source, command_name, option))
+            except ValueError as msg:
+                raise DistutilsOptionError(msg)
+
+    def parse_config_files(self, filenames=None, ignore_option_errors=False):
+        """Parses configuration files from various levels
+        and loads configuration.
+
+        """
+        self._parse_config_files(filenames=filenames)
+
+        parse_configuration(self, self.command_options,
+                            ignore_option_errors=ignore_option_errors)
+        self._finalize_requires()
+
+    def parse_command_line(self):
+        """Process features after parsing command line options"""
+        result = _Distribution.parse_command_line(self)
+        if self.features:
+            self._finalize_features()
+        return result
+
+    def _feature_attrname(self, name):
+        """Convert feature name to corresponding option attribute name"""
+        return 'with_' + name.replace('-', '_')
+
+    def fetch_build_eggs(self, requires):
+        """Resolve pre-setup requirements"""
+        resolved_dists = pkg_resources.working_set.resolve(
+            pkg_resources.parse_requirements(requires),
+            installer=self.fetch_build_egg,
+            replace_conflicting=True,
+        )
+        for dist in resolved_dists:
+            pkg_resources.working_set.add(dist, replace=True)
+        return resolved_dists
+
+    def finalize_options(self):
+        _Distribution.finalize_options(self)
+        if self.features:
+            self._set_global_opts_from_features()
+
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            value = getattr(self, ep.name, None)
+            if value is not None:
+                ep.require(installer=self.fetch_build_egg)
+                ep.load()(self, ep.name, value)
+        if getattr(self, 'convert_2to3_doctests', None):
+            # XXX may convert to set here when we can rely on set being builtin
+            self.convert_2to3_doctests = [
+                os.path.abspath(p)
+                for p in self.convert_2to3_doctests
+            ]
+        else:
+            self.convert_2to3_doctests = []
+
+    def get_egg_cache_dir(self):
+        egg_cache_dir = os.path.join(os.curdir, '.eggs')
+        if not os.path.exists(egg_cache_dir):
+            os.mkdir(egg_cache_dir)
+            windows_support.hide_file(egg_cache_dir)
+            readme_txt_filename = os.path.join(egg_cache_dir, 'README.txt')
+            with open(readme_txt_filename, 'w') as f:
+                f.write('This directory contains eggs that were downloaded '
+                        'by setuptools to build, test, and run plug-ins.\n\n')
+                f.write('This directory caches those eggs to prevent '
+                        'repeated downloads.\n\n')
+                f.write('However, it is safe to delete this directory.\n\n')
+
+        return egg_cache_dir
+
+    def fetch_build_egg(self, req):
+        """Fetch an egg needed for building"""
+        from setuptools.command.easy_install import easy_install
+        dist = self.__class__({'script_args': ['easy_install']})
+        opts = dist.get_option_dict('easy_install')
+        opts.clear()
+        opts.update(
+            (k, v)
+            for k, v in self.get_option_dict('easy_install').items()
+            if k in (
+                # don't use any other settings
+                'find_links', 'site_dirs', 'index_url',
+                'optimize', 'site_dirs', 'allow_hosts',
+            ))
+        if self.dependency_links:
+            links = self.dependency_links[:]
+            if 'find_links' in opts:
+                links = opts['find_links'][1] + links
+            opts['find_links'] = ('setup', links)
+        install_dir = self.get_egg_cache_dir()
+        cmd = easy_install(
+            dist, args=["x"], install_dir=install_dir,
+            exclude_scripts=True,
+            always_copy=False, build_directory=None, editable=False,
+            upgrade=False, multi_version=True, no_report=True, user=False
+        )
+        cmd.ensure_finalized()
+        return cmd.easy_install(req)
+
+    def _set_global_opts_from_features(self):
+        """Add --with-X/--without-X options based on optional features"""
+
+        go = []
+        no = self.negative_opt.copy()
+
+        for name, feature in self.features.items():
+            self._set_feature(name, None)
+            feature.validate(self)
+
+            if feature.optional:
+                descr = feature.description
+                incdef = ' (default)'
+                excdef = ''
+                if not feature.include_by_default():
+                    excdef, incdef = incdef, excdef
+
+                new = (
+                    ('with-' + name, None, 'include ' + descr + incdef),
+                    ('without-' + name, None, 'exclude ' + descr + excdef),
+                )
+                go.extend(new)
+                no['without-' + name] = 'with-' + name
+
+        self.global_options = self.feature_options = go + self.global_options
+        self.negative_opt = self.feature_negopt = no
+
+    def _finalize_features(self):
+        """Add/remove features and resolve dependencies between them"""
+
+        # First, flag all the enabled items (and thus their dependencies)
+        for name, feature in self.features.items():
+            enabled = self.feature_is_included(name)
+            if enabled or (enabled is None and feature.include_by_default()):
+                feature.include_in(self)
+                self._set_feature(name, 1)
+
+        # Then disable the rest, so that off-by-default features don't
+        # get flagged as errors when they're required by an enabled feature
+        for name, feature in self.features.items():
+            if not self.feature_is_included(name):
+                feature.exclude_from(self)
+                self._set_feature(name, 0)
+
+    def get_command_class(self, command):
+        """Pluggable version of get_command_class()"""
+        if command in self.cmdclass:
+            return self.cmdclass[command]
+
+        eps = pkg_resources.iter_entry_points('distutils.commands', command)
+        for ep in eps:
+            ep.require(installer=self.fetch_build_egg)
+            self.cmdclass[command] = cmdclass = ep.load()
+            return cmdclass
+        else:
+            return _Distribution.get_command_class(self, command)
+
+    def print_commands(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.print_commands(self)
+
+    def get_command_list(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.get_command_list(self)
+
+    def _set_feature(self, name, status):
+        """Set feature's inclusion status"""
+        setattr(self, self._feature_attrname(name), status)
+
+    def feature_is_included(self, name):
+        """Return 1 if feature is included, 0 if excluded, 'None' if unknown"""
+        return getattr(self, self._feature_attrname(name))
+
+    def include_feature(self, name):
+        """Request inclusion of feature named 'name'"""
+
+        if self.feature_is_included(name) == 0:
+            descr = self.features[name].description
+            raise DistutilsOptionError(
+                descr + " is required, but was excluded or is not available"
+            )
+        self.features[name].include_in(self)
+        self._set_feature(name, 1)
+
+    def include(self, **attrs):
+        """Add items to distribution that are named in keyword arguments
+
+        For example, 'dist.include(py_modules=["x"])' would add 'x' to
+        the distribution's 'py_modules' attribute, if it was not already
+        there.
+
+        Currently, this method only supports inclusion for attributes that are
+        lists or tuples.  If you need to add support for adding to other
+        attributes in this or a subclass, you can add an '_include_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'include()'.  So, 'dist.include(foo={"bar":"baz"})'
+        will try to call 'dist._include_foo({"bar":"baz"})', which can then
+        handle whatever special inclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            include = getattr(self, '_include_' + k, None)
+            if include:
+                include(v)
+            else:
+                self._include_misc(k, v)
+
+    def exclude_package(self, package):
+        """Remove packages, modules, and extensions in named package"""
+
+        pfx = package + '.'
+        if self.packages:
+            self.packages = [
+                p for p in self.packages
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.py_modules:
+            self.py_modules = [
+                p for p in self.py_modules
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.ext_modules:
+            self.ext_modules = [
+                p for p in self.ext_modules
+                if p.name != package and not p.name.startswith(pfx)
+            ]
+
+    def has_contents_for(self, package):
+        """Return true if 'exclude_package(package)' would do something"""
+
+        pfx = package + '.'
+
+        for p in self.iter_distribution_names():
+            if p == package or p.startswith(pfx):
+                return True
+
+    def _exclude_misc(self, name, value):
+        """Handle 'exclude()' for list/tuple attrs without a special handler"""
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list or tuple (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is not None and not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        elif old:
+            setattr(self, name, [item for item in old if item not in value])
+
+    def _include_misc(self, name, value):
+        """Handle 'include()' for list/tuple attrs without a special handler"""
+
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is None:
+            setattr(self, name, value)
+        elif not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        else:
+            new = [item for item in value if item not in old]
+            setattr(self, name, old + new)
+
+    def exclude(self, **attrs):
+        """Remove items from distribution that are named in keyword arguments
+
+        For example, 'dist.exclude(py_modules=["x"])' would remove 'x' from
+        the distribution's 'py_modules' attribute.  Excluding packages uses
+        the 'exclude_package()' method, so all of the package's contained
+        packages, modules, and extensions are also excluded.
+
+        Currently, this method only supports exclusion from attributes that are
+        lists or tuples.  If you need to add support for excluding from other
+        attributes in this or a subclass, you can add an '_exclude_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'exclude()'.  So, 'dist.exclude(foo={"bar":"baz"})'
+        will try to call 'dist._exclude_foo({"bar":"baz"})', which can then
+        handle whatever special exclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            exclude = getattr(self, '_exclude_' + k, None)
+            if exclude:
+                exclude(v)
+            else:
+                self._exclude_misc(k, v)
+
+    def _exclude_packages(self, packages):
+        if not isinstance(packages, sequence):
+            raise DistutilsSetupError(
+                "packages: setting must be a list or tuple (%r)" % (packages,)
+            )
+        list(map(self.exclude_package, packages))
+
+    def _parse_command_opts(self, parser, args):
+        # Remove --with-X/--without-X options when processing command args
+        self.global_options = self.__class__.global_options
+        self.negative_opt = self.__class__.negative_opt
+
+        # First, expand any aliases
+        command = args[0]
+        aliases = self.get_option_dict('aliases')
+        while command in aliases:
+            src, alias = aliases[command]
+            del aliases[command]  # ensure each alias can expand only once!
+            import shlex
+            args[:1] = shlex.split(alias, True)
+            command = args[0]
+
+        nargs = _Distribution._parse_command_opts(self, parser, args)
+
+        # Handle commands that want to consume all remaining arguments
+        cmd_class = self.get_command_class(command)
+        if getattr(cmd_class, 'command_consumes_arguments', None):
+            self.get_option_dict(command)['args'] = ("command line", nargs)
+            if nargs is not None:
+                return []
+
+        return nargs
+
+    def get_cmdline_options(self):
+        """Return a '{cmd: {opt:val}}' map of all command-line options
+
+        Option names are all long, but do not include the leading '--', and
+        contain dashes rather than underscores.  If the option doesn't take
+        an argument (e.g. '--quiet'), the 'val' is 'None'.
+
+        Note that options provided by config files are intentionally excluded.
+        """
+
+        d = {}
+
+        for cmd, opts in self.command_options.items():
+
+            for opt, (src, val) in opts.items():
+
+                if src != "command line":
+                    continue
+
+                opt = opt.replace('_', '-')
+
+                if val == 0:
+                    cmdobj = self.get_command_obj(cmd)
+                    neg_opt = self.negative_opt.copy()
+                    neg_opt.update(getattr(cmdobj, 'negative_opt', {}))
+                    for neg, pos in neg_opt.items():
+                        if pos == opt:
+                            opt = neg
+                            val = None
+                            break
+                    else:
+                        raise AssertionError("Shouldn't be able to get here")
+
+                elif val == 1:
+                    val = None
+
+                d.setdefault(cmd, {})[opt] = val
+
+        return d
+
+    def iter_distribution_names(self):
+        """Yield all packages, modules, and extension names in distribution"""
+
+        for pkg in self.packages or ():
+            yield pkg
+
+        for module in self.py_modules or ():
+            yield module
+
+        for ext in self.ext_modules or ():
+            if isinstance(ext, tuple):
+                name, buildinfo = ext
+            else:
+                name = ext.name
+            if name.endswith('module'):
+                name = name[:-6]
+            yield name
+
+    def handle_display_options(self, option_order):
+        """If there were any non-global "display-only" options
+        (--help-commands or the metadata display options) on the command
+        line, display the requested info and return true; else return
+        false.
+        """
+        import sys
+
+        if six.PY2 or self.help_commands:
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Stdout may be StringIO (e.g. in tests)
+        if not isinstance(sys.stdout, io.TextIOWrapper):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Don't wrap stdout if utf-8 is already the encoding. Provides
+        #  workaround for #334.
+        if sys.stdout.encoding.lower() in ('utf-8', 'utf8'):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Print metadata in UTF-8 no matter the platform
+        encoding = sys.stdout.encoding
+        errors = sys.stdout.errors
+        newline = sys.platform != 'win32' and '\n' or None
+        line_buffering = sys.stdout.line_buffering
+
+        sys.stdout = io.TextIOWrapper(
+            sys.stdout.detach(), 'utf-8', errors, newline, line_buffering)
+        try:
+            return _Distribution.handle_display_options(self, option_order)
+        finally:
+            sys.stdout = io.TextIOWrapper(
+                sys.stdout.detach(), encoding, errors, newline, line_buffering)
+
+
+class Feature:
+    """
+    **deprecated** -- The `Feature` facility was never completely implemented
+    or supported, `has reported issues
+    <https://github.com/pypa/setuptools/issues/58>`_ and will be removed in
+    a future version.
+
+    A subset of the distribution that can be excluded if unneeded/wanted
+
+    Features are created using these keyword arguments:
+
+      'description' -- a short, human readable description of the feature, to
+         be used in error messages, and option help messages.
+
+      'standard' -- if true, the feature is included by default if it is
+         available on the current system.  Otherwise, the feature is only
+         included if requested via a command line '--with-X' option, or if
+         another included feature requires it.  The default setting is 'False'.
+
+      'available' -- if true, the feature is available for installation on the
+         current system.  The default setting is 'True'.
+
+      'optional' -- if true, the feature's inclusion can be controlled from the
+         command line, using the '--with-X' or '--without-X' options.  If
+         false, the feature's inclusion status is determined automatically,
+         based on 'availabile', 'standard', and whether any other feature
+         requires it.  The default setting is 'True'.
+
+      'require_features' -- a string or sequence of strings naming features
+         that should also be included if this feature is included.  Defaults to
+         empty list.  May also contain 'Require' objects that should be
+         added/removed from the distribution.
+
+      'remove' -- a string or list of strings naming packages to be removed
+         from the distribution if this feature is *not* included.  If the
+         feature *is* included, this argument is ignored.  This argument exists
+         to support removing features that "crosscut" a distribution, such as
+         defining a 'tests' feature that removes all the 'tests' subpackages
+         provided by other features.  The default for this argument is an empty
+         list.  (Note: the named package(s) or modules must exist in the base
+         distribution when the 'setup()' function is initially called.)
+
+      other keywords -- any other keyword arguments are saved, and passed to
+         the distribution's 'include()' and 'exclude()' methods when the
+         feature is included or excluded, respectively.  So, for example, you
+         could pass 'packages=["a","b"]' to cause packages 'a' and 'b' to be
+         added or removed from the distribution as appropriate.
+
+    A feature must include at least one 'requires', 'remove', or other
+    keyword argument.  Otherwise, it can't affect the distribution in any way.
+    Note also that you can subclass 'Feature' to create your own specialized
+    feature types that modify the distribution in other ways when included or
+    excluded.  See the docstrings for the various methods here for more detail.
+    Aside from the methods, the only feature attributes that distributions look
+    at are 'description' and 'optional'.
+    """
+
+    @staticmethod
+    def warn_deprecated():
+        msg = (
+            "Features are deprecated and will be removed in a future "
+            "version. See https://github.com/pypa/setuptools/issues/65."
+        )
+        warnings.warn(msg, DistDeprecationWarning, stacklevel=3)
+
+    def __init__(
+            self, description, standard=False, available=True,
+            optional=True, require_features=(), remove=(), **extras):
+        self.warn_deprecated()
+
+        self.description = description
+        self.standard = standard
+        self.available = available
+        self.optional = optional
+        if isinstance(require_features, (str, Require)):
+            require_features = require_features,
+
+        self.require_features = [
+            r for r in require_features if isinstance(r, str)
+        ]
+        er = [r for r in require_features if not isinstance(r, str)]
+        if er:
+            extras['require_features'] = er
+
+        if isinstance(remove, str):
+            remove = remove,
+        self.remove = remove
+        self.extras = extras
+
+        if not remove and not require_features and not extras:
+            raise DistutilsSetupError(
+                "Feature %s: must define 'require_features', 'remove', or "
+                "at least one of 'packages', 'py_modules', etc."
+            )
+
+    def include_by_default(self):
+        """Should this feature be included by default?"""
+        return self.available and self.standard
+
+    def include_in(self, dist):
+        """Ensure feature and its requirements are included in distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  Note that this method may be called more than once
+        per feature, and so should be idempotent.
+
+        """
+
+        if not self.available:
+            raise DistutilsPlatformError(
+                self.description + " is required, "
+                "but is not available on this platform"
+            )
+
+        dist.include(**self.extras)
+
+        for f in self.require_features:
+            dist.include_feature(f)
+
+    def exclude_from(self, dist):
+        """Ensure feature is excluded from distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  This method will be called at most once per
+        feature, and only after all included features have been asked to
+        include themselves.
+        """
+
+        dist.exclude(**self.extras)
+
+        if self.remove:
+            for item in self.remove:
+                dist.exclude_package(item)
+
+    def validate(self, dist):
+        """Verify that feature makes sense in context of distribution
+
+        This method is called by the distribution just before it parses its
+        command line.  It checks to ensure that the 'remove' attribute, if any,
+        contains only valid package/module names that are present in the base
+        distribution when 'setup()' is called.  You may override it in a
+        subclass to perform any other required validation of the feature
+        against a target distribution.
+        """
+
+        for item in self.remove:
+            if not dist.has_contents_for(item):
+                raise DistutilsSetupError(
+                    "%s wants to be able to remove %s, but the distribution"
+                    " doesn't contain any packages or modules under %s"
+                    % (self.description, item, item)
+                )
+
+
+class DistDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in dist in
+    setuptools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extension.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extension.py
new file mode 100644
index 00000000..29468894
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extension.py
@@ -0,0 +1,57 @@
+import re
+import functools
+import distutils.core
+import distutils.errors
+import distutils.extension
+
+from setuptools.extern.six.moves import map
+
+from .monkey import get_unpatched
+
+
+def _have_cython():
+    """
+    Return True if Cython can be imported.
+    """
+    cython_impl = 'Cython.Distutils.build_ext'
+    try:
+        # from (cython_impl) import build_ext
+        __import__(cython_impl, fromlist=['build_ext']).build_ext
+        return True
+    except Exception:
+        pass
+    return False
+
+
+# for compatibility
+have_pyrex = _have_cython
+
+_Extension = get_unpatched(distutils.core.Extension)
+
+
+class Extension(_Extension):
+    """Extension that uses '.c' files in place of '.pyx' files"""
+
+    def __init__(self, name, sources, *args, **kw):
+        # The *args is needed for compatibility as calls may use positional
+        # arguments. py_limited_api may be set only via keyword.
+        self.py_limited_api = kw.pop("py_limited_api", False)
+        _Extension.__init__(self, name, sources, *args, **kw)
+
+    def _convert_pyx_sources_to_lang(self):
+        """
+        Replace sources with .pyx extensions to sources with the target
+        language extension. This mechanism allows language authors to supply
+        pre-converted sources but to prefer the .pyx sources.
+        """
+        if _have_cython():
+            # the build has Cython, so allow it to compile the .pyx files
+            return
+        lang = self.language or ''
+        target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
+        sub = functools.partial(re.sub, '.pyx$', target_ext)
+        self.sources = list(map(sub, self.sources))
+
+
+class Library(Extension):
+    """Just like a regular Extension, but built as a library instead"""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__init__.py
new file mode 100644
index 00000000..cb2fa329
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if sys.version_info >= (3, ):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'six', 'packaging', 'pyparsing',
+VendorImporter(__name__, names, 'setuptools._vendor').install()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..da3045d5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/extern/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glibc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glibc.py
new file mode 100644
index 00000000..a134591c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glibc.py
@@ -0,0 +1,86 @@
+# This file originally from pip:
+# https://github.com/pypa/pip/blob/8f4f15a5a95d7d5b511ceaee9ed261176c181970/src/pip/_internal/utils/glibc.py
+from __future__ import absolute_import
+
+import ctypes
+import re
+import warnings
+
+
+def glibc_version_string():
+    "Returns glibc version string, or None if not using glibc."
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# Separated out from have_compatible_glibc for easier unit testing
+def check_glibc_version(version_str, required_major, minimum_minor):
+    # Parse string and check against requested version.
+    #
+    # We use a regexp instead of str.split because we want to discard any
+    # random junk that might come after the minor version -- this might happen
+    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    # uses version strings like "2.20-2014.11"). See gh-3588.
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn("Expected glibc version with 2 components major.minor,"
+                      " got: %s" % version_str, RuntimeWarning)
+        return False
+    return (int(m.group("major")) == required_major and
+            int(m.group("minor")) >= minimum_minor)
+
+
+def have_compatible_glibc(required_major, minimum_minor):
+    version_str = glibc_version_string()
+    if version_str is None:
+        return False
+    return check_glibc_version(version_str, required_major, minimum_minor)
+
+
+# platform.libc_ver regularly returns completely nonsensical glibc
+# versions. E.g. on my computer, platform says:
+#
+#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.7')
+#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.9')
+#
+# But the truth is:
+#
+#   ~$ ldd --version
+#   ldd (Debian GLIBC 2.22-11) 2.22
+#
+# This is unfortunate, because it means that the linehaul data on libc
+# versions that was generated by pip 8.1.2 and earlier is useless and
+# misleading. Solution: instead of using platform, use our code that actually
+# works.
+def libc_ver():
+    """Try to determine the glibc version
+
+    Returns a tuple of strings (lib, version) which default to empty strings
+    in case the lookup fails.
+    """
+    glibc_version = glibc_version_string()
+    if glibc_version is None:
+        return ("", "")
+    else:
+        return ("glibc", glibc_version)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glob.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glob.py
new file mode 100644
index 00000000..9d7cbc5d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/glob.py
@@ -0,0 +1,174 @@
+"""
+Filename globbing utility. Mostly a copy of `glob` from Python 3.5.
+
+Changes include:
+ * `yield from` and PEP3102 `*` removed.
+ * Hidden files are not ignored.
+"""
+
+import os
+import re
+import fnmatch
+
+__all__ = ["glob", "iglob", "escape"]
+
+
+def glob(pathname, recursive=False):
+    """Return a list of paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    return list(iglob(pathname, recursive=recursive))
+
+
+def iglob(pathname, recursive=False):
+    """Return an iterator which yields the paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    it = _iglob(pathname, recursive)
+    if recursive and _isrecursive(pathname):
+        s = next(it)  # skip empty string
+        assert not s
+    return it
+
+
+def _iglob(pathname, recursive):
+    dirname, basename = os.path.split(pathname)
+    if not has_magic(pathname):
+        if basename:
+            if os.path.lexists(pathname):
+                yield pathname
+        else:
+            # Patterns ending with a slash should match only directories
+            if os.path.isdir(dirname):
+                yield pathname
+        return
+    if not dirname:
+        if recursive and _isrecursive(basename):
+            for x in glob2(dirname, basename):
+                yield x
+        else:
+            for x in glob1(dirname, basename):
+                yield x
+        return
+    # `os.path.split()` returns the argument itself as a dirname if it is a
+    # drive or UNC path.  Prevent an infinite recursion if a drive or UNC path
+    # contains magic characters (i.e. r'\\?\C:').
+    if dirname != pathname and has_magic(dirname):
+        dirs = _iglob(dirname, recursive)
+    else:
+        dirs = [dirname]
+    if has_magic(basename):
+        if recursive and _isrecursive(basename):
+            glob_in_dir = glob2
+        else:
+            glob_in_dir = glob1
+    else:
+        glob_in_dir = glob0
+    for dirname in dirs:
+        for name in glob_in_dir(dirname, basename):
+            yield os.path.join(dirname, name)
+
+
+# These 2 helper functions non-recursively glob inside a literal directory.
+# They return a list of basenames. `glob1` accepts a pattern while `glob0`
+# takes a literal basename (so it only has to check for its existence).
+
+
+def glob1(dirname, pattern):
+    if not dirname:
+        if isinstance(pattern, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except OSError:
+        return []
+    return fnmatch.filter(names, pattern)
+
+
+def glob0(dirname, basename):
+    if not basename:
+        # `os.path.split()` returns an empty basename for paths ending with a
+        # directory separator.  'q*x/' should match only directories.
+        if os.path.isdir(dirname):
+            return [basename]
+    else:
+        if os.path.lexists(os.path.join(dirname, basename)):
+            return [basename]
+    return []
+
+
+# This helper function recursively yields relative pathnames inside a literal
+# directory.
+
+
+def glob2(dirname, pattern):
+    assert _isrecursive(pattern)
+    yield pattern[:0]
+    for x in _rlistdir(dirname):
+        yield x
+
+
+# Recursively yields relative pathnames inside a literal directory.
+def _rlistdir(dirname):
+    if not dirname:
+        if isinstance(dirname, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except os.error:
+        return
+    for x in names:
+        yield x
+        path = os.path.join(dirname, x) if dirname else x
+        for y in _rlistdir(path):
+            yield os.path.join(x, y)
+
+
+magic_check = re.compile('([*?[])')
+magic_check_bytes = re.compile(b'([*?[])')
+
+
+def has_magic(s):
+    if isinstance(s, bytes):
+        match = magic_check_bytes.search(s)
+    else:
+        match = magic_check.search(s)
+    return match is not None
+
+
+def _isrecursive(pattern):
+    if isinstance(pattern, bytes):
+        return pattern == b'**'
+    else:
+        return pattern == '**'
+
+
+def escape(pathname):
+    """Escape all special characters.
+    """
+    # Escaping is done by wrapping any of "*?[" between square brackets.
+    # Metacharacters do not work in the drive part and shouldn't be escaped.
+    drive, pathname = os.path.splitdrive(pathname)
+    if isinstance(pathname, bytes):
+        pathname = magic_check_bytes.sub(br'[\1]', pathname)
+    else:
+        pathname = magic_check.sub(r'[\1]', pathname)
+    return drive + pathname
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-32.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-32.exe
new file mode 100644
index 00000000..f8d35096
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-32.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-64.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-64.exe
new file mode 100644
index 00000000..330c51a5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui-64.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui.exe b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui.exe
new file mode 100644
index 00000000..f8d35096
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/gui.exe
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/launch.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/launch.py
new file mode 100644
index 00000000..308283ea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/launch.py
@@ -0,0 +1,35 @@
+"""
+Launch the Python script on the command line after
+setuptools is bootstrapped via import.
+"""
+
+# Note that setuptools gets imported implicitly by the
+# invocation of this script using python -m setuptools.launch
+
+import tokenize
+import sys
+
+
+def run():
+    """
+    Run the script in sys.argv[1] as if it had
+    been invoked naturally.
+    """
+    __builtins__
+    script_name = sys.argv[1]
+    namespace = dict(
+        __file__=script_name,
+        __name__='__main__',
+        __doc__=None,
+    )
+    sys.argv[:] = sys.argv[1:]
+
+    open_ = getattr(tokenize, 'open', open)
+    script = open_(script_name).read()
+    norm_script = script.replace('\\r\\n', '\\n')
+    code = compile(norm_script, script_name, 'exec')
+    exec(code, namespace)
+
+
+if __name__ == '__main__':
+    run()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/lib2to3_ex.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/lib2to3_ex.py
new file mode 100644
index 00000000..4b1a73fe
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/lib2to3_ex.py
@@ -0,0 +1,62 @@
+"""
+Customized Mixin2to3 support:
+
+ - adds support for converting doctests
+
+
+This module raises an ImportError on Python 2.
+"""
+
+from distutils.util import Mixin2to3 as _Mixin2to3
+from distutils import log
+from lib2to3.refactor import RefactoringTool, get_fixers_from_package
+
+import setuptools
+
+
+class DistutilsRefactoringTool(RefactoringTool):
+    def log_error(self, msg, *args, **kw):
+        log.error(msg, *args)
+
+    def log_message(self, msg, *args):
+        log.info(msg, *args)
+
+    def log_debug(self, msg, *args):
+        log.debug(msg, *args)
+
+
+class Mixin2to3(_Mixin2to3):
+    def run_2to3(self, files, doctests=False):
+        # See of the distribution option has been set, otherwise check the
+        # setuptools default.
+        if self.distribution.use_2to3 is not True:
+            return
+        if not files:
+            return
+        log.info("Fixing " + " ".join(files))
+        self.__build_fixer_names()
+        self.__exclude_fixers()
+        if doctests:
+            if setuptools.run_2to3_on_doctests:
+                r = DistutilsRefactoringTool(self.fixer_names)
+                r.refactor(files, write=True, doctests_only=True)
+        else:
+            _Mixin2to3.run_2to3(self, files)
+
+    def __build_fixer_names(self):
+        if self.fixer_names:
+            return
+        self.fixer_names = []
+        for p in setuptools.lib2to3_fixer_packages:
+            self.fixer_names.extend(get_fixers_from_package(p))
+        if self.distribution.use_2to3_fixers is not None:
+            for p in self.distribution.use_2to3_fixers:
+                self.fixer_names.extend(get_fixers_from_package(p))
+
+    def __exclude_fixers(self):
+        excluded_fixers = getattr(self, 'exclude_fixers', [])
+        if self.distribution.use_2to3_exclude_fixers is not None:
+            excluded_fixers.extend(self.distribution.use_2to3_exclude_fixers)
+        for fixer_name in excluded_fixers:
+            if fixer_name in self.fixer_names:
+                self.fixer_names.remove(fixer_name)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/monkey.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/monkey.py
new file mode 100644
index 00000000..3c77f8cf
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/monkey.py
@@ -0,0 +1,179 @@
+"""
+Monkey patching of distutils.
+"""
+
+import sys
+import distutils.filelist
+import platform
+import types
+import functools
+from importlib import import_module
+import inspect
+
+from setuptools.extern import six
+
+import setuptools
+
+__all__ = []
+"""
+Everything is private. Contact the project team
+if you think you need this functionality.
+"""
+
+
+def _get_mro(cls):
+    """
+    Returns the bases classes for cls sorted by the MRO.
+
+    Works around an issue on Jython where inspect.getmro will not return all
+    base classes if multiple classes share the same name. Instead, this
+    function will return a tuple containing the class itself, and the contents
+    of cls.__bases__. See https://github.com/pypa/setuptools/issues/1024.
+    """
+    if platform.python_implementation() == "Jython":
+        return (cls,) + cls.__bases__
+    return inspect.getmro(cls)
+
+
+def get_unpatched(item):
+    lookup = (
+        get_unpatched_class if isinstance(item, six.class_types) else
+        get_unpatched_function if isinstance(item, types.FunctionType) else
+        lambda item: None
+    )
+    return lookup(item)
+
+
+def get_unpatched_class(cls):
+    """Protect against re-patching the distutils if reloaded
+
+    Also ensures that no other distutils extension monkeypatched the distutils
+    first.
+    """
+    external_bases = (
+        cls
+        for cls in _get_mro(cls)
+        if not cls.__module__.startswith('setuptools')
+    )
+    base = next(external_bases)
+    if not base.__module__.startswith('distutils'):
+        msg = "distutils has already been patched by %r" % cls
+        raise AssertionError(msg)
+    return base
+
+
+def patch_all():
+    # we can't patch distutils.cmd, alas
+    distutils.core.Command = setuptools.Command
+
+    has_issue_12885 = sys.version_info <= (3, 5, 3)
+
+    if has_issue_12885:
+        # fix findall bug in distutils (http://bugs.python.org/issue12885)
+        distutils.filelist.findall = setuptools.findall
+
+    needs_warehouse = (
+        sys.version_info < (2, 7, 13)
+        or
+        (3, 4) < sys.version_info < (3, 4, 6)
+        or
+        (3, 5) < sys.version_info <= (3, 5, 3)
+    )
+
+    if needs_warehouse:
+        warehouse = 'https://upload.pypi.org/legacy/'
+        distutils.config.PyPIRCCommand.DEFAULT_REPOSITORY = warehouse
+
+    _patch_distribution_metadata()
+
+    # Install Distribution throughout the distutils
+    for module in distutils.dist, distutils.core, distutils.cmd:
+        module.Distribution = setuptools.dist.Distribution
+
+    # Install the patched Extension
+    distutils.core.Extension = setuptools.extension.Extension
+    distutils.extension.Extension = setuptools.extension.Extension
+    if 'distutils.command.build_ext' in sys.modules:
+        sys.modules['distutils.command.build_ext'].Extension = (
+            setuptools.extension.Extension
+        )
+
+    patch_for_msvc_specialized_compiler()
+
+
+def _patch_distribution_metadata():
+    """Patch write_pkg_file and read_pkg_file for higher metadata standards"""
+    for attr in ('write_pkg_file', 'read_pkg_file', 'get_metadata_version'):
+        new_val = getattr(setuptools.dist, attr)
+        setattr(distutils.dist.DistributionMetadata, attr, new_val)
+
+
+def patch_func(replacement, target_mod, func_name):
+    """
+    Patch func_name in target_mod with replacement
+
+    Important - original must be resolved by name to avoid
+    patching an already patched function.
+    """
+    original = getattr(target_mod, func_name)
+
+    # set the 'unpatched' attribute on the replacement to
+    # point to the original.
+    vars(replacement).setdefault('unpatched', original)
+
+    # replace the function in the original module
+    setattr(target_mod, func_name, replacement)
+
+
+def get_unpatched_function(candidate):
+    return getattr(candidate, 'unpatched')
+
+
+def patch_for_msvc_specialized_compiler():
+    """
+    Patch functions in distutils to use standalone Microsoft Visual C++
+    compilers.
+    """
+    # import late to avoid circular imports on Python < 3.5
+    msvc = import_module('setuptools.msvc')
+
+    if platform.system() != 'Windows':
+        # Compilers only availables on Microsoft Windows
+        return
+
+    def patch_params(mod_name, func_name):
+        """
+        Prepare the parameters for patch_func to patch indicated function.
+        """
+        repl_prefix = 'msvc9_' if 'msvc9' in mod_name else 'msvc14_'
+        repl_name = repl_prefix + func_name.lstrip('_')
+        repl = getattr(msvc, repl_name)
+        mod = import_module(mod_name)
+        if not hasattr(mod, func_name):
+            raise ImportError(func_name)
+        return repl, mod, func_name
+
+    # Python 2.7 to 3.4
+    msvc9 = functools.partial(patch_params, 'distutils.msvc9compiler')
+
+    # Python 3.5+
+    msvc14 = functools.partial(patch_params, 'distutils._msvccompiler')
+
+    try:
+        # Patch distutils.msvc9compiler
+        patch_func(*msvc9('find_vcvarsall'))
+        patch_func(*msvc9('query_vcvarsall'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler._get_vc_env
+        patch_func(*msvc14('_get_vc_env'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler.gen_lib_options for Numpy
+        patch_func(*msvc14('gen_lib_options'))
+    except ImportError:
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/msvc.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/msvc.py
new file mode 100644
index 00000000..b9c472f1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/msvc.py
@@ -0,0 +1,1301 @@
+"""
+Improved support for Microsoft Visual C++ compilers.
+
+Known supported compilers:
+--------------------------
+Microsoft Visual C++ 9.0:
+    Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64)
+    Microsoft Windows SDK 6.1 (x86, x64, ia64)
+    Microsoft Windows SDK 7.0 (x86, x64, ia64)
+
+Microsoft Visual C++ 10.0:
+    Microsoft Windows SDK 7.1 (x86, x64, ia64)
+
+Microsoft Visual C++ 14.0:
+    Microsoft Visual C++ Build Tools 2015 (x86, x64, arm)
+    Microsoft Visual Studio 2017 (x86, x64, arm, arm64)
+    Microsoft Visual Studio Build Tools 2017 (x86, x64, arm, arm64)
+"""
+
+import os
+import sys
+import platform
+import itertools
+import distutils.errors
+from setuptools.extern.packaging.version import LegacyVersion
+
+from setuptools.extern.six.moves import filterfalse
+
+from .monkey import get_unpatched
+
+if platform.system() == 'Windows':
+    from setuptools.extern.six.moves import winreg
+    safe_env = os.environ
+else:
+    """
+    Mock winreg and environ so the module can be imported
+    on this platform.
+    """
+
+    class winreg:
+        HKEY_USERS = None
+        HKEY_CURRENT_USER = None
+        HKEY_LOCAL_MACHINE = None
+        HKEY_CLASSES_ROOT = None
+
+    safe_env = dict()
+
+_msvc9_suppress_errors = (
+    # msvc9compiler isn't available on some platforms
+    ImportError,
+
+    # msvc9compiler raises DistutilsPlatformError in some
+    # environments. See #1118.
+    distutils.errors.DistutilsPlatformError,
+)
+
+try:
+    from distutils.msvc9compiler import Reg
+except _msvc9_suppress_errors:
+    pass
+
+
+def msvc9_find_vcvarsall(version):
+    """
+    Patched "distutils.msvc9compiler.find_vcvarsall" to use the standalone
+    compiler build for Python (VCForPython). Fall back to original behavior
+    when the standalone compiler is not available.
+
+    Redirect the path of "vcvarsall.bat".
+
+    Known supported compilers
+    -------------------------
+    Microsoft Visual C++ 9.0:
+        Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64)
+
+    Parameters
+    ----------
+    version: float
+        Required Microsoft Visual C++ version.
+
+    Return
+    ------
+    vcvarsall.bat path: str
+    """
+    VC_BASE = r'Software\%sMicrosoft\DevDiv\VCForPython\%0.1f'
+    key = VC_BASE % ('', version)
+    try:
+        # Per-user installs register the compiler path here
+        productdir = Reg.get_value(key, "installdir")
+    except KeyError:
+        try:
+            # All-user installs on a 64-bit system register here
+            key = VC_BASE % ('Wow6432Node\\', version)
+            productdir = Reg.get_value(key, "installdir")
+        except KeyError:
+            productdir = None
+
+    if productdir:
+        vcvarsall = os.path.os.path.join(productdir, "vcvarsall.bat")
+        if os.path.isfile(vcvarsall):
+            return vcvarsall
+
+    return get_unpatched(msvc9_find_vcvarsall)(version)
+
+
+def msvc9_query_vcvarsall(ver, arch='x86', *args, **kwargs):
+    """
+    Patched "distutils.msvc9compiler.query_vcvarsall" for support extra
+    compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Known supported compilers
+    -------------------------
+    Microsoft Visual C++ 9.0:
+        Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64)
+        Microsoft Windows SDK 6.1 (x86, x64, ia64)
+        Microsoft Windows SDK 7.0 (x86, x64, ia64)
+
+    Microsoft Visual C++ 10.0:
+        Microsoft Windows SDK 7.1 (x86, x64, ia64)
+
+    Parameters
+    ----------
+    ver: float
+        Required Microsoft Visual C++ version.
+    arch: str
+        Target architecture.
+
+    Return
+    ------
+    environment: dict
+    """
+    # Try to get environement from vcvarsall.bat (Classical way)
+    try:
+        orig = get_unpatched(msvc9_query_vcvarsall)
+        return orig(ver, arch, *args, **kwargs)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error if Vcvarsall.bat is missing
+        pass
+    except ValueError:
+        # Pass error if environment not set after executing vcvarsall.bat
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(arch, ver).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, ver, arch)
+        raise
+
+
+def msvc14_get_vc_env(plat_spec):
+    """
+    Patched "distutils._msvccompiler._get_vc_env" for support extra
+    compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Known supported compilers
+    -------------------------
+    Microsoft Visual C++ 14.0:
+        Microsoft Visual C++ Build Tools 2015 (x86, x64, arm)
+        Microsoft Visual Studio 2017 (x86, x64, arm, arm64)
+        Microsoft Visual Studio Build Tools 2017 (x86, x64, arm, arm64)
+
+    Parameters
+    ----------
+    plat_spec: str
+        Target architecture.
+
+    Return
+    ------
+    environment: dict
+    """
+    # Try to get environment from vcvarsall.bat (Classical way)
+    try:
+        return get_unpatched(msvc14_get_vc_env)(plat_spec)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error Vcvarsall.bat is missing
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(plat_spec, vc_min_ver=14.0).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, 14.0)
+        raise
+
+
+def msvc14_gen_lib_options(*args, **kwargs):
+    """
+    Patched "distutils._msvccompiler.gen_lib_options" for fix
+    compatibility between "numpy.distutils" and "distutils._msvccompiler"
+    (for Numpy < 1.11.2)
+    """
+    if "numpy.distutils" in sys.modules:
+        import numpy as np
+        if LegacyVersion(np.__version__) < LegacyVersion('1.11.2'):
+            return np.distutils.ccompiler.gen_lib_options(*args, **kwargs)
+    return get_unpatched(msvc14_gen_lib_options)(*args, **kwargs)
+
+
+def _augment_exception(exc, version, arch=''):
+    """
+    Add details to the exception message to help guide the user
+    as to what action will resolve it.
+    """
+    # Error if MSVC++ directory not found or environment not set
+    message = exc.args[0]
+
+    if "vcvarsall" in message.lower() or "visual c" in message.lower():
+        # Special error message if MSVC++ not installed
+        tmpl = 'Microsoft Visual C++ {version:0.1f} is required.'
+        message = tmpl.format(**locals())
+        msdownload = 'www.microsoft.com/download/details.aspx?id=%d'
+        if version == 9.0:
+            if arch.lower().find('ia64') > -1:
+                # For VC++ 9.0, if IA64 support is needed, redirect user
+                # to Windows SDK 7.0
+                message += ' Get it with "Microsoft Windows SDK 7.0": '
+                message += msdownload % 3138
+            else:
+                # For VC++ 9.0 redirect user to Vc++ for Python 2.7 :
+                # This redirection link is maintained by Microsoft.
+                # Contact vspython@microsoft.com if it needs updating.
+                message += ' Get it from http://aka.ms/vcpython27'
+        elif version == 10.0:
+            # For VC++ 10.0 Redirect user to Windows SDK 7.1
+            message += ' Get it with "Microsoft Windows SDK 7.1": '
+            message += msdownload % 8279
+        elif version >= 14.0:
+            # For VC++ 14.0 Redirect user to Visual C++ Build Tools
+            message += (' Get it with "Microsoft Visual C++ Build Tools": '
+                        r'https://visualstudio.microsoft.com/downloads/')
+
+    exc.args = (message, )
+
+
+class PlatformInfo:
+    """
+    Current and Target Architectures informations.
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    """
+    current_cpu = safe_env.get('processor_architecture', '').lower()
+
+    def __init__(self, arch):
+        self.arch = arch.lower().replace('x64', 'amd64')
+
+    @property
+    def target_cpu(self):
+        return self.arch[self.arch.find('_') + 1:]
+
+    def target_is_x86(self):
+        return self.target_cpu == 'x86'
+
+    def current_is_x86(self):
+        return self.current_cpu == 'x86'
+
+    def current_dir(self, hidex86=False, x64=False):
+        """
+        Current platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        subfolder: str
+            '\target', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.current_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.current_cpu == 'amd64' and x64) else
+            r'\%s' % self.current_cpu
+        )
+
+    def target_dir(self, hidex86=False, x64=False):
+        r"""
+        Target platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        subfolder: str
+            '\current', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.target_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.target_cpu == 'amd64' and x64) else
+            r'\%s' % self.target_cpu
+        )
+
+    def cross_dir(self, forcex86=False):
+        r"""
+        Cross platform specific subfolder.
+
+        Parameters
+        ----------
+        forcex86: bool
+            Use 'x86' as current architecture even if current acritecture is
+            not x86.
+
+        Return
+        ------
+        subfolder: str
+            '' if target architecture is current architecture,
+            '\current_target' if not.
+        """
+        current = 'x86' if forcex86 else self.current_cpu
+        return (
+            '' if self.target_cpu == current else
+            self.target_dir().replace('\\', '\\%s_' % current)
+        )
+
+
+class RegistryInfo:
+    """
+    Microsoft Visual Studio related registry informations.
+
+    Parameters
+    ----------
+    platform_info: PlatformInfo
+        "PlatformInfo" instance.
+    """
+    HKEYS = (winreg.HKEY_USERS,
+             winreg.HKEY_CURRENT_USER,
+             winreg.HKEY_LOCAL_MACHINE,
+             winreg.HKEY_CLASSES_ROOT)
+
+    def __init__(self, platform_info):
+        self.pi = platform_info
+
+    @property
+    def visualstudio(self):
+        """
+        Microsoft Visual Studio root registry key.
+        """
+        return 'VisualStudio'
+
+    @property
+    def sxs(self):
+        """
+        Microsoft Visual Studio SxS registry key.
+        """
+        return os.path.join(self.visualstudio, 'SxS')
+
+    @property
+    def vc(self):
+        """
+        Microsoft Visual C++ VC7 registry key.
+        """
+        return os.path.join(self.sxs, 'VC7')
+
+    @property
+    def vs(self):
+        """
+        Microsoft Visual Studio VS7 registry key.
+        """
+        return os.path.join(self.sxs, 'VS7')
+
+    @property
+    def vc_for_python(self):
+        """
+        Microsoft Visual C++ for Python registry key.
+        """
+        return r'DevDiv\VCForPython'
+
+    @property
+    def microsoft_sdk(self):
+        """
+        Microsoft SDK registry key.
+        """
+        return 'Microsoft SDKs'
+
+    @property
+    def windows_sdk(self):
+        """
+        Microsoft Windows/Platform SDK registry key.
+        """
+        return os.path.join(self.microsoft_sdk, 'Windows')
+
+    @property
+    def netfx_sdk(self):
+        """
+        Microsoft .NET Framework SDK registry key.
+        """
+        return os.path.join(self.microsoft_sdk, 'NETFXSDK')
+
+    @property
+    def windows_kits_roots(self):
+        """
+        Microsoft Windows Kits Roots registry key.
+        """
+        return r'Windows Kits\Installed Roots'
+
+    def microsoft(self, key, x86=False):
+        """
+        Return key in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        x86: str
+            Force x86 software registry.
+
+        Return
+        ------
+        str: value
+        """
+        node64 = '' if self.pi.current_is_x86() or x86 else 'Wow6432Node'
+        return os.path.join('Software', node64, 'Microsoft', key)
+
+    def lookup(self, key, name):
+        """
+        Look for values in registry in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        name: str
+            Value name to find.
+
+        Return
+        ------
+        str: value
+        """
+        KEY_READ = winreg.KEY_READ
+        openkey = winreg.OpenKey
+        ms = self.microsoft
+        for hkey in self.HKEYS:
+            try:
+                bkey = openkey(hkey, ms(key), 0, KEY_READ)
+            except (OSError, IOError):
+                if not self.pi.current_is_x86():
+                    try:
+                        bkey = openkey(hkey, ms(key, True), 0, KEY_READ)
+                    except (OSError, IOError):
+                        continue
+                else:
+                    continue
+            try:
+                return winreg.QueryValueEx(bkey, name)[0]
+            except (OSError, IOError):
+                pass
+
+
+class SystemInfo:
+    """
+    Microsoft Windows and Visual Studio related system inormations.
+
+    Parameters
+    ----------
+    registry_info: RegistryInfo
+        "RegistryInfo" instance.
+    vc_ver: float
+        Required Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparaison.
+    WinDir = safe_env.get('WinDir', '')
+    ProgramFiles = safe_env.get('ProgramFiles', '')
+    ProgramFilesx86 = safe_env.get('ProgramFiles(x86)', ProgramFiles)
+
+    def __init__(self, registry_info, vc_ver=None):
+        self.ri = registry_info
+        self.pi = self.ri.pi
+        self.vc_ver = vc_ver or self._find_latest_available_vc_ver()
+
+    def _find_latest_available_vc_ver(self):
+        try:
+            return self.find_available_vc_vers()[-1]
+        except IndexError:
+            err = 'No Microsoft Visual C++ version found'
+            raise distutils.errors.DistutilsPlatformError(err)
+
+    def find_available_vc_vers(self):
+        """
+        Find all available Microsoft Visual C++ versions.
+        """
+        ms = self.ri.microsoft
+        vckeys = (self.ri.vc, self.ri.vc_for_python, self.ri.vs)
+        vc_vers = []
+        for hkey in self.ri.HKEYS:
+            for key in vckeys:
+                try:
+                    bkey = winreg.OpenKey(hkey, ms(key), 0, winreg.KEY_READ)
+                except (OSError, IOError):
+                    continue
+                subkeys, values, _ = winreg.QueryInfoKey(bkey)
+                for i in range(values):
+                    try:
+                        ver = float(winreg.EnumValue(bkey, i)[0])
+                        if ver not in vc_vers:
+                            vc_vers.append(ver)
+                    except ValueError:
+                        pass
+                for i in range(subkeys):
+                    try:
+                        ver = float(winreg.EnumKey(bkey, i))
+                        if ver not in vc_vers:
+                            vc_vers.append(ver)
+                    except ValueError:
+                        pass
+        return sorted(vc_vers)
+
+    @property
+    def VSInstallDir(self):
+        """
+        Microsoft Visual Studio directory.
+        """
+        # Default path
+        name = 'Microsoft Visual Studio %0.1f' % self.vc_ver
+        default = os.path.join(self.ProgramFilesx86, name)
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vs, '%0.1f' % self.vc_ver) or default
+
+    @property
+    def VCInstallDir(self):
+        """
+        Microsoft Visual C++ directory.
+        """
+        self.VSInstallDir
+
+        guess_vc = self._guess_vc() or self._guess_vc_legacy()
+
+        # Try to get "VC++ for Python" path from registry as default path
+        reg_path = os.path.join(self.ri.vc_for_python, '%0.1f' % self.vc_ver)
+        python_vc = self.ri.lookup(reg_path, 'installdir')
+        default_vc = os.path.join(python_vc, 'VC') if python_vc else guess_vc
+
+        # Try to get path from registry, if fail use default path
+        path = self.ri.lookup(self.ri.vc, '%0.1f' % self.vc_ver) or default_vc
+
+        if not os.path.isdir(path):
+            msg = 'Microsoft Visual C++ directory not found'
+            raise distutils.errors.DistutilsPlatformError(msg)
+
+        return path
+
+    def _guess_vc(self):
+        """
+        Locate Visual C for 2017
+        """
+        if self.vc_ver <= 14.0:
+            return
+
+        default = r'VC\Tools\MSVC'
+        guess_vc = os.path.join(self.VSInstallDir, default)
+        # Subdir with VC exact version as name
+        try:
+            vc_exact_ver = os.listdir(guess_vc)[-1]
+            return os.path.join(guess_vc, vc_exact_ver)
+        except (OSError, IOError, IndexError):
+            pass
+
+    def _guess_vc_legacy(self):
+        """
+        Locate Visual C for versions prior to 2017
+        """
+        default = r'Microsoft Visual Studio %0.1f\VC' % self.vc_ver
+        return os.path.join(self.ProgramFilesx86, default)
+
+    @property
+    def WindowsSdkVersion(self):
+        """
+        Microsoft Windows SDK versions for specified MSVC++ version.
+        """
+        if self.vc_ver <= 9.0:
+            return ('7.0', '6.1', '6.0a')
+        elif self.vc_ver == 10.0:
+            return ('7.1', '7.0a')
+        elif self.vc_ver == 11.0:
+            return ('8.0', '8.0a')
+        elif self.vc_ver == 12.0:
+            return ('8.1', '8.1a')
+        elif self.vc_ver >= 14.0:
+            return ('10.0', '8.1')
+
+    @property
+    def WindowsSdkLastVersion(self):
+        """
+        Microsoft Windows SDK last version
+        """
+        return self._use_last_dir_name(os.path.join(
+            self.WindowsSdkDir, 'lib'))
+
+    @property
+    def WindowsSdkDir(self):
+        """
+        Microsoft Windows SDK directory.
+        """
+        sdkdir = ''
+        for ver in self.WindowsSdkVersion:
+            # Try to get it from registry
+            loc = os.path.join(self.ri.windows_sdk, 'v%s' % ver)
+            sdkdir = self.ri.lookup(loc, 'installationfolder')
+            if sdkdir:
+                break
+        if not sdkdir or not os.path.isdir(sdkdir):
+            # Try to get "VC++ for Python" version from registry
+            path = os.path.join(self.ri.vc_for_python, '%0.1f' % self.vc_ver)
+            install_base = self.ri.lookup(path, 'installdir')
+            if install_base:
+                sdkdir = os.path.join(install_base, 'WinSDK')
+        if not sdkdir or not os.path.isdir(sdkdir):
+            # If fail, use default new path
+            for ver in self.WindowsSdkVersion:
+                intver = ver[:ver.rfind('.')]
+                path = r'Microsoft SDKs\Windows Kits\%s' % (intver)
+                d = os.path.join(self.ProgramFiles, path)
+                if os.path.isdir(d):
+                    sdkdir = d
+        if not sdkdir or not os.path.isdir(sdkdir):
+            # If fail, use default old path
+            for ver in self.WindowsSdkVersion:
+                path = r'Microsoft SDKs\Windows\v%s' % ver
+                d = os.path.join(self.ProgramFiles, path)
+                if os.path.isdir(d):
+                    sdkdir = d
+        if not sdkdir:
+            # If fail, use Platform SDK
+            sdkdir = os.path.join(self.VCInstallDir, 'PlatformSDK')
+        return sdkdir
+
+    @property
+    def WindowsSDKExecutablePath(self):
+        """
+        Microsoft Windows SDK executable directory.
+        """
+        # Find WinSDK NetFx Tools registry dir name
+        if self.vc_ver <= 11.0:
+            netfxver = 35
+            arch = ''
+        else:
+            netfxver = 40
+            hidex86 = True if self.vc_ver <= 12.0 else False
+            arch = self.pi.current_dir(x64=True, hidex86=hidex86)
+        fx = 'WinSDK-NetFx%dTools%s' % (netfxver, arch.replace('\\', '-'))
+
+        # liste all possibles registry paths
+        regpaths = []
+        if self.vc_ver >= 14.0:
+            for ver in self.NetFxSdkVersion:
+                regpaths += [os.path.join(self.ri.netfx_sdk, ver, fx)]
+
+        for ver in self.WindowsSdkVersion:
+            regpaths += [os.path.join(self.ri.windows_sdk, 'v%sA' % ver, fx)]
+
+        # Return installation folder from the more recent path
+        for path in regpaths:
+            execpath = self.ri.lookup(path, 'installationfolder')
+            if execpath:
+                break
+        return execpath
+
+    @property
+    def FSharpInstallDir(self):
+        """
+        Microsoft Visual F# directory.
+        """
+        path = r'%0.1f\Setup\F#' % self.vc_ver
+        path = os.path.join(self.ri.visualstudio, path)
+        return self.ri.lookup(path, 'productdir') or ''
+
+    @property
+    def UniversalCRTSdkDir(self):
+        """
+        Microsoft Universal CRT SDK directory.
+        """
+        # Set Kit Roots versions for specified MSVC++ version
+        if self.vc_ver >= 14.0:
+            vers = ('10', '81')
+        else:
+            vers = ()
+
+        # Find path of the more recent Kit
+        for ver in vers:
+            sdkdir = self.ri.lookup(self.ri.windows_kits_roots,
+                                    'kitsroot%s' % ver)
+            if sdkdir:
+                break
+        return sdkdir or ''
+
+    @property
+    def UniversalCRTSdkLastVersion(self):
+        """
+        Microsoft Universal C Runtime SDK last version
+        """
+        return self._use_last_dir_name(os.path.join(
+            self.UniversalCRTSdkDir, 'lib'))
+
+    @property
+    def NetFxSdkVersion(self):
+        """
+        Microsoft .NET Framework SDK versions.
+        """
+        # Set FxSdk versions for specified MSVC++ version
+        if self.vc_ver >= 14.0:
+            return ('4.6.1', '4.6')
+        else:
+            return ()
+
+    @property
+    def NetFxSdkDir(self):
+        """
+        Microsoft .NET Framework SDK directory.
+        """
+        for ver in self.NetFxSdkVersion:
+            loc = os.path.join(self.ri.netfx_sdk, ver)
+            sdkdir = self.ri.lookup(loc, 'kitsinstallationfolder')
+            if sdkdir:
+                break
+        return sdkdir or ''
+
+    @property
+    def FrameworkDir32(self):
+        """
+        Microsoft .NET Framework 32bit directory.
+        """
+        # Default path
+        guess_fw = os.path.join(self.WinDir, r'Microsoft.NET\Framework')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir32') or guess_fw
+
+    @property
+    def FrameworkDir64(self):
+        """
+        Microsoft .NET Framework 64bit directory.
+        """
+        # Default path
+        guess_fw = os.path.join(self.WinDir, r'Microsoft.NET\Framework64')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir64') or guess_fw
+
+    @property
+    def FrameworkVersion32(self):
+        """
+        Microsoft .NET Framework 32bit versions.
+        """
+        return self._find_dot_net_versions(32)
+
+    @property
+    def FrameworkVersion64(self):
+        """
+        Microsoft .NET Framework 64bit versions.
+        """
+        return self._find_dot_net_versions(64)
+
+    def _find_dot_net_versions(self, bits):
+        """
+        Find Microsoft .NET Framework versions.
+
+        Parameters
+        ----------
+        bits: int
+            Platform number of bits: 32 or 64.
+        """
+        # Find actual .NET version in registry
+        reg_ver = self.ri.lookup(self.ri.vc, 'frameworkver%d' % bits)
+        dot_net_dir = getattr(self, 'FrameworkDir%d' % bits)
+        ver = reg_ver or self._use_last_dir_name(dot_net_dir, 'v') or ''
+
+        # Set .NET versions for specified MSVC++ version
+        if self.vc_ver >= 12.0:
+            frameworkver = (ver, 'v4.0')
+        elif self.vc_ver >= 10.0:
+            frameworkver = ('v4.0.30319' if ver.lower()[:2] != 'v4' else ver,
+                            'v3.5')
+        elif self.vc_ver == 9.0:
+            frameworkver = ('v3.5', 'v2.0.50727')
+        if self.vc_ver == 8.0:
+            frameworkver = ('v3.0', 'v2.0.50727')
+        return frameworkver
+
+    def _use_last_dir_name(self, path, prefix=''):
+        """
+        Return name of the last dir in path or '' if no dir found.
+
+        Parameters
+        ----------
+        path: str
+            Use dirs in this path
+        prefix: str
+            Use only dirs startings by this prefix
+        """
+        matching_dirs = (
+            dir_name
+            for dir_name in reversed(os.listdir(path))
+            if os.path.isdir(os.path.join(path, dir_name)) and
+            dir_name.startswith(prefix)
+        )
+        return next(matching_dirs, None) or ''
+
+
+class EnvironmentInfo:
+    """
+    Return environment variables for specified Microsoft Visual C++ version
+    and platform : Lib, Include, Path and libpath.
+
+    This function is compatible with Microsoft Visual C++ 9.0 to 14.0.
+
+    Script created by analysing Microsoft environment configuration files like
+    "vcvars[...].bat", "SetEnv.Cmd", "vcbuildtools.bat", ...
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    vc_ver: float
+        Required Microsoft Visual C++ version. If not set, autodetect the last
+        version.
+    vc_min_ver: float
+        Minimum Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparaison.
+
+    def __init__(self, arch, vc_ver=None, vc_min_ver=0):
+        self.pi = PlatformInfo(arch)
+        self.ri = RegistryInfo(self.pi)
+        self.si = SystemInfo(self.ri, vc_ver)
+
+        if self.vc_ver < vc_min_ver:
+            err = 'No suitable Microsoft Visual C++ version found'
+            raise distutils.errors.DistutilsPlatformError(err)
+
+    @property
+    def vc_ver(self):
+        """
+        Microsoft Visual C++ version.
+        """
+        return self.si.vc_ver
+
+    @property
+    def VSTools(self):
+        """
+        Microsoft Visual Studio Tools
+        """
+        paths = [r'Common7\IDE', r'Common7\Tools']
+
+        if self.vc_ver >= 14.0:
+            arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            paths += [r'Common7\IDE\CommonExtensions\Microsoft\TestWindow']
+            paths += [r'Team Tools\Performance Tools']
+            paths += [r'Team Tools\Performance Tools%s' % arch_subdir]
+
+        return [os.path.join(self.si.VSInstallDir, path) for path in paths]
+
+    @property
+    def VCIncludes(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Includes
+        """
+        return [os.path.join(self.si.VCInstallDir, 'Include'),
+                os.path.join(self.si.VCInstallDir, r'ATLMFC\Include')]
+
+    @property
+    def VCLibraries(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Libraries
+        """
+        if self.vc_ver >= 15.0:
+            arch_subdir = self.pi.target_dir(x64=True)
+        else:
+            arch_subdir = self.pi.target_dir(hidex86=True)
+        paths = ['Lib%s' % arch_subdir, r'ATLMFC\Lib%s' % arch_subdir]
+
+        if self.vc_ver >= 14.0:
+            paths += [r'Lib\store%s' % arch_subdir]
+
+        return [os.path.join(self.si.VCInstallDir, path) for path in paths]
+
+    @property
+    def VCStoreRefs(self):
+        """
+        Microsoft Visual C++ store references Libraries
+        """
+        if self.vc_ver < 14.0:
+            return []
+        return [os.path.join(self.si.VCInstallDir, r'Lib\store\references')]
+
+    @property
+    def VCTools(self):
+        """
+        Microsoft Visual C++ Tools
+        """
+        si = self.si
+        tools = [os.path.join(si.VCInstallDir, 'VCPackages')]
+
+        forcex86 = True if self.vc_ver <= 10.0 else False
+        arch_subdir = self.pi.cross_dir(forcex86)
+        if arch_subdir:
+            tools += [os.path.join(si.VCInstallDir, 'Bin%s' % arch_subdir)]
+
+        if self.vc_ver == 14.0:
+            path = 'Bin%s' % self.pi.current_dir(hidex86=True)
+            tools += [os.path.join(si.VCInstallDir, path)]
+
+        elif self.vc_ver >= 15.0:
+            host_dir = (r'bin\HostX86%s' if self.pi.current_is_x86() else
+                        r'bin\HostX64%s')
+            tools += [os.path.join(
+                si.VCInstallDir, host_dir % self.pi.target_dir(x64=True))]
+
+            if self.pi.current_cpu != self.pi.target_cpu:
+                tools += [os.path.join(
+                    si.VCInstallDir, host_dir % self.pi.current_dir(x64=True))]
+
+        else:
+            tools += [os.path.join(si.VCInstallDir, 'Bin')]
+
+        return tools
+
+    @property
+    def OSLibraries(self):
+        """
+        Microsoft Windows SDK Libraries
+        """
+        if self.vc_ver <= 10.0:
+            arch_subdir = self.pi.target_dir(hidex86=True, x64=True)
+            return [os.path.join(self.si.WindowsSdkDir, 'Lib%s' % arch_subdir)]
+
+        else:
+            arch_subdir = self.pi.target_dir(x64=True)
+            lib = os.path.join(self.si.WindowsSdkDir, 'lib')
+            libver = self._sdk_subdir
+            return [os.path.join(lib, '%sum%s' % (libver , arch_subdir))]
+
+    @property
+    def OSIncludes(self):
+        """
+        Microsoft Windows SDK Include
+        """
+        include = os.path.join(self.si.WindowsSdkDir, 'include')
+
+        if self.vc_ver <= 10.0:
+            return [include, os.path.join(include, 'gl')]
+
+        else:
+            if self.vc_ver >= 14.0:
+                sdkver = self._sdk_subdir
+            else:
+                sdkver = ''
+            return [os.path.join(include, '%sshared' % sdkver),
+                    os.path.join(include, '%sum' % sdkver),
+                    os.path.join(include, '%swinrt' % sdkver)]
+
+    @property
+    def OSLibpath(self):
+        """
+        Microsoft Windows SDK Libraries Paths
+        """
+        ref = os.path.join(self.si.WindowsSdkDir, 'References')
+        libpath = []
+
+        if self.vc_ver <= 9.0:
+            libpath += self.OSLibraries
+
+        if self.vc_ver >= 11.0:
+            libpath += [os.path.join(ref, r'CommonConfiguration\Neutral')]
+
+        if self.vc_ver >= 14.0:
+            libpath += [
+                ref,
+                os.path.join(self.si.WindowsSdkDir, 'UnionMetadata'),
+                os.path.join(
+                    ref,
+                    'Windows.Foundation.UniversalApiContract',
+                    '1.0.0.0',
+                ),
+                os.path.join(
+                    ref,
+                    'Windows.Foundation.FoundationContract',
+                    '1.0.0.0',
+                ),
+                os.path.join(
+                    ref,
+                    'Windows.Networking.Connectivity.WwanContract',
+                    '1.0.0.0',
+                ),
+                os.path.join(
+                    self.si.WindowsSdkDir,
+                    'ExtensionSDKs',
+                    'Microsoft.VCLibs',
+                    '%0.1f' % self.vc_ver,
+                    'References',
+                    'CommonConfiguration',
+                    'neutral',
+                ),
+            ]
+        return libpath
+
+    @property
+    def SdkTools(self):
+        """
+        Microsoft Windows SDK Tools
+        """
+        return list(self._sdk_tools())
+
+    def _sdk_tools(self):
+        """
+        Microsoft Windows SDK Tools paths generator
+        """
+        if self.vc_ver < 15.0:
+            bin_dir = 'Bin' if self.vc_ver <= 11.0 else r'Bin\x86'
+            yield os.path.join(self.si.WindowsSdkDir, bin_dir)
+
+        if not self.pi.current_is_x86():
+            arch_subdir = self.pi.current_dir(x64=True)
+            path = 'Bin%s' % arch_subdir
+            yield os.path.join(self.si.WindowsSdkDir, path)
+
+        if self.vc_ver == 10.0 or self.vc_ver == 11.0:
+            if self.pi.target_is_x86():
+                arch_subdir = ''
+            else:
+                arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            path = r'Bin\NETFX 4.0 Tools%s' % arch_subdir
+            yield os.path.join(self.si.WindowsSdkDir, path)
+
+        elif self.vc_ver >= 15.0:
+            path = os.path.join(self.si.WindowsSdkDir, 'Bin')
+            arch_subdir = self.pi.current_dir(x64=True)
+            sdkver = self.si.WindowsSdkLastVersion
+            yield os.path.join(path, '%s%s' % (sdkver, arch_subdir))
+
+        if self.si.WindowsSDKExecutablePath:
+            yield self.si.WindowsSDKExecutablePath
+
+    @property
+    def _sdk_subdir(self):
+        """
+        Microsoft Windows SDK version subdir
+        """
+        ucrtver = self.si.WindowsSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def SdkSetup(self):
+        """
+        Microsoft Windows SDK Setup
+        """
+        if self.vc_ver > 9.0:
+            return []
+
+        return [os.path.join(self.si.WindowsSdkDir, 'Setup')]
+
+    @property
+    def FxTools(self):
+        """
+        Microsoft .NET Framework Tools
+        """
+        pi = self.pi
+        si = self.si
+
+        if self.vc_ver <= 10.0:
+            include32 = True
+            include64 = not pi.target_is_x86() and not pi.current_is_x86()
+        else:
+            include32 = pi.target_is_x86() or pi.current_is_x86()
+            include64 = pi.current_cpu == 'amd64' or pi.target_cpu == 'amd64'
+
+        tools = []
+        if include32:
+            tools += [os.path.join(si.FrameworkDir32, ver)
+                      for ver in si.FrameworkVersion32]
+        if include64:
+            tools += [os.path.join(si.FrameworkDir64, ver)
+                      for ver in si.FrameworkVersion64]
+        return tools
+
+    @property
+    def NetFxSDKLibraries(self):
+        """
+        Microsoft .Net Framework SDK Libraries
+        """
+        if self.vc_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        return [os.path.join(self.si.NetFxSdkDir, r'lib\um%s' % arch_subdir)]
+
+    @property
+    def NetFxSDKIncludes(self):
+        """
+        Microsoft .Net Framework SDK Includes
+        """
+        if self.vc_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        return [os.path.join(self.si.NetFxSdkDir, r'include\um')]
+
+    @property
+    def VsTDb(self):
+        """
+        Microsoft Visual Studio Team System Database
+        """
+        return [os.path.join(self.si.VSInstallDir, r'VSTSDB\Deploy')]
+
+    @property
+    def MSBuild(self):
+        """
+        Microsoft Build Engine
+        """
+        if self.vc_ver < 12.0:
+            return []
+        elif self.vc_ver < 15.0:
+            base_path = self.si.ProgramFilesx86
+            arch_subdir = self.pi.current_dir(hidex86=True)
+        else:
+            base_path = self.si.VSInstallDir
+            arch_subdir = ''
+
+        path = r'MSBuild\%0.1f\bin%s' % (self.vc_ver, arch_subdir)
+        build = [os.path.join(base_path, path)]
+
+        if self.vc_ver >= 15.0:
+            # Add Roslyn C# & Visual Basic Compiler
+            build += [os.path.join(base_path, path, 'Roslyn')]
+
+        return build
+
+    @property
+    def HTMLHelpWorkshop(self):
+        """
+        Microsoft HTML Help Workshop
+        """
+        if self.vc_ver < 11.0:
+            return []
+
+        return [os.path.join(self.si.ProgramFilesx86, 'HTML Help Workshop')]
+
+    @property
+    def UCRTLibraries(self):
+        """
+        Microsoft Universal C Runtime SDK Libraries
+        """
+        if self.vc_ver < 14.0:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        lib = os.path.join(self.si.UniversalCRTSdkDir, 'lib')
+        ucrtver = self._ucrt_subdir
+        return [os.path.join(lib, '%sucrt%s' % (ucrtver, arch_subdir))]
+
+    @property
+    def UCRTIncludes(self):
+        """
+        Microsoft Universal C Runtime SDK Include
+        """
+        if self.vc_ver < 14.0:
+            return []
+
+        include = os.path.join(self.si.UniversalCRTSdkDir, 'include')
+        return [os.path.join(include, '%sucrt' % self._ucrt_subdir)]
+
+    @property
+    def _ucrt_subdir(self):
+        """
+        Microsoft Universal C Runtime SDK version subdir
+        """
+        ucrtver = self.si.UniversalCRTSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def FSharp(self):
+        """
+        Microsoft Visual F#
+        """
+        if self.vc_ver < 11.0 and self.vc_ver > 12.0:
+            return []
+
+        return self.si.FSharpInstallDir
+
+    @property
+    def VCRuntimeRedist(self):
+        """
+        Microsoft Visual C++ runtime redistribuable dll
+        """
+        arch_subdir = self.pi.target_dir(x64=True)
+        if self.vc_ver < 15:
+            redist_path = self.si.VCInstallDir
+            vcruntime = 'redist%s\\Microsoft.VC%d0.CRT\\vcruntime%d0.dll'
+        else:
+            redist_path = self.si.VCInstallDir.replace('\\Tools', '\\Redist')
+            vcruntime = 'onecore%s\\Microsoft.VC%d0.CRT\\vcruntime%d0.dll'
+
+        # Visual Studio 2017  is still Visual C++ 14.0
+        dll_ver = 14.0 if self.vc_ver == 15 else self.vc_ver
+
+        vcruntime = vcruntime % (arch_subdir, self.vc_ver, dll_ver)
+        return os.path.join(redist_path, vcruntime)
+
+    def return_env(self, exists=True):
+        """
+        Return environment dict.
+
+        Parameters
+        ----------
+        exists: bool
+            It True, only return existing paths.
+        """
+        env = dict(
+            include=self._build_paths('include',
+                                      [self.VCIncludes,
+                                       self.OSIncludes,
+                                       self.UCRTIncludes,
+                                       self.NetFxSDKIncludes],
+                                      exists),
+            lib=self._build_paths('lib',
+                                  [self.VCLibraries,
+                                   self.OSLibraries,
+                                   self.FxTools,
+                                   self.UCRTLibraries,
+                                   self.NetFxSDKLibraries],
+                                  exists),
+            libpath=self._build_paths('libpath',
+                                      [self.VCLibraries,
+                                       self.FxTools,
+                                       self.VCStoreRefs,
+                                       self.OSLibpath],
+                                      exists),
+            path=self._build_paths('path',
+                                   [self.VCTools,
+                                    self.VSTools,
+                                    self.VsTDb,
+                                    self.SdkTools,
+                                    self.SdkSetup,
+                                    self.FxTools,
+                                    self.MSBuild,
+                                    self.HTMLHelpWorkshop,
+                                    self.FSharp],
+                                   exists),
+        )
+        if self.vc_ver >= 14 and os.path.isfile(self.VCRuntimeRedist):
+            env['py_vcruntime_redist'] = self.VCRuntimeRedist
+        return env
+
+    def _build_paths(self, name, spec_path_lists, exists):
+        """
+        Given an environment variable name and specified paths,
+        return a pathsep-separated string of paths containing
+        unique, extant, directories from those paths and from
+        the environment variable. Raise an error if no paths
+        are resolved.
+        """
+        # flatten spec_path_lists
+        spec_paths = itertools.chain.from_iterable(spec_path_lists)
+        env_paths = safe_env.get(name, '').split(os.pathsep)
+        paths = itertools.chain(spec_paths, env_paths)
+        extant_paths = list(filter(os.path.isdir, paths)) if exists else paths
+        if not extant_paths:
+            msg = "%s environment variable is empty" % name.upper()
+            raise distutils.errors.DistutilsPlatformError(msg)
+        unique_paths = self._unique_everseen(extant_paths)
+        return os.pathsep.join(unique_paths)
+
+    # from Python docs
+    def _unique_everseen(self, iterable, key=None):
+        """
+        List unique elements, preserving order.
+        Remember all elements ever seen.
+
+        _unique_everseen('AAAABBBCCDAABBB') --> A B C D
+
+        _unique_everseen('ABBCcAD', str.lower) --> A B C D
+        """
+        seen = set()
+        seen_add = seen.add
+        if key is None:
+            for element in filterfalse(seen.__contains__, iterable):
+                seen_add(element)
+                yield element
+        else:
+            for element in iterable:
+                k = key(element)
+                if k not in seen:
+                    seen_add(k)
+                    yield element
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/namespaces.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/namespaces.py
new file mode 100644
index 00000000..dc16106d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/namespaces.py
@@ -0,0 +1,107 @@
+import os
+from distutils import log
+import itertools
+
+from setuptools.extern.six.moves import map
+
+
+flatten = itertools.chain.from_iterable
+
+
+class Installer:
+
+    nspkg_ext = '-nspkg.pth'
+
+    def install_namespaces(self):
+        nsp = self._get_all_ns_packages()
+        if not nsp:
+            return
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        self.outputs.append(filename)
+        log.info("Installing %s", filename)
+        lines = map(self._gen_nspkg_line, nsp)
+
+        if self.dry_run:
+            # always generate the lines, even in dry run
+            list(lines)
+            return
+
+        with open(filename, 'wt') as f:
+            f.writelines(lines)
+
+    def uninstall_namespaces(self):
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        if not os.path.exists(filename):
+            return
+        log.info("Removing %s", filename)
+        os.remove(filename)
+
+    def _get_target(self):
+        return self.target
+
+    _nspkg_tmpl = (
+        "import sys, types, os",
+        "has_mfs = sys.version_info > (3, 5)",
+        "p = os.path.join(%(root)s, *%(pth)r)",
+        "importlib = has_mfs and __import__('importlib.util')",
+        "has_mfs and __import__('importlib.machinery')",
+        "m = has_mfs and "
+            "sys.modules.setdefault(%(pkg)r, "
+                "importlib.util.module_from_spec("
+                    "importlib.machinery.PathFinder.find_spec(%(pkg)r, "
+                        "[os.path.dirname(p)])))",
+        "m = m or "
+            "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))",
+        "mp = (m or []) and m.__dict__.setdefault('__path__',[])",
+        "(p not in mp) and mp.append(p)",
+    )
+    "lines for the namespace installer"
+
+    _nspkg_tmpl_multi = (
+        'm and setattr(sys.modules[%(parent)r], %(child)r, m)',
+    )
+    "additional line(s) when a parent package is indicated"
+
+    def _get_root(self):
+        return "sys._getframe(1).f_locals['sitedir']"
+
+    def _gen_nspkg_line(self, pkg):
+        # ensure pkg is not a unicode string under Python 2.7
+        pkg = str(pkg)
+        pth = tuple(pkg.split('.'))
+        root = self._get_root()
+        tmpl_lines = self._nspkg_tmpl
+        parent, sep, child = pkg.rpartition('.')
+        if parent:
+            tmpl_lines += self._nspkg_tmpl_multi
+        return ';'.join(tmpl_lines) % locals() + '\n'
+
+    def _get_all_ns_packages(self):
+        """Return sorted list of all package namespaces"""
+        pkgs = self.distribution.namespace_packages or []
+        return sorted(flatten(map(self._pkg_names, pkgs)))
+
+    @staticmethod
+    def _pkg_names(pkg):
+        """
+        Given a namespace package, yield the components of that
+        package.
+
+        >>> names = Installer._pkg_names('a.b.c')
+        >>> set(names) == set(['a', 'a.b', 'a.b.c'])
+        True
+        """
+        parts = pkg.split('.')
+        while parts:
+            yield '.'.join(parts)
+            parts.pop()
+
+
+class DevelopInstaller(Installer):
+    def _get_root(self):
+        return repr(str(self.egg_path))
+
+    def _get_target(self):
+        return self.egg_link
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/package_index.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/package_index.py
new file mode 100644
index 00000000..6b06f2ca
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/package_index.py
@@ -0,0 +1,1136 @@
+"""PyPI and direct package downloading"""
+import sys
+import os
+import re
+import shutil
+import socket
+import base64
+import hashlib
+import itertools
+import warnings
+from functools import wraps
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import urllib, http_client, configparser, map
+
+import setuptools
+from pkg_resources import (
+    CHECKOUT_DIST, Distribution, BINARY_DIST, normalize_path, SOURCE_DIST,
+    Environment, find_distributions, safe_name, safe_version,
+    to_filename, Requirement, DEVELOP_DIST, EGG_DIST,
+)
+from setuptools import ssl_support
+from distutils import log
+from distutils.errors import DistutilsError
+from fnmatch import translate
+from setuptools.py27compat import get_all_headers
+from setuptools.py33compat import unescape
+from setuptools.wheel import Wheel
+
+__metaclass__ = type
+
+EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.+!]+)$')
+HREF = re.compile(r"""href\s*=\s*['"]?([^'"> ]+)""", re.I)
+PYPI_MD5 = re.compile(
+    r'<a href="([^"#]+)">([^<]+)</a>\n\s+\(<a (?:title="MD5 hash"\n\s+)'
+    r'href="[^?]+\?:action=show_md5&amp;digest=([0-9a-f]{32})">md5</a>\)'
+)
+URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):', re.I).match
+EXTENSIONS = ".tar.gz .tar.bz2 .tar .zip .tgz".split()
+
+__all__ = [
+    'PackageIndex', 'distros_for_url', 'parse_bdist_wininst',
+    'interpret_distro_name',
+]
+
+_SOCKET_TIMEOUT = 15
+
+_tmpl = "setuptools/{setuptools.__version__} Python-urllib/{py_major}"
+user_agent = _tmpl.format(py_major=sys.version[:3], setuptools=setuptools)
+
+
+def parse_requirement_arg(spec):
+    try:
+        return Requirement.parse(spec)
+    except ValueError:
+        raise DistutilsError(
+            "Not a URL, existing file, or requirement spec: %r" % (spec,)
+        )
+
+
+def parse_bdist_wininst(name):
+    """Return (base,pyversion) or (None,None) for possible .exe name"""
+
+    lower = name.lower()
+    base, py_ver, plat = None, None, None
+
+    if lower.endswith('.exe'):
+        if lower.endswith('.win32.exe'):
+            base = name[:-10]
+            plat = 'win32'
+        elif lower.startswith('.win32-py', -16):
+            py_ver = name[-7:-4]
+            base = name[:-16]
+            plat = 'win32'
+        elif lower.endswith('.win-amd64.exe'):
+            base = name[:-14]
+            plat = 'win-amd64'
+        elif lower.startswith('.win-amd64-py', -20):
+            py_ver = name[-7:-4]
+            base = name[:-20]
+            plat = 'win-amd64'
+    return base, py_ver, plat
+
+
+def egg_info_for_url(url):
+    parts = urllib.parse.urlparse(url)
+    scheme, server, path, parameters, query, fragment = parts
+    base = urllib.parse.unquote(path.split('/')[-1])
+    if server == 'sourceforge.net' and base == 'download':  # XXX Yuck
+        base = urllib.parse.unquote(path.split('/')[-2])
+    if '#' in base:
+        base, fragment = base.split('#', 1)
+    return base, fragment
+
+
+def distros_for_url(url, metadata=None):
+    """Yield egg or source distribution objects that might be found at a URL"""
+    base, fragment = egg_info_for_url(url)
+    for dist in distros_for_location(url, base, metadata):
+        yield dist
+    if fragment:
+        match = EGG_FRAGMENT.match(fragment)
+        if match:
+            for dist in interpret_distro_name(
+                url, match.group(1), metadata, precedence=CHECKOUT_DIST
+            ):
+                yield dist
+
+
+def distros_for_location(location, basename, metadata=None):
+    """Yield egg or source distribution objects based on basename"""
+    if basename.endswith('.egg.zip'):
+        basename = basename[:-4]  # strip the .zip
+    if basename.endswith('.egg') and '-' in basename:
+        # only one, unambiguous interpretation
+        return [Distribution.from_location(location, basename, metadata)]
+    if basename.endswith('.whl') and '-' in basename:
+        wheel = Wheel(basename)
+        if not wheel.is_compatible():
+            return []
+        return [Distribution(
+            location=location,
+            project_name=wheel.project_name,
+            version=wheel.version,
+            # Increase priority over eggs.
+            precedence=EGG_DIST + 1,
+        )]
+    if basename.endswith('.exe'):
+        win_base, py_ver, platform = parse_bdist_wininst(basename)
+        if win_base is not None:
+            return interpret_distro_name(
+                location, win_base, metadata, py_ver, BINARY_DIST, platform
+            )
+    # Try source distro extensions (.zip, .tgz, etc.)
+    #
+    for ext in EXTENSIONS:
+        if basename.endswith(ext):
+            basename = basename[:-len(ext)]
+            return interpret_distro_name(location, basename, metadata)
+    return []  # no extension matched
+
+
+def distros_for_filename(filename, metadata=None):
+    """Yield possible egg or source distribution objects based on a filename"""
+    return distros_for_location(
+        normalize_path(filename), os.path.basename(filename), metadata
+    )
+
+
+def interpret_distro_name(
+        location, basename, metadata, py_version=None, precedence=SOURCE_DIST,
+        platform=None
+):
+    """Generate alternative interpretations of a source distro name
+
+    Note: if `location` is a filesystem filename, you should call
+    ``pkg_resources.normalize_path()`` on it before passing it to this
+    routine!
+    """
+    # Generate alternative interpretations of a source distro name
+    # Because some packages are ambiguous as to name/versions split
+    # e.g. "adns-python-1.1.0", "egenix-mx-commercial", etc.
+    # So, we generate each possible interepretation (e.g. "adns, python-1.1.0"
+    # "adns-python, 1.1.0", and "adns-python-1.1.0, no version").  In practice,
+    # the spurious interpretations should be ignored, because in the event
+    # there's also an "adns" package, the spurious "python-1.1.0" version will
+    # compare lower than any numeric version number, and is therefore unlikely
+    # to match a request for it.  It's still a potential problem, though, and
+    # in the long run PyPI and the distutils should go for "safe" names and
+    # versions in distribution archive names (sdist and bdist).
+
+    parts = basename.split('-')
+    if not py_version and any(re.match(r'py\d\.\d$', p) for p in parts[2:]):
+        # it is a bdist_dumb, not an sdist -- bail out
+        return
+
+    for p in range(1, len(parts) + 1):
+        yield Distribution(
+            location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]),
+            py_version=py_version, precedence=precedence,
+            platform=platform
+        )
+
+
+# From Python 2.7 docs
+def unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in six.moves.filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def unique_values(func):
+    """
+    Wrap a function returning an iterable such that the resulting iterable
+    only ever yields unique items.
+    """
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        return unique_everseen(func(*args, **kwargs))
+
+    return wrapper
+
+
+REL = re.compile(r"""<([^>]*\srel\s*=\s*['"]?([^'">]+)[^>]*)>""", re.I)
+# this line is here to fix emacs' cruddy broken syntax highlighting
+
+
+@unique_values
+def find_external_links(url, page):
+    """Find rel="homepage" and rel="download" links in `page`, yielding URLs"""
+
+    for match in REL.finditer(page):
+        tag, rel = match.groups()
+        rels = set(map(str.strip, rel.lower().split(',')))
+        if 'homepage' in rels or 'download' in rels:
+            for match in HREF.finditer(tag):
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+    for tag in ("<th>Home Page", "<th>Download URL"):
+        pos = page.find(tag)
+        if pos != -1:
+            match = HREF.search(page, pos)
+            if match:
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+
+class ContentChecker:
+    """
+    A null content checker that defines the interface for checking content
+    """
+
+    def feed(self, block):
+        """
+        Feed a block of data to the hash.
+        """
+        return
+
+    def is_valid(self):
+        """
+        Check the hash. Return False if validation fails.
+        """
+        return True
+
+    def report(self, reporter, template):
+        """
+        Call reporter with information about the checker (hash name)
+        substituted into the template.
+        """
+        return
+
+
+class HashChecker(ContentChecker):
+    pattern = re.compile(
+        r'(?P<hash_name>sha1|sha224|sha384|sha256|sha512|md5)='
+        r'(?P<expected>[a-f0-9]+)'
+    )
+
+    def __init__(self, hash_name, expected):
+        self.hash_name = hash_name
+        self.hash = hashlib.new(hash_name)
+        self.expected = expected
+
+    @classmethod
+    def from_url(cls, url):
+        "Construct a (possibly null) ContentChecker from a URL"
+        fragment = urllib.parse.urlparse(url)[-1]
+        if not fragment:
+            return ContentChecker()
+        match = cls.pattern.search(fragment)
+        if not match:
+            return ContentChecker()
+        return cls(**match.groupdict())
+
+    def feed(self, block):
+        self.hash.update(block)
+
+    def is_valid(self):
+        return self.hash.hexdigest() == self.expected
+
+    def report(self, reporter, template):
+        msg = template % self.hash_name
+        return reporter(msg)
+
+
+class PackageIndex(Environment):
+    """A distribution index that scans web pages for download URLs"""
+
+    def __init__(
+            self, index_url="https://pypi.org/simple/", hosts=('*',),
+            ca_bundle=None, verify_ssl=True, *args, **kw
+    ):
+        Environment.__init__(self, *args, **kw)
+        self.index_url = index_url + "/" [:not index_url.endswith('/')]
+        self.scanned_urls = {}
+        self.fetched_urls = {}
+        self.package_pages = {}
+        self.allows = re.compile('|'.join(map(translate, hosts))).match
+        self.to_scan = []
+        use_ssl = (
+            verify_ssl
+            and ssl_support.is_available
+            and (ca_bundle or ssl_support.find_ca_bundle())
+        )
+        if use_ssl:
+            self.opener = ssl_support.opener_for(ca_bundle)
+        else:
+            self.opener = urllib.request.urlopen
+
+    def process_url(self, url, retrieve=False):
+        """Evaluate a URL as a possible download, and maybe retrieve it"""
+        if url in self.scanned_urls and not retrieve:
+            return
+        self.scanned_urls[url] = True
+        if not URL_SCHEME(url):
+            self.process_filename(url)
+            return
+        else:
+            dists = list(distros_for_url(url))
+            if dists:
+                if not self.url_ok(url):
+                    return
+                self.debug("Found link: %s", url)
+
+        if dists or not retrieve or url in self.fetched_urls:
+            list(map(self.add, dists))
+            return  # don't need the actual page
+
+        if not self.url_ok(url):
+            self.fetched_urls[url] = True
+            return
+
+        self.info("Reading %s", url)
+        self.fetched_urls[url] = True  # prevent multiple fetch attempts
+        tmpl = "Download error on %s: %%s -- Some packages may not be found!"
+        f = self.open_url(url, tmpl % url)
+        if f is None:
+            return
+        self.fetched_urls[f.url] = True
+        if 'html' not in f.headers.get('content-type', '').lower():
+            f.close()  # not html, we can't process it
+            return
+
+        base = f.url  # handle redirects
+        page = f.read()
+        if not isinstance(page, str):
+            # In Python 3 and got bytes but want str.
+            if isinstance(f, urllib.error.HTTPError):
+                # Errors have no charset, assume latin1:
+                charset = 'latin-1'
+            else:
+                charset = f.headers.get_param('charset') or 'latin-1'
+            page = page.decode(charset, "ignore")
+        f.close()
+        for match in HREF.finditer(page):
+            link = urllib.parse.urljoin(base, htmldecode(match.group(1)))
+            self.process_url(link)
+        if url.startswith(self.index_url) and getattr(f, 'code', None) != 404:
+            page = self.process_index(url, page)
+
+    def process_filename(self, fn, nested=False):
+        # process filenames or directories
+        if not os.path.exists(fn):
+            self.warn("Not found: %s", fn)
+            return
+
+        if os.path.isdir(fn) and not nested:
+            path = os.path.realpath(fn)
+            for item in os.listdir(path):
+                self.process_filename(os.path.join(path, item), True)
+
+        dists = distros_for_filename(fn)
+        if dists:
+            self.debug("Found: %s", fn)
+            list(map(self.add, dists))
+
+    def url_ok(self, url, fatal=False):
+        s = URL_SCHEME(url)
+        is_file = s and s.group(1).lower() == 'file'
+        if is_file or self.allows(urllib.parse.urlparse(url)[1]):
+            return True
+        msg = (
+            "\nNote: Bypassing %s (disallowed host; see "
+            "http://bit.ly/2hrImnY for details).\n")
+        if fatal:
+            raise DistutilsError(msg % url)
+        else:
+            self.warn(msg, url)
+
+    def scan_egg_links(self, search_path):
+        dirs = filter(os.path.isdir, search_path)
+        egg_links = (
+            (path, entry)
+            for path in dirs
+            for entry in os.listdir(path)
+            if entry.endswith('.egg-link')
+        )
+        list(itertools.starmap(self.scan_egg_link, egg_links))
+
+    def scan_egg_link(self, path, entry):
+        with open(os.path.join(path, entry)) as raw_lines:
+            # filter non-empty lines
+            lines = list(filter(None, map(str.strip, raw_lines)))
+
+        if len(lines) != 2:
+            # format is not recognized; punt
+            return
+
+        egg_path, setup_path = lines
+
+        for dist in find_distributions(os.path.join(path, egg_path)):
+            dist.location = os.path.join(path, *lines)
+            dist.precedence = SOURCE_DIST
+            self.add(dist)
+
+    def process_index(self, url, page):
+        """Process the contents of a PyPI page"""
+
+        def scan(link):
+            # Process a URL to see if it's for a package page
+            if link.startswith(self.index_url):
+                parts = list(map(
+                    urllib.parse.unquote, link[len(self.index_url):].split('/')
+                ))
+                if len(parts) == 2 and '#' not in parts[1]:
+                    # it's a package page, sanitize and index it
+                    pkg = safe_name(parts[0])
+                    ver = safe_version(parts[1])
+                    self.package_pages.setdefault(pkg.lower(), {})[link] = True
+                    return to_filename(pkg), to_filename(ver)
+            return None, None
+
+        # process an index page into the package-page index
+        for match in HREF.finditer(page):
+            try:
+                scan(urllib.parse.urljoin(url, htmldecode(match.group(1))))
+            except ValueError:
+                pass
+
+        pkg, ver = scan(url)  # ensure this page is in the page index
+        if pkg:
+            # process individual package page
+            for new_url in find_external_links(url, page):
+                # Process the found URL
+                base, frag = egg_info_for_url(new_url)
+                if base.endswith('.py') and not frag:
+                    if ver:
+                        new_url += '#egg=%s-%s' % (pkg, ver)
+                    else:
+                        self.need_version_info(url)
+                self.scan_url(new_url)
+
+            return PYPI_MD5.sub(
+                lambda m: '<a href="%s#md5=%s">%s</a>' % m.group(1, 3, 2), page
+            )
+        else:
+            return ""  # no sense double-scanning non-package pages
+
+    def need_version_info(self, url):
+        self.scan_all(
+            "Page at %s links to .py file(s) without version info; an index "
+            "scan is required.", url
+        )
+
+    def scan_all(self, msg=None, *args):
+        if self.index_url not in self.fetched_urls:
+            if msg:
+                self.warn(msg, *args)
+            self.info(
+                "Scanning index of all packages (this may take a while)"
+            )
+        self.scan_url(self.index_url)
+
+    def find_packages(self, requirement):
+        self.scan_url(self.index_url + requirement.unsafe_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # Fall back to safe version of the name
+            self.scan_url(self.index_url + requirement.project_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # We couldn't find the target package, so search the index page too
+            self.not_found_in_index(requirement)
+
+        for url in list(self.package_pages.get(requirement.key, ())):
+            # scan each page that might be related to the desired package
+            self.scan_url(url)
+
+    def obtain(self, requirement, installer=None):
+        self.prescan()
+        self.find_packages(requirement)
+        for dist in self[requirement.key]:
+            if dist in requirement:
+                return dist
+            self.debug("%s does not match %s", requirement, dist)
+        return super(PackageIndex, self).obtain(requirement, installer)
+
+    def check_hash(self, checker, filename, tfp):
+        """
+        checker is a ContentChecker
+        """
+        checker.report(
+            self.debug,
+            "Validating %%s checksum for %s" % filename)
+        if not checker.is_valid():
+            tfp.close()
+            os.unlink(filename)
+            raise DistutilsError(
+                "%s validation failed for %s; "
+                "possible download problem?"
+                % (checker.hash.name, os.path.basename(filename))
+            )
+
+    def add_find_links(self, urls):
+        """Add `urls` to the list that will be prescanned for searches"""
+        for url in urls:
+            if (
+                self.to_scan is None  # if we have already "gone online"
+                or not URL_SCHEME(url)  # or it's a local file/directory
+                or url.startswith('file:')
+                or list(distros_for_url(url))  # or a direct package link
+            ):
+                # then go ahead and process it now
+                self.scan_url(url)
+            else:
+                # otherwise, defer retrieval till later
+                self.to_scan.append(url)
+
+    def prescan(self):
+        """Scan urls scheduled for prescanning (e.g. --find-links)"""
+        if self.to_scan:
+            list(map(self.scan_url, self.to_scan))
+        self.to_scan = None  # from now on, go ahead and process immediately
+
+    def not_found_in_index(self, requirement):
+        if self[requirement.key]:  # we've seen at least one distro
+            meth, msg = self.info, "Couldn't retrieve index page for %r"
+        else:  # no distros seen for this name, might be misspelled
+            meth, msg = (
+                self.warn,
+                "Couldn't find index page for %r (maybe misspelled?)")
+        meth(msg, requirement.unsafe_name)
+        self.scan_all()
+
+    def download(self, spec, tmpdir):
+        """Locate and/or download `spec` to `tmpdir`, returning a local path
+
+        `spec` may be a ``Requirement`` object, or a string containing a URL,
+        an existing local filename, or a project/version requirement spec
+        (i.e. the string form of a ``Requirement`` object).  If it is the URL
+        of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one
+        that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is
+        automatically created alongside the downloaded file.
+
+        If `spec` is a ``Requirement`` object or a string containing a
+        project/version requirement spec, this method returns the location of
+        a matching distribution (possibly after downloading it to `tmpdir`).
+        If `spec` is a locally existing file or directory name, it is simply
+        returned unchanged.  If `spec` is a URL, it is downloaded to a subpath
+        of `tmpdir`, and the local filename is returned.  Various errors may be
+        raised if a problem occurs during downloading.
+        """
+        if not isinstance(spec, Requirement):
+            scheme = URL_SCHEME(spec)
+            if scheme:
+                # It's a url, download it to tmpdir
+                found = self._download_url(scheme.group(1), spec, tmpdir)
+                base, fragment = egg_info_for_url(spec)
+                if base.endswith('.py'):
+                    found = self.gen_setup(found, fragment, tmpdir)
+                return found
+            elif os.path.exists(spec):
+                # Existing file or directory, just return it
+                return spec
+            else:
+                spec = parse_requirement_arg(spec)
+        return getattr(self.fetch_distribution(spec, tmpdir), 'location', None)
+
+    def fetch_distribution(
+            self, requirement, tmpdir, force_scan=False, source=False,
+            develop_ok=False, local_index=None):
+        """Obtain a distribution suitable for fulfilling `requirement`
+
+        `requirement` must be a ``pkg_resources.Requirement`` instance.
+        If necessary, or if the `force_scan` flag is set, the requirement is
+        searched for in the (online) package index as well as the locally
+        installed packages.  If a distribution matching `requirement` is found,
+        the returned distribution's ``location`` is the value you would have
+        gotten from calling the ``download()`` method with the matching
+        distribution's URL or filename.  If no matching distribution is found,
+        ``None`` is returned.
+
+        If the `source` flag is set, only source distributions and source
+        checkout links will be considered.  Unless the `develop_ok` flag is
+        set, development and system eggs (i.e., those using the ``.egg-info``
+        format) will be ignored.
+        """
+        # process a Requirement
+        self.info("Searching for %s", requirement)
+        skipped = {}
+        dist = None
+
+        def find(req, env=None):
+            if env is None:
+                env = self
+            # Find a matching distribution; may be called more than once
+
+            for dist in env[req.key]:
+
+                if dist.precedence == DEVELOP_DIST and not develop_ok:
+                    if dist not in skipped:
+                        self.warn(
+                            "Skipping development or system egg: %s", dist,
+                        )
+                        skipped[dist] = 1
+                    continue
+
+                test = (
+                    dist in req
+                    and (dist.precedence <= SOURCE_DIST or not source)
+                )
+                if test:
+                    loc = self.download(dist.location, tmpdir)
+                    dist.download_location = loc
+                    if os.path.exists(dist.download_location):
+                        return dist
+
+        if force_scan:
+            self.prescan()
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if not dist and local_index is not None:
+            dist = find(requirement, local_index)
+
+        if dist is None:
+            if self.to_scan is not None:
+                self.prescan()
+            dist = find(requirement)
+
+        if dist is None and not force_scan:
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if dist is None:
+            self.warn(
+                "No local packages or working download links found for %s%s",
+                (source and "a source distribution of " or ""),
+                requirement,
+            )
+        else:
+            self.info("Best match: %s", dist)
+            return dist.clone(location=dist.download_location)
+
+    def fetch(self, requirement, tmpdir, force_scan=False, source=False):
+        """Obtain a file suitable for fulfilling `requirement`
+
+        DEPRECATED; use the ``fetch_distribution()`` method now instead.  For
+        backward compatibility, this routine is identical but returns the
+        ``location`` of the downloaded distribution instead of a distribution
+        object.
+        """
+        dist = self.fetch_distribution(requirement, tmpdir, force_scan, source)
+        if dist is not None:
+            return dist.location
+        return None
+
+    def gen_setup(self, filename, fragment, tmpdir):
+        match = EGG_FRAGMENT.match(fragment)
+        dists = match and [
+            d for d in
+            interpret_distro_name(filename, match.group(1), None) if d.version
+        ] or []
+
+        if len(dists) == 1:  # unambiguous ``#egg`` fragment
+            basename = os.path.basename(filename)
+
+            # Make sure the file has been downloaded to the temp dir.
+            if os.path.dirname(filename) != tmpdir:
+                dst = os.path.join(tmpdir, basename)
+                from setuptools.command.easy_install import samefile
+                if not samefile(filename, dst):
+                    shutil.copy2(filename, dst)
+                    filename = dst
+
+            with open(os.path.join(tmpdir, 'setup.py'), 'w') as file:
+                file.write(
+                    "from setuptools import setup\n"
+                    "setup(name=%r, version=%r, py_modules=[%r])\n"
+                    % (
+                        dists[0].project_name, dists[0].version,
+                        os.path.splitext(basename)[0]
+                    )
+                )
+            return filename
+
+        elif match:
+            raise DistutilsError(
+                "Can't unambiguously interpret project/version identifier %r; "
+                "any dashes in the name or version should be escaped using "
+                "underscores. %r" % (fragment, dists)
+            )
+        else:
+            raise DistutilsError(
+                "Can't process plain .py files without an '#egg=name-version'"
+                " suffix to enable automatic setup script generation."
+            )
+
+    dl_blocksize = 8192
+
+    def _download_to(self, url, filename):
+        self.info("Downloading %s", url)
+        # Download the file
+        fp = None
+        try:
+            checker = HashChecker.from_url(url)
+            fp = self.open_url(url)
+            if isinstance(fp, urllib.error.HTTPError):
+                raise DistutilsError(
+                    "Can't download %s: %s %s" % (url, fp.code, fp.msg)
+                )
+            headers = fp.info()
+            blocknum = 0
+            bs = self.dl_blocksize
+            size = -1
+            if "content-length" in headers:
+                # Some servers return multiple Content-Length headers :(
+                sizes = get_all_headers(headers, 'Content-Length')
+                size = max(map(int, sizes))
+                self.reporthook(url, filename, blocknum, bs, size)
+            with open(filename, 'wb') as tfp:
+                while True:
+                    block = fp.read(bs)
+                    if block:
+                        checker.feed(block)
+                        tfp.write(block)
+                        blocknum += 1
+                        self.reporthook(url, filename, blocknum, bs, size)
+                    else:
+                        break
+                self.check_hash(checker, filename, tfp)
+            return headers
+        finally:
+            if fp:
+                fp.close()
+
+    def reporthook(self, url, filename, blocknum, blksize, size):
+        pass  # no-op
+
+    def open_url(self, url, warning=None):
+        if url.startswith('file:'):
+            return local_open(url)
+        try:
+            return open_with_auth(url, self.opener)
+        except (ValueError, http_client.InvalidURL) as v:
+            msg = ' '.join([str(arg) for arg in v.args])
+            if warning:
+                self.warn(warning, msg)
+            else:
+                raise DistutilsError('%s %s' % (url, msg))
+        except urllib.error.HTTPError as v:
+            return v
+        except urllib.error.URLError as v:
+            if warning:
+                self.warn(warning, v.reason)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v.reason))
+        except http_client.BadStatusLine as v:
+            if warning:
+                self.warn(warning, v.line)
+            else:
+                raise DistutilsError(
+                    '%s returned a bad status line. The server might be '
+                    'down, %s' %
+                    (url, v.line)
+                )
+        except (http_client.HTTPException, socket.error) as v:
+            if warning:
+                self.warn(warning, v)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v))
+
+    def _download_url(self, scheme, url, tmpdir):
+        # Determine download filename
+        #
+        name, fragment = egg_info_for_url(url)
+        if name:
+            while '..' in name:
+                name = name.replace('..', '.').replace('\\', '_')
+        else:
+            name = "__downloaded__"  # default if URL has no path contents
+
+        if name.endswith('.egg.zip'):
+            name = name[:-4]  # strip the extra .zip before download
+
+        filename = os.path.join(tmpdir, name)
+
+        # Download the file
+        #
+        if scheme == 'svn' or scheme.startswith('svn+'):
+            return self._download_svn(url, filename)
+        elif scheme == 'git' or scheme.startswith('git+'):
+            return self._download_git(url, filename)
+        elif scheme.startswith('hg+'):
+            return self._download_hg(url, filename)
+        elif scheme == 'file':
+            return urllib.request.url2pathname(urllib.parse.urlparse(url)[2])
+        else:
+            self.url_ok(url, True)  # raises error if not allowed
+            return self._attempt_download(url, filename)
+
+    def scan_url(self, url):
+        self.process_url(url, True)
+
+    def _attempt_download(self, url, filename):
+        headers = self._download_to(url, filename)
+        if 'html' in headers.get('content-type', '').lower():
+            return self._download_html(url, headers, filename)
+        else:
+            return filename
+
+    def _download_html(self, url, headers, filename):
+        file = open(filename)
+        for line in file:
+            if line.strip():
+                # Check for a subversion index page
+                if re.search(r'<title>([^- ]+ - )?Revision \d+:', line):
+                    # it's a subversion index page:
+                    file.close()
+                    os.unlink(filename)
+                    return self._download_svn(url, filename)
+                break  # not an index page
+        file.close()
+        os.unlink(filename)
+        raise DistutilsError("Unexpected HTML page found at " + url)
+
+    def _download_svn(self, url, filename):
+        warnings.warn("SVN download support is deprecated", UserWarning)
+        url = url.split('#', 1)[0]  # remove any fragment for svn's sake
+        creds = ''
+        if url.lower().startswith('svn:') and '@' in url:
+            scheme, netloc, path, p, q, f = urllib.parse.urlparse(url)
+            if not netloc and path.startswith('//') and '/' in path[2:]:
+                netloc, path = path[2:].split('/', 1)
+                auth, host = _splituser(netloc)
+                if auth:
+                    if ':' in auth:
+                        user, pw = auth.split(':', 1)
+                        creds = " --username=%s --password=%s" % (user, pw)
+                    else:
+                        creds = " --username=" + auth
+                    netloc = host
+                    parts = scheme, netloc, url, p, q, f
+                    url = urllib.parse.urlunparse(parts)
+        self.info("Doing subversion checkout from %s to %s", url, filename)
+        os.system("svn checkout%s -q %s %s" % (creds, url, filename))
+        return filename
+
+    @staticmethod
+    def _vcs_split_rev_from_url(url, pop_prefix=False):
+        scheme, netloc, path, query, frag = urllib.parse.urlsplit(url)
+
+        scheme = scheme.split('+', 1)[-1]
+
+        # Some fragment identification fails
+        path = path.split('#', 1)[0]
+
+        rev = None
+        if '@' in path:
+            path, rev = path.rsplit('@', 1)
+
+        # Also, discard fragment
+        url = urllib.parse.urlunsplit((scheme, netloc, path, query, ''))
+
+        return url, rev
+
+    def _download_git(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing git clone from %s to %s", url, filename)
+        os.system("git clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Checking out %s", rev)
+            os.system("git -C %s checkout --quiet %s" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def _download_hg(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing hg clone from %s to %s", url, filename)
+        os.system("hg clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Updating to %s", rev)
+            os.system("hg --cwd %s up -C -r %s -q" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def debug(self, msg, *args):
+        log.debug(msg, *args)
+
+    def info(self, msg, *args):
+        log.info(msg, *args)
+
+    def warn(self, msg, *args):
+        log.warn(msg, *args)
+
+
+# This pattern matches a character entity reference (a decimal numeric
+# references, a hexadecimal numeric reference, or a named reference).
+entity_sub = re.compile(r'&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?').sub
+
+
+def decode_entity(match):
+    what = match.group(0)
+    return unescape(what)
+
+
+def htmldecode(text):
+    """
+    Decode HTML entities in the given text.
+
+    >>> htmldecode(
+    ...     'https://../package_name-0.1.2.tar.gz'
+    ...     '?tokena=A&amp;tokenb=B">package_name-0.1.2.tar.gz')
+    'https://../package_name-0.1.2.tar.gz?tokena=A&tokenb=B">package_name-0.1.2.tar.gz'
+    """
+    return entity_sub(decode_entity, text)
+
+
+def socket_timeout(timeout=15):
+    def _socket_timeout(func):
+        def _socket_timeout(*args, **kwargs):
+            old_timeout = socket.getdefaulttimeout()
+            socket.setdefaulttimeout(timeout)
+            try:
+                return func(*args, **kwargs)
+            finally:
+                socket.setdefaulttimeout(old_timeout)
+
+        return _socket_timeout
+
+    return _socket_timeout
+
+
+def _encode_auth(auth):
+    """
+    A function compatible with Python 2.3-3.3 that will encode
+    auth from a URL suitable for an HTTP header.
+    >>> str(_encode_auth('username%3Apassword'))
+    'dXNlcm5hbWU6cGFzc3dvcmQ='
+
+    Long auth strings should not cause a newline to be inserted.
+    >>> long_auth = 'username:' + 'password'*10
+    >>> chr(10) in str(_encode_auth(long_auth))
+    False
+    """
+    auth_s = urllib.parse.unquote(auth)
+    # convert to bytes
+    auth_bytes = auth_s.encode()
+    encoded_bytes = base64.b64encode(auth_bytes)
+    # convert back to a string
+    encoded = encoded_bytes.decode()
+    # strip the trailing carriage return
+    return encoded.replace('\n', '')
+
+
+class Credential:
+    """
+    A username/password pair. Use like a namedtuple.
+    """
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __iter__(self):
+        yield self.username
+        yield self.password
+
+    def __str__(self):
+        return '%(username)s:%(password)s' % vars(self)
+
+
+class PyPIConfig(configparser.RawConfigParser):
+    def __init__(self):
+        """
+        Load from ~/.pypirc
+        """
+        defaults = dict.fromkeys(['username', 'password', 'repository'], '')
+        configparser.RawConfigParser.__init__(self, defaults)
+
+        rc = os.path.join(os.path.expanduser('~'), '.pypirc')
+        if os.path.exists(rc):
+            self.read(rc)
+
+    @property
+    def creds_by_repository(self):
+        sections_with_repositories = [
+            section for section in self.sections()
+            if self.get(section, 'repository').strip()
+        ]
+
+        return dict(map(self._get_repo_cred, sections_with_repositories))
+
+    def _get_repo_cred(self, section):
+        repo = self.get(section, 'repository').strip()
+        return repo, Credential(
+            self.get(section, 'username').strip(),
+            self.get(section, 'password').strip(),
+        )
+
+    def find_credential(self, url):
+        """
+        If the URL indicated appears to be a repository defined in this
+        config, return the credential for that repository.
+        """
+        for repository, cred in self.creds_by_repository.items():
+            if url.startswith(repository):
+                return cred
+
+
+def open_with_auth(url, opener=urllib.request.urlopen):
+    """Open a urllib2 request, handling HTTP authentication"""
+
+    parsed = urllib.parse.urlparse(url)
+    scheme, netloc, path, params, query, frag = parsed
+
+    # Double scheme does not raise on Mac OS X as revealed by a
+    # failing test. We would expect "nonnumeric port". Refs #20.
+    if netloc.endswith(':'):
+        raise http_client.InvalidURL("nonnumeric port: ''")
+
+    if scheme in ('http', 'https'):
+        auth, address = _splituser(netloc)
+    else:
+        auth = None
+
+    if not auth:
+        cred = PyPIConfig().find_credential(url)
+        if cred:
+            auth = str(cred)
+            info = cred.username, url
+            log.info('Authenticating as %s for %s (from .pypirc)', *info)
+
+    if auth:
+        auth = "Basic " + _encode_auth(auth)
+        parts = scheme, address, path, params, query, frag
+        new_url = urllib.parse.urlunparse(parts)
+        request = urllib.request.Request(new_url)
+        request.add_header("Authorization", auth)
+    else:
+        request = urllib.request.Request(url)
+
+    request.add_header('User-Agent', user_agent)
+    fp = opener(request)
+
+    if auth:
+        # Put authentication info back into request URL if same host,
+        # so that links found on the page will work
+        s2, h2, path2, param2, query2, frag2 = urllib.parse.urlparse(fp.url)
+        if s2 == scheme and h2 == address:
+            parts = s2, netloc, path2, param2, query2, frag2
+            fp.url = urllib.parse.urlunparse(parts)
+
+    return fp
+
+
+# copy of urllib.parse._splituser from Python 3.8
+def _splituser(host):
+    """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+    user, delim, host = host.rpartition('@')
+    return (user if delim else None), host
+
+
+# adding a timeout to avoid freezing package_index
+open_with_auth = socket_timeout(_SOCKET_TIMEOUT)(open_with_auth)
+
+
+def fix_sf_url(url):
+    return url  # backward compatibility
+
+
+def local_open(url):
+    """Read a local path, with special support for directories"""
+    scheme, server, path, param, query, frag = urllib.parse.urlparse(url)
+    filename = urllib.request.url2pathname(path)
+    if os.path.isfile(filename):
+        return urllib.request.urlopen(url)
+    elif path.endswith('/') and os.path.isdir(filename):
+        files = []
+        for f in os.listdir(filename):
+            filepath = os.path.join(filename, f)
+            if f == 'index.html':
+                with open(filepath, 'r') as fp:
+                    body = fp.read()
+                break
+            elif os.path.isdir(filepath):
+                f += '/'
+            files.append('<a href="{name}">{name}</a>'.format(name=f))
+        else:
+            tmpl = (
+                "<html><head><title>{url}</title>"
+                "</head><body>{files}</body></html>")
+            body = tmpl.format(url=url, files='\n'.join(files))
+        status, message = 200, "OK"
+    else:
+        status, message, body = 404, "Path not found", "Not found"
+
+    headers = {'content-type': 'text/html'}
+    body_stream = six.StringIO(body)
+    return urllib.error.HTTPError(url, status, message, headers, body_stream)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/pep425tags.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/pep425tags.py
new file mode 100644
index 00000000..48745a29
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/pep425tags.py
@@ -0,0 +1,319 @@
+# This file originally from pip:
+# https://github.com/pypa/pip/blob/8f4f15a5a95d7d5b511ceaee9ed261176c181970/src/pip/_internal/pep425tags.py
+"""Generate and work with PEP 425 Compatibility Tags."""
+from __future__ import absolute_import
+
+import distutils.util
+from distutils import log
+import platform
+import re
+import sys
+import sysconfig
+import warnings
+from collections import OrderedDict
+
+from .extern import six
+
+from . import glibc
+
+_osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
+
+
+def get_config_var(var):
+    try:
+        return sysconfig.get_config_var(var)
+    except IOError as e:  # Issue #1074
+        warnings.warn("{}".format(e), RuntimeWarning)
+        return None
+
+
+def get_abbr_impl():
+    """Return abbreviated implementation name."""
+    if hasattr(sys, 'pypy_version_info'):
+        pyimpl = 'pp'
+    elif sys.platform.startswith('java'):
+        pyimpl = 'jy'
+    elif sys.platform == 'cli':
+        pyimpl = 'ip'
+    else:
+        pyimpl = 'cp'
+    return pyimpl
+
+
+def get_impl_ver():
+    """Return implementation version."""
+    impl_ver = get_config_var("py_version_nodot")
+    if not impl_ver or get_abbr_impl() == 'pp':
+        impl_ver = ''.join(map(str, get_impl_version_info()))
+    return impl_ver
+
+
+def get_impl_version_info():
+    """Return sys.version_info-like tuple for use in decrementing the minor
+    version."""
+    if get_abbr_impl() == 'pp':
+        # as per https://github.com/pypa/pip/issues/2882
+        return (sys.version_info[0], sys.pypy_version_info.major,
+                sys.pypy_version_info.minor)
+    else:
+        return sys.version_info[0], sys.version_info[1]
+
+
+def get_impl_tag():
+    """
+    Returns the Tag for this specific implementation.
+    """
+    return "{}{}".format(get_abbr_impl(), get_impl_ver())
+
+
+def get_flag(var, fallback, expected=True, warn=True):
+    """Use a fallback method for determining SOABI flags if the needed config
+    var is unset or unavailable."""
+    val = get_config_var(var)
+    if val is None:
+        if warn:
+            log.debug("Config variable '%s' is unset, Python ABI tag may "
+                      "be incorrect", var)
+        return fallback()
+    return val == expected
+
+
+def get_abi_tag():
+    """Return the ABI tag based on SOABI (if available) or emulate SOABI
+    (CPython 2, PyPy)."""
+    soabi = get_config_var('SOABI')
+    impl = get_abbr_impl()
+    if not soabi and impl in {'cp', 'pp'} and hasattr(sys, 'maxunicode'):
+        d = ''
+        m = ''
+        u = ''
+        if get_flag('Py_DEBUG',
+                    lambda: hasattr(sys, 'gettotalrefcount'),
+                    warn=(impl == 'cp')):
+            d = 'd'
+        if get_flag('WITH_PYMALLOC',
+                    lambda: impl == 'cp',
+                    warn=(impl == 'cp')):
+            m = 'm'
+        if get_flag('Py_UNICODE_SIZE',
+                    lambda: sys.maxunicode == 0x10ffff,
+                    expected=4,
+                    warn=(impl == 'cp' and
+                          six.PY2)) \
+                and six.PY2:
+            u = 'u'
+        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
+    elif soabi and soabi.startswith('cpython-'):
+        abi = 'cp' + soabi.split('-')[1]
+    elif soabi:
+        abi = soabi.replace('.', '_').replace('-', '_')
+    else:
+        abi = None
+    return abi
+
+
+def _is_running_32bit():
+    return sys.maxsize == 2147483647
+
+
+def get_platform():
+    """Return our platform name 'win32', 'linux_x86_64'"""
+    if sys.platform == 'darwin':
+        # distutils.util.get_platform() returns the release based on the value
+        # of MACOSX_DEPLOYMENT_TARGET on which Python was built, which may
+        # be significantly older than the user's current machine.
+        release, _, machine = platform.mac_ver()
+        split_ver = release.split('.')
+
+        if machine == "x86_64" and _is_running_32bit():
+            machine = "i386"
+        elif machine == "ppc64" and _is_running_32bit():
+            machine = "ppc"
+
+        return 'macosx_{}_{}_{}'.format(split_ver[0], split_ver[1], machine)
+
+    # XXX remove distutils dependency
+    result = distutils.util.get_platform().replace('.', '_').replace('-', '_')
+    if result == "linux_x86_64" and _is_running_32bit():
+        # 32 bit Python program (running on a 64 bit Linux): pip should only
+        # install and run 32 bit compiled extensions in that case.
+        result = "linux_i686"
+
+    return result
+
+
+def is_manylinux1_compatible():
+    # Only Linux, and only x86-64 / i686
+    if get_platform() not in {"linux_x86_64", "linux_i686"}:
+        return False
+
+    # Check for presence of _manylinux module
+    try:
+        import _manylinux
+        return bool(_manylinux.manylinux1_compatible)
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below
+        pass
+
+    # Check glibc version. CentOS 5 uses glibc 2.5.
+    return glibc.have_compatible_glibc(2, 5)
+
+
+def get_darwin_arches(major, minor, machine):
+    """Return a list of supported arches (including group arches) for
+    the given major, minor and machine architecture of a macOS machine.
+    """
+    arches = []
+
+    def _supports_arch(major, minor, arch):
+        # Looking at the application support for macOS versions in the chart
+        # provided by https://en.wikipedia.org/wiki/OS_X#Versions it appears
+        # our timeline looks roughly like:
+        #
+        # 10.0 - Introduces ppc support.
+        # 10.4 - Introduces ppc64, i386, and x86_64 support, however the ppc64
+        #        and x86_64 support is CLI only, and cannot be used for GUI
+        #        applications.
+        # 10.5 - Extends ppc64 and x86_64 support to cover GUI applications.
+        # 10.6 - Drops support for ppc64
+        # 10.7 - Drops support for ppc
+        #
+        # Given that we do not know if we're installing a CLI or a GUI
+        # application, we must be conservative and assume it might be a GUI
+        # application and behave as if ppc64 and x86_64 support did not occur
+        # until 10.5.
+        #
+        # Note: The above information is taken from the "Application support"
+        #       column in the chart not the "Processor support" since I believe
+        #       that we care about what instruction sets an application can use
+        #       not which processors the OS supports.
+        if arch == 'ppc':
+            return (major, minor) <= (10, 5)
+        if arch == 'ppc64':
+            return (major, minor) == (10, 5)
+        if arch == 'i386':
+            return (major, minor) >= (10, 4)
+        if arch == 'x86_64':
+            return (major, minor) >= (10, 5)
+        if arch in groups:
+            for garch in groups[arch]:
+                if _supports_arch(major, minor, garch):
+                    return True
+        return False
+
+    groups = OrderedDict([
+        ("fat", ("i386", "ppc")),
+        ("intel", ("x86_64", "i386")),
+        ("fat64", ("x86_64", "ppc64")),
+        ("fat32", ("x86_64", "i386", "ppc")),
+    ])
+
+    if _supports_arch(major, minor, machine):
+        arches.append(machine)
+
+    for garch in groups:
+        if machine in groups[garch] and _supports_arch(major, minor, garch):
+            arches.append(garch)
+
+    arches.append('universal')
+
+    return arches
+
+
+def get_supported(versions=None, noarch=False, platform=None,
+                  impl=None, abi=None):
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param versions: a list of string versions, of the form ["33", "32"],
+        or None. The first version will be assumed to support our ABI.
+    :param platform: specify the exact platform you want valid
+        tags for, or None. If None, use the local system platform.
+    :param impl: specify the exact implementation you want valid
+        tags for, or None. If None, use the local interpreter impl.
+    :param abi: specify the exact abi you want valid
+        tags for, or None. If None, use the local interpreter abi.
+    """
+    supported = []
+
+    # Versions must be given with respect to the preference
+    if versions is None:
+        versions = []
+        version_info = get_impl_version_info()
+        major = version_info[:-1]
+        # Support all previous minor Python versions.
+        for minor in range(version_info[-1], -1, -1):
+            versions.append(''.join(map(str, major + (minor,))))
+
+    impl = impl or get_abbr_impl()
+
+    abis = []
+
+    abi = abi or get_abi_tag()
+    if abi:
+        abis[0:0] = [abi]
+
+    abi3s = set()
+    import imp
+    for suffix in imp.get_suffixes():
+        if suffix[0].startswith('.abi'):
+            abi3s.add(suffix[0].split('.', 2)[1])
+
+    abis.extend(sorted(list(abi3s)))
+
+    abis.append('none')
+
+    if not noarch:
+        arch = platform or get_platform()
+        if arch.startswith('macosx'):
+            # support macosx-10.6-intel on macosx-10.9-x86_64
+            match = _osx_arch_pat.match(arch)
+            if match:
+                name, major, minor, actual_arch = match.groups()
+                tpl = '{}_{}_%i_%s'.format(name, major)
+                arches = []
+                for m in reversed(range(int(minor) + 1)):
+                    for a in get_darwin_arches(int(major), m, actual_arch):
+                        arches.append(tpl % (m, a))
+            else:
+                # arch pattern didn't match (?!)
+                arches = [arch]
+        elif platform is None and is_manylinux1_compatible():
+            arches = [arch.replace('linux', 'manylinux1'), arch]
+        else:
+            arches = [arch]
+
+        # Current version, current API (built specifically for our Python):
+        for abi in abis:
+            for arch in arches:
+                supported.append(('%s%s' % (impl, versions[0]), abi, arch))
+
+        # abi3 modules compatible with older version of Python
+        for version in versions[1:]:
+            # abi3 was introduced in Python 3.2
+            if version in {'31', '30'}:
+                break
+            for abi in abi3s:   # empty set if not Python 3
+                for arch in arches:
+                    supported.append(("%s%s" % (impl, version), abi, arch))
+
+        # Has binaries, does not use the Python API:
+        for arch in arches:
+            supported.append(('py%s' % (versions[0][0]), 'none', arch))
+
+    # No abi / arch, but requires our implementation:
+    supported.append(('%s%s' % (impl, versions[0]), 'none', 'any'))
+    # Tagged specifically as being cross-version compatible
+    # (with just the major version specified)
+    supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
+
+    # No abi / arch, generic Python
+    for i, version in enumerate(versions):
+        supported.append(('py%s' % (version,), 'none', 'any'))
+        if i == 0:
+            supported.append(('py%s' % (version[0]), 'none', 'any'))
+
+    return supported
+
+
+implementation_tag = get_impl_tag()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py27compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py27compat.py
new file mode 100644
index 00000000..2985011b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py27compat.py
@@ -0,0 +1,28 @@
+"""
+Compatibility Support for Python 2.7 and earlier
+"""
+
+import platform
+
+from setuptools.extern import six
+
+
+def get_all_headers(message, key):
+    """
+    Given an HTTPMessage, return all headers matching a given key.
+    """
+    return message.get_all(key)
+
+
+if six.PY2:
+    def get_all_headers(message, key):
+        return message.getheaders(key)
+
+
+linux_py2_ascii = (
+    platform.system() == 'Linux' and
+    six.PY2
+)
+
+rmtree_safe = str if linux_py2_ascii else lambda x: x
+"""Workaround for http://bugs.python.org/issue24672"""
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py31compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py31compat.py
new file mode 100644
index 00000000..e1da7ee2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py31compat.py
@@ -0,0 +1,32 @@
+__all__ = []
+
+__metaclass__ = type
+
+
+try:
+    # Python >=3.2
+    from tempfile import TemporaryDirectory
+except ImportError:
+    import shutil
+    import tempfile
+
+    class TemporaryDirectory:
+        """
+        Very simple temporary directory context manager.
+        Will try to delete afterward, but will also ignore OS and similar
+        errors on deletion.
+        """
+
+        def __init__(self, **kwargs):
+            self.name = None  # Handle mkdtemp raising an exception
+            self.name = tempfile.mkdtemp(**kwargs)
+
+        def __enter__(self):
+            return self.name
+
+        def __exit__(self, exctype, excvalue, exctrace):
+            try:
+                shutil.rmtree(self.name, True)
+            except OSError:  # removal errors are not the only possible
+                pass
+            self.name = None
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py33compat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py33compat.py
new file mode 100644
index 00000000..87cf5398
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/py33compat.py
@@ -0,0 +1,55 @@
+import dis
+import array
+import collections
+
+try:
+    import html
+except ImportError:
+    html = None
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import html_parser
+
+__metaclass__ = type
+
+OpArg = collections.namedtuple('OpArg', 'opcode arg')
+
+
+class Bytecode_compat:
+    def __init__(self, code):
+        self.code = code
+
+    def __iter__(self):
+        """Yield '(op,arg)' pair for each operation in code object 'code'"""
+
+        bytes = array.array('b', self.code.co_code)
+        eof = len(self.code.co_code)
+
+        ptr = 0
+        extended_arg = 0
+
+        while ptr < eof:
+
+            op = bytes[ptr]
+
+            if op >= dis.HAVE_ARGUMENT:
+
+                arg = bytes[ptr + 1] + bytes[ptr + 2] * 256 + extended_arg
+                ptr += 3
+
+                if op == dis.EXTENDED_ARG:
+                    long_type = six.integer_types[-1]
+                    extended_arg = arg * long_type(65536)
+                    continue
+
+            else:
+                arg = None
+                ptr += 1
+
+            yield OpArg(op, arg)
+
+
+Bytecode = getattr(dis, 'Bytecode', Bytecode_compat)
+
+
+unescape = getattr(html, 'unescape', html_parser.HTMLParser().unescape)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/sandbox.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/sandbox.py
new file mode 100644
index 00000000..685f3f72
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/sandbox.py
@@ -0,0 +1,491 @@
+import os
+import sys
+import tempfile
+import operator
+import functools
+import itertools
+import re
+import contextlib
+import pickle
+import textwrap
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import builtins, map
+
+import pkg_resources.py31compat
+
+if sys.platform.startswith('java'):
+    import org.python.modules.posix.PosixModule as _os
+else:
+    _os = sys.modules[os.name]
+try:
+    _file = file
+except NameError:
+    _file = None
+_open = open
+from distutils.errors import DistutilsError
+from pkg_resources import working_set
+
+
+__all__ = [
+    "AbstractSandbox", "DirectorySandbox", "SandboxViolation", "run_setup",
+]
+
+
+def _execfile(filename, globals, locals=None):
+    """
+    Python 3 implementation of execfile.
+    """
+    mode = 'rb'
+    with open(filename, mode) as stream:
+        script = stream.read()
+    if locals is None:
+        locals = globals
+    code = compile(script, filename, 'exec')
+    exec(code, globals, locals)
+
+
+@contextlib.contextmanager
+def save_argv(repl=None):
+    saved = sys.argv[:]
+    if repl is not None:
+        sys.argv[:] = repl
+    try:
+        yield saved
+    finally:
+        sys.argv[:] = saved
+
+
+@contextlib.contextmanager
+def save_path():
+    saved = sys.path[:]
+    try:
+        yield saved
+    finally:
+        sys.path[:] = saved
+
+
+@contextlib.contextmanager
+def override_temp(replacement):
+    """
+    Monkey-patch tempfile.tempdir with replacement, ensuring it exists
+    """
+    pkg_resources.py31compat.makedirs(replacement, exist_ok=True)
+
+    saved = tempfile.tempdir
+
+    tempfile.tempdir = replacement
+
+    try:
+        yield
+    finally:
+        tempfile.tempdir = saved
+
+
+@contextlib.contextmanager
+def pushd(target):
+    saved = os.getcwd()
+    os.chdir(target)
+    try:
+        yield saved
+    finally:
+        os.chdir(saved)
+
+
+class UnpickleableException(Exception):
+    """
+    An exception representing another Exception that could not be pickled.
+    """
+
+    @staticmethod
+    def dump(type, exc):
+        """
+        Always return a dumped (pickled) type and exc. If exc can't be pickled,
+        wrap it in UnpickleableException first.
+        """
+        try:
+            return pickle.dumps(type), pickle.dumps(exc)
+        except Exception:
+            # get UnpickleableException inside the sandbox
+            from setuptools.sandbox import UnpickleableException as cls
+            return cls.dump(cls, cls(repr(exc)))
+
+
+class ExceptionSaver:
+    """
+    A Context Manager that will save an exception, serialized, and restore it
+    later.
+    """
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, type, exc, tb):
+        if not exc:
+            return
+
+        # dump the exception
+        self._saved = UnpickleableException.dump(type, exc)
+        self._tb = tb
+
+        # suppress the exception
+        return True
+
+    def resume(self):
+        "restore and re-raise any exception"
+
+        if '_saved' not in vars(self):
+            return
+
+        type, exc = map(pickle.loads, self._saved)
+        six.reraise(type, exc, self._tb)
+
+
+@contextlib.contextmanager
+def save_modules():
+    """
+    Context in which imported modules are saved.
+
+    Translates exceptions internal to the context into the equivalent exception
+    outside the context.
+    """
+    saved = sys.modules.copy()
+    with ExceptionSaver() as saved_exc:
+        yield saved
+
+    sys.modules.update(saved)
+    # remove any modules imported since
+    del_modules = (
+        mod_name for mod_name in sys.modules
+        if mod_name not in saved
+        # exclude any encodings modules. See #285
+        and not mod_name.startswith('encodings.')
+    )
+    _clear_modules(del_modules)
+
+    saved_exc.resume()
+
+
+def _clear_modules(module_names):
+    for mod_name in list(module_names):
+        del sys.modules[mod_name]
+
+
+@contextlib.contextmanager
+def save_pkg_resources_state():
+    saved = pkg_resources.__getstate__()
+    try:
+        yield saved
+    finally:
+        pkg_resources.__setstate__(saved)
+
+
+@contextlib.contextmanager
+def setup_context(setup_dir):
+    temp_dir = os.path.join(setup_dir, 'temp')
+    with save_pkg_resources_state():
+        with save_modules():
+            hide_setuptools()
+            with save_path():
+                with save_argv():
+                    with override_temp(temp_dir):
+                        with pushd(setup_dir):
+                            # ensure setuptools commands are available
+                            __import__('setuptools')
+                            yield
+
+
+def _needs_hiding(mod_name):
+    """
+    >>> _needs_hiding('setuptools')
+    True
+    >>> _needs_hiding('pkg_resources')
+    True
+    >>> _needs_hiding('setuptools_plugin')
+    False
+    >>> _needs_hiding('setuptools.__init__')
+    True
+    >>> _needs_hiding('distutils')
+    True
+    >>> _needs_hiding('os')
+    False
+    >>> _needs_hiding('Cython')
+    True
+    """
+    pattern = re.compile(r'(setuptools|pkg_resources|distutils|Cython)(\.|$)')
+    return bool(pattern.match(mod_name))
+
+
+def hide_setuptools():
+    """
+    Remove references to setuptools' modules from sys.modules to allow the
+    invocation to import the most appropriate setuptools. This technique is
+    necessary to avoid issues such as #315 where setuptools upgrading itself
+    would fail to find a function declared in the metadata.
+    """
+    modules = filter(_needs_hiding, sys.modules)
+    _clear_modules(modules)
+
+
+def run_setup(setup_script, args):
+    """Run a distutils setup script, sandboxed in its directory"""
+    setup_dir = os.path.abspath(os.path.dirname(setup_script))
+    with setup_context(setup_dir):
+        try:
+            sys.argv[:] = [setup_script] + list(args)
+            sys.path.insert(0, setup_dir)
+            # reset to include setup dir, w/clean callback list
+            working_set.__init__()
+            working_set.callbacks.append(lambda dist: dist.activate())
+
+            # __file__ should be a byte string on Python 2 (#712)
+            dunder_file = (
+                setup_script
+                if isinstance(setup_script, str) else
+                setup_script.encode(sys.getfilesystemencoding())
+            )
+
+            with DirectorySandbox(setup_dir):
+                ns = dict(__file__=dunder_file, __name__='__main__')
+                _execfile(setup_script, ns)
+        except SystemExit as v:
+            if v.args and v.args[0]:
+                raise
+            # Normal exit, just return
+
+
+class AbstractSandbox:
+    """Wrap 'os' module and 'open()' builtin for virtualizing setup scripts"""
+
+    _active = False
+
+    def __init__(self):
+        self._attrs = [
+            name for name in dir(_os)
+            if not name.startswith('_') and hasattr(self, name)
+        ]
+
+    def _copy(self, source):
+        for name in self._attrs:
+            setattr(os, name, getattr(source, name))
+
+    def __enter__(self):
+        self._copy(self)
+        if _file:
+            builtins.file = self._file
+        builtins.open = self._open
+        self._active = True
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self._active = False
+        if _file:
+            builtins.file = _file
+        builtins.open = _open
+        self._copy(_os)
+
+    def run(self, func):
+        """Run 'func' under os sandboxing"""
+        with self:
+            return func()
+
+    def _mk_dual_path_wrapper(name):
+        original = getattr(_os, name)
+
+        def wrap(self, src, dst, *args, **kw):
+            if self._active:
+                src, dst = self._remap_pair(name, src, dst, *args, **kw)
+            return original(src, dst, *args, **kw)
+
+        return wrap
+
+    for name in ["rename", "link", "symlink"]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_dual_path_wrapper(name)
+
+    def _mk_single_path_wrapper(name, original=None):
+        original = original or getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+            return original(path, *args, **kw)
+
+        return wrap
+
+    if _file:
+        _file = _mk_single_path_wrapper('file', _file)
+    _open = _mk_single_path_wrapper('open', _open)
+    for name in [
+        "stat", "listdir", "chdir", "open", "chmod", "chown", "mkdir",
+        "remove", "unlink", "rmdir", "utime", "lchown", "chroot", "lstat",
+        "startfile", "mkfifo", "mknod", "pathconf", "access"
+    ]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_path_wrapper(name)
+
+    def _mk_single_with_return(name):
+        original = getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+                return self._remap_output(name, original(path, *args, **kw))
+            return original(path, *args, **kw)
+
+        return wrap
+
+    for name in ['readlink', 'tempnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_with_return(name)
+
+    def _mk_query(name):
+        original = getattr(_os, name)
+
+        def wrap(self, *args, **kw):
+            retval = original(*args, **kw)
+            if self._active:
+                return self._remap_output(name, retval)
+            return retval
+
+        return wrap
+
+    for name in ['getcwd', 'tmpnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_query(name)
+
+    def _validate_path(self, path):
+        """Called to remap or validate any path, whether input or output"""
+        return path
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        return self._validate_path(path)
+
+    def _remap_output(self, operation, path):
+        """Called for path outputs"""
+        return self._validate_path(path)
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        return (
+            self._remap_input(operation + '-from', src, *args, **kw),
+            self._remap_input(operation + '-to', dst, *args, **kw)
+        )
+
+
+if hasattr(os, 'devnull'):
+    _EXCEPTIONS = [os.devnull,]
+else:
+    _EXCEPTIONS = []
+
+
+class DirectorySandbox(AbstractSandbox):
+    """Restrict operations to a single subdirectory - pseudo-chroot"""
+
+    write_ops = dict.fromkeys([
+        "open", "chmod", "chown", "mkdir", "remove", "unlink", "rmdir",
+        "utime", "lchown", "chroot", "mkfifo", "mknod", "tempnam",
+    ])
+
+    _exception_patterns = [
+        # Allow lib2to3 to attempt to save a pickled grammar object (#121)
+        r'.*lib2to3.*\.pickle$',
+    ]
+    "exempt writing to paths that match the pattern"
+
+    def __init__(self, sandbox, exceptions=_EXCEPTIONS):
+        self._sandbox = os.path.normcase(os.path.realpath(sandbox))
+        self._prefix = os.path.join(self._sandbox, '')
+        self._exceptions = [
+            os.path.normcase(os.path.realpath(path))
+            for path in exceptions
+        ]
+        AbstractSandbox.__init__(self)
+
+    def _violation(self, operation, *args, **kw):
+        from setuptools.sandbox import SandboxViolation
+        raise SandboxViolation(operation, args, kw)
+
+    if _file:
+
+        def _file(self, path, mode='r', *args, **kw):
+            if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+                self._violation("file", path, mode, *args, **kw)
+            return _file(path, mode, *args, **kw)
+
+    def _open(self, path, mode='r', *args, **kw):
+        if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+            self._violation("open", path, mode, *args, **kw)
+        return _open(path, mode, *args, **kw)
+
+    def tmpnam(self):
+        self._violation("tmpnam")
+
+    def _ok(self, path):
+        active = self._active
+        try:
+            self._active = False
+            realpath = os.path.normcase(os.path.realpath(path))
+            return (
+                self._exempted(realpath)
+                or realpath == self._sandbox
+                or realpath.startswith(self._prefix)
+            )
+        finally:
+            self._active = active
+
+    def _exempted(self, filepath):
+        start_matches = (
+            filepath.startswith(exception)
+            for exception in self._exceptions
+        )
+        pattern_matches = (
+            re.match(pattern, filepath)
+            for pattern in self._exception_patterns
+        )
+        candidates = itertools.chain(start_matches, pattern_matches)
+        return any(candidates)
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        if operation in self.write_ops and not self._ok(path):
+            self._violation(operation, os.path.realpath(path), *args, **kw)
+        return path
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        if not self._ok(src) or not self._ok(dst):
+            self._violation(operation, src, dst, *args, **kw)
+        return (src, dst)
+
+    def open(self, file, flags, mode=0o777, *args, **kw):
+        """Called for low-level os.open()"""
+        if flags & WRITE_FLAGS and not self._ok(file):
+            self._violation("os.open", file, flags, mode, *args, **kw)
+        return _os.open(file, flags, mode, *args, **kw)
+
+
+WRITE_FLAGS = functools.reduce(
+    operator.or_, [getattr(_os, a, 0) for a in
+        "O_WRONLY O_RDWR O_APPEND O_CREAT O_TRUNC O_TEMPORARY".split()]
+)
+
+
+class SandboxViolation(DistutilsError):
+    """A setup script attempted to modify the filesystem outside the sandbox"""
+
+    tmpl = textwrap.dedent("""
+        SandboxViolation: {cmd}{args!r} {kwargs}
+
+        The package setup script has attempted to modify files on your system
+        that are not within the EasyInstall build area, and has been aborted.
+
+        This package cannot be safely installed by EasyInstall, and may not
+        support alternate installation locations even if you run its setup
+        script by hand.  Please inform the package's author and the EasyInstall
+        maintainers to find out if a fix or workaround is available.
+        """).lstrip()
+
+    def __str__(self):
+        cmd, args, kwargs = self.args
+        return self.tmpl.format(**locals())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script (dev).tmpl b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script (dev).tmpl
new file mode 100644
index 00000000..39a24b04
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script (dev).tmpl
@@ -0,0 +1,6 @@
+# EASY-INSTALL-DEV-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').require(%(spec)r)
+__file__ = %(dev_path)r
+with open(__file__) as f:
+    exec(compile(f.read(), __file__, 'exec'))
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script.tmpl b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script.tmpl
new file mode 100644
index 00000000..ff5efbca
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/script.tmpl
@@ -0,0 +1,3 @@
+# EASY-INSTALL-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').run_script(%(spec)r, %(script_name)r)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/site-patch.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/site-patch.py
new file mode 100644
index 00000000..40b00de0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/site-patch.py
@@ -0,0 +1,74 @@
+def __boot():
+    import sys
+    import os
+    PYTHONPATH = os.environ.get('PYTHONPATH')
+    if PYTHONPATH is None or (sys.platform == 'win32' and not PYTHONPATH):
+        PYTHONPATH = []
+    else:
+        PYTHONPATH = PYTHONPATH.split(os.pathsep)
+
+    pic = getattr(sys, 'path_importer_cache', {})
+    stdpath = sys.path[len(PYTHONPATH):]
+    mydir = os.path.dirname(__file__)
+
+    for item in stdpath:
+        if item == mydir or not item:
+            continue  # skip if current dir. on Windows, or my own directory
+        importer = pic.get(item)
+        if importer is not None:
+            loader = importer.find_module('site')
+            if loader is not None:
+                # This should actually reload the current module
+                loader.load_module('site')
+                break
+        else:
+            try:
+                import imp  # Avoid import loop in Python 3
+                stream, path, descr = imp.find_module('site', [item])
+            except ImportError:
+                continue
+            if stream is None:
+                continue
+            try:
+                # This should actually reload the current module
+                imp.load_module('site', stream, path, descr)
+            finally:
+                stream.close()
+            break
+    else:
+        raise ImportError("Couldn't find the real 'site' module")
+
+    known_paths = dict([(makepath(item)[1], 1) for item in sys.path])  # 2.2 comp
+
+    oldpos = getattr(sys, '__egginsert', 0)  # save old insertion position
+    sys.__egginsert = 0  # and reset the current one
+
+    for item in PYTHONPATH:
+        addsitedir(item)
+
+    sys.__egginsert += oldpos  # restore effective old position
+
+    d, nd = makepath(stdpath[0])
+    insert_at = None
+    new_path = []
+
+    for item in sys.path:
+        p, np = makepath(item)
+
+        if np == nd and insert_at is None:
+            # We've hit the first 'system' path entry, so added entries go here
+            insert_at = len(new_path)
+
+        if np in known_paths or insert_at is None:
+            new_path.append(item)
+        else:
+            # new path after the insert point, back-insert it
+            new_path.insert(insert_at, item)
+            insert_at += 1
+
+    sys.path[:] = new_path
+
+
+if __name__ == 'site':
+    __boot()
+    del __boot
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/ssl_support.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/ssl_support.py
new file mode 100644
index 00000000..226db694
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/ssl_support.py
@@ -0,0 +1,260 @@
+import os
+import socket
+import atexit
+import re
+import functools
+
+from setuptools.extern.six.moves import urllib, http_client, map, filter
+
+from pkg_resources import ResolutionError, ExtractionError
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+__all__ = [
+    'VerifyingHTTPSHandler', 'find_ca_bundle', 'is_available', 'cert_paths',
+    'opener_for'
+]
+
+cert_paths = """
+/etc/pki/tls/certs/ca-bundle.crt
+/etc/ssl/certs/ca-certificates.crt
+/usr/share/ssl/certs/ca-bundle.crt
+/usr/local/share/certs/ca-root.crt
+/etc/ssl/cert.pem
+/System/Library/OpenSSL/certs/cert.pem
+/usr/local/share/certs/ca-root-nss.crt
+/etc/ssl/ca-bundle.pem
+""".strip().split()
+
+try:
+    HTTPSHandler = urllib.request.HTTPSHandler
+    HTTPSConnection = http_client.HTTPSConnection
+except AttributeError:
+    HTTPSHandler = HTTPSConnection = object
+
+is_available = ssl is not None and object not in (HTTPSHandler, HTTPSConnection)
+
+
+try:
+    from ssl import CertificateError, match_hostname
+except ImportError:
+    try:
+        from backports.ssl_match_hostname import CertificateError
+        from backports.ssl_match_hostname import match_hostname
+    except ImportError:
+        CertificateError = None
+        match_hostname = None
+
+if not CertificateError:
+
+    class CertificateError(ValueError):
+        pass
+
+
+if not match_hostname:
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        https://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        # Ported from python3-syntax:
+        # leftmost, *remainder = dn.split(r'.')
+        parts = dn.split(r'.')
+        leftmost = parts[0]
+        remainder = parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+class VerifyingHTTPSHandler(HTTPSHandler):
+    """Simple verifying handler: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, ca_bundle):
+        self.ca_bundle = ca_bundle
+        HTTPSHandler.__init__(self)
+
+    def https_open(self, req):
+        return self.do_open(
+            lambda host, **kw: VerifyingHTTPSConn(host, self.ca_bundle, **kw), req
+        )
+
+
+class VerifyingHTTPSConn(HTTPSConnection):
+    """Simple verifying connection: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, host, ca_bundle, **kw):
+        HTTPSConnection.__init__(self, host, **kw)
+        self.ca_bundle = ca_bundle
+
+    def connect(self):
+        sock = socket.create_connection(
+            (self.host, self.port), getattr(self, 'source_address', None)
+        )
+
+        # Handle the socket if a (proxy) tunnel is present
+        if hasattr(self, '_tunnel') and getattr(self, '_tunnel_host', None):
+            self.sock = sock
+            self._tunnel()
+            # http://bugs.python.org/issue7776: Python>=3.4.1 and >=2.7.7
+            # change self.host to mean the proxy server host when tunneling is
+            # being used. Adapt, since we are interested in the destination
+            # host for the match_hostname() comparison.
+            actual_host = self._tunnel_host
+        else:
+            actual_host = self.host
+
+        if hasattr(ssl, 'create_default_context'):
+            ctx = ssl.create_default_context(cafile=self.ca_bundle)
+            self.sock = ctx.wrap_socket(sock, server_hostname=actual_host)
+        else:
+            # This is for python < 2.7.9 and < 3.4?
+            self.sock = ssl.wrap_socket(
+                sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs=self.ca_bundle
+            )
+        try:
+            match_hostname(self.sock.getpeercert(), actual_host)
+        except CertificateError:
+            self.sock.shutdown(socket.SHUT_RDWR)
+            self.sock.close()
+            raise
+
+
+def opener_for(ca_bundle=None):
+    """Get a urlopen() replacement that uses ca_bundle for verification"""
+    return urllib.request.build_opener(
+        VerifyingHTTPSHandler(ca_bundle or find_ca_bundle())
+    ).open
+
+
+# from jaraco.functools
+def once(func):
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        if not hasattr(func, 'always_returns'):
+            func.always_returns = func(*args, **kwargs)
+        return func.always_returns
+    return wrapper
+
+
+@once
+def get_win_certfile():
+    try:
+        import wincertstore
+    except ImportError:
+        return None
+
+    class CertFile(wincertstore.CertFile):
+        def __init__(self):
+            super(CertFile, self).__init__()
+            atexit.register(self.close)
+
+        def close(self):
+            try:
+                super(CertFile, self).close()
+            except OSError:
+                pass
+
+    _wincerts = CertFile()
+    _wincerts.addstore('CA')
+    _wincerts.addstore('ROOT')
+    return _wincerts.name
+
+
+def find_ca_bundle():
+    """Return an existing CA bundle path, or None"""
+    extant_cert_paths = filter(os.path.isfile, cert_paths)
+    return (
+        get_win_certfile()
+        or next(extant_cert_paths, None)
+        or _certifi_where()
+    )
+
+
+def _certifi_where():
+    try:
+        return __import__('certifi').where()
+    except (ImportError, ResolutionError, ExtractionError):
+        pass
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/unicode_utils.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/unicode_utils.py
new file mode 100644
index 00000000..7c63efd2
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/unicode_utils.py
@@ -0,0 +1,44 @@
+import unicodedata
+import sys
+
+from setuptools.extern import six
+
+
+# HFS Plus uses decomposed UTF-8
+def decompose(path):
+    if isinstance(path, six.text_type):
+        return unicodedata.normalize('NFD', path)
+    try:
+        path = path.decode('utf-8')
+        path = unicodedata.normalize('NFD', path)
+        path = path.encode('utf-8')
+    except UnicodeError:
+        pass  # Not UTF-8
+    return path
+
+
+def filesys_decode(path):
+    """
+    Ensure that the given path is decoded,
+    NONE when no expected encoding works
+    """
+
+    if isinstance(path, six.text_type):
+        return path
+
+    fs_enc = sys.getfilesystemencoding() or 'utf-8'
+    candidates = fs_enc, 'utf-8'
+
+    for enc in candidates:
+        try:
+            return path.decode(enc)
+        except UnicodeDecodeError:
+            continue
+
+
+def try_encode(string, enc):
+    "turn unicode encoding into a functional routine"
+    try:
+        return string.encode(enc)
+    except UnicodeEncodeError:
+        return None
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/version.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/version.py
new file mode 100644
index 00000000..95e18696
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/version.py
@@ -0,0 +1,6 @@
+import pkg_resources
+
+try:
+    __version__ = pkg_resources.get_distribution('setuptools').version
+except Exception:
+    __version__ = 'unknown'
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/wheel.py
new file mode 100644
index 00000000..e11f0a1d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/wheel.py
@@ -0,0 +1,211 @@
+"""Wheels support."""
+
+from distutils.util import get_platform
+import email
+import itertools
+import os
+import posixpath
+import re
+import zipfile
+
+import pkg_resources
+import setuptools
+from pkg_resources import parse_version
+from setuptools.extern.packaging.utils import canonicalize_name
+from setuptools.extern.six import PY3
+from setuptools import pep425tags
+from setuptools.command.egg_info import write_requirements
+
+
+__metaclass__ = type
+
+
+WHEEL_NAME = re.compile(
+    r"""^(?P<project_name>.+?)-(?P<version>\d.*?)
+    ((-(?P<build>\d.*?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?)
+    )\.whl$""",
+    re.VERBOSE).match
+
+NAMESPACE_PACKAGE_INIT = '''\
+try:
+    __import__('pkg_resources').declare_namespace(__name__)
+except ImportError:
+    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
+'''
+
+
+def unpack(src_dir, dst_dir):
+    '''Move everything under `src_dir` to `dst_dir`, and delete the former.'''
+    for dirpath, dirnames, filenames in os.walk(src_dir):
+        subdir = os.path.relpath(dirpath, src_dir)
+        for f in filenames:
+            src = os.path.join(dirpath, f)
+            dst = os.path.join(dst_dir, subdir, f)
+            os.renames(src, dst)
+        for n, d in reversed(list(enumerate(dirnames))):
+            src = os.path.join(dirpath, d)
+            dst = os.path.join(dst_dir, subdir, d)
+            if not os.path.exists(dst):
+                # Directory does not exist in destination,
+                # rename it and prune it from os.walk list.
+                os.renames(src, dst)
+                del dirnames[n]
+    # Cleanup.
+    for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True):
+        assert not filenames
+        os.rmdir(dirpath)
+
+
+class Wheel:
+
+    def __init__(self, filename):
+        match = WHEEL_NAME(os.path.basename(filename))
+        if match is None:
+            raise ValueError('invalid wheel name: %r' % filename)
+        self.filename = filename
+        for k, v in match.groupdict().items():
+            setattr(self, k, v)
+
+    def tags(self):
+        '''List tags (py_version, abi, platform) supported by this wheel.'''
+        return itertools.product(
+            self.py_version.split('.'),
+            self.abi.split('.'),
+            self.platform.split('.'),
+        )
+
+    def is_compatible(self):
+        '''Is the wheel is compatible with the current platform?'''
+        supported_tags = pep425tags.get_supported()
+        return next((True for t in self.tags() if t in supported_tags), False)
+
+    def egg_name(self):
+        return pkg_resources.Distribution(
+            project_name=self.project_name, version=self.version,
+            platform=(None if self.platform == 'any' else get_platform()),
+        ).egg_name() + '.egg'
+
+    def get_dist_info(self, zf):
+        # find the correct name of the .dist-info dir in the wheel file
+        for member in zf.namelist():
+            dirname = posixpath.dirname(member)
+            if (dirname.endswith('.dist-info') and
+                    canonicalize_name(dirname).startswith(
+                        canonicalize_name(self.project_name))):
+                return dirname
+        raise ValueError("unsupported wheel format. .dist-info not found")
+
+    def install_as_egg(self, destination_eggdir):
+        '''Install wheel as an egg directory.'''
+        with zipfile.ZipFile(self.filename) as zf:
+            self._install_as_egg(destination_eggdir, zf)
+
+    def _install_as_egg(self, destination_eggdir, zf):
+        dist_basename = '%s-%s' % (self.project_name, self.version)
+        dist_info = self.get_dist_info(zf)
+        dist_data = '%s.data' % dist_basename
+        egg_info = os.path.join(destination_eggdir, 'EGG-INFO')
+
+        self._convert_metadata(zf, destination_eggdir, dist_info, egg_info)
+        self._move_data_entries(destination_eggdir, dist_data)
+        self._fix_namespace_packages(egg_info, destination_eggdir)
+
+    @staticmethod
+    def _convert_metadata(zf, destination_eggdir, dist_info, egg_info):
+        def get_metadata(name):
+            with zf.open(posixpath.join(dist_info, name)) as fp:
+                value = fp.read().decode('utf-8') if PY3 else fp.read()
+                return email.parser.Parser().parsestr(value)
+
+        wheel_metadata = get_metadata('WHEEL')
+        # Check wheel format version is supported.
+        wheel_version = parse_version(wheel_metadata.get('Wheel-Version'))
+        wheel_v1 = (
+            parse_version('1.0') <= wheel_version < parse_version('2.0dev0')
+        )
+        if not wheel_v1:
+            raise ValueError(
+                'unsupported wheel format version: %s' % wheel_version)
+        # Extract to target directory.
+        os.mkdir(destination_eggdir)
+        zf.extractall(destination_eggdir)
+        # Convert metadata.
+        dist_info = os.path.join(destination_eggdir, dist_info)
+        dist = pkg_resources.Distribution.from_location(
+            destination_eggdir, dist_info,
+            metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
+        )
+
+        # Note: Evaluate and strip markers now,
+        # as it's difficult to convert back from the syntax:
+        # foobar; "linux" in sys_platform and extra == 'test'
+        def raw_req(req):
+            req.marker = None
+            return str(req)
+        install_requires = list(sorted(map(raw_req, dist.requires())))
+        extras_require = {
+            extra: sorted(
+                req
+                for req in map(raw_req, dist.requires((extra,)))
+                if req not in install_requires
+            )
+            for extra in dist.extras
+        }
+        os.rename(dist_info, egg_info)
+        os.rename(
+            os.path.join(egg_info, 'METADATA'),
+            os.path.join(egg_info, 'PKG-INFO'),
+        )
+        setup_dist = setuptools.Distribution(
+            attrs=dict(
+                install_requires=install_requires,
+                extras_require=extras_require,
+            ),
+        )
+        write_requirements(
+            setup_dist.get_command_obj('egg_info'),
+            None,
+            os.path.join(egg_info, 'requires.txt'),
+        )
+
+    @staticmethod
+    def _move_data_entries(destination_eggdir, dist_data):
+        """Move data entries to their correct location."""
+        dist_data = os.path.join(destination_eggdir, dist_data)
+        dist_data_scripts = os.path.join(dist_data, 'scripts')
+        if os.path.exists(dist_data_scripts):
+            egg_info_scripts = os.path.join(
+                destination_eggdir, 'EGG-INFO', 'scripts')
+            os.mkdir(egg_info_scripts)
+            for entry in os.listdir(dist_data_scripts):
+                # Remove bytecode, as it's not properly handled
+                # during easy_install scripts install phase.
+                if entry.endswith('.pyc'):
+                    os.unlink(os.path.join(dist_data_scripts, entry))
+                else:
+                    os.rename(
+                        os.path.join(dist_data_scripts, entry),
+                        os.path.join(egg_info_scripts, entry),
+                    )
+            os.rmdir(dist_data_scripts)
+        for subdir in filter(os.path.exists, (
+            os.path.join(dist_data, d)
+            for d in ('data', 'headers', 'purelib', 'platlib')
+        )):
+            unpack(subdir, destination_eggdir)
+        if os.path.exists(dist_data):
+            os.rmdir(dist_data)
+
+    @staticmethod
+    def _fix_namespace_packages(egg_info, destination_eggdir):
+        namespace_packages = os.path.join(
+            egg_info, 'namespace_packages.txt')
+        if os.path.exists(namespace_packages):
+            with open(namespace_packages) as fp:
+                namespace_packages = fp.read().split()
+            for mod in namespace_packages:
+                mod_dir = os.path.join(destination_eggdir, *mod.split('.'))
+                mod_init = os.path.join(mod_dir, '__init__.py')
+                if os.path.exists(mod_dir) and not os.path.exists(mod_init):
+                    with open(mod_init, 'w') as fp:
+                        fp.write(NAMESPACE_PACKAGE_INIT)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/windows_support.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/windows_support.py
new file mode 100644
index 00000000..cb977cff
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/setuptools/windows_support.py
@@ -0,0 +1,29 @@
+import platform
+import ctypes
+
+
+def windows_only(func):
+    if platform.system() != 'Windows':
+        return lambda *args, **kwargs: None
+    return func
+
+
+@windows_only
+def hide_file(path):
+    """
+    Set the hidden attribute on a file or directory.
+
+    From http://stackoverflow.com/questions/19622133/
+
+    `path` must be text.
+    """
+    __import__('ctypes.wintypes')
+    SetFileAttributes = ctypes.windll.kernel32.SetFileAttributesW
+    SetFileAttributes.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD
+    SetFileAttributes.restype = ctypes.wintypes.BOOL
+
+    FILE_ATTRIBUTE_HIDDEN = 0x02
+
+    ret = SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN)
+    if not ret:
+        raise ctypes.WinError()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/METADATA
new file mode 100644
index 00000000..801f7e61
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/METADATA
@@ -0,0 +1,58 @@
+Metadata-Version: 2.1
+Name: sexpdata
+Version: 0.0.3
+Summary: S-expression parser for Python
+Home-page: https://github.com/tkf/sexpdata
+Author: Takafumi Arakaki
+Author-email: aka.tkf@gmail.com
+License: BSD License
+Keywords: s-expression,lisp,parser
+Platform: UNKNOWN
+Classifier: Development Status :: 3 - Alpha
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.6
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.2
+Classifier: Programming Language :: Lisp
+Classifier: Programming Language :: Emacs-Lisp
+
+
+S-expression parser for Python
+==============================
+
+`sexpdata` is a simple S-expression parser/serializer.  It has
+simple `load` and `dump` functions like `pickle`, `json` or `PyYAML`
+module.
+
+>>> from sexpdata import loads, dumps
+>>> loads('("a" "b")')
+['a', 'b']
+>>> print(dumps(['a', 'b']))
+("a" "b")
+
+
+You can install `sexpdata` from PyPI_::
+
+  pip install sexpdata
+
+
+Links:
+
+* `Documentation (at Read the Docs) <http://sexpdata.readthedocs.org/>`_
+* `Repository (at GitHub) <https://github.com/tkf/sexpdata>`_
+* `Issue tracker (at GitHub) <https://github.com/tkf/sexpdata/issues>`_
+* `PyPI <http://pypi.python.org/pypi/sexpdata>`_
+* `Travis CI <https://travis-ci.org/#!/tkf/sexpdata>`_
+
+
+License
+-------
+
+`sexpdata` is licensed under the terms of the BSD 2-Clause License.
+See the source code for more information.
+
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/RECORD
new file mode 100644
index 00000000..a3b42234
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/RECORD
@@ -0,0 +1,7 @@
+__pycache__/sexpdata.cpython-37.pyc,,

+sexpdata-0.0.3.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4

+sexpdata-0.0.3.dist-info/METADATA,sha256=4OuLNErGf62_sP06lXQ7jzjzqhNhE1Mw0cFXIrAz1Qs,1574

+sexpdata-0.0.3.dist-info/RECORD,,

+sexpdata-0.0.3.dist-info/WHEEL,sha256=0rHDOana14hzsaua2J2L7Ztk6sto42O0noJt7O00ZjE,93

+sexpdata-0.0.3.dist-info/top_level.txt,sha256=TVvOAZStj3q1PhO1EFjyi59wnENJ6u-fx4LVh0f2DgQ,9

+sexpdata.py,sha256=v-tiE9KwaRNRwnQW8UYPpFONee56veFsCNzdXy-_2VM,18501

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/WHEEL
new file mode 100644
index 00000000..c1ce8476
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.4)
+Root-Is-Purelib: true
+Tag: cp37-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/top_level.txt
new file mode 100644
index 00000000..2182f643
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata-0.0.3.dist-info/top_level.txt
@@ -0,0 +1 @@
+sexpdata
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata.py
new file mode 100644
index 00000000..74f10b06
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/sexpdata.py
@@ -0,0 +1,675 @@
+# [[[cog import cog; cog.outl('"""\n%s\n"""' % file('README.rst').read()) ]]]
+"""
+S-expression parser for Python
+==============================
+
+`sexpdata` is a simple S-expression parser/serializer.  It has
+simple `load` and `dump` functions like `pickle`, `json` or `PyYAML`
+module.
+
+>>> from sexpdata import loads, dumps
+>>> loads('("a" "b")')
+['a', 'b']
+>>> print(dumps(['a', 'b']))
+("a" "b")
+
+
+You can install `sexpdata` from PyPI_::
+
+  pip install sexpdata
+
+
+Links:
+
+* `Documentation (at Read the Docs) <http://sexpdata.readthedocs.org/>`_
+* `Repository (at GitHub) <https://github.com/tkf/sexpdata>`_
+* `Issue tracker (at GitHub) <https://github.com/tkf/sexpdata/issues>`_
+* `PyPI <http://pypi.python.org/pypi/sexpdata>`_
+* `Travis CI <https://travis-ci.org/#!/tkf/sexpdata>`_
+
+
+License
+-------
+
+`sexpdata` is licensed under the terms of the BSD 2-Clause License.
+See the source code for more information.
+
+"""
+# [[[end]]]
+
+# Copyright (c) 2012 Takafumi Arakaki
+# All rights reserved.
+
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+
+# Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+__version__ = '0.0.3'
+__author__ = 'Takafumi Arakaki'
+__license__ = 'BSD License'
+__all__ = [
+    # API functions:
+    'load', 'loads', 'dump', 'dumps',
+    # Utility functions:
+    'car', 'cdr',
+    # S-expression classes:
+    'Symbol', 'String', 'Quoted',
+]
+
+import re
+from string import whitespace
+import functools
+
+BRACKETS = {'(': ')', '[': ']'}
+
+
+### Python 3 compatibility
+
+try:
+    unicode
+    PY3 = False
+except NameError:
+    basestring = unicode = str  # Python 3
+    PY3 = True
+
+
+def uformat(s, *args, **kwds):
+    """Alias of ``unicode(s).format(...)``."""
+    return tounicode(s).format(*args, **kwds)
+
+
+### Utility
+
+def tounicode(string):
+    """
+    Decode `string` if it is not unicode.  Do nothing in Python 3.
+    """
+    if not isinstance(string, unicode):
+        string = unicode(string, 'utf-8')
+    return string
+
+
+def return_as(converter):
+    """
+    Decorator to convert result of a function.
+
+    It is just a function composition. The following two codes are
+    equivalent.
+
+    Using `@return_as`::
+
+        @return_as(converter)
+        def generator(args):
+            ...
+
+        result = generator(args)
+
+    Manually do the same::
+
+        def generator(args):
+            ...
+
+        result = converter(generator(args))
+
+    Example:
+
+    >>> @return_as(list)
+    ... def f():
+    ...     for i in range(3):
+    ...         yield i
+    ...
+    >>> f()  # this gives a list, not an iterator
+    [0, 1, 2]
+
+    """
+    def wrapper(generator):
+        @functools.wraps(generator)
+        def func(*args, **kwds):
+            return converter(generator(*args, **kwds))
+        return func
+    return wrapper
+
+
+### Interface
+
+def load(filelike, **kwds):
+    """
+    Load object from S-expression stored in `filelike`.
+
+    :arg  filelike: A text stream object.
+
+    See :func:`loads` for valid keyword arguments.
+
+    >>> import io
+    >>> fp = io.StringIO()
+    >>> sexp = [Symbol('a'), Symbol('b')]   # let's dump and load this object
+    >>> dump(sexp, fp)
+    >>> _ = fp.seek(0)
+    >>> load(fp) == sexp
+    True
+
+    """
+    return loads(filelike.read(), **kwds)
+
+
+def loads(string, **kwds):
+    """
+    Load object from S-expression `string`.
+
+    :arg        string: String containing an S-expression.
+    :type          nil: str or None
+    :keyword       nil: A symbol interpreted as an empty list.
+                        Default is ``'nil'``.
+    :type         true: str or None
+    :keyword      true: A symbol interpreted as True.
+                        Default is ``'t'``.
+    :type        false: str or None
+    :keyword     false: A symbol interpreted as False.
+                        Default is ``None``.
+    :type     line_comment: str
+    :keyword  line_comment: Beginning of line comment.
+                            Default is ``';'``.
+
+    >>> loads("(a b)")
+    [Symbol('a'), Symbol('b')]
+    >>> loads("a")
+    Symbol('a')
+    >>> loads("(a 'b)")
+    [Symbol('a'), Quoted(Symbol('b'))]
+    >>> loads("(a '(b))")
+    [Symbol('a'), Quoted([Symbol('b')])]
+    >>> loads('''
+    ... ;; This is a line comment.
+    ... ("a" "b")  ; this is also a comment.
+    ... ''')
+    ['a', 'b']
+    >>> loads('''
+    ... # This is a line comment.
+    ... ("a" "b")  # this is also a comment.
+    ... ''', line_comment='#')
+    ['a', 'b']
+
+    ``nil`` is converted to an empty list by default.  You can use
+    keyword argument `nil` to change what symbol must be interpreted
+    as nil:
+
+    >>> loads("nil")
+    []
+    >>> loads("null", nil='null')
+    []
+    >>> loads("nil", nil=None)
+    Symbol('nil')
+
+    ``t`` is converted to True by default.  You can use keyword
+    argument `true` to change what symbol must be converted to True.:
+
+    >>> loads("t")
+    True
+    >>> loads("#t", true='#t')
+    True
+    >>> loads("t", true=None)
+    Symbol('t')
+
+    No symbol is converted to False by default.  You can use keyword
+    argument `false` to convert a symbol to False.
+
+    >>> loads("#f")
+    Symbol('#f')
+    >>> loads("#f", false='#f')
+    False
+    >>> loads("nil", false='nil', nil=None)
+    False
+
+    """
+    obj = parse(string, **kwds)
+    assert len(obj) == 1  # FIXME: raise an appropriate error
+    return obj[0]
+
+
+def dump(obj, filelike, **kwds):
+    """
+    Write `obj` as an S-expression into given stream `filelike`.
+
+    :arg       obj: A Python object.
+    :arg  filelike: A text stream object.
+
+    See :func:`dumps` for valid keyword arguments.
+
+    >>> import io
+    >>> fp = io.StringIO()
+    >>> dump([Symbol('a'), Symbol('b')], fp)
+    >>> print(fp.getvalue())
+    (a b)
+
+    """
+    filelike.write(unicode(dumps(obj)))
+
+
+def dumps(obj, **kwds):
+    """
+    Convert python object into an S-expression.
+
+    :arg           obj: A Python object.
+    :type       str_as: ``'symbol'`` or ``'string'``
+    :keyword    str_as: How string should be interpreted.
+                        Default is ``'string'``.
+    :type     tuple_as: ``'list'`` or ``'array'``
+    :keyword  tuple_as: How tuple should be interpreted.
+                        Default is ``'list'``.
+    :type      true_as: str
+    :keyword   true_as: How True should be interpreted.
+                        Default is ``'t'``
+    :type     false_as: str
+    :keyword  false_as: How False should be interpreted.
+                        Default is ``'()'``
+    :type      none_as: str
+    :keyword   none_as: How None should be interpreted.
+                        Default is ``'()'``
+
+    Basic usage:
+
+    >>> print(dumps(['a', 'b']))
+    ("a" "b")
+    >>> print(dumps(['a', 'b'], str_as='symbol'))
+    (a b)
+    >>> print(dumps(dict(a=1, b=2)))
+    (:a 1 :b 2)
+    >>> print(dumps([None, True, False, ()]))
+    (() t () ())
+    >>> print(dumps([None, True, False, ()],
+    ...             none_as='null', true_as='#t', false_as='#f'))
+    (null #t #f ())
+    >>> print(dumps(('a', 'b')))
+    ("a" "b")
+    >>> print(dumps(('a', 'b'), tuple_as='array'))
+    ["a" "b"]
+
+    More verbose usage:
+
+    >>> print(dumps([Symbol('a'), Symbol('b')]))
+    (a b)
+    >>> print(dumps(Symbol('a')))
+    a
+    >>> print(dumps([Symbol('a'), Quoted(Symbol('b'))]))
+    (a 'b)
+    >>> print(dumps([Symbol('a'), Quoted([Symbol('b')])]))
+    (a '(b))
+
+    """
+    return tosexp(obj, **kwds)
+
+
+def car(obj):
+    """
+    Alias of ``obj[0]``.
+
+    >>> car(loads('(a . b)'))
+    Symbol('a')
+    >>> car(loads('(a b)'))
+    Symbol('a')
+
+    """
+    return obj[0]
+
+
+def cdr(obj):
+    """
+    `cdr`-like function.
+
+    >>> cdr(loads('(a . b)'))
+    Symbol('b')
+    >>> cdr(loads('(a b)'))
+    [Symbol('b')]
+    >>> cdr(loads('(a . (b))'))
+    [Symbol('b')]
+    >>> cdr(loads('(a)'))
+    []
+    >>> cdr(loads('(a . nil)'))
+    []
+
+    """
+    # This is very lazy implementation.  Probably the best way to do
+    # it is to define `Cons` S-expression class.
+    if len(obj) > 2:
+        dot = obj[1]
+        if isinstance(dot, Symbol) and dot.value() == '.':
+            return obj[2]
+    return obj[1:]
+
+
+### Core
+
+def tosexp(obj, str_as='string', tuple_as='list',
+           true_as='t', false_as='()', none_as='()'):
+    """
+    Convert an object to an S-expression (`dumps` is just calling this).
+
+    See this table for comparison of lispy languages, to support them
+    as much as possible:
+    `Lisp: Common Lisp, Scheme/Racket, Clojure, Emacs Lisp - Hyperpolyglot
+    <http://hyperpolyglot.org/lisp>`_
+
+    """
+    _tosexp = lambda x: tosexp(
+        x, str_as=str_as, tuple_as=tuple_as,
+        true_as=true_as, false_as=false_as, none_as=none_as)
+    if isinstance(obj, list):
+        return Bracket(obj, '(').tosexp(_tosexp)
+    elif isinstance(obj, tuple):
+        if tuple_as == 'list':
+            return Bracket(obj, '(').tosexp(_tosexp)
+        elif tuple_as == 'array':
+            return Bracket(obj, '[').tosexp(_tosexp)
+        else:
+            raise ValueError(uformat("tuple_as={0!r} is not valid", tuple_as))
+    elif obj is True:  # must do this before ``isinstance(obj, int)``
+        return true_as
+    elif obj is False:
+        return false_as
+    elif obj is None:
+        return none_as
+    elif isinstance(obj, (int, float)):
+        return str(obj)
+    elif isinstance(obj, basestring):
+        if str_as == 'symbol':
+            return obj
+        elif str_as == 'string':
+            return String(obj).tosexp()
+        else:
+            raise ValueError(uformat("str_as={0!r} is not valid", str_as))
+    elif isinstance(obj, dict):
+        return _tosexp(dict_to_plist(obj))
+    elif isinstance(obj, SExpBase):
+        return obj.tosexp(_tosexp)
+    else:
+        raise TypeError(uformat(
+            "Object of type '{0}' cannot be converted by `tosexp`. "
+            "It's value is '{1!r}'", type(obj), obj))
+
+
+@return_as(list)
+def dict_to_plist(obj):
+    for key in obj:
+        yield Symbol(uformat(":{0}", key))
+        yield obj[key]
+
+
+class SExpBase(object):
+
+    def __init__(self, val):
+        self._val = val
+
+    def __repr__(self):
+        return uformat("{0}({1!r})", self.__class__.__name__, self._val)
+
+    def __eq__(self, other):
+        if isinstance(other, self.__class__):
+            return self._val == other._val
+        else:
+            return False
+
+    def value(self):
+        return self._val
+
+    def tosexp(self, tosexp=tosexp):
+        """
+        Decode this object into an S-expression string.
+
+        :arg tosexp: A function to be used when converting sub S-expression.
+
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def quote(cls, string):
+        for (s, q) in cls._lisp_quoted_specials:
+            string = string.replace(s, q)
+        return tounicode(string)
+
+    @classmethod
+    def unquote(cls, string):
+        return cls._lisp_quoted_to_raw.get(string, string)
+
+
+class Symbol(SExpBase):
+
+    _lisp_quoted_specials = [
+        ('\\', '\\\\'),    # must come first to avoid doubly quoting "\"
+        ("'", r"\'"), ("`", r"\`"), ('"', r'\"'),
+        ('(', r'\('), (')', r'\)'), ('[', r'\['), (']', r'\]'),
+        (' ', r'\ '), ('.', r'\.'), (',', r'\,'), ('?', r'\?'),
+        (';', r'\;'), ('#', r'\#'),
+    ]
+
+    _lisp_quoted_to_raw = dict((q, r) for (r, q) in _lisp_quoted_specials)
+
+    def tosexp(self, tosexp=None):
+        return self.quote(self._val)
+
+
+class String(SExpBase):
+
+    _lisp_quoted_specials = [  # from Pymacs
+        ('\\', '\\\\'),    # must come first to avoid doubly quoting "\"
+        ('"', '\\"'), ('\b', '\\b'), ('\f', '\\f'),
+        ('\n', '\\n'), ('\r', '\\r'), ('\t', '\\t')]
+
+    _lisp_quoted_to_raw = dict((q, r) for (r, q) in _lisp_quoted_specials)
+
+    def tosexp(self, tosexp=None):
+        return uformat('"{0}"', self.quote(self._val))
+
+
+class Quoted(SExpBase):
+
+    def tosexp(self, tosexp=tosexp):
+        return uformat("'{0}", tosexp(self._val))
+
+
+class Bracket(SExpBase):
+
+    def __init__(self, val, bra):
+        assert bra in BRACKETS  # FIXME: raise an appropriate error
+        super(Bracket, self).__init__(val)
+        self._bra = bra
+
+    def __repr__(self):
+        return uformat("{0}({1!r}, {2!r})",
+            self.__class__.__name__, self._val, self._bra)
+
+    def tosexp(self, tosexp=tosexp):
+        bra = self._bra
+        ket = BRACKETS[self._bra]
+        c = ' '.join(tosexp(v) for v in self._val)
+        return uformat("{0}{1}{2}", bra, c, ket)
+
+
+def bracket(val, bra):
+    if bra == '(':
+        return val
+    else:
+        return Bracket(val, bra)
+
+
+class ExpectClosingBracket(Exception):
+
+    def __init__(self, got, expect):
+        super(ExpectClosingBracket, self).__init__(uformat(
+            "Not enough closing brackets. "
+            "Expected {0!r} to be the last letter in the sexp. "
+            "Got: {1!r}", expect, got))
+
+
+class ExpectNothing(Exception):
+
+    def __init__(self, got):
+        super(ExpectNothing, self).__init__(uformat(
+            "Too many closing brackets. "
+            "Expected no character left in the sexp. "
+            "Got: {0!r}", got))
+
+
+class Parser(object):
+
+    closing_brackets = set(BRACKETS.values())
+    atom_end = \
+        set(BRACKETS) | set(closing_brackets) | set('"\'') | set(whitespace)
+    atom_end_or_escape_re = re.compile("|".join(map(re.escape,
+                                                    atom_end | set('\\'))))
+    quote_or_escape_re = re.compile(r'"|\\')
+
+    def __init__(self, string, string_to=None, nil='nil', true='t', false=None,
+                 line_comment=';'):
+        self.string = string
+        self.nil = nil
+        self.true = true
+        self.false = false
+        self.string_to = (lambda x: x) if string_to is None else string_to
+        self.line_comment = line_comment
+
+    def parse_str(self, i):
+        string = self.string
+        chars = []
+        append = chars.append
+        search = self.quote_or_escape_re.search
+
+        assert string[i] == '"'  # never fail
+        while True:
+            i += 1
+            match = search(string, i)
+            end = match.start()
+            append(string[i:end])
+            c = match.group()
+            if c == '"':
+                i = end + 1
+                break
+            elif c == '\\':
+                i = end + 1
+                append(String.unquote(c + string[i]))
+        else:
+            raise ExpectClosingBracket('"', None)
+        return (i, ''.join(chars))
+
+    def parse_atom(self, i):
+        string = self.string
+        chars = []
+        append = chars.append
+        search = self.atom_end_or_escape_re.search
+        atom_end = self.atom_end
+
+        while True:
+            match = search(string, i)
+            if not match:
+                append(string[i:])
+                i = len(string)
+                break
+            end = match.start()
+            append(string[i:end])
+            c = match.group()
+            if c in atom_end:
+                i = end  # this is different from str
+                break
+            elif c == '\\':
+                i = end + 1
+                append(Symbol.unquote(c + string[i]))
+            i += 1
+        else:
+            raise ExpectClosingBracket('"', None)
+        return (i, self.atom(''.join(chars)))
+
+    def atom(self, token):
+        if token == self.nil:
+            return []
+        if token == self.true:
+            return True
+        if token == self.false:
+            return False
+        try:
+            return int(token)
+        except ValueError:
+            try:
+                return float(token)
+            except ValueError:
+                return Symbol(token)
+
+    def parse_sexp(self, i):
+        string = self.string
+        len_string = len(self.string)
+        sexp = []
+        append = sexp.append
+        while i < len_string:
+            c = string[i]
+            if c == '"':
+                (i, subsexp) = self.parse_str(i)
+                append(self.string_to(subsexp))
+            elif c in whitespace:
+                i += 1
+                continue
+            elif c in BRACKETS:
+                close = BRACKETS[c]
+                (i, subsexp) = self.parse_sexp(i + 1)
+                append(bracket(subsexp, c))
+                try:
+                    nc = string[i]
+                except IndexError:
+                    nc = None
+                if nc != close:
+                    raise ExpectClosingBracket(nc, close)
+                i += 1
+            elif c in self.closing_brackets:
+                break
+            elif c == "'":
+                (i, subsexp) = self.parse_sexp(i + 1)
+                append(Quoted(subsexp[0]))
+                sexp.extend(subsexp[1:])
+            elif c == self.line_comment:
+                i = string.find('\n', i) + 1
+                if i <= 0:
+                    i = len_string
+                    break
+            else:
+                (i, subsexp) = self.parse_atom(i)
+                append(subsexp)
+        return (i, sexp)
+
+    def parse(self):
+        (i, sexp) = self.parse_sexp(0)
+        if i < len(self.string):
+            raise ExpectNothing(self.string[i:])
+        return sexp
+
+
+def parse(string, **kwds):
+    """
+    Parse s-expression.
+
+    >>> parse("(a b)")
+    [[Symbol('a'), Symbol('b')]]
+    >>> parse("a")
+    [Symbol('a')]
+    >>> parse("(a 'b)")
+    [[Symbol('a'), Quoted(Symbol('b'))]]
+    >>> parse("(a '(b))")
+    [[Symbol('a'), Quoted([Symbol('b')])]]
+
+    """
+    return Parser(string, **kwds).parse()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/INSTALLER b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/INSTALLER
new file mode 100644
index 00000000..a1b589e3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/LICENSE.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/LICENSE.txt
new file mode 100644
index 00000000..c3441e6c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/LICENSE.txt
@@ -0,0 +1,22 @@
+"wheel" copyright (c) 2012-2014 Daniel Holth <dholth@fastmail.fm> and
+contributors.
+
+The MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/METADATA b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/METADATA
new file mode 100644
index 00000000..3685e113
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/METADATA
@@ -0,0 +1,60 @@
+Metadata-Version: 2.1
+Name: wheel
+Version: 0.33.4
+Summary: A built-package format for Python.
+Home-page: https://github.com/pypa/wheel
+Author: Daniel Holth
+Author-email: dholth@fastmail.fm
+Maintainer: Alex Grönholm
+Maintainer-email: alex.gronholm@nextday.fi
+License: MIT
+Project-URL: Documentation, https://wheel.readthedocs.io/
+Project-URL: Changelog, https://wheel.readthedocs.io/en/stable/news.html
+Project-URL: Issue Tracker, https://github.com/pypa/wheel/issues
+Keywords: wheel,packaging
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Topic :: System :: Archiving :: Packaging
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
+Provides-Extra: test
+Requires-Dist: pytest (>=3.0.0) ; extra == 'test'
+Requires-Dist: pytest-cov ; extra == 'test'
+
+wheel
+=====
+
+This library is the reference implementation of the Python wheel packaging
+standard, as defined in `PEP 427`_.
+
+It has two different roles:
+
+#. A setuptools_ extension for building wheels that provides the
+   ``bdist_wheel`` setuptools command
+#. A command line tool for working with wheel files
+
+It should be noted that wheel is **not** intended to be used as a library, and
+as such there is no stable, public API.
+
+.. _PEP 427: https://www.python.org/dev/peps/pep-0427/
+.. _setuptools: https://pypi.org/project/setuptools/
+
+
+Code of Conduct
+---------------
+
+Everyone interacting in the wheel project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PyPA Code of Conduct`_.
+
+.. _PyPA Code of Conduct: https://www.pypa.io/en/latest/code-of-conduct/
+
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/RECORD b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/RECORD
new file mode 100644
index 00000000..50bc60c7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/RECORD
@@ -0,0 +1,32 @@
+../../../bin/wheel,sha256=krCR5nxhG_1igjCv621GmP_ICBYqFITLf4VrWDIcFvY,256

+wheel-0.33.4.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4

+wheel-0.33.4.dist-info/LICENSE.txt,sha256=zKniDGrx_Pv2lAjzd3aShsvuvN7TNhAMm0o_NfvmNeQ,1125

+wheel-0.33.4.dist-info/METADATA,sha256=wyJg2oitG9m-Uh5ia99JynhzPDzo2cJmrCSsqYpRMtc,2082

+wheel-0.33.4.dist-info/RECORD,,

+wheel-0.33.4.dist-info/WHEEL,sha256=h_aVn5OB2IERUjMbi2pucmR_zzWJtk303YXvhh60NJ8,110

+wheel-0.33.4.dist-info/entry_points.txt,sha256=N8HbYFST3yrNQYeB2wXWBEPUhFsEtKNRPaCFGJPyqyc,108

+wheel-0.33.4.dist-info/top_level.txt,sha256=HxSBIbgEstMPe4eFawhA66Mq-QYHMopXVoAncfjb_1c,6

+wheel/__init__.py,sha256=gdfDa6ufU3P8afREFDBD26jo-ncuKtumgvlnZIGSmKc,96

+wheel/__main__.py,sha256=lF-YLO4hdQmoWuh4eWZd8YL1U95RSdm76sNLBXa0vjE,417

+wheel/__pycache__/__init__.cpython-37.pyc,,

+wheel/__pycache__/__main__.cpython-37.pyc,,

+wheel/__pycache__/bdist_wheel.cpython-37.pyc,,

+wheel/__pycache__/metadata.cpython-37.pyc,,

+wheel/__pycache__/pep425tags.cpython-37.pyc,,

+wheel/__pycache__/pkginfo.cpython-37.pyc,,

+wheel/__pycache__/util.cpython-37.pyc,,

+wheel/__pycache__/wheelfile.cpython-37.pyc,,

+wheel/bdist_wheel.py,sha256=U3ljAOGgc8UGMKqxOf5YEKE1W-nt99X6RemMi-poBB8,14757

+wheel/cli/__init__.py,sha256=GWSoGUpRabTf8bk3FsNTPrc5Fsr8YOv2dX55iY2W7eY,2572

+wheel/cli/__pycache__/__init__.cpython-37.pyc,,

+wheel/cli/__pycache__/convert.cpython-37.pyc,,

+wheel/cli/__pycache__/pack.cpython-37.pyc,,

+wheel/cli/__pycache__/unpack.cpython-37.pyc,,

+wheel/cli/convert.py,sha256=me0l6G4gSw-EBVhzjSr7yWYWBp9spMz7mnXlyJTiXso,9497

+wheel/cli/pack.py,sha256=vkvZc4-rRZyWiwc6sHjpqIjzwDRMEF5u3JUNU9NY_jA,2263

+wheel/cli/unpack.py,sha256=0VWzT7U_xyenTPwEVavxqvdee93GPvAFHnR3Uu91aRc,673

+wheel/metadata.py,sha256=uBv2aOz4U2sERF834C8DeNo235drcsp3ypTzT7MTWEA,4699

+wheel/pep425tags.py,sha256=Jdjbnq17kqwPRKJCMb2E1VccNgnC3H6iQL7VGaxkPao,5908

+wheel/pkginfo.py,sha256=GR76kupQzn1x9sKDaXuE6B6FsZ4OkfRtG7pndlXPvQ4,1257

+wheel/util.py,sha256=zwVIk-9qWVQLRMgkgQTMp4TRE4HY03-tCUxLrtCpsfU,924

+wheel/wheelfile.py,sha256=Mtt6mUaea-wABqtN5SW3Rn6bVvw-bdcSKaR2SjWZLG4,7222

diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/WHEEL b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/WHEEL
new file mode 100644
index 00000000..78e6f69d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.4)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/entry_points.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/entry_points.txt
new file mode 100644
index 00000000..b27acadd
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/entry_points.txt
@@ -0,0 +1,6 @@
+[console_scripts]
+wheel = wheel.cli:main
+
+[distutils.commands]
+bdist_wheel = wheel.bdist_wheel:bdist_wheel
+
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/top_level.txt b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/top_level.txt
new file mode 100644
index 00000000..2309722a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel-0.33.4.dist-info/top_level.txt
@@ -0,0 +1 @@
+wheel
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__init__.py
new file mode 100644
index 00000000..0f8ca70c
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__init__.py
@@ -0,0 +1,2 @@
+# __variables__ with double-quoted values will be available in setup.py:
+__version__ = "0.33.4"
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__main__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__main__.py
new file mode 100644
index 00000000..b3773a20
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__main__.py
@@ -0,0 +1,19 @@
+"""
+Wheel command line tool (enable python -m wheel syntax)
+"""
+
+import sys
+
+
+def main():  # needed for console script
+    if __package__ == '':
+        # To be able to run 'python wheel-0.9.whl/wheel':
+        import os.path
+        path = os.path.dirname(os.path.dirname(__file__))
+        sys.path[0:0] = [path]
+    import wheel.cli
+    sys.exit(wheel.cli.main())
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..526d7ba0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__main__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__main__.cpython-37.pyc
new file mode 100644
index 00000000..b7e299ea
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/__main__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/bdist_wheel.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/bdist_wheel.cpython-37.pyc
new file mode 100644
index 00000000..7f9c06c0
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/bdist_wheel.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/metadata.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/metadata.cpython-37.pyc
new file mode 100644
index 00000000..856e8f17
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/metadata.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pep425tags.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pep425tags.cpython-37.pyc
new file mode 100644
index 00000000..a5003899
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pep425tags.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pkginfo.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pkginfo.cpython-37.pyc
new file mode 100644
index 00000000..35f0e138
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/pkginfo.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/util.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/util.cpython-37.pyc
new file mode 100644
index 00000000..e8ee9a5d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/util.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/wheelfile.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/wheelfile.cpython-37.pyc
new file mode 100644
index 00000000..7e81b449
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/__pycache__/wheelfile.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/bdist_wheel.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/bdist_wheel.py
new file mode 100644
index 00000000..c79307b5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/bdist_wheel.py
@@ -0,0 +1,372 @@
+"""
+Create a wheel (.whl) distribution.
+
+A wheel is a built archive format.
+"""
+
+import os
+import shutil
+import sys
+import re
+from email.generator import Generator
+from distutils.core import Command
+from distutils.sysconfig import get_python_version
+from distutils import log as logger
+from glob import iglob
+from shutil import rmtree
+from warnings import warn
+
+import pkg_resources
+
+from .pep425tags import get_abbr_impl, get_impl_ver, get_abi_tag, get_platform
+from .pkginfo import write_pkg_info
+from .metadata import pkginfo_to_metadata
+from .wheelfile import WheelFile
+from . import pep425tags
+from . import __version__ as wheel_version
+
+
+safe_name = pkg_resources.safe_name
+safe_version = pkg_resources.safe_version
+
+PY_LIMITED_API_PATTERN = r'cp3\d'
+
+
+def safer_name(name):
+    return safe_name(name).replace('-', '_')
+
+
+def safer_version(version):
+    return safe_version(version).replace('-', '_')
+
+
+class bdist_wheel(Command):
+
+    description = 'create a wheel distribution'
+
+    user_options = [('bdist-dir=', 'b',
+                     "temporary directory for creating the distribution"),
+                    ('plat-name=', 'p',
+                     "platform name to embed in generated filenames "
+                     "(default: %s)" % get_platform()),
+                    ('keep-temp', 'k',
+                     "keep the pseudo-installation tree around after " +
+                     "creating the distribution archive"),
+                    ('dist-dir=', 'd',
+                     "directory to put final built distributions in"),
+                    ('skip-build', None,
+                     "skip rebuilding everything (for testing/debugging)"),
+                    ('relative', None,
+                     "build the archive using relative paths "
+                     "(default: false)"),
+                    ('owner=', 'u',
+                     "Owner name used when creating a tar file"
+                     " [default: current user]"),
+                    ('group=', 'g',
+                     "Group name used when creating a tar file"
+                     " [default: current group]"),
+                    ('universal', None,
+                     "make a universal wheel"
+                     " (default: false)"),
+                    ('python-tag=', None,
+                     "Python implementation compatibility tag"
+                     " (default: py%s)" % get_impl_ver()[0]),
+                    ('build-number=', None,
+                     "Build number for this particular version. "
+                     "As specified in PEP-0427, this must start with a digit. "
+                     "[default: None]"),
+                    ('py-limited-api=', None,
+                     "Python tag (cp32|cp33|cpNN) for abi3 wheel tag"
+                     " (default: false)"),
+                    ]
+
+    boolean_options = ['keep-temp', 'skip-build', 'relative', 'universal']
+
+    def initialize_options(self):
+        self.bdist_dir = None
+        self.data_dir = None
+        self.plat_name = None
+        self.plat_tag = None
+        self.format = 'zip'
+        self.keep_temp = False
+        self.dist_dir = None
+        self.egginfo_dir = None
+        self.root_is_pure = None
+        self.skip_build = None
+        self.relative = False
+        self.owner = None
+        self.group = None
+        self.universal = False
+        self.python_tag = 'py' + get_impl_ver()[0]
+        self.build_number = None
+        self.py_limited_api = False
+        self.plat_name_supplied = False
+
+    def finalize_options(self):
+        if self.bdist_dir is None:
+            bdist_base = self.get_finalized_command('bdist').bdist_base
+            self.bdist_dir = os.path.join(bdist_base, 'wheel')
+
+        self.data_dir = self.wheel_dist_name + '.data'
+        self.plat_name_supplied = self.plat_name is not None
+
+        need_options = ('dist_dir', 'plat_name', 'skip_build')
+
+        self.set_undefined_options('bdist',
+                                   *zip(need_options, need_options))
+
+        self.root_is_pure = not (self.distribution.has_ext_modules()
+                                 or self.distribution.has_c_libraries())
+
+        if self.py_limited_api and not re.match(PY_LIMITED_API_PATTERN, self.py_limited_api):
+            raise ValueError("py-limited-api must match '%s'" % PY_LIMITED_API_PATTERN)
+
+        # Support legacy [wheel] section for setting universal
+        wheel = self.distribution.get_option_dict('wheel')
+        if 'universal' in wheel:
+            # please don't define this in your global configs
+            logger.warn('The [wheel] section is deprecated. Use [bdist_wheel] instead.')
+            val = wheel['universal'][1].strip()
+            if val.lower() in ('1', 'true', 'yes'):
+                self.universal = True
+
+        if self.build_number is not None and not self.build_number[:1].isdigit():
+            raise ValueError("Build tag (build-number) must start with a digit.")
+
+    @property
+    def wheel_dist_name(self):
+        """Return distribution full name with - replaced with _"""
+        components = (safer_name(self.distribution.get_name()),
+                      safer_version(self.distribution.get_version()))
+        if self.build_number:
+            components += (self.build_number,)
+        return '-'.join(components)
+
+    def get_tag(self):
+        # bdist sets self.plat_name if unset, we should only use it for purepy
+        # wheels if the user supplied it.
+        if self.plat_name_supplied:
+            plat_name = self.plat_name
+        elif self.root_is_pure:
+            plat_name = 'any'
+        else:
+            plat_name = self.plat_name or get_platform()
+            if plat_name in ('linux-x86_64', 'linux_x86_64') and sys.maxsize == 2147483647:
+                plat_name = 'linux_i686'
+        plat_name = plat_name.replace('-', '_').replace('.', '_')
+
+        if self.root_is_pure:
+            if self.universal:
+                impl = 'py2.py3'
+            else:
+                impl = self.python_tag
+            tag = (impl, 'none', plat_name)
+        else:
+            impl_name = get_abbr_impl()
+            impl_ver = get_impl_ver()
+            impl = impl_name + impl_ver
+            # We don't work on CPython 3.1, 3.0.
+            if self.py_limited_api and (impl_name + impl_ver).startswith('cp3'):
+                impl = self.py_limited_api
+                abi_tag = 'abi3'
+            else:
+                abi_tag = str(get_abi_tag()).lower()
+            tag = (impl, abi_tag, plat_name)
+            supported_tags = pep425tags.get_supported(
+                supplied_platform=plat_name if self.plat_name_supplied else None)
+            # XXX switch to this alternate implementation for non-pure:
+            if not self.py_limited_api:
+                assert tag == supported_tags[0], "%s != %s" % (tag, supported_tags[0])
+            assert tag in supported_tags, "would build wheel with unsupported tag {}".format(tag)
+        return tag
+
+    def run(self):
+        build_scripts = self.reinitialize_command('build_scripts')
+        build_scripts.executable = 'python'
+        build_scripts.force = True
+
+        build_ext = self.reinitialize_command('build_ext')
+        build_ext.inplace = False
+
+        if not self.skip_build:
+            self.run_command('build')
+
+        install = self.reinitialize_command('install',
+                                            reinit_subcommands=True)
+        install.root = self.bdist_dir
+        install.compile = False
+        install.skip_build = self.skip_build
+        install.warn_dir = False
+
+        # A wheel without setuptools scripts is more cross-platform.
+        # Use the (undocumented) `no_ep` option to setuptools'
+        # install_scripts command to avoid creating entry point scripts.
+        install_scripts = self.reinitialize_command('install_scripts')
+        install_scripts.no_ep = True
+
+        # Use a custom scheme for the archive, because we have to decide
+        # at installation time which scheme to use.
+        for key in ('headers', 'scripts', 'data', 'purelib', 'platlib'):
+            setattr(install,
+                    'install_' + key,
+                    os.path.join(self.data_dir, key))
+
+        basedir_observed = ''
+
+        if os.name == 'nt':
+            # win32 barfs if any of these are ''; could be '.'?
+            # (distutils.command.install:change_roots bug)
+            basedir_observed = os.path.normpath(os.path.join(self.data_dir, '..'))
+            self.install_libbase = self.install_lib = basedir_observed
+
+        setattr(install,
+                'install_purelib' if self.root_is_pure else 'install_platlib',
+                basedir_observed)
+
+        logger.info("installing to %s", self.bdist_dir)
+
+        self.run_command('install')
+
+        impl_tag, abi_tag, plat_tag = self.get_tag()
+        archive_basename = "{}-{}-{}-{}".format(self.wheel_dist_name, impl_tag, abi_tag, plat_tag)
+        if not self.relative:
+            archive_root = self.bdist_dir
+        else:
+            archive_root = os.path.join(
+                self.bdist_dir,
+                self._ensure_relative(install.install_base))
+
+        self.set_undefined_options('install_egg_info', ('target', 'egginfo_dir'))
+        distinfo_dirname = '{}-{}.dist-info'.format(
+            safer_name(self.distribution.get_name()),
+            safer_version(self.distribution.get_version()))
+        distinfo_dir = os.path.join(self.bdist_dir, distinfo_dirname)
+        self.egg2dist(self.egginfo_dir, distinfo_dir)
+
+        self.write_wheelfile(distinfo_dir)
+
+        # Make the archive
+        if not os.path.exists(self.dist_dir):
+            os.makedirs(self.dist_dir)
+
+        wheel_path = os.path.join(self.dist_dir, archive_basename + '.whl')
+        with WheelFile(wheel_path, 'w') as wf:
+            wf.write_files(archive_root)
+
+        # Add to 'Distribution.dist_files' so that the "upload" command works
+        getattr(self.distribution, 'dist_files', []).append(
+            ('bdist_wheel', get_python_version(), wheel_path))
+
+        if not self.keep_temp:
+            logger.info('removing %s', self.bdist_dir)
+            if not self.dry_run:
+                rmtree(self.bdist_dir)
+
+    def write_wheelfile(self, wheelfile_base, generator='bdist_wheel (' + wheel_version + ')'):
+        from email.message import Message
+        msg = Message()
+        msg['Wheel-Version'] = '1.0'  # of the spec
+        msg['Generator'] = generator
+        msg['Root-Is-Purelib'] = str(self.root_is_pure).lower()
+        if self.build_number is not None:
+            msg['Build'] = self.build_number
+
+        # Doesn't work for bdist_wininst
+        impl_tag, abi_tag, plat_tag = self.get_tag()
+        for impl in impl_tag.split('.'):
+            for abi in abi_tag.split('.'):
+                for plat in plat_tag.split('.'):
+                    msg['Tag'] = '-'.join((impl, abi, plat))
+
+        wheelfile_path = os.path.join(wheelfile_base, 'WHEEL')
+        logger.info('creating %s', wheelfile_path)
+        with open(wheelfile_path, 'w') as f:
+            Generator(f, maxheaderlen=0).flatten(msg)
+
+    def _ensure_relative(self, path):
+        # copied from dir_util, deleted
+        drive, path = os.path.splitdrive(path)
+        if path[0:1] == os.sep:
+            path = drive + path[1:]
+        return path
+
+    @property
+    def license_paths(self):
+        metadata = self.distribution.get_option_dict('metadata')
+        files = set()
+        patterns = sorted({
+            option for option in metadata.get('license_files', ('', ''))[1].split()
+        })
+
+        if 'license_file' in metadata:
+            warn('The "license_file" option is deprecated. Use "license_files" instead.',
+                 DeprecationWarning)
+            files.add(metadata['license_file'][1])
+
+        if 'license_file' not in metadata and 'license_files' not in metadata:
+            patterns = ('LICEN[CS]E*', 'COPYING*', 'NOTICE*', 'AUTHORS*')
+
+        for pattern in patterns:
+            for path in iglob(pattern):
+                if path not in files and os.path.isfile(path):
+                    logger.info('adding license file "%s" (matched pattern "%s")', path, pattern)
+                    files.add(path)
+
+        return files
+
+    def egg2dist(self, egginfo_path, distinfo_path):
+        """Convert an .egg-info directory into a .dist-info directory"""
+        def adios(p):
+            """Appropriately delete directory, file or link."""
+            if os.path.exists(p) and not os.path.islink(p) and os.path.isdir(p):
+                shutil.rmtree(p)
+            elif os.path.exists(p):
+                os.unlink(p)
+
+        adios(distinfo_path)
+
+        if not os.path.exists(egginfo_path):
+            # There is no egg-info. This is probably because the egg-info
+            # file/directory is not named matching the distribution name used
+            # to name the archive file. Check for this case and report
+            # accordingly.
+            import glob
+            pat = os.path.join(os.path.dirname(egginfo_path), '*.egg-info')
+            possible = glob.glob(pat)
+            err = "Egg metadata expected at %s but not found" % (egginfo_path,)
+            if possible:
+                alt = os.path.basename(possible[0])
+                err += " (%s found - possible misnamed archive file?)" % (alt,)
+
+            raise ValueError(err)
+
+        if os.path.isfile(egginfo_path):
+            # .egg-info is a single file
+            pkginfo_path = egginfo_path
+            pkg_info = pkginfo_to_metadata(egginfo_path, egginfo_path)
+            os.mkdir(distinfo_path)
+        else:
+            # .egg-info is a directory
+            pkginfo_path = os.path.join(egginfo_path, 'PKG-INFO')
+            pkg_info = pkginfo_to_metadata(egginfo_path, pkginfo_path)
+
+            # ignore common egg metadata that is useless to wheel
+            shutil.copytree(egginfo_path, distinfo_path,
+                            ignore=lambda x, y: {'PKG-INFO', 'requires.txt', 'SOURCES.txt',
+                                                 'not-zip-safe'}
+                            )
+
+            # delete dependency_links if it is only whitespace
+            dependency_links_path = os.path.join(distinfo_path, 'dependency_links.txt')
+            with open(dependency_links_path, 'r') as dependency_links_file:
+                dependency_links = dependency_links_file.read().strip()
+            if not dependency_links:
+                adios(dependency_links_path)
+
+        write_pkg_info(os.path.join(distinfo_path, 'METADATA'), pkg_info)
+
+        for license_path in self.license_paths:
+            filename = os.path.basename(license_path)
+            shutil.copy(license_path, os.path.join(distinfo_path, filename))
+
+        adios(egginfo_path)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__init__.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__init__.py
new file mode 100644
index 00000000..95740bfb
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__init__.py
@@ -0,0 +1,88 @@
+"""
+Wheel command-line utility.
+"""
+
+from __future__ import print_function
+
+import argparse
+import os
+import sys
+
+
+def require_pkgresources(name):
+    try:
+        import pkg_resources  # noqa: F401
+    except ImportError:
+        raise RuntimeError("'{0}' needs pkg_resources (part of setuptools).".format(name))
+
+
+class WheelError(Exception):
+    pass
+
+
+def unpack_f(args):
+    from .unpack import unpack
+    unpack(args.wheelfile, args.dest)
+
+
+def pack_f(args):
+    from .pack import pack
+    pack(args.directory, args.dest_dir, args.build_number)
+
+
+def convert_f(args):
+    from .convert import convert
+    convert(args.files, args.dest_dir, args.verbose)
+
+
+def version_f(args):
+    from .. import __version__
+    print("wheel %s" % __version__)
+
+
+def parser():
+    p = argparse.ArgumentParser()
+    s = p.add_subparsers(help="commands")
+
+    unpack_parser = s.add_parser('unpack', help='Unpack wheel')
+    unpack_parser.add_argument('--dest', '-d', help='Destination directory',
+                               default='.')
+    unpack_parser.add_argument('wheelfile', help='Wheel file')
+    unpack_parser.set_defaults(func=unpack_f)
+
+    repack_parser = s.add_parser('pack', help='Repack wheel')
+    repack_parser.add_argument('directory', help='Root directory of the unpacked wheel')
+    repack_parser.add_argument('--dest-dir', '-d', default=os.path.curdir,
+                               help="Directory to store the wheel (default %(default)s)")
+    repack_parser.add_argument('--build-number', help="Build tag to use in the wheel name")
+    repack_parser.set_defaults(func=pack_f)
+
+    convert_parser = s.add_parser('convert', help='Convert egg or wininst to wheel')
+    convert_parser.add_argument('files', nargs='*', help='Files to convert')
+    convert_parser.add_argument('--dest-dir', '-d', default=os.path.curdir,
+                                help="Directory to store wheels (default %(default)s)")
+    convert_parser.add_argument('--verbose', '-v', action='store_true')
+    convert_parser.set_defaults(func=convert_f)
+
+    version_parser = s.add_parser('version', help='Print version and exit')
+    version_parser.set_defaults(func=version_f)
+
+    help_parser = s.add_parser('help', help='Show this help')
+    help_parser.set_defaults(func=lambda args: p.print_help())
+
+    return p
+
+
+def main():
+    p = parser()
+    args = p.parse_args()
+    if not hasattr(args, 'func'):
+        p.print_help()
+    else:
+        try:
+            args.func(args)
+            return 0
+        except WheelError as e:
+            print(e, file=sys.stderr)
+
+    return 1
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/__init__.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/__init__.cpython-37.pyc
new file mode 100644
index 00000000..d7767295
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/__init__.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/convert.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/convert.cpython-37.pyc
new file mode 100644
index 00000000..7144d22d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/convert.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/pack.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/pack.cpython-37.pyc
new file mode 100644
index 00000000..e4f96612
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/pack.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/unpack.cpython-37.pyc b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/unpack.cpython-37.pyc
new file mode 100644
index 00000000..cd535818
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/__pycache__/unpack.cpython-37.pyc
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/convert.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/convert.py
new file mode 100644
index 00000000..f1a793a6
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/convert.py
@@ -0,0 +1,269 @@
+import os.path
+import re
+import shutil
+import sys
+import tempfile
+import zipfile
+from distutils import dist
+from glob import iglob
+
+from ..bdist_wheel import bdist_wheel
+from ..wheelfile import WheelFile
+from . import WheelError, require_pkgresources
+
+egg_info_re = re.compile(r'''
+    (?P<name>.+?)-(?P<ver>.+?)
+    (-(?P<pyver>py\d\.\d)
+     (-(?P<arch>.+?))?
+    )?.egg$''', re.VERBOSE)
+
+
+class _bdist_wheel_tag(bdist_wheel):
+    # allow the client to override the default generated wheel tag
+    # The default bdist_wheel implementation uses python and abi tags
+    # of the running python process. This is not suitable for
+    # generating/repackaging prebuild binaries.
+
+    full_tag_supplied = False
+    full_tag = None  # None or a (pytag, soabitag, plattag) triple
+
+    def get_tag(self):
+        if self.full_tag_supplied and self.full_tag is not None:
+            return self.full_tag
+        else:
+            return bdist_wheel.get_tag(self)
+
+
+def egg2wheel(egg_path, dest_dir):
+    filename = os.path.basename(egg_path)
+    match = egg_info_re.match(filename)
+    if not match:
+        raise WheelError('Invalid egg file name: {}'.format(filename))
+
+    egg_info = match.groupdict()
+    dir = tempfile.mkdtemp(suffix="_e2w")
+    if os.path.isfile(egg_path):
+        # assume we have a bdist_egg otherwise
+        with zipfile.ZipFile(egg_path) as egg:
+            egg.extractall(dir)
+    else:
+        # support buildout-style installed eggs directories
+        for pth in os.listdir(egg_path):
+            src = os.path.join(egg_path, pth)
+            if os.path.isfile(src):
+                shutil.copy2(src, dir)
+            else:
+                shutil.copytree(src, os.path.join(dir, pth))
+
+    pyver = egg_info['pyver']
+    if pyver:
+        pyver = egg_info['pyver'] = pyver.replace('.', '')
+
+    arch = (egg_info['arch'] or 'any').replace('.', '_').replace('-', '_')
+
+    # assume all binary eggs are for CPython
+    abi = 'cp' + pyver[2:] if arch != 'any' else 'none'
+
+    root_is_purelib = egg_info['arch'] is None
+    if root_is_purelib:
+        bw = bdist_wheel(dist.Distribution())
+    else:
+        bw = _bdist_wheel_tag(dist.Distribution())
+
+    bw.root_is_pure = root_is_purelib
+    bw.python_tag = pyver
+    bw.plat_name_supplied = True
+    bw.plat_name = egg_info['arch'] or 'any'
+    if not root_is_purelib:
+        bw.full_tag_supplied = True
+        bw.full_tag = (pyver, abi, arch)
+
+    dist_info_dir = os.path.join(dir, '{name}-{ver}.dist-info'.format(**egg_info))
+    bw.egg2dist(os.path.join(dir, 'EGG-INFO'), dist_info_dir)
+    bw.write_wheelfile(dist_info_dir, generator='egg2wheel')
+    wheel_name = '{name}-{ver}-{pyver}-{}-{}.whl'.format(abi, arch, **egg_info)
+    with WheelFile(os.path.join(dest_dir, wheel_name), 'w') as wf:
+        wf.write_files(dir)
+
+    shutil.rmtree(dir)
+
+
+def parse_wininst_info(wininfo_name, egginfo_name):
+    """Extract metadata from filenames.
+
+    Extracts the 4 metadataitems needed (name, version, pyversion, arch) from
+    the installer filename and the name of the egg-info directory embedded in
+    the zipfile (if any).
+
+    The egginfo filename has the format::
+
+        name-ver(-pyver)(-arch).egg-info
+
+    The installer filename has the format::
+
+        name-ver.arch(-pyver).exe
+
+    Some things to note:
+
+    1. The installer filename is not definitive. An installer can be renamed
+       and work perfectly well as an installer. So more reliable data should
+       be used whenever possible.
+    2. The egg-info data should be preferred for the name and version, because
+       these come straight from the distutils metadata, and are mandatory.
+    3. The pyver from the egg-info data should be ignored, as it is
+       constructed from the version of Python used to build the installer,
+       which is irrelevant - the installer filename is correct here (even to
+       the point that when it's not there, any version is implied).
+    4. The architecture must be taken from the installer filename, as it is
+       not included in the egg-info data.
+    5. Architecture-neutral installers still have an architecture because the
+       installer format itself (being executable) is architecture-specific. We
+       should therefore ignore the architecture if the content is pure-python.
+    """
+
+    egginfo = None
+    if egginfo_name:
+        egginfo = egg_info_re.search(egginfo_name)
+        if not egginfo:
+            raise ValueError("Egg info filename %s is not valid" % (egginfo_name,))
+
+    # Parse the wininst filename
+    # 1. Distribution name (up to the first '-')
+    w_name, sep, rest = wininfo_name.partition('-')
+    if not sep:
+        raise ValueError("Installer filename %s is not valid" % (wininfo_name,))
+
+    # Strip '.exe'
+    rest = rest[:-4]
+    # 2. Python version (from the last '-', must start with 'py')
+    rest2, sep, w_pyver = rest.rpartition('-')
+    if sep and w_pyver.startswith('py'):
+        rest = rest2
+        w_pyver = w_pyver.replace('.', '')
+    else:
+        # Not version specific - use py2.py3. While it is possible that
+        # pure-Python code is not compatible with both Python 2 and 3, there
+        # is no way of knowing from the wininst format, so we assume the best
+        # here (the user can always manually rename the wheel to be more
+        # restrictive if needed).
+        w_pyver = 'py2.py3'
+    # 3. Version and architecture
+    w_ver, sep, w_arch = rest.rpartition('.')
+    if not sep:
+        raise ValueError("Installer filename %s is not valid" % (wininfo_name,))
+
+    if egginfo:
+        w_name = egginfo.group('name')
+        w_ver = egginfo.group('ver')
+
+    return {'name': w_name, 'ver': w_ver, 'arch': w_arch, 'pyver': w_pyver}
+
+
+def wininst2wheel(path, dest_dir):
+    with zipfile.ZipFile(path) as bdw:
+        # Search for egg-info in the archive
+        egginfo_name = None
+        for filename in bdw.namelist():
+            if '.egg-info' in filename:
+                egginfo_name = filename
+                break
+
+        info = parse_wininst_info(os.path.basename(path), egginfo_name)
+
+        root_is_purelib = True
+        for zipinfo in bdw.infolist():
+            if zipinfo.filename.startswith('PLATLIB'):
+                root_is_purelib = False
+                break
+        if root_is_purelib:
+            paths = {'purelib': ''}
+        else:
+            paths = {'platlib': ''}
+
+        dist_info = "%(name)s-%(ver)s" % info
+        datadir = "%s.data/" % dist_info
+
+        # rewrite paths to trick ZipFile into extracting an egg
+        # XXX grab wininst .ini - between .exe, padding, and first zip file.
+        members = []
+        egginfo_name = ''
+        for zipinfo in bdw.infolist():
+            key, basename = zipinfo.filename.split('/', 1)
+            key = key.lower()
+            basepath = paths.get(key, None)
+            if basepath is None:
+                basepath = datadir + key.lower() + '/'
+            oldname = zipinfo.filename
+            newname = basepath + basename
+            zipinfo.filename = newname
+            del bdw.NameToInfo[oldname]
+            bdw.NameToInfo[newname] = zipinfo
+            # Collect member names, but omit '' (from an entry like "PLATLIB/"
+            if newname:
+                members.append(newname)
+            # Remember egg-info name for the egg2dist call below
+            if not egginfo_name:
+                if newname.endswith('.egg-info'):
+                    egginfo_name = newname
+                elif '.egg-info/' in newname:
+                    egginfo_name, sep, _ = newname.rpartition('/')
+        dir = tempfile.mkdtemp(suffix="_b2w")
+        bdw.extractall(dir, members)
+
+    # egg2wheel
+    abi = 'none'
+    pyver = info['pyver']
+    arch = (info['arch'] or 'any').replace('.', '_').replace('-', '_')
+    # Wininst installers always have arch even if they are not
+    # architecture-specific (because the format itself is).
+    # So, assume the content is architecture-neutral if root is purelib.
+    if root_is_purelib:
+        arch = 'any'
+    # If the installer is architecture-specific, it's almost certainly also
+    # CPython-specific.
+    if arch != 'any':
+        pyver = pyver.replace('py', 'cp')
+    wheel_name = '-'.join((dist_info, pyver, abi, arch))
+    if root_is_purelib:
+        bw = bdist_wheel(dist.Distribution())
+    else:
+        bw = _bdist_wheel_tag(dist.Distribution())
+
+    bw.root_is_pure = root_is_purelib
+    bw.python_tag = pyver
+    bw.plat_name_supplied = True
+    bw.plat_name = info['arch'] or 'any'
+
+    if not root_is_purelib:
+        bw.full_tag_supplied = True
+        bw.full_tag = (pyver, abi, arch)
+
+    dist_info_dir = os.path.join(dir, '%s.dist-info' % dist_info)
+    bw.egg2dist(os.path.join(dir, egginfo_name), dist_info_dir)
+    bw.write_wheelfile(dist_info_dir, generator='wininst2wheel')
+
+    wheel_path = os.path.join(dest_dir, wheel_name)
+    with WheelFile(wheel_path, 'w') as wf:
+        wf.write_files(dir)
+
+    shutil.rmtree(dir)
+
+
+def convert(files, dest_dir, verbose):
+    # Only support wheel convert if pkg_resources is present
+    require_pkgresources('wheel convert')
+
+    for pat in files:
+        for installer in iglob(pat):
+            if os.path.splitext(installer)[1] == '.egg':
+                conv = egg2wheel
+            else:
+                conv = wininst2wheel
+
+            if verbose:
+                print("{}... ".format(installer))
+                sys.stdout.flush()
+
+            conv(installer, dest_dir)
+            if verbose:
+                print("OK")
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/pack.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/pack.py
new file mode 100644
index 00000000..af6e81c4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/pack.py
@@ -0,0 +1,58 @@
+from __future__ import print_function
+
+import os.path
+import re
+import sys
+
+from wheel.cli import WheelError
+from wheel.wheelfile import WheelFile
+
+DIST_INFO_RE = re.compile(r"^(?P<namever>(?P<name>.+?)-(?P<ver>\d.*?))\.dist-info$")
+
+
+def pack(directory, dest_dir, build_number):
+    """Repack a previously unpacked wheel directory into a new wheel file.
+
+    The .dist-info/WHEEL file must contain one or more tags so that the target
+    wheel file name can be determined.
+
+    :param directory: The unpacked wheel directory
+    :param dest_dir: Destination directory (defaults to the current directory)
+    """
+    # Find the .dist-info directory
+    dist_info_dirs = [fn for fn in os.listdir(directory)
+                      if os.path.isdir(os.path.join(directory, fn)) and DIST_INFO_RE.match(fn)]
+    if len(dist_info_dirs) > 1:
+        raise WheelError('Multiple .dist-info directories found in {}'.format(directory))
+    elif not dist_info_dirs:
+        raise WheelError('No .dist-info directories found in {}'.format(directory))
+
+    # Determine the target wheel filename
+    dist_info_dir = dist_info_dirs[0]
+    name_version = DIST_INFO_RE.match(dist_info_dir).group('namever')
+
+    # Add the build number if specific
+    if build_number:
+        name_version += '-' + build_number
+
+    # Read the tags from .dist-info/WHEEL
+    with open(os.path.join(directory, dist_info_dir, 'WHEEL')) as f:
+        tags = [line.split(' ')[1].rstrip() for line in f if line.startswith('Tag: ')]
+        if not tags:
+            raise WheelError('No tags present in {}/WHEEL; cannot determine target wheel filename'
+                             .format(dist_info_dir))
+
+    # Reassemble the tags for the wheel file
+    impls = sorted({tag.split('-')[0] for tag in tags})
+    abivers = sorted({tag.split('-')[1] for tag in tags})
+    platforms = sorted({tag.split('-')[2] for tag in tags})
+    tagline = '-'.join(['.'.join(impls), '.'.join(abivers), '.'.join(platforms)])
+
+    # Repack the wheel
+    wheel_path = os.path.join(dest_dir, '{}-{}.whl'.format(name_version, tagline))
+    with WheelFile(wheel_path, 'w') as wf:
+        print("Repacking wheel as {}...".format(wheel_path), end='')
+        sys.stdout.flush()
+        wf.write_files(directory)
+
+    print('OK')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/unpack.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/unpack.py
new file mode 100644
index 00000000..2e9857a3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/cli/unpack.py
@@ -0,0 +1,25 @@
+from __future__ import print_function
+
+import os.path
+import sys
+
+from ..wheelfile import WheelFile
+
+
+def unpack(path, dest='.'):
+    """Unpack a wheel.
+
+    Wheel content will be unpacked to {dest}/{name}-{ver}, where {name}
+    is the package name and {ver} its version.
+
+    :param path: The path to the wheel.
+    :param dest: Destination directory (default to current directory).
+    """
+    with WheelFile(path) as wf:
+        namever = wf.parsed_filename.group('namever')
+        destination = os.path.join(dest, namever)
+        print("Unpacking to: {}...".format(destination), end='')
+        sys.stdout.flush()
+        wf.extractall(destination)
+
+    print('OK')
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/metadata.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/metadata.py
new file mode 100644
index 00000000..ab0c07e5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/metadata.py
@@ -0,0 +1,141 @@
+"""
+Tools for converting old- to new-style metadata.
+"""
+
+import os.path
+import re
+import textwrap
+
+import pkg_resources
+
+from .pkginfo import read_pkg_info
+
+# Wheel itself is probably the only program that uses non-extras markers
+# in METADATA/PKG-INFO. Support its syntax with the extra at the end only.
+EXTRA_RE = re.compile(
+    r"""^(?P<package>.*?)(;\s*(?P<condition>.*?)(extra == '(?P<extra>.*?)')?)$""")
+
+
+def requires_to_requires_dist(requirement):
+    """Return the version specifier for a requirement in PEP 345/566 fashion."""
+    if getattr(requirement, 'url', None):
+        return " @ " + requirement.url
+
+    requires_dist = []
+    for op, ver in requirement.specs:
+        requires_dist.append(op + ver)
+    if not requires_dist:
+        return ''
+    return " (%s)" % ','.join(sorted(requires_dist))
+
+
+def convert_requirements(requirements):
+    """Yield Requires-Dist: strings for parsed requirements strings."""
+    for req in requirements:
+        parsed_requirement = pkg_resources.Requirement.parse(req)
+        spec = requires_to_requires_dist(parsed_requirement)
+        extras = ",".join(sorted(parsed_requirement.extras))
+        if extras:
+            extras = "[%s]" % extras
+        yield (parsed_requirement.project_name + extras + spec)
+
+
+def generate_requirements(extras_require):
+    """
+    Convert requirements from a setup()-style dictionary to ('Requires-Dist', 'requirement')
+    and ('Provides-Extra', 'extra') tuples.
+
+    extras_require is a dictionary of {extra: [requirements]} as passed to setup(),
+    using the empty extra {'': [requirements]} to hold install_requires.
+    """
+    for extra, depends in extras_require.items():
+        condition = ''
+        extra = extra or ''
+        if ':' in extra:  # setuptools extra:condition syntax
+            extra, condition = extra.split(':', 1)
+
+        extra = pkg_resources.safe_extra(extra)
+        if extra:
+            yield 'Provides-Extra', extra
+            if condition:
+                condition = "(" + condition + ") and "
+            condition += "extra == '%s'" % extra
+
+        if condition:
+            condition = ' ; ' + condition
+
+        for new_req in convert_requirements(depends):
+            yield 'Requires-Dist', new_req + condition
+
+
+def pkginfo_to_metadata(egg_info_path, pkginfo_path):
+    """
+    Convert .egg-info directory with PKG-INFO to the Metadata 2.1 format
+    """
+    pkg_info = read_pkg_info(pkginfo_path)
+    pkg_info.replace_header('Metadata-Version', '2.1')
+    # Those will be regenerated from `requires.txt`.
+    del pkg_info['Provides-Extra']
+    del pkg_info['Requires-Dist']
+    requires_path = os.path.join(egg_info_path, 'requires.txt')
+    if os.path.exists(requires_path):
+        with open(requires_path) as requires_file:
+            requires = requires_file.read()
+
+        parsed_requirements = sorted(pkg_resources.split_sections(requires),
+                                     key=lambda x: x[0] or '')
+        for extra, reqs in parsed_requirements:
+            for key, value in generate_requirements({extra: reqs}):
+                if (key, value) not in pkg_info.items():
+                    pkg_info[key] = value
+
+    description = pkg_info['Description']
+    if description:
+        pkg_info.set_payload(dedent_description(pkg_info))
+        del pkg_info['Description']
+
+    return pkg_info
+
+
+def pkginfo_unicode(pkg_info, field):
+    """Hack to coax Unicode out of an email Message() - Python 3.3+"""
+    text = pkg_info[field]
+    field = field.lower()
+    if not isinstance(text, str):
+        if not hasattr(pkg_info, 'raw_items'):  # Python 3.2
+            return str(text)
+        for item in pkg_info.raw_items():
+            if item[0].lower() == field:
+                text = item[1].encode('ascii', 'surrogateescape') \
+                    .decode('utf-8')
+                break
+
+    return text
+
+
+def dedent_description(pkg_info):
+    """
+    Dedent and convert pkg_info['Description'] to Unicode.
+    """
+    description = pkg_info['Description']
+
+    # Python 3 Unicode handling, sorta.
+    surrogates = False
+    if not isinstance(description, str):
+        surrogates = True
+        description = pkginfo_unicode(pkg_info, 'Description')
+
+    description_lines = description.splitlines()
+    description_dedent = '\n'.join(
+        # if the first line of long_description is blank,
+        # the first line here will be indented.
+        (description_lines[0].lstrip(),
+         textwrap.dedent('\n'.join(description_lines[1:])),
+         '\n'))
+
+    if surrogates:
+        description_dedent = description_dedent \
+            .encode("utf8") \
+            .decode("ascii", "surrogateescape")
+
+    return description_dedent
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pep425tags.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pep425tags.py
new file mode 100644
index 00000000..13b50731
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pep425tags.py
@@ -0,0 +1,185 @@
+"""Generate and work with PEP 425 Compatibility Tags."""
+
+import distutils.util
+import platform
+import sys
+import sysconfig
+import warnings
+
+try:
+    from importlib.machinery import get_all_suffixes
+except ImportError:
+    from imp import get_suffixes as get_all_suffixes
+
+
+def get_config_var(var):
+    try:
+        return sysconfig.get_config_var(var)
+    except IOError as e:  # pip Issue #1074
+        warnings.warn("{0}".format(e), RuntimeWarning)
+        return None
+
+
+def get_abbr_impl():
+    """Return abbreviated implementation name."""
+    impl = platform.python_implementation()
+    if impl == 'PyPy':
+        return 'pp'
+    elif impl == 'Jython':
+        return 'jy'
+    elif impl == 'IronPython':
+        return 'ip'
+    elif impl == 'CPython':
+        return 'cp'
+
+    raise LookupError('Unknown Python implementation: ' + impl)
+
+
+def get_impl_ver():
+    """Return implementation version."""
+    impl_ver = get_config_var("py_version_nodot")
+    if not impl_ver or get_abbr_impl() == 'pp':
+        impl_ver = ''.join(map(str, get_impl_version_info()))
+    return impl_ver
+
+
+def get_impl_version_info():
+    """Return sys.version_info-like tuple for use in decrementing the minor
+    version."""
+    if get_abbr_impl() == 'pp':
+        # as per https://github.com/pypa/pip/issues/2882
+        return (sys.version_info[0], sys.pypy_version_info.major,
+                sys.pypy_version_info.minor)
+    else:
+        return sys.version_info[0], sys.version_info[1]
+
+
+def get_flag(var, fallback, expected=True, warn=True):
+    """Use a fallback method for determining SOABI flags if the needed config
+    var is unset or unavailable."""
+    val = get_config_var(var)
+    if val is None:
+        if warn:
+            warnings.warn("Config variable '{0}' is unset, Python ABI tag may "
+                          "be incorrect".format(var), RuntimeWarning, 2)
+        return fallback()
+    return val == expected
+
+
+def get_abi_tag():
+    """Return the ABI tag based on SOABI (if available) or emulate SOABI
+    (CPython 2, PyPy)."""
+    soabi = get_config_var('SOABI')
+    impl = get_abbr_impl()
+    if not soabi and impl in ('cp', 'pp') and hasattr(sys, 'maxunicode'):
+        d = ''
+        m = ''
+        u = ''
+        if get_flag('Py_DEBUG',
+                    lambda: hasattr(sys, 'gettotalrefcount'),
+                    warn=(impl == 'cp')):
+            d = 'd'
+        if get_flag('WITH_PYMALLOC',
+                    lambda: impl == 'cp',
+                    warn=(impl == 'cp')):
+            m = 'm'
+        if get_flag('Py_UNICODE_SIZE',
+                    lambda: sys.maxunicode == 0x10ffff,
+                    expected=4,
+                    warn=(impl == 'cp' and
+                          sys.version_info < (3, 3))) \
+                and sys.version_info < (3, 3):
+            u = 'u'
+        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
+    elif soabi and soabi.startswith('cpython-'):
+        abi = 'cp' + soabi.split('-')[1]
+    elif soabi:
+        abi = soabi.replace('.', '_').replace('-', '_')
+    else:
+        abi = None
+    return abi
+
+
+def get_platform():
+    """Return our platform name 'win32', 'linux_x86_64'"""
+    # XXX remove distutils dependency
+    result = distutils.util.get_platform().replace('.', '_').replace('-', '_')
+    if result == "linux_x86_64" and sys.maxsize == 2147483647:
+        # pip pull request #3497
+        result = "linux_i686"
+    return result
+
+
+def get_supported(versions=None, supplied_platform=None):
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param versions: a list of string versions, of the form ["33", "32"],
+        or None. The first version will be assumed to support our ABI.
+    """
+    supported = []
+
+    # Versions must be given with respect to the preference
+    if versions is None:
+        versions = []
+        version_info = get_impl_version_info()
+        major = version_info[:-1]
+        # Support all previous minor Python versions.
+        for minor in range(version_info[-1], -1, -1):
+            versions.append(''.join(map(str, major + (minor,))))
+
+    impl = get_abbr_impl()
+
+    abis = []
+
+    abi = get_abi_tag()
+    if abi:
+        abis[0:0] = [abi]
+
+    abi3s = set()
+    for suffix in get_all_suffixes():
+        if suffix[0].startswith('.abi'):
+            abi3s.add(suffix[0].split('.', 2)[1])
+
+    abis.extend(sorted(list(abi3s)))
+
+    abis.append('none')
+
+    platforms = []
+    if supplied_platform:
+        platforms.append(supplied_platform)
+    platforms.append(get_platform())
+
+    # Current version, current API (built specifically for our Python):
+    for abi in abis:
+        for arch in platforms:
+            supported.append(('%s%s' % (impl, versions[0]), abi, arch))
+
+    # abi3 modules compatible with older version of Python
+    for version in versions[1:]:
+        # abi3 was introduced in Python 3.2
+        if version in ('31', '30'):
+            break
+        for abi in abi3s:   # empty set if not Python 3
+            for arch in platforms:
+                supported.append(("%s%s" % (impl, version), abi, arch))
+
+    # No abi / arch, but requires our implementation:
+    for i, version in enumerate(versions):
+        supported.append(('%s%s' % (impl, version), 'none', 'any'))
+        if i == 0:
+            # Tagged specifically as being cross-version compatible
+            # (with just the major version specified)
+            supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
+
+    # Major Python version + platform; e.g. binaries not using the Python API
+    for arch in platforms:
+        supported.append(('py%s' % (versions[0][0]), 'none', arch))
+
+    # No abi / arch, generic Python
+    for i, version in enumerate(versions):
+        supported.append(('py%s' % (version,), 'none', 'any'))
+        if i == 0:
+            supported.append(('py%s' % (version[0]), 'none', 'any'))
+
+    return supported
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pkginfo.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pkginfo.py
new file mode 100644
index 00000000..115be45b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/pkginfo.py
@@ -0,0 +1,43 @@
+"""Tools for reading and writing PKG-INFO / METADATA without caring
+about the encoding."""
+
+from email.parser import Parser
+
+try:
+    unicode
+    _PY3 = False
+except NameError:
+    _PY3 = True
+
+if not _PY3:
+    from email.generator import Generator
+
+    def read_pkg_info_bytes(bytestr):
+        return Parser().parsestr(bytestr)
+
+    def read_pkg_info(path):
+        with open(path, "r") as headers:
+            message = Parser().parse(headers)
+        return message
+
+    def write_pkg_info(path, message):
+        with open(path, 'w') as metadata:
+            Generator(metadata, mangle_from_=False, maxheaderlen=0).flatten(message)
+else:
+    from email.generator import BytesGenerator
+
+    def read_pkg_info_bytes(bytestr):
+        headers = bytestr.decode(encoding="ascii", errors="surrogateescape")
+        message = Parser().parsestr(headers)
+        return message
+
+    def read_pkg_info(path):
+        with open(path, "r",
+                  encoding="ascii",
+                  errors="surrogateescape") as headers:
+            message = Parser().parse(headers)
+        return message
+
+    def write_pkg_info(path, message):
+        with open(path, "wb") as out:
+            BytesGenerator(out, mangle_from_=False, maxheaderlen=0).flatten(message)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/util.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/util.py
new file mode 100644
index 00000000..0afb54a4
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/util.py
@@ -0,0 +1,46 @@
+import base64
+import io
+import sys
+
+
+if sys.version_info[0] < 3:
+    text_type = unicode  # noqa: F821
+
+    StringIO = io.BytesIO
+
+    def native(s, encoding='utf-8'):
+        if isinstance(s, unicode):
+            return s.encode(encoding)
+        return s
+else:
+    text_type = str
+
+    StringIO = io.StringIO
+
+    def native(s, encoding='utf-8'):
+        if isinstance(s, bytes):
+            return s.decode(encoding)
+        return s
+
+
+def urlsafe_b64encode(data):
+    """urlsafe_b64encode without padding"""
+    return base64.urlsafe_b64encode(data).rstrip(b'=')
+
+
+def urlsafe_b64decode(data):
+    """urlsafe_b64decode without padding"""
+    pad = b'=' * (4 - (len(data) & 3))
+    return base64.urlsafe_b64decode(data + pad)
+
+
+def as_unicode(s):
+    if isinstance(s, bytes):
+        return s.decode('utf-8')
+    return s
+
+
+def as_bytes(s):
+    if isinstance(s, text_type):
+        return s.encode('utf-8')
+    return s
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/wheelfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/wheelfile.py
new file mode 100644
index 00000000..ddf8509d
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site-packages/wheel/wheelfile.py
@@ -0,0 +1,169 @@
+from __future__ import print_function
+
+import csv
+import hashlib
+import os.path
+import re
+import stat
+import time
+from collections import OrderedDict
+from distutils import log as logger
+from zipfile import ZIP_DEFLATED, ZipInfo, ZipFile
+
+from wheel.cli import WheelError
+from wheel.util import urlsafe_b64decode, as_unicode, native, urlsafe_b64encode, as_bytes, StringIO
+
+# Non-greedy matching of an optional build number may be too clever (more
+# invalid wheel filenames will match). Separate regex for .dist-info?
+WHEEL_INFO_RE = re.compile(
+    r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.+?))(-(?P<build>\d[^-]*))?
+     -(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)\.whl$""",
+    re.VERBOSE)
+
+
+def get_zipinfo_datetime(timestamp=None):
+    # Some applications need reproducible .whl files, but they can't do this without forcing
+    # the timestamp of the individual ZipInfo objects. See issue #143.
+    timestamp = int(os.environ.get('SOURCE_DATE_EPOCH', timestamp or time.time()))
+    return time.gmtime(timestamp)[0:6]
+
+
+class WheelFile(ZipFile):
+    """A ZipFile derivative class that also reads SHA-256 hashes from
+    .dist-info/RECORD and checks any read files against those.
+    """
+
+    _default_algorithm = hashlib.sha256
+
+    def __init__(self, file, mode='r'):
+        basename = os.path.basename(file)
+        self.parsed_filename = WHEEL_INFO_RE.match(basename)
+        if not basename.endswith('.whl') or self.parsed_filename is None:
+            raise WheelError("Bad wheel filename {!r}".format(basename))
+
+        ZipFile.__init__(self, file, mode, compression=ZIP_DEFLATED, allowZip64=True)
+
+        self.dist_info_path = '{}.dist-info'.format(self.parsed_filename.group('namever'))
+        self.record_path = self.dist_info_path + '/RECORD'
+        self._file_hashes = OrderedDict()
+        self._file_sizes = {}
+        if mode == 'r':
+            # Ignore RECORD and any embedded wheel signatures
+            self._file_hashes[self.record_path] = None, None
+            self._file_hashes[self.record_path + '.jws'] = None, None
+            self._file_hashes[self.record_path + '.p7s'] = None, None
+
+            # Fill in the expected hashes by reading them from RECORD
+            try:
+                record = self.open(self.record_path)
+            except KeyError:
+                raise WheelError('Missing {} file'.format(self.record_path))
+
+            with record:
+                for line in record:
+                    line = line.decode('utf-8')
+                    path, hash_sum, size = line.rsplit(u',', 2)
+                    if hash_sum:
+                        algorithm, hash_sum = hash_sum.split(u'=')
+                        try:
+                            hashlib.new(algorithm)
+                        except ValueError:
+                            raise WheelError('Unsupported hash algorithm: {}'.format(algorithm))
+
+                        if algorithm.lower() in {'md5', 'sha1'}:
+                            raise WheelError(
+                                'Weak hash algorithm ({}) is not permitted by PEP 427'
+                                .format(algorithm))
+
+                        self._file_hashes[path] = (
+                            algorithm, urlsafe_b64decode(hash_sum.encode('ascii')))
+
+    def open(self, name_or_info, mode="r", pwd=None):
+        def _update_crc(newdata, eof=None):
+            if eof is None:
+                eof = ef._eof
+                update_crc_orig(newdata)
+            else:  # Python 2
+                update_crc_orig(newdata, eof)
+
+            running_hash.update(newdata)
+            if eof and running_hash.digest() != expected_hash:
+                raise WheelError("Hash mismatch for file '{}'".format(native(ef_name)))
+
+        ef = ZipFile.open(self, name_or_info, mode, pwd)
+        ef_name = as_unicode(name_or_info.filename if isinstance(name_or_info, ZipInfo)
+                             else name_or_info)
+        if mode == 'r' and not ef_name.endswith('/'):
+            if ef_name not in self._file_hashes:
+                raise WheelError("No hash found for file '{}'".format(native(ef_name)))
+
+            algorithm, expected_hash = self._file_hashes[ef_name]
+            if expected_hash is not None:
+                # Monkey patch the _update_crc method to also check for the hash from RECORD
+                running_hash = hashlib.new(algorithm)
+                update_crc_orig, ef._update_crc = ef._update_crc, _update_crc
+
+        return ef
+
+    def write_files(self, base_dir):
+        logger.info("creating '%s' and adding '%s' to it", self.filename, base_dir)
+        deferred = []
+        for root, dirnames, filenames in os.walk(base_dir):
+            # Sort the directory names so that `os.walk` will walk them in a
+            # defined order on the next iteration.
+            dirnames.sort()
+            for name in sorted(filenames):
+                path = os.path.normpath(os.path.join(root, name))
+                if os.path.isfile(path):
+                    arcname = os.path.relpath(path, base_dir)
+                    if arcname == self.record_path:
+                        pass
+                    elif root.endswith('.dist-info'):
+                        deferred.append((path, arcname))
+                    else:
+                        self.write(path, arcname)
+
+        deferred.sort()
+        for path, arcname in deferred:
+            self.write(path, arcname)
+
+    def write(self, filename, arcname=None, compress_type=None):
+        with open(filename, 'rb') as f:
+            st = os.fstat(f.fileno())
+            data = f.read()
+
+        zinfo = ZipInfo(arcname or filename, date_time=get_zipinfo_datetime(st.st_mtime))
+        zinfo.external_attr = (stat.S_IMODE(st.st_mode) | stat.S_IFMT(st.st_mode)) << 16
+        zinfo.compress_type = ZIP_DEFLATED
+        self.writestr(zinfo, data, compress_type)
+
+    def writestr(self, zinfo_or_arcname, bytes, compress_type=None):
+        ZipFile.writestr(self, zinfo_or_arcname, bytes, compress_type)
+        fname = (zinfo_or_arcname.filename if isinstance(zinfo_or_arcname, ZipInfo)
+                 else zinfo_or_arcname)
+        logger.info("adding '%s'", fname)
+        if fname != self.record_path:
+            hash_ = self._default_algorithm(bytes)
+            self._file_hashes[fname] = hash_.name, native(urlsafe_b64encode(hash_.digest()))
+            self._file_sizes[fname] = len(bytes)
+
+    def close(self):
+        # Write RECORD
+        if self.fp is not None and self.mode == 'w' and self._file_hashes:
+            data = StringIO()
+            writer = csv.writer(data, delimiter=',', quotechar='"', lineterminator='\n')
+            writer.writerows((
+                (
+                    fname,
+                    algorithm + "=" + hash_,
+                    self._file_sizes[fname]
+                )
+                for fname, (algorithm, hash_) in self._file_hashes.items()
+            ))
+            writer.writerow((format(self.record_path), "", ""))
+            zinfo = ZipInfo(native(self.record_path), date_time=get_zipinfo_datetime())
+            zinfo.compress_type = ZIP_DEFLATED
+            zinfo.external_attr = 0o664 << 16
+            self.writestr(zinfo, as_bytes(data.getvalue()))
+
+        ZipFile.close(self)
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/site.py b/.emacs.d.back/.python-environments/default/lib/python3.7/site.py
new file mode 100644
index 00000000..dc9887a9
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/site.py
@@ -0,0 +1,833 @@
+"""Append module search paths for third-party packages to sys.path.
+
+****************************************************************
+* This module is automatically imported during initialization. *
+****************************************************************
+
+In earlier versions of Python (up to 1.5a3), scripts or modules that
+needed to use site-specific modules would place ``import site''
+somewhere near the top of their code.  Because of the automatic
+import, this is no longer necessary (but code that does it still
+works).
+
+This will append site-specific paths to the module search path.  On
+Unix, it starts with sys.prefix and sys.exec_prefix (if different) and
+appends lib/python<version>/site-packages as well as lib/site-python.
+It also supports the Debian convention of
+lib/python<version>/dist-packages.  On other platforms (mainly Mac and
+Windows), it uses just sys.prefix (and sys.exec_prefix, if different,
+but this is unlikely).  The resulting directories, if they exist, are
+appended to sys.path, and also inspected for path configuration files.
+
+FOR DEBIAN, this sys.path is augmented with directories in /usr/local.
+Local addons go into /usr/local/lib/python<version>/site-packages
+(resp. /usr/local/lib/site-python), Debian addons install into
+/usr/{lib,share}/python<version>/dist-packages.
+
+A path configuration file is a file whose name has the form
+<package>.pth; its contents are additional directories (one per line)
+to be added to sys.path.  Non-existing directories (or
+non-directories) are never added to sys.path; no directory is added to
+sys.path more than once.  Blank lines and lines beginning with
+'#' are skipped. Lines starting with 'import' are executed.
+
+For example, suppose sys.prefix and sys.exec_prefix are set to
+/usr/local and there is a directory /usr/local/lib/python2.X/site-packages
+with three subdirectories, foo, bar and spam, and two path
+configuration files, foo.pth and bar.pth.  Assume foo.pth contains the
+following:
+
+  # foo package configuration
+  foo
+  bar
+  bletch
+
+and bar.pth contains:
+
+  # bar package configuration
+  bar
+
+Then the following directories are added to sys.path, in this order:
+
+  /usr/local/lib/python2.X/site-packages/bar
+  /usr/local/lib/python2.X/site-packages/foo
+
+Note that bletch is omitted because it doesn't exist; bar precedes foo
+because bar.pth comes alphabetically before foo.pth; and spam is
+omitted because it is not mentioned in either path configuration file.
+
+After these path manipulations, an attempt is made to import a module
+named sitecustomize, which can perform arbitrary additional
+site-specific customizations.  If this import fails with an
+ImportError exception, it is silently ignored.
+
+"""
+
+import os
+import sys
+
+try:
+    import __builtin__ as builtins
+except ImportError:
+    import builtins
+try:
+    set
+except NameError:
+    from sets import Set as set
+
+# Prefixes for site-packages; add additional prefixes like /usr/local here
+PREFIXES = [sys.prefix, sys.exec_prefix]
+# Enable per user site-packages directory
+# set it to False to disable the feature or True to force the feature
+ENABLE_USER_SITE = None
+# for distutils.commands.install
+USER_SITE = None
+USER_BASE = None
+
+_is_64bit = (getattr(sys, "maxsize", None) or getattr(sys, "maxint")) > 2 ** 32
+_is_pypy = hasattr(sys, "pypy_version_info")
+_is_jython = sys.platform[:4] == "java"
+if _is_jython:
+    ModuleType = type(os)
+
+
+def makepath(*paths):
+    dir = os.path.join(*paths)
+    if _is_jython and (dir == "__classpath__" or dir.startswith("__pyclasspath__")):
+        return dir, dir
+    dir = os.path.abspath(dir)
+    return dir, os.path.normcase(dir)
+
+
+def abs__file__():
+    """Set all module' __file__ attribute to an absolute path"""
+    for m in sys.modules.values():
+        if (_is_jython and not isinstance(m, ModuleType)) or hasattr(m, "__loader__"):
+            # only modules need the abspath in Jython. and don't mess
+            # with a PEP 302-supplied __file__
+            continue
+        f = getattr(m, "__file__", None)
+        if f is None:
+            continue
+        m.__file__ = os.path.abspath(f)
+
+
+def removeduppaths():
+    """ Remove duplicate entries from sys.path along with making them
+    absolute"""
+    # This ensures that the initial path provided by the interpreter contains
+    # only absolute pathnames, even if we're running from the build directory.
+    L = []
+    known_paths = set()
+    for dir in sys.path:
+        # Filter out duplicate paths (on case-insensitive file systems also
+        # if they only differ in case); turn relative paths into absolute
+        # paths.
+        dir, dircase = makepath(dir)
+        if not dircase in known_paths:
+            L.append(dir)
+            known_paths.add(dircase)
+    sys.path[:] = L
+    return known_paths
+
+
+# XXX This should not be part of site.py, since it is needed even when
+# using the -S option for Python.  See http://www.python.org/sf/586680
+def addbuilddir():
+    """Append ./build/lib.<platform> in case we're running in the build dir
+    (especially for Guido :-)"""
+    from distutils.util import get_platform
+
+    s = "build/lib.{}-{:.3}".format(get_platform(), sys.version)
+    if hasattr(sys, "gettotalrefcount"):
+        s += "-pydebug"
+    s = os.path.join(os.path.dirname(sys.path[-1]), s)
+    sys.path.append(s)
+
+
+def _init_pathinfo():
+    """Return a set containing all existing directory entries from sys.path"""
+    d = set()
+    for dir in sys.path:
+        try:
+            if os.path.isdir(dir):
+                dir, dircase = makepath(dir)
+                d.add(dircase)
+        except TypeError:
+            continue
+    return d
+
+
+def addpackage(sitedir, name, known_paths):
+    """Add a new path to known_paths by combining sitedir and 'name' or execute
+    sitedir if it starts with 'import'"""
+    if known_paths is None:
+        _init_pathinfo()
+        reset = 1
+    else:
+        reset = 0
+    fullname = os.path.join(sitedir, name)
+    try:
+        f = open(fullname, "r")
+    except IOError:
+        return
+    try:
+        for line in f:
+            if line.startswith("#"):
+                continue
+            if line.startswith("import"):
+                exec(line)
+                continue
+            line = line.rstrip()
+            dir, dircase = makepath(sitedir, line)
+            if not dircase in known_paths and os.path.exists(dir):
+                sys.path.append(dir)
+                known_paths.add(dircase)
+    finally:
+        f.close()
+    if reset:
+        known_paths = None
+    return known_paths
+
+
+def addsitedir(sitedir, known_paths=None):
+    """Add 'sitedir' argument to sys.path if missing and handle .pth files in
+    'sitedir'"""
+    if known_paths is None:
+        known_paths = _init_pathinfo()
+        reset = 1
+    else:
+        reset = 0
+    sitedir, sitedircase = makepath(sitedir)
+    if not sitedircase in known_paths:
+        sys.path.append(sitedir)  # Add path component
+    try:
+        names = os.listdir(sitedir)
+    except os.error:
+        return
+    names.sort()
+    for name in names:
+        if name.endswith(os.extsep + "pth"):
+            addpackage(sitedir, name, known_paths)
+    if reset:
+        known_paths = None
+    return known_paths
+
+
+def addsitepackages(known_paths, sys_prefix=sys.prefix, exec_prefix=sys.exec_prefix):
+    """Add site-packages (and possibly site-python) to sys.path"""
+    prefixes = [os.path.join(sys_prefix, "local"), sys_prefix]
+    if exec_prefix != sys_prefix:
+        prefixes.append(os.path.join(exec_prefix, "local"))
+
+    for prefix in prefixes:
+        if prefix:
+            if sys.platform in ("os2emx", "riscos") or _is_jython:
+                sitedirs = [os.path.join(prefix, "Lib", "site-packages")]
+            elif _is_pypy:
+                sitedirs = [os.path.join(prefix, "site-packages")]
+            elif sys.platform == "darwin" and prefix == sys_prefix:
+
+                if prefix.startswith("/System/Library/Frameworks/"):  # Apple's Python
+
+                    sitedirs = [
+                        os.path.join("/Library/Python", sys.version[:3], "site-packages"),
+                        os.path.join(prefix, "Extras", "lib", "python"),
+                    ]
+
+                else:  # any other Python distros on OSX work this way
+                    sitedirs = [os.path.join(prefix, "lib", "python" + sys.version[:3], "site-packages")]
+
+            elif os.sep == "/":
+                sitedirs = [
+                    os.path.join(prefix, "lib", "python" + sys.version[:3], "site-packages"),
+                    os.path.join(prefix, "lib", "site-python"),
+                    os.path.join(prefix, "python" + sys.version[:3], "lib-dynload"),
+                ]
+                lib64_dir = os.path.join(prefix, "lib64", "python" + sys.version[:3], "site-packages")
+                if os.path.exists(lib64_dir) and os.path.realpath(lib64_dir) not in [
+                    os.path.realpath(p) for p in sitedirs
+                ]:
+                    if _is_64bit:
+                        sitedirs.insert(0, lib64_dir)
+                    else:
+                        sitedirs.append(lib64_dir)
+                try:
+                    # sys.getobjects only available in --with-pydebug build
+                    sys.getobjects
+                    sitedirs.insert(0, os.path.join(sitedirs[0], "debug"))
+                except AttributeError:
+                    pass
+                # Debian-specific dist-packages directories:
+                sitedirs.append(os.path.join(prefix, "local/lib", "python" + sys.version[:3], "dist-packages"))
+                if sys.version[0] == "2":
+                    sitedirs.append(os.path.join(prefix, "lib", "python" + sys.version[:3], "dist-packages"))
+                else:
+                    sitedirs.append(os.path.join(prefix, "lib", "python" + sys.version[0], "dist-packages"))
+                sitedirs.append(os.path.join(prefix, "lib", "dist-python"))
+            else:
+                sitedirs = [prefix, os.path.join(prefix, "lib", "site-packages")]
+            if sys.platform == "darwin":
+                # for framework builds *only* we add the standard Apple
+                # locations. Currently only per-user, but /Library and
+                # /Network/Library could be added too
+                if "Python.framework" in prefix:
+                    home = os.environ.get("HOME")
+                    if home:
+                        sitedirs.append(os.path.join(home, "Library", "Python", sys.version[:3], "site-packages"))
+            for sitedir in sitedirs:
+                if os.path.isdir(sitedir):
+                    addsitedir(sitedir, known_paths)
+    return None
+
+
+def check_enableusersite():
+    """Check if user site directory is safe for inclusion
+
+    The function tests for the command line flag (including environment var),
+    process uid/gid equal to effective uid/gid.
+
+    None: Disabled for security reasons
+    False: Disabled by user (command line option)
+    True: Safe and enabled
+    """
+    if hasattr(sys, "flags") and getattr(sys.flags, "no_user_site", False):
+        return False
+
+    if hasattr(os, "getuid") and hasattr(os, "geteuid"):
+        # check process uid == effective uid
+        if os.geteuid() != os.getuid():
+            return None
+    if hasattr(os, "getgid") and hasattr(os, "getegid"):
+        # check process gid == effective gid
+        if os.getegid() != os.getgid():
+            return None
+
+    return True
+
+
+def addusersitepackages(known_paths):
+    """Add a per user site-package to sys.path
+
+    Each user has its own python directory with site-packages in the
+    home directory.
+
+    USER_BASE is the root directory for all Python versions
+
+    USER_SITE is the user specific site-packages directory
+
+    USER_SITE/.. can be used for data.
+    """
+    global USER_BASE, USER_SITE, ENABLE_USER_SITE
+    env_base = os.environ.get("PYTHONUSERBASE", None)
+
+    def joinuser(*args):
+        return os.path.expanduser(os.path.join(*args))
+
+    # if sys.platform in ('os2emx', 'riscos'):
+    #    # Don't know what to put here
+    #    USER_BASE = ''
+    #    USER_SITE = ''
+    if os.name == "nt":
+        base = os.environ.get("APPDATA") or "~"
+        if env_base:
+            USER_BASE = env_base
+        else:
+            USER_BASE = joinuser(base, "Python")
+        USER_SITE = os.path.join(USER_BASE, "Python" + sys.version[0] + sys.version[2], "site-packages")
+    else:
+        if env_base:
+            USER_BASE = env_base
+        else:
+            USER_BASE = joinuser("~", ".local")
+        USER_SITE = os.path.join(USER_BASE, "lib", "python" + sys.version[:3], "site-packages")
+
+    if ENABLE_USER_SITE and os.path.isdir(USER_SITE):
+        addsitedir(USER_SITE, known_paths)
+    if ENABLE_USER_SITE:
+        for dist_libdir in ("lib", "local/lib"):
+            user_site = os.path.join(USER_BASE, dist_libdir, "python" + sys.version[:3], "dist-packages")
+            if os.path.isdir(user_site):
+                addsitedir(user_site, known_paths)
+    return known_paths
+
+
+def setBEGINLIBPATH():
+    """The OS/2 EMX port has optional extension modules that do double duty
+    as DLLs (and must use the .DLL file extension) for other extensions.
+    The library search path needs to be amended so these will be found
+    during module import.  Use BEGINLIBPATH so that these are at the start
+    of the library search path.
+
+    """
+    dllpath = os.path.join(sys.prefix, "Lib", "lib-dynload")
+    libpath = os.environ["BEGINLIBPATH"].split(";")
+    if libpath[-1]:
+        libpath.append(dllpath)
+    else:
+        libpath[-1] = dllpath
+    os.environ["BEGINLIBPATH"] = ";".join(libpath)
+
+
+def setquit():
+    """Define new built-ins 'quit' and 'exit'.
+    These are simply strings that display a hint on how to exit.
+
+    """
+    if os.sep == ":":
+        eof = "Cmd-Q"
+    elif os.sep == "\\":
+        eof = "Ctrl-Z plus Return"
+    else:
+        eof = "Ctrl-D (i.e. EOF)"
+
+    class Quitter(object):
+        def __init__(self, name):
+            self.name = name
+
+        def __repr__(self):
+            return "Use {}() or {} to exit".format(self.name, eof)
+
+        def __call__(self, code=None):
+            # Shells like IDLE catch the SystemExit, but listen when their
+            # stdin wrapper is closed.
+            try:
+                sys.stdin.close()
+            except:
+                pass
+            raise SystemExit(code)
+
+    builtins.quit = Quitter("quit")
+    builtins.exit = Quitter("exit")
+
+
+class _Printer(object):
+    """interactive prompt objects for printing the license text, a list of
+    contributors and the copyright notice."""
+
+    MAXLINES = 23
+
+    def __init__(self, name, data, files=(), dirs=()):
+        self.__name = name
+        self.__data = data
+        self.__files = files
+        self.__dirs = dirs
+        self.__lines = None
+
+    def __setup(self):
+        if self.__lines:
+            return
+        data = None
+        for dir in self.__dirs:
+            for filename in self.__files:
+                filename = os.path.join(dir, filename)
+                try:
+                    fp = open(filename, "r")
+                    data = fp.read()
+                    fp.close()
+                    break
+                except IOError:
+                    pass
+            if data:
+                break
+        if not data:
+            data = self.__data
+        self.__lines = data.split("\n")
+        self.__linecnt = len(self.__lines)
+
+    def __repr__(self):
+        self.__setup()
+        if len(self.__lines) <= self.MAXLINES:
+            return "\n".join(self.__lines)
+        else:
+            return "Type %s() to see the full %s text" % ((self.__name,) * 2)
+
+    def __call__(self):
+        self.__setup()
+        prompt = "Hit Return for more, or q (and Return) to quit: "
+        lineno = 0
+        while 1:
+            try:
+                for i in range(lineno, lineno + self.MAXLINES):
+                    print(self.__lines[i])
+            except IndexError:
+                break
+            else:
+                lineno += self.MAXLINES
+                key = None
+                while key is None:
+                    try:
+                        key = raw_input(prompt)
+                    except NameError:
+                        key = input(prompt)
+                    if key not in ("", "q"):
+                        key = None
+                if key == "q":
+                    break
+
+
+def setcopyright():
+    """Set 'copyright' and 'credits' in __builtin__"""
+    builtins.copyright = _Printer("copyright", sys.copyright)
+    if _is_jython:
+        builtins.credits = _Printer("credits", "Jython is maintained by the Jython developers (www.jython.org).")
+    elif _is_pypy:
+        builtins.credits = _Printer("credits", "PyPy is maintained by the PyPy developers: http://pypy.org/")
+    else:
+        builtins.credits = _Printer(
+            "credits",
+            """\
+    Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands
+    for supporting Python development.  See www.python.org for more information.""",
+        )
+    here = os.path.dirname(os.__file__)
+    builtins.license = _Printer(
+        "license",
+        "See http://www.python.org/%.3s/license.html" % sys.version,
+        ["LICENSE.txt", "LICENSE"],
+        [os.path.join(here, os.pardir), here, os.curdir],
+    )
+
+
+class _Helper(object):
+    """Define the built-in 'help'.
+    This is a wrapper around pydoc.help (with a twist).
+
+    """
+
+    def __repr__(self):
+        return "Type help() for interactive help, " "or help(object) for help about object."
+
+    def __call__(self, *args, **kwds):
+        import pydoc
+
+        return pydoc.help(*args, **kwds)
+
+
+def sethelper():
+    builtins.help = _Helper()
+
+
+def aliasmbcs():
+    """On Windows, some default encodings are not provided by Python,
+    while they are always available as "mbcs" in each locale. Make
+    them usable by aliasing to "mbcs" in such a case."""
+    if sys.platform == "win32":
+        import locale, codecs
+
+        enc = locale.getdefaultlocale()[1]
+        if enc.startswith("cp"):  # "cp***" ?
+            try:
+                codecs.lookup(enc)
+            except LookupError:
+                import encodings
+
+                encodings._cache[enc] = encodings._unknown
+                encodings.aliases.aliases[enc] = "mbcs"
+
+
+def setencoding():
+    """Set the string encoding used by the Unicode implementation.  The
+    default is 'ascii', but if you're willing to experiment, you can
+    change this."""
+    encoding = "ascii"  # Default value set by _PyUnicode_Init()
+    if 0:
+        # Enable to support locale aware default string encodings.
+        import locale
+
+        loc = locale.getdefaultlocale()
+        if loc[1]:
+            encoding = loc[1]
+    if 0:
+        # Enable to switch off string to Unicode coercion and implicit
+        # Unicode to string conversion.
+        encoding = "undefined"
+    if encoding != "ascii":
+        # On Non-Unicode builds this will raise an AttributeError...
+        sys.setdefaultencoding(encoding)  # Needs Python Unicode build !
+
+
+def execsitecustomize():
+    """Run custom site specific code, if available."""
+    try:
+        import sitecustomize
+    except ImportError:
+        pass
+
+
+def virtual_install_main_packages():
+    f = open(os.path.join(os.path.dirname(__file__), "orig-prefix.txt"))
+    sys.real_prefix = f.read().strip()
+    f.close()
+    pos = 2
+    hardcoded_relative_dirs = []
+    if sys.path[0] == "":
+        pos += 1
+    if _is_jython:
+        paths = [os.path.join(sys.real_prefix, "Lib")]
+    elif _is_pypy:
+        if sys.version_info > (3, 2):
+            cpyver = "%d" % sys.version_info[0]
+        elif sys.pypy_version_info >= (1, 5):
+            cpyver = "%d.%d" % sys.version_info[:2]
+        else:
+            cpyver = "%d.%d.%d" % sys.version_info[:3]
+        paths = [os.path.join(sys.real_prefix, "lib_pypy"), os.path.join(sys.real_prefix, "lib-python", cpyver)]
+        if sys.pypy_version_info < (1, 9):
+            paths.insert(1, os.path.join(sys.real_prefix, "lib-python", "modified-%s" % cpyver))
+        hardcoded_relative_dirs = paths[:]  # for the special 'darwin' case below
+        #
+        # This is hardcoded in the Python executable, but relative to sys.prefix:
+        for path in paths[:]:
+            plat_path = os.path.join(path, "plat-%s" % sys.platform)
+            if os.path.exists(plat_path):
+                paths.append(plat_path)
+    elif sys.platform == "win32":
+        paths = [os.path.join(sys.real_prefix, "Lib"), os.path.join(sys.real_prefix, "DLLs")]
+    else:
+        paths = [os.path.join(sys.real_prefix, "lib", "python" + sys.version[:3])]
+        hardcoded_relative_dirs = paths[:]  # for the special 'darwin' case below
+        lib64_path = os.path.join(sys.real_prefix, "lib64", "python" + sys.version[:3])
+        if os.path.exists(lib64_path):
+            if _is_64bit:
+                paths.insert(0, lib64_path)
+            else:
+                paths.append(lib64_path)
+        # This is hardcoded in the Python executable, but relative to
+        # sys.prefix.  Debian change: we need to add the multiarch triplet
+        # here, which is where the real stuff lives.  As per PEP 421, in
+        # Python 3.3+, this lives in sys.implementation, while in Python 2.7
+        # it lives in sys.
+        try:
+            arch = getattr(sys, "implementation", sys)._multiarch
+        except AttributeError:
+            # This is a non-multiarch aware Python.  Fallback to the old way.
+            arch = sys.platform
+        plat_path = os.path.join(sys.real_prefix, "lib", "python" + sys.version[:3], "plat-%s" % arch)
+        if os.path.exists(plat_path):
+            paths.append(plat_path)
+    # This is hardcoded in the Python executable, but
+    # relative to sys.prefix, so we have to fix up:
+    for path in list(paths):
+        tk_dir = os.path.join(path, "lib-tk")
+        if os.path.exists(tk_dir):
+            paths.append(tk_dir)
+
+    # These are hardcoded in the Apple's Python executable,
+    # but relative to sys.prefix, so we have to fix them up:
+    if sys.platform == "darwin":
+        hardcoded_paths = [
+            os.path.join(relative_dir, module)
+            for relative_dir in hardcoded_relative_dirs
+            for module in ("plat-darwin", "plat-mac", "plat-mac/lib-scriptpackages")
+        ]
+
+        for path in hardcoded_paths:
+            if os.path.exists(path):
+                paths.append(path)
+
+    sys.path.extend(paths)
+
+
+def force_global_eggs_after_local_site_packages():
+    """
+    Force easy_installed eggs in the global environment to get placed
+    in sys.path after all packages inside the virtualenv.  This
+    maintains the "least surprise" result that packages in the
+    virtualenv always mask global packages, never the other way
+    around.
+
+    """
+    egginsert = getattr(sys, "__egginsert", 0)
+    for i, path in enumerate(sys.path):
+        if i > egginsert and path.startswith(sys.prefix):
+            egginsert = i
+    sys.__egginsert = egginsert + 1
+
+
+def virtual_addsitepackages(known_paths):
+    force_global_eggs_after_local_site_packages()
+    return addsitepackages(known_paths, sys_prefix=sys.real_prefix)
+
+
+def fixclasspath():
+    """Adjust the special classpath sys.path entries for Jython. These
+    entries should follow the base virtualenv lib directories.
+    """
+    paths = []
+    classpaths = []
+    for path in sys.path:
+        if path == "__classpath__" or path.startswith("__pyclasspath__"):
+            classpaths.append(path)
+        else:
+            paths.append(path)
+    sys.path = paths
+    sys.path.extend(classpaths)
+
+
+def execusercustomize():
+    """Run custom user specific code, if available."""
+    try:
+        import usercustomize
+    except ImportError:
+        pass
+
+
+def enablerlcompleter():
+    """Enable default readline configuration on interactive prompts, by
+    registering a sys.__interactivehook__.
+    If the readline module can be imported, the hook will set the Tab key
+    as completion key and register ~/.python_history as history file.
+    This can be overridden in the sitecustomize or usercustomize module,
+    or in a PYTHONSTARTUP file.
+    """
+
+    def register_readline():
+        import atexit
+
+        try:
+            import readline
+            import rlcompleter
+        except ImportError:
+            return
+
+        # Reading the initialization (config) file may not be enough to set a
+        # completion key, so we set one first and then read the file.
+        readline_doc = getattr(readline, "__doc__", "")
+        if readline_doc is not None and "libedit" in readline_doc:
+            readline.parse_and_bind("bind ^I rl_complete")
+        else:
+            readline.parse_and_bind("tab: complete")
+
+        try:
+            readline.read_init_file()
+        except OSError:
+            # An OSError here could have many causes, but the most likely one
+            # is that there's no .inputrc file (or .editrc file in the case of
+            # Mac OS X + libedit) in the expected location.  In that case, we
+            # want to ignore the exception.
+            pass
+
+        if readline.get_current_history_length() == 0:
+            # If no history was loaded, default to .python_history.
+            # The guard is necessary to avoid doubling history size at
+            # each interpreter exit when readline was already configured
+            # through a PYTHONSTARTUP hook, see:
+            # http://bugs.python.org/issue5845#msg198636
+            history = os.path.join(os.path.expanduser("~"), ".python_history")
+            try:
+                readline.read_history_file(history)
+            except OSError:
+                pass
+
+            def write_history():
+                try:
+                    readline.write_history_file(history)
+                except (FileNotFoundError, PermissionError):
+                    # home directory does not exist or is not writable
+                    # https://bugs.python.org/issue19891
+                    pass
+
+            atexit.register(write_history)
+
+    sys.__interactivehook__ = register_readline
+
+
+def main():
+    global ENABLE_USER_SITE
+    virtual_install_main_packages()
+    abs__file__()
+    paths_in_sys = removeduppaths()
+    if os.name == "posix" and sys.path and os.path.basename(sys.path[-1]) == "Modules":
+        addbuilddir()
+    if _is_jython:
+        fixclasspath()
+    GLOBAL_SITE_PACKAGES = not os.path.exists(os.path.join(os.path.dirname(__file__), "no-global-site-packages.txt"))
+    if not GLOBAL_SITE_PACKAGES:
+        ENABLE_USER_SITE = False
+    if ENABLE_USER_SITE is None:
+        ENABLE_USER_SITE = check_enableusersite()
+    paths_in_sys = addsitepackages(paths_in_sys)
+    paths_in_sys = addusersitepackages(paths_in_sys)
+    if GLOBAL_SITE_PACKAGES:
+        paths_in_sys = virtual_addsitepackages(paths_in_sys)
+    if sys.platform == "os2emx":
+        setBEGINLIBPATH()
+    setquit()
+    setcopyright()
+    sethelper()
+    if sys.version_info[0] == 3:
+        enablerlcompleter()
+    aliasmbcs()
+    setencoding()
+    execsitecustomize()
+    if ENABLE_USER_SITE:
+        execusercustomize()
+    # Remove sys.setdefaultencoding() so that users cannot change the
+    # encoding after initialization.  The test for presence is needed when
+    # this module is run as a script, because this code is executed twice.
+    if hasattr(sys, "setdefaultencoding"):
+        del sys.setdefaultencoding
+
+
+main()
+
+
+def _script():
+    help = """\
+    %s [--user-base] [--user-site]
+
+    Without arguments print some useful information
+    With arguments print the value of USER_BASE and/or USER_SITE separated
+    by '%s'.
+
+    Exit codes with --user-base or --user-site:
+      0 - user site directory is enabled
+      1 - user site directory is disabled by user
+      2 - uses site directory is disabled by super user
+          or for security reasons
+     >2 - unknown error
+    """
+    args = sys.argv[1:]
+    if not args:
+        print("sys.path = [")
+        for dir in sys.path:
+            print("    {!r},".format(dir))
+        print("]")
+
+        def exists(path):
+            if os.path.isdir(path):
+                return "exists"
+            else:
+                return "doesn't exist"
+
+        print("USER_BASE: {!r} ({})".format(USER_BASE, exists(USER_BASE)))
+        print("USER_SITE: {!r} ({})".format(USER_SITE, exists(USER_BASE)))
+        print("ENABLE_USER_SITE: %r" % ENABLE_USER_SITE)
+        sys.exit(0)
+
+    buffer = []
+    if "--user-base" in args:
+        buffer.append(USER_BASE)
+    if "--user-site" in args:
+        buffer.append(USER_SITE)
+
+    if buffer:
+        print(os.pathsep.join(buffer))
+        if ENABLE_USER_SITE:
+            sys.exit(0)
+        elif ENABLE_USER_SITE is False:
+            sys.exit(1)
+        elif ENABLE_USER_SITE is None:
+            sys.exit(2)
+        else:
+            sys.exit(3)
+    else:
+        import textwrap
+
+        print(textwrap.dedent(help % (sys.argv[0], os.pathsep)))
+        sys.exit(10)
+
+
+if __name__ == "__main__":
+    _script()
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/sre_compile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_compile.py
new file mode 120000
index 00000000..8df75bd7
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_compile.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/sre_compile.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/sre_constants.py b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_constants.py
new file mode 120000
index 00000000..c08169c1
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_constants.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/sre_constants.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/sre_parse.py b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_parse.py
new file mode 120000
index 00000000..481f82d8
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/sre_parse.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/sre_parse.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/stat.py b/.emacs.d.back/.python-environments/default/lib/python3.7/stat.py
new file mode 120000
index 00000000..5d1b6269
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/stat.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/stat.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/struct.py b/.emacs.d.back/.python-environments/default/lib/python3.7/struct.py
new file mode 120000
index 00000000..af494950
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/struct.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/struct.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/tarfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/tarfile.py
new file mode 120000
index 00000000..b7fa773b
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/tarfile.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/tarfile.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/tempfile.py b/.emacs.d.back/.python-environments/default/lib/python3.7/tempfile.py
new file mode 120000
index 00000000..570b0945
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/tempfile.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/tempfile.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/token.py b/.emacs.d.back/.python-environments/default/lib/python3.7/token.py
new file mode 120000
index 00000000..d67b104f
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/token.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/token.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/tokenize.py b/.emacs.d.back/.python-environments/default/lib/python3.7/tokenize.py
new file mode 120000
index 00000000..55e6050a
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/tokenize.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/tokenize.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/types.py b/.emacs.d.back/.python-environments/default/lib/python3.7/types.py
new file mode 120000
index 00000000..aa3096f5
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/types.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/types.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/warnings.py b/.emacs.d.back/.python-environments/default/lib/python3.7/warnings.py
new file mode 120000
index 00000000..8dd72e20
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/warnings.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/warnings.py
\ No newline at end of file
diff --git a/.emacs.d.back/.python-environments/default/lib/python3.7/weakref.py b/.emacs.d.back/.python-environments/default/lib/python3.7/weakref.py
new file mode 120000
index 00000000..c02784d3
--- /dev/null
+++ b/.emacs.d.back/.python-environments/default/lib/python3.7/weakref.py
@@ -0,0 +1 @@
+/usr/lib/python3.7/weakref.py
\ No newline at end of file
diff --git a/.emacs.d.back/LICENSE b/.emacs.d.back/LICENSE
new file mode 100644
index 00000000..e2006397
--- /dev/null
+++ b/.emacs.d.back/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Roger Gonzalez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/.emacs.d.back/README.md b/.emacs.d.back/README.md
new file mode 100644
index 00000000..cd829aeb
--- /dev/null
+++ b/.emacs.d.back/README.md
@@ -0,0 +1,40 @@
+# .emacs
+My .emacs file
+
+## How it looks
+![rogs-emacs-preview1](https://raw.githubusercontent.com/Rogergonzalez21/.emacs/master/demo1.png)
+![rogs-emacs-preview2](https://raw.githubusercontent.com/Rogergonzalez21/.emacs/master/demo2.png)
+
+## It uses:
+* [Web Mode](http://web-mode.org/)
+* [Emmet](https://github.com/smihica/emmet-mode)
+* [Powerline](https://github.com/milkypostman/powerline)
+* [NeoTree](https://github.com/jaypei/emacs-neotree)
+* [Magit](https://magit.vc/)
+* [Rainbow Mode](https://julien.danjou.info/projects/emacs-packages)
+* [WhiteSpace Cleanup](https://github.com/purcell/whitespace-cleanup-mode)
+* [Magit Gitflow](https://github.com/jtatarik/magit-gitflow)
+* [Autocomplete](https://github.com/auto-complete/auto-complete)
+* [FlyCheck](http://www.flycheck.org/en/latest/)
+* [YASnippets](https://github.com/joaotavora/yasnippet)
+* [Helm](https://github.com/emacs-helm/helm)
+* [Helm FlyCheck](https://github.com/yasuyk/helm-flycheck)
+* [PugMode](https://github.com/hlissner/emacs-pug-mode)
+* [Emojify](https://github.com/iqbalansari/emacs-emojify)
+* [Restclient](https://github.com/pashky/restclient.el)
+* [JS2 Mode](https://github.com/mooz/js2-mode)
+* [Projectile](https://github.com/bbatsov/projectile)
+* [Tern Mode](http://ternjs.net/doc/manual.html#emacs)
+* [Indium](https://github.com/NicolasPetton/Indium)
+* [RJSX Mode](https://github.com/felipeochoa/rjsx-mode)
+* [Multiple cursors mode](https://github.com/magnars/multiple-cursors.el)
+* [Prettier JS](https://github.com/prettier/prettier-emacs)
+* [Dockerfile mode](https://github.com/spotify/dockerfile-mode)
+* [Emacs Dashboard](https://github.com/emacs-dashboard/emacs-dashboard)
+* [Elpy](https://github.com/jorgenschaefer/elpy/blob/master/README.rst)
+* Some basic configurations
+
+## My Theme:
+* [Bliss](https://github.com/emacsfodder/emacs-bliss-theme/blob/master/bliss-theme.el)
+
+Feel free to check, use, copy and distribute this `init.el`. I'll try to update regularly
diff --git a/.emacs.d.back/bookmarks b/.emacs.d.back/bookmarks
new file mode 100644
index 00000000..86ea90cf
--- /dev/null
+++ b/.emacs.d.back/bookmarks
@@ -0,0 +1,20 @@
+;;;; Emacs Bookmark Format Version 1 ;;;; -*- coding: utf-8-emacs -*- 
+;;; This format is meant to be slightly human-readable;
+;;; nevertheless, you probably don't want to edit it.
+;;; -*- End Of Bookmark File Format Version Stamp -*-
+(("org-refile-last-stored"
+ (filename . "~/org/rogs.org")
+ (front-context-string . "** TODO Trabajar")
+ (rear-context-string . "20:46]\n   :END:\n")
+ (position . 9109))
+("org-capture-last-stored"
+ (filename . "~/Dropbox/org/personal.org")
+ (front-context-string . "*** TODO Ir al m")
+ (rear-context-string . "a con el dinero\n")
+ (position . 5550))
+("init.el"
+ (filename . "~/.emacs.d/init.el")
+ (front-context-string . ";;; init.el --- ")
+ (rear-context-string)
+ (position . 1))
+)
\ No newline at end of file
diff --git a/.emacs.d.back/core/rogs-core.el b/.emacs.d.back/core/rogs-core.el
new file mode 100644
index 00000000..fa2e48ac
--- /dev/null
+++ b/.emacs.d.back/core/rogs-core.el
@@ -0,0 +1,133 @@
+;;; rogs-core.el --- rogs default core configuration
+;;
+;;; Commentary:
+;;
+;; My core configuration
+;;
+;;; Code:
+
+;; Saves emacs backups in other folder
+(setq
+ backup-by-copying t              ; don't clobber symlinks
+ backup-directory-alist '(("." . "~/.emacs_backups"))    ; don't litter my fs tree
+ delete-old-versions t
+ kept-new-versions 6
+ kept-old-versions 2
+ version-control t)               ; use versioned backups
+
+;; Indent
+(setq web-mode-markup-indent-offset 2)
+(setq web-mode-css-indent-offset 2)
+(setq web-mode-code-indent-offset 2)
+(setq js-indent-level 2)
+(setq-default tab-width 2)
+(setq js-highlight-level 3)
+
+;; NeoTree
+(require 'neotree)
+(put 'upcase-region 'disabled nil)
+(put 'downcase-region 'disabled nil)
+
+;; Magit
+(require 'magit-gitflow)
+(add-hook 'magit-mode-hook 'turn-on-magit-gitflow)
+
+;; WhiteSpace Cleanup
+(global-whitespace-cleanup-mode)
+
+;; Auto revert mode (Updating buffers when changed on disk)
+(global-auto-revert-mode)
+
+;; All the icons
+(add-to-list 'load-path
+              "~/.emacs.d/packages/all-the-icons")
+(require 'all-the-icons)
+
+;; Dashboard
+(require 'dashboard)
+(dashboard-setup-startup-hook)
+(setq dashboard-startup-banner 'logo)
+(setq dashboard-items '((recents  . 5)
+                        (bookmarks . 5)
+                        (projects . 5)
+                        (agenda . 20)))
+(setq dashboard-set-heading-icons t)
+(setq dashboard-set-file-icons t)
+
+;; YASnippets
+(add-to-list 'load-path
+              "~/.emacs.d/plugins/yasnippet")
+(require 'yasnippet)
+(yas-global-mode 1)
+
+;; Helm configs
+(require 'helm-config)
+
+;; Helm flycheck
+(require 'helm-flycheck)
+
+;; HTTP Statuses for Helm
+(defvar helm-httpstatus-source
+  '((name . "HTTP STATUS")
+    (candidates . (("100 Continue") ("101 Switching Protocols")
+                   ("102 Processing") ("200 OK")
+                   ("201 Created") ("202 Accepted")
+                   ("203 Non-Authoritative Information") ("204 No Content")
+                   ("205 Reset Content") ("206 Partial Content")
+                   ("207 Multi-Status") ("208 Already Reported")
+                   ("300 Multiple Choices") ("301 Moved Permanently")
+                   ("302 Found") ("303 See Other")
+                   ("304 Not Modified") ("305 Use Proxy")
+                   ("307 Temporary Redirect") ("400 Bad Request")
+                   ("401 Unauthorized") ("402 Payment Required")
+                   ("403 Forbidden") ("404 Not Found")
+                   ("405 Method Not Allowed") ("406 Not Acceptable")
+                   ("407 Proxy Authentication Required") ("408 Request Timeout")
+                   ("409 Conflict") ("410 Gone")
+                   ("411 Length Required") ("412 Precondition Failed")
+                   ("413 Request Entity Too Large")
+                   ("414 Request-URI Too Large")
+                   ("415 Unsupported Media Type")
+                   ("416 Request Range Not Satisfiable")
+                   ("417 Expectation Failed") ("418 I'm a teapot")
+                   ("421 Misdirected Request")
+                   ("422 Unprocessable Entity") ("423 Locked")
+                   ("424 Failed Dependency") ("425 No code")
+                   ("426 Upgrade Required") ("428 Precondition Required")
+                   ("429 Too Many Requests")
+                   ("431 Request Header Fields Too Large")
+                   ("449 Retry with") ("500 Internal Server Error")
+                   ("501 Not Implemented") ("502 Bad Gateway")
+                   ("503 Service Unavailable") ("504 Gateway Timeout")
+                   ("505 HTTP Version Not Supported")
+                   ("506 Variant Also Negotiates")
+                   ("507 Insufficient Storage") ("509 Bandwidth Limit Exceeded")
+                   ("510 Not Extended")
+                   ("511 Network Authentication Required")))
+    (action . message)))
+
+(defun helm-httpstatus ()
+  (interactive)
+  (helm-other-buffer '(helm-httpstatus-source) "*helm httpstatus*"))
+
+;; Emojify
+(add-hook 'after-init-hook #'global-emojify-mode)
+
+;; RESTClient
+(require 'restclient)
+
+;; Multiple cursors mode
+(require 'multiple-cursors)
+
+;; Projectile mode
+(projectile-mode +1)
+
+;; PugMode
+(require 'pug-mode)
+
+;; Powerline
+(require 'powerline)
+(powerline-default-theme)
+
+(provide 'rogs-core)
+;;; rogs-core.el ends here
diff --git a/.emacs.d.back/core/rogs-custom.el b/.emacs.d.back/core/rogs-custom.el
new file mode 100644
index 00000000..41b9c91b
--- /dev/null
+++ b/.emacs.d.back/core/rogs-custom.el
@@ -0,0 +1,25 @@
+(custom-set-variables
+ ;; custom-set-variables was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ '(package-selected-packages
+   (quote
+    (dokuwiki-mode ox-pandoc org-bullets bliss-theme company-jedi elpy all-the-icons page-break-lines dashboard dockerfile-mode prettier-js add-node-modules-path stylus-mode yasnippet-snippets indium company-lsp lsp-ui lsp-mode yaml-mode mocha company-tern xref-js2 js2-refactor ac-js2 skewer-mode js2-mode coverage restclient emojify helm-flycheck pug-mode helm-swoop helm react-snippets yasnippet whitespace-cleanup-mode web-mode web-beautify scss-mode sass-mode rjsx-mode rainbow-mode rainbow-delimiters projectile project-explorer powerline nyan-mode neotree markdown-mode magit-gitflow kooten-theme json-mode jedi indent-guide geeknote flycheck exec-path-from-shell emmet-mode bundler aggressive-indent))))
+(custom-set-faces
+ ;; custom-set-faces was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ '(company-scrollbar-bg ((t (:background "dim gray"))))
+ '(company-scrollbar-fg ((t (:background "dark gray"))))
+ '(company-tooltip ((t (:background "black" :foreground "white"))))
+ '(company-tooltip-annotation ((t (:foreground "green"))))
+ '(company-tooltip-common ((t (:foreground "green"))))
+ '(company-tooltip-selection ((t (:background "dark green"))))
+ '(mode-line ((t (:foreground "#030303" :background "#2B6D02" :box nil))))
+ '(mode-line-buffer-id ((t (:foreground "#000000" :bold t))))
+ '(mode-line-inactive ((t (:foreground "#ffffff" :background "#5d6365" :box nil))))
+ '(powerline-active1 ((t (:foreground "#424242" :background "#75D85A" :box nil))))
+ '(powerline-active2 ((t (:foreground "#f9f9f9" :background "#398618" :box nil))))
+ '(powerline-arrow-shape (quote arrow)))
diff --git a/.emacs.d.back/core/rogs-keybindings.el b/.emacs.d.back/core/rogs-keybindings.el
new file mode 100644
index 00000000..dc240ae1
--- /dev/null
+++ b/.emacs.d.back/core/rogs-keybindings.el
@@ -0,0 +1,51 @@
+;;; keybindings.el --- rogs default keybindings configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for keybindings
+;;
+;;; Code:
+
+;; F5 = Goto line
+(global-set-key [f5] 'goto-line)
+
+;; F6 = browse-url-of-file
+(global-set-key [f6] 'browse-url-of-file)
+
+;; NeoTree
+(global-set-key [f8] 'neotree-toggle)
+
+;; Magit
+(global-set-key [f7] 'magit-status)
+
+;; Helm
+(with-eval-after-load "helm"
+(define-key helm-map (kbd "<tab>") 'helm-execute-persistent-action))
+
+(global-set-key (kbd "M-i") 'helm-swoop)
+(global-set-key (kbd "C-x b") 'helm-buffers-list)
+(global-set-key (kbd "C-x r b") 'helm-bookmarks)
+(global-set-key (kbd "M-x") 'helm-M-x)
+(global-set-key (kbd "M-y") 'helm-show-kill-ring)
+(global-set-key (kbd "C-x C-f") 'helm-find-files)
+
+;; Helm flycheck
+(eval-after-load 'flycheck
+  '(define-key flycheck-mode-map (kbd "C-c ! h") 'helm-flycheck))
+
+;; Multiple cursors mode
+(global-set-key (kbd "C-S-c C-S-c") 'mc/edit-lines)
+(global-set-key (kbd "C->") 'mc/mark-next-like-this)
+(global-set-key (kbd "C-<") 'mc/mark-previous-like-this)
+(global-set-key (kbd "C-c C-<") 'mc/mark-all-like-this)
+(define-key mc/keymap (kbd "<return>") nil)
+
+;; Projectile mode
+(define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map)
+
+;; Org mode
+(global-set-key "\C-ca" 'org-agenda)
+(global-set-key (kbd "<f12>") 'org-capture)
+
+(provide 'rogs-keybindings)
+;;; rogs-keybindings.el ends here
diff --git a/.emacs.d.back/core/rogs-packages.el b/.emacs.d.back/core/rogs-packages.el
new file mode 100644
index 00000000..6a757a6a
--- /dev/null
+++ b/.emacs.d.back/core/rogs-packages.el
@@ -0,0 +1,20 @@
+;;; packages.el --- rogs default package selection
+;;
+;;; Commentary:
+;;
+;; It shows the complete list of installed packages and auto-installs them if they are missing
+;;
+;;; Code:
+
+(require 'package)
+
+(add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/"))
+(add-to-list 'package-archives '("marmalade" . "http://marmalade-repo.org/packages/"))
+(add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t)
+(when (< emacs-major-version 24)
+  ;; For important compatibility libraries like cl-lib
+  (add-to-list 'package-archives '("gnu" . "http://elpa.gnu.org/packages/")))
+(package-initialize)
+
+(provide 'rogs-packages)
+;;; rogs-packages.el ends here
diff --git a/.emacs.d.back/core/rogs-ui.el b/.emacs.d.back/core/rogs-ui.el
new file mode 100644
index 00000000..cf8fde4c
--- /dev/null
+++ b/.emacs.d.back/core/rogs-ui.el
@@ -0,0 +1,63 @@
+;;; ui.el --- rogs default ui configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for UI
+;;
+;;; Code:
+
+;; Theme
+(load-theme 'bliss t)
+(set-frame-font "Source Code Pro Medium 11")
+
+;; Line number
+(global-linum-mode 1)
+(line-number-mode 1)
+
+;; Column number
+(column-number-mode 1)
+
+;; Parentesis highlight
+(show-paren-mode 1)
+
+;; NO scrollbar, NO toolbar NO menubar
+(scroll-bar-mode -1)
+(tool-bar-mode -1)
+(menu-bar-mode -1)
+(horizontal-scroll-bar-mode -1)
+
+;; Basic: Maximize Buffer
+(when (fboundp 'winner-mode)
+  (winner-mode 1))
+
+;; Electric pair mode
+(electric-pair-mode 1)
+(push '(?\' . ?\') electric-pair-pairs)
+(push '(?\` . ?\`) electric-pair-pairs)
+
+;; Removes mouse from code
+(mouse-avoidance-mode "animate")
+
+;; Selection highlight
+(delete-selection-mode 1)
+
+;; Basic: Turn off bugging yes-or-no-p
+(fset 'yes-or-no-p 'y-or-n-p)
+
+;; Tabs with spaces
+(setq-default indent-tabs-mode nil)
+
+;; Delete selection mode
+(delete-selection-mode 1)
+
+;; Wind move
+(windmove-default-keybindings 'meta)
+
+;; Start maximized
+(add-to-list 'default-frame-alist '(fullscreen . maximized))
+
+;; Overriding background color
+(set-background-color "black")
+
+(provide 'rogs-ui)
+;;; rogs-ui.el ends here
diff --git a/.emacs.d.back/demo1.png b/.emacs.d.back/demo1.png
new file mode 100644
index 00000000..4ad1b78e
--- /dev/null
+++ b/.emacs.d.back/demo1.png
diff --git a/.emacs.d.back/demo2.png b/.emacs.d.back/demo2.png
new file mode 100644
index 00000000..7ac055a2
--- /dev/null
+++ b/.emacs.d.back/demo2.png
diff --git a/.emacs.d.back/diary b/.emacs.d.back/diary
new file mode 100644
index 00000000..bda8df9b
--- /dev/null
+++ b/.emacs.d.back/diary
@@ -0,0 +1,1113 @@
+%%(and (diary-block 6 11 2019 6 11 2019)) :(
+%%(and (memq (calendar-day-of-week date) '(5 1 4 2 3)) (diary-cyclic 1 8 5 2019)) 12:00-12:30 CC - Daily Pincodes
+ Organizer: mailto:roger@rogs.me
+10/13/2019 10:44-11:44 Reunión con Sandra para apartamento
+10/5/2019 13:30-14:30 Viaje a Uruguay
+11/22/2019 19:44-22:44 Meetup Dribbble
+10/2/2019 18:30-19:30 Reunión con Papá y Pedro
+9/7/2019 10:30-13:30 Jornada veterinaria
+ Location: Pets Mall
+7/24/2019 17:00-18:00 Getting Started with AWS Lambda and Serverless Computing
+ Desc: Serverless computing means that you can build web, mobile, and IoT backends, run stream processing or big data workloads, run chatbots, and more, without the need for provisioning or managing servers. In this tech talk, learn how to get started with serverless computing with AWS Lambda, which lets you run code without provisioning or managing servers. We will introduce you to the basics of building with Lambda and its event-driven model. As part of that, we will show how you can benefit from features such as continuous scaling, built-in high availability, integrations with AWS and third-party apps, and subsecond metering pricing. We will also introduce you to the broader portfolio of AWS services that help you build serverless applications with Lambda, including Amazon SQS, Amazon API Gateway, Amazon DynamoDB, AWS Step Functions, and more.
+ 
+ Your login: http://cloudwebinaraws.adobeconnect.com/r6negz4a1xbd?login=roger@rogs.me&password=amazon
+ Location: Join using the link below
+%%(and (diary-cyclic 14 8 23 2019)) Mercado
+9/5/2019 11:30-12:30 Reunión con Ramiro
+4/10/2019 15:00-15:30 Meeting with Sarathi
+ Desc: meet.google.com/btp-pphe-soo
+ 
+%%(and (diary-block 9 2 2019 9 2 2019)) Viaje a embajada de Chile
+3/20/2019 12:30-13:00 Meeting with BlueTeam
+ Desc: 	
+ meet.google.com/cdp-wqyu-qpj
+%%(and (diary-block 10 18 2019 10 18 2019)) Azumo interview - Roger Gonzalez / Gerardo
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ No edite esta sección de la descripción.
+ 
+ Este evento tiene una videollamada.
+ Unirse: https://meet.google.com/rff-ghgw-niy
+ +1 631-743-5337 PIN: 604826333#
+ 
+ Consulta el evento en https://www.google.com/calendar/event?action=VIEW&eid=NDBwM29oaGVrOGU4MHBmMDBvbzRrdnAwYzQgcm9nZXJAcm9ncy5tZQ&tok=MTYjZ2VyYXJkb0BhenVtby5jbzZiN2IwYzgwOWM0ZTgwZmYwZmFjMDllNmFkNjA5YjIwZTIzNjI0MTc&ctz=America%2FArgentina%2FBuenos_Aires&hl=es_419&es=1.
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:roger@rogs.me
+8/22/2019 13:30-15:30 Almuerzo con Maria Eugenia
+ Location: Giannis
+11/1/2019 15:44-16:14 Entrevista con PedidosYa
+11/19/2019 10:44-11:44 Cita de Identificacion
+4/10/2019 18:00-19:00 Meeting with Juan (CocaCola)
+12/3/2019 15:44-16:44 Entrevista en PedidosYa
+ Location: Plaza Independencia 759, piso 6, Edificio Victoria Plaza, Raddison
+4/10/2019 14:30-15:00 QA Meeting
+ Desc: meet.google.com/stk-hfzg-btq
+ 
+8/23/2019 14:00-15:00 CC Pincodes | Desglose acciones Sprint 1
+ Desc: https://meet.google.com/fgp-gsmf-kup
+9/9/2019 11:00-11:30 Reunion de correos - Pincodes
+3/28/2019 12:30-13:30 Tech evaluation with Bluecoding
+ Desc: meet.google.com/pgz-xoez-ray
+8/29/2019 11:30-12:00 Cobrar a Saron
+ Location: Guerra Mendez
+4/12/2019 17:00-18:00 Interview with Genius Sports Group
+%%(and (diary-anniversary 9 21 2019))  Cumpleaños de Valentina Gomez
+%%(and (diary-cyclic 21 8 26 2019)) Lavanderia
+11/1/2019 10:44-11:14 Entrevista técnica en Azumo
+9/14/2019 09:30-10:30 Visitar cliente en Clínica Valencia Plaza
+7/25/2019 13:00-14:00 MySQL Options on AWS: Self-Managed, Managed, Serverless
+ Desc: In this tech talk, we will provide an overview of MySQL deployment options available on AWS, including self-managed (running MySQL yourself on Amazon EC2) and managed (running MySQL databases in Amazon RDS). We'll also cover the key differences between these options, and explain the range of managed options available with Amazon RDS for MySQL, Amazon RDS for MariaDB, and Amazon Aurora MySQL-compatible edition (including Aurora Serverless). You'll learn the basics of how to deploy, operate, scale, and monitor MySQL and MySQL-compatible databases using these services. Finally, we'll demonstrate how to easily deploy a serverless MySQL-compatible database instance using Aurora Serverless.
+ 
+ Your login: http://cloudwebinaraws.adobeconnect.com/r8vv2p2nfoy9?login=roger@rogs.me&password=amazon
+ Location: Join using the link below
+7/24/2019 13:00-14:00 Deep Dive on AWS Certificate Manager Private CA - Creating and Managing Root and Subordinate Certificate Authorities
+ Desc: AWS recently announced Root CA Hierarchies for ACM Private Certificate Authority (CA). CA administrators can now quickly and easily create a complete CA hierarchy, including root and subordinate CAs, with no need for external CAs. In this tech talk, we will provide an overview of ACM Private CA and some common use cases, such as issuing private certificates to identify devices. You will learn how to create a two level CA hierarchy and use it to issue private certificates. You will also learn some security best practices for creating and managing a CA hierarchy and have a chance to ask questions.
+ 
+ Your login: http://cloudwebinaraws.adobeconnect.com/r49gwbb4c5t6?login=roger@rogs.me&password=amazon
+ Location: Join using the link below
+3/18/2019 05:30-06:30 Reunión de coordinadores 
+ Location: PIBV
+3/18/2019 17:30-20:30 Reunion de Iglesia
+11/22/2019 19:44-22:14 Diseño y Desarrollo alineados a la experiencia de usuario
+ Desc: El próximo Viernes 22 de Noviembre tendremos una nueva edición de la Meetup de Dribbble con nuevo sponsor: Zepelin labs
+ 
+ El tema será: "Diseño y Desarrollo alineados a la experiencia de usuario"
+ 
+ Y como ya acostumbramos en la meetup de Dribbble estaremos compartiendo una charla y luego abriremos el espacio a un Design therapy en el cual compartiremos opiniones y experiencias sobre la charla.
+ 
+ Esta vez nuestra expositora será Teresita Ambrosio y ella nos cuenta lo siguiente sobre su charla:
+ 
+ "¿Quiénes se encargan de definir la experiencia de usuario? En esta próxima meetup hablaremos sobre cómo diseñadores y desarrolladores deben alinearse y entender las necesidades del usuario, siendo ambos equipos partícipes del proceso de diseño centrado en el usuario, evitando interferencias y trabajando para un mismo fin."
+ 
+ Los invitamos a estar atentos porque el 1ero de Noviembre abrimos las inscripciones para la meetup.
+ 
+ Si quieren mantenerse informados de todo lo que sucede en DribbbleMVD pueden seguirnos en redes
+ 
+ Tenemos Instagram, Twitter y Linkedin: @dribbblemvd
+ 
+ Nos vemos!
+ 
+ Details: https://www.meetup.com/dribbblemvd/events/265018289/
+ Location: Av Italia 6201, Montevideo, Uruguay
+8/12/2019 17:30-18:30 Reunion con Carlos sobre DB
+%%(and (diary-block 9 28 2019 9 28 2019)) Mudanza de Guataparo
+8/14/2019 13:30-15:00 Reunion con Maria Eugenia
+4/15/2019 12:00-12:30 Meeting with Andreas
+4/10/2019 12:30-13:00 Meeting with Sebastian Mejia
+ Location: Google chat
+%%(and (diary-cyclic 14 8 17 2019)) Barbería
+9/4/2019 20:00-21:00 Reunión Identidad Misional
+4/5/2019 11:30-12:00 Reunion con Massive
+ Desc: https://meet.google.com/zdy-isdu-zix
+12/19/2019 17:14-18:44 Reunion en Mercado Libre
+ Desc: Genial, te espera Fiorella Reyes en la torre 4, piso 39.
+ Jueves 19/12 a las 16:30
+ Location: WTC Torre 4, Piso 39
+11/8/2019 14:44-15:14 Entrevista de Valen
+6/6/2019 09:30-10:30 Reunion con Payever
+12/12/2019 18:14-19:44 Reunion con Mercado Libre
+ Desc: Te espero el miercoles (11/12) a las 17 horas. en WTC, Torre 1, piso 6, oficina 608
+11/8/2019 10:44-11:44 Entrevista en Azumo
+ Desc: meet.google.com/gud-fqqi-vgm
+8/21/2019 20:30-23:30 Despedida de Rossana Jaimes
+11/20/2019 19:44-22:44 ILA 19 Medellin
+11/3/2016 15:00-15:30 Meeting about Fwib with ChiTech 
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.d84rja17i3p5mj47ne9dq889ls?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Location: Hangouts Video Call
+ Organizer: mailto:rogergonzalez21@gmail.com
+2/29/2012 12:30-13:30 Asgn:Programación III, tarea
+ Desc: Tarea.  .
+ Location: Unitec Guacara
+6/7/2016 11:30-12:30 Interview position Analyst-Developer Python
+ Desc: 
+ 
+ -- Do not delete or change any of the following text. --
+ 
+ 
+ Join WebEx meeting<https://intercalleurope.webex.com/intercalleurope/j.php?MTID=m8268403325a0da8123a551a96b60c740>
+ Meeting number: 707 585 485
+ 
+ 
+ If you are the host, you can use the meeting host key to pass the host privilege to another participant or to start the meeting from a video conferencing system or application. To find the host key for this meeting, go here.<https://intercalleurope.webex.com/intercalleurope/j.php?MTID=ma47ef734358d85f11bdeca86f0f9196d>
+ 
+ Join by phone
+ Call-in number: +44-2078970111 (United Kingdom)
+ Show global numbers<https://www.tcconline.com/offSite/OffSiteController.jpf?cc=9812237878>
+ Conference Code: 981 223 7878
+ 
+ 
+ Can't join the meeting? Contact support.<https://intercalleurope.webex.com/intercalleurope/mc>
+ 
+ IMPORTANT NOTICE: Please note that this WebEx service allows audio and other information sent during the session to be recorded, which may be discoverable in a legal matter. By joining this session, you automatically consent to such recordings. If you do not consent to being recorded, discuss your concerns with the host or do not join the session..
+ 
+ 
+ 
+ Location: Skype for Business
+ Organizer: mailto:werner.dewever@eur.bosal.com
+6/15/2016 12:00-12:30 Reunión para Bot de Febeca
+ Desc: Reunión con Geovanny Espinoza para discutir sobre el Bot de Febeca. 
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.tqhcun3bicp8pa2c60b5s8j0fg?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+%%(and (diary-block 2 28 2012 2 28 2012)) Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+8/25/2018 10:30-11:30 Church meeting
+2/22/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+11/2/2016 18:00-19:00 Reunión de postulaciones en PIBV
+%%(and (diary-block 11 1 2015 11 1 2015)) Yolo Day
+1/31/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+8/27/2015 12:00-13:00 Entrevista en Deloitte
+ Desc: Preguntar por Nairoby Romero
+ Location: Av Bolivar Norte, Torre Venezuela, Piso 3, Oficinas A y D.
+7/14/2015 11:30-12:30 Reunión por Skype con OmegaSoftware
+%%(and (diary-block 5 30 2014 5 30 2014)) Tomates Fritos 
+ Location: El Baño Pub Bar
+2/17/2012 19:30-20:30 Asgn:Sistemas De Comunicación , actividad 3 - tipos...
+ Desc: Actividad 3 - Tipos de cables.  .
+ Location: Unitec Guacara
+1/27/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/9/2012 11:30-12:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 7
+ Desc: Examen corto 7.  .
+ Location: Unitec Guacara
+2/11/2017 09:00-14:00 Reunión de método inductivo de estudio bíblico 
+1/6/2016 14:00-14:30 Oferta económica
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/cleteci.com/carlos-rogergon?hceid=Y2FybG9zQGNsZXRlY2kuY29t.jf7nisn6fgetf6hch0164oom7o&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:carlos@cleteci.com
+9/29/2018 10:30-12:30 Meeting at church 
+1/31/2019 20:00-21:00 Borrar mahucityexpress.co.nz de SeoPro
+%%(and (diary-block 1 28 2017 1 28 2017)) Playa con Gabriella
+3/14/2012 14:30-18:30 Clss:Estadística II, no hubo clases - le...
+ Desc: No hubo clases - Leota no vino.  .
+ Location: Unitec Guacara
+%%(and (diary-cyclic 7 2 23 2013) (diary-block 2 23 2013 3 1 2013)) Hacer respaldo de nubes
+ Desc: Hacer respaldo de Google Drive a Dropbox y Mega.
+2/17/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+11/14/2015 12:00-13:30 Boda de Carlos y Evelyn
+ Location: Primera Iglesia Bautista de Valencia, Barrio P Alfonzo, Valencia 2001, Venezuela
+2/19/2012 19:30-20:30 Asgn:Introducción A Los Sistemas Operativos , practica 2 - llamad...
+ Desc: Practica 2 - Llamadas al API Win32.  .
+ Location: Unitec Guacara
+10/28/2012 20:30-21:30 Misfits
+ Desc: 4x02 Episode Two
+%%(and (diary-anniversary 8 25 2016))  Cumpleaños de Luz Rivas
+%%(and (diary-block 3 20 2017 3 20 2017)) Cancelar Spotify
+2/22/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+1/17/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+3/5/2012 01:30-02:30 Asgn:Introducción A Los Sistemas Operativos , práctica 4 - proces...
+ Desc: Práctica 4 - Procesos Concurrentes.  .
+ Location: Unitec Guacara
+2/24/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+2/26/2012 19:30-20:30 Asgn:Introducción A Los Sistemas Operativos , practica 3 - instal...
+ Desc: Practica 3 - Instalación de Linux.  .
+ Location: Unitec Guacara
+10/27/2018 12:00-13:00 Reunión Roger Gonzalez - Maureen - Asdrúbal
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.5qd5ku7ecalg6ms4skq5ll4ro8?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+4/1/2016 12:00-12:30 Roger Gonzalez - UV 
+ Desc: Ruby, Python programming language and Django Web Framework
+ Organizer: mailto:jsoubiate@uvsouthsourcing.com
+1/17/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+8/8/2016 20:30-22:30 Reunion
+ Desc: 
+ 
+ 
+ ENTRAR A UNA REUNIÓN DE WEBEX
+ https://mayores.webex.com/mayores/j.php?MTID=m54e37a083d4de877a5eecebb18138da0
+ Número de la reunión (código de acceso): 733 570 731
+ Contraseña de la reunión: WPDe28pi
+ 
+ 
+ ENTRAR MEDIANTE EL TELÉFONO
+ 1-877-668-4493 Número de llamada entrante gratuito (EE. UU./Canadá) 
+ 1-650-479-3208 Número de llamada entrante pago (EE. UU./Canadá)
+ 
+ Números de llamada globales:
+ https://mayores.webex.com/mayores/globalcallin.php?serviceType=MC&ED=499923162&tollFree=1
+ 
+ Restricciones de marcado gratuito: 
+ https://www.webex.com/pdf/tollfree_restrictions.pdf
+ 
+ 
+ 
+ ¿No puede entrar a la reunión?
+ https://help.webex.com/docs/DOC-5412
+ 
+ 
+ AVISO IMPORTANTE: Tenga en cuenta que este servicio de WebEx permite enviar audio y otra información durante la sesión que se grabará, lo que podría traer problemas de divulgación durante una confrontación legal. Al entrar en esta reunión, automáticamente otorga permiso para realizar dichas grabaciones. Si no otorga consentimiento para ser grabado, debata estos asuntos con el organizador o no entre a la sesión.
+ 
+ Location: https://mayores.webex.com/mayores
+ Organizer: mailto:gmurgolo@mayorbeval.com
+7/15/2015 10:30-11:30 Videoconferencia con Felipe de Willty
+9/23/2015 16:30-17:30 Entrevista en Hotel Hesperia
+ Desc: Preguntar por Fran Bello
+ Location: Hesperia WTC Valencia, Av. Salvador Feo la Cruz, naguanagua, Av 168 Salvador Feo La Cruz, Valencia 02005, Venezuela
+1/27/2012 12:30-13:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 1
+ Desc: Examen corto 1.  .
+ Location: Unitec Guacara
+%%(and (diary-cyclic 7 8 2 2018) (diary-block 8 2 2018 8 16 2018)) 19:30-23:30 Premarriage with Ricardo
+9/16/2016 10:00-10:30 Reunión con Febeca
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.6st21jlmvdh2ojht6scpkld6s8?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+%%(and (diary-anniversary 7 22 2017))  Cumpleaños de Chachi
+3/28/2012 14:30-18:30 Clss:Estadística II, no hubo clases - le...
+ Desc: No hubo clases - Leota no vino..  .
+ Location: Unitec Guacara
+9/3/2015 12:00-13:00 Entrevista con Delloite
+ Desc: Preguntar por Andreina Lopez
+8/23/2014 15:30-18:30 Reunión de Salvavidas 
+%%(and (diary-anniversary 5 12 2016))  Cumpleaños de Harold Martinez
+%%(and (diary-cyclic 7 10 5 2016) (diary-block 10 5 2016 5 10 2017)) 20:00-22:00 Célula de jóvenes
+10/24/2016 19:00-19:30 30 Minute Meeting with Daniela Rodriguez
+ Desc: Event Name: 30 Minute Meeting
+ Date & Time: 06:00pm - 06:30pm (GMT-04:00 Caracas Time) on Monday, October 24, 2016
+ 
+ Cancel this event:
+ https://calendly.com/cancellations/GDACOPTK25SZ77ZS
+ Reschedule this event:
+ https://calendly.com/reschedulings/GDACOPTK25SZ77ZS
+ 
+11/14/2015 18:30-19:30 Casa de Raquel
+9/23/2016 16:00-16:30 Reunión SiliacaBot
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.sfp83c0msl8nilg2is8qbqv11g?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+%%(and (diary-block 6 23 2016 6 23 2016)) Cumpleaños de María Eugenia Cedeño
+9/28/2016 11:30-12:30 Apoyo en Implementación Fotos BOT
+ Desc: Buenas tardes, 
+ 
+ Se pauta reunión para compartir información sobre apoyo en solicitud de implementación de Fotos BOT para el Mayor Sillaca.
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/mayoreo.biz/jrosario?hceid=anJvc2FyaW9AbWF5b3Jlby5iaXo.1num02u2e46gt4ki5iq3m6op38&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Location: Sala de Sistemas 2
+ Organizer: mailto:jrosario@mayoreo.biz
+%%(and (diary-block 11 1 2014 11 1 2014)) Yolo day
+%%(and (diary-anniversary 1 15 2019))  Aniversario con Gabriella
+3/6/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+4/21/2017 17:00-20:00 Evento de PowerPoint 
+3/23/2012 11:30-13:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+2/16/2017 18:30-19:30 Reunión con Darío 
+2/15/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+3/20/2012 19:30-23:30 Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+9/5/2016 10:00-11:00 Reunión Febeca
+1/18/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+12/15/2015 21:30-22:30 Entrevista técnica 
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/cleteci.com/carlos-jose-lez?hceid=Y2FybG9zQGNsZXRlY2kuY29t.paliu2jnst87dldk2jq3mtk16o&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:carlos@cleteci.com
+3/9/2012 12:30-14:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+5/11/2016 18:30-20:30 Charla Informativa IESA
+ Location: Centro Comercial Prebo, Valencia, Carabobo, Venezuela
+2/1/2012 15:30-16:30 Quiz:Estadística II, quiz 1 - tarea
+ Desc: Quiz 1 - Tarea.  .
+ Location: Unitec Guacara
+%%(and (not (diary-date 8 2 2018)) (memq (calendar-day-of-week date) '(4 5)) (diary-block 8 2 2018 8 16 2018)) 08:30-13:30 Class in EBV
+2/11/2019 14:00-15:00 Reunión Programma
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.ccojgp9n6dij2bb66sqj6b9k6ko3ab9oc9hj8b9l6dj36o9o6dhm6o9j74?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+1/4/2016 20:30-21:30 Entrevista telefonica con Cleteci
+1/25/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+2/26/2017 12:30-13:30 Predicación 
+2/28/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+2/28/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+8/9/2018 18:00-20:00 Meeting with David Falloon (seopronz)
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.cks3cp1i6phjgb9m68rmab9kc4rm4b9o6dhm8b9g64rm8c1gc4pjichhck?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+11/11/2014 15:30-16:30 Tesis unitec , revisión aplicación
+ Desc: Tesis Unitec - Abrante , Gonzales 
+ Organizer: mailto:abrantemanuel@gmail.com
+3/16/2012 11:30-13:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+3/6/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/2/2012 01:30-02:30 Asgn:Introducción A Los Sistemas Operativos , puntos extra - subi...
+ Desc: Puntos extra - Subir mi foto de perfil .  .
+ Location: Unitec Guacara
+3/19/2013 08:30-13:30 Cita de pasaporte
+2/10/2012 12:30-14:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+3/2/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+12/3/2015 12:30-13:30 Reunión de Analiticas Web - Noviembre
+ Desc: Reunión para discutir los resultados de las analíticas del mes de noviembre.
+ Location: SofOS, 4 Avenidas, Valencia 2001, Venezuela
+ Organizer: mailto:rogergonzalez21@gmail.com
+3/4/2019 11:00-11:30 Programma - Pixel2HTML
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/aGVybmFuZGV6Z21hdXJlZW5wQGdtYWlsLmNvbQ.ofogldmt0h43b5k3grsq7r2j5o?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:hernandezgmaureenp@gmail.com
+2/29/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-block 3 8 2012 3 8 2012)) Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+3/19/2012 00:30-01:30 Asgn:Introducción A Los Sistemas Operativos , practica 7 - planif...
+ Desc: Practica 7 - Planificación del CPU.  .
+ Location: Unitec Guacara
+11/26/2015 20:30-21:30 Reunión con la junta comunal
+ Location: Residencias Tauro
+ Organizer: mailto:rogergonzalez21@gmail.com
+2/21/2012 10:30-14:30 Clss:Sistemas De Comunicación , feriado - no hubo c...
+ Desc: Feriado - No hubo clases.  .
+ Location: Unitec Guacara
+2/8/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+10/25/2016 18:00-19:00 Reunión con Mariano
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.edta7p4ko8skg8bek6odah3i30?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+12/4/2018 17:00-18:00 Meeting Diseño Programma Group
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.2d9a2j49gbhmtto36i20oouv6n?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+5/26/2016 15:00-16:00 Reunión sobre bot de Telegram
+ Desc: Videollamada sobre el bot de Telegram.
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.mmde7mhm99phrb668h9gd6i24o?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+3/28/2012 09:30-13:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+1/26/2017 14:00-18:00 Cita en el alergólogo 
+2/17/2012 18:30-19:30 Asgn:Introducción A Los Sistemas Operativos , puntos extra - acti...
+ Desc: Puntos extra - Actividad en clase.  .
+ Location: Unitec Guacara
+1/27/2017 18:00-19:00 Reunión por página web de Iglesia El Trigal
+3/15/2012 19:30-23:30 Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+2/7/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+2/17/2013 19:30-22:30 Concierto Youth Beta
+ Location: PIBV
+1/31/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+8/16/2014 11:30-12:30 Arreglar computadora de William
+2/22/2012 12:30-13:30 Quiz:Programación III, segundo examen corto
+ Desc: Segundo examen corto.  .
+ Location: Unitec Guacara
+%%(and (diary-block 4 5 2013 4 5 2013)) Lan Party
+ Location: Casa de la abuela
+%%(and (diary-block 12 15 2015 12 15 2015)) Cumpleaños de Wini
+2/10/2012 12:30-13:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 3
+ Desc: Examen corto 3.  .
+ Location: Unitec Guacara
+11/7/2016 19:00-20:00 Meeting with Heine from FwiB
+ Desc: Meeting to talk about FwiB version 2
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.fs0cgrc0med3l94ojba9ic08lk?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+3/23/2012 09:30-11:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+5/18/2016 10:00-11:00 Interview Roger Gonzalez - position Analyst-Developer Python
+ Desc: Hi Roger,
+ Indicated time is 9PM CET... should be 3PM your time.
+ Best regards
+ Werner
+ 
+ Location: Skype (werner.de.wever)
+ Organizer: mailto:werner.dewever@outlook.com
+2/1/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-block 11 13 2015 11 13 2015)) Firma del libro de Ingeniero
+ Location: UNITEC Guacara
+11/4/2015 09:30-11:30 Cita con el Oftalmólogo
+10/19/2015 10:00-11:30 Revisión proyectos Web
+ Desc:    -          Revisión de generador de tarjetas de presentación
+    -          Definición de proyecto piloto para el site corporativo
+ 
+ 
+ Location: Torre Ejecutiva
+ Organizer: mailto:jorge.lopez@sofoscorp.com
+11/12/2015 16:30-18:00 Búsqueda de Talento Humano por RRSS
+ Desc: Estimados,
+ 
+ 
+ Es necesario discutir la estrategia en redes sociales para la búsqueda de talento humano para la empresa, de manera que se optimice el proceso.
+ 
+ 
+ Espero contar con su asistencia.
+ 
+ 
+ Saludos,
+ Ma. Eugenia Cedeño
+ Estratega de Redes Sociales y Medios Electrónicos
+ Location: Sala de Reuniones Secundaria - Torre Ejecutiva
+ Organizer: mailto:maria.cedeno@sofoscorp.com
+%%(and (diary-block 5 4 2017 5 4 2017)) Ir al oftalmólogo
+3/1/2019 13:30-14:00 Pre-meeting Programma
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.6sp62phjc8o3ab9jc4sm4b9kc4pmabb174o3ebb575ijachh64rjidpm6o?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+7/13/2015 10:30-11:30 Reunión telefónica con GSG
+%%(and (diary-block 11 5 2017 11 5 2017)) Cobrar a Gaby por la blusa
+3/13/2012 09:30-13:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+3/21/2012 14:30-18:30 Clss:Estadística II, no hubo clases - le...
+ Desc: No hubo clases - Leota no vino.  .
+ Location: Unitec Guacara
+3/13/2012 12:30-13:30 Quiz:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+10/28/2018 17:00-18:00 Reunión con Asdrúbal 
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.61i66pj56cojib9gcpgm2b9k69h3ibb1coq38b9pccoj2cj4c5j36cpj70?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+3/13/2012 14:30-16:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/30/2012 09:30-11:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-block 4 20 2017 4 20 2017)) Cancelar Spotify
+%%(and (diary-block 11 29 2014 11 29 2014)) Suena Caracas
+ Organizer: mailto:rogergonzalez21@gmail.com
+2/24/2012 12:30-14:30 Clss:Estadística II, no hubo clases
+ Desc: No hubo clases.  .
+ Location: Unitec Guacara
+11/22/2016 18:00-19:00 Reunión con Vascar
+3/28/2013 19:30-23:00 Casa de Daniela 
+ Location: Casa de Daniela
+3/16/2012 10:30-11:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 8
+ Desc: Examen corto 8.  .
+ Location: Unitec Guacara
+11/5/2015 11:00-13:00 Revisión de analíticas del website en Octubre
+ Desc: Revisaremos el comportamiento de las visitas al website y los contenidos más visitados durante del mes de Octubre para tomar futuras decisiones en cuanto a línea editorial y cambios en el website.
+ 
+ Location: Oficina del Sr. Jorge
+ Organizer: mailto:maria.cedeno@sofoscorp.com
+2/17/2012 12:30-13:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 4
+ Desc: Examen corto 4.  .
+ Location: Unitec Guacara
+%%(and (diary-block 4 16 2016 4 16 2016)) Tributo a Pink Floyd
+ Location: Asociacion De Ganaderos, guaparo, Venezuela
+2/21/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos , feriado - no hubo c...
+ Desc: Feriado - No hubo clases.  .
+ Location: Unitec Guacara
+%%(and (diary-cyclic 7 5 10 2017) (diary-block 5 10 2017 9 27 2017)) 19:30-20:30 Culto de oración
+ Location: Primera Iglesia Bautista de Valencia, Valencia 2001, Carabobo, Venezuela
+%%(and (diary-block 11 30 2015 11 30 2015)) Acto de grado de Ingeniero
+3/12/2012 00:30-01:30 Asgn:Introducción A Los Sistemas Operativos , práctica 5 - hilos ...
+ Desc: Práctica 5 - Hilos de la clase "Thread" e interfaz "Runnable".  .
+ Location: Unitec Guacara
+11/23/2014 19:30-20:30 Ir a Casa de Aldrymar
+ Desc:  
+%%(and (diary-block 11 4 2016 11 4 2016)) Cita con el Oftalmólogo
+3/13/2012 19:30-23:30 Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+%%(and (diary-block 8 4 2018 8 4 2018)) Angelonal inauguration
+1/29/2018 12:00-12:30 Presentación de expedientes de inscripción en el Registro Civil
+ Organizer: mailto:unknownorganizer@calendar.google.com
+10/15/2016 10:00-11:00 Reunión sobre negocio en Praga
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.1mloiep8jduns3ojshmrh78h7c?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+12/19/2016 13:30-14:00 Priceless Specials - ReGroup
+ Desc: 
+ .........................................................................................................................................
+ --> Join Skype Meeting<https://meet.mastercard.com/cristina.paslar/ZPHUI603>
+   This is an online meeting for Skype for Business, the professional meetings and communications app formerly known as Lync.
+ Join by phone
+ 1-636-722-2222 USA-Canada Local-Caller Paid<tel:1-636-722-2222%20USA-Canada%20Local-Caller%20Paid> (United States)              English (United States)
+ 1-816-713-4466 USA-Canada Local-Caller Paid<tel:1-816-713-4466%20USA-Canada%20Local-Caller%20Paid> (United States)              English (United States)
+ 1-844-802-4805 USA-Canada Toll Free<tel:1-844-802-4805%20USA-Canada%20Toll%20Free> (United States)              English (United States)
+ Find a local number<https://dialin.mastercard.com>
+ 
+ Conference ID: 851928
+  Forgot your dial-in PIN?<https://dialin.mastercard.com> |Help<http://www.mastercard.com/UCHelp/>
+ 
+ [http://www.mastercard.com/UCHelp/images/logo_mastercard.jpg]
+ If you do not use the link above or are dialing into this meeting you can simply hit pound (#) three times after entering the conference id and wait for the host to start the conference.  There is no requirement to identify yourself to join the meeting.
+ [!OC([1033])!]
+ .........................................................................................................................................
+ 
+ CONFIDENTIALITY NOTICE This e-mail message and any attachments are only for the use of the intended recipient and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient, any disclosure, distribution or other use of this e-mail message or attachments is prohibited. If you have received this e-mail message in error, please delete and notify the sender immediately. Thank you.
+ 
+ Location: Skype Meeting
+ Organizer: mailto:cristina.paslar@mastercard.com
+5/28/2017 14:30-18:30 Comida con las muchachas de SofOS
+3/23/2012 10:30-11:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 9
+ Desc: Examen corto 9.  .
+ Location: Unitec Guacara
+2/12/2012 19:30-20:30 Asgn:Introducción A Los Sistemas Operativos , practica 1 - interr...
+ Desc: Practica 1 - Interrupciones y Servicios BIOS..  .
+ Location: Unitec Guacara
+2/19/2019 08:30-09:30 Comienzo de vitaminas
+1/24/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+4/12/2012 01:00-02:00 Asgn:Introducción A Los Sistemas Operativos , practica 10 - synch...
+ Desc: Practica 10 - Synchronized en Java.  .
+ Location: Unitec Guacara
+11/11/2016 15:00-15:30 Validación de Inglés - Roger González (Backend developer)
+ Desc: Roger González 
+ N° 0412-466-1220
+ Email: rogergonzalez21@gmail.com
+ Link: https://ve.linkedin.com/in/rogergonzalez21/en
+ 
+ Blas Atencio
+ N° 0414-222-0355
+ Email: blas.atencio@gmail.com
+ 
+ 
+ Organizer: mailto:kimberleymaluenga@gmail.com
+3/14/2012 09:30-13:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+3/26/2012 01:15-02:15 Asgn:Introducción A Los Sistemas Operativos , practica 8 - sincro...
+ Desc: Practica 8 - Sincronización de procesos..  .
+ Location: Unitec Guacara
+12/29/2018 13:00-14:00 Gabriella's birthday
+3/22/2012 19:30-23:30 Clss:Java Módulo 1, no fui por evento c...
+ Desc: No fui por evento cultural..  .
+ Location: Unitec Valencia
+%%(and (diary-block 2 15 2018 2 15 2018)) Terminar de pagar la laptop
+%%(and (diary-cyclic 7 7 22 2014) (diary-block 7 22 2014 7 29 2014)) 14:30-16:30 Inteligencia de Negocios. Osmel Brito Bigott
+ Desc: Hola,
+ 
+ Osmel Brito-Bigott actualizó esta reunión de WebEx:
+ 
+ Inteligencia de Negocios. Osmel Brito Bigott 
+ Todos los Martes, desde mar, 22 de jul de 2014 hasta mar, 29 de jul de 2014, 1:30 p.m. | 2 h (actualizado)
+ 
+ La Paz (Sudamérica Occidental  Hora, GMT-04:00) 
+ Organizador: Osmel Brito-Bigott
+ 
+ Cuando sea el momento, únase a la reunión desde aquí:
+ https://meetings.webex.com/collabs/meetings/join?uuid=M50QL5NSVSF92SO02MHL4111RE-AQON
+ 
+ Agenda 
+ Esta reunión no tiene una agenda.
+ 
+ Información de acceso
+ Dónde: WebEx en línea 
+ Número de reunión: 195 437 870
+ Contraseña de la reunión: No es necesaria una contraseña para esta reunión. 
+ 
+ Conexión de audio 
+ +1-415-655-0001 US TOLL
+ Código de acceso: 195 437 870
+ 
+ 
+ 
+ 
+ 
+ ¿No puede acceder a su reunión? Obtenga ayuda:
+ https://meetings.webex.com/collabs/#/support
+ 
+ 
+ Proporcionando el poder de la colaboración
+ Cisco WebEx Equipo
+ 
+ -----------------------------------------------------------
+ 
+ AVISO IMPORTANTE: Este servicio de WebEx incluye una función que permite ver e intercambiar audio, documentos y otros materiales durante la reunión que va a grabarse. Al entrar a esta reunión, automáticamente da permiso para realizar dichas grabaciones. Si no otorga permiso para la grabación, analice sus inquietudes con el organizador de la reunión antes de que comience la grabación; de lo contrario, no se una a la reunión. Tenga en cuenta que estas grabaciones pueden estar sujetas a divulgación en caso de litigio.
+ 
+ ©2014 Cisco o sus filiales. Todos los derechos reservados.
+ 
+ MT-A-005
+ 
+ Location: WebEx en línea
+ Organizer: mailto:osmel.b@datanalitica.com
+9/17/2015 10:30-11:30 Entrevista en SofOS
+ Desc: Piso 15. Preguntar por el señor Jorge Lopez
+ Location: SofOS, 4 Avenidas, Valencia 2001, Venezuela
+3/12/2012 00:30-01:30 Asgn:Introducción A Los Sistemas Operativos , practica 6 - applet
+ Desc: Practica 6 - Applet.  .
+ Location: Unitec Guacara
+3/2/2012 12:30-14:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+9/28/2015 18:00-19:00 Consultoría con Industrias Humbert
+ Location: Videoconferencia
+11/22/2016 13:00-14:00 Reunión con Vascar
+9/3/2015 15:30-16:30 Entrevista en SofOS
+ Desc: Reda Building, piso #5 Preguntar por Celestina Trebol
+ Location: SofOS, 4 Avenidas, Valencia 2001, Venezuela
+1/18/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+2/28/2019 13:00-14:00 Buy .dev from Google Domains
+ Desc: Visit https://domains.google/TLD/dev
+2/24/2012 12:30-13:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 5
+ Desc: Examen corto 5.  .
+ Location: Unitec Guacara
+3/16/2012 09:30-11:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-block 9 15 2017 9 15 2017)) Cumpleaños de Ricardo Reverón
+2/15/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+6/26/2015 11:00-12:00 Reunión sobre postulación como desarrollador Full-Stack
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/mobydev.com/full-stack-2606?hceid=bWFydGluQG1vYnlkZXYuY29t.arm3g0uuuvupk91r0m3lbst8u0&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:martin@mobydev.com
+1/25/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+3/9/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+12/30/2015 20:30-21:30 Entrevista técnica
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/cleteci.com/entrevista-t?hceid=Y2FybG9zQGNsZXRlY2kuY29t.81j0sv8sibqrte868bb2hpjrr8&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:carlos@cleteci.com
+3/23/2018 11:00-13:00 Reunion en Bonchona
+ Location: Bonchona 107.1 FM, Calle 137, Valencia 2001, Carabobo, Venezuela
+3/4/2016 18:30-19:30 Salvavidas
+2/7/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/18/2012 19:30-20:30 Asgn:Sistemas De Comunicación , actividad 5 - subre...
+ Desc: Actividad 5 - Subredes.  .
+ Location: Unitec Guacara
+2/23/2013 21:30-23:30 Ir a casa de Nelson a hacer lo de CADIVI
+ Location: Casa de Nelson
+2/1/2012 12:30-13:30 Quiz:Programación III, primer examen corto
+ Desc: Primer examen corto .  .
+ Location: Unitec Guacara
+2/27/2019 08:30-09:30 Segunda tanda de desparasitación 
+5/14/2016 09:30-13:30 Planificación Escuela Bíblica de Vacaciones
+ Location: Primera Iglesia Bautista de Valencia, Barrio P Alfonzo, Valencia 2001, Carabobo, Venezuela
+2/6/2012 19:30-20:30 Asgn:Sistemas De Comunicación , actividad 2 - magni...
+ Desc: Actividad 2 - Magnitudes electricas.  .
+ Location: Unitec Guacara
+2/14/2012 15:30-17:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/27/2012 09:30-13:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-cyclic 1 3 29 2019) (diary-block 3 29 2019 3 31 2019))  Corotofest
+6/18/2016 09:00-13:00 Reunión de planificación Escuela Bíblica
+ Location: Primera Iglesia Bautista de Valencia, Barrio P Alfonzo, Valencia 2001, Carabobo, Venezuela
+2/1/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+1/24/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+11/3/2016 12:00-12:30 Reunión de BevalBot
+ Desc: Reunión para discutir sobre funcionamiento de BevalBot
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.fnntjg28nisjvkma3807t45rqc?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+11/10/2016 18:00-19:00 Reunión de la Coordinadora PIBV
+2/29/2012 15:30-19:30 Clss:Estadística II, no hubo clases. leo...
+ Desc: No hubo clases. Leota no vino.  .
+ Location: Unitec Guacara
+3/7/2012 10:30-14:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+3/21/2012 09:30-13:30 Clss:Programación III
+ Desc: .  .
+ Location: Unitec Guacara
+3/27/2012 14:30-16:30 Clss:Introducción A Los Sistemas Operativos , no hubo clases
+ Desc: No hubo clases.  .
+ Location: Unitec Guacara
+3/2/2012 11:30-12:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 6
+ Desc: Examen corto 6.  .
+ Location: Unitec Guacara
+3/2/2012 11:30-12:30 Asgn:Introducción A Los Sistemas Operativos , puntos extra - acti...
+ Desc: Puntos extra - Actividad en clase.  .
+ Location: Unitec Guacara
+5/6/2014 15:30-18:30 Viene el Técnico de Inter 
+ Location: Home
+5/30/2016 18:00-19:00 Entrevista con Argentina
+11/11/2016 20:00-21:00 Reunión sobre FwiB
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/calendar/cm9nZXJnb256YWxlejIxQGdtYWlsLmNvbQ.6sr3id3570q3gb9ncdj3ib9kclhj0b9oclhmcb9n6sqjid32chhm2or26c?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:rogergonzalez21@gmail.com
+11/15/2016 19:00-20:00 Entrevista con Roger González (Backend Developer)
+ Desc: Roger González
+ Skype: rogergonzalez21.
+ Email:rogergonzalez21@gmail.com
+ Organizer: mailto:kimberleymaluenga@gmail.com
+2/8/2012 15:30-19:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+3/7/2012 15:30-19:30 Clss:Estadística II, no hubo clases - le...
+ Desc: No hubo clases - Leota no como.  .
+ Location: Unitec Guacara
+3/30/2012 10:30-11:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 10
+ Desc: Examen corto 10.  .
+ Location: Unitec Guacara
+2/15/2019 15:00-16:00 Reunión programma propuesta
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.768c0tdpma5hsdeaavviup4i9o?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+3/20/2012 14:30-16:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+12/17/2016 08:00-13:00 Visita al hospital
+1/20/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+4/12/2012 01:00-02:00 Asgn:Introducción A Los Sistemas Operativos , practica 9 - semáfo...
+ Desc: Practica 9 - Semáforos en Java.  .
+ Location: Unitec Guacara
+10/6/2016 18:30-19:30 Reunión de Cuerpo Diaconal
+3/2/2012 13:30-14:30 Asgn:Estadística II, practica - examen
+ Desc: Practica - Examen.  .
+ Location: Unitec Guacara
+%%(and (diary-block 3 6 2012 3 6 2012)) Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+3/20/2012 09:30-13:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+2/15/2012 15:30-16:30 Quiz:Estadística II, quiz 2 - taller
+ Desc: Quiz 2 - Taller.  .
+ Location: Unitec Guacara
+2/14/2012 10:30-14:30 Clss:Sistemas De Comunicación
+ Desc: .  .
+ Location: Unitec Guacara
+11/12/2015 19:00-20:00 Reunión con Dario Ortega
+ Location: Primera Iglesia Bautista de Valencia, Barrio P Alfonzo, Valencia 2001, Venezuela
+ Organizer: mailto:rogergonzalez21@gmail.com
+2/19/2012 19:30-20:30 Asgn:Sistemas De Comunicación , actividad 4 - recon...
+ Desc: Actividad 4 - Reconocer dispositivos de Red.  .
+ Location: Unitec Guacara
+%%(and (diary-cyclic 14 5 31 2014) (diary-block 5 31 2014 7 26 2014)) 11:00-12:00 Legislación y Ética. PDG-TP1. Osmel Brito Bigott
+ Desc: Hola,
+ 
+ Osmel Brito-Bigott lo invita a esta reunión de WebEx.
+ 
+ Legislación y Ética. PDG-TP1. Osmel Brito Bigott
+ Cada 2 semanas el Sábado desde sáb, 31 de may de 2014 a sáb, 26 de jul de 2014, 10:00 a.m. | 1 h
+ 
+ La Paz (Sudamérica Occidental  Hora, GMT-04:00)
+ Organizador: Osmel Brito-Bigott
+ 
+ Cuando sea el momento, únase a la reunión desde aquí:
+ https://meetings.webex.com/collabs/meetings/join?uuid=M93ZZQSOQMGLODY5XKEJ6X3ENL-AQON
+ 
+ Agenda
+ Esta reunión no tiene una agenda.
+ 
+ Información de acceso
+ Dónde: WebEx en línea
+ Número de reunión: 192 017 634
+ Contraseña de la reunión: No es necesaria una contraseña para esta reunión.
+ 
+ Conexión de audio
+ +1-415-655-0001 US TOLL
+ Código de acceso: 192 017 634
+ 
+ 
+ 
+ 
+ 
+ ¿No puede acceder a su reunión? Obtenga ayuda:
+ https://meetings.webex.com/collabs/#/support
+ 
+ 
+ Proporcionando el poder de la colaboración
+ Cisco WebEx Equipo
+ 
+ -----------------------------------------------------------
+ 
+ AVISO IMPORTANTE: Este servicio de WebEx incluye una función que permite ver e intercambiar audio, documentos y otros materiales durante la reunión que va a grabarse. Al entrar a esta reunión, automáticamente da permiso para realizar dichas grabaciones. Si no otorga permiso para la grabación, analice sus inquietudes con el organizador de la reunión antes de que comience la grabación; de lo contrario, no se una a la reunión. Tenga en cuenta que estas grabaciones pueden estar sujetas a divulgación en caso de litigio.
+ 
+ ©2014 Cisco o sus filiales. Todos los derechos reservados.
+ 
+ MT-A-001
+ 
+ Location: WebEx en línea
+ Organizer: mailto:osmel.b@datanalitica.com
+6/26/2016 10:30-11:30 Reunión salón temático
+2/3/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+3/30/2012 11:30-13:30 Clss:Estadística II
+ Desc: .  .
+ Location: Unitec Guacara
+9/8/2018 10:00-11:00 Reunion de postulacion
+11/19/2014 18:30-19:30 Buscar el cargador de la laptop
+%%(and (diary-block 3 1 2012 3 1 2012)) Clss:Java Módulo 1
+ Desc: .  .
+ Location: Unitec Valencia
+9/1/2016 10:00-11:00 Febeca-Beval Bot
+ Desc: Hola Róger, cómo estás ? gusto en saludarte
+ 
+            Primero que nada me gustaría saber si estamos al día con los pagos ?, segundo estamos por cambiar el tema de las imágenes del bot, para que se lean directamente de la base de datos, nos podrías apoyar con este tema, que necesarias(requerimientos), y cual sería tu propuesta de implementación y económica.
+ 
+ De antemano agradecido con tu apoya, en espera de tus comentarios
+ 
+ Slds
+ 
+ El 26 de agosto de 2016, 19:52, Roger Gonzalez <rogergonzalez21@gmail.com> escribió:
+ >
+ > Buenas noches.
+ >
+ > El dia de hoy culminó el tiempo de espera para el pago del desarrollo de FebecaBot, por lo que he desactivado el bot. FebecaBot será restablecido en cuanto se concrete el pago. Esta condición se encuent...
+ 
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://plus.google.com/hangouts/_/mayoreo.biz/finalizaci-n?hceid=Z2VzcGlub3phQG1heW9yZW8uYml6.64q9bforg0ihotmv2ho1ffl0do&hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:gespinoza@mayoreo.biz
+2/21/2019 10:00-10:30 Meeting with Number8's Manager: Oliver
+ Location: Skype: live:oliver_6451
+2/20/2019 15:00-16:00 RingCentral 60-minute meeting 
+ Desc: Hi there,
+ 
+ 
+ Emiliano Leon is inviting you to a scheduled Zoom meeting.
+ 
+ 
+ https://meetings.ringcentral.com/j/9700885521
+ 
+ View original email thread here: https://mxmx.me/2TrqLZY
+ 
+ To cancel or reschedule, visit this link: https://mxmx.me/ESr45nr
+ 
+ Scheduled with Mixmax (mixmax.com)
+ Location: https://meetings.ringcentral.com/j/9700885521
+ Organizer: mailto:emiliano@dreamitjobs.net
+5/10/2014 16:00-22:30 Fiesta de Ivanna 
+ Location: Iglesia San Antonio
+2/10/2012 10:30-12:30 Clss:Introducción A Los Sistemas Operativos
+ Desc: .  .
+ Location: Unitec Guacara
+%%(and (diary-date 1 15 t) (diary-block 1 15 2018 1 15 2019)) 18:00-19:00 Aniversario con Gabriella
+2/23/2019 09:00-10:00 Reunion programma
+ Desc: -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Please do not edit this section of the description.
+ 
+ This event has a Google Hangouts video call.
+ Join: https://hangouts.google.com/hangouts/_/calendar/YXNkcnViYWwuaXZhbi5zdWFyZXoucml2ZXJhQGdtYWlsLmNvbQ.7i7livti6ln7rv2mgo58b1lss8?hs=121
+ -::~:~::~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~:~::~:~::-
+ Organizer: mailto:asdrubal.ivan.suarez.rivera@gmail.com
+4/7/2016 12:00-12:30 Entrevista con Roger Gonzalez - Python Dev
+ Location: Skype
+ Organizer: mailto:florencia.alvarez@bairesdev.com
+2/3/2012 12:30-13:30 Quiz:Introducción A Los Sistemas Operativos , examen corto 2
+ Desc: Examen corto 2.  .
+ Location: Unitec Guacara
+%%(and (diary-block 8 28 2019 8 28 2019)) Salida con Amanda 
+12/26/2019 15:00-15:45 gigi-45min with Gigi Debiasi
+ Desc: 
+ meet.google.com/wcz-upuq-juf
+ Event Name: gigi-45min
+ Date &amp; Time: 03:00pm - 03:45pm (Buenos Aires Time) on Thursday, December 26, 2019
+ 
+ Do you use Zoom for video-calls?: No
+ If not, what video-call tool do you prefer to use?: Hangouts
+ 
+ Need to make changes to this event?
+ Cancel: https://calendly.com/cancellations/HGMJQLJEPD6R4DMH
+ Reschedule: https://calendly.com/reschedulings/HGMJQLJEPD6R4DMH
+8/24/2019 10:30-11:30 Pets Mall 
+11/7/2019 18:59-21:44 Segunda MIS.uy 2019
+ Desc: MIS.uy - Meetups de Ingeniería de Software del Uruguay
+ Thursday, November 7 at 5:15 PM
+ 
+ Por ahora... andá reservando la fecha. Brindaremos detalles en unas pocas semanas.
+ 
+ https://www.meetup.com/MIS-uy/events/265567346/
+ Location: CodigoDelSur (Av 19 de Abril 3465, Montevideo, Uruguay 11700)
+10/23/2019 20:44-23:44 JS Internacional ( 🇧🇷) y local ( 🇺🇾)
+ Desc: The Montevideo Javascript Meetup Group
+ Wednesday, October 23 at 7:00 PM
+ 
+ Este mes tenemos, para combatir el frio que se vino, nos visitan de Brasil y nos traen un charla de JS sobre performance, además estamos buscando a al...
+ 
+ https://www.meetup.com/montevideojs/events/265672334/
+ Location: Rootstrap (Sarandí 690, Montevideo, DE, Uruguay 11000)
+10/31/2019 19:44-22:44 Kickoff - Primer Montevideo Developer Circle Meetup!!
+ Desc: Facebook Developer Circle - Montevideo
+ Thursday, October 31 at 7:00 PM
+ 
+ Bienvenidos al Primer Montevideo Developer Circle! Somos una comunidad abierta con el respaldo de Facebook, en los que queremos compartir conocimiento...
+ 
+ https://www.meetup.com/Developer-Circle-Montevideo/events/265910557/
+ Location: Sinergia Cowork World Trade Center (Av. Dr. Luis Alberto de Herrera 1248, Montevideo, DE, Uruguay 11300)
+11/6/2019 19:44-21:59 La colaboración funciona: Tejiendo nuestra propia realidad
+ Desc: Mujeres en UX UY
+ Wednesday, November 6 at 7:00 PM
+ 
+ ¡Bienvenidas a la comunidad de +Mujeres UX de Uruguay! Nuestro cuarto encuentro será el próximo 6 de Noviembre en Xmart Labs (Bulevar España 2565). En...
+ 
+ https://www.meetup.com/Mujeres-en-UX-UY/events/266081229/
+ Location: Bulevar España 2565 (Bulevar España 2565, Montevideo, DE, Uruguay 11300)
+11/26/2019 19:44-22:44 ATDD, calidad desde la especificación
+ Desc: AgileUY
+ Tuesday, November 26 at 7:00 PM
+ 
+ ATDD - Acceptance Test Driven Development: aprenderemos como desde el momento de la definición de las historias de usuario estaremos poniendo foco en ...
+ 
+ https://www.meetup.com/AgileUY/events/266553679/
+12/5/2019 19:44-22:44 asado.js v3.0.0 - Despedida 2019!
+ Desc: Lugar: WyeWorks
+ 
+ José Agustín Iturriaga 3359, 11300 Montevideo, Departamento de Montevideo
+ 
+ Se termina el año, y lo despedimos con un asado de la comunidad de JS para festejar que logramos 1 meetup por mes y como comunidad somos un poco más grande!
+ 
+ Si querés dar una charla mandala al slack de Open Web Uruguay en el canal #meetup-js o con un comentario en este evento.
+ 
+ Se cobra un "cubierto artístico" de $300 (o menos si conseguimos sponsors) para bancar el asado, leña y bebidas pero el que quiera ir y no cuente con la plata nos tira un mensaje privado y lo solucionamos, no queremos que nadie deje de ir.
+ 
+ Charlas:
+ - TBD
+ - TBD
+ 
+ Recuerden ser responsables con el tema asistencia así podemos aprovechar mejor los eventos :)
+ 
+ Se busca asador/asadora!
+ 
+ Gracias a WyeWorks por el lugar!
+ 
+ Details: https://www.meetup.com/montevideojs/events/266741136/
+ Location: José Agustín Iturriaga 3359, Montevideo, Uruguay
diff --git a/.emacs.d.back/emojis/emojione-v2.2.6-22/0023-20e3.png b/.emacs.d.back/emojis/emojione-v2.2.6-22/0023-20e3.png
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+++ b/.emacs.d.back/emojis/emojione-v2.2.6-22/2764.png
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diff --git a/.emacs.d.back/emojis/emojione-v2.2.6-22/3297.png b/.emacs.d.back/emojis/emojione-v2.2.6-22/3297.png
new file mode 100644
index 00000000..b6bc90d4
--- /dev/null
+++ b/.emacs.d.back/emojis/emojione-v2.2.6-22/3297.png
diff --git a/.emacs.d.back/emojis/emojione-v2.2.6-22/3299.png b/.emacs.d.back/emojis/emojione-v2.2.6-22/3299.png
new file mode 100644
index 00000000..0931af1a
--- /dev/null
+++ b/.emacs.d.back/emojis/emojione-v2.2.6-22/3299.png
diff --git a/.emacs.d.back/init.el b/.emacs.d.back/init.el
new file mode 100644
index 00000000..bc1c843c
--- /dev/null
+++ b/.emacs.d.back/init.el
@@ -0,0 +1,42 @@
+;;; init.el --- rogs Emacs configuration
+;;
+;;; Commentary:
+;;
+;; This is my basic configuration for Emacs as text editor.
+;; It is mainly focused on Web Development with JS, React, Django and Node
+;;
+;;; Code:
+
+(setq user-full-name "Roger González")
+(setq user-mail-address "roger@rogs.me")
+
+(package-initialize)
+
+;; Define Folders
+(defvar core-dir (expand-file-name "core" user-emacs-directory)
+  "Directory containing core configuration.")
+
+(defvar setup-dir (expand-file-name "setup" user-emacs-directory)
+  "Directory containing modes configuration.")
+(setq custom-file "~/.emacs.d/core/rogs-custom.el")
+
+(add-to-list 'load-path core-dir)
+(add-to-list 'load-path setup-dir)
+(load custom-file)
+
+;; Load core configurations
+(require 'rogs-core)
+(require 'rogs-packages)
+(require 'rogs-ui)
+(require 'rogs-keybindings)
+
+;; Load modes configurations
+(require 'setup-web-mode)
+(require 'setup-js-mode)
+(require 'setup-flycheck-mode)
+(require 'setup-yaml-mode)
+(require 'setup-python-mode)
+(require 'setup-org-mode)
+
+(provide 'init.el)
+;;; init.el ends here
diff --git a/.emacs.d.back/network-security.data b/.emacs.d.back/network-security.data
new file mode 100644
index 00000000..20f05eb2
--- /dev/null
+++ b/.emacs.d.back/network-security.data
@@ -0,0 +1,3 @@
+(
+ (:id "sha1:85457c729378cc93c732b6a3941c8e4f9c2e60f3" :fingerprint "sha1:ab:a6:d7:6a:b3:d3:63:fa:19:0d:65:41:60:23:6e:ef:d3:2a:46:dc" :host "marmalade-repo.org:443" :conditions (:expired :unknown-ca :invalid))
+)
diff --git a/.emacs.d.back/org/templates/basic-task.txt b/.emacs.d.back/org/templates/basic-task.txt
new file mode 100644
index 00000000..dbb6c6d7
--- /dev/null
+++ b/.emacs.d.back/org/templates/basic-task.txt
@@ -0,0 +1,5 @@
+** TODO %^{Description}
+   :LOGBOOK:
+   - Added: %U
+   :END:
+   %?
diff --git a/.emacs.d.back/org/templates/meeting.txt b/.emacs.d.back/org/templates/meeting.txt
new file mode 100644
index 00000000..f6226a6a
--- /dev/null
+++ b/.emacs.d.back/org/templates/meeting.txt
@@ -0,0 +1,5 @@
+** Meeting <%<%a %d>>
+   :LOGBOOK:
+   - Added: %U
+   :END:
+   %?
diff --git a/.emacs.d.back/org/templates/scheduled-task.txt b/.emacs.d.back/org/templates/scheduled-task.txt
new file mode 100644
index 00000000..1c94a6f8
--- /dev/null
+++ b/.emacs.d.back/org/templates/scheduled-task.txt
@@ -0,0 +1,6 @@
+** TODO %^{Description}
+   SCHEDULED: <%<2019-%^{Month}-%^{Day} %a>>
+   :LOGBOOK:
+   - Added: %U
+   :END:
+   %?
diff --git a/.emacs.d.back/packages/all-the-icons/.gitignore b/.emacs.d.back/packages/all-the-icons/.gitignore
new file mode 100644
index 00000000..9b4291b7
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/.gitignore
@@ -0,0 +1,5 @@
+# Compiled
+*.elc
+
+# Packaging
+.cask
diff --git a/.emacs.d.back/packages/all-the-icons/.travis.yml b/.emacs.d.back/packages/all-the-icons/.travis.yml
new file mode 100644
index 00000000..4e6ca57e
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/.travis.yml
@@ -0,0 +1,34 @@
+language: emacs-lisp
+sudo: false
+cache:
+  - directories:
+      # Cache stable Emacs binaries (saves 1min per job)
+      - "$HOME/emacs/"
+# Allow Emacs snapshot builds to fail and don’t wait for these as they can take
+# a looooong time
+matrix:
+  fast_finish: true
+  allow_failures:
+    - env: EMACS_VERSION=snapshot
+env:
+  - EMACS_VERSION=24.3
+  - EMACS_VERSION=24.5
+  - EMACS_VERSION=25.1
+  - EMACS_VERSION=25.2
+  - EMACS_VERSION=snapshot
+before_install:
+  # Configure $PATH: Executables are installed to $HOME/bin
+  - export PATH="$HOME/bin:$PATH"
+  # Download the makefile to emacs-travis.mk
+  - wget 'https://raw.githubusercontent.com/flycheck/emacs-travis/master/emacs-travis.mk'
+  # Install Emacs (according to $EMACS_VERSION) and Cask
+  - make -f emacs-travis.mk install_emacs
+  - make -f emacs-travis.mk install_cask
+install:
+  # Install your dependencies
+  - cask install
+script:
+  # Run your tests
+  - ls *
+  - cask --version
+  - cask exec ert-runner -l data/*.el all-the-icons-faces.el
diff --git a/.emacs.d.back/packages/all-the-icons/Cask b/.emacs.d.back/packages/all-the-icons/Cask
new file mode 100644
index 00000000..df4451b5
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/Cask
@@ -0,0 +1,10 @@
+(source gnu)
+(source melpa)
+
+(package-file "all-the-icons.el")
+
+(files "*.el" "data/data-*.el")
+
+(development
+  (depends-on "f")
+  (depends-on "ert-runner"))
diff --git a/.emacs.d.back/packages/all-the-icons/LICENSE b/.emacs.d.back/packages/all-the-icons/LICENSE
new file mode 100644
index 00000000..9de1be6f
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Dom Charlesworth
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/README.md b/.emacs.d.back/packages/all-the-icons/README.md
new file mode 100644
index 00000000..f2101e98
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/README.md
@@ -0,0 +1,213 @@
+![img](logo.png)
+
+<p align="center">
+<b><a href="#installation">Installation</a></b>
+|
+<b><a href="#usage">Usage</a></b>
+|
+<b><a href="#resource-fonts">Fonts</a></b>
+|
+<b><a href="#wiki">Wiki</a></b>
+</p>
+
+<p align="center">
+  <a href="https://melpa.org/#/all-the-icons"><img src="https://melpa.org/packages/all-the-icons-badge.svg"></a>
+  <a href="https://stable.melpa.org/#/all-the-icons"><img src="https://stable.melpa.org/packages/all-the-icons-badge.svg"></a>
+  <a href="https://github.com/domtronn/all-the-icons.el/releases"><img src="https://img.shields.io/github/tag/domtronn/all-the-icons.el.svg"></a>
+  <a href="https://travis-ci.org/domtronn/all-the-icons.el"><img src="https://travis-ci.org/domtronn/all-the-icons.el.svg?branch=master"></a>
+  <a href="https://github.com/domtronn/all-the-icons.el/blob/master/LICENSE"><img src="https://img.shields.io/github/license/mashape/apistatus.svg"></a>
+</p>
+
+# Installation
+
+You should be able to install this package in the standard way, add it
+to the load path and then calling
+
+```el
+(require 'all-the-icons)
+;; or
+(use-package all-the-icons)
+```
+
+### Installing Fonts
+
+In order for the icons to work it is **very important** that you install
+the Resource Fonts included in this package, they are available in the
+[ `fonts` ](file:///fonts) directory. You can also install the *latest*
+fonts for this package in the *(guessed?)* based on the OS by calling
+the following function;
+
+    M-x all-the-icons-install-fonts
+
+Bear in mind, this will also run `fc-cache -f -v` on **MacOS** and
+**Linux** which *can take some time* to complete. For **Windows**, this
+function will prompt for a *download* directory for you to install
+them manually.
+
+# Usage
+
+The simplest usage for this package is to use the following functions;
+
+-   `all-the-icons-icon-for-buffer`
+-   `all-the-icons-icon-for-file`
+-   `all-the-icons-icon-for-mode`
+-   `all-the-icons-icon-for-url`
+
+Which can be used to get a formatted icon which you can insert into
+buffers, *e.g.*
+
+```el
+(insert (all-the-icons-icon-for-file "foo.js"))
+    ;; Inserts a javascript icon
+    ;; #("js-icon" 0 1 (display (raise -0.24) face (:family "alltheicon" :height 1.08 :foreground "#FFD446")))
+```
+
+## Inserting Icons Directly
+
+The above is fine if you want this package to automatically decide on
+the icon you want for files and things, however, to insert the icons
+directly you will want to use these icons functions;
+
+-   `all-the-icons-alltheicon`
+-   `all-the-icons-faicon`
+-   `all-the-icons-fileicon`
+-   `all-the-icons-oction`
+-   `all-the-icons-wicon`
+
+You can then call these functions with the icon you want to insert,
+*e.g.*
+
+```el
+(all-the-icons-octicon "file-binary")  ;; GitHub Octicon for Binary File
+(all-the-icons-faicon  "cogs")         ;; FontAwesome icon for cogs
+(all-the-icons-wicon   "tornado")      ;; Weather Icon for tornado
+```
+
+A list of all the icon names for a font family can be found in the
+`data` directory, or by inspecting the alist variables.
+
+The alist variables are all prefixed with
+
+-   `all-the-icons-data/`
+
+For example `C-h v all-the-icons-data/ <TAB>` will give a list of all the data
+alist you can describe *(and the icon fonts they're associated with)*
+
+## Inserting icons with properties
+
+Each of the above icon functions can also be given different
+properties to slightly adjust the way they're formatted, these are
+
+-   `:height` - The height of the icon
+-   `:v-adjust` - Vertical adjust (*positive is up, negative is down*)
+-   `:face` - The face to apply to the icon, defaults to `\'default`
+
+So you would call, for example
+
+```el
+(all-the-icons-wicon "tornado" :face 'all-the-icons-blue)
+```
+
+These properties can also be used on the `all-the-icons-icon-for-file`
+and `all-the-icons-icon-for-mode` functions as well, *i.e.*
+
+```el
+(insert (all-the-icons-icon-for-file "foo.js" :height 2 :face 'all-the-icons-lred))
+    ;; Inserts a RED Javascript icon with height 2
+    ;; #("js-icon" 0 1 (display (raise -0.24) face (:family "alltheicon" :height 2.0 :foreground "red")))
+```
+
+## Propertizing icons yourself
+
+However, sometimes when propertizing these icons *(for example if you
+were customising your mode line)* you *may* sometimes have to know the
+font family to add in to override the current font family being used,
+*e.g.*
+
+```el
+(propertize (all-the-icons-octicon "package")
+            'face `(:family ,(all-the-icons-octicon-family) :height 1.2)
+            'display '(raise -0.1))
+```
+
+## Troubleshooting
+
+If you see placeholders (AKA tofus) being rendered, or the wrong icons being displayed, the underlying cause generally falls into one of three categories:
+
+1. Font installation failed due to networking issues. Check your OS' and Emacs' networking (`M-x customize-group RET gnutls/nsm/url/network RET`) and security settings (i.e. proxy, firewall, antivirus software...)
+2. On \*nix systems, make sure the font cache has been updated. `all-the-icons-install-fonts` should do this for you automatically, but sometimes it may fail due to misconfiguration.
+3. You've misconfigured your font settings in Emacs.
+
+To check if you've misconfigured your Emacs font settings, you can try the following steps:
+
+1. Print out all of the icons in an icon set and their corresponding id/name.
+
+```el
+
+;; Valid font families are 'material 'wicon 'octicon 'faicon 'fileicon and 'alltheicon
+
+(all-the-icons-insert-icons-for 'alltheicon)   ;; Prints all the icons for `alltheicon' font set
+
+(all-the-icons-insert-icons-for 'octicon 10)   ;; Prints all the icons for the `octicon' family
+                                               ;; and makes the icons height 10
+
+(all-the-icons-insert-icons-for 'faicon 1 0.5) ;; Prints all the icons for the `faicon' family
+                                               ;; and also waits 0.5s between printing each one
+```
+
+2. Now that you are certain which icon set is not displaying properly, check the fontset currently in effect.
+  * Look up the hex code of the icon from the `data/data-[font-family].el` file. Write it down.
+  * `M-x describe-fontset RET RET`
+  * Now you are looking at the fontset for the current frame, search for the hex range for that icon. Usually it's `#xE000`, or `#xF0` `#xF2`, but there are a few outside of these offsets.
+  * If you don't see the font family in question in the list of fontspecs (i.e. `[-*-file-icons-...]`) below the range, or some other fontspecs in front of the one in question, you will have to add the families back to the fontset (scroll to the top to see which one is in effect), or arrange the fontspec order. For example:
+  
+```elisp
+(set-fontset-font t 'unicode (font-spec :family "all-the-icons") nil 'append)
+(set-fontset-font t 'unicode (font-spec :family "file-icons") nil 'append)
+(set-fontset-font t 'unicode (font-spec :family "Material Icons") nil 'append)
+(set-fontset-font t 'unicode (font-spec :family "github-octicons") nil 'append)
+(set-fontset-font t 'unicode (font-spec :family "FontAwesome") nil 'append)
+(set-fontset-font t 'unicode (font-spec :family "Weather Icons") nil 'append)
+```  
+
+# Resource Fonts
+
+All of the fonts provided in this packages as resources come with
+either the SIL Open Font License *(OFL)* or an MIT License, below I
+will link to each of the fonts Sources and their Licenses.
+
+| Font Name | Font | License |
+| --- | --- | --- |
+| `file-icons.ttf` | [Atom File Icons Plugin](https://atom.io/packages/file-icons) | [MIT LICENSE](https://github.com/DanBrooker/file-icons/blob/master/LICENSE.md) |
+| `fontawesome.ttf` | [FontAwesome Icons](http://fontawesome.io/) | [SIL OFL LICENSE](https://github.com/FortAwesome/Font-Awesome#license) |
+| `ocitcons.ttf` | [GitHub OctIcons](http://octicons.github.com) | [SIL OFL LICENSE](https://github.com/primer/octicons/blob/master/LICENSE) |
+| `weathericons.ttf` | [Weather Icons](https://erikflowers.github.io/weather-icons/) | [SIL OFL LICENSE](https://github.com/primer/octicons/blob/master/LICENSE) |
+| `material-design-icons.ttf` | [Material Icons](http://google.github.io/material-design-icons/) | [APACHE LICENSE v2.0](http://www.apache.org/licenses/LICENSE-2.0.txt) |
+| `all-the-icons.ttf` | Custom Made Font | MIT LICENSE |
+
+The fonts provided with this packages are locked down to a version for
+unicode character mapping values. In the future, these may be
+automatically generated.
+
+I would like to thank all the authors for the creation and use
+of these fantastic fonts.
+
+# Wiki
+
+Lastly, there is a
+[Wiki Page](https://github.com/domtronn/all-the-icons.el/wiki) which
+should give you some ideas of ways to use this library to spruce up
+other Emacs packages.
+
+### Slow Rendering
+
+If you experience a slow down in performace when rendering multiple
+icons simultaneously, you can try setting the following variable
+
+```el
+(setq inhibit-compacting-font-caches t)
+```
+
+Some people have found that this [fixes the problem](https://github.com/domtronn/all-the-icons.el/issues/28)
+
+[▲ back to top](#readme)
diff --git a/.emacs.d.back/packages/all-the-icons/all-the-icons-faces.el b/.emacs.d.back/packages/all-the-icons/all-the-icons-faces.el
new file mode 100644
index 00000000..4408e97b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/all-the-icons-faces.el
@@ -0,0 +1,230 @@
+;;; all-the-icons-faces.el --- A module of faces for all-the-icons
+
+;; Copyright (C) 2016  Dominic Charlesworth <dgc336@gmail.com>
+
+;; Author: Dominic Charlesworth <dgc336@gmail.com>
+;; Version: 1.0.0
+;; Package-Requires: ((emacs "24.3"))
+;; URL: https://github.com/domtronn/all-the-icons.el
+;; Keywords: convenient, lisp
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License
+;; as published by the Free Software Foundation; either version 3
+;; of the License, or (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file contains all of the faces used by the package for
+;; colouring icons
+
+;;; Code:
+
+(defgroup all-the-icons-faces nil
+  "Manage how All The Icons icons are coloured and themed."
+  :prefix "all-the-icons-"
+  :group 'tools
+  :group 'all-the-icons)
+
+
+;; red
+(defface all-the-icons-red
+  '((((background dark)) :foreground "#AC4142")
+    (((background light)) :foreground "#AC4142"))
+  "Face for red icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lred
+  '((((background dark)) :foreground "#EB595A")
+    (((background light)) :foreground "#EB595A"))
+  "Face for lred icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dred
+  '((((background dark)) :foreground "#843031")
+    (((background light)) :foreground "#843031"))
+  "Face for dred icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-red-alt
+  '((((background dark)) :foreground "#ce5643")
+    (((background light)) :foreground "#843031"))
+  "Face for dred icons"
+  :group 'all-the-icons-faces)
+
+;; green
+(defface all-the-icons-green
+  '((((background dark)) :foreground "#90A959")
+    (((background light)) :foreground "#90A959"))
+  "Face for green icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lgreen
+  '((((background dark)) :foreground "#C6E87A")
+    (((background light)) :foreground "#3D6837"))
+  "Face for lgreen icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dgreen
+  '((((background dark)) :foreground "#6D8143")
+    (((background light)) :foreground "#6D8143"))
+  "Face for dgreen icons"
+  :group 'all-the-icons-faces)
+
+;; yellow
+(defface all-the-icons-yellow
+  '((((background dark)) :foreground "#FFD446")
+    (((background light)) :foreground "#FFCC0E"))
+  "Face for yellow icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lyellow
+  '((((background dark)) :foreground "#FFC16D")
+    (((background light)) :foreground "#FF9300"))
+  "Face for lyellow icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dyellow
+  '((((background dark)) :foreground "#B48D56")
+    (((background light)) :foreground "#B48D56"))
+  "Face for dyellow icons"
+  :group 'all-the-icons-faces)
+
+;; blue
+(defface all-the-icons-blue
+  '((((background dark)) :foreground "#6A9FB5")
+    (((background light)) :foreground "#6A9FB5"))
+  "Face for blue icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-blue-alt
+  '((((background dark)) :foreground "#2188b6")
+    (((background light)) :foreground "#2188b6"))
+  "Face for blue icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lblue
+  '((((background dark)) :foreground "#8FD7F4")
+    (((background light)) :foreground "#677174"))
+  "Face for lblue icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dblue
+  '((((background dark)) :foreground "#446674")
+    (((background light)) :foreground "#446674"))
+  "Face for dblue icons"
+  :group 'all-the-icons-faces)
+
+;; maroon
+(defface all-the-icons-maroon
+  '((((background dark)) :foreground "#8F5536")
+    (((background light)) :foreground "#8F5536"))
+  "Face for maroon icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lmaroon
+  '((((background dark)) :foreground "#CE7A4E")
+    (((background light)) :foreground "#CE7A4E"))
+  "Face for lmaroon icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dmaroon
+  '((((background dark)) :foreground "#72584B")
+    (((background light)) :foreground "#72584B"))
+  "Face for dmaroon icons"
+  :group 'all-the-icons-faces)
+
+;; purple
+(defface all-the-icons-purple
+  '((((background dark)) :foreground "#AA759F")
+    (((background light)) :foreground "#68295B"))
+  "Face for purple icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-purple-alt
+  '((((background dark)) :foreground "#5D54E1")
+    (((background light)) :foreground "#5D54E1"))
+  "Face for purple icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lpurple
+  '((((background dark)) :foreground "#E69DD6")
+    (((background light)) :foreground "#E69DD6"))
+  "Face for lpurple icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dpurple
+  '((((background dark)) :foreground "#694863")
+    (((background light)) :foreground "#694863"))
+  "Face for dpurple icons"
+  :group 'all-the-icons-faces)
+
+;; orange
+(defface all-the-icons-orange
+  '((((background dark)) :foreground "#D4843E")
+    (((background light)) :foreground "#D4843E"))
+  "Face for orange icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lorange
+  '((((background dark)) :foreground "#FFA500")
+    (((background light)) :foreground "#FFA500"))
+  "Face for lorange icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dorange
+  '((((background dark)) :foreground "#915B2D")
+    (((background light)) :foreground "#915B2D"))
+  "Face for dorange icons"
+  :group 'all-the-icons-faces)
+
+;; cyan
+(defface all-the-icons-cyan
+  '((((background dark)) :foreground "#75B5AA")
+    (((background light)) :foreground "#75B5AA"))
+  "Face for cyan icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-cyan-alt
+  '((((background dark)) :foreground "#61dafb")
+    (((background light)) :foreground "#0595bd"))
+  "Face for cyan icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lcyan
+  '((((background dark)) :foreground "#A5FDEC")
+    (((background light)) :foreground "#2C7D6E"))
+  "Face for lcyan icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dcyan
+  '((((background dark)) :foreground "#48746D")
+    (((background light)) :foreground "#48746D"))
+  "Face for dcyan icons"
+  :group 'all-the-icons-faces)
+
+;; pink
+(defface all-the-icons-pink
+  '((((background dark)) :foreground "#F2B4B8")
+    (((background light)) :foreground "#FC505B"))
+  "Face for pink icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lpink
+  '((((background dark)) :foreground "#FFBDC1")
+    (((background light)) :foreground "#FF505B"))
+  "Face for lpink icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dpink
+  '((((background dark)) :foreground "#B18286")
+    (((background light)) :foreground "#7E5D5F"))
+  "Face for dpink icons"
+  :group 'all-the-icons-faces)
+
+;; silver
+(defface all-the-icons-silver
+  '((((background dark)) :foreground "#716E68")
+    (((background light)) :foreground "#716E68"))
+  "Face for silver icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-lsilver
+  '((((background dark)) :foreground "#B9B6AA")
+    (((background light)) :foreground "#7F7869"))
+  "Face for lsilver icons"
+  :group 'all-the-icons-faces)
+(defface all-the-icons-dsilver
+  '((((background dark)) :foreground "#838484")
+    (((background light)) :foreground "#838484"))
+  "Face for dsilver icons"
+  :group 'all-the-icons-faces)
+
+
+(provide 'all-the-icons-faces)
+;;; all-the-icons-faces.el ends here
diff --git a/.emacs.d.back/packages/all-the-icons/all-the-icons.el b/.emacs.d.back/packages/all-the-icons/all-the-icons.el
new file mode 100644
index 00000000..f0113398
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/all-the-icons.el
@@ -0,0 +1,964 @@
+;;; all-the-icons.el --- A library for inserting Developer icons
+
+;; Copyright (C) 2016  Dominic Charlesworth <dgc336@gmail.com>
+
+;; Author: Dominic Charlesworth <dgc336@gmail.com>
+;; Version: 3.1.4
+;; Package-Requires: ((emacs "24.3") (memoize "1.0.1"))
+;; URL: https://github.com/domtronn/all-the-icons.el
+;; Keywords: convenient, lisp
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License
+;; as published by the Free Software Foundation; either version 3
+;; of the License, or (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This package is a utility for using and formatting various Icon
+;; fonts within Emacs.  Icon Fonts allow you to propertize and format
+;; icons the same way you would normal text.  This enables things such
+;; as better scaling of and anti aliasing of the icons.
+
+;; This package was inspired by
+
+;; - `mode-icons' for Emacs, found at https://github.com/ryuslash/mode-icons
+;; - `file-icons' for Atom, found at https://atom.io/packages/file-icons
+
+;; Currently, this package provides an interface to the following Icon Fonts
+
+;; - Atom File Icons,       found at https://atom.io/packages/file-icons
+;; - FontAwesome Icons,     found at http://fontawesome.io/
+;; - GitHub Octicons,       found at http://octicons.github.com
+;; - Material Design Icons, found at http://google.github.io/material-design-icons/
+;; - Weather Icons,         found at https://erikflowers.github.io/weather-icons/
+;; - AllTheIcons,           a custom Icon Font maintained as part of this package
+
+;; Requests for new icons will be accepted and added to the AllTheIcons Icon Font
+
+;;; Usage:
+
+;; The simplest usage for this package is to use the following functions;
+
+;;   `all-the-icons-icon-for-buffer'
+;;   `all-the-icons-icon-for-file'
+;;   `all-the-icons-icon-for-mode'
+;;   `all-the-icons-icon-for-url'
+
+;; Which can be used to get a formatted icon for the current buffer, a
+;; file name, a major mode, or an URL respectively.  e.g.
+
+;;   (insert (all-the-icons-icon-for-file "foo.js"))
+
+;; Inserts a JavaScript icon formatted like this
+
+;;   #("some-icon" 0 1 (display (raise -0.24)
+;;              face (:family "dev-icons" :height 1.08 :foreground "#FFD446")))
+
+;; You can also insert icons directly using the individual icon family
+;; functions
+
+;;   `all-the-icons-alltheicon'     // Custom font with fewest icons
+;;   `all-the-icons-devicon'        // Developer Icons
+;;   `all-the-icons-faicon'         // Font Awesome Icons
+;;   `all-the-icons-fileicon'       // File Icons from the Atom File Icons package
+;;   `all-the-icons-octicon'        // GitHub Octicons
+;;   `all-the-icons-material'       // Material Design Icons
+;;   `all-the-icons-wicon'          // Weather Icons
+
+;; You can call these functions with the icon name you want to insert, e.g.
+
+;;   (all-the-icons-octicon "file-binary")  // GitHub Octicon for Binary File
+;;   (all-the-icons-faicon  "cogs")         // FontAwesome icon for cogs
+;;   (all-the-icons-wicon   "tornado")      // Weather Icon for tornado
+
+;; A list of all the icon names for the different font families can be
+;; found in the data directory, or by inspecting the alist variables.
+;; All the alist variables are prefixed with `all-the-icons-data/'
+
+;;; Code:
+(require 'memoize)
+(require 'cl-lib)
+
+(require 'data-alltheicons  "./data/data-alltheicons.el")
+(require 'data-faicons      "./data/data-faicons.el")
+(require 'data-fileicons    "./data/data-fileicons.el")
+(require 'data-octicons     "./data/data-octicons.el")
+(require 'data-weathericons "./data/data-weathericons.el")
+(require 'data-material     "./data/data-material.el")
+
+(require 'all-the-icons-faces)
+
+;;; Custom Variables
+(defgroup all-the-icons nil
+  "Manage how All The Icons formats icons."
+  :prefix "all-the-icons-"
+  :group 'appearance
+  :group 'convenience)
+
+(defcustom all-the-icons-color-icons t
+  "Whether or not to include a foreground colour when formatting the icon."
+  :group 'all-the-icons
+  :type 'boolean)
+
+(defcustom all-the-icons-scale-factor 1.2
+  "The base Scale Factor for the `height' face property of an icon."
+  :group 'all-the-icons
+  :type 'number)
+
+(defcustom all-the-icons-default-adjust -0.2
+  "The default adjustment to be made to the `raise' display property of an icon."
+  :group 'all-the-icons
+  :type 'number)
+
+(defvar all-the-icons-font-families '() "List of defined icon font families.")
+(defvar all-the-icons-font-names '() "List of defined font file names this package was built with.")
+
+(defvar all-the-icons-icon-alist
+  '(
+    ;; Meta
+    ("\\.tags"          all-the-icons-octicon "tag"                     :height 1.0 :v-adjust 0.0 :face all-the-icons-blue)
+    ("^TAGS$"           all-the-icons-octicon "tag"                     :height 1.0 :v-adjust 0.0 :face all-the-icons-blue)
+    ("\\.log"           all-the-icons-octicon "bug"                     :height 1.0 :v-adjust 0.0 :face all-the-icons-maroon)
+
+    ;;
+    ("\\.key$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-lblue)
+    ("\\.pem$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-orange)
+    ("\\.p12$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-dorange)
+    ("\\.crt$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-lblue)
+    ("\\.pub$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-blue)
+    ("\\.gpg$"          all-the-icons-octicon "key"                     :v-adjust 0.0 :face all-the-icons-lblue)
+
+    ("^TODO$"           all-the-icons-octicon "checklist"               :v-adjust 0.0 :face all-the-icons-lyellow)
+    ("^LICENSE$"        all-the-icons-octicon "book"                    :height 1.0 :v-adjust 0.0 :face all-the-icons-blue)
+    ("^readme"          all-the-icons-octicon "book"                    :height 1.0 :v-adjust 0.0 :face all-the-icons-lcyan)
+
+    ("\\.fish"          all-the-icons-alltheicon "terminal"             :face all-the-icons-lpink)
+    ("\\.zsh"           all-the-icons-alltheicon "terminal"             :face all-the-icons-lcyan)
+    ("\\.sh"            all-the-icons-alltheicon "terminal"             :face all-the-icons-purple)
+
+    ;; Config
+    ("\\.node"          all-the-icons-alltheicon "nodejs"               :height 1.0  :face all-the-icons-green)
+    ("\\.babelrc$"      all-the-icons-fileicon "babel"                  :face all-the-icons-yellow)
+    ("\\.bashrc$"       all-the-icons-alltheicon "script"               :height 0.9  :face all-the-icons-dpink)
+    ("\\.bowerrc$"      all-the-icons-alltheicon "bower"                :height 1.0 :v-adjust 0.0 :face all-the-icons-silver)
+    ("^bower.json$"     all-the-icons-alltheicon "bower"                :height 1.0 :v-adjust 0.0 :face all-the-icons-lorange)
+    ("\\.ini$"          all-the-icons-octicon "settings"                :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.eslintignore"  all-the-icons-fileicon "eslint"                 :height 0.9  :face all-the-icons-purple)
+    ("\\.eslint"        all-the-icons-fileicon "eslint"                 :height 0.9  :face all-the-icons-lpurple)
+    ("\\.git"           all-the-icons-alltheicon "git"                  :height 1.0  :face all-the-icons-lred)
+    ("nginx"            all-the-icons-fileicon "nginx"                  :height 0.9  :face all-the-icons-dgreen)
+    ("apache"           all-the-icons-alltheicon "apache"               :height 0.9  :face all-the-icons-dgreen)
+    ("^Makefile$"       all-the-icons-fileicon "gnu"                    :face all-the-icons-dorange)
+    ("\\.mk$"           all-the-icons-fileicon "gnu"                    :face all-the-icons-dorange)
+
+    ("\\.dockerignore$" all-the-icons-fileicon "dockerfile"             :height 1.2  :face all-the-icons-dblue)
+    ("^\\.?Dockerfile"  all-the-icons-fileicon "dockerfile"             :face all-the-icons-blue)
+    ("^Brewfile$"       all-the-icons-faicon "beer"                     :face all-the-icons-lsilver)
+    ("\\.npmignore"     all-the-icons-fileicon "npm"                    :face all-the-icons-dred)
+    ("^package.json$"   all-the-icons-fileicon "npm"                    :face all-the-icons-red)
+    ("^package.lock.json$" all-the-icons-fileicon "npm"                 :face all-the-icons-dred)
+    ("^yarn\.lock"      all-the-icons-fileicon "yarn"                   :face all-the-icons-blue-alt)
+
+    ("\.xml$"           all-the-icons-faicon "file-code-o"              :height 0.95 :face all-the-icons-lorange)
+
+    ;; ;; AWS
+    ("^stack.*.json$"   all-the-icons-alltheicon "aws"                  :face all-the-icons-orange)
+
+
+    ("^serverless\\.yml$" all-the-icons-faicon "bolt"                   :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.[jc]son$"      all-the-icons-octicon "settings"                :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.ya?ml$"        all-the-icons-octicon "settings"                :v-adjust 0.0 :face all-the-icons-dyellow)
+
+    ("\\.pkg$"          all-the-icons-octicon "package"                 :v-adjust 0.0 :face all-the-icons-dsilver)
+    ("\\.rpm$"          all-the-icons-octicon "package"                 :v-adjust 0.0 :face all-the-icons-dsilver)
+
+    ("\\.elc$"          all-the-icons-octicon "file-binary"             :v-adjust 0.0 :face all-the-icons-dsilver)
+
+    ("\\.gz$"           all-the-icons-octicon "file-binary"             :v-adjust 0.0 :face all-the-icons-lmaroon)
+    ("\\.zip$"          all-the-icons-octicon "file-zip"                :v-adjust 0.0 :face all-the-icons-lmaroon)
+    ("\\.7z$"           all-the-icons-octicon "file-zip"                :v-adjust 0.0 :face all-the-icons-lmaroon)
+
+    ("\\.dat$"          all-the-icons-faicon "bar-chart"                :face all-the-icons-cyan :height 0.9)
+    ;; lock files
+    ("~$"               all-the-icons-octicon "lock"                    :v-adjust 0.0 :face all-the-icons-maroon)
+
+    ("\\.dmg$"          all-the-icons-octicon "tools"                   :v-adjust 0.0 :face all-the-icons-lsilver)
+    ("\\.dll$"          all-the-icons-faicon "cogs"                     :face all-the-icons-silver)
+    ("\\.DS_STORE$"     all-the-icons-faicon "cogs"                     :face all-the-icons-silver)
+
+    ;; Source Codes
+    ("\\.scpt$"         all-the-icons-fileicon "apple"                  :face all-the-icons-pink)
+    ("\\.aup$"          all-the-icons-fileicon "audacity"               :face all-the-icons-yellow)
+
+    ("\\.elm"           all-the-icons-fileicon "elm"                    :face all-the-icons-blue)
+
+    ("\\.erl$"          all-the-icons-alltheicon "erlang"               :face all-the-icons-red :v-adjust -0.1 :height 0.9)
+    ("\\.hrl$"          all-the-icons-alltheicon "erlang"               :face all-the-icons-dred :v-adjust -0.1 :height 0.9)
+
+    ("\\.eex$"          all-the-icons-alltheicon "elixir"               :face all-the-icons-lorange :v-adjust -0.1 :height 0.9)
+    ("\\.ex$"           all-the-icons-alltheicon "elixir"               :face all-the-icons-lpurple :v-adjust -0.1 :height 0.9)
+    ("\\.exs$"          all-the-icons-alltheicon "elixir"               :face all-the-icons-lred :v-adjust -0.1 :height 0.9)
+    ("^mix.lock$"       all-the-icons-alltheicon "elixir"               :face all-the-icons-lyellow :v-adjust -0.1 :height 0.9)
+
+    ("\\.java$"         all-the-icons-alltheicon "java"                 :height 1.0  :face all-the-icons-purple)
+
+    ("\\.go$"           all-the-icons-alltheicon "go"                   :height 1.0  :face all-the-icons-blue)
+
+    ("\\.mp3$"          all-the-icons-faicon "volume-up"                :face all-the-icons-dred)
+    ("\\.wav$"          all-the-icons-faicon "volume-up"                :face all-the-icons-dred)
+    ("\\.m4a$"          all-the-icons-faicon "volume-up"                :face all-the-icons-dred)
+
+    ("\\.jl$"           all-the-icons-fileicon "julia"                  :v-adjust 0.0 :face all-the-icons-purple)
+    ("\\.matlab$"       all-the-icons-fileicon "matlab"                 :face all-the-icons-orange)
+
+    ("\\.nix$"          all-the-icons-fileicon "nix"                    :face all-the-icons-blue)
+
+    ("\\.p[ml]$"        all-the-icons-alltheicon "perl"                 :face all-the-icons-lorange)
+    ("\\.pl6$"          all-the-icons-fileicon "perl6"                  :face all-the-icons-cyan)
+    ("\\.pod$"          all-the-icons-alltheicon "perldocs"             :height 1.2  :face all-the-icons-lgreen)
+
+    ("\\.php$"          all-the-icons-fileicon "php"                    :face all-the-icons-lsilver)
+    ("\\.pony$"         all-the-icons-fileicon "pony"                   :face all-the-icons-maroon)
+    ("\\.prol?o?g?$"    all-the-icons-alltheicon "prolog"               :height 1.1  :face all-the-icons-lmaroon)
+    ("\\.py$"           all-the-icons-alltheicon "python"               :height 1.0  :face all-the-icons-dblue)
+
+    ("\\.rkt$"          all-the-icons-fileicon "racket"                 :height 1.2 :face all-the-icons-red)
+    ("\\.gem$"          all-the-icons-alltheicon "ruby-alt"             :face all-the-icons-red)
+    ("_?test\\.rb$"        all-the-icons-fileicon "test-ruby"            :height 1.0 :v-adjust 0.0 :face all-the-icons-red)
+    ("_?test_helper\\.rb$" all-the-icons-fileicon "test-ruby"            :height 1.0 :v-adjust 0.0 :face all-the-icons-dred)
+    ("\\.rb$"           all-the-icons-octicon "ruby"                    :v-adjust 0.0 :face all-the-icons-lred)
+    ("\\.rs$"           all-the-icons-alltheicon "rust"                 :height 1.2  :face all-the-icons-maroon)
+    ("\\.rlib$"         all-the-icons-alltheicon "rust"                 :height 1.2  :face all-the-icons-dmaroon)
+    ("\\.r[ds]?x?$"     all-the-icons-fileicon "R"                      :face all-the-icons-lblue)
+
+    ("\\.sbt$"          all-the-icons-fileicon   "sbt"                  :face all-the-icons-red)
+    ("\\.scala$"        all-the-icons-alltheicon "scala"                :face all-the-icons-red)
+    ("\\.scm$"          all-the-icons-fileicon   "scheme"               :height 1.2 :face all-the-icons-red)
+    ("\\.swift$"        all-the-icons-alltheicon "swift"                :height 1.0 :v-adjust -0.1 :face all-the-icons-green)
+
+    ("-?spec\\.ts$"     all-the-icons-fileicon "test-typescript"        :height 1.0 :v-adjust 0.0 :face all-the-icons-blue)
+    ("-?test\\.ts$"     all-the-icons-fileicon "test-typescript"        :height 1.0 :v-adjust 0.0 :face all-the-icons-blue)
+    ("-?spec\\.js$"     all-the-icons-fileicon "test-js"                :height 1.0 :v-adjust 0.0 :face all-the-icons-lpurple)
+    ("-?test\\.js$"     all-the-icons-fileicon "test-js"                :height 1.0 :v-adjust 0.0 :face all-the-icons-lpurple)
+    ("-?spec\\.jsx$"    all-the-icons-fileicon "test-react"             :height 1.0 :v-adjust 0.0 :face all-the-icons-blue-alt)
+    ("-?test\\.jsx$"    all-the-icons-fileicon "test-react"             :height 1.0 :v-adjust 0.0 :face all-the-icons-blue-alt)
+
+    ("-?spec\\."        all-the-icons-fileicon "test-generic"           :height 1.0 :v-adjust 0.0 :face all-the-icons-dgreen)
+    ("-?test\\."        all-the-icons-fileicon "test-generic"           :height 1.0 :v-adjust 0.0 :face all-the-icons-dgreen)
+
+    ("\\.tf\\(vars\\|state\\)?$" all-the-icons-fileicon "terraform"     :height 1.0 :face all-the-icons-purple-alt)
+
+    ;; There seems to be a a bug with this font icon which does not
+    ;; let you propertise it without it reverting to being a lower
+    ;; case phi
+    ("\\.c$"            all-the-icons-alltheicon "c-line"               :face all-the-icons-blue)
+    ("\\.h$"            all-the-icons-alltheicon "c-line"               :face all-the-icons-purple)
+    ("\\.m$"            all-the-icons-fileicon "apple"                  :v-adjust 0.0 :height 1.0)
+    ("\\.mm$"           all-the-icons-fileicon "apple"                  :v-adjust 0.0 :height 1.0)
+
+    ("\\.c\\(c\\|pp\\|xx\\)$"   all-the-icons-alltheicon "cplusplus-line"       :v-adjust -0.2 :face all-the-icons-blue)
+    ("\\.h\\(h\\|pp\\|xx\\)$"   all-the-icons-alltheicon "cplusplus-line"       :v-adjust -0.2 :face all-the-icons-purple)
+
+    ("\\.csx?$"         all-the-icons-alltheicon "csharp-line"          :face all-the-icons-dblue)
+
+    ("\\.cljc?$"        all-the-icons-alltheicon "clojure-line"         :height 1.0 :face all-the-icons-blue :v-adjust 0.0)
+    ("\\.cljs$"         all-the-icons-fileicon "cljs"                   :height 1.0 :face all-the-icons-dblue :v-adjust 0.0)
+
+    ("\\.coffee$"       all-the-icons-alltheicon "coffeescript"         :height 1.0  :face all-the-icons-maroon)
+    ("\\.iced$"         all-the-icons-alltheicon "coffeescript"         :height 1.0  :face all-the-icons-lmaroon)
+
+    ;; Git
+    ("^MERGE_"          all-the-icons-octicon "git-merge"               :v-adjust 0.0 :face all-the-icons-red)
+    ("^COMMIT_EDITMSG"  all-the-icons-octicon "git-commit"              :v-adjust 0.0 :face all-the-icons-red)
+
+    ;; Lisps
+    ("\\.cl$"           all-the-icons-fileicon "clisp"                  :face all-the-icons-lorange)
+    ("\\.l\\(isp\\)?$"  all-the-icons-fileicon "lisp"                   :face all-the-icons-orange)
+    ("\\.el$"           all-the-icons-fileicon "elisp"                  :height 1.0 :v-adjust -0.2 :face all-the-icons-purple)
+
+    ;; Stylesheeting
+    ("\\.css$"          all-the-icons-alltheicon "css3"                 :face all-the-icons-yellow)
+    ("\\.scss$"         all-the-icons-alltheicon "sass"                 :face all-the-icons-pink)
+    ("\\.sass$"         all-the-icons-alltheicon "sass"                 :face all-the-icons-dpink)
+    ("\\.less$"         all-the-icons-alltheicon "less"                 :height 0.8  :face all-the-icons-dyellow)
+    ("\\.postcss$"      all-the-icons-fileicon "postcss"                :face all-the-icons-dred)
+    ("\\.sss$"          all-the-icons-fileicon "postcss"                :face all-the-icons-dred)
+    ("\\.styl$"         all-the-icons-alltheicon "stylus"               :face all-the-icons-lgreen)
+    ("stylelint"        all-the-icons-fileicon "stylelint"              :face all-the-icons-lyellow)
+    ("\\.csv$"          all-the-icons-octicon "graph"                   :v-adjust 0.0 :face all-the-icons-dblue)
+
+    ("\\.hs$"           all-the-icons-alltheicon "haskell"              :height 1.0  :face all-the-icons-red)
+
+    ;; Web modes
+    ("\\.inky-haml$"    all-the-icons-fileicon "haml"                   :face all-the-icons-lyellow)
+    ("\\.haml$"         all-the-icons-fileicon "haml"                   :face all-the-icons-lyellow)
+    ("\\.html?$"        all-the-icons-alltheicon "html5"                :face all-the-icons-orange)
+    ("\\.inky-erb?$"    all-the-icons-alltheicon "html5"                :face all-the-icons-lred)
+    ("\\.erb$"          all-the-icons-alltheicon "html5"                :face all-the-icons-lred)
+    ("\\.hbs$"          all-the-icons-fileicon "moustache"              :face all-the-icons-green)
+    ("\\.inky-slim$"    all-the-icons-octicon "dashboard"               :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.slim$"         all-the-icons-octicon "dashboard"               :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.jade$"         all-the-icons-fileicon "jade"                   :face all-the-icons-red)
+    ("\\.pug$"          all-the-icons-fileicon "pug-alt"                :face all-the-icons-red)
+
+    ;; JavaScript
+    ("^gulpfile"        all-the-icons-alltheicon "gulp"                 :height 1.0  :face all-the-icons-lred)
+    ("^gruntfile"       all-the-icons-alltheicon "grunt"                :height 1.0 :v-adjust -0.1 :face all-the-icons-lyellow)
+    ("^webpack"         all-the-icons-fileicon "webpack"                :face all-the-icons-lblue)
+
+    ("\\.d3\\.?js"      all-the-icons-alltheicon "d3"                   :height 0.8  :face all-the-icons-lgreen)
+
+    ("\\.re$"            all-the-icons-fileicon "reason"                :height 1.0  :face all-the-icons-red-alt)
+    ("\\.rei$"           all-the-icons-fileicon "reason"                :height 1.0  :face all-the-icons-dred)
+    ("\\.ml$"            all-the-icons-fileicon "ocaml"                 :height 1.0  :face all-the-icons-lpink)
+    ("\\.mli$"           all-the-icons-fileicon "ocaml"                 :height 1.0  :face all-the-icons-dpink)
+
+    ("\\.react"         all-the-icons-alltheicon "react"                :height 1.1  :face all-the-icons-lblue)
+    ("\\.d\\.ts$"       all-the-icons-fileicon "typescript"             :height 1.0 :v-adjust -0.1 :face all-the-icons-cyan-alt)
+    ("\\.ts$"           all-the-icons-fileicon "typescript"             :height 1.0 :v-adjust -0.1 :face all-the-icons-blue-alt)
+    ("\\.js$"           all-the-icons-alltheicon "javascript"           :height 1.0 :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.es[0-9]$"      all-the-icons-alltheicon "javascript"           :height 1.0 :v-adjust 0.0 :face all-the-icons-yellow)
+    ("\\.jsx$"          all-the-icons-fileicon "jsx-2"                  :height 1.0 :v-adjust -0.1 :face all-the-icons-cyan-alt)
+    ("\\.njs$"          all-the-icons-alltheicon "nodejs"               :height 1.2  :face all-the-icons-lgreen)
+    ("\\.vue$"          all-the-icons-fileicon "vue"                    :face all-the-icons-lgreen)
+
+    ;; File Types
+    ("\\.ico$"          all-the-icons-octicon "file-media"              :v-adjust 0.0 :face all-the-icons-blue)
+    ("\\.png$"          all-the-icons-octicon "file-media"              :v-adjust 0.0 :face all-the-icons-orange)
+    ("\\.gif$"          all-the-icons-octicon "file-media"              :v-adjust 0.0 :face all-the-icons-green)
+    ("\\.jpe?g$"        all-the-icons-octicon "file-media"              :v-adjust 0.0 :face all-the-icons-dblue)
+    ("\\.svg$"          all-the-icons-alltheicon "svg"                  :height 0.9  :face all-the-icons-lgreen)
+
+    ;; Video
+    ("\\.mov"           all-the-icons-faicon "film"                     :face all-the-icons-blue)
+    ("\\.mp4"           all-the-icons-faicon "film"                     :face all-the-icons-blue)
+    ("\\.ogv"           all-the-icons-faicon "film"                     :face all-the-icons-dblue)
+
+    ;; Fonts
+    ("\\.ttf$"          all-the-icons-fileicon "font"                   :v-adjust 0.0 :face all-the-icons-dcyan)
+    ("\\.woff2?$"       all-the-icons-fileicon "font"                   :v-adjust 0.0 :face all-the-icons-cyan)
+
+    ;; Doc
+    ("\\.pdf"           all-the-icons-octicon "file-pdf"                :v-adjust 0.0 :face all-the-icons-dred)
+    ("\\.te?xt"         all-the-icons-octicon "file-text"               :v-adjust 0.0 :face all-the-icons-cyan)
+    ("\\.doc[xm]?$"     all-the-icons-fileicon "word"                   :face all-the-icons-blue)
+    ("\\.texi?$"        all-the-icons-fileicon "tex"                    :face all-the-icons-lred)
+    ("\\.md$"           all-the-icons-octicon "markdown"                :v-adjust 0.0 :face all-the-icons-lblue)
+    ("\\.bib$"          all-the-icons-fileicon "bib"                    :face all-the-icons-maroon)
+    ("\\.org$"          all-the-icons-fileicon "org"                    :face all-the-icons-lgreen)
+
+    ("\\.pp[st]$"       all-the-icons-fileicon "powerpoint"             :face all-the-icons-orange)
+    ("\\.pp[st]x$"      all-the-icons-fileicon "powerpoint"             :face all-the-icons-red)
+    ("\\.knt$"          all-the-icons-fileicon "powerpoint"             :face all-the-icons-cyan)
+
+    ("bookmark"         all-the-icons-octicon "bookmark"                :height 1.1 :v-adjust 0.0 :face all-the-icons-lpink)
+    ("\\.cache$"        all-the-icons-octicon "database"                :height 1.0 :v-adjust 0.0 :face all-the-icons-green)
+
+    ("^\\*scratch\\*$"  all-the-icons-faicon "sticky-note"              :face all-the-icons-lyellow)
+    ("^\\*scratch.*"    all-the-icons-faicon "sticky-note"              :face all-the-icons-yellow)
+    ("^\\*new-tab\\*$"  all-the-icons-material "star"                     :face all-the-icons-cyan)
+
+    ("^\\."             all-the-icons-octicon "gear"                    :v-adjust 0.0)
+    ("."                all-the-icons-faicon "file-o"                   :height 0.8 :v-adjust 0.0 :face all-the-icons-dsilver)))
+
+(defvar all-the-icons-dir-icon-alist
+  '(
+    ("trash"            all-the-icons-faicon "trash-o"          :height 1.2 :v-adjust -0.1)
+    ("dropbox"          all-the-icons-faicon "dropbox"          :height 1.0 :v-adjust -0.1)
+    ("google[ _-]drive" all-the-icons-alltheicon "google-drive" :height 1.3 :v-adjust -0.1)
+    ("^atom$"           all-the-icons-alltheicon "atom"         :height 1.2 :v-adjust -0.1)
+    ("documents"        all-the-icons-faicon "book"             :height 1.0 :v-adjust -0.1)
+    ("download"         all-the-icons-faicon "cloud-download"   :height 0.9 :v-adjust -0.2)
+    ("desktop"          all-the-icons-octicon "device-desktop"  :height 1.0 :v-adjust -0.1)
+    ("pictures"         all-the-icons-faicon "picture-o"        :height 0.9 :v-adjust -0.2)
+    ("photos"           all-the-icons-faicon "camera-retro"     :height 1.0 :v-adjust -0.1)
+    ("music"            all-the-icons-faicon "music"            :height 1.0 :v-adjust -0.1)
+    ("movies"           all-the-icons-faicon "film"             :height 0.9 :v-adjust -0.1)
+    ("code"             all-the-icons-octicon "code"            :height 1.1 :v-adjust -0.1)
+    ("workspace"        all-the-icons-octicon "code"            :height 1.1 :v-adjust -0.1)
+    ("test"             all-the-icons-fileicon "test-dir"       :height 0.9)
+    ("\\.git"           all-the-icons-alltheicon "git"          :height 1.0)
+    ("."                all-the-icons-octicon "file-directory"  :height 1.0 :v-adjust -0.1)
+    ))
+
+(defvar all-the-icons-weather-icon-alist
+  '(
+    ("tornado"               all-the-icons-wicon "tornado")
+    ("hurricane"             all-the-icons-wicon "hurricane")
+    ("thunderstorms"         all-the-icons-wicon "thunderstorm")
+    ("sunny"                 all-the-icons-wicon "day-sunny")
+    ("rain.*snow"            all-the-icons-wicon "rain-mix")
+    ("rain.*hail"            all-the-icons-wicon "rain-mix")
+    ("sleet"                 all-the-icons-wicon "sleet")
+    ("hail"                  all-the-icons-wicon "hail")
+    ("drizzle"               all-the-icons-wicon "sprinkle")
+    ("rain"                  all-the-icons-wicon "showers" :height 1.1 :v-adjust 0.0)
+    ("showers"               all-the-icons-wicon "showers")
+    ("blowing.*snow"         all-the-icons-wicon "snow-wind")
+    ("snow"                  all-the-icons-wicon "snow")
+    ("dust"                  all-the-icons-wicon "dust")
+    ("fog"                   all-the-icons-wicon "fog")
+    ("haze"                  all-the-icons-wicon "day-haze")
+    ("smoky"                 all-the-icons-wicon "smoke")
+    ("blustery"              all-the-icons-wicon "cloudy-windy")
+    ("windy"                 all-the-icons-wicon "cloudy-gusts")
+    ("cold"                  all-the-icons-wicon "snowflake-cold")
+    ("partly.*cloudy.*night" all-the-icons-wicon "night-alt-partly-cloudy")
+    ("partly.*cloudy"        all-the-icons-wicon "day-cloudy-high")
+    ("cloudy.*night"         all-the-icons-wicon "night-alt-cloudy")
+    ("cxloudy.*day"          all-the-icons-wicon "day-cloudy")
+    ("cloudy"                all-the-icons-wicon "cloudy")
+    ("clear.*night"          all-the-icons-wicon "night-clear")
+    ("fair.*night"           all-the-icons-wicon "stars")
+    ("fair.*day"             all-the-icons-wicon "horizon")
+    ("hot"                   all-the-icons-wicon "hot")
+    ("not.*available"        all-the-icons-wicon "na")
+    ))
+
+(defvar all-the-icons-mode-icon-alist
+  '(
+    (emacs-lisp-mode           all-the-icons-fileicon "elisp"              :height 1.0 :v-adjust -0.2 :face all-the-icons-purple)
+    (erc-mode                  all-the-icons-faicon "commenting-o"         :height 1.0 :v-adjust 0.0 :face all-the-icons-white)
+    (inferior-emacs-lisp-mode  all-the-icons-fileicon "elisp"              :height 1.0 :v-adjust -0.2 :face all-the-icons-lblue)
+    (dired-mode                all-the-icons-octicon "file-directory"      :v-adjust 0.0)
+    (lisp-interaction-mode     all-the-icons-fileicon "lisp"               :v-adjust -0.1 :face all-the-icons-orange)
+    (sly-mrepl-mode            all-the-icons-fileicon "clisp"               :v-adjust -0.1 :face all-the-icons-orange)
+    (slime-repl-mode           all-the-icons-fileicon "clisp"               :v-adjust -0.1 :face all-the-icons-orange)
+    (org-mode                  all-the-icons-fileicon "org"                :v-adjust 0.0 :face all-the-icons-lgreen)
+    (typescript-mode           all-the-icons-fileicon "typescript"         :v-adjust -0.1 :face all-the-icons-blue-alt)
+    (js-mode                   all-the-icons-alltheicon "javascript"       :v-adjust -0.1 :face all-the-icons-yellow)
+    (js-jsx-mode               all-the-icons-alltheicon "javascript"       :v-adjust -0.1 :face all-the-icons-yellow)
+    (js2-mode                  all-the-icons-alltheicon "javascript"       :v-adjust -0.1 :face all-the-icons-yellow)
+    (js3-mode                  all-the-icons-alltheicon "javascript"       :v-adjust -0.1 :face all-the-icons-yellow)
+    (rjsx-mode                 all-the-icons-fileicon "jsx-2"              :v-adjust -0.1 :face all-the-icons-cyan-alt)
+    (term-mode                 all-the-icons-octicon "terminal"            :v-adjust 0.2)
+    (eshell-mode               all-the-icons-octicon "terminal"            :v-adjust 0.0 :face all-the-icons-purple)
+    (magit-refs-mode           all-the-icons-octicon "git-branch"          :v-adjust 0.0 :face all-the-icons-red)
+    (magit-process-mode        all-the-icons-octicon "mark-github"         :v-adjust 0.0)
+    (magit-diff-mode           all-the-icons-octicon "git-compare"         :v-adjust 0.0 :face all-the-icons-lblue)
+    (ediff-mode                all-the-icons-octicon "git-compare"         :v-adjust 0.0 :Face all-the-icons-red)
+    (comint-mode               all-the-icons-faicon "terminal"             :v-adjust 0.0 :face all-the-icons-lblue)
+    (eww-mode                  all-the-icons-faicon "firefox"              :v-adjust -0.1 :face all-the-icons-red)
+    (org-agenda-mode           all-the-icons-octicon "checklist"           :v-adjust 0.0 :face all-the-icons-lgreen)
+    (cfw:calendar-mode         all-the-icons-octicon "calendar"            :v-adjust 0.0)
+    (ibuffer-mode              all-the-icons-faicon "files-o"              :v-adjust 0.0 :face all-the-icons-dsilver)
+    (messages-buffer-mode      all-the-icons-faicon "stack-overflow"       :v-adjust -0.1)
+    (help-mode                 all-the-icons-faicon "info"                 :v-adjust -0.1 :face all-the-icons-purple)
+    (benchmark-init/tree-mode  all-the-icons-octicon "dashboard"           :v-adjust 0.0)
+    (jenkins-mode              all-the-icons-fileicon "jenkins"            :face all-the-icons-blue)
+    (magit-popup-mode          all-the-icons-alltheicon "git"              :face all-the-icons-red)
+    (magit-status-mode         all-the-icons-alltheicon "git"              :face all-the-icons-lred)
+    (magit-log-mode            all-the-icons-alltheicon "git"              :face all-the-icons-green)
+    (paradox-menu-mode         all-the-icons-faicon "archive"              :height 1.0 :v-adjust 0.0 :face all-the-icons-silver)
+    (Custom-mode               all-the-icons-octicon "settings")
+
+    ;; Special matcher for Web Mode based on the `web-mode-content-type' of the current buffer
+    (web-mode             all-the-icons--web-mode-icon)
+
+    (fundamental-mode                   all-the-icons-fileicon "elisp"            :height 1.0 :v-adjust -0.2 :face all-the-icons-dsilver)
+    (special-mode                       all-the-icons-fileicon "elisp"            :height 1.0 :v-adjust -0.2 :face all-the-icons-yellow)
+    (text-mode                          all-the-icons-octicon "file-text"         :v-adjust 0.0 :face all-the-icons-cyan)
+    (ruby-mode                          all-the-icons-alltheicon "ruby-alt"       :face all-the-icons-lred)
+    (inf-ruby-mode                      all-the-icons-alltheicon "ruby-alt"       :face all-the-icons-red)
+    (projectile-rails-compilation-mode  all-the-icons-alltheicon "ruby-alt"       :face all-the-icons-red)
+    (rspec-compilation-mode             all-the-icons-alltheicon "ruby-alt"       :face all-the-icons-red)
+    (rake-compilation-mode              all-the-icons-alltheicon "ruby-alt"       :face all-the-icons-red)
+    (sh-mode                            all-the-icons-alltheicon "terminal"       :face all-the-icons-purple)
+    (shell-mode                         all-the-icons-alltheicon "terminal"       :face all-the-icons-purple)
+    (fish-mode                          all-the-icons-alltheicon "terminal"       :face all-the-icons-lpink)
+    (nginx-mode                         all-the-icons-fileicon "nginx"            :height 0.9  :face all-the-icons-dgreen)
+    (apache-mode                        all-the-icons-alltheicon "apache"         :height 0.9  :face all-the-icons-dgreen)
+    (makefile-mode                      all-the-icons-fileicon "gnu"              :face all-the-icons-dorange)
+    (dockerfile-mode                    all-the-icons-fileicon "dockerfile"       :face all-the-icons-blue)
+    (docker-compose-mode                all-the-icons-fileicon "dockerfile"       :face all-the-icons-lblue)
+    (xml-mode                           all-the-icons-faicon "file-code-o"        :height 0.95 :face all-the-icons-lorange)
+    (json-mode                          all-the-icons-octicon "settings"          :face all-the-icons-yellow)
+    (yaml-mode                          all-the-icons-octicon "settings"          :v-adjust 0.0 :face all-the-icons-dyellow)
+    (elisp-byte-code-mode               all-the-icons-octicon "file-binary"       :v-adjust 0.0 :face all-the-icons-dsilver)
+    (archive-mode                       all-the-icons-octicon "file-zip"          :v-adjust 0.0 :face all-the-icons-lmaroon)
+    (elm-mode                           all-the-icons-fileicon "elm"              :face all-the-icons-blue)
+    (erlang-mode                        all-the-icons-alltheicon "erlang"         :face all-the-icons-red :v-adjust -0.1 :height 0.9)
+    (elixir-mode                        all-the-icons-alltheicon "elixir"         :face all-the-icons-lorange :v-adjust -0.1 :height 0.9)
+    (java-mode                          all-the-icons-alltheicon "java"           :height 1.0  :face all-the-icons-purple)
+    (go-mode                            all-the-icons-alltheicon "go"             :height 1.0  :face all-the-icons-blue)
+    (matlab-mode                        all-the-icons-fileicon "matlab"           :face all-the-icons-orange)
+    (perl-mode                          all-the-icons-alltheicon "perl"           :face all-the-icons-lorange)
+    (cperl-mode                         all-the-icons-alltheicon "perl"           :face all-the-icons-lorange)
+    (php-mode                           all-the-icons-fileicon "php"              :face all-the-icons-lsilver)
+    (prolog-mode                        all-the-icons-alltheicon "prolog"         :height 1.1  :face all-the-icons-lmaroon)
+    (python-mode                        all-the-icons-alltheicon "python"         :height 1.0  :face all-the-icons-dblue)
+    (inferior-python-mode               all-the-icons-alltheicon "python"         :height 1.0  :face all-the-icons-dblue)
+    (racket-mode                        all-the-icons-fileicon "racket"           :height 1.2 :face all-the-icons-red)
+    (rust-mode                          all-the-icons-alltheicon "rust"           :height 1.2  :face all-the-icons-maroon)
+    (scala-mode                         all-the-icons-alltheicon "scala"          :face all-the-icons-red)
+    (scheme-mode                        all-the-icons-fileicon   "scheme"         :height 1.2 :face all-the-icons-red)
+    (swift-mode                         all-the-icons-alltheicon "swift"          :height 1.0 :v-adjust -0.1 :face all-the-icons-green)
+    (c-mode                             all-the-icons-alltheicon "c-line"         :face all-the-icons-blue)
+    (c++-mode                           all-the-icons-alltheicon "cplusplus-line" :v-adjust -0.2 :face all-the-icons-blue)
+    (csharp-mode                        all-the-icons-alltheicon "csharp-line"    :face all-the-icons-dblue)
+    (clojure-mode                       all-the-icons-alltheicon "clojure-line"   :height 1.0  :face all-the-icons-blue)
+    (cider-repl-mode                    all-the-icons-alltheicon "clojure-line"   :height 1.0  :face all-the-icons-dblue)
+    (clojurescript-mode                 all-the-icons-fileicon "cljs"             :height 1.0  :face all-the-icons-dblue)
+    (coffee-mode                        all-the-icons-alltheicon "coffeescript"   :height 1.0  :face all-the-icons-maroon)
+    (lisp-mode                          all-the-icons-fileicon "lisp"             :face all-the-icons-orange)
+    (css-mode                           all-the-icons-alltheicon "css3"           :face all-the-icons-yellow)
+    (scss-mode                          all-the-icons-alltheicon "sass"           :face all-the-icons-pink)
+    (sass-mode                          all-the-icons-alltheicon "sass"           :face all-the-icons-dpink)
+    (less-css-mode                      all-the-icons-alltheicon "less"           :height 0.8  :face all-the-icons-dyellow)
+    (stylus-mode                        all-the-icons-alltheicon "stylus"         :face all-the-icons-lgreen)
+    (csv-mode                           all-the-icons-octicon "graph"             :v-adjust 0.0 :face all-the-icons-dblue)
+    (haskell-mode                       all-the-icons-alltheicon "haskell"        :height 1.0  :face all-the-icons-red)
+    (haml-mode                          all-the-icons-fileicon "haml"             :face all-the-icons-lyellow)
+    (html-mode                          all-the-icons-alltheicon "html5"          :face all-the-icons-orange)
+    (rhtml-mode                         all-the-icons-alltheicon "html5"          :face all-the-icons-lred)
+    (mustache-mode                      all-the-icons-fileicon "moustache"        :face all-the-icons-green)
+    (slim-mode                          all-the-icons-octicon "dashboard"         :v-adjust 0.0 :face all-the-icons-yellow)
+    (jade-mode                          all-the-icons-fileicon "jade"             :face all-the-icons-red)
+    (pug-mode                           all-the-icons-fileicon "pug"              :face all-the-icons-red)
+    (react-mode                         all-the-icons-alltheicon "react"          :height 1.1  :face all-the-icons-lblue)
+    (image-mode                         all-the-icons-octicon "file-media"        :v-adjust 0.0 :face all-the-icons-blue)
+    (texinfo-mode                       all-the-icons-fileicon "tex"              :face all-the-icons-lred)
+    (markdown-mode                      all-the-icons-octicon "markdown"          :v-adjust 0.0 :face all-the-icons-lblue)
+    (bibtex-mode                        all-the-icons-fileicon "bib"              :face all-the-icons-maroon)
+    (org-mode                           all-the-icons-fileicon "org"              :face all-the-icons-lgreen)
+    (compilation-mode                   all-the-icons-faicon "cogs"               :v-adjust 0.0 :height 1.0)
+    (objc-mode                          all-the-icons-faicon "apple"              :v-adjust 0.0 :height 1.0)
+    (tuareg-mode                        all-the-icons-fileicon "ocaml"            :v-adjust 0.0 :height 1.0)
+    (purescript-mode                    all-the-icons-fileicon "purescript"       :v-adjust 0.0 :height 1.0)
+    ))
+
+(defvar all-the-icons-url-alist
+  '(
+    ;; Social media and communities
+    ("^\\(https?://\\)?\\(www\\.\\)?del\\.icio\\.us" all-the-icons-faicon "delicious")
+    ("^\\(https?://\\)?\\(www\\.\\)?behance\\.net" all-the-icons-faicon "behance")
+    ("^\\(https?://\\)?\\(www\\.\\)?dribbble\\.com" all-the-icons-faicon "dribbble")
+    ("^\\(https?://\\)?\\(www\\.\\)?facebook\\.com" all-the-icons-faicon "facebook-official")
+    ("^\\(https?://\\)?\\(www\\.\\)?glide\\.me" all-the-icons-faicon "glide-g")
+    ("^\\(https?://\\)?\\(www\\.\\)?plus\\.google\\.com" all-the-icons-faicon "google-plus")
+    ("linkedin\\.com" all-the-icons-faicon "linkedin")
+    ("^\\(https?://\\)?\\(www\\.\\)?ok\\.ru" all-the-icons-faicon "odnoklassniki")
+    ("^\\(https?://\\)?\\(www\\.\\)?reddit\\.com" all-the-icons-faicon "reddit-alien")
+    ("^\\(https?://\\)?\\(www\\.\\)?slack\\.com" all-the-icons-faicon "slack")
+    ("^\\(https?://\\)?\\(www\\.\\)?snapchat\\.com" all-the-icons-faicon "snapchat-ghost")
+    ("^\\(https?://\\)?\\(www\\.\\)?weibo\\.com" all-the-icons-faicon "weibo")
+    ("^\\(https?://\\)?\\(www\\.\\)?twitter\\.com" all-the-icons-faicon "twitter")
+    ;; Blogging
+    ("joomla\\.org" all-the-icons-faicon "joomla")
+    ("^\\(https?://\\)?\\(www\\.\\)?medium\\.com" all-the-icons-faicon "medium")
+    ("tumblr\\.com" all-the-icons-faicon "tumblr")
+    ("^wordpress\\.com" all-the-icons-faicon "wordpress")
+    ;; Programming
+    ("^\\(https?://\\)?\\(www\\.\\)?bitbucket\\.org" all-the-icons-octicon "bitbucket")
+    ("^\\(https?://\\)?\\(www\\.\\)?codepen\\.io" all-the-icons-faicon "codepen")
+    ("^\\(https?://\\)?\\(www\\.\\)?codiepie\\.com" all-the-icons-faicon "codiepie")
+    ("^\\(https?://\\)?\\(www\\.\\)?gist\\.github\\.com" all-the-icons-octicon "gist")
+    ("^\\(https?://\\)?\\(www\\.\\)?github\\.com" all-the-icons-octicon "mark-github")
+    ("^\\(https?://\\)?\\(www\\.\\)?gitlab\\.com" all-the-icons-faicon "gitlab")
+    ("^\\(https?://\\)?\\(www\\.\\)?news\\.ycombinator\\.com" all-the-icons-faicon "hacker-news")
+    ("^\\(https?://\\)?\\(www\\.\\)?jsfiddle\\.net" all-the-icons-faicon "jsfiddle")
+    ("^\\(https?://\\)?\\(www\\.\\)?maxcdn\\.com" all-the-icons-faicon "maxcdn")
+    ("^\\(https?://\\)?\\(www\\.\\)?stackoverflow\\.com" all-the-icons-faicon "stack-overflow")
+    ;; Video
+    ("^\\(https?://\\)?\\(www\\.\\)?twitch\\.tv" all-the-icons-faicon "twitch")
+    ("^\\(https?://\\)?\\(www\\.\\)?vimeo\\.com" all-the-icons-faicon "vimeo")
+    ("^\\(https?://\\)?\\(www\\.\\)?youtube\\.com" all-the-icons-faicon "youtube")
+    ("^\\(https?://\\)?\\(www\\.\\)?youtu\\.be" all-the-icons-faicon "youtube")
+    ("^\\(https?://\\)?\\(www\\.\\)?vine\\.co" all-the-icons-faicon "vine")
+    ;; Sound
+    ("^\\(https?://\\)?\\(www\\.\\)?last\\.fm" all-the-icons-faicon "lastfm")
+    ("^\\(https?://\\)?\\(www\\.\\)?mixcloud\\.com" all-the-icons-faicon "mixcloud")
+    ("^\\(https?://\\)?\\(www\\.\\)?soundcloud\\.com" all-the-icons-faicon "soundcloud")
+    ("spotify\\.com" all-the-icons-faicon "spotify")
+    ;; Shopping
+    ("^\\(https?://\\)?\\(www\\.\\)?amazon\\." all-the-icons-faicon "amazon")
+    ("^\\(https?://\\)?\\(www\\.\\)?opencart\\.com" all-the-icons-faicon "opencart")
+    ("^\\(https?://\\)?\\(www\\.\\)?paypal\\.com" all-the-icons-faicon "paypal")
+    ("^\\(https?://\\)?\\(www\\.\\)?shirtsinbulk\\.com" all-the-icons-faicon "shitsinbulk")
+    ;; Images
+    ("^\\(https?://\\)?\\(www\\.\\)?500px\\.com" all-the-icons-faicon "500px")
+    ("^\\(https?://\\)?\\(www\\.\\)?deviantart\\.com" all-the-icons-faicon "deviantart")
+    ("^\\(https?://\\)?\\(www\\.\\)?flickr\\.com" all-the-icons-faicon "flickr")
+    ("^\\(https?://\\)?\\(www\\.\\)?instagram\\.com" all-the-icons-faicon "instagram")
+    ("^\\(https?://\\)?\\(www\\.\\)?pinterest\\." all-the-icons-faicon "pinterest")
+    ;; Information and books
+    ("^\\(https?://\\)?\\(www\\.\\)?digg\\.com" all-the-icons-faicon "digg")
+    ("^\\(https?://\\)?\\(www\\.\\)?foursquare\\.com" all-the-icons-faicon "foursquare")
+    ("^\\(https?://\\)?\\(www\\.\\)?getpocket\\.com" all-the-icons-faicon "get-pocket")
+    ("^\\(https?://\\)?\\(www\\.\\)?scribd\\.com" all-the-icons-faicon "scribd")
+    ("^\\(https?://\\)?\\(www\\.\\)?slideshare\\.net" all-the-icons-faicon "slideshare")
+    ("stackexchange\\.com" all-the-icons-faicon "stack-exchange")
+    ("^\\(https?://\\)?\\(www\\.\\)?stumbleupon\\.com" all-the-icons-faicon "stumbleupon")
+    ("^\\(https?://\\)?\\(www\\.\\)?tripadvisor\\." all-the-icons-faicon "tripadvisor")
+    ("^\\(https?://\\)?\\(www\\.\\)?yelp\\." all-the-icons-faicon "yelp")
+
+    ("wikipedia\\.org" all-the-icons-faicon "wikipedia-w")
+    ;; Various companies and tools
+    ("^\\(https?://\\)?\\(www\\.\\)?angel\\.co" all-the-icons-faicon "angellist")
+    ("^\\(https?://\\)?\\(www\\.\\)?apple\\.com" all-the-icons-faicon "apple")
+    ("^\\(https?://\\)?\\(www\\.\\)?buysellads\\.com" all-the-icons-faicon "buysellads")
+    ("^\\(https?://\\)?\\(www\\.\\)?connectdevelop\\.com" all-the-icons-faicon "connectdevelop")
+    ("^\\(https?://\\)?\\(www\\.\\)?dashcube\\.com" all-the-icons-faicon "dashcube")
+    ("^\\(https?://\\)?\\(www\\.\\)?dropbox\\.com" all-the-icons-faicon "dropbox")
+    ("^\\(https?://\\)?\\(www\\.\\)?enviragallery\\.com" all-the-icons-faicon "envira")
+    ("^\\(https?://\\)?\\(www\\.\\)?fortawesome\\.com" all-the-icons-faicon "fort-awesome")
+    ("^\\(https?://\\)?\\(www\\.\\)?forumbee\\.com" all-the-icons-faicon "forumbee")
+    ("^\\(https?://\\)?\\(www\\.\\)?gratipay\\.com" all-the-icons-faicon "gratipay")
+    ("^\\(https?://\\)?\\(www\\.\\)?modx\\.com" all-the-icons-faicon "modx")
+    ("^\\(https?://\\)?\\(www\\.\\)?pagelines\\.com" all-the-icons-faicon "pagelines")
+    ("^\\(https?://\\)?\\(www\\.\\)?producthunt\\.com" all-the-icons-faicon "product-hunt")
+    ("sellsy\\.com" all-the-icons-faicon "sellsy")
+    ("^\\(https?://\\)?\\(www\\.\\)?simplybuilt\\.com" all-the-icons-faicon "simplybuilt")
+    ("^\\(https?://\\)?\\(www\\.\\)?skyatlas\\.com" all-the-icons-faicon "skyatlas")
+    ("^\\(https?://\\)?\\(www\\.\\)?skype\\.com" all-the-icons-faicon "skype")
+    ("steampowered\\.com" all-the-icons-faicon "steam")
+    ("^\\(https?://\\)?\\(www\\.\\)?themeisle\\.com" all-the-icons-faicon "themeisle")
+    ("^\\(https?://\\)?\\(www\\.\\)?trello\\.com" all-the-icons-faicon "trello")
+    ("^\\(https?://\\)?\\(www\\.\\)?whatsapp\\.com" all-the-icons-faicon "whatsapp")
+    ("^\\(https?://\\)?\\(www\\.\\)?ycombinator\\.com" all-the-icons-faicon "y-combinator")
+    ("yahoo\\.com" all-the-icons-faicon "yahoo")
+    ("^\\(https?://\\)?\\(www\\.\\)?yoast\\.com" all-the-icons-faicon "yoast")
+    ;; Catch all
+    ("android" all-the-icons-faicon "android")
+    ("creativecommons" all-the-icons-faicon "creative-commons")
+    ("forums?" all-the-icons-octicon "comment-discussion")
+    ("\\.pdf$" all-the-icons-octicon "file-pdf" :v-adjust 0.0 :face all-the-icons-dred)
+    ("google" all-the-icons-faicon "google")
+    ("\\.rss" all-the-icons-faicon "rss")
+    ))
+
+;; ====================
+;;   Functions Start
+;; ====================
+
+(defun all-the-icons-auto-mode-match? (&optional file)
+  "Whether or not FILE's `major-mode' match against its `auto-mode-alist'."
+  (let* ((file (or file (buffer-file-name) (buffer-name)))
+         (auto-mode (all-the-icons-match-to-alist file auto-mode-alist)))
+    (eq major-mode auto-mode)))
+
+(defun all-the-icons-match-to-alist (file alist)
+  "Match FILE against an entry in ALIST using `string-match'."
+  (cdr (cl-find-if (lambda (it) (string-match (car it) file)) alist)))
+
+(defun all-the-icons-dir-is-submodule (dir)
+  "Checker whether or not DIR is a git submodule."
+  (let* ((gitmodule-dir (locate-dominating-file dir ".gitmodules"))
+         (modules-file  (expand-file-name (format "%s.gitmodules" gitmodule-dir)))
+         (module-search (format "submodule \".*?%s\"" (file-name-base dir))))
+
+    (when (and gitmodule-dir (file-exists-p (format "%s/.git" dir)))
+      (with-temp-buffer
+        (insert-file-contents modules-file)
+        (search-forward-regexp module-search (point-max) t)))))
+
+;; Icon functions
+(defun all-the-icons-icon-for-dir (dir &optional chevron padding)
+  "Format an icon for DIR with CHEVRON similar to tree based directories.
+
+If PADDING is provided, it will prepend and separate the chevron
+and directory with PADDING.
+
+Produces different symbols by inspecting DIR to distinguish
+symlinks and git repositories which do not depend on the
+directory contents"
+  (let* ((matcher (all-the-icons-match-to-alist (file-name-base (directory-file-name dir)) all-the-icons-dir-icon-alist))
+         (path (expand-file-name dir))
+         (chevron (if chevron (all-the-icons-octicon (format "chevron-%s" chevron) :height 0.8 :v-adjust -0.1) ""))
+         (padding (or padding "\t"))
+         (icon (cond
+                ((file-symlink-p path)
+                 (all-the-icons-octicon "file-symlink-directory" :height 1.0))
+                ((all-the-icons-dir-is-submodule path)
+                 (all-the-icons-octicon "file-submodule" :height 1.0))
+                ((file-exists-p (format "%s/.git" path))
+                 (format "%s" (all-the-icons-octicon "repo" :height 1.1)))
+                (t (apply (car matcher) (cdr matcher))))))
+    (format "%s%s%s%s%s" padding chevron padding icon padding)))
+
+(defun all-the-icons-icon-for-buffer ()
+  "Get the formatted icon for the current buffer.
+
+This function prioritises the use of the buffers file extension to
+discern the icon when its `major-mode' matches its auto mode,
+otherwise it will use the buffers `major-mode' to decide its
+icon."
+  (all-the-icons--icon-info-for-buffer))
+
+(defun all-the-icons-icon-family-for-buffer ()
+  "Get the icon font family for the current buffer."
+  (all-the-icons--icon-info-for-buffer "family"))
+
+(defun all-the-icons--web-mode-icon (&rest arg-overrides) "Get icon for a `web-mode' buffer with ARG-OVERRIDES." (all-the-icons--web-mode nil arg-overrides))
+(defun all-the-icons--web-mode-icon-family () "Get icon family for a `web-mode' buffer." (all-the-icons--web-mode t))
+(defun all-the-icons--web-mode (&optional family arg-overrides)
+  "Return icon or FAMILY for `web-mode' based on `web-mode-content-type'.
+Providing ARG-OVERRIDES will modify the creation of the icon."
+  (let ((non-nil-args (cl-reduce (lambda (acc it) (if it (append acc (list it)) acc)) arg-overrides :initial-value '())))
+    (cond
+     ((equal web-mode-content-type "jsx")
+      (if family (all-the-icons-fileicon-family) (apply 'all-the-icons-fileicon (append '("jsx-2") non-nil-args))))
+     ((equal web-mode-content-type "javascript")
+      (if family (all-the-icons-alltheicon-family) (apply 'all-the-icons-alltheicon (append '("javascript") non-nil-args))))
+     ((equal web-mode-content-type "json")
+      (if family (all-the-icons-alltheicon-family) (apply 'all-the-icons-alltheicon (append '("less") non-nil-args))))
+     ((equal web-mode-content-type "xml")
+      (if family (all-the-icons-faicon-family) (apply 'all-the-icons-faicon (append '("file-code-o") non-nil-args))))
+     ((equal web-mode-content-type "css")
+      (if family (all-the-icons-alltheicon-family) (apply 'all-the-icons-alltheicon (append '("css3") non-nil-args))))
+     (t
+      (if family (all-the-icons-alltheicon-family) (apply 'all-the-icons-alltheicon (append '("html5") non-nil-args)))))))
+
+;; Icon Functions
+
+;;;###autoload
+(defun all-the-icons-icon-for-file (file &rest arg-overrides)
+  "Get the formatted icon for FILE.
+ARG-OVERRIDES should be a plist containining `:height',
+`:v-adjust' or `:face' properties like in the normal icon
+inserting functions."
+  (let* ((icon (all-the-icons-match-to-alist file all-the-icons-icon-alist))
+         (args (cdr icon)))
+    (when arg-overrides (setq args (append `(,(car args)) arg-overrides (cdr args))))
+    (apply (car icon) args)))
+
+;;;###autoload
+(defun all-the-icons-icon-for-mode (mode &rest arg-overrides)
+  "Get the formatted icon for MODE.
+ARG-OVERRIDES should be a plist containining `:height',
+`:v-adjust' or `:face' properties like in the normal icon
+inserting functions."
+  (let* ((icon (cdr (or (assoc mode all-the-icons-mode-icon-alist)
+                        (assoc (get mode 'derived-mode-parent) all-the-icons-mode-icon-alist))))
+         (args (cdr icon)))
+    (when arg-overrides (setq args (append `(,(car args)) arg-overrides (cdr args))))
+    (if icon (apply (car icon) args) mode)))
+
+;;;###autoload
+(defun all-the-icons-icon-for-url (url &rest arg-overrides)
+  "Get the formatted icon for URL.
+If an icon for URL isn't found in `all-the-icons-url-alist', a globe is used.
+ARG-OVERRIDES should be a plist containining `:height',
+`:v-adjust' or `:face' properties like in the normal icon
+inserting functions."
+  (let* ((icon (all-the-icons-match-to-alist url all-the-icons-url-alist))
+         (args (cdr icon)))
+    (unless icon
+      (setq icon '(all-the-icons-faicon "globe"))
+      (setq args (cdr icon)))
+    (when arg-overrides (setq args (append `(,(car args)) arg-overrides (cdr args))))
+    (apply (car icon) args)))
+
+(memoize 'all-the-icons-icon-for-file)
+(memoize 'all-the-icons-icon-for-mode)
+(memoize 'all-the-icons-icon-for-url)
+
+;; Family Face Functions
+(defun all-the-icons-icon-family-for-file (file)
+  "Get the icons font family for FILE."
+  (let ((icon (all-the-icons-match-to-alist file all-the-icons-icon-alist)))
+    (funcall (intern (format "%s-family" (car icon))))))
+
+(defun all-the-icons-icon-family-for-mode (mode)
+  "Get the icons font family for MODE."
+  (let ((icon (cdr (assoc mode all-the-icons-mode-icon-alist))))
+    (if icon (funcall (intern (format "%s-family" (car icon)))) nil)))
+
+(defun all-the-icons-icon-family (icon)
+  "Get a propertized ICON family programatically."
+  (plist-get (get-text-property 0 'face icon) :family))
+
+(memoize 'all-the-icons-icon-family-for-file)
+(memoize 'all-the-icons-icon-family-for-mode)
+(memoize 'all-the-icons-icon-family)
+
+;;;###autoload
+(defun all-the-icons--icon-info-for-buffer (&optional f)
+  "Get icon info for the current buffer.
+
+When F is provided, the info function is calculated with the format
+`all-the-icons-icon-%s-for-file' or `all-the-icons-icon-%s-for-mode'."
+  (let* ((base-f (concat "all-the-icons-icon" (when f (format "-%s" f))))
+         (file-f (intern (concat base-f "-for-file")))
+         (mode-f (intern (concat base-f "-for-mode"))))
+    (if (and (buffer-file-name)
+             (all-the-icons-auto-mode-match?))
+        (funcall file-f (file-name-nondirectory (buffer-file-name)))
+      (funcall mode-f major-mode))))
+
+;; Weather icons
+(defun all-the-icons-icon-for-weather (weather)
+  "Get an icon for a WEATHER status."
+  (let ((icon (all-the-icons-match-to-alist weather all-the-icons-weather-icon-alist)))
+    (if icon (apply (car icon) (cdr icon)) weather)))
+
+;; Definitions
+
+(eval-and-compile
+  (defun all-the-icons--function-name (name)
+    "Get the symbol for an icon function name for icon set NAME."
+    (intern (concat "all-the-icons-" (downcase (symbol-name name)))))
+
+  (defun all-the-icons--family-name (name)
+    "Get the symbol for an icon family function for icon set NAME."
+    (intern (concat "all-the-icons-" (downcase (symbol-name name)) "-family")))
+
+  (defun all-the-icons--data-name (name)
+    "Get the symbol for an icon family function for icon set NAME."
+    (intern (concat "all-the-icons-" (downcase (symbol-name name)) "-data")))
+
+  (defun all-the-icons--insert-function-name (name)
+    "Get the symbol for an icon insert function for icon set NAME."
+    (intern (concat "all-the-icons-insert-" (downcase (symbol-name name))))))
+
+;; Icon insertion functions
+
+(defun all-the-icons--read-candidates ()
+  "Helper to build a list of candidates for all families."
+  (cl-reduce 'append (mapcar (lambda (it) (all-the-icons--read-candidates-for-family it t)) all-the-icons-font-families)))
+
+(defun all-the-icons--read-candidates-for-family (family &optional show-family)
+  "Helper to build read candidates for FAMILY.
+If SHOW-FAMILY is non-nil, displays the icons family in the candidate string."
+  (let ((data   (funcall (all-the-icons--data-name family)))
+        (icon-f (all-the-icons--function-name family)))
+    (mapcar
+     (lambda (it)
+       (let* ((icon-name (car it))
+              (icon-name-head (substring icon-name 0 1))
+              (icon-name-tail (substring icon-name 1))
+
+              (icon-display (propertize icon-name-head 'display (format "%s\t%s" (funcall icon-f icon-name) icon-name-head)))
+              (icon-family (if show-family (format "\t[%s]" family) ""))
+
+              (candidate-name (format "%s%s%s" icon-display icon-name-tail icon-family))
+              (candidate-icon (funcall (all-the-icons--function-name family) icon-name)))
+
+         (cons candidate-name candidate-icon)))
+     data)))
+
+;;;###autoload
+(defun all-the-icons-install-fonts (&optional pfx)
+  "Helper function to download and install the latests fonts based on OS.
+When PFX is non-nil, ignore the prompt and just install"
+  (interactive "P")
+  (when (or pfx (yes-or-no-p "This will download and install fonts, are you sure you want to do this?"))
+    (let* ((url-format "https://raw.githubusercontent.com/domtronn/all-the-icons.el/master/fonts/%s")
+           (font-dest (cl-case window-system
+                        (x  (concat (or (getenv "XDG_DATA_HOME")            ;; Default Linux install directories
+                                        (concat (getenv "HOME") "/.local/share"))
+                                    "/fonts/"))
+                        (mac (concat (getenv "HOME") "/Library/Fonts/" ))
+                        (ns (concat (getenv "HOME") "/Library/Fonts/" ))))  ;; Default MacOS install directory
+           (known-dest? (stringp font-dest))
+           (font-dest (or font-dest (read-directory-name "Font installation directory: " "~/"))))
+
+      (unless (file-directory-p font-dest) (mkdir font-dest t))
+
+      (mapc (lambda (font)
+              (url-copy-file (format url-format font) (expand-file-name font font-dest) t))
+            all-the-icons-font-names)
+      (when known-dest?
+        (message "Fonts downloaded, updating font cache... <fc-cache -f -v> ")
+        (shell-command-to-string (format "fc-cache -f -v")))
+      (message "%s Successfully %s `all-the-icons' fonts to `%s'!"
+               (all-the-icons-wicon "stars" :v-adjust 0.0)
+               (if known-dest? "installed" "downloaded")
+               font-dest))))
+
+;;;###autoload
+(defun all-the-icons-insert (&optional arg family)
+  "Interactive icon insertion function.
+When Prefix ARG is non-nil, insert the propertized icon.
+When FAMILY is non-nil, limit the candidates to the icon set matching it."
+  (interactive "P")
+  (let* ((standard-output (current-buffer))
+         (candidates (if family
+                         (all-the-icons--read-candidates-for-family family)
+                       (all-the-icons--read-candidates)))
+         (prompt     (if family
+                         (format "%s Icon: " (funcall (all-the-icons--family-name family)))
+                       "Icon : "))
+
+         (selection (completing-read prompt candidates nil t))
+         (result    (cdr (assoc selection candidates))))
+
+    (if arg (prin1 result) (insert result))))
+
+;; Debug Helpers
+
+(defun all-the-icons-insert-icons-for (family &optional height duration)
+  "Insert all of the available icons associated with FAMILY.
+If a HEIGHT is provided it will render the icons at this height.
+This is useful both to see the icons more clearly and to test
+different height rendering.  If DURATION is provided, it will
+pause for DURATION seconds between printing each character."
+  (let* ((data-f    (all-the-icons--data-name family))
+         (insert-f  (all-the-icons--function-name family))
+
+         (height (or height 2.0))
+         (data (funcall data-f)))
+    (mapc
+     (lambda (it)
+       (insert (format "%s - %s\n" (funcall insert-f (car it) :height height) (car it)))
+       (when duration (sit-for duration 0)))
+     data)))
+
+(defmacro define-icon (name alist family &optional font-name)
+  "Macro to generate functions for inserting icons for icon set NAME.
+
+NAME defines is the name of the iconset and will produce a
+function of the for `all-the-icons-NAME'.
+
+ALIST is the alist containing maps between icon names and the
+UniCode for the character.  All of these can be found in the data
+directory of this package.
+
+FAMILY is the font family to use for the icons.
+FONT-NAME is the name of the .ttf file providing the font, defaults to FAMILY."
+  `(progn
+     (add-to-list 'all-the-icons-font-families (quote ,name))
+     (add-to-list 'all-the-icons-font-names (quote ,(downcase (format "%s.ttf" (or font-name family)))))
+
+     (defun ,(all-the-icons--family-name name) () ,family)
+     (defun ,(all-the-icons--data-name name) () ,alist)
+     (defun ,(all-the-icons--function-name name) (icon-name &rest args)
+       (let ((icon (cdr (assoc icon-name ,alist)))
+             (other-face (when all-the-icons-color-icons (plist-get args :face)))
+             (height  (* all-the-icons-scale-factor (or (plist-get args :height) 1.0)))
+             (v-adjust (* all-the-icons-scale-factor (or (plist-get args :v-adjust) all-the-icons-default-adjust)))
+             (family ,family))
+         (unless icon
+           (error (format "Unable to find icon with name `%s' in icon set `%s'" icon-name (quote ,name))))
+         (let ((face (if other-face
+                         `(:family ,family :height ,height :inherit ,other-face)
+                       `(:family ,family :height ,height))))
+           (propertize icon
+                       'face face           ;so that this works without `font-lock-mode' enabled
+                       'font-lock-face face ;so that `font-lock-mode' leaves this alone
+                       'display `(raise ,v-adjust)
+                       'rear-nonsticky t))))
+     (defun ,(all-the-icons--insert-function-name name) (&optional arg)
+       ,(format "Insert a %s icon at point." family)
+       (interactive "P")
+       (all-the-icons-insert arg (quote ,name)))))
+
+(define-icon alltheicon all-the-icons-data/alltheicons-alist    "all-the-icons")
+(define-icon fileicon   all-the-icons-data/file-icon-alist      "file-icons")
+(define-icon faicon     all-the-icons-data/fa-icon-alist        "FontAwesome")
+(define-icon octicon    all-the-icons-data/octicons-alist       "github-octicons" "octicons")
+(define-icon wicon      all-the-icons-data/weather-icons-alist  "Weather Icons"   "weathericons")
+(define-icon material   all-the-icons-data/material-icons-alist "Material Icons"  "material-design-icons")
+
+(provide 'all-the-icons)
+
+;;; all-the-icons.el ends here
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-alltheicons.el b/.emacs.d.back/packages/all-the-icons/data/data-alltheicons.el
new file mode 100644
index 00000000..3322500f
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-alltheicons.el
@@ -0,0 +1,70 @@
+(defvar all-the-icons-data/alltheicons-alist
+  '(
+
+    ( "apache"             . "\xe909" )
+    ( "atom"               . "\xe917" )
+    ( "aws"                . "\xe90c" )
+    ( "bower"              . "\xe918" )
+    ( "c"                  . "\xe915" )
+    ( "c-line"             . "\xe90f" )
+    ( "clojure"            . "\xe919" )
+    ( "clojure-line"       . "\xe91a" )
+    ( "coffeescript"       . "\xe914" )
+    ( "cplusplus"          . "\xe913" )
+    ( "cplusplus-line"     . "\xe910" )
+    ( "csharp"             . "\xe911" )
+    ( "csharp-line"        . "\xe912" )
+    ( "css3"               . "\xe91b" )
+    ( "css3-alt"           . "\xe91c" )
+    ( "d3"                 . "\xe90e" )
+    ( "dlang"              . "\xe935" )
+    ( "elixir"             . "\xe936" )
+    ( "erlang"             . "\xe934" )
+    ( "git"                . "\xe907" )
+    ( "go"                 . "\xe91d" )
+    ( "google-drive"       . "\xe91e" )
+    ( "grunt"              . "\xe90d" )
+    ( "grunt-line"         . "\xe91f" )
+    ( "gulp"               . "\xe920" )
+    ( "haskell"            . "\xe921" )
+    ( "html5"              . "\xe932" )
+    ( "jasmine"            . "\xe904" )
+    ( "java"               . "\xe922" )
+    ( "javascript"         . "\xe906" )
+    ( "javascript-badge"   . "\xe923" )
+    ( "javascript-shield"  . "\xe924" )
+    ( "less"               . "\xe90b" )
+    ( "nginx"              . "\xe933" )
+    ( "nodejs"             . "\xe925" )
+    ( "perl"               . "\xe905" )
+    ( "perldocs"           . "\xe926" )
+    ( "postgresql"         . "\xe938" )
+    ( "prolog"             . "\xe927" )
+    ( "python"             . "\xe928" )
+    ( "react"              . "\xe929" )
+    ( "ruby"               . "\xe92a" )
+    ( "ruby-alt"           . "\xe92b" )
+    ( "rust"               . "\xe92c" )
+    ( "sass"               . "\xe92d" )
+    ( "scala"              . "\xe908" )
+    ( "script"             . "\xe90a" )
+    ( "spring"             . "\xe937" )
+    ( "stylus"             . "\xe92e" )
+    ( "svg"                . "\xe903" )
+    ( "swift"              . "\xe92f" )
+    ( "terminal"           . "\xe930" )
+    ( "terminal-alt"       . "\xe931" )
+    ( "battery-charging"   . "\xe939" )
+
+    ( "arrow-left"  . "\xe93a" )
+    ( "arrow-right" . "\xe93b" )
+    ( "cup-left"    . "\xe93c" )
+    ( "cup-right"   . "\xe93d" )
+    ( "slant-left"  . "\xe93e" )
+    ( "slant-right" . "\xe93f" )
+    ( "wave-left"   . "\xe940" )
+    ( "wave-right"  . "\xe941" )
+
+    ))
+
+(provide 'data-alltheicons)
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-faicons.el b/.emacs.d.back/packages/all-the-icons/data/data-faicons.el
new file mode 100644
index 00000000..6ab04806
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-faicons.el
@@ -0,0 +1,641 @@
+(defvar all-the-icons-data/fa-icon-alist
+  '(
+
+    ("500px" . "\xf26e")
+    ("adjust" . "\xf042")
+    ("adn" . "\xf170")
+    ("align-center" . "\xf037")
+    ("align-justify" . "\xf039")
+    ("align-left" . "\xf036")
+    ("align-right" . "\xf038")
+    ("amazon" . "\xf270")
+    ("ambulance" . "\xf0f9")
+    ("american-sign-language-interpreting" . "\xf2a3")
+    ("anchor" . "\xf13d")
+    ("android" . "\xf17b")
+    ("angellist" . "\xf209")
+    ("angle-double-down" . "\xf103")
+    ("angle-double-left" . "\xf100")
+    ("angle-double-right" . "\xf101")
+    ("angle-double-up" . "\xf102")
+    ("angle-down" . "\xf107")
+    ("angle-left" . "\xf104")
+    ("angle-right" . "\xf105")
+    ("angle-up" . "\xf106")
+    ("apple" . "\xf179")
+    ("archive" . "\xf187")
+    ("area-chart" . "\xf1fe")
+    ("arrow-circle-down" . "\xf0ab")
+    ("arrow-circle-left" . "\xf0a8")
+    ("arrow-circle-o-down" . "\xf01a")
+    ("arrow-circle-o-left" . "\xf190")
+    ("arrow-circle-o-right" . "\xf18e")
+    ("arrow-circle-o-up" . "\xf01b")
+    ("arrow-circle-right" . "\xf0a9")
+    ("arrow-circle-up" . "\xf0aa")
+    ("arrow-down" . "\xf063")
+    ("arrow-left" . "\xf060")
+    ("arrow-right" . "\xf061")
+    ("arrow-up" . "\xf062")
+    ("arrows" . "\xf047")
+    ("arrows-alt" . "\xf0b2")
+    ("arrows-h" . "\xf07e")
+    ("arrows-v" . "\xf07d")
+    ("assistive-listening-systems" . "\xf2a2")
+    ("asterisk" . "\xf069")
+    ("at" . "\xf1fa")
+    ("audio-description" . "\xf29e")
+    ("backward" . "\xf04a")
+    ("balance-scale" . "\xf24e")
+    ("ban" . "\xf05e")
+    ("bar-chart" . "\xf080")
+    ("barcode" . "\xf02a")
+    ("bars" . "\xf0c9")
+    ("battery-empty" . "\xf244")
+    ("battery-full" . "\xf240")
+    ("battery-half" . "\xf242")
+    ("battery-quarter" . "\xf243")
+    ("battery-three-quarters" . "\xf241")
+    ("bed" . "\xf236")
+    ("beer" . "\xf0fc")
+    ("behance" . "\xf1b4")
+    ("behance-square" . "\xf1b5")
+    ("bell" . "\xf0f3")
+    ("bell-o" . "\xf0a2")
+    ("bell-slash" . "\xf1f6")
+    ("bell-slash-o" . "\xf1f7")
+    ("bicycle" . "\xf206")
+    ("binoculars" . "\xf1e5")
+    ("birthday-cake" . "\xf1fd")
+    ("bitbucket" . "\xf171")
+    ("bitbucket-square" . "\xf172")
+    ("black-tie" . "\xf27e")
+    ("blind" . "\xf29d")
+    ("bluetooth" . "\xf293")
+    ("bluetooth-b" . "\xf294")
+    ("bold" . "\xf032")
+    ("bolt" . "\xf0e7")
+    ("bomb" . "\xf1e2")
+    ("book" . "\xf02d")
+    ("bookmark" . "\xf02e")
+    ("bookmark-o" . "\xf097")
+    ("braille" . "\xf2a1")
+    ("briefcase" . "\xf0b1")
+    ("btc" . "\xf15a")
+    ("bug" . "\xf188")
+    ("building" . "\xf1ad")
+    ("building-o" . "\xf0f7")
+    ("bullhorn" . "\xf0a1")
+    ("bullseye" . "\xf140")
+    ("bus" . "\xf207")
+    ("buysellads" . "\xf20d")
+    ("calculator" . "\xf1ec")
+    ("calendar" . "\xf073")
+    ("calendar-check-o" . "\xf274")
+    ("calendar-minus-o" . "\xf272")
+    ("calendar-o" . "\xf133")
+    ("calendar-plus-o" . "\xf271")
+    ("calendar-times-o" . "\xf273")
+    ("camera" . "\xf030")
+    ("camera-retro" . "\xf083")
+    ("car" . "\xf1b9")
+    ("caret-down" . "\xf0d7")
+    ("caret-left" . "\xf0d9")
+    ("caret-right" . "\xf0da")
+    ("caret-square-o-down" . "\xf150")
+    ("caret-square-o-left" . "\xf191")
+    ("caret-square-o-right" . "\xf152")
+    ("caret-square-o-up" . "\xf151")
+    ("caret-up" . "\xf0d8")
+    ("cart-arrow-down" . "\xf218")
+    ("cart-plus" . "\xf217")
+    ("cc" . "\xf20a")
+    ("cc-amex" . "\xf1f3")
+    ("cc-diners-club" . "\xf24c")
+    ("cc-discover" . "\xf1f2")
+    ("cc-jcb" . "\xf24b")
+    ("cc-mastercard" . "\xf1f1")
+    ("cc-paypal" . "\xf1f4")
+    ("cc-stripe" . "\xf1f5")
+    ("cc-visa" . "\xf1f0")
+    ("certificate" . "\xf0a3")
+    ("chain-broken" . "\xf127")
+    ("check" . "\xf00c")
+    ("check-circle" . "\xf058")
+    ("check-circle-o" . "\xf05d")
+    ("check-square" . "\xf14a")
+    ("check-square-o" . "\xf046")
+    ("chevron-circle-down" . "\xf13a")
+    ("chevron-circle-left" . "\xf137")
+    ("chevron-circle-right" . "\xf138")
+    ("chevron-circle-up" . "\xf139")
+    ("chevron-down" . "\xf078")
+    ("chevron-left" . "\xf053")
+    ("chevron-right" . "\xf054")
+    ("chevron-up" . "\xf077")
+    ("child" . "\xf1ae")
+    ("chrome" . "\xf268")
+    ("circle" . "\xf111")
+    ("circle-o" . "\xf10c")
+    ("circle-o-notch" . "\xf1ce")
+    ("circle-thin" . "\xf1db")
+    ("clipboard" . "\xf0ea")
+    ("clock-o" . "\xf017")
+    ("clone" . "\xf24d")
+    ("cloud" . "\xf0c2")
+    ("cloud-download" . "\xf0ed")
+    ("cloud-upload" . "\xf0ee")
+    ("code" . "\xf121")
+    ("code-fork" . "\xf126")
+    ("codepen" . "\xf1cb")
+    ("codiepie" . "\xf284")
+    ("coffee" . "\xf0f4")
+    ("cog" . "\xf013")
+    ("cogs" . "\xf085")
+    ("columns" . "\xf0db")
+    ("comment" . "\xf075")
+    ("comment-o" . "\xf0e5")
+    ("commenting" . "\xf27a")
+    ("commenting-o" . "\xf27b")
+    ("comments" . "\xf086")
+    ("comments-o" . "\xf0e6")
+    ("compass" . "\xf14e")
+    ("compress" . "\xf066")
+    ("connectdevelop" . "\xf20e")
+    ("contao" . "\xf26d")
+    ("copyright" . "\xf1f9")
+    ("creative-commons" . "\xf25e")
+    ("credit-card" . "\xf09d")
+    ("credit-card-alt" . "\xf283")
+    ("crop" . "\xf125")
+    ("crosshairs" . "\xf05b")
+    ("css3" . "\xf13c")
+    ("cube" . "\xf1b2")
+    ("cubes" . "\xf1b3")
+    ("cutlery" . "\xf0f5")
+    ("dashcube" . "\xf210")
+    ("database" . "\xf1c0")
+    ("deaf" . "\xf2a4")
+    ("delicious" . "\xf1a5")
+    ("desktop" . "\xf108")
+    ("deviantart" . "\xf1bd")
+    ("diamond" . "\xf219")
+    ("digg" . "\xf1a6")
+    ("dot-circle-o" . "\xf192")
+    ("download" . "\xf019")
+    ("dribbble" . "\xf17d")
+    ("dropbox" . "\xf16b")
+    ("drupal" . "\xf1a9")
+    ("edge" . "\xf282")
+    ("eject" . "\xf052")
+    ("ellipsis-h" . "\xf141")
+    ("ellipsis-v" . "\xf142")
+    ("empire" . "\xf1d1")
+    ("envelope" . "\xf0e0")
+    ("envelope-o" . "\xf003")
+    ("envelope-square" . "\xf199")
+    ("envira" . "\xf299")
+    ("eraser" . "\xf12d")
+    ("eur" . "\xf153")
+    ("exchange" . "\xf0ec")
+    ("exclamation" . "\xf12a")
+    ("exclamation-circle" . "\xf06a")
+    ("exclamation-triangle" . "\xf071")
+    ("expand" . "\xf065")
+    ("expeditedssl" . "\xf23e")
+    ("external-link" . "\xf08e")
+    ("external-link-square" . "\xf14c")
+    ("eye" . "\xf06e")
+    ("eye-slash" . "\xf070")
+    ("eyedropper" . "\xf1fb")
+    ("facebook" . "\xf09a")
+    ("facebook-official" . "\xf230")
+    ("facebook-square" . "\xf082")
+    ("fast-backward" . "\xf049")
+    ("fast-forward" . "\xf050")
+    ("fax" . "\xf1ac")
+    ("female" . "\xf182")
+    ("fighter-jet" . "\xf0fb")
+    ("file" . "\xf15b")
+    ("file-archive-o" . "\xf1c6")
+    ("file-audio-o" . "\xf1c7")
+    ("file-code-o" . "\xf1c9")
+    ("file-excel-o" . "\xf1c3")
+    ("file-image-o" . "\xf1c5")
+    ("file-o" . "\xf016")
+    ("file-pdf-o" . "\xf1c1")
+    ("file-powerpoint-o" . "\xf1c4")
+    ("file-text" . "\xf15c")
+    ("file-text-o" . "\xf0f6")
+    ("file-video-o" . "\xf1c8")
+    ("file-word-o" . "\xf1c2")
+    ("files-o" . "\xf0c5")
+    ("film" . "\xf008")
+    ("filter" . "\xf0b0")
+    ("fire" . "\xf06d")
+    ("fire-extinguisher" . "\xf134")
+    ("firefox" . "\xf269")
+    ("first-order" . "\xf2b0")
+    ("flag" . "\xf024")
+    ("flag-checkered" . "\xf11e")
+    ("flag-o" . "\xf11d")
+    ("flask" . "\xf0c3")
+    ("flickr" . "\xf16e")
+    ("floppy-o" . "\xf0c7")
+    ("folder" . "\xf07b")
+    ("folder-o" . "\xf114")
+    ("folder-open" . "\xf07c")
+    ("folder-open-o" . "\xf115")
+    ("font" . "\xf031")
+    ("font-awesome" . "\xf2b4")
+    ("fonticons" . "\xf280")
+    ("fort-awesome" . "\xf286")
+    ("forumbee" . "\xf211")
+    ("forward" . "\xf04e")
+    ("foursquare" . "\xf180")
+    ("frown-o" . "\xf119")
+    ("futbol-o" . "\xf1e3")
+    ("gamepad" . "\xf11b")
+    ("gavel" . "\xf0e3")
+    ("gbp" . "\xf154")
+    ("genderless" . "\xf22d")
+    ("get-pocket" . "\xf265")
+    ("gg" . "\xf260")
+    ("gg-circle" . "\xf261")
+    ("gift" . "\xf06b")
+    ("git" . "\xf1d3")
+    ("git-square" . "\xf1d2")
+    ("github" . "\xf09b")
+    ("github-alt" . "\xf113")
+    ("github-square" . "\xf092")
+    ("gitlab" . "\xf296")
+    ("glass" . "\xf000")
+    ("glide" . "\xf2a5")
+    ("glide-g" . "\xf2a6")
+    ("globe" . "\xf0ac")
+    ("google" . "\xf1a0")
+    ("google-plus" . "\xf0d5")
+    ("google-plus-official" . "\xf2b3")
+    ("google-plus-square" . "\xf0d4")
+    ("google-wallet" . "\xf1ee")
+    ("graduation-cap" . "\xf19d")
+    ("gratipay" . "\xf184")
+    ("h-square" . "\xf0fd")
+    ("hacker-news" . "\xf1d4")
+    ("hand-lizard-o" . "\xf258")
+    ("hand-o-down" . "\xf0a7")
+    ("hand-o-left" . "\xf0a5")
+    ("hand-o-right" . "\xf0a4")
+    ("hand-o-up" . "\xf0a6")
+    ("hand-paper-o" . "\xf256")
+    ("hand-peace-o" . "\xf25b")
+    ("hand-pointer-o" . "\xf25a")
+    ("hand-rock-o" . "\xf255")
+    ("hand-scissors-o" . "\xf257")
+    ("hand-spock-o" . "\xf259")
+    ("hashtag" . "\xf292")
+    ("hdd-o" . "\xf0a0")
+    ("header" . "\xf1dc")
+    ("headphones" . "\xf025")
+    ("heart" . "\xf004")
+    ("heart-o" . "\xf08a")
+    ("heartbeat" . "\xf21e")
+    ("history" . "\xf1da")
+    ("home" . "\xf015")
+    ("hospital-o" . "\xf0f8")
+    ("hourglass" . "\xf254")
+    ("hourglass-end" . "\xf253")
+    ("hourglass-half" . "\xf252")
+    ("hourglass-o" . "\xf250")
+    ("hourglass-start" . "\xf251")
+    ("houzz" . "\xf27c")
+    ("html5" . "\xf13b")
+    ("i-cursor" . "\xf246")
+    ("ils" . "\xf20b")
+    ("inbox" . "\xf01c")
+    ("indent" . "\xf03c")
+    ("industry" . "\xf275")
+    ("info" . "\xf129")
+    ("info-circle" . "\xf05a")
+    ("inr" . "\xf156")
+    ("instagram" . "\xf16d")
+    ("internet-explorer" . "\xf26b")
+    ("ioxhost" . "\xf208")
+    ("italic" . "\xf033")
+    ("joomla" . "\xf1aa")
+    ("jpy" . "\xf157")
+    ("jsfiddle" . "\xf1cc")
+    ("key" . "\xf084")
+    ("keyboard-o" . "\xf11c")
+    ("krw" . "\xf159")
+    ("language" . "\xf1ab")
+    ("laptop" . "\xf109")
+    ("lastfm" . "\xf202")
+    ("lastfm-square" . "\xf203")
+    ("leaf" . "\xf06c")
+    ("leanpub" . "\xf212")
+    ("lemon-o" . "\xf094")
+    ("level-down" . "\xf149")
+    ("level-up" . "\xf148")
+    ("life-ring" . "\xf1cd")
+    ("lightbulb-o" . "\xf0eb")
+    ("line-chart" . "\xf201")
+    ("link" . "\xf0c1")
+    ("linkedin" . "\xf0e1")
+    ("linkedin-square" . "\xf08c")
+    ("linux" . "\xf17c")
+    ("list" . "\xf03a")
+    ("list-alt" . "\xf022")
+    ("list-ol" . "\xf0cb")
+    ("list-ul" . "\xf0ca")
+    ("location-arrow" . "\xf124")
+    ("lock" . "\xf023")
+    ("long-arrow-down" . "\xf175")
+    ("long-arrow-left" . "\xf177")
+    ("long-arrow-right" . "\xf178")
+    ("long-arrow-up" . "\xf176")
+    ("low-vision" . "\xf2a8")
+    ("magic" . "\xf0d0")
+    ("magnet" . "\xf076")
+    ("male" . "\xf183")
+    ("map" . "\xf279")
+    ("map-marker" . "\xf041")
+    ("map-o" . "\xf278")
+    ("map-pin" . "\xf276")
+    ("map-signs" . "\xf277")
+    ("mars" . "\xf222")
+    ("mars-double" . "\xf227")
+    ("mars-stroke" . "\xf229")
+    ("mars-stroke-h" . "\xf22b")
+    ("mars-stroke-v" . "\xf22a")
+    ("maxcdn" . "\xf136")
+    ("meanpath" . "\xf20c")
+    ("medium" . "\xf23a")
+    ("medkit" . "\xf0fa")
+    ("meh-o" . "\xf11a")
+    ("mercury" . "\xf223")
+    ("microphone" . "\xf130")
+    ("microphone-slash" . "\xf131")
+    ("minus" . "\xf068")
+    ("minus-circle" . "\xf056")
+    ("minus-square" . "\xf146")
+    ("minus-square-o" . "\xf147")
+    ("mixcloud" . "\xf289")
+    ("mobile" . "\xf10b")
+    ("modx" . "\xf285")
+    ("money" . "\xf0d6")
+    ("moon-o" . "\xf186")
+    ("motorcycle" . "\xf21c")
+    ("mouse-pointer" . "\xf245")
+    ("music" . "\xf001")
+    ("neuter" . "\xf22c")
+    ("newspaper-o" . "\xf1ea")
+    ("object-group" . "\xf247")
+    ("object-ungroup" . "\xf248")
+    ("odnoklassniki" . "\xf263")
+    ("odnoklassniki-square" . "\xf264")
+    ("opencart" . "\xf23d")
+    ("openid" . "\xf19b")
+    ("opera" . "\xf26a")
+    ("optin-monster" . "\xf23c")
+    ("outdent" . "\xf03b")
+    ("pagelines" . "\xf18c")
+    ("paint-brush" . "\xf1fc")
+    ("paper-plane" . "\xf1d8")
+    ("paper-plane-o" . "\xf1d9")
+    ("paperclip" . "\xf0c6")
+    ("paragraph" . "\xf1dd")
+    ("pause" . "\xf04c")
+    ("pause-circle" . "\xf28b")
+    ("pause-circle-o" . "\xf28c")
+    ("paw" . "\xf1b0")
+    ("paypal" . "\xf1ed")
+    ("pencil" . "\xf040")
+    ("pencil-square" . "\xf14b")
+    ("pencil-square-o" . "\xf044")
+    ("percent" . "\xf295")
+    ("phone" . "\xf095")
+    ("phone-square" . "\xf098")
+    ("picture-o" . "\xf03e")
+    ("pie-chart" . "\xf200")
+    ("pied-piper" . "\xf2ae")
+    ("pied-piper-alt" . "\xf1a8")
+    ("pied-piper-pp" . "\xf1a7")
+    ("pinterest" . "\xf0d2")
+    ("pinterest-p" . "\xf231")
+    ("pinterest-square" . "\xf0d3")
+    ("plane" . "\xf072")
+    ("play" . "\xf04b")
+    ("play-circle" . "\xf144")
+    ("play-circle-o" . "\xf01d")
+    ("plug" . "\xf1e6")
+    ("plus" . "\xf067")
+    ("plus-circle" . "\xf055")
+    ("plus-square" . "\xf0fe")
+    ("plus-square-o" . "\xf196")
+    ("power-off" . "\xf011")
+    ("print" . "\xf02f")
+    ("product-hunt" . "\xf288")
+    ("puzzle-piece" . "\xf12e")
+    ("qq" . "\xf1d6")
+    ("qrcode" . "\xf029")
+    ("question" . "\xf128")
+    ("question-circle" . "\xf059")
+    ("question-circle-o" . "\xf29c")
+    ("quote-left" . "\xf10d")
+    ("quote-right" . "\xf10e")
+    ("random" . "\xf074")
+    ("rebel" . "\xf1d0")
+    ("recycle" . "\xf1b8")
+    ("reddit" . "\xf1a1")
+    ("reddit-alien" . "\xf281")
+    ("reddit-square" . "\xf1a2")
+    ("refresh" . "\xf021")
+    ("registered" . "\xf25d")
+    ("renren" . "\xf18b")
+    ("repeat" . "\xf01e")
+    ("reply" . "\xf112")
+    ("reply-all" . "\xf122")
+    ("retweet" . "\xf079")
+    ("road" . "\xf018")
+    ("rocket" . "\xf135")
+    ("rss" . "\xf09e")
+    ("rss-square" . "\xf143")
+    ("rub" . "\xf158")
+    ("safari" . "\xf267")
+    ("scissors" . "\xf0c4")
+    ("scribd" . "\xf28a")
+    ("search" . "\xf002")
+    ("search-minus" . "\xf010")
+    ("search-plus" . "\xf00e")
+    ("sellsy" . "\xf213")
+    ("server" . "\xf233")
+    ("share" . "\xf064")
+    ("share-alt" . "\xf1e0")
+    ("share-alt-square" . "\xf1e1")
+    ("share-square" . "\xf14d")
+    ("share-square-o" . "\xf045")
+    ("shield" . "\xf132")
+    ("ship" . "\xf21a")
+    ("shirtsinbulk" . "\xf214")
+    ("shopping-bag" . "\xf290")
+    ("shopping-basket" . "\xf291")
+    ("shopping-cart" . "\xf07a")
+    ("sign-in" . "\xf090")
+    ("sign-language" . "\xf2a7")
+    ("sign-out" . "\xf08b")
+    ("signal" . "\xf012")
+    ("simplybuilt" . "\xf215")
+    ("sitemap" . "\xf0e8")
+    ("skyatlas" . "\xf216")
+    ("skype" . "\xf17e")
+    ("slack" . "\xf198")
+    ("sliders" . "\xf1de")
+    ("slideshare" . "\xf1e7")
+    ("smile-o" . "\xf118")
+    ("snapchat" . "\xf2ab")
+    ("snapchat-ghost" . "\xf2ac")
+    ("snapchat-square" . "\xf2ad")
+    ("sort" . "\xf0dc")
+    ("sort-alpha-asc" . "\xf15d")
+    ("sort-alpha-desc" . "\xf15e")
+    ("sort-amount-asc" . "\xf160")
+    ("sort-amount-desc" . "\xf161")
+    ("sort-asc" . "\xf0de")
+    ("sort-desc" . "\xf0dd")
+    ("sort-numeric-asc" . "\xf162")
+    ("sort-numeric-desc" . "\xf163")
+    ("soundcloud" . "\xf1be")
+    ("space-shuttle" . "\xf197")
+    ("spinner" . "\xf110")
+    ("spoon" . "\xf1b1")
+    ("spotify" . "\xf1bc")
+    ("square" . "\xf0c8")
+    ("square-o" . "\xf096")
+    ("stack-exchange" . "\xf18d")
+    ("stack-overflow" . "\xf16c")
+    ("star" . "\xf005")
+    ("star-half" . "\xf089")
+    ("star-half-o" . "\xf123")
+    ("star-o" . "\xf006")
+    ("steam" . "\xf1b6")
+    ("steam-square" . "\xf1b7")
+    ("step-backward" . "\xf048")
+    ("step-forward" . "\xf051")
+    ("stethoscope" . "\xf0f1")
+    ("sticky-note" . "\xf249")
+    ("sticky-note-o" . "\xf24a")
+    ("stop" . "\xf04d")
+    ("stop-circle" . "\xf28d")
+    ("stop-circle-o" . "\xf28e")
+    ("street-view" . "\xf21d")
+    ("strikethrough" . "\xf0cc")
+    ("stumbleupon" . "\xf1a4")
+    ("stumbleupon-circle" . "\xf1a3")
+    ("subscript" . "\xf12c")
+    ("subway" . "\xf239")
+    ("suitcase" . "\xf0f2")
+    ("sun-o" . "\xf185")
+    ("superscript" . "\xf12b")
+    ("table" . "\xf0ce")
+    ("tablet" . "\xf10a")
+    ("tachometer" . "\xf0e4")
+    ("tag" . "\xf02b")
+    ("tags" . "\xf02c")
+    ("tasks" . "\xf0ae")
+    ("taxi" . "\xf1ba")
+    ("television" . "\xf26c")
+    ("tencent-weibo" . "\xf1d5")
+    ("terminal" . "\xf120")
+    ("text-height" . "\xf034")
+    ("text-width" . "\xf035")
+    ("th" . "\xf00a")
+    ("th-large" . "\xf009")
+    ("th-list" . "\xf00b")
+    ("themeisle" . "\xf2b2")
+    ("thumb-tack" . "\xf08d")
+    ("thumbs-down" . "\xf165")
+    ("thumbs-o-down" . "\xf088")
+    ("thumbs-o-up" . "\xf087")
+    ("thumbs-up" . "\xf164")
+    ("ticket" . "\xf145")
+    ("times" . "\xf00d")
+    ("times-circle" . "\xf057")
+    ("times-circle-o" . "\xf05c")
+    ("tint" . "\xf043")
+    ("toggle-off" . "\xf204")
+    ("toggle-on" . "\xf205")
+    ("trademark" . "\xf25c")
+    ("train" . "\xf238")
+    ("transgender" . "\xf224")
+    ("transgender-alt" . "\xf225")
+    ("trash" . "\xf1f8")
+    ("trash-o" . "\xf014")
+    ("tree" . "\xf1bb")
+    ("trello" . "\xf181")
+    ("tripadvisor" . "\xf262")
+    ("trophy" . "\xf091")
+    ("truck" . "\xf0d1")
+    ("try" . "\xf195")
+    ("tty" . "\xf1e4")
+    ("tumblr" . "\xf173")
+    ("tumblr-square" . "\xf174")
+    ("twitch" . "\xf1e8")
+    ("twitter" . "\xf099")
+    ("twitter-square" . "\xf081")
+    ("umbrella" . "\xf0e9")
+    ("underline" . "\xf0cd")
+    ("undo" . "\xf0e2")
+    ("universal-access" . "\xf29a")
+    ("university" . "\xf19c")
+    ("unlock" . "\xf09c")
+    ("unlock-alt" . "\xf13e")
+    ("upload" . "\xf093")
+    ("usb" . "\xf287")
+    ("usd" . "\xf155")
+    ("user" . "\xf007")
+    ("user-md" . "\xf0f0")
+    ("user-plus" . "\xf234")
+    ("user-secret" . "\xf21b")
+    ("user-times" . "\xf235")
+    ("users" . "\xf0c0")
+    ("venus" . "\xf221")
+    ("venus-double" . "\xf226")
+    ("venus-mars" . "\xf228")
+    ("viacoin" . "\xf237")
+    ("viadeo" . "\xf2a9")
+    ("viadeo-square" . "\xf2aa")
+    ("video-camera" . "\xf03d")
+    ("vimeo" . "\xf27d")
+    ("vimeo-square" . "\xf194")
+    ("vine" . "\xf1ca")
+    ("vk" . "\xf189")
+    ("volume-control-phone" . "\xf2a0")
+    ("volume-down" . "\xf027")
+    ("volume-off" . "\xf026")
+    ("volume-up" . "\xf028")
+    ("weibo" . "\xf18a")
+    ("weixin" . "\xf1d7")
+    ("whatsapp" . "\xf232")
+    ("wheelchair" . "\xf193")
+    ("wheelchair-alt" . "\xf29b")
+    ("wifi" . "\xf1eb")
+    ("wikipedia-w" . "\xf266")
+    ("windows" . "\xf17a")
+    ("wordpress" . "\xf19a")
+    ("wpbeginner" . "\xf297")
+    ("wpforms" . "\xf298")
+    ("wrench" . "\xf0ad")
+    ("xing" . "\xf168")
+    ("xing-square" . "\xf169")
+    ("y-combinator" . "\xf23b")
+    ("yahoo" . "\xf19e")
+    ("yelp" . "\xf1e9")
+    ("yoast" . "\xf2b1")
+    ("youtube" . "\xf167")
+    ("youtube-play" . "\xf16a")
+    ("youtube-square" . "\xf166")
+
+    ))
+
+(provide 'data-faicons)
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-fileicons.el b/.emacs.d.back/packages/all-the-icons/data/data-fileicons.el
new file mode 100644
index 00000000..acc465fb
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-fileicons.el
@@ -0,0 +1,487 @@
+(defvar all-the-icons-data/file-icon-alist
+  '(
+		
+    ( "1c" . "\xa5ea" )
+    ( "1c-alt" . "\xea28" )
+    ( "MJML" . "\xea6f" )
+    ( "R" . "\xe905" )
+    ( "abap" . "\xe92b" )
+    ( "abif" . "\xea4e" )
+    ( "access" . "\xe9ea" )
+    ( "actionscript" . "\xe92e" )
+    ( "ada" . "\xe90b" )
+    ( "ae" . "\xe9f3" )
+    ( "ai" . "\xe6b4" )
+    ( "akka" . "\xea0e" )
+    ( "alex" . "\x29cb" )
+    ( "alloy" . "\xe935" )
+    ( "alpine-linux" . "\xe9ff" )
+    ( "ampl" . "\xe94e" )
+    ( "amx" . "\xe99b" )
+    ( "angelscript" . "\xea5b" )
+    ( "ansible" . "\x24b6" )
+    ( "ansible-alt" . "\x61" )
+    ( "ant" . "\xe93e" )
+    ( "antlr" . "\xe92c" )
+    ( "antwar" . "\x2591" )
+    ( "api-blueprint" . "\xe92d" )
+    ( "apl" . "\x234b" )
+    ( "apl-old" . "\xe909" )
+    ( "apple" . "\xe925" )
+    ( "appveyor" . "\xe923" )
+    ( "arc" . "\xe92f" )
+    ( "arch-linux" . "\x41" )
+    ( "arduino" . "\xe930" )
+    ( "arttext" . "\x24d0" )
+    ( "asciidoc" . "\xe918" )
+    ( "ats" . "\xe934" )
+    ( "audacity" . "\xe9f9" )
+    ( "augeas" . "\xe931" )
+    ( "aurelia" . "\xea48" )
+    ( "auto-hotkey" . "\xe932" )
+    ( "autoit" . "\xe933" )
+    ( "babel" . "\xe91f" )
+    ( "bazel" . "\xea5a" )
+    ( "bem" . "\xea59" )
+    ( "bib" . "\xe601" )
+    ( "bintray" . "\xea6e" )
+    ( "bithound" . "\xea2a" )
+    ( "blender" . "\xe9fa" )
+    ( "bluespec" . "\xe93c" )
+    ( "boo" . "\xe939" )
+    ( "brain" . "\xe93a" )
+    ( "brakeman" . "\xe9d6" )
+    ( "bro" . "\xe93b" )
+    ( "broccoli" . "\xe922" )
+    ( "brotli" . "\xea6c" )
+    ( "browserslist" . "\xea80" )
+    ( "brunch" . "\xea47" )
+    ( "buck" . "\xea46" )
+    ( "build-boot" . "\xf103" )
+    ( "bundler" . "\xea45" )
+    ( "byond" . "\xe962" )
+    ( "cabal" . "\xe9c2" )
+    ( "caddy" . "\xea58" )
+    ( "cake" . "\xe9e3" )
+    ( "cakefile" . "\xe924" )
+    ( "cakephp" . "\xea43" )
+    ( "cakephp-old" . "\xe9d3" )
+    ( "cc" . "\xe9d5" )
+    ( "ceylon" . "\xe94f" )
+    ( "chai" . "\x63" )
+    ( "chapel" . "\xe950" )
+    ( "chartjs" . "\xea0b" )
+    ( "chef" . "\xea42" )
+    ( "chuck" . "\xe943" )
+    ( "circle-ci" . "\xea12" )
+    ( "cirru" . "\xe951" )
+    ( "ckeditor" . "\xea0c" )
+    ( "clarion" . "\xe952" )
+    ( "clean" . "\xe95b" )
+    ( "click" . "\xe95c" )
+    ( "clips" . "\xe940" )
+    ( "clj" . "\xf105" )
+    ( "cljs" . "\xf104" )
+    ( "closure-template" . "\xea82" )
+    ( "cmake" . "\xe93f" )
+    ( "cobol" . "\xea44" )
+    ( "codecov" . "\x2602" )
+    ( "codekit" . "\xea41" )
+    ( "codemirror" . "\xea0d" )
+    ( "codeship" . "\xea6a" )
+    ( "cold-fusion" . "\xe929" )
+    ( "clisp" . "\xe972" )
+    ( "composer" . "\xe683" )
+    ( "config" . "\xf07c" )
+    ( "coq" . "\xe95f" )
+    ( "cordova" . "\xea11" )
+    ( "cp" . "\xe942" )
+    ( "cpan" . "\xea87" )
+    ( "creole" . "\xe95e" )
+    ( "crystal" . "\xe902" )
+    ( "cs-script" . "\xe9e2" )
+    ( "csound" . "\xe9f0" )
+    ( "cucumber" . "\xf02b" )
+    ( "cython" . "\xe963" )
+    ( "d3" . "\xea10" )
+    ( "darcs" . "\xe964" )
+    ( "dashboard" . "\xf07d" )
+    ( "dbase" . "\xe9f1" )
+    ( "default" . "\x1f5cc" )
+    ( "delphi" . "\xea40" )
+    ( "devicetree" . "\xea57" )
+    ( "diff" . "\xe960" )
+    ( "dockerfile" . "\xf106" )
+    ( "doclets" . "\xea3f" )
+    ( "doge" . "\xe946" )
+    ( "dom" . "\xea71" )
+    ( "donejs" . "\x1f3c1" )
+    ( "doxygen" . "\xe928" )
+    ( "dragula" . "\x1f44c" )
+    ( "drone" . "\xea3d" )
+    ( "dyalog" . "\xe90c" )
+    ( "dylib" . "\xea15" )
+    ( "e" . "\x45" )
+    ( "eagle" . "\xe965" )
+    ( "easybuild" . "\xea85" )
+    ( "ec" . "\xe9c9" )
+    ( "ecere" . "\xe966" )
+    ( "edge" . "\xea78" )
+    ( "editorconfig" . "\xea1b" )
+    ( "eiffel" . "\xe967" )
+    ( "ejs" . "\xea4b" )
+    ( "electron" . "\xea27" )
+    ( "elm" . "\xf102" )
+    ( "emacs" . "\xe926" )
+    ( "elisp" . "\xe926" )
+    ( "ember" . "\xe61b" )
+    ( "emberscript" . "\xe968" )
+    ( "eq" . "\xea0a" )
+    ( "esdoc" . "\xea5c" )
+    ( "eslint" . "\xea0f" )
+    ( "eslint-old" . "\xe90e" )
+    ( "excel" . "\xe9ee" )
+    ( "fabfile" . "\xe94b" )
+    ( "factor" . "\xe96a" )
+    ( "fancy" . "\xe96b" )
+    ( "fantom" . "\xe96f" )
+    ( "fbx" . "\xe9fc" )
+    ( "ffmpeg" . "\xea22" )
+    ( "finder" . "\xe9e9" )
+    ( "firebase" . "\xea7f" )
+    ( "flow" . "\xe921" )
+    ( "flux" . "\xe969" )
+    ( "font" . "\xe90f" )
+    ( "fontforge" . "\xfb00" )
+    ( "fortran" . "\xe90a" )
+    ( "franca" . "\xea56" )
+    ( "freemarker" . "\xe970" )
+    ( "frege" . "\xe96e" )
+    ( "fuel-ux" . "\xea09" )
+    ( "gams" . "\xe973" )
+    ( "gap" . "\xe971" )
+    ( "gdb" . "\xea08" )
+    ( "genshi" . "\xe976" )
+    ( "gentoo" . "\xe96d" )
+    ( "gf" . "\xe978" )
+    ( "gitlab" . "\xea3c" )
+    ( "glade" . "\xe938" )
+    ( "glyphs" . "\x47" )
+    ( "gn" . "\xea25" )
+    ( "gnu" . "\xe679" )
+    ( "go" . "\xe624" )
+    ( "godot" . "\xe974" )
+    ( "golo" . "\xe979" )
+    ( "gosu" . "\xe97a" )
+    ( "gradle" . "\xe903" )
+    ( "graphql" . "\xe97c" )
+    ( "graphviz" . "\xe97d" )
+    ( "groovy" . "\xe904" )
+    ( "grunt" . "\xe611" )
+    ( "gulp" . "\xe610" )
+    ( "hack" . "\xe9ce" )
+    ( "haml" . "\xf15b" )
+    ( "harbour" . "\xe97b" )
+    ( "hashicorp" . "\xe97e" )
+    ( "haxe" . "\xe907" )
+    ( "haxedevelop" . "\xea3b" )
+    ( "hg" . "\x263f" )
+    ( "hoplon" . "\xea4d" )
+    ( "hy" . "\xe97f" )
+    ( "icu" . "\xea23" )
+    ( "id" . "\xe9f4" )
+    ( "idl" . "\xe947" )
+    ( "idris" . "\xe983" )
+    ( "igorpro" . "\xe980" )
+    ( "image" . "\xf012" )
+    ( "inform7" . "\xe984" )
+    ( "inno" . "\xe985" )
+    ( "io" . "\xe981" )
+    ( "ioke" . "\xe982" )
+    ( "ionic-project" . "\xf14b" )
+    ( "isabelle" . "\xe945" )
+    ( "j" . "\xe937" )
+    ( "jade" . "\xe90d" )
+    ( "jake" . "\xe948" )
+    ( "jasmine" . "\xea3a" )
+    ( "jenkins" . "\xe667" )
+    ( "jest" . "\xea39" )
+    ( "jinja" . "\xe944" )
+    ( "jison" . "\xea55" )
+    ( "jolie" . "\xea75" )
+    ( "jsonld" . "\xe958" )
+    ( "jsx" . "\xf100" )
+    ( "jsx-2" . "\xf101" )
+    ( "jsx2-alt" . "\xe9e6" )
+    ( "julia" . "\x26ec" )
+    ( "junos" . "\xea81" )
+    ( "jupyter" . "\xe987" )
+    ( "karma" . "\xe9cd" )
+    ( "keynote" . "\xe9e5" )
+    ( "khronos" . "\xe9f8" )
+    ( "kicad" . "\xea4c" )
+    ( "kitchenci" . "\xea38" )
+    ( "kivy" . "\xe901" )
+    ( "knockout" . "\x4b" )
+    ( "kotlin" . "\xe989" )
+    ( "krl" . "\xe988" )
+    ( "labview" . "\xe98a" )
+    ( "lasso" . "\xe98c" )
+    ( "leaflet" . "\xea07" )
+    ( "lean" . "\x4c" )
+    ( "lerna" . "\xea37" )
+    ( "lfe" . "\xe94c" )
+    ( "libuv" . "\xea21" )
+    ( "lightwave" . "\xe9fb" )
+    ( "lime" . "\xea36" )
+    ( "lisp" . "\xe908" )
+    ( "livescript" . "\xe914" )
+    ( "llvm" . "\xe91d" )
+    ( "logtalk" . "\xe98d" )
+    ( "lookml" . "\xe98e" )
+    ( "lsl" . "\xe98b" )
+    ( "lua" . "\xe91b" )
+    ( "mako" . "\xe98f" )
+    ( "man-page" . "\xe936" )
+    ( "mapbox" . "\xe941" )
+    ( "markdownlint" . "\xf0c9" )
+    ( "marko" . "\xe920" )
+    ( "mathematica" . "\xe990" )
+    ( "mathjax" . "\xea06" )
+    ( "matlab" . "\xe991" )
+    ( "max" . "\xe993" )
+    ( "maxscript" . "\xe900" )
+    ( "maya" . "\xe9f6" )
+    ( "mediawiki" . "\xe954" )
+    ( "mercury" . "\xe994" )
+    ( "meson" . "\xea54" )
+    ( "metal" . "\x4d" )
+    ( "meteor" . "\xe6a5" )
+    ( "microsoft-infopath" . "\xea35" )
+    ( "minecraft" . "\xe9dc" )
+    ( "minizinc" . "\xea53" )
+    ( "mirah" . "\xe995" )
+    ( "miranda" . "\xea52" )
+    ( "mocha" . "\x26fe" )
+    ( "modula-2" . "\xe996" )
+    ( "moment" . "\x1f558" )
+    ( "moment-tz" . "\x1f30d" )
+    ( "monkey" . "\xe997" )
+    ( "moustache" . "\xe60f" )
+    ( "mruby" . "\xea18" )
+    ( "mupad" . "\xe9ca" )
+    ( "nano" . "\xea76" )
+    ( "nanoc" . "\xea51" )
+    ( "nant" . "\xe9e1" )
+    ( "nasm" . "\xea72" )
+    ( "neko" . "\xea05" )
+    ( "netlogo" . "\xe99c" )
+    ( "new-relic" . "\xe9d7" )
+    ( "nginx" . "\xf146b" )
+    ( "nib" . "\x2712" )
+    ( "nimrod" . "\xe998" )
+    ( "nit" . "\xe999" )
+    ( "nix" . "\xe99a" )
+    ( "nmap" . "\xe94d" )
+    ( "nodemon" . "\xea26" )
+    ( "normalize" . "\xea04" )
+    ( "npm" . "\xe91c" )
+    ( "npm-old" . "\xf17b" )
+    ( "nsis" . "\xea1e" )
+    ( "nsis-old" . "\xe992" )
+    ( "nuclide" . "\xea34" )
+    ( "nuget" . "\xe9d9" )
+    ( "numpy" . "\xe99d" )
+    ( "nunjucks" . "\xe953" )
+    ( "nvidia" . "\xe95d" )
+    ( "nxc" . "\xea6b" )
+    ( "obj" . "\xe9e8" )
+    ( "objective-j" . "\xe99e" )
+    ( "ocaml" . "\xe91a" )
+    ( "octave" . "\xea33" )
+    ( "onenote" . "\xe9eb" )
+    ( "ooc" . "\xe9cb" )
+    ( "opa" . "\x2601" )
+    ( "opencl" . "\xe99f" )
+    ( "opengl" . "\xea7a" )
+    ( "openoffice" . "\xe9e4" )
+    ( "openscad" . "\xe911" )
+    ( "org" . "\xe917" )
+    ( "owl" . "\xe957" )
+    ( "ox" . "\xe9a1" )
+    ( "oxygene" . "\xe9bf" )
+    ( "oz" . "\xe9be" )
+    ( "p4" . "\xea50" )
+    ( "pan" . "\xe9bd" )
+    ( "papyrus" . "\xe9bc" )
+    ( "parrot" . "\xe9bb" )
+    ( "pascal" . "\xe92a" )
+    ( "patch" . "\xe961" )
+    ( "pawn" . "\x265f" )
+    ( "pb" . "\xea14" )
+    ( "pegjs" . "\xea74" )
+    ( "perl6" . "\xe96c" )
+    ( "phalcon" . "\xe94a" )
+    ( "phoenix" . "\xea5f" )
+    ( "php" . "\xf147" )
+    ( "phpunit" . "\xea32" )
+    ( "pickle" . "\xe9c4" )
+    ( "pike" . "\xe9b9" )
+    ( "platformio" . "\xea2c" )
+    ( "pm2" . "\x2630" )
+    ( "pod" . "\xea84" )
+    ( "pogo" . "\xe9b8" )
+    ( "pointwise" . "\xe977" )
+    ( "polymer" . "\xea2b" )
+    ( "pony" . "\xe9b7" )
+    ( "postcss" . "\xe910" )
+    ( "postscript" . "\xe955" )
+    ( "povray" . "\x50" )
+    ( "powerpoint" . "\xe9ec" )
+    ( "powershell" . "\xe9da" )
+    ( "precision" . "\x2295" )
+    ( "premiere" . "\xe9f5" )
+    ( "processing" . "\xe9a0" )
+    ( "progress" . "\xe9c0" )
+    ( "propeller" . "\xe9b5" )
+    ( "proselint" . "\xea6d" )
+    ( "protractor" . "\xe9de" )
+    ( "ps" . "\xe6b8" )
+    ( "pug" . "\xea13" )
+    ( "pug-alt" . "\xe9d0" )
+    ( "puppet" . "\xf0c3" )
+    ( "purebasic" . "\x1b5" )
+    ( "purescript" . "\xe9b2" )
+    ( "racket" . "\xe9b1" )
+    ( "raml" . "\xe913" )
+    ( "rascal" . "\xea24" )
+    ( "rdoc" . "\xe9b0" )
+    ( "realbasic" . "\xe9af" )
+    ( "reason" . "\xea1d" )
+    ( "rebol" . "\xe9ae" )
+    ( "red" . "\xe9ad" )
+    ( "redux" . "\xea30" )
+    ( "regex" . "\x2a" )
+    ( "rexx" . "\xea16" )
+    ( "rhino" . "\xea4a" )
+    ( "ring" . "\x1f48d" )
+    ( "riot" . "\xe919" )
+    ( "robot" . "\xe9ac" )
+    ( "rollup" . "\xea20" )
+    ( "rollup-old" . "\xe9fd" )
+    ( "rot" . "\x1f764" )
+    ( "rspec" . "\xea31" )
+    ( "rst" . "\xe9cc" )
+    ( "sage" . "\xe9ab" )
+    ( "saltstack" . "\xe915" )
+    ( "sas" . "\xe95a" )
+    ( "sbt" . "\xe9d2" )
+    ( "sc" . "\xe9a2" )
+    ( "scheme" . "\x3bb" )
+    ( "scilab" . "\xe9a9" )
+    ( "scrutinizer" . "\xe9d4" )
+    ( "self" . "\xe9a8" )
+    ( "sequelize" . "\xea2f" )
+    ( "sf" . "\xe9db" )
+    ( "shen" . "\xe9a7" )
+    ( "shipit" . "\x26f5" )
+    ( "shippable" . "\xea2d" )
+    ( "shopify" . "\xe9cf" )
+    ( "shuriken" . "\x272b" )
+    ( "silverstripe" . "\xe800" )
+    ( "sinatra" . "\xea03" )
+    ( "sketch" . "\xe927" )
+    ( "sketchup-layout" . "\xea7c" )
+    ( "sketchup-make" . "\xea7e" )
+    ( "sketchup-stylebuilder" . "\xea7d" )
+    ( "slash" . "\xe9a6" )
+    ( "snyk" . "\xea1c" )
+    ( "solidity" . "\xea86" )
+    ( "sparql" . "\xe959" )
+    ( "spray" . "\xea02" )
+    ( "sqf" . "\xe9a5" )
+    ( "sqlite" . "\xe9dd" )
+    ( "squarespace" . "\xea5e" )
+    ( "stan" . "\xe9a4" )
+    ( "stata" . "\xe9a3" )
+    ( "storyist" . "\xe9ef" )
+    ( "strings" . "\xe9e0" )
+    ( "stylelint" . "\xe93d" )
+    ( "stylus" . "\x73" )
+    ( "stylus-full" . "\xe9f7" )
+    ( "stylus-orb" . "\x53" )
+    ( "sublime" . "\xe986" )
+    ( "sv" . "\xe9c3" )
+    ( "svn" . "\xea17" )
+    ( "swagger" . "\xea29" )
+    ( "tag" . "\xf015" )
+    ( "tcl" . "\xe956" )
+    ( "telegram" . "\x2708" )
+    ( "terminal" . "\xf0c8" )
+    ( "tern" . "\x1f54a" )
+    ( "terraform" . "\xe916" )
+    ( "test-coffeescript" . "\xea62" )
+    ( "test-dir" . "\xea60" )
+    ( "test-generic" . "\xea63" )
+    ( "test-js" . "\xea64" )
+    ( "test-perl" . "\xea65" )
+    ( "test-python" . "\xea66" )
+    ( "test-react" . "\xea67" )
+    ( "test-ruby" . "\xea68" )
+    ( "test-typescript" . "\xea69" )
+    ( "tex" . "\xe600" )
+    ( "textile" . "\x74" )
+    ( "textmate" . "\x2122" )
+    ( "thor" . "\xe9d8" )
+    ( "tinymce" . "\xea01" )
+    ( "tsx" . "\xe9d1" )
+    ( "tsx-alt" . "\xe9e7" )
+    ( "tt" . "\x54" )
+    ( "turing" . "\xe9b6" )
+    ( "twig" . "\x2e19" )
+    ( "twine" . "\xea5d" )
+    ( "txl" . "\xe9c1" )
+    ( "typedoc" . "\xe9fe" )
+    ( "typescript" . "\xe912" )
+    ( "typescript-alt" . "\x2a6" )
+    ( "typings" . "\xe9df" )
+    ( "uno" . "\xe9b3" )
+    ( "unreal" . "\x75" )
+    ( "urweb" . "\xe9ba" )
+    ( "v8" . "\xea1f" )
+    ( "vagrant" . "\x56" )
+    ( "vcl" . "\xe9b4" )
+    ( "verilog" . "\xe949" )
+    ( "vertex-shader" . "\xea79" )
+    ( "vhdl" . "\xe9aa" )
+    ( "video" . "\xf057" )
+    ( "virtualbox" . "\xea3e" )
+    ( "virtualbox-alt" . "\xea2e" )
+    ( "visio" . "\xea83" )
+    ( "vmware" . "\xea49" )
+    ( "vue" . "\xe906" )
+    ( "wasm" . "\xea70" )
+    ( "watchman" . "\xea4f" )
+    ( "webgl" . "\xea7b" )
+    ( "webpack" . "\xea61" )
+    ( "webpack-old" . "\xe91e" )
+    ( "wercker" . "\xea19" )
+    ( "word" . "\xe9ed" )
+    ( "x10" . "\x2169" )
+    ( "xamarin" . "\xea77" )
+    ( "xmos" . "\x58" )
+    ( "xpages" . "\xe9c5" )
+    ( "xtend" . "\xe9c6" )
+    ( "yarn" . "\xea1a" )
+    ( "yasm" . "\xea73" )
+    ( "yin-yang" . "\x262f" )
+    ( "yoyo" . "\xe975" )
+    ( "yui" . "\xea00" )
+    ( "zbrush" . "\xe9f2" )
+    ( "zephir" . "\xe9c7" )
+    ( "zimpl" . "\xe9c8" )
+    
+    )
+  )
+
+(provide 'data-fileicons)
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-material.el b/.emacs.d.back/packages/all-the-icons/data/data-material.el
new file mode 100644
index 00000000..bafcfe78
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-material.el
@@ -0,0 +1,935 @@
+(defvar all-the-icons-data/material-icons-alist
+  '(("3d_rotation" . "\xe84d")
+    ("ac_unit" . "\xeb3b")
+    ("access_alarm" . "\xe190")
+    ("access_alarms" . "\xe191")
+    ("access_time" . "\xe192")
+    ("accessibility" . "\xe84e")
+    ("accessible" . "\xe914")
+    ("account_balance" . "\xe84f")
+    ("account_balance_wallet" . "\xe850")
+    ("account_box" . "\xe851")
+    ("account_circle" . "\xe853")
+    ("adb" . "\xe60e")
+    ("add" . "\xe145")
+    ("add_a_photo" . "\xe439")
+    ("add_alarm" . "\xe193")
+    ("add_alert" . "\xe003")
+    ("add_box" . "\xe146")
+    ("add_circle" . "\xe147")
+    ("add_circle_outline" . "\xe148")
+    ("add_location" . "\xe567")
+    ("add_shopping_cart" . "\xe854")
+    ("add_to_photos" . "\xe39d")
+    ("add_to_queue" . "\xe05c")
+    ("adjust" . "\xe39e")
+    ("airline_seat_flat" . "\xe630")
+    ("airline_seat_flat_angled" . "\xe631")
+    ("airline_seat_individual_suite" . "\xe632")
+    ("airline_seat_legroom_extra" . "\xe633")
+    ("airline_seat_legroom_normal" . "\xe634")
+    ("airline_seat_legroom_reduced" . "\xe635")
+    ("airline_seat_recline_extra" . "\xe636")
+    ("airline_seat_recline_normal" . "\xe637")
+    ("airplanemode_active" . "\xe195")
+    ("airplanemode_inactive" . "\xe194")
+    ("airplay" . "\xe055")
+    ("airport_shuttle" . "\xeb3c")
+    ("alarm" . "\xe855")
+    ("alarm_add" . "\xe856")
+    ("alarm_off" . "\xe857")
+    ("alarm_on" . "\xe858")
+    ("album" . "\xe019")
+    ("all_inclusive" . "\xeb3d")
+    ("all_out" . "\xe90b")
+    ("android" . "\xe859")
+    ("announcement" . "\xe85a")
+    ("apps" . "\xe5c3")
+    ("archive" . "\xe149")
+    ("arrow_back" . "\xe5c4")
+    ("arrow_downward" . "\xe5db")
+    ("arrow_drop_down" . "\xe5c5")
+    ("arrow_drop_down_circle" . "\xe5c6")
+    ("arrow_drop_up" . "\xe5c7")
+    ("arrow_forward" . "\xe5c8")
+    ("arrow_upward" . "\xe5d8")
+    ("art_track" . "\xe060")
+    ("aspect_ratio" . "\xe85b")
+    ("assessment" . "\xe85c")
+    ("assignment" . "\xe85d")
+    ("assignment_ind" . "\xe85e")
+    ("assignment_late" . "\xe85f")
+    ("assignment_return" . "\xe860")
+    ("assignment_returned" . "\xe861")
+    ("assignment_turned_in" . "\xe862")
+    ("assistant" . "\xe39f")
+    ("assistant_photo" . "\xe3a0")
+    ("attach_file" . "\xe226")
+    ("attach_money" . "\xe227")
+    ("attachment" . "\xe2bc")
+    ("audiotrack" . "\xe3a1")
+    ("autorenew" . "\xe863")
+    ("av_timer" . "\xe01b")
+    ("backspace" . "\xe14a")
+    ("backup" . "\xe864")
+    ("battery_alert" . "\xe19c")
+    ("battery_charging_full" . "\xe1a3")
+    ("battery_full" . "\xe1a4")
+    ("battery_std" . "\xe1a5")
+    ("battery_unknown" . "\xe1a6")
+    ("beach_access" . "\xeb3e")
+    ("beenhere" . "\xe52d")
+    ("block" . "\xe14b")
+    ("bluetooth" . "\xe1a7")
+    ("bluetooth_audio" . "\xe60f")
+    ("bluetooth_connected" . "\xe1a8")
+    ("bluetooth_disabled" . "\xe1a9")
+    ("bluetooth_searching" . "\xe1aa")
+    ("blur_circular" . "\xe3a2")
+    ("blur_linear" . "\xe3a3")
+    ("blur_off" . "\xe3a4")
+    ("blur_on" . "\xe3a5")
+    ("book" . "\xe865")
+    ("bookmark" . "\xe866")
+    ("bookmark_border" . "\xe867")
+    ("border_all" . "\xe228")
+    ("border_bottom" . "\xe229")
+    ("border_clear" . "\xe22a")
+    ("border_color" . "\xe22b")
+    ("border_horizontal" . "\xe22c")
+    ("border_inner" . "\xe22d")
+    ("border_left" . "\xe22e")
+    ("border_outer" . "\xe22f")
+    ("border_right" . "\xe230")
+    ("border_style" . "\xe231")
+    ("border_top" . "\xe232")
+    ("border_vertical" . "\xe233")
+    ("branding_watermark" . "\xe06b")
+    ("brightness_1" . "\xe3a6")
+    ("brightness_2" . "\xe3a7")
+    ("brightness_3" . "\xe3a8")
+    ("brightness_4" . "\xe3a9")
+    ("brightness_5" . "\xe3aa")
+    ("brightness_6" . "\xe3ab")
+    ("brightness_7" . "\xe3ac")
+    ("brightness_auto" . "\xe1ab")
+    ("brightness_high" . "\xe1ac")
+    ("brightness_low" . "\xe1ad")
+    ("brightness_medium" . "\xe1ae")
+    ("broken_image" . "\xe3ad")
+    ("brush" . "\xe3ae")
+    ("bubble_chart" . "\xe6dd")
+    ("bug_report" . "\xe868")
+    ("build" . "\xe869")
+    ("burst_mode" . "\xe43c")
+    ("business" . "\xe0af")
+    ("business_center" . "\xeb3f")
+    ("cached" . "\xe86a")
+    ("cake" . "\xe7e9")
+    ("call" . "\xe0b0")
+    ("call_end" . "\xe0b1")
+    ("call_made" . "\xe0b2")
+    ("call_merge" . "\xe0b3")
+    ("call_missed" . "\xe0b4")
+    ("call_missed_outgoing" . "\xe0e4")
+    ("call_received" . "\xe0b5")
+    ("call_split" . "\xe0b6")
+    ("call_to_action" . "\xe06c")
+    ("camera" . "\xe3af")
+    ("camera_alt" . "\xe3b0")
+    ("camera_enhance" . "\xe8fc")
+    ("camera_front" . "\xe3b1")
+    ("camera_rear" . "\xe3b2")
+    ("camera_roll" . "\xe3b3")
+    ("cancel" . "\xe5c9")
+    ("card_giftcard" . "\xe8f6")
+    ("card_membership" . "\xe8f7")
+    ("card_travel" . "\xe8f8")
+    ("casino" . "\xeb40")
+    ("cast" . "\xe307")
+    ("cast_connected" . "\xe308")
+    ("center_focus_strong" . "\xe3b4")
+    ("center_focus_weak" . "\xe3b5")
+    ("change_history" . "\xe86b")
+    ("chat" . "\xe0b7")
+    ("chat_bubble" . "\xe0ca")
+    ("chat_bubble_outline" . "\xe0cb")
+    ("check" . "\xe5ca")
+    ("check_box" . "\xe834")
+    ("check_box_outline_blank" . "\xe835")
+    ("check_circle" . "\xe86c")
+    ("chevron_left" . "\xe5cb")
+    ("chevron_right" . "\xe5cc")
+    ("child_care" . "\xeb41")
+    ("child_friendly" . "\xeb42")
+    ("chrome_reader_mode" . "\xe86d")
+    ("class" . "\xe86e")
+    ("clear" . "\xe14c")
+    ("clear_all" . "\xe0b8")
+    ("close" . "\xe5cd")
+    ("closed_caption" . "\xe01c")
+    ("cloud" . "\xe2bd")
+    ("cloud_circle" . "\xe2be")
+    ("cloud_done" . "\xe2bf")
+    ("cloud_download" . "\xe2c0")
+    ("cloud_off" . "\xe2c1")
+    ("cloud_queue" . "\xe2c2")
+    ("cloud_upload" . "\xe2c3")
+    ("code" . "\xe86f")
+    ("collections" . "\xe3b6")
+    ("collections_bookmark" . "\xe431")
+    ("color_lens" . "\xe3b7")
+    ("colorize" . "\xe3b8")
+    ("comment" . "\xe0b9")
+    ("compare" . "\xe3b9")
+    ("compare_arrows" . "\xe915")
+    ("computer" . "\xe30a")
+    ("confirmation_number" . "\xe638")
+    ("contact_mail" . "\xe0d0")
+    ("contact_phone" . "\xe0cf")
+    ("contacts" . "\xe0ba")
+    ("content_copy" . "\xe14d")
+    ("content_cut" . "\xe14e")
+    ("content_paste" . "\xe14f")
+    ("control_point" . "\xe3ba")
+    ("control_point_duplicate" . "\xe3bb")
+    ("copyright" . "\xe90c")
+    ("create" . "\xe150")
+    ("create_new_folder" . "\xe2cc")
+    ("credit_card" . "\xe870")
+    ("crop" . "\xe3be")
+    ("crop_16_9" . "\xe3bc")
+    ("crop_3_2" . "\xe3bd")
+    ("crop_5_4" . "\xe3bf")
+    ("crop_7_5" . "\xe3c0")
+    ("crop_din" . "\xe3c1")
+    ("crop_free" . "\xe3c2")
+    ("crop_landscape" . "\xe3c3")
+    ("crop_original" . "\xe3c4")
+    ("crop_portrait" . "\xe3c5")
+    ("crop_rotate" . "\xe437")
+    ("crop_square" . "\xe3c6")
+    ("dashboard" . "\xe871")
+    ("data_usage" . "\xe1af")
+    ("date_range" . "\xe916")
+    ("dehaze" . "\xe3c7")
+    ("delete" . "\xe872")
+    ("delete_forever" . "\xe92b")
+    ("delete_sweep" . "\xe16c")
+    ("description" . "\xe873")
+    ("desktop_mac" . "\xe30b")
+    ("desktop_windows" . "\xe30c")
+    ("details" . "\xe3c8")
+    ("developer_board" . "\xe30d")
+    ("developer_mode" . "\xe1b0")
+    ("device_hub" . "\xe335")
+    ("devices" . "\xe1b1")
+    ("devices_other" . "\xe337")
+    ("dialer_sip" . "\xe0bb")
+    ("dialpad" . "\xe0bc")
+    ("directions" . "\xe52e")
+    ("directions_bike" . "\xe52f")
+    ("directions_boat" . "\xe532")
+    ("directions_bus" . "\xe530")
+    ("directions_car" . "\xe531")
+    ("directions_railway" . "\xe534")
+    ("directions_run" . "\xe566")
+    ("directions_subway" . "\xe533")
+    ("directions_transit" . "\xe535")
+    ("directions_walk" . "\xe536")
+    ("disc_full" . "\xe610")
+    ("dns" . "\xe875")
+    ("do_not_disturb" . "\xe612")
+    ("do_not_disturb_alt" . "\xe611")
+    ("do_not_disturb_off" . "\xe643")
+    ("do_not_disturb_on" . "\xe644")
+    ("dock" . "\xe30e")
+    ("domain" . "\xe7ee")
+    ("done" . "\xe876")
+    ("done_all" . "\xe877")
+    ("donut_large" . "\xe917")
+    ("donut_small" . "\xe918")
+    ("drafts" . "\xe151")
+    ("drag_handle" . "\xe25d")
+    ("drive_eta" . "\xe613")
+    ("dvr" . "\xe1b2")
+    ("edit" . "\xe3c9")
+    ("edit_location" . "\xe568")
+    ("eject" . "\xe8fb")
+    ("email" . "\xe0be")
+    ("enhanced_encryption" . "\xe63f")
+    ("equalizer" . "\xe01d")
+    ("error" . "\xe000")
+    ("error_outline" . "\xe001")
+    ("euro_symbol" . "\xe926")
+    ("ev_station" . "\xe56d")
+    ("event" . "\xe878")
+    ("event_available" . "\xe614")
+    ("event_busy" . "\xe615")
+    ("event_note" . "\xe616")
+    ("event_seat" . "\xe903")
+    ("exit_to_app" . "\xe879")
+    ("expand_less" . "\xe5ce")
+    ("expand_more" . "\xe5cf")
+    ("explicit" . "\xe01e")
+    ("explore" . "\xe87a")
+    ("exposure" . "\xe3ca")
+    ("exposure_neg_1" . "\xe3cb")
+    ("exposure_neg_2" . "\xe3cc")
+    ("exposure_plus_1" . "\xe3cd")
+    ("exposure_plus_2" . "\xe3ce")
+    ("exposure_zero" . "\xe3cf")
+    ("extension" . "\xe87b")
+    ("face" . "\xe87c")
+    ("fast_forward" . "\xe01f")
+    ("fast_rewind" . "\xe020")
+    ("favorite" . "\xe87d")
+    ("favorite_border" . "\xe87e")
+    ("featured_play_list" . "\xe06d")
+    ("featured_video" . "\xe06e")
+    ("feedback" . "\xe87f")
+    ("fiber_dvr" . "\xe05d")
+    ("fiber_manual_record" . "\xe061")
+    ("fiber_new" . "\xe05e")
+    ("fiber_pin" . "\xe06a")
+    ("fiber_smart_record" . "\xe062")
+    ("file_download" . "\xe2c4")
+    ("file_upload" . "\xe2c6")
+    ("filter" . "\xe3d3")
+    ("filter_1" . "\xe3d0")
+    ("filter_2" . "\xe3d1")
+    ("filter_3" . "\xe3d2")
+    ("filter_4" . "\xe3d4")
+    ("filter_5" . "\xe3d5")
+    ("filter_6" . "\xe3d6")
+    ("filter_7" . "\xe3d7")
+    ("filter_8" . "\xe3d8")
+    ("filter_9" . "\xe3d9")
+    ("filter_9_plus" . "\xe3da")
+    ("filter_b_and_w" . "\xe3db")
+    ("filter_center_focus" . "\xe3dc")
+    ("filter_drama" . "\xe3dd")
+    ("filter_frames" . "\xe3de")
+    ("filter_hdr" . "\xe3df")
+    ("filter_list" . "\xe152")
+    ("filter_none" . "\xe3e0")
+    ("filter_tilt_shift" . "\xe3e2")
+    ("filter_vintage" . "\xe3e3")
+    ("find_in_page" . "\xe880")
+    ("find_replace" . "\xe881")
+    ("fingerprint" . "\xe90d")
+    ("first_page" . "\xe5dc")
+    ("fitness_center" . "\xeb43")
+    ("flag" . "\xe153")
+    ("flare" . "\xe3e4")
+    ("flash_auto" . "\xe3e5")
+    ("flash_off" . "\xe3e6")
+    ("flash_on" . "\xe3e7")
+    ("flight" . "\xe539")
+    ("flight_land" . "\xe904")
+    ("flight_takeoff" . "\xe905")
+    ("flip" . "\xe3e8")
+    ("flip_to_back" . "\xe882")
+    ("flip_to_front" . "\xe883")
+    ("folder" . "\xe2c7")
+    ("folder_open" . "\xe2c8")
+    ("folder_shared" . "\xe2c9")
+    ("folder_special" . "\xe617")
+    ("font_download" . "\xe167")
+    ("format_align_center" . "\xe234")
+    ("format_align_justify" . "\xe235")
+    ("format_align_left" . "\xe236")
+    ("format_align_right" . "\xe237")
+    ("format_bold" . "\xe238")
+    ("format_clear" . "\xe239")
+    ("format_color_fill" . "\xe23a")
+    ("format_color_reset" . "\xe23b")
+    ("format_color_text" . "\xe23c")
+    ("format_indent_decrease" . "\xe23d")
+    ("format_indent_increase" . "\xe23e")
+    ("format_italic" . "\xe23f")
+    ("format_line_spacing" . "\xe240")
+    ("format_list_bulleted" . "\xe241")
+    ("format_list_numbered" . "\xe242")
+    ("format_paint" . "\xe243")
+    ("format_quote" . "\xe244")
+    ("format_shapes" . "\xe25e")
+    ("format_size" . "\xe245")
+    ("format_strikethrough" . "\xe246")
+    ("format_textdirection_l_to_r" . "\xe247")
+    ("format_textdirection_r_to_l" . "\xe248")
+    ("format_underlined" . "\xe249")
+    ("forum" . "\xe0bf")
+    ("forward" . "\xe154")
+    ("forward_10" . "\xe056")
+    ("forward_30" . "\xe057")
+    ("forward_5" . "\xe058")
+    ("free_breakfast" . "\xeb44")
+    ("fullscreen" . "\xe5d0")
+    ("fullscreen_exit" . "\xe5d1")
+    ("functions" . "\xe24a")
+    ("g_translate" . "\xe927")
+    ("gamepad" . "\xe30f")
+    ("games" . "\xe021")
+    ("gavel" . "\xe90e")
+    ("gesture" . "\xe155")
+    ("get_app" . "\xe884")
+    ("gif" . "\xe908")
+    ("golf_course" . "\xeb45")
+    ("gps_fixed" . "\xe1b3")
+    ("gps_not_fixed" . "\xe1b4")
+    ("gps_off" . "\xe1b5")
+    ("grade" . "\xe885")
+    ("gradient" . "\xe3e9")
+    ("grain" . "\xe3ea")
+    ("graphic_eq" . "\xe1b8")
+    ("grid_off" . "\xe3eb")
+    ("grid_on" . "\xe3ec")
+    ("group" . "\xe7ef")
+    ("group_add" . "\xe7f0")
+    ("group_work" . "\xe886")
+    ("hd" . "\xe052")
+    ("hdr_off" . "\xe3ed")
+    ("hdr_on" . "\xe3ee")
+    ("hdr_strong" . "\xe3f1")
+    ("hdr_weak" . "\xe3f2")
+    ("headset" . "\xe310")
+    ("headset_mic" . "\xe311")
+    ("healing" . "\xe3f3")
+    ("hearing" . "\xe023")
+    ("help" . "\xe887")
+    ("help_outline" . "\xe8fd")
+    ("high_quality" . "\xe024")
+    ("highlight" . "\xe25f")
+    ("highlight_off" . "\xe888")
+    ("history" . "\xe889")
+    ("home" . "\xe88a")
+    ("hot_tub" . "\xeb46")
+    ("hotel" . "\xe53a")
+    ("hourglass_empty" . "\xe88b")
+    ("hourglass_full" . "\xe88c")
+    ("http" . "\xe902")
+    ("https" . "\xe88d")
+    ("image" . "\xe3f4")
+    ("image_aspect_ratio" . "\xe3f5")
+    ("import_contacts" . "\xe0e0")
+    ("import_export" . "\xe0c3")
+    ("important_devices" . "\xe912")
+    ("inbox" . "\xe156")
+    ("indeterminate_check_box" . "\xe909")
+    ("info" . "\xe88e")
+    ("info_outline" . "\xe88f")
+    ("input" . "\xe890")
+    ("insert_chart" . "\xe24b")
+    ("insert_comment" . "\xe24c")
+    ("insert_drive_file" . "\xe24d")
+    ("insert_emoticon" . "\xe24e")
+    ("insert_invitation" . "\xe24f")
+    ("insert_link" . "\xe250")
+    ("insert_photo" . "\xe251")
+    ("invert_colors" . "\xe891")
+    ("invert_colors_off" . "\xe0c4")
+    ("iso" . "\xe3f6")
+    ("keyboard" . "\xe312")
+    ("keyboard_arrow_down" . "\xe313")
+    ("keyboard_arrow_left" . "\xe314")
+    ("keyboard_arrow_right" . "\xe315")
+    ("keyboard_arrow_up" . "\xe316")
+    ("keyboard_backspace" . "\xe317")
+    ("keyboard_capslock" . "\xe318")
+    ("keyboard_hide" . "\xe31a")
+    ("keyboard_return" . "\xe31b")
+    ("keyboard_tab" . "\xe31c")
+    ("keyboard_voice" . "\xe31d")
+    ("kitchen" . "\xeb47")
+    ("label" . "\xe892")
+    ("label_outline" . "\xe893")
+    ("landscape" . "\xe3f7")
+    ("language" . "\xe894")
+    ("laptop" . "\xe31e")
+    ("laptop_chromebook" . "\xe31f")
+    ("laptop_mac" . "\xe320")
+    ("laptop_windows" . "\xe321")
+    ("last_page" . "\xe5dd")
+    ("launch" . "\xe895")
+    ("layers" . "\xe53b")
+    ("layers_clear" . "\xe53c")
+    ("leak_add" . "\xe3f8")
+    ("leak_remove" . "\xe3f9")
+    ("lens" . "\xe3fa")
+    ("library_add" . "\xe02e")
+    ("library_books" . "\xe02f")
+    ("library_music" . "\xe030")
+    ("lightbulb_outline" . "\xe90f")
+    ("line_style" . "\xe919")
+    ("line_weight" . "\xe91a")
+    ("linear_scale" . "\xe260")
+    ("link" . "\xe157")
+    ("linked_camera" . "\xe438")
+    ("list" . "\xe896")
+    ("live_help" . "\xe0c6")
+    ("live_tv" . "\xe639")
+    ("local_activity" . "\xe53f")
+    ("local_airport" . "\xe53d")
+    ("local_atm" . "\xe53e")
+    ("local_bar" . "\xe540")
+    ("local_cafe" . "\xe541")
+    ("local_car_wash" . "\xe542")
+    ("local_convenience_store" . "\xe543")
+    ("local_dining" . "\xe556")
+    ("local_drink" . "\xe544")
+    ("local_florist" . "\xe545")
+    ("local_gas_station" . "\xe546")
+    ("local_grocery_store" . "\xe547")
+    ("local_hospital" . "\xe548")
+    ("local_hotel" . "\xe549")
+    ("local_laundry_service" . "\xe54a")
+    ("local_library" . "\xe54b")
+    ("local_mall" . "\xe54c")
+    ("local_movies" . "\xe54d")
+    ("local_offer" . "\xe54e")
+    ("local_parking" . "\xe54f")
+    ("local_pharmacy" . "\xe550")
+    ("local_phone" . "\xe551")
+    ("local_pizza" . "\xe552")
+    ("local_play" . "\xe553")
+    ("local_post_office" . "\xe554")
+    ("local_printshop" . "\xe555")
+    ("local_see" . "\xe557")
+    ("local_shipping" . "\xe558")
+    ("local_taxi" . "\xe559")
+    ("location_city" . "\xe7f1")
+    ("location_disabled" . "\xe1b6")
+    ("location_off" . "\xe0c7")
+    ("location_on" . "\xe0c8")
+    ("location_searching" . "\xe1b7")
+    ("lock" . "\xe897")
+    ("lock_open" . "\xe898")
+    ("lock_outline" . "\xe899")
+    ("looks" . "\xe3fc")
+    ("looks_3" . "\xe3fb")
+    ("looks_4" . "\xe3fd")
+    ("looks_5" . "\xe3fe")
+    ("looks_6" . "\xe3ff")
+    ("looks_one" . "\xe400")
+    ("looks_two" . "\xe401")
+    ("loop" . "\xe028")
+    ("loupe" . "\xe402")
+    ("low_priority" . "\xe16d")
+    ("loyalty" . "\xe89a")
+    ("mail" . "\xe158")
+    ("mail_outline" . "\xe0e1")
+    ("map" . "\xe55b")
+    ("markunread" . "\xe159")
+    ("markunread_mailbox" . "\xe89b")
+    ("memory" . "\xe322")
+    ("menu" . "\xe5d2")
+    ("merge_type" . "\xe252")
+    ("message" . "\xe0c9")
+    ("mic" . "\xe029")
+    ("mic_none" . "\xe02a")
+    ("mic_off" . "\xe02b")
+    ("mms" . "\xe618")
+    ("mode_comment" . "\xe253")
+    ("mode_edit" . "\xe254")
+    ("monetization_on" . "\xe263")
+    ("money_off" . "\xe25c")
+    ("monochrome_photos" . "\xe403")
+    ("mood" . "\xe7f2")
+    ("mood_bad" . "\xe7f3")
+    ("more" . "\xe619")
+    ("more_horiz" . "\xe5d3")
+    ("more_vert" . "\xe5d4")
+    ("motorcycle" . "\xe91b")
+    ("mouse" . "\xe323")
+    ("move_to_inbox" . "\xe168")
+    ("movie" . "\xe02c")
+    ("movie_creation" . "\xe404")
+    ("movie_filter" . "\xe43a")
+    ("multiline_chart" . "\xe6df")
+    ("music_note" . "\xe405")
+    ("music_video" . "\xe063")
+    ("my_location" . "\xe55c")
+    ("nature" . "\xe406")
+    ("nature_people" . "\xe407")
+    ("navigate_before" . "\xe408")
+    ("navigate_next" . "\xe409")
+    ("navigation" . "\xe55d")
+    ("near_me" . "\xe569")
+    ("network_cell" . "\xe1b9")
+    ("network_check" . "\xe640")
+    ("network_locked" . "\xe61a")
+    ("network_wifi" . "\xe1ba")
+    ("new_releases" . "\xe031")
+    ("next_week" . "\xe16a")
+    ("nfc" . "\xe1bb")
+    ("no_encryption" . "\xe641")
+    ("no_sim" . "\xe0cc")
+    ("not_interested" . "\xe033")
+    ("note" . "\xe06f")
+    ("note_add" . "\xe89c")
+    ("notifications" . "\xe7f4")
+    ("notifications_active" . "\xe7f7")
+    ("notifications_none" . "\xe7f5")
+    ("notifications_off" . "\xe7f6")
+    ("notifications_paused" . "\xe7f8")
+    ("offline_pin" . "\xe90a")
+    ("ondemand_video" . "\xe63a")
+    ("opacity" . "\xe91c")
+    ("open_in_browser" . "\xe89d")
+    ("open_in_new" . "\xe89e")
+    ("open_with" . "\xe89f")
+    ("pages" . "\xe7f9")
+    ("pageview" . "\xe8a0")
+    ("palette" . "\xe40a")
+    ("pan_tool" . "\xe925")
+    ("panorama" . "\xe40b")
+    ("panorama_fish_eye" . "\xe40c")
+    ("panorama_horizontal" . "\xe40d")
+    ("panorama_vertical" . "\xe40e")
+    ("panorama_wide_angle" . "\xe40f")
+    ("party_mode" . "\xe7fa")
+    ("pause" . "\xe034")
+    ("pause_circle_filled" . "\xe035")
+    ("pause_circle_outline" . "\xe036")
+    ("payment" . "\xe8a1")
+    ("people" . "\xe7fb")
+    ("people_outline" . "\xe7fc")
+    ("perm_camera_mic" . "\xe8a2")
+    ("perm_contact_calendar" . "\xe8a3")
+    ("perm_data_setting" . "\xe8a4")
+    ("perm_device_information" . "\xe8a5")
+    ("perm_identity" . "\xe8a6")
+    ("perm_media" . "\xe8a7")
+    ("perm_phone_msg" . "\xe8a8")
+    ("perm_scan_wifi" . "\xe8a9")
+    ("person" . "\xe7fd")
+    ("person_add" . "\xe7fe")
+    ("person_outline" . "\xe7ff")
+    ("person_pin" . "\xe55a")
+    ("person_pin_circle" . "\xe56a")
+    ("personal_video" . "\xe63b")
+    ("pets" . "\xe91d")
+    ("phone" . "\xe0cd")
+    ("phone_android" . "\xe324")
+    ("phone_bluetooth_speaker" . "\xe61b")
+    ("phone_forwarded" . "\xe61c")
+    ("phone_in_talk" . "\xe61d")
+    ("phone_iphone" . "\xe325")
+    ("phone_locked" . "\xe61e")
+    ("phone_missed" . "\xe61f")
+    ("phone_paused" . "\xe620")
+    ("phonelink" . "\xe326")
+    ("phonelink_erase" . "\xe0db")
+    ("phonelink_lock" . "\xe0dc")
+    ("phonelink_off" . "\xe327")
+    ("phonelink_ring" . "\xe0dd")
+    ("phonelink_setup" . "\xe0de")
+    ("photo" . "\xe410")
+    ("photo_album" . "\xe411")
+    ("photo_camera" . "\xe412")
+    ("photo_filter" . "\xe43b")
+    ("photo_library" . "\xe413")
+    ("photo_size_select_actual" . "\xe432")
+    ("photo_size_select_large" . "\xe433")
+    ("photo_size_select_small" . "\xe434")
+    ("picture_as_pdf" . "\xe415")
+    ("picture_in_picture" . "\xe8aa")
+    ("picture_in_picture_alt" . "\xe911")
+    ("pie_chart" . "\xe6c4")
+    ("pie_chart_outlined" . "\xe6c5")
+    ("pin_drop" . "\xe55e")
+    ("place" . "\xe55f")
+    ("play_arrow" . "\xe037")
+    ("play_circle_filled" . "\xe038")
+    ("play_circle_outline" . "\xe039")
+    ("play_for_work" . "\xe906")
+    ("playlist_add" . "\xe03b")
+    ("playlist_add_check" . "\xe065")
+    ("playlist_play" . "\xe05f")
+    ("plus_one" . "\xe800")
+    ("poll" . "\xe801")
+    ("polymer" . "\xe8ab")
+    ("pool" . "\xeb48")
+    ("portable_wifi_off" . "\xe0ce")
+    ("portrait" . "\xe416")
+    ("power" . "\xe63c")
+    ("power_input" . "\xe336")
+    ("power_settings_new" . "\xe8ac")
+    ("pregnant_woman" . "\xe91e")
+    ("present_to_all" . "\xe0df")
+    ("print" . "\xe8ad")
+    ("priority_high" . "\xe645")
+    ("public" . "\xe80b")
+    ("publish" . "\xe255")
+    ("query_builder" . "\xe8ae")
+    ("question_answer" . "\xe8af")
+    ("queue" . "\xe03c")
+    ("queue_music" . "\xe03d")
+    ("queue_play_next" . "\xe066")
+    ("radio" . "\xe03e")
+    ("radio_button_checked" . "\xe837")
+    ("radio_button_unchecked" . "\xe836")
+    ("rate_review" . "\xe560")
+    ("receipt" . "\xe8b0")
+    ("recent_actors" . "\xe03f")
+    ("record_voice_over" . "\xe91f")
+    ("redeem" . "\xe8b1")
+    ("redo" . "\xe15a")
+    ("refresh" . "\xe5d5")
+    ("remove" . "\xe15b")
+    ("remove_circle" . "\xe15c")
+    ("remove_circle_outline" . "\xe15d")
+    ("remove_from_queue" . "\xe067")
+    ("remove_red_eye" . "\xe417")
+    ("remove_shopping_cart" . "\xe928")
+    ("reorder" . "\xe8fe")
+    ("repeat" . "\xe040")
+    ("repeat_one" . "\xe041")
+    ("replay" . "\xe042")
+    ("replay_10" . "\xe059")
+    ("replay_30" . "\xe05a")
+    ("replay_5" . "\xe05b")
+    ("reply" . "\xe15e")
+    ("reply_all" . "\xe15f")
+    ("report" . "\xe160")
+    ("report_problem" . "\xe8b2")
+    ("restaurant" . "\xe56c")
+    ("restaurant_menu" . "\xe561")
+    ("restore" . "\xe8b3")
+    ("restore_page" . "\xe929")
+    ("ring_volume" . "\xe0d1")
+    ("room" . "\xe8b4")
+    ("room_service" . "\xeb49")
+    ("rotate_90_degrees_ccw" . "\xe418")
+    ("rotate_left" . "\xe419")
+    ("rotate_right" . "\xe41a")
+    ("rounded_corner" . "\xe920")
+    ("router" . "\xe328")
+    ("rowing" . "\xe921")
+    ("rss_feed" . "\xe0e5")
+    ("rv_hookup" . "\xe642")
+    ("satellite" . "\xe562")
+    ("save" . "\xe161")
+    ("scanner" . "\xe329")
+    ("schedule" . "\xe8b5")
+    ("school" . "\xe80c")
+    ("screen_lock_landscape" . "\xe1be")
+    ("screen_lock_portrait" . "\xe1bf")
+    ("screen_lock_rotation" . "\xe1c0")
+    ("screen_rotation" . "\xe1c1")
+    ("screen_share" . "\xe0e2")
+    ("sd_card" . "\xe623")
+    ("sd_storage" . "\xe1c2")
+    ("search" . "\xe8b6")
+    ("security" . "\xe32a")
+    ("select_all" . "\xe162")
+    ("send" . "\xe163")
+    ("sentiment_dissatisfied" . "\xe811")
+    ("sentiment_neutral" . "\xe812")
+    ("sentiment_satisfied" . "\xe813")
+    ("sentiment_very_dissatisfied" . "\xe814")
+    ("sentiment_very_satisfied" . "\xe815")
+    ("settings" . "\xe8b8")
+    ("settings_applications" . "\xe8b9")
+    ("settings_backup_restore" . "\xe8ba")
+    ("settings_bluetooth" . "\xe8bb")
+    ("settings_brightness" . "\xe8bd")
+    ("settings_cell" . "\xe8bc")
+    ("settings_ethernet" . "\xe8be")
+    ("settings_input_antenna" . "\xe8bf")
+    ("settings_input_component" . "\xe8c0")
+    ("settings_input_composite" . "\xe8c1")
+    ("settings_input_hdmi" . "\xe8c2")
+    ("settings_input_svideo" . "\xe8c3")
+    ("settings_overscan" . "\xe8c4")
+    ("settings_phone" . "\xe8c5")
+    ("settings_power" . "\xe8c6")
+    ("settings_remote" . "\xe8c7")
+    ("settings_system_daydream" . "\xe1c3")
+    ("settings_voice" . "\xe8c8")
+    ("share" . "\xe80d")
+    ("shop" . "\xe8c9")
+    ("shop_two" . "\xe8ca")
+    ("shopping_basket" . "\xe8cb")
+    ("shopping_cart" . "\xe8cc")
+    ("short_text" . "\xe261")
+    ("show_chart" . "\xe6e1")
+    ("shuffle" . "\xe043")
+    ("signal_cellular_4_bar" . "\xe1c8")
+    ("signal_cellular_connected_no_internet_4_bar" . "\xe1cd")
+    ("signal_cellular_no_sim" . "\xe1ce")
+    ("signal_cellular_null" . "\xe1cf")
+    ("signal_cellular_off" . "\xe1d0")
+    ("signal_wifi_4_bar" . "\xe1d8")
+    ("signal_wifi_4_bar_lock" . "\xe1d9")
+    ("signal_wifi_off" . "\xe1da")
+    ("sim_card" . "\xe32b")
+    ("sim_card_alert" . "\xe624")
+    ("skip_next" . "\xe044")
+    ("skip_previous" . "\xe045")
+    ("slideshow" . "\xe41b")
+    ("slow_motion_video" . "\xe068")
+    ("smartphone" . "\xe32c")
+    ("smoke_free" . "\xeb4a")
+    ("smoking_rooms" . "\xeb4b")
+    ("sms" . "\xe625")
+    ("sms_failed" . "\xe626")
+    ("snooze" . "\xe046")
+    ("sort" . "\xe164")
+    ("sort_by_alpha" . "\xe053")
+    ("spa" . "\xeb4c")
+    ("space_bar" . "\xe256")
+    ("speaker" . "\xe32d")
+    ("speaker_group" . "\xe32e")
+    ("speaker_notes" . "\xe8cd")
+    ("speaker_notes_off" . "\xe92a")
+    ("speaker_phone" . "\xe0d2")
+    ("spellcheck" . "\xe8ce")
+    ("star" . "\xe838")
+    ("star_border" . "\xe83a")
+    ("star_half" . "\xe839")
+    ("stars" . "\xe8d0")
+    ("stay_current_landscape" . "\xe0d3")
+    ("stay_current_portrait" . "\xe0d4")
+    ("stay_primary_landscape" . "\xe0d5")
+    ("stay_primary_portrait" . "\xe0d6")
+    ("stop" . "\xe047")
+    ("stop_screen_share" . "\xe0e3")
+    ("storage" . "\xe1db")
+    ("store" . "\xe8d1")
+    ("store_mall_directory" . "\xe563")
+    ("straighten" . "\xe41c")
+    ("streetview" . "\xe56e")
+    ("strikethrough_s" . "\xe257")
+    ("style" . "\xe41d")
+    ("subdirectory_arrow_left" . "\xe5d9")
+    ("subdirectory_arrow_right" . "\xe5da")
+    ("subject" . "\xe8d2")
+    ("subscriptions" . "\xe064")
+    ("subtitles" . "\xe048")
+    ("subway" . "\xe56f")
+    ("supervisor_account" . "\xe8d3")
+    ("surround_sound" . "\xe049")
+    ("swap_calls" . "\xe0d7")
+    ("swap_horiz" . "\xe8d4")
+    ("swap_vert" . "\xe8d5")
+    ("swap_vertical_circle" . "\xe8d6")
+    ("switch_camera" . "\xe41e")
+    ("switch_video" . "\xe41f")
+    ("sync" . "\xe627")
+    ("sync_disabled" . "\xe628")
+    ("sync_problem" . "\xe629")
+    ("system_update" . "\xe62a")
+    ("system_update_alt" . "\xe8d7")
+    ("tab" . "\xe8d8")
+    ("tab_unselected" . "\xe8d9")
+    ("tablet" . "\xe32f")
+    ("tablet_android" . "\xe330")
+    ("tablet_mac" . "\xe331")
+    ("tag_faces" . "\xe420")
+    ("tap_and_play" . "\xe62b")
+    ("terrain" . "\xe564")
+    ("text_fields" . "\xe262")
+    ("text_format" . "\xe165")
+    ("textsms" . "\xe0d8")
+    ("texture" . "\xe421")
+    ("theaters" . "\xe8da")
+    ("thumb_down" . "\xe8db")
+    ("thumb_up" . "\xe8dc")
+    ("thumbs_up_down" . "\xe8dd")
+    ("time_to_leave" . "\xe62c")
+    ("timelapse" . "\xe422")
+    ("timeline" . "\xe922")
+    ("timer" . "\xe425")
+    ("timer_10" . "\xe423")
+    ("timer_3" . "\xe424")
+    ("timer_off" . "\xe426")
+    ("title" . "\xe264")
+    ("toc" . "\xe8de")
+    ("today" . "\xe8df")
+    ("toll" . "\xe8e0")
+    ("tonality" . "\xe427")
+    ("touch_app" . "\xe913")
+    ("toys" . "\xe332")
+    ("track_changes" . "\xe8e1")
+    ("traffic" . "\xe565")
+    ("train" . "\xe570")
+    ("tram" . "\xe571")
+    ("transfer_within_a_station" . "\xe572")
+    ("transform" . "\xe428")
+    ("translate" . "\xe8e2")
+    ("trending_down" . "\xe8e3")
+    ("trending_flat" . "\xe8e4")
+    ("trending_up" . "\xe8e5")
+    ("tune" . "\xe429")
+    ("turned_in" . "\xe8e6")
+    ("turned_in_not" . "\xe8e7")
+    ("tv" . "\xe333")
+    ("unarchive" . "\xe169")
+    ("undo" . "\xe166")
+    ("unfold_less" . "\xe5d6")
+    ("unfold_more" . "\xe5d7")
+    ("update" . "\xe923")
+    ("usb" . "\xe1e0")
+    ("verified_user" . "\xe8e8")
+    ("vertical_align_bottom" . "\xe258")
+    ("vertical_align_center" . "\xe259")
+    ("vertical_align_top" . "\xe25a")
+    ("vibration" . "\xe62d")
+    ("video_call" . "\xe070")
+    ("video_label" . "\xe071")
+    ("video_library" . "\xe04a")
+    ("videocam" . "\xe04b")
+    ("videocam_off" . "\xe04c")
+    ("videogame_asset" . "\xe338")
+    ("view_agenda" . "\xe8e9")
+    ("view_array" . "\xe8ea")
+    ("view_carousel" . "\xe8eb")
+    ("view_column" . "\xe8ec")
+    ("view_comfy" . "\xe42a")
+    ("view_compact" . "\xe42b")
+    ("view_day" . "\xe8ed")
+    ("view_headline" . "\xe8ee")
+    ("view_list" . "\xe8ef")
+    ("view_module" . "\xe8f0")
+    ("view_quilt" . "\xe8f1")
+    ("view_stream" . "\xe8f2")
+    ("view_week" . "\xe8f3")
+    ("vignette" . "\xe435")
+    ("visibility" . "\xe8f4")
+    ("visibility_off" . "\xe8f5")
+    ("voice_chat" . "\xe62e")
+    ("voicemail" . "\xe0d9")
+    ("volume_down" . "\xe04d")
+    ("volume_mute" . "\xe04e")
+    ("volume_off" . "\xe04f")
+    ("volume_up" . "\xe050")
+    ("vpn_key" . "\xe0da")
+    ("vpn_lock" . "\xe62f")
+    ("wallpaper" . "\xe1bc")
+    ("warning" . "\xe002")
+    ("watch" . "\xe334")
+    ("watch_later" . "\xe924")
+    ("wb_auto" . "\xe42c")
+    ("wb_cloudy" . "\xe42d")
+    ("wb_incandescent" . "\xe42e")
+    ("wb_iridescent" . "\xe436")
+    ("wb_sunny" . "\xe430")
+    ("wc" . "\xe63d")
+    ("web" . "\xe051")
+    ("web_asset" . "\xe069")
+    ("weekend" . "\xe16b")
+    ("whatshot" . "\xe80e")
+    ("widgets" . "\xe1bd")
+    ("wifi" . "\xe63e")
+    ("wifi_lock" . "\xe1e1")
+    ("wifi_tethering" . "\xe1e2")
+    ("work" . "\xe8f9")
+    ("wrap_text" . "\xe25b")
+    ("youtube_searched_for" . "\xe8fa")
+    ("zoom_in" . "\xe8ff")
+    ("zoom_out" . "\xe900")
+    ("zoom_out_map" . "\xe56b")))
+
+  (provide 'data-material)
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-octicons.el b/.emacs.d.back/packages/all-the-icons/data/data-octicons.el
new file mode 100644
index 00000000..432251ed
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-octicons.el
@@ -0,0 +1,165 @@
+(defvar all-the-icons-data/octicons-alist
+  '(
+
+    ("alert" . "\xf02d")
+    ("arrow-down" . "\xf03f")
+    ("arrow-left" . "\xf040")
+    ("arrow-right" . "\xf03e")
+    ("arrow-small-down" . "\xf0a0")
+    ("arrow-small-left" . "\xf0a1")
+    ("arrow-small-right" . "\xf071")
+    ("arrow-small-up" . "\xf09f")
+    ("arrow-up" . "\xf03d")
+    ("book" . "\xf007")
+    ("bookmark" . "\xf07b")
+    ("briefcase" . "\xf0d3")
+    ("broadcast" . "\xf048")
+    ("browser" . "\xf0c5")
+    ("bug" . "\xf091")
+    ("calendar" . "\xf068")
+    ("check" . "\xf03a")
+    ("checklist" . "\xf076")
+    ("chevron-down" . "\xf0a3")
+    ("chevron-left" . "\xf0a4")
+    ("chevron-right" . "\xf078")
+    ("chevron-up" . "\xf0a2")
+    ("circle-slash" . "\xf084")
+    ("circuit-board" . "\xf0d6")
+    ("clippy" . "\xf035")
+    ("clock" . "\xf046")
+    ("cloud-download" . "\xf00b")
+    ("cloud-upload" . "\xf00c")
+    ("code" . "\xf05f")
+    ("comment" . "\xf02b")
+    ("comment-discussion" . "\xf04f")
+    ("credit-card" . "\xf045")
+    ("dash" . "\xf0ca")
+    ("dashboard" . "\xf07d")
+    ("database" . "\xf096")
+    ("device-camera" . "\xf056")
+    ("device-camera-video" . "\xf057")
+    ("device-desktop" . "\xf27c")
+    ("device-mobile" . "\xf038")
+    ("diff" . "\xf04d")
+    ("diff-added" . "\xf06b")
+    ("diff-ignored" . "\xf099")
+    ("diff-modified" . "\xf06d")
+    ("diff-removed" . "\xf06c")
+    ("diff-renamed" . "\xf06e")
+    ("ellipsis" . "\xf09a")
+    ("eye" . "\xf04e")
+    ("file-binary" . "\xf094")
+    ("file-code" . "\xf010")
+    ("file-directory" . "\xf016")
+    ("file-media" . "\xf012")
+    ("file-pdf" . "\xf014")
+    ("file-submodule" . "\xf017")
+    ("file-symlink-directory" . "\xf0b1")
+    ("file-symlink-file" . "\xf0b0")
+    ("file-text" . "\xf011")
+    ("file-zip" . "\xf013")
+    ("flame" . "\xf0d2")
+    ("fold" . "\xf0cc")
+    ("gear" . "\xf02f")
+    ("gift" . "\xf042")
+    ("gist" . "\xf00e")
+    ("gist-secret" . "\xf08c")
+    ("git-branch" . "\xf020")
+    ("git-commit" . "\xf01f")
+    ("git-compare" . "\xf0ac")
+    ("git-merge" . "\xf023")
+    ("git-pull-request" . "\xf009")
+    ("globe" . "\xf0b6")
+    ("graph" . "\xf043")
+    ("beaker" . "\xf0dd")
+    ("heart" . "\x2665")
+    ("history" . "\xf07e")
+    ("home" . "\xf08d")
+    ("horizontal-rule" . "\xf070")
+    ("hourglass" . "\xf09e")
+    ("hubot" . "\xf09d")
+    ("inbox" . "\xf0cf")
+    ("info" . "\xf059")
+    ("issue-closed" . "\xf028")
+    ("issue-opened" . "\xf026")
+    ("issue-reopened" . "\xf027")
+    ("jersey" . "\xf019")
+    ("key" . "\xf049")
+    ("keyboard" . "\xf00d")
+    ("law" . "\xf0d8")
+    ("light-bulb" . "\xf000")
+    ("link" . "\xf05c")
+    ("link-external" . "\xf07f")
+    ("list-ordered" . "\xf062")
+    ("list-unordered" . "\xf061")
+    ("location" . "\xf060")
+    ("lock" . "\xf06a")
+    ("logo-github" . "\xf092")
+    ("mail" . "\xf03b")
+    ("mail-read" . "\xf03c")
+    ("mail-reply" . "\xf051")
+    ("mark-github" . "\xf00a")
+    ("markdown" . "\xf0c9")
+    ("megaphone" . "\xf077")
+    ("mention" . "\xf0be")
+    ("milestone" . "\xf075")
+    ("mirror" . "\xf024")
+    ("mortar-board" . "\xf0d7")
+    ("mute" . "\xf080")
+    ("no-newline" . "\xf09c")
+    ("octoface" . "\xf008")
+    ("organization" . "\xf037")
+    ("package" . "\xf0c4")
+    ("paintcan" . "\xf0d1")
+    ("pencil" . "\xf058")
+    ("person" . "\xf018")
+    ("pin" . "\xf041")
+    ("plug" . "\xf0d4")
+    ("plus" . "\xf05d")
+    ("primitive-dot" . "\xf052")
+    ("primitive-square" . "\xf053")
+    ("pulse" . "\xf085")
+    ("puzzle" . "\xf0c0")
+    ("question" . "\xf02c")
+    ("quote" . "\xf063")
+    ("radio-tower" . "\xf030")
+    ("repo" . "\xf001")
+    ("repo-clone" . "\xf04c")
+    ("repo-force-push" . "\xf04a")
+    ("repo-forked" . "\xf002")
+    ("repo-pull" . "\xf006")
+    ("repo-push" . "\xf005")
+    ("rocket" . "\xf033")
+    ("rss" . "\xf034")
+    ("ruby" . "\xf047")
+    ("search" . "\xf02e")
+    ("server" . "\xf097")
+    ("settings" . "\xf07c")
+    ("sign-in" . "\xf036")
+    ("sign-out" . "\xf032")
+    ("squirrel" . "\xf0b2")
+    ("star" . "\xf02a")
+    ("steps" . "\xf0c7")
+    ("stop" . "\xf08f")
+    ("sync" . "\xf087")
+    ("tag" . "\xf015")
+    ("telescope" . "\xf088")
+    ("terminal" . "\xf0c8")
+    ("three-bars" . "\xf05e")
+    ("thumbsdown" . "\xf0db")
+    ("thumbsup" . "\xf0da")
+    ("tools" . "\xf031")
+    ("trashcan" . "\xf0d0")
+    ("triangle-down" . "\xf05b")
+    ("triangle-left" . "\xf044")
+    ("triangle-right" . "\xf05a")
+    ("triangle-up" . "\xf0aa")
+    ("unfold" . "\xf039")
+    ("unmute" . "\xf0ba")
+    ("versions" . "\xf064")
+    ("x" . "\xf081")
+    ("zap" . "\x26A1")
+
+    ))
+
+(provide 'data-octicons)
diff --git a/.emacs.d.back/packages/all-the-icons/data/data-weathericons.el b/.emacs.d.back/packages/all-the-icons/data/data-weathericons.el
new file mode 100644
index 00000000..676581c3
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/data/data-weathericons.el
@@ -0,0 +1,594 @@
+(defvar all-the-icons-data/weather-icons-alist
+  '(
+
+    ("alien"                           . "\xf075")
+    ("barometer"                       . "\xf079")
+    ("celsius"                         . "\xf03c")
+    ("cloud"                           . "\xf041")
+    ("cloud-down"                      . "\xf03d")
+    ("cloud-refresh"                   . "\xf03e")
+    ("cloud-up"                        . "\xf040")
+    ("cloudy"                          . "\xf013")
+    ("cloudy-gusts"                    . "\xf011")
+    ("cloudy-windy"                    . "\xf012")
+    ("day-cloudy"                      . "\xf002")
+    ("day-cloudy-gusts"                . "\xf000")
+    ("day-cloudy-high"                 . "\xf07d")
+    ("day-cloudy-windy"                . "\xf001")
+    ("day-fog"                         . "\xf003")
+    ("day-hail"                        . "\xf004")
+    ("day-haze"                        . "\xf0b6")
+    ("day-light-wind"                  . "\xf0c4")
+    ("day-lightning"                   . "\xf005")
+    ("day-rain"                        . "\xf008")
+    ("day-rain-mix"                    . "\xf006")
+    ("day-rain-wind"                   . "\xf007")
+    ("day-showers"                     . "\xf009")
+    ("day-sleet"                       . "\xf0b2")
+    ("day-sleet-storm"                 . "\xf068")
+    ("day-snow"                        . "\xf00a")
+    ("day-snow-thunderstorm"           . "\xf06b")
+    ("day-snow-wind"                   . "\xf065")
+    ("day-sprinkle"                    . "\xf00b")
+    ("day-storm-showers"               . "\xf00e")
+    ("day-sunny"                       . "\xf00d")
+    ("day-sunny-overcast"              . "\xf00c")
+    ("day-thunderstorm"                . "\xf010")
+    ("day-windy"                       . "\xf085")
+    ("degrees"                         . "\xf042")
+    ("direction-down"                  . "\xf044")
+    ("direction-down-left"             . "\xf043")
+    ("direction-down-right"            . "\xf088")
+    ("direction-left"                  . "\xf048")
+    ("direction-right"                 . "\xf04d")
+    ("direction-up"                    . "\xf058")
+    ("direction-up-left"               . "\xf087")
+    ("direction-up-right"              . "\xf057")
+    ("dust"                            . "\xf063")
+    ("earthquake"                      . "\xf0c6")
+    ("fahrenheit"                      . "\xf045")
+    ("fire"                            . "\xf0c7")
+    ("flood"                           . "\xf07c")
+    ("fog"                             . "\xf014")
+    ("forecast-io-clear-day"           . "\xf00d")
+    ("forecast-io-clear-night"         . "\xf02e")
+    ("forecast-io-cloudy"              . "\xf013")
+    ("forecast-io-fog"                 . "\xf014")
+    ("forecast-io-hail"                . "\xf015")
+    ("forecast-io-partly-cloudy-day"   . "\xf002")
+    ("forecast-io-partly-cloudy-night" . "\xf031")
+    ("forecast-io-rain"                . "\xf019")
+    ("forecast-io-sleet"               . "\xf0b5")
+    ("forecast-io-snow"                . "\xf01b")
+    ("forecast-io-thunderstorm"        . "\xf01e")
+    ("forecast-io-tornado"             . "\xf056")
+    ("forecast-io-wind"                . "\xf050")
+    ("gale-warning"                    . "\xf0cd")
+    ("hail"                            . "\xf015")
+    ("horizon"                         . "\xf047")
+    ("horizon-alt"                     . "\xf046")
+    ("hot"                             . "\xf072")
+    ("humidity"                        . "\xf07a")
+    ("hurricane"                       . "\xf073")
+    ("hurricane-warning"               . "\xf0cf")
+    ("lightning"                       . "\xf016")
+    ("lunar-eclipse"                   . "\xf070")
+    ("meteor"                          . "\xf071")
+    ("moon-0"                          . "\xf095")
+    ("moon-1"                          . "\xf096")
+    ("moon-10"                         . "\xf09f")
+    ("moon-11"                         . "\xf0a0")
+    ("moon-12"                         . "\xf0a1")
+    ("moon-13"                         . "\xf0a2")
+    ("moon-14"                         . "\xf0a3")
+    ("moon-15"                         . "\xf0a4")
+    ("moon-16"                         . "\xf0a5")
+    ("moon-17"                         . "\xf0a6")
+    ("moon-18"                         . "\xf0a7")
+    ("moon-19"                         . "\xf0a8")
+    ("moon-2"                          . "\xf097")
+    ("moon-20"                         . "\xf0a9")
+    ("moon-21"                         . "\xf0aa")
+    ("moon-22"                         . "\xf0ab")
+    ("moon-23"                         . "\xf0ac")
+    ("moon-24"                         . "\xf0ad")
+    ("moon-25"                         . "\xf0ae")
+    ("moon-26"                         . "\xf0af")
+    ("moon-27"                         . "\xf0b0")
+    ("moon-3"                          . "\xf098")
+    ("moon-4"                          . "\xf099")
+    ("moon-5"                          . "\xf09a")
+    ("moon-6"                          . "\xf09b")
+    ("moon-7"                          . "\xf09c")
+    ("moon-8"                          . "\xf09d")
+    ("moon-9"                          . "\xf09e")
+    ("moon-alt-first-quarter"          . "\xf0d6")
+    ("moon-alt-full"                   . "\xf0dd")
+    ("moon-alt-new"                    . "\xf0eb")
+    ("moon-alt-third-quarter"          . "\xf0e4")
+    ("moon-alt-waning-crescent-1"      . "\xf0e5")
+    ("moon-alt-waning-crescent-2"      . "\xf0e6")
+    ("moon-alt-waning-crescent-3"      . "\xf0e7")
+    ("moon-alt-waning-crescent-4"      . "\xf0e8")
+    ("moon-alt-waning-crescent-5"      . "\xf0e9")
+    ("moon-alt-waning-crescent-6"      . "\xf0ea")
+    ("moon-alt-waning-gibbous-1"       . "\xf0de")
+    ("moon-alt-waning-gibbous-2"       . "\xf0df")
+    ("moon-alt-waning-gibbous-3"       . "\xf0e0")
+    ("moon-alt-waning-gibbous-4"       . "\xf0e1")
+    ("moon-alt-waning-gibbous-5"       . "\xf0e2")
+    ("moon-alt-waning-gibbous-6"       . "\xf0e3")
+    ("moon-alt-waxing-crescent-1"      . "\xf0d0")
+    ("moon-alt-waxing-crescent-2"      . "\xf0d1")
+    ("moon-alt-waxing-crescent-3"      . "\xf0d2")
+    ("moon-alt-waxing-crescent-4"      . "\xf0d3")
+    ("moon-alt-waxing-crescent-5"      . "\xf0d4")
+    ("moon-alt-waxing-crescent-6"      . "\xf0d5")
+    ("moon-alt-waxing-gibbous-1"       . "\xf0d7")
+    ("moon-alt-waxing-gibbous-2"       . "\xf0d8")
+    ("moon-alt-waxing-gibbous-3"       . "\xf0d9")
+    ("moon-alt-waxing-gibbous-4"       . "\xf0da")
+    ("moon-alt-waxing-gibbous-5"       . "\xf0db")
+    ("moon-alt-waxing-gibbous-6"       . "\xf0dc")
+    ("moon-first-quarter"              . "\xf09c")
+    ("moon-full"                       . "\xf0a3")
+    ("moon-new"                        . "\xf095")
+    ("moon-third-quarter"              . "\xf0aa")
+    ("moon-waning-crescent-1"          . "\xf0ab")
+    ("moon-waning-crescent-2"          . "\xf0ac")
+    ("moon-waning-crescent-3"          . "\xf0ad")
+    ("moon-waning-crescent-4"          . "\xf0ae")
+    ("moon-waning-crescent-5"          . "\xf0af")
+    ("moon-waning-crescent-6"          . "\xf0b0")
+    ("moon-waning-gibbous-1"           . "\xf0a4")
+    ("moon-waning-gibbous-2"           . "\xf0a5")
+    ("moon-waning-gibbous-3"           . "\xf0a6")
+    ("moon-waning-gibbous-4"           . "\xf0a7")
+    ("moon-waning-gibbous-5"           . "\xf0a8")
+    ("moon-waning-gibbous-6"           . "\xf0a9")
+    ("moon-waxing-crescent-1"          . "\xf096")
+    ("moon-waxing-crescent-2"          . "\xf097")
+    ("moon-waxing-crescent-3"          . "\xf098")
+    ("moon-waxing-crescent-4"          . "\xf099")
+    ("moon-waxing-crescent-5"          . "\xf09a")
+    ("moon-waxing-crescent-6"          . "\xf09b")
+    ("moon-waxing-gibbous-1"           . "\xf09d")
+    ("moon-waxing-gibbous-2"           . "\xf09e")
+    ("moon-waxing-gibbous-3"           . "\xf09f")
+    ("moon-waxing-gibbous-4"           . "\xf0a0")
+    ("moon-waxing-gibbous-5"           . "\xf0a1")
+    ("moon-waxing-gibbous-6"           . "\xf0a2")
+    ("moonrise"                        . "\xf0c9")
+    ("moonset"                         . "\xf0ca")
+    ("na"                              . "\xf07b")
+    ("night-alt-cloudy"                . "\xf086")
+    ("night-alt-cloudy-gusts"          . "\xf022")
+    ("night-alt-cloudy-high"           . "\xf07e")
+    ("night-alt-cloudy-windy"          . "\xf023")
+    ("night-alt-hail"                  . "\xf024")
+    ("night-alt-lightning"             . "\xf025")
+    ("night-alt-partly-cloudy"         . "\xf081")
+    ("night-alt-rain"                  . "\xf028")
+    ("night-alt-rain-mix"              . "\xf026")
+    ("night-alt-rain-wind"             . "\xf027")
+    ("night-alt-showers"               . "\xf029")
+    ("night-alt-sleet"                 . "\xf0b4")
+    ("night-alt-sleet-storm"           . "\xf06a")
+    ("night-alt-snow"                  . "\xf02a")
+    ("night-alt-snow-thunderstorm"     . "\xf06d")
+    ("night-alt-snow-wind"             . "\xf067")
+    ("night-alt-sprinkle"              . "\xf02b")
+    ("night-alt-storm-showers"         . "\xf02c")
+    ("night-alt-thunderstorm"          . "\xf02d")
+    ("night-clear"                     . "\xf02e")
+    ("night-cloudy"                    . "\xf031")
+    ("night-cloudy-gusts"              . "\xf02f")
+    ("night-cloudy-high"               . "\xf080")
+    ("night-cloudy-windy"              . "\xf030")
+    ("night-fog"                       . "\xf04a")
+    ("night-hail"                      . "\xf032")
+    ("night-lightning"                 . "\xf033")
+    ("night-partly-cloudy"             . "\xf083")
+    ("night-rain"                      . "\xf036")
+    ("night-rain-mix"                  . "\xf034")
+    ("night-rain-wind"                 . "\xf035")
+    ("night-showers"                   . "\xf037")
+    ("night-sleet"                     . "\xf0b3")
+    ("night-sleet-storm"               . "\xf069")
+    ("night-snow"                      . "\xf038")
+    ("night-snow-thunderstorm"         . "\xf06c")
+    ("night-snow-wind"                 . "\xf066")
+    ("night-sprinkle"                  . "\xf039")
+    ("night-storm-showers"             . "\xf03a")
+    ("night-thunderstorm"              . "\xf03b")
+    ("owm-200"                         . "\xf01e")
+    ("owm-201"                         . "\xf01e")
+    ("owm-202"                         . "\xf01e")
+    ("owm-210"                         . "\xf016")
+    ("owm-211"                         . "\xf016")
+    ("owm-212"                         . "\xf016")
+    ("owm-221"                         . "\xf016")
+    ("owm-230"                         . "\xf01e")
+    ("owm-231"                         . "\xf01e")
+    ("owm-232"                         . "\xf01e")
+    ("owm-300"                         . "\xf01c")
+    ("owm-301"                         . "\xf01c")
+    ("owm-302"                         . "\xf019")
+    ("owm-310"                         . "\xf017")
+    ("owm-311"                         . "\xf019")
+    ("owm-312"                         . "\xf019")
+    ("owm-313"                         . "\xf01a")
+    ("owm-314"                         . "\xf019")
+    ("owm-321"                         . "\xf01c")
+    ("owm-500"                         . "\xf01c")
+    ("owm-501"                         . "\xf019")
+    ("owm-502"                         . "\xf019")
+    ("owm-503"                         . "\xf019")
+    ("owm-504"                         . "\xf019")
+    ("owm-511"                         . "\xf017")
+    ("owm-520"                         . "\xf01a")
+    ("owm-521"                         . "\xf01a")
+    ("owm-522"                         . "\xf01a")
+    ("owm-531"                         . "\xf01d")
+    ("owm-600"                         . "\xf01b")
+    ("owm-601"                         . "\xf01b")
+    ("owm-602"                         . "\xf0b5")
+    ("owm-611"                         . "\xf017")
+    ("owm-612"                         . "\xf017")
+    ("owm-615"                         . "\xf017")
+    ("owm-616"                         . "\xf017")
+    ("owm-620"                         . "\xf017")
+    ("owm-621"                         . "\xf01b")
+    ("owm-622"                         . "\xf01b")
+    ("owm-701"                         . "\xf01a")
+    ("owm-711"                         . "\xf062")
+    ("owm-721"                         . "\xf0b6")
+    ("owm-731"                         . "\xf063")
+    ("owm-741"                         . "\xf014")
+    ("owm-761"                         . "\xf063")
+    ("owm-762"                         . "\xf063")
+    ("owm-771"                         . "\xf011")
+    ("owm-781"                         . "\xf056")
+    ("owm-800"                         . "\xf00d")
+    ("owm-801"                         . "\xf011")
+    ("owm-802"                         . "\xf011")
+    ("owm-803"                         . "\xf012")
+    ("owm-804"                         . "\xf013")
+    ("owm-900"                         . "\xf056")
+    ("owm-901"                         . "\xf01d")
+    ("owm-902"                         . "\xf073")
+    ("owm-903"                         . "\xf076")
+    ("owm-904"                         . "\xf072")
+    ("owm-905"                         . "\xf021")
+    ("owm-906"                         . "\xf015")
+    ("owm-957"                         . "\xf050")
+    ("owm-day-200"                     . "\xf010")
+    ("owm-day-201"                     . "\xf010")
+    ("owm-day-202"                     . "\xf010")
+    ("owm-day-210"                     . "\xf005")
+    ("owm-day-211"                     . "\xf005")
+    ("owm-day-212"                     . "\xf005")
+    ("owm-day-221"                     . "\xf005")
+    ("owm-day-230"                     . "\xf010")
+    ("owm-day-231"                     . "\xf010")
+    ("owm-day-232"                     . "\xf010")
+    ("owm-day-300"                     . "\xf00b")
+    ("owm-day-301"                     . "\xf00b")
+    ("owm-day-302"                     . "\xf008")
+    ("owm-day-310"                     . "\xf008")
+    ("owm-day-311"                     . "\xf008")
+    ("owm-day-312"                     . "\xf008")
+    ("owm-day-313"                     . "\xf008")
+    ("owm-day-314"                     . "\xf008")
+    ("owm-day-321"                     . "\xf00b")
+    ("owm-day-500"                     . "\xf00b")
+    ("owm-day-501"                     . "\xf008")
+    ("owm-day-502"                     . "\xf008")
+    ("owm-day-503"                     . "\xf008")
+    ("owm-day-504"                     . "\xf008")
+    ("owm-day-511"                     . "\xf006")
+    ("owm-day-520"                     . "\xf009")
+    ("owm-day-521"                     . "\xf009")
+    ("owm-day-522"                     . "\xf009")
+    ("owm-day-531"                     . "\xf00e")
+    ("owm-day-600"                     . "\xf00a")
+    ("owm-day-601"                     . "\xf0b2")
+    ("owm-day-602"                     . "\xf00a")
+    ("owm-day-611"                     . "\xf006")
+    ("owm-day-612"                     . "\xf006")
+    ("owm-day-615"                     . "\xf006")
+    ("owm-day-616"                     . "\xf006")
+    ("owm-day-620"                     . "\xf006")
+    ("owm-day-621"                     . "\xf00a")
+    ("owm-day-622"                     . "\xf00a")
+    ("owm-day-701"                     . "\xf009")
+    ("owm-day-711"                     . "\xf062")
+    ("owm-day-721"                     . "\xf0b6")
+    ("owm-day-731"                     . "\xf063")
+    ("owm-day-741"                     . "\xf003")
+    ("owm-day-761"                     . "\xf063")
+    ("owm-day-762"                     . "\xf063")
+    ("owm-day-781"                     . "\xf056")
+    ("owm-day-800"                     . "\xf00d")
+    ("owm-day-801"                     . "\xf000")
+    ("owm-day-802"                     . "\xf000")
+    ("owm-day-803"                     . "\xf000")
+    ("owm-day-804"                     . "\xf00c")
+    ("owm-day-900"                     . "\xf056")
+    ("owm-day-902"                     . "\xf073")
+    ("owm-day-903"                     . "\xf076")
+    ("owm-day-904"                     . "\xf072")
+    ("owm-day-906"                     . "\xf004")
+    ("owm-day-957"                     . "\xf050")
+    ("owm-night-200"                   . "\xf02d")
+    ("owm-night-201"                   . "\xf02d")
+    ("owm-night-202"                   . "\xf02d")
+    ("owm-night-210"                   . "\xf025")
+    ("owm-night-211"                   . "\xf025")
+    ("owm-night-212"                   . "\xf025")
+    ("owm-night-221"                   . "\xf025")
+    ("owm-night-230"                   . "\xf02d")
+    ("owm-night-231"                   . "\xf02d")
+    ("owm-night-232"                   . "\xf02d")
+    ("owm-night-300"                   . "\xf02b")
+    ("owm-night-301"                   . "\xf02b")
+    ("owm-night-302"                   . "\xf028")
+    ("owm-night-310"                   . "\xf028")
+    ("owm-night-311"                   . "\xf028")
+    ("owm-night-312"                   . "\xf028")
+    ("owm-night-313"                   . "\xf028")
+    ("owm-night-314"                   . "\xf028")
+    ("owm-night-321"                   . "\xf02b")
+    ("owm-night-500"                   . "\xf02b")
+    ("owm-night-501"                   . "\xf028")
+    ("owm-night-502"                   . "\xf028")
+    ("owm-night-503"                   . "\xf028")
+    ("owm-night-504"                   . "\xf028")
+    ("owm-night-511"                   . "\xf026")
+    ("owm-night-520"                   . "\xf029")
+    ("owm-night-521"                   . "\xf029")
+    ("owm-night-522"                   . "\xf029")
+    ("owm-night-531"                   . "\xf02c")
+    ("owm-night-600"                   . "\xf02a")
+    ("owm-night-601"                   . "\xf0b4")
+    ("owm-night-602"                   . "\xf02a")
+    ("owm-night-611"                   . "\xf026")
+    ("owm-night-612"                   . "\xf026")
+    ("owm-night-615"                   . "\xf026")
+    ("owm-night-616"                   . "\xf026")
+    ("owm-night-620"                   . "\xf026")
+    ("owm-night-621"                   . "\xf02a")
+    ("owm-night-622"                   . "\xf02a")
+    ("owm-night-701"                   . "\xf029")
+    ("owm-night-711"                   . "\xf062")
+    ("owm-night-721"                   . "\xf0b6")
+    ("owm-night-731"                   . "\xf063")
+    ("owm-night-741"                   . "\xf04a")
+    ("owm-night-761"                   . "\xf063")
+    ("owm-night-762"                   . "\xf063")
+    ("owm-night-781"                   . "\xf056")
+    ("owm-night-800"                   . "\xf02e")
+    ("owm-night-801"                   . "\xf022")
+    ("owm-night-802"                   . "\xf022")
+    ("owm-night-803"                   . "\xf022")
+    ("owm-night-804"                   . "\xf086")
+    ("owm-night-900"                   . "\xf056")
+    ("owm-night-902"                   . "\xf073")
+    ("owm-night-903"                   . "\xf076")
+    ("owm-night-904"                   . "\xf072")
+    ("owm-night-906"                   . "\xf024")
+    ("owm-night-957"                   . "\xf050")
+    ("rain"                            . "\xf019")
+    ("rain-mix"                        . "\xf017")
+    ("rain-wind"                       . "\xf018")
+    ("raindrop"                        . "\xf078")
+    ("raindrops"                       . "\xf04e")
+    ("refresh"                         . "\xf04c")
+    ("refresh-alt"                     . "\xf04b")
+    ("sandstorm"                       . "\xf082")
+    ("showers"                         . "\xf01a")
+    ("sleet"                           . "\xf0b5")
+    ("small-craft-advisory"            . "\xf0cc")
+    ("smog"                            . "\xf074")
+    ("smoke"                           . "\xf062")
+    ("snow"                            . "\xf01b")
+    ("snow"                            . "\xf01b")
+    ("snow-wind"                       . "\xf064")
+    ("snowflake-cold"                  . "\xf076")
+    ("solar-eclipse"                   . "\xf06e")
+    ("sprinkle"                        . "\xf01c")
+    ("stars"                           . "\xf077")
+    ("storm-showers"                   . "\xf01d")
+    ("storm-showers"                   . "\xf01d")
+    ("storm-warning"                   . "\xf0ce")
+    ("strong-wind"                     . "\xf050")
+    ("sunrise"                         . "\xf051")
+    ("sunset"                          . "\xf052")
+    ("thermometer"                     . "\xf055")
+    ("thermometer-exterior"            . "\xf053")
+    ("thermometer-internal"            . "\xf054")
+    ("thunderstorm"                    . "\xf01e")
+    ("thunderstorm"                    . "\xf01e")
+    ("time-1"                          . "\xf08a")
+    ("time-10"                         . "\xf093")
+    ("time-11"                         . "\xf094")
+    ("time-12"                         . "\xf089")
+    ("time-2"                          . "\xf08b")
+    ("time-3"                          . "\xf08c")
+    ("time-4"                          . "\xf08d")
+    ("time-5"                          . "\xf08e")
+    ("time-6"                          . "\xf08f")
+    ("time-7"                          . "\xf090")
+    ("time-8"                          . "\xf091")
+    ("time-9"                          . "\xf092")
+    ("tornado"                         . "\xf056")
+    ("train"                           . "\xf0cb")
+    ("tsunami"                         . "\xf0c5")
+    ("umbrella"                        . "\xf084")
+    ("volcano"                         . "\xf0c8")
+    ("wind-beaufort-0"                 . "\xf0b7")
+    ("wind-beaufort-1"                 . "\xf0b8")
+    ("wind-beaufort-10"                . "\xf0c1")
+    ("wind-beaufort-11"                . "\xf0c2")
+    ("wind-beaufort-12"                . "\xf0c3")
+    ("wind-beaufort-2"                 . "\xf0b9")
+    ("wind-beaufort-3"                 . "\xf0ba")
+    ("wind-beaufort-4"                 . "\xf0bb")
+    ("wind-beaufort-5"                 . "\xf0bc")
+    ("wind-beaufort-6"                 . "\xf0bd")
+    ("wind-beaufort-7"                 . "\xf0be")
+    ("wind-beaufort-8"                 . "\xf0bf")
+    ("wind-beaufort-9"                 . "\xf0c0")
+    ("wind-direction"                  . "\xf0b1")
+    ("windy"                           . "\xf021")
+    ("wmo4680-00"                      . "\xf055")
+    ("wmo4680-01"                      . "\xf013")
+    ("wmo4680-02"                      . "\xf055")
+    ("wmo4680-03"                      . "\xf013")
+    ("wmo4680-04"                      . "\xf014")
+    ("wmo4680-05"                      . "\xf014")
+    ("wmo4680-10"                      . "\xf014")
+    ("wmo4680-11"                      . "\xf014")
+    ("wmo4680-12"                      . "\xf016")
+    ("wmo4680-18"                      . "\xf050")
+    ("wmo4680-20"                      . "\xf014")
+    ("wmo4680-21"                      . "\xf017")
+    ("wmo4680-22"                      . "\xf017")
+    ("wmo4680-23"                      . "\xf019")
+    ("wmo4680-24"                      . "\xf01b")
+    ("wmo4680-25"                      . "\xf015")
+    ("wmo4680-26"                      . "\xf01e")
+    ("wmo4680-27"                      . "\xf063")
+    ("wmo4680-28"                      . "\xf063")
+    ("wmo4680-29"                      . "\xf063")
+    ("wmo4680-30"                      . "\xf014")
+    ("wmo4680-31"                      . "\xf014")
+    ("wmo4680-32"                      . "\xf014")
+    ("wmo4680-33"                      . "\xf014")
+    ("wmo4680-34"                      . "\xf014")
+    ("wmo4680-35"                      . "\xf014")
+    ("wmo4680-40"                      . "\xf017")
+    ("wmo4680-41"                      . "\xf01c")
+    ("wmo4680-42"                      . "\xf019")
+    ("wmo4680-43"                      . "\xf01c")
+    ("wmo4680-44"                      . "\xf019")
+    ("wmo4680-45"                      . "\xf015")
+    ("wmo4680-46"                      . "\xf015")
+    ("wmo4680-47"                      . "\xf01b")
+    ("wmo4680-48"                      . "\xf01b")
+    ("wmo4680-50"                      . "\xf01c")
+    ("wmo4680-51"                      . "\xf01c")
+    ("wmo4680-52"                      . "\xf019")
+    ("wmo4680-53"                      . "\xf019")
+    ("wmo4680-54"                      . "\xf076")
+    ("wmo4680-55"                      . "\xf076")
+    ("wmo4680-56"                      . "\xf076")
+    ("wmo4680-57"                      . "\xf01c")
+    ("wmo4680-58"                      . "\xf019")
+    ("wmo4680-60"                      . "\xf01c")
+    ("wmo4680-61"                      . "\xf01c")
+    ("wmo4680-62"                      . "\xf019")
+    ("wmo4680-63"                      . "\xf019")
+    ("wmo4680-64"                      . "\xf015")
+    ("wmo4680-65"                      . "\xf015")
+    ("wmo4680-66"                      . "\xf015")
+    ("wmo4680-67"                      . "\xf017")
+    ("wmo4680-68"                      . "\xf017")
+    ("wmo4680-70"                      . "\xf01b")
+    ("wmo4680-71"                      . "\xf01b")
+    ("wmo4680-72"                      . "\xf01b")
+    ("wmo4680-73"                      . "\xf01b")
+    ("wmo4680-74"                      . "\xf076")
+    ("wmo4680-75"                      . "\xf076")
+    ("wmo4680-76"                      . "\xf076")
+    ("wmo4680-77"                      . "\xf01b")
+    ("wmo4680-78"                      . "\xf076")
+    ("wmo4680-80"                      . "\xf019")
+    ("wmo4680-81"                      . "\xf01c")
+    ("wmo4680-82"                      . "\xf019")
+    ("wmo4680-83"                      . "\xf019")
+    ("wmo4680-84"                      . "\xf01d")
+    ("wmo4680-85"                      . "\xf017")
+    ("wmo4680-86"                      . "\xf017")
+    ("wmo4680-87"                      . "\xf017")
+    ("wmo4680-89"                      . "\xf015")
+    ("wmo4680-90"                      . "\xf016")
+    ("wmo4680-91"                      . "\xf01d")
+    ("wmo4680-92"                      . "\xf01e")
+    ("wmo4680-93"                      . "\xf01e")
+    ("wmo4680-94"                      . "\xf016")
+    ("wmo4680-95"                      . "\xf01e")
+    ("wmo4680-96"                      . "\xf01e")
+    ("wmo4680-99"                      . "\xf056")
+    ("wu-chanceflurries"               . "\xf064")
+    ("wu-chancerain"                   . "\xf019")
+    ("wu-chancesleat"                  . "\xf0b5")
+    ("wu-chancesnow"                   . "\xf01b")
+    ("wu-chancetstorms"                . "\xf01e")
+    ("wu-clear"                        . "\xf00d")
+    ("wu-cloudy"                       . "\xf002")
+    ("wu-flurries"                     . "\xf064")
+    ("wu-hazy"                         . "\xf0b6")
+    ("wu-mostlycloudy"                 . "\xf002")
+    ("wu-mostlysunny"                  . "\xf00d")
+    ("wu-partlycloudy"                 . "\xf002")
+    ("wu-partlysunny"                  . "\xf00d")
+    ("wu-rain"                         . "\xf01a")
+    ("wu-sleat"                        . "\xf0b5")
+    ("wu-snow"                         . "\xf01b")
+    ("wu-sunny"                        . "\xf00d")
+    ("wu-tstorms"                      . "\xf01e")
+    ("wu-unknown"                      . "\xf00d")
+    ("yahoo-0"                         . "\xf056")
+    ("yahoo-1"                         . "\xf00e")
+    ("yahoo-10"                        . "\xf015")
+    ("yahoo-11"                        . "\xf01a")
+    ("yahoo-12"                        . "\xf01a")
+    ("yahoo-13"                        . "\xf01b")
+    ("yahoo-14"                        . "\xf00a")
+    ("yahoo-15"                        . "\xf064")
+    ("yahoo-16"                        . "\xf01b")
+    ("yahoo-17"                        . "\xf015")
+    ("yahoo-18"                        . "\xf017")
+    ("yahoo-19"                        . "\xf063")
+    ("yahoo-2"                         . "\xf073")
+    ("yahoo-20"                        . "\xf014")
+    ("yahoo-21"                        . "\xf021")
+    ("yahoo-22"                        . "\xf062")
+    ("yahoo-23"                        . "\xf050")
+    ("yahoo-24"                        . "\xf050")
+    ("yahoo-25"                        . "\xf076")
+    ("yahoo-26"                        . "\xf013")
+    ("yahoo-27"                        . "\xf031")
+    ("yahoo-28"                        . "\xf002")
+    ("yahoo-29"                        . "\xf031")
+    ("yahoo-3"                         . "\xf01e")
+    ("yahoo-30"                        . "\xf002")
+    ("yahoo-31"                        . "\xf02e")
+    ("yahoo-32"                        . "\xf00d")
+    ("yahoo-3200"                      . "\xf077")
+    ("yahoo-33"                        . "\xf083")
+    ("yahoo-34"                        . "\xf00c")
+    ("yahoo-35"                        . "\xf017")
+    ("yahoo-36"                        . "\xf072")
+    ("yahoo-37"                        . "\xf00e")
+    ("yahoo-38"                        . "\xf00e")
+    ("yahoo-39"                        . "\xf00e")
+    ("yahoo-4"                         . "\xf01e")
+    ("yahoo-40"                        . "\xf01a")
+    ("yahoo-41"                        . "\xf064")
+    ("yahoo-42"                        . "\xf01b")
+    ("yahoo-43"                        . "\xf064")
+    ("yahoo-44"                        . "\xf00c")
+    ("yahoo-45"                        . "\xf00e")
+    ("yahoo-46"                        . "\xf01b")
+    ("yahoo-47"                        . "\xf00e")
+    ("yahoo-5"                         . "\xf017")
+    ("yahoo-6"                         . "\xf017")
+    ("yahoo-7"                         . "\xf017")
+    ("yahoo-8"                         . "\xf015")
+    ("yahoo-9"                         . "\xf01a")
+
+    ))
+
+(provide 'data-weathericons)
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons-project.json b/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons-project.json
new file mode 100644
index 00000000..84841824
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons-project.json
@@ -0,0 +1,5341 @@
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+          "isMulticolor2": false,
+          "tags": [
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+          "defaultCode": 59002,
+          "grid": 20,
+          "attrs": []
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+        {
+          "id": 172,
+          "paths": [
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+          ],
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+          "isMulticolor2": false,
+          "tags": [
+            "uniE678"
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+          "defaultCode": 59000,
+          "grid": 20,
+          "attrs": []
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+    "showGlyphs": true,
+    "showQuickUse": true,
+    "showQuickUse2": true,
+    "showSVGs": true,
+    "fontPref": {
+      "prefix": "icon-",
+      "metadata": {
+        "fontFamily": "all-the-icons",
+        "majorVersion": 2,
+        "minorVersion": 0,
+        "description": "Developer Icon Font for us in Emacs with all-the-icons.el",
+        "license": "MIT",
+        "licenseURL": "https://opensource.org/licenses/MIT",
+        "fontURL": "https://github.com/domtronn/all-the-icons.el",
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+  },
+  "uid": -1
+}
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons.ttf b/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons.ttf
new file mode 100755
index 00000000..634d48e9
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/all-the-icons.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/file-icons.ttf b/.emacs.d.back/packages/all-the-icons/fonts/file-icons.ttf
new file mode 100644
index 00000000..5302538b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/file-icons.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/fontawesome.ttf b/.emacs.d.back/packages/all-the-icons/fonts/fontawesome.ttf
new file mode 100644
index 00000000..f221e50a
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/fontawesome.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/material-design-icons.ttf b/.emacs.d.back/packages/all-the-icons/fonts/material-design-icons.ttf
new file mode 100644
index 00000000..7015564a
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/material-design-icons.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/octicons.ttf b/.emacs.d.back/packages/all-the-icons/fonts/octicons.ttf
new file mode 100644
index 00000000..6f3edd66
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/octicons.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/fonts/weathericons.ttf b/.emacs.d.back/packages/all-the-icons/fonts/weathericons.ttf
new file mode 100755
index 00000000..948f0a5d
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/fonts/weathericons.ttf
diff --git a/.emacs.d.back/packages/all-the-icons/logo.png b/.emacs.d.back/packages/all-the-icons/logo.png
new file mode 100644
index 00000000..7f30e057
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/logo.png
diff --git a/.emacs.d.back/packages/all-the-icons/test/all-the-icons-test.el b/.emacs.d.back/packages/all-the-icons/test/all-the-icons-test.el
new file mode 100644
index 00000000..0fae192d
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/all-the-icons-test.el
@@ -0,0 +1,48 @@
+;;; all-the-icons-test.el --- Tests for `all-the-icons'
+
+;; Copyright (C) 2017  Dominic Charlesworth <dgc336@gmail.com>
+
+;; Author: Dominic Charlesworth <dgc336@gmail.com>
+;; Keywords: test
+;; Created: 09 May 2017
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License
+;; as published by the Free Software Foundation; either version 3
+;; of the License, or (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Test cases for `all-the-icons'
+
+;; Define all tests for mode icons
+(require 'f)
+
+(defvar all-the-icons--root-test (f-dirname (f-this-file)))
+(defvar all-the-icons--root-code (f-parent all-the-icons--root-test))
+
+(require 'all-the-icons (expand-file-name "all-the-icons.el" all-the-icons--root-code))
+
+(cl-loop
+ for alist in (apropos-internal "^all-the-icons-[a-z\\-]*icon-alist$")
+ do (cl-loop
+     for config in (symbol-value alist)
+     do (cl-destructuring-bind (mode f &optional icon &rest args) config
+          (when icon
+            (eval
+             `(ert-deftest ,(intern (format "all-the-icons--validate:%s:%s" alist mode)) ()
+                ,(format "A test to validate that the config for %s in `%s' is correct" icon alist)
+                (should (funcall ',f ,icon))))))))
+
+(ert "all-the-icons--validate:")
+
+(provide 'all-the-icons-test)
+;;; all-the-icons-test.el ends here
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.babelrc b/.emacs.d.back/packages/all-the-icons/test/example-dir/.babelrc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.babelrc
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.bashrc b/.emacs.d.back/packages/all-the-icons/test/example-dir/.bashrc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.bashrc
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.bowerrc b/.emacs.d.back/packages/all-the-icons/test/example-dir/.bowerrc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.bowerrc
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.dockerfile b/.emacs.d.back/packages/all-the-icons/test/example-dir/.dockerfile
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.dockerfile
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.eslintrc.json b/.emacs.d.back/packages/all-the-icons/test/example-dir/.eslintrc.json
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.eslintrc.json
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.node-version b/.emacs.d.back/packages/all-the-icons/test/example-dir/.node-version
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.node-version
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/.tags b/.emacs.d.back/packages/all-the-icons/test/example-dir/.tags
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/.tags
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/LICENSE b/.emacs.d.back/packages/all-the-icons/test/example-dir/LICENSE
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/LICENSE
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/TAGS b/.emacs.d.back/packages/all-the-icons/test/example-dir/TAGS
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/TAGS
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/TODO b/.emacs.d.back/packages/all-the-icons/test/example-dir/TODO
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/TODO
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.key b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.key
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.key
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.p12 b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.p12
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.p12
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.pem b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.pem
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/cert.pem
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.clj b/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.clj
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.clj
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.cljc b/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.cljc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/clojure.cljc
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/coffee.coffee b/.emacs.d.back/packages/all-the-icons/test/example-dir/coffee.coffee
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/coffee.coffee
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/css.css b/.emacs.d.back/packages/all-the-icons/test/example-dir/css.css
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/css.css
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/data.dat b/.emacs.d.back/packages/all-the-icons/test/example-dir/data.dat
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/data.dat
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/doc.pdf b/.emacs.d.back/packages/all-the-icons/test/example-dir/doc.pdf
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/doc.pdf
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/elisp.el b/.emacs.d.back/packages/all-the-icons/test/example-dir/elisp.el
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/elisp.el
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.eex b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.eex
new file mode 100644
index 00000000..54d582ff
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.eex
@@ -0,0 +1 @@
+elixir
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.ex b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.ex
new file mode 100644
index 00000000..54d582ff
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.ex
@@ -0,0 +1 @@
+elixir
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.exs b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.exs
new file mode 100644
index 00000000..54d582ff
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/elixir.exs
@@ -0,0 +1 @@
+elixir
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/elm.elm b/.emacs.d.back/packages/all-the-icons/test/example-dir/elm.elm
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/elm.elm
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.erl b/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.erl
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.erl
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.hrl b/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.hrl
new file mode 100644
index 00000000..01058d84
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/erlang.hrl
@@ -0,0 +1 @@
+g
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/go.go b/.emacs.d.back/packages/all-the-icons/test/example-dir/go.go
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/go.go
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/gruntfile.js b/.emacs.d.back/packages/all-the-icons/test/example-dir/gruntfile.js
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/gruntfile.js
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/gulpfile.js b/.emacs.d.back/packages/all-the-icons/test/example-dir/gulpfile.js
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/gulpfile.js
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/handlebar.hbs b/.emacs.d.back/packages/all-the-icons/test/example-dir/handlebar.hbs
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/handlebar.hbs
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/haskell.hs b/.emacs.d.back/packages/all-the-icons/test/example-dir/haskell.hs
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/haskell.hs
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/html.erb b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.erb
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.erb
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/html.haml b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.haml
new file mode 100644
index 00000000..abaf5423
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.haml
@@ -0,0 +1 @@
+g  
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/html.slim b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.slim
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/html.slim
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/image.png b/.emacs.d.back/packages/all-the-icons/test/example-dir/image.png
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/image.png
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/java.java b/.emacs.d.back/packages/all-the-icons/test/example-dir/java.java
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/java.java
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/js.js b/.emacs.d.back/packages/all-the-icons/test/example-dir/js.js
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/js.js
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/jsx.jsx b/.emacs.d.back/packages/all-the-icons/test/example-dir/jsx.jsx
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/jsx.jsx
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/julia.jl b/.emacs.d.back/packages/all-the-icons/test/example-dir/julia.jl
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/julia.jl
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/markdown.md b/.emacs.d.back/packages/all-the-icons/test/example-dir/markdown.md
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/markdown.md
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/mix.lock b/.emacs.d.back/packages/all-the-icons/test/example-dir/mix.lock
new file mode 100644
index 00000000..54d582ff
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/mix.lock
@@ -0,0 +1 @@
+elixir
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.ml b/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.ml
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.ml
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.mli b/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.mli
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/ocaml.mli
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/org.org b/.emacs.d.back/packages/all-the-icons/test/example-dir/org.org
new file mode 100644
index 00000000..01058d84
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/org.org
@@ -0,0 +1 @@
+g
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/package.json b/.emacs.d.back/packages/all-the-icons/test/example-dir/package.json
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/package.json
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/package.lock.json b/.emacs.d.back/packages/all-the-icons/test/example-dir/package.lock.json
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/package.lock.json
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/perl.pl b/.emacs.d.back/packages/all-the-icons/test/example-dir/perl.pl
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/perl.pl
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/php.php b/.emacs.d.back/packages/all-the-icons/test/example-dir/php.php
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/php.php
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/python.py b/.emacs.d.back/packages/all-the-icons/test/example-dir/python.py
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/python.py
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/readme.md b/.emacs.d.back/packages/all-the-icons/test/example-dir/readme.md
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/readme.md
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.re b/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.re
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.re
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.rei b/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.rei
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/reason.rei
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/ruby.rb b/.emacs.d.back/packages/all-the-icons/test/example-dir/ruby.rb
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/ruby.rb
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/sass.scss b/.emacs.d.back/packages/all-the-icons/test/example-dir/sass.scss
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/sass.scss
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/scala.scala b/.emacs.d.back/packages/all-the-icons/test/example-dir/scala.scala
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/scala.scala
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.cson b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.cson
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.cson
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.json b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.json
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.json
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.yml b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.yml
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/settings.yml
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.fish b/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.fish
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.fish
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.zsh b/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.zsh
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/shell.zsh
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/stylus.styl b/.emacs.d.back/packages/all-the-icons/test/example-dir/stylus.styl
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/stylus.styl
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/swift.swift b/.emacs.d.back/packages/all-the-icons/test/example-dir/swift.swift
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/swift.swift
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.js b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.js
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.js
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.jsx b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.jsx
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-spec.jsx
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/test-test.ext b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-test.ext
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/test-test.ext
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/testSpec.ext b/.emacs.d.back/packages/all-the-icons/test/example-dir/testSpec.ext
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/testSpec.ext
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/testTest.ext b/.emacs.d.back/packages/all-the-icons/test/example-dir/testTest.ext
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/testTest.ext
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/text.txt b/.emacs.d.back/packages/all-the-icons/test/example-dir/text.txt
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/text.txt
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-spec.ts b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-spec.ts
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-spec.ts
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-test.ts b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-test.ts
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript-test.ts
@@ -0,0 +1 @@
+ 
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.d.ts b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.d.ts
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.d.ts
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.ts b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.ts
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/typescript.ts
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/video.mp4 b/.emacs.d.back/packages/all-the-icons/test/example-dir/video.mp4
new file mode 100644
index 00000000..0519ecba
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/video.mp4
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/webpack.config b/.emacs.d.back/packages/all-the-icons/test/example-dir/webpack.config
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/webpack.config
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/xml.xml b/.emacs.d.back/packages/all-the-icons/test/example-dir/xml.xml
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/xml.xml
diff --git a/.emacs.d.back/packages/all-the-icons/test/example-dir/yarn.lock b/.emacs.d.back/packages/all-the-icons/test/example-dir/yarn.lock
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/packages/all-the-icons/test/example-dir/yarn.lock
diff --git a/.emacs.d.back/projectile-bookmarks.eld b/.emacs.d.back/projectile-bookmarks.eld
new file mode 100644
index 00000000..03c70ca6
--- /dev/null
+++ b/.emacs.d.back/projectile-bookmarks.eld
@@ -0,0 +1 @@
+("~/.emacs.d/" "~/code/massive/cocacola/new-backend/" "~/code/massive/cocacola/frontend/" "~/code/personal/pedidos-ya/" "~/.conky/Thinkpad/" "~/code/personal/dotfiles/" "~/code/personal/identidadMisional/backend/" "~/code/personal/webpage/web/" "~/code/personal/deryssevilla.design/")
\ No newline at end of file
diff --git a/.emacs.d.back/recentf b/.emacs.d.back/recentf
new file mode 100644
index 00000000..834f69be
--- /dev/null
+++ b/.emacs.d.back/recentf
@@ -0,0 +1,31 @@
+;;; Automatically generated by ‘recentf’ on Mon Dec 23 16:54:18 2019.
+
+(setq recentf-list
+      '(
+        "/home/roger/Dropbox/org/rogs.org"
+        "/home/roger/Dropbox/org/personal.org"
+        "/home/roger/Dropbox/org/massive.org"
+        "/home/roger/Dropbox/org/massive-dailies.org"
+        "/home/roger/Dropbox/org/logbook-work.org"
+        "/home/roger/Dropbox/org/logbook-personal.org"
+        "/home/roger/.emacs.d/bookmarks"
+        "/home/roger/code/massive/cocacola/new-backend/app/core/management/commands/load_pincodes.py"
+        "/home/roger/code/massive/cocacola/new-backend/app/core/models.py"
+        "/home/roger/Descargas/new-codes/pedidoAdicional.txt"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Counter/index.js"
+        "/home/roger/.emacs.d/core/rogs-keybindings.el"
+        "/home/roger/.emacs.d/init.el"
+        "/home/roger/code/massive/cocacola/new-backend/app/mail/connection.py"
+        "/home/roger/code/massive/cocacola/new-backend/app/pincodes/serializers.py"
+        "/home/roger/code/massive/cocacola/new-backend/docker-compose.yml"
+        "/home/roger/code/massive/cocacola/frontend/app/theme.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/faqs/Faqs/index.js"
+        "/home/roger/code/massive/cocacola/frontend/app/containers/Home/home.reducer.js"
+        ))
+
+(setq recentf-filter-changer-current 'nil)
+
+
+;; Local Variables:
+;; coding: utf-8-emacs
+;; End:
diff --git a/.emacs.d.back/scripts/ics-to-org.el b/.emacs.d.back/scripts/ics-to-org.el
new file mode 100644
index 00000000..7c4f71f7
--- /dev/null
+++ b/.emacs.d.back/scripts/ics-to-org.el
@@ -0,0 +1 @@
+(icalendar-import-file "/tmp/calendar/personal-calendar.ics" "~/.emacs.d/diary")
diff --git a/.emacs.d.back/scripts/ics-to-org.sh b/.emacs.d.back/scripts/ics-to-org.sh
new file mode 100755
index 00000000..df467dfb
--- /dev/null
+++ b/.emacs.d.back/scripts/ics-to-org.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+# This is a cron that runs every 15 mins and populates my emacs diary file with my calendar items
+
+# Downloading calendar
+echo "Downloading Calendar"
+mkdir -p /tmp/calendar
+cd /tmp/calendar
+wget "https://cloud.rogs.me/remote.php/dav/public-calendars/5YgCPsaaye9KgbZr?export" -O "personal-calendar.ics" -c
+
+#Generating the file
+
+echo "#Generating the file"
+rm ~/.emacs.d/diary
+emacs --batch -l ~/.emacs.d/scripts/ics-to-org.el
+
+echo "#Deleting everything"
+#Deleting everything
+rm -r /tmp/calendar
diff --git a/.emacs.d.back/session.10107263a77f8e36a9156839473151714400000011880068 b/.emacs.d.back/session.10107263a77f8e36a9156839473151714400000011880068
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.10107263a77f8e36a9156839473151714400000011880068
diff --git a/.emacs.d.back/session.102ce75c4c1375b715157442767912695800000012860061 b/.emacs.d.back/session.102ce75c4c1375b715157442767912695800000012860061
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.102ce75c4c1375b715157442767912695800000012860061
diff --git a/.emacs.d.back/session.104ec7930d24332960157141513053438800000012560083 b/.emacs.d.back/session.104ec7930d24332960157141513053438800000012560083
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.104ec7930d24332960157141513053438800000012560083
diff --git a/.emacs.d.back/session.106270f871399105aa15748611252380800000016720063 b/.emacs.d.back/session.106270f871399105aa15748611252380800000016720063
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.106270f871399105aa15748611252380800000016720063
diff --git a/.emacs.d.back/session.108499426469af94b0157373770963494600000013020061 b/.emacs.d.back/session.108499426469af94b0157373770963494600000013020061
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.108499426469af94b0157373770963494600000013020061
diff --git a/.emacs.d.back/session.10a4e62df171a4a467157019650186186800000012650066 b/.emacs.d.back/session.10a4e62df171a4a467157019650186186800000012650066
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.10a4e62df171a4a467157019650186186800000012650066
diff --git a/.emacs.d.back/session.10efe468ee96c49553157186830422396500000012080060 b/.emacs.d.back/session.10efe468ee96c49553157186830422396500000012080060
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.emacs.d.back/session.10efe468ee96c49553157186830422396500000012080060
diff --git a/.emacs.d.back/setup/setup-flycheck-mode.el b/.emacs.d.back/setup/setup-flycheck-mode.el
new file mode 100644
index 00000000..062dfe93
--- /dev/null
+++ b/.emacs.d.back/setup/setup-flycheck-mode.el
@@ -0,0 +1,54 @@
+;;; setup-flycheck-mode.el --- rogs default flycheck mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for flycheck mode
+;;
+;;; Code:
+
+;; FlyCheck configs
+;; More help: http://codewinds.com/blog/2015-04-02-emacs-flycheck-eslint-jsx.html#configuring_emacs
+;; http://www.flycheck.org/manual/latest/index.html
+;; http://codewinds.com/blog/2015-04-02-emacs-flycheck-eslint-jsx.html
+(require 'flycheck)
+
+;; Turn on flychecking globally
+(add-hook 'after-init-hook #'global-flycheck-mode)
+
+;; Disable jshint since we prefer eslint checking
+(setq-default flycheck-disabled-checkers
+  (append flycheck-disabled-checkers
+          '(javascript-jshint)))
+
+;; Use eslint with web-mode for jsx files
+(flycheck-add-mode 'javascript-eslint 'web-mode)
+
+;; Customize flycheck temp file prefix
+(setq-default flycheck-temp-prefix ".flycheck")
+
+;; Disable json-jsonlist checking for json files
+(setq-default flycheck-disabled-checkers
+  (append flycheck-disabled-checkers
+          '(json-jsonlist)))
+
+;; Use local eslint from node_modules before global
+;; http://emacs.stackexchange.com/questions/21205/flycheck-with-file-relative-eslint-executable
+(defun my/use-eslint-from-node-modules ()
+  (let* ((root (locate-dominating-file
+                (or (buffer-file-name) default-directory)
+                "node_modules"))
+         (eslint (and root
+                      (expand-file-name "node_modules/eslint/bin/eslint.js"
+                                        root))))
+    (when (and eslint (file-executable-p eslint))
+      (setq-local flycheck-javascript-eslint-executable eslint))))
+(add-hook 'flycheck-mode-hook #'my/use-eslint-from-node-modules)
+
+;; https://github.com/purcell/exec-path-from-shell
+;; Only need exec-path-from-shell on OSX
+;; This hopefully sets up path and other vars better
+(when (memq window-system '(mac ns))
+  (exec-path-from-shell-initialize))
+
+(provide 'setup-flycheck-mode)
+;;; setup-flycheck-mode.el ends here
diff --git a/.emacs.d.back/setup/setup-js-mode.el b/.emacs.d.back/setup/setup-js-mode.el
new file mode 100644
index 00000000..d782154f
--- /dev/null
+++ b/.emacs.d.back/setup/setup-js-mode.el
@@ -0,0 +1,66 @@
+;;; setup-js-mode.el --- rogs default js mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for js mode
+;;
+;;; Code:
+
+;; Associates json-mode to all .eslintrc files
+(add-to-list 'auto-mode-alist '("\\.eslintrc\\'" . json-mode))
+
+;; JS2 mode
+(require 'js2-refactor)
+(require 'xref-js2)
+
+(add-to-list 'auto-mode-alist '("\\.js\\'" . js2-mode))
+(add-to-list 'auto-mode-alist '("\\.js\\'" . rjsx-mode))
+(add-hook 'js2-mode-hook #'js2-refactor-mode)
+(add-hook 'js2-mode-hook #'emmet-mode)
+(setq emmet-expand-jsx-className? t)
+(js2r-add-keybindings-with-prefix "C-c C-f")
+(define-key js2-mode-map (kbd "C-k") #'js2r-kill)
+(define-key js2-mode-map (kbd "C-c ;") #'comment-line)
+(define-key js2-mode-map (kbd "C-c C-;") #'comment-or-uncomment-region)
+
+;; js-mode (which js2 is based on) binds "M-." which conflicts with xref, so
+;; unbind it.
+(define-key js-mode-map (kbd "M-.") nil)
+
+(add-hook 'js2-mode-hook (lambda ()
+  (add-hook 'xref-backend-functions #'xref-js2-xref-backend nil t)))
+
+(setq js2-highlight-level 3)
+
+;; Turn off js2 mode errors & warnings (we lean on eslint/standard)
+(setq js2-mode-show-parse-errors nil)
+(setq js2-mode-show-strict-warnings nil)
+
+;; Tern
+(require 'company)
+(require 'company-tern)
+
+(add-to-list 'company-backends 'company-tern)
+(add-hook 'js2-mode-hook (lambda ()
+                           (tern-mode)
+                           (company-mode)))
+
+;; Disable completion keybindings, as we use xref-js2 instead
+(define-key tern-mode-keymap (kbd "M-.") nil)
+(define-key tern-mode-keymap (kbd "M-,") nil)
+
+;; Indium
+(unless (package-installed-p 'indium)
+  (package-install 'indium))
+(require 'indium)
+(add-hook 'js2-mode-hook #'indium-interaction-mode)
+(define-key js2-mode-map (kbd "C-c i") 'indium-launch)
+
+;; PrettierJS
+(eval-after-load 'js2-mode
+  '(progn
+     (add-hook 'js2-mode-hook #'add-node-modules-path)
+     (add-hook 'js2-mode-hook #'prettier-js-mode)))
+
+(provide 'setup-js-mode)
+;;; setup-js-mode.el ends here
diff --git a/.emacs.d.back/setup/setup-org-mode.el b/.emacs.d.back/setup/setup-org-mode.el
new file mode 100644
index 00000000..49882364
--- /dev/null
+++ b/.emacs.d.back/setup/setup-org-mode.el
@@ -0,0 +1,114 @@
+;;; setup-org-mode.el --- rogs default org mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for org mode
+;;
+;;; Code:
+
+(setq org-agenda-files (quote ("~/Dropbox/org")))
+
+;; Keyword and faces
+(setq-default org-todo-keywords
+              '((sequence "TODO(t!)" "IN_PROGRESS(i!)" "WAIT(w@/!)" "SOMEDAY(s!)" "|" "DONE(d@/!)" "CANCELLED(c@/!)")))
+
+(setq-default org-todo-keyword-faces
+      '(( "TODO" . (:foreground "white" :background "darkorchid4" :weight bold))
+        ( "IN_PROGRESS" . (:background "deeppink3" :weight bold))
+        ( "WAIT" (:background "red" :weight bold))
+        ( "SOMEDAY" . (:foreground "white" :background "#00807E" :weight bold))
+        ( "DONE" . (:foreground "white" :background "forest green" :weight bold))
+        ( "CANCELLED" . (:foreground "light gray" :slant italic))))
+
+;; Priorities
+;; A: Do it now
+;; B: Decide when to do it
+;; C: Delegate it
+;; D: Just an idea
+(setq org-highest-priority ?A)
+(setq org-lowest-priority  ?D)
+(setq org-default-priority ?B)
+(setq org-priority-faces '((?A . (:foreground "white" :background "dark red" :weight bold))
+                           (?B . (:foreground "white" :background "dark green" :weight bold))
+                           (?C . (:foreground "yellow"))
+                           (?D . (:foreground "gray"))))
+
+;; Time formats
+(setq org-time-stamp-custom-formats '("<%d/%m/%y %a>" . "<%d/%m/%y %a %H:%M>"))
+(setq org-display-custom-times t)
+
+;; Tags
+(setq org-tag-alist '(("payments" . ?p) ("girlfriend" . ?g) ("call" . ?c) ("mail" . ?m) ("rogs" . ?r) ("jobs" . ?j) ("backend" . ?b) ("frontend" . ?f) ("devops" . ?d) ("bugs" . ?u) ("improvements" . ?i)))
+
+;; Log into drawer
+(setq org-log-into-drawer t)
+
+;; Archive location
+(setq org-archive-location "archive/%s_archive::")
+
+;; Log when reschedule
+(setq org-log-reschedule t)
+
+;; Log when done
+(setq org-log-done t)
+
+;; Capture templates
+(setq org-capture-templates
+      (quote
+       (
+        ;; Personal templates
+        ("p" "Templates for personal")
+        ("pr" "Non-scheduled" entry
+         (file+headline "~/Dropbox/org/personal.org" "Captured")
+         (file "~/.emacs.d/org/templates/basic-task.txt"))
+        ("ps" "Scheduled" entry
+         (file+headline "~/Dropbox/org/personal.org" "Captured")
+         (file "~/.emacs.d/org/templates/scheduled-task.txt"))
+        ("pl" "Logbook entry for Personal" entry (file+datetree "logbook-personal.org") "** %U - %^{Activity}  :LOG:")
+        ;; Massive templates
+        ("m" "Templates for massive")
+        ("mr" "Non-scheduled" entry
+         (file+headline "~/Dropbox/org/massive.org" "Captured")
+         (file "~/.emacs.d/org/templates/basic-task.txt"))
+        ("ms" "Scheduled" entry
+         (file+headline "~/Dropbox/org/massive.org" "Captured")
+         (file "~/.emacs.d/org/templates/scheduled-task.txt"))
+        ("ml" "Logbook entry for Massive" entry (file+datetree "logbook-work.org") "** %U - %^{Activity}  :LOG:")
+        ("mm" "New daily meeting" entry
+         (file+datetree "~/Dropbox/org/massive-dailies.org")
+         (file "~/.emacs.d/org/templates/meeting.txt"))
+        ;; Rogs templates
+        ("r" "Templates for rogs")
+        ("rr" "Non-scheduled" entry
+         (file+headline "~/Dropbox/org/rogs.org" "Captured")
+         (file "~/.emacs.d/org/templates/basic-task.txt"))
+        ("rs" "Scheduled" entry
+         (file+headline "~/Dropbox/org/rogs.org" "Captured")
+         (file "~/.emacs.d/org/templates/scheduled-task.txt"))
+        )))
+
+;; Wrap long lines
+(add-hook 'text-mode-hook 'turn-on-visual-line-mode)
+
+;; Enforce ordered tasks and add a tag
+(setq org-enforce-todo-dependencies t)
+(setq org-track-ordered-property-with-tag t)
+(setq org-agenda-dim-blocked-tasks t)
+(setq org-enforce-todo-checkbox-dependencies t)
+
+;; Org habits
+(require 'org-habit)
+(setq org-habit-graph-column 50)
+
+;; Include diary
+(setq org-agenda-include-diary t)
+
+;; Keep line breaks on export
+(setq org-export-preserve-breaks t)
+
+;; Org bullets
+(require 'org-bullets)
+(add-hook 'org-mode-hook (lambda () (org-bullets-mode 1)))
+
+(provide 'setup-org-mode)
+;;; setup-org-mode.el ends here
diff --git a/.emacs.d.back/setup/setup-python-mode.el b/.emacs.d.back/setup/setup-python-mode.el
new file mode 100644
index 00000000..d7897f95
--- /dev/null
+++ b/.emacs.d.back/setup/setup-python-mode.el
@@ -0,0 +1,13 @@
+;;; setup-python-mode.el --- rogs default python mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for python mode
+;;
+;;; Code:
+
+(elpy-enable)
+(setq elpy-rpc-backend "jedi")
+
+(provide 'setup-python-mode)
+;;; setup-python-mode.el ends here
diff --git a/.emacs.d.back/setup/setup-web-mode.el b/.emacs.d.back/setup/setup-web-mode.el
new file mode 100644
index 00000000..7f6857e7
--- /dev/null
+++ b/.emacs.d.back/setup/setup-web-mode.el
@@ -0,0 +1,73 @@
+;;; setup-web-mode.el --- rogs default web mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for web mode
+;;
+;;; Code:
+
+;; Web Mode: Begin
+;; JSX configs: http://cha1tanya.com/2015/06/20/configuring-web-mode-with-jsx.html
+(require 'web-mode)
+(add-to-list 'auto-mode-alist '("\\.phtml\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.tpl\\.php\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.[agj]sp\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.as[cp]x\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.erb\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.mustache\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.djhtml\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.html\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.css\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.scss\\'" . web-mode))
+(add-to-list 'auto-mode-alist '("\\.es6\\'" . web-mode))
+
+;; Use web-mode for .jsx files
+(add-to-list 'auto-mode-alist '("\\.jsx$" . web-mode))
+
+;; Use web-mode for .hbs files
+(add-to-list 'auto-mode-alist '("\\.hbs$" . web-mode))
+
+(setq web-mode-content-types-alist
+      '(("jsx" . "\\.js[x]?\\'")
+        ("javascript" . "\\.es6?\\'")))
+
+(defadvice web-mode-highlight-part (around tweak-jsx activate)
+  (if (equal web-mode-content-type "jsx")
+      (let ((web-mode-enable-part-face nil))
+        ad-do-it)
+    ad-do-it))
+
+(defadvice web-mode-highlight-part (around tweak-jsx activate)
+  (if (equal web-mode-content-type "js")
+      (let ((web-mode-enable-part-face nil))
+        ad-do-it)
+    ad-do-it))
+
+;; Style-Gook
+(defun my-web-mode-hook ()
+  "Hooks for Web mode."
+  (setq web-mode-enable-auto-pairing t)
+  (setq web-mode-enable-css-colorization t)
+  (setq web-mode-enable-auto-expanding t)
+  (setq web-mode-enable-current-element-highlight t)
+  (setq web-mode-enable-current-column-highlight t)
+  )
+
+;; Emmet-Hook
+(add-hook 'web-mode-before-auto-complete-hooks
+          '(lambda ()
+             (let ((web-mode-cur-language
+                    (web-mode-language-at-pos)))
+               (if (string= web-mode-cur-language "css")
+                   (setq emmet-use-css-transform t)
+                 (setq emmet-use-css-transform nil)))))
+
+(add-hook 'web-mode-hook 'emmet-mode) ;; Auto-start on any markup modes
+(add-hook 'html-mode-hook 'emmet-mode) ;; Auto-start on any markup modes
+(add-hook 'web-mode-hook 'my-web-mode-hook)
+(add-hook 'web-mode-hook #'emmet-mode)
+(setq emmet-preview-default t)
+(add-hook 'web-mode-hook 'rainbow-mode)
+
+(provide 'setup-web-mode)
+;;; setup-web-mode.el ends here
diff --git a/.emacs.d.back/setup/setup-yaml-mode.el b/.emacs.d.back/setup/setup-yaml-mode.el
new file mode 100644
index 00000000..059c74e2
--- /dev/null
+++ b/.emacs.d.back/setup/setup-yaml-mode.el
@@ -0,0 +1,18 @@
+;;; setup-yaml-mode.el --- rogs default yaml mode configuration
+;;
+;;; Commentary:
+;;
+;; My default configuration for yaml mode
+;;
+;;; Code:
+
+(require 'yaml-mode)
+  (add-to-list 'auto-mode-alist '("\\.yml\\'" . yaml-mode))
+  (add-to-list 'auto-mode-alist '("\\.yaml\\'" . yaml-mode))
+
+(add-hook 'yaml-mode-hook
+      '(lambda ()
+        (define-key yaml-mode-map "\C-m" 'newline-and-indent)))
+
+(provide 'setup-yaml-mode)
+;;; setup-yaml-mode.el ends here
diff --git a/.emacs.d.back/snippets/js2-mode/chit.yasnippet b/.emacs.d.back/snippets/js2-mode/chit.yasnippet
new file mode 100644
index 00000000..23518452
--- /dev/null
+++ b/.emacs.d.back/snippets/js2-mode/chit.yasnippet
@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: Chai unit testing
+# key: chit
+# --
+
+  it('$1', (done) => {
+    chai.request(app).$2('$3')$4.end((err, res) => {
+      $5
+      done();
+    });
+  });
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/js2-mode/fnm.yasnippet b/.emacs.d.back/snippets/js2-mode/fnm.yasnippet
new file mode 100644
index 00000000..f1a279dd
--- /dev/null
+++ b/.emacs.d.back/snippets/js2-mode/fnm.yasnippet
@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: Express Middleware Function
+# key: fnm
+# --
+
+exports.$1 = (req, res, next) => {
+  $2
+};
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/js2-mode/fnr.yasnippet b/.emacs.d.back/snippets/js2-mode/fnr.yasnippet
new file mode 100644
index 00000000..24087d3c
--- /dev/null
+++ b/.emacs.d.back/snippets/js2-mode/fnr.yasnippet
@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: Express Request Function
+# key: fnr
+# --
+
+exports.$1 = (req, res) => {
+  $2
+};
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/rjsx-mode/rc.yasnippet b/.emacs.d.back/snippets/rjsx-mode/rc.yasnippet
new file mode 100644
index 00000000..945292bc
--- /dev/null
+++ b/.emacs.d.back/snippets/rjsx-mode/rc.yasnippet
@@ -0,0 +1,15 @@
+# -*- mode: snippet -*-
+# name: React component
+# key: rc
+# --
+import React from 'react';
+
+class $1 extends React.Component {
+  render() {
+    return (
+      $0
+    )
+  }
+}
+
+export default $1;
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/rjsx-mode/rsc.yasnippet b/.emacs.d.back/snippets/rjsx-mode/rsc.yasnippet
new file mode 100644
index 00000000..00dab777
--- /dev/null
+++ b/.emacs.d.back/snippets/rjsx-mode/rsc.yasnippet
@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: React stateless component
+# key: rsc
+# --
+import React from 'react';
+
+const $1 = () => (
+  $0
+)
+
+export default $1
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/web-mode/rcc.yasnippet b/.emacs.d.back/snippets/web-mode/rcc.yasnippet
new file mode 100644
index 00000000..16351182
--- /dev/null
+++ b/.emacs.d.back/snippets/web-mode/rcc.yasnippet
@@ -0,0 +1,14 @@
+# -*- mode: snippet -*-
+# name: React Class Component
+# key: rcc
+# --
+import React, { Component } from 'react';
+import $1 from 'react-native';
+
+class $2 extends Component {
+      render() {
+               $0
+      }
+}
+
+export default ${2:$(yas-text)};
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/web-mode/rcwm.yasnippet b/.emacs.d.back/snippets/web-mode/rcwm.yasnippet
new file mode 100644
index 00000000..b299683e
--- /dev/null
+++ b/.emacs.d.back/snippets/web-mode/rcwm.yasnippet
@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: React#componentWillMount
+# key: rcwm
+# --
+componentWillMount() {
+  $0
+}
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/web-mode/rfc.yasnippet b/.emacs.d.back/snippets/web-mode/rfc.yasnippet
new file mode 100644
index 00000000..5c633282
--- /dev/null
+++ b/.emacs.d.back/snippets/web-mode/rfc.yasnippet
@@ -0,0 +1,14 @@
+# -*- mode: snippet -*-
+# name: React Functional Component
+# key: rfc
+# --
+import React from 'react';
+import $1 from 'react-native';
+
+const $2 = ($3) => {
+      return (
+             $0
+      );
+};
+
+export default ${2:$(yas-text)};
diff --git a/.emacs.d.back/snippets/web-mode/rr.yasnippet b/.emacs.d.back/snippets/web-mode/rr.yasnippet
new file mode 100644
index 00000000..58d4e412
--- /dev/null
+++ b/.emacs.d.back/snippets/web-mode/rr.yasnippet
@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: React#render
+# key: rr
+# --
+render() {
+  $0
+}
\ No newline at end of file
diff --git a/.emacs.d.back/snippets/web-mode/rss.yasnippet b/.emacs.d.back/snippets/web-mode/rss.yasnippet
new file mode 100644
index 00000000..f7073a07
--- /dev/null
+++ b/.emacs.d.back/snippets/web-mode/rss.yasnippet
@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: React#setState
+# key: rss
+# --
+this.setState({$0});
\ No newline at end of file
diff --git a/.emacs.d.back/tramp b/.emacs.d.back/tramp
new file mode 100644
index 00000000..c3182470
--- /dev/null
+++ b/.emacs.d.back/tramp
@@ -0,0 +1,49 @@
+;; -*- emacs-lisp -*- <19/12/20 16:51:08 /home/roger/.emacs.d/tramp>
+;; Tramp connection history.  Don't change this file.
+;; You can delete it, forcing Tramp to reapply the checks.
+
+(((tramp-file-name "ssh" "root" nil "cloud.rogs.me" nil nil nil)
+  ("uname" "Linux 4.15.0-55-generic")
+  ("locale" "LC_ALL=en_US.utf8")
+  ("test" "test")
+  ("remote-path"
+   ("/bin" "/usr/bin" "/sbin" "/usr/sbin" "/usr/local/bin" "/usr/local/sbin"))
+  ("remote-shell" "/bin/sh")
+  ("~" "/root")
+  ("file-exists" "test -e")
+  ("stat" "env QUOTING_STYLE=locale \\stat")
+  ("id" "/usr/bin/id")
+  ("gid-integer" 0)
+  ("gid-string" "root")
+  ("case-insensitive" nil)
+  ("readlink" "\\readlink")
+  ("perl-file-spec" t)
+  ("perl-cwd-realpath" t)
+  ("perl" "\\perl")
+  ("git" "\\git")
+  ("uid-integer" 0))
+ ((tramp-file-name "ssh" "roger" nil "192.168.1.222" nil nil nil)
+  ("uname" "Linux 5.0.0-36-generic")
+  ("locale" "LC_ALL=en_US.utf8")
+  ("test" "test")
+  ("remote-path"
+   ("/bin" "/usr/bin" "/sbin" "/usr/sbin" "/usr/local/bin" "/usr/local/sbin"))
+  ("remote-shell" "/bin/sh")
+  ("~" "/home/roger")
+  ("file-exists" "test -e")
+  ("stat" "env QUOTING_STYLE=locale \\stat")
+  ("id" "/usr/bin/id")
+  ("gid-integer" 1000)
+  ("gid-string" "roger")
+  ("perl-file-spec" t)
+  ("perl-cwd-realpath" t)
+  ("perl" "\\perl")
+  ("case-insensitive" nil)
+  ("readlink" "\\readlink")
+  ("git" "\\git")
+  ("ls" "/bin/ls --color=never")
+  ("ls-quoting-style" t)
+  ("ls-dired" t)
+  ("uid-integer" 1000))
+ ((tramp-file-name "ssh" "ubuntu" nil "api-pincodes.destapp.com" nil nil nil)
+  nil))