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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
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