When I use pip
under Linux I get:
ModuleNotFoundError: No module named 'pip._vendor.urllib3'
$ pip3 -V
...
ModuleNotFoundError: No module named 'pip._vendor.urllib3'
My /usr/bin/pip3 :
#!/usr/bin/python3
# GENERATED BY DEBIAN
import sys
# Run the main entry point, similarly to how setuptools does it, but because
# we didn't install the actual entry point from setup.py, don't use the
# pkg_resources API.
from pip import __main__
if __name__ == '__main__':
sys.exit(__main__._main())