On Sun, Nov 6, 2016 at 3:03 PM, Jon Ribbens <jon+use...@unequivocal.eu> wrote: > I don't suppose anyone else more constructive and informed actually > knows the answer to my rather simple question of how Python knows > it's in a venv? ;-)
Two ways. 1) Normally, you 'activate' the venv by sourcing a script into your shell. This modifies $PATH, $PYTHONHOME, and I think a couple of other environment variables. 2) If Python notices that its executable comes from a venv, it uses it. (I wasn't aware of #2 until this thread.) Generally, you type "python" or "python3" and the shell searches $PATH. If you have a venv active, it'll find the one there before it finds the system one. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
