brew and then
brew install python brew install python3
pip install flask
python -c 'import flask'
But I got exception
ImportError: No module named flask
Set and export
So far so good. But when I tried to install a package with
pip3 for Python 3, I got error message
Your PYTHONPATH points to a site-packages dir for Python 2.x but you are running Python 3.x! PYTHONPATH is currently: ":/usr/local/lib/python2.7/site-packages" You should `unset PYTHONPATH` to fix this.
How to use site-packages without the
PYTHONPATH trick to make both
pip3 usable and both Python 2 and Python 3 able to import site-packages?