This is exactly why you want to do all (as in 100%) of your python work in a virtual environment, so the packages are completely isolated in your ~/.virtualenvs

This is exactly why you want to do all (as in 100%) of your python work in a virtual environment, so the packages are completely isolated in your ~/.virtualenvs/[ENVNAME]/lib/pythonx.x/site-packages. Never, ever, do a pip install in your non virtualenv environment.