Fixing Python module (pip install) installation problems

I ran into Python installation issues enough times to feel like writing about it, hopefully so someone else can solve theirs.

One issue that comes up pretty frequently when you have multiple versions of Python on one computer is the following:

You type “pip install” to install a new package:

You get “Requirement already satisfied”, informing you it’s already installed:

And yet when you run your Python code, you get ModuleNotFoundError: No module named…