It’s a bit like using directories/folders to organise your work - you don’t have to have separate projects in separate folders but it really helps the more projects you have going on. Also once you have two Python projects that require different versions of the same dependency things will get messy.

Are you using a virtual env to isolate the environment of the game from the rest ofyour system? There are a few ways/tools to do it but maybe start here:

https://docs.python.org/3/library/venv.html