I use Nix shells & derivations to manage python versions and dependencies. The obvious disadvantage is needing to learn Nix, but the advantage is one system can

I use Nix shells & derivations to manage python versions and dependencies. The obvious disadvantage is needing to learn Nix, but the advantage is one system can track all the project's dependencies, not just the Python ones (e.g. you can also track the dependencies of Python modules written in other languages like Numpy).