I use pyenv to switch between python versions (or just the `py` launcher when on windows), and pipenv will follow suit. It does require regeneration of the lock

I use pyenv to switch between python versions (or just the `py` launcher when on windows), and pipenv will follow suit. It does require regeneration of the lockfile for each python version/environment in the scenario you describe, but you can also keep them organized in a folder and swap them out for each environment. You're right that it doesn't come included in the tool though.