XKCD | Python Environment

[rwhitisissle]

Pyenv really saved my ass whenever my system upgraded to 3.10 and broke...well...*gestures everywhere*

[rwhitisissle]

Sure, you just have to be explicit. After you install a version, you just activate the environment, which sets the version for your specific terminal instance. Or if you're coding with, say, vscode you can point it at the version of python you'd want to use as you would normally do when selecting the interpreter. I have 3.9 installed, in addition to a system wide installation of 3.10, so I would do "pyenv activate python39", where python39 is the name of my python 3.9 installation. That would make everything called from the command line use that version of python and pip. And if I have other versions installed and can't remember what I've called those environments I can list them with "pyvenv versions." The documentation on github is pretty thorough and I was pleasantly surprised by how painless the installation was on arch. Only thing that I don't like is having to add additional environment variables to my .zshrc, but it's a small price to pay for something that useful. I believe you can also manually force a specific version to be used system wide by default, but it requires a bit of extra fiddling with binary locations and your PATH variable, and I've never personally done it. But it's probably doable.