Mach-nix: Create python environments quick and easy

[FRidh]

@costrouc looked into this in the past

Allowing Multiple Versions of Same Python Package in PYTHONPATH

Allowing Multiple Versions of Python Package in PYTHONPATH/nixpkgs

TLDR; I wanted to get feedback on a potential feature that allows multiple versions of the same python package to be installed in the same PYTHONPATH . This is a general approach that is not specific to nixpkgs and could be used in other package managers. The only nix specific part is the tooling to allow for the building of these specialized packages. All of the materials/demo is in this repo GitHub - costrouc/python-multiple-versions. (Also posted in discuss.python.org Allowing Multiple Versio…