docs/packages/nixpkgs-manual/python-interp-table.nix

{
  pkgs ? (
    import ../.. {
      config = { };
      overlays = [ ];
    }
  ),
}:
let
  lib = pkgs.lib;
  inherit (lib.attrsets) attrNames filterAttrs;
  inherit (lib.lists)
    filter
    map
    naturalSort
    reverseList
    ;

  isPythonInterpreter =
    name:
    /*
      NB: Package names that don't follow the regular expression:
      - `python-cosmopolitan` is not part of `pkgs.pythonInterpreters`.
      - `_prebuilt` interpreters are used for bootstrapping internally.
      - `python3Minimal` contains python packages, left behind conservatively.
      - `rustpython` lacks `pythonVersion` and `implementation`.
    */
    (lib.strings.match "(pypy|python)([[:digit:]]*)" name) != null;

  interpreterName =
    pname:
    let
      cuteName = {
        cpython = "CPython";
        pypy = "PyPy";
      };
      interpreter = pkgs.${pname};
    in
    "${cuteName.${interpreter.implementation}} ${interpreter.pythonVersion}";

  interpreters = reverseList (
    naturalSort (filter isPythonInterpreter (attrNames pkgs.pythonInterpreters))
  );

  aliases =
    pname:
    attrNames (
      filterAttrs (
        name: _: isPythonInterpreter name && name != pname && interpreterName name == interpreterName pname
      ) pkgs
    );

  result = map (pname: {
    inherit pname;
    aliases = aliases pname;
    interpreter = interpreterName pname;
  }) interpreters;

  toMarkdown =
    data:
    let
      line = package: ''
        | ${package.pname} | ${join ", " package.aliases or [ ]} | ${package.interpreter} |
      '';
    in
    join "" (map line data);

  join = lib.strings.concatStringsSep;

in
''
  | Package | Aliases | Interpeter |
  |---------|---------|------------|
  ${toMarkdown result}
''