{
  lib,
  python3,
}:

# This file contains an extra mapping from Julia packages to the Python packages they depend on.
rec {
  packageMapping = {
    ExcelFiles = [ "xlrd" ];
    PyPlot = [ "matplotlib" ];
    PythonPlot = [ "matplotlib" ];
    SymPy = [ "sympy" ];
  };

  getExtraPythonPackages =
    names:
    lib.concatMap (
      name:
      let
        allCandidates = if lib.hasAttr name packageMapping then lib.getAttr name packageMapping else [ ];
      in
      lib.filter (x: lib.hasAttr x python3.pkgs) allCandidates
    ) names;
}