python: gpg module not importable with python 3.12

Describe the bug

The python statement import gpg fails with an ImportError or ModuleNotFoundError depending on python version and nixpgs channel.

Steps To Reproduce

I am building pkgs.python3.withPackages (p: [p.gpgme]) and then I execute python3 -c 'import gpg' from the result.

I do this for nixpkgs/nixos-24.05 and nixpkgs/nixos-unstable channel and for the python311 and the python312 derivation.

For example like this:

for nixpkgs in nixos-24.05 nixos-unstable; do
  for python in python311 python312; do
    echo Trying $python from $nixpkgs ...
    result=$(nix build -I nixpkgs=flake:nixpkgs/$nixpkgs --impure --print-out-paths \
      --expr '(import <nixpkgs> {}).'$python'.withPackages(p:[p.gpgme])')
    $result/bin/python3 -c 'import gpg'
  done
done

Results:

nixos-24.05 with python3.11: ok
nixos-24.05 with python3.12: ModuleNotFoundError: No module named 'imp'
nixos-unstable with python3.11: ImportError: cannot import name 'gpgme' from partially initialized module 'gpg' (most likely due to a circular import) (/nix/store/y6xyvx9x542x2knw440ajblqy9922q3q-python3-3.11.10-env/lib/python3.11/site-packages/gpg/__init__.py)
nixos-unstable with python3.12: ImportError: cannot import name 'gpgme' from partially initialized module 'gpg' (most likely due to a circular import) (/nix/store/ww0c5w89a905mzr45dqah77crc62rrsr-python3-3.12.7-env/lib/python3.12/site-packages/gpg/__init__.py)

Expected behavior

The module should be imported, no error message.

Additional context

On nixos-24.05 python3.11 is the default for the python3 derivation. On unstable it is 3.12.

Notify maintainers

@dotlambda

Metadata

system: "x86_64-linux"
host os: Linux 6.6.58, NixOS, 24.11 (Vicuna), 24.11.20241025.18536bf
multi-user?: yes
sandbox: yes
version: nix-env (Nix) 2.24.9
nixpkgs: /nix/store/wb6agba4kfsxpbnb5hzlq58vkjzvbsk6-source

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