It's in the process of being migrated to a Python/Rust hybrid. Most of the backend is now rust-based: https://github.com/ankitects/anki/tree/master/rslib https:

It's in the process of being migrated to a Python/Rust hybrid. Most of the backend is now rust-based: https://github.com/ankitects/anki/tree/master/rslib https://github.com/ankitects/anki/tree/master/rslib