Writing a parser is not that much of work to buy a company in order to do it. Piggybacking on LSP servers and treesitter would be more efficient.
Writing something that understands all the methods that come in a Django model goes way beyond parsing the code, and is a genuine struggle in language where you can’t execute the code without worrying about side effects like Python.
Ty should give them a base for that where the model is able to see things that aren’t literally in the code and aren’t in the training data (eg an internal version of something like SQLAlchemy).
E.g. mypy has a plugin to read the methods and return types of SQLAlchemy records, I believe without actually executing them.
Obviously not globally true, but in limited domains/scenarios you can see what would exist without actually executing the code.