I'm using the type annotations from `typing` in a Python 3.5 project I'm working on, but only as a form of documentation. Unfortunately mypy doesn't work for me

I'm using the type annotations from `typing` in a Python 3.5 project I'm working on, but only as a form of documentation. Unfortunately mypy doesn't work for me – the project heavily uses a namedtuple-style sum type library, and I haven't found a way to make the types it generates work with mypy. (iirc mypy has builtin support for namedtuple, but doesn't really support other types generated at runtime)