Cythonized class lacks type annotations

[athre0z]

from typing import get_type_hints

class Kitteh:
    attr: float = 123.

print(get_type_hints(Kitteh))

This pure Python code results in different outputs depending on whether it has been cythonized or not.

# Cythonized
$ python -mtestx
{}

# Pure
$ rm testx/*.c testx/*.so
$ python -mtestx
{'attr': <class 'float'>}

This is unfortunate for use cases where you e.g. want to perform data parsing into classes based on type hints. Is this intended behavior? I observed this with both 0.29.6 and the latest master.

I attached a small pipenv project that reproduces the issue.

cythonbug.tar.gz

[scoder]

Duplicate of #2552.