Help users by adding type annotations / type stubs for mypy

[MartinThoma]

Hiho :-)

What do you think about adding type annotations / type stubs so that users can check their code better with mypy?

If you want to read more about it, I've written an article about type annotations in mypy. Let me know if you have questions about it.

As Python 3.5 is the oldest version you support, adding type annotations to function signatures would work: https://docs.python.org/3.5/library/typing.html

[ad-m]

I am in favor of adding typing as long as it does not break backwards compatibility. I also see no problem that backward compatibility requires automated transpilation before release.

However - as a maintaner - I do not see the project's own resources to make such changes. Note that I am currently not experienced with types in Python.

If you create a pull request - we can gradually work on its release.

[michael-k]

I don't have a clear opinion. I like type annotations and use them everywhere else but

• Django itself rejected a DEP (First draft of DEP for static-ish typechecking for Django django/deps#65) regarding type annotations for now: https://groups.google.com/d/topic/django-developers/C_Phs05kL1Q/discussion.
• django-stubs hasn't figured out how to support multiple versions of Django: Proposal: versioning policy typeddjango/django-stubs#262