Mypy error on structure

[gleb-chipiga]

• cattrs version: 1.1.2
• Python version: 3.8.6
• Operating System: Linux x86-64

Description

Run mypy on first example from readme and get error.

What I Did

import cattr
from typing import Tuple

cattr.structure([1.0, 2, "3"], Tuple[int, int, int])

$ mypy example.py
example.py:4: error: Argument 2 has incompatible type "object"; expected "Type[<nothing>]"
Found 1 error in 1 file (checked 1 source file)

[Tinche]

Ah, I need to tweak the type annotation (turns out Type[C] basically only works for classes, not abstract types like Tuple or Optional). Will do in the next couple of days.

[Tinche]

Note that I have to change this type annotation to Any, since there's no better way to type check this atm.

[Tinche]

I actually needed to add some overloads. There's no way to correctly check cattr.structure([1.0, 2, "3"], Tuple[int, int, int]) with current Mypy as far as I'm aware. So in those cases you will have to suppress the error in any case.

[Tinche]

We're waiting on this: https://github.com/python/mypy/issues/9773