I am wondering if this will work with newer python version where you can pass list instead of List as a valid type hint ?

what Python version are u referring to?

in python 3.9 you can do

class A:
   b: list[inŧ]

instead of

class A:
   b: List[int]

I am almost sure they have maintain compatibility with older version but the fact that we are using a private object from the typing library tell me that we are not 100% sure we will support this new way.

Maybe there is a way not to use the _GenericAlias since it is private ?

Oh actually we can use

from typing_inspect import is_generic_type

we already rely on this library for some type hint things and they make sure that their function are compatible with every python version

https://github.com/ilevkivskyi/typing_inspect

can u propose a PR on top of mine to do this? I am not sure what u are intending to tell. I did trial and error until I found the working formula

I pushed a commit