much simpler solution to `extreme-self-casting` about python-type-challenges

[laike9m]

Exactly 😃

Python-Type-Challenges/challenges/extreme-self-casting/solution2.py

Line 4 in c6ca3a1

Fn is a class decorator which takes a callable (`f`).

[laike9m]

The default solution is for Python < 3.12.

Though, not quite sure I totally get your point. If you mean to use solution2.py as the default solution, I'm fine with it (feel free to make a PR)

[asottile]

here's a python < 3.12 solution which also doesn't require annotating self:

spoilers

from typing import *

R = TypeVar('R')
P = ParamSpec('P')


class Fn(Generic[R, P]):
    def __init__(self, f: Callable[P, R]):
        self.f = f

    def transform_callable(self) -> Callable[Concatenate[object, P], R]:
        ...

[laike9m]

Yep, looks good to me.