Taking the argument signature from a different function

Typing
6

I am not sure if this is what OP is talking about, but this is something I have also run across when trying to type hint alternate constructors:

class Parser:
    def __init__(self, grammar: str, *, option_1: int=..., option_2: str=..., option3: Literal[...] = ...):
        ....
   @classmethod
    def from_file(cls, grammar_path: PathLike | str, **kwargs) -> Self:
        return cls(open(grammar_path).read(), **kwargs)

How to tell the type checkers that kwargs should be the same as the keywords for __init__?

This is a slight special case where the *args part changes. But even when that doesn’t change: How to do this?