Generic ParamSpec in subclass definitions

Given some base class that is generic over a param-spec, I'd like to be able to define the param-spec using a subclass method implementation. Something like:

T = TypeVar("T")
P = ParamSpec("P")

class Base(Generic[P, T]):
    func: Callable[P, T]
    # for instance
    def wrapper(self, *args: P.args, **kwargs: P.kwargs) -> Tuple[T]:
        return (self.func(*args, **kwargs), )
        
class Subclass(Base):
    def func(self, x: int, *, y: str) -> bytes: ...

That is, the base class is generic over some function definition, and the subclass implement that function as a method. I'm not sure how common this pattern is, but I see it a fair amount when the class gets more complicated and you can't just use a decorator (e.g. torch.nn.Module.forward is a big example of this). Is there some other way of specifying "infer the parameters from this method implementation"? Is this something that would require an update to the specification, is it "just" a feature request to the method implementation "like" an assignment statement?

No se nombra ningún archivo, prueba ni punto de entrada de implementación. Empieza revisando el ejemplo de ParamSpec, Generic y método de subclase del issue junto con la especificación de tipado de Python; determina si la inferencia solicitada está soportada o requiere un cambio en la especificación. Se considera terminado cuando el comportamiento y el alcance de su implementación estén decididos explícitamente.