For thoses who need type hint, this code works with pyright

class staticproperty(Generic[GetterReturnType]):

    def __init__(self, func: Callable[..., GetterReturnType]):
        if isinstance(func, staticmethod):
            fget = func
        else:
            fget = staticmethod(func)
        self.fget = fget

    def __get__(self, obj, klass=None) -> GetterReturnType:
        if klass is None:
            klass = type(obj)
        return self.fget.__get__(obj, klass)()