Typing decorators which enrich a class

Hi

I would like to type a decorator which takes as input a class and returns the same class with added attributes, i.e., a subclass.
Example:

import typing

_T = typing.TypeVar("_T")


def config(*, /, prefix: str) -> typing.Callable[[typing.Type[_T], ???]:
    def wrap(cls: typing.Type[_T]) -> ???:
        class Subclass(cls):  # or could do cls.prefix = prefix instead of subclassing
            prefix: str = prefix

        return Subclass

    return wrap


@config(prefix="test")
class A:
    ...


print(A.prefix)

Been searching for an answer and experimenting for a few days now and can't find anything concrete. Any help would be much appreciated

Thank you

未指定文件、测试或入口点。首先查看当前关于类装饰器类型标注的指导，以及类型检查器对所示 config 和 wrap 签名的行为；完成的标准应是存在一种有文档记录且被接受的方法，在保留输入类类型的同时公开新增的 prefix 属性。