class_decorator.py

class Authed:

    def __init__(self, func: typing.Callable[[str], None]):
        self.func = func
        self.checked_times = 0

    def __call__(self, arg: str):
        print('checking auth....OK')
        self.checked_times += 1
        if self.checked_times >= 5:
            print('run out of time')
        else:
            self.func(arg)
        print('post process....OK')

@Authed
def orig_func(arg1: str):
    print(f"arg1: {arg1}")

if __name__ == "__main__":
    orig_func("Hello World!")
    orig_func("test: Hello World!")
    orig_func("Hello World!")
    orig_func("test: Hello World!")
    orig_func("Hello World!")
    orig_func("test: Hello World!")