装饰器修改实例参数

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print(args)
        if args[0].cache:
            print("GET CACHE ====> ", args[0].cache)
        args[0].cache = "cache"
        return func(*args, **kwargs)

    return wrapper


class MyClass:
    def __init__(self):
        self.cache = ""

    @my_decorator
    def my_run(self):
        pass


if __name__ == '__main__':
    demo = MyClass()
    demo.my_run()
    demo.my_run()