类装饰器

# 类装饰器之：加在类上的装饰器
# def auth(func):
#     def inner(*args, **kwargs):
#         print("我要开始了")
#         res = func(*args, **kwargs)
#         res.name='lqz'
#         return res
#
#     return inner
#
#
# @auth  # Person=auth(Person)  # 加在类上的装饰器
# class Person():
#     pass
#
# p=Person()
# print(p.name)


# 类装饰器之：装饰器是类
class Auth():
    def __init__(self, func):
        self.func = func

    def __call__(self, a, b):
        print('我要开始加了')
        res = self.func(a, b)
        return res


@Auth  # add=Auth(add)
def add(a, b):  # add 是Auth的对象
    return a + b


res=add(4,5)  # add加括号，会触发Auth的__call__
print(res)