1. 手写代码，不带参数

class Test(object):
    def __init__(self, func):
        print("初始化")
        print("func name is %s" % func.__name__)
        self.__func = func

    def __call__(self, *args, **kwargs):
        print("————————装饰器中的功能-——————-")
        self.__func()

@Test
def test():
    print("______test______")

test()

1.1 打印结果

C:\Users\HuJun\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/HuJun/PycharmProjects/pythonProject/daily_tesy/类装饰器.py
初始化
func name is test
————————装饰器中的功能-——————-
______test______

Process finished with exit code 0

2. 类装饰器，装饰器带参数

class Test(object):
    def __init__(self, nums):
        print("-----init------")
        self.nums = nums

    def __call__(self, func):
        print("-----call------")
        self.__func = func
        return self.call_old_func

    def call_old_func(self):
        print("-----开始调用装饰器------")
        self.__func()
        print("-----结束调用装饰器------")


@Test(100)
def test():
    print("-----test------")

test()

2.1 打印结果

C:\Users\HuJun\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/HuJun/PycharmProjects/pythonProject/daily_tesy/类装饰器2.py
-----init------
-----call------
-----开始调用装饰器------
-----test------
-----结束调用装饰器------

Process finished with exit code 0