Python不带参数的类装饰器

# -*- coding: utf-8 -*-
# author：baoshan
# 不带参数的类装饰器
# 类装饰器的实现，必须实现__call__和__init__两个内置函数。
# __init__：接收被装饰函数；__call__：实现装饰逻辑


class logger(object):
    def __init__(self, func):
        self.func = func

    def __call__(self, *args, **kwargs):
        print(‘[INFO]: the function {func}() is running...‘.format(func=self.func.__name__))
        return self.func(*args, **kwargs)


@logger
def say(something):
    print("say ‘{}!‘".format(something))


say("I am using class decorator")

[INFO]: the function say() is running...
say ‘I am using class decorator!‘