类和面向对象

定义一个基类

class Persion(object):
    def __init__(self, name):
        self.name=name
    def aa(fn):
        def new(*args,**kwargs):
            print('这一行用于判断')
            fn(*args,**kwargs)
            print('这一行是日志')
        return new
    @aa
    def say(self,address):
        print(self.name,address)

派生子类

class BlackPersion(Persion):
    def __init__(self, name):
        super().__init__(name)
    @Persion.aa
    def newfn(self):
        print(self.name)

b=BlackPersion('zhansan')
b.say('fz')
b.newfn()