# -*- coding:utf-8 -*-class Alipay():    def __init__(self,money):        self.money = money    def pay(self):        print('使用阿里支付了%s' % self.money)class Jdpay():    def __init__(self,money):        self.money = money    def pay(self):        print('使用京东支付了%s' % self.money)def pay(obj): # 定义一个函数，统一调用接口    obj.pay()a1 = Alipay(200)j1 = Jdpay(100)pay(a1)pay(j1)