class Dog(object):
    def __init__(self,name):
        self.name = name
    def game(self):
        print("%s蹦蹦跳跳的玩耍。。。"%self.name)


class XiaoTianQuan(Dog):
    def game(self):
        print("%s飞到天上去玩耍"%self.name)\


class Person(object):
    def __init__(self,name):
        self.name = name 
    def game_with_dogs(self,dog):
        print("%s和%s快乐的玩耍。。。"%(self.name,dog.name))
        # 让狗玩耍
        dog.game()
  
wangcai = Dog("旺财")
xiaoming = Person("小明")
xiaoming.game_with_dogs(wangcai)
wangcao = XiaoTianQuan("哮天犬")
xiaoming.game_with_dogs(wangcao)

运行结果：

小明和旺财快乐的玩耍。。。
旺财蹦蹦跳跳的玩耍。。。


小明和哮天犬快乐的玩耍。。。
哮天犬飞到天上去玩耍