class parent:
    _play = "打游戏"
    def __init__(self,name,sex):
        self.name = name
        self.sex = sex
    def study(self):
        print("人一生下来就会学习")
class son(parent):#继承 子类会继承父类的所有属性和方法
    def study1(self):
        print("儿子特别喜欢学习")
son1 = son("xx","男")
son1.study()#子类会继承父类的study
class parent:
    _play = "打游戏"
    def __init__(self,name,sex):
        self.name = name
        self.sex = sex
    def study(self):
        print("人一生下来就会学习")
class son(parent):#继承 子类会继承父类的所有属性和方法
    def study(self,str1,str2):#多态性
        print("儿子特别喜欢学习{},{}".format(str1,str2))
son1 = son("xx","男")
son1.study("打篮球","打羽毛球")