#面向对象3大特性：封装，多态，继承

# 继承可节省内存，减少代码

class People():

    def __init__(self,name,age):

        self.Name=name

        self.Age=age

    def eat(self):

        print('%s is eating'%self.Name)

    def talk(self):

        print('%s is talking'%self.Name)

    def sleep(self):

        print('%s is sleeping'%self.Name)

class bianxinren(People):#继承

    pass#可以什么也不做，之继承

m1=bianxinren('变性人','20')

m1.eat()

class Man(People):#继承

    def piao(self):

        print('%s is piaoing...20s...done'%self.Name)

    def sleep(self):#给父类方法增加新功能

        People.sleep(self)

        print('%s 睡的时间长'%self.Name)

m2=Man('男人','20')

m2.piao()

m2.sleep()

class Woman(People):

    def born(self):

        print('%s is born a baby'%self.Name)

m3=Woman('女人','25')

m3.born()

# m3.piao()不能执行，是别的子类的方法