14.Python3多态

"""
运行时，调用不同类实例化的对象下的相同方法，实现的过程不一样
得到不同的结果
mylist.__len__()
mystring.__len__()

"""

class H2O:
    def __init__(self,name,temp):
        self.name = name
        self.temp = temp

    def turn_ice(self):
        if self.temp<0:
            print("[%s]水结成冰咯"%self.name)
        elif self.temp>=0 and self.temp<100:
            print("[%s]冰融化成水咯"%self.name)
        elif self.temp>=100:
            print("[%s]水蒸发咯"%self.name)


class Ice(H2O):
    pass

class Water(H2O):
    pass

class Steam(H2O):
    pass



def turn_ice(obj):
    obj.turn_ice()


ice   = Ice("冰",-40)
water = Water("水",40)
steam = Steam("水蒸气",100000)


turn_ice(ice)
turn_ice(water)
turn_ice(steam)