Python 的多态笔记

Python的多态实际是通过instance 实现的

class Person:def __init__(self, name,age):self.name = nameself.age = agedef feed_pet(self,pet):#isinastance(obj,类)-->判断obj,是不是这个类的对象，或者判断obj是不是该类的子类的对象if isinstance(pet, Pet):self.pet = petprint('可以养')print(f'{self.name}喜欢喂养{pet.role},昵称是{pet.nickname}')else:print('不是宠物类型')class Pet:role='Pet'def __init__(self,nickname,age):self.nickname = nicknameself.age = agedef show(self):print(f'{self.nickname} 今年{self.age}岁了')class Cat(Pet):role='Cat'def catch_Mouse(self):print('抓老鼠')
class Dog(Pet):role='Dog'def Watch_House(self):print('看家高手。。。。')
class Tiger:def __init__(self,name):self.name = nameself.age = 1def eat(self):print('太可怕了，能吃人！！')#创建对象
cat=Cat('花花',2)
dog=Dog('大黄',3)
p1=Person('lucy',23)
tiger1=Tiger('大老虎')
p1.feed_pet(cat)
p2=Person('pengpeng',24)
p2.feed_pet(tiger1)
p2.feed_pet(dog)