Python多态的核心机制与实战应用解析

#多态的代码实例
class Farther:
	def behavior(self,action):
		print("父亲会%s" % action)
# 定义Son类继承Farther类
class Son(Farther):
	def behavior(self,action):
		print("儿子会%s" % action)
# 定义Grandson类继承Farther类
class Grandson(Farther):
	def behavior(self,action):
		print("孙子会%s" % action)
# 使用Farter类创建对象
# 程序在执行时才会确定behavior方法是属于哪一个对象的
f = Farther()
print(id(f))
f.behavior("吃饭")   #父亲会吃饭
f = Son()
print(id(f))
f.behavior("吃饭")   #儿子会吃饭
f = Grandson()
print(id(f))
f.behavior("吃饭")   #孙子会吃饭

# 多态的应用
class IceCream:
    def make_icecream(self,taste):
        print("寻找不同口味的冰淇淋...")
        taste.make(self)
# 定义抹茶味的冰淇淋和方法
class Tea:
    def make(self,make_icecream):
        print('%s 正在调用抹茶的制作方法' % make_icecream)
class Orange:
    def make(self,make_icecream):
        print('%s 正在调用抹茶的制作方法' % make_icecream)
class Apple:
    def make(self,make_icecream):
        print('%s 正在调用抹茶的制作方法' % make_icecream)
i = IceCream()
# 抹茶味
i.make_icecream(Tea())
# 橘子味
i.make_icecream(Orange())
#苹果味
i.make_icecream(Apple())

class Wechatpay:
    def __init__(self, name, money):
        self.name = name
        self.money = money
     def pay(self):
        print('%s通过微信支付了%s元' % (self.name, self.money))
class Alipay:
    def __init__(self, name, money):
        self.name = name
        self.money = money 
    def pay(self):
        print('%s通过支付宝支付了%s元' % (self.name, self.money))
 #这里的多态性体现是向同一个函数，传递不同参数后，可以实现不同功能.
def pay(person):  
    person.pay()
# 实列化对象
ali = Alipay("xiaoming", 100)
wch = Alipay("xiaohong", 100)
pay(ali)
pay(wch)