创建型模式-工厂方法模式

 

 

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from abc import ABCMeta,abstractmethod   class Payment(metaclass=ABCMeta):     # abstract class     @abstractmethod     def pay(self, money):         pass   class Alipay(Payment):     def __init__(self, use_huabei=False):         self.use_huabei = use_huabei     def pay(self, money):         if self.use_huabei:             print("花呗支付%d元。"%money)         else:             print("支付宝余额支付%d元。"%money)   class WechatPay(Payment):     def pay(self, money):         print("微信支付%d元。"%money)   class BankPay(Payment):     def pay(self, money):         print("银行卡支付%d元。"%money)          class PaymentFactory(metaclass=ABCMeta):     @abstractmethod     def create_payment(self):         pass   class AlipayFactory(PaymentFactory):     def create_payment(self):         return Alipay()   class WechatPayFactory(PaymentFactory):     def create_payment(self):         return WechatPay()   class HuabeiFactory(PaymentFactory):     def create_payment(self):         return Alipay(use_huabei=True)   class BankPayFactory(PaymentFactory):     def create_payment(self):         return BankPay()       #client pf = HuabeiFactory() p = pf.create_payment() p.pay(100)