python版本的策略模式

# -*- coding:UTF-8 -*-
import abc

class Strategy(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def algorithm_interface(self):
        pass

class ConcreteStrategyA(Strategy):
    def algorithm_interface(self):
        print(‘算法A实现‘)

class ConcreteStrategyB(Strategy):
    def algorithm_interface(self):
        print(‘算法B实现‘)

class ConcreteStrategyC(Strategy):
    def algorithm_interface(self):
        print(‘算法C实现‘)

class Context:
    def __init__(self,strategy):
        self.strategy=strategy

    def context_interface(self):
        self.strategy.algorithm_interface()

if __name__=="__main__":
    context = Context(ConcreteStrategyA())
    context.context_interface()
    context = Context(ConcreteStrategyB())
    context.context_interface()
    context = Context(ConcreteStrategyC())
    context.context_interface()

原文地址：https://www.cnblogs.com/gjinwei/p/8351135.html