（三）python 设计模式 --- 策略模式

2023年11月15日 176次阅读 来源: AngelovLee
1. 根据需求，通过实现模板接口对象，将其注入实现策略模式
# -*- coding: utf-8 -*-

######################
# 策略模式 模板接口 #
######################


class TravelStrategy(object):
    ''' 出行策略 '''

    def travelAlgorithm(self):
        pass

class AirplaneStrategy(TravelStrategy):
    def travelAlgorithm(self):
        print("坐飞机出行....")

class TrainStrategy(TravelStrategy):
    def travelAlgorithm(self):
        print("坐高铁出行....")


class CarStrategy(TravelStrategy):
    def travelAlgorithm(self):
        print("自驾出行....")

class BicycleStrategy(TravelStrategy):
    def travelAlgorithm(self):
        print("骑车出行....")


class TravelInterface(object):
    def __init__(self,travel_strategy):
        self.travel_strategy = travel_strategy

    def set_strategy(self,travel_strategy):
        self.travel_strategy = travel_strategy

    def travel(self):
        return self.travel_strategy.travelAlgorithm()

if __name__ == '__main__':
    #坐飞机
    travel = TravelInterface(AirplaneStrategy())
    travel.travel()

    #改开车
    travel.set_strategy(CarStrategy())
    travel.travel()
2.根据需求外链接口，实现策略模式
#_*_coding:utf-8_*_
import types

##################################
# 策略模式 外链接口（类外方法注入） #
##################################

class StrategyExample:
    def __init__(self, func=None):
        self.name = 'Strategy Example 0'
        if func is not None:
            self.execute = types.MethodType(func, self)

    def execute(self):
        print(self.name)


def execute_replacement1(self):
    print(self.name + ' from execute 1')


def execute_replacement2(self):
    print(self.name + ' from execute 2')
    原文作者：AngelovLee
    原文地址: https://blog.csdn.net/ChangerJJLee/article/details/80891395
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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