# 策略模式
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()
#坐飞机
travel = TravelInterface(AirplaneStrategy())
travel.travel()
#改开车
travel.set_strategy(CarStrategy())
travel.travel()
