Python實現代理模式

標籤：acl   else   pre   this   tps   pos   driver   def   class   

 

from abc import ABCMeta, abstractmethodNOT_IMPLEMENTED = "You should implement this."class AbstractCar:    __metaclass__ = ABCMeta    @abstractmethod    def drive(self):        raise NotImplementedError(NOT_IMPLEMENTED)class Car(AbstractCar):    def drive(self):        print("Car has been driven!")class Driver(object):    def __init__(self, age):        self.age = ageclass ProxyCar(AbstractCar):    def __init__(self, driver):        self.car = Car()        self.driver = driver    def drive(self):        if self.driver.age <= 16:            print("Sorry, the driver is too young to drive.")        else:            self.car.drive()driver = Driver(16)car = ProxyCar(driver)car.drive()driver = Driver(25)car = ProxyCar(driver)car.drive()

　　

摘自：wiki

 

Python實現代理模式