在某些情况下，一个对象不适合或者不能直接引用另一个对象，而代理对象可以在客户端和目标对象之间起到中介的作用。
代理模式在日常生活中很常见，比如，你去杂货店买一个插座，而不是去生产插座的工厂去买。再比如，你去访问某个网站，你并没有访问权限，但你可以通过代理去访问这个网站，然后代理再把内容传给你。
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| from abc import ABCMeta, abstractmethod
class FemaleA():
def __init__(self, name):
self.name = name
class Male():
__metaclass__ = ABCMeta
@abstractmethod
def send_flower(self):
pass
@abstractmethod
def send_chocolate(self):
pass
@abstractmethod
def send_book(self):
pass
class MaleA(Male):
def __init__(self, name, love_female):
self.name = name
self.love_female = FemaleA(love_female)
def send_flower(self):
print('%s送花给%s' % (self.name, self.love_female.name))
def send_chocolate(self):
print('%s送巧克力给%s' % (self.name, self.love_female.name))
def send_book(self):
print('%s送书给%s' % (self.name, self.love_female.name))
class Proxy(Male):
def __init__(self, name, proxyed_name, love_female):
self.name = name
self.proxyed = MaleA(proxyed_name, love_female)
def send_flower(self):
self.proxyed.send_flower()
def send_chocolate(self):
self.proxyed.send_chocolate()
def send_book(self):
self.proxyed.send_book()
if __name__ == '__main__':
p = Proxy('男B', '男A', '女A')
p.send_book()
p.send_chocolate()
p.send_flower()
|