#encoding=utf-8 
# 
#by panda 
#桥接模式 
 
def printInfo(info): 
 print unicode(info, 'utf-8').encode('gbk') 
 
#抽象类：手机品牌 
class HandsetBrand(): 
 soft = None 
 def SetHandsetSoft(self, soft): 
 self.soft = soft 
 
 def Run(self): 
 pass 
 
#具体抽象类：手机品牌1 
class HandsetBrand1(HandsetBrand): 
 def Run(self): 
 printInfo('手机品牌1:') 
 self.soft.Run() 
 
#具体抽象类：手机品牌2 
class HandsetBrand2(HandsetBrand): 
 def Run(self): 
 printInfo('手机品牌2:') 
 self.soft.Run() 
 
 
#功能类：手机软件 
class HandsetSoft(): 
 def Run(self): 
 pass 
 
#具体功能类：游戏 
class HandsetGame(HandsetSoft): 
 def Run(self): 
 printInfo('运行手机游戏') 
 
#具体功能类：通讯录 
class HandsetAddressList(HandsetSoft): 
 def Run(self): 
 printInfo('运行手机通信录') 
 
def clientUI(): 
 h1 = HandsetBrand1() 
 h1.SetHandsetSoft(HandsetAddressList()) 
 h1.Run() 
 h1.SetHandsetSoft(HandsetGame()) 
 h1.Run() 
 
 h2 = HandsetBrand2() 
 h2.SetHandsetSoft(HandsetAddressList()) 
 h2.Run() 
 h2.SetHandsetSoft(HandsetGame()) 
 h2.Run() 
 return 
 
if __name__ == '__main__': 
 clientUI();

可以总结出类图是这样的：

所以，桥接模式的概念在于将系统抽象部分与它的实现部分分离，使它们可以地变化。
由于目标系统存在多个角度的分类，每一种分类都会有多种变化，那么就可以把多角度分离出来，让它们变化，减少它们之间的耦合。

下面我们再来看一个实例：

基本原理请参考相关书籍，这里直接给实例

假期旅游 从目的地角度可以分为 上海和大连，从方式角度可以分为跟团和独体

桥接模式把这两种分类连接起来可以进行选择。

类图：

# -*- coding: utf-8 -*-
#######################################################
# 
# tour.py
# Python implementation of the Class DaLian
# Generated by Enterprise Architect
# Created on: 11-十二月-2012 16:53:52
# 
#######################################################

from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from future_builtins import *
 

class TravelForm(object):
 """This class defines the interface for implementation classes.
 """
 def __init__(self, form="stay at home"):
 self.form=form
 pass

 def GetForm(self):
 return self.form
 pass
 pass

class Group(TravelForm):
 """This class implements the Implementor interface and defines its concrete
 implementation.
 """
 def __init__(self, form="by group"):
 super(Group,self).__init__(form) 
 pass
 pass

class Independent(TravelForm):
 """This class implements the Implementor interface and defines its concrete
 implementation.
 """
 def __init__(self, form="by myself"):
 super(Independent,self).__init__(form)
 pass

class Destination(object):
 """This class (a) defines the abstraction's interface, and (b) maintains a
 reference to an object of type Implementor.
 """
 m_TravelForm= TravelForm()

 def __init__(self, info):
 self.info=info
 pass

 def GetInfo(self):
 # imp->Operation();
 return print(self.info + " " +self.form.GetForm())
 pass

 def SetForm(self, form):
 self.form=form
 pass

class DaLian(Destination):
 """This class extends the interface defined by Abstraction.
 """
 def __init__(self, info="Go to DaLian "):
 super(DaLian,self).__init__(info)
 pass

class ShangHai(Destination):
 """This class extends the interface defined by Abstraction.
 """
 def __init__(self, info="Go to ShangHai"):
 super(ShangHai,self).__init__(info)
 pass
#客户端
if(__name__=="__main__"):
 
 destination=ShangHai()
 destination.SetForm(Group())
 destination.GetInfo()
 
 
 destination=DaLian()
 destination.SetForm(Independent())
 destination.GetInfo()

运行结果