(8)python教程：几行代码搞定python 设计模式

renyanping

#!/usr/bin/env python
# -*- coding:utf-8
class HttpBase:
def get(self):
psss
class Http1(HttpBase):
def get(self):
print 'http1'
class Http2(HttpBase):
def get(self):
print 'http2'

class Base:
def __init__(self):
self.httpobj = None
def http(self):
self.httpobj.get()
def compute(self):
self.http()
self.show()
#虚函数
def show(self):
pass
def notify(self, k):
print 'notify', k

#桥接模式，通过A，B 关联不同的http1和http2
class BaseA(Base):
def __init__(self):
self.httpobj = Http1()        
def notify(self, k):
print 'A notify', k     
def show(self):
print 'show a'
class BaseB(Base):
def __init__(self):
self.httpobj = Http2()
def notify(self, k):
print 'B notify', k
def show(self):
print 'show b'
#观测者模式
class Observer:
def __init__(self):
self.listOB = []
def register(self, obj):
self.listOB.append(obj)
def notify(self):
for obj in self.listOB:
obj.notify(len(self.listOB))
#适配器模式
class B1:
def http(self):
BaseB().http()
#工厂模式
class Factory:
def CreateA(self):
return BaseA()
def CreateB(self):
return BaseB()

#单例模式
class Logger(object):
log = None
@staticmethod
def new():
import threading
#线程安全
mylock = threading.RLock()
mylock.acquire()
if not Logger.log:
Logger.log = Logger()
mylock.release()
return Logger.log
def write(self, v):
print 'Logger ', v
if __name__ == "__main__":
a = Factory().CreateA()
b = Factory().CreateB()
objS = Observer()
objS.register(a)
objS.register(b)
a.compute()
b.compute()
objS.notify()
b1 = B1()
b1.http()
Logger.new().log.write('v')

　　


其他参考：
(1)python教程:hello world
(2)python教程:数据类型和运算规则
(3)python教程:元组，列表，词典
(4)python教程:分支、循环
(5)python教程:函数
(6)python教程:class
(8)python教程：几行代码搞定python 设计模式