本文实例讲述了python常见的设计模式。分享给大家供大家参考，具体如下：
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# #!/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')
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希望本文所述对大家Python程序设计有所帮助。