# #!/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')