针对上一篇文章中的代码，想出的重构方案（python实现）

#!/usr/bin/env python

class Processor:
def __init__(self, processor):
self.processor = processor

def isAllowSend(self, message, setChargeFlag):
pass

class WhildListProcessor(Processor):
def isAllowSend(self, message, setChargeFlag):
if message.sender in (1,2):
return True

if self.processor != None:
return self.isAllowSend(message, setChargeFlag)

class DateProcessor(Processor):
def isAllowSend(self, message, setChargeFlag):
if message.date > "20130101":
return False

if self.processor != None:
return self.isAllowSend(message, setChargeFlag)

class DefaltProcessor:
def isAllowSend(self, message, setChargeFlag):
setChargeFlag(message)
return True

def getProcessor():
return WhildListProcessor(DefaltProcessor(None))

class Message:
def __init__(self, sender, ):
self.sender   = sender
self.isSend   = False
self.isCharge = False

def setChargeFlag(message):
message.isCharge = True

def setSendFlag(message):
message.isSend = True

def run(self):
message = Message(10)
processor = getProcessor()
if (processor.isAllowSend(message, setChargeFlag)):
setSendFlag(message)