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)