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)