twisted：更新全局值后刷新数据

Question

我正在使用聊天应用程序，我希望服务器通过按下按钮来控制将数据刷新到客户端。我尝试通过更新全局变量来触发可以刷新数据的if语句。然而，即使全局变量更新，它仍然不会触发if语句，因为调试“打印”不起作用，我该如何解决？

这是代码

import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.scatter import Scatter
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.button import Button
from kivy.graphics.vertex_instructions import Rectangle
from kivy.graphics.context_instructions import Color
from kivy.graphics.instructions import Instruction
from kivy.base import runTouchApp
from kivy.lang import Builder
import socket
from kivy.core.window import Window
import pygame
import random
from kivy.support import install_twisted_reactor
install_twisted_reactor()
from twisted.internet import reactor, protocol, defer
from twisted.protocols.basic import LineReceiver
from twisted.internet.protocol import Protocol, Factory

censored = 0
class MultiClientEcho(protocol.Protocol):



    def __init__(self, factory, app):
        self.factory = factory
        self.app = app

    def connectionMade(self):
        self.factory.clients.append(self)

    def dataReceived(self, data):
        for client in self.factory.clients:
            storedmessage = self.factory.app.handle_message(data)

            global censored
            if censored ==1:
                print "send message"
                client.transport.write(storedmessage)


            elif censored ==2:
                print "banned message"
                client.transport.write("censored")


    def connectionLost(self,reason):
        self.factory.clients.remove(self)

class MultiClientEchoFactory(protocol.Factory):
    protocol = MultiClientEcho
    def __init__(self,app):
        self.clients = []
        self.app = app

    def buildProtocol(self, addr):
        return MultiClientEcho(self, self.app)

class ServerApp(App):
    def build(self):
        self.label = Label(text="server started\n")

        self.approve_btn = Button(text="approve")
        self.approve_btn.bind(on_release=self.send_message)
        self.banned_btn = Button(text="banned")
        self.banned_btn.bind(on_release=self.banned_message)
        self.layout = BoxLayout(orientation='vertical', spacing=10)

        reactor.listenTCP(8000, MultiClientEchoFactory(self))

        self.layout.add_widget(self.label)
        self.layout.add_widget(self.approve_btn)
        self.layout.add_widget(self.banned_btn)

        return self.layout

    def send_message(self, *args):
        global censored
        censored = 1
        self.label.text += "sent\n"
        print censored
        return censored

    def banned_message(self, *args):
        global censored

        censored = 2
        self.label.text += "censored\n"
        print censored
        return censored

    def handle_message(self, msg):
        self.label.text += "received:  %s\n" % msg
        return msg


if __name__ == '__main__':
    ServerApp().run()