[Twisted-Python] attribute error when I am trying to make one factory to send data to another

[Jessica Tsui]

I am working on this messaging app and I would like to pass data from one
factory to another. I have been referencing to other answers provided in
other similar questions by trying to add a variable storing the data from
one factory then initiate another factory and write the data to it.
Unfortunately there is an error when i call the other class, and I cannot
figure out why. Is there anything I can do to fix it? I have been stuck in
here for quite a while

this is the error:

 receivermessage = self.factory.app.handle_message2(data)
 exceptions.AttributeError: MultiEcho instance has no attribute 'factory'

Here is the code:


import kivyfrom kivy.app import Appfrom kivy.uix.label import
Labelfrom kivy.uix.scatter import Scatterfrom kivy.uix.boxlayout
import BoxLayoutfrom kivy.uix.scrollview import ScrollViewfrom
kivy.uix.button import Buttonfrom kivy.graphics.vertex_instructions
import Rectanglefrom kivy.graphics.context_instructions import
Colorfrom kivy.graphics.instructions import Instructionfrom kivy.base
import runTouchAppfrom kivy.lang import Builderimport socketfrom
kivy.core.window import Windowimport pygameimport randomfrom
kivy.support import install_twisted_reactor

install_twisted_reactor()from twisted.internet import reactor, protocol
Window.size = (550, 400)
# monitoring wordlistwith open("wordlist.txt") as word_file:
    wordlist = list(word.strip().lower() for word in word_file)
# protocols for senderclass EchoProtocol(protocol.Protocol):
    """This is just about the simplest possible protocol"""

    def dataReceived(self, data):
        "As soon as any data is received, write it back."
        sendermessage = self.factory.app.handle_message(data)
        if sendermessage:
            self.transport.write(data)

            #this line here is the trouble maker that caused the error

MultiEcho().dataReceived(sendermessage) class EchoFactory(protocol.Factory):
protocol = EchoProtocol def __init__(self, app): self.app = app # protocols
for receiver class MultiEcho(protocol.Protocol): def connectionMade(self):
self.factory.echoers.append(self) def dataReceived(self, data):
receivermessage = self.factory.app.handle_message2(data) if receivermessage:
self.transport.write(data)

            #this line here is the trouble maker that caused the error
            EchoProtocol().dataReceived(receivermessage)

class MultiEchoFactory(protocol.Factory):
    protocol = MultiEcho

    def __init__(self, app):
        self.echoers = []
        self.app = app

class ServerApp(App):
    def build(self):
        self.layout = BoxLayout(orientation='vertical', spacing=10)

        self.label = Button(text='Censoring process begin\nBeware of
keyword "umbrella"\n ', color=[1.0, 1.0, 1.0, 1.0])
        self.label.color = [0.9, 0.2, 0.2, 1.0]

        self.upperscroll = Button(pos_hint={'x': 0, 'center_y': .5},
size_hint=(None, None))

        self.scatter = Scatter()

        self.displaybox = Label()
        self.displaybox.color = [0.4, 0.9, 0.4, 1.0]

        reactor.listenTCP(8000, EchoFactory(self))  # for sender
        reactor.listenTCP(8001, MultiEchoFactory(self))  # for receiver

        self.layout.add_widget(self.label)
        self.layout.add_widget(self.scatter)

        self.scatter.add_widget(self.displaybox)

        return self.layout

    def handle_message(self, msg):

        if any(word in msg.lower() for word in wordlist):

            self.displaybox.color = [0.9, 0.4, 0.4, 1.0]
            self.displaybox.text = "content blocked"
            self.label.text += "Alert! Sender posts %s \n" % msg


        else:
            self.label.text += "Safe - sender posts %s \n" % msg
            self.displaybox.color = [0.4, 0.9, 0.4, 1.0]
            self.displaybox.text = "%s" % msg

        msg = msg

        return msg

    def handle_message2(self, msg):

        if any(word in msg.lower() for word in wordlist):
            self.label.color = [0.8, 0.8, 0.5, 1.0]
            self.label.text += "Alert! Receiver got %s \n" % msg
        else:
            self.label.color = [0.2, 0.2, 1.0, 1.0]
            self.label.text += "Safe - receiver sends %s \n" % msg

        msg = msg

        return msg

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