twisted and tkinter chat client

[Chris]

Hi,

Sorry for reposting but I changed my code and received a new error
message so I thought I would try it on the group again. I have a
working server and this is meant to be a chat client using tkinter that
connects to the server and sends messages. However I receive this error
message when I click the send button:

Traceback (most recent call last):
  File "C:\Python24\lib\lib-tk\Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "C:\Documents and Settings\chris\Desktop\Python\client.py", line
30, in sendMessage
    self.sendLine("Test")
AttributeError: ChatFactory instance has no attribute 'sendLine'

Any help really appreciated. Thanks to anyone who has already tried.

The code is here:
from twisted.internet import reactor
from twisted.internet.protocol import Protocol, ClientFactory
from twisted.protocols.basic import LineReceiver
from Tkinter import *
from twisted.internet import tksupport

class ChatClient(LineReceiver):

    def connectionMade(self):
        self.sendLine("Hello server")

    def lineReceived(self, line):
        print line

    def connectionLost(self, reason):
        pass


class ChatFactory(ClientFactory):

    protocol = ChatClient

    def clientConnectionFailed(self, connector, reason):
        reactor.stop()

    def clientConnectionLost(self, connector, reason):
        reactor.stop()

    def sendMessage(self):
        self.sendLine("Test")

chat = ChatFactory()
root = Tk()
b1 = Button(root,text="Send")
b1.configure(command=chat.sendMessage)
b1.pack()
tksupport.install(root)

reactor.connectTCP('localhost',8885,ChatFactory())
reactor.run()