bot.py

from twisted.application.service import Service
from twisted.protocols.basic import LineReceiver
from twisted.python import log
from twisted.internet.protocol import ClientCreator
from twisted.internet import reactor

class MyProtocol(LineReceiver):
    def lineReceived(self, line):
        # process bot command
        log.msg("recv:", line)

    def disconnect(self):
        if self.transport:
            self.transport.loseConnection()

class MyService(Service):
    def __init__():
        self._client = None

    def startService():
        d = ClientCreator(reactor, MyProtocol).connectTCP(HOST, PORT)
        d.addCallback(gotClient)
        d.addErrback(log.err)

    def stopService():
        # clean up
        if self._client:
            self._client.disconnect

    def gotClient(self, prot):
        # keep client reference
    	  self._client = prot

    def sendMessage(self, message):
        # send a message to the server; call from web interface
        if self._client:
            self._client.sendLine(message)
            return True
        return False