gistfile1.py

import gevent
from gevent import queue, socket

class Tcp(object):
    def __init__(self, settings):
        self.host = settings['host']
        self.port = settings['port']
        self.recv_queue = queue.Queue()
        self.send_queue = queue.Queue()
        self.socket = socket.socket()

    def connect(self):
        self.socket.connect((self.host, self.port))
        try:
            jobs = [gevent.spawn(self.recv_loop), gevent.spawn(self.send_loop)]
            gevent.joinall(jobs)
        finally:
            gevent.killall(jobs)

    def disconnect(self):
        self.socket.close()

    def recv_loop(self):
        while True:
            data = self.socket.recv(4096)
            for line in data.splitlines():
                self.recv_queue.put(line)

    def send_loop(self):
        while True:
            line = self.send_queue.get()
            self.socket.send(line)

class Bot(Tcp):
    def __init__(self, settings):
        self.channels = settings['channels']
        self.nick = settings['nick']
        self.connection = Tcp(settings)
        self.connect()
        self.loop()

    def connect(self):
        gevent.spawn(self.connection.connect)
        self.send('NICK', self.nick)
        self.send('USER', self.nick, '3', '*', self.nick)
        for channel in self.channels:
            self.send('JOIN', channel)

    def send(self, *args):
        self.connection.send_queue.put(' '.join(args) + '\r\n')

    def loop(self):
        while True:
            line = self.connection.recv_queue.get()
            print line

SETTINGS = {
    'host': 'irc.oftc.net',
    'port': 6667,
    'nick': 'botler',
    'channels': ['#bots'],
}

if __name__ == '__main__':
    jobs = [gevent.spawn(lambda: Bot(SETTINGS))]
    gevent.joinall(jobs)

Why use inheritance?