Thanks Jean-Paul Calderone. The following code worked for me.
from twisted.internet.endpoints import TCP4ClientEndpoint
from txsocksx.client import SOCKS5ClientEndpoint
if __name__ == "__main__":
chan = "django-hotclub"
chain_length = 5
myID = sys.argv[1]
counterpartID = sys.argv[2]
puttyEndPoint = TCP4ClientEndpoint(reactor, '127.0.0.1', 22)
ircEndpoint = SOCKS5ClientEndpoint('irc.freenode.net', 6667, puttyEndPoint)
d = ircEndpoint.connect(MomBotFactory('#' + chan, myID, counterpartID, chain_length, chattiness=0.05))
reactor.run()