user = user.split('!', 1)[0]
msgParts = msg.split(':')

if msg.startswith("!"):

    if user == 'Fox' or user == 'Josh':

        if msgParts[0].startswith("!join"):
            channel = msgParts[1]
            self.join(channel)

        elif msgParts[0].startswith("!leave"):
            channel = msgParts[1]
            msg = "Bye :("
            self.msg(channel, msg)
            time.sleep(1)
            self.part(channel)