Hello, At first I want to say, that I'm pretty new to Twisted and these classes get me lost (functional programming veteran :-)). Anyway, I started OOP month ago, and I need to write UDP Multicast client/server. What it's for? I want to write Gtk clone of Vypress Chat - serverless chat application. Erm, in fact I want to rewrite it, because I started writing it in Perl :-) So... I looked up API for Multicast and this got my eye: http://twistedmatrix.com/documents/current/api/twisted.internet.udp.Multicas... It's probably right thing. But as I never done this before, I need an example.. I think my code should start like this: #!/usr/bin/env python # -*- coding: utf-8 -*- from twisted.internet.udp import MulticastPort from twisted.internet import reactor class VyChat(DatagramProtocol): But what's next? Anyway, any help or examples appreciated.