From Wikipedia
Twisted is an event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects variously support TCP, UDP, SSL/TLS, IP Multicast, Unix domain sockets, a large number of protocols (including HTTP, XMPP, NNTP, IMAP, SSH, IRC, FTP, and others), and much more. Twisted is based on the event-driven programming paradigm, which means that users of Twisted write short callbacks which are called by the framework.
Home Page of the project.
Program:
Please install what you need to run twisted on your machine before the workshop, and fill this wiki section to let us know about the issues you might have found while installing.
Install python, beautifulsoup and nevow using the adhoc installers
http://www.python.org/download/
The very simple way (probably OK)
sudo apt-get install python-twisted python-beautifulsoup python-nevow