Twisted

Twisted is an event-driven networking framework written in Python and licensed under the MIT license.

High-Level Overview of Twisted

Guide

http://twistedmatrix.com/trac/wiki/Downloads
wget http://tmrc.mit.edu/mirror/twisted/Twisted/2.5/Twisted-2.5.0.tar.bz2
bunzip2 Twisted-2.5.0.tar.bz2
tar xvf Twisted-2.5.0.tar
cd Twisted-2.5.0
cd zope.interface-3.3.0
python setup.py install
cd ..
python setup.py install
$ trial twisted // Trial is Twisted's testing framework.
>>> from twisted.web.client import getPage
>>> from twisted.internet import reactor
>>> def printContents(contents):
print "The Deferred has called printContents with the following contents:"
print contents
reactor.stop()
>>> deferred = getPage('http://www.huihoo.com/')
>>> deferred.addCallback(printContents)
<Deferred at 0xb9afd0>
>>> reactor.run()

Projects

Twisted Asynchronous networking framework
Twisted Conch: An SSH and SFTP protocol implementation together with clients and servers
Twisted Web: An HTTP protocol implementation together with clients and servers
Twisted Web2: An HTTP/1.1 Server Framework
Twisted Mail: An SMTP, IMAP and POP protocol implementation together with clients and servers
Twisted Names: A DNS protocol implementation with client and server
Twisted News: An NNTP protocol implementation with client and server
Twisted Words: Chat and Instant Messaging
Twisted Lore: Documentation generator with HTML and LaTeX support
Twisted Flow: Generator based asynchronous result flows (unmaintained)
Twisted Pair: Low-level stuff (unmaintained)
Twisted Runner: Process management, including an inetd server

http://twistedmatrix.com/projects/

Writing a TCP App

TCPServer.py TCPClient.py Services which allow you to make connections and listen for connections on TCP ports.

listenTCP
connectTCP

http://twistedmatrix.com/projects/core/documentation/howto/application.html

Writing TCP server

Server: 192.168.1.3 , Debian 3.1

Writing TCP client

Client: 192.168.1.2 , WinXP

Software that uses Twisted

BitTorrent - a peer-to-peer file sharing program.
BuildBot - a distributed building/testing framework.
Python Director - pure Python tcp load balancer.
Freevo - open-source home theatre and PVR PC platform.
NXLucene - a standalone multi-threaded Lucene-based text indexing server.
Zenoss - open source network/systems monitoring and management

More details: http://twistedmatrix.com/trac/wiki/ProjectsUsingTwisted