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Twisted
#######
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For information on changes in this release, see the [NEWS] file.
Sponsors
--------
Twisted is an MIT-licensed open source project with its ongoing development
made possible entirely by the support of community and these awesome
sponsors.
If you'd like to join them, please consider [sponsoring Twisted's]
development.
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What is this?
-------------
Twisted is a Python event-based framework for internet applications.
It includes modules for many different purposes, including the following:
- ``twisted.web``: HTTP clients and servers, HTML templating, and a WSGI
server
- ``twisted.conch``: SSHv2 and Telnet clients and servers and terminal
emulators
- ``twisted.words``: Clients and servers for IRC, XMPP, and other IM
protocols
- ``twisted.mail``: IMAPv4, POP3, SMTP clients and servers
- ``twisted.positioning``: Tools for communicating with NMEA-compatible GPS
receivers
- ``twisted.names``: DNS client and tools for making your own DNS servers
- ``twisted.trial``: A unit testing framework that integrates well with
Twisted-based code.
Twisted supports all major system event loops -- select (all platforms),
poll (most POSIX platforms), epoll (Linux), kqueue (FreeBSD, macOS), IOCP
(Windows), and various GUI event loops (GTK+2/3, Qt, wxWidgets).
Third-party reactors can plug into Twisted, and provide support for
additional event loops.
Installing
----------
To install the latest version of Twisted using pip::
$ pip install twisted
Additional instructions for installing this software are in [the
installation instructions].
Documentation and Support
-------------------------
Twisted's documentation is available from the [Twisted Matrix Read The Docs
website].
This documentation contains how-tos, code examples, and an API reference.
Help is also available on the [Twisted mailing list].
There is also an IRC channel, ``#twisted``,
on the `Libera.Chat `_ network.
A web client is available at `web.libera.chat `_.
Unit Tests
----------
Twisted has a comprehensive test suite, which can be run by tox::
$ tox -l # to view all test environments
$ tox -e nocov # to run all the tests without coverage
$ tox -e withcov # to run all the tests with coverage
$ tox -e alldeps-withcov-posix # install all dependencies, run tests with
coverage on POSIX platform
You can test running the test suite under the different reactors with the
TWISTED_REACTOR environment variable::
$ env TWISTED_REACTOR=epoll tox -e alldeps-withcov-posix
Some of these tests may fail if you:
* don't have the dependencies required for a particular subsystem
installed,
* have a firewall blocking some ports (or things like Multicast, which
Linux NAT has shown itself to do), or
* run them as root.
Static Code Checkers
--------------------
You can ensure that code complies to Twisted [coding standards]::
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