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For information on changes in this release, see the
NEWS <NEWS.rst>_ file.
Twisted is an event-based framework for internet applications, supporting Python 3.5+. 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),
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.
To install the latest version of Twisted using pip::
$ pip install twisted
Additional instructions for installing this software are in
the installation instructions <INSTALL.rst>_.
Twisted's documentation is available from the
Twisted Matrix website <https://twistedmatrix.com/documents/current/>_.
This documentation contains how-tos, code examples, and an API reference.
Help is also available on the
Twisted mailing list <https://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python>_.
There is also a pair of very lively IRC channels,
#twisted (for general Twisted questions) and
#twisted.web (for Twisted Web), on
Twisted has a comprehensive test suite, which can be run by
$ 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:
You can ensure that code complies to Twisted
coding standards <https://twistedmatrix.com/documents/current/core/development/policy/coding-standard.html>_::
$ tox -e lint # run pre-commit to check coding stanards $ tox -e mypy # run MyPy static type checker to check for type errors
Or, for speed, use pre-commit directly::
$ pipx run pre-commit run
All of the code in this distribution is Copyright (c) 2001-2020 Twisted Matrix Laboratories.
Twisted is made available under the MIT license.
LICENSE <LICENSE>_ file describes this in detail.
THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE USE OF THIS SOFTWARE IS WITH YOU.
IN NO EVENT WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE LIBRARY, BE LIABLE TO YOU FOR ANY DAMAGES, EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Again, see the included
LICENSE <LICENSE>_ file for specific legal details.
.. |circleci| image:: https://circleci.com/gh/twisted/twisted.svg?style=svg .. _circleci: https://circleci.com/gh/twisted/twisted
.. |mypy| image:: https://github.com/twisted/twisted/workflows/mypy/badge.svg .. _mypy: https://github.com/twisted/twisted