Twisted 16.3.1
==============

|pypi|
|coverage|
|travis|

.. code::

    <tomprince> [...] that made me think of (infinity,1)-groupoids and motivic and crystalline cohomology. :)
    <@glyph> tomprince: NO IDEA IF THOSE ARE REAL WORDS
    <tomprince> They are.
    <tomprince> It would have been no fun to come up with nonsense, when there is perfectly good existing abstract nonsense to choose from.


For information on what's new in Twisted 16.3.1, see the `NEWS <NEWS>`_ file that comes with the distribution.


What is this?
-------------

Twisted is an event-based framework for internet applications, supporting Python 2.7 and Python 3.3+.
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 recievers
- ``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, OS X), 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 <INSTALL.rst>`_.


Documentation and Support
-------------------------

Twisted's documentation is available from the `Twisted Matrix website <http://twistedmatrix.com/documents/current/>`_.
This documentation contains how-tos, code examples, and an API reference.

Help is also available on the `Twisted mailing list <http://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 ``chat.freenode.net``.


Unit Tests
----------

Twisted has a comprehensive test suite, which can be run by ``tox``::

  $ tox -l            # to view all test environments
  $ tox -e py27-tests # to run the tests for Python 2.7
  $ tox -e py34-tests # to run the tests for Python 3.4


You can test running the test suite under the different reactors with the ``TWISTED_REACTOR`` environment variable::

  $ env TWISTED_REACTOR=epoll tox -e py27-tests


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.


Copyright
---------

All of the code in this distribution is Copyright (c) 2001-2016 Twisted Matrix Laboratories.

Twisted is made available under the MIT license.
The included `LICENSE <LICENSE>`_ file describes this in detail.


Warranty
--------

  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.


.. |coverage| image:: https://codecov.io/github/twisted/twisted/coverage.svg?branch=trunk
.. _coverage: https://codecov.io/github/twisted/twisted

.. |pypi| image:: http://img.shields.io/pypi/v/twisted.svg
.. _pypi: https://pypi.python.org/pypi/twisted

.. |travis| image:: https://travis-ci.org/twisted/twisted.svg?branch=trunk
.. _travis https://travis-ci.org/twisted/twisted
