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Name: tornado
Version: 4.2.1
Summary: Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.
Home-page: http://www.tornadoweb.org/
Author: Facebook
Author-email: python-tornado@googlegroups.com
License: http://www.apache.org/licenses/LICENSE-2.0
Description: Tornado Web Server
==================
`Tornado <http://www.tornadoweb.org>`_ is a Python web framework and
asynchronous networking library, originally developed at `FriendFeed
<http://friendfeed.com>`_. By using non-blocking network I/O, Tornado
can scale to tens of thousands of open connections, making it ideal for
`long polling <http://en.wikipedia.org/wiki/Push_technology#Long_polling>`_,
`WebSockets <http://en.wikipedia.org/wiki/WebSocket>`_, and other
applications that require a long-lived connection to each user.
Upgrade notes
-------------
As of Tornado 3.2, the `backports.ssl_match_hostname
<https://pypi.python.org/pypi/backports.ssl_match_hostname>`_ package
must be installed when running Tornado on Python 2. This will be
installed automatically when using ``pip`` or ``easy_install``.
Quick links
-----------
* `Documentation <http://www.tornadoweb.org/en/stable/>`_
* `Source (github) <https://github.com/tornadoweb/tornado>`_
* `Mailing list <http://groups.google.com/group/python-tornado>`_
* `Stack Overflow <http://stackoverflow.com/questions/tagged/tornado>`_
* `Wiki <https://github.com/tornadoweb/tornado/wiki/Links>`_
Hello, world
------------
Here is a simple "Hello, world" example web app for Tornado:
.. code-block:: python
import tornado.ioloop
import tornado.web
class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Hello, world")
application = tornado.web.Application([
(r"/", MainHandler),
])
if __name__ == "__main__":
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()
This example does not use any of Tornado's asynchronous features; for
that see this `simple chat room
<https://github.com/tornadoweb/tornado/tree/stable/demos/chat>`_.
Installation
------------
**Automatic installation**::
pip install tornado
Tornado is listed in `PyPI <http://pypi.python.org/pypi/tornado/>`_ and
can be installed with ``pip`` or ``easy_install``. Note that the
source distribution includes demo applications that are not present
when Tornado is installed in this way, so you may wish to download a
copy of the source tarball as well.
**Manual installation**: Download the latest source from `PyPI
<http://pypi.python.org/pypi/tornado/>`_.
.. parsed-literal::
tar xvzf tornado-$VERSION.tar.gz
cd tornado-$VERSION
python setup.py build
sudo python setup.py install
The Tornado source code is `hosted on GitHub
<https://github.com/tornadoweb/tornado>`_.
**Prerequisites**: Tornado runs on Python 2.6, 2.7, 3.2, 3.3, and 3.4. It
requires the `certifi <https://pypi.python.org/pypi/certifi>`_ package
on all Python versions, and the `backports.ssl_match_hostname
<https://pypi.python.org/pypi/backports.ssl_match_hostname>`_ package
on Python 2. These will be installed automatically when using
``pip`` or ``easy_install``). Some Tornado features may
require one of the following optional libraries:
* `unittest2 <https://pypi.python.org/pypi/unittest2>`_ is needed to run
Tornado's test suite on Python 2.6 (it is unnecessary on more recent
versions of Python)
* `concurrent.futures <https://pypi.python.org/pypi/futures>`_ is the
recommended thread pool for use with Tornado and enables the use of
``tornado.netutil.ThreadedResolver``. It is needed only on Python 2;
Python 3 includes this package in the standard library.
* `pycurl <http://pycurl.sourceforge.net>`_ is used by the optional
``tornado.curl_httpclient``. Libcurl version 7.18.2 or higher is required;
version 7.21.1 or higher is recommended.
* `Twisted <http://www.twistedmatrix.com>`_ may be used with the classes in
`tornado.platform.twisted`.
* `pycares <https://pypi.python.org/pypi/pycares>`_ is an alternative
non-blocking DNS resolver that can be used when threads are not
appropriate.
* `Monotime <https://pypi.python.org/pypi/Monotime>`_ adds support for
a monotonic clock, which improves reliability in environments
where clock adjustments are frequent. No longer needed in Python 3.3.
**Platforms**: Tornado should run on any Unix-like platform, although
for the best performance and scalability only Linux (with ``epoll``)
and BSD (with ``kqueue``) are recommended for production deployment
(even though Mac OS X is derived from BSD and supports kqueue, its
networking performance is generally poor so it is recommended only for
development use). Tornado will also run on Windows, although this
configuration is not officially supported and is recommended only for
development use.
Discussion and support
----------------------
You can discuss Tornado on `the Tornado developer mailing list
<http://groups.google.com/group/python-tornado>`_, and report bugs on
the `GitHub issue tracker
<https://github.com/tornadoweb/tornado/issues>`_. Links to additional
resources can be found on the `Tornado wiki
<https://github.com/tornadoweb/tornado/wiki/Links>`_. New releases are
announced on the `announcements mailing list
<http://groups.google.com/group/python-tornado-announce>`_.
Tornado is one of `Facebook's open source technologies
<http://developers.facebook.com/opensource/>`_. It is available under
the `Apache License, Version 2.0
<http://www.apache.org/licenses/LICENSE-2.0.html>`_.
This web site and all documentation is licensed under `Creative
Commons 3.0 <http://creativecommons.org/licenses/by/3.0/>`_.
Platform: UNKNOWN
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.2
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
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