tornado 6.5.5


pip install tornado

  Latest version

Released: Mar 10, 2026
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Author: Facebook
Requires Python: >= 3.9
Classifiers

License
  • OSI Approved :: Apache Software License

Programming Language
  • Python :: 3
  • Python :: 3.9
  • Python :: 3.10
  • Python :: 3.11
  • Python :: 3.12
  • Python :: 3.13
  • Python :: Implementation :: CPython
  • Python :: Implementation :: PyPy
Join the chat at https://gitter.im/tornadoweb/tornado

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.

Hello, world

Here is a simple “Hello, world” example web app for Tornado:

import asyncio
import tornado

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])

async def main():
    app = make_app()
    app.listen(8888)
    await asyncio.Event().wait()

if __name__ == "__main__":
    asyncio.run(main())

This example does not use any of Tornado’s asynchronous features; for that see this simple chat room.

Documentation

Documentation and links to additional resources are available at https://www.tornadoweb.org

6.5.5 Mar 10, 2026
6.5.4 Dec 15, 2025
6.5.3 Dec 11, 2025
6.5.2 Aug 08, 2025
6.5.1 May 22, 2025
6.5 May 15, 2025
6.5b1 Apr 30, 2025
6.4.2 Nov 22, 2024
6.4.1 Jun 06, 2024
6.4 Nov 29, 2023
6.4b1 Nov 16, 2023
6.3.3 Aug 11, 2023
6.3.2 May 14, 2023
6.3.1 Apr 21, 2023
6.3 Apr 18, 2023
6.3b1 Apr 09, 2023
6.2 Jul 03, 2022
6.2b2 Jun 18, 2022
6.2b1 Jun 11, 2022
6.1 Oct 30, 2020
6.1b2 Oct 25, 2020
6.1b1 Sep 30, 2020
6.0.4 Mar 04, 2020
6.0.3 Jun 23, 2019
6.0.2 Mar 23, 2019
6.0.1 Mar 03, 2019
6.0 Mar 01, 2019
6.0b1 Feb 10, 2019
6.0a1 Jan 02, 2019
5.1.1 Sep 16, 2018
5.1 Jul 11, 2018
5.1b1 Jun 11, 2018
5.0.2 Apr 08, 2018
5.0.1 Mar 18, 2018
5.0 Mar 05, 2018
5.0b1 Jan 27, 2018
5.0a1 Dec 27, 2017
4.5.3 Jan 06, 2018
4.5.2 Aug 27, 2017
4.5.1 Apr 20, 2017
4.5 Apr 16, 2017
4.5b2 Apr 11, 2017
4.5b1 Mar 26, 2017
4.4.3 Mar 30, 2017
4.4.2 Sep 30, 2016
4.4.1 Jul 23, 2016
4.4 Jul 15, 2016
4.4b1 Jul 08, 2016
4.3 Nov 06, 2015
4.3b2 Oct 24, 2015
4.3b1 Oct 18, 2015
4.2.1 Jul 17, 2015
4.2 May 27, 2015
4.2b1 May 10, 2015
4.1 Feb 07, 2015
4.1b2 Feb 01, 2015
4.0.2 Sep 11, 2014
4.0.1 Aug 12, 2014
4.0 Jul 15, 2014
3.2.2 Jun 04, 2014
3.2.1 May 06, 2014
3.2 Jan 14, 2014
3.1.1 Sep 01, 2013
3.1 Jun 15, 2013
3.0.2 Jun 02, 2013
3.0.1 Apr 09, 2013
3.0 Mar 29, 2013
2.4.1 Nov 25, 2012
2.4 Sep 04, 2012
2.3 Jun 01, 2012
2.2.1 May 22, 2014
2.2 May 22, 2014
2.1.1 May 22, 2014
2.1 May 22, 2014
2.0 May 22, 2014
1.2.1 May 22, 2014
1.2 May 22, 2014
1.1.1 May 22, 2014
1.1 May 22, 2014
1.0 Jul 23, 2010
0.2 May 18, 2010

Wheel compatibility matrix

Platform CPython >=3.9 (abi3)
macosx_10_9_universal2
macosx_10_9_x86_64
manylinux1_x86_64
manylinux2014_aarch64
manylinux_2_17_aarch64
manylinux_2_28_aarch64
manylinux_2_28_x86_64
manylinux_2_5_x86_64
musllinux_1_2_aarch64
musllinux_1_2_x86_64
win32
win_amd64
win_arm64

Files in release

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