Skip to main content
Help us improve Python packaging – donate today!

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

Project Description

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 tornado.ioloop
import tornado.web

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

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

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

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 http://www.tornadoweb.org

Release history Release notifications

History Node

5.0.2

History Node

5.0.1

History Node

5.0

History Node

5.0b1

History Node

5.0a1

History Node

4.5.3

History Node

4.5.2

History Node

4.5.1

History Node

4.5

History Node

4.5b2

History Node

4.5b1

History Node

4.4.3

History Node

4.4.2

This version
History Node

4.4.1

History Node

4.4

History Node

4.4b1

History Node

4.3

History Node

4.3b2

History Node

4.3b1

History Node

4.2.1

History Node

4.2

History Node

4.2b1

History Node

4.1

History Node

4.1b2

History Node

4.0.2

History Node

4.0.1

History Node

4.0

History Node

3.2.2

History Node

3.2.1

History Node

3.2

History Node

3.1.1

History Node

3.1

History Node

3.0.2

History Node

3.0.1

History Node

3.0

History Node

2.4.1

History Node

2.4

History Node

2.3

History Node

2.2.1

History Node

2.2

History Node

2.1.1

History Node

2.1

History Node

2.0

History Node

1.2.1

History Node

1.2

History Node

1.1.1

History Node

1.1

History Node

1.0

History Node

0.2

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
tornado-4.4.1-cp35-cp35m-win32.whl (404.1 kB) Copy SHA256 hash SHA256 Wheel cp35 Jul 23, 2016
tornado-4.4.1-cp35-cp35m-win_amd64.whl (404.7 kB) Copy SHA256 hash SHA256 Wheel cp35 Jul 23, 2016
tornado-4.4.1.tar.gz (457.0 kB) Copy SHA256 hash SHA256 Source None Jul 23, 2016

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page