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

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  • License: Apache Software License (Apache-2.0)
  • Author: Facebook
  • Requires: Python >=3.9
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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 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

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  • License: Apache Software License (Apache-2.0)
  • Author: Facebook
  • Requires: Python >=3.9
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