ydb/contrib/python/tornado/tornado-6

Tornado Web Server
==================

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`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:

.. code-block:: python

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