Tornado (web server)

Tornado is a scalable, non-blocking web server and web application framework written in Python. It was developed for use by FriendFeed; the company was acquired by Facebook in 2009 and Tornado was open-sourced soon after.

WWW tornadoweb.org

Performance

Tornado is noted for its high performance. Its design enables handling a large number of concurrent connections.

Modules

An asynchronous MongoDB driver called Motor.
CouchDB drivers called corduroy and trombi.
Asynchronous driver for PostgreSQL wrapping psycopg called Momoko

Example

The following code shows a simple web application that displays "Hello World!" when visited:

import asyncio
import tornado.web
class MainHandler:
def get:
self.write
def make_app:
return tornado.web.Application
async def main:
app = make_app
app.listen
await asyncio.Event.wait
if __name__ "__main__":
asyncio.run)