Tornado is a scalable, non-blocking web server and web application framework written in Python.[2] It was developed for use by FriendFeed; the company was acquired by Facebook in 2009 and Tornado was open-sourced soon after.[3]
Performance[edit]Tornado is noted for its high performance. Its design enables handling a large number of concurrent connections (i.e., tries to solve the "C10k problem").
Modules[edit] An asynchronous MongoDB driver called Motor. CouchDB drivers called corduroy and trombi. Asynchronous driver for PostgreSQL wrapping psycopg called Momoko Example[edit]The following code shows a simple web application that displays "Hello World!" when visited:[4]
import asyncio import tornado.web 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()) See also[edit] Free and open-source software portal Django (web framework) FastAPI Flask (web framework) Jam.py Pylons project Web2py Comparison of web server software References[edit] ^ "Release 6.5.2". 8 August 2025. Retrieved 18 August 2025. ^ "Home - tornado - GitHub". GitHub. Retrieved 2009-09-10. ^ "Facebook open-sources real-time FriendFeed facet". CNet. Archived from the original on 2012-01-30. Retrieved 2009-09-10. ^ "Hello, world". Retrieved 2022-09-14. External links[edit] Official website vtePython web frameworks CherryPy CubicWeb Django FastAPI Flask Grok Nevow Pylons Pyramid Quixote Tornado TurboGears TwistedWeb web2py Zope 2 more... 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