Tornado is a complete web framework and a standalone web server in itself. Here, we will use Flask to create our application, which is basically a combination of URL routing and templating, and leave the server part to Tornado. Tornado is built to hold thousands of simultaneous standing connections and makes applications very scalable.
Tornado has limitations while working with WSGI applications, so choose wisely! You can read more at http://www.tornadoweb.org/en/stable/wsgi.html#running-wsgi-apps-on-tornado-servers.
