. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2 Web framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WSGIAdapter(tornado_app) See the appengine example application for a full-featured AppEngine app built on Tornado. 5.2 Web framework 5.2.1 tornado.web — RequestHandler and Application classes tornado.web provides a simple use IOLoop.add_callback to transfer control back to the main thread before finishing the request, 5.2. Web framework 37 Tornado Documentation, Release 5.1.1 or to limit your use of other threads to IOLoop