def get(self): self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop.IOLoop.current() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

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() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

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() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

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() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

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() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

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() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)

self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Examples Here is a sample synchronous function: from tornado.httpclient import

def get(self): self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop.IOLoop.current() asynchronous functions by definition interact differently with their callers; there is no free way to make a synchronous function asynchronous in a way that is transparent to its callers (systems like gevent lightweight threads to offer performance comparable to asynchronous systems, but they do not actually make things asynchronous). Asynchronous operations in Tornado generally return placeholder objects (Futures)