[source lang=”python”]
import tornado.web
import tornado.httpserver
import tornado.ioloop

class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Greetings from the instance %s!" % tornado.process.task_id())

app = tornado.web.Application([
(r"/", MainHandler),
])

if __name__ == "__main__":
server = tornado.httpserver.HTTPServer(app)
server.bind(8888)
server.start(0) # autodetect number of cores and fork a process for each
tornado.ioloop.IOLoop.instance().start()
[/source]