gistfile1.py

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()