Créer un serveur "Hello World" (HTTP) dans Tornado

$ pip install tornado --user
Collecting tornado
Collecting singledispatch (from tornado)
  Using cached singledispatch-3.4.0.3-py2.py3-none-any.whl
Collecting certifi (from tornado)
  Using cached certifi-2016.9.26-py2.py3-none-any.whl
Collecting backports-abc>=0.4 (from tornado)
  Using cached backports_abc-0.5-py2.py3-none-any.whl
Requirement already satisfied: six in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from singledispatch->tornado)
Installing collected packages: singledispatch, certifi, backports-abc, tornado
Successfully installed backports-abc-0.5 certifi-2016.9.26 singledispatch-3.4.0.3 tornado-4.4.2

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello World\n");

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler)
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()

$ python server.py

$ wget -q -O - http://localhost:8888/
Hello World

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