hello.py

#sudo apt-get install python-tornado
#there is an altertive as python3-tornado

#file below code into hello.py

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

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

if __name__ == "__main__":
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()


#python hello.py

#curl <ip>:8888
#Hello, worldroot