old_contents: # coding: utf-8
  import tornado.ioloop
  from urls import routes
  import settings
  
  application = tornado.web.Application(routes, **settings.CONFIG)
  
  if __name__ == "__main__":
      application.listen(8888)
      tornado.ioloop.IOLoop.instance().start()
  
new_contents: #!/usr/bin/env python
  # coding: utf-8
  import tornado.ioloop
  from urls import routes
  import settings
  
  application = tornado.web.Application(routes, **settings.CONFIG)
  
  if __name__ == "__main__":
      application.listen(8888)
      tornado.ioloop.IOLoop.instance().start()
  
subject: Update run.py