text: """
  
  """
  import gevent.monkey
  
  gevent.monkey.patch_all()
  
  from flask import Flask
  
  app = Flask('Simple')
  
  
  @app.route('/hello/demo')
  def hello():
      return "<b>hello</b>"
  
  
  if __name__ == '__main__':
      from gevent.pywsgi import WSGIServer
  
      server = WSGIServer(('0.0.0.0', 8081), application=app)
      print(app.url_map)
      server.serve_forever()
  