code: def make_application(version, app_name, app_urls, kwargs=None):
      
      if kwargs is None:
          kwargs = {}
  
      urls = make_endpoints(version, app_name, app_urls, kwargs)
      application = tornado.web.Application(
              urls,
              default_handler_class=kwargs.get('default_handler_class', ErrorHandler))
  
      return application
docs: Loads the routes and starts the server
  
      :param version: the application version
      :param app_name: the application name
      :param app_urls: a list of application endpoints
      :param kwargs: dictionary of options
      :returns: tornado.web.Application instance