code: def publish_prompt(self, event=None):
          
  
          prompt = Prompt(self.name, self.pipeline_id)
          try:
              publish(prompt)
          except PromptFailed:
              raise
          except Exception as e:
              raise PromptFailed("{}: {}".format(type(e), str(e)))
docs: Publishes prompt for a given event.
  
          Used to prompt downstream process application when an event
          is published by this application's model, which can happen
          when application command methods, rather than the process policy,
          are called.
  
          Wraps exceptions with PromptFailed, to avoid application policy exceptions being
          seen directly in other applications when running synchronously in single thread.