code: def get_event(self, event_name, event_history=None):
          
          if event_history is None:
              event_history = event_name + '_history'
          return self._db.rpoplpush(event_name, event_history)
docs: Get an event from the database.
  
          Gets an event from the named event list removing the event and
          adding it to the event history.
  
          Args:
              event_name (str): Event list key.
              event_history (str, optional): Event history list.
  
          Returns:
              str: string representation of the event object