Tracker

Trackers maintain the state of a dialogue between the assistant and the user in the form of conversation sessions. To learn more about how to configure the session behavior, check out the docs on Session configuration.

Class rasa.core.trackers.DialogueStateTracker(sender_id, slots, max_event_history=None, sender_source=None)

Maintains the state of a conversation.

Methods

• applied_events()
  Returns all actions that should be applied - w/o reverted events.
  Return type: List[Event]

• as_dialogue()
  Return a Dialogue object containing all of the turns.
  This can be serialised and later used to recover the state of this tracker exactly.
  Return type: Dialogue

• change_form_to(form_name)
  Activate or deactivate a form.
  Return type: None

• clear_followup_action()
  Clears follow up action when it was executed.
  Return type: None

• copy()
  Creates a duplicate of this tracker.
  Return type: DialogueStateTracker

• current_slot_values()
  Return the currently set values of the slots.
  Return type: Dict[str, Any]

• current_state(event_verbosity=<EventVerbosity.NONE: 1>)
  Return the current tracker state as an object.
  Return type: Dict[str, Any]

• events_after_latest_restart()
  Return a list of events after the most recent restart.
  Return type: List[Event]

• export_stories(e2e=False, include_source=False)
  Dump the tracker as a story in the Rasa Core story format.
  Returns the dumped tracker as a string.
  Return type: str

• export_stories_to_file(export_path='debug.md')
  Dump the tracker as a story to a file.
  Return type: None

• Class method from_dict(sender_id, events_as_dict, slots=None, max_event_history=None)
  Create a tracker from dump.
  Return type: DialogueStateTracker

• generate_all_prior_trackers()
  Returns a generator of the previous trackers of this tracker.
  Return type: Generator[DialogueStateTracker, None, None]

• get_last_event_for(event_type, action_names_to_exclude=None, skip=0)
  Gets the last event of a given type which was actually applied.

Additional methods include:

• get_latest_entity_values(entity_type, entity_role=None, entity_group=None)
• get_latest_input_channel()
• get_slot(key)
• idx_after_latest_restart()
• init_copy()
• is_paused()
• last_executed_action_has(name, skip=0)
• past_states(domain)
• recreate_from_dialogue(dialogue)
• reject_action(action_name)
• replay_events()
• set_form_validation(validate)
• set_latest_action_name(action_name)
• travel_back_in_time(target_time)
• trigger_followup_action(action)
• update(event, domain=None)