These docs are for version 1.x of Rasa Open Source. [Docs for the new version 2.0 can be found here.](/content/docs/rasa/index.html) # User Guide - [Installation](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/installation/) - [Rasa Tutorial](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/rasa-tutorial/) - [Command Line Interface](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/command-line-interface/) - [Architecture](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/architecture/) - [Messaging and Voice Channels](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/messaging-and-voice-channels/) - [Evaluating Models](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/evaluating-models/) - [Validate Data](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/validate-files/) - [Running the Server](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/running-the-server/) - [Running Rasa with Docker](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/running-rasa-with-docker/) - [Cloud Storage](https://legacy-docs-v1.rasa.com/1.3.10/user-guide/cloud-storage/) # NLU - [About](https://legacy-docs-v1.rasa.com/1.3.10/nlu/about/) - [Using NLU Only](https://legacy-docs-v1.rasa.com/1.3.10/nlu/using-nlu-only/) - [Training Data Format](https://legacy-docs-v1.rasa.com/1.3.10/nlu/training-data-format/) - [Choosing a Pipeline](https://legacy-docs-v1.rasa.com/1.3.10/nlu/choosing-a-pipeline/) - [Language Support](https://legacy-docs-v1.rasa.com/1.3.10/nlu/language-support/) - [Entity Extraction](https://legacy-docs-v1.rasa.com/1.3.10/nlu/entity-extraction/) - [Components](https://legacy-docs-v1.rasa.com/1.3.10/nlu/components/) # Core - [About](https://legacy-docs-v1.rasa.com/1.3.10/core/about/) - [Stories](https://legacy-docs-v1.rasa.com/1.3.10/core/stories/) - [Domains](https://legacy-docs-v1.rasa.com/1.3.10/core/domains/) - [Responses](https://legacy-docs-v1.rasa.com/1.3.10/core/responses/) - [Actions](https://legacy-docs-v1.rasa.com/1.3.10/core/actions/) - [Policies](https://legacy-docs-v1.rasa.com/1.3.10/core/policies/) - [Slots](https://legacy-docs-v1.rasa.com/1.3.10/core/slots/) - [Forms](https://legacy-docs-v1.rasa.com/1.3.10/core/forms/) - [Retrieval Actions](https://legacy-docs-v1.rasa.com/1.3.10/core/retrieval-actions/) - [Interactive Learning](https://legacy-docs-v1.rasa.com/1.3.10/core/interactive-learning/) - [Fallback Actions](https://legacy-docs-v1.rasa.com/1.3.10/core/fallback-actions/) - [Knowledge Base Actions](https://legacy-docs-v1.rasa.com/1.3.10/core/knowledge-bases/) # Conversation Design - [Dialogue Elements](https://legacy-docs-v1.rasa.com/1.3.10/dialogue-elements/dialogue-elements/) - [Small Talk](https://legacy-docs-v1.rasa.com/1.3.10/dialogue-elements/small-talk/) - [Completing Tasks](https://legacy-docs-v1.rasa.com/1.3.10/dialogue-elements/completing-tasks/) - [Guiding Users](https://legacy-docs-v1.rasa.com/1.3.10/dialogue-elements/guiding-users/) # API Reference - [Action Server](https://legacy-docs-v1.rasa.com/1.3.10/api/action-server/) - [HTTP API](https://legacy-docs-v1.rasa.com/1.3.10/api/http-api/) - [Jupyter Notebooks](https://legacy-docs-v1.rasa.com/1.3.10/api/jupyter-notebooks/) - [Agent](https://legacy-docs-v1.rasa.com/1.3.10/api/agent/) - [Custom NLU Components](https://legacy-docs-v1.rasa.com/1.3.10/api/custom-nlu-components/) - [Events](https://legacy-docs-v1.rasa.com/1.3.10/api/events/) - [Tracker](https://legacy-docs-v1.rasa.com/1.3.10/api/tracker/#) - [Tracker Stores](https://legacy-docs-v1.rasa.com/1.3.10/api/tracker-stores/) - [Event Brokers](https://legacy-docs-v1.rasa.com/1.3.10/api/event-brokers/) - [Lock Stores](https://legacy-docs-v1.rasa.com/1.3.10/api/lock-stores/) - [Training Data Importers](https://legacy-docs-v1.rasa.com/1.3.10/api/training-data-importers/) - [Featurization](https://legacy-docs-v1.rasa.com/1.3.10/api/featurization/) - [Migration Guide](https://legacy-docs-v1.rasa.com/1.3.10/migration-guide/) - [Rasa Change Log](https://legacy-docs-v1.rasa.com/1.3.10/changelog/) # Migrate from (beta) - [Dialogflow](https://legacy-docs-v1.rasa.com/1.3.10/migrate-from/google-dialogflow-to-rasa/) - [Wit.ai](https://legacy-docs-v1.rasa.com/1.3.10/migrate-from/facebook-wit-ai-to-rasa/) - [LUIS](https://legacy-docs-v1.rasa.com/1.3.10/migrate-from/microsoft-luis-to-rasa/) - [IBM Watson](https://legacy-docs-v1.rasa.com/1.3.10/migrate-from/ibm-watson-to-rasa/) # Reference - [Glossary](https://legacy-docs-v1.rasa.com/1.3.10/glossary/) # Versions viewing: 1.3.10 # Tracker _class_`rasa.core.trackers.``DialogueStateTracker`( _sender_id_, _slots_, _max_event_history=None_, _sender_source=None_) Maintains the state of a conversation. The field max_event_history will only give you these last events, it can be set in the tracker_store `applied_events`() Returns all actions that should be applied - w/o reverted events. Return type `List` `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` `current_state`( _event_verbosity=_) Return the current tracker state as an object. Return type `Dict` `events_after_latest_restart`() Return a list of events after the most recent restart. Return type `List` `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` _classmethod_`from_dict`( _sender_id_, _events_as_dict_, _slots=None_, _max_event_history=None_) Create a tracker from dump. The dump should be an array of dumped events. When restoring the tracker, these events will be replayed to recreate the state. Return type [`DialogueStateTracker`] `generate_all_prior_trackers`() Returns a generator of the previous trackers of this tracker. The resulting array is representing the trackers before each action. Return type `Generator` `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. Returns event which matched the query or None if no event matched. Return type `Optional` `get_latest_entity_values`( _entity_type_, _entity_role=None_, _entity_group=None_) Get entity values found for the passed entity type and optional role and group in latest message. Return type `Iterator` `get_latest_input_channel`() Get the name of the input_channel of the latest UserUttered event Return type `Optional` `get_slot`( _key_) Retrieves the value of a slot. Return type `Optional` `idx_after_latest_restart`() Return the idx of the most recent restart in the list of events. Return type `int` `init_copy`() Creates a new state tracker with the same initial values. Return type [`DialogueStateTracker`] `is_paused`() State whether the tracker is currently paused. Return type `bool` `last_executed_action_has`( _name_, _skip=0_) Returns whether last ActionExecuted event had a specific name. Returns True if last executed action had name name, otherwise False. Return type `bool` `past_states`( _domain_) Generate the past states of this tracker based on the history. Return type `deque` `recreate_from_dialogue`( _dialogue_) Use a serialised Dialogue to update the trackers state. Return type `None` `reject_action`( _action_name_) Notify active form that it was rejected Return type `None` `replay_events`() Update the tracker based on a list of events. Return type `None` `set_form_validation`( _validate_) Toggle form validation Return type `None` `set_latest_action_name`( _action_name_) Set latest action name and reset form validation and rejection parameters Return type `None` `travel_back_in_time`( _target_time_) Creates a new tracker with a state at a specific timestamp. Return type [`DialogueStateTracker`] `trigger_followup_action`( _action_) Triggers another action following the execution of the current. Return type `None` `update`( _event_, _domain=None_) Modify the state of the tracker according to an `Event`. Return type `None`