These docs are for version 1.x of Rasa Open Source.

## User Guide

- [Installation](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/installation/)
- [Rasa Tutorial](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/rasa-tutorial/)
- [Command Line Interface](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/command-line-interface/)
- [Architecture](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/architecture/)
- [Messaging and Voice Channels](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/messaging-and-voice-channels/)
- [Evaluating Models](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/evaluating-models/)
- [Validate Data](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/validate-files/)
- [Running the Server](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/running-the-server/)
- [Running Rasa with Docker](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/running-rasa-with-docker/)
- [Cloud Storage](https://legacy-docs-v1.rasa.com/1.4.6/user-guide/cloud-storage/)

## NLU

- [About](https://legacy-docs-v1.rasa.com/1.4.6/nlu/about/)
- [Using NLU Only](https://legacy-docs-v1.rasa.com/1.4.6/nlu/using-nlu-only/)
- [Training Data Format](https://legacy-docs-v1.rasa.com/1.4.6/nlu/training-data-format/)
- [Choosing a Pipeline](https://legacy-docs-v1.rasa.com/1.4.6/nlu/choosing-a-pipeline/)
- [Language Support](https://legacy-docs-v1.rasa.com/1.4.6/nlu/language-support/)
- [Entity Extraction](https://legacy-docs-v1.rasa.com/1.4.6/nlu/entity-extraction/)
- [Components](https://legacy-docs-v1.rasa.com/1.4.6/nlu/components/)

## Core

- [About](https://legacy-docs-v1.rasa.com/1.4.6/core/about/)
- [Stories](https://legacy-docs-v1.rasa.com/1.4.6/core/stories/)
- [Domains](https://legacy-docs-v1.rasa.com/1.4.6/core/domains/)
- [Responses](https://legacy-docs-v1.rasa.com/1.4.6/core/responses/)
- [Actions](https://legacy-docs-v1.rasa.com/1.4.6/core/actions/)
- [Policies](https://legacy-docs-v1.rasa.com/1.4.6/core/policies/)
- [Slots](https://legacy-docs-v1.rasa.com/1.4.6/core/slots/)
- [Forms](https://legacy-docs-v1.rasa.com/1.4.6/core/forms/)
- [Retrieval Actions](https://legacy-docs-v1.rasa.com/1.4.6/core/retrieval-actions/)
- [Interactive Learning](https://legacy-docs-v1.rasa.com/1.4.6/core/interactive-learning/)
- [Fallback Actions](https://legacy-docs-v1.rasa.com/1.4.6/core/fallback-actions/)
- [Knowledge Base Actions](https://legacy-docs-v1.rasa.com/1.4.6/core/knowledge-bases/)

## Conversation Design

- [Dialogue Elements](https://legacy-docs-v1.rasa.com/1.4.6/dialogue-elements/dialogue-elements/)
- [Small Talk](https://legacy-docs-v1.rasa.com/1.4.6/dialogue-elements/small-talk/)
- [Completing Tasks](https://legacy-docs-v1.rasa.com/1.4.6/dialogue-elements/completing-tasks/)
- [Guiding Users](https://legacy-docs-v1.rasa.com/1.4.6/dialogue-elements/guiding-users/)

## API Reference

- [Action Server](https://legacy-docs-v1.rasa.com/1.4.6/api/action-server/)
- [HTTP API](https://legacy-docs-v1.rasa.com/1.4.6/api/http-api/)
- [Jupyter Notebooks](https://legacy-docs-v1.rasa.com/1.4.6/api/jupyter-notebooks/)
- [Agent](https://legacy-docs-v1.rasa.com/1.4.6/api/agent/)
- [Custom NLU Components](https://legacy-docs-v1.rasa.com/1.4.6/api/custom-nlu-components/)
- [Events](https://legacy-docs-v1.rasa.com/1.4.6/api/events/)
- [Tracker](https://legacy-docs-v1.rasa.com/1.4.6/api/tracker/#)
- [Tracker Stores](https://legacy-docs-v1.rasa.com/1.4.6/api/tracker-stores/)
- [Event Brokers](https://legacy-docs-v1.rasa.com/1.4.6/api/event-brokers/)
- [Lock Stores](https://legacy-docs-v1.rasa.com/1.4.6/api/lock-stores/)
- [Training Data Importers](https://legacy-docs-v1.rasa.com/1.4.6/api/training-data-importers/)
- [Featurization](https://legacy-docs-v1.rasa.com/1.4.6/api/featurization/)
- [Migration Guide](https://legacy-docs-v1.rasa.com/1.4.6/migration-guide/)
- [Rasa Change Log](https://legacy-docs-v1.rasa.com/1.4.6/changelog/)

## Migrate from (beta)

- [Dialogflow](https://legacy-docs-v1.rasa.com/1.4.6/migrate-from/google-dialogflow-to-rasa/)
- [Wit.ai](https://legacy-docs-v1.rasa.com/1.4.6/migrate-from/facebook-wit-ai-to-rasa/)
- [LUIS](https://legacy-docs-v1.rasa.com/1.4.6/migrate-from/microsoft-luis-to-rasa/)
- [IBM Watson](https://legacy-docs-v1.rasa.com/1.4.6/migrate-from/ibm-watson-to-rasa/)

## Reference

- [Glossary](https://legacy-docs-v1.rasa.com/1.4.6/glossary/)

## Versions

viewing: 1.4.6

## 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

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

### As Dialogue

`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`

### Current Slot Values

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