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Version: Master/Unreleased

rasa.core.policies.unexpected_intent_policy

UnexpecTEDIntentPolicyGraphComponent Objects

class UnexpecTEDIntentPolicyGraphComponent(TEDPolicy)

UnexpecTEDIntentPolicy has the same model architecture as TEDPolicy.

The difference is at a task level. Instead of predicting the next probable action, this policy predicts whether the last predicted intent is a likely intent according to the training stories and conversation context.

get_default_config

@staticmethod
def get_default_config() -> Dict[Text, Any]

Returns the default config (see parent class for full docstring).

__init__

def __init__(config: Dict[Text, Any], model_storage: ModelStorage, resource: Resource, execution_context: ExecutionContext, model: Optional[RasaModel] = None, featurizer: Optional[TrackerFeaturizer] = None, fake_features: Optional[Dict[Text, List[Features]]] = None, entity_tag_specs: Optional[List[EntityTagSpec]] = None, label_quantiles: Optional[Dict[int, List[float]]] = None)

Declares instance variables with default values.

model_class

@staticmethod
def model_class() -> Type["IntentTED"]

Gets the class of the model architecture to be used by the policy.

Returns:

Required class.

compute_label_quantiles_post_training

def compute_label_quantiles_post_training(model_data: RasaModelData, label_ids: np.ndarray) -> None

Computes quantile scores for prediction of action_unlikely_intent.

Multiple quantiles are computed for each label so that an appropriate threshold can be picked at inference time according to the tolerance value specified.

Arguments:

  • model_data - Data used for training the model.
  • label_ids - Numerical IDs of labels for each data point used during training.

run_training

def run_training(model_data: RasaModelData, label_ids: Optional[np.ndarray] = None) -> None

Feeds the featurized training data to the model.

Arguments:

  • model_data - Featurized training data.
  • label_ids - Label ids corresponding to the data points in model_data.

Raises:

RasaCoreException if label_ids is None as it's needed for running post training procedures.

predict_action_probabilities

def predict_action_probabilities(tracker: DialogueStateTracker, domain: Domain, precomputations: Optional[MessageContainerForCoreFeaturization] = None, rule_only_data: Optional[Dict[Text, Any]] = None, **kwargs: Any, ,) -> PolicyPrediction

Predicts the next action the bot should take after seeing the tracker.

Arguments:

  • tracker - Tracker containing past conversation events.
  • domain - Domain of the assistant.
  • precomputations - Contains precomputed features and attributes.
  • rule_only_data - Slots and loops which are specific to rules and hence should be ignored by this policy.

Returns:

The policy's prediction (e.g. the probabilities for the actions).

persist_model_utilities

def persist_model_utilities(model_path: Path) -> None

Persists model's utility attributes like model weights, etc.

Arguments:

  • model_path - Path where model is to be persisted

IntentTED Objects

class IntentTED(TED)

Follows TED's model architecture from https://arxiv.org/abs/1910.00486.

However, it has been re-purposed to predict multiple labels (intents) instead of a single label (action).

dot_product_loss_layer

@property
def dot_product_loss_layer() -> tf.keras.layers.Layer

Returns the dot-product loss layer to use.

Multiple intents can be valid simultaneously, so IntentTED uses the MultiLabelDotProductLoss.

Returns:

The loss layer that is used by _prepare_dot_product_loss.

run_bulk_inference

def run_bulk_inference(model_data: RasaModelData) -> Dict[Text, np.ndarray]

Computes model's predictions for input data.

Arguments:

  • model_data - Data to be passed as input

Returns:

Predictions for the input data.