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This is unreleased documentation for Rasa Open Source Documentation Master/Unreleased version.
For the latest released documentation, see the latest version (2.8.x).

Version: Master/Unreleased

rasa.core.policies._ensemble

PolicyEnsemble Objects

class PolicyEnsemble()

check_domain_ensemble_compatibility

@staticmethod
def check_domain_ensemble_compatibility(ensemble: Optional["PolicyEnsemble"], domain: Optional[Domain]) -> None

Check for elements that only work with certain policy/domain combinations.

persist

def persist(path: Union[Text, Path]) -> None

Persists the policy to storage.

load

@classmethod
def load(cls, path: Union[Text, Path], new_config: Optional[Dict] = None, finetuning_epoch_fraction: float = 1.0) -> "PolicyEnsemble"

Loads policy and domain specification from disk.

get_featurizer_from_dict

@classmethod
def get_featurizer_from_dict(cls, policy: Dict[Text, Any]) -> Tuple[Any, Any]

Gets the featurizer initializer and its arguments from a policy config.

SimplePolicyEnsemble Objects

class SimplePolicyEnsemble(PolicyEnsemble)

Default implementation of a Policy ensemble.

is_not_in_training_data

@staticmethod
def is_not_in_training_data(policy_name: Optional[Text], max_confidence: Optional[float] = None) -> bool

Checks if the prediction is by a policy which memoized the training data.

Arguments:

  • policy_name - The name of the policy.
  • max_confidence - The max confidence of the policy's prediction.
  • Returns - True if it's a MemoizationPolicy, False otherwise.

probabilities_using_best_policy

def probabilities_using_best_policy(tracker: DialogueStateTracker, domain: Domain, interpreter: NaturalLanguageInterpreter, **kwargs: Any, ,) -> PolicyPrediction

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

Picks the best policy prediction based on probabilities and policy priority. Triggers fallback if action_listen is predicted after a user utterance.

Arguments:

  • tracker - the :class:rasa.core.trackers.DialogueStateTracker
  • domain - the :class:rasa.shared.core.domain.Domain
  • interpreter - Interpreter which may be used by the policies to create additional features.

Returns:

The best policy prediction.

InvalidPolicyConfig Objects

class InvalidPolicyConfig(RasaException)

Exception that can be raised when policy config is not valid.