Feature Lookup
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class
databricks.feature_store.entities.feature_lookup.FeatureLookup(table_name: str, lookup_key: Union[str, List[str]], *, feature_names: Union[str, List[str], None] = None, rename_outputs: Optional[Dict[str, str]] = None, timestamp_lookup_key: Union[str, List[str], None] = None, **kwargs) Bases:
databricks.feature_store.entities._feature_store_object._FeatureStoreObjectValue class used to specify a feature to use in a
TrainingSet.Parameters: - table_name – Feature table name.
- lookup_key – Key to use when joining this feature table with the
DataFramepassed toFeatureStoreClient.create_training_set(). Thelookup_keymust be the columns in the DataFrame passed toFeatureStoreClient.create_training_set(). The type and order oflookup_keycolumns in that DataFrame must match the primary key of the feature table referenced in thisFeatureLookup. - feature_names – A single feature name, a list of feature names, or None to lookup all features (excluding primary keys) in the feature table at the time that the training set is created. If your model requires primary keys as features, you can declare them as independent FeatureLookups.
- rename_outputs – If provided, renames features in the
TrainingSetreturned by ofFeatureStoreClient.create_training_set. - timestamp_lookup_key –
Key to use when performing point-in-time lookup on this feature table with the
DataFramepassed toFeatureStoreClient.create_training_set(). Thetimestamp_lookup_keymust be the columns in the DataFrame passed toFeatureStoreClient.create_training_set(). The type oftimestamp_lookup_keycolumns in that DataFrame must match the type of the timestamp key of the feature table referenced in thisFeatureLookup.Note
Experimental: This argument may change or be removed in a future release without warning.
- feature_name – Feature name. Deprecated as of version 0.3.4. Use
feature_names. - output_name – If provided, rename this feature in the output of
FeatureStoreClient.create_training_set. Deprecated as of version 0.3.4 . Userename_outputs.
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__init__(table_name: str, lookup_key: Union[str, List[str]], *, feature_names: Union[str, List[str], None] = None, rename_outputs: Optional[Dict[str, str]] = None, timestamp_lookup_key: Union[str, List[str], None] = None, **kwargs) Initialize a FeatureLookup object.