The FeatureList class is used as a constructor to create a FeatureList Object. A FeatureList object is added to the catalog only when explicitly saved.
A Feature List is a collection of Feature Objects specifically designed to address a particular Use Case. The Feature List is initially used to gather historical feature values for EDA, training, or testing data for a Use Case. These values are then utilized to analyze features, train, and test models. Once a model is trained and validated, the Feature List can be deployed, and the feature values can be accessed through online serving for generating predictions.
Before serving a feature list, you can verify its primary entity using the primary_entity attribute. If the features within the list relate to different primary entities, the feature list's primary entity is determined based on the relationships between the entities, with the lowest-level entity chosen as the primary entity. If there are no relationships between entities, the primary entity may become a tuple comprising those entities.
For example, imagine a feature list that includes features related to a card, customer, and customer city. In this scenario, the primary entity is the card entity because it is a child of both the customer and customer city entities. However, if the feature list also contains features for a merchant and merchant city, the primary entity becomes a tuple of card and merchant.
- items: Sequence[Union[Feature, BaseFeatureGroup]]
- name: str