Ranker

Base class for ranking models.

Parameters

• seed

  Type → int | None

  Default → None

  Random number generation seed. Set this for reproducibility.

Attributes

• is_contextual

Methods

learn_one

Fits a user-item pair and a real-valued target y.

Parameters

• user — 'ID'
• item — 'ID'
• y — 'Reward'
• x — 'dict | None' — defaults to None

predict_one

Predicts the target value of a set of features x.

Parameters

• user — 'ID'
• item — 'ID'
• x — 'dict | None' — defaults to None

Returns

Reward: The predicted preference from the user for the item.

rank

Rank models by decreasing order of preference for a given user.

Parameters

• user — 'ID'
• items — 'set[ID]'
• x — 'dict | None' — defaults to None