lenskit/lkpy

Python recommendation toolkit

1 good first / help-wanted issue · Python · last activity Jul 10, 2025

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lenskit python recsys scikit

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1 Open Issue Need Help Last updated: Jul 10, 2025

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Revise missing history warning for item-item (and other components) over 1 year ago

AI Summary: Improve the warning mechanism in the LensKit Python recommendation toolkit's `ItemKNNScorer` (and potentially other components). The current warning for missing user history incorrectly triggers when a user is unknown in the training data. The task involves revising the warning logic to only trigger when a genuine history component is missing, possibly by checking if the query is a `RecQuery`.

Complexity: 3/5

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lenskit/lkpy

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Python recommendation toolkit

Python

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