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Ehsan Meisami

LightFM how to make predictions for new users (cold start) - user id 8 not in user id mappings

try to use `fit_partial()`

ValueError: Test interactions matrix and train interactions matrix share 95786 interactions. This will cause incorrect evaluation, check your data split.

I am having the same problem.

Implicit positive and negative feedback

When creating your interaction matrix, you can use a negative value for returned items, zero for neutral and a positive value for purchased items as your rating column.