Tim Cosemans

Hi! I was wondering the same thing. The '.effect' method does not seem to be doing what I want. As a consequence, I have come up with this piece of...

This might be a late answer, but it could help someone struggling with the same question It is not possible given the current version of the package (and the literature...

Have you tried passing a [StratifiedKFold](https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.StratifiedKFold.html)-object or creating your [own cv-splitter](https://stackoverflow.com/questions/27097330/how-to-customize-sklearn-cross-validation-iterator-by-indices)? That could help you out in the meantime