<!-- If your issue is a usage question, submit it here instead: - StackOverflow with the scikit-learn tag: http://stackoverflow.com/questions/tagged/scikit-learn - Mailing List: https://mail.python.org/mailman/listinfo/scikit-learn For more information, see User Questions: http://scikit-learn.org/stable/support.html#user-questions --> <!-- Instructions For Filing a Bug: https://github.com/scikit-learn/scikit-learn/blob/master/CONTRIBUTING.md#filing-bugs --> #### Description <!-- Example: Joblib Error thrown when calling fit on LatentDirichletAllocation with evaluate_every > 0--> For now, `GridSearchCV` and `RandomizedSearchCV` do not allow for scorer sample weights (although they allow training weights). Are you considering adding this feature? If not, would you like me to give it a try?