fbb2c7c7007dc373c462e39ab273a183a8823d58,sklearn/model_selection/_validation.py,,_fit_and_score,#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#Any#,385

Before Change

                test_scores = dict(zip(scorer.keys(),
                                   [error_score, ] * n_scorers))
                if return_train_score:
                    train_scores = dict(zip(scorer.keys(),
                                        [error_score, ] * n_scorers))
            else:
                test_scores = error_score
                if return_train_score:
                    train_scores = error_score

After Change

            raise
        elif isinstance(error_score, numbers.Number):
            if isinstance(scorer, dict):
                test_scores = {name: error_score for name in scorer}
                if return_train_score:
                    train_scores = test_scores.copy()
            else:
                test_scores = error_score

Instances