（積ん読）3.3.1. The scoring parameter: defining model evaluation rules
https://scikit-learn.org/stable/modules/model_evaluation.html#scoring-parameter
predefined valuesのテーブル
分類問題について
All scorer objects follow the convention that higher return values are better than lower return values.
scoringに"f1_macro"と指定するとf1_score関数がmacro-averagedで適用される