当LightGBM.cv时,如果min_data_in_leaf设置的值比默认值(20)小的时候,就会报错: LightGBMError: Reducing `min_data_in_leaf` with `feature_pre_filter=true` may cause unexpected behaviour for features that were pre-filtered by the larger `min_data_in_leaf`. You need to set `feature_pre_filter...