BoostLGBM
- class lightautoml.ml_algo.boost_lgbm.BoostLGBM(default_params=None, freeze_defaults=True, timer=None, optimization_search_space={})[source]
Bases:
lightautoml.ml_algo.base.TabularMLAlgo
,lightautoml.pipelines.selection.base.ImportanceEstimator
Gradient boosting on decision trees from LightGBM library.
default_params: All available parameters listed in lightgbm documentation:
freeze_defaults:
True
: params may be rewritten depending on dataset.False
: params may be changed only manually or with tuning.
timer:
Timer
instance orNone
.- init_params_on_input(train_valid_iterator)[source]
Get model parameters depending on dataset parameters.
- Parameters
train_valid_iterator (
TrainValidIterator
) – Classic cv-iterator.- Return type
- Returns
Parameters of model.
- fit_predict_single_fold(train, valid)[source]
Implements training and prediction on single fold.
- Parameters
train (
Union
[NumpyDataset
,PandasDataset
]) – Train Dataset.valid (
Union
[NumpyDataset
,PandasDataset
]) – Validation Dataset.
- Return type
- Returns
Tuple (model, predicted_values)
- predict_single_fold(model, dataset)[source]
Predict target values for dataset.
- Parameters
model (
Booster
) – Lightgbm object.dataset (
Union
[NumpyDataset
,PandasDataset
]) – Test Dataset.
- Return type
- Returns
Predicted target values.
- get_features_score()[source]
Computes feature importance as mean values of feature importance provided by lightgbm per all models.
- Return type
- Returns
Series with feature importances.
- fit(train_valid)[source]
Just to be compatible with
ImportanceEstimator
.- Parameters
train_valid (
TrainValidIterator
) – Classic cv-iterator.