{'boosting_type': 'gbdt', 'objective': 'regression_l1', 'metric': {'l1'}, 'num_boost_round': 5000, 'learning_rates': 0.01, 'max_depth': 10, 'num_leaves': 220, 'num_threads': 8, 'bagging_fraction': 0.75, 'bagging_freq': 5, 'bagging_seed': 20190507, 'feature_fraction': 0.75, 'feature_fraction_seed': 20190508, 'min_data_in_leaf': 30, 'min_sum_hessian_in_leaf': 0.002}