from mlxtend.classifier import StackingCVClassifier, StackingClassifier
s_clf = StackingClassifier(classifiers=[linear_svc, xgb_model, lgb_model],
meta_classifier=lr, use_probas=True, verbose=3)
s_clf.fit(X_train_std, y_train)
# 评估 Stacking 模型
model_metrics(s_clf, X_train_std, X_test_std, y_train, y_test)