ToolPythonBeginner Classification with scikit-learn: telling two populations apart scores = cross_val_score(model, X_train, y_train, cv=5)raw = cross_val_score(KNeighborsClassifier(n_neighbors=k), X_train, y_train, cv=5).mean()scaled = cross_val_score(pipe, X_train, y_train, cv=5).mean()