SelectKBestfeature_names_in_ndarray of shape (n_features_in_,)Names of features seen during fit. Defined only when X has feature names that are all strings. See also f_classifANOVA F-value between label/feature for classification tasks. mutual_info_classifMutual information for a discrete target. chi2Chi-squared stats of non-negative features for classification tasks. f_regressionF-value between label/featur
