feature_selection# RFE - num+y-tr - reg - RFECV - num+y-tr - reg - SelectFdr - num+y-tr-cl - default - SelectFpr - num+y-tr-cl - default - SelectFwe - num+y-tr-cl - alpha100 - SelectKBest - num+y-tr - k2 - SelectFromModel - num+y-tr - rf - SelectPercentile - num+y-tr - p50 - VarianceThreshold - num-tr - default -