test_cross_validation.py 文件源码

def test_cross_val_generator_with_indices():
    X = np.array([[1, 2], [3, 4], [5, 6], [7, 8]])
    y = np.array([1, 1, 2, 2])
    labels = np.array([1, 2, 3, 4])
    # explicitly passing indices value is deprecated
    loo = cval.LeaveOneOut(4)
    lpo = cval.LeavePOut(4, 2)
    kf = cval.KFold(4, 2)
    skf = cval.StratifiedKFold(y, 2)
    lolo = cval.LeaveOneLabelOut(labels)
    lopo = cval.LeavePLabelOut(labels, 2)
    ps = cval.PredefinedSplit([1, 1, 2, 2])
    ss = cval.ShuffleSplit(2)
    for cv in [loo, lpo, kf, skf, lolo, lopo, ss, ps]:
        for train, test in cv:
            assert_not_equal(np.asarray(train).dtype.kind, 'b')
            assert_not_equal(np.asarray(train).dtype.kind, 'b')
            X[train], X[test]
            y[train], y[test]