test_svm.py 文件源码

def test_linearsvx_loss_penalty_deprecations():
    X, y = [[0.0], [1.0]], [0, 1]

    msg = ("loss='%s' has been deprecated in favor of "
           "loss='%s' as of 0.16. Backward compatibility"
           " for the %s will be removed in %s")

    # LinearSVC
    # loss l1 --> hinge
    assert_warns_message(DeprecationWarning,
                         msg % ("l1", "hinge", "loss='l1'", "1.0"),
                         svm.LinearSVC(loss="l1").fit, X, y)

    # loss l2 --> squared_hinge
    assert_warns_message(DeprecationWarning,
                         msg % ("l2", "squared_hinge", "loss='l2'", "1.0"),
                         svm.LinearSVC(loss="l2").fit, X, y)

    # LinearSVR
    # loss l1 --> epsilon_insensitive
    assert_warns_message(DeprecationWarning,
                         msg % ("l1", "epsilon_insensitive", "loss='l1'",
                                "1.0"),
                         svm.LinearSVR(loss="l1").fit, X, y)

    # loss l2 --> squared_epsilon_insensitive
    assert_warns_message(DeprecationWarning,
                         msg % ("l2", "squared_epsilon_insensitive",
                                "loss='l2'", "1.0"),
                         svm.LinearSVR(loss="l2").fit, X, y)