test_base.py 文件源码

def test_clone():
    # Tests that clone creates a correct deep copy.
    # We create an estimator, make a copy of its original state
    # (which, in this case, is the current state of the estimator),
    # and check that the obtained copy is a correct deep copy.

    from sklearn.feature_selection import SelectFpr, f_classif

    selector = SelectFpr(f_classif, alpha=0.1)
    new_selector = clone(selector)
    assert_true(selector is not new_selector)
    assert_equal(selector.get_params(), new_selector.get_params())

    selector = SelectFpr(f_classif, alpha=np.zeros((10, 2)))
    new_selector = clone(selector)
    assert_true(selector is not new_selector)