test_twodim_base.py 文件源码

def test_tril_triu_with_inf():
    # Issue 4859
    arr = np.array([[1, 1, np.inf],
                    [1, 1, 1],
                    [np.inf, 1, 1]])
    out_tril = np.array([[1, 0, 0],
                         [1, 1, 0],
                         [np.inf, 1, 1]])
    out_triu = out_tril.T
    assert_array_equal(np.triu(arr), out_triu)
    assert_array_equal(np.tril(arr), out_tril)