Class A

numpy/core/tests/test_multiarray.py:4080–4083

    def test_pos_array_ufunc_override(self):
        class A(np.ndarray):
            def __array_ufunc__(self, ufunc, method, *inputs, **kwargs):
                return getattr(ufunc, method)(*[i.view(np.ndarray) for
                                                i in inputs], **kwargs)
        tst = np.array('foo').view(A)
        with assert_raises(TypeError):
            +tst