Method sum

numpy/core/tests/test_numeric.py:3570–3571

(self, axis=None, dtype=None, out=None)

    class sub_array(np.ndarray):
        def sum(self, axis=None, dtype=None, out=None):
            return np.ndarray.sum(self, axis, dtype, out, keepdims=True)

    def test_raise(self):
        sub_class = self.sub_array