Method __array_ufunc__

numpy/core/tests/test_multiarray.py:4007–4012

(self, ufunc, method, *inputs, **kw)

        # regression test for github bug 4753
        class OutClass(np.ndarray):
            def __array_ufunc__(self, ufunc, method, *inputs, **kw):
                if 'out' in kw:
                    tmp_kw = kw.copy()
                    tmp_kw.pop('out')
                    func = getattr(ufunc, method)
                    kw['out'][0][...] = func(*inputs, **tmp_kw)

        A = np.array([0]).view(OutClass)
        B = np.array([5])