Function array_inplace_add

numpy/core/src/multiarray/number.c:693–699

}

static PyObject *
array_inplace_add(PyArrayObject *m1, PyObject *m2)
{
    INPLACE_GIVE_UP_IF_NEEDED(
            m1, m2, nb_inplace_add, array_inplace_add);
    return PyArray_GenericInplaceBinaryFunction(m1, m2, n_ops.add);
}

static PyObject *
array_inplace_subtract(PyArrayObject *m1, PyObject *m2)