Function PyArray_SubclassWrap

numpy/core/src/multiarray/ctors.c:4046–4063

* Calls arr_of_subclass.__array_wrap__(towrap), in order to make 'towrap' * have the same ndarray subclass as 'arr_of_subclass'. */

 * have the same ndarray subclass as 'arr_of_subclass'.
 */
NPY_NO_EXPORT PyArrayObject *
PyArray_SubclassWrap(PyArrayObject *arr_of_subclass, PyArrayObject *towrap)
{
    PyObject *wrapped = PyObject_CallMethodObjArgs((PyObject *)arr_of_subclass,
            npy_ma_str_array_wrap, (PyObject *)towrap, NULL);
    if (wrapped == NULL) {
        return NULL;
    }
    if (!PyArray_Check(wrapped)) {
        PyErr_SetString(PyExc_RuntimeError,
                "ndarray subclass __array_wrap__ method returned an "
                "object which was not an instance of an ndarray subclass");
        Py_DECREF(wrapped);
        return NULL;
    }

    return (PyArrayObject *)wrapped;
}