Function PyArray_OptionalIntpConverter

numpy/core/src/multiarray/conversion_utils.c:217–225

* Like PyArray_IntpConverter, but leaves `seq` untouched if `None` is passed * rather than treating `None` as `()`. */

 * rather than treating `None` as `()`.
 */
NPY_NO_EXPORT int
PyArray_OptionalIntpConverter(PyObject *obj, PyArray_Dims *seq)
{
    if (obj == Py_None) {
        return NPY_SUCCEED;
    }

    return PyArray_IntpConverter(obj, seq);
}

NPY_NO_EXPORT int
PyArray_CopyConverter(PyObject *obj, _PyArray_CopyMode *copymode) {