Function PyArray_IntpFromIndexSequence

numpy/core/src/multiarray/conversion_utils.c:1091–1109

* Reads values from a sequence of integers and stores them into an array. * * @param seq A sequence created using `PySequence_Fast`. * @param vals Array used to store dimensions (must be large enough to * hold `maxvals` values). * @param max_vals Maximum number of dimensions that can be written into `vals`. * @return Number of dimensions or -1 if an

 *      for the number of values.
 */
NPY_NO_EXPORT npy_intp
PyArray_IntpFromIndexSequence(PyObject *seq, npy_intp *vals, npy_intp maxvals)
{
    /*
     * First of all, check if sequence is a scalar integer or if it can be
     * "casted" into a scalar.
     */
    Py_ssize_t nd = PySequence_Fast_GET_SIZE(seq);
    PyObject *op;
    for (Py_ssize_t i = 0; i < PyArray_MIN(nd, maxvals); i++) {
        op = PySequence_Fast_GET_ITEM(seq, i);

        vals[i] = dimension_from_scalar(op);
        if (error_converting(vals[i])) {
            return -1;
        }
    }
    return nd;
}

/*NUMPY_API
 * PyArray_IntpFromSequence