Function int_sequence_to_arrays

numpy/core/src/multiarray/compiled_base.c:919–954

* Converts a Python sequence into 'count' PyArrayObjects * * seq - Input Python object, usually a tuple but any sequence works. * Must have integral content. * paramname - The name of the parameter that produced 'seq'. * count - How many arrays there should be (errors if it doesn't match). * op - Where the arrays are placed. */

 * op          - Where the arrays are placed.
 */
static int int_sequence_to_arrays(PyObject *seq,
                              char *paramname,
                              int count,
                              PyArrayObject **op
                              )
{
    int i;

    if (!PySequence_Check(seq) || PySequence_Size(seq) != count) {
        PyErr_Format(PyExc_ValueError,
                "parameter %s must be a sequence of length %d",
                paramname, count);
        return -1;
    }

    for (i = 0; i < count; ++i) {
        PyObject *item = PySequence_GetItem(seq, i);
        if (item == NULL) {
            goto fail;
        }
        op[i] = astype_anyint(item);
        Py_DECREF(item);
        if (op[i] == NULL) {
            goto fail;
        }
    }

    return 0;

fail:
    while (--i >= 0) {
        Py_XDECREF(op[i]);
        op[i] = NULL;
    }
    return -1;
}

/* Inner loop for ravel_multi_index */
static int