Function coerce_index

numpy/core/src/multiarray/iterators.c:31–41

* Tries to convert 'o' into an npy_intp interpreted as an * index. Returns 1 if it was successful, 0 otherwise. Does * not set an exception. */

 * not set an exception.
 */
static int
coerce_index(PyObject *o, npy_intp *v)
{
    *v = PyArray_PyIntAsIntp(o);

    if ((*v) == -1 && PyErr_Occurred()) {
        PyErr_Clear();
        return 0;
    }
    return 1;
}

/*
 * This function converts one element of the indexing tuple