Function initialize_normal_kwds

numpy/core/src/umath/override.c:100–139

* Build a dictionary from the keyword arguments, but replace out with the * normalized version (and always pass it even if it was passed by position). */

 * normalized version (and always pass it even if it was passed by position).
 */
static int
initialize_normal_kwds(PyObject *out_args,
        PyObject *const *args, Py_ssize_t len_args, PyObject *kwnames,
        PyObject *normal_kwds)
{
    if (kwnames != NULL) {
        for (Py_ssize_t i = 0; i < PyTuple_GET_SIZE(kwnames); i++) {
            if (PyDict_SetItem(normal_kwds,
                    PyTuple_GET_ITEM(kwnames, i), args[i + len_args]) < 0) {
                return -1;
            }
        }
    }
    static PyObject *out_str = NULL;
    if (out_str == NULL) {
        out_str = PyUnicode_InternFromString("out");
        if (out_str == NULL) {
            return -1;
        }
    }

    if (out_args != NULL) {
        /* Replace `out` argument with the normalized version */
        int res = PyDict_SetItem(normal_kwds, out_str, out_args);
        if (res < 0) {
            return -1;
        }
    }
    else {
        /* Ensure that `out` is not present. */
        int res = PyDict_Contains(normal_kwds, out_str);
        if (res < 0) {
            return -1;
        }
        if (res) {
            return PyDict_DelItem(normal_kwds, out_str);
        }
    }
    return 0;
}

/*
 * ufunc() and ufunc.outer() accept 'sig' or 'signature'.  We guarantee