PyArg_ParseKeywords?

[Steven Bethard]

Is there a PyArg_ParseKeywords along the lines of 
PyArg_ParseTupleAndKeywords?  I want to parse only the keywords, 
ignoring the arguments.  Currently I do this with something like:

const char *format = "O:min";
static char *kwlist[] = {"key", 0};
PyObject *empty_args = Py_BuildValue("()");
if (!PyArg_ParseTupleAndKeywords(empty_args, kwds, (char *)format,
        kwlist, &keyfunc)) {
        return NULL;
}
Py_DECREF(empty_args);
but I'm hoping there's a way around creating an empty argument tuple.  I 
assume I could just use PyDict_GetItemString on the kwds directly, but 
I'd rather not have to duplicate all the error checking in vgetargskeywords.

(If you're wondering why I would want such a thing, the application is 
adding a 'key' keyword argument to min/max, and it can't be considered 
as a positional parameter or the max(a, b, c, key=func) form will treat 
func as another item to be compared.)

Steve
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