427 static PyObject *
428 Radix_search_best(RadixObject *self, PyObject *args, PyObject *kw_args)
429 {
430 	radix_node_t *node;
431 	RadixNodeObject *node_obj;
432 	prefix_t *prefix;
433 	static char *keywords[] = { "network", "masklen", "packed", NULL };
434 
435 	char *addr = NULL, *packed = NULL;
436 	long prefixlen = -1;
437 	int packlen = -1;
438 
439 	if (!PyArg_ParseTupleAndKeywords(args, kw_args, "|sls#:search_best", keywords,
when PyArg_ParseTupleAndKeywords() succeeds
taking False path
440 	    &addr, &prefixlen, &packed, &packlen))
441 		return NULL;
442 	if ((prefix = args_to_prefix(addr, packed, packlen, prefixlen)) == NULL)
when treating unknown struct prefix_t * from radix_python.c:442 as NULL
taking True path
443 		return NULL;
444 
445 	if ((node = radix_search_best(PICKRT(prefix, self), prefix)) == NULL || 
446 	    node->data == NULL) {
447 		Deref_Prefix(prefix);
448 		Py_INCREF(Py_None);
449 		return Py_None;
450 	}
451 	Deref_Prefix(prefix);
452 	node_obj = node->data;
453 	Py_XINCREF(node_obj);
454 	return (PyObject *)node_obj;
455 }
returning (PyObject*)NULL without setting an exception