Use PyArg_UnpackTuple() where possible.

diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 29804f5ede47d40845879713e87edc66c5953400..0309f1de55997af0928c5969d71104f228b21f05 100644 (file)
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1806,7 +1806,7 @@ builtin_sum(PyObject *self, PyObject *args)
        PyObject *result = NULL;
        PyObject *temp, *item, *iter;
 
-       if (!PyArg_ParseTuple(args, "O|O:sum", &seq, &result))
+       if (!PyArg_UnpackTuple(args, "sum", 1, 2, &seq, &result))
                return NULL;
 
        iter = PyObject_GetIter(seq);