Accept None as start and stop parameters for list.index() and tuple.index()
Closes #13340.
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 3249ccc..1f2ab55 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -510,12 +510,19 @@
tupleindex(PyTupleObject *self, PyObject *args)
{
Py_ssize_t i, start=0, stop=Py_SIZE(self);
- PyObject *v;
+ PyObject *v, *start_obj = NULL, *stop_obj = NULL;
- if (!PyArg_ParseTuple(args, "O|O&O&:index", &v,
- _PyEval_SliceIndex, &start,
- _PyEval_SliceIndex, &stop))
+ if (!PyArg_ParseTuple(args, "O|OO:index", &v, &start_obj, &stop_obj))
return NULL;
+
+ if (start_obj != Py_None)
+ if (!_PyEval_SliceIndex(start_obj, &start))
+ return NULL;
+
+ if (stop_obj != Py_None)
+ if (!_PyEval_SliceIndex(stop_obj, &stop))
+ return NULL;
+
if (start < 0) {
start += Py_SIZE(self);
if (start < 0)