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-rw-r--r--Objects/sliceobject.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c
index 7198cca..796df2b 100644
--- a/Objects/sliceobject.c
+++ b/Objects/sliceobject.c
@@ -174,7 +174,7 @@ slice_new(PyTypeObject *type, PyObject *args, PyObject *kw)
start = stop = step = NULL;
- if (!PyArg_ParseTuple(args, "O|OO:slice", &start, &stop, &step))
+ if (!PyArg_UnpackTuple(args, "slice", 1, 3, &start, &stop, &step))
return NULL;
/* This swapping of stop and start is to maintain similarity with