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Accept None as start and stop parameters for list.index() and tuple.index().

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Closes #13340.
This commit is contained in:
Petri Lehtinen 2011-11-05 23:23:17 +02:00
commit 8e9f6c4251
5 changed files with 39 additions and 7 deletions
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14
Objects/listobject.c
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@ -2122,12 +2122,20 @@ listindex(PyListObject *self, PyObject *args)
{
Py_ssize_t i, start=0, stop=Py_SIZE(self);
PyObject *v, *format_tuple, *err_string;
PyObject *start_obj = NULL, *stop_obj = NULL;
static PyObject *err_format = 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)