[PATCH v5 21/21] perf python: Correctly throw IndexError

[Ian Rogers <irogers@google.com>]

Correctly throw IndexError for out-of-bound accesses to evlist:
```
Python 3.11.9 (main, Jun 19 2024, 00:38:48) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path.insert(0, '/tmp/perf/python')
>>> import perf
>>> x=perf.parse_events('cycles')
>>> print(x)
evlist([cycles])
>>> x[2]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: Index out of range
```

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/python.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0d71ec673aa3..25114dcadd21 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1071,8 +1071,10 @@ static PyObject *pyrf_evlist__item(PyObject *obj, Py_ssize_t i)
 	struct pyrf_evlist *pevlist = (void *)obj;
 	struct evsel *pos;
 
-	if (i >= pevlist->evlist.core.nr_entries)
+	if (i >= pevlist->evlist.core.nr_entries) {
+		PyErr_SetString(PyExc_IndexError, "Index out of range");
 		return NULL;
+	}
 
 	evlist__for_each_entry(&pevlist->evlist, pos) {
 		if (i-- == 0)
-- 
2.47.0.163.g1226f6d8fa-goog