bpo-34204: Use pickle.DEFAULT_PROTOCOL in shelve (GH-19639)
Use pickle.DEFAULT_PROTOCOL (currently 5) in shelve instead of a
hardcoded 3.
diff --git a/Lib/test/test_shelve.py b/Lib/test/test_shelve.py
index ac25eee..cfdd67c 100644
--- a/Lib/test/test_shelve.py
+++ b/Lib/test/test_shelve.py
@@ -1,6 +1,8 @@
import unittest
import shelve
import glob
+import pickle
+
from test import support
from test.support import os_helper
from collections.abc import MutableMapping
@@ -160,7 +162,7 @@ def test_with(self):
def test_default_protocol(self):
with shelve.Shelf({}) as s:
- self.assertEqual(s._protocol, 3)
+ self.assertEqual(s._protocol, pickle.DEFAULT_PROTOCOL)
from test import mapping_tests