Fix #11491. When dbm.open was called with a file which already exists and
the "flag" argument is "n", dbm.error was being raised. As documented,
dbm.open(...,flag='n') will now "Always create a new, empty database,
open for reading and writing", regardless of a previous file existing.
diff --git a/Lib/test/test_dbm.py b/Lib/test/test_dbm.py
index 74c9c44..26d4c14 100644
--- a/Lib/test/test_dbm.py
+++ b/Lib/test/test_dbm.py
@@ -70,6 +70,14 @@
self.read_helper(f)
f.close()
+ def test_anydbm_creation_n_file_exists_with_invalid_contents(self):
+ with open(_fname, "w") as w:
+ pass # create an empty file
+
+ f = dbm.open(_fname, 'n')
+ self.addCleanup(f.close)
+ self.assertEqual(len(f), 0)
+
def test_anydbm_modification(self):
self.init_db()
f = dbm.open(_fname, 'c')