dbm.gnu and dbm.ndbm accept both strings and bytes as keys and values. For the

former they are converted to bytes before being written to the DB.

Closes issue 3799. Reviewed by Skip Montanaro.

Lib/test/test_dbm_gnu.py

@@ -20,9 +20,11 @@ def test_key_methods(self):
         self.assertEqual(self.g.keys(), [])
         self.g['a'] = 'b'
         self.g['12345678910'] = '019237410982340912840198242'
+        self.g[b'bytes'] = b'data'
         key_set = set(self.g.keys())
         self.assertEqual(key_set, set([b'a', b'12345678910']))
         self.assert_(b'a' in self.g)
+        self.assertEqual(self.g[b'bytes'], b'data')
         key = self.g.firstkey()
         while key:
             self.assert_(key in key_set)