http://hg.python.org/cpython/rev/ee627983ba28 changeset: 87655:ee627983ba28 branch: 2.7 parent: 87644:30b3798782f1 user: Alexandre Vassalotti <alexandre@peadrop.com> date: Sat Nov 30 13:24:13 2013 -0800 summary: Issue #16231: Allow false values other than None to be used as persistent IDs. files: Lib/pickle.py | 2 +- Lib/test/pickletester.py | 40 +++++++++++++++------------ Misc/NEWS | 5 +++ 3 files changed, 28 insertions(+), 19 deletions(-) diff --git a/Lib/pickle.py b/Lib/pickle.py --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -269,7 +269,7 @@ def save(self, obj): # Check for persistent id (defined by a subclass) pid = self.persistent_id(obj) - if pid: + if pid is not None: self.save_pers(pid) return diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py --- a/Lib/test/pickletester.py +++ b/Lib/test/pickletester.py @@ -1152,30 +1152,34 @@ if isinstance(object, int) and object % 2 == 0: self.id_count += 1 return str(object) + elif object == "test_false_value": + self.false_count += 1 + return "" else: return None def persistent_load(self, oid): - self.load_count += 1 - object = int(oid) - assert object % 2 == 0 - return object + if not oid: + self.load_false_count += 1 + return "test_false_value" + else: + self.load_count += 1 + object = int(oid) + assert object % 2 == 0 + return object def test_persistence(self): - self.id_count = 0 - self.load_count = 0 - L = range(10) - self.assertEqual(self.loads(self.dumps(L)), L) - self.assertEqual(self.id_count, 5) - self.assertEqual(self.load_count, 5) - - def test_bin_persistence(self): - self.id_count = 0 - self.load_count = 0 - L = range(10) - self.assertEqual(self.loads(self.dumps(L, 1)), L) - self.assertEqual(self.id_count, 5) - self.assertEqual(self.load_count, 5) + L = range(10) + ["test_false_value"] + for proto in protocols: + self.id_count = 0 + self.false_count = 0 + self.load_false_count = 0 + self.load_count = 0 + self.assertEqual(self.loads(self.dumps(L, proto)), L) + self.assertEqual(self.id_count, 5) + self.assertEqual(self.false_count, 1) + self.assertEqual(self.load_count, 5) + self.assertEqual(self.load_false_count, 1) class AbstractPicklerUnpicklerObjectTests(unittest.TestCase): diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -15,6 +15,11 @@ Library ------- +- Issue #16231: Fixed pickle.Pickler to only fallback to its default pickling + behaviour when Pickler.persistent_id returns None, but not for any other + false values. This allows false values other values other than None to be + used as persistent IDs. This behaviour is consistent with cPickle. + - Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with virtual interface. Original patch by Kent Frazier. -- Repository URL: http://hg.python.org/cpython