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Issue #17900: Allowed pickling of recursive OrderedDicts. Decreased pickled

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size and pickling time.
This commit is contained in:
Serhiy Storchaka 2013-05-21 12:47:57 +03:00
parent b10c71daa2
commit 3ee6dabf5b
3 changed files with 15 additions and 6 deletions
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13
Lib/test/test_collections.py
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@ -1245,9 +1245,18 @@ class TestOrderedDict(unittest.TestCase):
# do not save instance dictionary if not needed
pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)]
od = OrderedDict(pairs)
self.assertEqual(len(od.__reduce__()), 2)
self.assertIsNone(od.__reduce__()[2])
od.x = 10
self.assertEqual(len(od.__reduce__()), 3)
self.assertIsNotNone(od.__reduce__()[2])
def test_pickle_recursive(self):
od = OrderedDict()
od[1] = od
for proto in range(-1, pickle.HIGHEST_PROTOCOL + 1):
dup = pickle.loads(pickle.dumps(od, proto))
self.assertIsNot(dup, od)
self.assertEqual(list(dup.keys()), [1])
self.assertIs(dup[1], dup)
def test_repr(self):
od = OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)])