Issue #1100562: Fix deep-copying of objects derived from the list and dict types.
Patch by Michele Orrù and Björn Lindqvist.
diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index 732b4f4..a84c109 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -532,6 +532,26 @@
self.assertEqual(x.foo, y.foo)
self.assertTrue(x.foo is not y.foo)
+ def test_deepcopy_dict_subclass(self):
+ class C(dict):
+ def __init__(self, d=None):
+ if not d:
+ d = {}
+ self._keys = list(d.keys())
+ super().__init__(d)
+ def __setitem__(self, key, item):
+ super().__setitem__(key, item)
+ if key not in self._keys:
+ self._keys.append(key)
+ x = C(d={'foo':0})
+ y = copy.deepcopy(x)
+ self.assertEqual(x, y)
+ self.assertEqual(x._keys, y._keys)
+ self.assertTrue(x is not y)
+ x['bar'] = 1
+ self.assertNotEqual(x, y)
+ self.assertNotEqual(x._keys, y._keys)
+
def test_copy_list_subclass(self):
class C(list):
pass