Issue 6637: defaultdict.copy() failed with an empty factory.
diff --git a/Lib/test/test_defaultdict.py b/Lib/test/test_defaultdict.py
index 35468b4..e5a9bd5 100644
--- a/Lib/test/test_defaultdict.py
+++ b/Lib/test/test_defaultdict.py
@@ -60,6 +60,7 @@
d1 = defaultdict()
self.assertEqual(d1.default_factory, None)
self.assertEqual(repr(d1), "defaultdict(None, {})")
+ self.assertEqual(eval(repr(d1)), d1)
d1[11] = 41
self.assertEqual(repr(d1), "defaultdict(None, {11: 41})")
d2 = defaultdict(int)
@@ -112,6 +113,12 @@
d4[12]
self.assertEqual(d4, {42: [], 12: []})
+ # Issue 6637: Copy fails for empty default dict
+ d = defaultdict()
+ d['a'] = 42
+ e = d.copy()
+ self.assertEqual(e['a'], 42)
+
def test_shallow_copy(self):
d1 = defaultdict(foobar, {1: 1})
d2 = copy.copy(d1)