def test_defaultdict_clone(self):
d = defaultdict(lambda key, d: d['a'], {'a': 'default'})
self.assertEqual('default', d['abc'])
d = defaultdict(lambda key, d: d[key])
with self.assertRaises(KeyError):
d['abc']
def test_defaultdict(self):
d = defaultdict(lambda key, _: 'a')
self.assertEqual('a', d['abc'])
d['abc'] = 1
self.assertEqual(1, d['abc'])
