test_shelve.py 文件源码

def test_mutable_entry(self):
        d1 = {}
        s = shelve.Shelf(d1, protocol=2, writeback=False)
        s['key1'] = [1,2,3,4]
        self.assertEqual(s['key1'], [1,2,3,4])
        s['key1'].append(5)
        self.assertEqual(s['key1'], [1,2,3,4])
        s.close()

        d2 = {}
        s = shelve.Shelf(d2, protocol=2, writeback=True)
        s['key1'] = [1,2,3,4]
        self.assertEqual(s['key1'], [1,2,3,4])
        s['key1'].append(5)
        self.assertEqual(s['key1'], [1,2,3,4,5])
        s.close()

        self.assertEqual(len(d1), 1)
        self.assertEqual(len(d2), 1)