def METHOD_NAME(self):
    root = pyhit.load(os.path.join('..', '..', 'test_files', 'test.hit'))
    self.assertEqual(len(root(1)), 2)
    self.assertIsNone(root(1).get('year'))
    root(1)['year'] = 1980
    self.assertEqual(len(root(1)), 2)
    self.assertEqual(root(1).get('year'), 1980)