code: def test_item_sort_key_value(self):
      # https://github.com/simplejson/simplejson/issues/173
      a = {"a": 1, "b": 0}
      self.assertEqual(
          '{"b": 0, "a": 1}',
          json.dumps(a, item_sort_key=lambda kv: kv[1]),
      )
  
file_path: catboost/contrib/python/simplejson/py3/simplejson/tests/test_item_sort_key.py
imports: from unittest import TestCase
  import simplejson
  from operator import itemgetter
label_desc: Use image node_id 3 for calling the TestItemSortKey obj's underlying member method code with example usage: obj.test_item_sort_key_value() without return types