code: def test_stringify_key(self):
      for d in map(Decimal, self.NUMS):
          v = {d: d}
          self.assertEqual(
              self.loads(
                  self.dumps(v, use_decimal=True), parse_float=Decimal
              ),
              {str(d): d},
          )
  
file_path: catboost/contrib/python/simplejson/py2/simplejson/tests/test_decimal.py
imports: import decimal
  from decimal import Decimal
  from unittest import TestCase
  from simplejson.compat import StringIO, reload_module
  import simplejson
label_desc: Use image node_id 5 for calling the TestDecimal obj's underlying member method code with example usage: obj.test_stringify_key() without return types