code: def __repr__(self):
      return "invalid json"
  
file_path: catboost/contrib/python/simplejson/py3/simplejson/tests/test_subclass.py
imports: from unittest import TestCase
  import simplejson
  from decimal import Decimal
label_desc: Use image node_id 1 for calling the AlternateFloat obj's underlying member method code with example usage: obj.__repr__() and returns: str