code: def __iter__(self):
      end = self.__end
      curr = end[2]
      while curr is not end:
          yield curr[0]
          curr = curr[2]
  
file_path: catboost/contrib/python/simplejson/py3/simplejson/ordered_dict.py
imports: from UserDict import DictMixin
label_desc: Use image node_id 5 for calling the OrderedDict obj's underlying member method code with example usage: obj.__iter__() without return types