code: def __str__(self):
      return self.__message
  
file_path: DALI/dali/python/nvidia/dali/_autograph/pyct/error_utils.py
imports: import collections
  from nvidia.dali._autograph.pyct import origin_info
label_desc: Use image node_id 2 for calling the MultilineMessageKeyError obj's underlying member method code with example usage: obj.__str__() and returns: self