class_docstr: Convenient base class for a singleton.
  
  It saves having to implement __eq__ and __hash__.
class_docstr_tok: ["Convenient","base","class","for","a","singleton",".","It","saves","having","to","implement","__eq__","and","__hash__","."]
code: def __str__(self):
      return self.__class__.__name__
  
imports: import hashlib
  import logging
  import os
  import struct
  import subprocess
  import sys
  from collections import OrderedDict
  from collections.abc import Callable
  from functools import partial
label_desc: Use image node_id 2 for calling the Singleton obj's underlying member method code with example usage: obj.__str__() and returns: self