code: def __str__(self):
      return f"@@{self.name}@@"
  
imports: import os, sys, json, re
  import tempfile
  import copy
  import inspect
  import logging
  import importlib
  from .None import solver
  from .None import patterns
label_desc: Use image node_id 4 for calling the Custom obj's underlying member method code with example usage: obj.__str__() and returns: str, self, str