class_docstr: This is a wrapper class for dict objects so that values of which can be
  accessed as attributes.
  
  Args:
      config (dict): The dict object to be wrapped.
code: def _add_item(self, key, value):
      if isinstance(value, dict):
          self.__setattr__(key, Config(value))
      else:
          self.__setattr__(key, value)
  
file_path: colossalai/colossalai/context/config.py
imports: import inspect
  import sys
  from importlib.machinery import SourceFileLoader
  from pathlib import Path
  from colossalai.logging import get_dist_logger
label_desc: Use image node_id 5 for calling the Config obj's underlying member method code with example usage: obj._add_item(key, value) without return types