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 __getattr__(self, key):
      try:
          value = super(Config, self).__getitem__(key)
          return value
      except KeyError:
          raise AttributeError(key)
  
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 3 for calling the Config obj's underlying member method code with example usage: obj.__getattr__(key) and returns: value