class_docstr: Implementation of Config class for model configure.
  
  Args:
      config_file(str): configure filename, which is a yaml file.
      isCreate(bool): if true, create some neccessary directories to save models, log file and other outputs.
      isSave(bool): if true, save config_file in order to record the configure message.
docstr: Return the configure dict
docstr_tok: ["Return","the","configure","dict"]
code: def __getitem__(self, key):
      """Return the configure dict"""
      return self.config[key]
  
file_path: PGL/legacy/examples/GATNE/utils.py
imports: import datetime
  import os
  import yaml
  import random
  import shutil
label_desc: Use image node_id 6 for calling the Config obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self