class_docstr: a util class to load and save config
class_docstr_tok: ["a","util","class","to","load","and","save","config"]
docstr: get a value according to key
docstr_tok: ["get","a","value","according","to","key"]
code: def get_config(self):
      """get a value according to key"""
      return self.config
  
file_path: nni/nni/tools/nnictl/config_utils.py
imports: import os
  import sqlite3
  import nni
  from .constants import NNI_HOME_DIR
  from .common_utils import get_file_lock
label_desc: Use image node_id 3 for calling the Config obj's underlying member method code with example usage: obj.get_config() and returns: self