class_docstr: a util class to load and save config
class_docstr_tok: ["a","util","class","to","load","and","save","config"]
code: def __init__(self, experiment_id: str, log_dir: str):
      self.experiment_id = experiment_id
      self.conn = sqlite3.connect(
          os.path.join(log_dir, experiment_id, "db", "nni.sqlite")
      )
      self.refresh_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 1 to create a new Config object  with example: obj = Config(experiment_id, log_dir)