class_docstr: SQLite3 TaskRecord backend.
code: def close(self):
      self._commit_callback.stop()
      self._db.commit()
      self._db.close()
  
imports: import json
  import os
  from datetime import datetime
  from dateutil.parser import parse
  from tornado import ioloop
  from traitlets import Dict, Instance, List, Unicode
  from ..util import ensure_timezone, extract_dates
  from .dictdb import BaseDB
label_desc: Use image node_id 2 for calling the SQLiteDB obj's underlying member method code with example usage: obj.close() without return types