code: def __init__(self):
      self.initialised = -1
      self.db = None
      self.dummy = False
  
imports: import peewee
  from threading import Lock
  import os
  import appdirs
  import atexit
  import datetime
  import pickle
  from .utils import get_yf_logger
label_desc: Use image node_id 1 to create a new _TzCache object  with example: obj = _TzCache()