code: def __init__(self, host: Optional[str], port: Optional[int]) -> None:
      if not hasattr(self, "_redis_client"):
          host = host or "localhost"
          port = port or 6379
          self._redis_client = redis.Redis(host=host, port=port)
  
imports: import functools
  import os
  from logging import getLogger
  from typing import Callable, NamedTuple, Optional
  import redis
  from apscheduler.schedulers.background import BackgroundScheduler
label_desc: Use image node_id 2 to create a new RedisClient object  with example: obj = RedisClient(host, port)