code: def init_ray_if_not(redis_address, redis_password):
      if not ray.is_initialized():
          init_params = dict(
              address=redis_address, ignore_reinit_error=True
          )
          if redis_password:
              init_params["_redis_password"] = redis_password
          if version.parse(ray.__version__) >= version.parse("1.4.0"):
              init_params["namespace"] = "az"
          ray.init(**init_params)
  
imports: from collections import defaultdict
  import ray
  import ray._private.services
  import uuid
  import random
  from packaging import version
  from zoo.orca.data import XShards
  from zoo.ray import RayContext
  import logging
label_desc: Use image node_id 1 for calling a global function with example usage: init_ray_if_not(redis_address, redis_password) without return types