code: def __init__(self, cache_actor_handle, put_threshold=10):
      self.cache_actor = cache_actor_handle
      self.put_threshold = put_threshold
  
imports: import ray
  import dask.array
  from ray.util.dask import RayDaskCallback, ray_dask_get
  from timeit import default_timer
label_desc: Use image node_id 1 to create a new SimpleCacheCallback object from inherited base classes: RayDaskCallback with example: obj = SimpleCacheCallback(cache_actor_handle, put_threshold)