code: def __init__(self, rank, size):
      self.rank = rank
      self.size = size
  
imports: import logging
  import json
  import os
  import numpy
  import ray
  from contextlib import closing
  import logging
  import socket
  from zoo.orca.data.utils import ray_partitions_get_data_label
label_desc: Use image node_id 1 to create a new DatasetHandler object  with example: obj = DatasetHandler(rank, size)