code: def _parse_meta(filename, cifar_classnum):
      with open(filename, "rb") as f:
          obj = pickle.load(f)
          return obj[
              "label_names"
              if cifar_classnum == 10
              else "fine_label_names"
          ]
  
imports: import numpy
  import os
  import pickle
  import tarfile
  from ...utils import logger
  from ...utils.fs import download, get_dataset_path
  from ..base import RNGDataFlow
label_desc: Use image node_id 4 for calling a global function with example usage: _parse_meta(filename, cifar_classnum) and returns: obj