code: def init_dataset(self, val_targets, data_dir, image_size):
      for name in val_targets:
          path = os.path.join(data_dir, name + ".bin")
          if os.path.exists(path):
              data_set = verification.load_bin(path, image_size)
              self.ver_list.append(data_set)
              self.ver_name_list.append(name)
  
imports: import logging
  import os
  import sys
  import time
  import horovod.mxnet
  import mxnet
  from mxboard import SummaryWriter
  from mxnet import nd
  from default import config
  from evaluation import verification
label_desc: Use image node_id 3 for calling the CallBackVertification obj's underlying member method code with example usage: obj.init_dataset(val_targets, data_dir, image_size) without return types