code: def __call__(self, label):
      return self.label2classname[label]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import os
  import sys
  import pathlib
  from torch.utils.data.dataset import Subset
  import numpy
  import torch
  import torchvision.transforms
  import torchvision.datasets
  from advertorch.test_utils import LeNet5
label_desc: Use image node_id 3 for calling the ImageNetClassNameLookup obj's underlying member method code with example usage: obj.__call__(label) and returns: self