code: def __getitem__(self, item):
      feature = item
      if self.transform:
          feature = self.transform(item)
      return (feature, item)
  
imports: import pickle
  import unittest
  import unittest.mock
  import warnings
  import datasets
  import numpy
  import pytest
  import torch.utils.data
  from torchvision.transforms import Lambda
  from baal.active import ActiveLearningDataset
label_desc: Use image node_id 3 for calling the MyDataset obj's underlying member method code with example usage: obj.__getitem__(item) and returns: feature,  item