code: def setUp(self):
      test_dir = os.path.dirname(__file__)
      # project_test_dir = BigDL/python/nano
      project_test_dir = os.path.abspath(
          os.path.join(test_dir, "..", "..", "..", "..", "..")
      )
      os.environ["PYTHONPATH"] = project_test_dir
  
imports: import os
  import math
  import platform
  import pytest
  from unittest import TestCase
  import torch
  from torch import nn
  from torch.utils.data import DataLoader, TensorDataset
  from test.pytorch.utils._train_torch_lightning import create_data_loader, data_transform
  from bigdl.nano.pytorch import TorchNano
  from bigdl.nano.pytorch.vision.models import vision
label_desc: Use image node_id 1 for calling the TestLite obj's underlying member method code with example usage: obj.setUp() without return types