code: def __call__(self, sample_info):
      return torch.tensor(
          super().__call__(sample_info), device=torch.device("cuda:0")
      )
  
file_path: DALI/dali/test/python/test_external_source_parallel_pytorch.py
imports: import numpy
  import torch
  import test_external_source_parallel_utils
  from nose_utils import raises
label_desc: Use image node_id 1 for calling the ExtCallbackTorchCuda obj's underlying member method code with example usage: obj.__call__(sample_info) and returns: torch