code: def test_single_tensor(self):
      tensor = convert_pandas_to_torch_tensor(data_batch)
      assert tensor.size() == (len(data_batch), len(data_batch.columns))
      assert np.array_equal(tensor.numpy(), data_batch.to_numpy())
  
file_path: ray/python/ray/train/tests/test_torch_utils.py
imports: import numpy
  import pandas
  import pytest
  import torch
  from ray.air._internal.torch_utils import contains_tensor, convert_pandas_to_torch_tensor, load_torch_model
  from ray.util.debug import _test_some_code_for_memory_leaks
label_desc: Use image node_id 2 for calling the TestConvertPandasToTorch obj's underlying member method code with example usage: obj.test_single_tensor() without return types