code: def test_verify_str_arg(self):
      assert "a" == utils.verify_str_arg("a", "arg", ("a",))
      pytest.raises(ValueError, utils.verify_str_arg, 0, ("a",), "arg")
      pytest.raises(
          ValueError, utils.verify_str_arg, "b", ("a",), "arg"
      )
  
imports: import contextlib
  import gzip
  import os
  import pathlib
  import re
  import tarfile
  import zipfile
  import pytest
  import torch
  import torchvision.datasets.utils
  from common_utils import assert_equal
  from torch._utils_internal import get_file_path_2
  from torchvision.datasets.folder import make_dataset
  from torchvision.datasets.utils import _COMPRESSED_FILE_OPENERS
label_desc: Use image node_id 15 for calling the TestDatasetsUtils obj's underlying member method code with example usage: obj.test_verify_str_arg() without return types