code: def test_extract_tar(self, extension, mode, tmpdir, use_pathlib):
      def create_archive(
          root, extension, mode, content="this is the content"
      ):
          src = os.path.join(root, "src.txt")
          dst = os.path.join(root, "dst.txt")
          archive = os.path.join(root, f"archive{extension}")
  
          with open(src, "w") as fh:
              fh.write(content)
  
          with tarfile.open(archive, mode=mode) as fh:
              fh.add(src, arcname=os.path.basename(dst))
  
          return archive, dst, content
  
      if use_pathlib:
          tmpdir = pathlib.Path(tmpdir)
      archive, file, content = create_archive(tmpdir, extension, mode)
  
      utils.extract_archive(archive, tmpdir)
  
      assert os.path.exists(file)
  
      with open(file) as fh:
          assert fh.read() == content
  
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 14 for calling the TestDatasetsUtils obj's underlying member method code with example usage: obj.test_extract_tar(extension, mode, tmpdir, use_pathlib) and returns: archive,  dst,  content