code: def setUp(self):
      self.dirname = tempfile.mkdtemp()
      self.addCleanup(shutil.rmtree, self.dirname)
      sys.path.insert(0, self.dirname)
  
imports: from pathlib import Path
  from test.support.import_helper import unload, CleanImport
  from test.support.warnings_helper import check_warnings, ignore_warnings
  import unittest
  import sys
  import importlib
  from importlib.util import spec_from_file_location
  import pkgutil
  import os
  import os.path
  import tempfile
  import shutil
  import zipfile
label_desc: Use image node_id 1 for calling the PkgutilTests obj's underlying member method code with example usage: obj.setUp() without return types