code: def temp_dir(self):
      tempdir = tempfile.mkdtemp()
      tempdir = os.path.realpath(tempdir)
      self.addCleanup(lambda: os_helper.rmtree(tempdir))
      return tempdir
  
imports: import contextlib
  import os
  import os.path
  import subprocess
  import sys
  import tempfile
  import threading
  from textwrap import dedent
  import unittest
  from test import support
  from test.support import os_helper
  from test.support import interpreters
label_desc: Use image node_id 2 for calling the TestBase obj's underlying member method code with example usage: obj.temp_dir() and returns: tempdir