code: def tearDown(self):
      getpass.getpass = self._old_getpass
      urllib2.build_opener = self.old_opener
      super(RegisterTestCase, self).tearDown()
  
imports: import os
  import unittest
  import getpass
  import urllib2
  import warnings
  from test.test_support import check_warnings, run_unittest
  from distutils.command import register
  from distutils.command.register import register
  from distutils.errors import DistutilsSetupError
  from distutils.tests.test_config import PyPIRCCommandTestCase
label_desc: Use image node_id 2 for calling the RegisterTestCase obj's underlying member method code with example usage: obj.tearDown() without return types