code: def tearDown(self):
      signal.signal(signal.SIGINT, self._default_handler)
      unittest.signals._results = weakref.WeakKeyDictionary()
      unittest.signals._interrupt_handler = None
  
imports: import gc
  import os
  import sys
  import signal
  import weakref
  from cStringIO import StringIO
  import unittest
label_desc: Use image node_id 2 for calling the TestBreak obj's underlying member method code with example usage: obj.tearDown() without return types