code: def setUp(self):
      self._default_handler = signal.getsignal(signal.SIGINT)
      if self.int_handler is not None:
          signal.signal(signal.SIGINT, self.int_handler)
  
imports: import gc
  import os
  import sys
  import signal
  import weakref
  from cStringIO import StringIO
  import unittest
label_desc: Use image node_id 1 for calling the TestBreak obj's underlying member method code with example usage: obj.setUp() without return types