code: def testRemoveHandler(self):
      default_handler = signal.getsignal(signal.SIGINT)
      unittest.installHandler()
      unittest.removeHandler()
      self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)
  
      # check that calling removeHandler multiple times has no ill-effect
      unittest.removeHandler()
      self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)
  
imports: import gc
  import os
  import sys
  import signal
  import weakref
  from cStringIO import StringIO
  import unittest
label_desc: Use image node_id 13 for calling the TestBreak obj's underlying member method code with example usage: obj.testRemoveHandler() without return types