old_contents: import traceback
  
  from nose2 import events
  from nose2.compat import unittest
  
  
  class PluggableTestLoader(object):
      """Test loader that defers all loading to plugins"""
  
      suiteClass = unittest.TestSuite
  
      def __init__(self, session):
          self.session = session
  
      def loadTestsFromModule(self, module, use_load_tests=False):
          evt = events.LoadFromModuleEvent(self, module, use_load_tests)
          result = self.session.hooks.loadTestsFromModule(evt)
          if evt.handled:
              suite = result or self.suiteClass()
              return suite
          return self.suiteClass(evt.extraTests)
  
      def loadTestsFromNames(self, testNames, module=None):
          event = events.LoadFromNamesEvent(
              self, testNames,module)
          result = self.session.hooks.loadTestsFromNames(event)
          if event.handled:
              suites = result or []
          else:
              suites = [self.loadTestsFromName(name, module)
                        for name in event.names]
          if event.extraTests:
              suites.extend(event.extraTests)
          return self.suiteClass(suites)
  
      def loadTestsFromName(self, name, module=None):
          event = events.LoadFromNameEvent(self, name, module)
          result = self.session.hooks.loadTestsFromName(event)
          if event.handled:
              suite = result or self.suiteClass()
              return suite
          return self.suiteClass(event.extraTests)
  
      def failedImport(self, name):
          message = 'Failed to import test module: %s' % name
          if hasattr(traceback, 'format_exc'):
              # Python 2.3 compatibility
              # format_exc returns two frames of discover.py as well
              message += '\n%s' % traceback.format_exc()
          print message
          return self._makeFailedTest(
              'ModuleImportFailure', name, ImportError(message))
  
      def failedLoadTests(self, name, exception):
          return self._makeFailedTest('LoadTestsFailure', name, exception)
  
      def _makeFailedTest(self, classname, methodname, exception):
          def testFailure(self):
              raise exception
          attrs = {methodname: testFailure}
          TestClass = type(classname, (unittest.TestCase,), attrs)
          return self.suiteClass((TestClass(methodname),))
  
new_contents: import traceback
  
  from nose2 import events
  from nose2.compat import unittest
  
  
  class PluggableTestLoader(object):
      """Test loader that defers all loading to plugins"""
  
      suiteClass = unittest.TestSuite
  
      def __init__(self, session):
          self.session = session
  
      def loadTestsFromModule(self, module, use_load_tests=False):
          evt = events.LoadFromModuleEvent(self, module, use_load_tests)
          result = self.session.hooks.loadTestsFromModule(evt)
          if evt.handled:
              suite = result or self.suiteClass()
              return suite
          return self.suiteClass(evt.extraTests)
  
      def loadTestsFromNames(self, testNames, module=None):
          event = events.LoadFromNamesEvent(
              self, testNames,module)
          result = self.session.hooks.loadTestsFromNames(event)
          if event.handled:
              suites = result or []
          else:
              suites = [self.loadTestsFromName(name, module)
                        for name in event.names]
          if event.extraTests:
              suites.extend(event.extraTests)
          return self.suiteClass(suites)
  
      def loadTestsFromName(self, name, module=None):
          event = events.LoadFromNameEvent(self, name, module)
          result = self.session.hooks.loadTestsFromName(event)
          if event.handled:
              suite = result or self.suiteClass()
              return suite
          return self.suiteClass(event.extraTests)
  
      def failedImport(self, name):
          message = 'Failed to import test module: %s' % name
          if hasattr(traceback, 'format_exc'):
              # Python 2.3 compatibility
              # format_exc returns two frames of discover.py as well
              message += '\n%s' % traceback.format_exc()
          return self._makeFailedTest(
              'ModuleImportFailure', name, ImportError(message))
  
      def failedLoadTests(self, name, exception):
          return self._makeFailedTest('LoadTestsFailure', name, exception)
  
      def _makeFailedTest(self, classname, methodname, exception):
          def testFailure(self):
              raise exception
          attrs = {methodname: testFailure}
          TestClass = type(classname, (unittest.TestCase,), attrs)
          return self.suiteClass((TestClass(methodname),))
  
subject: Remove debug print