Silence pylint on Mac OSX 10.6

tests/subprocess2_test.py

 #!/usr/bin/env python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Unit tests for subprocess2.py."""
 
 import logging
 import optparse
 import os
@@ skipping 107 matching lines @@
         'a': True,
     }
     self.assertEquals(expected, results)
 
   def test_Popen_defaults(self):
     results = self._fake_subprocess_Popen()
     proc = subprocess2.Popen(['foo'], a=True)
     # Cleanup code in subprocess.py needs this member to be set.
     # pylint: disable=W0201
     proc._child_created = None
-    # Since subprocess.Popen.__init__() is not called, proc.returncode shouldn't
-    # be present.
-    self.assertFalse(hasattr(proc, 'returncode'))
     expected = {
         'args': ['foo'],
         'a': True,
         'shell': bool(sys.platform=='win32'),
     }
     if sys.platform != 'win32':
       env = os.environ.copy()
       is_english = lambda name: env.get(name, 'en').startswith('en')
       if not is_english('LANG'):
         env['LANG'] = 'en_US.UTF-8'
@@ skipping 303 matching lines @@
   return options.return_value
 
 
 if __name__ == '__main__':
   logging.basicConfig(level=
       [logging.WARNING, logging.INFO, logging.DEBUG][
         min(2, sys.argv.count('-v'))])
   if len(sys.argv) > 1 and sys.argv[1] == '--child':
     sys.exit(child_main(sys.argv[2:]))
   unittest.main()