HTTPError text

`Traceback (most recent call last):

File "/launchpad/m37_002/launchpad/ENV/lib/python2.7/site-packages/django/core/handlers/base.py", line 112, in get_response response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/launchpad/current/launchpad/lp/ui/views.py", line 538, in search except HTTPError as error:

NameError: global name 'HTTPError' is not defined

<WSGIRequest path:/search, GET:<QueryDict: {u'q': [u'Frege and second order logic'], u'page': [u'1'], u'page_size': [u'9'], u'format': [u'json']}>, POST:<QueryDict: {}>, COOKIES:{}, META:{u'CSRF_COOKIE': u'eYOT6mh7zlEdRP6eetp7y9ctor2UP7Fi', 'DOCUMENT_ROOT': '/etc/apache2/htdocs', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTP_ACCEPT': '/', 'HTTP_ACCEPT_ENCODING': 'gzip, deflate', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_HOST': 'findit.library.gwu.edu', 'HTTP_USER_AGENT': 'python-requests/2.5.1 CPython/2.7.3 Linux/3.2.0-75-generic', 'PATH_INFO': u'/search', 'PATH_TRANSLATED': '/launchpad/current/launchpad/lp/lp/wsgi.py/search', 'QUERY_STRING': 'q=Frege+and+second+order+logic&page=1&page_size=9&format=json', 'REMOTE_ADDR': '198.91.36.119', 'REMOTE_HOST': 'gwbento-prod.wrlc.org', 'REMOTE_PORT': '45021', 'REQUEST_METHOD': 'GET', 'REQUEST_URI': '/search?q=Frege+and+second+order+logic&page=1&page_size=9&format=json', 'SCRIPT_FILENAME': '/launchpad/current/launchpad/lp/lp/wsgi.py', 'SCRIPT_NAME': u'', 'SERVER_ADDR': '192.245.136.24', 'SERVER_ADMIN': 'gwlib-root@groups.gwu.edu', 'SERVER_NAME': 'findit.library.gwu.edu', 'SERVER_PORT': '80', 'SERVER_PROTOCOL': 'HTTP/1.1', 'SERVER_SIGNATURE': '

Apache/2.2.22 (Ubuntu) Server at findit.library.gwu.edu Port 80

\n', 'SERVER_SOFTWARE': 'Apache/2.2.22 (Ubuntu)', 'force-proxy-request-1.0': '1', 'mod_wsgi.application_group': 'findit.library.gwu.edu|', 'mod_wsgi.callable_object': 'application', 'mod_wsgi.handler_script': '', 'mod_wsgi.input_chunked': '0', 'mod_wsgi.listener_host': '', 'mod_wsgi.listener_port': '80', 'mod_wsgi.process_group': 'findit.library.gwu.edu', 'mod_wsgi.request_handler': 'wsgi-script', 'mod_wsgi.script_reloading': '1', 'mod_wsgi.version': (3, 3), 'proxy-nokeepalive': '1', 'wsgi.errors': <mod_wsgi.Log object at 0x7f48d3c4e9f0>, 'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7f48cb775468>, 'wsgi.input': <mod_wsgi.Input object at 0x7f48d3c4ecb0>,`