babel extract

lineno=567
messages=(u'\\"', u'"')
keywords={'N_': None,
 '_': None,
 'dgettext': (2,),
 'dngettext': (2, 3),
 'gettext': None,
 'gettext_lazy': None,
 'gettext_noop': None,
 'ngettext': (1, 2),
 'ngettext_lazy': (1, 2),
 'ugettext': None,
 'ugettext_lazy': None,
 'ugettext_noop': None,
 'ungettext': (1, 2),
 'ungettext_lazy': (1, 2)}
funcname='_'
None
Traceback (most recent call last):
  File "/usr/bin/pybabel", line 7, in ?
    sys.exit(
  File "/home/ramiro/src/babel/trunk/babel/messages/frontend.py", line 1026, in main
    return CommandLineInterface().run(sys.argv)
  File "/home/ramiro/src/babel/trunk/babel/messages/frontend.py", line 621, in run
    return getattr(self, cmdname)(args[1:])
  File "/home/ramiro/src/babel/trunk/babel/messages/frontend.py", line 836, in extract
    for filename, lineno, message, comments in extracted:
  File "/home/ramiro/src/babel/trunk/babel/messages/extract.py", line 149, in extract_from_dir
    options=options):
  File "/home/ramiro/src/babel/trunk/babel/messages/extract.py", line 175, in extract_from_file
    return list(extract(method, fileobj, keywords, comment_tags, options))
  File "/home/ramiro/src/babel/trunk/babel/messages/extract.py", line 229, in extract
    for index in keywords[funcname]:
TypeError: iteration over non-sequence
ramiro@repo:~/src/django-babel$ vim ~/src/django/trunk/django/template/__init__.py