Traceback (most recent call last):
  File "/home/user/myproject/myprojectenv/local/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/home/user/myproject/myprojectenv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/user/myproject/myprojectenv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/user/myproject/myprojectenv/local/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/user/myproject/polls/views.py", line 352, in stats
    'obj.date_diff':obj[0].date_diff,
  File "/home/user/myproject/polls/models.py", line 12, in date_diff
    return datetime.datetime.now()-self.date
TypeError: can't subtract offset-naive and offset-aware datetimes