def __call__(self, request, *args, **kwargs):
        try:
            obj = self.get_object(request, *args, **kwargs)
        except __HOLE__:
            raise Http404('Feed object does not exist.')
        feedgen = self.get_feed(obj, request)
        response = HttpResponse(mimetype=feedgen.mime_type)
        feedgen.write(response, 'utf-8')
        return response
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/contrib/syndication/views.py/Feed.__call__