prevtop

prevtop.py

def before_top_post(request):
        data = ''
        post_id = request.GET['post_id']
	post = Post.objects.get(id=post_id)
	posts = get_top_posts(request)
        cond = lambda p: p.id != post.id
        before_matched = itertools.takewhile(cond, posts)
        skip = sum(itertools.imap(cond, before_matched))
        if skip > 0:
            matched = next(itertools.islice(posts, skip-1, None), None)
        else:
            matched = None
	arrows = get_top_arrows(matched)
	next_post = profile_post_to_html(request,matched,'top')
	data = {'post':next_post, 'arrows':arrows}
	return HttpResponse(json.dumps(data), mimetype="application/json")