def render_to template def renderer func def wrapper request args kw o

def render_to(template):
    def renderer(func):
        def wrapper(request, *args, **kw):
            output = func(request, *args, **kw)
            if isinstance(output, (list, tuple)):
                return render_to_response(output[1], output[0], RequestContext(request))
            elif isinstance(output, dict):
                return render_to_response(template, output, RequestContext(request))
            return output
        return wrapper
    return renderer

@render_to(index.html)
def index(request):
    catalogs = Catalog.objects.all()
    return {'catalogs': catalogs,
           'top':Product.objects.filter(in_top=True),
           'user':request.user,}