Simple django templatetag for menu items

menu.py

# -*- coding: utf-8 -*-
"""
Templatetag to be used in Django templates along with Twitter bootstrap CSS
library.

To make it work you must make sure that settings.py file contains a line like
this:

TEMPLATE_CONTEXT_PROCESSORS = (
    ...
    'django.core.context_processors.request'
)

And then add to your template:

<div class="navbar">
    <div class="navbar-inner">
        <div class="container">
            <ul class="nav">
                {% menuitem "/foo/" "Foo Item" %}
                {% menuitem "/bar/" "Bar Item" %}
            </ul>
        </div>
    </div>
</div>
"""
from django import template
from django.utils.html import conditional_escape as esc
from django.utils.safestring import mark_safe

register = template.Library()


@register.simple_tag(takes_context=True)
def menuitem(context, url, title):
    request = context['request']
    class_attr = ''
    print request.path, url, request.path == url
    if request.path == url:
        class_attr = ' class="active"'
    template =  u'<li{class_attr}><a href="{url}">{title}</a></li>'
    return mark_safe(template.format(url=esc(url), title=esc(title), class_attr=class_attr))