Human readable date diff filter for python (and Django)

This snippet display a human readable date differential for feed update like twitter or facebook. You give it the your date in parameter a fuzzy diff with datetime.datetime.now() is returned.

Usage:

{{ status.created_at|fuzzy_date }}

Will give something like:

just now
13 minutes ago
1 hour ago
in 1 week

To test the filter:

python tests.py

I proposed the code to be included in Django: Django ticket 13541.

The use of javascript instead of python is an open discussion.