Django-text-search is a project mainly written in Python, it's free.
Django full text search module, written purely in Python, using the power of regular expressions, and is fully compatible with Google App Engine server
A Django full text search module, written purely in Python, using the power of regular expressions, and is fully compatible with Google App Engine server.
For instructions on how to use this in your Django project, or django-nonrel powered GAE project, please check http://scratch-blog.appspot.com/blog/2010/09/04/django-full-text-search-purely-python