There's a review of 'Data Crunching' by Greg Wilson over at TechBookReport. This is not a teach-yourself Python book but one that uses Python to solve various common data-related tasks with regular expressions, XML, SQL and so on.
The review is here: http://www.techbookreport.com/tbr0172.html -- TechBookReport - Programming http://www.techbookreport.com/ProgIndex.html -- http://mail.python.org/mailman/listinfo/python-list