PyDbLite (small footprint untyped database engine in python)

PyDbLite is a pure-Python in-memory database engine, using 
Python list comprehensions as query language instead of SQL,
which stores data in a cPickled file.

You can also use PyDbLite with MySQL and SQLite, as backends.
In order to use MySQL's adapter  you will need MySQL-python 
(available on SlackBuilds.org).
