multiple databases, what's the best interface ?

[Stef Mientki]

hello,

I need to switch fluently between 2 or 3 types of dbases:
SQLite, Sybase ( and in the future MS SQL-server).

I need both closed application and general purpose database manager,
which should run on different platforms (windows, windows mobile, not 
web based).

I would like to write the applications in Python.
What's the best interface so I can use the same program for all databases,
and just have to change the database name, if I want to use another 
database ?

thanks,
Stef Mientki