What are the viable database abstraction layers for Python

Question

I\'m starting to get involved in an open source project Gramps which is exploring switching their backend from BSDDB to a relational database. Either SQLite or MySQL we have

Answer 1

When I started converting a legacy app to use an ORM I looked into SQLObject and SQLAlchemy. At first I went with SQLObject because it looked familiar (past Django experience) and SQLAlchemy seemed complicated. After about 2 hours I started to hit walls with SQLObject. I then looked at SQLAlchemy again and was instantly rewarded. Not only did it understand and map every weird table in the database, it even could do the even weirder lookups I had to do later!