Hm. For reading stuff, this looks simply like a normal orm-like wrapper around a sql library (edit: SQLAlchemy it is).

For writing on the other hand, this has the wonderful side-effect of doing schema changes on the fly, like adding some new columns to a table because one new record has that field.

I know it's not meant to be used that way, but inevitably this will be used against large existing databases (used inside some company for example), and then those side-effects will show up and make a lot of people very happy I guess.