I am the maintainer of Berkeley DB python bindings, "pybsddb": http://www.jcea.es/programacion/pybsddb.htm

If I recall correctly, Berkeley DB license is something like this:

1. Your code must be open source, if you distribute the programs to others. You can write a program for your business, for instance, and don't care about licensing, if it used internally only.

OR

2. You have to pay a license to Oracle.

Choose one.

I could be mistaken...