Yes. My idea is to port the python code as-is, using "2to3", and update
the C code with conditional compilation, to keep a single codebase.

I'm having issues with the compatibility. In particular, my code has the
following line:

"""
staticforward PyTypeObject DB_Type, DBCursor_Type, DBEnv_Type,
DBTxn_Type, DBLock_Type;
"""

Compiling this code fails with the following error (when compiling
against Python 3.0):

"""
Modules/_bsddb.c:241: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'PyTypeObject'
"""

Compiling the same code against Python 2.x, works.

Ideas welcomed :).