Unfortunately, test_bsddb3 has lots of problems. :-(  They vary by platform and version of bsddb used.

Given the current code works, I'm not sure it's worth spending time cleaning this up.  Especially since I plan to move this code to C.  It might be worthwhile to separate out the warning guard.  I can't remember if the __warningregistry__ was mucked with in multiple places.  If it's only used in the one place, I'm not sure that's worth it either.

Learning import is a test of manhood. :-)