>   def _exitfunc (self):
>       for db in ObjectDatabase._instances:
>           db.close_database()
>
>   atexit.register(_exitfunc, ())
>
> where ObjectDatabase is a class that manages a connection to a ZODB
> database; ObjectDatabase._instances is a class attribute that,
> presumably, tracks existing ObjectDatabase instances.  So we don't ever
> worry about explicitly closing our ZODB.

I guess the problem boils down to the fact that I'm surprised that ZODB
databases don't self-close on deletion.  I know it's not really a
quixote question, but I figured I'd ask anyway. =)

On a related topic -- how do you manage concurrent accesses to ZODB
databases in your main app?

--david