Mike Orr wrote:
>
> There's no reason the root class has to be a PersistentDict.
> PersistentDict could be made slotted, and the root object a special
> subclass that supports attribute assignment.

Yes and no.  The problem is pickles.  Python stores the class.__module__
and class.__name__ as part of the pickle.  So any existing Durus
databases will be stuck with PersistentDict (or would require a
conversion) if Durus wanted to allow something other than a
PersistentDict instance as the root.  So it wouldn't be impossible, but
in many ways it is simpler for Durus to only have one kind of root.

--
Patrick K. O'Brien
Orbtech       http://www.orbtech.com
Schevo        http://www.schevo.org
Louie         http://www.pylouie.org