On Jul 5, 2006, at 7:59 PM, Patrick K. O'Brien wrote:

>
> I have one idea.  Instead of PersistentDict.data being a dict, it
> could
> be a subclass of dict.  Then __setstate__ could test the incoming
> state
> to see if it is a regular dict or our special subclass.  But that
> would
> trade off physical disk savings against type inspection within
> __setstate__, which gets called a lot.  I'm not sure that would be
> worthwhile.  The alternative would be a one-time conversion routine.
> Unless you think of something better.

It does not help PersistentSet or PersistentList as your idea does,
but it might be possible to make PersistentDict use the actual __dict__
value as the dict instead of wrapping another dict instance.

I think I remember trying to make PersistentDict be a dict as you
suggest here, and I felt like it was getting difficult to understand.