Alec Munro wrote:

I've tried it with PersistentDicts and PersistentMappings, and no luck.
It's very odd, I think there must be some fundamental step towards the
use of a mapping in Zope that I'm missing.
The fundamental step to provide persistency is to derive the target classes from persistent.Persistent. Like Tom Dossis suggested:


from persistent import Persistent
from persistent.dict import PersistentDict

class Demo(Persistent):
   def __init__(self):
       self.d = PersistentDict()

Regards,
Dominik
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