[Python-3000] Immutable bytes type and dbm modules

[Ron Adam]

Martin v. Löwis wrote:
> Jason Orendorff schrieb:
>> On 8/7/07, "Martin v. Löwis" <martin at v.loewis.de> wrote:
>>> My concern is that people need to access existing databases. It's
>>> all fine that the code accessing them breaks, and that they have
>>> to actively port to Py3k. However, telling them that they have to
>>> represent the keys in their dbm disk files in a different manner
>>> might cause a revolt...
>> Too true.  Offhand, why not provide hooks for serializing and
>> deserializing keys? 
> 
> Perhaps YAGNI? We already support pickling values (dbshelve),
> and I added support for encoding/decoding strings as either
> keys or values (though in a limited manner).
> 
> In any case, somebody would have to make a specification
> for that, and then somebody would have to provide an
> implementation of it.
> 
> Regards,
> Martin

Just a thought...

Would some sort of an indirect reference type help.  Possibly an 
object_id_based_reference as keys instead of using or hashing the object 
itself?  This wouldn't change if the object mutates between accesses and 
could be immutable.

Ron