[Python-3000] Immutable bytes type and dbm modules

[Nick Coghlan]

Martin v. Löwis wrote:
> I don't think it needs to be a separate type,
> instead, bytes objects could have a idem-potent
> .freeze() method which switches the "immutable"
> bit on. There would be no way to switch it off
> again.

+1 here - hashable byte sequences are very handy for dealing with 
fragments of low level serial protocols.

It would also be nice if b"" literals set that immutable flag 
automatically - otherwise converting some of my lookup tables over to 
Py3k would be a serious pain (not a pain I'm likely to have to deal with 
personally given the relative time frames involved, but a pain nonetheless).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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