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On Jan 29, 2009, at 6:40 PM, Guido van Rossum wrote:
On Thu, Jan 29, 2009 at 3:27 PM, Raymond Hettinger <pyt...@rcn.com>
wrote:
To get the ball rolling, I have a candidate for discussion.
Very late in the 3.0 process (after feature freeze), the bsddb code
was
ripped out (good riddance). This had the unfortunate side-effect of
crippling shelves which now fall back to using dumbdbm.
I'm somewhat working on an alternate dbm based on sqlite3:
http://code.activestate.com/recipes/576638/
It is a pure python module and probably will not be used directly,
but shelves
will see an immediate benefit (especially for large shelves) in
terms of speed
and space.
On the one hand, it is an API change or new feature because people
can
(if they choose) access the dbm directly. OTOH, it is basically a
performance fix for shelves whose API won't change at all. The
part that is visible
and incompatible is that 3.0.1 shelves won't be readable by 3.0.0.
That is too much for 3.0.1. It could affect external file formats
which strikes me as a bad idea.
Sounds like a good candidate for 3.1, which we should be expecting in
4-6 months I hope. Also you could try find shelve users (are there
any?) and recommend they install this as a 3rd party package, with the
expectation it'll be built into 3.1.
I concur.
Barry
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