[Python-Dev] Python 3.0.1 (original) (raw)

Guido van Rossum guido at python.org
Fri Jan 30 05:11:02 CET 2009

On Thu, Jan 29, 2009 at 4:58 PM, Raymond Hettinger <python at rcn.com> wrote:

A couple additional thoughts FWIW:

* whichdb() selects from multiple file formats, so 3.0.1 would still be able to read 3.0.0 files. It is the 2.x shelves that won't be readable at all under any scenario. * If you're thinking that shelves have very few users and that 3.0.0 has had few adopters, doesn't that mitigate the effects of making a better format available in 3.0.1? Wouldn't this be the time to do it? * The file format itself is not new or unreadable by 3.0.0. It is just a plain sqlite3 file. Was is new is the ability of shelve's to call sqlite. To me, that is something a little different than changing a pickle protocol or somesuch.

Sorry, not convinced. This is a change of a different scale than removing stuff that should've been removed. I understand you'd like to see your baby released. But I think it's better to have it tried and tested by others outside the core distro first. dbm is not broken in 3.0, just slow. Well so be it, io.py is too and that's a lot more serious. I also note that on some systems at least ndbm and/or gdbm are supported.

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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