[Python-Dev] Pronouncement needed in issue9675 (original) (raw)

David Malcolm dmalcolm at redhat.com
Tue Sep 28 17🔞24 CEST 2010

On Tue, 2010-09-28 at 04:44 +0200, Jesus Cea wrote:

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http://bugs.python.org/issue9675 Long history sort: Python 2.7 backported Capsule support and (incorrectly, in my opinion) marked CObject as deprecated. All C modules in the stdlib were updated to Capsule (with a CObject compatibility layer), except BSDDB, because this change was done late in the cycle, the proposed patch was buggy (solvable) and a pronouncement was done that CObject was not actually deprecated. But in python 2.7 release, CObject is marked as deprecated (arg!), so when executing python with -We (mark warnings as errors), bsddb fails. Since I think that adopting Capsule in BSDDB for 2.7.1 would break the API compatibility (maybe the CObject proxy would solve this), and since a previous pronouncement was done abour CObject not-deprecated in 2.7.x, I would like comments. Long history and links to previous pronouncements in http://bugs.python.org/issue9675 My proposal: CObject should not be marked as deprecated in 2.7.1.

This breaks quite a few third-party modules, some with segfaults; we (as in Fedora) ran into this building with 2.7 as the standard /usr/bin/python for Fedora 14.

We fixed some of them, but are advising people not to turn on warnings as errors in our release notes [1]

See this tracker bug for a survey of the gory details: https://bugzilla.redhat.com/showdependencytree.cgi?id=620842&hide_resolved=0

The list includes SWIG, numpy, and the GTK stack.

I'd be more than happy to patch Fedora's python builds to remove the deprecation warning, but I don't want to stray too far from python.org's "official" behavior here.

So, I'm +1 on removing this deprecation warning in 2.7, FWIW (though I'm not a committer yet)

Hope this is helpful Dave [1] https://fedoraproject.org/wiki/Features/Python_2.7#Caveat:_PyCObject_and_warnings

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