Mailman 3 August 2013 - Python-Dev

Re: [Python-Dev] cpython: Use a known unique object for the dummy entry.
by Antoine Pitrou Aug. 19, 2013

Aug. 19, 2013

On Sat, 17 Aug 2013 11:32:00 +0200 (CEST) raymond.hettinger <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/2c9a2b588a89 > changeset: 85218:2c9a2b588a89 > user: Raymond Hettinger <python(a)rcn.com> > date: Sat Aug 17 02:31:53 2013 -0700 > summary: > Use a known unique object for the dummy entry. > > This lets us run PyObject_RichCompareBool() without > first needing to check whether the entry is a dummy. > &… [View More]

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Tracker meta-issue
by Steven D'Aprano Aug. 17, 2013

Aug. 17, 2013

Is this the right place to request somebody look at an issue in the meta-tracker? http://psf.upfronthosting.co.za/roundup/meta/issue517 Replying to reviews gives an AttributeError exception. This was reported three months ago, and is currently unassigned. Actually, on closer look, it seems to be the same issue as here: http://psf.upfronthosting.co.za/roundup/meta/issue484 which was ten months ago. Thanks, Steven

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Should the default Python 2.7 web page mention 2.7.5 instead of 2.7.2?
by Peter Portante Aug. 17, 2013

Aug. 17, 2013

See http://www.python.org/download/releases/2.7/ as of Saturday, August 17th, 2013. "Note: A bugfix release, 2.7.2, is currently available<http://www.python.org/download/releases/2.7.2/>. Its use is recommended." Kinds regards, -peter

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Dealing with import lock deadlock in Import Hooks
by Arnaud Fontaine Aug. 17, 2013

Aug. 17, 2013

[I initially posted this email to python-list but didn't get any reply, probably because this is too related to python core, so I'm posting it again here, hope that's ok...] Hello, I'm currently working on implementing Import Hooks (PEP302) with Python 2.7 to be able to import modules whose code is in ZODB. However, I have stumbled upon a widely known issue about import deadlock[0][1] (note that this issue is not directly related to ZODB, but a more general question about dealing with import … [View More]lock deadlock for Import Hooks), basically: Thread 1 is trying to import a module 'foo.bar' (where 'foo' is a package containing dynamic modules) handled by Import Hooks I implemented, so import lock is acquired before even running the hooks (Python/import.c:PyImport_ImportModuleLevel()). Then, these import hooks try to load objects from ZODB and a request is sent and handled by another thread (Thread 2) which itself tries to import another module. Of course, this causes a deadlock because the first thread still holds import lock. I have thought about the following solutions: * Backport the patch applied in python 3.3 from issue 9260[0]. This would be the best option because it would mean that even when trying to import any module from package 'foo', other modules and packages can be imported, which would solve my issue. However, I'm not sure it could be released into python 2.7? * Within the hooks, protect the Import Hooks with a separate lock for the loader method. This would prevent any other thread to import any modules from 'foo' package but still allows to call the finder method (ignoring module fullname not starting with 'foo') along with other finder methods, so that other ZODB modules can be imported. Then, in the loader method, until the module is actually inserted into sys.modules and then other load_module() PEP302 responsabilities being taken care of (such as exec the code), release the import lock so that Thread 2 can process requests and send objects back to Thread 1. About the finder method, I think that the separate lock is enough and releasing the import lock until the end of the method should be enough. However, even after trying to understand import.c, I'm not sure this is enough and that releasing import lock would not have nasty side-effects, any thoughts about that? * Fix the ZODB code to not avoid import but to me this seems like a dirty hack because it could happen again and I would prefer to fix this issue once and for all. Any thoughts or suggestion welcome, thanks! Regards, Arnaud Fontaine [View Less]

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Summary of Python tracker Issues
by Python tracker Aug. 16, 2013

Aug. 16, 2013

ACTIVITY SUMMARY (2013-08-09 - 2013-08-16) Python tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 4152 ( +4) closed 26377 (+56) total 30529 (+60) Open issues with patches: 1896 Issues opened (51) ================== #17477: update the bsddb module do build with db 5.x versions http://bugs.python.org/issue17477 reopened by jcea #18693: help() not helpful … [View More]

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PEP 452 API for Cryptographic Hash Functions v2.0
by Christian Heimes Aug. 15, 2013

Aug. 15, 2013

Hello, I have written a revised version of PEP 247. It's heavily based on AMKs original version from 2001. Version 2.0 adds ``name`` and ``block_size`` as mandatory attributes. It defines that hashing objects operate only on byte-like objects in Python 3.x, too. I have also developed an abstract base class for cryptographic hashing algorithm [1]. Should I add it to the PEP and make it mandatory for Python 3.4+? Regards, Christian [1] http://bugs.python.org/issue18742

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Issue 13248: 3.4 Removals?
by Terry Reedy Aug. 15, 2013

Aug. 15, 2013

Related to the current deprecation discussion: http://bugs.python.org/issue13248 This is a master list of deprecated items scheduled for removal in 3.4. Anything that is going to be removed should be done now, before the next alpha, methinks. -- Terry Jan Reedy

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Guidance regarding tests for the standard lib
by Steven D'Aprano Aug. 14, 2013

Aug. 14, 2013

Hi, I have raise a tracker item and PEP for adding a statistics module to the standard library: http://bugs.python.org/issue18606 http://www.python.org/dev/peps/pep-0450/ and I'm about to submit a patch containing my updated code and tests, but I've run into a problem with testing. My existing tests use unittest, and follow the basic boilerplate documented here: http://docs.python.org/3/library/test.html and when run directly they pass, but when I try to run them using Python 3.4a -m … [View More]

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SSL issues in Python stdlib and 3rd party code
by Christian Heimes Aug. 13, 2013

Aug. 13, 2013

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hello, last week Ryan Sleevi of the Google Chrome Security Team has informed us about about two issues in Python's SSL module. I already new about the cause of the first bug and suspected that our SSL module suffers from the second bug but I was unable to prove it. Both issues are security issues but their impact is limited if you trust only trustworthy root certification authorities. Any decent root CA would should not sign a malicious cert … [View More]

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Re: [Python-Dev] [Python-checkins] cpython (merge 2.7 -> 2.7): Clean merge
by Ezio Melotti Aug. 12, 2013

Aug. 12, 2013

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