Mailman 3 April 2013 - Python-Dev

Re: [Python-Dev] [Python-checkins] cpython: Issue #17693: CJK encoders now use the new Unicode API (PEP 393)
by Nick Coghlan April 15, 2013

April 15, 2013

On Sun, Apr 14, 2013 at 10:06 AM, victor.stinner <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/d621bdaed7c3 > changeset: 83317:d621bdaed7c3 > user: Victor Stinner <victor.stinner(a)gmail.com> > date: Sun Apr 14 02:06:32 2013 +0200 > summary: > Issue #17693: CJK encoders now use the new Unicode API (PEP 393) I'm going to run with the wild theory that there's a reference link in here somewhere... :) results for … [View More]

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[Announcement] New mailing list for code quality tools including Flake8, Pyflakes and Pep8
by Ian Cordasco April 14, 2013

April 14, 2013

Hello, There's a new mailing-list related to Python code-quality tools. Are you concerned about the evolution of various code checkers? Do you have questions or suggestions? Subscribe here: http://mail.python.org/mailman/listinfo/code-quality Best regards, Ian

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casefolding in pathlib (PEP 428)
by Guido van Rossum April 13, 2013

April 13, 2013

Hey Antoine, Some of my Dropbox colleagues just drew my attention to the occurrence of case folding in pathlib.py. Basically, case folding as an approach to comparing pathnames is fatally flawed. The issues include: - most OSes these days allow the mounting of both case-sensitive and case-insensitive filesystems simultaneously - the case-folding algorithm on some filesystems is burned into the disk when the disk is formatted - case folding requires domain knowledge, e.g. turkish dotless I -… [View More]

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Re: [Python-Dev] [Python-checkins] cpython (2.7): Issue #16447: Fix potential segfault when setting __name__ on a class.
by Eli Bendersky April 13, 2013

April 13, 2013

Test case? On Sat, Apr 13, 2013 at 7:19 AM, mark.dickinson <python-checkins(a)python.org>wrote: > http://hg.python.org/cpython/rev/d5e5017309b1 > changeset: 83283:d5e5017309b1 > branch: 2.7 > user: Mark Dickinson <dickinsm(a)gmail.com> > date: Sat Apr 13 15:19:05 2013 +0100 > summary: > Issue #16447: Fix potential segfault when setting __name__ on a class. > > files: > Lib/test/test_descr.py | 14 ++++++++++++++ > Misc/… [View More]NEWS | 3 +++ > Objects/typeobject.c | 6 +++++- > 3 files changed, 22 insertions(+), 1 deletions(-) > > > diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py > --- a/Lib/test/test_descr.py > +++ b/Lib/test/test_descr.py > @@ -4136,6 +4136,20 @@ > C.__name__ = 'D.E' > self.assertEqual((C.__module__, C.__name__), (mod, 'D.E')) > > + def test_evil_type_name(self): > + # A badly placed Py_DECREF in type_set_name led to arbitrary code > + # execution while the type structure was not in a sane state, and > a > + # possible segmentation fault as a result. See bug #16447. > + class Nasty(str): > + def __del__(self): > + C.__name__ = "other" > + > + class C(object): > + pass > + > + C.__name__ = Nasty("abc") > + C.__name__ = "normal" > + > def test_subclass_right_op(self): > # Testing correct dispatch of subclass overloading __r<op>__... > > diff --git a/Misc/NEWS b/Misc/NEWS > --- a/Misc/NEWS > +++ b/Misc/NEWS > @@ -17,6 +17,9 @@ > Core and Builtins > ----------------- > > +- Issue #16447: Fixed potential segmentation fault when setting __name__ > on a > + class. > + > - Issue #17610: Don't rely on non-standard behavior of the C qsort() > function. > > Library > diff --git a/Objects/typeobject.c b/Objects/typeobject.c > --- a/Objects/typeobject.c > +++ b/Objects/typeobject.c > @@ -225,6 +225,7 @@ > type_set_name(PyTypeObject *type, PyObject *value, void *context) > { > PyHeapTypeObject* et; > + PyObject *tmp; > > if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { > PyErr_Format(PyExc_TypeError, > @@ -253,10 +254,13 @@ > > Py_INCREF(value); > > - Py_DECREF(et->ht_name); > + /* Wait until et is a sane state before Py_DECREF'ing the old > et->ht_name > + value. (Bug #16447.) */ > + tmp = et->ht_name; > et->ht_name = value; > > type->tp_name = PyString_AS_STRING(value); > + Py_DECREF(tmp); > > return 0; > } > > -- > Repository URL: http://hg.python.org/cpython > > _______________________________________________ > Python-checkins mailing list > Python-checkins(a)python.org > http://mail.python.org/mailman/listinfo/python-checkins > > [View Less]

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Multiline Strings confusion it tutorial
by Christian Tismer April 12, 2013

April 12, 2013

I wanted to point a bling guy to the Python wiki: http://wiki.python.org/moin/BeginnersGuide/Programmers/SimpleExamples#previ… and when reading a little bit, I found the entry on multiline strings. I found that example pretty contorted, because this is not a multiline string. Instead, there are multiple lines which define a single line string! Actually, the construct is even syntactically nothing else than a single line string which is handled by the parser, already. A multiline string is … [View More]

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Re: [Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library
by Fábio Santos April 12, 2013

April 12, 2013

On Fri, Apr 12, 2013 at 7:21 PM, Russell E. Owen <rowen(a)uw.edu> wrote: > Using intEnum is certainly doable, but that opens up the door to > comparing values from different Enums, which is not something I'd want > to allow. I agree. Comparing values from different Enums could cause a lot of hard to find bugs. On the other hand, simply checking in `__cmp__` what Enum both values belong to (since they do have a `enum` attribute) should allow us to avoid cross-comparing instead … [View More]

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The end of 2.7
by Benjamin Peterson April 12, 2013

April 12, 2013

Per my last message, 2.7.4 has at long last been released. I apologize for the long interval between 2.7.3 and 2.7.4. To create more determinism in the future, I will be soon updating PEP 373 with approximate dates of future 2.7 bugfix releases. I will be aiming for 6 month intervals. This means we need to talk about how many more 2.7 releases there are going to be. At the release of 2.7.0, I thought we promised 5 years of bugfix maintenance, but my memory may be fuddled. At any rate, 2.7.0 … [View More]

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Biggest Fake Conference in Computer Science
by nelsonsteves＠hushmail.com April 12, 2013

April 12, 2013

We are researchers from different parts of the world and conducted a study on the world’s biggest bogus computer science conference WORLDCOMP ( http://sites.google.com/site/worlddump1 ) organized by Prof. Hamid Arabnia from University of Georgia, USA. We submitted a fake paper to WORLDCOMP 2011 and again (the same paper with a modified title) to WORLDCOMP 2012. This paper had numerous fundamental mistakes. Sample statements from that paper include: (1). Binary logic is fuzzy logic … [View More]and vice versa (2). Pascal developed fuzzy logic (3). Object oriented languages do not exhibit any polymorphism or inheritance (4). TCP and IP are synonyms and are part of OSI model (5). Distributed systems deal with only one computer (6). Laptop is an example for a super computer (7). Operating system is an example for computer hardware Also, our paper did not express any conceptual meaning. However, it was accepted both the times without any modifications (and without any reviews) and we were invited to submit the final paper and a payment of $500+ fee to present the paper. We decided to use the fee for better purposes than making Prof. Hamid Arabnia (Chairman of WORLDCOMP) rich. After that, we received few reminders from WORLDCOMP to pay the fee but we never responded. We MUST say that you should look at the above website if you have any thoughts to submit a paper to WORLDCOMP. DBLP and other indexing agencies have stopped indexing WORLDCOMP’s proceedings since 2011 due to its fakeness. See http://www.informatik.uni-trier.de/~ley/db/conf/icai/index.html for of one of the conferences of WORLDCOMP and notice that there is no listing after 2010. See http://sites.google.com/site/dumpconf for comments from well-known researchers about WORLDCOMP. If WORLDCOMP is not fake then why did DBLP suddenly stopped listing the proceedings after? The status of your WORLDCOMP papers can be changed from “scientific” to “other” (i.e., junk or non-technical) at any time. See the comments http://www.mail-archive.com/tccc@lists.cs.columbia.edu/msg05168.html of a respected researcher on this. Better not to have a paper than having it in WORLDCOMP and spoil the resume and peace of mind forever! Our study revealed that WORLDCOMP is a money making business, using University of Georgia mask, for Prof. Hamid Arabnia. He is throwing out a small chunk of that money (around 20 dollars per paper published in WORLDCOMP’s proceedings) to his puppet (Mr. Ashu Solo or A.M.G. Solo) who publicizes WORLDCOMP and also defends it at various forums, using fake/anonymous names. The puppet uses fake names and defames other conferences to divert traffic to WORLDCOMP. He also makes anonymous phone calls and threatens the critiques of WORLDCOMP (see Item 7 in Section 5 of http://sites.google.com/site/dumpconf ).That is, the puppet does all his best to get a maximum number of papers published at WORLDCOMP to get more money into his (and Prof. Hamid Arabnia’s) pockets. Monte Carlo Resort (the venue of WORLDCOMP until 2012) has refused to provide the venue for WORLDCOMP’13 because of the fears of their image being tarnished due to WORLDCOMP’s fraudulent activities. WORLDCOMP’13 will be held at a different resort. WORLDCOMP will not be held after 2013. The paper submission deadline for WORLDCOMP’13 was March 18 and it was extended to April 6 and now it is extended to April 20 (it may be extended again) but still there are no committee members, no reviewers, and there is no conference Chairman. The only contact details available on WORLDCOMP’s website is just an email address! Prof. Hamid Arabnia expends the deadline to get more papers (means, more registration fee into his pocket!). Let us make a direct request to Prof. Hamid arabnia: publish all reviews for all the papers (after blocking identifiable details) since 2000 conference. Reveal the names and affiliations of all the reviewers (for each year) and how many papers each reviewer had reviewed on average. We also request him to look at the Open Challenge at https://sites.google.com/site/moneycomp1 Sorry for posting to multiple lists. Spreading the word is the only way to stop this bogus conference. Please forward this message to other mailing lists and people. We are shocked with Prof. Hamid Arabnia and his puppet’s activities http://worldcomp-fake-bogus.blogspot.com Search Google using the keyword worldcomp fake for additional links. [View Less]

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Summary of Python tracker Issues
by Python tracker April 12, 2013

April 12, 2013

ACTIVITY SUMMARY (2013-04-05 - 2013-04-12) 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 3908 ( +3) closed 25569 (+61) total 29477 (+64) Open issues with patches: 1728 Issues opened (38) ================== #17642: IDLE add font resizing hot keys http://bugs.python.org/issue17642 opened by rhettinger #17643: Expose weakref callback for … [View More]

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Re: [Python-Dev] cpython: Add fast-path in PyUnicode_DecodeCharmap() for pure 8 bit encodings:
by Serhiy Storchaka April 11, 2013

April 11, 2013

On 09.04.13 23:29, victor.stinner wrote: > http://hg.python.org/cpython/rev/53879d380313 > changeset: 83216:53879d380313 > parent: 83214:b7f2d28260b4 > user: Victor Stinner <victor.stinner(a)gmail.com> > date: Tue Apr 09 21:53:09 2013 +0200 > summary: > Add fast-path in PyUnicode_DecodeCharmap() for pure 8 bit encodings: > cp037, cp500 and iso8859_1 codecs I deliberately specialized only most typical case in order to reduce maintaining … [View More]

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Re: [Python-Dev] cpython (3.3): don't run frame if it has no stack (closes #17669)
by Antoine Pitrou April 11, 2013

April 11, 2013

On Wed, 10 Apr 2013 23:01:46 +0200 (CEST) benjamin.peterson <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/35cb75b9d653 > changeset: 83238:35cb75b9d653 > branch: 3.3 > parent: 83235:172f825d7fc9 > user: Benjamin Peterson <benjamin(a)python.org> > date: Wed Apr 10 17:00:56 2013 -0400 > summary: > don't run frame if it has no stack (closes #17669) Wouldn't it be better with a test? Regards Antoine. … [View More]

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How to fix the incorrect shared library extension on linux for 3.2 and newer?
by Matthias Klose April 10, 2013

April 10, 2013

This is http://bugs.python.org/issue16754, affecting Linux systems only, and only those which don't provide static libraries. PEP 3149 did change the SO macro to include the ABI tag, although the SO macro is used to search for shared system libraries too. E.g. searching for the jpeg library search for a file libjpeg.cpython3.3m.so, which is not found. If the static library libjpeg.a is found, it is taken, and linked as -ljpeg, which then links with the shared library. The patch in the issue … [View More]

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Re: [Python-Dev] [Python-checkins] cpython (3.3): Process DEFAULT values in mock side_effect that returns iterator.
by Michael Foord April 9, 2013

April 9, 2013

On 7 April 2013 14:44, andrew.svetlov <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/18fd64f1de2d > changeset: 83179:18fd64f1de2d > branch: 3.3 > user: Andrew Svetlov <andrew.svetlov(a)gmail.com> > date: Sun Apr 07 16:42:24 2013 +0300 > summary: > Process DEFAULT values in mock side_effect that returns iterator. > > Patch by Michael Ford. > > files: > Lib/unittest/mock.py | 2 ++… [View More]

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Accelerating extension module compilation [distutils]
by Alex Leach April 9, 2013

April 9, 2013

Hi, Apologies if this is the wrong place to ask, but thought this question would be relevant to Python core and extension module devs.. This the right place? I've been using distutils to compile C++ extensions / bindings written with Boost.Python, and have been implementing some (often frowned-upon) monkey-patching magic to speed up the compilation process. I was wondering if other Python devs would appreciate the benefit from a distutils-integrated patch of the same functionality,… [View More]

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Python accepted as a GSoC 2013 mentoring organization!
by Terri Oda April 8, 2013

April 8, 2013

Congratulations all; we've been accepted as a mentoring organization for Google Summer of Code 2013! Students can check out our ideas page here: http://wiki.python.org/moin/SummerOfCode/2013 If you're interested in mentoring with the PSF and aren't already on the 2013 mentors mailing list, please get in touch with me ASAP. Terri

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Fwd: SourceForge Project Upgrade Notification
by Skip Montanaro April 8, 2013

April 8, 2013

Obviously SourceForge doesn't think the current release interval is short enough. (Emphasis mine.) :-) Skip ---------- Forwarded message ---------- From: SourceForge.net <noreply+project-upgrade(a)in.sf.net> Date: Mon, Apr 8, 2013 at 1:09 PM Subject: SourceForge Project Upgrade Notification To: noreply(a)in.sf.net Dear SourceForge Project Developer, We wanted to let you know that we've upgraded your project, Python, to the new SourceForge developer platform. The next time you log … [View More]

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Updates to PEP 1 (PEP process meta-PEP)
by Nick Coghlan April 7, 2013

April 7, 2013

I just pushed two modifications to PEP 1, both triggered by the in-progress packaging PEP updates (see diff at http://hg.python.org/peps/rev/0a8e456973ed). The first change is the one I raised at the language summit, allowing pronouncement on PEPs that don't immediately affect the language definition or the standard library to occur on a list other than python-dev. This is done by giving the "Discussions-To" header a bit more force. The other change is closely related, but wasn't specifically … [View More]

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[RELEASED] Python 3.2.4 and Python 3.3.1
by Georg Brandl April 6, 2013

April 6, 2013

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On behalf of the Python development team, I am pleased to announce the final releases of Python 3.2.4 and 3.3.1. Python 3.2.4 is the final regular maintenance release for the Python 3.2 series, while Python 3.3.1 is the first maintenance release for the 3.3 series. Both releases include hundreds of bugfixes. There has recently been a lot of discussion about XML-based denial of service attacks. Specifically, certain XML files can cause XML … [View More]

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Semantics of __int__(), __index__()
by Mark Shannon April 6, 2013

April 6, 2013

Hi all, I was looking into http://bugs.python.org/issue17576 and I found that the semantics of __int__() and __index__() are not precisely defined in the documentation and that the implementation (CPython 3.4a) has some odd behaviour. Defining two classes: class Int1(int): def __init__(self, val=0): print("new %s" % self.__class__) class Int2(Int1): def __int__(self): return self and two instances i1 = Int1() i2 = Int2() we get the following behaviour: … [View More]

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[RELEASE] Python 2.7.4
by Benjamin Peterson April 6, 2013

April 6, 2013

I'm thrilled to announce the release of Python 2.7.4. 2.7.4 is the latest maintenance release in the Python 2.7 series. It includes hundreds of bugfixes to the core language and standard library. Downloads are at http://python.org/download/releases/2.7.4/ As always, please report bugs to http://bugs.python.org/ Several regressions found in the release candidate have been fixed. Many thanks to those who tested the preview release. There has recently been a lot of discussion about … [View More]

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give IDLE its own NEWS section?
by Benjamin Peterson April 6, 2013

April 6, 2013

I noticed IDLE changes were being put under the "library" section in Misc/NEWS. How about creating a IDLE section? -- Regards, Benjamin

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Re: [Python-Dev] [Python-checkins] cpython (merge 3.3 -> default): Fix typo
by Eli Bendersky April 6, 2013

April 6, 2013

On Fri, Apr 5, 2013 at 1:40 AM, andrew.svetlov <python-checkins(a)python.org>wrote: > http://hg.python.org/cpython/rev/6cf485ffd325 > changeset: 83110:6cf485ffd325 > parent: 83106:94fb906e5899 > parent: 83109:9610ede72ed2 > user: Andrew Svetlov <andrew.svetlov(a)gmail.com> > date: Fri Apr 05 11:40:01 2013 +0300 > summary: > Fix typo > > files: > Doc/howto/argparse.rst | 2 +- > 1 files changed, 1 insertions(+), 1 … [View More]

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Is file.readlines(sizehint=N) broken on 2.7?
by Giampaolo Rodolà April 5, 2013

April 5, 2013

with open('test-xxx', 'w') as f: f.write('aaa\nbbb\nccc') with open('test-xxx', 'r') as f: print(f.readlines(1)) On Python 3.3 I get: ['aaa\n'] ...while on Python 2.7: ['aaa\n', 'bbb\n', 'ccc'] Is this a bug or I'm missing something? --- Giampaolo https://code.google.com/p/pyftpdlib/ https://code.google.com/p/psutil/ https://code.google.com/p/pysendfile/

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Summary of Python tracker Issues
by Python tracker April 5, 2013

April 5, 2013

ACTIVITY SUMMARY (2013-03-29 - 2013-04-05) 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 3905 (+20) closed 25508 (+47) total 29413 (+67) Open issues with patches: 1729 Issues opened (48) ================== #17425: Update OpenSSL versions in Windows builds http://bugs.python.org/issue17425 reopened by pitrou #17574: pysetup failing with "OSError: … [View More]

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Slides from today's parallel/async Python talk
by Trent Nelson April 5, 2013

April 5, 2013

Just posted the slides for those that didn't have the benefit of attending the language summit today: https://speakerdeck.com/trent/parallelizing-the-python-interpreter-an-alter… Trent.

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