Mailman 3 July 2013 - Python-Dev

lament for the demise of unbound methods
by Chris Withers July 7, 2013

July 7, 2013

Hi All, In Python 2, I can figure out whether I have a method or a function, and, more importantly, for an unbound method, I can figure out what class the method belongs to: >>> class MyClass(object): ... def method(self): pass ... >>> MyClass.method <unbound method MyClass.method> >>> MyClass.method.im_class <class '__main__.MyClass'> There doesn't appear to be any way in Python 3 to do this, which is a little surprising and frustrating... … [View More]

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Re: [Python-Dev] [Python-checkins] cpython (3.3): Issue #17860: explicitly mention that std* streams are opened in binary mode by
by R. David Murray July 7, 2013

July 7, 2013

On Sat, 06 Jul 2013 10:25:19 +0200, ronald.oussoren <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/a2c2ffa1a41c > changeset: 84453:a2c2ffa1a41c > branch: 3.3 > parent: 84449:df79735b21c1 > user: Ronald Oussoren <ronaldoussoren(a)mac.com> > date: Sat Jul 06 10:23:59 2013 +0200 > summary: > Issue #17860: explicitly mention that std* streams are opened in binary mode by default. > > The documentation … [View More]

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PEP 423 : naming conventions and recipes related to packaging
by Benoît Bryon July 5, 2013

July 5, 2013

Hi, Here is an informational PEP proposal: http://hg.python.org/peps/file/52767ab7e140/pep-0423.txt Could you review it for style, consistency and content? Additional notes: * Original discussion posted to distutils-sig(a)python.org * started on May 2012 at http://mail.python.org/pipermail/distutils-sig/2012-May/018551.html * continues in June 2012 at http://mail.python.org/pipermail/distutils-sig/2012-June/018641.html * that's why I set "Discussion-To:<distutils-… [View More]

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

July 5, 2013

ACTIVITY SUMMARY (2013-06-28 - 2013-07-05) 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 4072 ( +3) closed 26066 (+39) total 30138 (+42) Open issues with patches: 1803 Issues opened (32) ================== #5308: cannot marshal objects with more than 2**31 elements http://bugs.python.org/issue5308 reopened by christian.heimes #13153: IDLE … [View More]

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Oddity in MISC/News on default
by Antoine Pitrou July 5, 2013

July 5, 2013

Hello, In 3.4's Misc/NEWS, there's a huge section entitled "What's New in Python 3.3.1 release candidate 1". It seems it shouldn't be there, should it? Regards Antoine.

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Solving the import-deadlock case
by Pascal Chambon July 3, 2013

July 3, 2013

Hello everyone, I'd like to bring your attention to this issue, since it touches the fundamentals of python's import workflow: http://bugs.python.org/issue17716 /I've tried to post it on the python-import ML for weeks, but it must still be blocked somewhere in a moderation queue, so here I come ^^/ TLDR version: because of the way import current works, if importing a package "temporarily" fails whereas importing one of its children succeeded, we reach an unusable state, all subsequent … [View More]

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Expose stack effects to Python?
by Larry Hastings July 3, 2013

July 3, 2013

I wrote my own assembler for Python bytecode called "Maynard". I had to statically compute the stack effects for each bytecode instruction by hand; what I did was copied and pasted opcode_stack_effect() (which is static) out of Python/compile.c and into my own driver program, then I probed it with test values to produce a table. I then coded up a function using that table, but hand-calculating the value sometimes as there are some opcodes whose stack effect varies based on the oparg. … [View More]

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Issue 18312 "fix" broke buildbots
by Eric V. Smith July 3, 2013

July 3, 2013

I'm not sure how my change broke the buildbots, but apparently it did. I need to run to a meeting now, but I can roll this back in the next few hours. If someone else wants to roll it back before I get to it, feel free. Sorry about the problem. I tested it locally, I'm not sure how the buildbots are affected. Eric.

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Why are captured parameters also listed in co_varnames?
by Andrea Griffini July 2, 2013

July 2, 2013

I'm trying to understand how CPython implements closure variable capture and there is one minor point I can't understand. When a local is captured it gets allocated in co_cellvars and is accessed with (LOAD|STORE)_DEREF, and this is clear. However when a local is coming from a parameter it gets ALSO allocated in co_varnames even if the local slot apparently is not accesible because *_FAST opcodes are not generated. Is there a technical reason for this? It happens in CPython 2, 3 and even in PyPy... Andrea Griffini

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End of the mystery "@README.txt Mercurial bug"
by Victor Stinner July 1, 2013

July 1, 2013

Hi, One month ago, unit tests were added to IDLE (cool!) with a file called @README.txt. The @ was used to see the name on top in a listing of the directory. Some developers began to get strange Mercurial errors like: "abort: data/Lib/idlelib/idle_test/(a)README.txt.i at 7573717b9e6f: no match" " 83941: empty or missing Lib/idlelib/idle_test/(a)README.txt " etc. Senthil reported the issue on python-committers mailing list: http://mail.python.org/pipermail/python-committers/2013-May/002565.… [View More]

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