Mailman 3 December 2008 - Python-Dev

Python 3 - Mac Installer?
by Mark Summerfield Jan. 2, 2009

Jan. 2, 2009

Hi, Just wondered if/when there'd be a Mac installer for Python 3? Thanks! -- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy "Programming in Python 3" - ISBN 0137129297

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A wart which should have been repaired in 3.0?
by skip＠pobox.com Jan. 2, 2009

Jan. 2, 2009

The doc for os.path.commonprefix states: Return the longest path prefix (taken character-by-character) that is a prefix of all paths in list. If list is empty, return the empty string (''). Note that this may return invalid paths because it works a character at a time. I remember encountering this in an earlier version of Python 2.x (maybe 2.2 or 2.3?) and "fixed" it to work by pathname components instead of by characters. That had to be reverted because it was a behavior … [View More]

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opcode dispatch optimization
by Antoine Pitrou Jan. 2, 2009

Jan. 2, 2009

Hello, I would like to mention that I've written a patch which enables "threaded interpretation" on the ceval loop with gcc (*). On my computer (an Athlon X2 3600+), it is good for a 15-20% speedup of the interpreter on pystone and pybench. I also had the opportunity to test it on a Core2-derived CPU, where it doesn't make a difference (I conjecture it's because Core2 CPUs have hardware-based indirect branch optimizations). It will make no difference if the interpreter is compiled with … [View More]

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test_subprocess and sparc buildbots
by Nick Coghlan Jan. 1, 2009

Jan. 1, 2009

Does anyone have local access to a sparc machine to try to track down the ongoing buildbot failures in test_subprocess? (I think the problem is specific to 3.x builds on sparc machines, but I haven't checked the buildbots all that closely - that assessment is just based on what I recall of the buildbot failure emails). Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia ---------------------------------------------------------------

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Missing FAQ about Python3 and unicode
by Victor Stinner Dec. 31, 2008

Dec. 31, 2008

Hi, Slowly, we get recurrent questions about Python3 and unicode. It's maybe time to start a FAQ? Here is an ugly draft to start it ;-) (1) Exit on undecodable command line arguments $ LANG=en_GB.UTF-8 python3.0 test.py $'\xff' Could not convert argument 2 to string$ Is it an expected behaviour? Yes! Example of the question: http://bugs.python.org/issue3023 (2) Undecodable filenames os.listdir(str)->str raises an exception on undecodable filenames. Solution: use os.listdir(… [View More]

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extremely slow exit for program having huge (45G) dict (python 2.5.2)
by Mike Coleman Dec. 31, 2008

Dec. 31, 2008

I have a program that creates a huge (45GB) defaultdict. (The keys are short strings, the values are short lists of pairs (string, int).) Nothing but possibly the strings and ints is shared. The program takes around 10 minutes to run, but longer than 20 minutes to exit (I gave up at that point). That is, after executing the final statement (a print), it is apparently spending a huge amount of time cleaning up before exiting. I haven't installed any exit handlers or anything like that, all … [View More]

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Commands for correctly merging to the python 3.0 maintenance branch
by Nick Coghlan Dec. 30, 2008

Dec. 30, 2008

Getting the svnmerge-intergrated property right when merging trunk->py3k->release30 is a little tricky. The most concise set of instructions I have found which gets it right is to do the following in the 3.0 maintenance branch after committing to the py3k branch: svn update svnmerge merge -r <py3k-rev> svn revert . svnmerge -M -F <py3k-rev> <test change still works, etc> svn commit -F svnmerge-commit-message.txt Revert and property changes on "." and running that … [View More]

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WinCE port (issues #4075 #4051)
by Ulrich Eckhardt Dec. 30, 2008

Dec. 30, 2008

Hi! I'm currently working again on the CE port, and since 2.6 and 3.0 are now out of the door, could you apply the patches in #4075 & #4051? Both patches are fairly isolated and easy to review and I'm pretty sure they won't cause any inconveniences. Note: this is far from everything that is necessary for Python to rock on CE, but these are prerequisites, as explained in both bugs' histories. thanks Uli

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Call PyType_Ready on builtin types during interpreter startup?
by Nick Coghlan Dec. 28, 2008

Dec. 28, 2008

Some strangeness was recently reported for the range() type in Py3k where instances are unhashable until an attribute is retrieved from the range type itself, and then they become hashable. [1] While there is definitely an associated bug in the range implementation (it doesn't block inheritance of the default object.__hash__ implementation), there's also the fact that when the interpreter *starts* the hash implementation hasn't been inherited yet, but it does get inherited later. It turns out … [View More]

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Use -M option on buildbots?
by Antoine Pitrou Dec. 28, 2008

Dec. 28, 2008

Hi all, Could we use the -M option (with a suitable value depending on the amount of physical RAM) for regression tests on the buildbots? It would help avoid the kind of situation described in http://bugs.python.org/issue3700 cheers Antoine.

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