Mailman 3 February 2010 - Python-Dev

[RELEASED] Python 2.7 alpha 3
by Benjamin Peterson 06 Feb '10

06 Feb '10

On behalf of the Python development team, I'm cheerful to announce the third alpha release of Python 2.7. Python 2.7 is scheduled (by Guido and Python-dev) to be the last major version in the 2.x series. Though more major releases have not been absolutely ruled out, it's likely that the 2.7 release will an extended period of maintenance for the 2.x series. 2.7 includes many features that were first released in Python 3.1. The faster io module, the new nested with statement syntax, improved float repr, set literals, dictionary views, and the memoryview object have been backported from 3.1. Other features include an ordered dictionary implementation, unittests improvements, a new sysconfig module, and support for ttk Tile in Tkinter. For a more extensive list of changes in 2.7, see http://doc.python.org/dev/whatsnew/2.7.html or Misc/NEWS in the Python distribution. To download Python 2.7 visit: http://www.python.org/download/releases/2.7/ Please note that this is a development release, intended as a preview of new features for the community, and is thus not suitable for production use. The 2.7 documentation can be found at: http://docs.python.org/2.7 Please consider trying Python 2.7 with your code and reporting any bugs you may notice to: http://bugs.python.org Enjoy! -- Benjamin Peterson 2.7 Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7's contributors)

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Re: [Python-Dev] Rational for PEP 3147 (PYC Respository Directories)
by Jan Matějek 05 Feb '10

05 Feb '10

Dne 3.2.2010 18:39, Antoine Pitrou napsal(a): > Neil Schemenauer <nas <at> arctrix.com> writes: >> >> Thanks for doing the work of writing a PEP. The rational section >> could use some strengthing, I think. Who is benefiting from this >> feature? Is it the distribution package maintainers? Maybe people >> who use a distribution packaged Python and install packages from >> PyPI. It's not clear to me, anyhow. > > It would also be nice to have other packagers' take on this (Redhat, Mandriva, > etc.). But of course you aren't responsible if they don't show up. As the SUSE guy, i don't care either way. This has simply no benefits or drawbacks for us. This solution can only be beneficial in systems like Debian's python-support, where you byte-compile when installing. We byte-compile at build time, so if we wanted to support more than one python within one package, we would need to distribute a rpm full of different .pycs for all supported python versions. Yes, that was not possible before and it is possible with this PEP, but there is no sense in doing it ;) That said, i don't particularly care whether the installed pycs are in a separate __pycache__ directory or next to their sources. (there were very good arguments in the other thread against subdir clutter, one more from me: each subdirectory has a separate entry in rpm database, so by creating subdir clutter you're also cluttering our packaging system) +0 from me regards m. > > cheers > > Antoine. > > > _______________________________________________ > Python-Dev mailing list > Python-Dev(a)python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: http://mail.python.org/mailman/options/python-dev/jmatejek%40suse.cz

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Summary of Python tracker Issues
by Python tracker 05 Feb '10

05 Feb '10

ACTIVITY SUMMARY (01/29/10 - 02/05/10) Python tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue number. Do NOT respond to this message. 2602 open (+38) / 17079 closed (+15) / 19681 total (+53) Open issues with patches: 1069 Average duration of open issues: 707 days. Median duration of open issues: 461 days. Open Issues Breakdown open 2568 (+38) pending 33 ( +0) Issues Created Or Reopened (57) _______________________________ allow unicode keyword args 02/04/10 http://bugs.python.org/issue4978 reopened barry patch, needs review A selection of spelling errors and typos throughout source 02/04/10 http://bugs.python.org/issue5341 reopened ezio.melotti patch enable compilation of readline module on Mac OS X 10.5 and 10.6 02/04/10 http://bugs.python.org/issue6877 reopened barry patch, 26backport, needs review segfault when deleting from a list using slice with very big `st 02/03/10 http://bugs.python.org/issue7788 reopened mark.dickinson patch test_macostools fails on OS X 10.6: no attribute 'FSSpec' 01/29/10 http://bugs.python.org/issue7807 created mark.dickinson test_bsddb3 leaks references 01/29/10 http://bugs.python.org/issue7808 created flox patch Documentation for random module should indicate that a call to s 01/30/10 CLOSED http://bugs.python.org/issue7809 created Justin.Lebar fix_callable breakage 01/30/10 CLOSED http://bugs.python.org/issue7810 created loewis [decimal] ValueError -> TypeError in from_tuple 01/30/10 http://bugs.python.org/issue7811 created skrah Call to gestalt('sysu') on OSX can lead to freeze in wxPython ap 01/30/10 http://bugs.python.org/issue7812 created phansen Bug in command-line module launcher 01/30/10 http://bugs.python.org/issue7813 created pakal patch SimpleXMLRPCServer Example uses "mul" instead of "div" in client 01/30/10 CLOSED http://bugs.python.org/issue7814 created mnewman Regression in unittest traceback formating extensibility 01/30/10 http://bugs.python.org/issue7815 created gz test_capi crashes when run with "-R" 01/30/10 CLOSED http://bugs.python.org/issue7816 created flox patch Pythonw.exe fails to start 01/31/10 CLOSED http://bugs.python.org/issue7817 created ZDan Improve set().test_c_api(): don't expect a set("abc"), modify th 01/31/10 http://bugs.python.org/issue7818 created haypo patch sys.call_tracing(): check arguments type 01/31/10 CLOSED http://bugs.python.org/issue7819 created haypo patch parser: restores all bytes in the right order if check_bom() fai 01/31/10 http://bugs.python.org/issue7820 created haypo patch Command line option -U not documented 01/31/10 CLOSED http://bugs.python.org/issue7821 created stevenjd 2to3 does not convert output lines in doctests 01/31/10 CLOSED http://bugs.python.org/issue7822 created Merwok multiplying a list of dictionaries 01/31/10 CLOSED http://bugs.python.org/issue7823 created Andrew.Hays assertion error in 2to3 01/31/10 CLOSED http://bugs.python.org/issue7824 created ferringb test_threadsignals leaks references 01/31/10 http://bugs.python.org/issue7825 created haypo support caching for 2to3 02/01/10 http://bugs.python.org/issue7826 created ferringb patch, needs review recv_into() argument 1 must be pinned buffer, not bytearray 02/01/10 http://bugs.python.org/issue7827 created dalke patch chr() and ord() documentation for wide characters 02/01/10 http://bugs.python.org/issue7828 created nudgenudge dis module documentation gives no indication of the dangers of b 02/01/10 http://bugs.python.org/issue7829 created exarkun Flatten nested functools.partial 02/01/10 http://bugs.python.org/issue7830 created Alexander.Belopolsky patch cmp() is missing in 3.x 02/01/10 CLOSED http://bugs.python.org/issue7831 created flox assertSameElements([0, 1, 1], [0, 0, 1]) does not fail 02/01/10 http://bugs.python.org/issue7832 created flox patch Bdist_wininst installers fail to load extensions built with Issu 02/01/10 http://bugs.python.org/issue7833 created cgohlke patch socket.connect() no longer works with AF_BLUETOOTH L2CAP sockets 02/02/10 http://bugs.python.org/issue7834 created Mathew.Martineau easy Minor bug in 2.6.4 related to cleanup at end of program 02/02/10 http://bugs.python.org/issue7835 created Jesse.Aldridge patch, easy Add /usr/sfw/lib to OpenSSL search path for Solaris. 02/02/10 http://bugs.python.org/issue7836 created drkirkby assertSameElements doesn't filter enough py3k warnings 02/02/10 http://bugs.python.org/issue7837 created ezio.melotti patch, patch, easy, needs review Undocumented subprocess functions on Windows 02/02/10 http://bugs.python.org/issue7838 created brian.curtin patch, easy, needs review Popen should raise ValueError if pass a string when shell=False 02/02/10 http://bugs.python.org/issue7839 created r.david.murray easy Lib/ctypes/test/test_pep3118.py should not shadow the memoryview 02/02/10 http://bugs.python.org/issue7840 created pitrou test_capi fails when run more than once 02/02/10 CLOSED http://bugs.python.org/issue7841 created pitrou py_compile.compile SyntaxError output 02/02/10 http://bugs.python.org/issue7842 created nheron patch python-dev archives are not updated 02/03/10 http://bugs.python.org/issue7843 created isandler Add -3 warning for absolute imports. 02/03/10 http://bugs.python.org/issue7844 created mark.dickinson complex.__lt__ should return NotImplemented instead of raising T 02/03/10 http://bugs.python.org/issue7845 created mark.dickinson Fnmatch cache is never cleared during usage 02/03/10 http://bugs.python.org/issue7846 created andrewclegg patch, needs review Remove 'python -U' or document it 02/03/10 http://bugs.python.org/issue7847 created barry patch, needs review copy.copy corrupts objects that return false value from __getsta 02/03/10 http://bugs.python.org/issue7848 created alga Improve "test_support.check_warnings()" 02/03/10 http://bugs.python.org/issue7849 created flox patch platform.system() should be "macosx" instead of "Darwin" on OSX 02/03/10 http://bugs.python.org/issue7850 created ronaldoussoren WatchedFileHandler needs to be references as handlers.WatchedFil 02/03/10 CLOSED http://bugs.python.org/issue7851 created Tom.Aratyn [PATCH] Drop "Computer" from "Apple Computer" in plistlib 02/04/10 http://bugs.python.org/issue7852 created wangchun patch on __exit__(), exc_value does not contain the exception. 02/04/10 CLOSED http://bugs.python.org/issue7853 created flox patch term paper 02/04/10 CLOSED http://bugs.python.org/issue7854 created allisonlong Add test cases for ctypes/winreg for issues found in IronPython 02/04/10 http://bugs.python.org/issue7855 created DinoV patch cannot decode from or encode to big5 \xf9\xd8 02/05/10 http://bugs.python.org/issue7856 created Xuefer.x test_logging fails 02/05/10 http://bugs.python.org/issue7857 created pitrou buildbot os.utime(file, (0,0,)) fails on on vfat, but doesn't fail immedi 02/05/10 http://bugs.python.org/issue7858 created Damien.Elmes support "with self.assertRaises(SomeException) as exc:" syntax 02/05/10 http://bugs.python.org/issue7859 created flox Issues Now Closed (37) ______________________ Remove use of the stat module in the stdlib 628 days http://bugs.python.org/issue2874 brett.cannon patch Python 2.6rc2: Tix ComboBox error 504 days http://bugs.python.org/issue3872 matthieu.labbe patch xmlrpc.client - default 'SlowParser' not defined 439 days http://bugs.python.org/issue4340 haypo undesired switch fall-through in socketmodule.c 402 days http://bugs.python.org/issue4772 pitrou patch, needs review Can SGMLParser properly handle <empty/> tags? 325 days http://bugs.python.org/issue5498 ezio.melotti easy Cannot build extension in amd64 using msvc9compiler 233 days http://bugs.python.org/issue6283 tarek patch to subprocess docs to better explain Popen's 'args' argume 167 days http://bugs.python.org/issue6760 r.david.murray patch, needs review shadows around the io truncate() semantics 136 days http://bugs.python.org/issue6939 pakal patch xmlrpc.server assumes sys.stdout will have a buffer attribute 105 days http://bugs.python.org/issue7165 loewis patch pydoc doesn't work from the command line 77 days http://bugs.python.org/issue7328 Merwok MemoryView_FromObject crashes if PyBuffer_GetBuffer fails 71 days http://bugs.python.org/issue7385 pitrou patch decimal.py: infinity coefficients in tuples 17 days http://bugs.python.org/issue7684 rhettinger test_xmlrpc fails with non-ascii path 15 days http://bugs.python.org/issue7708 haypo patch, buildbot pydoc error - "No module named tempfile" 11 days http://bugs.python.org/issue7749 r.david.murray newgil backport 12 days http://bugs.python.org/issue7753 twhitema patch, needs review Add PyLong_AsLongLongAndOverflow 6 days http://bugs.python.org/issue7767 mark.dickinson patch, needs review patch for making list/insert at the top of the list avoid memmov 3 days http://bugs.python.org/issue7784 Steve Howell patch xmlrpc.client binary object examples needs to use binary mode 1 days http://bugs.python.org/issue7801 haypo socket.gaierror before ProtocolError for xmlrpc.client 2 days http://bugs.python.org/issue7802 georg.brandl Documentation for random module should indicate that a call to s 1 days http://bugs.python.org/issue7809 rhettinger fix_callable breakage 0 days http://bugs.python.org/issue7810 benjamin.peterson SimpleXMLRPCServer Example uses "mul" instead of "div" in client 0 days http://bugs.python.org/issue7814 georg.brandl test_capi crashes when run with "-R" 3 days http://bugs.python.org/issue7816 benjamin.peterson patch Pythonw.exe fails to start 1 days http://bugs.python.org/issue7817 georg.brandl sys.call_tracing(): check arguments type 1 days http://bugs.python.org/issue7819 haypo patch Command line option -U not documented 0 days http://bugs.python.org/issue7821 loewis 2to3 does not convert output lines in doctests 0 days http://bugs.python.org/issue7822 Merwok multiplying a list of dictionaries 1 days http://bugs.python.org/issue7823 r.david.murray assertion error in 2to3 0 days http://bugs.python.org/issue7824 loewis cmp() is missing in 3.x 1 days http://bugs.python.org/issue7831 ezio.melotti test_capi fails when run more than once 0 days http://bugs.python.org/issue7841 flox WatchedFileHandler needs to be references as handlers.WatchedFil 1 days http://bugs.python.org/issue7851 vinay.sajip on __exit__(), exc_value does not contain the exception. 1 days http://bugs.python.org/issue7853 benjamin.peterson patch term paper 0 days http://bugs.python.org/issue7854 brian.curtin Proposal to implement comment rows in csv module 1687 days http://bugs.python.org/issue1225769 andrewmcnamara patch uninitialized memory read in parsetok() 1228 days http://bugs.python.org/issue1562308 benjamin.peterson object.__init__ shouldn't allow args/kwds 1051 days http://bugs.python.org/issue1683368 gregory.p.smith Top Issues Most Discussed (10) ______________________________ 29 patch to subprocess docs to better explain Popen's 'args' argum 167 days closed http://bugs.python.org/issue6760 15 Serious interpreter crash and/or arbitrary memory leak using .r 309 days open http://bugs.python.org/issue5677 13 Test suite emits many DeprecationWarnings when -3 is enabled 119 days open http://bugs.python.org/issue7092 9 Add test cases for ctypes/winreg for issues found in IronPython 1 days open http://bugs.python.org/issue7855 9 improved allocation of PyUnicode objects 257 days open http://bugs.python.org/issue1943 8 Fix complex type to avoid coercion in 2.7. 360 days open http://bugs.python.org/issue5211 7 support caching for 2to3 5 days open http://bugs.python.org/issue7826 6 Undocumented subprocess functions on Windows 3 days open http://bugs.python.org/issue7838 6 decimal.py: type conversion in context methods 32 days open http://bugs.python.org/issue7633 6 MemoryView_FromObject crashes if PyBuffer_GetBuffer fails 71 days closed http://bugs.python.org/issue7385

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Fixed URL to 2.6 documentation
by anatoly techtonik 05 Feb '10

05 Feb '10

Greetings, I'm writing a module for current Python 2.6 and I would like to reference documentation for Python 2.6, because I am not sure if behavior won't be changed in further series. So far I can link only to: http://docs.python.org/ (stable, 2.6) http://docs.python.org/dev/ (2.7) http://docs.python.org/dev/py3k/ When stable changes to 2.7 my reference will point to the different version than I was meant when writing comment. It is possible to link to docs for minor 2.6.4 http://www.python.org/doc/2.6.4/ but I would like to link to latest version of docs in 2.6 branch that may not yet found way into official minor release. -- anatoly t.

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Re: [Python-Dev] Python 2.6.5
by Barry Warsaw 04 Feb '10

04 Feb '10

On Feb 03, 2010, at 11:50 PM, Ronald Oussoren wrote: >> Barry's answer was "yes" back in October. > >I will backport the patch if Barry says it's fine. Feel free to ping me if >that doesn't happen before the end of next week. I still think this should go in 2.6.5. The patch does not apply to the current 2.6 branch because of changes in setup.py. If the patch is ported, reviewed and works with no regressions (when libreadline is both installed on OS X 10.5 and 10.6 or not), then I'm okay with this going in. I've made it a release blocker for 2.6.5 for now. -Barry

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Re: [Python-Dev] python -U
by Barry Warsaw 04 Feb '10

04 Feb '10

On Feb 03, 2010, at 08:52 PM, Martin v. Löwis wrote: >>> As an aside, I think this should be documented *somewhere* other than >>> just in import.c! I'd totally forgotten about it until I read the >>> source and almost missed it. Either it should be documented or it >>> should be ripped out. >> >> The -U option is already gone in 3.x. > >Precisely my view. I took the "or document it" approach. http://bugs.python.org/file16127/7847.patch http://bugs.python.org/issue7847 -Barry

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Re: [Python-Dev] Forking and Multithreading - enemy brothers
by Pascal Chambon 04 Feb '10

04 Feb '10

Matt Knox a écrit : > Jesse Noller <jnoller <at> gmail.com> writes: > > >> We already have an implementation that spawns a >> subprocess and then pushes the required state to the child. The >> fundamental need for things to be pickleable *all the time* kinda >> makes it annoying to work with. >> >> > > just a lurker here... but this topic hits home with me so thought I'd chime > in. I'm a windows user and I would *love* to use multiprocessing a lot more > because *in theory* it solves a lot of the problems I deal with very nicely > (lot sof financial data number crunching). However, the pickling requirement > makes it very very difficult to actually get any reasonably complex code to > work properly with it. > > A lot of the time the functions I want to call in the spawned processes are > actually fairly self contained and don't need most of the environment of the > parent process shoved into it, so it's annoying that it fails because some data > I don't even need in the child process can't be pickled. > > What about having an option to skip all the parent environment data pickling > and require the user to manually invoke any imports that are needed in the > target functions as the first step inside their target function? > > for example... > > def target_function(object_from_module_xyz): > import xyz > return object_from_module_xyz.do_something() > > and if I forgot to import all the stuff necessary for the arguments being > passed into my function to work, then it's my own problem. > > Although maybe there is some obvious problem with this that I am not seeing. > > Anyway, just food for thought. > > - Matt > > Hello I don't really get it there... it seems to me that multiprocessing only requires picklability for the objects it needs to transfer, i.e those given as arguments to the called function, and thsoe put into multiprocessing queues/pipes. Global program data needn't be picklable - on windows it gets wholly recreated by the child process, from python bytecode. So if you're having pickle errors, it must be because the "object_from_module_xyz" itself is *not* picklable, maybe because it contains references to unpicklable objets. In such case, properly implementing pickle magic methods inside the object should do it, shouldn't it ? Regards, Pascal

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Re: [Python-Dev] __file__
by Nick Coghlan 04 Feb '10

04 Feb '10

Brett Cannon wrote: > But what does "expected location" mean? If I am importing foo.bar > where foo.__path__ has multiple path entries, which one is supposed to > be used to set the hypothetical location of source for __file__? I > guess going with the first one would be somewhat reasonable, but it's > definitely a guess. No, it wouldn't be a guess, it would be based on where the compiled bytecode was actually found (wherever in foo.__path__ that may have been). So __file__ would be the same regardless of whether or not the source code was actually physically present or not. __compiled__ would be set only if the code being executed was read from that file rather than from __file__. Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia ---------------------------------------------------------------

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Re: [Python-Dev] The fate of the -U option
by Barry Warsaw 04 Feb '10

04 Feb '10

On Feb 03, 2010, at 09:55 AM, Guido van Rossum wrote: >On Wed, Feb 3, 2010 at 9:09 AM, Barry Warsaw <barry(a)python.org> wrote: >> -----snip snip----- >> from __future__ import unicode_literals >> >> def func(foo, bar): >> print foo, bar >> >> kw = {'foo': 7, 'bar': 9} >> func(**kw) >> -----snip snip----- >> >> That will raise a TypeError in 2.6 but works in 2.7. Is it appropriate and >> feasible to back port that to Python 2.6? I remember talking about this a >> while back but I don't remember what we decided and I can't find a bug on the >> issue. > >I don't know about feasible but I think it's (borderline) appropriate. >There are various other paths that lead to this error and it feels to >me it's just a long-standing bug that we never took care of until 2.7. >However, I don't think it needs to support non-ASCII characters in the >keywords (even though 2.7 does seem to support those). The back port from trunk of r68805 to fix this was really pretty trivial. http://bugs.python.org/issue4978 http://bugs.python.org/file16124/py26-backport.patch Assigned to Benjamin for review. -Barry

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