Mailman 3 September 2008 - Python-Dev

New proposition for Python3 bytes filename issue
by Victor Stinner Sept. 29, 2008

Sept. 29, 2008

Hi, After reading the previous discussion, here is new proposition. Python 2.x and Windows are not affected by this issue. Only Python3 on POSIX (eg. Linux or *BSD) is affected. Some system are broken, but Python have to be able to open/copy/move/remove files with an "invalid filename". The issue can wait for Python 3.0.1 / 3.1. Windows ------- On Windows, we might reject bytes filenames for all file operations: open(), unlink(), os.path.join(), etc. (raise a TypeError or UnicodeError) POSIX OS -------- The default behaviour should be to use unicode and raise an error if conversion to unicode fails. It should also be possible to use bytes using bytes arguments and optional arguments (for getcwd). - listdir(unicode) -> unicode and raise an error on invalid filename - listdir(bytes) -> bytes - getcwd() -> unicode - getcwd(bytes=True) -> bytes - open(): accept bytes or unicode os.path.*() should accept operations on bytes filenames, but maybe not on bytes+unicode arguments. os.path.join('directory', b'filename'): raise an error (or use *implicit* conversion to bytes)? When the user wants to display a filename to the screen, he can uses: text = str(filename, fs_encoding, "replace") -- Victor Stinner aka haypo http://www.haypocalc.com/blog/

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',' precedence in documentation
by C. Titus Brown Sept. 29, 2008

Sept. 29, 2008

Hi folks, over on the pygr list, we were recently discussing a mildly confusing edit I made: assert 'seq1' in self.db, self.db.keys() This was interpreted by someone as being assert 'seq1' in (self.db, self.db.keys()) which is very different from the actual meaning, assert ('seq1' in self.db), self.db.keys() where 'self.db.keys()' serves as the message to be printed out when the assertion fails. Apart from questions of why I was apparently out to confuse people with this edit, the question of ',' precedence came up. Looking at http://docs.python.org/ref/summary.html there's no mention of ',' binding and tuple creation vs the other operators. I'm not really sure how to think of it but it seems like this is something that could be cleared up in the docs with a brief note somewhere. Thoughts? cheers, --titus -- C. Titus Brown, ctb(a)msu.edu

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Broken link to NASM download location
by Ulrich Eckhardt Sept. 29, 2008

Sept. 29, 2008

Hi! In trunk/PCbuild/readme.txt it says NASM is available from kernel.org. The project has moved to Sourceforge though, please replace the link with http://nasm.sf.net Thanks! Uli -- Sator Laser GmbH Geschäftsführer: Thorsten Föcking, Amtsgericht Hamburg HR B62 932 ************************************************************************************** Visit our website at <http://www.satorlaser.de/> ************************************************************************************** Diese E-Mail einschließlich sämtlicher Anhänge ist nur für den Adressaten bestimmt und kann vertrauliche Informationen enthalten. Bitte benachrichtigen Sie den Absender umgehend, falls Sie nicht der beabsichtigte Empfänger sein sollten. Die E-Mail ist in diesem Fall zu löschen und darf weder gelesen, weitergeleitet, veröffentlicht oder anderweitig benutzt werden. E-Mails können durch Dritte gelesen werden und Viren sowie nichtautorisierte Änderungen enthalten. Sator Laser GmbH ist für diese Folgen nicht verantwortlich. **************************************************************************************

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Re: [Python-Dev] [Python-3000] Filename as byte string in python 2.6 or 3.0?
by Victor Stinner Sept. 29, 2008

Sept. 29, 2008

Le Monday 29 September 2008 06:43:55, vous avez écrit : > It will make users happy, and it's simple enough to implement for > python 3.0. I dislike your argument. A "quick and dirty hack" is always faster to implement than a real solution, but we may hits later new issues if we don't choose the right solution. -- Victor Stinner aka haypo http://www.haypocalc.com/blog/

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Reminder: Python 2.6 final next Wednesday
by Barry Warsaw Sept. 29, 2008

Sept. 29, 2008

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 This is a reminder that Python 2.6 final is schedule for release next Wednesday, October 1st. Once again, I've gone through the release blocker issues and knocked anything that doesn't specifically affect 2.6 to deferred blocker. This leaves us with 7 open blocking issues. Please spend some time over the next several days reviewing patches, making comments and working toward closing these issues. Email me directly if you have any questions, or ping me on irc. Unfortunately, my 'net connection may be a little bit flakey until Wednesday, but I will do my best to get online and follow up as needed. Please pitch in to help get Python 2.6 released on time! Thanks, - -Barry -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Darwin) iQCVAwUBSN1hJnEjvBPtnXfVAQIQfQQAgYr0tuzJhm3LZX/1SaCwRJcX09UvNH1I CjZHs2TKS22MjF9d3mmBgcEJPl9AwGE+6EF6OiSgrsNRoRtnN0MMT3nQo+deRkan P3jUgMFJMFkA7Uq5MmuNnEnKZXa/bsu/8Om/4wqHqvtDXbUQkZPfyE8BFwBzJJSM Aa6Wp3wieFs= =r4iD -----END PGP SIGNATURE-----

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call for help: C-API 2 to 3 porting guide
by Benjamin Peterson Sept. 28, 2008

Sept. 28, 2008

Hi guys, I remember a while back we were bemoaning the fact that little documentation exists for the extension module transition between 2.x and 3.x. In the name of this effort, I've created a c porting howto (Doc/howto/cporting.rst). I have started a few sections, but I can't do it all alone. Please consider writing a section. -- Cheers, Benjamin Peterson "There's no place like 127.0.0.1."

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PyCon 2009 Call for Proposals
by Aahz Sept. 28, 2008

Sept. 28, 2008

Call for proposals -- PyCon 2009 -- <http://us.pycon.org/2009/> =============================================================== Want to share your experience and expertise? PyCon 2009 is looking for proposals to fill the formal presentation tracks. The PyCon conference days will be March 27-29, 2009 in Chicago, Illinois, preceded by the tutorial days (March 25-26), and followed by four days of development sprints (March 30-April 2). Previous PyCon conferences have had a broad range of presentations, from reports on academic and commercial projects to tutorials and case studies. We hope to continue that tradition this year. Online proposal submission will open on September 29, 2008. Proposals will be accepted through November 03, with acceptance notifications coming out on December 15. For the detailed call for proposals, please see: <http://us.pycon.org/2009/conference/proposals/> We look forward to seeing you in Chicago! -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ "Argue for your limitations, and sure enough they're yours." --Richard Bach

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json decoder speedups, any time left for 2.6?
by Bob Ippolito Sept. 27, 2008

Sept. 27, 2008

I'm out of town this week for a conference (ICFP/CUFP in Victoria) and my hotel's connection has been bad enough such that I can't get any Real Work done so I've managed to hammer on the json library's decoding quite a bit instead. I just released simplejson 1.9.3 which improves decoding performance by about 2x and I've got some more changes along the way in trunk for 1.9.4 that will increase it even further (over 3x my original 1.9.2 benchmark perf). How much time do I have left to get this into Python 2.6? FWIW the changes are all on the Python side, no C code has been harmed (yet). The test suite still passes of course. -bob

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2to3 and reST text format
by Victor Stinner Sept. 27, 2008

Sept. 27, 2008

Hi, As I remember, last month 2to3 was able to fix my reST documentation using "-d" option. But trunk version fails to parse my reST documents. Should I run fsck on my brain or is it really a regression? Short example: ----------------- Title ===== Some text before the example: >>> print "Hello world!" Hello world! Verbatim block: :: >>> print "Hello world!" Hello world! ----------------- The document can be checked with: python2.5 -c "import doctest; doctest.testfile('test.rst')" 2to3 output: ----------------- $ 2to3 -d test.rst (...) RefactoringTool: Can't parse test.rst: ParseError: bad input: type=28, value='==', context=('', (2, 0)) (...) ----------------- -- Victor Stinner aka haypo http://www.haypocalc.com/blog/

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Summary of Python tracker Issues
by Python tracker Sept. 26, 2008

Sept. 26, 2008

ACTIVITY SUMMARY (09/19/08 - 09/26/08) 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. 2052 open (+35) / 13746 closed (+32) / 15798 total (+67) Open issues with patches: 660 Average duration of open issues: 713 days. Median duration of open issues: 1818 days. Open Issues Breakdown open 2037 (+34) pending 15 ( +1) Issues Created Or Reopened (69) _______________________________ turtle in the tkinter package? 09/20/08 CLOSED http://bugs.python.org/issue3884 reopened loewis patch subprocess failing in GUI applications on Windows 09/21/08 http://bugs.python.org/issue3905 reopened georg.brandl Building PDF documentation from tex files 09/19/08 http://bugs.python.org/issue3909 created wplappert 2.6 regression in socket.ssl method 09/19/08 http://bugs.python.org/issue3910 created matejcik patch ftplib.FTP.makeport() bug 09/19/08 http://bugs.python.org/issue3911 created giampaolo.rodola patch unittest. assertAlmostEqual() documentation incomplete 09/20/08 CLOSED http://bugs.python.org/issue3912 created roysmith patch compound_stmt syntax includes 'decorated' 09/20/08 CLOSED http://bugs.python.org/issue3913 created dangyogi augop definition does not include "//=" 09/20/08 CLOSED http://bugs.python.org/issue3914 created dangyogi Broken link in 14.7 curses, Python Library Reference 09/20/08 CLOSED http://bugs.python.org/issue3915 created jasoneth layout of build directories for Windows not current 09/20/08 CLOSED http://bugs.python.org/issue3916 created gagenellina patch set_display definition allows empty '{' '}' in Language Definiti 09/21/08 CLOSED http://bugs.python.org/issue3917 created dangyogi random.uniform suprisingly (good kind) does not work as document 09/21/08 CLOSED http://bugs.python.org/issue3918 created xuinkrbin PySys_SetObject crashes after Py_NewInterpreter(). 09/21/08 CLOSED http://bugs.python.org/issue3919 created grahamd OpenBSD 4.4 still doesn't support _XOPEN_SOURCE 09/21/08 http://bugs.python.org/issue3920 created loewis patch, needs review smtplib cannot sendmail over TLS 09/21/08 http://bugs.python.org/issue3921 created shidot 3.0rc1 missing tk lib in sys.path? 09/21/08 CLOSED http://bugs.python.org/issue3922 created jmfauth 'genexpr_for' in definition of 'call' in Language Reference. 09/21/08 CLOSED http://bugs.python.org/issue3923 created dangyogi cookielib chokes on non-integer cookie version, should ignore it 09/21/08 http://bugs.python.org/issue3924 created DenNukem test_distutils fails on cygwin 09/21/08 CLOSED http://bugs.python.org/issue3925 created ocean-city patch, easy Idle doesn't obey the new improved warnings arguements 09/21/08 http://bugs.python.org/issue3926 created scott_daniels dummy multiprocessing needs to use properties 09/22/08 CLOSED http://bugs.python.org/issue3927 created benjamin.peterson patch os.mknod missing on Solaris 09/22/08 http://bugs.python.org/issue3928 created sandberg Incorrect exception raising in dbm.open on non-existing DB 09/22/08 CLOSED http://bugs.python.org/issue3929 created hagen patch, needs review urllib.request.urlopen() different on Windows than Linux 09/22/08 CLOSED http://bugs.python.org/issue3930 created mark codecs.charmap_build is untested and undocumented 09/22/08 http://bugs.python.org/issue3931 created fijal HTMLParser cannot handle '&' and non-ascii characters in attribu 09/22/08 http://bugs.python.org/issue3932 created yanne presence of .pythonstartup.py causes __main__.__file__ to be set 09/22/08 CLOSED http://bugs.python.org/issue3933 created exarkun sphinx - building muppy docs fails on Linux 09/22/08 CLOSED http://bugs.python.org/issue3934 created robwolfe patch bisect insort C implementation ignores methods on list subclasse 09/22/08 http://bugs.python.org/issue3935 created jek Faulty suppression of 'as' keyword warning 09/22/08 CLOSED http://bugs.python.org/issue3936 created tjreedy patch platform.dist(): detect Linux distribution version in a robust, 09/22/08 CLOSED http://bugs.python.org/issue3937 created zooko patch Clearing globals; interpreter -- IDLE difference 09/22/08 http://bugs.python.org/issue3938 created tjreedy Patch to implement a real ftplib test suite 09/22/08 http://bugs.python.org/issue3939 created giampaolo.rodola patch turtle.py - minor bugfixes 09/23/08 CLOSED http://bugs.python.org/issue3940 created gregorlingl patch Help in IDLE should open the chm file 09/23/08 http://bugs.python.org/issue3941 created gregorlingl Usability issue from not being able to use defined start and end 09/23/08 CLOSED http://bugs.python.org/issue3942 created Mez IDLE won't start in 3.0rc1 "Subprocess didn't make connection... 09/23/08 CLOSED http://bugs.python.org/issue3943 created rbtyod faster long multiplication 09/23/08 http://bugs.python.org/issue3944 created pernici patch compile error in _fileio.c (cygwin) 09/23/08 CLOSED http://bugs.python.org/issue3945 created ocean-city patch, easy PyObject_CheckReadBuffer crashes on memoryview object 09/23/08 http://bugs.python.org/issue3946 created rupole patch, needs review configure --with-threads on cygwin => crash on thread related te 09/23/08 http://bugs.python.org/issue3947 created ocean-city readline steals sigwinch 09/23/08 http://bugs.python.org/issue3948 created shish curses' sigwinch handler isn't visible from python 09/23/08 http://bugs.python.org/issue3949 created shish turtle.py: bug in TurtleScreenBase._drawimage 09/23/08 CLOSED http://bugs.python.org/issue3950 created gregorlingl patch Disable Py_USING_MEMORY_DEBUGGER! 09/24/08 http://bugs.python.org/issue3951 created haypo patch _lsprof: clear() should call flush_unmatched() 09/24/08 http://bugs.python.org/issue3952 created haypo patch __cmp__ still documented in 3.0rc1? 09/24/08 CLOSED http://bugs.python.org/issue3953 created hniksic _hotshot: invalid error control in logreader() 09/24/08 http://bugs.python.org/issue3954 created haypo patch maybe doctest doesn't understand unicode_literals? 09/24/08 http://bugs.python.org/issue3955 created mark turtle.py - bug in Screen.__init__() 09/24/08 http://bugs.python.org/issue3956 created gregorlingl patch [contextlib] Reverse order of locking 09/24/08 http://bugs.python.org/issue3957 created DragonSA strage default value behaviour 09/24/08 CLOSED http://bugs.python.org/issue3958 created dominik.holler Add Google's ipaddr.py to the stdlib 09/24/08 http://bugs.python.org/issue3959 created gvanrossum Section permalink html anchors are wrong 09/25/08 CLOSED http://bugs.python.org/issue3960 created ronny Arrows key do not browse in the IDLE 09/25/08 http://bugs.python.org/issue3961 created italian-boy single architecture framework build fails on OS X 10.5 09/25/08 http://bugs.python.org/issue3962 created cekees Problems when calling exec from a function 09/25/08 CLOSED http://bugs.python.org/issue3963 created sandberg quiet the freeze makefile 09/25/08 http://bugs.python.org/issue3964 created docwhat patch 2.6rc2 crashes when trying to open unicode filename with unprint 09/25/08 CLOSED http://bugs.python.org/issue3965 created giltay patch Win32ErrorTests from test_os.py 09/25/08 http://bugs.python.org/issue3966 created rpetrov bytearray().count() 09/25/08 http://bugs.python.org/issue3967 created haypo patch, needs review turtle.py: fill() and end_fill() do not work correctly 09/25/08 CLOSED http://bugs.python.org/issue3968 created gregorlingl patch turtle.py - setup() doesn't work correctly 09/25/08 CLOSED http://bugs.python.org/issue3969 created gregorlingl patch Tix Tree widget no longer instantiable. 09/26/08 CLOSED http://bugs.python.org/issue3970 created ronLongo s_push: parser stack overflow MemoryError 09/26/08 http://bugs.python.org/issue3971 created netcaf Add Option to Bind to a Local IP Address in httplib.py 09/26/08 http://bugs.python.org/issue3972 created eldonz(a)atlanticdb.com patch Invalid line number in Exception traceback with header # -*- cod 09/26/08 CLOSED http://bugs.python.org/issue3973 created haypo collections.namedtuple uses exec to create new classes 09/26/08 http://bugs.python.org/issue3974 created audax patch PyTraceBack_Print() doesn't respect # coding: xxx header 09/26/08 http://bugs.python.org/issue3975 created haypo Issues Now Closed (55) ______________________ Incorrectly displayed non ascii characters in prompt using "inpu 274 days http://bugs.python.org/issue1688 amaury.forgeotdarc patch ctypes.wstring_at and string_at call Python API without the GIL 40 days http://bugs.python.org/issue3554 haypo subprocess + stdout redirection + wait + svn= hang 34 days http://bugs.python.org/issue3593 gregory.p.smith IDLE does not run with Py30b3 30 days http://bugs.python.org/issue3628 benjamin.peterson Duplicated test name in regex test script 29 days http://bugs.python.org/issue3654 timehorse sqlite: enumeration value 'TYPE_STRING' not handled in switch 29 days http://bugs.python.org/issue3659 ghaering patch, easy atexit.register with bad input segfaults on exit 29 days http://bugs.python.org/issue3666 skip.montanaro patch Ignored LDFLAGS during linking libpython$(VERSION).so 27 days http://bugs.python.org/issue3678 gregory.p.smith patch, easy test_tarfile error on cygwin (Directory not empty) 10 days http://bugs.python.org/issue3838 ocean-city patch, easy kqueue.control requires 2 params while docs say max_events (the 8 days http://bugs.python.org/issue3852 georg.brandl patch provide a "cmem" role 9 days http://bugs.python.org/issue3875 georg.brandl 2.6 regression in urllib.getproxies_environment 5 days http://bugs.python.org/issue3879 benjamin.peterson patch, needs review turtle in the tkinter package? 2 days http://bugs.python.org/issue3884 kirill_simonov patch errors on _bsddb creation and dealloc 7 days http://bugs.python.org/issue3885 haypo patch, needs review Python 2.6 doesn't run after installation on amd64 3 days http://bugs.python.org/issue3887 jpe Demo/parser/unparse.py 4 days http://bugs.python.org/issue3889 georg.brandl patch collections.deque should have empty() method 2 days http://bugs.python.org/issue3891 rhettinger collections 3 days http://bugs.python.org/issue3897 georg.brandl Slight readme.txt fix (VC9) 3 days http://bugs.python.org/issue3901 georg.brandl patch Strange heapq behavior on Python 3.0 when overriding __le__ 0 days http://bugs.python.org/issue3908 giampaolo.rodola unittest. assertAlmostEqual() documentation incomplete 1 days http://bugs.python.org/issue3912 georg.brandl patch compound_stmt syntax includes 'decorated' 1 days http://bugs.python.org/issue3913 georg.brandl augop definition does not include "//=" 1 days http://bugs.python.org/issue3914 georg.brandl Broken link in 14.7 curses, Python Library Reference 1 days http://bugs.python.org/issue3915 georg.brandl layout of build directories for Windows not current 0 days http://bugs.python.org/issue3916 georg.brandl patch set_display definition allows empty '{' '}' in Language Definiti 0 days http://bugs.python.org/issue3917 georg.brandl random.uniform suprisingly (good kind) does not work as document 0 days http://bugs.python.org/issue3918 georg.brandl PySys_SetObject crashes after Py_NewInterpreter(). 1 days http://bugs.python.org/issue3919 benjamin.peterson 3.0rc1 missing tk lib in sys.path? 0 days http://bugs.python.org/issue3922 loewis 'genexpr_for' in definition of 'call' in Language Reference. 0 days http://bugs.python.org/issue3923 georg.brandl test_distutils fails on cygwin 0 days http://bugs.python.org/issue3925 ocean-city patch, easy dummy multiprocessing needs to use properties 1 days http://bugs.python.org/issue3927 benjamin.peterson patch Incorrect exception raising in dbm.open on non-existing DB 4 days http://bugs.python.org/issue3929 hagen patch, needs review urllib.request.urlopen() different on Windows than Linux 0 days http://bugs.python.org/issue3930 amaury.forgeotdarc presence of .pythonstartup.py causes __main__.__file__ to be set 0 days http://bugs.python.org/issue3933 loewis sphinx - building muppy docs fails on Linux 1 days http://bugs.python.org/issue3934 schuppenies patch Faulty suppression of 'as' keyword warning 3 days http://bugs.python.org/issue3936 benjamin.peterson patch platform.dist(): detect Linux distribution version in a robust, 1 days http://bugs.python.org/issue3937 lemburg patch turtle.py - minor bugfixes 0 days http://bugs.python.org/issue3940 loewis patch Usability issue from not being able to use defined start and end 0 days http://bugs.python.org/issue3942 benjamin.peterson IDLE won't start in 3.0rc1 "Subprocess didn't make connection... 3 days http://bugs.python.org/issue3943 amaury.forgeotdarc compile error in _fileio.c (cygwin) 0 days http://bugs.python.org/issue3945 ocean-city patch, easy turtle.py: bug in TurtleScreenBase._drawimage 1 days http://bugs.python.org/issue3950 georg.brandl patch __cmp__ still documented in 3.0rc1? 0 days http://bugs.python.org/issue3953 georg.brandl strage default value behaviour 0 days http://bugs.python.org/issue3958 dominik.holler Section permalink html anchors are wrong 1 days http://bugs.python.org/issue3960 ronny Problems when calling exec from a function 1 days http://bugs.python.org/issue3963 sandberg 2.6rc2 crashes when trying to open unicode filename with unprint 0 days http://bugs.python.org/issue3965 giltay patch turtle.py: fill() and end_fill() do not work correctly 0 days http://bugs.python.org/issue3968 georg.brandl patch turtle.py - setup() doesn't work correctly 0 days http://bugs.python.org/issue3969 georg.brandl patch Tix Tree widget no longer instantiable. 0 days http://bugs.python.org/issue3970 amaury.forgeotdarc Invalid line number in Exception traceback with header # -*- cod 0 days http://bugs.python.org/issue3973 pitrou SRE: x++ isn't supported 2658 days http://bugs.python.org/issue433031 georg.brandl have a way to search backwards for re 2413 days http://bugs.python.org/issue516762 benjamin.peterson Add current dir when running try_run test program 1282 days http://bugs.python.org/issue1168055 lianos patch Top Issues Most Discussed (10) ______________________________ 20 Regexp 2.7 (modifications to current re 2.2.2) 164 days open http://bugs.python.org/issue2636 11 Major reworking of Python 2.5.2 re module 17 days open http://bugs.python.org/issue3825 11 Failed to build Python 2.5.1 with sqlite3 521 days open http://bugs.python.org/issue1706863 10 zero-length match confuses re.finditer() 606 days open http://bugs.python.org/issue1647489 9 26.rc1: test_signal issue on FreeBSD 6.3 12 days open http://bugs.python.org/issue3864 9 test_tarfile fails on cygwin (unicode decode error) 17 days open http://bugs.python.org/issue3824 9 Ctypes is confused by bitfields of varying integer types 45 days open http://bugs.python.org/issue3547 8 subprocess failing in GUI applications on Windows 5 days open http://bugs.python.org/issue3905 8 platform.dist() has unpredictable result under Linux 338 days open http://bugs.python.org/issue1322 7 Faulty suppression of 'as' keyword warning 3 days closed http://bugs.python.org/issue3936

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preliminary findings of compiling python to javascript and running it under google "V8"
by Luke Kenneth Casson Leighton Sept. 26, 2008

Sept. 26, 2008

http://groups.google.com/group/pyjamas-dev/browse_thread/thread/5e14ac70508… may be of interest to some people.

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Update to httplib.py
by Eldon Ziegler Sept. 25, 2008

Sept. 25, 2008

I updated httplib.py, python 2.4, to be able to bind to a specific IP address when connecting to a remote site. Would there be any interest in making this available to others? If so, are there instructions on how to post an update? Eldon Ziegler

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okay to add new test cases to 2.6?
by skip＠pobox.com Sept. 23, 2008

Sept. 23, 2008

Benjamin Peterson wound up writing a test case for the new C atexit module on the py3k branch. A similar test, though different in detail, makes sense for the Python atexit module on trunk. Is this something I can check in or should I just wait until after 2.6 is released? def test_badargs(self): s = StringIO.StringIO() sys.stdout = sys.stderr = s save_handlers = atexit._exithandlers atexit._exithandlers = [] try: atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0) self.assertRaises(TypeError, atexit._run_exitfuncs) finally: sys.stdout = sys.__stdout__ sys.stderr = sys.__stderr__ atexit._exithandlers = save_handlers Thx, Skip

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Status of dictnotes.txt?
by Brendan O'Connor Sept. 23, 2008

Sept. 23, 2008

Hi everyone, I was enjoying reading Raymond Hettinger's Objects/dictnotes.txt, and was wondering, which (if any) of its suggestions implemented? I see most of it was written back in 2003. Thanks, Brendan

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Release blocker with no assignee (now me)
by skip＠pobox.com Sept. 22, 2008

Sept. 22, 2008

Can someone comment on this ticket? http://bugs.python.org/issue3666 It's marked as a release blocker for 3.0. I added a patch then refined it based on a comment by Christian Heimes. It was unassigned. I just took it and will apply the patch if it gets a thumbs up from another developer. Skip

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Patch review needed
by Jesus Cea Sept. 22, 2008

Sept. 22, 2008

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Sorry to bother you, but I would like a patch review, since this code must be merged for 2.6. http://bugs.python.org/issue3885 Thanks in advance. - -- Jesus Cea Avion _/_/ _/_/_/ _/_/_/ jcea(a)jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ jabber / xmpp:jcea@jabber.org _/_/ _/_/ _/_/_/_/_/ . _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQCVAwUBSNfaK5lgi5GaxT1NAQJCOAP+IVtGPcjjzWT/AefvEzxPajRmqf0H+MVn 5TO0STwkWuJHyYdv/z4OtA9UD6NTQ3Z4gLPOc5ZwlvhTW1gd856IBhVEFy1JARoJ ZERR7cp/WcdUSksHlC5qgTd2ZD1Y1VYcgCwTkL59D8R7I2wq752om6ZzhKs3SKC7 SG8kLYMlo9I= =P9mB -----END PGP SIGNATURE-----

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Python documentation
by Barry Warsaw Sept. 22, 2008

Sept. 22, 2008

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Martin points out that in the past, as part of the release process, we've built separate downloadable documentation. Do we still want to do that for Python 2.6 and 3.0, and if so, how do we go about doing that? I have this feeling that building the documentation is much different now than in the past, and I don't really have a good feel for how it's done now. If you think we should release separate downloadable documentation and can help integrate that into the release project, you just might be a Documentation Expert <wink>. Please let me know if you can help. - -Barry -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Darwin) iQCVAwUBSNOLBnEjvBPtnXfVAQIQnAQAm6thEThGufep6hzHxBwAN8MTsLb9jxsu Z8GAtX1bdMNOrJczYpU6by0oXPLR2pupnGV1YrAyQyoqpk+K7W8by5Qtg8+ZZcYH GerkqMVtNYn2zY1HhKigivp2JvlqIidRc5D36XS2EJixhZEPcOQDVm34THNQyRJT QasCQwdSAHI= =MbMY -----END PGP SIGNATURE-----

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turtle.Screen.__init__ issue
by Gregor Lingl Sept. 22, 2008

Sept. 22, 2008

Hello there, its high time to resolve an issue, which I have already addressed twice some weeks ago. (You can find a more elaborate description in my former posting cited below) There is a tiny difference (also in behaviour!) in turtle.Screen.__init__() between the versions for 2.6 and 3.0. The difference results from the fact, that I submitted the 3.0 version approx. a week later, after having it ported to 3.0. In this process I had found what I now consider to be a bug in 2.6 and changed it accordingly. Shortly: If you have already a Screen object containing some turtles and some graphics, in 2.6: s = Screen() returns an object with identical state and behaviour, but clears (re-initializes) the screen and thus destroys the content in 3.0 s = Screen() returns an object with identical state and behaviour, but leaves the content untouched The difference in code consist only in indenting the call of the __init__ method of the parent class, so it will be executed only conditionally. Anyway, as this difference between the two versions is highly undesirable there are (imho) three options to proceed: (1) correct 2.6 in order that it will work like 3.0 (2) undo the change in 3.0 in order that it will work like 2.6 (3) find a different solution for both I would (like Vern, see below) decisevely prefer option (1), and I suppose that there is not enough time left to chose option (3) as this would probably need some discussions. What is your opinion, and who should decide? For your convenience I've attached a diff-file which also contains the description of three other small bugs, which I've found in the meantime and which shouldn't cause any controversies. Regards, Gregor %%%%%%%%%% Here follows the answer of Vern Ceder - a long term turtle graphics user and author of several patches for the old turtle module - to my former posting: >> Gregor, >> >> I don't feel authoritative on the correctness/appropriateness of the implementation, >> but I do agree completely that behavior b, or what you have in the 3.0 version, >> is vastly preferable. >> >> Cheers, >> Vern -------- Original-Nachricht -------- Betreff: [Python-Dev] turtle.Screen- how to implement best a Singleton Datum: Mon, 18 Aug 2008 10:15:45 +0200 Von: Gregor Lingl <gregor.lingl(a)aon.at> An: python-dev(a)python.org CC: Toby Donaldson <tjd(a)sfu.ca>, python-3000(a)python.org, jjposner(a)snet.net, Brad Miller <bonelake(a)gmail.com>, Vern Ceder <vceder(a)canterburyschool.org> Hi, this posting - concerning the new turtle module - goes to the Python-Dev and Python-3000 lists and to a couple of 'power users' of turtle graphics, hoping to recieve feedback from the developer's point of view as well as from the user's point of view. Currently the implementations of the turtle.Screen class for Python 2.6 and Python 3.0 differ by a 'tiny' detail with an important difference in behaviour. So clearly this has to be resolved before the final release.(The origin of this difference is, that when I ported turtle.py to Python 3.0 I discovered (and 'fixed') what I now consider to be a bug in the 2.6 version.) I'd like to ask you kindly for your advice to achieve an optimal solution. The posting consists of three parts: 1. Exposition of design goals 2. Problem with the implementation 3. How to solve it? Preliminary remark: I've had some discussions on this topic before but I still do not see a clear solution. Moreover I'm well aware of the fact that using the Singleton pattern is controversial. So ... 1. Exposition of design goals ... why use the Singleton design pattern? The turtle module contains a TurtleScreen class, which implements methods to control the drawing area the turtle is (turtles are) drawing on. It's constructor needs a Tkinter Canvas as argument. In order to avoid the need for users to tinker around with Tkinter stuff there is the Screen(TurtleScreen) class, designed to be used by beginners(students, kids,...), particularly in interactive sessions. A (THE (!)) Screen object is essentially a window containing a scrolled canvas, the TurtleScreen. So it's a ressource which should exist only once. It can be constructed in several ways: - implicitely by calling an arbitrary function derived from a Turtle-method, such as forward(100) or by constructing a Turtle such as bob = Turtle() - implicitely by calling an arbitrary function derived from a Screen method, such as bgcolor("red") - explicitely by calling it's constructor such as s = Screen() Anyway this construction should only happen if a Screen object doesn't exist yet. Now for the pending question: What should happen, when s = Screen() is called explicitely and there exists already 'the' Screen object. (i) Clearly s should get a reference to the existing Screen object, but ... (ii) (a)... should s be reinitialized (this is the case now in Python 2.6), or (b)... should s be left untouched (this is the case now in Python 3.0) I, for my part, prefer the latter solution (b). Example: a student, having (interactively) produced some design using some turtle t = Turtle() decides spontaneously to change backgroundcolor. s = Screen(); s.bgcolor("pink") should do this for her - instead of deleting her design and moreover her turtle. To reinitialize the screen she still can use s.clear(). Of course, there are workarounds to achieve the same effect also with solution (a), for instance by assigning s = Screen() *before* drawing anything or by assigning s = t.getscreen(). But imho (which derives itself from my experience as a teacher) solution (b) supports better the oop-view as well as experimenting spontaneously in interactive sessions. 2. Problem with the implementation The task is to derive a Singleton class from a Nonsingleton class (Screen from TurtleScreen). The current implementations of the Screen 'Singleton' both use the Borg idiom. Just for *explaining* the difference between the two versions of class Screen here concisely, I'll use a 'standard' Singleton pattern (roughly equivalent to the Borg idiom): class Spam(object): def __init__(self, s): self.s = s class SingleSpam(Spam): _inst = None def __new__(cls, *args, **kwargs): if cls != type(cls._inst): cls._inst = Spam.__new__(cls, *args, **kwargs) return cls._inst def __init__(self, s): if vars(self): return ###### should this be here??? Spam.__init__(self, s) Shortly, this means that SingleSpam.__init__() acts like an empty method whenever a (the!) SingleSpam object already exists. 3.0 version of Screen acts like this. By contrast 2.6 version of Screen acts as if the butlast line were not there and thus reinitializes the Screen object. 3. How to solve it? Main question: which *behaviour* of the Screen class should be preferred. If 3.0, is it feasible and correct not to call the constructor of the parent class if the object already exists? Additional question: Do you consider the Borg idiom a good solution for this task or should the standard singleton pattern as shown above be preferred. Or would you suggest a solution/an approach different from both? Thanks for your patience, and - in advance - for your assistance Regard, Gregor _______________________________________________ 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/gregor.lingl%40aon.at --- turtle26rc2.py Thu Jun 12 20:39:36 2008 +++ turtle.py Mon Sep 22 00:02:25 2008 @@ -359,7 +359,9 @@ def __init__(self, master, width=500, height=350, canvwidth=600, canvheight=500): TK.Frame.__init__(self, master, width=width, height=height) - self._root = self.winfo_toplevel() + # renamed: self._root ==> self._rootwindow + # to avoid name conflict with TK.Frame method self._root + self._rootwindow = self.winfo_toplevel() self.width, self.height = width, height self.canvwidth, self.canvheight = canvwidth, canvheight self.bg = "white" @@ -379,7 +381,7 @@ self.hscroll.grid(padx=1, in_ = self, pady=1, row=1, column=0, rowspan=1, columnspan=1, sticky='news') self.reset() - self._root.bind('<Configure>', self.onResize) + self._rootwindow.bind('<Configure>', self.onResize) def reset(self, canvwidth=None, canvheight=None, bg = None): """Ajust canvas and scrollbars according to given canvas size.""" @@ -732,7 +734,7 @@ """Configure image item as to draw image object at position (x,y) on canvas) """ - self.cv.coords(item, (x, -y)) + self.cv.coords(item, (x * self.xscale, -y * self.yscale)) self.cv.itemconfig(item, image=image) def _setbgpic(self, item, image): @@ -3571,7 +3573,7 @@ self._root.setupcanvas(width, height, canvwidth, canvheight) Screen._canvas = self._root._getcanvas() self.setup(width, height, leftright, topbottom) - TurtleScreen.__init__(self, Screen._canvas) + TurtleScreen.__init__(self, Screen._canvas) Turtle._screen = self def setup(self, width=_CFG["width"], height=_CFG["height"], @@ -3612,6 +3614,7 @@ if starty is None: starty = (sh - height) / 2 self._root.set_geometry(width, height, startx, starty) + self.update() def title(self, titlestring): """Set title of turtle-window

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Possible issue in warnings.py
by Scott David Daniels Sept. 21, 2008

Sept. 21, 2008

Does someone who knows the design of warnings.py a bit better than I know whether it would be an improvement to switch from: > try: > file.write(formatwarning(message, category, filename, > lineno, line)) > except IOError: > pass # the file (probably stderr) is invalid > # - this warning gets lost. to: > complaint = formatwarning(message, category, filename, > lineno, line) > try: > file.write(complaint) > except IOError: > pass # the file (probably stderr) is invalid > # - this warning gets lost. on the grounds that you might not want failures in the linecache code to behave the same as failures in writing the complaint to the target area? I'm working on a patch where the Idle warnings code seems to accidentally escalating warnings into errors, and it looked to me like this would accidentally swallow errors getting warning context and make them fail silently. The Idle issue that I'm fiddling with is that it doesn't take the new showwarning call format, and it looked like this should possibly be fixed at the same time. --Scott David Daniels Scott.Daniels(a)Acm.Org

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Deploying a Python Service on Apache Axis2
by Heshan Suriyaarachchi Sept. 21, 2008

Sept. 21, 2008

Hi guys, Apache Axis2/Java, is a popular open source Web service engine. It currently supports exposing services written in Java, Javascript as Web services. This article [1] discusses the Python data Binding that enable exposing Web services written in Python. [1] - http://wso2.org/library/articles/deploying-python-service-axis2 [2] - http://heshans.blogspot.com/2008/09/wso2-wsfjython-10-alpha.html [3] - http://wso2.org/library/invoking-enterprise-web-services-using-jython -- Regards, Heshan Suriyaarachchi http://heshans.blogspot.com/

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how about updating PEP 290?
by Fredrik Lundh Sept. 21, 2008

Sept. 21, 2008

the "Code Migration and Modernization" PEP hasn't been updated for 2.5 and 2.6. http://www.python.org/dev/peps/pep-0290/ surely there's something new in 2.5 and 2.6 that might be worth mentioning? </F>

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bsddb tests disabled by default
by Jesus Cea Sept. 20, 2008

Sept. 20, 2008

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Just installing 2.6rc2, I see that bsddb3 testsuite is disabled by default. Current testsuite is far more fast and stable that the old one (entire test: 17 seconds in my machine). I was wondering if it is time to enable bsddb3 testsuite by default. BTW: How is a "resource" enabled by an user, without touching sourcecode?. - -- Jesus Cea Avion _/_/ _/_/_/ _/_/_/ jcea(a)jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ jabber / xmpp:jcea@jabber.org _/_/ _/_/ _/_/_/_/_/ . _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQCVAwUBSNJktZlgi5GaxT1NAQI7YQP+PwnNpfnJCsd3u/bAgjFQfHaRXMYlS1PN dZPb8lkzMbyanNituTC9VLxI97BXsSPSM7VNnbyO3lBVSvJxvsDaRDmoUynno+VX rw7+dD/mqKdyPujBjLzqYhbvQAoUOxLNac44/pTjvqoGiDa5CeR0AunUDnqnVVJa 4by7SBBxYrs= =sllZ -----END PGP SIGNATURE-----

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Code coverage
by Walter Dörwald Sept. 19, 2008

Sept. 19, 2008

Hello all! The code coverage site at http://coverage.livinglogic.de/ was broken for the last few months. It's fixed again now and runs the test suite once per day with regrtest.py -T -N -uurlfetch,largefile,network,decimal Servus, Walter

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What this code should do?
by Maciej Fijalkowski Sept. 19, 2008

Sept. 19, 2008

Hello, I'm a little clueless about exact semantics of following snippets: http://paste.pocoo.org/show/85698/ is this fine? or shall I fill the bug? (the reason to ask is because a) django is relying on this b) pypy implements it differently) cheers, fijal

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ANNOUNCE: CapPython, an object-capability subset of Python
by Mark Seaborn Sept. 19, 2008

Sept. 19, 2008

During the past couple of months I have been working on an object-capability subset of Python - in other words, a restricted execution scheme for sandboxing Python code. It has been influenced by other object-capability subset languages, such as Joe-E (a subset of Java [1]), Caja/Cajita (subsets of Javascript [2]) and Caperl (based on Perl [3]). I'm calling it CapPython because the name doesn't seem to have been taken yet. :-) I believe it is now secure, so it seems like a good time to announce it here! The basic idea behind CapPython is to enforce encapsulation by restricting access to private attributes of objects. This is achieved through a combination of static checking and limiting access to unsafe builtins and modules. Private attributes may only be accessed through "self" variables. "Self" variables are defined as being the first arguments of functions defined inside class definitions, with a few restrictions intended to prevent these functions from escaping without being safely wrapped. Private attribute names are those starting with "_". Additionally, "im_self", "im_func" and some other special cases are treated as private attributes. Assignments to attributes are only allowed via "self" variables. For example, the following code is accepted by the static verifier: class Counter(object): def __init__(self): self._count = 0 def get_next(self): self._count += 1 return self._count But the following code reads a private attribute and so it is rejected as violating encapsulation: counter._count -= 1 CapPython consists of three parts: - a static verifier; - a "safe exec" function, which will check code before executing it and can run code in a safe scope; - a module loader which implements a safe __import__ function. Eventually this will be runnable as untrusted CapPython code. I am documenting CapPython via my blog at the moment, with the following posts so far: http://lackingrhoticity.blogspot.com/2008/08/introducing-cappython.html http://lackingrhoticity.blogspot.com/2008/09/dealing-with-modules-and-built… http://lackingrhoticity.blogspot.com/2008/09/cappython-unbound-methods-and-… The code is available from a Bazaar repository on Launchpad: https://code.launchpad.net/cappython I am currently working on creating a simple example program, which will be a wsgiref-based web server with a form for executing CapPython code. This involves taming some of the standard libraries to pass the verifier. There are some design notes here - http://plash.beasts.org/wiki/CapPython - although these notes are more a list of references and problems CapPython needs to address than an explanation of the current design. There was also a thread about CapPython on the e-lang mailing list: http://www.eros-os.org/pipermail/e-lang/2008-August/012828.html Mark [1] http://code.google.com/p/joe-e/ [2] http://code.google.com/p/google-caja/ [3] http://caperl.links.org/

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