Mailman 3 October 2008 - Python-Dev

porting pycxx and pysvn to python 3.0 hit a problem
by Barry Scott Oct. 7, 2008

Oct. 7, 2008

I have a version of PyCXX ported to python 3.0 rc1 and its passing its tests. I'm porting pysvn to python 3.0 rc1 and hit an odd problem. Given this dict: wc_status_kind_map = { pysvn.wc_status_kind.added: 'A', pysvn.wc_status_kind.replaced: 'R', pysvn.wc_status_kind.unversioned: '?', } This fails: wc_status_kind_map[ pysvn.wc_status_kind.unversioned ] With: KeyError: <wc_status_kind.unversioned> Clearly I have a bug in the implementation of pysvn.… [View More]wc_status_kind and could do with some suggestions on what to check please. I've assumed that if my objects support tp_hash and tp_compare they can be used as keys to a dictionary. My test scripts shows hash() and cmp() working. Why does "key in wc_status_kind_wc" work when I use an object returned by keys() by not when I use pysvn.wc_status_kind.unversioned? Barry --------- a.py -------- import pysvn wc_status_kind_map = { pysvn.wc_status_kind.replaced: 'R', pysvn.wc_status_kind.unversioned: 'U', } print( 'hash wc_status_kind', hash( "wc_status_kind" ) ) print( 'hash replace', hash( pysvn.wc_status_kind.replaced ) ) print( 'hash unversioned', hash( pysvn.wc_status_kind.unversioned ) ) print( 'cmp unversioned, unversioned', cmp ( pysvn.wc_status_kind.unversioned, pysvn.wc_status_kind.unversioned ) ) print( 'cmp unversioned, replaced', cmp ( pysvn.wc_status_kind.unversioned, pysvn.wc_status_kind.replaced ) ) print( 'cmp replaced, unversioned', cmp ( pysvn.wc_status_kind.replaced, pysvn.wc_status_kind.unversioned ) ) for key in wc_status_kind_map.keys(): print( '1 key', key, key in wc_status_kind_map, cmp( key, pysvn.wc_status_kind.unversioned ), hash( key ) ) try: print( '1 lookup', wc_status_kind_map[ key ] ) except: print( '1 failed' ) for key in [pysvn.wc_status_kind.added, pysvn.wc_status_kind.replaced, pysvn.wc_status_kind.unversioned]: print( '2 key', key, key in wc_status_kind_map, cmp( key, pysvn.wc_status_kind.unversioned ), hash( key ) ) try: print( '2 lookup', wc_status_kind_map[ key ] ) except: print( '2 failed' ) print( wc_status_kind_map[ pysvn.wc_status_kind.unversioned ] ) ------------ Output ------- $ python3.0 a.py hash wc_status_kind -586300918 hash replace -586300911 hash unversioned -586300916 cmp unversioned, unversioned 0 cmp unversioned, replaced -1 cmp replaced, unversioned 1 1 key replaced True 1 -586300911 1 lookup R 1 key unversioned True 0 -586300916 1 lookup U 2 key added False 1 -586300914 2 failed 2 key replaced False 1 -586300911 2 failed 2 key unversioned False 0 -586300916 2 failed Traceback (most recent call last): File "a.py", line 32, in <module> print( wc_status_kind_map[ pysvn.wc_status_kind.unversioned ] ) KeyError: <wc_status_kind.unversioned> [View Less]

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status of 2.5
by Neal Norwitz Oct. 7, 2008

Oct. 7, 2008

Should we plan to put out a final 2.5 release? If so, should we continue to backport fixes (like Martin's removal of Alpha in setup.py)? My preference is that we do put out a final 2.5 that has all accumulated bug fixes. Then close the branch. That way if we put out a security release for 2.5, it will be clean and easy. n

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I would like an Python account
by Victor Stinner Oct. 6, 2008

Oct. 6, 2008

Hi, Would it possible to get more permissions on Python bugtracker, especially to add keywords, close a duplicate bug, etc.? I also would like an SVN account for Python trunk and Python 3000 branch. I know that both branches are near "frozen" and commit are only allowed after patch review and/or discussion (on the mailing list or the bug tracker. So I will after the final versions (2.6 and 3.0) to commit. Or would it be possible to have a "mentor"? Someone to ask questions about Python … [View More]

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In Python 2.6, bytes is str (fwd)
by skip＠pobox.com Oct. 6, 2008

Oct. 6, 2008

Saw this on python-list. I suspect it's a known issue, but just in case, I thought I'd pass it along. Skip

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Re: [Python-Dev] if-syntax for regular for-loops
by Nick Coghlan Oct. 5, 2008

Oct. 5, 2008

Matthew Hawkins wrote: > If there's another way of doing this I'd like to hear it. The pass statement is still the right way to denote an empty block (the compiler is already able to detect that and optimise the code appropriately). My tangential comment was based on the fact that this keyword could, in theory, be replaced with the ellipsis notation often used in pseudo-code to denote "real code goes here". I don't think pursuing such a switch is actually a good idea - it was just odd to … [View More]

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Re: [Python-Dev] if-syntax for regular for-loops
by Vitor Bosshard Oct. 5, 2008

Oct. 5, 2008

----- Mensaje original ---- > De: Leif Walsh <leif.walsh(a)gmail.com> > Para: Andreas Nilsson <adde(a)trialcode.com> > CC: python-dev(a)python.org > Enviado: viernes, 3 de octubre, 2008 10:29:33 > Asunto: Re: [Python-Dev] if-syntax for regular for-loops > > On Fri, Oct 3, 2008 at 6:10 AM, Andreas Nilsson wrote: > > With that out of the way, on to todays subject: > > I use list comprehensions and generator expressions a lot and lately I've > > … [View More]

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Pickle, 3.0, and recursion
by Aaron Gallagher Oct. 4, 2008

Oct. 4, 2008

Hi, I posted a bug ticket on bugs.python.org, specifically #3119. Link: http://bugs.python.org/issue3119 The original issue is that the default Pickler can exceed the maximum recursion depth for structures that are fairly nested. There's a patch attached to the ticket that fixes this behavior by using a generator- based callstack. Unfortunately, this completely changes the API of Pickler. As far as I know, such major API changes would not be accepted in to 3.0 at this point. I tried … [View More]

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Doc nits question
by Jesse Noller Oct. 4, 2008

Oct. 4, 2008

So, we just released and there are a few doc typo bugs being filed - my question is if all doc-fixes have to wait for 2.6.1/2.7 or if we can hotfix the 2.6 docs? -jesse

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python-checkins seems broken
by Amaury Forgeot d'Arc Oct. 4, 2008

Oct. 4, 2008

Hello, I consult very regularly (100x a day) the python-checkins and python-300-checkins mailing list archives: http://mail.python.org/pipermail/python-checkins/2008-October/date.html#end http://mail.python.org/pipermail/python-3000-checkins/2008-October/date.htm… But they did not receive the svn checkins since Friday morning (CEST timezone). They do display the buildbot failures however. I miss these messages, they are for me the best way to keep in sync with the developments. (I think I … [View More]

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Re: [Python-Dev] Real segmentation fault handler
by Thomas Heller Oct. 4, 2008

Oct. 4, 2008

Victor Stinner schrieb: > Hi, > > I would like to be able to catch SIGSEGV in my Python code! So I started to > hack Python trunk to support this feature. The idea is to use a signal > handler which call longjmp(), and add setjmp() at Py_EvalFrameEx() enter. On windows, ctypes catches fatal errors (exception violations) in foreign function calls, thanks to windows structured exception handling. On other platforms, there is the WAD module by David Beazley which may do … [View More]

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