Mailman 3 October 2007 - Python-Dev

Summary of Tracker Issues
by Tracker Oct. 19, 2007

Oct. 19, 2007

ACTIVITY SUMMARY (10/12/07 - 10/19/07) 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. 1312 open (+23) / 11472 closed ( +5) / 12784 total (+28) Open issues with patches: 420 Average duration of open issues: 680 days. Median duration of open issues: 752 days. Open Issues Breakdown open 1307 (+23) pending 5 ( +0) Issues Created Or Reopened (28) _______________________________ doctest fails to run file based tests with 8bit paths 10/12/07 http://bugs.python.org/issue1274 created bear patch bsddb closing a DB object before all DBCursors using it are clos 10/12/07 http://bugs.python.org/issue1275 created gregory.p.smith LookupError: unknown encoding: X-MAC-JAPANESE 10/13/07 http://bugs.python.org/issue1276 created josm patch mailbox.Maildir: factory not used 10/14/07 http://bugs.python.org/issue1277 created bwurst imp.find_module() ignores -*- coding: Latin-1 -*- 10/15/07 http://bugs.python.org/issue1278 created tiran os.system() oddity under Windows XP SP2 10/15/07 http://bugs.python.org/issue1279 created pythonmeister PEP 3137: Make PyString's indexing and iteration return integers 10/15/07 http://bugs.python.org/issue1280 created alexandre.vassalotti patch typo in documentation - lib ref section 14.3.3.4 10/15/07 CLOSED http://bugs.python.org/issue1281 created bsherman re module needs to support bytes / memoryview well 10/15/07 http://bugs.python.org/issue1282 created gvanrossum PyBytes (buffer) .extend method needs to accept any iterable of 10/16/07 http://bugs.python.org/issue1283 created gregory.p.smith py3k typo in lib doc 7.3.2.1 MaildirMessage 10/16/07 http://bugs.python.org/issue1284 created encoded setp.py error "The process cannot access the file ..." 10/16/07 http://bugs.python.org/issue1285 created uweber4711 fileinput, StringIO, and cStringIO do not support the with proto 10/16/07 http://bugs.python.org/issue1286 created ygale os.environ.pop doesn't work 10/16/07 http://bugs.python.org/issue1287 created niemeyer dict.fromkeys - Odd logic when passing second dict.fromkeys as v 10/16/07 CLOSED http://bugs.python.org/issue1288 created dohertywa Typo in Context Manager Types 10/18/07 CLOSED http://bugs.python.org/issue1289 created nhaines xml.dom.minidom not able to handle utf-8 data 10/18/07 CLOSED http://bugs.python.org/issue1290 created sharmila test_resource fails on recent linux systems ( 10/18/07 http://bugs.python.org/issue1291 created doko libffi needs an update to support mips64, arm and armeabi on lin 10/18/07 http://bugs.python.org/issue1292 created doko Trailing slash in sys.path cause import failure 10/18/07 http://bugs.python.org/issue1293 created guillaumegirard Management of KeyboardInterrupt in cmd.py 10/18/07 http://bugs.python.org/issue1294 created stephbul patch logging records cache the result of formatException() 10/18/07 CLOSED http://bugs.python.org/issue1295 created theller patch optparse's OptionGroup not described 10/18/07 http://bugs.python.org/issue1296 created paulmelis pyconfig.h not compatible with MS VC++ Express Edition 10/18/07 http://bugs.python.org/issue1297 created weegreenblobbie Support for z/OS and EBCDIC. 10/18/07 http://bugs.python.org/issue1298 created lealanko distutils.sysconfig is not cross-platform compatible 10/18/07 http://bugs.python.org/issue1299 created weegreenblobbie subprocess.list2cmdline doesn't do pipe symbols 10/18/07 http://bugs.python.org/issue1300 created chops(a)demiurgestudios.com Bad assertion in _tkinter.c 10/18/07 http://bugs.python.org/issue1301 created thyrsus patch Issues Now Closed (18) ______________________ Idle - Save (buffer) - closes IDLE and does not save file (Windo 37 days http://bugs.python.org/issue1130 kbk py3k bsddb.dbshelve.DbShelf.append doesn't work 9 days http://bugs.python.org/issue1233 gregory.p.smith Removal of basestring type 6 days http://bugs.python.org/issue1258 gvanrossum patch PEP 3137: Remove the buffer API from PyUnicode 3 days http://bugs.python.org/issue1260 gvanrossum patch PEP 3137: make bytesobject.c methods 5 days http://bugs.python.org/issue1261 gregory.p.smith py3k, patch __file__ and co_filename as unicode 2 days http://bugs.python.org/issue1264 gvanrossum patch array unittest problems with UCS4 build 3 days http://bugs.python.org/issue1268 gvanrossum patch Decode __file__ and co_filename to unicode using fs default 3 days http://bugs.python.org/issue1272 tiran patch typo in documentation - lib ref section 14.3.3.4 3 days http://bugs.python.org/issue1281 georg.brandl dict.fromkeys - Odd logic when passing second dict.fromkeys as v 0 days http://bugs.python.org/issue1288 rhettinger Typo in Context Manager Types 0 days http://bugs.python.org/issue1289 facundobatista xml.dom.minidom not able to handle utf-8 data 2 days http://bugs.python.org/issue1290 draghuram logging records cache the result of formatException() 0 days http://bugs.python.org/issue1295 theller patch Use correct encoding for printing SyntaxErrors 1120 days http://bugs.python.org/issue1031213 gvanrossum patch Irregular behavior of datetime.__str__() 1051 days http://bugs.python.org/issue1074462 zooko Add SSL certificate validation 985 days http://bugs.python.org/issue1114345 janssen patch httplib hangs reading too much data 363 days http://bugs.python.org/issue1580738 facundobatista patch Fix Bug 1362475 Text.edit_modified() doesn't work 264 days http://bugs.python.org/issue1643641 georg.brandl patch Top Issues Most Discussed (10) ______________________________ 30 Decode __file__ and co_filename to unicode using fs default 3 days closed http://bugs.python.org/issue1272 10 Removal of basestring type 6 days closed http://bugs.python.org/issue1258 9 Py3K cannot run as ``python -S`` 8 days open http://bugs.python.org/issue1267 8 PEP 3137: make bytesobject.c methods 5 days closed http://bugs.python.org/issue1261 7 imp.find_module() ignores -*- coding: Latin-1 -*- 5 days open http://bugs.python.org/issue1278 6 xml.dom.minidom not able to handle utf-8 data 2 days closed http://bugs.python.org/issue1290 5 array unittest problems with UCS4 build 3 days closed http://bugs.python.org/issue1268 5 Irregular behavior of datetime.__str__() 1051 days closed http://bugs.python.org/issue1074462 4 implement warnings module in C 283 days open http://bugs.python.org/issue1631171 4 Support for z/OS and EBCDIC. 1 days open http://bugs.python.org/issue1298

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C Decimal - is there any interest?
by Mateusz Rukowicz Oct. 19, 2007

Oct. 19, 2007

Hi! I've been working on C decimal project during gSoC 2006. After year of idling (I had extremely busy first year on University, but well, most of us are extremely busy) I decided, that I will handle further developing (there is still much development needed, and updating to most recent standard is just the beginning). I understand, that chances of merging C Decimal with main tree are much lower than year ago, so I would like to know if there is still interest in C version of Decimal. If so - should I write PEP, or just code and 'we'll see later'? I've made a little benchmark - given loan amount, assets and months that it's meant to be payed off, find minimal monthly loan cost (It's just first idea that came to me for use Decimal in financial 'application' :>) [This solution has complexity O(log(amount) * months) which is far from optimal, but it's meant to benchmark Decimal, not python itself]. Code: from _decimal import * import sys gc = getcontext(); def check(loan, percent, monthly): ret = 0 mult = 1 + (percent / 1200) if (loan - monthly) * mult >= loan: return -1 #you cannot payoff loan ;( while loan > 0: loan = loan - monthly loan = loan * mult ret += 1 return ret def minimize_monthly(loan, percent, months): lower = Decimal(0) upper = Decimal(loan) while(upper > lower + Decimal("1e-3")): mid = (upper + lower)/2 ret = check(loan, percent, mid) if(ret > months or ret == -1): lower = mid else: upper = mid return lower gc.prec = int(sys.argv[4]) gc.rounding = ROUND_UP print minimize_monthly(Decimal(sys.argv[1]), Decimal(sys.argv[2]), int(sys.argv[3])) and timings (1mln loan, for 15 years, 2% year assets, and precision = 10 :>): mateusz@MatLaps:~/programy/python/decimal/decimal-c$ time ../../pyth/python/python loan.py 1000000 2 180 10 6424.37955 real 0m0.068s user 0m0.064s sys 0m0.004s mateusz@MatLaps:~/programy/python/decimal/decimal-c$ time ../../pyth/python/python loan2.py 1000000 2 180 10 6424.37955 real 0m2.168s user 0m2.148s sys 0m0.016s Please don't misunderstand me - I don't want to show python Decimal is slow, I want to show that C Decimal is worth effort. I am also aware of simplicity of this benchmark. (This python have been of course compiled with -O3). Best regards, Mateusz Rukowicz.

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Re: [Python-Dev] SSL 1.7
by Paul Moore Oct. 18, 2007

Oct. 18, 2007

On 18/10/2007, Bill Janssen <janssen(a)parc.com> wrote: > > > you can > > > import the socket module and just get socket.error directly off of the > > > module itself. > > > > This is feasible. > > In fact, so feasible I've done it. :-). > > http://pypi.python.org/pypi/ssl/1.9/ On a mostly unrelated note, I just checked a Python 2.4 build on Windows. The asyncore error I was seeing previously hasn't gone away, but it has changed. Rather than an exception (followed by the test hanging) I now get the test hanging in what seems to be the same place, but no exception :-( I'm not sure if that's an improvement... Python 2.3 and 2.5 still pass all tests fine. Paul.

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Re: [Python-Dev] SSL 1.7
by Brett Cannon Oct. 18, 2007

Oct. 18, 2007

On 10/18/07, Bill Janssen <janssen(a)parc.com> wrote: > > > One thing to watch out for: ssl.SSLError can't > > > inherit from socket.error, as it does in 2.6+, > > > > Why not? > > Mainly because I don't see how to get my hands on the C version of > socket.error. Patches gratefully accepted, though. For anyone who wants to write the patch, you can obviously either expose the variable the exception is stored in globally, or you can import the socket module and just get socket.error directly off of the module itself. -Brett

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SSL 1.7
by Jim Jewett Oct. 18, 2007

Oct. 18, 2007

Bill Janssen wrote: > One thing to watch out for: ssl.SSLError can't > inherit from socket.error, as it does in 2.6+, Why not? -jJ

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SSL 1.7
by Jim Jewett Oct. 17, 2007

Oct. 17, 2007

Bill Janssen wrote: > One thing to watch out for: ssl.SSLError can't > inherit from socket.error, as it does in 2.6+, Why not? -jJ

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Python help desired
by Collis, Chris Oct. 17, 2007

Oct. 17, 2007

Guido van Rossum suggested I forward this email to you. I contacted him earlier this week regarding the inquiry below. Please read. > Our company produces hardware for both wired and wireless > device networking. We recently launched a wireless gateway that supports > Python for programmability. Our customers use this gateway as part of an > end-to-end wireless sensor network and Python to add application-specific > data intelligence. We are looking to assemble a group of third party Python > developers or Python shops that we can refer customers to who need support > in developing scripts to support their intended application. > > Do you have any organizations/individuals you might recommend who could > partner with us in such a capacity or another resource I might pursue to > find such partners? We are a global company and ideally would like partners > who can support global opportunities or partners in North America, Europe > and Asia who specialize in those regions. > > Feel free to contact me directly if you would like further information or > clarification. > > Thanks much, > Chris Collis > Digi Int'l > Product Marketing > 952 912 3150

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Re: [Python-Dev] Python Extension Building Network
by Joseph Armbruster Oct. 16, 2007

Oct. 16, 2007

Mike, I had been working on getting my box ready to function as one of these: http://wiki.python.org/moin/BuildbotOnWindows. However, I will help out in whatever way possible. If the team feels it could be better utilized doing this, let's do it. VS2005 only fits in because I happen to own a single license :-) It seems like most people in the community do not have ready-access to one, so I figured this could be a benefit. Let me know, Mr. Joseph Armbruster Mike wrote: > Dear Ms. Armbruster, > > Steve Holden thought I should contact you. We are working on > developing a network of volunteers to build binary Python extensions > for Windows. In a thread on c.l.py, Lundh told us that we should > compile against 2.3 on up. > > I have been experimenting with compiling some extensions with open > source tools only, namely the MingW compiler. I also have Visual > Studio 2003 to use for comparison. I guess what I'm asking is if you'd > like to be a part of the network. Right now, it's just me with > Holden's backing. > > How does Visual Studio 2005 fit in exactly? From my research, Python > 2.4/2.5 were compiled with VS2003. Is VS2005 being used for 2.6+? > > Anyway, let me know what you think. You can see some of my stuff here: > > http://www.pythonlibrary.org/python_modules.htm > > Mike Driscoll >

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Re: [Python-Dev] C Decimal - is there any interest?
by Mateusz Rukowicz Oct. 16, 2007

Oct. 16, 2007

Grzegorz Makarewicz wrote: > >Python in high aritmetic - nice, but in standard ? - using computation >effective representation as in this "demand" should be put as *must* >have ? in standard python ? - decimal with it's speed is sufficient - if >U need more speed use more spohisticated data structures - numpy/scipy >... - I dont like those additions to python standard. > > > > First of all C Decimal isn't meant to be substitute to numpy in any way. Second of all, I don't think numpy/scipy is an alternative to Decimal - it is more complicated, and I am not even sure if it supports Decimal arithmetic (which is crucial for financial application ie.). [I couldn't find on google whether scipy supports decimal arithmetic, so I assumed it doesn't because of name '*scientific* tools for python'. However, if it supports - ignore following text block] I bet most computation using Decimal are made with precision < 20, in that case, you might say 'if you need more performance, use built in double' - it's performance is superior to Decimal, and precision is the same, but that's not what all is about. So if one needs Decimal arithmetic (mostly financial applications), and Py Decimal is not enough - then pretty big problem arises. And that's why C Decimal is for IMHO :). >if U need more speed use more spohisticated data structures - numpy/scipy Why use more sophisticated data structure if less sophisticated, but written in C is enough? One more thing - C Decimal is being written such way, that moving from Py Decimal to C Decimal needs very little to no effort. You cannot say it about moving from Decimal to some other, more sophisticated libraries. Anyway - thanks for opinion ;>

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PyCon 2008: Call for Talk & Tutorial Proposals
by David Goodger Oct. 16, 2007

Oct. 16, 2007

Proposals for PyCon 2008 talks & tutorials are now being accepted. The deadline for proposals is November 16. PyCon 2008 will be held in Chicago, Illinois, USA, from March 13-20. Please see the full announcement here: http://pycon.blogspot.com/2007/10/call-for-talk-tutorial-proposals.html -- David Goodger <http://python.net/~goodger>

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