Mailman 3 October 2007 - Python-Dev

Re: [Python-Dev] Python developers are in demand
by Wolfgang Langner 16 Oct '07

16 Oct '07

On 10/16/07, Wolfgang Langner <tds333+pydev(a)gmail.com> wrote: > On 10/15/07, skip(a)pobox.com <skip(a)pobox.com> wrote: > > > > >> I wonder if we should start maintaining a list of Python developers > > >> for hire somewhere on python.org, beyond the existing Jobs page. Is > > >> anyone interested in organizing this? > > > > Andrew> What about something a little less formal - a mailing list such > > Andrew> as python-jobs? > > > > How about just creating a page on the wiki and letting those people > > participate who are interested? > That's a good idea. Post the page and I add my name.

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Re: [Python-Dev] SSL 1.8
by Gregory P. Smith 16 Oct '07

16 Oct '07

+1 from me. sounds like a good idea. On 10/15/07, Bill Janssen <janssen(a)parc.com> wrote: > > I've added in some code that Chris Stawarz contributed to allow the > use of non-blocking sockets, with the program thread allowed to do > other things during the handshake while waiting for the peer to > respond. > > http://pypi.python.org/pypi/ssl > > If this is OK with everyone, I'd like to now port this back to 2.6 > aand 3K. > > Bill > _______________________________________________ > 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/greg%40krypto.org >

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SSL 1.8
by Bill Janssen 15 Oct '07

15 Oct '07

I've added in some code that Chris Stawarz contributed to allow the use of non-blocking sockets, with the program thread allowed to do other things during the handshake while waiting for the peer to respond. http://pypi.python.org/pypi/ssl If this is OK with everyone, I'd like to now port this back to 2.6 aand 3K. Bill

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Anyone using ctags with Vim?
by Brett Cannon 15 Oct '07

15 Oct '07

I just noticed that the 'tags' Makefile target does not work with ctags 5.7 since the -t option no longer exists. So question 1 is whether anyone is using the 'tags' target. If the answer is no, then if you have your own way of generating the tags, let me know and I will update the target. Otherwise I might just rip it out. -Brett

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XP Buildbot
by Joseph Armbruster 15 Oct '07

15 Oct '07

Greetings, Long, long ago, I had mentioned dedicating a laptop of mine to the python project as a buildbot. Well, I finally made it around to cleaning off my box and putting it all together. I prepared my laptop with everything (I think...) needed to become a buildbot. The system specifications are as follows: OS Name: Microsoft Windows XP Professional OS Version: 5.1.2600 Service Pack 2 Build 2600 Processor: x86 Family 15 Model 2 Stepping 4 GenuineIntel ~1195Mhz Total Physical Memory: 1,023MB I have the trunk built with VS2005 and I am doing a clean run of rt.bat right now to verify everything is reasonably good. I would like to seek insight from the team as to what steps I could take next to verify my box is ready to go and make it be used. Thank You, Joseph Armbruster

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C Decimal - is there any interest?
by Mateusz Rukowicz 15 Oct '07

15 Oct '07

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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UTF8 in the PEP branch
by Facundo Batista 15 Oct '07

15 Oct '07

There were two tracker issues that I want to solve that implies to touch some PEP text. So, I checked out the PEP branch... svn.python.org/peps/trunk ...and made a "make". A lot of files started to fail because of not ASCII characters (the standard Syntax Error of PEP-0263, I'm using Py2.5), like... # Author: David Goodger # Contact: goodger(a)users.sourceforge.net # Revision: $Revision: 4152 $ # Date: $Date: 2005-12-07 20:46:30 -0300 (mié, 07 dic 2005) $ # Copyright: This module has been placed in the public domain. ...(see the date) in the "./docutils/utils.py" program. A *lot* of files failed this way. I started to fix them (-*- coding -*- line at the start), but then I thought that maybe *I* was doing something wrong, because it's strange that nobody noticed this before... So, shall I continue fixing these? Or what I'm doing wrong here? Thank you very much! -- . Facundo Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/

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SVN down?
by Christian Heimes 14 Oct '07

14 Oct '07

I'm having trouble to connect to the anonymous svn server at http://svn.python.org/ $ LC_ALL=C svn up svn: PROPFIND request failed on '/projects/python/branches/py3k' svn: PROPFIND of '/projects/python/branches/py3k': could not connect to server (http://svn.python.org) $ nmap -v -p80 svn.python.org Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-08 13:37 CEST Initiating Parallel DNS resolution of 1 host. at 13:37 Completed Parallel DNS resolution of 1 host. at 13:37, 0.00s elapsed Initiating Connect() Scan at 13:37 Scanning svn.python.org (82.94.237.220) [1 port] Completed Connect() Scan at 13:37, 0.06s elapsed (1 total ports) Host svn.python.org (82.94.237.220) appears to be up ... good. Interesting ports on svn.python.org (82.94.237.220): PORT STATE SERVICE 80/tcp closed http Nmap finished: 1 IP address (1 host up) scanned in 0.401 seconds The apache server seems to be down. Christian

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Re: [Python-Dev] Explicit Tail Calls
by Greg Ewing 13 Oct '07

13 Oct '07

Shane Hathaway wrote: > I was aware of Guido's earlier rejections, but I figured the rejection > was due to the risky implicit optimization proposed by others. Perhaps > the objection is deeper than that; I suspect Guido specifically objects > to excessive use of recursion. As I recall, one of the objections is that it makes debugging difficult by removing intermediate stack frames from the traceback. However, I don't think that the sort of programming style that requires tail call optimisation is really part of the Python programming culture. It's used in languages like Lisp and Haskell because the data structures used to represent lists in those languages are themselves recursive. However, Python doesn't do things that way -- normally it represents a list as a flat data structure, which is more naturally iterated over than recursed over. In my experience, the only time recursion is really called for in Python is when you're operating on tree-shaped data structures, in which case tail calls don't really come into it. When operating on something linear, I find that a for-loop or list comprehension usually gets the job done more clearly and concisely. -- Greg

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MacOSX -framework options and distutils weirdness
by Greg Ewing 12 Oct '07

12 Oct '07

A while back I wrote about a problem I was having with the ordering of -framework options in distutils compilation commands. Well, now I've discovered something even stranger. When distutils executes the following link command, I get a bunch of undefined OpenGL-related symbols. But if I copy and paste *exactly the same command* into the shell, it succeeds! What could possibly be going on here? gcc -Wl,-F. -bundle -framework Python build/temp.darwin-8.4.0-Power_Macintosh-2.3/_soya.o build/temp.darwin-8.4.0-Power_Macintosh-2.3/matrix.o build/temp.darwin-8.4.0-Power_Macintosh-2.3/chunk.o -L/usr/lib -L/usr/local/lib -L/usr/X11R6/lib -lm -lGLEW -lfreetype -lcal3d -lstdc++ -lode -o build/lib.darwin-8.4.0-Power_Macintosh-2.3/soya/_soya.so -framework OpenGL -framework SDL -framework OpenAL This is on MacOSX 10.4 with Python 2.3. -- Greg

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