Python-Dev October 2004

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105 participants
99 discussions

Re: [ python-Bugs-1048808 ] test_subprocess 2.4b1 fails on FreeBSD 5.2
by Peter Astrand 23 Oct '04

23 Oct '04

Comments? Is it safe or not to assume that by the time the Python has started, only fds 0,1,2 are open? /Peter > I think this is the core of the problem. The test_close_fds > test works like this: > > All file descriptors in the forked child (except 0,1,2) are > closed. Then the Python binary is executed via execvp(). A > small test program is passed to the Python binary via the -c > command line option. If the OS and subprocess module works > correctly, we can be sure of that by the time of the > execve() system call, only file descriptors (0,1,2) are open > (well, the errpipe as well, but let's leave that out for > now). But, by the time the Python binary starts executing > the small program, all sorts of things may have happened. > I'm not really sure we can trust Python not to open files > during startup. For example, if we have a PYTHONSTARTUP > file, that open file will have a file descriptor, perhaps 3. > > On one hand, this bug could indicate a bug in the Python > interpreter itself: perhaps a file descriptor leak. On the > other hand, this test might be a bit too unsafe. > > So probably, this test should be removed.

4 4

Adding a developer
by A.M. Kuchling 23 Oct '04

23 Oct '04

Could someone please add Lars Gustaebel (SF ID "gustaebel") as a developer? He's responsible for writing and maintaining tarfile.py, but his bugfixes usually sit around in the tracker until someone gets around to looking at them, which is inefficient. Thanks! --amk

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ConfigParser shootout, preliminary entry
by Michael Chermside 21 Oct '04

21 Oct '04

A few weeks ago, the suggestion was made on Python-Dev that it might be time to consider replacing the ConfigParser module and that we should hold a "shootout" (ie ask for implementations and see what we get). Since then I've been playing around with this... not the parsing part (which so far I have completely ignored) but the programmer interface. There needs to be a well-thought-out data model for the information stored, and the user interface needs to be very easy to use, yet not so "magical" that it becomes difficult to understand. I have put together what I think is probably my best proposal. It is based on a superset of ini config files and java .property files. There is a convenient access mechanism ("config.my_app.some_value") as well as more general approaches ("config.values['my_app.serviceByPort.80']"). I have tried to consider issues like unicode (I permit fairly lenient mixing of unicode and str), and unit testing ("... call config.clear_all() in the tearDown() method of any unittests that use the config module..."). I have even considered carefully what to leave OUT (converting to non-string data types, interpolating values, things like that). I think that I am now at the point where I could really use some input from others. So I'd like to invite people to review my design and send me your suggestions. I'm not expecting this as a *useful* module yet (it doesn't yet parse files!), but it seemed like a good stage at which to ask for feedback. I'm attaching two files, config.py and configTest.py, and they are also available from these urls: http://www.mcherm.com/publish/2004-10-17/config.py http://www.mcherm.com/publish/2004-10-17/configTest.py Thanks in advance for reviewing this. -- Michael Chermside

10 22

audiotest.au and possible copyright issues?
by Mihai Ibanescu 21 Oct '04

21 Oct '04

Hello, Here's an interesting bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=136654 Is anyone aware of copyright issues on the Monty Python audio file? Thanks, Misa

8 8

Patches
by Oleg Broytmann 21 Oct '04

21 Oct '04

Hello! I submitted a number of patches to the SF tracker. Few of them were accepted, but most of them still are unreviewd by core team. What can I do to help? (A polite way to say "how can I push them?" :) I have updated them to Python 2.4b1. Actually, only one of them required minor changes (different line numbers). But I must admit that the patches are not a simple bug fix, so it is probably too late to apply them for 2.4. They can wait for 2.5... but I am afraid they will be just forgotten. The patches are: http://python.org/sf/754022 This is the biggest and the oldest. It hangs in the tracker since Python 2.2. In short, it makes the webbrowser.py runs through _tryorder list of browsers and trie to run every browser until one started successfully. Currently webbrowser.py tries to run a browser and if it fails - stops trying. Assigned to Fred Drake. http://python.org/sf/784089 A program to scan python files and list those require -*- coding -*- directive. Reviewed by Marc-Andre Lemburg and Andrew Kuchling. http://python.org/sf/821862 Makes ftplib.py a bit more RFC959-compliant. The RFC requires the FTP protocol to be run not over TCP but over telnet. For most people there is no difference but there is a subtle different for those who use non-ASCII encodings: chr(255) - a special character in telnet - requires a special handling. My patch adds a toggle that allows to turn telnet on (actually, it only doubles chr(255) in command stream, but it is one of two things that are required for FTP-over-telnet). By default it is off to preserve backward compatibility. http://python.org/sf/1038388 The smallest and the simplest of all. 3 lines patch that adds __main__ to whichdb.py, so one can run it on the command line: $ whichdb.py *.db Oleg. -- Oleg Broytmann http://phd.pp.ru/ phd(a)phd.pp.ru Programmers don't die, they just GOSUB without RETURN.

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What are the goals for ConfigParser 3000?
by David Wilson 20 Oct '04

20 Oct '04

On Sun, Oct 17, 2004 at 03:38:11PM -0700, Michael Chermside wrote: > My apologies, my previous email was intended to go to python-list, not > python-dev. I didn't intend to bother this list with it until it was > at a point where I thought it was a contender for inclusion. Sometimes > I really wish there was an "Unsend" option for email. I think it raised a point though - there were a few wildly different ideas about what ConfigParser's replacement should be. Would it be wise to discuss first what ConfigParser is *supposed* to be, and where it fits in peoples' applications? If this hits a chord with you, pump your reply button and discuss! If you look at the current ConfigParser, you might find the following: - It is a simple storage method for text data that categorises sets of keys with sets of values. - Its backend format is simple and fast for other tools to parse (even for on-request applications, like web scripts). - For almost any complex data, it becomes immediately less useful, but with a small amount of external wrapping, can also be used for more complex configuration structures. - It is *not* a means for declaring objects or doing sums: that is what the Python syntax itself is for. My problems with the current ConfigParser are as follows: - The interface is unfriendly and error-prone. Examples: - read(): raises no exception if a file is missing. This is against Python culture, and the unsurprising name causes IMHO surprising behaviour, especially for the standard library. - readfp(): 'more than one way to do it'. File-like objects are such a fundamental part of Python that I think read() should go away entirely. This would mean that a programmer is explicitly reminded of the errors that can occur when opening his configuration file as he explicitly types the file() factory expression himself. - Again, for getting values there are a few methods which essentially repeat themselves - getint(), getfloat(), etc. What is wrong with int(obj.get(...))? - get() shares the same method name as the infinitely popular dict.get() method, yet does not support a <default> argument. - String interpolation! There is a friendly string syntax as a standard library feature these days, and less friendly interpolation has always existed in the language itself. This should go, and be made more explicit for the programmer. In my opinion we should differenciate at an early stage between complex processing tasks (Python itself) and storing random snippets of configuration data. In short, removing the functions that really shouldn't be there and modernizing the code, would be a good starting place for a replacement. Only then we can start talking about ConfigParser-NG. Thanks, David. -- Now that my house has burned down I have a much better view of the moon.

3 2

Python 2.4b1 on win32 installer bug?
by Alex A. Naanou 20 Oct '04

20 Oct '04

here it is.. actually quite simple, the option not to register extensions simply unregisters them.... thanks. -- Alex.

3 6

Paid Research Project on Stackless 3.1
by Christian Tismer 20 Oct '04

20 Oct '04

Dear community, I would love to publish Stackless 3.1, of course. Also I know that there is some inherent bug in it. I'm seeking a person who would take the job to find the buglet. He would need to debug and nail down a commercial application, which I cannot make public. (S)He would need to sign an NDA with me. The success payment would be $500. If the problem shows up to be very hard (to some undefined definition of very hard, to be negotiated), it can be increased to $1000. If my app works afterwards, Stackless 3.1 is just fine. If it doesn't work, no payment happens. The identified problem needs to be documented by a reprodicuble test case. If somebody is interested, please contact me privately. And be aware, this is really no easy stuff. You need to be a real hardcore system hacker with many years of experience. Here is the CVS path to the dev trunk: CVSROOT=:pserver:anonymous@stackless.com:/home/cvs cvs co slpdev/src/2.3/dev The cheapest complete solution wins. Hurry up :-) Sincerely -- chris -- Christian Tismer :^) <mailto:tismer@stackless.com> tismerysoft GmbH : Have a break! Take a ride on Python's Carmerstr. 2 : *Starship* http://starship.python.net/ 10623 Berlin : PGP key -> http://wwwkeys.pgp.net/ work +49 30 31 86 04 18 home +49 30 802 86 56 mobile +49 173 24 18 776 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/

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Re: subprocess - updated popen5 module
by Peter Astrand 20 Oct '04

20 Oct '04

[From Mail to python-announce list] > I'd like to give you an updated status report of the popen5 project. Since > my last post at 2004-06-04, this has happened: ... > With these changes, the subprocess module now feels quite complete. In the > near future, I will focus on getting the module included in the standard > library. I've recieved very positive feedback on my module. Many users are also asking me if this module will be included in the standard library. That is, of course, my wish as well. So, can the subprocess module be accepted? If not, what needs to be done? /Peter Åstrand <astrand(a)lysator.liu.se>

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Weekly Python Patch/Bug Summary
by Kurt B. Kaiser 19 Oct '04

19 Oct '04

Patch / Bug Summary ___________________ Patches : 240 open ( +0) / 2661 closed ( +6) / 2901 total ( +6) Bugs : 772 open ( +6) / 4528 closed (+14) / 5300 total (+20) RFE : 155 open ( +0) / 131 closed ( +0) / 286 total ( +0) New / Reopened Patches ______________________ typo in liblocale.tex (2004-10-15) CLOSED http://python.org/sf/1047577 opened by George Yoshida fileinput.py fixed clobbering behavior and added encodings (2004-10-15) http://python.org/sf/1048075 opened by Chris Connett subprocess documentation (2004-10-16) CLOSED http://python.org/sf/1048341 opened by Fredrik Lundh Bug fixes and cleanup for decimal.py (2004-10-17) http://python.org/sf/1048728 opened by Neal Norwitz adding bool support to xdrlib.py (2004-10-18) http://python.org/sf/1049151 opened by Lars Gustäbel PyOS_InputHook inconsistency on Windows (2004-10-19) http://python.org/sf/1049855 opened by Michiel de Hoon Patches Closed ______________ Bad test for HAVE_UINTPTR_T in PC/pyconfig.h (2004-09-01) http://python.org/sf/1020042 closed by loewis typo in liblocale.tex (2004-10-15) http://python.org/sf/1047577 closed by nnorwitz Buffer overwrite in PyUnicode_AsWideChar (2004-10-14) http://python.org/sf/1047269 closed by lemburg subprocess documentation (2004-10-16) http://python.org/sf/1048341 closed by effbot Implementation for PEP 318 (Guido's version) (2004-03-31) http://python.org/sf/926860 closed by nnorwitz rfc822.parsedate returns a tuple (2003-04-01) http://python.org/sf/713599 closed by nnorwitz New / Reopened Bugs ___________________ Turtle.py hangs Idle (2004-10-15) http://python.org/sf/1047540 opened by Taro Ogawa Turtle.py hangs Idle (2004-10-15) CLOSED http://python.org/sf/1047549 opened by Taro Ogawa stat documentation is incorrect (2004-10-16) CLOSED http://python.org/sf/1048234 opened by libber ator Memory leaks? (2004-10-17) http://python.org/sf/1048495 opened by Roman Mamedov SystemError with deque (2004-10-17) CLOSED http://python.org/sf/1048498 opened by George Yoshida Add pythonX.dll to KnownDlls (2004-10-17) CLOSED http://python.org/sf/1048681 opened by Miki Tebeka Doc typo (2004-10-17) CLOSED http://python.org/sf/1048756 opened by Scott David Daniels test_subprocess 2.4b1 fails on FreeBSD 5.2 (2004-10-17) http://python.org/sf/1048808 opened by Shalabh Chaturvedi C-k does not work for curses.textpad.Textbox (2004-10-17) CLOSED http://python.org/sf/1048816 opened by Stefan Heimann Only "Overwrite" mode possible with curses.textpad.Textbox (2004-10-17) http://python.org/sf/1048820 opened by Stefan Heimann unexpected floating point exponent behaviour (2004-10-17) CLOSED http://python.org/sf/1048864 opened by Ruwen Hahn codecs.StreamReader.readlines() broken (2004-10-17) CLOSED http://python.org/sf/1048865 opened by Thomas Waldmann call arg of lambda not updating (2004-10-17) http://python.org/sf/1048870 reopened by kquick call arg of lambda not updating (2004-10-17) http://python.org/sf/1048870 opened by Kevin Quick shutil.copytree copies stat of files, but not of dirs (2004-10-18) http://python.org/sf/1048878 opened by Thomas Waldmann Registry not updated by 2.4b1 installer (2004-10-17) CLOSED http://python.org/sf/1048900 opened by B Sizer strptime doesn't work with %U (2004-10-12) http://python.org/sf/1045381 reopened by bcannon os.rmtree error handling was always broken (2004-10-17) http://python.org/sf/1048941 opened by Guido van Rossum Install-time module compilation fails with 2.4b1 (2004-10-18) http://python.org/sf/1049003 opened by Tony Meyer Solaris: EINTR exception in select/socket calls in telnetlib (2004-10-18) http://python.org/sf/1049450 opened by Mike Brauwerman smeared title when installing (2004-10-18) http://python.org/sf/1049615 opened by Jim Jewett test_socket PORT conflict with boa-constructor (2004-10-19) http://python.org/sf/1049816 opened by Simon Dahlbacka zlib module documentation wrong version (2004-10-19) CLOSED http://python.org/sf/1049826 opened by Wolfgang Langner rfc822.parseaddr is broken, breaks sendmail call in smtplib (2004-10-19) http://python.org/sf/1050268 opened by Scott Dossey Bugs Closed ___________ Turtle.py hangs Idle (2004-10-15) http://python.org/sf/1047549 closed by tso Error in the given example (2004-10-14) http://python.org/sf/1046800 closed by facundobatista stat documentation is incorrect (2004-10-16) http://python.org/sf/1048234 closed by jlgijsbers Docs for os, popen2 omit list argument to popen2() et al (2004-03-01) http://python.org/sf/907457 closed by jlgijsbers Unable to install Docs - Linux (2004-10-11) http://python.org/sf/1044872 closed by jlgijsbers distutils.util.get_platform() should include sys.version[:3] (2004-09-27) http://python.org/sf/1035703 closed by etrepum SystemError with deque (2004-10-16) http://python.org/sf/1048498 closed by rhettinger textReader: reading after close is a seg fault (2004-09-30) http://python.org/sf/1038013 closed by nnorwitz Add pythonX.dll to KnownDlls (2004-10-17) http://python.org/sf/1048681 closed by loewis Doc typo (2004-10-17) http://python.org/sf/1048756 closed by nnorwitz C-k does not work for curses.textpad.Textbox (2004-10-17) http://python.org/sf/1048816 closed by akuchling unexpected floating point exponent behaviour (2004-10-17) http://python.org/sf/1048864 closed by tim_one codecs.StreamReader.readlines() broken (2004-10-18) http://python.org/sf/1048865 closed by perky call arg of lambda not updating (2004-10-17) http://python.org/sf/1048870 closed by rhettinger Registry not updated by 2.4b1 installer (2004-10-18) http://python.org/sf/1048900 closed by loewis strptime doesn't work with %U (2004-10-12) http://python.org/sf/1045381 closed by bcannon zlib module documentation wrong version (2004-10-19) http://python.org/sf/1049826 closed by akuchling warning '"_POSIX_C_SOURCE" redefined' when include Python.h (2004-10-13) http://python.org/sf/1045893 closed by loewis

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Python-Dev October 2004