Mailman 3 August 2005 - Python-Dev

Terminology for PEP 343
by Raymond Hettinger 12 Aug '05

12 Aug '05

With 343 accepted, we can now add __enter__() and __exit__() methods to objects. What term should describe those objects in the documentation? For instance, if the new magic methods are added to decimal.Context(), do we then describe Context objects as "withable" ;-) The PEP itself doesn't provide much of a clue. The terms "template", "wrapper", and "block" are over-broad and do not provide a metaphor for setup/teardown, r entry/exit, or initialization/finalization. Whatever term is selected, it should be well thought-out and added to the glossary. The choice of words will likely have a great effect on learnability and on how people think about the new tool. Raymond

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Re: [Python-Dev] Exception Reorg PEP revised yet again
by James Y Knight 11 Aug '05

11 Aug '05

On Aug 11, 2005, at 2:41 PM, Josiah Carlson wrote: > Remember, the Exception reorganization is for Python 3.0/3k/whatever, > not for 2.5 . Huh, I could *swear* we were talking about fixing things for 2.5...but I see at least the current version of the PEP says it's talking about 3.0. If that's true, this is hardly worth discussing as 3.0 is never going to happen anyways. And here I was hoping this was an actual proposal. Ah well, then. James

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Re: [Python-Dev] [Python-checkins] python/dist/src/Objects setobject.c, 1.45, 1.46
by Jim Jewett 11 Aug '05

11 Aug '05

(1) Is there a reason that you never shrink sets for discard/remove/pop? (set difference will do a one-time shrink, if there are enough dummy entries, but even then, it doesn't look at the %filled, so a merge-related overallocation will stick around) I note the you do the same with dicts, but I think sets are a more natural candidate for "this is the set of things I still have to process, in any order". (I suppose enforcing an order with deque may be faster -- unless I'm worried about duplicates.) (2) When adding an element, you check that if (!(so->used > n_used && so->fill*3 >= (so->mask+1)*2)) Is there any reason to use that +1? Without it, resizes will happen element sooner, but probably not much more often -- and you could avoid an add on every insert. (I suppose dictionaries have the same question.) (3) In set_merge, when finding the new size, you use (so->fill + other->used) Why so->fill? If it is different from so->used, then the extras are dummy entries that it would be good to replace. (I note that dictobject does use ->used.) -jJ

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Exception Reorg PEP revised yet again
by Brett Cannon 11 Aug '05

11 Aug '05

version 1.7 scales the proposal back once more (http://www.python.org/peps/pep-0348.html). At this point the only changes to the hierarchy are the addition of BaseException and TerminatingException, and the change of inheritnace for KeyboardInterrupt, SystemExit, and NotImplementedError. At this point I don't think MAL or Raymond will have any major complaints. =) Assuming no one throws a fit over this version, discussing transition is the next step. I think the transition plan is fine, but if anyone has any specific input that would be great. I could probably stand to do a more specific timeline in terms of 2.x, 2.x+1, 3.0-1, etc., but that will have to wait for another day this week. And once that is settled I guess it is either time for pronouncement or it just sits there until Python 3.0 actually starts to come upon us. -Brett

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Re: [Python-Dev] Exception Reorg PEP revised yet again
by Raymond Hettinger 11 Aug '05

11 Aug '05

> There > is a reason you listed writing a PEP on your own on the "School of > Hard Knocks" list; it isn't easy. I am trying my best here. Hang in there. Do what you can to make sure we get a result we can live with. -- R

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Weekly Python Patch/Bug Summary
by Kurt B. Kaiser 11 Aug '05

11 Aug '05

Patch / Bug Summary ___________________ Patches : 352 open ( -2) / 2896 closed ( +8) / 3248 total ( +6) Bugs : 913 open ( +4) / 5162 closed (+10) / 6075 total (+14) RFE : 191 open ( +0) / 178 closed ( +0) / 369 total ( +0) New / Reopened Patches ______________________ compiler package: "global a; a=5" (2005-08-04) http://python.org/sf/1251748 opened by Armin Rigo Simplying Tkinter's event loop (2005-08-05) http://python.org/sf/1252236 opened by Michiel de Hoon modulefinder misses modules (2005-08-05) http://python.org/sf/1252550 opened by Thomas Heller poplib list() docstring fix (2005-08-05) CLOSED http://python.org/sf/1252706 opened by Steve Greenland QuickTime API needs corrected object types (2005-08-09) http://python.org/sf/1254695 opened by Christopher K Davis GCC detection for runtime_library_dirs when ccache is used (2005-08-09) http://python.org/sf/1254718 opened by Seo Sanghyeon Patches Closed ______________ Faster commonprefix in macpath, ntpath, etc. (2005-01-20) http://python.org/sf/1105730 closed by birkenfeld poplib list() docstring fix (2005-08-05) http://python.org/sf/1252706 closed by birkenfeld absolute paths cause problems for MSVC (2003-10-21) http://python.org/sf/827386 closed by loewis Fix LINKCC (Bug #1189330) (2005-07-15) http://python.org/sf/1239112 closed by loewis file.encoding support for file.write and file.writelines (2005-06-04) http://python.org/sf/1214889 closed by birkenfeld st_gen and st_birthtime support for FreeBSD (2005-04-11) http://python.org/sf/1180695 closed by loewis Add unicode for sys.argv, os.environ, os.system (2005-07-02) http://python.org/sf/1231336 closed by loewis Refactoring Python/import.c (2004-12-30) http://python.org/sf/1093253 closed by theller New / Reopened Bugs ___________________ cgitb gives wrong lineno inside try:..finally: (2005-08-03) http://python.org/sf/1251026 opened by Rob W.W. Hooft Decoding with unicode_internal segfaults on UCS-4 builds (2005-08-03) http://python.org/sf/1251300 opened by nhaldimann smtplib and email.py (2005-08-03) http://python.org/sf/1251528 opened by Cosmin Nicolaescu Python 2.4.1 crashes when importing the attached script (2005-08-04) http://python.org/sf/1251631 opened by Viktor Ferenczi Fail codecs.lookup() on 'mbcs' and 'tactis' (2005-08-04) http://python.org/sf/1251921 reopened by lemburg Fail codecs.lookup() on 'mbcs' and 'tactis' (2005-08-04) http://python.org/sf/1251921 opened by liturgist Issue with telnetlib read_until not timing out (2005-08-04) http://python.org/sf/1252001 opened by padded IOError after normal write (2005-08-04) http://python.org/sf/1252149 opened by Patrick Gerken os.system on win32 can't handle pathnames with spaces (2005-08-05) CLOSED http://python.org/sf/1252733 opened by Ori Avtalion non-admin install may fail (win xp pro) (2005-07-05) CLOSED http://python.org/sf/1232947 reopened by loewis raw_input() displays wrong unicode prompt (2005-01-10) http://python.org/sf/1099364 reopened by prikryl Python interpreter unnecessarily linked against c++ runtime (2005-08-08) http://python.org/sf/1254125 opened by Zak Kipling parser fails on long non-ascii lines if coding declared (2005-08-08) CLOSED http://python.org/sf/1254248 opened by Oleg Noga Docs for list.extend() are incorrect (2005-08-08) CLOSED http://python.org/sf/1254362 opened by Kent Johnson "appropriately decorated" is undefined in MultiFile.push doc (2005-08-09) http://python.org/sf/1255218 opened by Alan float('-inf') (2005-08-10) http://python.org/sf/1255395 opened by Steven Bird bug in use of __getattribute__ ? (2005-08-10) CLOSED http://python.org/sf/1256010 opened by sylvain ferriol Bugs Closed ___________ numarray in debian python 2.4.1 (2005-08-02) http://python.org/sf/1249903 closed by birkenfeld incorrect description of range function (2005-08-02) http://python.org/sf/1250306 closed by birkenfeld isinstance() fails depending on how modules imported (2005-08-01) http://python.org/sf/1249615 closed by hgibson50 set of pdb breakpoint fails (2005-07-30) http://python.org/sf/1248127 closed by birkenfeld Fail codecs.lookup() on 'mbcs' and 'tactis' (2005-08-04) http://python.org/sf/1251921 closed by loewis os.system on win32 can't handle pathnames with spaces (2005-08-05) http://python.org/sf/1252733 closed by salty-horse distutils: MetroWerks support can go (2005-07-17) http://python.org/sf/1239948 closed by jackjansen non-admin install may fail (win xp pro) (2005-07-05) http://python.org/sf/1232947 closed by loewis segfault in os module (2005-06-24) http://python.org/sf/1226969 closed by loewis LINKCC incorrect (2005-04-25) http://python.org/sf/1189330 closed by loewis parser fails on long non-ascii lines if coding declared (2005-08-08) http://python.org/sf/1254248 closed by doerwalter Docs for list.extend() are incorrect (2005-08-08) http://python.org/sf/1254362 closed by birkenfeld bug in use of __getattribute__ ? (2005-08-10) http://python.org/sf/1256010 closed by birkenfeld

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Python + Ping
by Joseh Martins 10 Aug '05

10 Aug '05

Hello Everybody, I´m a beginner in python dev.. Well, i need to implement a external ping command and get the results to view the output. How can I do that? Per example, i need to ping and IP address and need to know if the host is down or up. Tka a lot?

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Sourceforge CVS down?
by Neil Schemenauer 10 Aug '05

10 Aug '05

I've been getting: ssh: connect to host cvs.sourceforge.net port 22: Connection refused for the past few hours. Their "Site News" doesn't say anything about downtime. Neil

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PSF grant / contacts
by Greg Wilson 09 Aug '05

09 Aug '05

Hi, I'm working with support from the Python Software Foundation to develop an open source course on basic software development skills for people with backgrounds in science and engineering. I have a beta version of the course notes ready for review, and would like to pull in Python-friendly people in sci&eng to look it over and give me feedback. If you know people who fit this bill (particularly people who might be interested in following along with a trial run of the course this fall), I'd be grateful for pointers. Thanks, Greg Wilson

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PEP 348 and ControlFlow
by Eric Nieuwland 09 Aug '05

09 Aug '05

Dear all, Sorry to bring this up again, but I think there is an inconsistency in PEP 348 in its current formulation. From PEP: "In Python 2.4, a bare except clause will catch any and all exceptions. Typically, though, this is not what is truly desired. More often than not one wants to catch all error exceptions that do not signify a "bad" interpreter state. In the new exception hierarchy this is condition is embodied by Exception. Thus bare except clauses will catch only exceptions inheriting from Exception." So, bare except will catch anything that is an Exception. This includes GeneratorExit and StopIteration, which contradicts: "It has been suggested that ControlFlowException should inherit from Exception. This idea has been rejected based on the thinking that control flow exceptions typically should not be caught by bare except clauses, whereas Exception subclasses should be." To me this means GeneratorExit and StopIteration are to be taken out of the Exception subtree. It seems to me rather awkward to put them at the same level as Exception and TerminatingException. So there comes the old (yeah, I know REJECTED) idea of a ControlFlowException class, right next to Exception and TerminatingException: BaseException +TerminatingException + ... + Exception + ... + ControlFlowException + GeneratorExit + StopIteration Is my logic flawed (again ;-)? --eric Eric Nieuwland

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