Mailman 3 December 2004 - Python-Dev

RE: [Python-Dev] Re: 2.4 news reaches interesting places
by Robert Brewer 09 Dec '04

09 Dec '04

Anthony Baxter wrote: > FWIW, I was planning on writing a tutorial (working title: > "Making Python Code Not Suck") for some conference > or another... Perhaps, given your high profile in the Python developer community, you might reconsider the title? Little details like that are what PR is made of. Imagine Bush's next Executive Order being titled "Making American [Business|Military|People] Not Suck"... ;) Robert Brewer MIS Amor Ministries fumanchu(a)amor.org

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How to install tile (or any other tcl module)
by Stephen Kennedy 09 Dec '04

09 Dec '04

I've been trying to get Tile to work with python. It can make your tkinter apps look like http://tktable.sourceforge.net/tile/screenshots/demo-alt-unix.png See http://tktable.sourceforge.net/tile/ Under linux I built tile from source, installed and it just works. import Tkinter root = Tkinter.Tk() root.tk.call('package', 'require', 'tile') root.tk.call('namespace', 'import', '-force', 'ttk::*') root.tk.call('tile::setTheme', 'alt') ### Widgets are now pretty! Under win32, I installed the binary package into python/tcl (i.e. python/tcl/tile0.5) with all the other tcl packages, but tcl can't find it. Any ideas? Traceback (most recent call last): File "Script1.py", line 5, in ? root.tk.call('package', 'require', 'tile') _tkinter.TclError: can't find package tile Stephen.

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Re: [Python-checkins] python/dist/src/Lib/test test_shutil.py, 1.10, 1.11
by Michael Hudson 07 Dec '04

07 Dec '04

jlgijsbers(a)users.sourceforge.net writes: > Update of /cvsroot/python/python/dist/src/Lib/test > In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv20531 > > Modified Files: > test_shutil.py > Log Message: > SF bug #1076467: don't run test_on_error as root, as the permission > errors don't get provoked that way. Also add a bunch of cross-references > to bugs. > > > Index: test_shutil.py > =================================================================== > RCS file: /cvsroot/python/python/dist/src/Lib/test/test_shutil.py,v > retrieving revision 1.10 > retrieving revision 1.11 > diff -u -d -r1.10 -r1.11 > --- test_shutil.py 23 Nov 2004 09:27:27 -0000 1.10 > +++ test_shutil.py 6 Dec 2004 20:50:15 -0000 1.11 > @@ -16,7 +16,10 @@ > filename = tempfile.mktemp() > self.assertRaises(OSError, shutil.rmtree, filename) > > - if hasattr(os, 'chmod') and sys.platform[:6] != 'cygwin': > + # See bug #1071513 for why we don't run this on cygwin > + # and bug #1076467 for why we don't run this as root. > + if (hasattr(os, 'chmod') and sys.platform[:6] != 'cygwin' > + and os.getenv('USER') != 'root'): Is that really the best way to check for root? It may be, I guess, but I'd have expected os.geteuid() to be more reliable... Or is it os.getuid()? I always get confused by these functions... Cheers, mwh -- <glyph> CDATA is not an integration strategy. -- from Twisted.Quotes

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decorators article for DDJ?
by Greg Wilson 07 Dec '04

07 Dec '04

Hi folks. Is anyone interested in doing an article on Python decorators for "Doctor Dobb's Journal"? If so, please drop me a line... Thanks, Greg

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Re: [Python-Dev] [Python 2.4] PyInt_FromLong returning NULL
by Tim Peters 07 Dec '04

07 Dec '04

[Andreas Jung] > Sorry, false alarm :-( There assignment of the NULL occurs in the > if-clause of the corresponding code (I have overseen the ASSIGN > call): Thanks for the followup! > if (! PyInt_Check(p)) > { > if (PyDict_Check(p)) > { > if (PyString_Check(name) || > PyUnicode_Check(name)) > { > ASSIGN(p, PyObject_GetItem(p, name)); > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > if (p == NULL) { > puts("PyObject returned NULL"); > PyErr_Clear(); > } > } > else > p = PyInt_FromLong((long)1); > > ...doing some further investigations on that. I note that all of this is nested inside another "if (p) {...}" block. That implies the "p = PyInt_FromLong((long)1);" line is at least a memory leak: it overwrites p without decref'ing p first.

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[Python 2.4] PyInt_FromLong returning NULL
by Andreas Jung 07 Dec '04

07 Dec '04

While using Zope 2.7 with Python 2.4 we discovered some strange behaviour of the security machinery. I could track this down to some Zope code in cAccessControl.c where an Unauthorized exception is raised because of a call to PyInt_FromLong(1) which returns NULL. What could be the reason that such a "stupid" call return NULL in a reproducable way? -aj

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Re: [Python-Dev] [Python 2.4] PyInt_FromLong returning NULL
by Tim Peters 07 Dec '04

07 Dec '04

[Andreas Jung] > While using Zope 2.7 Do you mean 2.7, or do you mean 2.7.3, or ...? > with Python 2.4 we discovered some strange behaviour > of the security machinery. > I could track this down to some Zope code in cAccessControl.c > where an Unauthorized exception is raised because of a call to > PyInt_FromLong(1) which returns NULL. What could be the > reason that such a "stupid" call return NULL in a reproducable > way? Any C function that returns a Python object can return NULL if malloc() says there's not enough memory to create a new object. PyInt_FromLong() actually allocates about 1KB at a time, and will return NULL if malloc() can't find that much. OTOH, 1KB isn't big, and PyInt_FromLong(1) specifically should be returning a shared reference to a pre-existing PyIntObject (a number of small integer objects are constructed at Python initialization time, and PyInt_FromLong() returns references to them instead of allocating new memory). So PyInt_FromLong(1) should have taken this path: v = small_ints[ival + NSMALLNEGINTS]; But if a wild store had stuffed NULL into 1's slot in the small_ints vector, the *next* line would have blown up with a NULL-pointer dereference before PyInt_FromLong() could have returned: Py_INCREF(v); return (PyObject *) v; So, in all, it appears impossible for PyInt_FromLong(1) to return NULL. If it's reproducible, run it under a debugger and step into the errant PyInt_FromLong(1) to see what's happening? Could be a compiler optimization bug (while rare, they have happened in Python).

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Re: long number multiplication
by Nick Coghlan 07 Dec '04

07 Dec '04

Christopher A. Craig wrote: >>i needed to implement this myself and was thinking of storing the digits >>of an integer in a list. > > > That's sort of what Python does except the "digits" are 15 bits, > not base 10. Doing it in base 10 would be a huge pain because of the > problems with base 10->base 2 conversion. > Indeed. Python's Decimal data type stores the digits in a list for ease of power of 10 multiplication & rounding (the precision rules means a *lot* of that goes on). However, it converts that list of digits to a long integer in order to do addition, multiplication or division. Cheers, Nick. -- Nick Coghlan | ncoghlan(a)email.com | Brisbane, Australia --------------------------------------------------------------- http://boredomandlaziness.skystorm.net

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Weekly Python Patch/Bug Summary
by Kurt B. Kaiser 06 Dec '04

06 Dec '04

Patch / Bug Summary ___________________ Patches : 259 open ( +1) / 2705 closed ( +4) / 2964 total ( +5) Bugs : 800 open (-12) / 4662 closed (+20) / 5462 total ( +8) RFE : 160 open ( +0) / 137 closed ( +1) / 297 total ( +1) New / Reopened Patches ______________________ add key (2004-12-01) CLOSED http://python.org/sf/1077353 opened by Steven Bethard Simple webbrowser fix for netscape -remote (2004-12-02) http://python.org/sf/1077979 opened by Josh Cherry readline does not need termcap (2004-12-01) http://python.org/sf/1076826 reopened by nijel Make cgi.py use logging module (2004-12-05) http://python.org/sf/1079729 opened by Josh Hoyt Make cgi.py use email instead of rfc822 or mimetools (2004-12-05) http://python.org/sf/1079734 opened by Josh Hoyt list sort is not "in place" (2004-12-06) http://python.org/sf/1080078 reopened by rhettinger list sort is not "in place" (2004-12-06) CLOSED http://python.org/sf/1080078 opened by Heikki Orsila Patches Closed ______________ add key (2004-12-02) http://python.org/sf/1077353 closed by rhettinger readline does not need termcap (2004-12-01) http://python.org/sf/1076826 closed by loewis raise error for common mistake with subprocess (2004-11-23) http://python.org/sf/1071755 closed by astrand list sort is not "in place" (2004-12-06) http://python.org/sf/1080078 closed by rhettinger list sort is not "in place" (2004-12-06) http://python.org/sf/1080078 closed by tim_one AUTH PLAIN in smtplib (2004-11-30) http://python.org/sf/1075928 closed by jlgijsbers New / Reopened Bugs ___________________ problem with make test on OS/X (2004-12-02) CLOSED http://python.org/sf/1077302 opened by Ian Holsman threads: segfault or Py_FatalError at exit (2004-11-08) http://python.org/sf/1061968 reopened by mhammond assert fail to threw exception when run python with '-O' (2004-12-02) CLOSED http://python.org/sf/1077862 opened by tj128 Python2.4: building '_socket' extension fails with `INET_ADD (2004-12-03) http://python.org/sf/1078245 opened by Michael Ströder Docs for run() methods are misleading (2004-12-04) CLOSED http://python.org/sf/1078905 opened by Kent Johnson Email.Header encodes non-ASCII content incorrectly (2004-12-04) http://python.org/sf/1078919 opened by Tessa Lau Incorrect error message (somewhat) (2004-12-04) http://python.org/sf/1079011 opened by Gerrit Holl datetime changes missing from "Porting from 2.3 to 2.4" (2004-12-04) http://python.org/sf/1079134 opened by Sadruddin Rejeb python-2.4.msi install error (2004-12-05) http://python.org/sf/1079545 opened by maharal IDLE and old color themes (2004-12-06) http://python.org/sf/1080387 opened by projecktzero Bugs Closed ___________ threads: segfault or Py_FatalError at exit (2004-11-07) http://python.org/sf/1061968 closed by arigo Tutorial corrections (2004-12-01) http://python.org/sf/1076955 closed by rhettinger test_shutil fails on x86-64 // Suse 9.1 (2004-12-01) http://python.org/sf/1076467 closed by jlgijsbers test test_unicodedata failed (2004-12-01) http://python.org/sf/1076795 closed by lemburg Problem testing python 2.4 (2004-12-01) http://python.org/sf/1077103 closed by lemburg re module segfaulting in large regular expression (2004-11-24) http://python.org/sf/1072259 closed by niemeyer Memory fault pyexpat.so on SGI (2004-11-30) http://python.org/sf/1075990 closed by akuchling assert fail to threw exception when run python with '-O' (2004-12-02) http://python.org/sf/1077862 closed by tim_one Errors and omissions in logging module documentation (2004-11-28) http://python.org/sf/1074693 closed by vsajip xml.dom.minidom produces errors with certain unicode chars (2004-11-27) http://python.org/sf/1074200 closed by effbot test test_re produced unexpected output (2004-12-01) http://python.org/sf/1076791 closed by nijel ^Z doesn't exit interpreter - 2.4c1 & Win2K (2004-11-26) http://python.org/sf/1073736 closed by facundobatista test_macostools failure on OS X (2004-12-01) http://python.org/sf/1077302 closed by bcannon PyGILState_Ensure() deadlocks (ver 2.4) (2004-11-29) http://python.org/sf/1075703 closed by andivajda calendar.weekheader() undocumented (2004-05-04) http://python.org/sf/947894 closed by doerwalter Docs for unittest run() methods are misleading (2004-12-04) http://python.org/sf/1078905 closed by rhettinger Another message that croaks email.FeedParser (2004-11-30) http://python.org/sf/1076485 closed by bwarsaw Windows msi doesn't install site-packages directory (2004-11-23) http://python.org/sf/1071594 closed by loewis win32con missing codes VK_VOLUME_MUTE, VK_BROWSER_BACK, ... (2004-11-16) http://python.org/sf/1067153 closed by loewis test_sutil fails on cygwin (2004-11-23) http://python.org/sf/1071513 closed by jlgijsbers CFLAGS, CPPFLAGS, LDFLAGS are NOT used when building modules (2004-05-17) http://python.org/sf/955197 closed by bcannon RFE Closed __________ Python Interpreter embedded in small memory system (2004-11-30) http://python.org/sf/1076478 closed by rhettinger

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RE: [Python-Dev] Deprecated xmllib module
by Tony Meyer 06 Dec '04

06 Dec '04

> As far as I can tell, there are no CSS or XML 1.1 parsers for > Python, period. This belongs on c.l.p, I suppose, but the first page of google results includes: <http://www.python.org/pypi?:action=display&name=TG%20CSS%20Tools&version=1. 0a1> <http://cthedot.de/cssutils/> =Tony.Meyer

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