Mailman 3 January 2004 - Python-Dev

re: The os module, unix and win32
by Arthur Jan. 13, 2004

Jan. 13, 2004

Barry writes >At 09-01-2004 04:02, Arthur wrote: >>But tangentially on topic - is the possibility of getting enough of the >>win32all API functions into the core distribution to give more Windows >>standard functionality to disutils - start menu entries in particular. >That needs COM support and that's a lot more API that is proposed for >popen5 and similar. By the time you have COM support you have committed >to include all of win32all in standard python. Which is basically what >ActiveState Python is. But Thomas (who should know) wrote: >bdist_wininst can create Windows shortcuts in it's postinstall script. Thomas (off-list) had also given me a cite to some code, which I haven't had the opportunity to try to digest. Is this a semantic issue as to what can and cannot be done on Windows with disutils? I thought I gathered from Thomas that the functionality he is referencing is new as of 2.3. Is this the wrong place to be pursuing this? Art

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a possible bug (or something I don't understand)?
by Ognen Duzlevski Jan. 13, 2004

Jan. 13, 2004

Hi, Python 2.3.3 (#1, Dec 24 2003, 00:21:04) [GCC 3.3] on linux2 Please forgive me if I am bold in the assumption of a bug. It probably is not a bug but sure has me puzzled. I have written a function using PyInline to modify three matrices (or, lists of lists) of integers. The function appears to run fine. After the function has been called, I am using the following assignment: minscore = min(scoremat[tlen][qlen],delmat[tlen][qlen],insertmat[teln][qlen]) However, the call breaks with: TypeError: an integer is required Then I went a step further and here is the sequence of calls: def SeqMapping(tseq,qseq,seqmap,invmap,tlen,qlen): # determine each energy components given the alignments # modifies seqmap, invmap # returns (minscore,identical) global LARGESCORE,OPENGAPPENALTY,ONEINDELPENALTY,EMPTY opengappenalty = OPENGAPPENALTY oneindelpenalty = ONEINDELPENALTY largescore = LARGESCORE empty = EMPTY minscore = largescore scoremat = [] insertmat = [] delmat = [] st = time.clock() DynAlign(scoremat,insertmat,delmat,''.join(tseq),''.join(qseq),tlen,qlen) et = time.clock() print "time in nested loop: %f" % (et-st) m1 = int(delmat[tlen][qlen]) print m1 m2 = int(insertmat[tlen][qlen]) print m2 m3 = int(scoremat[tlen][qlen]) print m3 #minscore = min(int(delmat[tlen][qlen]), int(insertmat[tlen][qlen]), \ #int(scoremat[tlen][qlen])) print min(m1,m2,m3) This is the output: time in nested loop: 0.250000 403 394 402 Traceback (most recent call last): File "./primegens_old.py", line 1653, in ? GetSegment() File "./primegens_old.py", line 1496, in GetSegment tmp_score,sim = SeqMapping(seq[ndx1],seq[0],seqmapping,inversemapping,length[ndx1],length[0]) File "./primegens_old.py", line 676, in SeqMapping print min(m1,m2,m3) TypeError: an integer is required Cleary scoremat[tlen][qlen], delmat[tlen][qlen] and insertmat[tlen][qlen] are integers (I even had type() show me they are 'int'). I am even using int() to make sure it is all right. Still the output is as above and I am really puzzled. Is it something really trivial I am missing? Thank you, Ognen p.s. just in case, here is the inlined C function: from PyInline import C import __main__ C.Builder(code=""" void DynAlign(PyObject *scoremat,PyObject *insertmat,PyObject *delmat,PyObject *tseq,PyObject *qseq,PyObject *tlen,PyObject$ { #define MIN(a,b) ((a) < (b) ? (a):(b)) int opengappenalty; int oneindelpenalty; int largescore; int cnst; int ndx1, ndx2; int tl,ql; char *tsq; char *qsq; opengappenalty = 4; oneindelpenalty = 2; largescore = 999999; tl = PyInt_AsLong(tlen); ql = PyInt_AsLong(qlen); tsq = PyString_AsString(tseq); qsq = PyString_AsString(qseq); for (ndx1=0; ndx1<=tl; ndx1++) { PyList_Append(scoremat,PyList_New(ql+1)); PyList_Append(insertmat,PyList_New(ql+1)); PyList_Append(delmat,PyList_New(ql+1)); } for (ndx1=1; ndx1<=tl; ndx1++) { long num; PyObject* inner_list = NULL; PyObject* item; num = opengappenalty + (ndx1 * oneindelpenalty); inner_list = PyList_GetItem(scoremat,ndx1); item = PyInt_FromLong(num); PyList_SetItem(inner_list,0,PyNumber_Int(item)); inner_list = PyList_GetItem(insertmat,ndx1); PyList_SetItem(inner_list,0,PyNumber_Int(item)); inner_list = PyList_GetItem(delmat,ndx1); item = PyInt_FromLong(largescore); PyList_SetItem(inner_list,0,PyNumber_Int(item)); } for (ndx1=1; ndx1<=ql; ndx1++) { long num; PyObject* inner_list = NULL; PyObject* item; num = opengappenalty + (ndx1 * oneindelpenalty); inner_list = PyList_GetItem(scoremat,0); item = PyInt_FromLong(num); PyList_SetItem(inner_list,ndx1,PyNumber_Int(item)); inner_list = PyList_GetItem(delmat,0); PyList_SetItem(inner_list,ndx1,PyNumber_Int(item)); inner_list = PyList_GetItem(insertmat,0); item = PyInt_FromLong(largescore); PyList_SetItem(inner_list,ndx1,PyNumber_Int(item)); } cnst = oneindelpenalty + opengappenalty; for (ndx1=1; ndx1<=tl; ndx1++) { for (ndx2=1; ndx2<=ql; ndx2++) { PyObject *delm1 = NULL; PyObject *delm2 = NULL; PyObject *scmat1 = NULL; PyObject *scmat2 = NULL; PyObject *insmat1 = NULL; PyObject *insmat2 = NULL; PyObject *item = NULL; long n1,n2,n3,minm,add; delm1 = PyList_GetItem(delmat,ndx1); delm2 = PyList_GetItem(delmat,ndx1-1); scmat1 = PyList_GetItem(scoremat,ndx1); scmat2 = PyList_GetItem(scoremat,ndx1-1); insmat1 = PyList_GetItem(insertmat,ndx1); insmat2 = PyList_GetItem(insertmat,ndx1-1); item = PyList_GetItem(delm2,ndx2); n1 = PyInt_AsLong(item) + oneindelpenalty; item = PyList_GetItem(scmat2,ndx2); n2 = PyInt_AsLong(item) + cnst; item = PyList_GetItem(insmat2,ndx2); n3 = PyInt_AsLong(item) + cnst; minm = MIN(n1,MIN(n2,n3)); item = PyInt_FromLong(minm); PyList_SetItem(delm1,ndx2,PyNumber_Int(item)); item = PyList_GetItem(insmat1,ndx2-1); n1 = PyInt_AsLong(item) + oneindelpenalty; item = PyList_GetItem(scmat1,ndx2-1); n2 = PyInt_AsLong(item) + cnst; item = PyList_GetItem(delm1,ndx2-1); n3 = PyInt_AsLong(item) + cnst; minm = MIN(n1,MIN(n2,n3)); item = PyInt_FromLong(minm); PyList_SetItem(insmat1,ndx2,PyNumber_Int(item)); if (tsq[ndx1-1] == qsq[ndx2-1]) add = -1; else add = 1; item = PyList_GetItem(scmat2,ndx2-1); n1 = PyInt_AsLong(item); item = PyList_GetItem(delm2,ndx2-1); n2 = PyInt_AsLong(item); item = PyList_GetItem(insmat2,ndx2-1); n3 = PyInt_AsLong(item) + cnst; minm = MIN(n1,MIN(n2,n3)) + add; item = PyInt_FromLong(minm); PyList_SetItem(scmat1,ndx2,PyNumber_Int(item)); } } } """,targetmodule=__main__).build()

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Re: [Python-Dev] patching webbrowser.py for OS X
by Stephan Deibel Jan. 13, 2004

Jan. 13, 2004

> On Jan 13, 2004, at 1:51 PM, Stephan Deibel wrote: > > [ 728278 ] Multiple webbrowser.py bug fixes / improvements Sorry, should have posted the link. Apparently it's not easy to find this w/ the above info: http://sf.net/tracker/index.php?func=detail&aid=728278&group_id=5470&atid=3… - Stephan

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Re: [Python-Dev] patching webbrowser.py for OS X
by Stephan Deibel Jan. 13, 2004

Jan. 13, 2004

Just wanted to make sure people looking at webbrowser.py know about the following patch I posted on Source Forge last April: [ 728278 ] Multiple webbrowser.py bug fixes / improvements It makes quite a few changes, including fixing some OS X support. Hopefully some form of this can make it into 2.4... I've been lurking here for years but I think this is my first post so I'll do a quick introduction: I'm co-founder of Archaeopteryx Software, Inc, which makes Wing IDE, one of the commercial IDEs for Python. I also run pythonology.org, edited the Python Success Stories collection found there, and try to help out with Python advocacy and things like press releases. Thanks to all for Python's elegance and incredibly high quality! Stephan Deibel -- Wing IDE for Python Archaeopteryx Software, Inc Take Flight! www.wingide.com

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[872326] generator expression implementation
by Armin Rigo Jan. 13, 2004

Jan. 13, 2004

Hello, Sorry to bring this out again, I didn't find a reference about the following issue in generator expressions: (for x in expr) When should 'expr' be evaluated? A priori, one would expect it to be evaluated immediately, but it is not what the suggested implementation does: def __gen(): for x in expr: yield x __gen() This only computes expr when the first element of the generator is needed (so it may even never be computed). Is it done purposefully? It may also be surprising to see the anonymous generator in tracebacks if an exception is raised within expr. A bientot, Armin.

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patching webbrowser.py for OS X
by Brendan O'Connor Jan. 13, 2004

Jan. 13, 2004

Hi wonderful python folks, I was trying to use the webbrowser module with OS X's preinstalled python; I'm not very familiar with OS X, but I just patched webbrowser.py to use the very generic "open" command, which works for the simple webbrowser.open(url). I've heard that Fink or another port would be more complete; on the other hand, I'm using computers where I can't install software myself, so this is useful for me. Any thoughts or issues? -Brendan (student) --- webbrowser.py Mon Jan 12 11:43:26 2004 +++ /usr/lib/python2.2/webbrowser.py Sun Jul 14 23:33:32 2002 @@ -1,6 +1,4 @@ """Interfaces for launching and remotely controlling Web browsers.""" -#patched to work on os x native python - import os import sys @@ -299,15 +297,6 @@ # so don't mess with the default! _tryorder = ["internet-config"] register("internet-config", InternetConfig) - -# -# Platform support for OS X (builtin unix version) -# the os x 'open' command opens ANYTHING including url's. -# ISSUE: what if InternetConfig is present? Is this OK? - -if sys.platform[:6] == 'darwin' and _iscommand("open"): - _tryorder = ['open'] - register("osx", None, GenericBrowser("open %s")) # # Platform support for OS/2

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Tracebacks into C code
by Edward C. Jones Jan. 12, 2004

Jan. 12, 2004

Suppose: I have a Python extension written in C. "My_Func" is a function in the extension which is visible at the Python level. "My_Func" calls the C function "C_func1". "C_func1" calls the C function "C_func2". "C_func2" raises an exception by calling something like "PyErr_SetString". How do I make the Python traceback include "C_func1" and "C_func2"?

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RE: [Python-Dev] collections module
by Moore, Paul Jan. 12, 2004

Jan. 12, 2004

From: Raymond Hettinger > I am frankly surprised that so many here think that a collections module > would be bad for the language. Go figure. It's not like these are new, > untried ideas -- the goal was supposed be improving productivity by > providing higher level tools. A fast underlying implementation was just > icing on the cake. I think the "fast implementation" issue has triggered people's comments, rather than the "higher level tools" one. For the record, I'm +1 on the idea (as far as "higher level tools" goes). I'm not too bothered, in practice, how efficient the implementation is, as long as it's not visibly slower than using lists/dicts directly :-) Paul.

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PyCon Reminder: Proposal deadline 1/15 (LAST WARNING)
by Guido van Rossum Jan. 12, 2004

Jan. 12, 2004

This is the *last* reminder that the deadline for sending proposals for presentations at PyCon DC 2004 is January 15, 2004. That's upcoming Thursday! I'm also reminding everybody, speakers and non-speakers, of the upcoming deadline for Early Bird Registration: January 31. Until then, the registration fee is $175 (student rate $125); after that date, the registration price goes up to $250 (student rate $150). Don't forget to register! (Sorry, there's no speakers discount.) If you're coming to the conference, consider coming a few days early and participate in a coding sprint. Sprints are free (courtesy of the PSF!), and are held from Saturday March 20 through Tuesday March 23 (i.e. the four days leading up to the conference). For more info on sprints, see http://pycon.org/dc2004 . Now back to proposal submissions: We are interested in any and all submissions about uses of Python and the development of the language. Since there is expected to be a strong educational community presence for the next PyCon, teaching materials of various kinds are also encouraged. You can submit your proposal at: http://submit.pycon.org/ For more information about proposals, see: http://www.pycon.org/dc2004/cfp/ If you have further questions about the submission web interface or the format of submissions, please write to: pycon-organizers(a)python.org We would like to publish all accepted papers on the web. If your paper is accepted and you prepare an electronic presentation (in PDF, PythonPoint or PowerPoint) we will also happily publish that on the web site once PyCon is over. If you don't want to make a formal presentation, there will be a significant amount of Open Space to allow for informal and spur-of-the-moment presentations for which no formal submission is required. There will also be several Lightning Talk sessions (five minutes or less). About PyCon: PyCon is a community-oriented conference targeting developers (both those using Python and those working on the Python project). It gives you opportunities to learn about significant advances in the Python development community, to participate in a programming sprint with some of the leading minds in the Open Source community, and to meet fellow developers from around the world. The organizers work to make the conference affordable and accessible to all. PyCon DC 2004 will be held March 24-26, 2004 in Washington, D.C. The keynote speaker is Mitch Kapor of the Open Source Applications Foundation (http://www.osafoundation.org/). There will be a four-day development sprint before the conference. We're looking for volunteers to help run PyCon. If you're interested, subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers Don't miss any PyCon announcements! Subscribe to http://mail.python.org/mailman/listinfo/pycon-announce You can discuss PyCon with other interested people by subscribing to http://mail.python.org/mailman/listinfo/pycon-interest The central resource for PyCon DC 2004 is http://www.pycon.org/ Pictures from last year's PyCon: http://www.python.org/cgi-bin/moinmoin/PyConPhotos I'm looking forward to seeing you all in DC in March!!! --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Pycon-organizers mailing list Pycon-organizers(a)python.org http://mail.python.org/mailman/listinfo/pycon-organizers

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CJKCodecs integration into Python
by Hye-Shik Chang Jan. 12, 2004

Jan. 12, 2004

Hello! I just submitted a patch to integrate CJKCodecs into python. (http://www.python.org/sf/873597) As I remember, the problems mentioned on a previous discussion about this are these three: 1) Size Python+CJKCodecs is just 102% of the original by source size and 104% by source line counts. Installed binary size is about 2.5MB. I think it's not a big size for todays harddisks. 2) Backward Compatibility with C/J/K Codecs with ChineseCodecs: it's perfectly compatible except ChineseCodecs' trivial bugs. with JapaneseCodecs: it's now compatible enough to use. the only difference is ISO-2022-JP's error handling for bytes set MSB which is very unusual and invalid. with KoreanCodecs: it's perfectly compatibie. 3) Maintenance I can maintain it on Python CVS by myself now. :) And I put cjkcodecs files into Modules/cjkcodecs/, but I can't sure this is the right place to put them. Any opionions will be appreciated. Thank you! Hye-Shik

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