🌐 Mailman 3 December 2006 - Pythonmac-SIG - python.org

So what can we do to clean up the wiki?
by skip＠pobox.com Jan. 10, 2007

Jan. 10, 2007

I realize Bob's kind of hamstrung at the moment. I set up my login to the wiki to monitor all changes. I went through and fixed what I could. Without revert or DeletePage actions it's a bit tough. In addition, when I went to restore the FAQ and DrawBot content it told me "too many links" and wouldn't let me replace the crap with the correct content! I had to do them in several edits... If someone knows how to delete pages in that old version of Moin (SystemInfo barfs with a MemoryError, so I can't tell how old it is), please search for "junk" or "spam" in the text of all pages. Many of the pages that are returned should just be deleted. Skip

7 9

cyptes problem on MacOS X
by Russell E. Owen Jan. 2, 2007

Jan. 2, 2007

I've been trying out ctypes (from MacPython 2.5) on MacOS X on a PPC Mac and have run into a problem. I hope I'm just doing something stupid, but it seems to match the tutorial so I'm really puzzled: import ctypes libc = ctypes.CDLL("libc.dylib") libc.printf("int=%d float=%f double=%f\n", ctypes.c_int(1), ctypes.c_float(2.0), ctypes.c_double(3.0)); results in: int=1 float=-1.996124 double=0.000000 I realize the docs doesn't actually claim to handle dylib files, but I've seen at least some info on the web that claims it works. One site suggested the need for ctypes.RTLD_GLOBAL to CDLL but adding it made no difference. On a related subject...assuming I can get this to work...does anyone have any idea how the speed of ctypes relates to programming a python C extension or using SWIG? This is mostly for use with NumPy and interfacing python to C/C++-based heavy duty astronomical image processing code. Other suggestions are welcome. We'll mostly be interfacing to C++ so I've considered trying out Boost, but it hasn't had an update in years which worries me. Robustness, ease of use and speed are all major requirements. Linux and MacOS X are the main platforms. -- Russell

6 6

Hello, and Wiki vandalism
by Uche Ogbuji Dec. 31, 2006

Dec. 31, 2006

Hi all, I just switched to a MacBook Pro for my primary dev box, so I guess I'll be hanging out here. I was trying to get started and went to the WIki, the FAQ in particular http://pythonmac.org/wiki/FAQ The page was spammed/vandalized on the 18th. I checked recent changes and a lot of pages got this treatment in mid-December,. I'm surprised they haven't been fixed, considering the importance of these pages. I know it's probably just a lack of volunteer time but I also know MoinMoin has some serviceable anti-spam features. I tried to fix the FAQ page myself reverting to the pre-spam version, but there seems to be some bug where preview shows the fixed version, but when I submit, it seems to be re-submitting the spam version. Really strange. Leaves me wondering what's the status of admin on the wiki. Thanks, and happy hols, all. -- Uche Ogbuji Work: The Kadomo Group, Inc. http://uche.ogbuji.net http://kadomo.com http://copia.ogbuji.net Lead dev at http://4Suite.org Articles: http://uche.ogbuji.net/tech/publications/

3 3

Python and Zeroconf?
by Tim Ansell Dec. 26, 2006

Dec. 26, 2006

Hello, My game is using ZeroConf to find local game servers. Under Linux I can use avahi or pyZeroConf to locate the servers (depending if avahi is installed or not). However as Mac OS X has it's own mDNS server I can't use either of these options. Is there a way to interface with the Mac's Zeroconf (Bonjour)? I have found http://www-unix.mcs.anl.gov/fl/research/accessgrid/bonjour-py/bonjour-py.ht… however there doesn't seem to be Universal Python binaries which I need to build binary packages. Anyway have any ideas? Thanks for your time. Tim Ansell

4 3

How to fathom appscript
by Hamish Allan Dec. 19, 2006

Dec. 19, 2006

Hi, I'm new to appscript (and relatively new to python) and I'm having trouble fathoming out how to determine what can be done with each type of object. For example, itunes = app('iTunes') x = itunes.sources.first.playlists[its.name.contains('MyName')] This code fetches any playlists containing the string 'MyName'. But I want an exact match. Using 'equals' rather than 'contains' doesn't work. How do I find out which operations its.name supports? And more generally, what is possible in other similar situations with different objects? I also want to do what the following code suggests: x = itunes.sources.first.playlist_folders[its.name.equals('MyFolder')] y = itunes.sources.first.playlists[its.parent.equals(x)] Is this possible? Many thanks, Hamish

2 1

About Obj-C 2.0 language bridge
by Nehemiah Dacres Dec. 18, 2006

Dec. 18, 2006

I just wanted to bring the attention to the community that there will be a python/Objective C <http://theocacao.com/document.page/373> <http://theocacao.com/document.page/373>language bridge implemented come the release of Leopard, Mac OS 10.5<http://developer.apple.com/leopard/overview/apptech.html> . These are a few questions I wanted to ask the MacPython Dev team I was wondering how are we going to tailor the MacPython programming environment for those who want to use the bridge in programming for python? Will Py2App take advantage of this new ability and if so, how? How does this contrast with using PyObjC? -- "lalalalala! it's not broken because I can use it" http://linux.slashdot.org/comments.pl?sid=194281&threshold=1&commentsort=0&…

3 2

Universal binary SciPy on OS X
by Josh Marshall Dec. 15, 2006

Dec. 15, 2006

I have been trying to build a universal SciPy that works, so I can include it in a redistributable application I build with py2app. The one at http://pythonmac.org/packages/py24-fat/index.html is *incomplete*, it contains some dynamic libraries which are ppc only, which is what also happens when I try to build a universal binary myself.Some libs build fine, but some are only a single arch (the native one). The results of for FILE in `find . | grep '\.so'` ; do lipo -info $FILE ; done are: ------------------------------------------------------------------------ ----------- Architectures in the fat file: ./scipy/cluster/_vq.so are: i386 ppc Non-fat file: ./scipy/fftpack/_fftpack.so is architecture: ppc Non-fat file: ./scipy/fftpack/convolve.so is architecture: ppc Non-fat file: ./scipy/integrate/_odepack.so is architecture: ppc Non-fat file: ./scipy/integrate/_quadpack.so is architecture: ppc Non-fat file: ./scipy/integrate/vode.so is architecture: ppc Non-fat file: ./scipy/interpolate/_fitpack.so is architecture: ppc Non-fat file: ./scipy/interpolate/dfitpack.so is architecture: ppc Architectures in the fat file: ./scipy/io/numpyio.so are: i386 ppc Architectures in the fat file: ./scipy/lib/blas/cblas.so are: i386 ppc Non-fat file: ./scipy/lib/blas/fblas.so is architecture: ppc Architectures in the fat file: ./scipy/lib/lapack/atlas_version.so are: i386 ppc Non-fat file: ./scipy/lib/lapack/calc_lwork.so is architecture: ppc Architectures in the fat file: ./scipy/lib/lapack/clapack.so are: i386 ppc Architectures in the fat file: ./scipy/lib/lapack/flapack.so are: i386 ppc Non-fat file: ./scipy/linalg/_flinalg.so is architecture: ppc Non-fat file: ./scipy/linalg/_iterative.so is architecture: ppc Architectures in the fat file: ./scipy/linalg/atlas_version.so are: i386 ppc Non-fat file: ./scipy/linalg/calc_lwork.so is architecture: ppc Architectures in the fat file: ./scipy/linalg/cblas.so are: i386 ppc Architectures in the fat file: ./scipy/linalg/clapack.so are: i386 ppc Non-fat file: ./scipy/linalg/fblas.so is architecture: ppc Non-fat file: ./scipy/linalg/flapack.so is architecture: ppc Architectures in the fat file: ./scipy/linsolve/_csuperlu.so are: i386 ppc Architectures in the fat file: ./scipy/linsolve/_dsuperlu.so are: i386 ppc Architectures in the fat file: ./scipy/linsolve/_ssuperlu.so are: i386 ppc Architectures in the fat file: ./scipy/linsolve/_zsuperlu.so are: i386 ppc Architectures in the fat file: ./scipy/ndimage/_nd_image.so are: i386 ppc Non-fat file: ./scipy/odr/__odrpack.so is architecture: ppc Non-fat file: ./scipy/optimize/_cobyla.so is architecture: ppc Non-fat file: ./scipy/optimize/_lbfgsb.so is architecture: ppc Non-fat file: ./scipy/optimize/_minpack.so is architecture: ppc Architectures in the fat file: ./scipy/optimize/_zeros.so are: i386 ppc Non-fat file: ./scipy/optimize/minpack2.so is architecture: ppc Architectures in the fat file: ./scipy/optimize/moduleTNC.so are: i386 ppc Architectures in the fat file: ./scipy/signal/sigtools.so are: i386 ppc Architectures in the fat file: ./scipy/signal/spline.so are: i386 ppc Non-fat file: ./scipy/sparse/sparsetools.so is architecture: ppc Non-fat file: ./scipy/special/_cephes.so is architecture: ppc Non-fat file: ./scipy/special/specfun.so is architecture: ppc Non-fat file: ./scipy/stats/futil.so is architecture: ppc Non-fat file: ./scipy/stats/mvn.so is architecture: ppc Non-fat file: ./scipy/stats/statlib.so is architecture: ppc Architectures in the fat file: ./scipy/stsci/convolve/_correlate.so are: i386 ppc Architectures in the fat file: ./scipy/stsci/image/_combine.so are: i386 ppc ------------------------------------------------------------------------ ----------- So I didn't pursue this any further for the time being. Since I am not an expert on the SciPy build process, I'm trying to work around this. Instead I took your (Chris') versions from http://trichech.us/? page_id=4 , both ppc and intel SuperPacks. I yanked the scipy dirs out of the packages, and called them scipy-ppc and scipy-i386. Then what I did was lipo the shared libs together, as described on Apple's site: http://developer.apple.com/opensource/buildingopensourceuniversal.html Like so: mv scipy-ppc scipy-universal cd scipy-universal for FILE in `find . | grep '\.so'` ; do file $FILE ; done # shows all ppc libs for LIB in `find . | grep '\.so'` ; do lipo -create $LIB ../scipy- i386/$LIB -output $LIB ; done for FILE in `find . | grep '\.so'` ; do file $FILE ; done # shows all universal libs, yay! cd .. sudo cp -r scipy-universal $PYTHON_SITEPACKAGES/scipy Now this works fine on my G4. I won't have a chance to test on an Intel Mac until later in the week, but this looks promising. Chris, since the package seem to be identical apart from the shared libs, you could probably do this on the SuperPack and only need to distribute one version. Could I also have some advice on how to deal with this sort of stuff. I imagine that much of it is tied up with not having an Apple-blessed Fortran compiler. (Fingers crossed for Leopard). Thanks for all your help everyone, Josh

1 0

Re: [Pythonmac-SIG] undefined symbols when making python wrapped c libs for itk
by Dan White Dec. 14, 2006

Dec. 14, 2006

Hi, Actually i see the same error message using python2.5 when building ITK python wrapping. I was wondering what i am doing wrong that ld is not seeing pytohn properly to find those symbols? Any one know what is going wrong to give error message like >> /usr/bin/ld: Undefined symbols: >> _main >> _PyArg_ParseTuple >> _PyInt_FromLong >> _PyString_FromString >> _PyTuple_New >> _PyTuple_SetItem >> _Py_InitModule4 >> collect2: ld returned 1 exit status which lib or headers or something is ld not seeing? cheers Dan On 14 Dec 2006, at 13:00, pythonmac-sig-request(a)python.org wrote: > From: "Bob Ippolito" <bob(a)redivi.com> > Date: 14 December 2006 12:28:29 GMT+02:00 > To: "Gen Kazama" <generalkernel(a)gmail.com> > Cc: pythonmac-sig(a)python.org > Subject: Re: [Pythonmac-SIG] CPython on Mac OSX > > > On 12/13/06, Gen Kazama <generalkernel(a)gmail.com> wrote: >> Hi I'm running python 2.3 on 10.4. i made an application using a >> C backend >> and a python frontend. >> >> This is a school project and although it works perfectly on the >> school >> computers, i have trouble compiling the C code correctly on the >> mac to make >> it into a python module (maybe this is because the school >> computers used >> python 2.4-ie, an updated version of Python.h). >> >> Anyway here is how I compile it at school: >> >> gcc -I /usr/include/python2.4 -c mandel.c >> gcc -shared mandel.o -o mandel.so >> >> which works with no flaws. then , I try compiling it on my mac: >> >> gcc -I /usr/include/python2.3 -c mandel.c >> gcc mandel.o -o mandel.so >> >> (note: -shared wasn't found on my mac for some reason). I get the >> following >> errors: >> >> /usr/bin/ld: Undefined symbols: >> _main >> _PyArg_ParseTuple >> _PyInt_FromLong >> _PyString_FromString >> _PyTuple_New >> _PyTuple_SetItem >> _Py_InitModule4 >> collect2: ld returned 1 exit status >> >> >> If anyone could tell me how to compile this C code into a python >> module on >> my mac, i would greatly appreciate it. thanks! > > The best way is to use distutils (or setuptools). Create a setup.py > that compiles it for you. This works on every platform, even windows. > > -bob Dr. Daniel James White BSc. (Hons.) PhD Bioimaging Coordinator Nanoscience Centre and Department of Biological and Environmental Sciences Division of Molecular Recognition Ambiotica C242 PO Box 35 University of Jyväskylä Jyväskylä FIN 40014 Finland +358 14 260 4183 (work) +358 468102840 (mobile) http://www.bioimagexd.org http://www.chalkie.org.uk dan(a)chalkie.org.uk white(a)cc.jyu.fi

2 1

CPython on Mac OSX
by Gen Kazama Dec. 14, 2006

Dec. 14, 2006

Hi I'm running python 2.3 on 10.4. i made an application using a C backend and a python frontend. This is a school project and although it works perfectly on the school computers, i have trouble compiling the C code correctly on the mac to make it into a python module (maybe this is because the school computers used python 2.4-ie, an updated version of Python.h). Anyway here is how I compile it at school: gcc -I /usr/include/python2.4 -c mandel.c gcc -shared mandel.o -o mandel.so which works with no flaws. then , I try compiling it on my mac: gcc -I /usr/include/python2.3 -c mandel.c gcc mandel.o -o mandel.so (note: -shared wasn't found on my mac for some reason). I get the following errors: /usr/bin/ld: Undefined symbols: _main _PyArg_ParseTuple _PyInt_FromLong _PyString_FromString _PyTuple_New _PyTuple_SetItem _Py_InitModule4 collect2: ld returned 1 exit status If anyone could tell me how to compile this C code into a python module on my mac, i would greatly appreciate it. thanks!

3 2

py2app plugin problem: "Error loading code"
by Niko Matsakis Dec. 13, 2006

Dec. 13, 2006

All of a sudden, for reasons I completely fail to understand, py2app- created plug-ins will no longer load in my application. I am not 100% sure if this is the right list for this kind of question: feel free to set me straight. The error I get is as follows: 2006-12-09 17:10:59.988 drachma[25673] *** -[NSBundle load]: Error loading code /Users/niko/hg/proj/drachma/src/build/Debug/drachma.app/ Contents/Resources/PyPlugin.plugin/Contents/MacOS/PyPlugin for bundle /Users/niko/hg/proj/drachma/src/build/Debug/drachma.app/ Contents/Resources/PyPlugin.plugin, error code 2 (link edit error code 0, error number 0 ()) The only slightly strange thing I noticed is that when I use "file" on the content of the plugin I get: /Users/niko/hg/proj/drachma/src/build/Debug/drachma.app/Contents/ Resources/PyPlugin.plugin/Contents/MacOS/PyPlugin: Mach-O bundle i386 Which says "i386", but this is running on a PPC. I tried to use the "--prefer-ppc" option, but I get the same result either way. Any ideas on what's wrong, or where to find more information? It doesn't seem to matter whether I use -A mode or not. I am using a version of Python 2.4 from DarwinPorts; PyObjC was installed the same way. What's very odd is that all of this USED to work --- I had to do a bit of a hack to make the -A mode work, introducing a .pth file into ~/Library/Python/2.4/site-packages, but now nothing works, whether or not I add or remove that file. The only thing I can think of that I did in between is to attempt to build a "Release" version of the program instead of a "Debug" version, but now neither Release nor Debug works. thanks in advance for any clues, Niko

3 4