🌐 Mailman 3 July 2005 - Pythonmac-SIG - python.org

PyObjC and ObjC threads
by Robert Brown July 20, 2005

July 20, 2005

I would like to write a multithreaded application, mostly to take advantage of dual processors... first, does Python's thread API do this? Last time I checked it would only run on one processor. I've written a thread class in ObjectiveC that works nicely. It uses Apple's distributed objects for communication. It can be called without problems from Python until one of the methods returns (oneway void) instead of just (void), which is sort of critical for useful threading. When one of the methods is (oneway void) Python crashes with a bus error. If the ObjC thread class is used by another ObjectiveC class (which itself has no oneway void functions) there's no problem, everything works great. This problem occurs even if the object is not running on a different thread, ie it's just a simple method call to a regular object except that the method returns oneway void. Any ideas why PyObjC hates (oneway void) functions so much? --------------------------------------------------- Robb Brown Seaman Family MR Research Centre Calgary, Alberta, Canada

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2.4.1 Installed and roughly working, but modules missing.
by Louis Pecora July 20, 2005

July 20, 2005

I installed Bob I.'s 2.4.1 version and I can get it up and running in Terminal using /usr/local/bin/python. But in running it from Terminal or BBEdit Python cannot find the module 'kinds'. At first it couldn't find the Numeric module, but I installed that and then the 'kinds' problem came up. Any ideas? I should mention that my Apple-supplied python appears hosed with several files missing deep down in the /system/library/framework/ .... blah, blah /versions/2.3/... etc. My hope is to get 2.4.1 up and running so I can continue working while I wrestle with finding and fixing hard drive problems. But I seem to need to replace modules like 'kinds' that got 'lost'. thanks for any info. -- Cheers, Lou Pecora Code 6362 Naval Research Lab Washington, DC 20375 USA Ph: +202-767-6002 email: pecora(a)anvil.nrl.navy.mil

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not "MacPython" - right place?
by William K July 20, 2005

July 20, 2005

I'm not sure if this is the place - browsing the list shows everyone talking about MacPython or building their own. I'm just interested in figuring out something on Apple's included Python. Major Python newbie here (a couple Python books in the mail). When I do an install with no options, it installs in /System/ Library/... That doesn't sound like a good idea - /System should be for Apple stuff and the occassional kext. Is there a standard user- plugin folder for Python on Mac OS X (like /Library/Python)? And how would I specify that in a python setup.py install command? The distutils documentation didn't help - developer-oriented. for Mac OS 10.4. I remember trying something back in Panther, but I didn't have the time or need to pursue it very far. I installed a module somehow in / Library/Python and it's still there. ----- William Kyngesburye <kyngchaos(a)kyngchaos.com> http://www.kyngchaos.com/ "I ache, therefore I am. Or in my case - I am, therefore I ache." - Marvin

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Python Eggs and Mac OS version compatibility
by Kevin Dangoor July 20, 2005

July 20, 2005

I have been packaging up some of my python packages in eggs: http://peak.telecommunity.com/DevCenter/PythonEggs Basically, an egg has everything you need to use a package, ready-to-run... including binary versions of extensions. It's a nice format because it enables people to just run an "easy_install" program to get a package, no compiler required. (Which is a bigger win on Windows, to be sure, but even on the Mac it means that casual scripters wouldn't need to install Developer Tools). The way eggs are created right now generates a package name that looks something like this: [PackageName]-[Version]-py[PythonVersion]-darwin-8.2.0-Power_Macintosh.egg As coded currently, updating from Mac OS 10.4.1 to 10.4.2 (which bumped the Darwin version from 8.1.0 to 8.2.0), means that any eggs compiled under 10.4.1 won't work any more under 10.4.2, because setuptools is checking the full platform to see if it matches. That's more than a little aggressive, compatibility-wise. We can redefine for Mac OS what an appropriate platform string would be and what the compatibility rules are. That's where I need some help, because I don't know for certain what the compatibility rules are. From reading this list for the past several months, I have an idea: 1) an extension built for Python 2.4 on 10.3 should work under 10.4 2) an extension built for Python 2.4 on 10.4 might work on 10.3, but don't count on it. Would it then make sense for setuptools to do something like this: - declare the platform as it does now (eg, darwin-8.2.0) - specify that an egg is compatible if it's major version (8) is <= your machine's major version. Are there other compatibility gotchas or would that do the trick? Kevin

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Re: [Pythonmac-SIG] NSMovieView question
by Jared Barden July 19, 2005

July 19, 2005

I appreciate all the QTMovieView help. Hopefully this will be the last question on the subject. In my app, I create a QTMovie with the initWithURL_error_() call. When I try to do a setMovie_() with the QTMovieView, I receive the following error: ValueError: NSInvalidArgumentException - *** -[OC_PythonArray quickTimeMovieController]: selector not recognized [self = 0x5247f90]. Any thoughts are appreciated. Jared Barden

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'import site' failed. Trouble starting python. What does this mean?
by Louis Pecora July 19, 2005

July 19, 2005

I've been having trouble running Python from BBEdit and the MacPython IDE (neither works) so I tried to start from the terminal. I get this message: louispec% python -v # installing zipimport hook import zipimport # builtin # installed zipimport hook 'import site' failed; traceback: ImportError: No module named site Python 2.3 (#1, Sep 13 2003, 00:49:11) [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> If I type "help", I get: >>> help Traceback (most recent call last): File "<stdin>", line 1, in ? NameError: name 'help' is not defined What's going on? Anyone know? Right now I'm Pythonless. Any info appreciated. Running on a G4 Al PB (1.25 GHz), OS X 10.3.8. Panther Add ons installed. WxPython installed. Matplotlib installed. Using Apple's Python AFAIK. -- Cheers, Lou Pecora Code 6362 Naval Research Lab Washington, DC 20375 USA Ph: +202-767-6002 email: pecora(a)anvil.nrl.navy.mil

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QuickTime, Mac/Modules/qt/qtsupport.py, and ComponentInstance
by Christopher K. Davis July 18, 2005

July 18, 2005

I'm trying to use the QuickTime support in 2.4.1, by way of Bob Ippolito's "official unofficial" framework build installer, on Mac OS X 10.4.2 (Tiger). However, in trying even the simplest of GraphicsImport manipulations, I hit a TypeError: from Carbon.Qt import * fn = "/tmp/testpic.jpg" ci = GetGraphicsImporterForFile(fn) pic = GraphicsImportGetAsPicture(ci) results in: Traceback (most recent call last): File "pyqt2.py", line 6, in ? pic = GraphicsImportGetAsPicture(ci) TypeError: Component required Looking at the documentation[1] for the routine, it expects a GraphicsImportComponent. Looking at the Component Types document[2], that's typedef'ed as a ComponentInstance. However, Mac/Modules/qt/qtsupport.py in 2.4.1 says: GraphicsImportComponent = OpaqueByValueType('GraphicsImportComponent', 'CmpObj') This defines it as a Component, rather than a ComponentInstance (CmpInstObj). Several other types have the same problem. [1] http://developer.apple.com/documentation/QuickTime/APIREF/graphicsimportget aspicture.htm [2] http://developer.apple.com/documentation/QuickTime/APIREF/ComponentTypes.htm

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Unicode Filenames on the Mac
by Nick Matsakis July 15, 2005

July 15, 2005

What is the best way to deal with non-ASCII paths when working with the python standard library? Specifically, when using functions like open() and the os and glob modules, what should be passed in? What should I expect out? In experimenting with it, it appears that these libraries accept str objects containing UTF-8 encoded bytes and similarly that is what they return. It would seem better to me if they could be made to accept and return unicode objects, but I could see that that might cause backwards compatibility problems. Still, is UTF-8 encoded strs really a safe bet? Are there circumstances, including non HFS filesystems, where it will bite me if I make this assumption? Nick

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py2app with vtk
by Arye HALIOUA July 15, 2005

July 15, 2005

Hello list, I am a new Mac user trying to use py2app so please bear with me. I use py2app version 0.2 on MacOS 10.3.9. When I feed py2app a python program of a simple wxpython GUI, all works just great! I can run the app, copy it into an other mac and run it as well. However when try to turn into an app, a python script that imports vtk modules and try to run it: * nothing happens on the Mac used to create the app * on a different Mac, into which I simply copied the app, I have an error message saying "cannot open library". It seems that the app is trying to fetch the libraries using the path into which they are installed on the Mac I used to create the app instead of from the bundle (in the Frameworks directory). Any expanation on what I am doing wrong would be greatly appreciated. I would grealy appreciate also any tips on how to turn an app into a proper Mac install program (with a dmg extension). Good day, Arye.

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appscript help - supposed to work?
by Nicholas Riley July 15, 2005

July 15, 2005

I just installed the appscript 0.13.0 and its multitude of dependencies, and tried to get docs on Preview's scripting support; I was rewarded with the following: >>> from appscript import * >>> p = app('Preview') >>> help(p) Traceback (most recent call last): File "<stdin>", line 1, in ? File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site.py", line 308, in __call__ return pydoc.help(*args, **kwds) File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/pydoc.py", line 1547, in __call__ self.help(request) File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/pydoc.py", line 1583, in help else: doc(request, 'Help on %s:') File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/pydoc.py", line 1368, in doc object, name = resolve(thing, forceload) File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/pydoc.py", line 1363, in resolve return thing, getattr(thing, '__name__', None) File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages/appscript/specifier.py", line 257, in __getattr__ raise RuntimeError, "Unknown property, element or command: %r" % name RuntimeError: Unknown property, element or command: '__name__' I seem to remember this used to work... I tried with a couple of other apps too; same problem. -- Nicholas Riley <njriley(a)uiuc.edu> | <http://www.uiuc.edu/ph/www/njriley>

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