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

Re: [Pythonmac-SIG] Setting the Screen Saver
by has July 18, 2006

July 18, 2006

Simon Brunning wrote: > Is there a way of setting the OS X screen saver using Python? > > The System Preferences ap looks like it's AppleScript (and hence > appscript) drivable, but I can't work out how to make it actually > change any settings. System Preferences' scripting support is rudimentary. You can switch between preference panes, but that's about it. Anything more, you'll need to use GUI Scripting (with the usual caveats about brittleness, etc). has -- http://freespace.virgin.net/hamish.sanderson/

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Setting the Screen Saver
by Simon Brunning July 18, 2006

July 18, 2006

Is there a way of setting the OS X screen saver using Python? The System Preferences ap looks like it's AppleScript (and hence appscript) drivable, but I can't work out how to make it actually change any settings. I've also found the screen saver plist, but it's binary rather than XML, so I'd rather not go there if I can avoind it. Besides, I don't know if changing the plisty would take immediate effect. Any hints? -- Cheers, Simon B, simon(a)brunningonline.net, http://www.brunningonline.net/simon/blog/

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Psycopg2 package fails on Intel Mac
by jacobian.33809303＠bloglines.com July 18, 2006

July 18, 2006

Howdy folks -- It appears that the psycopg2 package at pythonmac.org/packages doesn't work on (my) MacIntel: jacob@dorkbook:~$ python Python 2.4.3 (#1, Apr 7 2006, 10:54:33) [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import psycopg2 Traceback (most recent call last): File "<stdin>", line 1, in ? File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/psycopg2/__init__.py", line 60, in ? from _psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID ImportError: Failure linking new module: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/psycopg2/_psycopg.so: Symbol not found: _krb5_free_principal Referenced from: /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/psycopg2/_psycopg.so Expected in: dynamic lookup The universal packages page on the wiki makes it seem as if I should expect this package not to work, but I'm not sure if that's up-to-date. Am I doing something wrong, or is this breakage expected? Also: if someone can point me towards what's been done on psycopg2 so far I'd happily spend some time hacking on building it from source. I've given it about 10 minutes and not gotten anywhere, but as long as I'm not duplicating effort I'll keep poking. Thanks! Jacob

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Packaging numpy with py2app
by Josh Marshall July 17, 2006

July 17, 2006

Back in December last year, I was building a PyObjC application that embedded numpy (scipy_core at the time), scipy and matplotlib. I ran into a few issues doing so, some of which were resolved. One was the inability for scipy to run from a zipped site-packages. I worked around this by expanding the embedded site-packages.zip into a site- packages directory in the same location. For reference, the thread can be found at: http://www.scipy.net/pipermail/scipy-dev/2005-December/004551.html Come a few months later, I have needed to update to the latest version of numpy (and therefore scipy and matplotlib). I have not yet updated to the universal build of Python, still running 2.4.1, although I will do so if it is known to fix any issues. (I don't have too much time at the moment, and building the latest versions of numpy and matplotlib for a universal build scares me). I managed to get it working again, which required: 1) Setting packages=['matplotlib','numpy'] in setup.py's options for py2app. 2) Modifying the py2app/apptemplate/lib/site.py file to include 'sys.path.append(_parent + '/site-packages')' before the same line with .zip appended to the file name. 3) Adding setup_options['options']['py2app']['includes'].extend (['pytz.zoneinfo.UTC']) to the setup.py, this is required by matplotlib. I believe (2) is a bug in py2app (I am running 0.3.1). Packages included using 'packages=' are not added to site-packages.zip, but rather are in their own site-packages directory. I am not sure whether this is the intended behaviour or a bug, but it is good for me, since numpy and matplotlib won't run when compressed. Now, it seems I am doomed to continue to have to find work-arounds to get numpy and matplotlib working in a standalone .app. Is there a chance we can come up with a py2app recipe for numpy, matplotlib and scipy? What other alternatives are there? Regards, Josh

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how big is fat?
by Charles Hartman July 17, 2006

July 17, 2006

I have an app from a year ago that needed one tweak. When I build it on a PowerBook G4 with Python 2.4.1 (Mar 23 2005 build) and wxPython 2.6.3.0, using --strip in the 'python setup.py py2app' command, I get an executable of 16Mb. (For some reason I don't understand, this is already 5Mb bigger than the executable I built a few months ago.) When I build it on an Intel iMac with Python 2.4.3 (Apr 7 2006 buld) and wxPython 2.6.3.2rc1, the app is fifty megabytes. Two really simple questions: 1. Get Info says the executable built on the Intel Mac, with Universal versions of Python and wxPython, is an "Application (PowerPC)" -- why doesn't it say "Application (Universal)"? 2. What's behind the bloat? Is it simply that it is a Universal app, though Get Info doesn't recognize it as that? And is there anything to be done about it? Charles Hartman

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Memory errors implementing an NSCell to show colors in an NSTableView
by Josh Marshall July 17, 2006

July 17, 2006

I have been trying to get an application using PyObjC to display colors in an NSTableView. In my searching around, it seems the consensus is "NSColorWell isn't an NSCell, create your own subclass of NSCell which just shows the color." So, with no further information, I tried this with an NSCell subclass: class MyColorCell(NSCell): currentColor = objc.ivar('currentColor') def setObjectValue_(self, objectValue): self.currentColor = objectValue def drawInteriorWithFrame_inView_(self, cellFrame, controlView): if self.currentColor is not None: self.currentColor.drawSwatchInRect_(cellFrame) and in my app delegate I have: class ColorCellExampleAppDelegate(NibClassBuilder.AutoBaseClass): colors = objc.ivar('colors') # array containing created model objects colorArrayController = objc.ivar('colorArrayController') # bound so we can use addObject_() newColorWell = objc.ivar('newColorWell') colorTableColumn = objc.ivar('colorTableColumn') # use to set the data cell. def applicationDidFinishLaunching_(self, notification): self.colorCell = MyColorCell.alloc().init() self.colorTableColumn.setDataCell_(self.colorCell) def addNewColor_(self, sender): # bound to add button newColor = MyModelColorValue.alloc().initWithColor_ (self.newColorWell.color()) self.colorArrayController.addObject_(newColor) The model object definition is: class MyModelColorValue(NSObject): color = objc.ivar('color') def initWithColor_(self, color): self.color = color.copy() return self The problem comes once I try to click on the colors in the list, the program just barfs. It looks like an object is getting freed where it shouldn't. I'm getting either objc: FREED(id): message isKindOfClass: sent to freed object=0x11cd510 or just a plain "Bus error" before it dies. Looking at the stack trace, the first few lines are: 0 <<00000000>> 0xfffeff18 objc_msgSend_rtp + 24 1 com.apple.AppKit 0x93905594 -[NSValueBinder displayValueForObjectValue:] + 204 2 com.apple.AppKit 0x93904b7c -[NSValueBinder _adjustObject:mode:observedController:observedKeyPath:context:editableSt ate:adjustState:] + 968 3 com.apple.AppKit 0x9392fd04 -[NSValueBinder updateTableColumnDataCell:forDisplayAtIndex:] + 140 4 com.apple.AppKit 0x939304d0 -[NSTextValueBinder updateTableColumnDataCell:forDisplayAtIndex:] + 88 5 com.apple.AppKit 0x9392fc5c -[_NSBindingAdaptor tableColumn:willDisplayCell:row:] + 108 6 com.apple.AppKit 0x9378d7c4 -[NSTableView _sendDelegateWillDisplayCell:forColumn:row:] + 88 7 com.apple.AppKit 0x9378d204 -[NSTableView _drawContentsAtRow:column:clipRect:] + 396 8 com.apple.AppKit 0x9378cbf8 -[NSTableView drawRow:clipRect:] + 220 I have a sample project demonstrating the error, but I can't attach it for some reason, so if you want it, email me.. I would appreciate it if someone can tell what is going on, or can point me towards getting started in debugging memory errors in PyObjC. Thanks, Josh

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matplotlib fat binary
by Charlie Moad July 17, 2006

July 17, 2006

Could you please update the py24-fat listing with the latest matplotlib build? https://sourceforge.net/project/showfiles.php?group_id=80706&package_id=824… Thanks, Charlie

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Re: [Pythonmac-SIG] Installing NumPy
by LALOUX Martin July 17, 2006

July 17, 2006

why not try ? http://www.scipy.org/Installing_SciPy/Mac_OS_X?highlight=%28%28----%28-%2A%…

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detecting mounted disks
by Henning Hraban Ramm July 16, 2006

July 16, 2006

How can I detect if an entry in MacOSX's /Volumes (or more generally: any mount point in a UNIX-like OS) is... - a local harddisk - a network volume - a CD/DVD-ROM - something other (USB stick...) ? I guess I could get some info from 'mount', but isn't there already a Python function? o.path's ismount and isdir aren't enough. Greetlings from Lake Constance! Hraban --- http://www.fiee.net http://www.cacert.org (I'm an assurer)

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Installing NumPy
by Joel.Levine＠Dartmouth.EDU July 16, 2006

July 16, 2006

I am trying to get up and running under Mac10.4 with the Intel chip. My old code runs on my 10.3 machine. On this machine, it can not find Numeric. That's reasonable: It isn't there. If I copy the contents of my old Numeric folder to a proper location, Python simply dies when I try to import. It will be obvious that I'm not experienced with Unix: I'm guessing that the old folder contained compiled code that doesn't belong on that machine. So -- I downloaded NumPy. I've put it in a folder of its own, for safety. The instructions tell me to install with the command: python setup.py install But I'm running into a permission problem. I get error: could not create 'build': Permission denied Any suggestion?

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