🌐 Mailman 3 October 2007 - Pythonmac-SIG - python.org

Python control/integration of a Cocoa/Quicktime application?
by Darran Edmundson Oct. 26, 2007

Oct. 26, 2007

I have a couple of Cocoa/Quicktime developers working on a small custom application. These guys are very capable at OS X programming but don't have any python experience. I, on the other hand, have a lot of python experience but virtually no Mac development experience. I could really do with some advice from someone able to see "the big picture". A bit of background ... We are working on a museum exhibit where a large 65" 1920x1080 screen attached to a Mac Pro is electronically positioned on a 4m industrial slide-track via a physical interface device. Each millimeter of track corresponds to a different image in a 4000 frame photo-jpeg-encoded Quicktime. The user tweaks the interface device, the screen moves, the image changes appropriately - that's the basic plan. I have a python program on the Mac that determines, among other things, the screen location. The OS X developers are going to write a full-screen Cocoa application that handles the display side of things (along with some tricks like: change to a new movie; tweak the opacity; add a second layer movie; etc.) The question then: how to join these two codes? Options (that I can think of, probably more worthy of discussion): 1) Get the Mac guys to write their application as a library that can be wrapped in pyObjC and invoked by my python program. In this scenario, the result is only one process/program with no network issues. 2) Add networking code to both the python and cocoa apps in order to communicate (binary socket, XML over http, Bonjour, etc.). Easy in python via Twisted, no doubt less so in cocoa. As always, any advice is much appreciated. Cheers, Darran. -- Darran Edmundson [darran(a)edmstudio.com] http://www.edmstudio.com

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How does py2app decide what to use as a sys.path?
by Richard Bronosky Oct. 24, 2007

Oct. 24, 2007

I can't figure out how to get py2app to include the site-package dir where my wx is located. Here is a transcript of a simple test I ran. Please advise. /tmp$ cat py2app-test.py #!/usr/bin/env python import sys; print "Python Version:", sys.version print "Python Path:", sys.path import wx /tmp$ ./py2app-test.py Python Version: 2.4.4 (#1, Aug 18 2007, 11:05:26) [GCC 4.0.1 (Apple Computer, Inc. build 5367)] Python Path: ['/private/tmp', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/geopy-0.93-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/UNKNOWN-0.0.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/configobj-4.4.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/py2app-0.3.6-py2.4.egg', '/Users/rbronosky/Code/python/site-packages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python24.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-darwin', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac/lib-scriptpackages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-tk', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-dynload', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages', '/opt/local/lib/python2.4/site-packages', '/opt/local/lib/python2.4/site-packages/Numeric', '/opt/local/lib/python2.4/site-packages/PyObjC', '/opt/local/lib/python2.4/site-packages/wx-2.8-mac-unicode'] /tmp$ py2applet -A ./py2app-test.py running py2app creating /private/tmp/tmp0GHZAP/build creating /private/tmp/tmp0GHZAP/build/bdist.macosx-10.3-i386 creating /private/tmp/tmp0GHZAP/build/bdist.macosx-10.3-i386/python2.4-standalone creating /private/tmp/tmp0GHZAP/build/bdist.macosx-10.3-i386/python2.4-standalone/app creating /private/tmp/tmp0GHZAP/build/bdist.macosx-10.3-i386/python2.4-standalone/app/collect creating /private/tmp/tmp0GHZAP/build/bdist.macosx-10.3-i386/python2.4-standalone/app/temp creating /private/tmp/tmp0GHZAP/dist creating build/bdist.macosx-10.3-i386/python2.4-standalone/app/lib-dynload creating build/bdist.macosx-10.3-i386/python2.4-standalone/app/Frameworks *** creating application bundle: py2app-test *** creating /private/tmp/py2app-test.app creating /private/tmp/py2app-test.app/Contents copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/Info.plist -> /private/tmp/py2app-test.app/Contents creating /private/tmp/py2app-test.app/Contents/MacOS copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/MacOS/py2app-test -> /private/tmp/py2app-test.app/Contents/MacOS linking /private/tmp/py2app-test.app/Contents/MacOS/python -> /opt/local/Library/Frameworks/Python.framework/Versions/2.4/Resources/Python.app/Contents/MacOS/Python copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/PkgInfo -> /private/tmp/py2app-test.app/Contents creating /private/tmp/py2app-test.app/Contents/Resources copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/Resources/__boot__.py -> /private/tmp/py2app-test.app/Contents/Resources copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/Resources/__error__.sh -> /private/tmp/py2app-test.app/Contents/Resources creating /private/tmp/py2app-test.app/Contents/Resources/lib creating /private/tmp/py2app-test.app/Contents/Resources/lib/python2.4 linking /private/tmp/py2app-test.app/Contents/Resources/lib/python2.4/config -> /opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/config linking /private/tmp/py2app-test.app/Contents/Resources/lib/python2.4/site.py -> ../../site.py linking /private/tmp/py2app-test.app/Contents/Resources/PythonApplet.icns -> /opt/local/Library/Frameworks/Python.framework/Versions/2.4/Resources/Python.app/Contents/Resources/PythonApplet.icns copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/Resources/site.py -> /private/tmp/py2app-test.app/Contents/Resources copying /private/tmp/tmp0GHZAP/dist/py2app-test.app/Contents/Resources/site.pyc -> /private/tmp/py2app-test.app/Contents/Resources /tmp$ tail -n 0 -f /Library/Logs/Console/$(id -u)/console.log & open py2app-test.app [1] 14464 /tmp$ Python Version: 2.4.4 (#1, Aug 18 2007, 11:05:26) [GCC 4.0.1 (Apple Computer, Inc. build 5367)] Python Path: ['/private/tmp', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/geopy-0.93-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/UNKNOWN-0.0.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/configobj-4.4.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/py2app-0.3.6-py2.4.egg', '/private/tmp/py2app-test.app/Contents/Resources', '/tmp/py2app-test.app/Contents/Resources', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python24.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-darwin', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac/lib-scriptpackages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-tk', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-dynload', '/tmp/py2app-test.app/Contents/Resources/lib/python2.4/site-packages.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages', '/Users/rbronosky/Library/Python/2.4/site-packages', '/private/tmp'] Traceback (most recent call last): File "/tmp/py2app-test.app/Contents/Resources/__boot__.py", line 157, in ? _run(('\x00\x00\x00\x00\x01\x16\x00\x02\x00\x00\x0cMacintosh HD\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc2\xca\xa1qH+\x00\x00\x00(\xfc\xef\x0epy2app-test.py\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00)v\x89\xc3D\xd9M\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00I \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x08\x00\x00\xc2\xca\xd9\xb1\x00\x00\x00\x11\x00\x08\x00\x00\xc3E\x11\x8d\x00\x00\x00\x0e\x00\x1e\x00\x0e\x00p\x00y\x002\x00a\x00p\x00p\x00-\x00t\x00e\x00s\x00t\x00.\x00p\x00y\x00\x0f\x00\x1a\x00\x0c\x00M\x00a\x00c\x00i\x00n\x00t\x00o\x00s\x00h\x00 \x00H\x00D\x00\x12\x00\x1aprivate/tmp/py2app-test.py\x00\x13\x00\x01/\x00\xff\xff\x00\x00', '/private/tmp/py2app-test.py')) File "/tmp/py2app-test.app/Contents/Resources/__boot__.py", line 153, in _run execfile(path, globals(), globals()) File "/private/tmp/py2app-test.py", line 7, in ? import wx ImportError: No module named wx 2007-10-24 11:23:57.724 py2app-test[14467] py2app-test Error 2007-10-24 11:23:57.725 py2app-test[14467] py2app-test Error An unexpected error has occurred during execution of the main script ImportError: No module named wx /tmp$ kill %1 [1]+ Terminated tail -n 0 -f /Library/Logs/Console/$(id -u)/console.log /tmp$ And for the sake of clarity: --- dot_py_sys_path 2007-10-24 11:51:41.000000000 -0400 +++ dot_app_sys_path 2007-10-24 11:51:57.000000000 -0400 @@ -4,7 +4,8 @@ '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/UNKNOWN-0.0.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/configobj-4.4.0-py2.4.egg', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/py2app-0.3.6-py2.4.egg', - '/Users/rbronosky/Code/python/site-packages', + '/private/tmp/py2app-test.app/Contents/Resources', + '/tmp/py2app-test.app/Contents/Resources', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python24.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-darwin', @@ -12,9 +13,8 @@ '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac/lib-scriptpackages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-tk', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/lib-dynload', + '/tmp/py2app-test.app/Contents/Resources/lib/python2.4/site-packages.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages', - '/opt/local/lib/python2.4/site-packages', - '/opt/local/lib/python2.4/site-packages/Numeric', - '/opt/local/lib/python2.4/site-packages/PyObjC', - '/opt/local/lib/python2.4/site-packages/wx-2.8-mac-unicode' + '/Users/rbronosky/Library/Python/2.4/site-packages', + '/private/tmp' ]

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Anyone having luck py2app on wxPython (wxGlade)?
by Richard Bronosky Oct. 24, 2007

Oct. 24, 2007

I've been trying to package up the wxGlade app with py2app, and have had no luck. I've tried lots of different things with no luck. py2app was giving me macholib errors (from strip) trying to install py2app from source complained of not finding site-packages/site.py ideas? -- .!# RichardBronosky #!.

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_imagingft for PIL
by Scott Frankel Oct. 24, 2007

Oct. 24, 2007

Pardon the cross-post. Would anyone on this list happen to know the appropriate way to build and install _imagingft for use with PIL? My Google searches have found references to it, source code, complaints, and disclaimers; but I have not found the info I need to build & install it. I would like to render fonts. Thanks in advance! Scott MacOSX v10.4.9 Python v2.4.1 PIL v1.1.6

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ctypes and OS X CF types?
by Bill Janssen Oct. 23, 2007

Oct. 23, 2007

I'm trying to call the Spotlight system from Python, and I thought I'd try using the ctypes support in Python 2.5 to use the MDQuery framework. However, it seems that I'll have to unearth and write ctypes definitions for a number of Core Foundation C++ types, in order to do that. Has anyone already done this? Created ctypes definitions for the standard CF types, and made them available somewhere? Thanks. Bill

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setuptools/distutils/py2app bug?
by has Oct. 23, 2007

Oct. 23, 2007

Hi folks, Getting the following error when using py2app to build ASDictionary: mb:~/appscript/ASDictionary/src has$ python setup.py py2app Traceback (most recent call last): File "setup.py", line 46, in <module> iconfile='ASDictionary.icns' File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ python2.5/distutils/core.py", line 112, in setup _setup_distribution = dist = klass(attrs) File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ python2.5/site-packages/setuptools-0.6c7-py2.5.egg/setuptools/ dist.py", line 223, in __init__ File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ python2.5/distutils/dist.py", line 239, in __init__ for (opt, val) in cmd_options.items(): AttributeError: 'list' object has no attribute 'items' Freshly installed Python 2.5 on MBP. Relevant packages straight off PyPI: altgraph-0.6.7-py2.5.egg bdist_mpkg-0.4.3-py2.5.egg macholib-1.1-py2.5.egg modulegraph-0.7-py2.5.egg py2app-0.3.6-py2.5.egg setuptools-0.6c7-py2.5.egg Any ideas? Thanks, has -- http://appscript.sourceforge.net http://rb-appscript.rubyforge.org

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Re: [Pythonmac-SIG] ctypes and OS X CF types?
by Dethe Elza Oct. 22, 2007

Oct. 22, 2007

On 10/22/07, Bill Janssen <janssen(a)parc.com> wrote: > > CoreFoundation is C, not C++. That said, it'd probably be easier to > > use PyObjC with NSMetadataQuery instead. > > Unfortunately, the Objective-C API is not as functional. Another option is to write the C wrapper in Objective-C (or find a third-party framework that already offers the functionality you want), then write a wrapper to expose it to Python using PyObjC. I've had success with this for using Quicktime features not exposed by Cocoa (I found a third-party library) and the Python wrapper is about three lines of boilerplate code, if I recall correctly. For cross-platform stuff, ctypes is probably the way to go. But if you're targeting OS X anyway, the PyObjC approach has worked well for me. --Dethe

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Re: [Pythonmac-SIG] Python on Mac Book
by has Oct. 22, 2007

Oct. 22, 2007

Ronald Oussoren wrote: >> Is there a good book out there on programming python on mac ? > > No. There are a number of good books on Python programming in > general and those should get you going on the Python side. For the > most part Python on the mac is just like Python on other unixy > platforms. Also various online tutorials, if the OP's completely new to Python. Easy enough to find. > I know of no books that deal with mac-specific issues (like > applescript and Cocoa) from the Python perspective, but that > shouldn't be a problem unless you want to use mac-specific > technologies. W.r.t. applescript: appscript is very useful and has > good documentation. Yep, appscript is quite straightforward to use once you appreciate how it works. (It's basically a hybrid RPC+query-based system, not an object-oriented connected a-la COM or CORBA, and any syntax on top of that is just sugar to sweeten the taste.) The hard bit is dealing with the various bugs, quirks and inadequate documentation of the applications you want to script, but that's not something specific to appscript. Dealing with this tends to be a bit hand-to-mouth, involving a fair degree of intelligent guesswork, trial-and-error testing, studying existing scripts and generally looking and asking around for help. However, there's various folks here and in the AppleScript community who can provide advice on specific problems (and several mailing list and BBS archives you can search for past discussions) so don't be afraid to ask. > W.r.t. Cocoa: PyObjC does not have extensive documentation, but it > should be easy enough learn just enough Objective-C to learn about > Cocoa from the myriad of Objective-C Cocoa books. FWIW, this is how I did it: one copy of PyObjC (for obvious reasons), one copy of AppKiDo (for quickly looking up Cocoa API documentation), one copy of Hillegass (to grok the basic concepts behind Cocoa programming), one Google bookmark (for everything else), and just dived in and began writing code till it started to all make sense. The example code included with PyObjC is really handy for picking through and pulling apart to help understand the general principles and as a source of example solutions to various common design requirements. And again, there are plenty of folks here and in the wider Cocoa community (e.g. I also subscribe to Omni's MacOSX-dev and Apple's Cocoa-dev mailing lists) who you can ask for advice when you need it. HTH has -- http://appscript.sourceforge.net http://rb-appscript.rubyforge.org

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Re: [Pythonmac-SIG] ctypes and OS X CF types?
by Daniel Miller Oct. 22, 2007

Oct. 22, 2007

Please ignore my previous email. I hope it didn't come across as condescending. Really, I was only trying to help. Unfortunately, I had not read your question thoroughly enough. Bill Janssen wrote: > I'm trying to call the Spotlight system from Python, and I thought I'd > try using the ctypes support in Python 2.5 to use the MDQuery > framework. However, it seems that I'll have to unearth and write > ctypes definitions for a number of Core Foundation C++ types, in order > to do that. Has anyone already done this? Created ctypes definitions > for the standard CF types, and made them available somewhere? Are you asking about struct definitions and such? For example: from ctypes import Structure, c_float, c_double class PMRect(Structure): _fields_ = [ ("top", c_double), ("left", c_double), ("bottom", c_double), ("right", c_double), ] class CGPoint(Structure): _fields_ = [("x", c_float), ("y", c_float)] class CGSize(Structure): _fields_ = [("width", c_float), ("height", c_float)] class CGRect(Structure): _fields_ = [("origin", CGPoint), ("size", CGSize)] Those are the only ones I've used, and luckily they're pretty simple. I do not know of a library of definitions for standard CF types. Sorry. ~ Daniel

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Re: [Pythonmac-SIG] ctypes and OS X CF types?
by Daniel Miller Oct. 22, 2007

Oct. 22, 2007

AFAIK you don't need to do anything special (i.e. write "ctypes definitions") to call the CF functions with ctypes. Just call them. Here's a snippet of code that I use to open a PDF document and get the number of pages: from ctypes import cdll, byref, c_void_p, c_int, c_uint, c_float, c_double from ctypes.util import find_library cf = cdll.LoadLibrary(find_library("ApplicatonServices")) filename = "/path/to/document.pdf" kCFAllocatorDefault = None kCFURLPOSIXPathStyle = 0 # open pdf document fileref = None fileurl = None try: fileref = cf.CFStringCreateWithCString(None, filename, 0) fileurl = cf.CFURLCreateWithFileSystemPath( kCFAllocatorDefault, fileref, kCFURLPOSIXPathStyle, 0 ) pdf = cf.CGPDFDocumentCreateWithURL(fileurl) if not pdf: raise PrintError("cannot open PDF document: %s" % filename) finally: if fileurl: cf.CFRelease(fileurl) if fileref: cf.CFRelease(fileref) numpages = cf.CGPDFDocumentGetNumberOfPages(pdf) if pdf: cf.CGPDFDocumentRelease(pdf) My experience with developing code like this is that it takes a lot of patience and trial and error to get it stable. Remember that you're dealing with C functions and pointers (it's called ctypes for a reason), which are not nearly as forgiving as normal Python functions and objects. For example, calling a C function with the wrong argument types will generally cause a cold hard segfault rather than give you a nice stack trace with some indication of what caused the error. When all else fails read the documentation for the library you're calling...again. ~ Daniel

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