🌐 Mailman 3 July 2011 - Pythonmac-SIG - python.org

py2app under Lion--any issues?
by Russell E. Owen July 22, 2011

July 22, 2011

Will py2app to work to build Mac application bundles under Lion (MacOS X 10.7)? I'm using python.org 32-bit python and ActiveState Tcl/Tk 8.4.19 and trying to build self-contained Python/Tk apps that run on at least MacOS X 10.5 and later. I assume there's no problems, but it would be very helpful to know what to watch out for if there are. -- Russell

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error
by Alice Marcot July 21, 2011

July 21, 2011

When trying to use py2app according to the tutorial I am getting this error: *** creating application bundle: downloader *** error: /usr/local/lib/python2.7/dist-packages/py2app-0.6.3-py2.7.egg/py2app/apptemplate/prebuilt/main-i686: No such file or directory

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Python virtual environments on OS X
by Vinay Sajip July 20, 2011

July 20, 2011

I'm working on pythonv[1], a branch which aims to bring virtual environment creation functionality into Python itself (work on a PEP is in progress). I've got a prototype working quite well on Linux and Windows [2], but not yet done any work on OS X. The basic approach used is that the Python start up code (in getpath.c) looks at sys.executable and then for a configuration file env.cfg either in the executable's directory or one level up, and then for a line in env.cfg of the type home = /path/to/python If the file with that name and line are found, the home value sets sys.prefix and sys.exec_prefix, and then later on, code in site.py sets up the virtual environment. Because of the use of sys.executable, at present pythonv makes a copy of the executable (and, on Windows, all DLLs) in the environment's binaries folder. My question is, will this approach work on OS X? I can't readily build and test on an OS X system at the moment, so I'm hoping someone can enlighten me. If a python executable file has sys.prefix/sys.exec_prefix pointing to a framework build's location, will that give the virtual environment everything it needs to e.g. interface to Cocoa etc? Or does any other setup need to be done? Thanks and regards, Vinay Sajip [1] https://bitbucket.org/vinay.sajip/pythonv/ [2] http://www.red-dove.com/screencasts/pythonv/pythonv.html

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Progressbar in tkinter app
by Dan Ross July 16, 2011

July 16, 2011

I'm working on a tkinter gui for an app I made. I can't seem to get a progressbar to start and stop while a function runs. (pseduo-code) def my_function(): progress_bar.start() ##### do a bunch of stuff ##### progress_bar.stop() That should work shouldn't it? Or do I need a separate thread? Thanks all, Dan

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Converting python for CoreGraphics
by Jim Skibbie July 15, 2011

July 15, 2011

I have a python script that takes a PDF file and returns the width and height of the document's first page. When I moved this to Snow Leopard, I have to run this in 32-bit mode or I can an error: File "/BinaryCache/CoreGraphicsBindings/CoreGraphicsBindings-26~139/Root/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/CoreGraphics/__init__.py", line 7, in <module> ImportError: /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/CoreGraphics/_CoreGraphics.so: no appropriate 64-bit architecture Googling around, I find that CoreGraphics is no longer bound to python in Snow Leopard and that it will eventually need to be converted to PyObjC. Can anyone point me in a direction on where I might find some information on how to do this kind of porting? The existing script is below: # step 1: import the required modules import os, sys from CoreGraphics import * if len( sys.argv ) != 2: print "ERROR: useage: python example2.py pdf_filename" sys.exit(1) # step 2: read the pdf file name from the command line arguments pdf_filename = sys.argv[1] pdf_name, ext = os.path.splitext( pdf_filename ) # step 3: create the input PDF document provider = CGDataProviderCreateWithFilename( pdf_filename ) pdf = CGPDFDocumentCreateWithProvider( provider ) if pdf is None: print "ERROR reading PDF document - \r\n check that the supplied filename points to a PDF file" sys.exit(1) page_number = 1 #page_rect = pdf.getMediaBox( page_number ) page_rect = pdf.getPage(page_number).getBoxRect(page_number) page_width = float(page_rect.getWidth()) page_height = float(page_rect.getHeight()) print "%f\r\n%f" % (page_width, page_height) Thanks. Jim

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help
by Georges Arsouze July 15, 2011

July 15, 2011

Hi sorry for my poor english I'am working on mac os 10.6.1 with Python 3.1 I have wish 8.6 on my computer I want to use ttk widgets or tix widgets when i do import tkinter >>> tkinter._test() i obtain this is a tcl/tk version 8.4 on tk docs i see i must have a tcl/tk version 8.5 what can i do ? i try python 3.2 from activestate when i do import tkinter >>> tkinter._test() i obtain this is a tcl/tk version 8.5 but i have a trash with idle what can i do ? can you explain me step by step what i must do regards

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py2app: calling from Matlab and DYLD path problem
by Hamid M. July 6, 2011

July 6, 2011

Hello everyone I used py2app on a script that uses Qt and VTK libraries. For this to work, I had to edit __boot__.py within bundle to manually insert Contents/Resources/lib/python2.6/lib-dynload to 'sys' path, otherwise the application would complain that it couldn't find one of the .dyld files although it was in 'lib-dynload' folder! (I followed the tutorial and I didn't modify setup.py at all) I can now launch and use the application. However when I call this application from within Matlab using 'system' calls, it seems that the executable falls back on using the dynamic libraries that comes with Matlab rather than using the ones in bundle! So I tried to unset the DYLD_LIBRARY_PATH variable before calling my app in order to remove Matlab's library paths, and that didn't help. I have tried calling my application using both of these from Matlab command prompt: >> system('unset DYLD_LIBRARY_PATH; open -a /path/to/nirviz.app') and >> system('unset DYLD_LIBRARY_PATH; /path/to/nirviz.app/Contents/MacOS/nirviz') I was wondering if you guys could help me with this, any hint is appreciated. thanks in advance, Hamid G

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