[Pythonmac-SIG] uniformative Error when launching app

[Ronald Oussoren]

On 24 Sep, 2012, at 18:39, Geoffrey Irving <irving at naml.us> wrote:

> On Mon, Sep 24, 2012 at 12:21 AM, Ronald Oussoren
> <ronaldoussoren at mac.com> wrote:
>> 
>> On 21 Sep, 2012, at 21:36, Geoffrey Irving <irving at naml.us> wrote:
>> 
>>> I am trying to package up a mixed Python/C++ application using py2app.
>>> My setup.py is
>>> 
>>>   from setuptools import setup
>>>   setup(app=['voxpopuli.py'],data_files=[],options=
>>>     {'py2app'{'argv_emulation':True}},setup_requires=['py2app'])
>>> 
>>> and I invoke py2app via
>>> 
>>>   python setup.py py2app --no-strip --iconfile
>>> /Users/irving/otherlab/other/bin/OLicon.icns --resources
>>> /opt/local/lib/Resources/qt_menu.nib
>>> 
>>> This completes without warnings or errors, but when I try to run the
>>> resuling app a window pops up that simply says "voxpopuli Error". It
>>> has an "Open Console" button, but the only console messages are
>>> 
>>>   9/21/12 11:43:14.691 AM voxpopuli[52765]: voxpopuli Error
>>>   9/21/12 11:43:15.926 AM com.apple.launchd.peruser.501[158]:
>>> ([0x0-0x177d77c].org.pythonmac.unspecified.voxpopuli[52765]) Exited
>>> with code: 255
>>> 
>>> Are there standard ways to get more information out of py2app to help
>>> diagnosing this error?
>> 
>> You can run the application from the commandline as "voxpopuli.app/Contents/MacOS/voxpopuli" and that should print the script output to the terminal window.
> 
> When I do that the app runs fine with no errors or warnings.

That's annoying. You could try to redirect sys.stdout/sys.stderrr to see that provides more information. There is a __boot__.py file in the bundle that is loaded early during startup of the application, adding lines like these should redirect that output to a temporary file:

import sys
sys.stdout = open('/tmp/program.out', 'w')
sys.stderr = open('/tmp/program.err', 'w')

Ronald

> 
> Geoffrey

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