[Pythonmac-SIG] py2app and command line options

[Tobias Rodäbel]

Hi Chris,

On 30.01.2008, at 00:33, Christopher Barker wrote:

> Hey all,
>
> I've got a py2app bundle working nicely, and it works fine when I fire
> ti up from the command line, but when I double click on it, I get a
> sys.argv that looks like:
>
> sys.argv is:
> ['/Users/cbarker/HAZMAT/hazweb/trunk/cameo/StandAlone/dist/ 
> cameo_standalone.app/Contents/Resources/cameo_standalone.py',
> '-psn_0_21364737']
>
> Where is that "-psn_0_21364737"
>
> coming from, and how to I get rid of it?


The -psn argument is a bit of an historical leftover. It stands for  
carbon process serial number. Every time you start an application from  
within the finder/desktop by double clicking it, this option will be  
attached automatically as the first command line option (sys.argv[1])  
after the script name. Set argv_emulation=True (in your setup.py in  
OPTIONS) or delete it within your application (__main__):

if len(sys.argv) > 1: del sys.argv[1]

Here is a little sample setup:

setup.py file:

from setuptools import setup

OPTIONS = {'argv_emulation': False}

setup(
     app=['foo.py'],
     description="A foo.",
     options={'py2app': OPTIONS},
     setup_requires=['py2app'],
)


foo.py file in same directory:

import sys

if "__main__" == __name__:
     if len(sys.argv) > 1: del sys.argv[1]
     print sys.argv



Greetings,
Tobias