Re: [Pyobjc-dev] Detecting Python interpreters on startup

[Just v. R. <ju...@le...>]

Dinu Gherman wrote:

> I got the following request, which makes me wonder how the one Python
> interpreter is located running PyObjC applications?
> 
>  > I was very impressed with the movie of reSTedit. As I use reST all
>  > the time, I down-loaded it, When I tried to run it on my Mac
>  > (10.2.6) by double-clickign the application, it started and then
>  > closed without any screen coming up. I normally run Python 2.3 via
>  > XDarwin (a Fink load) but I do have Python 2.2.1 in my
>  > Applications.
> 
> In my bin-python-main.py (which might not be the newest one) I found
> the following snippet:
> 
>      ## bin-python-main.py
> 
>      // figure out which python interpreter to use
>      NSString *pythonBinPath = [[NSUserDefaults standardUserDefaults] 
> stringForKey: @"PythonBinPath"];
>      pythonBinPath = pythonBinPath ? pythonBinPath :
@"/usr/bin/python";
> 
> Is this hardwiring /usr/bin/python as the one interpreter to use? Or
> has this been determined at "project instantiation time" using the
> Python-Cocoa Application template?
> 
> What is the general policy in chosing between possibly many installed
> Python interpreters and/or can this decission be delayed until the
> launch time of an application and how?

Apps built with bundlebuilder.py also hard-wire /usr/bin/python, but
only as the #! line of the bootstrap script. If someone _deletes_
/usr/bin/python, he/she has a broken system. People should simply not
touch /usr/bin, period.

Just