subprocess problem

[Cameron Simpson]

On 10Feb2017 11:54, Andreas Paeffgen <oegeeks at gmail.com> wrote:
>Thanks for all the great advice.
>I tested all the possibilities. So far no luck. If i start the app 
>from a terminal, the solutions work. But not, if i start the 
>app-bundle (There is no connection to a terminal)
>
>1. Copied the path to p.subprocess
>2. Used the def wich: python function
>3. Used shutil
>
>When there is no Terminal, there is no error message / status code message.

Please show us you code containing the status code check.

I would do some debugging inside the function. Consider writing to a special 
purpose log file, for example like this:

  def your_function(.......):
    with open('/path/to/your/logfile.txt', 'a') as logfp:
      print("PATH=".os.environ['PATH'], file=logfp)
      p=Popen(.......)
      p.communicate(...)
      print("p.returncode=%r" % (p.returncode))

and any other interesting values that occur to you. This is really simple, and 
doesn't require a terminal or using the logging module.

You can 'tail -f /path/to/your/logfile.txt' in another terminal to watch stuff 
happen as you exercise the program.

Cheers,
Cameron Simpson <cs at zip.com.au>