Exit shell script from python

Question

I Have a shell script which in turn runs a python script, I have to exit from the main shell script when an exception is caught in python. Can anyone suggest a way on how to achieve it.

Check the exit status after running your script (in bash that will be $?) — donkopotamus
– donkopotamus, Commented May 22, 2017 at 10:15
Is the exception caught (and handled) in Python, or does the Python script exit when the exception is raised? — unutbu
– unutbu, Commented May 22, 2017 at 10:30
python script is exited and the control returns to shell, I want the shell script to be terminated at that point of time. — Deepak
– Deepak, Commented May 22, 2017 at 10:33
Or set -e in the bash script, to immediately terminate if any of the commands it runs returns a non-zero exit status. It's a good safety tip for bash scripts — Simon Fraser
– Simon Fraser, Commented May 22, 2017 at 10:40

Duncan WP · Accepted Answer · 2017-05-22 11:03:16Z

2

In Python you can set the return value using sys.exit(). Typically when execution completed successfully you return 0, and if not then some non-zero number.

So something like this in your Python will work:

import sys

try:
    ....
except:
    sys.exit(1)

And then, as others have said, you need to make sure your bash script catches the error by either checking the return value explicitly (using e.g. $?) or using set -e.

answered May 22, 2017 at 11:03

Duncan WP

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