Return a value from shell script when it is called from a python script

Question

I have a shell script abc.sh which is called from a Python script custom_package.py using subprocess.call function call. I want to return a value from abc.sh and read it in Python.

Python call to shell script is as follows.

subprocess.call(['abc.sh', user, password])

abc.sh echos "running" or "not running". How can I capture "running" or "not running" in the Python script? Something like:

ret_val = subprocess.call(['abc.sh', user, password])

I have tried subprocess.check_output but it's not working.

ret_val = subprocess.check_output(['abc.sh', user, password])

Did you mistype "abc.sh" when you ran check_output()? That's what you're showing in your question. — Luke Yeager
– Luke Yeager, Commented Nov 12, 2014 at 0:09
there is no error ,just the return value is blank. I ran the shell script on terminal is producing output. — BigDataLearner
– BigDataLearner, Commented Nov 12, 2014 at 0:12
The code in the question is exactly how i have used check_output. — BigDataLearner
– BigDataLearner, Commented Nov 12, 2014 at 0:19

davidism · Accepted Answer · 2014-11-12 00:46:22Z

3

Use subprocess.check_output to capture the output of a subprocess. If the string 'not' is not in the returned value, the output was just 'running'.

output = subprocess.check_output(['abc.sh', user, password])
print(output)
running = 'not' not in output

edited Nov 12, 2014 at 0:46

answered Nov 12, 2014 at 0:08

davidism

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