Execute bash function in a script and get return

Question

i want to execute bash function in a script and i want to print the return function.

this is my current code

function myfunct() { 
    return 1
}

and my python code:

process = subprocess.Popen(['bash', '-c', '. myscript.sh; myfunct'])
output, error = process.communicate()
print(output)

i have "None" output, i want 1 output

Konrad Rudolph · Accepted Answer · 2020-09-14 14:54:55Z

2

The return value of a script isn’t streamed to a standard stream. It sets an exit code, which you can query via process.returncode.

Since you aren’t actually reading the script’s standard streams, don’t use Popen/communicate — use run instead:

process = subprocess.run(['bash', '-c', '. myscript.sh; myfunct'])
result = process.returncode

answered Sep 14, 2020 at 14:54

Konrad Rudolph

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