New submission from Nick <[email protected]>:
If subprocess.run is called with a single string, say:
completed_ps = subprocess.run('mpirun -np 4 myexe.x moreargs', shell=True)
and 'myexe.x moreargs' fails with a returncode of 1, then
'completed_ps.returncode' is None. However, if we split the args with shlex, we
obtain the desired result, which is a returncode of 1:
import shlex
args = shlex.split('mpirun -np 4 myexe.x moreargs')
completed_ps = subprocess.run(args)
# now completed_ps.returncode = 1 if myexe.x moreargs fails.
Reproduced on Mac, Ubuntu 17.04, Python 3.6.1 and Python 3.6.3.
----------
messages: 305094
nosy: nthompson
priority: normal
severity: normal
status: open
title: subprocess.returncode not set depending on arguments to subprocess.run
versions: Python 3.6
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Python tracker <[email protected]>
<https://bugs.python.org/issue31881>
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