call subprocess python with no spaces

Question

Considering one variable "outdir", included in the command line to create a directory where I will deposit my outputs, what is the best option to call a subprocess that only accept the parameters like "-o=both" and do not permit spaces between the parameter (-d=) and the value (outdir)?

'-o=both','-m=both' and '-t=4' can be established before and I have it already included in my script.

This is the line that I used:

subprocess.call(['external_script.pl', '-d=',outdir,'-o=both','-m=both','-t=4'])

I am a little bit confused what you are asking. You could avoid the spaces by passing outdir.strip() or check with a if statement before subprocess if there are spaces at the start of outdir? — alexblae
– alexblae, Commented Dec 13, 2017 at 8:32

Borian · Accepted Answer · 2017-12-13 08:41:20Z

1

why not just putting your parameter as you need:

['external_script.pl', '-d=%s' % outdir,'-o=both','-m=both','-t=4']

answered Dec 13, 2017 at 8:41

Borian

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F.Lira · Accepted Answer · 2017-12-13 10:38:02Z

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I changed the ',' for a '+' in the line and it worked.

subprocess.call(['external_script.pl', '-d='+outdir,'-o=both','-m=both','-t=4'])

answered Dec 13, 2017 at 10:38

F.Lira

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