Python subprocess and shell input redirection

Question

On the unix command line, I can do:

paste <(echo A) <(echo B)

However, when I try to do this:

import subprocess
subprocess.call('paste <(echo A) <(echo B)', shell = True)

I am getting this error:

/bin/sh: -c: line 0: syntax error near unexpected token `('
/bin/sh: -c: line 0: `paste <(echo A) <(echo B)'

Unable to redirect shell input using subprocess module?

+3

tommy.carstensen Sep 18 14 at 11:21

1 answer

Etan reisner · Accepted Answer · 2014-09-18T12:59:36+0000

Many things are used by default /bin/sh

as a wrapper around the selection. /bin/sh

often not bash.

/bin/sh

your system most likely does not support process substitution.

Specify subprocess.call

use /bin/bash

instead of shell and work.