How do I pass a string into subprocess.Popen (using the stdin argument)?

Question

If I do the following:

import subprocess
from cStringIO import StringIO
subprocess.Popen([\'grep\',\'f\'],stdout=subprocess.PIPE,stdin=StringIO(\'one\\ntwo\\         


        

Answer 1

from subprocess import Popen, PIPE
from tempfile import SpooledTemporaryFile as tempfile
f = tempfile()
f.write('one\ntwo\nthree\nfour\nfive\nsix\n')
f.seek(0)
print Popen(['/bin/grep','f'],stdout=PIPE,stdin=f).stdout.read()
f.close()