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

Apparently a cStringIO.StringIO object doesn't quack close enough to a file duck to suit subprocess.Popen

I'm afraid not. The pipe is a low-level OS concept, so it absolutely requires a file object that is represented by an OS-level file descriptor. Your workaround is the right one.