subprocess.check_call with stdin

Question

I would like to use

subprocess.check_call(cmd)

with the stdin argument. Most tutorials I've found so far will recommend using Popen directly (e.g., here), but I really need the exception if cmd errors out.

Any hint on how to get

import subprocess

subprocess.check_call('patch -p1 < test.patch')

to work properly?

score 3 · Answer 1 · answered May 11 '16 at 20:50

3

There is no need to run the shell, you could pass a file object as stdin:

with open('test.patch', 'rb', 0) as file:
    subprocess.check_call(['patch', '-p1'], stdin=file)

answered May 11 '16 at 20:50

jfs

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score 1 · Accepted Answer · answered May 11 '16 at 08:34

1

Easy:

subprocess.check_call('patch -p1 < test.patch', shell=True)

answered May 11 '16 at 08:34

John Zwinck

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subprocess.check_call with stdin

2 Answers2