SaltyCrane Blog

Notes on Python, Django, and web development on Ubuntu Linux

How to capture stdout in real-time with Python

Date: 2009-10-12 | Tags: notestoself, processes, python | 1 Comment

This solution is thanks to this article.

import subprocess

def myrun(cmd):
    """from http://blog.kagesenshi.org/2008/02/teeing-python-subprocesspopen-output.html
    """
    p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    stdout = []
    while True:
        line = p.stdout.readline()
        stdout.append(line)
        print line,
        if line == '' and p.poll() != None:
            break
    return ''.join(stdout)

How to use the bash shell with Python's subprocess module instead of /bin/sh — posted 2011-04-13
How to get stdout and stderr using Python's subprocess module — posted 2008-09-23
How to use python and popen4 to capture stdout and stderr from a command — posted 2007-03-12

1 Comment — Comments feed for this post

#1 Paul commented on 2011-09-09:

I know you posted this two years ago, but just wanted to say THANKS. 2 hours of hunting for a solution on various dicussion board getting vauge answers...

This hit the nail on the head for my problem.

Post a comment


Name:	Required
Email:	Required, but not displayed
Website:	Optional
Comment:	Format using Markdown. (No HTML.) Code blocks: prefix each line by at least 4 spaces or 1 tab (and a blank line before and after) Code span: surround with backticks Blockquotes: prefix lines to be quoted with > Links: <URL> Links w/ description: [description](URL)