[issue14737] subprocess.Popen pipes not working
New submission from ganges master gangesmas...@users.sourceforge.net: Attempting to read from stdout of a running process seems broken on Python3.2. I've been able to reproduce this on Ubuntu 11.4 and Windows 7 (with /bin/sh installed as part of git for windows) Python 3.2 (r32:88445, Dec 8 2011, 15:26:51) [GCC 4.5.2] on linux2 Type help, copyright, credits or license for more information. from subprocess import Popen, PIPE p=Popen([/bin/sh], stdin=PIPE, stderr=PIPE, stdout=PIPE) p.stdin.write(becho hello\n) 11 p.stdout.readline() stuck from subprocess import Popen, PIPE p=Popen([/bin/sh], stdin=PIPE, stderr=PIPE, stdout=PIPE) p.stdin.write(becho hello\n) 11 p.stdout.read(2) stuck For comparison, on python 2.7 (again, linux and windows: Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) [GCC 4.5.2] on linux2 Type help, copyright, credits or license for more information. from subprocess import Popen, PIPE p=Popen([/bin/sh], stdin=PIPE, stderr=PIPE, stdout=PIPE) p.stdin.write(becho hello\n) p.stdout.readline() 'hello\n' -- components: Library (Lib) messages: 160075 nosy: gangesmaster priority: normal severity: normal status: open title: subprocess.Popen pipes not working versions: Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14737 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14737] subprocess.Popen pipes not working
Antoine Pitrou pit...@free.fr added the comment: Works with 3.2.2: Python 3.2.2+ (3.2:9ef20fbd340f, Oct 15 2011, 21:22:07) [GCC 4.5.2] on linux2 Type help, copyright, credits or license for more information. from subprocess import Popen, PIPE p=Popen([/bin/sh], stdin=PIPE, stderr=PIPE, stdout=PIPE) p.stdin.write(becho hello\n) 11 p.stdout.readline() b'hello\n' Try calling p.stdin.flush() perhaps? -- nosy: +gregory.p.smith, pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14737 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14737] subprocess.Popen pipes not working
ganges master gangesmas...@users.sourceforge.net added the comment: hmm, it does work when i call flush, but it works perfectly fine without flushing on python2.x... i guess this has to do with str/bytes again. maybe this should be documented somewhere? thanks for the tip though. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14737 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14737] subprocess.Popen pipes not working
Antoine Pitrou pit...@free.fr added the comment: Nothing to do with str/bytes, actually; I think it was fixed in #11459 (changeset 7451da272111), so you might want to upgrade your Python 3.2 (or use the flush() workaround). -- resolution: - out of date stage: - committed/rejected status: open - closed superseder: - Python select.select does not correctly report read readyness ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14737 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
