[New-bugs-announce] [issue3687] Popen() object stdout attribute reassignment behaviour

Vincent Legoll report at bugs.python.org
Tue Aug 26 17:57:45 CEST 2008

New submission from Vincent Legoll <vincent.legoll at gmail.com>:

The subprocess.Popen() object documentation should indicate
that the stdout attribute should not be modified after
object construction. Because that won't work.

Or the attribute may be rendered read-only

>>> from subprocess import Popen, PIPE
>>> import sys, os
>>> p1 = Popen(["echo", "1"], stdout = PIPE)
>>> p2 = Popen(["cat"], stdin = p1.stdout, stderr = PIPE, stdout = PIPE)
>>> p2.stdout = sys.stdout
>>> print p2.communicate()

This blocks forever

assignee: georg.brandl
components: Documentation
messages: 71983
nosy: georg.brandl, vincent.legoll
severity: normal
status: open
title: Popen() object stdout attribute reassignment behaviour
type: behavior
versions: Python 2.5

Python tracker <report at bugs.python.org>

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