Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.000
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'subject:help': 0.08; '__init__': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; '.py': 0.16; '2.6.4': 0.16; 'cmd': 0.16; 'command,': 0.16; 'errread,': 0.16; 'errwrite)': 0.16; 'inserting': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'time"': 0.16; 'alpha': 0.16; 'wrote:': 0.18; 'bit': 0.19; '(but': 0.19; 'subject:request': 0.19; 'written': 0.21; '>>>': 0.22; 'import': 0.22; 'print': 0.22; 'header:User-Agent:1': 0.23; 'config': 0.24; 'skip:" 30': 0.26; 'switch': 0.26; 'skip:_ 20': 0.27; 'header:X -Complaints-To:1': 0.27; 'on,': 0.29; 'raise': 0.29; "doesn't": 0.30; 'code': 0.31; '"",': 0.31; 'option.': 0.31; 'sep': 0.31; 'work:': 0.31; 'file': 0.32; 'run': 0.32; 'running': 0.33; '(most': 0.33; 'skip:_ 10': 0.34; 'but': 0.35; 'version': 0.36; 'ubuntu': 0.36; 'should': 0.36; 'so,': 0.37; 'too': 0.37; 'starting': 0.37; 'to:addr:python-list': 0.38; 'recent': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'even': 0.60; 'new': 0.61; 'such': 0.63; 'more': 0.64; 'believe,': 0.84; 'missing.': 0.84; 'plugins': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Peter Otten <__peter__@web.de>
Subject: Re: My first real request for help
Date: Tue, 19 Nov 2013 11:16:41 +0100
Organization: None
References: <201311190431.15449.gheskett@wdtv.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Gmane-NNTP-Posting-Host: p508487f6.dip0.t-ipconnect.de
User-Agent: KNode/4.7.3
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.2902.1384856198.18130.python-list@python.org>
Lines: 69
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1384856198 news.xs4all.nl 15882 [2001:888:2000:d::a6]:33473
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:59974

Gene Heskett wrote:

> Old python, 2.6.4 I believe, not update able from the Ubuntu 10.04.3 LTS
> repo's.
> 
> Should be a mauchs nichs as the code was written on, and is running on,
> several of these same linuxcnc installs.
> 
> But when I switch in, as one of the plugins a new .py version of camview-
> emc, I get this when I attempt to run linuxcnc -l, where the -l is "use
> the same config as last time" option.
> 
> Starting LinuxCNC...
> Traceback (most recent call last):
>   File "/usr/bin/axis", line 3326, in <module>
>     _dynamic_tabs(inifile)
>   File "/usr/bin/axis", line 3182, in _dynamic_tabs
>     child = Popen(cmd)
>   File "/usr/lib/python2.6/subprocess.py", line 633, in __init__
>     errread, errwrite)
>   File "/usr/lib/python2.6/subprocess.py", line 1139, in _execute_child
>     raise child_exception
> OSError: [Errno 2] No such file or directory
> 
> No clue, even when straced, as to what file might be missing.
> 
> So, how do I find out?

How about inserting a

print cmd

before the line 

child = Popen(cmd)

? Depending on its value it may not even be a missing command, e. g.
This doesn't work:

Python 2.6.7 (r267:88850, Sep 28 2012, 16:26:39) 
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> subprocess.Popen("ls -1")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.6/subprocess.py", line 623, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1141, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

But this works:

>>> subprocess.Popen(["ls", "-1"])
<subprocess.Popen object at 0x7f8b31c5cfd0>
>>> alpha
beta
gamma

And this works, too (but is a bit less robust):

subprocess.Popen("ls -1", shell=True)
<subprocess.Popen object at 0x7f8b31c5cd90>
>>> alpha
beta
gamma