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comp / comp.lang.python / subprocess.Popen does not launch audacity

SubjectAuthor
* subprocess.Popen does not launch audacityTim Johnson
`- Re: subprocess.Popen does not launch audacityGilmeh Serda

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Subject: subprocess.Popen does not launch audacity
From: Tim Johnson
Newsgroups: comp.lang.python
Date: Fri, 10 Jan 2025 19:15 UTC
References: 1
Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail
From: thjmmj15@gmail.com (Tim Johnson)
Newsgroups: comp.lang.python
Subject: subprocess.Popen does not launch audacity
Date: Fri, 10 Jan 2025 10:15:50 -0900
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Using Python 3.12.3 on Ubuntu 24.04

I've converted a legacy python2 script to python3. All went well.
However, a glitch from python2 remains.

The script uses dmenu to create menus to pick applications. Applications
are then invoked from python

using subprocess.Popen(). I have never been able to successfully launch
audacity using this approach,

which does work for other apps.

I can launch audacity successfully using dmenu_run (on its own, outside
of the script)

Below is the pertinent code:

 Popen(choice, stdout=PIPE, stderr=PIPE,
                  stdin=PIPE, close_fds=True)

My guess is my argument list is either insufficient or an argument is
causing the problem, but am unsure of which.

I have been retired from python programming for ten years, and am pretty
rusty, but it is still fun. There are plenty

of other ways to successfully launch audacity but it would be great to
make it work from this script.

Thanks in advance

Tim

Subject: Re: subprocess.Popen does not launch audacity
From: Gilmeh Serda
Newsgroups: comp.lang.python
Organization: Easynews - www.easynews.com
Date: Fri, 10 Jan 2025 21:46 UTC
References: 1 2
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From: gilmeh.serda@nothing.here.invalid (Gilmeh Serda)
Subject: Re: subprocess.Popen does not launch audacity
Newsgroups: comp.lang.python
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On Fri, 10 Jan 2025 10:15:50 -0900, Tim Johnson wrote:

> using subprocess.Popen(). I have never been able to successfully launch
> audacity using this approach,

Some thoughts you might try:

What does your .desktop file say (launcher menu)? Assuming you have it
installed that way. Or is it a flatpak or something?

Read the .desktop file so you use the exact same command. It might not be
what you expected. It might need some option or it's a different command
from what you thought.

Or, try the command you used, but at the prompt, does that work? Get any
errors?

Or try something simpler, like without PIPEs, sort of back to basics, as
it were.

What's in "choice" variable? Only the (correct) command, or something else
also? Test it to be sure, it's easy to add things that shouldn't be there
in a moment of a brain fatigue.

Does it work outside your script file? For instance by invoking the Python
prompt and try there?

--
Gilmeh

They are relatively good but absolutely terrible. -- Alan Kay, commenting
on Apollos

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