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comp / comp.lang.python / Re: No module name mutagen

Subject: Re: No module name mutagen
From: Peter J. Holzer
Newsgroups: comp.lang.python
Date: Wed, 1 Jan 2025 13:16 UTC
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From: hjp-python@hjp.at (Peter J. Holzer)
Newsgroups: comp.lang.python
Subject: Re: No module name mutagen
Date: Wed, 1 Jan 2025 14:16:34 +0100
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On 2024-12-31 15:00:10 -0900, Tim Johnson via Python-list wrote:
> being retired for ten years, I get my butt kicked by python dependencies
> every time I upgrade ubuntu. (I'm newly on 24.04) now.
>
> Now, after three weeks on using the following code correctly:
>
> from mutagen import mp3, id3, File as mutaFile
> from mutagen.id3 import ID3, TIT2, TPE1
>
> I am as of today, getting an import error for mutagen.

So what changed between the last time it worked and today? Did you
upgrade anything, install anything, delete anything, change permissions,
etc.? Or maybe just invoke your scripts in a different context
(different user, different environment) than before?

> Mutagen package is
> installed at /root/.local/share/pipx/shared/lib/python3.12/site-packages

As Michael already noted, /root is not normally accessible by normal
users. So installing stuff into /root/.local is a bad idea unless you
only ever want to use it as root (which in the case of an audio metadata
library seems unlikely).

> Must I be using a virtual environment?

I use virtual environments a lot, but that may not be the best option
for you. Especially if you mostly writing command line tools and having
difficulties with upgrades, it might be a good idea to stick with
packages supplied by Ubuntu (I'm guessing that “24.04” above refers to
“Ubuntu 24.04 LTS”). There are over 5000 of them, so it is very likely
that you don't need anything else. This way Ubuntu's package management
will take care of all the dependencies.

Good reasons to use virtual enviroments (on Linux) include:

* You have many different products[1] with different requirements
running on several computers and you want to decouple upgrades of your
products from upgrades to the hosts' OS.
* You need either a package or a specific version not supplied by your
distribution.
* You can't install packages on the target host.

A not so good reason is:

* You are not familiar with your distribution's package manager.

[1] By "product" I mean a collection of software for a common purpose.
That might be a collection of scripts, it might be web site, etc.

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Subject	Author
Re: No module name mutagen	Peter J. Holzer