DisplayCAL won't run with python 3.11

Software
1

I recently did a fresh install of Arch Linux and it installed python 3.11 which apparently breaks DisplayCAL. When I run it I get

Traceback (most recent call last):
  File "/usr/bin/displaycal", line 4, in <module>
    from DisplayCAL.main import main
  File "/usr/lib/python3.11/site-packages/DisplayCAL/main.py", line 27, in <module>
    raise RuntimeError(
RuntimeError: Need Python version >= 3.8 <= 3.10, got 3.11.3

So I obviousy thought I would downgrade python and I tried both 3.9 and 3.10, but neither worked.

Now I get this error

Traceback (most recent call last):
  File "/usr/bin/displaycal", line 4, in <module>
    from DisplayCAL.main import main
ModuleNotFoundError: No module named 'DisplayCAL'

Any ideas hot to get DisplayCAL to work?

2

Yep, python 3 won’t do as far as I’m aware and there doesn’t seem to be much development done to get it ported/rewritten for python3. There’s an old and long thread about this here on pixls.

I know there’s a flatpak version, which would circumvent the python version thing:

~ $ flatpak search displaycal
Name     Description                                                     Application ID          Version Branch Remotes
Display? Display calibration and profiling with a focus on accuracy and? ?.displaycal.DisplayCAL 3.8.9.3 stable flathub

Haven’t tried that one myself (I’m still on python 2.X), but it might do the trick for you.

3

It’s been working with python 3 for quite some time.

It’s just now as of python 3.11 that it stopped working.

4

Sorry, did not realize that… Still thought that the DisplayCal and Python 3 combo was a bit of a mess, I stand corrected.

Had a look at the GitHub you mentioned and there are some open (and closed) issues/pull request that are related to python 3.11. Not sure, though, if any of those touch your specific issue.

5
  1. where did you install displaycal from?
  2. @eoyilmaz is maintaining a fork. maybe they just need help testing if it works under 3.11 before they do a release that enables 3.11.

you can do that testing by changing the line that blocks 3.11 and then try to use the software.

6

Arch Official Repos (community)

How do I do that?

7

I eventually managed to go around it and use a flatpak version.

8

according to displaycal-py3/README.md at main · eoyilmaz/displaycal-py3 · GitHub
„Currently, DisplayCAL is working with Python 3.8, 3.9 and 3.10 and wxPython 4.1.1 or 4.2.0.“

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