“Missing required package 'python-pyudev'” on Ubuntu 20.04

[nclm]

Information

• Solaar version: 1.0.1+dfsg-3
• Distribution: Ubuntu 20.04
• Kernel version: 5.4.0-29-generic x86_64

Describe the bug
Solaar doesn’t launch (any more). When trying it from the command line, I get this error:

Solaar: missing required package 'python-pyudev'

However, the package python3-pyudev is installed on my system.

Additional context
I haven’t used my keyboard for a couple of weeks, and now that I want to use it again, I realised Solaar does not work any more. What I did since last time is to upgrade my Ubuntu to version 20.04.

[pfps]

This is probably a python 2 vs 3 problem. Either use a newer version of Solaar or try running Solaar with python3.

[pfps]

If you already have Solaar installed, one way to install (for yourself only) and run the current (as of 22 May 2020) version of Solaar is via

pip install --user solaar
~/.local/bin/solaar

This doesn't mess with any system stuff.

[trinitronx]

pip install --user solaar

For Ubuntu 20.04 with python3-pip (or other distros without pip linked to pip3):

pip3 install --user solaar

[Easy121]

I encountered the same problem (Solaar: missing required package 'python-pyudev') today, when I tried to run an old release (Solaar 1.1.1) downloaded from github release with bin/solaar -dd config "MX Keys" change-host 1. And in my system, python3-pyudev is already installed.

Solution: I realized that I'm using pyenv with python 3.9.13, instead of the system python. So after running pyenv local system, Solaar 1.1.1 can be tested without error.