ERROR: After October 2020 you may experience errors when installing or updating packages. This is because pip will change the way that it resolves dependency conflicts.
We recommend you use --use-feature=2020-resolver to test your packages with the new resolver before it becomes the default.
launchpadlib 1.10.6 requires testresources, which is not installed.
sudo apt install -yqq python3-testresources
Python
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