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Description
This PR resolves pre-commit deprecation warnings that are appearing in CI (recent example).
In addition, it updates the pyupgrade configuration to target Python 3.9+ compatibility, and commits the changes introduced by
pre-commit run -a
, and fixes the resulting flake8 complaints.While this resolves existing deprecation warnings, I recommend updating the flake8-bugbear plugin to the latest version (you can install and run
upadup
to accomplish this automatically, or copy-and-paste the version shown in the console logs below). The plugin version in the pre-commit config is two years old, and new versions are throwing new warnings.Type of change
Choose which options apply, and delete the ones which do not apply.