Use .get() constructs as suggested #6006

Job	Run time
Dependency	5s
Cache identify	5s
Shellcheck	7s
Prepare	8s
Ruff check and force	11s
Check commit	21s
Run pytest using Python ${{ matrix.python-version }}	0s
Run mypy	0s
Process test coverage	0s
Process test complexity	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
	57s

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