Refactor eventget.py sample to use pattern matching #1338

Job	Run time
mypy	24s
sdist	1m 2s
ruff	6s
parse_sdl (windows-latest, 3.2.16)	40s
parse_sdl (macos-latest, 3.2.16)	30s
build-macos (pp310-*)	4m 14s
pyodide	2m 42s
tox (ubuntu-latest)	2m 24s
test-docs	2m 15s
build (windows-latest, 3.10, x64)	4m 4s
build (ubuntu-latest, pypy-3.10, x64)	3m 5s
build-macos (cp310-*_universal2)	1m 50s
linux-wheels (aarch64, cp310-manylinux*)	3m 53s
linux-wheels (aarch64, pp310-manylinux*)	3m 39s
build (windows-latest, 3.10, x86)	4m 31s
build (ubuntu-latest, 3.10, x64)	3m 49s
build (windows-latest, pypy-3.10, x64)	3m 47s
linux-wheels (x86_64, pp310-manylinux*)	3m 41s
linux-wheels (x86_64, cp310-manylinux*)	4m 8s
publish	0s
	50m 44s

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