Python tests

Fix many warning from `PYTHONDEVMODE=1` #5509

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Run time

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Job	Run time
test (ubuntu-22.04, 3.12)	5m 50s
test (ubuntu-22.04, 3.11)	3m 56s
test (ubuntu-22.04, 3.10)	5m 44s
test (macos-latest, 3.12)	10m 2s
test (macos-latest, 3.11)	8m 8s
test (macos-latest, 3.10)	11m 4s
	44m 44s