Run Python tests

Add tests for the writer #239

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Run time

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Job	Run time
Run tests (3.10)	38s
Run tests (3.12)	45s
Run tests (3.13)	36s
Run tests (3.8)	41s
Run tests (3.14)	31s
Run tests (3.9)	31s
Run tests (3.11)	29s
	4m 11s