Fix flake8 issue #128

Job	Run time
compute-matrix	8s
checks / other-checks	32s
checks / check-style	41s
build-conda / compute-matrix	3s
build-wheels / compute-matrix	2s
build-wheels / 12.0.1, 3.12, amd64, rockylinux8	3m 21s
build-conda / build (12.0.1, amd64, 3.12, rockylinux8)	2m 16s
test-conda / compute-matrix	3s
build-docs / build	1m 48s
test-conda / tests (11.4.3, amd64, 3.9, ubuntu20.04, v100, latest)	8m 8s
test-conda / tests (11.8.0, amd64, 3.10, ubuntu20.04, v100, latest)	9m 36s
test-conda / tests (12.0.1, amd64, 3.11, ubuntu20.04, v100, latest)	7m 55s
test-conda / tests (12.5.1, amd64, 3.12, ubuntu20.04, v100, latest)	7m 51s
test-conda / tests (11.4.3, arm64, 3.9, ubuntu20.04, a100, latest)	9m 28s
test-conda / tests (11.8.0, arm64, 3.10, ubuntu20.04, a100, latest)	7m 33s
test-conda / tests (12.0.1, arm64, 3.11, ubuntu20.04, a100, latest)	6m 11s
test-conda / tests (12.5.1, arm64, 3.12, ubuntu20.04, a100, latest)	6m 1s
test-wheels / compute-matrix	2s
test-wheels / 11.8.0, 3.9, amd64, ubuntu20.04, v100	11m 30s
test-wheels / 11.8.0, 3.10, amd64, ubuntu20.04, v100	11m 14s
test-wheels / 12.0.1, 3.11, amd64, ubuntu20.04, v100	10m 45s
test-wheels / 12.5.1, 3.12, amd64, ubuntu20.04, v100	11m 7s
test-wheels / 11.8.0, 3.9, arm64, ubuntu20.04, a100	9m 14s
test-wheels / 11.8.0, 3.10, arm64, ubuntu20.04, a100	8m 33s
test-wheels / 12.0.1, 3.11, arm64, ubuntu20.04, a100	8m 55s
test-wheels / 12.5.1, 3.12, arm64, ubuntu20.04, a100	7m 48s
pr-builder / run	1s
	2h 30m 46s

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