mypy

gh-144173: fix flaky test_complex.test_truediv() (#144355) #19872

Job	Run time
Run mypy on Tools/clinic	19s
Run mypy on Lib/tomllib	18s
Run mypy on Lib/test/libregrtest	42s
Run mypy on Tools/build	22s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/jit	17s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/cases_generator	19s
	3m 11s

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