TYP: Add type hint for DataFrame.T and certain array types #32532
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While updating a large pandas codebase with type coverage to 1.0, I noticed that
DataFrame.transpose()
is annotated to returnDataFrame
whileDataFrame.T
has no such hint. This PR also adds hints in a few places other places where they're trivial.The definition of
pandas.core.base.IndexOpsMixIn.transpose
(and associated.T
) currently do not have any type hints and fixing this seems more complicated, meaningIndex.T
andSeries.T
are not fixed by this PR.Happy to amend to cover that case if anyone has suggestions, but I believe
DataFrame.T
to be the vast majority of usage.black pandas
git diff upstream/master -u -- "*.py" | flake8 --diff