BUG: chokes on pd.DatetimeTZDtype if there are no rows.

pandas-dev / pandas

Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

https://pandas.pydata.org

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BUG: chokes on pd.DatetimeTZDtype if there are no rows. #59123

Closed pcorpet closed 1 day ago

pcorpet commented 3 days ago

This is a follow up to #41875

[X] closes #59126
[x] Tests added and passed if fixing a bug or adding a new feature
[x] All code checks passed.
[x] Added type annotations to new arguments/methods/functions.
[x] Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

mroeschke commented 3 days ago

Is there an issue open for this?

pcorpet commented 3 days ago

I'd welcome some help to understand where/how to add a proper test. I have added a simple repro (3 lines) in the bug

mroeschke commented 3 days ago

If you could add a unit test in pandas/tests/reshape/test_pivot.py that mimics your reproducer that would be great

mroeschke commented 1 day ago

Thanks @pcorpet