BUG: Fix empty MultiIndex DataFrame xlsx export #57697
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MultiIndex on both axes, with zero rows.
rhshadrach
requested changes
Mar 1, 2024
| ) | ||
| df.to_excel(tmp_excel) | ||
| result = pd.read_excel(tmp_excel, header=None) | ||
| assert result.iloc[:2, -1].to_list() == ["A", "B"] |
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Can you test the entire result? I think if you change the read line to
result = pd.read_excel("tmp.xlsx", header=[0, 1], index_col=[0, 1])
Then you should just be able to do
tm.assert_frame_equal(result, df)
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thanks, that looks better and works exactly like you said.
doc/source/whatsnew/v3.0.0.rst
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| @@ -324,6 +324,7 @@ MultiIndex | |||
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| I/O | |||
| ^^^ | |||
| - Bug in :class:`io.formats.excel.ExcelFormatter` when writing empty :class:`DataFrame` with :class:`MultiIndex` on both axes (:issue:`57696`) | |||
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I believe ExcelFormatter is private; can you change to to :meth:`DataFrame.to_excel`
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Thanks @speleo3 - nice fix! |
pmhatre1
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to pmhatre1/pandas-pmhatre1
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this pull request
May 7, 2024
|
Thanks a lot for fixing this. I'm running into this exact issue at work. Since 3.0.0 hasn't been released yet, is there a workaround in the meantime? |
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My attempt: if df.empty and not df.columns:
df.columns = [] |
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Fix Excel xlsx export of empty (zero rows) DataFrame with MultiIndex on both axes.
doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.