Specify that both by and level should not be specified in groupby - GH40378
#47778
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mroeschke
approved these changes
Jul 18, 2022
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Thanks @GivyBoy |
rhshadrach
reviewed
Jul 18, 2022
| More on the ``sum`` function and aggregation later. | ||
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| When using ``.groupby()`` on a DatFrame with a MultiIndex, do not specify both ``by`` and ``level``. | ||
| The argument validation should be done in ``.groupby()``, using the name of the specific index. |
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I think the last line here is coming from #40378 (comment). I was stating that the pandas code should validate the arguments, I don't understand what this sentence means in the documentation.
Also, I think this should be specified in the API docs for Series/DataFrame.groupby too.
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Hi! Thanks for the comments. I have submitted a new pull request (#47825). Feel free to look at the code. Thanks!
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.