GH6322, Bug on reset_index for a MultiIndex of all NaNs #15466
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The reset_index function fails for a MultiIndex if at least one column of the index is all NaN.
jreback added Bug Missing-data 
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| thanks @tzinckgraf (you had a couple of flake issues, but I fixed on merge) |
Contributor Author
| @jreback thank you. I ran |
AnkurDedania pushed a commit to AnkurDedania/pandas that referenced this pull request Mar 21, 2017
closes pandas-dev#6322 Author: tzinckgraf <tzinckgraf@gmail.com> Closes pandas-dev#15466 from tzinckgraf/GH6322 and squashes the following commits: 35f97f4 [tzinckgraf] GH6322, Bug on reset_index for a MultiIndex of all NaNs
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The reset_index function fails for a MultiIndex if at
least one column of the index is all NaN.
git diff upstream/master | flake8 --diffAs per the comment in the issue, I tried other solutions such as putting the
takeunder anif len(values)call, unfortunately that broke other issues downstream.I started to investigate and it seems like a
MultiIndexmakes a category that ignoresNaN, so thevaluesin thereset_indexis empty. After trying a few options, theif mask.all()seemed like the simplest change.