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BUG: Series.align(join='left') and join='right' are inverted #10665

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gdementen opened this issue Jul 24, 2015 · 3 comments · Fixed by #10716
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BUG: Series.align(join='left') and join='right' are inverted #10665

gdementen opened this issue Jul 24, 2015 · 3 comments · Fixed by #10716
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Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
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0.17.0

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@gdementen
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join='left' does a right join and 'right' does a left join

See the notebook for details
https://nbviewer.jupyter.org/gist/gdementen/fa4d388993ee981b5698
@gdementen
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btw, this is with pandas 0.16.2

@gdementen gdementen changed the title Series.align(join='left') and join='right' are inverted BUG/Series.align(join='left') and join='right' are inverted Jul 24, 2015
@gdementen gdementen changed the title BUG/Series.align(join='left') and join='right' are inverted BUG: Series.align(join='left') and join='right' are inverted Jul 24, 2015
@gdementen
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probably related to (possibly a dupe of, I am not sure) #10147.
The strange thing, is that for DataFrames, align seems to work correctly.

@sinhrks
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sinhrks commented Jul 29, 2015

Thanks. Looks to be caused by the following lines.

When Series with MultiIndex is on left side, how=left and right must be flipped also. PR is appreciated!

@sinhrks sinhrks added Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode labels Jul 29, 2015
@sinhrks sinhrks mentioned this issue Aug 1, 2015
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@jreback jreback mentioned this issue Aug 3, 2015
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@jreback jreback added this to the 0.17.0 milestone Aug 3, 2015
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BUG: Series.align with MultiIndex may be inverted sinhrks/pandas
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@gdementen @jreback @sinhrks