BUG: Fixed nlargest/smallest functionality for dataframes with MultiIndex columns#23034

Merged

jreback merged 7 commits intopandas-dev:masterfrom

KristianHolsheimer:master

Oct 24, 2018

Commits on Oct 23, 2018

By convention, tuples indicate multi-level lookups. This change fixes nlargest/smallest functionality for dataframes with MultiIndex columns.
Kristian Holsheimer
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Fixed tests (tuples are reserved for multi-level lookups)
Kristian Holsheimer
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Added test coverage for multi-level (tuple) lookups.
Kristian Holsheimer
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Updated test: Added github issue id and used 'tm' instead of 'pd.util.testing'
Kristian Holsheimer
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Added whatsnew note in Bug Fixes / Reshaping
Kristian Holsheimer
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Fixed typo
Kristian Holsheimer
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fixed whatsnew note: was in wrong section
Kristian Holsheimer
committed