Bugfix for multilevel columns with empty strings in Python 2#17099

Merged

jreback merged 6 commits intopandas-dev:masterfrom

chrisjbillington:getitem-multilevel-bugfix

Aug 10, 2017

Commits on Jul 27, 2017

Allow unicode empty strings to be used as placeholders in multilevel column names in Python 2
chrisjbillington
committed
added test for unicode multilevel column placeholders
chrisjbillington
committed

Commits on Jul 28, 2017

Added whatsnew note, modfied tests for mixed level columns based on pull request review
chrisjbillington
committed

Commits on Jul 29, 2017

Dedup test, added descriptive comment to _getitem_multilevel().
chrisjbillington
committed

Commits on Aug 9, 2017

merge
chrisjbillington
committed

Commits on Aug 10, 2017

parametrize test, simplified whatnew note
chrisjbillington
committed