BUG: fix Frame getitem when column keys are nested tuples#43939

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Svanazar wants to merge 2 commits intopandas-dev:mainfrom

Svanazar:mulsel-tuple-index

Commits on Oct 9, 2021

TST: add test for Frame getitem when column keys are nested tuples #43780
Svanazar
committed
BUG: fix Frame getitem when column keys are nested tuples #43780
Svanazar
committed