Backport PR #37787 on branch 1.1.x (Fix regression for loc and __setitem__ when one-dimensional tuple was given for MultiIndex)
Backport PR #37787: Fix regression for loc and __setitem__ when one-dimensional tuple was given for MultiIndex
fixture ``frame_or_series`` is not found @phofl yeah can you cherry-pick this commit on the the 1.1.x branch and fix up. Yep, will open a new PR. #37849