Backport PR #51895 on branch 2.0.x (BUG: Fix getitem dtype preservation with multiindexes) #53121
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* BUG/TST fix dtype preservation with multindex * lint * Update pandas/tests/indexing/multiindex/test_multiindex.py Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com> * cleanups * switch to iloc, reindex fails in some cases * suggestions from code review * address code review comments Co-Authored-By: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com> --------- Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com> Co-authored-by: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com> (cherry picked from commit 194b6bb)
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seems reasonable |
mroeschke
approved these changes
May 8, 2023
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xref #53119
cc @jorisvandenbossche @jbrockmendel
This fixes a pretty bad performance bottleneck for CoW. Would like to backport.