Backport PR #42166 on branch 1.3.x (REGR: preserve Int32 dtype on setitem)#42172

Merged

jreback merged 1 commit intopandas-dev:1.3.xfrom

meeseeksmachine:auto-backport-of-pr-42166-on-1.3.x

Jun 21, 2021

Commits on Jun 21, 2021

Backport PR #42166: REGR: preserve Int32 dtype on setitem

jbrockmendel
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meeseeksmachine
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