add a new feature sample() into groupby#33516

Closed

echozzy629 wants to merge 2 commits intopandas-dev:masterfrom

echozzy629:master

Commits on Apr 13, 2020

add a new feature sample() into groupby
echozzy629
committed
solve bug: Grouped-by column loses name when empty list of aggregations is specified.
echozzy629
committed