BUG: Bug in groupby returning non-consistent types when user function returns a None, (GH5992)#5593

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jreback merged 1 commit intopandas-dev:masterfrom

jreback:groupby_apply

Nov 26, 2013

Commits on Nov 26, 2013

BUG: Bug in groupby returning non-consistent types when user function returns a None, (GH5592)
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