De-duplicate dispatch code, remove unreachable branches#22068

Merged

jreback merged 10 commits intopandas-dev:masterfrom

jbrockmendel:dispatch

Aug 8, 2018

Commits on Jul 28, 2018

Commits on Aug 1, 2018

Merge branch 'master' of https://github.com/pandas-dev/pandas into dispatch
jbrockmendel
committed

Commits on Aug 2, 2018