CLN: flake8 cleanup of core.internals#19202

Closed

jbrockmendel wants to merge 2 commits intopandas-dev:masterfrom

jbrockmendel:internal_cleanup

Commits on Jan 12, 2018

flake8 cleanup
jbrockmendel
committed

Commits on Jan 13, 2018

Catch specifically ValueError
jbrockmendel
committed