Raise exception with pd.MultiIndex.
Raise exception with pd.MultiIndex.

jcrist/dask,blaze/dask,mraspaud/dask,ContinuumIO/dask,vikhyat/dask,jakirkham/dask,chrisbarber/dask,gameduell/dask,jcrist/dask,blaze/dask,mraspaud/dask,ContinuumIO/dask,mikegraham/dask,jakirkham/dask,cpcloud/dask,vikhyat/dask,mrocklin/dask,cowlicks/dask,dask/dask,dask/dask,mrocklin/dask