simplify slicing
simplify slicing

ssanderson/dask,vikhyat/dask,PhE/dask,ContinuumIO/dask,ContinuumIO/dask,pombredanne/dask,freeman-lab/dask,mrocklin/dask,vikhyat/dask,wiso/dask,mraspaud/dask,blaze/dask,cpcloud/dask,jcrist/dask,jakirkham/dask,wiso/dask,minrk/dask,marianotepper/dask,esc/dask,chrisbarber/dask,clarkfitzg/dask,dask/dask,PhE/dask,simudream/dask,jakirkham/dask,jayhetee/dask,simudream/dask,ssanderson/dask,gameduell/dask,jayhetee/dask,pombredanne/dask,mikegraham/dask,dask/dask,clarkfitzg/dask,blaze/dask,marianotepper/dask,jcrist/dask,minrk/dask,hainm/dask,mraspaud/dask,hainm/dask,esc/dask,mrocklin/dask,freeman-lab/dask,cowlicks/dask