support py3 by avoiding dict.values()[0]
support py3 by avoiding dict.values()[0]

cpcloud/dask,mrocklin/dask,mraspaud/dask,mrocklin/dask,dask/dask,wiso/dask,chrisbarber/dask,jcrist/dask,dask/dask,ssanderson/dask,wiso/dask,mikegraham/dask,ssanderson/dask,jcrist/dask,jakirkham/dask,jakirkham/dask,ContinuumIO/dask,blaze/dask,jayhetee/dask,mraspaud/dask,ContinuumIO/dask,vikhyat/dask,PhE/dask,vikhyat/dask,cowlicks/dask,jayhetee/dask,clarkfitzg/dask,gameduell/dask,pombredanne/dask,PhE/dask,blaze/dask,pombredanne/dask,clarkfitzg/dask