New issue 792: Native support for HDF5 grid structure https://bitbucket.org/yt_analysis/yt/issue/792/native-support-for-hdf5-grid-... Girish Nivarti: Although yt imports HDF5 data when all fields are stored under the root directory, there seems to be no support for reading data stored under groups. One has to go through the somewhat laborious route of importing data as numpy arrays from h5py.