docs: def dictToH5(h5, d, link_copy=False):
      """ Save a dictionary into an hdf5 file
          h5py is not capable of handling dictionaries natively"""
      global _array_cache
      _array_cache = dict()
      h5 = h5py.File(h5, mode="w")
      dictToH5Group(d, h5["/"], link_copy=link_copy)
      h5.close()
      _array_cache = dict();