code: def fix_attr_encoding(ds):
      
  
      def _maybe_del_attr(da, attr):
          """ Possibly delete an attribute on a DataArray if it's present """
          if attr in da.attrs:
              del da.attrs[attr]
          return da
  
      def _maybe_decode_attr(da, attr):
          # TODO: Fix this so that bools get written as attributes just fine
          """ Possibly coerce an attribute on a DataArray to an easier type
          to write to disk. """
          # bool -> int
          if (attr in da.attrs) and (type(da.attrs[attr] == bool)):
              da.attrs[attr] = int(da.attrs[attr])
          return da
  
      for v in ds.data_vars:
          da = ds[v]
          da = _maybe_del_attr(da, 'scale_factor')
          da = _maybe_del_attr(da, 'units')
          da = _maybe_decode_attr(da, 'hydrocarbon')
          da = _maybe_decode_attr(da, 'chemical')
      # Also delete attributes on time.
      if hasattr(ds, 'time'):
          times = ds.time
          times = _maybe_del_attr(times, 'units')
  
      return ds
docs: This is a temporary hot-fix to handle the way metadata is encoded
      when we read data directly from bpch files. It removes the 'scale_factor'
      and 'units' attributes we encode with the data we ingest, converts the
      'hydrocarbon' and 'chemical' attribute to a binary integer instead of a
      boolean, and removes the 'units' attribute from the "time" dimension since
      that too is implicitly encoded.
  
      In future versions of this library, when upstream issues in decoding
      data wrapped in dask arrays is fixed, this won't be necessary and will be
      removed.