code: def from_dict(d):
          
          kraus_ops = [KrausModel.unpack_kraus_matrix(k) for k in d['kraus_ops']]
          return KrausModel(d['gate'], d['params'], d['targets'], kraus_ops, d['fidelity'])
docs: Recreate a KrausModel from the dictionary representation.
  
          :param dict d: The dictionary representing the KrausModel. See `to_dict` for an
              example.
          :return: The deserialized KrausModel.
          :rtype: KrausModel