message: Change backend
diff: @@ -627,7 +627,7 @@ def save_weights_to_hdf5_group(f, layers):
  save_attributes_to_hdf5_group(
  f, 'layer_names', [layer.name.encode('utf8') for layer in layers])
  - f.attrs['backend'] = K.backend().encode('utf8')
  + f.attrs['backend'] = K.backend()
  f.attrs['keras_version'] = keras_version
  # Sort model layers by layer name to ensure that group names are strictly
  @@ -663,7 +663,7 @@ def load_weights_from_hdf5_group(f, layers):
  else:
  original_keras_version = '1'
  if 'backend' in f.attrs:
  - original_backend = f.attrs['backend'].decode('utf8')
  + original_backend = f.attrs['backend']
  else:
  original_backend = None
  @@ -734,7 +734,7 @@ def load_weights_from_hdf5_group_by_name(
  else:
  original_keras_version = '1'
  if 'backend' in f.attrs:
  - original_backend = f.attrs['backend'].decode('utf8')
  + original_backend = f.attrs['backend']
  else:
  original_backend = None
  