message: follow python coding style
diff: @@ -546,10 +546,11 @@ def norm(tensor,
  axes = list(range(rank))
  perm_before = list(filter(lambda i: i not in axis, axes)) + list(axis)
  perm_after = list(map(lambda i: perm_before.index(i), axes))
  - result = array_ops.transpose(array_ops.expand_dims(math_ops.reduce_max(
  - gen_linalg_ops.svd(array_ops.transpose(tensor, perm=perm_before),
  - compute_uv=False)[0], axis=-1, keepdims=True),
  - axis=-1), perm=perm_after)
  + result = array_ops.transpose(array_ops.expand_dims(
  + math_ops.reduce_max(gen_linalg_ops.svd(
  + array_ops.transpose(tensor, perm=perm_before),
  + compute_uv=False)[0], axis=-1, keepdims=True), axis=-1),
  + perm=perm_after)
  else:
  result = math_ops.sqrt(
  math_ops.reduce_sum(
  