code: def decode_i32_vec(self, vec):
      return torch.tensor(self.coder.decode_u32_vec(vec))
  
imports: from typing import List, Optional, Tuple
  import torch
  from fate_utils.ou import CiphertextVector, PlaintextVector
  from fate_utils.ou import Coder
  from fate_utils.ou import Evaluator
  from fate_utils.ou import PK
  from fate_utils.ou import SK
  from fate_utils.ou import keygen
  from .type import TensorEvaluator
label_desc: Use image node_id 18 for calling the Coder obj's underlying member method code with example usage: obj.decode_i32_vec(vec) and returns: torch