code: def encode_i32(self, val: int):
      return self.coder.encode_u32(val)
  
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 13 for calling the Coder obj's underlying member method code with example usage: obj.encode_i32(val) and returns: self