code: def pack_squeeze(a: EV, pack_num: int, shift_bit: int, pk: PK) -> EV:
      return a.pack_squeeze(pack_num, shift_bit, pk.pk)
  
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 25 for calling the evaluator obj's underlying member method code with example usage: obj.pack_squeeze(a, pack_num, shift_bit, pk) and returns: a