code: def set_key(self, skey, bkey):
      self.register_buffer("skey", skey)
      self.register_buffer("bkey", bkey)
  
imports: import random
  import torch
  from torch import nn
  import numpy
  from typing import Literal
label_desc: Use image node_id 4 for calling the PassportBlock obj's underlying member method code with example usage: obj.set_key(skey, bkey) without return types