code: def find(self, v: int) -> int:
      par = self.parent[v]
      if v == par:
          return v
      assert par is not None
      self.parent[v] = self.find(par)
      return cast(int, self.parent[v])
  
imports: import torch.fx
  from torch.fx.node import Argument, Target
  from torch.nn.utils.fusion import fuse_conv_bn_eval
  from typing import Type, Dict, Any, Tuple, Iterable, Optional, List, cast
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.fx.passes.shape_prop import ShapeProp
  import copy
  from collections import defaultdict
  import torch.utils.mkldnn
  import operator
  import time
  import logging
  from enum import Enum
label_desc: Use image node_id 3 for calling the UnionFind obj's underlying member method code with example usage: obj.find(v) and returns: cast, v