code: def __iter__(self):
      return self
  
imports: import json
  import re
  from threading import Lock
  from typing import Any, Callable, Generator, List, Optional
  import jieba
  import torch
  import torch.distributed
  import torch.nn
  from pydantic import BaseModel, Field
label_desc: Use image node_id 2 for calling the LockedIterator obj's underlying member method code with example usage: obj.__iter__() and returns: self