class_docstr: Object class to write the index (.idx) file
  
  Args:
      idx_path (str): The path to the index file
  
      dtype (Type[numpy.number]): The dtype of the index file
class_docstr_tok: ["Object","class","to","write","the","index","(",".idx",")","file","Args",":","idx_path","(","str",")",":","The","path","to","the","index","file","dtype","(","Type","[","numpy.number","]",")",":","The","dtype","of","the","index","file"]
docstr: Exit the context introduced by the 'with' keyword
  
  Args:
      exc_type (Optional[Type[BaseException]]): Exception type
  
      exc_val (Optional[BaseException]): Exception value
  
      exc_tb (Optional[TracebackType]): Exception traceback object
  
  Returns:
      Optional[bool]: Whether to silence the exception
docstr_tok: ["Exit","the","context","introduced","by","the","'with","'","keyword","Args",":","exc_type","(","Optional","[","Type","[","BaseException","]","]",")",":","Exception","type","exc_val","(","Optional","[","BaseException","]",")",":","Exception","value","exc_tb","(","Optional","[","TracebackType","]",")",":","Exception","traceback","object","Returns",":","Optional","[","bool","]",":","Whether","to","silence","the","exception"]
code: def __exit__(
      self,
      exc_type: Optional[Type[BaseException]],
      exc_val: Optional[BaseException],
      exc_tb: Optional[TracebackType],
  ) -> Optional[bool]:
      """Exit the context introduced by the 'with' keyword
  
      Args:
          exc_type (Optional[Type[BaseException]]): Exception type
  
          exc_val (Optional[BaseException]): Exception value
  
          exc_tb (Optional[TracebackType]): Exception traceback object
  
      Returns:
          Optional[bool]: Whether to silence the exception
      """
      self.idx_writer.close()
  
imports: import logging
  import os
  import shutil
  import struct
  import time
  from enum import Enum
  from functools import lru_cache
  from itertools import accumulate
  from types import TracebackType
  from typing import List, Optional, Tuple, Type, Union
  import numpy
  import torch
  from megatron.core.datasets.utils import log_single_rank
label_desc: Use image node_id 3 for calling the _IndexWriter obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_val, exc_tb) without return types