class_docstr: This thread is responsible to download the chunks associated to a given worker.
docstr: Receive the list of the chunk indices to delete for the current epoch.
docstr_tok: ["Receive","the","list","of","the","chunk","indices","to","delete","for","the","current","epoch","."]
code: def delete(self, chunk_indexes: List[int]) -> None:
      """Receive the list of the chunk indices to delete for the current epoch."""
      for chunk_index in chunk_indexes:
          self._to_delete_queue.put(chunk_index)
  
imports: import contextlib
  import multiprocessing
  import os
  import warnings
  from logging import Logger
  from queue import Empty
  from threading import Thread
  from typing import Any, Dict, List, Optional, Tuple, Union
  from lightning.data.streaming.config import ChunksConfig
  from lightning.data.streaming.constants import _TORCH_GREATER_EQUAL_2_1_0
  from lightning.data.streaming.item_loader import BaseItemLoader, PyTreeLoader
  from lightning.data.streaming.sampler import ChunkedIndex
  from lightning.data.streaming.serializers import Serializer, _get_serializers
  from lightning.data.utilities.env import _DistributedEnv, _WorkerEnv
label_desc: Use image node_id 3 for calling the PrepareChunksThread obj's underlying member method code with example usage: obj.delete(chunk_indexes) without return types