code: def __init__(self) -> None:
      self._opened_for_scan = False
      self._fp: Optional["IO[Any]"] = None
      self._index = 0
      self._flush_offset = 0
      self._size_bytes = 0
  
      self._crc = [0] * (LEVELDBLOG_LAST + 1)
      for x in range(1, LEVELDBLOG_LAST + 1):
          self._crc[x] = zlib.crc32(strtobytes(chr(x))) & 0xFFFFFFFF
  
      assert (
          wandb._assert_is_internal_process  # type: ignore
      ), "DataStore can only be used in the internal process"
  
imports: import logging
  import os
  import struct
  import zlib
  from typing import TYPE_CHECKING, Optional, Tuple
  import wandb
label_desc: Use image node_id 1 to create a new DataStore object  with example: obj = DataStore()