code: def _cache_opener(self, path: Path, size: int) -> "Opener":
      @contextlib.contextmanager
      def helper(mode: str = "w") -> Generator[IO, None, None]:
          if "a" in mode:
              raise ValueError(
                  "Appending to cache files is not supported"
              )
  
          self._reserve_space(size)
          temp_file = NamedTemporaryFile(
              dir=self._temp_dir, mode=mode, delete=False
          )
          try:
              yield temp_file
              temp_file.close()
              os.chmod(temp_file.name, 0o666 & ~self._sys_umask)
              path.parent.mkdir(parents=True, exist_ok=True)
              os.replace(temp_file.name, path)
          except Exception:
              os.remove(temp_file.name)
              raise
  
      return helper
  
imports: import contextlib
  import errno
  import hashlib
  import os
  import shutil
  import subprocess
  import sys
  from pathlib import Path
  from tempfile import NamedTemporaryFile
  from typing import IO, TYPE_CHECKING, ContextManager, Generator, Optional, Tuple
  import wandb
  from wandb import env, util
  from wandb.errors import term
  from wandb.sdk.lib.filesystem import files_in
  from wandb.sdk.lib.hashutil import B64MD5, ETag, b64_to_hex_id
  from wandb.sdk.lib.paths import FilePathStr, StrPath, URIStr
label_desc: Use image node_id 8 for calling the ArtifactFileCache obj's underlying member method code with example usage: obj._cache_opener(path, size) and returns: helper