class_docstr: Provide methods to access metadata for :class:`ILSVRC12` dataset.
class_docstr_tok: ["Provide","methods","to","access","metadata","for",":","class",":","`","ILSVRC12","`","dataset","."]
code: def _download_caffe_meta(self):
      fpath = download(
          CAFFE_ILSVRC12_URL[0],
          self.dir,
          expect_size=CAFFE_ILSVRC12_URL[1],
      )
      tarfile.open(fpath, "r:gz").extractall(self.dir)
  
imports: import numpy
  import os
  import tarfile
  import tqdm
  from pathlib import Path
  from ...utils import logger
  from ...utils.fs import download, get_dataset_path, mkdir_p
  from ...utils.loadcaffe import get_caffe_pb
  from ...utils.timer import timed_operation
  from ..base import RNGDataFlow
label_desc: Use image node_id 4 for calling the ILSVRCMeta obj's underlying member method code with example usage: obj._download_caffe_meta() without return types