code: def __init__(self):
      self.source_tar_filename = "one_shot_backgrounds.sarray.tar"
      self.destination_tar_filename = "one_shot_backgrounds.sarray.tar"
      self.destination_sarray_filename = "one_shot_backgrounds.sarray"
      self.destination_sarray_path = _os.path.join(
          _get_cache_dir("data"), self.destination_sarray_filename
      )
      self.sarray_url = _urlparse.urljoin(
          DATA_URL_ROOT, self.source_tar_filename
      )
      self.sarray_url_md5_pairs = [
          (self.sarray_url, "08830e90771897c1cd187a07cdcb52b4")
      ]
  
      self.extracted_file_to_md5 = {
          "dir_archive.ini": "160fe6e7cb81cb0a29fd09239fdb2559",
          "m_d761047844237e5d.0000": "d29b68f8ba196f60e0ad115f7bfde863",
          "m_d761047844237e5d.sidx": "22b0c297aabb836a21d3179c05c9c455",
          "objects.bin": "d41d8cd98f00b204e9800998ecf8427e",
      }
  
file_path: turicreate/src/python/turicreate/toolkits/_data_zoo.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import os
  import turicreate
  import shutil
  import tarfile
  from six.moves.urllib import parse
  from ._pre_trained_models import _download_and_checksum_files
  from ._pre_trained_models import _get_cache_dir
label_desc: Use image node_id 1 to create a new OneShotObjectDetectorBackgroundData object from inherited base classes: object with example: obj = OneShotObjectDetectorBackgroundData()