code: def _is_cmyk(filename: str) -> bool:
      """
      Determines if file contains a CMYK JPEG format image.
  
      Args:
      filename: string, path of the image file.
  
      Returns:
      boolean indicating if the image is a JPEG encoded with CMYK color space.
  
      """
      # File list from:
      # https://github.com/cytsai/ilsvrc-cmyk-image-list
      blacklist = set(
          [
              "n01739381_1309.JPEG",
              "n02077923_14822.JPEG",
              "n02447366_23489.JPEG",
              "n02492035_15739.JPEG",
              "n02747177_10752.JPEG",
              "n03018349_4028.JPEG",
              "n03062245_4620.JPEG",
              "n03347037_9675.JPEG",
              "n03467068_12171.JPEG",
              "n03529860_11437.JPEG",
              "n03544143_17228.JPEG",
              "n03633091_5218.JPEG",
              "n03710637_5125.JPEG",
              "n03961711_5286.JPEG",
              "n04033995_2932.JPEG",
              "n04258138_17003.JPEG",
              "n04264628_27969.JPEG",
              "n04336792_7448.JPEG",
              "n04371774_5854.JPEG",
              "n04596742_4225.JPEG",
              "n07583066_647.JPEG",
              "n13037406_4650.JPEG",
          ]
      )
      return os.path.basename(filename) in blacklist
  
imports: from datetime import datetime
  import math
  import os
  import random
  from typing import Iterable, List, Mapping, Union, Tuple
  import sys
  import threading
  import numpy
  import tensorflow
label_desc: Use image node_id 10 for calling a global function with example usage: _is_cmyk(filename) and returns: unknown