code: def _check_pil():
      if not pil:
          raise ImportError(
              "Failed to import PIL. You must install Pillow"
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  import os
  import tempfile
  import math
  import json
  import six
  import numpy
  import matplotlib.font_manager
  from skimage import io, transform
  from keras import backend
  from keras.models import load_model
  import logging
label_desc: Use image node_id 1 for calling a global function with example usage: _check_pil() without return types