code: def input_preprocess(image, label):
      image = tf.keras.applications.resnet50.preprocess_input(image)
      return image, label
  
file_path: cloud/src/python/tensorflow_cloud/core/tests/examples/call_run_within_script_with_keras_fit.py
imports: import datetime
  import os
  import matplotlib.pyplot
  import numpy
  import tensorflow
  import tensorflow_cloud
  import tensorflow_datasets
  from tensorflow import keras
  from tensorflow.keras import layers
  from tensorflow.keras.models import Model
label_desc: Use image node_id 1 for calling a global function with example usage: input_preprocess(image, label) and returns: image,  label