code: def read_png(filename):
      """Loads a PNG image file."""
      string = tf.io.read_file(filename)
      return tf.image.decode_image(string, channels=3)
  
imports: import argparse
  import functools
  import glob
  import sys
  from absl import app
  from absl.flags import argparse_flags
  import tensorflow
  import tensorflow_compression
  import tensorflow_datasets
label_desc: Use image node_id 1 for calling a global function with example usage: read_png(filename) and returns: tf