code: def create_padding_mask(seq):
      """
      create padding mask
      """
      seq = tf.cast(tf.math.equal(seq, 0), tf.float32)
      return seq[:, tf.newaxis, tf.newaxis, :]
  
file_path: delta/delta/layers/utils_tf.py
imports: import math
  import numpy
  import tensorflow
  from tensorflow.python.util import nest
label_desc: Use image node_id 12 for calling a global function with example usage: create_padding_mask(seq) and returns: seq