code: def get_padding(key_length, max_length=100):
      pad = ""
      for padding_size in range(1, max_length):
          if tf.math.equal(padding_size, max_length - key_length):
              pad = padding_size * "#"
      return pad
  
file_path: scenic/scenic/projects/svvit/datasets/pileup_window_dataset.py
imports: import functools
  from typing import Optional, Dict, Tuple
  from absl import logging
  from flax import jax_utils
  import jax
  import jax.numpy
  import numpy
  from scenic.dataset_lib import dataset_utils
  from scenic.dataset_lib import datasets
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: get_padding(key_length, max_length) and returns: pad