code: def prepare_file_system():
      # Set up the directory we'll write summaries to for TensorBoard
      if tf.gfile.Exists(FLAGS.summaries_dir):
          tf.gfile.DeleteRecursively(FLAGS.summaries_dir)
      tf.gfile.MakeDirs(FLAGS.summaries_dir)
      if FLAGS.intermediate_store_frequency > 0:
          ensure_dir_exists(FLAGS.intermediate_output_graphs_dir)
      return
  
imports: from absl import logging
  import argparse
  import collections
  from datetime import datetime
  import hashlib
  import os.path
  import random
  import re
  import sys
  import numpy
  import tensorflow
  import tensorflow_hub
  from tensorflow.contrib import quantize
label_desc: Use image node_id 20 for calling a global function with example usage: prepare_file_system() without return types