code: def disk_usage(path):
      total = _file_size(path)
      for root, dirs, names in os.walk(path, followlinks=False):
          for name in dirs + names:
              path = os.path.join(root, name)
              total += _file_size(os.path.join(root, name))
      return total
  
imports: import fnmatch
  import glob
  import logging
  import os
  import re
  import shutil
  from guild import util
label_desc: Use image node_id 15 for calling a global function with example usage: disk_usage(path) and returns: total