new_contents: import os
  import sys
  try:
      directory = sys.argv[1]
  except IndexError:
      sys.exit("Must provide an argument")
  
  dir_size = 0
  fsizedicr = {
      'Bytes': 1,
      'Kilobytes': float(1) / 1024,
      'Megabytes': float(1) / (1024 * 1024),
      'Gigabytes': float(1) / (1024 * 1024 * 1024)
  }
  
  for (path, dir, files) in os.walk(directory):
      for file in files:
          filename = os.path.join(path, file)
          print(filename)
          dir_size += os.path.getsize(filename)
  
  fsizeList = [str(round(fsizedicr[key] * dir_size, 2)) + " " + key for key in fsizedicr]
  
  if dir_size == 0: 
      print("File Empty")
  else:
      for units in sorted(fsizeList)[::-1]:
          print("Folder Size: " + units)
  
subject: Add folder_size