old_contents: """A script for parsing the Imagenet bounding box XML files."""
  
  import sys
  import os
  import itertools
  import xml.etree.ElementTree as ET 
  
  def parse_file(bbox_dir, filepath): 
      tree = ET.parse(bbox_dir + filepath)
      root = tree.getroot()
  
      output_lst = []
      size_node = root.find('size')
      width = size_node.find('width').text
      height = size_node.find('height').text
  
      for child in root.findall('./'): 
          if child.tag == "object": 
              object_lst = []
              object_lst.append(width)
              object_lst.append(height)
              name = child.find('name').text
              subcategory = child.find('subcategory')
              subcategory = None if subcategory is None else subcategory.text
  
              bounding_box = child.find('bndbox')
              xmin = bounding_box.find('xmin').text
              xmax = bounding_box.find('xmax').text
              ymin = bounding_box.find('ymin').text
              ymax = bounding_box.find('ymax').text
  
              object_lst.append(name)
              object_lst.append(subcategory)
              object_lst.append(xmin)
              object_lst.append(xmax)
              object_lst.append(ymin)
              object_lst.append(ymax)
              output_lst.append(object_lst)
  
      return output_lst
      
  if __name__ == '__main__': 
      bbox_dir = sys.argv[1]
      xml_files_by_dir = (i[2] for i in os.walk(bbox_dir))
      bbox_xml_filenames = itertools.chain(*xml_files_by_dir)
  
      end_lst = []
      for filename in bbox_xml_filenames: 
          end_lst.extend(parse_file(bbox_dir, filename))
      # parsed_results = [parse_file(bbox_dir, filename) for \
      #      filename in bbox_xml_filenames]
  
  
  
new_contents: """A script for parsing the Imagenet bounding box XML files."""
  
  import sys
  import os
  import itertools
  import xml.etree.ElementTree as ET 
  
  def parse_file(bbox_dir, filename): 
      """Parse an individual XML file and grab the relevant elements. 
  
      Args: 
      ----
          bbox_dir: str
              Holds the directory path to the XML file. 
          filename: str
              Holds the name of the XML file. To be attached to the 
              `bbox_dir` to be read in and parsed. 
  
      Output: 
      ------
          output_lst: list of lists 
              Holds lists of the values parsed from an XML file. 
      """
      tree = ET.parse(bbox_dir + filepath)
      root = tree.getroot()
  
      output_lst = []
      size_node = root.find('size')
      width = size_node.find('width').text
      height = size_node.find('height').text
  
      for child in root.findall('./'): 
          if child.tag == "object": 
              object_lst = []
              object_lst.append(width)
              object_lst.append(height)
              name = child.find('name').text
              subcategory = child.find('subcategory')
              subcategory = None if subcategory is None else subcategory.text
  
              bounding_box = child.find('bndbox')
              xmin = bounding_box.find('xmin').text
              xmax = bounding_box.find('xmax').text
              ymin = bounding_box.find('ymin').text
              ymax = bounding_box.find('ymax').text
  
              object_lst.append(name)
              object_lst.append(subcategory)
              object_lst.append(xmin)
              object_lst.append(xmax)
              object_lst.append(ymin)
              object_lst.append(ymax)
              output_lst.append(object_lst)
  
      return output_lst
      
  if __name__ == '__main__': 
      bbox_dir = sys.argv[1]
      xml_files_by_dir = (i[2] for i in os.walk(bbox_dir))
      bbox_xml_filenames = itertools.chain(*xml_files_by_dir)
  
      end_lst = []
      for filename in bbox_xml_filenames: 
          end_lst.extend(parse_file(bbox_dir, filename))
  
  
  
subject: Add docstring to main function