Python Refactoring/Testing Interview Question

interview.py

# This script requests the RSS feed for phoronix.com and outputs the latest
# news items into a CSV file.

#
# It is not particularly well written, and if it were part of a real project,
# it would be awkward to test in an automated way.
#   
#   How would you refactor (change) this code to make it more testable for fuzzing or unit testing?
#

import csv
import requests
import xml.etree.ElementTree as ET
  
url = 'https://www.phoronix.com/rss.php'
resp = requests.get(url)
with open('topnewsfeed.xml', 'wb') as f:
    f.write(resp.content)

# create element tree object
tree = ET.parse("topnewsfeed.xml")
  
# get root element
root = tree.getroot()
  
# create empty list for news items
newsitems = []
  
# iterate news items
for item in root.findall('./channel/item'):
    # empty news dictionary
    news = {}
  
    # iterate child elements of item
    for child in item:
  
        # special checking for namespace object content:media
        if child.tag == '{http://search.yahoo.com/mrss/}content':
            news['media'] = child.attrib['url']
        else:
            news[child.tag] = child.text.encode('utf8')
  
    # append news dictionary to news items list
    newsitems.append(news)

# specifying the fields for csv file
fields = ['guid', 'title', 'pubDate', 'description', 'link', 'media']
  
# writing to csv file
with open('output.csv', 'w') as csvfile:
  
    # creating a csv dict writer object
    writer = csv.DictWriter(csvfile, fieldnames = fields)
  
    # writing headers (field names)
    writer.writeheader()
  
    # writing data rows
    writer.writerows(newsitems)