new_contents: # Chap07/blogs_rss_get_posts.py
  import json
  from argparse import ArgumentParser
  import feedparser
  
  
  def get_parser():
      parser = ArgumentParser()
      parser.add_argument('--rss-url')
      parser.add_argument('--json')
      return parser
  
  
  if __name__ == '__main__':
      parser = get_parser()
      args = parser.parse_args()
  
      feed = feedparser.parse(args.rss_url)
      if feed.entries:
          with open(args.json, 'w') as f:
              for item in feed.entries:
                  f.write(json.dumps(item)+"\n")
subject: Add minimal feed sourcing example