code: def add(url, force=False):
      
      if url[-3:] == 'xml' or url[1][-4:] == 'atom':
          print("Added your feed as %s" % str(add_feed(url)))
      elif is_feed(url):
          print("Added your feed as %s" % str(add_feed(url)))
      elif force:
          print("Added your feed as %s" % str(add_feed(url)))
      else:
          print("Hitman doesn't think that url is a feed; if you're sure it is rerun with --force")
docs: Add a atom or RSS feed by url.
      If it doesn't end in .atom or .rss we'll do some guessing.