code: def find_external_urls(self, entry):
          
          soup = BeautifulSoup(entry.html_content, 'html.parser')
          external_urls = [a['href'] for a in soup.find_all('a')
                           if self.is_external_url(
                               a['href'], self.ressources.site_url)]
          return external_urls
docs: Find external URLs in an entry.