code: def django_url(step, url=None):
      
  
      base_url = step.test.live_server_url
  
      if url:
          return urljoin(base_url, url)
      else:
          return base_url
docs: The URL for a page from the test server.
  
      :param step: A Gherkin step
      :param url: If specified, the relative URL to append.