code: def _ensure_url_has_path(self, url):
          
          inx = url.find('://')
          if inx > 0:
              rest = url[inx + 3:]
          elif url.startswith('//'):
              rest = url[2:]
          else:
              rest = url
  
          if '/' in rest:
              return url
  
          scheme, netloc, path, query, frag = urlsplit(url)
          if not path:
              path = '/'
  
          url = urlunsplit((scheme, netloc, path, query, frag))
          return url
docs: ensure the url has a path component
          eg. http://example.com#abc converted to http://example.com/#abc