code: def url_mod(url: str, new_params: dict) -> str:
      
      from urllib.parse import urlparse, parse_qsl, urlunparse, urlencode
      res = urlparse(url)
      query_params = dict(parse_qsl(res.query))
      for k, v in new_params.items():
          if v is None:
              query_params[str(k)] = ''
          else:
              query_params[str(k)] = str(v)
      parts = list(res)
      parts[4] = urlencode(query_params)
      return urlunparse(parts)
docs: Modifies existing URL by setting/overriding specified query string parameters.
      Note: Does not support multiple querystring parameters with identical name.
      :param url: Base URL/path to modify
      :param new_params: Querystring parameters to set/override (dict)
      :return: New URL/path