code: def update(self, title, unsubscribe_page, confirmed_opt_in,
                 confirmation_success_page, unsubscribe_setting="AllClientLists",
                 add_unsubscribes_to_supp_list=False, scrub_active_with_supp_list=False):
          
          body = {
              "Title": title,
              "UnsubscribePage": unsubscribe_page,
              "ConfirmedOptIn": confirmed_opt_in,
              "ConfirmationSuccessPage": confirmation_success_page,
              "UnsubscribeSetting": unsubscribe_setting,
              "AddUnsubscribesToSuppList": add_unsubscribes_to_supp_list,
              "ScrubActiveWithSuppList": scrub_active_with_supp_list}
          response = self._put("/lists/%s.json" % self.list_id, json.dumps(body))
docs: Updates this list.