def _last_index(self, s):
        self.set_index(max(0, self._find_one_after_last_labeled_index() - 1))
def step_impl(context):
    data = json.loads(context.text)
    receiver_name = re.match(r"\<(\w+)'s id\>", data['receiver']).group(1)
    data['receiver'] = context.users[receiver_name]['id']
    context.request.add_data(data)