def get_first_list_item_id(self, list_tree):
        for item in list_tree.iter("li"):
            return item.attrib["id"]
        return None
Like `get_last_list_item_id`, but the first item in the list.
dataset/ETHPy150Open quip/quip-api/python/quip.py/QuipClient.get_first_list_item_id