如何从列表中动态生成XML？

import xml.etree.ElementTree as ET

def generate_xml_from_list(data_list):
    # 创建根节点
    root = ET.Element("data")

    # 遍历列表中的每个元素
    for item in data_list:
        # 创建子节点
        item_node = ET.SubElement(root, "item")

        # 添加属性
        item_node.set("id", str(item["id"]))

        # 添加子元素
        name_node = ET.SubElement(item_node, "name")
        name_node.text = item["name"]

        age_node = ET.SubElement(item_node, "age")
        age_node.text = str(item["age"])

    # 创建XML文档对象
    xml_tree = ET.ElementTree(root)

    # 保存为XML文件
    xml_tree.write("data.xml", encoding="utf-8", xml_declaration=True)

    # 转换为字符串
    xml_str = ET.tostring(root, encoding="utf-8", method="xml")

    return xml_str

# 测试数据
data_list = [
    {"id": 1, "name": "Alice", "age": 25},
    {"id": 2, "name": "Bob", "age": 30},
    {"id": 3, "name": "Charlie", "age": 35}
]

# 生成XML
xml_data = generate_xml_from_list(data_list)
print(xml_data)