如何将xml数据转换成csv文件？

import csv
import xml.etree.ElementTree as ET

def xml_to_csv(xml_file, csv_file):
    tree = ET.parse(xml_file)
    root = tree.getroot()

    with open(csv_file, 'w', newline='') as file:
        writer = csv.writer(file)

        # 写入CSV表头
        headers = ['Column1', 'Column2', 'Column3']  # 替换为实际的字段名
        writer.writerow(headers)

        # 遍历XML树并提取数据写入CSV文件
        for item in root.findall('Item'):
            column1 = item.find('Column1').text
            column2 = item.find('Column2').text
            column3 = item.find('Column3').text

            writer.writerow([column1, column2, column3])  # 替换为实际的字段值

# 调用函数进行转换
xml_to_csv('input.xml', 'output.csv')