如何将列表中的项目传递到xpath以从网站下载文件？

import requests
from lxml import etree

# 1. 发送HTTP请求并获取网页内容
url = 'https://example.com'
response = requests.get(url)
html = response.text

# 2. 使用XPath解析HTML内容
tree = etree.HTML(html)

# 3. 定位包含文件下载链接的元素
file_links = tree.xpath('//a[@class="download-link"]/@href')

# 4. 遍历文件下载链接并下载文件
for link in file_links:
    # 5. 下载文件
    file_url = url + link
    file_response = requests.get(file_url)
    file_content = file_response.content

    # 6. 将文件保存到本地
    with open('downloaded_file.txt', 'wb') as file:
        file.write(file_content)