如何使用python和lxml中的for循环从网站链接列表中检索页面内容？

pip install lxml

import requests
from lxml import etree

def retrieve_content(url_list):
    for url in url_list:
        response = requests.get(url)
        if response.status_code == 200:
            html = response.text
            # 使用lxml解析HTML
            tree = etree.HTML(html)
            # 在这里可以使用XPath表达式来提取所需的内容
            # 例如，提取所有的标题
            titles = tree.xpath('//h1/text()')
            for title in titles:
                print(title)
        else:
            print(f"Failed to retrieve content from {url}")

url_list = ['https://www.example.com/page1', 'https://www.example.com/page2']
retrieve_content(url_list)