关于vscode 爬虫过程中 xpath 使用的问题
```python
from lxml import etree
import requests
url='https://pic.netbian.com/4kmeinv/'
headers={"User-Agent":'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0'}
page_text=requests.get(url,headers=headers).content
tree = etree.HTML(page_text)
li_list=tree.xpath('//dv[@class="slist"]//li')
for li in li_list:
img_src='https://pic.netbian.com'+li.xpath('./a/img/@src')[0]
img_name=li.xpath('./a/img/@alt')[0]+'.jpg'
print(img_name,img_src)
运行结果是这样的,没有爬取得到想要的链接和名称,希望得到解答