不懂就问，这个为什么解析出来是空列表啊
```python
import requests
from lxml import etree
import pprint
url = "https://smx.58.com/shanxiansmx/zufang/"
head = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36 SE 2.X MetaSr 1.0"}
reponse = requests.get(url = url,headers=head)
page = reponse.text
tree = etree.HTML(page)
print(tree)
print("~"*30)
name = tree.xpath("//div[@class='des']/h2/a[class='strongbox']/text()")
print(name)
print("~"*30)
huxing = tree.xpath("//div[@class='des']/h2/p[class='room']/text()")
pprint.pprint(huxing)
print("~"*30)
zujin = tree.xpath("//div[@class='money']/b/text()")
pprint.pprint(zujin)
print("~"*30)
dizhi = tree.xpath("//div[@class='des']/p[@class='infor']/a/text()")
pprint.pprint(dizhi)
print("~"*30)
```