我正在尝试解析此页面的评论:http://www.amazon.co.uk/product-reviews/B00143ZBHY
使用以下方法:
代码
html # a variable which contains exact html as given at the above page.
from lxml import etree
tree = etree.HTML(html)
r = tree.xpath(".//*[@id='productReviews']/tbody/tr/td[1]/div[9]/text()[4]")
print len(r)
print r[0].tag
输出
0
Traceback (most recent call last):
File "c.py", line 37, in <module>
print r[0].tag
IndexError: list index out of range
p,s,: 当在 firefox 的 xpath 检查器插件上使用相同的 xpath 时，我可以很容易地做到这一点。但是这里没有结果，请帮助!
最佳答案
尝试删除 /tbody形式 XPath — 没有 <tbody>在#productReviews .
import urllib2
html = urllib2.urlopen("http://www.amazon.co.uk/product-reviews/B00143ZBHY").read()
from lxml import etree
tree = etree.HTML(html)
r = tree.xpath(".//*[@id='productReviews']/tr/td[1]/div[9]/text()[4]")
print r[0]
输出:
bought this as replacement for the original cover which came with my greenhouse and which ripped in the wind. so far this seems a good replacement although for some reason it seems slightly too small for my greenhouse so that i cant zip both sides of the front at the same time. seems sturdier and thicker than the cover i had before so hoping it lasts a bit longer!
关于python - 无法使用 lxml Xpath 解析器解析 html，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11458902/