python怎么使用xpath获取标签属性？

Question

python怎么使用xpath获取标签属性

Answer 1

先导入包
from lxml import etree
然后
tree=etree.HTML(detailHtml)
detailHtml是网页内容

dataNoteList=tree.xpath(u'//td')

td 表示标记名称

Answer 2

XPath='//*[@id="j-nav-menu-container"]/div/div/div/div/div/div[2]/div[1]/a/@href'
获得a标签的href
XPath='//*[@id="j-nav-menu-container"]/div/div/div/div/div/div[2]/div[1]/a/text()'
获得a标签内容

Answer 3

response.xpath('//h3/a/descendant-or-self::text()[normalize-space()]')
descendant-or-self表明当前node和子代nodes
normal-space()去掉whitespace-only nodes的子代nodes