擅长:python、mysql、java
<p>您可以打开html源代码来找到您要查找的确切类。例如,要获取页面上遇到的第一个StackOverflow用户名,可以执行以下操作:</p>
<pre><code>#!/usr/bin/env python
from lxml import html
url = 'http://stackoverflow.com/questions/4710307'
tree = html.parse(url)
path = '//div[@class="user-details"]/a[@href]'
print tree.findtext(path)
# -> Parseltongue
# OR to print text including the text in children
a = tree.find(path)
print a.text_content()
# -> Parseltongue
</code></pre>