我有工作样本, 以给定的 href 生成 html 元素列表。 但我只需要第一个, 速度很重要, 如何优化这个代码?
import lxml.html
input = """<div class="post" style="height: 36px; ">
some div text
<a href="http://site.com/" target="_blank">Look here</a>,
some div text also </div>
"""
root = lxml.html.fromstring(input)
el = root.xpath("//*[@href= http://site.com/ ]")[0]
el.text
您可以在您的 xpath 表达式中使用索引 : (//* [@href= http://site.com/]) [1]
唯一能确保它真正更快的方法是测量、测量、测量。 可以帮助。
回到你的问题,这样如何?
text = root.xpath( //*[@href= http://site.com/ ][1]/text() )
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