首页etree.HTML.xpath（）后面应该接什么参数

etree.HTML.xpath（）后面应该接什么参数

时间: 2023-05-27 20:06:00 浏览: 97

etree.HTML.xpath()应该接XPath表达式作为参数，用于选择HTML文档中的元素。例如： ```python from lxml import etree html = """ <html> <body> <div class="container"> <h1>Heading</h1> <p>Paragraph 1</p> <p>Paragraph 2</p> </div> </body> </html> """ tree = etree.HTML(html) # 选择所有的<p>元素 paragraphs = tree.xpath('//p') print(paragraphs) # 选择class属性为"container"的<div>元素下的所有<p>元素 container_paragraphs = tree.xpath('//div[@class="container"]/p') print(container_paragraphs) # 选择第一个<p>元素的文本内容 first_paragraph = tree.xpath('//p/text()')[0] print(first_paragraph) ```

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