xpath - python怎么用lxml处理

Question

例如：

<p>
没
<em><!--red_beg-->aa<!--red_end--></em>
</p>
<p>
没
<em><!--red_beg-->aa<!--red_end--></em>
没
<em><!--red_beg-->aa<!--red_end--></em>
</p>
<p>
没
</p>

就是在p标签里可能会出现同样的em标签，而且数量不定，那我怎么获取p的内容，包括em里的内容。
例如第二个p获取输出是‘没aa没aa’

或者获取到p节点之后，怎么把里面的内容转换为字符串

Answer 1

I accidentally learned how to deal with this problem today, so I came up with this question to answer it. Questioner, you can look at the axis of xpath, for example, if you want to get the second <p>标签的“没aa没aa”，实际是取得它全部后代节点的文本内容，可以使用
element_dom.xpath("//p[2]//descendant::text()")来取得，拿到的结果是一个这样['没', 'aa', '没', 'aa']的list,然后自己手动拼接成字符串就可以了，比如"".join(list). Similarly, if you need to perform other operations, you can also use similar methods.

Answer 2

Change to bs4, the similarities and differences between string and text are here.

Answer 3

The

method of .text_content()lxml.html can get the text content of the current node and all child nodes.