如何使用lxml.html text_content（）或等效内容保留<br/>作为换行符？

Question

我希望在从lxml元素中提取文本内容时将<br>标记保留为\n。

示例代码：

fragment = '<div>This is a text node.<br/>This is another text node.<br/><br/><span>And a child element.</span><span>Another child,<br> with two text nodes</span></div>'

h = lxml.html.fromstring(fragment)

输出：

> h.text_content()
'This is a text node.This is another text node.And a child element.Another child, with two text nodes'

Answer 1

将\n字符添加到每个<br />元素的尾部应该会给出您期望的结果：

>>> import lxml.html as html
>>> fragment = '<div>This is a text node.<br/>This is another text node.<br/><br/><span>And a child element.</span><span>Another child,<br> with two text nodes</span></div>'
>>> doc = html.document_fromstring(fragment)
>>> for br in doc.xpath("*//br"):
        br.tail = "\n" + br.tail if br.tail else "\n"

>>> doc.text_content()
'This is a text node.\nThis is another text node.\n\nAnd a child element.Another child,\n with two text nodes'
>>> fragment
'<div>This is a text node.<br/>This is another text node.<br/><br/><span>And a child element.</span><span>Another child,<br> with two text nodes</span></div>'