使用 python Xpath 删除换行符和空格解析 XML

Question

这是 xml 文件 http://www.diveintopython3.net/examples/feed.xml

我的代码是

我的结果是

我的问题是

如何去除文中的\n及后面的白色space
如何获取文本为"dive into mark"的节点，如何查找文本语法

Answer 1

只需在每个节点上调用 normalize-space(.)。

import lxml.etree as et

xml = et.parse("feed.xml")
ns = {"ns": 'http://www.w3.org/2005/Atom'}
for n in xml.xpath("//ns:category", namespaces=ns):
    t  = n.xpath("./../ns:summary", namespaces=ns)[0]
    print(t.xpath("normalize-space(.)"))

输出：

Putting an entire chapter on one page sounds bloated, but consider this &mdash; my longest chapter so far would be 75 printed pages, and it loads in under 5 seconds&hellip; On dialup.
Putting an entire chapter on one page sounds bloated, but consider this &mdash; my longest chapter so far would be 75 printed pages, and it loads in under 5 seconds&hellip; On dialup.
Putting an entire chapter on one page sounds bloated, but consider this &mdash; my longest chapter so far would be 75 printed pages, and it loads in under 5 seconds&hellip; On dialup.
The accessibility orthodoxy does not permit people to question the value of features that are rarely useful and rarely used.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.
These notes will eventually become part of a tech talk on video encoding.

您的所有换行符都已删除，多个 space 替换为单个 space。

你的问题的第二部分要求 title 标签，因为这是唯一包含你要查找的文本的标签，但要专门找到包含该确切文本的标题，就是：

xml.xpath("//ns:title[text()='dive into mark']", namespaces=ns)

如果您想要任何包含文本的节点，只需将 ns:title 替换为通配符：

xml.xpath("//*[text()='dive into mark']", namespaces=ns)

使用 python Xpath 删除换行符和空格解析 XML

remove newline and whitespace parse XML with python Xpath

python

xml

xpath

newline