有没有一种优雅的方法可以在 python 中使用 lxml 来计算 xml 文件中的标签元素?

2022-01-18 00:00:00 python xml lxml count tags

问题描述

我可以将 xml 文件的内容读取为字符串并使用字符串操作来实现这一点，但我想有一种更优雅的方法可以做到这一点.由于我在文档中没有找到线索，所以我在这里:

I could read the content of the xml file to a string and use string operations to achieve this, but I guess there is a more elegant way to do this. Since I did not find a clue in the docus, I am sking here:

给定一个 xml(见下文)文件，您如何计算 xml 标签，例如 count of author-tags 在下面的示例中，最优雅的方式? 我们假设每个作者只出现一次.

Given an xml (see below) file, how do you count xml tags, like count of author-tags in the example bewlow the most elegant way? We assume, that each author appears exactly once.

<root>
    <author>Tim</author>
    <author>Eva</author>
    <author>Martin</author>
    etc.
</root>

这个xml文件很琐碎，但有可能，作者并不总是一个接一个地列出来，他们之间可能还有其他的标签.

This xml file is trivial, but it is possible, that the authors are not always listed one after another, there may be other tags between them.

解决方案

如果要统计所有作者标签:

If you want to count all author tags:

import lxml.etree
doc = lxml.etree.parse(xml)
count = doc.xpath('count(//author)')

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