如何在 python 中的给定 XML 标签下添加新条目

How to add a new entry under a given XML tag in python

我需要修改 python 中的一个 xml 文件;具体来说,我需要在 video 标签下添加一个新条目。例如,有这样的东西

<sources>
    <programs>
        <default pathversion="1"></default>
    </programs>
    <video>
        <default pathversion="1"></default>
        <source>
            <name>Dir 1</name>
            <path pathversion="1">/path/to/dir1/</path>
            <allowsharing>true</allowsharing>
        </source>
        <source>
            <name>Dir 2</name>
            <path pathversion="1">/path/to/dir2/</path>
            <allowsharing>true</allowsharing>
        </source>
    </video>
    <music>
        <default pathversion="1"></default>
    </music>
    <pictures>
        <default pathversion="1"></default>
    </pictures>
</sources>

我需要在 <video>...</video> 下创建一个新条目,如下所示:

<source>
    <name>Dir 3</name>
    <path pathversion="1">/path/to/dir3/</path>
    <allowsharing>true</allowsharing>
</source>

并更新原始 xml 文件。这样做的最佳做法是什么?

使用xml.etree.ElementTree插入。

import xml.etree.ElementTree as ET

tree = ET.parse('sample.xml')

root = tree.getroot()
insertLoc = root.findall("./video")[0]
start1 = ET.Element(insertLoc)
insSource = ET.SubElement(start1, "source")
insName = ET.SubElement(insSource, "name")
insName.text = "Dir 3"
insPath = ET.SubElement(insSource, "path")
insPath.attrib = {'pathversion':"1"}
insPath.text = "/path/to/dir3/"
insAllow = ET.SubElement(insSource, "allowsharing")
insAllow.text="true"

insertLoc.append(insSource)

print(ET.dump(tree))