如何在 python 中的给定 XML 标签下添加新条目

Question

I need to modify an xml file in python; specifically I need to add a new entry under the video tag. For instance, having something like this

<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>

I need to create a new entry under <video>...</video> as follows:

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

and update the original xml file. What would be the best practice to do so?

Answer 1

Using xml.etree.ElementTree to insert.

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))