解析xml类型文件

Question

我有一个 xml 类型的文档：<configuration>    <appSettings>        <add key="title" value="Donny" />        <add key="updaterApplication" value="Updater v4.3" />    </appSettings></configuration>我需要修改一个特定的条目，例如value="Updater v4.3"to value="Updater v4.4"，当 add 时key="updaterApplication"。我试过：import xml.etree.ElementTree as ETtree = ET.parse(my_file_name)root = tree.getroot()tkr_itms = root.findall('appSettings')for elm in tkr_itms[0]:    print(elm)    print(elm.attributes)    print(elm.value)    print(elm.text)但无法解决'< ... />'.

Answer 1

我看到你发现“'< ... />' 之间的内容”是属性。

迭代add元素并检查key属性值的另一种方法是检查谓词中的属性值。

例子...

蟒蛇

import xml.etree.ElementTree as ET

tree = ET.parse("my_file_name")

root = tree.getroot()

root.find('appSettings/add[@key="updaterApplication"]').attrib["value"] = "Updater v4.4"

print(ET.tostring(root).decode())

输出

<configuration>

    <appSettings>

        <add key="title" value="Donny" />

        <add key="updaterApplication" value="Updater v4.4" />

    </appSettings>

</configuration>

Answer 2

没关系...：

import xml.etree.ElementTree as ET

tree = ET.parse(my_file_name)

root = tree.getroot()

for elm in root.iter('add'):

    if elm.attrib['key']=='updaterApplication':

        elm.attrib['value'] = 'Updater v4.4'

    print(elm.attrib)