在 Python 中更改 XML 值

Question

如果我有一个如下所示的 XML 文件，我如何将版本从 50 更改为 51？

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <updateCheck seconds="2" />
    <unturnedVersion version="50" />
    <unturnedFolder recoveryBundlesAfterUpdates="false" />
    <rocket useRocket="true" apikey=""/>
    <steam username="" password="" />
    <steamUpdates validate="true" />
    <servers rconEnabled="false">
        <server name="server1" rconPort="27013" rconPassword="pass" />
        <server name="server2" rconPort="27014" rconPassword="pass" />
    </servers>
    <notifyBefore seconds="60" />
</config>

我已经尝试了多种方法来做到这一点，有些方法没有做任何事情，或者它只是在代码底部创建了一个新版本的 unturnedVersion 51。我只想将 50 更改为 51 或我设置的任何其他值。

谢谢！

Answer 1

使用xml.etree.ElementTree. 定位元素，例如，通过元素的字典find()更新version属性：.attrib

import xml.etree.ElementTree as ET

data = """<?xml version="1.0" encoding="UTF-8"?>
<config>
    <updateCheck seconds="2" />
    <unturnedVersion version="50" />
    <unturnedFolder recoveryBundlesAfterUpdates="false" />
    <rocket useRocket="true" apikey=""/>
    <steam username="" password="" />
    <steamUpdates validate="true" />
    <servers rconEnabled="false">
        <server name="server1" rconPort="27013" rconPassword="pass" />
        <server name="server2" rconPort="27014" rconPassword="pass" />
    </servers>
    <notifyBefore seconds="60" />
</config>"""

root = ET.fromstring(data)
unturned_version = root.find("unturnedVersion")
unturned_version.attrib["version"] = "51"

print(ET.tostring(root))

印刷：

<config>
    <updateCheck seconds="2" />
    <unturnedVersion version="51" />
    <unturnedFolder recoveryBundlesAfterUpdates="false" />
    <rocket apikey="" useRocket="true" />
    <steam password="" username="" />
    <steamUpdates validate="true" />
    <servers rconEnabled="false">
        <server name="server1" rconPassword="pass" rconPort="27013" />
        <server name="server2" rconPassword="pass" rconPort="27014" />
    </servers>
    <notifyBefore seconds="60" />
</config>

请注意，如果要增加现有版本，请使用：

unturned_version.attrib["version"] = str(int(unturned_version.attrib["version"]) + 1)

而且，如果您从文件中读取 XML，请使用ET.parse()：

import xml.etree.ElementTree as ET


tree = ET.parse("input.xml")
root = tree.getroot()
unturned_version = root.find("unturnedVersion")
unturned_version.attrib["version"] = str(int(unturned_version.attrib["version"]) + 1)

print(ET.tostring(root))