python实现修改xml文件内容

<data>
<country name="Liechtenstein">
<rank>yunweijia</rank>
<year>2022</year>
<gdppc>141100</gdppc>
<neighbor name="Austria" direction="E" />
<neighbor name="Switzerland" direction="W" />
</country>
<country name="Singapore">
<rank>yunweijia</rank>
<year>2023</year>
<gdppc>59900</gdppc>
<neighbor name="Malaysia" direction="N" />
</country>
<country name="Panama">
<rank>yunweijia</rank>
<year>2024</year>
<gdppc>13600</gdppc>
<neighbor name="Costa Rica" direction="W" />
<neighbor name="Colombia" direction="E" />
</country>
</data>

import xml.etree.ElementTree as ET
def change_one_xml(xml_path, xml_dw, update_content):
# 打开xml文档
doc = ET.parse(xml_path)
root = doc.getroot()
# 查找修改路劲
sub1 = root.find(xml_dw)
# 修改标签内容
sub1.text = update_content
# 保存修改
doc.write(xml_path)

# 欲修改文件
xml_path = r'test.xml'

# 修改文件中的xpath定位
xml_dw = './/country[@name="Singapore"]/year'

# 想要修改成什么内容
update_content = '9999'
change_one_xml(xml_path, xml_dw, update_content)

<data>
<country name="Liechtenstein">
<rank>yunweijia</rank>
<year>2022</year>
<gdppc>141100</gdppc>
<neighbor name="Austria" direction="E" />
<neighbor name="Switzerland" direction="W" />
</country>
<country name="Singapore">
<rank>yunweijia</rank>
<year>9999</year>
<gdppc>59900</gdppc>
<neighbor name="Malaysia" direction="N" />
</country>
<country name="Panama">
<rank>yunweijia</rank>
<year>2024</year>
<gdppc>13600</gdppc>
<neighbor name="Costa Rica" direction="W" />
<neighbor name="Colombia" direction="E" />
</country>
</data>