python - 如何使用ElementTree在python中添加xml节点

Question

我有像这样的 xml 文件

<data>
<person>
    <Name>xyz</Name>   
    <add>abc</add>   
</person>
</data>

我想添加另一个人节点，如

<data>
<person>
    <Name>xyz</Name>
    <add>abc</add>
</person>
<person>
    <Name>def</Name>
</person>
</data>

我当前的python代码是

import xml.etree.ElementTree as ET   
from xml.etree.ElementTree import Element    
from xml.etree.ElementTree import ElementTree    

root = ET.parse("Lexicon.xml").getroot()    
creRoot = Element("person")

creDictionary = Element("Name")    
creDictionary.text = "def"    
creRoot.append(creDictionary)    
print(ET.tostring(creRoot))   
creTree= ElementTree(creRoot)   
creTree.write("Lexicon.xml")   

当我运行此代码时，它将创建 xml 文件而不是添加，结果是

<person>
    <Name>def</Name>
</person>

它将删除所有以前的数据..
请任何可以解决它的人..提前致谢

Answer 1

SubElement 应用于向现有节点添加节点:

import xml.etree.ElementTree as etree

data = etree.XML(input)
person = etree.SubElement(data, 'person')
name = etree.SubElement(person, 'Name')    
name.text = 'def'    
print(etree.tostring(data))