Python :如何将新节追加到现有XML

import xml.etree.ElementTree as ET

tree = ET.parse('existing.xml')
root = tree.getroot()

new_element = ET.Element('new_element')

sub_element = ET.SubElement(new_element, 'sub_element')
sub_element.text = 'Sub element text'

root.append(new_element)

tree.write('modified.xml')

import xml.etree.ElementTree as ET

# 解析现有的XML文件
tree = ET.parse('existing.xml')
root = tree.getroot()

# 创建新的XML元素
new_element = ET.Element('new_element')

# 添加子元素到新的XML元素中
sub_element = ET.SubElement(new_element, 'sub_element')
sub_element.text = 'Sub element text'

# 将新的XML元素追加到现有XML文件的根元素中
root.append(new_element)

# 将修改后的XML内容写入文件
tree.write('modified.xml')