python_xml(三)

from xml.etree import ElementTree as ET
tree = ET.parse("fist.xml")
#~~~~~~~~~~
root = tree.getroot()
for node in root.iter('year'):
    #更改值
    new_year = int(node.text)+1
    node.text = str(new_year)
    #添加属性/更改属性
    node.set('name',"w")
    node.set('age','2')
    #删除属性
    del node.attrib['name']

#写入文件
tree.write("fist.xml")