day07_xml模块学习03

#__author__ = 'DouYunQian'

 # coding=utf-8

 from xml.etree import ElementTree as t

 f=open("C:\Jv\day07\src\Data\learn.xml", mode='r').read()

 d=t.XML(f)

 #print(c.tag)#这种方法不用getroot（）而是直接读取的就是根节点


 for c in d.iter("year"):#该方法获取所有子节点的year并做成可迭代对象

     print(c.tag," ",c.attrib," ",c.text)

     new_year=int(c.text)+1

     c.text=str(new_year)#改变节点的文本值

     #设置属性

     c.set("name","Alex")

     c.set("age","20")

     del c.attrib["name"]

 tree=t.ElementTree(d)#得到一个ElementTree对象，

 tree.write("newLean.xml",encoding="utf-8")#然后就可以写入文件