xml模块 增删改查

import xml.etree.ElementTree as ET

tree = ET.parse("xml test") #open
root = tree.getroot() #f.seek(0)
#print(dir(root))
print(root)
#
# #遍历xml文档
for child in root:
    print('----------',child.tag, child.attrib)
    for i in child:
        print(i.tag,i.text)

#只遍历year 节点
for node in root.iter('year'):
    print(node.tag,node.text)

import xml.etree.ElementTree as ET

tree = ET.parse("xml test")
root = tree.getroot() #f.seek(0)


# #修改
# for node in root.iter('year'):
#     new_year = int(node.text) + 1
#     node.text = str(new_year)
#     node.set("attr_test","yes")



#删除node
for country in root.findall('country'):
   rank = int(country.find('rank').text)
   if rank > 50:
     root.remove(country)

tree.write('output.xml')

# _*_coding:utf-8_*_
# created by Alex Li on 10/17/17

import xml.etree.ElementTree as ET


root = ET.Element("namelist") #root

name = ET.SubElement(root,"name",attrib={"enrolled":"yes"})
age = ET.SubElement(name,"age",attrib={"checked":"no"})
sex = ET.SubElement(name,"sex")
n = ET.SubElement(name,"name")
n.text = "Alex Li"
sex.text = 'male'


name2 = ET.SubElement(root,"name",attrib={"enrolled":"no"})
age = ET.SubElement(name2,"age")
age.text = '19'

et = ET.ElementTree(root ) #生成文档对象

et.write("build_out.xml", encoding="utf-8",xml_declaration=True)