1 import xml.etree.ElementTree as ET
 2 
 3 new_xml=ET.Element('personinfolist')   #最外面的标签名
 4 personinfo=ET.SubElement(new_xml,'personinfo',attrib={'enrolled':'aaa'}) #对应的参数是：父级标签是谁，当前标签名，当前标签属性与值
 5 name=ET.SubElement(personinfo,'name')
 6 name.text='xaoming'
 7 age=ET.SubElement(personinfo,'age',attrib={'checked':'yes'})
 8 age.text='23'
 9 
10 
11 
12 personinfo2=ET.SubElement(new_xml,'personinfo',attrib={'enrolled':'bbb'})
13 name=ET.SubElement(personinfo2,'name')
14 name.text='xaokong'
15 age=ET.SubElement(personinfo2,'age',attrib={'checked':'no'})
16 age.text='20'
17 
18 et=ET.ElementTree(new_xml)
19 et.write('text1.xml',encoding='utf-8',xml_declaration=True)#生成text1.xml

 1 import xml.etree.ElementTree as ET
 2 
 3 tree=ET.parse('text1.xml')
 4 
 5 root=tree.getroot()
 6 
 7 print(root.tag)
 8 
 9 #遍历 xml 文档
10 for i in root:
11     print(i.tag,i.attrib)    # tag是指标签名，attrib 是指标签里的属性，text 是指标签内容
12     for j in i:
13         print(j.tag,j.attrib,j.text)
14         for k in j:
15             print(k.tag,k.attrib,k.text)
16 
17 #只遍历 year 标签
18 for w in root.iter('year'):  #只遍历指定标签
19     print(w.tag,w.text)

 1 import xml.etree.ElementTree as ET
 2 
 3 tree=ET.parse('text1.xml')
 4 
 5 root=tree.getroot()
 6 
 7 print(root.tag)
 8 
 9 #修改 xml
10 for node in root.iter('year'):  #要修改的标签
11     new_year=int(node.text)+1
12     node.text=str(new_year)
13     node.set('updsted_by','kong')  #给这个标签（year）添加新的属性 key：value
14 
15 tree.write('text1.xml')     #再吧数据写回去

import xml.etree.ElementTree as ET

tree=ET.parse('text1.xml')

root=tree.getroot()


for country in root.findall('country'):   #会取这个标签所有的数据
    rank=int(country.find('rank').text)
    if rank > 50:
        root.remove(country)    #删除数据


tree.write('output.xml')  #再把数据写回文件