处理XML文档

遍历xml文档

1 #遍历xml文档的子标签 2 for child in root: 3     print(child.tag,child.attrib) 4              #子标签名       属性 5     for i in child: 6         print(i.tag,i.text) 7              #子标签名   属性 8              #字节数标签不能遍历出属性，输出为空 9         #改进10         print(i.tag,i.text,i.attrib)11 12 #遍历自己需要的 例如只遍历'year'节点13 for node in root.iter('year'):14     print(node.tag,node.text)

修改

1 import xml.etree.ElementTree as ET 2  3 tree=ET.parse('xml_test.xml')   4 root=tree.getroot() 5  6 for node in root.iter('year'): 7     new_year=int(node.text)+1 8     node.text=str(new_year) 9         #赋值10     node.set('updated','yes')11           给year标签增加属性12 13 tree.write('xml_test.xml')

删除node

1 tree=ET.parse('xml_test.xml')  2 root=tree.getroot()3 4 for country in root.findall('country'):  #遍历country5     rank = int(country.find('rank').text)  #找出rank6     if rank > 50:7         root.remove(country)8 9 tree.write('output.xml') #写入文件为output.xml文件中

 

新建xml文件

1 import xml.etree.ElementTree as ET 2  3 new_xml = ET.Element("personinfolist")  #创建根节点 4 personinfo = ET.SubElement(new_xml, "personinfo", attrib={
   "enrolled": "yes"}) 5                           #是new_xml的子节点 6 name = ET.SubElement(personinfo, "name") 7 name.text='Jeck' 8 age = ET.SubElement(personinfo, "age", attrib={
   "checked": "no"}) 9                    #是personnifo的子节点10 sex = ET.SubElement(personinfo, "sex")11 sex.text='Men'12 age.text = '33' #给age节点赋值13 personinfo2 = ET.SubElement(new_xml, "personinfo", attrib={
   "enrolled": "no"})14 name = ET.SubElement(personinfo2, "name")15 name.text='Ailice'16 age = ET.SubElement(personinfo2, "age")17 age.text = '19'18 19 et = ET.ElementTree(new_xml)  # 生成文档对象20 et.write("test.xml", encoding="utf-8", xml_declaration=True)21         #写入到test.xml文件中              声明是xml格式的22 23 ET.dump(new_xml)  # 打印生成的格式