xml处理

xml的格式如下，就是通过<>节点来区别数据结构的:

22008141100520115990069201113600

　　xml协议在各个语言里的都 是支持的，在python中可以用以下模块操作xml

import xml.etree.ElementTree as ETtree = ET.parse("xmltest.xml")
root = tree.getroot()
print(root.tag)#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)

　　修改和删除xml文档内容

import xml.etree.ElementTree as ET
 
tree = ET.parse("xmltest.xml")
root = tree.getroot()
 
#修改
for node in root.iter('year'):
    new_year = int(node.text) + 1
    node.text = str(new_year)
    node.set("updated","yes")
 
tree.write("xmltest.xml")
 
 
#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')

自己创建xml文档

import xml.etree.ElementTree as ETnew_xml = ET.Element("namelist")
personinfo = ET.SubElement(new_xml,"personinfo",attrib={ "enrolled":"yes"})
name = ET.SubElement(personinfo,"name")
name.text = ''Mr Sun''
age = ET.SubElement(personinfo,"age",attrib={ "checked":"no"})
sex = ET.SubElement(personinfo,"sex")
age.text = '33'
personinfo2 = ET.SubElement(new_xml,"personinfo",attrib={ "enrolled":"no"})
name = ET.SubElement(personinfo2,"name")
name.text = ''Mis Chen''
age = ET.SubElement(personinfo2,"age")
age.text = '19'et = ET.ElementTree(new_xml) #生成文档对象
et.write("test.xml", encoding="utf-8",xml_declaration=True)ET.dump(new_xml) #打印生成的格式