<?xml version="1.0"?>
<data><country name="Liechtenstein"><rank updated="yes">2</rank><year>2008</year><gdppc>141100</gdppc><neighbor name="Austria" direction="E"/><neighbor name="Switzerland" direction="W"/></country><country name="Singapore"><rank updated="yes">5</rank><year>2011</year><gdppc>59900</gdppc><neighbor name="Malaysia" direction="N"/></country><country name="Panama"><rank updated="yes">69</rank><year>2011</year><gdppc>13600</gdppc><neighbor name="Costa Rica" direction="W"/><neighbor name="Colombia" direction="E"/></country>
</data>　

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 ETtree = ET.parse("xmltest.xml")
root = tree.getroot()#修改
for node in root.iter('year'):new_year = int(node.text) + 1node.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')　

import xml.etree.ElementTree as ETnew_xml = ET.Element("namelist")
name = ET.SubElement(new_xml,"name",attrib={"enrolled":"yes"})
age = ET.SubElement(name,"age",attrib={"checked":"no"})
sex = ET.SubElement(name,"sex")
sex.text = '33'
name2 = ET.SubElement(new_xml,"name",attrib={"enrolled":"no"})
age = ET.SubElement(name2,"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　

minidom.parse(filename)
加载读取XML文件doc.documentElement
获取XML文档对象node.getAttribute(AttributeName)
获取XML节点属性值node.getElementsByTagName(TagName)
获取XML节点对象集合node.childNodes #返回子节点列表。

node.childNodes[index].nodeValue
获取XML节点值node.firstChild
#访问第一个节点。等价于pagexml.childNodes[0]

doc = minidom.parse(filename)
doc.toxml('UTF-8')
返回Node节点的xml表示的文本Node.attributes["id"]
a.name #就是上面的 "id"
a.value #属性的值
访问元素属性