xmltest.xml内容如下：
<data>
<country name="Liechten">
<rank updated="yes">1</rank>
<year updated_by="Alex">2017</year>
<gdppc>140000</gdppc>
<neighbor direction="E" name="Austria" />
<neighbor direction="W" name="Switzerland" />
</country>
</data>
xml处理： import xml.tree.ElementTree as ET
tree=ET.parse("xmltest.xml") root=tree.getroot() #获取根节点 print(root) print(root.tag)
#遍历xml for child in root: ......print(child.tag,child.attrib) #打印孩子节点标签和属性 ......for i in child: ............print(i.tag,i.text.i.attrib)
#只遍历year节点 for node in root.iter('year') ......print(node.tag,node.text)
#xml修改
for node in root.iter('year'): ......new_year=int(node.text) ......node.text=str(new_year) ......node.set("updated_by","cai") tree.write("xmltest.xml")
#删除 for country in root.findall('country'): ......rank=int(country.find('rank').text) ......if rank>50: ..........root.remove(country) tree.write('output.xml')
#自己编写 import xml.etree.ElementTree as ET
new_xml=ET.Element("personinfolist") personinfo=ET.SubElement(new_xml,"personinfo",attrib={"enrolled":"yes"}) name=ET.SubElement(personinfo,"name") name.text="huaha" age=ET.SubElement(personinfo,"age",attrib={"checked":"no"}) age.text='12'
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
