xml是实现不同语言或程序之间进行数据交换的协议，跟json差不多，但json使用起来更简单，不过，古时候，在json还没诞生的黑暗年代，大家只能选择用xml呀，至今很多传统公司如金融行业的很多系统的接口还主要是xml。
xml的格式如下，就是通过<>节点来区别数据结构的:
xml处理方式
# Author:Sooele import xml.etree.ElementTree as ET tree = 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)
xml修改、删除
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) + 1 node.text = str(new_year) node.set("updated","yes")tree.write("xmltest.xml")#删除nodefor country in root.findall('country'): rank = int(country.find('rank').text) if rank > 50: root.remove(country)tree.write('output.xml')xml样板
<?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>
