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

数据准备

1 
       2  3     
       
         4         
        
         2
         5         
        
         2008
         6         
        
         141100
         7         
         8         
         9     
       10     
       
        11         
        
         5
        12         
        
         2011
        13         
        
         59900
        14         
        15     
       16     
       
        17         
        
         69
        18         
        
         2011
        19         
        
         13600
        20         
        21         
        22     
       23 

读取xml

import xml.etree.ElementTree as ETtree = ET.parse("hhh.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xml

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')

 

创建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