xml处理模块

Posted 2020-06-17

xml处理模块

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。

import xml.etree.ElementTree as ET

tree = ET.parse("country.xml")
root = tree.getroot() # 获得根节点

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)

 

import xml.etree.ElementTree as ET

tree = ET.parse("country.xml")
root = tree.getroot() # get the root node

#只获得year节点
for node in root.iter(‘year‘):
    print(node.tag,node.text)

　　

#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("xml_test2.xml")

　　

#删除


for country in root.findall("country"):
    rank = int(country.find(‘rank‘).text)
    if rank > 50:
        root.remove(country)
tree.write("xml_test2.xml")

　　

#create
new_xml = ET.Element("namelist")#root
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("new_test.xml", encoding="utf-8",xml_declaration=True)

ET.dump(new_xml) #打印生成的格式