深入了解python之XML操作

-*- coding:utf-8 -*-

# Author: Evan Mi

import xml.etree.ElementTree as ET

tree = ET.parse('test.xml')

root = tree.getroot()

print(root.tag)

# 一个节点有tag、attrib、text三个值

# tag是标签的名字

# text是标签的内容

# attrib是标签属性的字典，通过字典的get('key')来获取对应的属性的值

# 直接for chile in parent 来遍历节点下的子节点

for child in root:

    print(child.tag, child.attrib)

    for elem in child:

        print(elem.tag, elem.text, elem.attrib)

# 只遍历year节点

for node in root.iter('year'):

    print(node.tag, node.text)

# -*- coding:utf-8 -*-

# Author: Evan Mi

import xml.etree.ElementTree as ET

new_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('te.xml', encoding='utf-8', xml_declaration=True)

ET.dump(new_xml)  # 打印生成的格式

# -*- coding:utf-8 -*-

# Author: Evan Mi

import xml.etree.ElementTree as ET

tree = ET.parse('test.xml')

root = tree.getroot()

# 修改

for node in root.iter('year'):

    new_year = int(node.text) + 1

    node.text = str(new_year)   # 修改内容

    node.set("updated", "yes")  # 修改属性

tree.write('tt.xml')

# 删除

for country in root.findall('country'):

    rank = int(country.find('rank').text)

    if rank > 50:

        root.remove(country)

tree.write('tt1.xml')