xml模块

xml模块是一种文件数据处理格式的方法，常用与生成、解析或修改.xml配置文件

　　1.常见的.xml配置文件格式如下

<admin>
    <country name="Liechtenstein">
        <rank updated="yes">2</rank>
        <year>2008</year>
        <gdppc>141100</gdppc>
        <neighbor direction="E" name="Austria" />
        <neighbor direction="W" name="Switzerland" />
    </country>
    <country name="Singapore">
        <rank updated="yes">5</rank>
        <year>2011</year>
        <gdppc>59900</gdppc>
        <neighbor direction="N" name="Malaysia" />
    </country>
    <country name="Panama">
        <rank updated="yes">69</rank>
        <year>2011</year>
        <gdppc>13600</gdppc>
        <neighbor direction="W" name="Costa Rica" />
        <neighbor direction="E" name="Colombia" />
    </country>
</admin>

　　2.xml模块的简单使用

# -*- coding:utf-8 -*-
# Author:Wong Du


import xml.etree.ElementTree as xet

tree = xet.parse('test.xml')        # 解析xml对象
root = tree.getroot()           # 读取xml文件内容
# print(root.tag)        #只显示第一层tag

for i in root:
    print(i.tag, i.attrib)
    for i1 in i:
        print(i1.tag,i1.attrib,i1.text)

for i in root.iter():       #获取所有层的tag
    print(i.tag)


# 修改
root.tag = 'admin'
tree.write('test.xml')

# 删除
for i in root.iter():
    if 'direction' in i.attrib:
        i.attrib.pop('direction')
tree.write('test1.xml')

　　3. 用Python创建.xml文件小实例

# -*- coding:utf-8 -*-
# Author:Wong Du

import xml.etree.ElementTree as xet

new_xml = xet.Element('Earth')

Country = xet.SubElement(new_xml,'Country',attrib={'Cname':'China'})
Province = xet.SubElement(Country,'Province',attrib={'Pname':'Guangdong'})
Province2 = xet.SubElement(Country,'Province',attrib={'Pname':'Shanghai'})
Province3 = xet.SubElement(Country,'Province',attrib={'Pname':'Beijing'})
Province4 = xet.SubElement(Country,'Province',attrib={'Pname':'Guangxi'})
City = xet.SubElement(Province4,'City',attrib={'特色':'旅游'})
City.text = '桂林'



xet_tree = xet.ElementTree(new_xml)
xet_tree.write('create.xml',encoding='utf-8',xml_declaration=True)

xet.dump(new_xml)

<?xml version='1.0' encoding='utf-8'?>
<Earth>
    <Country Cname="China">
        <Province Pname="Guangdong" />
        <Province Pname="Shanghai" />
        <Province Pname="Beijing" />
        <Province Pname="Guangxi">
            <City 特色="旅游">桂林</City>
        </Province>
    </Country>
</Earth>