python基础学习日志day5---xml和configparse模块

Posted 2020-09-18

1）XML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。

下面是xml的遍历查询删除修改和生成

# -*- coding:utf-8 -*-
__author__ = ‘shisanjun‘

import xml.etree.ElementTree as ET

etree=ET.parse("xml.xml")
root=etree.getroot()

#遍历XML
for child in root:
    print(child.tag,child.attrib,child.text)
    for i in child:
        print("\t",i.tag,i.attrib,i.text)

#查询
for child in root.iter("year"):
    print(child.tag,child.text)

#修改和删除xml文档内容
for country in root.findall("country"):
    rank=country.find("rank").text
    if int(rank)>50:
        root.remove(country)

etree.write("xml1.xml")

for year in root.iter("year"):
    year_tmp=int(year.text)+1
    year.text=str(year_tmp)
    year.set("update","yes")
etree.write("xml2.xml")

#创建XML文件

new_xml=ET.Element("root") #生成根
name=ET.SubElement(new_xml,"name",attrib={"errol":"2013"})
age=ET.SubElement(name,"age")
age.text=str(23)

sex=ET.SubElement(name,"sex")
sex.text="boy"

et=ET.ElementTree(new_xml)
et.write("xml3.xml",encoding="utf-8",xml_declaration=True)#写入文件

ET.dump(new_xml) #打印到终端