<data>

    <country name="china">

        <rank updated="yes">1</rank>

        <year>2019</year>

        <neighbor name="American"/>

    </country>

    <country name="Canada">

        <rank updated="yes">2</rank>

        <year>2019</year>

        <neighbor name="American"/>

    </country>

</data>

import xml.etree.ElementTree as ET

tree = ET.parse("xml")

root = tree.getroot()

print(root.tag)

print('__________________')

# 查

for a in root:                # 遍历根

    print(a.tag)

    print(a.attrib)

    for b in a :            # 遍历根的下一级

        print(b.text)

for node in root.iter('year'):     #遍历节点,取year的内容

    print(node.tag,node.text)

data

__________________

country

{'name': 'china'}

2

2019

None

country

{'name': 'Canada'}

2

2019

None

year 2019

year 2019

Process finished with exit code 0

import xml.etree.ElementTree as ET

tree = ET.parse("xml")

root = tree.getroot()

# 修改

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

    new_year = int(node.text) + 1       #  年份加1

    node.text = str(new_year)

    node.set("updated","yes")         # 多加一个属性

tree.write("xml_text.xml")           # 放到一个新的文件里

# 删除

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

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

    if rank >1:                     # 删除排名大于1的国家的信息

        root.remove(country)

tree.write("xml_test2.xml")

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 = ""

et = ET.ElementTree(new_xml)

et.write("xml2_test.xml",encoding="utf-8",xml_declaration=True)