xml模块

#Time : 2020/7/29 19:59
#FileName: xml_test.py
#Email : 945784220@qq.com
#Software: PyCharm
#Blog:https://www.cnblogs.com/BBS2013/

# import xml.etree.ElementTree as ET
#
# tree = ET.parse("xml_test")  #解析
# root = tree.getroot()
# print(root.tag)
#
# # 遍历xml文档
# for child in root:
#     print(child.tag, child.attrib)        # country {'name': 'Liechtenstein'}
#     for i in child:
#         print(i.tag, i.text)
#         #rank 2
#         #year 2009
#         #gdppc 141100
#         #neighbor None    自闭合标签不返回
#         #neighbor None  自闭合标签不返回

# # 只遍历year 节点
# for node in root.iter('year'):
#     print(node.tag, node.text)
# ---------------------------------------
#
import xml.etree.ElementTree as ET

tree = ET.parse("xml_test")
root = tree.getroot()

# # 修改
# for node in root.iter('year'):
#     new_year = int(node.text) + 1
#     node.text = str(new_year)
#     node.set("updated", "yes")  #如何修改树的节点属性，通过node.set('属性','属性参数')
# tree.write("xml_test")
#

# 删除node
for country in root.findall('country'):
    rank = int(country.find('rank').text)
    if rank > 50:
        root.remove(country)

tree.write('output.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 = '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("test.xml", encoding="utf-8",xml_declaration=True)
 
ET.dump(new_xml) #打印生成的格式

创建xml文档