xml模块

# import xml.etree.cElementTree as ET #用ET 代指xml.etree.cElementTree模块，方便后面模块的取用
#
# tree = ET.parse('country')
# root = tree.getroot() #得到根节点
# print(root.tag)  #得到标签名，，，root.tag意思是得到根的标签名

# for i in root:
    # print(i.tag)
    # for x in i:
    #     print(x.tag)
    # print(i.attrib)  #获取标签的属性值
    #     print(x.attrib)
    #     print(x.text) #获取标签的值
#xml文件的遍历
# for i in root:
#     print(i.tag,i.attrib)
#     for x in i:
#         print(x.tag,x.text)

#只遍历year的值
# for i in root.iter('year'):
#     print(i.tag,i.text)

#-----------------以上是查看-----------------
#---------------下面是修改xml文件-----------------------
import xml.etree.cElementTree as ET

tree = ET.parse('country')
root = tree.getroot()

#修改文件
# for node in root.iter('year'):
#     new_node = int(node.text)+1
#     node.text = str(new_node)
#     node.set("updated","yes") #更新到xml文件中
# tree.write('abc.xml')  #将内存中产生的数据写到一个新的文件里面，也可以直接覆盖原文件
# tree.write('conutry.xml')

#删除
#删除rank值大于50的国家
for i in root.findall('country'):
    a = int(i.find('rank').text)
    if a > 50:
        root.remove(i)
tree.write('abc')


# ---------------
#自己创建一个xml文件

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