参考文章:https://blog.csdn.net/weixin_42749767/article/details/82770563
先介绍xml.dom.minidom包,有一个读写的例子
read_write_xml.py

from xml.dom.minidom import parse
import xml.dom.minidom
import os
def is_xml_exist(xml_path):
xml_exist = os.path.exists(xml_path)
if not xml_exist:
return False
return True
"""
movie.xml
<collection shelf="New Arrivals">
<movie title="Enemy Behind">
<type>War, Thriller</type>
<format>DVD</format>
<year>2003</year>
<rating>PG</rating>
<stars>10</stars>
<description>Talk about a US-Japan war</description>
</movie>
<movie title="Transformers">
<type>Anime, Science Fiction</type>
<format>DVD</format>
<year>1989</year>
<rating>R</rating>
<stars>8</stars>
<description>A schientific fiction</description>
</movie>
<movie title="Trigun">
<type>Anime, Action</type>
<format>DVD</format>
<episodes>4</episodes>
<rating>PG</rating>
<stars>10</stars>
<description>Vash the Stampede!</description>
</movie>
<movie title="Ishtar">
<type>Comedy</type>
<format>VHS</format>
<rating>PG</rating>
<stars>2</stars>
<description>Viewable boredom</description>
</movie>
</collection>
"""
def read_movie_xml():
path = "movie.xml"
if not is_xml_exist(path):
print("%s is not exist" % path)
else:
# 使用minidom解析器打开XML文档
open_xml = parse(path)
root_node = open_xml.documentElement
shelf_attrib = "shelf"
if root_node.hasAttribute(shelf_attrib):
print("Lable: %s\tAttrib: %s\t\tValue: %s" % (
root_node.nodeName, shelf_attrib, root_node.getAttribute(shelf_attrib)))
print("")
# 在集合中获取所有电影
movie_node = "movie"
movies = root_node.getElementsByTagName(movie_node)
# 打印每部电影的详细信息
for movie in movies:
print("**** Movie ****")
if movie.hasAttribute("title"):
print("Title: %s" % movie.getAttribute("title"))
type_movie = movie.getElementsByTagName('type')[0]
print("Type: %s" % type_movie.childNodes[0].data)
format_movie = movie.getElementsByTagName('format')[0]
print("Format: %s" % format_movie.childNodes[0].data)
rating_movie = movie.getElementsByTagName('rating')[0]
print("Rating: %s" % rating_movie.childNodes[0].data)
descrip_movie = movie.getElementsByTagName('description')[0]
print("Rating: %s" % descrip_movie.childNodes[0].data)
print("")
if __name__ == "__main__":
read_movie_xml()
运行结果:

用到的知识点:
1. 导入xml包:
from xml.dom.minidom import parse
2. 打开xml文件:
open_xml = parse(path)root_node = open_xml.documentElement
3. 获取节点名称:
root_node.nodeName
4. 判断节点属性是否存在:
root_node.hasAttribute(shelf_attrib)
5. 获取节点属性:
root_node.getAttribute(shelf_attrib)
6. 获取子节点对象:
root_node.getElementsByTagName(movie_node)
7. 获取文本节点的文本信息:
type_movie.childNodes[0].data
以上语句务必正确使用,运行第二步,xml必须已经存在,运行第六步,子节点的标签必须存在,运行第七步,此节点必须是文本节点,否则都会出现异常。
来源:https://www.cnblogs.com/smart-zihan/p/12015192.html
