原文链接：http://wyb0.com/posts/python-read-and-write-xml/
0x00 解析XML的方法
SAX (simple API for XML)
python 标准库包含SAX解析器，SAX用事件驱动模型，通过在解析XML的过程中触发一个个的事件并调用用户定义的回调函数来处理XML文件。DOM(Document Object Model)
将XML数据在内存中解析成一个树，通过对树的操作来操作XML。ElementTree(元素树)
ElementTree就像一个轻量级的DOM，具有方便友好的API。代码可用性好，速度快，消耗内存少。
- 我在这里使用ElementTree
0x01 Element对象的属性
每个Element对象都具有以下属性：
- tag：string对象，表示数据代表的种类
- attrib：dictionary对象，表示附有的属性
- text：string对象，表示element的内容
- tail：string对象，表示element闭合之后的尾迹
- 若干子元素（child elements）
>>> from xml.etree import ElementTree as ET
>>> xml = """<books>
... <book id='37476'>aaaa</book>
... <book id='83727'>bbbb</book>
... </books>"""
>>> root = ET.fromstring(xml)
>>> root.tag
'books'
>>> child = root.getchildren()
>>> child
[<Element 'book' at 0x106f59410>, <Element 'book' at 0x106f59450>]
>>> child[0].tag
'book'
>>> child[0].attrib
{'id': '37476'}
>>> child[0].text
'aaaa'
0x02 文件内容
<?xml version='1.0' encoding='UTF-8'?>
<books>
<book>
<name>Python黑帽子</name>
<date>2015</date>
<price>37￥</price>
<description>用python写一些程序</description>
</book>
<book>
<name>Web安全深度剖析</name>
<date>2014</date>
<price>39￥</price>
<description>讲述web渗透的基础知识</description>
</book>
<book>
<name>白帽子讲web安全</name>
<date>2013</date>
<price>44￥</price>
<description>道哥力作</description>
</book>
</books>
0x03 读取xml节点
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from xml.etree import ElementTree as ET
tree = ET.parse('test.xml')
root = tree.getroot()
# root = ET.fromstring(country_data_as_string) #通过字符串导入,直接获取根
childs = root.getchildren()
books = []
for child0 in childs:
book = {}
for child00 in child0.getchildren():
# print child00.tag #标签名，即name、date、price、description
# print child00.text
book[child00.tag] = child00.text
books.append(book)
print books
"""
books = [
{'name': 'Python黑帽子','date': '2015','price': '37￥','description': '用python写一些程序'},
{'name': 'Web安全深度剖析','date': '2014','price': '39￥','description': '讲述web渗透的基础知识'},
{'name': '白帽子讲web安全','date': '2013','price': '44￥','description': '道哥力作'}
]
"""
0x04 写入xml文件
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from xml.etree.ElementTree import Element,ElementTree
books = [
{
'name': u'Python黑帽子',
'date': '2015',
'price': u'37￥',
'description': u'用python写一些程序'
},
{
'name': u'Web安全深度剖析',
'date': '2014',
'price': u'39￥',
'description': u'讲述web渗透的基础知识'
},
{
'name': u'白帽子讲web安全',
'date': '2013',
'price': u'44￥',
'description': u'道哥力作'
}
]
def indent(elem, level=0):
"""美化写入文件的内容"""
i = "\n" + level*" "
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + " "
if not elem.tail or not elem.tail.strip():
elem.tail = i
for elem in elem:
indent(elem, level+1)
if not elem.tail or not elem.tail.strip():
elem.tail = i
else:
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
root = Element('books')
tree = ElementTree(root)
for book in books:
child0 = Element('book')
root.append(child0)
for k,v in book.items():
child00 = Element(k)
child00.text = v
child0.append(child00)
indent(root,0)
tree.write('aa.xml', 'UTF-8')
