以前用Python中的minidom写过生成XML文件的程序,现在需要读取XML文件中的内容了，首先想到的还是minidom模块.一番编写测试后,如愿掌握了其函数的使用方式,和AJAX中的DOM操作没什么区别.
以前就知道elementtree在处理XML文件时广受Python程序员的欢迎,也安装过elementtree的安装包,现在使用的Python2.5中已将其收录了.既然我要处理XML文件，当然也要学着使用更高效和易用的模块了.自己摸索了半天,除了有关名字空间的函数没有试用外,其它函数都试用过了.以后处理XML文件可以得心应手了。
下面是一个简单的例子,通过它可以知道各个函数的使用方法：
- from xml.etree.ElementTree import ElementTree
from xml.etree.ElementTree import Element
from xml.etree.ElementTree import SubElement
from xml.etree.ElementTree import dump
from xml.etree.ElementTree import Comment
from xml.etree.ElementTree import tostring
‘’’
<?xml version=”1.0”?>
<PurchaseOrder>
<account refnum=”2390094”/>
<item sku=”33-993933” qty=”4”>
<name>Potato Smasher</name>
<description>Smash Potatoes like never before.</description>
</item>
</PurchaseOrder>
‘’’
## Writing the content to xml document
book = ElementTree()
purchaseorder = Element(‘PurchaseOrder‘)
book.setroot(purchaseorder)
SubElement(purchaseorder, ‘account‘, {‘refnum‘ : “2390094“})
item = Element(“item“, {‘sku‘ : ‘33-993933‘, ‘qty‘ : ‘4‘})
purchaseorder.append(item)
print item.items() # [(‘sku’, ‘33-993933’), (‘qty’, ‘4’)]
print item.attrib # {‘sku’: ‘33-993933’, ‘qty’: ‘4’}
print item.get(‘sku‘) # 33-993933
SubElement(item, ‘name‘).text = “Potato Smasher“
SubElement(item, ‘description‘).text = “Smash Potatoes like never before.“
#book.write(‘book.xml’,”utf-8”)
#print tostring(purchaseorder)
#import sys
#book.write(sys.stdout)
#dump(book)
## Displaying the content of the xml document
print purchaseorder.find(‘account‘)
print purchaseorder.find(‘account‘).get(‘refnum‘)
print purchaseorder.findall(‘account‘)[0].get(‘refnum‘)
print purchaseorder.find(‘item/name‘)
print purchaseorder.find(‘item/name‘).text
## How to use ElementTree([element,] [file])
## 1. From standard XML element, it becomes root element
print ElementTree(item).getroot().find(‘name‘).text
## 2. From XML file
print ElementTree(file=’book.xml‘).getroot().find(‘item/description‘).text
## Create an iterator
for element in purchaseorder.getiterator():
print element.tag
## Get pretty look
def indent(elem, level=0):
i = “\n“ + level*” “
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + “ “
for e in elem:
indent(e, level+1)
if not e.tail or not e.tail.strip():
e.tail = i
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
return elem
if name==”_main“:
dump(indent(purchaseorder))
book.write(‘book.xml‘,”utf-8“)
绝地灬酷狼
àì夳堔傛蜴生んèń
爱被打了一巴掌
分手后的思念是犯贱
灰太狼
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