python小例子之3 -- 解析xml文本

主题： 解析xml文本

环境： winxp pro + sp2 + python2.5

备注： 请注意，凡是在源代码文件中使用了中文字符，请最好保存为utf-8格式

测试用例sample.xml也请用utf-8格式保存

代码：

# parsexml.py
# 本例子参考自python联机文档，做了适当改动和添加

import xml.parsers.expat

# 控制打印缩进
level = 0

# 获取某节点名称及属性值集合
def start_element(name, attrs):
global level
print '  '*level, 'Start element:', name, attrs
level = level + 1

# 获取某节点结束名称
def end_element(name):
global level
level = level - 1
print '  '*level, 'End element:', name

# 获取某节点中间的值
def char_data(data):
if(data == '\n'):
return
if(data.isspace()):
return
global level
print '  '*level, 'Character data:', data

p = xml.parsers.expat.ParserCreate()

p.StartElementHandler = start_element
p.EndElementHandler = end_element
p.CharacterDataHandler = char_data
p.returns_unicode = False

f = file('sample.xml')
p.ParseFile(f)
f.close()

测试用例：测试用例：
xml 代码：sample.xml

<xml version="1.0"?>
<contacts id="bluecrystal">
<item name="keen" fff="ddd">
<telephone type="phone">222222222<!---->telephone>
<telephone type="mobile">134567890<!---->telephone>
<!---->item>
<item name="bcm">
<telephone type="phone">11111111<!---->telephone>
<telephone type="mobile">15909878909<!---->telephone>
<!---->item>
<!---->contacts>

测试结果：

Start element: contacts {'id': 'bluecrystal'}
Start element: item {'fff': 'ddd', 'name': 'keen'}
Start element: telephone {'type': 'phone'}
Character data: 222222222
End element: telephone
Start element: telephone {'type': 'mobile'}
Character data: 134567890
End element: telephone
End element: item
Start element: item {'name': 'bcm'}
Start element: telephone {'type': 'phone'}
Character data: 11111111
End element: telephone
Start element: telephone {'type': 'mobile'}
Character data: 15909878909
End element: telephone
End element: item
End element: contacts