Python xml

第一部分：读

########

##

# -*- coding:utf-8 -*-

"""

* User: not me

* Date: 11-11-9

* Time: 13：20

* Desc: not easy for newer like me

""" 

 

from  xml.dom import  minidom

 

 

def get_attrvalue(node, attrname):

     return node.getAttribute(attrname) if node else ''

 

def get_nodevalue(node, index = 0):

    return node.childNodes[index].nodeValue if node else ''

 

def get_xmlnode(node,name):

    return node.getElementsByTagName_r(name) if node else []

 

def xml_to_string(filename='example.xml'):

    doc = minidom.parse(filename)

    return doc.toxml('UTF-8')

 

def get_xml_data(filename='example.xml'):

    doc = minidom.parse(filename) 

    root = doc.documentElement

 

    user_nodes = get_xmlnode(root,'user')

    user_list=[]

    for node in user_nodes: 

        user_id = get_attrvalue(node,'id') 

        node_name = get_xmlnode(node,'username')

        node_email = get_xmlnode(node,'email')

        node_age = get_xmlnode(node,'age')

        node_sex = get_xmlnode(node,'sex')

 

        user_name =get_nodevalue(node_name[0]).encode('utf-8','ignore')

        user_email = get_nodevalue(node_email[0]).encode('utf-8','ignore') 

        user_age = int(get_nodevalue(node_age[0]))

        user_sex = get_nodevalue(node_sex[0]).encode('utf-8','ignore') 

        user = {}

        user['id'] , user['username'] , user['email'] , user['age'] , user['sex'] = (

            int(user_id), user_name , user_email , user_age , user_sex

        )

        user_list.append(user)

    return user_list

 

def test_xmltostring():

    print xml_to_string()

 

def test_laod_xml():

    user_list = get_xml_data()

    for user in user_list :

        #print user['sex']

        print '-----------------------------------------------------'

        if user:

            user_str='编   号：%d 用户名：%s 性   别：%s 年   龄：%s 邮   箱：%s ' % (int(user['id']) , user['username'], user['sex'] , user['age'] , user['email'])

            print user_str

            print '====================================================='

 

if __name__ == "__main__":

    test_xmltostring()

    test_laod_xml()

##code end

############

doc=minidom.parse('example.xml')

root=doc.documentElement

root.getElementsByTagName_r('user')[0].getAttribute('id')

obtain the id attribute

<user id="1000001">

root.getElementsByTagName_r('user')[0].getElementsByTagName_r('username')[0].chileNodes[0].nodeValue

get nodevalue not attribute

<username>Admin</username>

creatDocument()方法可以创建一个指定类型的XML文档对象

##note section

##############

<?xml version="1.0" encoding="UTF-8" ?>

<users>

    <user id="1000001">

        <username>Admin</username>

        <email>admin@live.cn</email>

        <age>23</age>

        <sex>男</sex>

    </user>

</users>

##exampl.xml

###############

第二部分：写

from xml.dom import minidom, Node 
doc = minidom.Document() 
doc.a(doc.createComment("Simple xml document__chapter 8")) 

#generate the book 

#<book> （root node）

book = doc.createElement_x_x('book') 
doc.a(book) 

#the title 

#<title> 
#      sample xml thing 
#</title> 
title = doc.createElement_x_x('title') 
title.a(doc.createTextNode("sample xml thing")) 
book.a(title) #在title在book下

任何级别的元素都有doc.creatElement('string')产生，但由自己的上级node执行

 

#the author section 

<book> 

    <title> 
        sample xml thing 
    </title> 
    <author> 
        <name> 
            <first> 
                ma 
            </first> 
            <last> 
                xiaoju 
            </last> 
        </name> 
author = doc.createElement_x("author") 
book.a(author) 
name = doc.createElement_x('name') 
author.a(name) 
firstname = doc.createElement_x('first') 
firstname.a(doc.createTextNode("ma")) 
name.a(firstname) 
lastname = doc.createElement_x('last') 
name.a(lastname) 
lastname.a(doc.createTextNode("xiaoju"))