python从XML里取数，遍历等

#coding=utf-8

#通过minidom解析xml文件

import xml.dom.minidom as xmldom

import os

'''

XML文件读取

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

<catalog>

    <maxid>4</maxid>

    <login username="pytest" passwd='123456'>dasdas

        <caption>Python</caption>

        <item id="4">

            <caption>测试</caption>

        </item>

    </login>

    <item id="2">

        <caption>Zope</caption>

    </item>

</catalog>

'''

'''

x_path="E:\\doc\\项目文档\\广东\\拓扑图\\test.xml"

xmlfilepath = os.path.abspath(x_path)

print ("xml文件路径：", xmlfilepath)

# 得到文档对象

domobj = xmldom.parse(xmlfilepath)

print("xmldom.parse:", type(domobj))

# 得到元素对象

elementobj = domobj.documentElement

print ("domobj.documentElement:", type(elementobj))

#获得子标签

subElementObj = elementobj.getElementsByTagName("login")

print ("getElementsByTagName:", type(subElementObj))

print (len(subElementObj))

# 获得标签属性值

print (subElementObj[0].getAttribute("username"))

print (subElementObj[0].getAttribute("passwd"))

#区分相同标签名的标签

subElementObj1 = elementobj.getElementsByTagName("caption")

for i in range(len(subElementObj1)):

    print ("subElementObj1[i]:", type(subElementObj1[i]))

    print (subElementObj1[i].firstChild.data)  #显示标签对之间的数据

'''

x_path="E:\\doc\\项目文档\\广东\\拓扑图\\index.do.xml"

nodes=list()

xmlfilepath = os.path.abspath(x_path)

def findNodeIndex(node):

    for i in range(len(nodes)):

        if(nodes[i]==node):

            return str(i) # +":"+nodes[i]

print ("xml文件路径：", xmlfilepath)

# 得到文档对象

domobj = xmldom.parse(xmlfilepath)

print("xmldom.parse:", type(domobj))

# 得到元素对象

elementobj = domobj.documentElement

#print ("domobj.documentElement:", type(elementobj))

subElementObj = elementobj.getElementsByTagName("data")

print(len(subElementObj))

for i in range(len(subElementObj)):

    if(subElementObj[i].getAttribute("type")=='twaver.Node'):

        sub2=subElementObj[i].getElementsByTagName("p")

        for j in range(len(sub2)):

            if(sub2[j].getAttribute("n")=='name'):

                node=sub2[j].firstChild.data.replace('...','')

                print("{name:'",node,"',draggable: true,},")

                nodes.append(node)

print("nodes len:",len(nodes))

for i in range(len(subElementObj)):

    if(subElementObj[i].getAttribute("type")=='twaver.Link'):

        sub3=subElementObj[i].getElementsByTagName("c")

        for j in range(len(sub3)):

            node=sub3[j].firstChild.data.replace('...','')

            iNode=findNodeIndex(node)

            if(sub3[j].getAttribute("n")=='aNode'):

                #print(sub3[j].firstChild.data ,' ',iNode, end='')

                print('{source:',iNode, end='')

            elif(sub3[j].getAttribute("n")=='zNode'):

                #print(sub3[j].firstChild.data,' ',iNode)

                print(",target:",iNode,"},")