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<network>
<device name="Server1">
    <description>
        <type>host</type>
        <vendor>generic</vendor>
        <OSType>FreeBSD</OSType>
        <OSVersion>7.2</OSVersion>
        <OSImage>ftp://frodo.avalon.ru/pub/ISO/FreeBSD</OSImage>
    </description>
    <interfaces>
        <port type="fast ethernet" id="eth0"/>
    </interfaces>
    <configuration>
        <url>nfs://frodo.avalon.ru/pub/FreeBSD-default.xml</url>
    </configuration>
</device>
<device name="Router1">
    <description>
        <type>router</type>
        <vendor>cisco</vendor>
        <model>2800</model>
        <OSType>IOS</OSType>
        <OSVersion>12.4</OSVersion>
        <OSImage>ftp://frodo.avalon.ru/pub/Cisco/c2800nm</OSImage>
    </description>
    <interfaces>
        <port type="fast ethernet" id="fa0/0"/>
    </interfaces>
    <configuration>
        <url>nfs://frodo.avalon.ru/pub/Cisco2800-default.xml</url>
    </configuration>
</device>
</network>

# -*- encoding: utf-8 -*-
"""
Имена элементов и атрибутов
"""
import xml.dom.minidom

fh = open("example.xml","r")
doc = xml.dom.minidom.parse(fh)
for node in dom.getElementsByTagName('device'):
    print node.getAttribute("name")
    for subnode in node.getElementsByTagName('port'):
         print subnode.getAttribute("id")

# -*- encoding: utf-8 -*-
"""
Добавление узла
"""
from xml.dom.minidom import parse
dom = parse("example.xml")

device = dom.createElement("device") 
description = dom.createElement("description")
type = dom.createElement("type")
txt = dom.createTextNode("server")
dom.childNodes[1].appendChild(device)
device.appendChild(description)
description.appendChild(type)
type.appendChild(txt)
print dom.toxml()

# -*- encoding: utf-8 -*-
"""
Добавление элемента
"""
from xml.dom.minidom import parse

dom = parse("example.xml")
x = dom.createElement("device")  # creates <foo />
dom.childNodes[0].appendChild(x)  # appends at end of 1st child's children
print dom.toxml()

# -*- encoding: utf-8 -*-
"""
Поиск элемента
"""
from xml.dom.minidom import parse

dom = parse("example.xml")
for node in dom.getElementsByTagName('configuration'):
    print node.toxml()

# -*- encoding: utf-8 -*-
"""
Разбор XML формата
"""
from xml.dom.minidom import parse, parseString

dom1 = parse( "example.xml" )   # parse an XML file
dom2 = parseString( "<myxml>Some data <empty/> some more data</myxml>" )
print dom1.toxml()
print dom2.toxml()