xml實例版本：

　　<a>
　　　　<city:table xmlns:city="city">
        <heilongjiang name="citys"><city:haerbin/><city:daqing/></heilongjiang>
        <guangdong name="citys"><city:guangzhou/><city:shenzhen/><city:zhuhai/></guangdong>
        <taiwan name="
 
citys"><city:taibei/><city:gaoxiong/></taiwan>
        <xinjiang name="citys"><city:wulumuqi> 晴</city:wulumuqi></xinjiang>
        </city:table>
　　</a>    

<city:table xmlns:city="city"></city:table>
聲明命名空間，city為變量，xmlns定義city變量的值。
python 讀取輸出實例：
 

        xp=xpxlm.xpath(‘//node()‘)
        print xp,           #.items()#.tag
        for i in xp:
            if ‘‘ in i or ‘\n‘ in i:
                continue
            else: 
                print i.tag

輸出結果：

{city}table
heilongjiang
{city}haerbin
{city}daqing
guangdong
{city}guangzhou
{city}shenzhen
{city}zhuhai
........
 

改變<city:table xmlns:city="city">為

<city:table xmlns:city="a">
輸出結果為：

{a}table
heilongjiang
{a}haerbin
{a}daqing
guangdong
{a}guangzhou
{a}shenzhen
{a}zhuhai
taiwan
{a}taibei
{a}gaoxiong
xinjiang
{a}wulumuqi

python通過LXML庫讀取xml命名空間