python操作xml文件示例

def get_seed_data(filename):
dom = minidom.parse(filename)
root = dom.documentElement
system_nodes = root.getElementsByTagName("system")
k = 0
seed_list = []
for system_node in system_nodes:
 #print system_node.nodeName+' id='+system_node.getAttribute('id')
 system_id = system_node.getAttribute("id")
 system_name = system_node.getAttribute("name")
 #print 'system_name:%s'%system_name
 section_nodes = system_node.getElementsByTagName("section")
 for section_node in section_nodes:
 section_id = section_node.getAttribute('id')
 section_name = section_node.getAttribute('name')
 #print ' '+section_node.nodeName+' id='+section_id+' name='+section_name
 crawl_cycle_node = section_node.getElementsByTagName("crawl_cycle")
 crawl_cycle = crawl_cycle_node[0].childNodes[0].nodeValue
 #print ' '+crawl_cycle_node[0].nodeName+'='+crawl_cycle
 seed_nodes = section_node.getElementsByTagName('seed')
 for seed_node in seed_nodes:
 seed = {}
 seed['crawl_cycle'] = crawl_cycle
 seed['system_id'] = int(system_id)
 seed['system_name'] = system_name
 seed['section_id'] = int(section_id)
 seed['section_name'] = section_name
 seed_id = seed_node.getAttribute('id')
 seed['seed_id'] = int(seed_id)
 #print ' '+seed_node.nodeName+' '+'id='+seed_id
 userblog_url_node = seed_node.getElementsByTagName('userblog_url')
 userblog_url = userblog_url_node[0].childNodes[0].nodeValue
 seed['userblog_url'] = userblog_url
 #print ' '+'userblog_url'+' '+userblog_url
 print '-------------------------------------------'
 print 'system_id:%d' % seed['system_id']
 print 'system_name:%s'%seed['system_name']
 print ' section_id:%d' % seed['section_id']
 print ' section_name:%s' % seed['section_name']
 print ' seed_id:%d' %seed['seed_id']
 print ' userblog_url:%s' %seed['userblog_url']
 print '========================='
 seed_list.append(seed)
 print seed_list[k]
 k += 1
 os.system('pause')
return seed_list

<?xml version="1.0" encoding="utf-8" ?>
<seeds>
<system id="1" name="新浪">
<section id="1" name="娱乐">
<crawl_cycle> </crawl_cycle>
<seed id="1">
<userblog_url>http://aaa.com.cn/loveissuuny</userblog_url>
</seed>
<seed id="2">
<userblog_url>http://aaa.com.cn/loveissuuny</userblog_url>
</seed>
<seed id="3">
<userblog_url>http://aaa.com.cn/sanxiazaixian</userblog_url>
</seed>
</section>
<section id="2" name="读书">
<crawl_cycle> </crawl_cycle>
<seed id="11">
<userblog_url>http://aaa.com.cn/twocold</userblog_url>
</seed>
<seed id="12">
<userblog_url>http://aaa.com.cn/u/1233526741</userblog_url>
</seed>
</section>
</system>
</seeds>

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