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