python操作xml文件示例

代码如下:
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