有一个表，里面数据量比较大，每天一更新，其字段可以通过xml配置文件进行配置，即，可能每次建表的字段不一样。上游跑时会根据配置从源文件中提取，到入库这一步需要根据配置进行建表。
解决
写了一个简单的xml，配置需要字段及类型上游读取到对应的数据入库这一步，先把原表删除，根据配置建新表
xml文件
name="top_query" db_name="evaluting_sys"> id query varchar(200) false query pv integer false pv avg_money integer false
处理脚本
#!/usr/bin/python # -*- coding:utf-8 -*- #author: wklken #desc: use to read db xml config. #----------------------- #2012-02-18 created #---------------------- import sys,os from xml.dom import minidom, node def read_dbconfig_xml(xml_file_path): content = {} root = minidom.parse(xml_file_path) table = root.getelementsbytagname("table")[0] #read dbname and table name. table_name = table.getattribute("name") db_name = table.getattribute("db_name") if len(table_name) > 0 and len(db_name) > 0: db_sql = "create database if not exists `" + db_name +"`; use " + db_name + ";" table_drop_sql = "drop " + table_name + " if exists " + table_name + ";" content.update({"db_sql" : db_sql}) content.update({"table_sql" : table_drop_sql }) else: print "error:attribute is not define well! db_name=" + db_name + " ;table_name=" + table_name sys.exit(1) #print table_name, db_name table_create_sql = "create table " + table_name +"(" #read primary cell primary_key = table.getelementsbytagname("primary_key")[0] primary_key_name = primary_key.getelementsbytagname("name")[0].childnodes[0].nodevalue table_create_sql += primary_key_name + " integer not null auto_increment primary key," #print primary_key.toxml() #read ordernary field fields = table.getelementsbytagname("field") f_index = 0 for field in fields: f_index += 1 name = field.getelementsbytagname("name")[0].childnodes[0].nodevalue type = field.getelementsbytagname("type")[0].childnodes[0].nodevalue table_create_sql += name + " " + type if f_index != len(fields): table_create_sql += "," is_index = field.getelementsbytagname("is_index")[0].childnodes[0].nodevalue table_create_sql += ");" content.update({"table_create_sql" : table_create_sql}) #character set latin1 collate latin1_danish_ci; print content if __name__ == "__main__": read_dbconfig_xml(sys.argv[1])
涉及方法
root = minidom.parse(xml_file_path) 获取dom对象
root.getelementsbytagname(“table”) 根据tag获取节点列表
table.getattribute(“name”) 获取属性
primary_key.getelementsbytagname(“name”)[0].childnodes[0].nodevalue 获取子节点的值（id 得到id）
以上就是python 解析 xml[xml.dom] 的内容。