python mysql插入语句使用dict快速

conn = MySQLdb.connect(host='localhost',user='', passwd='', db='cai_test')
cursor = conn.cursor()
for line in data:
sentence = line.replace('\n','').split('\t')
provin = sentence[2].split(';')
my_dict = {}
my_dict['ip'] = sentence[0]
my_dict['province_num'] = sentence[1]
p_string= ""
for i in range(1,len(provin)):
item = provin[i].split(':')
my_dict[item[0]] = item[1]
print my_dict
qmarks = ', '.join(['%s'] * len(my_dict))  #核心代码
cols = ', '.join(my_dict.keys())#核心代码
sql_str = "insert into ip_data (%s) values (%s)" % (cols,qmarks)
cursor.execute(sql_str,my_dict.values())
conn.commit()