python查询mysql以字典返回

# *_*coding:utf-8 *_*
import pymysql

conn = pymysql.connect(host='192.168.33.10', user='root', passwd='root', db='spider', charset='utf8')
cur = conn.cursor(cursor=pymysql.cursors.DictCursor)

sql = "select * from topic order by id asc "
cur.execute(sql)  # 返回受影响的行数
res = cur.fetchall()  # 返回数据,返回的是tuple类型

for item in res:
    print(item['id'])
cur.close()
conn.close()