使用Python从MySQL获取JSON格式的列表

我有点进退两难。我正在使用Python的2.7版模块MySQLdb从表中获取列表。代码很简单：

#!/usr/bin/python
import json
import MySQLdb

db_host = "localhost"
db_user = "xxx"
db_passwd = "yyy"
db_table = "table"

try:
        db = MySQLdb.connect(host=db_host, user=db_user, passwd=db_passwd, db=db_table)
        cursor = db.cursor()
        cursor.execute("""SELECT serial FROM devices WHERE registered_id IS NOT NULL AND registered_id <>''""")
        devices = cursor.fetchall()
        print devices
except:
        print "Something went wrong with the MySQL"

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谢谢你的建议

注意：只有多行字符串才需要三重引号字符串

“…”

，否则只需添加不必要的杂波即可。

data = {"devices": [item[0] for item in devices]}
json_data = json.dumps(data)

data = {"devices": [item[0] for item in devices]}
json_data = json.dumps(data)