Question

我陷入了一个小困境。我使用Python的2.7版模块MySQLdb从表中获取列表。到目前为止，代码非常简单：

#!/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(MySQLdb.cursors.DictCursor)
        cursor.execute("""SELECT serial, registered_id FROM devices WHERE registered_id IS NOT NULL AND registered_id <>''""")
        devices = cursor.fetchall()
        print devices
except:
        print "Something went wrong with the MySQL"

打印出来的时间如下：

（（＆＃39; 00000000762c1d3c＆＃39;，＆＃39; 019＆＃39;），（＆＃39; 000000003ad192f2＆＃39;，＆＃39; 045＆＃39;），（＆＃39; 000000004c9898aa＆＃39;，＆＃39; 027＆＃39;））

（我把它缩短了，因为它很长。）

如何将此列表正确解析为JSON，使其如下所示：

{
            "device":
                [
                    { "serial": "00000000762c1d3c", "registered_id": "019" },
                    { "serial": "000000003ad192f2", "registered_id": "045" },
                    { "serial": "000000004c9898aa", "registered_id": "027" },
                ]
        }

我已经想通过将此与DictCursors相对应来添加：

for row in devices:
        print "%s, %s" % (row["serial"], row["registered_id"])

我能够分别打印它们。但我仍然无法弄清楚如何正确构建JSON。

感谢您的建议！

Answer 1

DictCursor可能会使事情变得更简单：

import json

db = MySQLdb.connect(host=db_host, 
                     user=db_user, 
                     passwd=db_passwd, 
                     db=db_table, 
                     cursorclass=MySQLdb.cursors.DictCursor)
cursor = db.cursor()
cursor.execute("""SELECT serial, registered_id FROM devices WHERE registered_id IS NOT NULL AND registered_id <>''""")
devices = cursor.fetchall()

data = {"device": list(devices)}

# dump to a json file
with open("output.json", "w") as f:
    json.dump(data, f)

格式化从MySQL中的MySQLdb到JSON的选择列表

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