使用 pymysql 将 Json 文件连接到 MySQL 数据库时出错

Posted 2023-03-23

【中文标题】使用 pymysql 将 Json 文件连接到 MySQL 数据库时出错

【英文标题】：Error connecting Json file to MySQL database using pymysql

【发布时间】：2021-10-11 12:16:18

【问题描述】：

import pymysql
import json

json_data = open("data_chart.json").read()
json_obj = json.loads(json_data)

connection = pymysql.connect(host='', user='=',
                             password='=', database='=')

cursor = connection.cursor()

for item in json_obj:

    Current_Fridge_Temp = item.get("Current Fridge Temperature")
    Target_Fridge_Temp = item.get("Target Fridge Temperature")
    Current_Freezer_Temp = item.get("Current Freezer Temperature")
    Target_Freezer_Temp = item.get("Target Freezer Temperature")
    E_Use = item.get("Energy Use")
    Fridge_Last_On = item.get("Fridge Last On Time")
    Fridge_Last_Off = item.get("Fridge Last Off Time")
    Freezer_Last_On = item.get("Freezer Last On Time")
    Freezer_Last_Off = item.get("Freezer Last Off Time")

    cursor.execute("insert into refrigerator_id(Current Fridge Temperature, Target Fridge Temperature, "
                   "Current Freezer Temperature, Target Freezer Temperature, Energy Use, Fridge Last On Time, "
                   "Fridge Last Off Time, Freezer Last On Time, Freezer Last Off Time) "
                   "VALUES(%d,%d,%d,%d,%d,%d,%d,%d,%d)", (Current_Fridge_Temp, Target_Fridge_Temp, Current_Freezer_Temp,
                                                         Target_Freezer_Temp, E_Use, Fridge_Last_On, Fridge_Last_Off,
                                                         Freezer_Last_On, Freezer_Last_Off))
 
connection.commit()
connection.close()

获取这些回溯错误：

Traceback (most recent call last):
  File "/Users/ConnectionTest.py", line 24, in <module>
    cursor.execute("insert into refrigerator_id(Current Fridge Temperature, Target Fridge Temperature, "
  File "/Users/venv/lib/python3.8/site-packages/pymysql/cursors.py", line 146, in execute
    query = self.mogrify(query, args)
  File "/Users/venv/lib/python3.8/site-packages/pymysql/cursors.py", line 125, in mogrify
    query = query % self._escape_args(args, conn)
TypeError: %d format: a number is required, not str

我尝试将 VALUES 更改为 %s，但没有成功。

【问题讨论】：

“没有”将其更改为%s 究竟是如何工作的？

这没有帮助，给我们完整的错误信息。 SQL 语句的正确占位符是 %s.

@sam：这不是完整的错误消息，缺少信息部分。请将程序的完整输出（包括完整的错误消息，格式正确）复制粘贴到问题中。

@sam：请将整个错误消息复制粘贴到问题中。不要截断它！

将所有项目从 json 转换为 int，因为 json 只返回字符串

【参考方案1】：

Jsons 元素都是字符串，所以你需要在运行查询之前将它们转换成整数

Current_Fridge_Temp = int(item.get("Current Fridge Temperature")))
Target_Fridge_Temp = int(item.get("Target Fridge Temperature"))
Current_Freezer_Temp = int(item.get("Current Freezer Temperature"))
Target_Freezer_Temp = int(item.get("Target Freezer Temperature"))
E_Use = int(item.get("Energy Use"))
Fridge_Last_On = item.get("Fridge Last On Time")
Fridge_Last_Off = item.get("Fridge Last Off Time")
Freezer_Last_On = item.get("Freezer Last On Time")
Freezer_Last_Off = item.get("Freezer Last Off Time")

【讨论】：

谢谢，这可以工作，但在第 19 行 Traceback 上出现错误（最近一次调用最后一次）：文件“/Users/PycharmProjects/cConnectionTest.py”，第 19 行，在 Fridge_Last_On = int(item.get("Fridge Last On Time")) ValueError: int() 以 10 为底的无效文字：'10:59:5'

“当前冰箱温度”：30，“目标冰箱温度”：38，“当前冷冻室温度”：9，“目标冷冻室温度”：2，“能源使用”：265，“冰箱Last On Time": "7:10:8", "Fridge Last Off Time": "23:12:36", "Freezer Last On Time": "20:9:45", "Freezer Last Off Time": “7:55:12”

您是否发布过文本，也许我看起来更近了，您只需要转换整数即可。所以我改变了我的答案