Question

我试图使用python脚本在MYSQL数据库中存储一些数据，但是我收到了以下错误。

mysql.connector.errors.ProgrammingError: Failed processing format-parameters; 
Python 'list' cannot be converted to a MySQL type

实际上我从netCDF文件中提取变量并尝试将它们存储在MYSQL db中。我的代码是

import sys
import collections
import os
import netCDF4
import calendar
from netCDF4 import Dataset
import mysql.connector
from mysql.connector import errorcode

table = 'rob-tabl'
con = mysql.connector.connect(user='rob', password='xxxx',
                                  database=roby)
cursor = con.cursor()


smeData = """
        CREATE TABLE rob-tabl (
        `id` bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY,
        `time.val` double,
        `time.microsec` double,
        `temp.degrees` double,
        `humid.calc` double,
        `pressure.calc` double;"""

这些是我在mMYSQL数据库中的字段/列名称。我试图将netCDF4数据插入MYSQL

smeData = "INSERT INTO `" + table + "` "
.
.
.
.
.
.
.
.
data_array = []
for item in totfiles.items(): # loop on different netCDF files in a
                               directory , but at the moment I had only one file
    nc = Dataset('filename', 'r')
    data1 = nc.variables['time'][:]
    data2 = nc.variables['microsec'][:]
    data3 = nc.variables['temperature'][:]
    data4 = nc.variables['humidity'][:]
    data5 = nc.variables['pressure'][:] 
    data = ([(data1).tolist(), (data2).tolist(), data3.tolist(), data4.tolist(), data5.tolist()])
    data_array.append(data)
    print type(data)
    for v in data_array:
        cursor.executemany(smeData, (v,))

当我打印netCDF变量数据时，例如时间变量，它看起来像此

nc.variables['time'][:] # netCDF variable

所以data1看起来像这样

[1302614127 1302614137 1302614147 ............., 1302614627 1302614647 1302614657]

和data2的微秒看起来像是

 [0 0 0..................., 0 0 0]

并且data_array看起来像这样，因为它包含五个不同的列表。

data_array=  ([1302614127 1302614137 1302614147 ..., 1302614627 1302614647
 1302614657], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [21, 22,34,34....,67,55], [12.2, 12.54, 12.55....,45.54,45.48], [0,0,0...,0,0,00])

如果我尝试执行cursor.executemany（smeData，（v，））命令，它会给我这个错误

Python 'list' cannot be converted to a MySQL type

我的MYSQL插入语法是

"INSERT INTO `rob-tabl` (`time.val`,`time.microsec`,`temp.degrees`,
`humid.calc`,`pressure.calc`) VALUES (%s,%s,%s,%s,%s)"

我在MYSQL中创建了5个列，我不得不将netCDF中的数据存储到db中如果有人帮助我或提供一些提示，我该如何处理这样的错误。这会很棒。谢谢

Answer 1

虽然我从未按照我所看到的那样使用它：

smeData = "INSERT INTO `rob-tabl` (`time.val`,`time.microsec`,`temp.degrees`, `humid.calc`,`pressure.calc`) VALUES (%s,%s,%s,%s,%s)"
cursor.executemany(smeData, data_array)

没有for循环。

mysql.connector.errors.ProgrammingError：处理格式参数失败; Python'list'无法转换为MySQL类型

1 个答案: