python与mysql交互中的各种坑

Posted 2021-01-11 kailicard

开始学python 交互MySQLdb，踩了很多坑

第一个

%d format: a number is required, not str

参照以下博客：

https://blog.csdn.net/u011878172/article/details/72599120

# -*- coding: utf-8 -*-

import MySQLdb

try:

conn=MySQLdb.connect(host=‘localhost‘,port=‘3306‘,db=‘test‘,user=‘root‘,passwd=‘toor‘,charset=‘utf-8‘)

csl=conn.cursor()

count=csl.execute("inser into stu(stu_id,stu_name,stu_phone,stu_hometown) values(‘0003‘,‘kj‘,‘19564832601‘,河北)")

print count

conn.commit()

csl.close()

conn.close()

except Exception,e:

print e.message

an integer is required (got type str)

port=3306即可

(1129, "Host ‘192.168.65.1‘ is blocked because of many connection errors; unblock with ‘mysqladmin flush-hosts‘")

mysql -u root -p 进入数据库

show variables like ‘max_connect_errors‘;

查看最大连接数

set global max_connect_errors = 1000;

修改max_connect_errors的值：

(3)查看是否修改成功

> show variables like ‘%max_connect_errors%‘;

解决方法2：使用mysqladmin flush-hosts 命令清理一下hosts文件

(1)在查找到的目录下使用命令修改：mysqladmin -u xxx -p flush-hosts

或者

> flush hosts;

解决方法3：重启mysqld

也可以在重启之前，在配置文件中将该参数调大。

# vi /etc/my.cnf

max_connect_errors = 100