python3 连接mysql数据库

准备工作:
1.在本地虚拟机172.16.0.115上安装mysql，并设置权限如下

mysql>  grant all privileges on *.* to root@"%" Identified by "Mypassword4!";
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

2.在pycharm所在ubuntu虚拟机上验证是否可以访问172.16.0.115上的mysql

hanli@ubuntu:~$ mysql -h 172.16.0.115 -u root -pMypassword4!`

3.代码如下：

import mysql.connector

# 连接到数据库:
conn = mysql.connector.connect(host='172.16.0.115', 
user='root', password='Mypassword4!', database='test')
# 连接到数据库后，需要打开游标，称之为Cursor，通过Cursor执行SQL语句，然后，获得执行结果
cursor = conn.cursor()
# 创建user表:
cursor.execute('create table user (id varchar(20) primary key, name varchar(20))')
# 插入一行记录，注意MySQL的占位符是%s:
cursor.execute('insert into user (id, name) values (%s, %s)', ('1', 'Michael'))
print('rowcount =', cursor.rowcount)
# 提交事务:
conn.commit()
cursor.close()

# 运行查询:
cursor = conn.cursor()
cursor.execute('select * from user where id = %s', ('1',))
values = cursor.fetchall()
print(values)
# 关闭Cursor和Connection:
cursor.close()
conn.close()

执行结果：

rowcount = 1
[('1', 'Michael')]