mysql数据库-5-1-pymysql操作mysql

pymysql连接mysql

import pymysql

def favorite_colors():
    config = {
        'user': 'root',
        'password': 'root',
        'host': 'db',
        'port': '3306',
        'database': 'knights'
    }
    connection = pymysql.connect(**config)
    cursor = connection.cursor()
    cursor.execute('SELECT * FROM favorite_colors')
    results = [{name: color} for (name, color) in cursor]
    cursor.close()
    connection.close()

    return results

事务操作

try:
    cursor.execute(sql_1)
    cursor.execute(sql_2)
    cursor.execute(sql_3)
except Exception as e:
    connect.rollback() # 事务回滚
    print('事务处理失败', e)
else:
    connect.commit() # 事务提交
    print('事务处理成功', cursor.rowcount)# 关闭连接
    cursor.close()
    connect.close()