由于 MySQLdb 模塊還不支持 Python3.x，所以 Python3.x 如果想連接MySQL需要安裝 pymysql 模塊。

pymysql 模塊可以通過 pip 安裝。但如果你使用的是 pycharm IDE，則可以使用 project python 安裝第三方模塊。

[File] >> [settings] >> [Project: python] >> [Project Interpreter] >> [Install按鈕]

由于Python統一了數據庫連接的接口，所以 pymysql 和 MySQLdb 在使用方式上是類似的：

pymysql.Connect()參數說明

connection對象支持的方法

cursor對象支持的方法

==================MySQL===================

首先在連接數據庫之前，先創建一個交易表，方便測試 pymysql 的功能：

DROP TABLE IF EXISTS `trade`;CREATE TABLE `trade` ( `id` int(4) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(6) NOT NULL COMMENT '用戶真實姓名', `account` varchar(11) NOT NULL COMMENT '銀行儲蓄賬號', `saving` decimal(8,2) unsigned NOT NULL DEFAULT '0.00' COMMENT '賬戶儲蓄金額', `expend` decimal(8,2) unsigned NOT NULL DEFAULT '0.00' COMMENT '賬戶支出總計', `income` decimal(8,2) unsigned NOT NULL DEFAULT '0.00' COMMENT '賬戶收入總計', PRIMARY KEY (`id`), UNIQUE KEY `name_UNIQUE` (`name`)) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;INSERT INTO `trade` VALUES (1,'喬布斯','18012345678',0.00,0.00,0.00);

==================Python===================

使用Python腳本實現增刪改查和事務處理，源碼如下：

import pymysql.cursors# 連接數據庫connect = pymysql.Connect(  host='localhost',  port=3310,  user='woider',  passwd='3243',  db='python',  charset='utf8')# 獲取游標cursor = connect.cursor()# 插入數據sql = "INSERT INTO trade (name, account, saving) VALUES ( '%s', '%s', %.2f )"data = ('雷軍', '13512345678', 10000)cursor.execute(sql % data)connect.commit()print('成功插入', cursor.rowcount, '條數據')# 修改數據sql = "UPDATE trade SET saving = %.2f WHERE account = '%s' "data = (8888, '13512345678')cursor.execute(sql % data)connect.commit()print('成功修改', cursor.rowcount, '條數據')# 查詢數據sql = "SELECT name,saving FROM trade WHERE account = '%s' "data = ('13512345678',)cursor.execute(sql % data)for row in cursor.fetchall():  print("Name:%s/tSaving:%.2f" % row)print('共查找出', cursor.rowcount, '條數據')# 刪除數據sql = "DELETE FROM trade WHERE account = '%s' LIMIT %d"data = ('13512345678', 1)cursor.execute(sql % data)connect.commit()print('成功刪除', cursor.rowcount, '條數據')# 事務處理sql_1 = "UPDATE trade SET saving = saving + 1000 WHERE account = '18012345678' "sql_2 = "UPDATE trade SET expend = expend + 1000 WHERE account = '18012345678' "sql_3 = "UPDATE trade SET income = income + 2000 WHERE account = '18012345678' "try:  cursor.execute(sql_1) # 儲蓄增加1000  cursor.execute(sql_2) # 支出增加1000  cursor.execute(sql_3) # 收入增加2000except Exception as e:  connect.rollback() # 事務回滾  print('事務處理失敗', e)else:  connect.commit() # 事務提交  print('事務處理成功', cursor.rowcount)# 關閉連接cursor.close()connect.close()