python pymysql实例_知识库 : pymysql示例

1.简介

2.依赖环境

3.安装

4.示例

1.简介

pymysql是一个python模块，是一个纯python的mysql客户端库，pymysql的目标是替代安装繁琐的MySQLdb，并使之能在CPython、PyPy、IronPython上使用。

2.依赖环境

pymysql是纯python的mysql客户端库，只要求用户有python解释器和mysql服务，依赖环境如下：

Python -- one of the following:CPython >= 2.6 or >= 3.3

PyPy >= 2.3

IronPython 2.7

MySQL Server -- one of the following:MySQL >= 4.1

MariaDB >= 5.1

3.安装

pymysql是纯python编写的，所以安装特别简单，只需要：$ pip install PyMySQL

也可以从源码安装(推荐只在pip无法安装时采用这种方式)：$ # X.X is the desired PyMySQL version (e.g. 0.5 or 0.6).

$ curl -L https://github.com/PyMySQL/PyMySQL/tarball/pymysql-X.X | tar xz

$ cd PyMySQL*

$ python setup.py install

$ # The folder PyMySQL* can be safely removed now.

4.示例

首先在mysql中建表：CREATE TABLE `users` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`email` varchar(255) COLLATE utf8_bin NOT NULL,

`password` varchar(255) COLLATE utf8_bin NOT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin

AUTO_INCREMENT=1 ;

下面是插入和查询示例：import pymysql.cursors

# Connect to the database

connection = pymysql.connect(host='localhost',

user='user',

passwd='passwd',

db='db',

charset='utf8mb4',

cursorclass=pymysql.cursors.DictCursor)

try:

with connection.cursor() as cursor:

# Create a new record

sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"

cursor.execute(sql, ('[email protected]', 'very-secret'))

# connection is not autocommit by default. So you must commit to save

# your changes.

connection.commit()

with connection.cursor() as cursor:

# Read a single record

sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"

cursor.execute(sql, ('[email protected]',))

result = cursor.fetchone()

print(result)

finally:

connection.close()

上面示例的输出如下：{'password': 'very-secret', 'id': 1}