OSX下mysql、pymysql的安装使用

OSX下mysql安装较为简单，mysql官网下载地址http://dev.mysql.com/downloads/mysql/
选择OSX版本安装
TIPS：默认新版mysql在OSX下的配置文件/etc/my.cnf不存在，其他默认路径下也没有，需自行添加。

因python3支持问题，使用pymysql替代MySQLdb、mysqlclient-python连接数据库,github主页见
https://github.com/PyMySQL/PyMySQL

安装$ pip3 install PyMySQL
使用方法示例

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 ;

import pymysql.cursors
connection = pymysql.connect(host=\'localhost\',
                             user=\'user\',
                             password=\'passwd\',
                             db=\'db\',
                             charset=\'utf8mb4\',
                             cursorclass=pymysql.cursors.DictCursor)
    with connection.cursor() as cursor:
        # Create a new record
        sql = \"INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)\"
        cursor.execute(sql, (\'webmaster@python.org\', \'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, (\'webmaster@python.org\',))
        result = cursor.fetchone()
        print(result)
finally:
    connection.close()