1. Mac 下载MySQL
brew update
brew install mysql
2. 安装MySQL-Python
pip install MySQL-Python
3. 启动&关闭MySQL
$ which mysql
mbp:~ tianzhaixing$ which mysql
/usr/local/bin/mysql
mbp:~ tianzhaixing$ cd /usr/local/bin
mbp:bin tianzhaixing$ ./mysqld_safe &
[1] 11985
mbp:bin tianzhaixing$ 151219 10:29:06 mysqld_safe Logging to '/usr/local/var/mysql/mbp.local.err'.
151219 10:29:06 mysqld_safe Starting mysqld daemon with databases from /usr/local/var/mysql
mbp:bin tianzhaixing$ pwd
/usr/local/bin
mbp:bin tianzhaixing$ ./mysqladmin -u root -p shutdown
Enter password:
151219 10:29:36 mysqld_safe mysqld from pid file /usr/local/var/mysql/mbp.local.pid ended
[1]+ Done ./mysqld_safe
注意：
> Enter password: 有时候直接回车就可以。如果不行，再输入密码。
> 使用Python 链接MySQL前，要先启动MySQL；
> 使用后，再关闭MySQL。
Q: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
A: $ mysql.server start
...
