首次在mac os 下，用pip install MySQL-Python时经常出现如下错误：

sh: mysql_config: command not found
Traceback (most recent call last):
  File "setup.py", line 15, in <module>
    metadata, options = get_config()
  File "/Users/***/Downloads/MySQL-python-1.2.3/setup_posix.py", line 43, in get_config
    libs = mysql_config("libs_r")
  File "/Users/***/Downloads/MySQL-python-1.2.3/setup_posix.py", line 24, in mysql_config
    raise EnvironmentError("%s not found" % (mysql_config.path,))
EnvironmentError: mysql_config not found

经过一翻百度查找，百度表示它知道的解决方法一概都不可行，经过一番尝试，真正的解决方法应该是：

去mysql官网，下载

http://dev.mysql.com/downloads/mysql/

mysql并且安装

安装完成后，打开终端，输入下方语句修改环境变量：

PATH="$PATH":/usr/local/mysql/bin

好了，现在重启终端，并输入

pip install mysql-python

然后问题就顺利解决了。