因为之前不是用brew安装的mysql，应该是dmg安装的，所以会遇到这些bug

bug1

sh: mysql_config: command not found 
Traceback (most recent call last): 
File "<string>", line 1, in <module> 
File "/private/var/folders/84/tt1r35xn0975cwkmjny600yw0000gn/T/pip-install-76eXOV/mysqlclient/setup.py", line 17, in <module> 
metadata, options = get_config() 
File "setup_posix.py", line 44, in get_config 
libs = mysql_config("libs_r") 
File "setup_posix.py", line 26, in mysql_config 
raise EnvironmentError("%s not found" % (mysql_config.path,)) 
EnvironmentError: mysql_config not found

1. 首先看看自己有没有mysql_config: 
   在终端:which mysql_config 
   如果没有，先解决mysql_config的问题。

2. 用brew安装mysql-connector-c: 
   brew install mysql-connector-c

3. 这时候再试着安装，应该会遇到这个bug:

bug_2

Complete output from command python setup.py egg_info: 
Traceback (most recent call last): 
File "<string>", line 1, in <module> 
File "/private/var/folders/84/tt1r35xn0975cwkmjny600yw0000gn/T/pip-install-ZwTuc6/mysqlclient/setup.py", line 17, in <module> 
metadata, options = get_config() 
File "setup_posix.py", line 54, in get_config 
libraries = [dequote(i[2:]) for i in libs if i.startswith('-l')] 
File "setup_posix.py", line 12, in dequote 
if s[0] in "\"'" and s[0] == s[-1]: 
IndexError: string index out of range 
---------------------------------------- 
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/84/tt1r35xn0975cwkmjny600yw0000gn/T/pip-install-ZwTuc6/mysqlclient/

按照下图方法修改mysql_config即可 

不需要重新安装数据库！！ 也不需要手动安装pip包~~哇

网上找了好久，试过很多种方式，pip和源码安装，最终还是在源码安装方式下成功，文章内容转载于

https://blog.****.net/fanjialiang2401/article/details/80455484