在 mac 上安装 mysqlclient 遇到了一些问题，查找资料很多人都遇到了同样的问题。通过资料和试验，成功了。这里记录一下，希望帮到遇到同样问题的人。
本人使用python3， 安装步骤如下：
brew install mysql-connector-c pip3 install mysqlclient
当执行 pip3 install mysqlclient 是出现错误：
➜ /usr/local/Cellar/mysql-connector-c/6.1.11/bin >pip3 install mysqlclient
Collecting mysqlclient
Using cached mysqlclient-1.3.12.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/2w/56bgkvqd1xldl56fx_gx_fg00000gn/T/pip-build-f9admsgv/mysqlclient/setup.py", line 17, in <module>
metadata, options = get_config()
File "/private/var/folders/2w/56bgkvqd1xldl56fx_gx_fg00000gn/T/pip-build-f9admsgv/mysqlclient/setup_posix.py", line 54, in get_config
libraries = [dequote(i[2:]) for i in libs if i.startswith('-l')]
File "/private/var/folders/2w/56bgkvqd1xldl56fx_gx_fg00000gn/T/pip-build-f9admsgv/mysqlclient/setup_posix.py", line 54, in <listcomp>
libraries = [dequote(i[2:]) for i in libs if i.startswith('-l')]
File "/private/var/folders/2w/56bgkvqd1xldl56fx_gx_fg00000gn/T/pip-build-f9admsgv/mysqlclient/setup_posix.py", line 12, in dequote
if s[0] in "\"'" and s[0] == s[-1]:
IndexError: string index out of range
----------------------------------------
解决方案：mysql_config (bin)
执行：vim mysql_config，搜索 libs，或者114行，替换为115行即可
112 # Create options 113 libs="-L$pkglibdir" 114 #libs="$libs -l " ##源代码 115 libs="$libs -lmysqlclient -lssl -lcrypto " ##修改成这样
再次执行pip3 install mysqlclient，成功了。如下所示：
➜ /usr/local/Cellar/mysql-connector-c/6.1.11/bin >pip3 install mysqlclient Collecting mysqlclient Using cached mysqlclient-1.3.12.tar.gz Building wheels for collected packages: mysqlclient Running setup.py bdist_wheel for mysqlclient ... done Stored in directory: /Users/kk/Library/Caches/pip/wheels/df/bb/60/bf7c315cbe163515db1c846e4ffa5557dd785c82e82f3492e8 Successfully built mysqlclient Installing collected packages: mysqlclient Successfully installed mysqlclient-1.3.12