环境：纯净 python3.7 环境 + virtualenv

安装时候出现第一个问题

    ERROR: Command errored out with exit status 1:
     command: /Users/qinfei/PycharmProjects/CCGKDD/venv/bin/python3.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/setup.py'"'"'; __file__='"'"'/private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base pip-egg-info
         cwd: /private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/
    Complete output (10 lines):
    /bin/sh: mysql_config: command not found
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/setup.py", line 16, in <module>
        metadata, options = get_config()
      File "/private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/setup_posix.py", line 51, in get_config
        libs = mysql_config("libs")
      File "/private/var/folders/kx/h2w98np105d6fr4lygnstqx40000gn/T/pip-install-06eyqyl4/mysqlclient/setup_posix.py", line 29, in mysql_config
        raise EnvironmentError("%s not found" % (_mysql_config_path,))
    OSError: mysql_config not found
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

安装

brew install mysql-connector-c  

按照说明设置环境变量

If you need to have mysql-client first in your PATH run:
  echo 'export PATH="/usr/local/opt/mysql-client/bin:$PATH"' >> ~/.zshrc

For compilers to find mysql-client you may need to set:
  export LDFLAGS="-L/usr/local/opt/mysql-client/lib"
  export CPPFLAGS="-I/usr/local/opt/mysql-client/include"

再次安装 mysqlclient, 还是同样的错误

sudo find / -name mysql_config

>>> /System/Volumes/Data/usr/local/Cellar/mysql-client/8.0.18/bin/mysql_config

可以找到, 建立软连接

ln -s /System/Volumes/Data/usr/local/Cellar/mysql-client/8.0.18/bin/mysql_config /usr/local/bin/mysql_config

再次运行安装，竟然没有出错。搞定每次安装都会遇到渣个错误， 这次下定决心一定要记录好。供大家参考，其他操作系统版本请自行变通