报错信息：
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
解决方法:
sudo apt-get install mysql-server mysql-client
然后mysql -V查看mysql是否安装成功
sudo apt-get install libmysqlclient-dev python3-dev
然后
pip install mysqlclient就不会报错找不到'mysql_config'了
