After the superset installation, PIP Install MysqlClient was required to connect to the database, but it would report an error. At first, I found several methods on the Internet, but found none of them matched my problem.
yum install mysql-devel
yum install python-devel
yum install python-devel
yum install mysql-devel
yum install python-devel
After the installation is complete, proceed to
PIP install mysqlclient
problem solved!