ImportError: No module named MySQLdb
Or try this:
apt-get install python-mysqldb
If you're having issues compiling the binary extension, or on a platform where you cant, you can try using the pure python PyMySQL
bindings.
Simply pip install pymysql
and switch your SQLAlchemy URI to start like this:
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://.....'
There are some other drivers you could also try.