everything you need and nothing you don’t. By default, Flask does not include a database abstraction layer, form validation or anything else where different libraries already exist that can handle that. Instead design decisions appropriate for your project. Flask will continue to provide a very simple glue layer to the best that Python has to offer. You can implement advanced patterns in SQLAlchemy or another Application Dispatching), but your applications will have separate configs and will be managed at the WSGI layer. Blueprints instead provide separation at the Flask level, share application config, and can change

everything you need and nothing you don’t. By default, Flask does not include a database abstraction layer, form validation or anything else where different libraries already exist that can handle that. Instead design decisions appropriate for your project. Flask will continue to provide a very simple glue layer to the best that Python has to offer. You can implement advanced patterns in 3 Flask Documentation Application Dispatching), but your applications will have separate configs and will be managed at the WSGI layer. Blueprints instead provide separation at the Flask level, share application config, and can change