Blueprints

Even though many basic apps don’t require them I recommend looking into using blueprints to structure your app.

The benefits inclue:

• Easier to follow code with related views kept together
• Code re-usability, blueprints are very self contained (e.g.g templates and behaviour such as authentication)

Creating a blueprint involves:

1. Using flask.Blueprint instead of flask.Flask for your blueprint
2. Registering it in your app using app.register_blueprint

Code

Blueprints let you compose your application from components

pythonie.blueprints.blueprints.index()

Yet another hello world, but this time inside a blueprint

To see in action go to http://building-webapps-with-flask.herokuapp.com/blueprints/

For reference here’s the application index (and implied link back to the source). You’ll notice some use of configuration in that code too.

pythonie.application.index()

To see this in action go to http://building-webapps-with-flask.herokuapp.com/

URLs

GET /blueprints/

Yet another hello world, but this time inside a blueprint

To see in action go to http://building-webapps-with-flask.herokuapp.com/blueprints/

GET /

To see this in action go to http://building-webapps-with-flask.herokuapp.com/