How to use blueprints in Azure functions v2 for python?

In looking at the guide What do blueprints offer that just importing doesn't?

Here are some points that are unclear:

• It says to have a file called http_blueprint.py in which you'd define some routes but it just looks like the regular http trigger but the decorator is a bp.route instead of an app.route. Are these also app.functions since the main file has 2 decorators per def?

• Does everything in the blueprint have to be an http trigger or is that just an example that they used?

• Can you have multiple blueprint files or are we limited to the single one?