Flask: How to use app context inside blueprints?

Question

I'm learning flask and python and cannot wrap my head around the way a typical flask application needs to be structured. I need to access the app config from inside blueprint. Something like this ``` #blueprint.py from flask import Blueprint sample_blueprint = Blueprint("sample", __name__) # defining a route for this blueprint @sample_blueprint.route("/") def index(): # !this is the problematic line # need to access some config from the app x = app.config["SOMETHING"] # how to access app inside blueprint? ``` If importing app in blueprint is the solution, will this not result in circulat imports? i.e importing blueprint in app, importing app in blueprints?

Accepted Answer

From the docs about appcontext:

The application context is what powers the current_app context local

Applied to your example:

```
from flask import Blueprint, current_app

sample = Blueprint('sample', __name__)

@sample.route('/')
def index():
    x = current_app.config['SOMETHING']
```

For reference here is a small gist I put together, as mentioned in the comments.

Flask: How to use app context inside blueprints?

Solution

Problem