NameError: name 'app' is not defined with Flask

Question

I have the following structure in my project

\ myapp
    \ app
       __init__.py
       views.py
    run.py

And the following code:

run.py

from app import create_app

if __name__ == '__main__':
    app = create_app()
    app.run(debug=True, host='0.0.0.0', port=5001)

views.py

@app.route("/")
def index():
    return "Hello World!"

_init_.py

from flask import Flask


def create_app():
    app = Flask(__name__)
    from app import views
    return app

I'm trying to use the factory design pattern to create my app objects with different config files each time, and with a subdomain dispatcher be able to create and route different objects depending on the subdomain on the user request.

I'm following the Flask documentation where they talk about, all of this:

• Application Context
• Applitation Factories
• Application with Blueprints
• Application Dispatching

But I couldn't make it work, it seems that with my actual project structure there are no way to pass throw the app object to my views.py and it throw and NameError

NameError: name 'app' is not defined

Solution

After do what Miguel suggest (use the Blueprint) everything works, that's the final code, working:

_init.py_

...

def create_app(cfg=None):
    app = Flask(__name__)
    from api.views import api
    app.register_blueprint(api)
    return app

views.py

from flask import current_app, Blueprint, jsonify
api = Blueprint('api', __name__)

@api.route("/")
def index():
     # We can use "current_app" to have access to our "app" object
     return "Hello World!"