Flask Blueprint; No module found named - flask

Question

I'm trying to get Flask Blueprints running in Docker, but having issues with registering Blueprints correct.
I have the following structure:
├── docker-compose.yml
├── nginx
│   ├── Dockerfile
│   └── sites-enabled
│   └── flask_project
└── web
├── Dockerfile
├── __init__.py
├── app.py
├── modules
│   ├── __init__.py
│   └── page
│   ├── __init__.py
│   ├── forms.py
│   ├── models.py
│   ├── views.py
├── requirements.txt
├── static
│   ├── css
│   │   ├── bootstrap.min.css
│   │   └── main.css
│   ├── img
│   └── js
│   └── bootstrap.min.js
└── templates
├── _base.html
└── index.html
app.py contains:
from flask import Flask
from web.modules.page import simple_page
app = Flask(__name__)
app.register_blueprint(simple_page)
if __name__ == '__main__':
print app.url_map
app.run(debug=True)
views.py contains:
from flask import Blueprint
simple_page = Blueprint('simple_page', __name__,
template_folder='templates')
#simple_page.route('/')
def index():
return "Hello world"
__init__.py under page:
from web.modules.page.views import simple_page
The __init__.py files are empty.
The console gives an ImportError: No module named web.modules.page
Thanks for your time.

Answer 1

Look like is structure problem, you can reference from here: https://www.digitalocean.com/community/tutorials/how-to-structure-large-flask-applications
The following is my example, hope it can help for you:
├── app
│   ├── __init__.py
│   ├── main
│   │   ├── __init__.py
│   │   └── views.py
│   ├── models
│   │   └── __init__.py
│   ├── static
│   │   ├── css
│   │   ├── js
│   │   ├── img
│   │   └── file
│   ├── templates
│   │   └── index.html
└── master.py
app/__init__.py
from flask import Flask
from app.main import main
def create_app():
app = Flask(__name__)
app.register_blueprint(main)
return app
app/main/__init__.py
from flask import Blueprint
main = Blueprint('main', __name__)
from app.main import views
master.py
from app import create_app
if __name__ == '__main__':
app = create_app()
app.run(host='0.0.0.0', port=8000, threaded=True)