Error of migration, Flask

Question

is appearing, "Nameerror: name 'app' is not defined" my codic

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_script import Manager
from flask_migrate import Migrate, MigrateCommand

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///storage.db'
db = SQLAlchemy(app)
migrate = Migrate(app, db)
manager = Manager(app) 
manager.add_command('db', MigrateCommand)

from app.controllers import default

from app import manager


if __name__ == '__main__':
 manager.run()

Answer 1

It became a little complicated to understand your code, but by the error to realize that your application "app" is not being defined, so the problem lies in creating the instance of the Flask object. From what I understand, you wrote:

app = Flask(name)

In fact, the right thing would be:

app = Flask(__name__)

That’s why he can’t create the app.