old_contents: from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  from flask_alembic import Alembic
  
  app = Flask(__name__)
  app.config.from_object('config')
  
  db = SQLAlchemy(app)
  
  alembic = Alembic()
  alembic.init_app(app)
  
  from app import views, models
new_contents: from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  
  app = Flask(__name__)
  app.config.from_object('config')
  
  db = SQLAlchemy(app)
  
  alembic = Alembic()
  alembic.init_app(app)
  
  from app import views, models
subject: Remove from flask_alembic