bla.py

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_wtf.csrf import CSRFProtect
from flask_ckeditor import CKEditor
from .config import config

db = SQLAlchemy()
login_manager = LoginManager()
# login_manager.login_view = 'view.login'
ckeditor = CKEditor()
csrf = CSRFProtect()

def create_app(config_name):
    app = Flask(__name__)
    app.config.from_object(config[config_name])
    config[config_name].init_app(app)
    db.init_app(app)
    ckeditor.init_app(app)
    csrf.init_app(app)
    login_manager.init_app(app)
    from .views import view
    app.register_blueprint(view)

    return app