__init__.py

import os
from flask import Flask

def create_app(use_config=None):
    app = Flask(__name__)
    if use_config:
        app.config.from_mapping(**use_config)

    from webui.service.main.routes import main
    app.register_blueprint(main)

    from webui.service.service.routes import service
    app.register_blueprint(service)

    return app