我在為我的應用程序實現 Flask-MQTT 庫而苦苦掙扎。SQLAlchemy 等工作正常，但 flask-mqtt 拋出錯誤AttributeError: module 'app.mqtt' has no attribute 'init_app'。在 Flask-MQTT 的官方文檔中，他們以相同的方式構建了 create_app() 方法（https://flask-mqtt.readthedocs.io/en/latest/usage.html）如果有人可以幫助我，那就太好了！非常感謝__init__.pyfrom flask import Flaskfrom flask_restful import Apifrom flask_mqtt import Mqttfrom flask_sqlalchemy import SQLAlchemyfrom flask_marshmallow import Marshmallowfrom flask_jwt_extended import JWTManagermqtt = Mqtt()api = Api()db = SQLAlchemy()ma = Marshmallow()jwt = JWTManager()def create_app(config):    app = Flask(__name__)    app.config.from_object(config.DevelopmentConfig)    mqtt.init_app(app)    db.init_app(app)    api.init_app(app)    ma.init_app(app)    jwt.init_app(app)    return appfrom app.mqtt import mqttclient運行.pyfrom app import create_appimport configfrom flask_migrate import Migrateapp = create_app(config)migrate = Migrate(app, db)app.config['MQTT_BROKER_URL'] = 'hivemq'app.config['MQTT_BROKER_PORT'] = 1883app.config['MQTT_USERNAME'] = ''app.config['MQTT_PASSWORD'] = ''app.config['MQTT_KEEPALIVE'] = 5app.config['MQTT_TLS_ENABLED'] = Falseif __name__ == '__main__':    app.run(host='0.0.0.0', port=5003, threaded=True)錯誤：mqttservice    | Traceback (most recent call last):mqttservice    |   File "run.py", line 5, in <module>mqttservice    |     app = create_app(config)mqttservice    |   File "/code/app/__init__.py", line 18, in create_appmqttservice    |     mqtt.init_app(app)mqttservice    | AttributeError: module 'app.mqtt' has no attribute 'init_app'