我正在嘗試將我的 Flask 應用程序與 MySQL 數據庫連接。這是 MySQL 數據mysql> select user();+----------------+| user()         |+----------------+| root@localhost |+----------------+1 row in set (0.01 sec)mysql> SHOW DATABASES;+--------------------+| Database           |+--------------------+| alchemy            || information_schema || mysql              || performance_schema || sys                |+--------------------+5 rows in set (0.00 sec)mysql> SHOW GLOBAL VARIABLES LIKE 'PORT';+---------------+-------+| Variable_name | Value |+---------------+-------+| port          | 3306  |+---------------+-------+1 row in set (0.01 sec)這是init.pyfrom flask import Flaskfrom config import Configfrom flask_sqlalchemy import SQLAlchemyfrom flask_migrate import Migrateapp = Flask(__name__)app.config.from_object(Config)db = SQLAlchemy(app)migrate = Migrate(app, db)from app import routes, models這是config.pyimport osbasedir = os.path.abspath(os.path.dirname(__file__))class Config(object):    SECRET_KEY = os.environ.get('SECRET_KEY') or 'test-key-motherfucker'    SQLALCHEMY_DATABASE_URI = 'mysql://[email protected]:3360/alchemy'    SQLALCHEMY_TRACK_MODIFICATIONS = False和 models.pyfrom app import dbclass Test(db.Model):    id = db.Column(db.Integer, primary_key=True)    name = db.Column(db.String(64), index=True, unique=True)    def __repr__(self):        return '<Test {}>'.format(self.name)當我嘗試初始化數據庫時flask db initflask db upgrade我收到sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:mysql我嘗試使用 pymysql SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://[email protected]:3360/alchemy'如何將mysql與sqlalchemy連接？