Clase conexion con base de datos

database.py

class Database:
    def __init__(self, **kwargs):
        self.username = kwargs.get('username')
        self.password = kwargs.get('password')
        self.database = kwargs.get('database')
        self.host = kwargs.get('host')
        self.port = kwargs.get('port')
        self.driver = kwargs.get('driver')
        self.uri = f"{self.driver}://{self.username}:{self.password}@{self.host}:{self.port}/{self.database}?charset=utf-8"

        self.engine = create_engine(self.uri)
        self.connection = self.engine.connect()
        self.metadata = MetaData(bind=self.engine)
        self.session = Session(bind=self.connection)

    def fetch_all(self, query, *args, **kwargs):
        return self.connection.execute(text(query), *args, **kwargs)