def define_instacart_db(db):
    """
    Add the instacart database tables as attributes of the Database class.
    """
    db.departments = db.tables['departments']
    db.orders = db.tables['orders']
    db.aisles = db.tables['aisles']
    db.order_products__prior = db.tables['order_products__prior']
    db.products = db.tables['products']
    db.order_products__train = db.tables['order_products__train']
    db.orders_test = db.tables['orders_test']
    db.orders_no_tests = db.tables['orders_no_tests']
