如何修复函数中的“未定义”错误

Question

我正在创建一个函数作为GRU练习的一部分，以更多地了解python和GRU。我似乎遇到名称错误。

我已经阅读了许多有关在python中定义项目的文章，但是我认为我已经在其后的代码中对此进行了明确定义。

    def workflow(EV_data, get_split, train_model, get_rmse,n_train = 250,n_test = 50,look_back = 1):
    gX_train, gY_train, gX_test, gY_test, scaler, start_point = get_split(EV_data, n_train, n_test)

    model = train_model(gX_train, gY_train, gX_test, gY_test)

    RMSE, predictions = get_rmse(model, gX_test, gY_test, scaler, start_point, EV_data, n_train)

return RMSE, predictions

错误：

NameError: name 'predictions' is not defined

Answer 1

所有内容都应该在函数定义块中。我试过了，并且编译正确：

def workflow(EV_data, get_split, train_model, get_rmse,n_train = 250,n_test = 50,look_back = 1):
    gX_train, gY_train, gX_test, gY_test, scaler, start_point = get_split(EV_data, n_train, n_test)

    model = train_model(gX_train, gY_train, gX_test, gY_test)

    RMSE, predictions = get_rmse(model, gX_test, gY_test, scaler, start_point, EV_data, n_train)

    return RMSE, predictions