python - Keras错误: TypeError: 'int' object is not iterable

Question

CONST_TRAINTING_SEQUENCE_LENGTH = 12

CONST_TESTING_CASES = 5


def dataNormalization(data):
    return [(datum - data[0]) / data[0] for datum in data]


def dataDeNormalization(data, base):
    return [(datum + 1) * base for datum in data]


def getDeepLearningData(ticker):
    # Step 1. Load data
    data = pandas.read_csv('/Users/yindeyong/Desktop/Django_Projects/pythonstock/data/Intraday/' + ticker + '.csv')[
        'close'].tolist()

    # Step 2. Building Training data
    dataTraining = []
    for i in range(len(data) - CONST_TESTING_CASES * CONST_TRAINTING_SEQUENCE_LENGTH):
        dataSegment = data[i:i + CONST_TRAINTING_SEQUENCE_LENGTH + 1]
        dataTraining.append(dataNormalization(dataSegment))

    dataTraining = numpy.array(dataTraining)
    numpy.random.shuffle(dataTraining)
    X_Training = dataTraining[:, :-1]
    Y_Training = dataTraining[:, -1]

    # Step 3. Building Testing data
    X_Testing = []
    Y_Testing_Base = []
    for i in range(CONST_TESTING_CASES, 0, -1):
        dataSegment = data[-(i + 1) * CONST_TRAINTING_SEQUENCE_LENGTH:-i * CONST_TRAINTING_SEQUENCE_LENGTH]
        Y_Testing_Base.append(dataSegment[0])
        X_Testing.append(dataNormalization(dataSegment))

    Y_Testing = data[-CONST_TESTING_CASES * CONST_TRAINTING_SEQUENCE_LENGTH:]

    X_Testing = numpy.array(X_Testing)
    Y_Testing = numpy.array(Y_Testing)

    # Step 4. Reshape for deep learning
    X_Training = numpy.reshape(X_Training, (X_Training.shape[0], X_Training.shape[1], 1))
    X_Testing = numpy.reshape(X_Testing, (X_Testing.shape[0], X_Testing.shape[1], 1))

    return X_Training, Y_Training, X_Testing, Y_Testing, Y_Testing_Base


def predictLSTM(ticker):
    # Step 1. Load data

    X_Training, Y_Training, X_Testing, Y_Testing, Y_Testing_Base = getDeepLearningData(ticker)

    # Step 2. Build model
    model = Sequential()

    model.add(LSTM(
        input_shape=1,
        output_dim=50,
        return_sequences=True))
    model.add(Dropout(0.2))

    model.add(LSTM(
        200,
        return_sequences=False))
    model.add(Dropout(0.2))

    model.add(Dense(output_dim=1))
    model.add(Activation('linear'))

    model.compile(lose='mse', optimizer='rmsprop')

    # Step 3. Train model
    model.fit(X_Training, Y_Training,
              batch_size=512,
              nb_epoch=5,
              validation_split=0.05)


predictLSTM(ticker='MRIN')

我收到一个错误:

文件“/Users/yindeyong/Desktop/Django_Projects/envs/stockenv/lib/python3.6/site-packages/keras/engine/base_layer.py”，第 147 行，init batch_size,) + tuple(kwargs['input_shape']) 类型错误:“int”对象不可迭代

我尝试将 input_shape=1 更改为 input_shape=(1,)，然后收到另一个错误:

ValueError:输入 0 与层 lstm_1 不兼容:预期 ndim=3，发现 ndim=2

Answer 1

LSTM 是处理序列的循环网络

序列必须具有长度和特征，您的输入形状必须包含这两个:input_shape=(length, features)。

您的数据还必须使用(序列、长度、特征)进行相应的调整。

对于可变长度，您可以使用input_shape=(None,features)。