Keras 错误“您必须使用 dtype bool 为占位符张量‘bidirectional_1/keras_learning_phase’提供一个值" [英] Keras error "You must feed a value for placeholder tensor 'bidirectional_1/keras_learning_phase' with dtype bool"

问题描述

我收到以下代码片段的以下错误:

I get the following error for the code snippet below:

您必须为占位符张量提供一个值'bidirectional_1/keras_learning_phase' 与 dtype bool

You must feed a value for placeholder tensor 'bidirectional_1/keras_learning_phase' with dtype bool

如果我添加 dropout 层 model.add(Dropout(dropout))，它会起作用.有谁知道为什么?后端是Tensorflow，Keras 2.0.1

If I add the dropout layer model.add(Dropout(dropout)), it works. Anyone knows why? The back-end is Tensorflow, Keras 2.0.1

def prep_model1(embedding_layer1, embedding_layer2, dropout=0.5):

    model0 = Sequential()  
    model0.add(embedding_layer1)
    model0.add(Bidirectional(LSTM(128, return_sequences=False, dropout=dropout)))

    model1 = Sequential() 
    model1.add(embedding_layer2)
    model1.add(Bidirectional(LSTM(128, return_sequences=False, dropout=dropout)))

    model = Sequential()
    model.add(Merge([model0, model1], mode='concat', concat_axis=1))
    #model.add(Dropout(dropout))
    model.add(Dense(1, activation='sigmoid'))

    return model

推荐答案

尝试导入 K 并在您的模型之前设置学习阶段.

Try to import K and set learning phase before your model.

from keras import backend as K

K.set_learning_phase(1) #set learning phase

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