无法将符号张量 (lstm/strided_slice:0) 转换为 numpy 数组

Question

我希望有人回答以下错误代码，我正在研究有监督的 ML，但遇到了错误。

我的库详细信息（由于我将上述软件包都降级为上面提到的当前软件包详细信息，许多开发人员说要降级它可以工作的版本，但在我的情况下它不起作用）：

• Numpy : 1.18.5 当前版本（之前是 1.20.3）
• TensorFlow：2.5.0 当前版本（之前是 2.4.1）
• Python：3.8.8
• Keras：2.4.3

代码如下：

# Defining the LSTM model to be fit
model = Sequential()
model.add(LSTM(85, input_shape=(1, 53)))
model.add(Dense(1))
model.compile(loss='mae', optimizer='adam')
# Fitting the model
history = model.fit(train_X, train_y, epochs=70, batch_size=175, validation_data=(test_X, test_y), verbose=2, shuffle=False)
# Plotting the training progression
pyplot.plot(history.history['loss'], label='train')
pyplot.plot(history.history['val_loss'], label='test')
pyplot.legend()
pyplot.show()

还有错误：

NotImplementedError                       Traceback (most recent call last)
<ipython-input-10-251aaaf9021e> in <module>
      1 # Defining the LSTM model to be fit
      2 model = Sequential()
----> 3 model.add(LSTM(85, input_shape=(train_X.shape[1], train_X.shape[2])))
      4 model.add(Dense(1))
      5 model.compile(loss='mae', optimizer='adam')

 NotImplementedError: Cannot convert a symbolic Tensor (lstm_2/strided_slice:0) to a numpy array. 
   This error may indicate that you're trying to pass a Tensor to a NumPy call, which is not supported

Answer 1

在添加依赖于层input_shape的LSTM模型时得到了解决方案，因此将形状更改为

model = Sequential()
model.add(LSTM(85, input_shape=(train_X.shape[1], train_X.shape[2])))
model.add(Dense(1))
model.compile(loss='mae', optimizer='adam')

# Fitting the model
history = model.fit(train_X, train_y, epochs=70, batch_size=175, validation_data=(test_X, test_y), verbose=2, shuffle=False)
# Plotting the training progression
pyplot.plot(history.history['loss'], label='train')
pyplot.plot(history.history['val_loss'], label='test')
pyplot.legend()
pyplot.show()