Plotting learning curve in keras gives KeyError: 'val_acc'

Question

I was trying to plot train and test learning curve in keras, however, the following code produces KeyError: \'val_acc error.

The official document

Answer 1

I have changed acc to accuracy and my problem solved. Tensorflow 2+

e.g.

accuracy = history_dict['accuracy']
val_accuracy = history_dict['val_acccuracy']

Answer 2

to get any val_* data (val_acc, val_loss, ...), you need to first set the validation.

first method (will validate from what you give it):

model.fit(validation_data=(X_test, Y_test))

second method (will validate from a part of the training data):

model.fit(validation_split=0.5)