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# https://stackoverflow.com/questions/42327006/how-to-calculate-top5-accuracy-in-keras

# top_k default to be 5
model.compile('adam', 'categorical_crossentropy', ['accuracy', 'top_k_categorical_accuracy'])

# set k to 3
top3_acc = functools.partial(keras.metrics.top_k_categorical_accuracy, k=3)
top3_acc.__name__ = 'top3_acc'
model.compile('adam', 'categorical_crossentropy', ['accuracy', top3_acc])