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我正在尝试使用 Keras 设置梯度下降过程,但我不断收到错误消息:

from keras import backend as K 

grads = K.gradients(loss, combination_image)[0]
fetch_loss_and_grads = K.function([combination_image], [loss, grads])

这是我的错误信息:

tf.gradients is not supported when eager execution is enabled. Use tf.GradientTape instead.
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