AttributeError: 'Tensor' object has no attribute '_keras_history'

Question

I looked for all the \"\'Tensor\' object has no attribute ***\" but none seems related to Keras (except for TensorFlow: AttributeError: 'Tensor' object has no attrib

Answer 1

@'Maëva LC': I can't post a comment, this answers your None issue.

but the code is working fine without the line

model1_out = (lambda x: K.round(x), output_shape=...)(model1_out)

and not anything else. Anyway, thank you for trying.

Function round() is not differentiable, hence the gradient is None. I suggest you just remove the line.