0 paramters are uesd in the quantum circuit

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I have solved the problem. According to https://discuss.pennylane.ai/t/quantum-neural-networks-quanvolutional-nn/1111/7 and https://discuss.pennylane.ai/t/transfer-learning-with-pretrained-keras-model/1462/10. I add this code

model(X_train[:2])

behind

model = keras.Model(inputs=input, outputs=output)

Althought I don’t know the reason, it works. :smiley:

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