Keras モデルのレイヤー出力にアクセスするにはどうすればよいですか?

from keras import backend as K

# Define input and layer outputs
input = model.input
outputs = [layer.output for layer in model.layers]

# Create a function to evaluate the output
fn = K.function([input, K.learning_phase()], outputs)

# Testing
test_input = np.random.random(input_shape)[np.newaxis,...]
layer_outputs = fn([test_input, 1.])

# Print the layer outputs
print(layer_outputs)

fn = K.function([input, K.learning_phase()], outputs)

# Testing
test_input = np.random.random(input_shape)[np.newaxis,...]
layer_outputs = fn([test_input, 1.])

# Print the layer outputs
print(layer_outputs)