title: How to save create and save submodel from keras mobilenet?
body: <p>I have create mobilenet v2 model in keras together with lambda function which gives me output from the penultimate layer. How can I save this specific submodel ( I want to convert it with tfjs-converter and use it in tensorflow-js ) ?</p>
  
  <pre><code>from keras.applications.mobilenet_v2 import MobileNetV2
  model = MobileNetV2(input_shape=None, alpha=0.35, depth_multiplier=1, include_top=True, weights='imagenet', input_tensor=None, pooling=None, classes=1000)
  get_3rd_layer_output = K.function([model.layers[0].input],
                                        [model.layers[-2].output])
  </code></pre>