title: What is the meaning of "trainable_weights" in Keras?
body: <p>If I freeze my base_model with <code>trainable=false</code>, I get strange numbers with <code>trainable_weights</code>.</p>
  
  <p>Before freezing my model has 162 <code>trainable_weights</code>. After freezing, the model only has 2. I tied 2 layers to the pre-trained network. Does <code>trainable_weights</code> show me the layers to train? I find the number weird, when I see 2,253,335 Trainable params.</p>