title: Keras "class_weights" parameter usable for regression?
body: <p>I am training a Sequential model for regression. I noticed there is a "class_weights" parameter in the fitting function. </p>
  
  <p>As I understand one can give a different importance to a class during training. 
  But as the name states "class" I am not sure if this will only work with classification approach. </p>
  
  <p>Is something like this possible with the regression approach?</p>