code: def relu_deriv(y, d_y):
      return tfe.select(y <= 0, d_y, 0)
  
file_path: tf-encrypted/tf_encrypted/keras/activations.py
imports: import tf_encrypted
label_desc: Use image node_id 2 for calling a global function with example usage: relu_deriv(y, d_y) and returns: tfe