code: def compute_auc(y_true, y_pred):
      try:
          return roc_auc_score(y_true, y_pred)
      except ValueError:
          return np.nan
  
label_desc: Use image node_id 1 for calling a global function with example usage: compute_auc(y_true, y_pred) and returns: roc_auc_score, np