Add check for eval std

utils.py

@@ -120,8 +120,8 @@ def metrics_per_ep(pred: np.ndarray,
         spr = np.nan
         ktau = np.nan
     else:
-        spr, _ = spearmanr(true, pred)
-        ktau, _ = kendalltau(true, pred)
+        spr = spearmanr(true, pred).statistic
+        ktau = kendalltau(true, pred).statistic
 
     return mae, rae, r2, spr, ktau