add valuerror

enhancer/utils/loss.py

@@ -46,7 +46,7 @@ class Avergeloss(nn.Module):
 
     def validate_loss(self,loss:str):
         if loss not in LOSS_MAP.keys():
-            raise ValueError()
+            raise ValueError(f"Invalid loss function {loss}, available loss functions are {LOSS_MAP.keys()}")
         else:
             return LOSS_MAP[loss]