updated args

docs/source/examples/example_model.py

@@ -77,7 +77,7 @@ class ExampleModel(RootModule):
         output = OrderedDict({
             'loss_val': loss_val,
         })
-        return output
+        return torch.tensor(4)
 
     def validation_step(self, data_batch, batch_i):
         """
@@ -100,7 +100,7 @@ class ExampleModel(RootModule):
             'loss_val': loss_val,
             'val_acc': val_acc,
         })
-        return output
+        return torch.tensor(4)
 
 
     def validation_end(self, outputs):