fix round error

app.py

@@ -155,7 +155,7 @@ def greet(X, ny):
             cnt+=1
         val = val - torch.log(probs[idx[cnt]])
     val = val/num_sub_tokens_label
-    val = round(val, 2)
+    vali = round(val.item(), 2)
         
 #     print(er)
 #     astr = ""
@@ -173,7 +173,7 @@ def greet(X, ny):
 #             astr+=mock
 #         else:
 #             astr+=mock.capitalize()     
-    er = er+" (with PLL value of: "+str(val.item())+")"
+    er = er+" (with PLL value of: "+str(vali)+")"
     return er
 title = "Rename a variable in a Java class"
 description = """This model is a fine-tuned GraphCodeBERT model fine-tuned to output higher-quality variable names for Java classes. Long classes are handled by the