Update app.py

app.py

@@ -40,7 +40,7 @@ def qsartoolbox_qsar_model_tool(smiles:str, qsarModelGUID: str)-> Optional[str]:
 
     if(result != None):
         return result['Value']
-    else
+    else:
         return None
 
 final_answer = FinalAnswerTool()