Update app.py

app.py

@@ -36,7 +36,9 @@ def SaveResult(text, outputfileName):
 def store_message(name: str, message: str, outputfileName: str):
     basedir = os.path.dirname(__file__)
     savePath = outputfileName
-
+    
+    # if file doesnt exist, create it with labels
+    from os.path import exists
     file_exists = exists(savePath)
     if (file_exists==False):
         with open(outputfileName, "w") as f: #write