Update app.py

app.py

@@ -86,9 +86,9 @@ def display_data_survey():
     <iframe src="{survey_url}" width="100%" height="600px"></iframe>
     <script>
         // Listen for messages from the iframe
-        window.addEventListener("message", (event) => {
+        window.addEventListener("message", (event) => {{
             console.log("Received message from iframe:", event.data);
-        });
+        }});
     </script>
     """
     return iframe_html