Remove ; as python doesn't seem to handle it

app.py

@@ -9,10 +9,10 @@ state = State()
 
 js = """
 window.onMessage = (event) => {
-  const message = event.data;
-  const output = update_values(state.context, message);
-  document.getElementById("output").value = output;
-};
+  const message = event.data
+  const output = update_values(state.context, message)
+  document.getElementById("output").value = output
+}
 """
 
 def update_values(context, question):