Update app.py

app.py

@@ -19,6 +19,7 @@ set_window_url_params = """
             params.set("text_input", text_input)
             url_params = Object.fromEntries(params);
     	    const queryString = '?' + params.toString();
+            // this next line is only needed inside Spaces, so the child frame updates parent
             window.parent.postMessage({ queryString: queryString }, "*")
             return [text_input, url_params];
         }