Update app.py

app.py

@@ -90,11 +90,12 @@ def upload():
         frame_images = []
 
     return redirect(url_for(
-        'index',
-        video_filename=filename,
-        result_image=result_image,
-        frame_images="|".join(frame_images)
-    ))
+       'index',
+       video_filename=filename,
+       result_image=result_image,
+       frame_images="|".join(frame_images)
+    ))  # <-- this is the required closing parenthesis
+
 
 
 @app.route('/uploads/<path:filename>')