Update app.py

app.py

@@ -511,7 +511,7 @@ if uploaded_file is not None:
     clicked_points = []
 
     def onclick(event):
-        nonlocal touch_x, touch_y  # Ensure we update the outer variables
+        global touch_x, touch_y  # Use global to update the outer variables
         if event.xdata and event.ydata:
             touch_x, touch_y = int(event.xdata), int(event.ydata)
             clicked_points.append((touch_x, touch_y))