Update app.py

app.py

@@ -228,7 +228,7 @@ async def upload_file(file: UploadFile = File(...), padding_type: str = Form(...
 
         # Resize the image for display (512px by 512px)
         display_img = rectangled_img.copy()
-        if (padding_type=="top_bottom")
+        if (padding_type=="top_bottom"):
             display_img.thumbnail((512, *))  # Resize for display
         else 
              display_img.thumbnail((*, 512))  # Resize for display