diff --git a/network/glue.py b/network/glue.py
index 47fd915..855be48 100644
--- a/network/glue.py
+++ b/network/glue.py
@@ -1,6 +1,6 @@
 # Glue layer for transforming whole pictures into 384x384 sequence for encoder input
 from dataclasses import dataclass
-from itertools import product
+from itertools import product # product library
 
 import torch
 import torch.nn as nn