diff --git a/router.py b/router.py
index 30af2f3..7f00983 100644
--- a/router.py
+++ b/router.py
@@ -3,7 +3,7 @@
 
 import sys, time
 from array import array
-from itertools import islice, zip, groupby
+from itertools import islice, groupby
 from random import shuffle
 from mymath import *
 from layer import *
diff --git a/view_mpl.py b/view_mpl.py
index 35a4deb..721ba3d 100755
--- a/view_mpl.py
+++ b/view_mpl.py
@@ -4,7 +4,7 @@
 
 import os, sys, argparse, select
 from ast import literal_eval
-from itertools import zip, islice, chain
+from itertools import islice, chain
 from mymath import *
 
 import matplotlib.pyplot as plt