diff --git a/codes/utils.py b/codes/utils.py
index ea4e7308859c31973c77ea62b16e3a402b1fdc85..c2b1f4265775b28f64f5f25bfcd83bbfbe8b95e1 100644
--- a/codes/utils.py
+++ b/codes/utils.py
@@ -1,7 +1,7 @@
 import numpy as np
 import kwant
-from itertools import product
 from scipy.sparse import coo_array
+from itertools import product
 import inspect
 from copy import copy