diff --git a/helperfns.py b/helperfns.py
index 274bc45..3945082 100644
--- a/helperfns.py
+++ b/helperfns.py
@@ -1,9 +1,10 @@
 import datetime
-import numpy as np
 import pickle
-import tensorflow as tf
 import time
 
+import numpy as np
+import tensorflow as tf
+
 
 def stack_data(data, num_shifts, len_time):
     """Stack data from a 2D array into a 3D array.