diff --git a/src/Q_Learning/q_learning_ttk.py b/src/Q_Learning/q_learning_ttk.py
index 76bdaeb..ac07973 100644
--- a/src/Q_Learning/q_learning_ttk.py
+++ b/src/Q_Learning/q_learning_ttk.py
@@ -1,6 +1,7 @@
 """Visualize Q-learning process"""
 import numpy as np
 from numpy import matrix, zeros
+
 from ..Graph import CWindow