diff --git a/PathTracking/lqr_speed_steer_control/lqr_speed_steer_control.py b/PathTracking/lqr_speed_steer_control/lqr_speed_steer_control.py
index d85fa98a..5831d02d 100644
--- a/PathTracking/lqr_speed_steer_control/lqr_speed_steer_control.py
+++ b/PathTracking/lqr_speed_steer_control/lqr_speed_steer_control.py
@@ -11,9 +11,9 @@ import matplotlib.pyplot as plt
 import numpy as np
 import scipy.linalg as la
 import pathlib
-from utils.angle import angle_mod
-sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
 
+sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
+from utils.angle import angle_mod
 from PathPlanning.CubicSpline import cubic_spline_planner
 
 # === Parameters =====
diff --git a/PathTracking/lqr_steer_control/lqr_steer_control.py b/PathTracking/lqr_steer_control/lqr_steer_control.py
index 461d6e37..3c066917 100644
--- a/PathTracking/lqr_steer_control/lqr_steer_control.py
+++ b/PathTracking/lqr_steer_control/lqr_steer_control.py
@@ -11,9 +11,9 @@ import math
 import numpy as np
 import sys
 import pathlib
-from utils.angle import angle_mod
-sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
 
+sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
+from utils.angle import angle_mod
 from PathPlanning.CubicSpline import cubic_spline_planner
 
 Kp = 1.0  # speed proportional gain
diff --git a/PathTracking/rear_wheel_feedback/rear_wheel_feedback.py b/PathTracking/rear_wheel_feedback/rear_wheel_feedback.py
index 1702bd47..fd04fb6d 100644
--- a/PathTracking/rear_wheel_feedback/rear_wheel_feedback.py
+++ b/PathTracking/rear_wheel_feedback/rear_wheel_feedback.py
@@ -8,11 +8,14 @@ author: Atsushi Sakai(@Atsushi_twi)
 import matplotlib.pyplot as plt
 import math
 import numpy as np
-from utils.angle import angle_mod
-
+import sys
+import pathlib
 from scipy import interpolate
 from scipy import optimize
 
+sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
+from utils.angle import angle_mod
+
 Kp = 1.0  # speed proportional gain
 # steering control parameter
 KTH = 1.0
diff --git a/PathTracking/stanley_controller/stanley_controller.py b/PathTracking/stanley_controller/stanley_controller.py
index 08aa0493..bc98175f 100644
--- a/PathTracking/stanley_controller/stanley_controller.py
+++ b/PathTracking/stanley_controller/stanley_controller.py
@@ -13,9 +13,9 @@ import numpy as np
 import matplotlib.pyplot as plt
 import sys
 import pathlib
-from utils.angle import angle_mod
-sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
 
+sys.path.append(str(pathlib.Path(__file__).parent.parent.parent))
+from utils.angle import angle_mod
 from PathPlanning.CubicSpline import cubic_spline_planner
 
 k = 0.5  # control gain