diff --git a/y2015/control_loops/python/arm.py b/y2015/control_loops/python/arm.py
index e17990a..52c1928 100755
--- a/y2015/control_loops/python/arm.py
+++ b/y2015/control_loops/python/arm.py
@@ -85,7 +85,7 @@
     self.A, self.B = self.ContinuousToDiscrete(
         self.A_continuous, self.B_continuous, self.dt)
 
-    controlability = controls.ctrb(self.A, self.B);
+    controlability = controls.ctrb(self.A, self.B)
     print 'Rank of augmented controlability matrix.', numpy.linalg.matrix_rank(
         controlability)
 
@@ -171,10 +171,10 @@
     self.U_min = numpy.matrix([[-12.0], [-12.0]])
 
     self.K_unaugmented = self.K
-    self.K = numpy.matrix(numpy.zeros((2, 5)));
+    self.K = numpy.matrix(numpy.zeros((2, 5)))
     self.K[0:2, 0:4] = self.K_unaugmented
-    self.K[0, 4] = 1;
-    self.K[1, 4] = 1;
+    self.K[0, 4] = 1
+    self.K[1, 4] = 1
     print 'Kal', self.KalmanGain
     self.L = self.A * self.KalmanGain
 
diff --git a/y2015/control_loops/python/claw.py b/y2015/control_loops/python/claw.py
index 4ca50e9..17ea700 100755
--- a/y2015/control_loops/python/claw.py
+++ b/y2015/control_loops/python/claw.py
@@ -64,7 +64,7 @@
     self.A, self.B = self.ContinuousToDiscrete(
         self.A_continuous, self.B_continuous, self.dt)
 
-    controlability = controls.ctrb(self.A, self.B);
+    controlability = controls.ctrb(self.A, self.B)
 
     print "Free speed is", self.free_speed * numpy.pi * 2.0 / 60.0 / self.G
 
diff --git a/y2015/control_loops/python/elevator.py b/y2015/control_loops/python/elevator.py
index fba72c8..89e16cd 100755
--- a/y2015/control_loops/python/elevator.py
+++ b/y2015/control_loops/python/elevator.py
@@ -77,7 +77,7 @@
 
     print self.A
 
-    controlability = controls.ctrb(self.A, self.B);
+    controlability = controls.ctrb(self.A, self.B)
     print "Rank of augmented controlability matrix.", numpy.linalg.matrix_rank(
         controlability)
 
diff --git a/y2015/control_loops/python/polydrivetrain.py b/y2015/control_loops/python/polydrivetrain.py
index a62c8c8..62e7154 100755
--- a/y2015/control_loops/python/polydrivetrain.py
+++ b/y2015/control_loops/python/polydrivetrain.py
@@ -110,8 +110,8 @@
     self.B_continuous = numpy.matrix(
         [[self._drivetrain.B_continuous[1, 0], self._drivetrain.B_continuous[1, 1]],
          [self._drivetrain.B_continuous[3, 0], self._drivetrain.B_continuous[3, 1]]])
-    self.C = numpy.matrix(numpy.eye(2));
-    self.D = numpy.matrix(numpy.zeros((2, 2)));
+    self.C = numpy.matrix(numpy.eye(2))
+    self.D = numpy.matrix(numpy.zeros((2, 2)))
 
     self.A, self.B = self.ContinuousToDiscrete(self.A_continuous,
                                                self.B_continuous, self.dt)