diff --git a/solutions/object_oriented_design/parking_lot/parking_lot.py b/solutions/object_oriented_design/parking_lot/parking_lot.py
index 08852d9d..d6119e94 100644
--- a/solutions/object_oriented_design/parking_lot/parking_lot.py
+++ b/solutions/object_oriented_design/parking_lot/parking_lot.py
@@ -14,7 +14,7 @@ class Vehicle(metaclass=ABCMeta):
     def __init__(self, vehicle_size, license_plate, spot_size):
         self.vehicle_size = vehicle_size
         self.license_plate = license_plate
-        self.spot_size
+        self.spot_size=spot_size
         self.spots_taken = []
 
     def clear_spots(self):
@@ -33,7 +33,7 @@ class Vehicle(metaclass=ABCMeta):
 class Motorcycle(Vehicle):
 
     def __init__(self, license_plate):
-        super(Motorcycle, self).__init__(VehicleSize.MOTORCYCLE, license_plate, spot_size=1)
+        super().__init__(VehicleSize.MOTORCYCLE, license_plate, spot_size=1)
 
     def can_fit_in_spot(self, spot):
         return True
@@ -42,7 +42,7 @@ class Motorcycle(Vehicle):
 class Car(Vehicle):
 
     def __init__(self, license_plate):
-        super(Car, self).__init__(VehicleSize.COMPACT, license_plate, spot_size=1)
+        super().__init__(VehicleSize.COMPACT, license_plate, spot_size=1)
 
     def can_fit_in_spot(self, spot):
         return spot.size in (VehicleSize.LARGE, VehicleSize.COMPACT)
@@ -51,7 +51,7 @@ class Car(Vehicle):
 class Bus(Vehicle):
 
     def __init__(self, license_plate):
-        super(Bus, self).__init__(VehicleSize.LARGE, license_plate, spot_size=5)
+        super().__init__(VehicleSize.LARGE, license_plate, spot_size=5)
 
     def can_fit_in_spot(self, spot):
         return spot.size == VehicleSize.LARGE