Use the 'property' to build a simply class.

py_property.py

# Basic's getter and setter.
class Car(object):
    __wheels = 4
    def get_wheels(self):
        return self.__wheels

    def set_wheels(self, value=4):
        self.__wheels = value
    
car = Car()
car.set_wheels(6)
print(car.get_wheels()) # 6

# Property decorator.
class Car_Property(object):
    __wheels = 4
    @property
    def get_wheels(self):
        return self.__wheels
    @get_wheels.setter
    def set_wheels(self, value=4):
        self.__wheels = value

car_property = Car_Property()
car_property.set_wheels = 8
print(car_property.get_wheels) # 8