Question

Can anyone tell me how to bind to specific child class at run time in the following code? I want mCar instance in the following example redirect to class Truck or Compact according to command line options?

class Car(object):
    pass

class Truck(Car):
    pass

class Compact(Car):
    pass

and a instance of Car

mCar = Car()

Answer 1

You mean like this?

car_classes = {
'car'     : Car,
'truck'   : Truck,
'compact' : Compact
}

if __name__ == '__main__':
    option = sys.argv[1]
    mCar = car_classes[option]()
    print 'I am a', mCar.__class__.__name__