Python - calling super class methods from derived classes

# An inheritance, abstract classes, and
# calling super class methods from derived

# classes example

class AbstractBot(object):
    def __init__(self):
        self.size = 0
        self.speed = 1
        self.pos = [0,0]
    def applyPos(self, xy):
        self.pos[0] += xy[0] * self.speed
        self.pos[1] += xy[1] * self.speed
    def getCurrentPos(self):
        return self.pos


class WalkingBot(AbstractBot):
    def applyPos(self, xy):
        super(WalkingBot, self).applyPos(xy)
        print "step, step"

class DrivingBot(AbstractBot):
    def applyPos(self, xy):
        super(DrivingBot, self).applyPos(xy)
        print "vroom, vroom"

class RunningBot(AbstractBot):
    def __init__(self):
        super(RunningBot, self).__init__()
        self.speed = 5
    def applyPos(self, xy):
        super(RunningBot, self).applyPos(xy)
        print "trot, trot"

bot1 = WalkingBot()
bot2 = DrivingBot()
bot3 = RunningBot()
bots = [bot1, bot2, bot3]

distance = (1,1)

for step in xrange(3):
    for bot in bots:
        bot.applyPos(distance)
        print 'position: ' + str(bot.getCurrentPos())