Polymorphism

#!/usr/bin/evn python

# Define a class as 'car'
class car:
    # Constructor of the class
    def __init__(self, name, spd):
        self.name = name
        self.speed = spd
    
    # Abstract method, defined by convention only
    def spdLtm(self):             
        raise NotImplementedError("Subclass must implement abstract method")

# Define a class as 'suv' and inherit 'car'
class suv(car):
    # Redefine method with same name as super class
    def spdLtm(self):
        return 'SUV', self.speed

# Define a class as 'roadster' and inherit 'car'    
class roadster(car):
    # Redefine method with same name as super class
    def spdLtm(self):
         return 'Roadster', self.speed

# Array of objects
cars = [suv('Toyota Fortuner', '250km/h'),
             roadster('Audi R8 Spyder', '314km/h'),
             suv('Nissan V8', '280km/h')]

for car in cars:
    print ('Car name', car.name, 'Top Speed of your', car.spdLtm())



#***** Output *****
# Car name Toyota Fortuner Top Speed of your ('SUV', '250km/h')
# Car name Audi R8 Spyder Top Speed of your ('Roadster', '314km/h')
# Car name Nissan V8 Top Speed of your ('SUV', '280km/h')