Unit 5 - Lesson 6

55.1.1. Method overriding - an overview

(a) Method overloading is a feature that allows methods with multiple parameters.
(b) Method overriding is a feature where we modify a behaviour of a method in the derived class that is already present in the base class.
(c) This overriding feature happens only when we have a base class and derived class.

55.1.2. Writing a simple overriding example

class Car:
    def setbrandname(self, brandname):
        # Write your code 
        self.brandname= brandname
    def getbrandname(self):
        # Write your code here
        print(self.brandname)
    def setmodel(self, model):
        # Write your code here
        self.model = model
    def getmodel(self):
        # Write your code here
        print(self.model)
class Accord(Car):
    def setbrandname(self, brandname):
        # Write your code here
        self.brandname = brandname
    def getbrandname(self):
        # Write your code here
        print(self.brandname)
blueaccord = Accord() #instance of Accord
# set the brand and model name by taking the input from the user
blueaccord.setbrandname(input("brand: "))
blueaccord.setmodel(input("model: "))
#print the brand and model name using the get methods
blueaccord.getbrandname()
blueaccord.getmodel()

55.1.3. Understanding Inheritance, Multiple Inheritance and Method Overriding

#create an Animal class
class Animal:
    #define a method speak
    def speak(self):
        print("Animal makes a sound")

#create a Bird class that inherits Animal class
class Bird(Animal):
    #define a method speak
    def speak(self):
        print("Bird sings")

#create a Mammal class that inherits Animal class
class Mammal(Bird):
    #define a method speak
    def speak(self):
        print("Mammal roars")

#input
choice = input("Enter 'bird' to create a Bird or 'mammal' to create a Mammal: ")

#write your logic here
if choice == "bird":
    s = Bird()
    s.speak()
elif choice == "mammal":
    s = Mammal()
    s.speak()
else:
    print("Invalid choice")

Unit 5 - Lesson 6 | Codetantra Python

Unit 5 - Lesson 6