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")
