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# Inheritance

# inheritance means creating a new class who access variables and methods from parent class

# A class can inherit attributes and behaviour methods from another class, called the superclass. A class which inherits from a superclass is called a subclass, also called heir class or child class

# simple Example

# laptop -has atrributes brand,screen,hdd,ram,

# gaming laptop-has attributes brand,screen ,hdd,ram,graphicscard,processing clock speed

# You can derive initailization from parent class in two way

# 1. super().__init__(Variable from parent claas)

# 2.Classname.__init__(self,Variable from parent claas)

# Now First Create a Class for normal Laptop

# this is base class/parent class

class Laptop():

def __init__(self, brand, screen, hdd, ram):

self.screen = screen

self.ram = ram

self.brand = brand

self.hdd = hdd

def showinfo(self):

print('The laptop brand is {} whose screen size is {}. And who has {} TB hdd and {} gb ram'.format(self.brand,

self.screen,

self.hdd,

self.ram))

def data(self):

print('data is for normal laptop')

# Now Create Another class for GamingLaptop

# but gaming laptop has some attributes which are already present in laptop class

# so create new class with name GamingLaptop which inherits laptop class inside it

# this is derived class

class GamingLaptop(Laptop): # add parent class name inside bracket

def __init__(self, brand, screen, hdd, ram, graphics, cpuspeed):

super().__init__(brand, screen, hdd,

ram) # call parent class method __init__() to define brand,screen,hdd,ram from base class or parent class Laptop

# now define remaining attributes here

self.graphics = graphics

self.cpuspeed = cpuspeed

def data(self):

print('data is for Gaming laptop')

# Now create a object of derived class and call method from parent class

lenovogaming = GamingLaptop('Lenovo', 15.6, 1, 8, 4, '3.0ghz')

lenovogaming.showinfo()

# method overriding

# derived class has a same name method as compare to parent class then only derived class methood is called

# both class has same method data()

lenovogaming.data() # this will call method of GamingLaptop Class