INHERITANCE-PYTHON

• INHERITANCE:

The process of acquiring properties and behaviours from one class to another class.

• PARENT CLASS:

Class which provides properties and behaviours is called “parent class (or) super class (or)  base class”.

• CHILD CLASS :

Class who receives properties and behaviours from another class is called child class (or) sub class (or) derived class”.

Ex-1:

class Parent():

    def m1(self):

        print(“hello”)

class Child(Parent):

    def m2(self):

        print(“hai”)

p= Parent()

p.m1

c=child()

c.m1

c.m2

• We can access both parent class members and child class members by creating object to the child class.
• If we create a object for child class then we can access only parent class members.

Ex-1       :

class Parent():

    def m1(self):

        print(“hello”)

class Child(Parent):

     def m2 (self) :

         super().m1()
c=child()

c.m2()

Ex-2:

class Parent():

  a,b=10,20

class Child(Parent):

 x,y=100,200

     def m2(self,I,j)

            print(i+j)

            print(self.x+self.y)

            print(self.a+self.b)


c=child()

c.m2(1,2)

TYPES OF INHERITANCE:

There are different types of inheritance and they are classified as follow:

1) Single Inheritance

2) Multiple Inheritance

3) Multi level Inheritance

4) Hierarchical Inheritance

5) Hybrid Inheritance

Now these are explained as follows:

• Single Inheritance:

One parent contains one child.

Ex-1:    class Myclass():

pass

class Myclass1(Myclass):

pass

• Multiple Inheritance:

One child contains more than one parent.

Ex-1:    class Parent():

pass

class Parent1():

pass

class Child(Parent,Parent1):

pass

• Multi level Inheritance:

One parent contains one child.That child is parent is another child.

Ex-1:    class A():

pass

class B(A):

pass

class C(B):

pass

• Hierarchical Inheritance:

Simply explained with example:

Ex-1:    class A():

pass

class B(A):

pass

class C(A):

pass

• Hybrid Inheritance:

It means by adding or combining all inheritance such as hierarchical and multiple inheritance is called hybrid inheritance.

PROGRAMS ON INHERITANCE:

• class A():

          pass

    class B(A):

         a=10

         b=20

         def m1(self,a,b):

         print(a+b)

         print(self.a+self.b)

    b=B()

    b.m1(100,200)

• class A():

                 a=10

                 b=20

    class B(A):

            a=1000

            b=2000

            def m1(elf,a,b):

                  print(super().a+super().b)

                  print(a+b)

                  print(self.a+self.b)

     b=B()

     b.m1(100,200)

If parent class instance variable name and child class instance variable name is same.Then we can access the parent class by using super().