Types Of Inheritance In Python

Introduction

 

In this article, I will explain the types of inheritance in Python.

 

Definition

 

In Python, we used to create new classes from existing classes. A class that can inherit the attributes and behavior from another class is called inheritance. The class from which another class has been derived is called the base class. The class which inherits the behavior of the class is called the derived class.

 

Advantages of inheritance

1. Reusability of code
2. Code sharing
3. Consistency of interface

Single inheritance

 

When a derived class inherits only from syntax, the base class is called single inheritance. If it has one base class and one derived class it is called single inheritance.

 

Diagram

 

 

Syntax

class A: #parent class
    #some code

class b(A): #child class
    #some code

Example

class father:#parent class
  def father_name(self):
     print("my father name is selvaraj")

class son(father):#child class
  pass

obj_father= father()#object for father class.
obj_son=son()#object for son class.

obj_son.father_name()# you access son class to father class.

Output

 

 

Multilevel inheritance

 

Multiple inheritance is the concept where a subclass inherits properties from multiple base classes. It has one base class and two (or) more derived classes called multilevel inheritance.

 

Diagram

 

 

Syntax

class A: #parent class
    #some code

class B(A): #child class
    #some code

class C(B): #child class
    #some code

Example

class g_father:#parent class
  def g_father_name(self):
     print("my father name is ramasamy")

class father(g_father):#child class
  def father_name(self):
     print("my father name is selvaraj")

class son(father):#child class
  def son_name(self):
     print("my name is surya")


obj_g_father= father()#object for g_father class.
obj_father= father()#object for father class.
obj_son=son()#object for son class.

obj_son.g_father_name()# you access son class to g_father class.
obj_son.father_name()# you access son class to father class.
obj_son.son_name()# you access same class.

Output

 

 

Multiple inheritance

 

Multiple inheritance is the concept where a subclass inherits properties from multiple base classes. If it has two base classes and one derived class it is called multilevel inheritance.

 

Diagram

 

Syntax

class A: #parent class
    #some code

class B(A): #parent class
    #some code

class C (A, B): #child class
    #some code

Example

class father:#parent class
  def father_name(self):
     print("my father name is selvaraj")

class mother:#parent class
  def mother_name(self):
     print("my father name is jayanthi")

class son(mother,father):#child class
  pass

obj_father= father()#object for father class.
obj_mother=mother()#object for mother class.
obj_son=son()#object for son class.

obj_son.father_name()# you access son class to father class.
obj_son.mother_name()# you access son class to mother class.


#obj_mother.father_name()\\This statement did not work because mother and father are parents.

Output

 

 

Conclusion

 

In this article, we have seen types of inheritance in Python. I hope this article was useful to you. Thanks for reading!