Python Tutorial

Introduction Python Features Python Applications System requirements for Python Python Installation Python Basics Python Variables Python Data Types Python IDE Python Keywords Python Operators Python Comments Python Pass Statement

Python Conditional Statements

Python if Statement Python elif Statement Python If-else statement Python Switch Case

Python Loops

Python for loop Python while loop Python Break Statement Python Continue Statement Python Goto Statement

Python Arrays

Python Array Python Matrix

Python Strings

Python Strings Python Regex

Python Built-in Data Structure

Python Lists Python Tuples Python Lists vs Tuples Python Dictionary Python Sets

Python Functions

Python Function Python min() function Python max() function Python User-define Functions Python Built-in Functions Anonymous/Lambda Function in Python

Python File Handling

Python File Handling Python Read CSV Python Write CSV Python Read Excel Python Write Excel Python Read Text File Python Write Text File Read JSON File in Python

Python Exception Handling

Python Exception Handling Python Errors and exceptions Python Assert

Python OOPs Concept

OOPs Concepts in Python Classes & Objects in Python Inheritance in Python Polymorphism in Python Python Encapsulation Python Constructor Static Variables in Python Abstraction in Python

Python Iterators

Iterators in Python Yield Statement In Python

Python Generators

Python Generator

Python Decorators

Python Decorator

Python Functions and Methods

Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods

Python Modules

Python Modules Python Datetime Module Python Calendar Module  

Python MySQL

Python MySQL Python MySQL Update Operation Python MySQL Delete Operation

Python MongoDB

Python MongoDB

Python Data Structure Implementation

Python Stack Python Queue Python Hash Table Python Graph

Python Advance Topics

Speech Recognition in Python Face Recognition in Python Python Rest API Python Command Line Arguments Python JSON Python Virtual Environment Type Casting in Python Collections in python Python Enumerate Python Debugger Python DefaultDict


Python PPTX Python Pickle Python Seaborn Python Coroutine Python EOL Python Infinity Python math.cos and math.acos function Python Project Ideas Based On Django Reverse a String in Python Reverse a Number in Python Python Word Tokenizer Python Trigonometric Functions Python try catch exception GUI Calculator in Python Implementing geometric shapes into the game in python Installing Packages in Python Python Try Except Python Sending Email Socket Programming in Python Python CGI Programming Python Data Structures Python abstract class Python Compiler Python K-Means Clustering List Comprehension in Python3 NSE Tools In Python Operator Module In Python Palindrome In Python Permutations in Python Pillow Python introduction and setup Python Functionalities of Pillow Module Python Argmin Python whois Python JSON Schema Python lock Return Statement In Python Reverse a sentence In Python tell() function in Python Why learn Python? Write Dictionary to CSV in Python Write a String in Python Binary Search Visualization using Pygame in Python Latest Project Ideas using Python 2022 Closest Pair of Points in Python ComboBox in Python Python vs R Python Ternary Operators Self in Python Python vs Java Python Modulo Python Packages Python Syntax Python Uses Python Logical Operators Python Multiprocessing Python History Difference between Input() and raw_input() functions in Python Conditional Statements in python Confusion Matrix Visualization Python Python Algorithms Python Modules List Difference between Python 2 and Python 3 Is Python Case Sensitive Method Overloading in Python Python Arithmetic Operators Design patterns in python Assignment Operators in Python Is Python Object Oriented Programming language Division in Python Python exit commands Continue And Pass Statements In Python Colors In Python Convert String Into Int In Python Convert String To Binary In Python Convert Uppercase To Lowercase In Python Convert XML To JSON In Python Converting Set To List In Python Covariance In Python CSV Module In Python Decision Tree In Python Difference Between Yield And Return In Python Dynamic Typing In Python Abstract design pattern in python Builder design pattern in python Prototype design pattern in Python Creational design patterns in Python

How to

How to convert integer to float in Python How to reverse a string in Python How to take input in Python How to install Python in Windows How to install Python in Ubuntu How to install PIP in Python How to call a function in Python How to download Python How to comment multiple lines in Python How to create a file in Python How to create a list in Python How to declare array in Python How to clear screen in Python How to convert string to list in Python How to take multiple inputs in Python How to write a program in Python How to compare two strings in Python How to create a dictionary in Python How to create an array in Python How to update Python How to compare two lists in Python How to concatenate two strings in Python How to print pattern in Python How to check data type in python How to slice a list in python How to implement classifiers in Python How To Print Colored Text in Python How to develop a game in python How to print in same line in python How to create a class in python How to find square root in python How to import numy in python How to import pandas in python How to uninstall python How to upgrade PIP in python How to append a string in python How to open a file in python


Python Sort List Sort Dictionary in Python Python sort() function Python Bubble Sort


Factorial Program in Python Prime Number Program in Python Fibonacci Series Program in Python Leap Year Program in Python Palindrome Program in Python Check Palindrome In Python Calculator Program in Python Armstrong Number Program in Python Python Program to add two numbers Anagram Program in Python Even Odd Program in Python GCD Program in Python Python Exit Program Python Program to check Leap Year Operator Overloading in Python Pointers in Python Python Not Equal Operator Raise Exception in Python Salary of Python Developers in India What is a Script in Python Singleton design pattern in python

Method Overloading in Python

Overloading is a capability of a method and operator to behave differently according to the nature of parameters.

Overloading is popular because it provides a good number of advantages:

  • Reusability of code.
  • Reduces the time required in writing the same code repeatedly.
  • Debugging becomes easier.
  • Decreases complication and raises clarity of code.

Python supports two types of overloading: -

  1. Operator overloading
  2. Function or Method Overloading

Operator Overloading

Use of arithmetic operators to provide special meaning to the operators. E.g.- ‘+’ can be used to add string and float besides int.

Other arithmetic operators like -, *, /, % can also be overloaded.

Method Overloading

Whenmore than one methodor functionhas an identicalname, but a dissimilar parameter list which results in varying method signatures, is termed method overloading.

Two or more no. of methods which are also called functions, can participate in method overloading based on the succeeding three criteria:

  1. Quantity of arguments
  2. Forms of arguments
  3. Order of arguments.

The basic syntax of a function:

Method1(int a) {
Method2(int a, int b){

Method Overloading is provided by most object-oriented programming languages such as C++, Java.

Python does not support method overloading by default, but it can be achieved in two ways which we will see in the upcoming part. 

Method Overloading in Python

The issue with method overloading in Python

Multiple methods can also be overloaded here but only the newest defined method can be used making, other methods vague.

Here’s an example to understand the issue better.

#  sum method 1 accepts two arguments and gives out their sum
def sum (a1, a2 ):
	sm = a1 + a2

# sum method 2 accepts two arguments and gives out their sum

def sum (a1, a2, a3, a4):
	sm = a1 + a2 + a3 + a4
# sum method 3 accepts three arguments and gives out their sum
def sum (a1, a2, a3):
	sm = a1 + a2 + a3

#  line below shows an error if it is not commented	
# sum (7, 8)
# sum (44, 21, 6, 9)

# This line will call the third sum method
sum (8, 7, 9)


Method Overloading in Python

Explanation: Here, we can see the starting two-sum method has not been used. Only the newest one is in action. So, this would not fulfill our purpose.

We have got two ways to resolve this issue. Here we begin to see both of them one by one.


# Function to input multiple arguments
def sum(data_type, *args):

	# if datatype is int
	# initialize answer as 0
	if data_type =='int':
		result = 0
	# if datatype is str
	# initialize answer as ''
	if data_type =='str':
		result =''

	# Traversing through the arguments
	for i in args:

		# This will perform addition if the
		# arguments are int. Or concatenation
		# if the arguments are str
		result = result + i


# Integer data
sum('int', 45, 86)
sum('int', 78, 87)

# String data
sum('str', 'Hello ', 'developers')
sum('str', 'Hello ' , 'aspirants')


Method Overloading in Python

Explanation: This method solves the issue, but the usage of if…else statements increase the no. of lines of code which makes the code complex. Thus, it is not an effective way of method overloading.


Using the Multiple Dispatch Decorator tool, which is of great utility in python.


The multiple dispatch Decorator tool has to be installed.

pip3 install multiple dispatch

Let’s understand through an example-

from multipledispatch import dispatch

#passing one parameter
@dispatch(int, int)
def addition(first, second):
	sum = first + second

#passing two parameters
@dispatch(int, int, int)
def addition(first, second, third):
	sum = first + second + third

#passing values of float datatypes
@dispatch(float, float, float)
def addition(first, second, third):
	sum = first + second + third

#passing values of float and int datatypes
@dispatch(float, int, int, float)
def addition(first, second, third):
	sum = first + second + third

#calling addition method with 3 arguments of int datatype
 #this will give an output of 24

#calling addition method with 3 arguments of float datatype
 # this will give output of 10.0

#calling addition method with 4 arguments of float and int datatype
addition(5.0, 3, 6, 5.0)
# this will give an output of 19.0

Although, Python doesn’t provide a default method of overloading, it can be altered to use method overloading by using the Multiple dispatch decorator tool.