How to Find all Duplicate Characters in String using Python

In this tutorial, we will program 'How to Find All Duplicate Characters in a String Using Python'. We will learn how to detect duplicate characters in a string. The objective is to enable you to track all duplicates within a string. I will provide a sample program to demonstrate the actual coding of this tutorial.

This topic is very easy to understand; just follow the instructions I provide, and you can also do it yourself with ease. The program I will show you covers the basics of programming for finding duplicate character in a string. I will do my best to provide you with the easiest way for getting all the duplicates from string. So, let's start with the coding.

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

def findDupe(string):
 
	chars = {}
 
 
	for char in string:
 
		if char not in chars:
			chars[char] = 1
		else:
			chars[char] += 1
 
 
	duplicates = []
 
	for char, count in chars.items():
		if count > 1:
			duplicates.append(char)
 
	return duplicates
 
 
ret = False
 
 
while True:
        print("\n================== Find all Duplicate Characters in String  ==================\n\n")
 
        mystr=input("Enter a string: ")
 
        print(findDupe(mystr))
 
 
        opt = input("\nDo you want to try again?(yes/no): ")
 
        if opt.lower() == 'yes':
                ret=False
        elif opt.lower() == 'no':
                ret=True
                print("Exiting program....")
 
        else:
                print("Please enter yes/no:")
                break
 
        if ret == False:
                continue

This Python script identifies and returns all duplicate characters in a given string. The script uses a dictionary to count the occurrences of each character, then constructs a list of characters that appear more than once. The user is prompted to enter a string, and the script prints the duplicate characters found in that string. The user can choose to try again or exit the program.

Output:

The How to Find all Duplicate Characters in String using Python source code that I provide can be download below. Please kindly click the download button.

There you have it we successfully created How to Find all Duplicate Characters in String using Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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