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

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.
  1. def findDupe(string):
  3. chars = {}
  6. for char in string:
  8. if char not in chars:
  9. chars[char] = 1
  10. else:
  11. chars[char] += 1
  14. duplicates = []
  16. for char, count in chars.items():
  17. if count > 1:
  18. duplicates.append(char)
  20. return duplicates
  23. ret = False
  26. while True:
  27. print("\n================== Find all Duplicate Characters in String ==================\n\n")
  29. mystr=input("Enter a string: ")
  31. print(findDupe(mystr))
  34. opt = input("\nDo you want to try again?(yes/no): ")
  36. if opt.lower() == 'yes':
  37. ret=False
  38. elif opt.lower() == 'no':
  39. ret=True
  40. print("Exiting program....")
  42. else:
  43. print("Please enter yes/no:")
  44. break
  46. if ret == False:
  47. 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.


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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Submitted byTechy (not verified)on Sat, 06/01/2024 - 08:59

thanks bruv

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