Skip to content
Related Articles

Related Articles

Improve Article
Python – Remove K length Duplicates from String
  • Last Updated : 02 Sep, 2020

Given a String remove all K length duplicates.

Input : test_str = ‘geeksforfreeksfo’, K = 3
Output : geeksforfree
Explanation : eek, eks, ksf, sfo already in string, hence removed.

Input : test_str = ‘geeksforg’, K = 3
Output : geeksforg
Explanation : No repeated string, nothing removed.

Method : Using loop + slicing

In this, we keep track of all the K length substrs encountered, extracted using slicing, and check each time for recurrence, if occurred they are removed.


# Python3 code to demonstrate working of 
# Remove K length Duplicates from String
# Using loop + slicing 
# initializing strings
test_str = 'geeksforfreeksfo'
# printing original string
print("The original string is : " + str(test_str))
# initializing K 
K = 3
memo = set()
res = []
for idx in range(0, len(test_str) - K):
    # slicing K length substrings
    sub = test_str[idx : idx + K]
    # checking for presence
    if sub not in memo:
res = ''.join(res[ele] for ele in range(0, len(res), K))
# printing result 
print("The modified string : " + str(res)) 
The original string is : geeksforfreeksfo
The modified string : geeksforfree

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up
Recommended Articles
Page :