Python – Replace occurrences by K except first character
Given a String, the task is to write a Python program to replace occurrences by K of character at 1st index, except at 1st index.
Examples:
Input : test_str = 'geeksforgeeksforgeeks', K = '@' Output : geeksfor@eeksfor@eeks Explanation : All occurrences of g are converted to @ except 0th index. Input : test_str = 'geeksforgeeks', K = '#' Output : geeksfor#eeks Explanation : All occurrences of g are converted to # except 0th index.
Method #1 : Using slicing + replace()
In this, we perform task of replacing entire string from 2nd character with K of the character occurring at 1st index. The result is prefix joined by first character.
Python3
# Python3 code to demonstrate working of # Replace occurrences by K except first character # Using slicing + replace() # initializing string test_str = 'geeksforgeeksforgeeks' # printing original string print("The original string is : " + str(test_str)) # initializing K K = '$' # replacing using replace() res = test_str[0] + test_str[1:].replace(test_str[0], K) # printing result print("Replaced String : " + str(res)) |
chevron_right
filter_none
Output:
The original string is : geeksforgeeksforgeeks Replaced String : geeksfor$eeksfor$eeks
Method #2 : Using replace()
In this, replace() is called twice for task of replacing all occurences, and then just reverse replace the first occurrence.
Python3
# Python3 code to demonstrate working of # Replace occurrences by K except first character # Using replace() # initializing string test_str = 'geeksforgeeksforgeeks' # printing original string print("The original string is : " + str(test_str)) # initializing K K = '$' # replacing using replace() res = test_str.replace(test_str[0], K).replace(K, test_str[0], 1) # printing result print("Replaced String : " + str(res)) |
chevron_right
filter_none
Output:
The original string is : geeksforgeeksforgeeks Replaced String : geeksfor$eeksfor$eeks
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.
