Question

How to replace the last occurrence of a substring in a string with Python

Answer 1

import re

def replace_last_occurrence(s, old, new):
    old_idx = s.rfind(old)
    
    if old_idx == -1:  
        return s
        
    return s[:old_idx] + new + s[old_idx + len(old):]


s = "Python programming high-level programming general-purpose programming language"
old = "programming"
new = "ABC"

result = replace_last_occurrence(s, old, new)

print(result) 


 
'''
run:
 
Python programming high-level programming general-purpose ABC language

'''

 

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