Question

How to replace consecutive characters with only one using RegEx in Python

Answer 1

import re

def remove_consecutive_duplicates(input_string):
    # Matches any character (.) followed by itself one or more times (\1+)
    pattern = r"(.)\1+"

    # Replaces with the first captured group
    result = re.sub(pattern, r"\1", input_string)
    
    return result

input_string = "aaaabbbccdddddd"
modified_string = remove_consecutive_duplicates(input_string)

print("Original:", input_string)
print("Modified:", modified_string)



'''
run:

Original: aaaabbbccdddddd
Modified: abcd

'''

 

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