Duplicate Character Counter in Python

Published on 28 April 2022 (Updated: 25 September 2022)

Duplicate Character Counter in Python

Welcome to the Duplicate Character Counter in Python page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

import sys

if len(sys.argv) != 2 or not sys.argv[1]:
    print("Usage: please provide a string")
    sys.exit()

counter = dict()
dupes = False
for char in sys.argv[1]:
    counter.setdefault(char, 0)
    counter[char] += 1
    if counter[char] > 1:
        dupes = True

if dupes:
    for key, value in counter.items():
        if value > 1:
            print(f"{key}: {value}")
else:
    print("No duplicate characters")

Duplicate Character Counter in Python was written by:

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How to Implement the Solution

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How to Run the Solution

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