Question

How to find missing alphabet characters from a string in Python

Answer 1

import string

def get_missing_alphabet_chars(input_str: str) -> list[str]:
    # Normalize: lowercase + keep only letters
    letters = [ch for ch in input_str.lower() if 'a' <= ch <= 'z']

    # Unique letters present
    present = set(letters)

    # Alphabet minus present letters
    missing = [ch for ch in string.ascii_lowercase if ch not in present]

    return missing


missing = get_missing_alphabet_chars("Python Programming")
print(missing)



'''
run:

['b', 'c', 'd', 'e', 'f', 'j', 'k', 'l', 'q', 's', 'u', 'v', 'w', 'x', 'z']

'''

 

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