Calculate the difference between sum of all consonant chars and sum of all vowel chars

calc_epigram.py

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VOWELS = ['a', 'e', 'i', 'o', 'u', "A", "E", "I", "O", "U"]


def calc_epigram(sentence: str) -> int:
    return sum(ord(char) if char not in VOWELS else -ord(char) for char in filter(lambda x: x.isalpha(), sentence))


assert (calc_epigram("why and how")) == 569