python Шифрцезарявфункции

Posted 2021-05-09

alphabet = 'abcdefghijklmnopqrstuvwxyz'


def decrypt(cleartext):
    cyphertext = ''
    for char in cleartext:
        if char in alphabet:
            newpos = (alphabet.find(char) - 13) % 26
            cyphertext += alphabet[newpos]
        else:
            cyphertext += char
    return cyphertext


cleartext = input('Cleartext: ')
cleartext = cleartext.lower()
print(decrypt(cleartext))