Convert letters: Python3: input(), for loop, dictionary

letter_subs.py

#!/usr/bin/env python3
'''Convert characters to similar, random UTF-8 characters.'''
from random import randrange

def substitute():
    '''Given text string, `substitute()` method substitutes characters.'''
    char_dict = {
        'a': ['à', 'á', 'â', 'ã', 'ä', 'å', 'ā', 'ă', 'ȃ', 'ą', 'ǎ', 'ȁ', 'ȧ',
              'ɑ', 'ά'],
        'A': ['À', 'Á', 'Â', 'Ã', 'Ä', 'Å', 'Ā', 'Ă', 'Ȃ', 'Ą', 'Ǎ', 'Ȁ', 'Ȧ',
              'Ά', 'Α'],
        'b': ['ƀ', 'Ƅ', 'ɓ'],
        'B': ['Ɓ', 'ƅ', 'Ƀ', 'Β', 'β'],
        'c': ['ç', 'ć', 'ĉ', 'ċ', 'č', 'ƈ', 'ϲ', 'ͼ', 'ʗ'],
        'C': ['Ç', 'Ć', 'Ĉ', 'Ċ', 'Č', 'Ƈ', 'Ϲ', 'Ͼ'],
        'd': ['đ', 'ď', 'ȡ', 'ɗ'],
        'D': ['Ð', 'Ď', 'Ɗ'],
        'e': ['è', 'é', 'ê', 'ë', 'ē', 'ĕ', 'ė', 'ę', 'ȩ', 'ě', 'ȅ', 'ȇ', 'ɇ'],
        'E': ['È', 'É', 'Ê', 'Ë', 'Ē', 'Ĕ', 'Ė', 'Ę', 'Ȩ', 'Ě', 'Ȅ', 'Ȇ', 'Ɇ',
              'Έ', 'Ε'],
        'f': ['ƒ', 'ϝ'],
        'F': ['Ƒ', 'Ϝ'],
        'g': ['ĝ', 'ğ', 'ġ', 'ģ', 'ǥ', 'ǵ', 'ɠ', 'ɡ'],
        'G': ['Ĝ', 'Ğ', 'Ġ', 'Ģ', 'Ǥ', 'Ǵ', 'Ɠ'],
        'h': ['ĥ', 'Ȟ', 'ħ', 'ɦ', 'ɧ', 'ꜧ'],
        'H': ['Ĥ', 'ȟ', 'Ή', 'Η', 'Ꜧ'],
        'i': ['¡', 'í', 'î', 'ï', 'ĩ', 'ī', 'ĭ', 'ȋ', 'į', 'ı', 'ɩ', 'ί', 'ϊ'],
        'I': ['Ì', 'Í', 'Î', 'Ï', 'Ĩ', 'Ī', 'Ĭ', 'Ȋ', 'Į', 'İ', 'Ǐ', 'Ɨ', 'Ȉ',
              'Ί', 'Ι'],
        'j': ['ĵ', 'ȷ', 'ɉ', 'ʝ', 'ϳ'],
        'J': ['Ĵ', 'Ɉ', 'Ϳ'],
        'k': ['ķ', 'ƙ', 'ǩ', 'ꝁ', 'ꝃ', 'ꝅ'],
        'K': ['Ķ', 'Ƙ', 'Ǩ', 'Ꝁ', 'Ꝃ', 'Ꝅ', 'Κ', 'Ϗ'],
        'l': ['ĺ', 'ļ', 'ľ', 'ŀ', 'ł', 'ƚ', 'ȴ', 'ɭ'],
        'L': ['Ĺ', 'Ļ', 'Ľ', 'Ŀ', 'Ł', 'Ƚ', 'Ꝉ'],
        'm': ['m', 'ɱ', 'ϻ'],
        'M': ['Μ', 'Ϻ'],
        'n': ['ñ', 'ń', 'ņ', 'ň', 'ƞ', 'ʼn', 'ȵ', 'ɲ', 'ɳ', 'ή'],
        'N': ['Ñ', 'Ń', 'Ņ', 'Ň', 'Ƞ', 'Ɲ', 'Ν'],
        'o': ['ò', 'ó', 'ô', 'õ', 'ö', 'ø', 'ǿ', 'ō', 'ŏ', 'ȏ', 'ő', 'ȍ', 'ơ',
              'ǒ', 'ȯ', 'ɵ', 'ο', 'ʘ', 'ό'],
        'O': ['Ò', 'Ó', 'Ô', 'Õ', 'Ö', 'Ø', 'Ǿ', 'Ō', 'Ŏ', 'Ȏ', 'Ő', 'Ȍ', 'Ơ',
              'Ǒ', 'Ȯ', 'Ɵ', 'Ο', 'Θ', 'θ', 'ϴ', 'Ό'],
        'p': ['ƥ', 'ƿ', 'ρ'],
        'P': ['Ƥ', 'Ƿ', 'Ρ'],
        'q': ['ǫ', 'ǭ', 'ɋ'],
        'Q': ['Ǫ', 'Ǭ', 'Ɋ'],
        'r': ['ŕ', 'ŗ', 'ř', 'ȑ', 'ȓ', 'ɼ'],
        'R': ['Ŕ', 'Ŗ', 'Ř', 'Ȑ', 'Ȓ', 'Ʀ', 'Ɍ'],
        's': ['ś', 'ŝ', 'ş', 'š', 'ș', 'ȿ'],
        'S': ['Ś', 'Ŝ', 'Ş', 'Š', 'Ș'],
        't': ['ţ', 'ŧ', 'ț', 'ƫ', 'ť', 'ȶ', 'ʈ'],
        'T': ['Ţ', 'Ŧ', 'Ț', 'Ƭ', 'Ʈ', 'Ť', 'ͳ', 'Ͳ', 'Τ'],
        'u': ['ù', 'ú', 'û', 'ü', 'ũ', 'ū', 'ŭ', 'ȗ', 'ů', 'ű', 'ȕ', 'ų', 'ư',
              'ʉ'],
        'U': ['Ù', 'Ú', 'Û', 'Ü', 'Ũ', 'Ū', 'Ŭ', 'Ȗ', 'Ů', 'Ű', 'Ȕ', 'Ų', 'Ư',
              'Ʉ'],
        'v': ['v'],
        'V': ['V'],
        'w': ['ŵ', 'ω', 'ώ'],
        'W': ['Ŵ'],
        'x': ['×'],
        'X': ['χ'],
        'y': ['ý', 'ŷ', 'ÿ', 'ƴ', 'ȳ', 'ʏ', 'γ'],
        'Y': ['Ý', 'Ŷ', 'Ÿ', 'Ƴ', 'Ȳ', 'Ύ', 'Υ', 'ϓ', 'ϔ'],
        'z': ['ź', 'ż', 'ž', 'ƶ', 'ȥ', 'ʐ', 'ʑ'],
        'Z': ['Ź', 'Ż', 'Ž', 'Ƶ', 'Ȥ'],
        '?': ['¿']}

    char_list = list(input('Enter text string: '))  # listed char input
    converted = []  # list of converted characters

    for i in char_list:
        if i not in char_dict:
            converted.append(i)  # append non-match to `converted`
        else:
            char_list_len = len(char_dict[i])  # length of key value's list
            converted.append(char_dict[i][randrange(0, char_list_len, 1)])  # append random char
    print(''.join(converted))  # join list of substitued characters


if __name__ == '__main__':
    substitute()

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curl -s https://gist.githubusercontent.com/nick3499/1015248c0d082485e5e45323be04cd11/raw/b3f7339f0635f259c0316d6aeb21e6fac75cda3b/letter_subs.py | python3

That is basically how to run the script in the command line, but, in this case, the string passed to input() would probably need to be passed to the function as sys.argv[1], but have not set that up yet. If someone needs that fuctionality, let me know.