embiggen.py

import sys
import string

replacements = {
        '!': ':exclamation:',
        '?': ':question:',
        '0': ':zero:',
        '1': ':one:',
        '2': ':two:',
        '3': ':three:',
        '4': ':four:',
        '5': ':five:',
        '6': ':six:',
        '7': ':seven:',
        '8': ':eight:',
        '9': ':nine:',
}

def embiggen_word(word):
    def inner(_word):
        for i in word.lower():
            if i in string.ascii_lowercase:
                yield ":big-%s:" % i
            else:
                yield replacements.get(i, i)
    return ''.join(inner(word))

sys.stdout.write(":sparkles:%s:end_sparkles:" % (' '.join(map(embiggen_word, sys.argv[1:]))))
sys.stdout.flush()