Encryption / Decryption for kinds experiments

decrypt.py

#!/usr/bin/env python3
# (c) 2019 Georgios Gousios <gousiosg@gmail.com>
#
# Teaching encryption to kids

import sys
from encryption import KEY

INVERTED_KEY = {value: key for key, value in KEY.items()}

print(INVERTED_KEY)

while True:
    try:
        for line in sys.stdin:
            for c in line:
                if c in INVERTED_KEY.keys():
                    sys.stdout.write(INVERTED_KEY[c])
                else:
                    sys.stdout.write(c)
    except KeyboardInterrupt:
        print()
        exit(0)

encrypt.py

#!/usr/bin/env python3
# (c) 2019 Georgios Gousios <gousiosg@gmail.com>
#
# Teaching encryption to kids

import sys

KEY = {
    'a': '😇',
    'b': '💩',
    'c': '🐷',
    'd': '🌎',
    'e': '🌈',
    'f': '🍭',
    'g': '🏀',
    'h': '🏹',
    'i': '🥇',
    'j': '🏆',
    'k': '💎',
    'l': '🔮',
    'm': '💙',
    'n': '🔱',
    'o': '⚜',
    'p': '💠',
    'q': '🔔',
    'r': '🏳️‍🌈',
    's': '🇮🇴',
    't': '🇬🇷',
    'u': '🇵🇷',
    'v': '🇳🇱',
    'w': '🇺🇸',
    'x': '🇬🇧',
    'y': '🇿🇼',
    'z': '🇹🇷',
    'A': '🍳',
    'B': '🥦',
    'C': '🥝',
    'D': '🍡',
    'E': '🌕',
    'F': '🌻',
    'G': '🐲',
    'H': '🍄',
    'I': '🐿',
    'J': '🐾',
    'K': '🦋',
    'L': '🐧',
    'M': '🦄',
    'N': '🐴',
    'O': '🚸',
    'P': '⍾',
    'Q': '⎔',
    'R': '☏',
    'S': '✯',
    'T': '⚧',
    'U': '🇪🇸',
    'V': '🇫🇲',
    'W': '🇳🇮',
    'X': '🔴',
    'Y': '⚪️',
    'Z': '🔵',
    '0': '🤖',
    '1': '👸',
    '2': '🐬',
    '3': '🍟',
    '4': '📀',
    '5': '🌠',
    '6': '❗️',
    '7': '6️⃣',
    '8': '🔟',
    '9': '4️⃣',
}

while True:
    try:
        for line in sys.stdin:
            for c in line:
                if c in KEY.keys():
                    sys.stdout.write(KEY[c])
                else:
                    sys.stdout.write(c)
    except KeyboardInterrupt:
        print()
        exit(0)