Untitled

import random
import string

c = " " + string.punctuation + string.digits + string.ascii_letters
char = list(c)
key = char.copy()

random.shuffle(key)
(f"Chars = {char}")
(f"Key   = {key}")

plain = input("enter a message to encrypt")
cipher = ""
for i in plain:
    index = char.index(i)
    cipher += key[index]

print(f"Original message is {plain}")
print(f"Encrypted is {cipher}")

cipher = input("enter a message to decrypt")
plain = ""
for i in cipher:
    index = key.index(i)
    plain += char[index]

print(f"Original message is {plain}")