from tkinter import Tk

from tkinter import messagebox

from tkinter import simpledialog

# imorting module Tkinter to use GUI

def ask_user():

ask = simpledialog.askstring("Task", "Do you want to encrypt or decrypt?")

return ask

# this line ask the user to choose to enc. or decr.

def user_message():

message = simpledialog.askstring("Message", "Enter the message: ")

return message

# this function asks user to type the message then it saves as a varible

root = Tk()

root.withdraw()

# the command to start Tkinter module

def even(number):

return number % 2 == 0

# this function will check if there is even number of characters

def get_even_letters(message):

return even_letters

def get_odd_letters(message):

return odd_letters

def swap_letters(message):

return new_message

while True:

ask = ask_user() # what user wants

if ask == "encrypt":

message = user_message() # get the msg. to enc.

encrypted = swap_letters(message)

messagebox.showinfo("Ciphertext of the message is: ", encrypted)

elif ask == "decrypt":

message = user_message() # get the msg. to decr.

decrypted = swap_letters(message)

messagebox.showinfo("Real text of the message is:", decrypted)

else:

break

root.mainloop() # keep Tkinter working