ROTX encode/decoder

rotx.py

#ROTX-Encoder/Decoder


# Functions:

def encode(string, integer):
    rotated = []
    for x in string:
        rotated.append(ord(x) + integer)
    translated = ''
    for x in rotated:
        translated += chr(x)
    return translated

def back_to_menu():
    import time
    print('\nBack to menu.')
    for x in range(3):
        print('.')
        time.sleep(0.5)

def decode(string, integer):
    rotated = []
    for x in string:
        rotated.append(ord(x) - integer)
    translated = ''
    for x in rotated:
        translated += chr(x)
    return translated

def write_to_file(txt):
    option = input('Do you want to save to a text file? y/n\n')
    if option.lower() == 'y':
        name = input('Enter file name: \n')
        file = open(name, 'w')
        file.write(txt)
        file.close()
        back_to_menu()
    elif option.lower() == 'n':
        back_to_menu()
        return




print('\n\nWelcome to the ROTX-encoder\n')
while True:
    # Options in menu
    option = input('Do you want to encode, decode or exit the program.\n')

    #Encoding - From file or manual input?
    if option.lower() == 'encode':
        input_type = input('''Options:
a) Read from file
b) Enter text manually \n''')


        #Encoding text from data
        if input_type == 'a)' or input_type == 'a' or input_type.lower() == 'read from file':
            file = input('Enter name of text file.\n')
            string = open(file, 'r')
            integer = int(input('Enter key. \n'))
            print(encode(str(string), integer))
            string.close()
            write_to_file(encode(str(string), integer))


        #Encoding manually entered text
        elif input_type == 'b)' or input_type == 'b' or input_type.lower() == 'Enter text manually \n':
            string = input('Enter string \n')
            integer = int(input('Enter key. \n'))
            print(encode(string, integer))
            write_to_file(encode(string, integer))



    #Decode - From file or manual input?
    elif option.lower() == 'decode':
        input_type = input('''Options:
a) Read from file
b) Enter text manually \n''')


        #Decoding text from file
        if input_type == 'a)' or input_type == 'a' or input_type.lower() == 'read from file':
            file = input('Enter name of text file.\n')
            string = open(file, 'r')
            integer = int(input('Enter key. \n'))
            print(decode(str(string), integer))
            string.close()
            write_to_file(decode(str(string), integer))


        #Decoding manually entered text
        elif input_type == 'b)' or input_type == 'b' or input_type.lower() == 'Enter text manually \n':
            string = input('Enter string \n')
            integer = int(input('Enter key. \n'))
            print(decode(string, integer))
            write_to_file(decode(string, integer))



    #Exit program
    elif option.lower() == 'exit':
        break
        exit()