Question

Please can I have a UML Class diagram for the Python program below:

def main():
    print()
    print("Welcome to Caesar Encryption and Viginere Decryption Cipher")
    print()
    print("Please select an option")
    option = "c"
    while option == "c":
        hello = input('Choose Caesar Cipher encrypt 1:\n'
                      'Choose Viginere Cipher Decrypt 2:\n')
        message = input('Enter a message: ')
        password = input('Enter a password: ')

        if hello == '1':
            viginere_cipher(message, password)
        elif hello == '2':
            viginere_cipher_decrypt(message, password)
            print()
            print("Choose an option")
            option = input('Enter c to continue or any key to exit: ')


# defines a function taking letter as input
def alphabet_index(letter):
    return ord(letter) - 97


# defines a function called Caesar_cipher that takes a letter and a key
def caesar_cipher(letter, key):
    if ord(letter) + key > ord('z'):

        # it subtracts 26 from the ASCII value of the letter and the key and then returns it to a character
        return chr(ord(letter) + key - 26)

    elif letter == ' ':  # if the letter we wrote is a space
        return " "  # return the space as is

    else: # otherwise

        # return the the ASCII value of the letter + key and turn into a character
        return chr(ord(letter) + key)


def viginere_cipher(message, password): # defines a function that takes message and a password
    ciphertext = ''  # defines a variable as empty
    counter = 0  # defines a variable as 0

    for letter in message:  # for every letter in the message

        # add ciphertext to itself,implement a caesar cipher by taking a letter and the key is. #
        # the alphabet_index which is the password by looping the counter count with the length of the password
        ciphertext += caesar_cipher(letter, alphabet_index(password[counter % len(password)]))
        counter += 1  # it adds 1 to counter each time
        print(ciphertext)  # return the ciphertext encryted


# defines a function that takes message and a password
def viginere_cipher_decrypt(message, password):
    ciphertext = ''  # defines a variable as empty
    counter = 0  # defines a variable as 0
    for letter in message:  # for every letter in message

        # add ciphertext to itself,implement a caesar cipher by taking
        # a letter and the key as the alphabet_index which is
        # the password by looping the counter count with the length of the password
        ciphertext += caesar_cipher(letter, 26 - alphabet_index(password[counter % len(password)]))
        counter += 1  # it adds 1 to counter each time
        print(ciphertext)  # return the ciphertext as is

main()

Answer 1

Ans:

'''

The above python program for a cipher system comprising only of functions can not be easily represented in the form of UML class diagram since it does not have any classes, objects, data members or member functions.

Hence a more Suitable diagram to represent the above python program would be Sequence Diagram!

'''

/*

Sequence diagrams are appropriate to represent function calls, and you can specify the parameters and returned values as well. Communication Diagrams are also an option and tend to go into more detail with regards to parameters used within function calls.

*/

/*

PLEASE DO LIKE AND UPVOTE IF THIS WAS HELPFUL!

THANK YOU SO MUCH IN ADVANCE!

*/