morseCodeTranslator.py

# Python program to implement Morse Code Translator

'''
VARIABLE KEY
'cipher' -> 'stores the morse translated form of the english string'
'decipher' -> 'stores the english translated form of the morse string'
'citext' -> 'stores morse code of a single character'
'i' -> 'keeps count of the spaces between morse characters'
'message' -> 'stores the string to be encoded or decoded'
'''

# Dictionary representing the morse code chart
MORSE_CODE_DICT = {'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': '--..',
                   '1': '.----', '2': '..---', '3': '...--',
                   '4': '....-', '5': '.....', '6': '-....',
                   '7': '--...', '8': '---..', '9': '----.',
                   '0': '-----', ',': '--..--', '.': '.-.-.-',
                   '?': '..--..', '/': '-..-.', '-': '-....-',
                   '(': '-.--.', ')': '-.--.-'}

# Function to encrypt the string according to the morse code chart


def encrypt(message):
    cipher = ''
    for letter in message:
        if letter != ' ':
            # looks up the dictionary and adds the correspponding morse code
            # along with space to separate morse codes for different characters
            cipher += MORSE_CODE_DICT[letter] + ' '
        else:
            # 1 space indicates different characters
            # & 2 indicates different words
            cipher += ' '

    return cipher

# Function to decipherrypt the string from morse to english


def decrypt(message):
    message += ' '  # extra space added at the end to access the last morse code
    decipher = ''
    citext = ''
    for letter in message:
        # checks for space
        if(letter != ' '):
            i = 0  # couunter to keep track of space
            citext += letter  # storing morse code of a single character
        # in case of space
        else:
            # if i = 1 that indicates a new character
            i += 1
            # if i = 2 that indicates a new word
            if i == 2:
                decipher += ' '  # adding space to separate words
            else:
                # accessing the keys using their values (reverse of encryption)
                decipher += list(MORSE_CODE_DICT.keys()
                                 )[list(MORSE_CODE_DICT.values()).index(citext)]
                citext = ''

    return decipher

# Hard-coded driver function to run the program


def main():
    message = 'ALICE KILED BOB'
    result = encrypt(message.upper())
    print(result)

    message = '-.- . ...- .. -.  ... .--. .- -.-. . -.--  .. ...  -.- . -.-- ... . .-.  ... --- --.. .'
    result = decrypt(message)
    print(result)


# Executes the main function
if __name__ == '__main__':
    main()

from dis import dis  # Ignore PycodestyleBear (E402)
dis(encrypt)