py-geeks / morse-code

Morse encoder and decoder system in python

Morse-Code

Morse encoder and decoder system in python. It is an intermediate level project but quite easy to un derstand.

Tools and Languages

Libraries used

This is an intermediate level project but still doesn't need any extra libraries.

Breaking the code

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':'-----', ', ':'--..--', '.':'.-.-.-', 
                    '?':'..--..', '/':'-..-.', '-':'-....-', 
                    '(':'-.--.', ')':'-.--.-'} 

Declaring the morse code dictionary containing morse codes for alphabets and symbols.

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

This function takes the code in english and returns the morse encrypted message.

def decrypt(message): 
  
    # extra space added at the end to access the 
    # last morse code 
    message += ' '
  
    decipher = '' 
    citext = '' 
    for letter in message: 
  
        # checks for space 
        if (letter != ' '): 
  
            # counter to keep track of space 
            i = 0
  
            # storing morse code of a single character 
            citext += letter 
  
        # 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 : 
  
                 # adding space to separate words 
                decipher += ' '
            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 

This function takes the code in morse encrypted message and returns the decrypted message in english.

def main(): 
    print("Enter 1. Encode or 2. Decode: ")
    choice = int(input())
    if choice == 1:
        print("Enter the message in English to encrypt: ")
        message = input()
        result = encrypt(message.upper()) 
        print (result) 
    
    elif choice == 2:
        print("Enter the morse encrypted code: ")
        message = input()
        result = decrypt(message) 
        print (result) 

    else:
        print("Invalid choice")
        exit
# Executes the main function 
if __name__ == '__main__': 
    main() 

Hard-coded driver function to run the program.

Sample Output

Developed By:

Ankush Mishra