solution.py

# In this kata you have to write a simple Morse code decoder.
# While the Morse code is now mostly superceded by voice and digital data communication channels,
# it still has its use in some applications around the world.
# The Morse code encodes every character as a sequence of "dots" and "dashes".
# For example, the letter A is coded as ·−, letter Q is coded as −−·−, and digit 1 is coded as ·−−−−.
# The Morse code is case-insensitive, traditionally capital letters are used.
# When the message is written in Morse code, a single space is used to separate the character codes
# and 3 spaces are used to separate words.
# For example, the message HEY JUDE in Morse code is ···· · −·−−   ·−−− ··− −·· ·.

# NOTE: Extra spaces before or after the code have no meaning and should be ignored.

# In addition to letters, digits and some punctuation, there are some special service codes,
# the most notorious of those is the international distress signal SOS (that was first issued by Titanic),
# that is coded as ···−−−···.
# These special codes are treated as single special characters, and usually are transmitted as separate words.

# Your task is to implement a function that would take the morse code as input
# and return a decoded human-readable string.

# For example:

# decodeMorse('.... . -.--   .--- ..- -.. .')
# should return "HEY JUDE"

MORSE_CODE = {
    '.-': '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',
    '-----': '0',
    '.----': '1',
    '..---': '2',
    '...--': '3',
    '....-': '4',
    '.....': '5',
    '-....': '6',
    '--...': '7',
    '---..': '8',
    '----.': '9',
    '.-.-.-': '.',
    '--..--': ',',
    '..--..': '?',
    '.----.': "'",
    '-.-.--': '!',
    '-..-.': '/',
    '-.--.': '(',
    '-.--.-': ')',
    '.-...': '&',
    '---...': ':',
    '-.-.-.': ';',
    '-...-': '=',
    '.-.-.': '+',
    '-....-': '-',
    '..--.-': '_',
    '.-..-.': '"',
    '...-..-': '$',
    '.--.-.': '@',
    '...---...': 'SOS',
}


def decodeMorse(morseCode):
    return ' '.join(
        ''.join(MORSE_CODE[letter] for letter in word.split(' ')) for word in morseCode.strip().split('   ')
    )