freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/6a22d77ddf034bc4e35b1d5c.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a22d77ddf034bc4e35b1d5c	Challenge 355: Morse Code	29	challenge-355

--description--

Given a Morse code string, return the decoded message using the following table:

Code	Letter	Code	Letter
.-	A	-.	N
-...	B	---	O
-.-.	C	.--.	P
-..	D	--.-	Q
.	E	.-.	R
..-.	F	...	S
--.	G	-	T
....	H	..-	U
..	I	...-	V
.---	J	.--	W
-.-	K	-..-	X
.-..	L	-.--	Y
--	M	--..	Z

• Letters are separated by a single space
• Words are separated by three spaces

--hints--

decode_morse("--..") should return "Z".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(decode_morse("--.."), "Z")`)
}})

decode_morse("... --- ...") should return "SOS".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(decode_morse("... --- ..."), "SOS")`)
}})

decode_morse("..-. .-. . . -.-. --- -.. . -.-. .- -- .--.") should return "FREECODECAMP".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(decode_morse("..-. .-. . . -.-. --- -.. . -.-. .- -- .--."), "FREECODECAMP")`)
}})

decode_morse(".... . .-.. .-.. --- .-- --- .-. .-.. -..") should return "HELLO WORLD".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(decode_morse(".... . .-.. .-.. ---   .-- --- .-. .-.. -.."), "HELLO WORLD")`)
}})

decode_morse("- .... . --.- ..- .. -.-. -.- -... .-. --- .-- -. ..-. --- -..- .--- ..- -- .--. . -.. --- ...- . .-. - .... . .-.. .- --.. -.-- -.. --- --.") should return "THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(decode_morse("- .... .   --.- ..- .. -.-. -.-   -... .-. --- .-- -.   ..-. --- -..-   .--- ..- -- .--. . -..   --- ...- . .-.   - .... .   .-.. .- --.. -.--   -.. --- --."), "THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG")`)
}})

--seed--

--seed-contents--

def decode_morse(code):

    return code

--solutions--

def decode_morse(code):
    table = {
        '.-': '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'
    }
    return ' '.join(
        ''.join(table[c] for c in word.split(' '))
        for word in code.split('   ')
    )