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NikolayIvkin
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TheAlgorithms_Python
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ciphers/morse_code.py
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Christian Clauss
Add tests to morse_code.py (#5337)
16 окт 2021, 19:57
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16 окт 2021, 19:57
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#!/usr/bin/env python3 """ Python program to translate to and from Morse code. https://en.wikipedia.org/wiki/Morse_code """ # fmt: off 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": "-----", "&": ".-...", "@": ".--.-.", ":": "---...", ",": "--..--", ".": ".-.-.-", "'": ".----.", '"': ".-..-.", "?": "..--..", "/": "-..-.", "=": "-...-", "+": ".-.-.", "-": "-....-", "(": "-.--.", ")": "-.--.-", "!": "-.-.--", " ": "/" } # Exclamation mark is not in ITU-R recommendation # fmt: on REVERSE_DICT = {value: key for key, value in MORSE_CODE_DICT.items()} def encrypt(message: str) -> str: """ >>> encrypt("Sos!") '... --- ... -.-.--' >>> encrypt("SOS!") == encrypt("sos!") True """ return " ".join(MORSE_CODE_DICT[char] for char in message.upper()) def decrypt(message: str) -> str: """ >>> decrypt('... --- ... -.-.--') 'SOS!' """ return "".join(REVERSE_DICT[char] for char in message.split()) def main() -> None: """ >>> s = "".join(MORSE_CODE_DICT) >>> decrypt(encrypt(s)) == s True """ message = "Morse code here!" print(message) message = encrypt(message) print(message) message = decrypt(message) print(message) if __name__ == "__main__": main()