ciphers/morse_code.py · July1921/Algorithms-Python

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Algorithms-Python

ciphers

morse_code.py

morse_code.py 1.67 KB

#!/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()

一键复制编辑原始数据按行查看历史

Christian Clauss 提交于 2021年10月17日 00:57 +08:00 . Add tests to morse_code.py (#5337)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

#!/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()