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Update morse_code_implementation.py (#2386)

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* Update morse_code_implementation.py

Added more characters to MORSE_CODE_DICT for a more complete dictionary.
Split words with "/" instead of a space as is standard.
Fixed bug when encrypting a message with a comma.

* Fixed comment typo
This commit is contained in:
Thomas Voss 2020-09-25 19:03:15 +02:00 committed by GitHub
parent b81fcef66b
commit e92cd9d5c5
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 30 deletions
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46
ciphers/morse_code_implementation.py
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@ -1,6 +1,5 @@
# Python program to implement Morse Code Translator # Python program to implement Morse Code Translator
# Dictionary representing the morse code chart # Dictionary representing the morse code chart
MORSE_CODE_DICT = { MORSE_CODE_DICT = {
"A": ".-", "A": ".-",
@ -39,13 +38,22 @@ MORSE_CODE_DICT = {
"8": "---..", "8": "---..",
"9": "----.", "9": "----.",
"0": "-----", "0": "-----",
"&": ".-...",
"@": ".--.-.",
":": "---...",
",": "--..--", ",": "--..--",
".": ".-.-.-", ".": ".-.-.-",
"'": ".----.",
'"': ".-..-.",
"?": "..--..", "?": "..--..",
"/": "-..-.", "/": "-..-.",
"=": "-...-",
"+": ".-.-.",
"-": "-....-", "-": "-....-",
"(": "-.--.", "(": "-.--.",
")": "-.--.-", ")": "-.--.-",
# Exclamation mark is not in ITU-R recommendation
"!": "-.-.--",
} }
@ -53,42 +61,24 @@ def encrypt(message):
cipher = "" cipher = ""
for letter in message: for letter in message:
if letter != " ": if letter != " ":
cipher += MORSE_CODE_DICT[letter] + " " cipher += MORSE_CODE_DICT[letter] + " "
else: else:
cipher += "/ "
cipher += " " # Remove trailing space added on line 64
return cipher[:-1]
return cipher
def decrypt(message): def decrypt(message):
message += " "
decipher = "" decipher = ""
citext = "" letters = message.split(" ")
for letter in message: for letter in letters:
if letter != "/":
if letter != " ":
i = 0
citext += letter
else:
i += 1
if i == 2:
decipher += " "
else:
decipher += list(MORSE_CODE_DICT.keys())[ decipher += list(MORSE_CODE_DICT.keys())[
list(MORSE_CODE_DICT.values()).index(citext) list(MORSE_CODE_DICT.values()).index(letter)
] ]
citext = "" else:
decipher += " "
return decipher return decipher