Morse Encoder

import sys
class MorseCoder:
def __init__(self):
self.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": "-----",
", ": "--..--",
".": ".-.-.-",
"?": "..--..",
"/": "-..-.",
"-": "-....-",
"(": "-.--.",
")": "-.--.-",
}

# Function to encrypt the string
# according to the morse code chart
def encrypt(self, message):
message = message.upper()
cipher = ""
for letter in message:
if letter != " ":
# Looks up the dictionary and adds the
# correspponding morse code
# along with a space to separate
# morse codes for different characters
cipher += self.MORSE_CODE_DICT[letter] + " "
else:
# 1 space indicates different characters
# and 2 indicates different words
cipher += " "

return cipher

# Function to decrypt the string
# from morse to english
def decrypt(self, message):
# extra space added at the end to access the
# last morse code
message += " "

decipher = ""
citext = ""
for letter in message:
# checks for space
if letter != " ":
# counter to keep track of space
i = 0

# storing morse code of a single character
citext += letter

# in case of space
else:
# if i = 1 that indicates a new character
i += 1

# if i = 2 that indicates a new word
if i == 2:

# adding space to separate words
decipher += " "
else:
# accessing the keys using their values (reverse of encryption)
decipher += list(self.MORSE_CODE_DICT.keys())[
list(self.MORSE_CODE_DICT.values()).index(citext)
]
citext = ""

return decipher


if __name__ == "__main__":
if len(sys.argv) == 1:
print("Usage: https://fech.space/morse/encode/hello there")
else:
from urllib.parse import unquote
if sys.argv[1] == "encode":
safetext = unquote(sys.argv[2])
print(MorseCoder().encrypt(safetext))

elif sys.argv[1] == "decode":
safetext = unquote(sys.argv[2])
print(MorseCoder().decrypt(safetext))

else:
print(f"Error: Unknown operation {sys.argv[1]}")