Morse code is an encoding scheme that uses dashes and dots to represent numbers and letters. In this exercise, you will write a program that uses a dictionary to store the mapping from letters and numbers to Morse code. Use a period to represent a dot, and a hyphen to represent a dash. The mapping from letters and numbers to dashes and dots is shown in the table below. Your program should read a message from the user. Then it should translate each letter and number in the message to Morse code, leaving a space between each sequence of dashes and dots. Your program should ignore any characters that are not letters or numbers. The Morse code for Hello, World! is shown below:
.... . .-.. .-.. --- .-- --- .-. .-.. -..
| Letter | Code | Letter | Code | Letter | Code | Letter | Code |
|---|---|---|---|---|---|---|---|
| A | .- | J | .--- | S | ... | 1 | .---- |
| B | -... | K | -.- | T | - | 2 | ..--- |
| C | -.-. | L | .-.. | U | ..- | 3 | ...-- |
| D | -.. | M | -- | V | ...- | 4 | ....- |
| E | . | N | -. | W | .-- | 5 | ..... |
| F | ..-. | O | --- | X | -..- | 6 | -.... |
| G | --. | P | .--. | Y | -.-- | 7 | --... |
| H | .... | Q | --.- | Z | --.. | 8 | ---.. |
| I | .. | R | .-. | 0 | ----- | 9 | ----. |
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':'--..' , '0':'-----', '1':'.----',
'2':'..---', '3':'...--', '4':'....-', '5':'.....', '6':'-....', '7':'--...', '8':'---..',
'9':'----.'}
def create_morse_message(text):
morse_str = ""
for c in text:
if c.isalnum():
morse_str += morse_code_dict[c.upper()]
#Add space to make it more readable
morse_str += " "
return morse_str
def main():
morse = create_morse_message("Hello World!")
print(morse)
if __name__ == '__main__':
main()