"""
A program for coding and decoding messages
"""
SHIFT = 1
def shift_coder(str):
"""
Takes a string and codes it
"""
characters = list(str)
coded_characters = []
for dummy_char in characters:
ascii_int = ord(dummy_char)
if ascii_int in range(32) + range(32, 65) + range(91, 97) + \
range(123, 128):
new_char = chr(ascii_int)
elif ascii_int in range(65, 91):
new_char = chr(((ord(dummy_char) + SHIFT - 65) % 26) + 65)
elif ascii_int in range(97, 123):
new_char = chr(((ord(dummy_char) + SHIFT - 97) % 26) + 97)
coded_characters.append(new_char)
coded_str = "".join(coded_characters)
return coded_str
def shift_decoder(str):
"""
Takes a coded string and decodes it into the original message
"""
characters = list(str)
coded_characters = []
for dummy_char in characters:
ascii_int = ord(dummy_char)
if ascii_int in range(32) + range(32, 65) + range(91, 97) + \
range(123, 128):
new_char = chr(ascii_int)
elif ascii_int in range(65, 91):
new_char = chr(((ord(dummy_char) - SHIFT - 65) % 26) + 65)
elif ascii_int in range(97, 123):
new_char = chr(((ord(dummy_char) - SHIFT - 97) % 26) + 97)
coded_characters.append(new_char)
coded_str = "".join(coded_characters)
return coded_str
