second version of shift cipher. This time shift stays the same for encode or decode

shiftv2.py

op = input('encode or decode? ')
text = input('what is the text: ')
key = input('What is the shift: ')

if op == 'encode':
  for i in text:
    uni = ord(i)
    encode = int(uni) + int(key)
    print(chr(encode), end='')
else:
  for i in text:
    uni = ord(i) 
    decode = int(uni) - int(key)
    print(chr(decode), end='')