Caesar cipher in one line

Can we create an encrypt and decrypt using Caesar cipher in one line? I’m sure you can. Here is one way to do it in Python. This assumes the text is typed in English (or where the lower() function on a string can work).
Encrypt
import sys;print ''.join([chr(x) for x in [x if x else x+ord('a') for x in [ (ord(x.lower())+1)%(ord('z')+1) for x in sys.argv[1]]]])
Decrypt
'import sys;print '.join([chr(x) for x in [x if (x%(ord('a')-1)) else ord('z') for x in [ (ord(x)-1) for x in sys.argv[1]]]])
So, now you can send your next missive in shift+1 cipher ! Of course, you are not going to send trade secrets that way, would you? 🙂