rot13 in a more Pythonic style?

[bearophileHUGS at lycos.com]

Martin P. Hellwig
> for me (personal) being Pythonic means that I should
> separate the logic and variables, etc...

Well, for me me Pythonic means using built-in functionalities as much
as possible (like using encode("rot13") or translate), and to write
less code, (avoiding overgeneralizations from the start too). It means
other things too.

Bye,
bearophile