How do I do a Rot13?

[Kalle Svensson]

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[John Draper]
> How do I write a function to do a "rot13" to a string?
> Do I have to do this character-by-character or is there a translate
> function which will do this for me?

A char-by-char approach might be the most clear, but using the
functions translate and maketrans in the string module is an option.
A bonus is that it's probably faster.

Peace,
  Kalle
- -- 
Kalle Svensson, http://www.juckapan.org/~kalle/
Student, root and saint in the Church of Emacs.
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