Python: Rot13 text transformation

If GPG isn’t enough, you can use ROT13 for your encryption needs! ;)

def rotate_string(s, r=0):
    s2=""
    for c in s:
        if c >= 'a' and c <= 'z':
            c2 = chr(((ord(c)-ord('a')) + r) % 26 + ord('a'))
        elif c >= 'A' and c <= 'Z':
            c2 = chr(((ord(c)-ord('A')) + r) % 26 + ord('A'))
        else:
            c2 = c
        s2 += c2
    return s2

Download source from github gist

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