Flexible Rot13 Function


/ Published in: Python
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This function takes 2 arguments, first is the string to be encoded (or decoded) the second is optional and can be used to change the rotation amount to something other than 13.


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  1. def rot(s, n=13):
  2. r = ""
  3. for c in s:
  4. cc = c
  5. if cc.isalpha():
  6. cc = cc.lower()
  7. o = ord(cc)
  8. ro = (o+n) % 122
  9. if ro == 0: ro = 122
  10. if ro < 97: ro += 96
  11. cc = chr(ro)
  12. r = ''.join((r,cc))
  13. return r

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