32 lines
694 B
Python
32 lines
694 B
Python
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# Runestone.Academy thinkcspy course
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# Chapter 9
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# Problem 21
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import string
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def rot13(mess):
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# Your code here
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alpha = string.ascii_lowercase
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newStr = ""
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pos = 0
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mess = mess.lower()
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for char in mess:
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if char in alpha:
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pos = alpha.index(char)
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if pos <= 12:
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pos += 13
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else:
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pos = pos % 13
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newStr += alpha[pos]
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else:
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newStr += char # no rules apply so keep the character
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return newStr
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print(rot13('abcde'))
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print(rot13('nopqr'))
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print(rot13(rot13('Since rot13 is symmetric you should see this message')))
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