22 lines
735 B
Python
22 lines
735 B
Python
#!/usr/bin/env python
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import string
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def rot13(s):
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"""Implement the rot-13 encoding function: "rotate" each letter by the
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letter that's 13 steps from it (wrapping from z to a)
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"""
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return s.translate(
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str.maketrans(
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string.ascii_uppercase + string.ascii_lowercase,
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string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
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string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
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)
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)
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if __name__ == "__main__":
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"""Peform line-by-line rot-13 encoding on any files listed on our
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command line or act as a standard UNIX filter (if no arguments
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specified).
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"""
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import fileinput
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for line in fileinput.input():
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print(rot13(line), end="")
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