Just another update

Task/Rot-13/Python/rot-13-1.py

@@ -1,21 +1,4 @@
-#!/usr/bin/env python
-import string
-def rot13(s):
-   """Implement the rot-13 encoding function: "rotate" each letter by the
-      letter that's 13 steps from it (wrapping from z to a)
-   """
-   return s.translate(
-       string.maketrans(
-           string.ascii_uppercase + string.ascii_lowercase,
-           string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
-           string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
-           )
-       )
-if __name__ == "__main__":
-   """Peform line-by-line rot-13 encoding on any files listed on our
-      command line or act as a standard UNIX filter (if no arguments
-      specified).
-   """
-   import fileinput
-   for line in fileinput.input():
-      print rot13(line),  # (Note the trailing comma; avoid double-spacing our output)!
+>>> u'foo'.encode('rot13')
+'sbb'
+>>> 'sbb'.decode('rot13')
+u'foo'

Task/Rot-13/Python/rot-13-2.py

@@ -1,21 +1,5 @@
-#!/usr/bin/env python
-import string
-def rot13(s):
-   """Implement the rot-13 encoding function: "rotate" each letter by the
-      letter that's 13 steps from it (wrapping from z to a)
-   """
-   return s.translate(
-       str.maketrans(
-           string.ascii_uppercase + string.ascii_lowercase,
-           string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
-           string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
-           )
-       )
-if __name__ == "__main__":
-   """Peform line-by-line rot-13 encoding on any files listed on our
-      command line or act as a standard UNIX filter (if no arguments
-      specified).
-   """
-   import fileinput
-   for line in fileinput.input():
-      print(rot13(line), end="")
+>>> import codecs
+>>> codecs.encode("The quick brown fox jumps over the lazy dog", "rot13")
+'Gur dhvpx oebja sbk whzcf bire gur ynml qbt'
+>>> codecs.decode(_, "rot13")
+'The quick brown fox jumps over the lazy dog'

Task/Rot-13/Python/rot-13-3.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+import string
+def rot13(s):
+   """Implement the rot-13 encoding function: "rotate" each letter by the
+      letter that's 13 steps from it (wrapping from z to a)
+   """
+   return s.translate(
+       string.maketrans(
+           string.ascii_uppercase + string.ascii_lowercase,
+           string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
+           string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
+           )
+       )
+if __name__ == "__main__":
+   """Peform line-by-line rot-13 encoding on any files listed on our
+      command line or act as a standard UNIX filter (if no arguments
+      specified).
+   """
+   import fileinput
+   for line in fileinput.input():
+      print rot13(line),  # (Note the trailing comma; avoid double-spacing our output)!

Task/Rot-13/Python/rot-13-4.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+import string
+def rot13(s):
+   """Implement the rot-13 encoding function: "rotate" each letter by the
+      letter that's 13 steps from it (wrapping from z to a)
+   """
+   return s.translate(
+       str.maketrans(
+           string.ascii_uppercase + string.ascii_lowercase,
+           string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
+           string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
+           )
+       )
+if __name__ == "__main__":
+   """Peform line-by-line rot-13 encoding on any files listed on our
+      command line or act as a standard UNIX filter (if no arguments
+      specified).
+   """
+   import fileinput
+   for line in fileinput.input():
+      print(rot13(line), end="")

Task/Rot-13/Python/rot-13-5.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+from __future__ import print_function
+import string
+lets = string.ascii_lowercase
+key = {x:y for (x,y) in zip(lets[13:]+lets[:14], lets)}
+key.update({x.upper():key[x].upper() for x in key.keys()})
+encode = lambda x: ''.join((key.get(c,c) for c in x))
+if __name__ == '__main__':
+   """Peform line-by-line rot-13 encoding on any files listed on our
+      command line or act as a standard UNIX filter (if no arguments
+      specified).
+   """
+   import fileinput
+   for line in fileinput.input():
+      print(encode(line), end="")