Data commit

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

@@ -0,0 +1,4 @@
+>>> u'foo'.encode('rot13')
+'sbb'
+>>> 'sbb'.decode('rot13')
+u'foo'

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

@@ -0,0 +1,5 @@
+>>> 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 +1,20 @@
+#!/usr/bin/env python
+import string
+
+TRANSLATION_TABLE = str.maketrans(
+    string.ascii_uppercase + string.ascii_lowercase,
+    string.ascii_uppercase[13:] + string.ascii_uppercase[:13] +
+    string.ascii_lowercase[13:] + string.ascii_lowercase[:13]
+)
+
+
+def rot13(s):
+    """Return the rot-13 encoding of s."""
+    return s.translate(TRANSLATION_TABLE)
+
+
+if __name__ == "__main__":
+    """rot-13 encode the input files, or stdin if no files are provided."""
+    import fileinput
+    for line in fileinput.input():
+        print(rot13(line), end="")

Task/Rot-13/Python/rot-13-4.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="")