first failing version :)

.gitignore

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+*.pyc

onetimepad.py

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+
+
+def encode(msg, pad):
+    return msg
+
+
+def decode(msg, pad):
+    return msg

setup.py

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+import sys
+from distutils.core import setup
+
+
+SETUP_ARGS = dict(
+    name='OneTimePad',
+    version='0.1.0',
+    author='Dan Buch',
+    author_email='daniel.buch@gmail.com',
+    url='http://github.com/meatballhat/OneTimePad',
+    description='one-time pad cryptosystem described in "Cryptonomicon"',
+    long_description='',
+    py_modules=['onetimepad'],
+)
+
+
+def main():
+    setup(**SETUP_ARGS)
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())

test_onetimepad.py

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+import random
+
+import unittest
+import onetimepad as OT
+
+
+class TestOneTimePad(unittest.TestCase):
+    pad = 'THISISMYONETIMEPADANDITISNOTESPECIALLYBIG' \
+          'BUTITISBIGENOUGHFORMYUSESIFYOUDONTMINDTHX'
+
+    def test_encode(self):
+        enc = OT.encode(IN_MSG, self.pad)
+        self.assertEqual(EXPECTED_ENCODED, enc)
+
+    def test_decode(self):
+        dec = OT.decode(EXPECTED_ENCODED, self.pad)
+        self.assertEqual(IN_MSG, dec)
+
+
+IN_MSG = 'TWOBYFOURBOARDSONEHUNDREDCOUNTLENGTHEIGHTFEET'
+EXPECTED_ENCODED = 'huteshusoahutseohusoaeutoaehusoat'