AI-Class: Optional NLP Programming Task (Part One - Rotation Cipher)

nlp_01.py

#!/bin/env python
"""
Optional NLP Programming Task - Part One (Rotation Cipher)
==========================================================

"""
__author__ = 'Jan Beilicke <dev +at+ jotbe-fx +dot+ de>'
__date__ = '2011-12-19'

if __name__ == '__main__':
    code = 'Esp qtcde nzyqpcpynp zy esp ezatn zq Lcetqtntlw Tyepwwtrpynp hld spwo le Olcexzfes Nzwwprp ty estd jplc.'
    alphabet = 'abcdefghjiklmnopqrstuvwxyz'

    for i in range(25):
        out = ''
        for character in code.lower():
            if character == ' ':
                out += ' '
                continue
            char_pos = alphabet.find(character)
            subst_char_pos = (char_pos - i) % len(alphabet)
            out += alphabet[subst_char_pos]
        print i, '=>', out