"""
 new_cipher.py

 exploring functions with
 a cipher example from before
"""

# THIS HAS NOT BEEN TESTED

def encode_char(character, key):
    """ Return one character, encodeded.
        >>> encode_char('a', 3)
        'd'
    """
    crypt_char = chr(((ord(char) - ord('a') + key) % 26) + ord('a'))
    return crypt_char

def encode_word(word, key):
    """ Return word encrypted by key
        >>> encode_word("cat", 3)
        'fdw'
    """
    new_word = ""
    for char in word:
        new_word = new_word + encode_char(char, key)
    return new_word

def main():
  print "-- cipher ---\n"
  key = int(raw_input("What is the key? (13) "))
  word = raw_input("What is the word? (cat) ")
  new_word = encrypt_word(word, key)
  print "'%s' encrypted is '%s' \n" % (word, new_word)

if __name__ == "__main__":
    import doctest
    doctest.testmod()
    main()