textEncoder.py

#!/usr/bin/python
import string
import sys

print "NOT WORKING YET, no decode"
# text(limited set) -> binary representation -> base 8 representation -> exctact 0-88 pairs, add 32, get ascii code
sys.exit(0)


def getCharacters():
    chars = string.ascii_lowercase
    punc = ['.', ',', '!', '?', '<END>']
    return [ c for c in chars ] + punc



def getLetter(bits):
    try:   
        result = string.ascii_lowercase[int(bits,2)]
    except Exception as e:
        print e
        result = "?"
    finally:
        return result


def getBits(letter):
    alphabet = getCharacters() 
    try:
        result = alphabet.index(token)
    except Exception as e:
        print e
        result = -1
    finally:
        return result

# http://stackoverflow.com/questions/8898807/pythonic-way-to-iterate-over-bits-of-integer
def bits(number):
    mask = 2**5 - 1
    while number:
        res = mask & number
        yield res
        number = number >> 5

def chunks(l, n=2):
    """ Yield successive n-sized chunks from l.
    """
    for i in xrange(0, len(l), n):
        yield l[i:i+n]




def textToBinary(text):
    alphabet = getCharacters()
    col = []
    shift = 0
    for token in text.lower():
        num = 30 # ' coded as '?'
        if token in alphabet:
            num = alphabet.index(token) + 1
        num = num << shift
        shift = shift + 5
        col.append(num)
    #col.append(31 << shift)
    return sum(col)

def numberToAscii(number):
    chars = str(number)
    chars = chars.replace('L','')
    col = ""
    if (len(chars) % 2 == 1):
        chars = '0' + chars
    for x in chunks(chars):
        number = int(x) + 33
        letter = str(unichr(number))
        print x + ": " + str(number) + " " + letter
        col += letter
    return col

numberToAscii(oct(textToNumber("hello, how are you")))


decode: ascii -> octal -> bit -> character map