unhideMesage_textstego1.py

import sys
import os

def main():
    if len(sys.argv) != 2:
        print 'Usage: python %s <input-file>' % sys.argv[0]
        exit(1)

    input_file   = sys.argv[1]

    if not os.path.exists(input_file):
        print 'File "%s" does not exist' % input_file
        exit(1)

    with open(input_file) as f:
        container_with_secret = f.read()

    bits = ''
    space_count = 0
    for c in container_with_secret:
        if c == ' ':
            space_count += 1

        if space_count == 2:
            bits += '1'
            space_count = 0
            continue

        if c != ' ' and space_count == 1:
            bits += '0'
            space_count = 0

    print ''.join([chr(int(bits[i:i+8], 2)) for i in range(0, len(bits), 8)])


if __name__ == '__main__':
    main()