Cover your words, covert your string to 8-bit binary style

cover_your_words.py

#!/usr/bin/env python2
# coding: utf-8

def cover(words, separator=' '):
    return separator.join(['{:0>8}'.format(bin(ord(w))[2:]) for w in words])

def recover(words, separator=' '):
    return ''.join([chr(int(b,2)) for b in words.split(separator)])

if __name__ == '__main__':
    words = '你好世界，hello world'
    bin_words = cover(words)
    print(bin_words)
    recover_words = recover(bin_words)
    print(recover_words)

in python3

def recover(words, separator=' '):
    return  bytearray([ int(b,2) for b in words.split(separator) ]).decode('utf-8')