str<==>bin

str = 'iHook1Girl_@#*++非客'
key = '1234'

def str2bin(str):
    binstr = ' '.join([bin(ord(c)) for c in str])
    print(binstr)
    return binstr
    
def bin2str(bin):
    return ''.join([chr(int(b,2)) for b in bin.split(' ')])

bin = str2bin(str)
print(bin2str(bin))