python 字符转数字（1字节转数字）

#-*- coding=utf-8 -*-
#!/usr/bin/env python

import base64, binascii, struct

tokenBase64 = "HfhBc2ymUgSl0/Plaiq74UdU+T+tRQHf/MJi6CQwrk0="

tokenBin =  base64.decodestring(tokenBase64)
print "-----tokenBin:" + tokenBin
print len(tokenBin)
print repr(tokenBin)

for index in range( 0, len( tokenBin )):
itmp = struct.unpack( "B", tokenBin[index] )
print itmp

token = binascii.hexlify(tokenBin)
print "-----token:" + token
print len(token)
print repr(token)