uuid压缩成64位编码，uuid64位编码,SAFEHASH = [

uuid压缩成64位编码，uuid64位编码,SAFEHASH = [

SAFEHASH = [x for x in "0123456789-abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ"]def compress_UUID():    '''    根据http://www.ietf.org/rfc/rfc1738.txt,由uuid编码扩大字符域生成串    包括: [0-9a-zA-Z\-_] 共64个    长度: (32-2)/3*2 = 20    备注: 可在地球上人人都用,使用100年不重复(2^120)    :return:String    '''    row = str(uuid.uuid4()).replace('-', '')    safe_code = ''    for i in xrange(10):        enbin = "%012d" % int(bin(int(row[i * 3] + row[i * 3 + 1] + row[i * 3 + 2], 16))[2:], 10)        safe_code += (SAFEHASH[int(enbin[0:6], 2)] + SAFEHASH[int(enbin[6:12], 2)])    return safe_code