support py3k..
support py3k..

cloverstd/WeRoBot,huangzhe1218/webchat-roboto,weberwang/WeRoBot,FlyRabbit/WeRoBot,whtsky/WeRoBot,kmalloc/WeRoBot,reorx/WeRoBot,weberwang/WeRoBot,Zeacone/WeRoBot,cloverstd/WeRoBot,adrianzhang/WeRoBot,adam139/WeRobot,Infixz/WeRoBot,FlyRabbit/WeRoBot,notwin/WeRoBot,whtsky/WeRoBot,whtsky/WeRoBot,reorx/WeRoBot,tdautc19841202/WeRoBot,Zhenghaotao/WeRoBot,chenjiancan/WeRoBot,huangzhe1218/webchat-roboto,adam139/WeRobot,one-leaf/WeRoBot