python 3 fixes
python 3 fixes

RyanTech/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,chenwenbin928/tchannel,hustxiaoc/tchannel,savaki/tchannel,hustxiaoc/tchannel,Zirpon/tchannel,savaki/tchannel,vanloswang/tchannel,benfleis/tchannel,chenwenbin928/tchannel,benfleis/tchannel,i/tchannel,RyanTech/tchannel,sasa233/tchannel,chenwenbin928/tchannel,Zirpon/tchannel,vanloswang/tchannel,i/tchannel,i/tchannel,savaki/tchannel,bunnyblue/tchannel,sasa233/tchannel,bunnyblue/tchannel,benfleis/tchannel,sasa233/tchannel,bunnyblue/tchannel,Zirpon/tchannel,RyanTech/tchannel