Fix Python3 compatibility issue
Fix Python3 compatibility issue

hantek/fuel,bouthilx/fuel,EderSantana/fuel,capybaralet/fuel,dribnet/fuel,laurent-dinh/fuel,dmitriy-serdyuk/fuel,ejls/fuel,lamblin/fuel,aalmah/fuel,laurent-dinh/fuel,rodrigob/fuel,lamblin/fuel,dhruvparamhans/fuel,dmitriy-serdyuk/fuel,dribnet/fuel,chrishokamp/fuel,mila-udem/fuel,chrishokamp/fuel,janchorowski/fuel,bouthilx/fuel,glewis17/fuel,udibr/fuel,orhanf/fuel,hantek/fuel,dwf/fuel,aalmah/fuel,jbornschein/fuel,glewis17/fuel,ejls/fuel,dwf/fuel,markusnagel/fuel,mila-udem/fuel,harmdevries89/fuel,mjwillson/fuel,rizar/fuel,rodrigob/fuel,markusnagel/fuel,vdumoulin/fuel,vdumoulin/fuel,janchorowski/fuel,jbornschein/fuel,rizar/fuel,harmdevries89/fuel,EderSantana/fuel,capybaralet/fuel,orhanf/fuel,udibr/fuel,mjwillson/fuel,codeaudit/fuel,dhruvparamhans/fuel,codeaudit/fuel