Fix for py 3
Fix for py 3

mizzao/ggplot,ricket1978/ggplot,Cophy08/ggplot,benslice/ggplot,assad2012/ggplot,xguse/ggplot,kmather73/ggplot,andnovar/ggplot,benslice/ggplot,udacity/ggplot,mizzao/ggplot,smblance/ggplot,ricket1978/ggplot,xguse/ggplot,wllmtrng/ggplot,bitemyapp/ggplot