py bindings -- fix bugs in grouping
py bindings -- fix bugs in grouping

kgnk/Halide,jiawen/Halide,mikeseven/Halide,ayanazmat/Halide,fengzhyuan/Halide,ronen/Halide,kenkuang1213/Halide,mcanthony/Halide,rodrigob/Halide,kenkuang1213/Halide,lglucin/Halide,dan-tull/Halide,ronen/Halide,tdenniston/Halide,dan-tull/Halide,myrtleTree33/Halide,adasworks/Halide,myrtleTree33/Halide,dougkwan/Halide,adasworks/Halide,rodrigob/Halide,lglucin/Halide,ayanazmat/Halide,dougkwan/Halide,mikeseven/Halide,dan-tull/Halide,tdenniston/Halide,psuriana/Halide,kenkuang1213/Halide,kgnk/Halide,fengzhyuan/Halide,ronen/Halide,adasworks/Halide,delcypher/Halide,kgnk/Halide,jiawen/Halide,kgnk/Halide,kenkuang1213/Halide,smxlong/Halide,damienfir/Halide,aam/Halide,smxlong/Halide,rodrigob/Halide,delcypher/Halide,psuriana/Halide,ayanazmat/Halide,aam/Halide,dougkwan/Halide,ayanazmat/Halide,fengzhyuan/Halide,delcypher/Halide,rodrigob/Halide,damienfir/Halide,delcypher/Halide,jiawen/Halide,damienfir/Halide,aam/Halide,mcanthony/Halide,delcypher/Halide,damienfir/Halide,myrtleTree33/Halide,damienfir/Halide,gchauras/Halide,smxlong/Halide,tdenniston/Halide,delcypher/Halide,mikeseven/Halide,smxlong/Halide,mcanthony/Halide,dougkwan/Halide,lglucin/Halide,lglucin/Halide,kenkuang1213/Halide,kenkuang1213/Halide,psuriana/Halide,tdenniston/Halide,mikeseven/Halide,smxlong/Halide,ronen/Halide,psuriana/Halide,aam/Halide,dan-tull/Halide,smxlong/Halide,tdenniston/Halide,gchauras/Halide,psuriana/Halide,mcanthony/Halide,myrtleTree33/Halide,jiawen/Halide,adasworks/Halide,rodrigob/Halide,adasworks/Halide,gchauras/Halide,fengzhyuan/Halide,gchauras/Halide,jiawen/Halide,myrtleTree33/Halide,ayanazmat/Halide,mcanthony/Halide,kgnk/Halide,fengzhyuan/Halide,myrtleTree33/Halide,damienfir/Halide,ayanazmat/Halide,ayanazmat/Halide,damienfir/Halide,jiawen/Halide,dan-tull/Halide,gchauras/Halide,ayanazmat/Halide,fengzhyuan/Halide,dougkwan/Halide,dougkwan/Halide,tdenniston/Halide,adasworks/Halide,mcanthony/Halide,fengzhyuan/Halide,kgnk/Halide,lglucin/Halide,mcanthony/Halide,kgnk/Halide,aam/Halide,myrtleTree33/Halide,lglucin/Halide,delcypher/Halide,psuriana/Halide,smxlong/Halide,fengzhyuan/Halide,dougkwan/Halide,aam/Halide,delcypher/Halide,tdenniston/Halide,myrtleTree33/Halide,kgnk/Halide,ronen/Halide,aam/Halide,dan-tull/Halide,smxlong/Halide,dougkwan/Halide,ronen/Halide,damienfir/Halide,lglucin/Halide,dan-tull/Halide,kenkuang1213/Halide,rodrigob/Halide,adasworks/Halide,ronen/Halide,kenkuang1213/Halide,rodrigob/Halide,mcanthony/Halide,ronen/Halide,adasworks/Halide,jiawen/Halide,rodrigob/Halide,psuriana/Halide,dan-tull/Halide,tdenniston/Halide,mikeseven/Halide,gchauras/Halide