Fixed stats.py
Fixed stats.py

jansel/opentuner,Sierangho/opentuner,Sierangho/opentuner,jbosboom/opentuner,Sierangho/opentuner,phrb/opentuner,ucb-sejits/opentuner,lazyparser/opentuner,jansel/opentuner,lazyparser/opentuner,ucb-sejits/opentuner,lazyparser/opentuner,Sierangho/opentuner,phrb/opentuner,jbosboom/opentuner,lazyparser/opentuner