Make run_bench compatible with Python 3
Make run_bench compatible with Python 3

foresterre/wren,foresterre/wren,munificent/wren,minirop/wren,Rohansi/wren,munificent/wren,lluchs/wren,bigdimboom/wren,Rohansi/wren,foresterre/wren,Nelarius/wren,Rohansi/wren,minirop/wren,minirop/wren,Nelarius/wren,minirop/wren,Nave-Neel/wren,Nave-Neel/wren,Nave-Neel/wren,munificent/wren,munificent/wren,Nelarius/wren,foresterre/wren,lluchs/wren,foresterre/wren,Rohansi/wren,bigdimboom/wren,munificent/wren,bigdimboom/wren,lluchs/wren,minirop/wren,lluchs/wren,Nave-Neel/wren,Nelarius/wren,munificent/wren,Nelarius/wren,bigdimboom/wren