def failure_traceback(fail):
    return fail._traceback
the core method to be implemented bu all TwoPlayerGames:
dataset/ETHPy150Open crossbario/txaio/txaio/aio.py/failure_traceback--crossover with--dataset/ETHPy150Open pybrain/pybrain/pybrain/rl/environments/twoplayergames/twoplayergame.py/TwoPlayerGame.doMove