def first(*args, **kwargs):
    for directory in args:
        if exists(directory, **kwargs):
            return directory
set stone
dataset/ETHPy150Open fabric/fabric/fabric/contrib/files.py/first--crossover with--dataset/ETHPy150Open pybrain/pybrain/pybrain/rl/environments/twoplayergames/gomoku.py/GomokuGame._setStone