def max(self):
        return _wrap(max(self))
use Python's os.exists to check if something exists or not
dataset/ETHPy150Open EntilZha/PyFunctional/functional/pipeline.py/Sequence.max--crossover with--dataset/ETHPy150Open Esri/solutions-geoprocessing-toolbox/suitability/toolboxes/scripts/NAMDownload.py/checkOSExists