def __init__(self, filename=None):
        BaseIO.__init__(self, filename)
Takes a string such as ``2009-07-23`` and returns datetime object of
dataset/ETHPy150Open NeuralEnsemble/python-neo/neo/io/plexonio.py/PlexonIO.__init__--crossover with--dataset/ETHPy150Open diefenbach/django-lfs/lfs/core/utils.py/get_start_day