def __init__(self, fname, fields):
        self.data = pd.read_csv(fname, names=fields, parse_dates=True)
check that t2 and t3 have identical streams
dataset/ETHPy150Open scottjbarr/bitfinex/bitfinex/backtest/data.py/CSVDataSource.__init__--crossover with--dataset/ETHPy150Open ioam/param/tests/testdynamicparams.py/TestDynamicParameterBasics.test_matching_numbergen_streams