def __init__(self, level, message):
        Exception.__init__(self)
        self.level = level
        self.msg = message
set frequencies in a model according to those observed in data.
dataset/ETHPy150Open adieu/allbuttonspressed/docutils/parsers/rst/__init__.py/DirectiveError.__init__--crossover with--dataset/ETHPy150Open CGATOxford/cgat/CGAT/RateEstimation.py/setFrequencies