def format(self, value):
        if isinstance(value, float):
            return '\t%0.4f'
        elif isinstance(value, bool):
            return '\t%s'
        elif isinstance(value, int) or isinstance(value, long):
            return '\t%d'
        else:
            return '\t%s'
returns format string for value type
dataset/ETHPy150Open ioflo/ioflo/ioflo/base/logging.py/Log.format