def _parse_quniform(self, param_value):
        '''parse type of quniform parameter and return a list'''
        if param_value[2] < 2:
            raise RuntimeError("The number of values sampled (q) should be at least 2")
        low, high, count = param_value[0], param_value[1], param_value[2]
        interval = (high - low) / (count - 1)
        return [float(low + interval * i) for i in range(count)]
parse type of quniform parameter and return a list