def __contains__(self, key):

        return key in self._dat
Given an array of numerator coefficient arrays [[a_1, a_2,...,
dataset/ETHPy150Open OpenMDAO/OpenMDAO/openmdao/core/vec_wrapper.py/VecWrapper.__contains__--crossover with--dataset/ETHPy150Open scipy/scipy/scipy/signal/filter_design.py/_align_nums