def has(self, *patterns):
        return any(a.has(*patterns) for a in self._mat)
Make the model object behave like a dict.
dataset/ETHPy150Open sympy/sympy/sympy/matrices/matrices.py/MatrixBase.has--crossover with--dataset/ETHPy150Open openstack/oslo.db/oslo_db/sqlalchemy/models.py/ModelBase._as_dict