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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def super_basis(self):
 """ Generate the superoperator basis in which the Choi matrix can be represented. The follows the definition in `Chow et al. <https://doi.org/10.1103/PhysRevLett.109.060501>`_ :return (OperatorBasis):
 The super basis as an OperatorBasis object. """


        labels_ops = [(bnl + "^T (x) " + bml, qt.sprepost(bm, bn)) for (bnl, bn), (bml, bm) in
                      itertools.product(self, self)]
        return OperatorBasis(labels_ops)