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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 to_dict(self):
 """ Create a JSON serializable representation of the noise model. For example:: { "gates": [ ] "assignment_probs": { "0": [[.8, .1], [.2, .9]], "1": [[.9, .4], [.1, .6]], } } :return: A dictionary representation of self. :rtype: Dict[str,Any] """

        return {
            "gates": [km.to_dict() for km in self.gates],
            "assignment_probs": {str(qid): a.tolist() for qid, a in self.assignment_probs.items()},
        }