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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 serialize(self):
 """ Serialize the algorithm definition """

        # fill sequences
        for keys, groups in groupby(self.ports, lambda x: x.io_type):
            for seq, port in enumerate(groups):
                port.sequence = seq
        return super(AlgorithmDef, self).serialize()