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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 get_physical_port(self):
 """Returns the link aggregation object or the ethernet port object."""

        obj = None
        if self.is_link_aggregation():
            obj = UnityLinkAggregation.get(self._cli, self.get_id())
        else:
            obj = UnityEthernetPort.get(self._cli, self.get_id())
        return obj