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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(self, name):
 """Retrieves the cluster by the given name. :param str name: name of the cluster (identifier) :return: instance of :py:class:`elasticluster.cluster.Cluster` that matches the given name """

        if name not in self.clusters:
            raise ClusterNotFound("Cluster %s not found." % name)
        return self.clusters.get(name)