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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, id):
 """Get run by id"""

        run = self.backend_store.get_run(id)
        if not run:
            return abort(http_client.NOT_FOUND,
                         message="Run {} doesn't exist".format(id))
        return run_model.format_response(run)