def run(self, **run_params):
        """Run the simulation (or lookup the results in the cache)."""
        self.use_default_run_params()
        self.set_run_params(**run_params)
        if self.print_run_params:
            print("Run Params:", self.run_params)
        self.results = self._backend.backend_run()
Run the simulation (or lookup the results in the cache).