How to use the esper.prelude.pcache.get function in esper

time, metrics = run_config(args, db_wrapper, job_config)

        if time is not None:
            price_per_hour = cluster_config.price(no_master=True)
            price_per_video = (time / 3600.0) * price_per_hour / float(sample_size)
            return price_per_video, metrics
        else:
            return None

    results = []

    for (cluster_config, job_configs) in configs:

        # Only bring up the cluster if there exists a job config that hasn't been computed
        if not force and all([pcache.has(run_name(cluster_config, job_config)) for job_config in job_configs]):
            results.append([pcache.get(run_name(cluster_config, job_config)) for job_config in job_configs])

        else:
            with make_cluster(cluster_config, no_delete=no_delete) as db_wrapper:
                log.info('Cluster config: {}'.format(cluster_config))

                def try_config(job_config):
                    log.info('Job config: {}'.format(job_config))
                    try:
                        return test_config(
                            args, db_wrapper, cluster_config, job_config)
                    except TestFailure as e:
                        print(e)
                        return (str(e), None)
                    except Exception as e:
                        traceback.print_exc()
                        return (traceback.format_exc(), None)