def format(file_metrics, build_metrics):
    """compute output in JSON format."""
    metrics = {'files': file_metrics}
    if build_metrics:
        metrics['build'] = build_metrics
    body = json.dumps(metrics, sort_keys=True, indent=4) + '\n'
    return body
def format ( file_metrics , build_metrics ) : metrics = { 'files' : file_metrics } if build_metrics : metrics [ 'build' ] = build_metrics body = json . dumps ( metrics , sort_keys = True , indent = 4 ) + '\n' return body
compute output in JSON format.