code: def get_validation_metric_points(model_path: str, metric: str):
      
      metrics_path = os.path.join(model_path, C.METRICS_NAME)
      data = read_metrics_file(metrics_path)
      return [(d['%s-val' % metric], cp) for cp, d in enumerate(data, 1)]
docs: Returns tuples of value and checkpoint for given metric from metrics file at model_path.
      :param model_path: Model path containing .metrics file.
      :param metric: Metric values to extract.
      :return: List of tuples (value, checkpoint).