def _statistics(values, suffix):
    """Returns a List of tuples to use with Keras Progbar.

    Args:
        values (List[int]): list of values.

    Return:
        Minimum, maximum and mean value for the given list.

    """
    min_value = ('min_{}'.format(suffix), min(values))
    max_value = ('max_{}'.format(suffix), max(values))
    mean_value = ('mean_{}'.format(suffix), sum(values) / len(values))
    return [min_value, max_value, mean_value]