def _get_log_formatter(verbosity_level):
    """
    Get a log formatter string based on the supplied numeric verbosity level.
    :param int verbosity_level: the verbosity level
    :return: the log formatter string
    :rtype: str
    """
    formatter = "%(levelname)s: %(message)s"
    if verbosity_level >= 3:
        formatter = "%(levelname)s: %(name)s: %(message)s"
    return formatter