<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def setup_logger(logging_level, logging_format):
 """Setup default logging for ray."""

    logger = logging.getLogger("ray")
    if type(logging_level) is str:
        logging_level = logging.getLevelName(logging_level.upper())
    logger.setLevel(logging_level)
    global _default_handler
    if _default_handler is None:
        _default_handler = logging.StreamHandler()
        logger.addHandler(_default_handler)
    _default_handler.setFormatter(logging.Formatter(logging_format))
    logger.propagate = False