__init__.py 文件源码

def get_fallback_logger(stream=None):
    global _fallback_logger
    if _fallback_logger:
        return _fallback_logger

    log_format = '%(asctime)s:%(levelname)s:%(message)s'
    formatter = logging.Formatter(log_format)

    level = logging.WARNING
    handler = logging.StreamHandler(stream)
    handler.setLevel(level)
    handler.setFormatter(formatter)

    logger = logging.Logger('powerline')
    logger.setLevel(level)
    logger.addHandler(handler)
    _fallback_logger = PowerlineLogger(None, logger, '_fallback_')
    return _fallback_logger