返回一个输出到控制台和文件的 logger

get_logger.py

def get_logger(log_path):
    logger = logging.getLogger(__name__)
    logger.setLevel(logging.DEBUG)
    st_handler = logging.StreamHandler(sys.stderr)
    st_handler.setLevel(logging.DEBUG)
    st_handler.setFormatter(logging.Formatter(
        '%(asctime)s %(levelname)s: %(message)s '
        '[in %(pathname)s:%(lineno)d]'))

    file_handler = RotatingFileHandler(log_path,
                                       maxBytes=10240, backupCount=10, mode='w')
    file_handler.setFormatter(logging.Formatter(
        '%(asctime)s %(levelname)s: %(message)s '
        '[in %(pathname)s:%(lineno)d]'))
    file_handler.setLevel(logging.INFO)
    logger.addHandler(file_handler)
    logger.addHandler(st_handler)
    
    return logger