log_utils.py 文件源码

def setup_logger():
    """Setup a colored logger if available and possible"""

    logger = logging.getLogger('clikraken')
    logger.setLevel(logging.DEBUG)

    # log to stdout from DEBUG to INFO
    ch_out = logging.StreamHandler(sys.stdout)
    ch_out.setLevel(logging.DEBUG)
    ch_out.addFilter(LessThanFilter(logging.WARNING))

    # WARNING and above goes to stderr
    ch_err = logging.StreamHandler(sys.stderr)
    ch_err.setLevel(logging.WARNING)

    format_str = '{levelname:8} - {message}'

    # basic formatter
    f = logging.Formatter(fmt=format_str, style='{')

    # colored formatted
    if have_colorlog:
        cf = colorlog.ColoredFormatter(fmt='{log_color}' + format_str, style='{')
    else:
        cf = f

    # only use the colored formatter when we are outputting to a terminal
    if os.isatty(2):
        ch_out.setFormatter(cf)
        ch_err.setFormatter(cf)
    else:
        ch_out.setFormatter(f)
        ch_err.setFormatter(f)

    logger.addHandler(ch_out)
    logger.addHandler(ch_err)

    return logger